Mercurial > dropbear
annotate cli-session.c @ 447:278805938dcf
Patch from Nicolai Ehemann to try binding before going to the background,
so that if it exits early (because something's already listening etc)
then it will return an exitcode of 1.
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Thu, 19 Jul 2007 15:54:18 +0000 |
| parents | c216212001fc |
| children | c1e9c81d1d27 d4f32c3443ac e3db1f7a2e43 |
| rev | line source |
|---|---|
|
74
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
1 /* |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
2 * Dropbear SSH |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
3 * |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
4 * Copyright (c) 2002,2003 Matt Johnston |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
5 * Copyright (c) 2004 by Mihnea Stoenescu |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
6 * All rights reserved. |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
7 * |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
8 * Permission is hereby granted, free of charge, to any person obtaining a copy |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
9 * of this software and associated documentation files (the "Software"), to deal |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
10 * in the Software without restriction, including without limitation the rights |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
12 * copies of the Software, and to permit persons to whom the Software is |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
13 * furnished to do so, subject to the following conditions: |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
14 * |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
15 * The above copyright notice and this permission notice shall be included in |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
16 * all copies or substantial portions of the Software. |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
17 * |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
24 * SOFTWARE. */ |
|
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
25 |
| 26 | 26 #include "includes.h" |
| 27 #include "session.h" | |
| 28 #include "dbutil.h" | |
| 29 #include "kex.h" | |
| 30 #include "ssh.h" | |
| 31 #include "packet.h" | |
| 64 | 32 #include "tcpfwd.h" |
| 26 | 33 #include "channel.h" |
| 34 #include "random.h" | |
| 33 | 35 #include "service.h" |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
36 #include "runopts.h" |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
37 #include "chansession.h" |
| 26 | 38 |
| 39 static void cli_remoteclosed(); | |
| 40 static void cli_sessionloop(); | |
| 33 | 41 static void cli_session_init(); |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
42 static void cli_finished(); |
| 26 | 43 |
| 44 struct clientsession cli_ses; /* GLOBAL */ | |
| 45 | |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
46 /* Sorted in decreasing frequency will be more efficient - data and window |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
47 * should be first */ |
| 26 | 48 static const packettype cli_packettypes[] = { |
|
74
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
68
diff
changeset
|
49 /* TYPE, FUNCTION */ |
| 26 | 50 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data}, |
| 107 | 51 {SSH_MSG_CHANNEL_EXTENDED_DATA, recv_msg_channel_extended_data}, |
| 26 | 52 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust}, |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
53 {SSH_MSG_USERAUTH_FAILURE, recv_msg_userauth_failure}, /* client */ |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
54 {SSH_MSG_USERAUTH_SUCCESS, recv_msg_userauth_success}, /* client */ |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
55 {SSH_MSG_KEXINIT, recv_msg_kexinit}, |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
56 {SSH_MSG_KEXDH_REPLY, recv_msg_kexdh_reply}, /* client */ |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
57 {SSH_MSG_NEWKEYS, recv_msg_newkeys}, |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
58 {SSH_MSG_SERVICE_ACCEPT, recv_msg_service_accept}, /* client */ |
| 26 | 59 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request}, |
| 60 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open}, | |
| 61 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof}, | |
| 62 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close}, | |
| 63 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation}, | |
| 64 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure}, | |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
65 {SSH_MSG_USERAUTH_BANNER, recv_msg_userauth_banner}, /* client */ |
|
249
efbaf6b03837
added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents:
215
diff
changeset
|
66 {SSH_MSG_USERAUTH_SPECIFIC_60, recv_msg_userauth_specific_60}, /* client */ |
| 26 | 67 {0, 0} /* End */ |
| 68 }; | |
| 69 | |
| 70 static const struct ChanType *cli_chantypes[] = { | |
| 64 | 71 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 72 &cli_chan_tcpremote, | |
| 73 #endif | |
| 26 | 74 NULL /* Null termination */ |
| 75 }; | |
| 33 | 76 |
| 26 | 77 void cli_session(int sock, char* remotehost) { |
| 78 | |
|
272
3be7ae2e8dfa
Only read /dev/random once when the program starts
Matt Johnston <matt@ucc.asn.au>
parents:
249
diff
changeset
|
79 seedrandom(); |
|
3be7ae2e8dfa
Only read /dev/random once when the program starts
Matt Johnston <matt@ucc.asn.au>
parents:
249
diff
changeset
|
80 |
| 26 | 81 crypto_init(); |
|
272
3be7ae2e8dfa
Only read /dev/random once when the program starts
Matt Johnston <matt@ucc.asn.au>
parents:
249
diff
changeset
|
82 |
| 26 | 83 common_session_init(sock, remotehost); |
| 84 | |
| 85 chaninitialise(cli_chantypes); | |
| 86 | |
| 33 | 87 /* Set up cli_ses vars */ |
| 88 cli_session_init(); | |
