dropbear: common-session.c annotate

annotate common-session.c @ 1652:d2753238f35f

Added signature for changeset ebcdb893992d

author	Matt Johnston <matt@ucc.asn.au>
date	Wed, 27 Mar 2019 22:15:23 +0800
parents	aabde6f57fce
children	76189c9ffea2

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 *
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	4 * Copyright (c) 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 #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"
858 220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h Matt Johnston <matt@ucc.asn.au> parents: 857 diff changeset	33 #include "dbrandom.h"
4 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"
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	36 #include "runopts.h"
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: 1031 diff changeset	37 #include "netio.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38
1276 9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1191 diff changeset	39 static void checktimeouts(void);
9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1191 diff changeset	40 static long select_timeout(void);
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);
1276 9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1191 diff changeset	42 static void read_session_identification(void);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	43
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	44 struct sshsession ses; /* GLOBAL */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 /* called only at the start of a session, set up initial state */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 537 diff changeset	47 void common_session_init(int sock_in, int sock_out) {
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	48 time_t now;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1292 diff changeset	50 #if DEBUG_TRACE
1021 24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1020 diff changeset	51 debug_start_net();
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1020 diff changeset	52 #endif
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1020 diff changeset	53
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	54 TRACE(("enter session_init"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	56 ses.sock_in = sock_in;
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	57 ses.sock_out = sock_out;
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	58 ses.maxfd = MAX(sock_in, sock_out);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59
1074 10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	60 if (sock_in >= 0) {
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	61 setnonblocking(sock_in);
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	62 }
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	63 if (sock_out >= 0) {
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	64 setnonblocking(sock_out);
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	65 }
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	66
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	67 ses.socket_prio = DROPBEAR_PRIO_DEFAULT;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	68 /* Sets it to lowdelay */
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	69 update_channel_prio();
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	70
1634 aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	71 #if !DROPBEAR_SVR_MULTIUSER
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	72 /* A sanity check to prevent an accidental configuration option
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	73 leaving multiuser systems exposed */
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	74 errno = 0;
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	75 getuid();
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	76 if (errno != ENOSYS) {
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	77 dropbear_exit("Non-multiuser Dropbear requires a non-multiuser kernel");
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	78 }
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	79 #endif
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	80
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	81 now = monotonic_now();
1139 43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	82 ses.connect_time = now;
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	83 ses.last_packet_time_keepalive_recv = now;
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	84 ses.last_packet_time_idle = now;
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	85 ses.last_packet_time_any_sent = 0;
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	86 ses.last_packet_time_keepalive_sent = 0;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1546 diff changeset	88 #if DROPBEAR_FUZZ
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	89 if (!fuzz.fuzzing)
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	90 #endif
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	91 {
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	92 if (pipe(ses.signal_pipe) < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	93 dropbear_exit("Signal pipe failed");
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	94 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	95 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	96 setnonblocking(ses.signal_pipe[1]);
537 7de2f22ea759 - Add the signal pipe to maxfd Matt Johnston <matt@ucc.asn.au> parents: 534 diff changeset	97 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[0]);
7de2f22ea759 - Add the signal pipe to maxfd Matt Johnston <matt@ucc.asn.au> parents: 534 diff changeset	98 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[1]);
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	99 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	100
448 9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in Matt Johnston <matt@ucc.asn.au> parents: 416 diff changeset	101 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	102 ses.transseq = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 ses.readbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 ses.payload = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 ses.recvseq = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107
135 d663445c1533 Initialise the outgoing packet queue Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	108 initqueue(&ses.writequeue);
