dropbear: common-session.c annotate

annotate common-session.c @ 459:f4addc06745b

Make sure declarations of variables are at the top of function, pointed out by Alexey Rusakov.

author	Matt Johnston <matt@ucc.asn.au>
date	Tue, 11 Sep 2007 12:00:18 +0000
parents	7e43f5e473b9
children	e3db1f7a2e43

rev	line source
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 * Dropbear - a SSH2 server
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * Copyright (c) 2002,2003 Matt Johnston
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 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 #include "packet.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #include "algo.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 #include "buffer.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 #include "dss.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 #include "ssh.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 #include "random.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 #include "kex.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 #include "channel.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 #include "atomicio.h"
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	37 #include "runopts.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	39 static void checktimeouts();
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	40 static long select_timeout();
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	41 static int ident_readln(int fd, char* buf, int count);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	42
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	43 struct sshsession ses; /* GLOBAL */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 /* need to know if the session struct has been initialised, this way isn't the
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 * cleanest, but works OK */
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	47 int sessinitdone = 0; /* GLOBAL */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 /* this is set when we get SIGINT or SIGTERM, the handler is in main.c */
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	50 int exitflag = 0; /* GLOBAL */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	53
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54 /* called only at the start of a session, set up initial state */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	55 void common_session_init(int sock, char* remotehost) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	57 TRACE(("enter session_init"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	59 ses.remotehost = remotehost;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 ses.sock = sock;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62 ses.maxfd = sock;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	64 ses.connect_time = 0;
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	65 ses.last_packet_time = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	67 if (pipe(ses.signal_pipe) < 0) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	68 dropbear_exit("signal pipe failed");
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	69 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	70 setnonblocking(ses.signal_pipe[0]);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	71 setnonblocking(ses.signal_pipe[1]);
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	72
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	73 kexfirstinitialise(); /* initialise the kex state */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 416 diff changeset	75 ses.writepayload = buf_new(TRANS_MAX_PAYLOAD_LEN);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 ses.transseq = 0;
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.readbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 ses.decryptreadbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 ses.payload = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 ses.recvseq = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82
135 d663445c1533 Initialise the outgoing packet queue Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	83 initqueue(&ses.writequeue);
d663445c1533 Initialise the outgoing packet queue Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	84
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 21 diff changeset	85 ses.requirenext = SSH_MSG_KEXINIT;
452 4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	86 ses.dataallowed = 1; /* we can send data until we actually
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	87 send the SSH_MSG_KEXINIT */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88 ses.ignorenext = 0;
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	89 ses.lastpacket = 0;
452 4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	90 ses.reply_queue_head = NULL;
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	91 ses.reply_queue_tail = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 /* set all the algos to none */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 ses.keys = (struct key_context*)m_malloc(sizeof(struct key_context));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 ses.newkeys = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 ses.keys->recv_algo_crypt = &dropbear_nocipher;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 ses.keys->trans_algo_crypt = &dropbear_nocipher;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 ses.keys->recv_algo_mac = &dropbear_nohash;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 ses.keys->trans_algo_mac = &dropbear_nohash;
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 ses.keys->algo_kex = -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 ses.keys->algo_hostkey = -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 ses.keys->recv_algo_comp = DROPBEAR_COMP_NONE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 ses.keys->trans_algo_comp = DROPBEAR_COMP_NONE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 #ifndef DISABLE_ZLIB
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 ses.keys->recv_zstream = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 ses.keys->trans_zstream = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 /* key exchange buffers */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 ses.session_id = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 ses.kexhashbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 ses.transkexinit = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 ses.dh_K = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 ses.remoteident = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	119 ses.chantypes = NULL;
ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	120
21 d7cc5b484a2e - Port restriction code back in Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	121 ses.allowprivport = 0;
d7cc5b484a2e - Port restriction code back in Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	122
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	123 TRACE(("leave session_init"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	126 void session_loop(void(*loophandler)()) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	127
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	128 fd_set readfd, writefd;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	129 struct timeval timeout;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	130 int val;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	131
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	132 /* main loop, select()s for all sockets in use */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	133 for(;;) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	134
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	135 timeout.tv_sec = select_timeout();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	136 timeout.tv_usec = 0;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	137 FD_ZERO(&writefd);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	138 FD_ZERO(&readfd);
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	139 dropbear_assert(ses.payload == NULL);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	140 if (ses.sock != -1) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	141 FD_SET(ses.sock, &readfd);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	142 if (!isempty(&ses.writequeue)) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	143 FD_SET(ses.sock, &writefd);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	144 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	145 }
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	146
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	147 /* We get woken up when signal handlers write to this pipe.
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	148 SIGCHLD in svr-chansession is the only one currently. */
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	149 FD_SET(ses.signal_pipe[0], &readfd);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	150
