dropbear: common-channel.c annotate

annotate common-channel.c @ 1526:36ab6b091ad3

limit rsa->e size to 64 bits

author	Matt Johnston <matt@ucc.asn.au>
date	Sat, 17 Feb 2018 19:41:44 +0800
parents	06d52bcb8094
children	5916af64acd4

rev	line source
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	2 * Dropbear SSH
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	4 * Copyright (c) 2002-2004 Matt Johnston
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * Permission is hereby granted, free of charge, to any person obtaining a copy
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 * of this software and associated documentation files (the "Software"), to deal
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * in the Software without restriction, including without limitation the rights
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 * copies of the Software, and to permit persons to whom the Software is
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * furnished to do so, subject to the following conditions:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 * The above copyright notice and this permission notice shall be included in
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * all copies or substantial portions of the Software.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 * SOFTWARE. */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 /* Handle the multiplexed channels, such as sessions, x11, agent connections */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #include "packet.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 #include "ssh.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 #include "buffer.h"
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	32 #include "circbuffer.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 #include "channel.h"
9 7f77962de998 - Reworked non-channel fd handling to listener.c Matt Johnston <matt@ucc.asn.au> parents: 7 diff changeset	35 #include "listener.h"
449 3e6c536bc023 Add -W <windowsize> argument and document it. Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	36 #include "runopts.h"
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	37 #include "netio.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
1098 f95b6e87cd0c Turn send_msg_channel_open_failure()'s text and lang into const char * Gaël PORTAY <gael.portay@gmail.com> parents: 1097 diff changeset	40 const char text, const char lang);
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	41 static void send_msg_channel_open_confirmation(const struct Channel* channel,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 unsigned int recvmaxpacket);
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	44 static int writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	45 const unsigned char moredata, unsigned int morelen);
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	46 static void send_msg_channel_window_adjust(const struct Channel *channel,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 unsigned int incr);
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	48 static void send_msg_channel_data(struct Channel *channel, int isextended);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 static void send_msg_channel_eof(struct Channel *channel);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 static void send_msg_channel_close(struct Channel *channel);
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	51 static void remove_channel(struct Channel *channel);
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	52 static unsigned int write_pending(const struct Channel * channel);
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	53 static void check_close(struct Channel *channel);
78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	54 static void close_chan_fd(struct Channel *channel, int fd, int how);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 #define FD_UNINIT (-2)
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 #define FD_CLOSED (-1)
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	59 #define ERRFD_IS_READ(channel) ((channel)->extrabuf == NULL)
8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	60 #define ERRFD_IS_WRITE(channel) (!ERRFD_IS_READ(channel))
8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	61
906 4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	62 /* allow space for:
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	63 * 1 byte byte SSH_MSG_CHANNEL_DATA
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	64 * 4 bytes uint32 recipient channel
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	65 * 4 bytes string data
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	66 */
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	67 #define RECV_MAX_CHANNEL_DATA_LEN (RECV_MAX_PAYLOAD_LEN-(1+4+4))
4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	68
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 /* Initialise all the channels */
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	70 void chaninitialise(const struct ChanType *chantypes[]) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72 /* may as well create space for a single channel */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73 ses.channels = (struct Channel*)m_malloc(sizeof(struct Channel));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74 ses.chansize = 1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 ses.channels[0] = NULL;
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	76 ses.chancount = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78 ses.chantypes = chantypes;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1192 diff changeset	80 #if DROPBEAR_LISTENERS
9 7f77962de998 - Reworked non-channel fd handling to listener.c Matt Johnston <matt@ucc.asn.au> parents: 7 diff changeset	81 listeners_initialise();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86 /* Clean up channels, freeing allocated memory */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 void chancleanup() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	91 TRACE(("enter chancleanup"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 if (ses.channels[i] != NULL) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	94 TRACE(("channel %d closing", i))
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	95 remove_channel(ses.channels[i]);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 m_free(ses.channels);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	99 TRACE(("leave chancleanup"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 /* Create a new channel entry, send a reply confirm or failure */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 /* If remotechan, transwindow and transmaxpacket are not know (for a new
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 * outgoing connection, with them to be filled on confirmation), they should
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 * all be set to 0 */
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	106 static struct Channel* newchannel(unsigned int remotechan,
7 425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	107 const struct ChanType *type,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 unsigned int transwindow, unsigned int transmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 struct Channel * newchan;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 unsigned int i, j;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	113 TRACE(("enter newchannel"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 /* first see if we can use existing channels */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 if (ses.channels[i] == NULL) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 break;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 /* otherwise extend the list */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123 if (i == ses.chansize) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 if (ses.chansize >= MAX_CHANNELS) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	125 TRACE(("leave newchannel: max chans reached"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 return NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 /* extend the channels */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 ses.channels = (struct Channel**)m_realloc(ses.channels,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 (ses.chansize+CHAN_EXTEND_SIZE)sizeof(struct Channel));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 ses.chansize += CHAN_EXTEND_SIZE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 /* set the new channels to null */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 for (j = i; j < ses.chansize; j++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 ses.channels[j] = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 newchan->type = type;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 newchan->index = i;
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	145 newchan->sent_close = newchan->recv_close = 0;
78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	146 newchan->sent_eof = newchan->recv_eof = 0;
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	147 newchan->close_handler_done = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 newchan->remotechan = remotechan;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 newchan->transwindow = transwindow;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 newchan->transmaxpacket = transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 newchan->typedata = NULL;
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	154 newchan->writefd = FD_UNINIT;
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	155 newchan->readfd = FD_UNINIT;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	157 newchan->await_open = 0;
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	158 newchan->flushing = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	160 newchan->writebuf = cbuf_new(opts.recv_window);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	161 newchan->recvwindow = opts.recv_window;
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	162
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	163 newchan->extrabuf = NULL; /* The user code can set it up */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	164 newchan->recvdonelen = 0;
906 4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	165 newchan->recvmaxpacket = RECV_MAX_CHANNEL_DATA_LEN;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	167 newchan->prio = DROPBEAR_CHANNEL_PRIO_EARLY; /* inithandler sets it */
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	168
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 ses.channels[i] = newchan;
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	170 ses.chancount++;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	172 TRACE(("leave newchannel"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 return newchan;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	177 /* Returns the channel structure corresponding to the channel in the current
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	178 * data packet (ses.payload must be positioned appropriately).