d663445c1533 Initialise the outgoing packet queue Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	109
886 cbc73a5aefb0 requirenext doesn't need two values Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	110 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	111 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	112 send the SSH_MSG_KEXINIT */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 ses.ignorenext = 0;
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	114 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	115 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	116 ses.reply_queue_tail = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 /* set all the algos to none */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 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	120 ses.newkeys = NULL;
534 0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	121 ses.keys->recv.algo_crypt = &dropbear_nocipher;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	122 ses.keys->trans.algo_crypt = &dropbear_nocipher;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	123 ses.keys->recv.crypt_mode = &dropbear_mode_none;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	124 ses.keys->trans.crypt_mode = &dropbear_mode_none;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125
534 0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	126 ses.keys->recv.algo_mac = &dropbear_nohash;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	127 ses.keys->trans.algo_mac = &dropbear_nohash;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	129 ses.keys->algo_kex = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 ses.keys->algo_hostkey = -1;
534 0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	131 ses.keys->recv.algo_comp = DROPBEAR_COMP_NONE;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	132 ses.keys->trans.algo_comp = DROPBEAR_COMP_NONE;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 #ifndef DISABLE_ZLIB
534 0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	135 ses.keys->recv.zstream = NULL;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 531 diff changeset	136 ses.keys->trans.zstream = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 #endif
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 /* key exchange buffers */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 ses.session_id = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 ses.kexhashbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 ses.transkexinit = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 ses.dh_K = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 ses.remoteident = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	146 ses.chantypes = NULL;
ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	147
21 d7cc5b484a2e - Port restriction code back in Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	148 ses.allowprivport = 0;
d7cc5b484a2e - Port restriction code back in Matt Johnston <matt@ucc.asn.au> parents: 6 diff changeset	149
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	150 TRACE(("leave session_init"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152
1531 fa733a314bee use a full prototype (#56) François Perrad <francois.perrad@gadz.org> parents: 1495 diff changeset	153 void session_loop(void(*loophandler)(void)) {
26 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 fd_set readfd, writefd;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	156 struct timeval timeout;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	157 int val;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	158
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	159 /* main loop, select()s for all sockets in use */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	160 for(;;) {
1074 10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	161 const int writequeue_has_space = (ses.writequeue_len <= 2*TRANS_MAX_PAYLOAD_LEN);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	162
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	163 timeout.tv_sec = select_timeout();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	164 timeout.tv_usec = 0;
1596 60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	165 DROPBEAR_FD_ZERO(&writefd);
60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	166 DROPBEAR_FD_ZERO(&readfd);
60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	167
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	168 dropbear_assert(ses.payload == NULL);
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	169
1151 a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	170 /* We get woken up when signal handlers write to this pipe.
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	171 SIGCHLD in svr-chansession is the only one currently. */
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1546 diff changeset	172 #if DROPBEAR_FUZZ
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	173 if (!fuzz.fuzzing)
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	174 #endif
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	175 {
1151 a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	176 FD_SET(ses.signal_pipe[0], &readfd);
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	177 }
1151 a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	178
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	179 /* set up for channels which can be read/written */
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	180 setchannelfds(&readfd, &writefd, writequeue_has_space);
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	181
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	182 /* Pending connections to test */
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	183 set_connect_fds(&writefd);
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	184
1060 4c733310c21d reword comment for clarity Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	185 /* We delay reading from the input socket during initial setup until
4c733310c21d reword comment for clarity Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	186 after we have written out our initial KEXINIT packet (empty writequeue).
4c733310c21d reword comment for clarity Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	187 This means our initial packet can be in-flight while we're doing a blocking
1074 10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	188 read for the remote ident.
