annotate common-session.c @ 1068:9a6395ddb1b6 pam

resolve merge properly
author Matt Johnston <matt@ucc.asn.au>
date Fri, 23 Jan 2015 22:32:49 +0800
parents 73ea0dce9a57
children 2fa71c3b2827
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /*
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 * Dropbear - a SSH2 server
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 * Copyright (c) 2002,2003 Matt Johnston
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 * of this software and associated documentation files (the "Software"), to deal
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * in the Software without restriction, including without limitation the rights
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 * copies of the Software, and to permit persons to whom the Software is
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 * furnished to do so, subject to the following conditions:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 * The above copyright notice and this permission notice shall be included in
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 * all copies or substantial portions of the Software.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 * SOFTWARE. */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 #include "packet.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 #include "algo.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 #include "buffer.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 #include "dss.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 #include "ssh.h"
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"
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
38 static void checktimeouts();
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
39 static long select_timeout();
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
40 static int ident_readln(int fd, char* buf, int count);
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
41 static void read_session_identification();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
42
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
43 struct sshsession ses; /* GLOBAL */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 /* need to know if the session struct has been initialised, this way isn't the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 * cleanest, but works OK */
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
47 int sessinitdone = 0; /* GLOBAL */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 /* this is set when we get SIGINT or SIGTERM, the handler is in main.c */
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
50 int exitflag = 0; /* GLOBAL */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 /* 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
53 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
54 time_t now;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55
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
56 TRACE(("enter session_init"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57
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
58 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
59 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
60 ses.maxfd = MAX(sock_in, sock_out);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
62 ses.socket_prio = DROPBEAR_PRIO_DEFAULT;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
63 /* Sets it to lowdelay */
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
64 update_channel_prio();
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
65
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
66 now = monotonic_now();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
67 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
68 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
69 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
70 ses.last_packet_time_keepalive_sent = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
72 if (pipe(ses.signal_pipe) < 0) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
73 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
74 }
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
75 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
76 setnonblocking(ses.signal_pipe[1]);
537
7de2f22ea759 - Add the signal pipe to maxfd
Matt Johnston <matt@ucc.asn.au>
parents: 534
diff changeset
77
7de2f22ea759 - Add the signal pipe to maxfd
Matt Johnston <matt@ucc.asn.au>
parents: 534
diff changeset
78 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
79 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
80
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
81 kexfirstinitialise(); /* initialise the kex state */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 416
diff changeset
83 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
84 ses.transseq = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 ses.readbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 ses.payload = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88 ses.recvseq = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89
135
d663445c1533 Initialise the outgoing packet queue
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
90 initqueue(&ses.writequeue);
d663445c1533 Initialise the outgoing packet queue
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
91
886
cbc73a5aefb0 requirenext doesn't need two values
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
92 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
93 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
94 send the SSH_MSG_KEXINIT */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 ses.ignorenext = 0;
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
96 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
97 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
98 ses.reply_queue_tail = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 /* set all the algos to none */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 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
102 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
103 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
104 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
105 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
106 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
107
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 531
diff changeset
108 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
109 ses.keys->trans.algo_mac = &dropbear_nohash;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
111 ses.keys->algo_kex = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 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
113 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
114 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
115
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 #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
117 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
118 ses.keys->trans.zstream = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121 /* key exchange buffers */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 ses.session_id = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123 ses.kexhashbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 ses.transkexinit = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 ses.dh_K = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126 ses.remoteident = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
128 ses.chantypes = NULL;
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
129
21
d7cc5b484a2e - Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
130 ses.allowprivport = 0;
d7cc5b484a2e - Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
131
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
132 TRACE(("leave session_init"))
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
925
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
135 void session_loop() {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
136
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
137 fd_set readfd, writefd;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
138 struct timeval timeout;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
139 int val;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
140
925
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
141 assert(ses.recursion_count <= 1);
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
142 ses.recursion_count++;
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
143
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
144 /* main loop, select()s for all sockets in use */
925
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
145 while (!ses.exit_recursion) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
146
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
147 timeout.tv_sec = select_timeout();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
148 timeout.tv_usec = 0;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
149 FD_ZERO(&writefd);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
150 FD_ZERO(&readfd);
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
151 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
152
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
153 /* during initial setup we flush out the KEXINIT packet before
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
154 * attempting to read the remote version string, which might block */
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
155 if (ses.sock_in != -1 && (ses.remoteident || isempty(&ses.writequeue))) {
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
156 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
157 }
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
158 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
159 FD_SET(ses.sock_out, &writefd);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
160 }
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
161
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
162 /* We get woken up when signal handlers write to this pipe.
