Mercurial > dropbear
annotate common-session.c @ 481:357a2e2e9bcc
- Generalise spawn_command function
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 15 Sep 2008 13:41:18 +0000 |
parents | e3db1f7a2e43 |
children | 7ad49f34a122 |
rev | line source |
---|---|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1 /* |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
2 * Dropbear - a SSH2 server |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
3 * |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
4 * Copyright (c) 2002,2003 Matt Johnston |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
5 * All rights reserved. |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
6 * |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
8 * of this software and associated documentation files (the "Software"), to deal |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
9 * in the Software without restriction, including without limitation the rights |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
11 * copies of the Software, and to permit persons to whom the Software is |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
12 * furnished to do so, subject to the following conditions: |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
13 * |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
14 * The above copyright notice and this permission notice shall be included in |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
15 * all copies or substantial portions of the Software. |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
16 * |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
23 * SOFTWARE. */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
24 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
25 #include "includes.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
26 #include "session.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
27 #include "dbutil.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
28 #include "packet.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
29 #include "algo.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
30 #include "buffer.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
31 #include "dss.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
32 #include "ssh.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
33 #include "random.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
34 #include "kex.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
35 #include "channel.h" |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
36 #include "atomicio.h" |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
37 #include "runopts.h" |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
38 |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
39 static void checktimeouts(); |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
40 static long select_timeout(); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
41 static int ident_readln(int fd, char* buf, int count); |
26 | 42 |
24 | 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 | 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 | 50 int exitflag = 0; /* GLOBAL */ |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
51 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
52 |
26 | 53 |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
54 /* called only at the start of a session, set up initial state */ |
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
|
55 void common_session_init(int sock_in, int sock_out, char* remotehost) { |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
56 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
135
diff
changeset
|
57 TRACE(("enter session_init")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
58 |
26 | 59 ses.remotehost = remotehost; |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
60 |
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
|
61 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
|
62 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
|
63 ses.maxfd = MAX(sock_in, sock_out); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
64 |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
65 ses.connect_time = 0; |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
66 ses.last_packet_time = 0; |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
67 |
416
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
68 if (pipe(ses.signal_pipe) < 0) { |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
69 dropbear_exit("signal pipe failed"); |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
70 } |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
71 setnonblocking(ses.signal_pipe[0]); |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
72 setnonblocking(ses.signal_pipe[1]); |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
73 |
33 | 74 kexfirstinitialise(); /* initialise the kex state */ |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
75 |
448
9c61e7af0156
Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents:
416
diff
changeset
|
76 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
|
77 ses.transseq = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
78 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
79 ses.readbuf = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
80 ses.decryptreadbuf = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
81 ses.payload = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
82 ses.recvseq = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
83 |
135
d663445c1533
Initialise the outgoing packet queue
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
|
84 initqueue(&ses.writequeue); |
d663445c1533
Initialise the outgoing packet queue
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
|
85 |
22
c1e5d9195402
merge of abac2150ee4f4031a98016241fbd136d24fed127
Matt Johnston <matt@ucc.asn.au>
parents:
21
diff
changeset
|
86 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
|
87 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
|
88 send the SSH_MSG_KEXINIT */ |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
89 ses.ignorenext = 0; |
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
90 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
|
91 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
|
92 ses.reply_queue_tail = NULL; |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
93 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
94 /* set all the algos to none */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
95 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
|
96 ses.newkeys = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
97 ses.keys->recv_algo_crypt = &dropbear_nocipher; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
98 ses.keys->trans_algo_crypt = &dropbear_nocipher; |
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 ses.keys->recv_algo_mac = &dropbear_nohash; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
101 ses.keys->trans_algo_mac = &dropbear_nohash; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
102 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
103 ses.keys->algo_kex = -1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
104 ses.keys->algo_hostkey = -1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
105 ses.keys->recv_algo_comp = DROPBEAR_COMP_NONE; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
106 ses.keys->trans_algo_comp = DROPBEAR_COMP_NONE; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
107 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
108 #ifndef DISABLE_ZLIB |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
109 ses.keys->recv_zstream = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
110 ses.keys->trans_zstream = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
111 #endif |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
112 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
113 /* key exchange buffers */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
114 ses.session_id = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
115 ses.kexhashbuf = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
116 ses.transkexinit = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
117 ses.dh_K = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
118 ses.remoteident = NULL; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
119 |
6
ab00ef513e97
Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
120 ses.chantypes = NULL; |
ab00ef513e97
Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
121 |
21
d7cc5b484a2e
- Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents:
6
diff
changeset
|
122 ses.allowprivport = 0; |
d7cc5b484a2e
- Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents:
6