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	189 We also avoid reading from the socket if the writequeue is full, that avoids
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	190 replies backing up */
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	191 if (ses.sock_in != -1
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	192 && (ses.remoteident \|\| isempty(&ses.writequeue))
10f198d4a308 Make main socket nonblocking. Limit writequeue size. Matt Johnston <matt@ucc.asn.au> parents: 1060 diff changeset	193 && writequeue_has_space) {
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	194 FD_SET(ses.sock_in, &readfd);
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	195 }
1151 a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	196
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	197 /* Ordering is important, this test must occur after any other function
a550e1e2e2a9 make sure that the test for queued packets to write occurs after Matt Johnston <matt@ucc.asn.au> parents: 1143 diff changeset	198 might have queued packets (such as connection handlers) */
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	199 if (ses.sock_out != -1 && !isempty(&ses.writequeue)) {
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	200 FD_SET(ses.sock_out, &writefd);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	201 }
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 1021 diff changeset	202
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	203 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	204
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	205 if (ses.exitflag) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	206 dropbear_exit("Terminated by signal");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	207 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	208
373 70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	209 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	210 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	211 }
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	212
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	213 if (val <= 0) {
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal Matt Johnston <matt@ucc.asn.au> parents: 344 diff changeset	214 /* 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	215 * 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	216 * 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	217 * We don't want to read/write FDs. */
1596 60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	218 DROPBEAR_FD_ZERO(&writefd);
60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	219 DROPBEAR_FD_ZERO(&readfd);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	220 }
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	221
a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	222 /* 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	223 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	224 wake up the select() above. */
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	225 ses.channel_signal_pending = 0;
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	226 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	227 char x;
1191 b370b4b172d0 Fix ses.channel_signal_pending race Matt Johnston <matt@ucc.asn.au> parents: 1151 diff changeset	228 TRACE(("signal pipe set"))
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	229 while (read(ses.signal_pipe[0], &x, 1) > 0) {}
1191 b370b4b172d0 Fix ses.channel_signal_pending race Matt Johnston <matt@ucc.asn.au> parents: 1151 diff changeset	230 ses.channel_signal_pending = 1;
416 a01c0c8e543a Improve behaviour when flushing out after a process has exited. Matt Johnston <matt@ucc.asn.au> parents: 373 diff changeset	231 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	232
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	233 /* check for auth timeout, rekeying required etc */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	234 checktimeouts();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	235
929 9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	236 /* process session socket's incoming data */
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	237 if (ses.sock_in != -1) {
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	238 if (FD_ISSET(ses.sock_in, &readfd)) {
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	239 if (!ses.remoteident) {
78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	240 /* blocking read of the version string */
78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	241 read_session_identification();
78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	242 } else {
78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	243 read_packet();
78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	244 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	245 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	246
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	247 /* Process the decrypted packet. After this, the read buffer
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	248 * will be ready for a new packet */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	249 if (ses.payload != NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	250 process_packet();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	251 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	252 }
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 1021 diff changeset	253
452 4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue Matt Johnston <matt@ucc.asn.au> parents: 448 diff changeset	254 /* 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	255 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	256 maybe_flush_reply_queue();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	257
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 1021 diff changeset	258 handle_connect_fds(&writefd);
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 1021 diff changeset	259
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	260 /* loop handler prior to channelio, in case the server loophandler closes
0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	261 channels on process exit */
0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	262 loophandler();
0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	263
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	264 /* process pipes etc for the channels, ses.dataallowed == 0
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	265 * during rekeying ) */
896 a1a97e98b0c1 Read (and enqueue) packets from interactive input even when Matt Johnston <matt@ucc.asn.au> parents: 891 diff changeset	266 channelio(&readfd, &writefd);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	267
929 9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	268 /* process session socket's outgoing data */
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	269 if (ses.sock_out != -1) {
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	270 if (!isempty(&ses.writequeue)) {
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	271 write_packet();
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	272 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	273 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	274
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	275 } /* for(;;) */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	276
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	277 /* Not reached */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	278 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	279
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	280 static void cleanup_buf(buffer **buf) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	281 if (!*buf) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	282 return;
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	283 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	284 buf_burn(*buf);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	285 buf_free(*buf);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	286 *buf = NULL;
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	287 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	288
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 /* clean up a session on exit */