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	151 /* set up for channels which require reading/writing */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	152 if (ses.dataallowed) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	153 setchannelfds(&readfd, &writefd);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	154 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	155 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	156
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	157 if (exitflag) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	158 dropbear_exit("Terminated by signal");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	159 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	160
373 70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	161 if (val < 0 && errno != EINTR) {
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	162 dropbear_exit("Error in select");
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	163 }
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	164
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	165 if (val <= 0) {
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	166 /* If we were interrupted or the select timed out, we still
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	167 * want to iterate over channels etc for reading, to handle
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	168 * server processes exiting etc.
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	169 * We don't want to read/write FDs. */
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	170 FD_ZERO(&writefd);
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	171 FD_ZERO(&readfd);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	172 }
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	173
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	174 /* We'll just empty out the pipe if required. We don't do
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	175 any thing with the data, since the pipe's purpose is purely to
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	176 wake up the select() above. */
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	177 if (FD_ISSET(ses.signal_pipe[0], &readfd)) {
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	178 char x;
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	179 while (read(ses.signal_pipe[0], &x, 1) > 0) {}
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	180 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	181
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	182 /* check for auth timeout, rekeying required etc */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	183 checktimeouts();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	184
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	185 /* process session socket's incoming/outgoing data */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	186 if (ses.sock != -1) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	187 if (FD_ISSET(ses.sock, &writefd) && !isempty(&ses.writequeue)) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	188 write_packet();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	189 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	190
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	191 if (FD_ISSET(ses.sock, &readfd)) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	192 read_packet();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	193 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	194
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	195 /* Process the decrypted packet. After this, the read buffer
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	196 * will be ready for a new packet */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	197 if (ses.payload != NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	198 process_packet();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	199 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	200 }
452 4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	201
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	202 /* if required, flush out any queued reply packets that
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	203 were being held up during a KEX */
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	204 maybe_flush_reply_queue();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	205
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	206 /* process pipes etc for the channels, ses.dataallowed == 0
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	207 * during rekeying ) */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	208 if (ses.dataallowed) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	209 channelio(&readfd, &writefd);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	210 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	211
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	212 if (loophandler) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	213 loophandler();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	214 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	215
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	216 } /* for(;;) */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	217
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	218 /* Not reached */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	219 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	220
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 /* clean up a session on exit */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 void common_session_cleanup() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	224 TRACE(("enter session_cleanup"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 /* we can't cleanup if we don't know the session state */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 if (!sessinitdone) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	228 TRACE(("leave session_cleanup: !sessinitdone"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 return;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 m_free(ses.session_id);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 m_burn(ses.keys, sizeof(struct key_context));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 m_free(ses.keys);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236 chancleanup();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	238 TRACE(("leave session_cleanup"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 void session_identification() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 /* max length of 255 chars */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 char linebuf[256];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 int len = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 char done = 0;
103 8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	248 int i;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 /* write our version string, this blocks */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 if (atomicio(write, ses.sock, LOCAL_IDENT "\r\n",
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 strlen(LOCAL_IDENT "\r\n")) == DROPBEAR_FAILURE) {
344 bf29e6659fb9 Just use the normal "remote closed" handler when reading ident stings Matt Johnston <matt@ucc.asn.au> parents: 275 diff changeset	253 ses.remoteclosed();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255
275 7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	256 /* If they send more than 50 lines, something is wrong */
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	257 for (i = 0; i < 50; i++) {
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 103 diff changeset	258 len = ident_readln(ses.sock, linebuf, sizeof(linebuf));
103 8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	259
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	260 if (len < 0 && errno != EINTR) {
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	261 /* It failed */
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	262 break;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	263 }
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	264
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	265 if (len >= 4 && memcmp(linebuf, "SSH-", 4) == 0) {
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	266 /* start of line matches */
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	267 done = 1;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	268 break;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	269 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 if (!done) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	273 TRACE(("err: %s for '%s'\n", strerror(errno), linebuf))
344 bf29e6659fb9 Just use the normal "remote closed" handler when reading ident stings Matt Johnston <matt@ucc.asn.au> parents: 275 diff changeset	274 ses.remoteclosed();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 } else {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 /* linebuf is already null terminated */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277 ses.remoteident = m_malloc(len);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 memcpy(ses.remoteident, linebuf, len);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280