diff
changeset
|
123 |
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
|
124 TRACE(("leave session_init")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
125 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
126 |
26 | 127 void session_loop(void(*loophandler)()) { |
128 | |
129 fd_set readfd, writefd; | |
130 struct timeval timeout; | |
131 int val; | |
132 | |
133 /* main loop, select()s for all sockets in use */ | |
134 for(;;) { | |
135 | |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
136 timeout.tv_sec = select_timeout(); |
26 | 137 timeout.tv_usec = 0; |
138 FD_ZERO(&writefd); | |
139 FD_ZERO(&readfd); | |
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
140 dropbear_assert(ses.payload == NULL); |
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
|
141 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
|
142 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
|
143 } |
e3db1f7a2e43
- Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents:
454
diff
changeset
|
144 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
|
145 FD_SET(ses.sock_out, &writefd); |
26 | 146 } |
416
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
147 |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
148 /* 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
|
149 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
|
150 FD_SET(ses.signal_pipe[0], &readfd); |
26 | 151 |
152 /* set up for channels which require reading/writing */ | |
153 if (ses.dataallowed) { | |
154 setchannelfds(&readfd, &writefd); | |
155 } | |
156 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout); | |
157 | |
158 if (exitflag) { | |
159 dropbear_exit("Terminated by signal"); | |
160 } | |
161 | |
373
70caa99bfe3a
Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents:
344
diff
changeset
|
162 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
|
163 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
|
164 } |
70caa99bfe3a
Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents:
344
diff
changeset
|
165 |
70caa99bfe3a
Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents:
344
diff
changeset
|
166 if (val <= 0) { |
70caa99bfe3a
Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents:
344
diff
changeset
|
167 /* 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
|
168 * 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
|
169 * 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
|
170 * 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
|
171 FD_ZERO(&writefd); |
70caa99bfe3a
Tidy up behaviour when select() is interrupted. We follow normal
Matt Johnston <matt@ucc.asn.au>
parents:
344
diff
changeset
|
172 FD_ZERO(&readfd); |
26 | 173 } |
416
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
174 |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
175 /* 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
|
176 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
|
177 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
|
178 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
|
179 char x; |
a01c0c8e543a
Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents:
373
diff
changeset
|
180 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
|
181 } |
26 | 182 |
183 /* check for auth timeout, rekeying required etc */ | |
184 checktimeouts(); | |
185 | |
186 /* process session socket's incoming/outgoing 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
|
187 if (ses.sock_out != -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
|
188 if (FD_ISSET(ses.sock_out, &writefd) && !isempty(&ses.writequeue)) { |
26 | 189 write_packet(); |
190 } | |
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
|
191 } |
26 | 192 |
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
|
193 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
|
194 if (FD_ISSET(ses.sock_in, &readfd)) { |
26 | 195 read_packet(); |
196 } | |
197 | |
198 /* Process the decrypted packet. After this, the read buffer | |
199 * will be ready for a new packet */ | |
200 if (ses.payload != NULL) { | |
201 process_packet(); | |
202 } | |
203 } | |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
204 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
205 /* 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
|
206 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
|
207 maybe_flush_reply_queue(); |
26 | 208 |
209 /* process pipes etc for the channels, ses.dataallowed == 0 | |
210 * during rekeying ) */ | |
211 if (ses.dataallowed) { | |
212 channelio(&readfd, &writefd); | |
213 } | |
214 | |
215 if (loophandler) { | |
216 loophandler(); | |
217 } | |
218 | |
219 } /* for(;;) */ | |
220 | |
221 /* Not reached */ | |
222 } | |
223 | |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
224 /* clean up a session on exit */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
225 void common_session_cleanup() { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
226 |
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
|
227 TRACE(("enter session_cleanup")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
228 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
229 /* 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
|
230 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
|
231 TRACE(("leave session_cleanup: !sessinitdone")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
232 return; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
233 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
234 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
235 m_free(ses.session_id); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
236 m_burn(ses.keys, sizeof(struct key_context)); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
237 m_free(ses.keys); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
238 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
239 chancleanup(); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
240 |
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
|
241 TRACE(("leave session_cleanup")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
242 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
243 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
244 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
245 void session_identification() { |
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 /* max length of 255 chars */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
248 char linebuf[256]; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
249 int len = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
250 char done = 0; |
103
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
251 int i; |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
252 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
253 /* write our version string, this blocks */ |
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
|
254 if (atomicio(write, ses.sock_out, LOCAL_IDENT "\r\n", |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
255 strlen(LOCAL_IDENT "\r\n")) == DROPBEAR_FAILURE) { |
344
bf29e6659fb9
Just use the normal "remote closed" handler when reading ident stings
Matt Johnston <matt@ucc.asn.au>
parents:
275
diff
changeset
|
256 ses.remoteclosed(); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
257 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
258 |
275
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
259 /* If they send more than 50 lines, something is wrong */ |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
260 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
|
261 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
|
262 |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
263 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
|
264 /* It failed */ |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
265 break; |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
266 } |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
267 |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
268 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
|
269 /* start of line matches */ |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
270 done = 1; |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
271 break; |
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
272 } |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
273 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
274 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
275 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
|
276 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
|
277 ses.remoteclosed(); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
278 } else { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