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
163 SIGCHLD in svr-chansession is the only one currently. */
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
164 FD_SET(ses.signal_pipe[0], &readfd);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
165
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 891
diff changeset
166 /* set up for channels which can be read/written */
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 891
diff changeset
167 setchannelfds(&readfd, &writefd);
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 891
diff changeset
168
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
169 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
170
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
171 if (exitflag) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
172 dropbear_exit("Terminated by signal");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
173 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
174
373
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
175 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
176 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
177 }
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
178
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
179 if (val <= 0) {
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
180 /* 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
181 * 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
182 * 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
183 * We don't want to read/write FDs. */
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
184 FD_ZERO(&writefd);
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents: 344
diff changeset
185 FD_ZERO(&readfd);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
186 }
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
187
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
188 /* 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
189 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
190 wake up the select() above. */
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
191 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
192 char x;
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
193 while (read(ses.signal_pipe[0], &x, 1) > 0) {}
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 373
diff changeset
194 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
195
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
196 /* check for auth timeout, rekeying required etc */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
197 checktimeouts();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
198
929
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
199 /* 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
200 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
201 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
202 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
203 /* 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
204 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
205 } 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
206 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
207 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
208 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
209
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
210 /* Process the decrypted packet. After this, the read buffer
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
211 * will be ready for a new packet */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
212 if (ses.payload != NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
213 process_packet();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
214 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
215 }
452
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
216
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
217 /* 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
218 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
219 maybe_flush_reply_queue();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
220
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
221 /* process pipes etc for the channels, ses.dataallowed == 0
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
222 * during rekeying ) */
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 891
diff changeset
223 channelio(&readfd, &writefd);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
224
929
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
225 /* 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
226 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
227 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
228 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
229 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
230 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
231
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
232
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
233 if (loophandler) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
234 loophandler();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
235 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
236
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
237 } /* for(;;) */
925
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
238 ses.recursion_count--;
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
239 ses.exit_recursion = 0;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
240 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
241
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 /* 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
243 void session_cleanup() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244
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
245 TRACE(("enter session_cleanup"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 /* we can't cleanup if we don't know the session state */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248 if (!sessinitdone) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
249 TRACE(("leave session_cleanup: !sessinitdone"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
250 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
251 }
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
252
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
253 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
254 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
255 }
891
e78f5ce6e7bb cleanup before clearing keys
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
256
e78f5ce6e7bb cleanup before clearing keys
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
257 chancleanup();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
258
891
e78f5ce6e7bb cleanup before clearing keys
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
259 /* Cleaning up keys must happen after other cleanup
e78f5ce6e7bb cleanup before clearing keys
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
260 functions which might queue packets */
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
261 if (ses.session_id) {
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
262 buf_burn(ses.session_id);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
263 buf_free(ses.session_id);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
264 ses.session_id = NULL;
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
265 }
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
266 if (ses.hash) {
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
267 buf_burn(ses.hash);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
268 buf_free(ses.hash);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
269 ses.hash = NULL;
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
270 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 m_burn(ses.keys, sizeof(struct key_context));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 m_free(ses.keys);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273
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
274 TRACE(("leave session_cleanup"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276
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
277 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
278 buffer *writebuf = buf_new(strlen(LOCAL_IDENT "\r\n") + 1);
685d05f1cc5c Just put the version string on the queue, don't use atomicio
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
279 buf_putbytes(writebuf, LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n"));
857
c19acba28590 use oldstyle comments
Matt Johnston <matt@ucc.asn.au>
parents: 801
diff changeset
280 buf_putbyte(writebuf, 0x0); /* packet type */
751
685d05f1cc5c Just put the version string on the queue, don't use atomicio
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
281 buf_setpos(writebuf, 0);
685d05f1cc5c Just put the version string on the queue, don't use atomicio
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
282 enqueue(&ses.writequeue, 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
283 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284
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
285 static void read_session_identification() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
286 /* max length of 255 chars */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
287 char linebuf[256];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288 int len = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
289 char done = 0;
103
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
290 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
291 /* 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
292 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
293 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
294
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
295 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
296 /* It failed */
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
297 break;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
298 }
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
299
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
300 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
301 /* start of line matches */
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
302 done = 1;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
303 break;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
304 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