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	290 void session_cleanup() {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291
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	292 TRACE(("enter session_cleanup"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 /* we can't cleanup if we don't know the session state */
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	295 if (!ses.init_done) {
0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1316 diff changeset	296 TRACE(("leave session_cleanup: !ses.init_done"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 return;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 }
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	299
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	300 /* BEWARE of changing order of functions here. */
1041 3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	301
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	302 /* Must be before extra_session_cleanup() */
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	303 chancleanup();
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	304
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	305 if (ses.extra_session_cleanup) {
70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	306 ses.extra_session_cleanup();
70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	307 }
891 e78f5ce6e7bb cleanup before clearing keys Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	308
1079 acf444bcb115 Fix no-writev fallback Matt Johnston <matt@ucc.asn.au> parents: 1074 diff changeset	309 /* After these are freed most functions will fail */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1292 diff changeset	310 #if DROPBEAR_CLEANUP
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	311 /* listeners call cleanup functions, this should occur before
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	312 other session state is freed. */
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	313 remove_all_listeners();
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	314
1050 c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	315 remove_connect_pending();
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	316
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	317 while (!isempty(&ses.writequeue)) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	318 buf_free(dequeue(&ses.writequeue));
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	319 }
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	320
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	321 m_free(ses.newkeys);
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	322 #ifndef DISABLE_ZLIB
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	323 if (ses.keys->recv.zstream != NULL) {
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	324 if (inflateEnd(ses.keys->recv.zstream) == Z_STREAM_ERROR) {
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	325 dropbear_exit("Crypto error");
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	326 }
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	327 m_free(ses.keys->recv.zstream);
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	328 }
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	329 #endif
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	330
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	331 m_free(ses.remoteident);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	332 m_free(ses.authstate.pw_dir);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	333 m_free(ses.authstate.pw_name);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	334 m_free(ses.authstate.pw_shell);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	335 m_free(ses.authstate.pw_passwd);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	336 m_free(ses.authstate.username);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	337 #endif
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	338
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	339 cleanup_buf(&ses.session_id);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	340 cleanup_buf(&ses.hash);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	341 cleanup_buf(&ses.payload);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	342 cleanup_buf(&ses.readbuf);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	343 cleanup_buf(&ses.writepayload);
1041 3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	344 cleanup_buf(&ses.kexhashbuf);
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	345 cleanup_buf(&ses.transkexinit);
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	346 if (ses.dh_K) {
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	347 mp_clear(ses.dh_K);
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	348 }
3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	349 m_free(ses.dh_K);
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 1038 diff changeset	350
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	351 m_burn(ses.keys, sizeof(struct key_context));
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352 m_free(ses.keys);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353
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	354 TRACE(("leave session_cleanup"))
4 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
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	357 void send_session_identification() {
751 685d05f1cc5c Just put the version string on the queue, don't use atomicio Matt Johnston <matt@ucc.asn.au> parents: 733 diff changeset	358 buffer *writebuf = buf_new(strlen(LOCAL_IDENT "\r\n") + 1);
1094 c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign] Gaël PORTAY <gael.portay@gmail.com> parents: 1079 diff changeset	359 buf_putbytes(writebuf, (const unsigned char *) LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n"));
1577 399d8eb961b5 get rid of unused packet_type in encrypted write queue Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	360 writebuf_enqueue(writebuf);
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	361 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	362
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 705 diff changeset	363 static void read_session_identification() {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	364 /* max length of 255 chars */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365 char linebuf[256];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	366 int len = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	367 char done = 0;
103 8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	368 int i;
513 a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	369 /* If they send more than 50 lines, something is wrong */
275 7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	370 for (i = 0; i < 50; i++) {
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	371 len = ident_readln(ses.sock_in, linebuf, sizeof(linebuf));
103 8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	372
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	373 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	374 /* It failed */
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	375 break;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	376 }
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	377
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	378 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	379 /* start of line matches */
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	380 done = 1;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	381 break;
8aeac62a968f Allow leading lines before the ident banner when connecting Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	382 }
4 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
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 if (!done) {
1302 6a14b1f6dc04 better TRACE of failed remote ident Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	386 TRACE(("error reading remote ident: %s\n", strerror(errno)))