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	179 * A valid channel is always returns, it will fail fatally with an unknown
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	180 * channel */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	181 static struct Channel* getchannel_msg(const char* kind) {
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	182
161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	183 unsigned int chan;
161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	184
161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	185 chan = buf_getint(ses.payload);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 if (chan >= ses.chansize \|\| ses.channels[chan] == NULL) {
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	187 if (kind) {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	188 dropbear_exit("%s for unknown channel %d", kind, chan);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	189 } else {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	190 dropbear_exit("Unknown channel %d", chan);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	191 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 return ses.channels[chan];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	196 struct Channel* getchannel() {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	197 return getchannel_msg(NULL);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	198 }
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	199
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 /* Iterate through the channels, performing IO if available */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	201 void channelio(const fd_set readfds, const fd_set writefds) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	203 /* Listeners such as TCP, X11, agent-auth */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	207 /* foreach channel */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 for (i = 0; i < ses.chansize; i++) {
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	209 /* Close checking only needs to occur for channels that had IO events */
d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	210 int do_check_close = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 /* only process in-use channels */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 continue;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	218 /* read data and send it over the wire */
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	219 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	220 TRACE(("send normal readfd"))
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	221 send_msg_channel_data(channel, 0);
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	222 do_check_close = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	225 /* read stderr data and send it over the wire */
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	226 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	227 && FD_ISSET(channel->errfd, readfds)) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	228 TRACE(("send normal errfd"))
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	229 send_msg_channel_data(channel, 1);
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	230 do_check_close = 1;
395 dc37bd8563e8 disapproval of revision '5fdf69ca60d1683cdd9f4c2595134bed26394834' Matt Johnston <matt@ucc.asn.au> parents: 394 diff changeset	231 }
dc37bd8563e8 disapproval of revision '5fdf69ca60d1683cdd9f4c2595134bed26394834' Matt Johnston <matt@ucc.asn.au> parents: 394 diff changeset	232
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 /* write to program/pipe stdin */
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	234 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	235 writechannel(channel, channel->writefd, channel->writebuf, NULL, NULL);
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	236 do_check_close = 1;
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	237 }
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	238
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	239 /* stderr for client mode */
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	240 if (ERRFD_IS_WRITE(channel)
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	241 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	242 writechannel(channel, channel->errfd, channel->extrabuf, NULL, NULL);
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	243 do_check_close = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 }
955 36eacc322e00 Make sure the check_close() handler runs when a server child process exits Matt Johnston <matt@ucc.asn.au> parents: 944 diff changeset	245
36eacc322e00 Make sure the check_close() handler runs when a server child process exits Matt Johnston <matt@ucc.asn.au> parents: 944 diff changeset	246 if (ses.channel_signal_pending) {
36eacc322e00 Make sure the check_close() handler runs when a server child process exits Matt Johnston <matt@ucc.asn.au> parents: 944 diff changeset	247 /* SIGCHLD can change channel state for server sessions */
36eacc322e00 Make sure the check_close() handler runs when a server child process exits Matt Johnston <matt@ucc.asn.au> parents: 944 diff changeset	248 do_check_close = 1;
36eacc322e00 Make sure the check_close() handler runs when a server child process exits Matt Johnston <matt@ucc.asn.au> parents: 944 diff changeset	249 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	251 /* handle any channel closing etc */
936 d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	252 if (do_check_close) {
d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	253 check_close(channel);
d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase Matt Johnston <matt@ucc.asn.au> parents: 906 diff changeset	254 }
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	255 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1192 diff changeset	257 #if DROPBEAR_LISTENERS
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	258 handle_listeners(readfds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	263 /* Returns true if there is data remaining to be written to stdin or
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	264 * stderr of a channel's endpoint. */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	265 static unsigned int write_pending(const struct Channel * channel) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266
709 abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 707 diff changeset	267 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	268 return 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	269 } else if (channel->errfd >= 0 && channel->extrabuf &&
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	270 cbuf_getused(channel->extrabuf) > 0) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	271 return 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	272 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	273 return 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	274 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	277 /* EOF/close handling */
78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	278 static void check_close(struct Channel *channel) {
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	279 int close_allowed = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 722 diff changeset	281 TRACE2(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	282 channel->writefd, channel->readfd,
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	283 channel->errfd, channel->sent_close, channel->recv_close))
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 722 diff changeset	284 TRACE2(("writebuf size %d extrabuf size %d",
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	285 channel->writebuf ? cbuf_getused(channel->writebuf) : 0,
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	286 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	287
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	288 if (!channel->flushing
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	289 && !channel->close_handler_done
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	290 && channel->type->check_close
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	291 && channel->type->check_close(channel))
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	292 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	293 channel->flushing = 1;
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	294 }
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	295
504 950c38b854a1 Don't use // style comments Matt Johnston <matt@ucc.asn.au> parents: 495 diff changeset	296 /* if a type-specific check_close is defined we will only exit
950c38b854a1 Don't use // style comments Matt Johnston <matt@ucc.asn.au> parents: 495 diff changeset	297 once that has been triggered. this is only used for a server "session"
950c38b854a1 Don't use // style comments Matt Johnston <matt@ucc.asn.au> parents: 495 diff changeset	298 channel, to ensure that the shell has exited (and the exit status
950c38b854a1 Don't use // style comments Matt Johnston <matt@ucc.asn.au> parents: 495 diff changeset	299 retrieved) before we close things up. */
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	300 if (!channel->type->check_close
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	301 \|\| channel->close_handler_done
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	302 \|\| channel->type->check_close(channel)) {
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	303 close_allowed = 1;
0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	304 }
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	305
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	306 if (channel->recv_close && !write_pending(channel) && close_allowed) {
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	307 if (!channel->sent_close) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	308 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 send_msg_channel_close(channel);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 }
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	311 remove_channel(channel);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	312 return;
397 2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' Matt Johnston <matt@ucc.asn.au> parents: 396 diff changeset	313 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314
815 35183e8a7851 Improve EOF handling for half-close. Patch from Catalin Patulea Matt Johnston <matt@ucc.asn.au> parents: 770 diff changeset	315 if ((channel->recv_eof && !write_pending(channel))
35183e8a7851 Improve EOF handling for half-close. Patch from Catalin Patulea Matt Johnston <matt@ucc.asn.au> parents: 770 diff changeset	316 /* have a server "session" and child has exited */
35183e8a7851 Improve EOF handling for half-close. Patch from Catalin Patulea Matt Johnston <matt@ucc.asn.au> parents: 770 diff changeset	317 \|\| (channel->type->check_close && close_allowed)) {
364 90cb290836de Passes most test cases now Matt Johnston <matt@ucc.asn.au> parents: 363 diff changeset	318 close_chan_fd(channel, channel->writefd, SHUT_WR);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	321 /* Special handling for flushing read data after an exit. We
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	322 read regardless of whether the select FD was set,
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	323 and if there isn't data available, the channel will get closed. */
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	324 if (channel->flushing) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	325 TRACE(("might send data, flushing"))
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	326 if (channel->readfd >= 0 && channel->transwindow > 0) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	327 TRACE(("send data readfd"))