275 7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	281 /* Shall assume that 2.x will be backwards compatible. */
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	282 if (strncmp(ses.remoteident, "SSH-2.", 6) != 0
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	283 && strncmp(ses.remoteident, "SSH-1.99-", 9) != 0) {
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	284 dropbear_exit("Incompatible remote version '%s'", ses.remoteident);
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	285 }
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	286
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	287 TRACE(("remoteident: %s", ses.remoteident))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 /* returns the length including null-terminating zero on success,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 * or -1 on failure */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 static int ident_readln(int fd, char* buf, int count) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 char in;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 int pos = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 int num = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 fd_set fds;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 struct timeval timeout;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	301 TRACE(("enter ident_readln"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 if (count < 1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307 FD_ZERO(&fds);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 /* select since it's a non-blocking fd */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 /* leave space to null-terminate */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 while (pos < count-1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 FD_SET(fd, &fds);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316 timeout.tv_sec = 1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 timeout.tv_usec = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318 if (select(fd+1, &fds, NULL, NULL, &timeout) < 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320 continue;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321 }
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	322 TRACE(("leave ident_readln: select error"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 checktimeouts();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328 /* Have to go one byte at a time, since we don't want to read past
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 * the end, and have to somehow shove bytes back into the normal
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330 * packet reader */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 if (FD_ISSET(fd, &fds)) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332 num = read(fd, &in, 1);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	333 /* a "\n" is a newline, "\r" we want to read in and keep going
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	334 * so that it won't be read as part of the next line */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	335 if (num < 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336 /* error */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	338 continue; /* not a real error */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	339 }
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	340 TRACE(("leave ident_readln: read error"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	341 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	342 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343 if (num == 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	344 /* EOF */
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	345 TRACE(("leave ident_readln: EOF"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	346 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 if (in == '\n') {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	349 /* end of ident string */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	350 break;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	351 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352 /* we don't want to include '\r's */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353 if (in != '\r') {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 buf[pos] = in;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355 pos++;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360 buf[pos] = '\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: 135 diff changeset	361 TRACE(("leave ident_readln: return %d", pos+1))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	362 return pos+1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	364
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	365 void send_msg_ignore() {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	366 CHECKCLEARTOWRITE();
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	367 buf_putbyte(ses.writepayload, SSH_MSG_IGNORE);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	368 buf_putstring(ses.writepayload, "", 0);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	369 encrypt_packet();
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	370 }
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	371
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	372 /* Check all timeouts which are required. Currently these are the time for
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	373 * user authentication, and the automatic rekeying. */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	374 static void checktimeouts() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	375
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	376 time_t now;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	377
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	378 now = time(NULL);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	379
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	380 if (ses.connect_time != 0 && now - ses.connect_time >= AUTH_TIMEOUT) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	381 dropbear_close("Timeout before auth");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	382 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	383
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	384 /* we can't rekey if we haven't done remote ident exchange yet */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	385 if (ses.remoteident == NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	386 return;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	387 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	388
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	389 if (!ses.kexstate.sentkexinit
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	390 && (now - ses.kexstate.lastkextime >= KEX_REKEY_TIMEOUT
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	391 \|\| ses.kexstate.datarecv+ses.kexstate.datatrans >= KEX_REKEY_DATA)) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 135 diff changeset	392 TRACE(("rekeying after timeout or max data reached"))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	393 send_msg_kexinit();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	394 }
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	395
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	396 if (opts.keepalive_secs > 0
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	397 && now - ses.last_packet_time >= opts.keepalive_secs) {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	398 send_msg_ignore();
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	399 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	400 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	401
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	402 static long select_timeout() {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	403 /* determine the minimum timeout that might be required, so
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	404 as to avoid waking when unneccessary */
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	405 long ret = LONG_MAX;
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	406 if (KEX_REKEY_TIMEOUT > 0)
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	407 ret = MIN(KEX_REKEY_TIMEOUT, ret);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	408 if (AUTH_TIMEOUT > 0)
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	409 ret = MIN(AUTH_TIMEOUT, ret);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	410 if (opts.keepalive_secs > 0)
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	411 ret = MIN(opts.keepalive_secs, ret);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	412 return ret;
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	413 }

Mercurial > dropbear

annotate common-session.c @ 459:f4addc06745b