344 bf29e6659fb9 Just use the normal "remote closed" handler when reading ident stings Matt Johnston <matt@ucc.asn.au> parents: 275 diff changeset	387 ses.remoteclosed();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388 } else {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389 /* linebuf is already null terminated */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 ses.remoteident = m_malloc(len);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	391 memcpy(ses.remoteident, linebuf, len);
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
513 a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	394 /* Shall assume that 2.x will be backwards compatible. */
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	395 if (strncmp(ses.remoteident, "SSH-2.", 6) != 0
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	396 && strncmp(ses.remoteident, "SSH-1.99-", 9) != 0) {
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	397 dropbear_exit("Incompatible remote version '%s'", ses.remoteident);
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	398 }
275 7f9adaf85fca Exit with a message if the ssh protocol version is incompatible Matt Johnston <matt@ucc.asn.au> parents: 242 diff changeset	399
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	400 TRACE(("remoteident: %s", ses.remoteident))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	401
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	404 /* 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	405 * or -1 on failure */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406 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	407
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408 char in;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409 int pos = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 int num = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 fd_set fds;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	412 struct timeval timeout;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413
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	414 TRACE(("enter ident_readln"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 if (count < 1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419
1596 60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1577 diff changeset	420 DROPBEAR_FD_ZERO(&fds);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	422 /* select since it's a non-blocking fd */
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 /* leave space to null-terminate */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425 while (pos < count-1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 FD_SET(fd, &fds);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	428
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429 timeout.tv_sec = 1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	430 timeout.tv_usec = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 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	432 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433 continue;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 }
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	435 TRACE(("leave ident_readln: select error"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	436 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	439 checktimeouts();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 /* 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	442 * 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	443 * packet reader */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	444 if (FD_ISSET(fd, &fds)) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445 num = read(fd, &in, 1);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 /* 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	447 * 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	448 if (num < 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 /* error */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 continue; /* not a real error */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	452 }
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	453 TRACE(("leave ident_readln: read error"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	454 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	455 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	456 if (num == 0) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	457 /* 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	458 TRACE(("leave ident_readln: EOF"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	459 return -1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	461 if (in == '\n') {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	462 /* end of ident string */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 break;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	464 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	465 /* we don't want to include '\r's */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	466 if (in != '\r') {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 buf[pos] = in;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468 pos++;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	472
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	473 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	474 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	475 return pos+1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	476 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	477
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	478 void ignore_recv_response() {
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 1021 diff changeset	479 /* Do nothing */
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	480 TRACE(("Ignored msg_request_response"))
968 f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses Matt Johnston <matt@ucc.asn.au> parents: 941 diff changeset	481 }
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses Matt Johnston <matt@ucc.asn.au> parents: 941 diff changeset	482
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	483 static void send_msg_keepalive() {
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 1021 diff changeset	484 time_t old_time_idle = ses.last_packet_time_idle;
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 1021 diff changeset	485 struct Channel *chan = get_any_ready_channel();
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 1021 diff changeset	486
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	487 CHECKCLEARTOWRITE();
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	488
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	489 if (chan) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	490 /* Channel requests are preferable, more implementations
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	491 handle them than SSH_MSG_GLOBAL_REQUEST */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	492 TRACE(("keepalive channel request %d", chan->index))
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	493 start_send_channel_request(chan, DROPBEAR_KEEPALIVE_STRING);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	494 } else {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	495 TRACE(("keepalive global request"))
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	496 /* Some peers will reply with SSH_MSG_REQUEST_FAILURE,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	497 some will reply with SSH_MSG_UNIMPLEMENTED, some will exit. */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	498 buf_putbyte(ses.writepayload, SSH_MSG_GLOBAL_REQUEST);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	499 buf_putstring(ses.writepayload, DROPBEAR_KEEPALIVE_STRING,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	500 strlen(DROPBEAR_KEEPALIVE_STRING));
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	501 }
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	502 buf_putbyte(ses.writepayload, 1); /* want_reply */
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	503 encrypt_packet();
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	504
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	505 ses.last_packet_time_keepalive_sent = monotonic_now();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	506
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	507 /* keepalives shouldn't update idle timeout, reset it back */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	508 ses.last_packet_time_idle = old_time_idle;