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	328 send_msg_channel_data(channel, 0);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	329 }
439 ab370c629d36 Fix a stupid bug s/readfd/errfd/ affecting channel close on child exit Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	330 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	331 && channel->transwindow > 0) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	332 TRACE(("send data errfd"))
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	333 send_msg_channel_data(channel, 1);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	334 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	335 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	336
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	337 /* If we're not going to send any more data, send EOF */
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	338 if (!channel->sent_eof
365 49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	339 && channel->readfd == FD_CLOSED
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	340 && (ERRFD_IS_WRITE(channel) \|\| channel->errfd == FD_CLOSED)) {
397 2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' Matt Johnston <matt@ucc.asn.au> parents: 396 diff changeset	341 send_msg_channel_eof(channel);
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' Matt Johnston <matt@ucc.asn.au> parents: 396 diff changeset	342 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	344 /* And if we can't receive any more data from them either, close up */
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	345 if (channel->readfd == FD_CLOSED
815 35183e8a7851 Improve EOF handling for half-close. Patch from Catalin Patulea Matt Johnston <matt@ucc.asn.au> parents: 770 diff changeset	346 && channel->writefd == FD_CLOSED
423 b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched. Matt Johnston <matt@ucc.asn.au> parents: 416 diff changeset	347 && (ERRFD_IS_WRITE(channel) \|\| channel->errfd == FD_CLOSED)
467 0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	348 && !channel->sent_close
0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status Matt Johnston <matt@ucc.asn.au> parents: 449 diff changeset	349 && close_allowed
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	350 && !write_pending(channel)) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	351 TRACE(("sending close, readfd is closed"))
397 2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' Matt Johnston <matt@ucc.asn.au> parents: 396 diff changeset	352 send_msg_channel_close(channel);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 * it is important that the channel reference isn't used after a call to this
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 * function */
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	360 void channel_connect_done(int result, int sock, void* user_data, const char* UNUSED(errstring)) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	361
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	362 struct Channel *channel = user_data;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	364 TRACE(("enter channel_connect_done"))
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	365
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	366 if (result == DROPBEAR_SUCCESS)
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	367 {
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	368 channel->readfd = channel->writefd = sock;
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	369 channel->conn_pending = NULL;
70 b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	370 send_msg_channel_open_confirmation(channel, channel->recvwindow,
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	371 channel->recvmaxpacket);
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	372 TRACE(("leave channel_connect_done: success"))
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	373 }
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	374 else
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	375 {
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	376 send_msg_channel_open_failure(channel->remotechan,
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	377 SSH_OPEN_CONNECT_FAILED, "", "");
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	378 remove_channel(channel);
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	379 TRACE(("leave check_in_progress: fail"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	380 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	381 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	382
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384 /* Send the close message and set the channel as closed */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 static void send_msg_channel_close(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	386
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 970 diff changeset	387 TRACE(("enter send_msg_channel_close %p", (void*)channel))
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	388 if (channel->type->closehandler
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	389 && !channel->close_handler_done) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 channel->type->closehandler(channel);
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	391 channel->close_handler_done = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	401 channel->sent_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	402 channel->sent_close = 1;
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	403 close_chan_fd(channel, channel->readfd, SHUT_RD);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	404 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	405 close_chan_fd(channel, channel->writefd, SHUT_WR);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	406 TRACE(("leave send_msg_channel_close"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409 /* call this when trans/eof channels are closed */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 static void send_msg_channel_eof(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	412 TRACE(("enter send_msg_channel_eof"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	420 channel->sent_eof = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	422 TRACE(("leave send_msg_channel_eof"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	423 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	424
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	425 #ifndef HAVE_WRITEV
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	426 static int writechannel_fallback(struct Channel* channel, int fd, circbuffer *cbuf,
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	427 const unsigned char UNUSED(moredata), unsigned int morelen) {
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	428
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	429 unsigned char circ_p1, circ_p2;
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	430 unsigned int circ_len1, circ_len2;
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	431 ssize_t written;
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	432
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	433 if (morelen) {
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	434 /* fallback doesn't consume moredata */
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	435 *morelen = 0;
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	436 }
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	437
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	438 /* Write the first portion of the circular buffer */
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	439 cbuf_readptrs(cbuf, &circ_p1, &circ_len1, &circ_p2, &circ_len2);
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	440 written = write(fd, circ_p1, circ_len1);
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	441 if (written < 0) {
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	442 if (errno != EINTR && errno != EAGAIN) {
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	443 TRACE(("channel IO write error fd %d %s", fd, strerror(errno)))
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	444 close_chan_fd(channel, fd, SHUT_WR);
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	445 return DROPBEAR_FAILURE;
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	446 }
1192 af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	447 } else {
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	448 cbuf_incrread(cbuf, written);
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	449 channel->recvdonelen += written;
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	450 }
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	451 return DROPBEAR_SUCCESS;
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	452 }
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	453 #endif /* !HAVE_WRITEV */
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	454
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	455 #ifdef HAVE_WRITEV
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	456 static int writechannel_writev(struct Channel* channel, int fd, circbuffer *cbuf,
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	457 const unsigned char moredata, unsigned int morelen) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	458
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	459 struct iovec iov[3];
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	460 unsigned char circ_p1, circ_p2;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	461 unsigned int circ_len1, circ_len2;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	462 int io_count = 0;
1192 af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	463
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	464 ssize_t written;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	465
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	466 cbuf_readptrs(cbuf, &circ_p1, &circ_len1, &circ_p2, &circ_len2);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	467
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	468 if (circ_len1 > 0) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	469 TRACE(("circ1 %d", circ_len1))
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	470 iov[io_count].iov_base = circ_p1;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	471 iov[io_count].iov_len = circ_len1;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	472 io_count++;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	473 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	474
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	475 if (circ_len2 > 0) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	476 TRACE(("circ2 %d", circ_len2))
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	477 iov[io_count].iov_base = circ_p2;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	478 iov[io_count].iov_len = circ_len2;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	479 io_count++;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	480 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	481
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	482 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	483 assert(moredata);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	484 TRACE(("more %d", *morelen))
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	485 iov[io_count].iov_base = (void*)moredata;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	486 iov[io_count].iov_len = *morelen;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	487 io_count++;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	488 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	489
1075 cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	490 if (io_count == 0) {
cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	491 /* writechannel may sometimes be called twice in a main loop iteration.
cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	492 From common_recv_msg_channel_data() then channelio().
cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	493 The second call may not have any data to write, so we just return. */
cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	494 TRACE(("leave writechannel, no data"))
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	495 return DROPBEAR_SUCCESS;
1075 cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	496 }
cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	497
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	498 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	499 /* Default return value, none consumed */
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	500 *morelen = 0;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	501 }
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	502
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	503 written = writev(fd, iov, io_count);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	504
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	505 if (written < 0) {
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	506 if (errno != EINTR && errno != EAGAIN) {
1075 cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	507 TRACE(("channel IO write error fd %d %s", fd, strerror(errno)))
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	508 close_chan_fd(channel, fd, SHUT_WR);
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	509 return DROPBEAR_FAILURE;
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	510 }
1192 af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	511 } else {
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	512 int cbuf_written = MIN(circ_len1+circ_len2, (unsigned int)written);
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	513 cbuf_incrread(cbuf, cbuf_written);
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	514 if (morelen) {
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	515 *morelen = written - cbuf_written;
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	516 }
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close" Matt Johnston <matt@ucc.asn.au> parents: 1191 diff changeset	517 channel->recvdonelen += written;
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	518 }
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	519 return DROPBEAR_SUCCESS;
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	520 }
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	521 #endif /* HAVE_WRITEV */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	522
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	523 /* Called to write data out to the local side of the channel.
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	524 Writes the circular buffer contents and also the "moredata" buffer
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	525 if not null. Will ignore EAGAIN.
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	526 Returns DROPBEAR_FAILURE if writing to fd had an error and the channel is being closed, DROPBEAR_SUCCESS otherwise */
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	527 static int writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	528 const unsigned char moredata, unsigned int morelen) {
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	529 int ret = DROPBEAR_SUCCESS;
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	530 TRACE(("enter writechannel fd %d", fd))
acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	531 #ifdef HAVE_WRITEV
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	532 ret = writechannel_writev(channel, fd, cbuf, moredata, morelen);
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	533 #else
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	534 ret = writechannel_fallback(channel, fd, cbuf, moredata, morelen);
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	535 #endif
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	536
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	537 /* Window adjust handling */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	538 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	539 send_msg_channel_window_adjust(channel, channel->recvdonelen);
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	540 channel->recvwindow += channel->recvdonelen;
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	541 channel->recvdonelen = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	542 }
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	543
449 3e6c536bc023 Add -W <windowsize> argument and document it. Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	544 dropbear_assert(channel->recvwindow <= opts.recv_window);
709 abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 707 diff changeset	545 dropbear_assert(channel->recvwindow <= cbuf_getavail(channel->writebuf));
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 221 diff changeset	546 dropbear_assert(channel->extrabuf == NULL \|\|
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	547 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	548
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	549 TRACE(("leave writechannel"))
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	550 return ret;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1075 diff changeset	553
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	554 /* Set the file descriptors for the main select in session.c
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	555 * This avoid channels which don't have any window available, are closed, etc*/
1074 10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1072 diff changeset	556 void setchannelfds(fd_set readfds, fd_set writefds, int allow_reads) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	557
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	558 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	559 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	560
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	561 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	562
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	563 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	564 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	565 continue;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	566 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	567
896 a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	568 /* Stuff to put over the wire.