305 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
306
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307 if (!done) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
308 TRACE(("err: %s for '%s'\n", strerror(errno), linebuf))
344
bf29e6659fb9 Just use the normal "remote closed" handler when reading ident stings
Matt Johnston <matt@ucc.asn.au>
parents: 275
diff changeset
309 ses.remoteclosed();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
310 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311 /* linebuf is already null terminated */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312 ses.remoteident = m_malloc(len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
313 memcpy(ses.remoteident, linebuf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
314 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
316 /* 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
317 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
318 && 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
319 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
320 }
275
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
321
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
322 TRACE(("remoteident: %s", ses.remoteident))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
325
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326 /* 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
327 * or -1 on failure */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
328 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
329
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 char in;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 int pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 int num = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 fd_set fds;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 struct timeval timeout;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335
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
336 TRACE(("enter ident_readln"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 if (count < 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342 FD_ZERO(&fds);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344 /* select since it's a non-blocking fd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346 /* leave space to null-terminate */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347 while (pos < count-1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
349 FD_SET(fd, &fds);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351 timeout.tv_sec = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352 timeout.tv_usec = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353 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
354 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
356 }
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
357 TRACE(("leave ident_readln: select error"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
358 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
360
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 checktimeouts();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 /* 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
364 * 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
365 * packet reader */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 if (FD_ISSET(fd, &fds)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 num = read(fd, &in, 1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368 /* 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
369 * 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
370 if (num < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 /* error */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
373 continue; /* not a real error */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 }
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
375 TRACE(("leave ident_readln: read error"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 if (num == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379 /* 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
380 TRACE(("leave ident_readln: EOF"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 if (in == '\n') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 /* end of ident string */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 /* we don't want to include '\r's */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 if (in != '\r') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 buf[pos] = in;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 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
396 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
397 return pos+1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
400 void ignore_recv_response() {
968
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents: 941
diff changeset
401 // 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
402 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
403 }
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents: 941
diff changeset
404
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
405 static void send_msg_keepalive() {
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
406 CHECKCLEARTOWRITE();
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
407 time_t old_time_idle = ses.last_packet_time_idle;
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
408
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
409 struct Channel *chan = get_any_ready_channel();
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
410
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
411 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
412 /* 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
413 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
414 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
415 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
416 } else {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
417 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
418 /* 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
419 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
420 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
421 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
422 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
423 }
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
424 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
425 encrypt_packet();
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
426
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
427 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
428
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
429 /* 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
430 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
431 }
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
432
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
433 /* 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
434 * user authentication, and the automatic rekeying. */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
435 static void checktimeouts() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
436
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
437 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
438 now = monotonic_now();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
439
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
440 /* 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
441 if (ses.remoteident == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
442 return;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
443 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
444
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
445 if (!ses.kexstate.sentkexinit
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
446 && (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
447 || 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
448 TRACE(("rekeying after timeout or max data reached"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
449 send_msg_kexinit();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
450 }
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
451
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
452 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
453 /* 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
454 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
455
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
456 /* 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
457 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
458 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
459 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
460
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
461 /* 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
462 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
463 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
464 && 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
465 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
466 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
467
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
468 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
469 >= 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
470 dropbear_exit("Keepalive timeout");
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
471 }
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
472 }
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
473
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
474 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
475 && 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
476 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
477 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
478 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
479
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
480 static long select_timeout() {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
481 /* 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
482 as to avoid waking when unneccessary */
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
483 long ret = LONG_MAX;
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
484 if (KEX_REKEY_TIMEOUT > 0)
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
485 ret = MIN(KEX_REKEY_TIMEOUT, ret);
926
b8208506322e Use AUTH_TIMEOUT only before authdone != 1.