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	509 }
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	510
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	511 /* 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	512 * user authentication, and the automatic rekeying. */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	513 static void checktimeouts() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	514
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	515 time_t now;
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 927 diff changeset	516 now = monotonic_now();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	517
1139 43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	518 if (IS_DROPBEAR_SERVER && ses.connect_time != 0
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	519 && now - ses.connect_time >= AUTH_TIMEOUT) {
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	520 dropbear_close("Timeout before auth");
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	521 }
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident Matt Johnston <matt@ucc.asn.au> parents: 1124 diff changeset	522
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	523 /* 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	524 if (ses.remoteident == NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	525 return;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	526 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	527
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	528 if (!ses.kexstate.sentkexinit
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	529 && (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	530 \|\| 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	531 TRACE(("rekeying after timeout or max data reached"))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	532 send_msg_kexinit();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	533 }
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	534
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	535 if (opts.keepalive_secs > 0 && ses.authstate.authdone) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	536 /* Avoid sending keepalives prior to auth - those are
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	537 not valid pre-auth packet types */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	538
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	539 /* Send keepalives if we've been idle */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	540 if (now - ses.last_packet_time_any_sent >= opts.keepalive_secs) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	541 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	542 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	543
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	544 /* Also send an explicit keepalive message to trigger a response
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	545 if the remote end hasn't sent us anything */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	546 if (now - ses.last_packet_time_keepalive_recv >= opts.keepalive_secs
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	547 && now - ses.last_packet_time_keepalive_sent >= opts.keepalive_secs) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	548 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	549 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	550
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	551 if (now - ses.last_packet_time_keepalive_recv
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	552 >= opts.keepalive_secs * DEFAULT_KEEPALIVE_LIMIT) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	553 dropbear_exit("Keepalive timeout");
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	554 }
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	555 }
513 a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	556
939 a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	557 if (opts.idle_timeout_secs > 0
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval Matt Johnston <matt@ucc.asn.au> parents: 929 diff changeset	558 && now - ses.last_packet_time_idle >= opts.idle_timeout_secs) {
513 a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	559 dropbear_close("Idle timeout");
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	560 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	561 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	562
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	563 static void update_timeout(long limit, long now, long last_event, long * timeout) {
1143 924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	564 TRACE2(("update_timeout limit %ld, now %ld, last %ld, timeout %ld",
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	565 limit, now, last_event, *timeout))
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	566 if (last_event > 0 && limit > 0) {
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	567 timeout = MIN(timeout, last_event+limit-now);
1143 924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	568 TRACE2(("new timeout %ld", *timeout))
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	569 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	570 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	571
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	572 static long select_timeout() {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	573 /* 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	574 as to avoid waking when unneccessary */
1310 090033317ca1 Avoid busy loop while waiting for rekey response Matt Johnston <matt@ucc.asn.au> parents: 1302 diff changeset	575 long timeout = KEX_REKEY_TIMEOUT;
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	576 long now = monotonic_now();
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	577
1310 090033317ca1 Avoid busy loop while waiting for rekey response Matt Johnston <matt@ucc.asn.au> parents: 1302 diff changeset	578 if (!ses.kexstate.sentkexinit) {
090033317ca1 Avoid busy loop while waiting for rekey response Matt Johnston <matt@ucc.asn.au> parents: 1302 diff changeset	579 update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout);
090033317ca1 Avoid busy loop while waiting for rekey response Matt Johnston <matt@ucc.asn.au> parents: 1302 diff changeset	580 }
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	581
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	582 if (ses.authstate.authdone != 1 && IS_DROPBEAR_SERVER) {
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	583 /* AUTH_TIMEOUT is only relevant before authdone */
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	584 update_timeout(AUTH_TIMEOUT, now, ses.connect_time, &timeout);
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	585 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	586
1143 924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	587 if (ses.authstate.authdone) {
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	588 update_timeout(opts.keepalive_secs, now,
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	589 MAX(ses.last_packet_time_keepalive_recv, ses.last_packet_time_keepalive_sent),
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	590 &timeout);
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent) Matt Johnston <matt@ucc.asn.au> parents: 1140 diff changeset	591 }
1140 f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	592
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	593 update_timeout(opts.idle_timeout_secs, now, ses.last_packet_time_idle,
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	594 &timeout);
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	595
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	596 /* clamp negative timeouts to zero - event has already triggered */
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration Matt Johnston <matt@ucc.asn.au> parents: 1139 diff changeset	597 return MAX(timeout, 0);
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 452 diff changeset	598 }
482 7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	599
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	600 const char* get_user_shell() {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	601 /* an empty shell should be interpreted as "/bin/sh" */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	602 if (ses.authstate.pw_shell[0] == '\0') {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	603 return "/bin/sh";