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	569 Avoid queueing data to send if we're in the middle of a
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	570 key re-exchange (!dataallowed), but still read from the
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	571 FD if there's the possibility of "~."" to kill an
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	572 interactive session (the read_mangler) */
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 815 diff changeset	573 if (channel->transwindow > 0
1074 10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1072 diff changeset	574 && ((ses.dataallowed && allow_reads) \|\| channel->read_mangler)) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	575
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	576 if (channel->readfd >= 0) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	577 FD_SET(channel->readfd, readfds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	578 }
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	579
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	580 if (ERRFD_IS_READ(channel) && channel->errfd >= 0) {
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	581 FD_SET(channel->errfd, readfds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	582 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	583 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	584
397 2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' Matt Johnston <matt@ucc.asn.au> parents: 396 diff changeset	585 /* Stuff from the wire */
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	586 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	587 FD_SET(channel->writefd, writefds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	588 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	589
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 423 diff changeset	590 if (ERRFD_IS_WRITE(channel) && channel->errfd >= 0
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	591 && cbuf_getused(channel->extrabuf) > 0) {
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	592 FD_SET(channel->errfd, writefds);
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	593 }
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	594
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	595 } /* foreach channel */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	596
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1192 diff changeset	597 #if DROPBEAR_LISTENERS
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	598 set_listener_fds(readfds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	599 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	600
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	601 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	602
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	603 /* handle the channel EOF event, by closing the channel filedescriptor. The
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	604 * channel isn't closed yet, it is left until the incoming (from the program
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	605 * etc) FD is also EOF */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	606 void recv_msg_channel_eof() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	607
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	608 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	609
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	610 TRACE(("enter recv_msg_channel_eof"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	611
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	612 channel = getchannel_msg("EOF");
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	613
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	614 channel->recv_eof = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	615
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	616 check_close(channel);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	617 TRACE(("leave recv_msg_channel_eof"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	618 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	619
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	620
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	621 /* Handle channel closure(), respond in kind and close the channels */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	622 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	623
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	624 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	625
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	626 TRACE(("enter recv_msg_channel_close"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	627
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	628 channel = getchannel_msg("Close");
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	629
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	630 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	631 channel->recv_close = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	632
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	633 check_close(channel);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	634 TRACE(("leave recv_msg_channel_close"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	635 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	636
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	637 /* Remove a channel entry, this is only executed after both sides have sent
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	638 * channel close */
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	639 static void remove_channel(struct Channel * channel) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	640
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	641 TRACE(("enter remove_channel"))
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	642 TRACE(("channel index is %d", channel->index))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	643
709 abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 707 diff changeset	644 cbuf_free(channel->writebuf);
abd99ecd7ec2 use an empty writebuf rather than a NULL one Matt Johnston <matt@ucc.asn.au> parents: 707 diff changeset	645 channel->writebuf = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	646
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	647 if (channel->extrabuf) {
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	648 cbuf_free(channel->extrabuf);
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	649 channel->extrabuf = NULL;
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	650 }
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	651
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	652
938 c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	653 if (IS_DROPBEAR_SERVER \|\| (channel->writefd != STDOUT_FILENO)) {
c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	654 /* close the FDs in case they haven't been done
c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	655 * yet (they might have been shutdown etc) */
c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	656 TRACE(("CLOSE writefd %d", channel->writefd))
1039 d0e6dd5af46e Use m_close() which will avoid close(-1) Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	657 m_close(channel->writefd);
938 c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	658 TRACE(("CLOSE readfd %d", channel->readfd))
1039 d0e6dd5af46e Use m_close() which will avoid close(-1) Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	659 m_close(channel->readfd);
938 c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	660 TRACE(("CLOSE errfd %d", channel->errfd))
1039 d0e6dd5af46e Use m_close() which will avoid close(-1) Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	661 m_close(channel->errfd);
938 c88dce72f6d2 Make sure client exit messages don't get lost Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	662 }
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	663
770 7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	664 if (!channel->close_handler_done
7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	665 && channel->type->closehandler) {
7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	666 channel->type->closehandler(channel);
7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	667 channel->close_handler_done = 1;
7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	668 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	669
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	670 if (channel->conn_pending) {
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	671 cancel_connect(channel->conn_pending);
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	672 }
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	673
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	674 ses.channels[channel->index] = NULL;
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	675 m_free(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	676 ses.chancount--;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	677
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	678 update_channel_prio();
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	679
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	680 TRACE(("leave remove_channel"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	681 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	682
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	683 /* Handle channel specific requests, passing off to corresponding handlers
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	684 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	685 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	686
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	687 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	688
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	689 channel = getchannel();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	690
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 970 diff changeset	691 TRACE(("enter recv_msg_channel_request %p", (void*)channel))
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	692
495 cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have Matt Johnston <matt@ucc.asn.au> parents: 467 diff changeset	693 if (channel->sent_close) {
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have Matt Johnston <matt@ucc.asn.au> parents: 467 diff changeset	694 TRACE(("leave recv_msg_channel_request: already closed channel"))
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have Matt Johnston <matt@ucc.asn.au> parents: 467 diff changeset	695 return;
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have Matt Johnston <matt@ucc.asn.au> parents: 467 diff changeset	696 }
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have Matt Johnston <matt@ucc.asn.au> parents: 467 diff changeset	697
652 17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	698 if (channel->type->reqhandler
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	699 && !channel->close_handler_done) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	700 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	701 } else {
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	702 int wantreply;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	703 buf_eatstring(ses.payload);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	704 wantreply = buf_getbool(ses.payload);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	705 if (wantreply) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	706 send_msg_channel_failure(channel);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	707 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	708 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	709
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	710 TRACE(("leave recv_msg_channel_request"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	711
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	712 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	713
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	714 /* Reads data from the server's program/shell/etc, and puts it in a
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	715 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	716 * chan is the remote channel, isextended is 0 if it is normal data, 1
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	717 * if it is extended data. if it is extended, then the type is in
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	718 * exttype */
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	719 static void send_msg_channel_data(struct Channel *channel, int isextended) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	720
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	721 int len;
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	722 size_t maxlen, size_pos;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	723 int fd;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	724
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	725 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	726
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	727 TRACE(("enter send_msg_channel_data"))
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	728 dropbear_assert(!channel->sent_close);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	729
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	730 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	731 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	732 } else {
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	733 fd = channel->readfd;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	734 }
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	735 TRACE(("enter send_msg_channel_data isextended %d fd %d", isextended, fd))
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 221 diff changeset	736 dropbear_assert(fd >= 0);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	737
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	738 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	739 /* -(1+4+4) is SSH_MSG_CHANNEL_DATA, channel number, string length, and
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	740 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	741 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	742 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
770 7577a3afc42d run closehandlers on cleanup Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	743 TRACE(("maxlen %zd", maxlen))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	744 if (maxlen == 0) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	745 TRACE(("leave send_msg_channel_data: no window"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	746 return;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	747 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	748
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	749 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	750 isextended ? SSH_MSG_CHANNEL_EXTENDED_DATA : SSH_MSG_CHANNEL_DATA);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	751 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	752 if (isextended) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	753 buf_putint(ses.writepayload, SSH_EXTENDED_DATA_STDERR);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	754 }
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	755 /* a dummy size first ...*/
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	756 size_pos = ses.writepayload->pos;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	757 buf_putint(ses.writepayload, 0);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	758
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	759 /* read the data */
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	760 len = read(fd, buf_getwriteptr(ses.writepayload, maxlen), maxlen);
722 4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	761
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	762 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	763 if (len == 0 \|\| errno != EINTR) {
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	764 /* This will also get hit in the case of EAGAIN. The only
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	765 time we expect to receive EAGAIN is when we're flushing a FD,
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	766 in which case it can be treated the same as EOF */
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	767 close_chan_fd(channel, fd, SHUT_RD);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	768 }
722 4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	769 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	770 buf_setlen(ses.writepayload, 0);
423 b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched. Matt Johnston <matt@ucc.asn.au> parents: 416 diff changeset	771 TRACE(("leave send_msg_channel_data: len %d read err %d or EOF for fd %d",
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched. Matt Johnston <matt@ucc.asn.au> parents: 416 diff changeset	772 len, errno, fd))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	773 return;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	774 }
673 c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD Matt Johnston <matt@ucc.asn.au> parents: 652 diff changeset	775
722 4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	776 if (channel->read_mangler) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	777 channel->read_mangler(channel, buf_getwriteptr(ses.writepayload, len), &len);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	778 if (len == 0) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	779 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	780 buf_setlen(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	781 return;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	782 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	783 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient Matt Johnston <matt@ucc.asn.au> parents: 709 diff changeset	784
673 c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD Matt Johnston <matt@ucc.asn.au> parents: 652 diff changeset	785 TRACE(("send_msg_channel_data: len %d fd %d", len, fd))
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	786 buf_incrwritepos(ses.writepayload, len);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	787 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	788 buf_setpos(ses.writepayload, size_pos);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	789 buf_putint(ses.writepayload, len);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	790
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	791 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	792
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	793 encrypt_packet();
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	794
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	795 /* If we receive less data than we requested when flushing, we've
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	796 reached the equivalent of EOF */
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 423 diff changeset	797 if (channel->flushing && len < (ssize_t)maxlen)
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	798 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	799 TRACE(("closing from channel, flushing out."))