| 26 | 89 |
| 90 /* Ready to go */ | |
| 91 sessinitdone = 1; | |
| 92 | |
| 93 /* Exchange identification */ | |
| 94 session_identification(); | |
| 95 | |
| 96 send_msg_kexinit(); | |
| 97 | |
| 98 session_loop(cli_sessionloop); | |
| 99 | |
| 100 /* Not reached */ | |
| 101 | |
| 33 | 102 } |
| 26 | 103 |
| 33 | 104 static void cli_session_init() { |
| 105 | |
| 106 cli_ses.state = STATE_NOTHING; | |
| 107 cli_ses.kex_state = KEX_NOTHING; | |
| 108 | |
|
39
0883c0906870
tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
37
diff
changeset
|
109 cli_ses.tty_raw_mode = 0; |
|
41
18eccbfb9641
added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents:
40
diff
changeset
|
110 cli_ses.winchange = 0; |
|
39
0883c0906870
tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
37
diff
changeset
|
111 |
|
175
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
112 /* We store std{in,out,err}'s flags, so we can set them back on exit |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
113 * (otherwise busybox's ash isn't happy */ |
|
99
0247fbd9379d
Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
114 cli_ses.stdincopy = dup(STDIN_FILENO); |
|
0247fbd9379d
Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
115 cli_ses.stdinflags = fcntl(STDIN_FILENO, F_GETFL, 0); |
|
175
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
116 cli_ses.stdoutcopy = dup(STDOUT_FILENO); |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
117 cli_ses.stdoutflags = fcntl(STDOUT_FILENO, F_GETFL, 0); |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
118 cli_ses.stderrcopy = dup(STDERR_FILENO); |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
119 cli_ses.stderrflags = fcntl(STDERR_FILENO, F_GETFL, 0); |
|
99
0247fbd9379d
Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
120 |
|
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
121 cli_ses.retval = EXIT_SUCCESS; /* Assume it's clean if we don't get a |
|
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
122 specific exit status */ |
|
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
123 |
| 47 | 124 /* Auth */ |
|
215
aad4b3f58556
rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
parents:
175
diff
changeset
|
125 cli_ses.lastprivkey = NULL; |
|
136
fb7147e2fb04
- Fixed a couple of compile warnings
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
|
126 cli_ses.lastauthtype = 0; |
| 47 | 127 |
| 33 | 128 /* For printing "remote host closed" for the user */ |
| 129 ses.remoteclosed = cli_remoteclosed; | |
| 130 ses.buf_match_algo = cli_buf_match_algo; | |
| 131 | |
| 132 /* packet handlers */ | |
| 133 ses.packettypes = cli_packettypes; | |
|
35
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
134 |
|
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
135 ses.isserver = 0; |
| 26 | 136 } |
| 137 | |
| 33 | 138 /* This function drives the progress of the session - it initiates KEX, |
| 139 * service, userauth and channel requests */ | |
| 26 | 140 static void cli_sessionloop() { |
| 141 | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
142 TRACE(("enter cli_sessionloop")) |
| 33 | 143 |
|
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
144 if (ses.lastpacket == SSH_MSG_KEXINIT && cli_ses.kex_state == KEX_NOTHING) { |
|
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
145 cli_ses.kex_state = KEXINIT_RCVD; |
| 33 | 146 } |
| 147 | |
|
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
148 if (cli_ses.kex_state == KEXINIT_RCVD) { |
| 33 | 149 |
| 150 /* We initiate the KEXDH. If DH wasn't the correct type, the KEXINIT | |
| 151 * negotiation would have failed. */ | |
| 152 send_msg_kexdh_init(); | |
| 153 cli_ses.kex_state = KEXDH_INIT_SENT; | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
154 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD")) |
| 33 | 155 return; |
| 156 } | |
| 157 | |
| 158 /* A KEX has finished, so we should go back to our KEX_NOTHING state */ | |
| 159 if (cli_ses.kex_state != KEX_NOTHING && ses.kexstate.recvkexinit == 0 | |
| 160 && ses.kexstate.sentkexinit == 0) { | |
| 161 cli_ses.kex_state = KEX_NOTHING; | |
| 162 } | |
| 163 | |
| 164 /* We shouldn't do anything else if a KEX is in progress */ | |
| 165 if (cli_ses.kex_state != KEX_NOTHING) { | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
166 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING")) |
| 33 | 167 return; |
| 168 } | |
| 169 | |
| 170 /* We should exit if we haven't donefirstkex: we shouldn't reach here | |
| 171 * in normal operation */ | |
| 172 if (ses.kexstate.donefirstkex == 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:
136
diff
changeset
|
173 TRACE(("XXX XXX might be bad! leave cli_sessionloop: haven't donefirstkex")) |
|
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
174 return; |
| 33 | 175 } |
| 176 | |
| 26 | 177 switch (cli_ses.state) { |
| 178 | |
| 33 | 179 case STATE_NOTHING: |
| 180 /* We've got the transport layer sorted, we now need to request | |
| 181 * userauth */ | |
| 182 send_msg_service_request(SSH_SERVICE_USERAUTH); | |
| 183 cli_ses.state = SERVICE_AUTH_REQ_SENT; | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
184 TRACE(("leave cli_sessionloop: sent userauth service req")) |
| 33 | 185 return; |
| 26 | 186 |
| 33 | 187 /* userauth code */ |
| 188 case SERVICE_AUTH_ACCEPT_RCVD: | |
| 189 cli_auth_getmethods(); | |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
190 cli_ses.state = USERAUTH_REQ_SENT; |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
191 TRACE(("leave cli_sessionloop: sent userauth methods req")) |
| 33 | 192 return; |
| 193 | |
| 194 case USERAUTH_FAIL_RCVD: | |
| 195 cli_auth_try(); | |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
196 cli_ses.state = USERAUTH_REQ_SENT; |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
197 TRACE(("leave cli_sessionloop: cli_auth_try")) |