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	604 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	605 return ses.authstate.pw_shell;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	606 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 479 diff changeset	607 }
483 738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	608 void fill_passwd(const char* username) {
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	609 struct passwd *pw = NULL;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	610 if (ses.authstate.pw_name)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	611 m_free(ses.authstate.pw_name);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	612 if (ses.authstate.pw_dir)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	613 m_free(ses.authstate.pw_dir);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	614 if (ses.authstate.pw_shell)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	615 m_free(ses.authstate.pw_shell);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	616 if (ses.authstate.pw_passwd)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	617 m_free(ses.authstate.pw_passwd);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	618
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	619 pw = getpwnam(username);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	620 if (!pw) {
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	621 return;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	622 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	623 ses.authstate.pw_uid = pw->pw_uid;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	624 ses.authstate.pw_gid = pw->pw_gid;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	625 ses.authstate.pw_name = m_strdup(pw->pw_name);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	626 ses.authstate.pw_dir = m_strdup(pw->pw_dir);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	627 ses.authstate.pw_shell = m_strdup(pw->pw_shell);
676 0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	628 {
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	629 char *passwd_crypt = pw->pw_passwd;
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	630 #ifdef HAVE_SHADOW_H
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	631 /* get the shadow password if possible */
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	632 struct spwd *spasswd = getspnam(ses.authstate.pw_name);
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	633 if (spasswd && spasswd->sp_pwdp) {
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	634 passwd_crypt = spasswd->sp_pwdp;
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	635 }
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	636 #endif
705 2e573f39b88e Android returns NULL for pw_crypt, set it to something else Matt Johnston <matt@ucc.asn.au> parents: 676 diff changeset	637 if (!passwd_crypt) {
2e573f39b88e Android returns NULL for pw_crypt, set it to something else Matt Johnston <matt@ucc.asn.au> parents: 676 diff changeset	638 /* android supposedly returns NULL */
2e573f39b88e Android returns NULL for pw_crypt, set it to something else Matt Johnston <matt@ucc.asn.au> parents: 676 diff changeset	639 passwd_crypt = "!!";
2e573f39b88e Android returns NULL for pw_crypt, set it to something else Matt Johnston <matt@ucc.asn.au> parents: 676 diff changeset	640 }
676 0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	641 ses.authstate.pw_passwd = m_strdup(passwd_crypt);
0edf08895a33 Return immediate success for blank passwords if allowed Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	642 }
483 738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	643 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc. Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	644
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	645 /* Called when channels are modified */
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	646 void update_channel_prio() {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	647 enum dropbear_prio new_prio;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	648 int any = 0;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	649 unsigned int i;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	650
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	651 TRACE(("update_channel_prio"))
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	652
1031 64c0aa01e2b6 Update priority once the socket is open Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	653 if (ses.sock_out < 0) {
64c0aa01e2b6 Update priority once the socket is open Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	654 TRACE(("leave update_channel_prio: no socket"))
64c0aa01e2b6 Update priority once the socket is open Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	655 return;
64c0aa01e2b6 Update priority once the socket is open Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	656 }
64c0aa01e2b6 Update priority once the socket is open Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	657
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	658 new_prio = DROPBEAR_PRIO_BULK;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	659 for (i = 0; i < ses.chansize; i++) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	660 struct Channel *channel = ses.channels[i];
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	661 if (!channel \|\| channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	662 if (channel && channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	663 TRACE(("update_channel_prio: early %d", channel->index))
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	664 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	665 continue;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	666 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	667 any = 1;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	668 if (channel->prio == DROPBEAR_CHANNEL_PRIO_INTERACTIVE)
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	669 {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	670 TRACE(("update_channel_prio: lowdelay %d", channel->index))
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	671 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	672 break;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	673 } else if (channel->prio == DROPBEAR_CHANNEL_PRIO_UNKNOWABLE
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	674 && new_prio == DROPBEAR_PRIO_BULK)
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	675 {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	676 TRACE(("update_channel_prio: unknowable %d", channel->index))
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	677 new_prio = DROPBEAR_PRIO_DEFAULT;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	678 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	679 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	680
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	681 if (any == 0) {
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	682 /* lowdelay during setup */
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	683 TRACE(("update_channel_prio: not any"))
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	684 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	685 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	686
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	687 if (new_prio != ses.socket_prio) {
1020 363c0feca5d4 Fix print that no longer works since we're not using fourCCs Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	688 TRACE(("Dropbear priority transitioning %d -> %d", ses.socket_prio, new_prio))
941 5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	689 set_sock_priority(ses.sock_out, new_prio);
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	690 ses.socket_prio = new_prio;
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	691 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	692 }
5daedffd0769 Set tcp priority as follows: Matt Johnston <matt@ucc.asn.au> parents: 940 diff changeset	693

Mercurial > dropbear

annotate common-session.c @ 1652:d2753238f35f