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	800 close_chan_fd(channel, fd, SHUT_RD);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 415 diff changeset	801 }
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	802 TRACE(("leave send_msg_channel_data"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	803 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	804
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	805 /* We receive channel data */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	806 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	807
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	808 struct Channel *channel;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	809
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	810 channel = getchannel();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	811
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	812 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	813 }
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	814
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	815 /* Shared for data and stderr data - when we receive data, put it in a buffer
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	816 * for writing to the local file descriptor */
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	817 void common_recv_msg_channel_data(struct Channel *channel, int fd,
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	818 circbuffer * cbuf) {
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	819
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	820 unsigned int datalen;
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	821 unsigned int maxdata;
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	822 unsigned int buflen;
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	823 unsigned int len;
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	824 unsigned int consumed;
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	825 int res;
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	826
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	827 TRACE(("enter recv_msg_channel_data"))
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	828
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	829 if (channel->recv_eof) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 513 diff changeset	830 dropbear_exit("Received data after eof");
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	831 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	832
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	833 if (fd < 0 \|\| !cbuf) {
365 49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	834 /* If we have encountered failed write, the far side might still
49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	835 * be sending data without having yet received our close notification.
49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	836 * We just drop the data. */
49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	837 return;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	838 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	839
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	840 datalen = buf_getint(ses.payload);
365 49fcc9875045 Remove accidentally removed block (making sure to close the channel). Matt Johnston <matt@ucc.asn.au> parents: 364 diff changeset	841 TRACE(("length %d", datalen))
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	842
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	843 maxdata = cbuf_getavail(cbuf);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	844
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	845 /* Whilst the spec says we "MAY ignore data past the end" this could
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	846 * lead to corrupted file transfers etc (chunks missed etc). It's better to
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	847 * just die horribly */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	848 if (datalen > maxdata) {
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	849 dropbear_exit("Oversized packet");
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	850 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	851
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	852 dropbear_assert(channel->recvwindow >= datalen);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	853 channel->recvwindow -= datalen;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	854 dropbear_assert(channel->recvwindow <= opts.recv_window);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	855
1075 cc6116cc0b5c Avoid channel writev() when there is nothing to write Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	856 /* Attempt to write the data immediately without having to put it in the circular buffer */
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	857 consumed = datalen;
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	858 res = writechannel(channel, fd, cbuf, buf_getptr(ses.payload, datalen), &consumed);
1054 c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	859
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	860 datalen -= consumed;
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	861 buf_incrpos(ses.payload, consumed);
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	862
c71df09bc610 Avoid copying data into circular buffer Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	863
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	864 /* We may have to run throught twice, if the buffer wraps around. Can't
d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	865 * just "leave it for next time" like with writechannel, since this
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	866 * is payload data.
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	867 * If the writechannel() failed then remaining data is discarded */
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	868 if (res == DROPBEAR_SUCCESS) {
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	869 len = datalen;
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	870 while (len > 0) {
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	871 buflen = cbuf_writelen(cbuf);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	872 buflen = MIN(buflen, len);
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	873
1168 509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	874 memcpy(cbuf_writeptr(cbuf, buflen),
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	875 buf_getptr(ses.payload, buflen), buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	876 cbuf_incrwrite(cbuf, buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	877 buf_incrpos(ses.payload, buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	878 len -= buflen;
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close Matt Johnston <matt@ucc.asn.au> parents: 1166 diff changeset	879 }
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	880 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	881
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	882 TRACE(("leave recv_msg_channel_data"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	883 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	884
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	885 /* Increment the outgoing data window for a channel - the remote end limits
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	886 * the amount of data which may be transmitted, this window is decremented
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	887 * as data is sent, and incremented upon receiving window-adjust messages */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	888 void recv_msg_channel_window_adjust() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	889
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	890 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	891 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	892
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	893 channel = getchannel();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	894
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	895 incr = buf_getint(ses.payload);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	896 TRACE(("received window increment %d", incr))
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 439 diff changeset	897 incr = MIN(incr, TRANS_MAX_WIN_INCR);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	898
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	899 channel->transwindow += incr;
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 439 diff changeset	900 channel->transwindow = MIN(channel->transwindow, TRANS_MAX_WINDOW);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	901
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	902 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	903
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	904 /* Increment the incoming data window for a channel, and let the remote
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	905 * end know */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	906 static void send_msg_channel_window_adjust(const struct Channel* channel,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	907 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	908
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	909 TRACE(("sending window adjust %d", incr))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	910 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	911
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	912 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_WINDOW_ADJUST);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	913 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	914 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	915
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	916 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	917 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	918
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	919 /* Handle a new channel request, performing any channel-type-specific setup */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	920 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	921
1094 c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign] Gaël PORTAY <gael.portay@gmail.com> parents: 1079 diff changeset	922 char *type;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	923 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	924 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	925 struct Channel *channel;
7 425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	926 const struct ChanType **cp;
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	927 const struct ChanType *chantype;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	928 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	929 int ret;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	930
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	931
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	932 TRACE(("enter recv_msg_channel_open"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	933
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	934 /* get the packet contents */
1122 aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings Matt Johnston <matt@ucc.asn.au> parents: 1098 diff changeset	935 type = buf_getstring(ses.payload, &typelen);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	936
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	937 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	938 transwindow = buf_getint(ses.payload);
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 439 diff changeset	939 transwindow = MIN(transwindow, TRANS_MAX_WINDOW);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	940 transmaxpacket = buf_getint(ses.payload);
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 439 diff changeset	941 transmaxpacket = MIN(transmaxpacket, TRANS_MAX_PAYLOAD_LEN);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	942
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	943 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	944 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	945 goto failure;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	946 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	947