Yousong Zhou <yszhou4tech@gmail.com>
parents: 896
diff changeset
486 /* AUTH_TIMEOUT is only relevant before authdone */
927
122fb3532038 Fix typo
Matt Johnston <matt@ucc.asn.au>
parents: 926
diff changeset
487 if (ses.authstate.authdone != 1 && AUTH_TIMEOUT > 0)
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
488 ret = MIN(AUTH_TIMEOUT, ret);
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
489 if (opts.keepalive_secs > 0)
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
490 ret = MIN(opts.keepalive_secs, ret);
926
b8208506322e Use AUTH_TIMEOUT only before authdone != 1.
Yousong Zhou <yszhou4tech@gmail.com>
parents: 896
diff changeset
491 if (opts.idle_timeout_secs > 0)
b8208506322e Use AUTH_TIMEOUT only before authdone != 1.
Yousong Zhou <yszhou4tech@gmail.com>
parents: 896
diff changeset
492 ret = MIN(opts.idle_timeout_secs, ret);
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
493 return ret;
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
494 }
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
495
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
496 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
497 /* 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
498 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
499 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
500 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
501 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
502 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
503 }
483
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
504 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
505 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
506 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
507 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
508 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
509 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
510 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
511 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
512 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
513 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
514
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
515 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
516 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
517 return;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
518 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
519 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
520 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
521 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
522 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
523 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
524 {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
525 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
526 #ifdef HAVE_SHADOW_H
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
527 /* 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
528 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
529 if (spasswd && spasswd->sp_pwdp) {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
530 passwd_crypt = spasswd->sp_pwdp;
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
531 }
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
532 #endif
705
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
533 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
534 /* 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
535 passwd_crypt = "!!";
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
536 }
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
537 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
538 }
483
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
539 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
540
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
541 /* Called when channels are modified */
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
542 void update_channel_prio() {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
543 enum dropbear_prio new_prio;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
544 int any = 0;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
545 unsigned int i;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
546
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
547 TRACE(("update_channel_prio"))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
548
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
549 new_prio = DROPBEAR_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
550 for (i = 0; i < ses.chansize; i++) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
551 struct Channel *channel = ses.channels[i];
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
552 if (!channel || channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
553 if (channel && channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
554 TRACE(("update_channel_prio: early %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
555 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
556 continue;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
557 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
558 any = 1;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
559 if (channel->prio == DROPBEAR_CHANNEL_PRIO_INTERACTIVE)
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
560 {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
561 TRACE(("update_channel_prio: lowdelay %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
562 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
563 break;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
564 } else if (channel->prio == DROPBEAR_CHANNEL_PRIO_UNKNOWABLE
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
565 && new_prio == DROPBEAR_PRIO_BULK)
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
566 {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
567 TRACE(("update_channel_prio: unknowable %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
568 new_prio = DROPBEAR_PRIO_DEFAULT;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
569 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
570 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
571
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
572 if (any == 0) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
573 /* lowdelay during setup */
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
574 TRACE(("update_channel_prio: not any"))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
575 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
576 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
577
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
578 if (new_prio != ses.socket_prio) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
579 TRACE(("Dropbear priority transitioning %4.4s -> %4.4s", (char*)&ses.socket_prio, (char*)&new_prio))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
580 set_sock_priority(ses.sock_out, new_prio);
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
581 ses.socket_prio = new_prio;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
582 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
583 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
584