279 /* linebuf is already null terminated */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
280 ses.remoteident = m_malloc(len); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
281 memcpy(ses.remoteident, linebuf, len); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
282 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
283 |
275
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
284 /* Shall assume that 2.x will be backwards compatible. */ |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
285 if (strncmp(ses.remoteident, "SSH-2.", 6) != 0 |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
286 && strncmp(ses.remoteident, "SSH-1.99-", 9) != 0) { |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
287 dropbear_exit("Incompatible remote version '%s'", ses.remoteident); |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
288 } |
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
289 |
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
|
290 TRACE(("remoteident: %s", ses.remoteident)) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
291 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
292 } |
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 /* 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
|
295 * or -1 on failure */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
296 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
|
297 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
298 char in; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
299 int pos = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
300 int num = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
301 fd_set fds; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
302 struct timeval timeout; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
303 |
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
|
304 TRACE(("enter ident_readln")) |
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 if (count < 1) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
307 return -1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
308 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
309 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
310 FD_ZERO(&fds); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
311 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
312 /* select since it's a non-blocking fd */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
313 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
314 /* leave space to null-terminate */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
315 while (pos < count-1) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
316 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
317 FD_SET(fd, &fds); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
318 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
319 timeout.tv_sec = 1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
320 timeout.tv_usec = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
321 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
|
322 if (errno == EINTR) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
323 continue; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
324 } |
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
|
325 TRACE(("leave ident_readln: select error")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
326 return -1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
327 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
328 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
329 checktimeouts(); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
330 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
331 /* 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
|
332 * 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
|
333 * packet reader */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
334 if (FD_ISSET(fd, &fds)) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
335 num = read(fd, &in, 1); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
336 /* 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
|
337 * 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
|
338 if (num < 0) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
339 /* error */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
340 if (errno == EINTR) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
341 continue; /* not a real error */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
342 } |
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
|
343 TRACE(("leave ident_readln: read error")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
344 return -1; |
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 if (num == 0) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
347 /* 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
|
348 TRACE(("leave ident_readln: EOF")) |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
349 return -1; |
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 if (in == '\n') { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
352 /* end of ident string */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
353 break; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
354 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
355 /* we don't want to include '\r's */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
356 if (in != '\r') { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
357 buf[pos] = in; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
358 pos++; |
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 } |
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 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
|
364 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
|
365 return pos+1; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
366 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
367 |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
368 void send_msg_ignore() { |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
369 CHECKCLEARTOWRITE(); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
370 buf_putbyte(ses.writepayload, SSH_MSG_IGNORE); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
371 buf_putstring(ses.writepayload, "", 0); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
372 encrypt_packet(); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
373 } |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
374 |
26 | 375 /* Check all timeouts which are required. Currently these are the time for |
376 * user authentication, and the automatic rekeying. */ | |
377 static void checktimeouts() { | |
378 | |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
379 time_t now; |
26 | 380 |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
381 now = time(NULL); |
26 | 382 |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
383 if (ses.connect_time != 0 && now - ses.connect_time >= AUTH_TIMEOUT) { |
26 | 384 dropbear_close("Timeout before auth"); |
385 } | |
386 | |
387 /* we can't rekey if we haven't done remote ident exchange yet */ | |
388 if (ses.remoteident == NULL) { | |
389 return; | |
390 } | |
391 | |
392 if (!ses.kexstate.sentkexinit | |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
393 && (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
|
394 || 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
|
395 TRACE(("rekeying after timeout or max data reached")) |
26 | 396 send_msg_kexinit(); |
397 } | |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
398 |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
399 if (opts.keepalive_secs > 0 |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
400 && now - ses.last_packet_time >= opts.keepalive_secs) { |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
401 send_msg_ignore(); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
402 } |
26 | 403 } |
404 | |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
405 static long select_timeout() { |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
406 /* 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
|
407 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
|
408 long ret = LONG_MAX; |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
409 if (KEX_REKEY_TIMEOUT > 0) |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
410 ret = MIN(KEX_REKEY_TIMEOUT, ret); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
411 if (AUTH_TIMEOUT > 0) |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
412 ret = MIN(AUTH_TIMEOUT, ret); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
413 if (opts.keepalive_secs > 0) |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
414 ret = MIN(opts.keepalive_secs, ret); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
415 return ret; |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
416 } |