7 425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	948 /* Get the channel type. Client and server style invokation will set up a
425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	949 * different list for ses.chantypes at startup. We just iterate through
425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	950 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	951 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	952 chantype != NULL;
425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	953 cp++, chantype = (*cp)) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	954 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	955 break;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	956 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	957 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	958
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	959 if (chantype == NULL) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	960 TRACE(("No matching type for '%s'", type))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	961 goto failure;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	962 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	963
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	964 TRACE(("matched type '%s'", type))
7 425ed5c20157 Chantype handling is sorted Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	965
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	966 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	967 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	968
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	969 if (channel == NULL) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	970 TRACE(("newchannel returned NULL"))
1166 b0f351edf370 Send SSH_OPEN_RESOURCE_SHORTAGE response when too many channels open Matt Johnston <matt@ucc.asn.au> parents: 1165 diff changeset	971 errtype = SSH_OPEN_RESOURCE_SHORTAGE;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	972 goto failure;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	973 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	974
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	975 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	976 ret = channel->type->inithandler(channel);
362 1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	977 if (ret == SSH_OPEN_IN_PROGRESS) {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	978 /* We'll send the confirmation later */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	979 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work. Matt Johnston <matt@ucc.asn.au> parents: 359 diff changeset	980 }
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	981 if (ret > 0) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	982 errtype = ret;
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	983 remove_channel(channel);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	984 TRACE(("inithandler returned failure %d", ret))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	985 goto failure;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	986 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	987 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	988
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	989 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	990 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	991 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	992
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	993 /* success */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	994 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	995 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	996 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	997
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	998 failure:
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	999 TRACE(("recv_msg_channel_open failure"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1000 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1001
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1002 cleanup:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1003 m_free(type);
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1004
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1005 update_channel_prio();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1006
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1007 TRACE(("leave recv_msg_channel_open"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1008 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1009
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1010 /* Send a failure message */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	1011 void send_msg_channel_failure(const struct Channel *channel) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1012
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1013 TRACE(("enter send_msg_channel_failure"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1014 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1015
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1016 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1017 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1018
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1019 encrypt_packet();
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1020 TRACE(("leave send_msg_channel_failure"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1021 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1022
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1023 /* Send a success message */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	1024 void send_msg_channel_success(const struct Channel *channel) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1025
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1026 TRACE(("enter send_msg_channel_success"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1027 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1028
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1029 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1030 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1031
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1032 encrypt_packet();
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1033 TRACE(("leave send_msg_channel_success"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1034 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1035
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1036 /* Send a channel open failure message, with a corresponding reason
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1037 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1038 static void send_msg_channel_open_failure(unsigned int remotechan,
1098 f95b6e87cd0c Turn send_msg_channel_open_failure()'s text and lang into const char * Gaël PORTAY <gael.portay@gmail.com> parents: 1097 diff changeset	1039 int reason, const char text, const char lang) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1040
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1041 TRACE(("enter send_msg_channel_open_failure"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1042 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1043
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1044 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1045 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1046 buf_putint(ses.writepayload, reason);
1122 aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings Matt Johnston <matt@ucc.asn.au> parents: 1098 diff changeset	1047 buf_putstring(ses.writepayload, text, strlen(text));
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings Matt Johnston <matt@ucc.asn.au> parents: 1098 diff changeset	1048 buf_putstring(ses.writepayload, lang, strlen(lang));
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1049
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1050 encrypt_packet();
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1051 TRACE(("leave send_msg_channel_open_failure"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1052 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1053
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1054 /* Confirm a channel open, and let the remote end know what number we've
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1055 * allocated and the receive parameters */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	1056 static void send_msg_channel_open_confirmation(const struct Channel* channel,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1057 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1058 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1059
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1060 TRACE(("enter send_msg_channel_open_confirmation"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1061 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1062
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1063 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1064 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1065 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1066 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1067 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1068
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1069 encrypt_packet();
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1070 TRACE(("leave send_msg_channel_open_confirmation"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1071 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1072
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1073 /* close a fd, how is SHUT_RD or SHUT_WR */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1074 static void close_chan_fd(struct Channel *channel, int fd, int how) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1075
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1076 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1077
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1078 if (channel->type->sepfds) {
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1079 TRACE(("SHUTDOWN(%d, %d)", fd, how))
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1080 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1081 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1082 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1083 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1084 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1085 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1086 } else {
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1087 TRACE(("CLOSE some fd %d", fd))
1039 d0e6dd5af46e Use m_close() which will avoid close(-1) Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	1088 m_close(fd);
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1089 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1090 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1091
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1092 if (closeout && (fd == channel->readfd)) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1093 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1094 }
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1095 if (closeout && ERRFD_IS_READ(channel) && (fd == channel->errfd)) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1096 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1097 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1098
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1099 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1100 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1101 }
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1102 if (closein && ERRFD_IS_WRITE(channel) && (fd == channel->errfd)) {
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1103 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1104 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1105
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1106 /* if we called shutdown on it and all references are gone, then we
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1107 * need to close() it to stop it lingering */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1108 if (channel->type->sepfds && channel->readfd == FD_CLOSED
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1109 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375 8d149b812669 - Add some extra tracing. Matt Johnston <matt@ucc.asn.au> parents: 365 diff changeset	1110 TRACE(("CLOSE (finally) of %d", fd))
1039 d0e6dd5af46e Use m_close() which will avoid close(-1) Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	1111 m_close(fd);
363 6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1112 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1113 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1114
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling Matt Johnston <matt@ucc.asn.au> parents: 362 diff changeset	1115
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1192 diff changeset	1116 #if (DROPBEAR_LISTENERS) \|\| (DROPBEAR_CLIENT)
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1117 /* Create a new channel, and start the open request. This is intended
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1118 * for X11, agent, tcp forwarding, and should be filled with channel-specific
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1119 * options, with the calling function calling encrypt_packet() after
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1120 * completion. It is mandatory for the caller to encrypt_packet() if
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1121 * a channel is returned. NULL is returned on failure. */
9 7f77962de998 - Reworked non-channel fd handling to listener.c Matt Johnston <matt@ucc.asn.au> parents: 7 diff changeset	1122 int send_msg_channel_open_init(int fd, const struct ChanType *type) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1123
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1124 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1125
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1126 TRACE(("enter send_msg_channel_open_init()"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1127 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1128 if (!chan) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1129 TRACE(("leave send_msg_channel_open_init() - FAILED in newchannel()"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1130 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1131 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1132
707 564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	1133 /* Outbound opened channels don't make use of in-progress connections,
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	1134 * we can set it up straight away */
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection. Matt Johnston <matt@ucc.asn.au> parents: 673 diff changeset	1135
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1136 /* set fd non-blocking */
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	1137 setnonblocking(fd);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1138
253 84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion Matt Johnston <matt@ucc.asn.au> parents: 243 diff changeset	1139 chan->writefd = chan->readfd = fd;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1140 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1141
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1142 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1143
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1144 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1145 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1146
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1147 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
1122 aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings Matt Johnston <matt@ucc.asn.au> parents: 1098 diff changeset	1148 buf_putstring(ses.writepayload, type->name, strlen(type->name));
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1149 buf_putint(ses.writepayload, chan->index);
449 3e6c536bc023 Add -W <windowsize> argument and document it. Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	1150 buf_putint(ses.writepayload, opts.recv_window);
906 4696755c4cac A few fixes for cases where compression increases payload sizes, and Matt Johnston <matt@ucc.asn.au> parents: 896 diff changeset	1151 buf_putint(ses.writepayload, RECV_MAX_CHANNEL_DATA_LEN);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1152
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1153 TRACE(("leave send_msg_channel_open_init()"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1154 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1155 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1156
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1157 /* Confirmation that our channel open request (for forwardings) was
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1158 * successful*/
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1159 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1160
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1161 struct Channel * channel;
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1162 int ret;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1163
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1164 TRACE(("enter recv_msg_channel_open_confirmation"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1165
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	1166 channel = getchannel();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1167
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1168 if (!channel->await_open) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 513 diff changeset	1169 dropbear_exit("Unexpected channel reply");
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1170 }
0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1171 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1172
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1173 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1174 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1175 channel->transmaxpacket = buf_getint(ses.payload);
13 db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah) Matt Johnston <matt@ucc.asn.au> parents: 9 diff changeset	1176
187 c44df7123b0a compile fix when TRACE debugging is enabled Matt Johnston <matt@ucc.asn.au> parents: 179 diff changeset	1177 TRACE(("new chan remote %d local %d",
c44df7123b0a compile fix when TRACE debugging is enabled Matt Johnston <matt@ucc.asn.au> parents: 179 diff changeset	1178 channel->remotechan, channel->index))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1179
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1180 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1181 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1182 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1183 if (ret > 0) {
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	1184 remove_channel(channel);
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1185 TRACE(("inithandler returned failure %d", ret))
944 2e402a09e21e Avoid use-after-free when channel inithandler fails. Thanks to Coverity Matt Johnston <matt@ucc.asn.au> parents: 941 diff changeset	1186 return;
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1187 }
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1188 }
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 13 diff changeset	1189
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1190 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1191 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1192 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 938 diff changeset	1193 update_channel_prio();
13 db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah) Matt Johnston <matt@ucc.asn.au> parents: 9 diff changeset	1194
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	1195 TRACE(("leave recv_msg_channel_open_confirmation"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1196 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1197
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1198 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1199 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1200
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1201 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1202
179 161557a9dde8 * fix longstanding bug with connections being closed on failure to Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	1203 channel = getchannel();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1204
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1205 if (!channel->await_open) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 513 diff changeset	1206 dropbear_exit("Unexpected channel reply");
243 0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1207 }
0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1208 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	1209
359 78518751cb82 just shuffle some variables names about, a brief comment Matt Johnston <matt@ucc.asn.au> parents: 332 diff changeset	1210 remove_channel(channel);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1211 }
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1192 diff changeset	1212 #endif /* DROPBEAR_LISTENERS */
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1213
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1214 void send_msg_request_success() {
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1215 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1216 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS);
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1217 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1218 }
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1219
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1220 void send_msg_request_failure() {
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1221 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1222 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_FAILURE);
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1223 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	1224 }
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1225
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1226 struct Channel* get_any_ready_channel() {
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 970 diff changeset	1227 size_t i;
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1228 if (ses.chancount == 0) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1229 return NULL;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1230 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1231 for (i = 0; i < ses.chansize; i++) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1232 struct Channel *chan = ses.channels[i];
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1233 if (chan
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1234 && !(chan->sent_eof \|\| chan->recv_eof)
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	1235 && !(chan->await_open)) {
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1236 return chan;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1237 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1238 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1239 return NULL;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1240 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1241
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	1242 void start_send_channel_request(const struct Channel *channel,
06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1325 diff changeset	1243 const char *type) {
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1244
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1245 CHECKCLEARTOWRITE();
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1246 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1247 buf_putint(ses.writepayload, channel->remotechan);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1248
1122 aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings Matt Johnston <matt@ucc.asn.au> parents: 1098 diff changeset	1249 buf_putstring(ses.writepayload, type, strlen(type));
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1250
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 955 diff changeset	1251 }

Mercurial > dropbear

annotate common-channel.c @ 1526:36ab6b091ad3