| 33 | 198 return; |
| 199 | |
| 47 | 200 /* |
| 37 | 201 case USERAUTH_SUCCESS_RCVD: |
| 202 send_msg_service_request(SSH_SERVICE_CONNECTION); | |
| 203 cli_ses.state = SERVICE_CONN_REQ_SENT; | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
204 TRACE(("leave cli_sessionloop: sent ssh-connection service req")) |
| 37 | 205 return; |
| 206 | |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
207 case SERVICE_CONN_ACCEPT_RCVD: |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
208 cli_send_chansess_request(); |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
209 TRACE(("leave cli_sessionloop: cli_send_chansess_request")) |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
210 cli_ses.state = SESSION_RUNNING; |
|
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
211 return; |
| 47 | 212 */ |
|
45
9ee8996a375f
Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents:
43
diff
changeset
|
213 |
| 37 | 214 case USERAUTH_SUCCESS_RCVD: |
|
326
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
215 |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
216 if (cli_opts.backgrounded) { |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
217 int devnull; |
|
433
c216212001fc
Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents:
326
diff
changeset
|
218 /* keeping stdin open steals input from the terminal and |
|
c216212001fc
Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents:
326
diff
changeset
|
219 is confusing, though stdout/stderr could be useful. */ |
|
326
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
220 devnull = open(_PATH_DEVNULL, O_RDONLY); |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
221 if (devnull < 0) { |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
222 dropbear_exit("opening /dev/null: %d %s", |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
223 errno, strerror(errno)); |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
224 } |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
225 dup2(devnull, STDIN_FILENO); |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
226 if (daemon(0, 1) < 0) { |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
227 dropbear_exit("Backgrounding failed: %d %s", |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
228 errno, strerror(errno)); |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
229 } |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
230 } |
|
d965110e3f5c
add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
231 |
| 64 | 232 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 233 setup_localtcp(); | |
| 234 #endif | |
|
65
02e4a7f614f8
Oops, forgot to call the actual code.
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
235 #ifdef ENABLE_CLI_REMOTETCPFWD |
|
02e4a7f614f8
Oops, forgot to call the actual code.
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
236 setup_remotetcp(); |
|
02e4a7f614f8
Oops, forgot to call the actual code.
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
237 #endif |
|
325
0e4f225b7e07
Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents:
272
diff
changeset
|
238 if (!cli_opts.no_cmd) { |
|
0e4f225b7e07
Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents:
272
diff
changeset
|
239 cli_send_chansess_request(); |
|
0e4f225b7e07
Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents:
272
diff
changeset
|
240 } |
|
0e4f225b7e07
Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents:
272
diff
changeset
|
241 TRACE(("leave cli_sessionloop: running")) |
| 37 | 242 cli_ses.state = SESSION_RUNNING; |
| 243 return; | |
| 244 | |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
245 case SESSION_RUNNING: |
|
325
0e4f225b7e07
Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents:
272
diff
changeset
|
246 if (ses.chancount < 1 && !cli_opts.no_cmd) { |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
247 cli_finished(); |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
248 } |
|
41
18eccbfb9641
added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents:
40
diff
changeset
|
249 |
|
18eccbfb9641
added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents:
40
diff
changeset
|
250 if (cli_ses.winchange) { |
|
18eccbfb9641
added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents:
40
diff
changeset
|
251 cli_chansess_winchange(); |
|
18eccbfb9641
added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents:
40
diff
changeset
|
252 } |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
253 return; |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
254 |
| 33 | 255 /* XXX more here needed */ |
| 256 | |
| 257 | |
| 258 default: | |
| 259 break; | |
| 26 | 260 } |
| 261 | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
136
diff
changeset
|
262 TRACE(("leave cli_sessionloop: fell out")) |
| 26 | 263 |
| 264 } | |
| 265 | |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
266 void cli_session_cleanup() { |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
267 |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
268 if (!sessinitdone) { |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
269 return; |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
270 } |
|
99
0247fbd9379d
Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
271 |
|
175
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
272 /* Set std{in,out,err} back to non-blocking - busybox ash dies nastily if |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
273 * we don't revert the flags */ |
|
100
c72f5c10125d
oops, the fcntl() was commented out
Matt Johnston <matt@ucc.asn.au>
parents:
99
diff
changeset
|
274 fcntl(cli_ses.stdincopy, F_SETFL, cli_ses.stdinflags); |
|
175
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
275 fcntl(cli_ses.stdoutcopy, F_SETFL, cli_ses.stdoutflags); |
|
2c5741e4b855
* Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
276 fcntl(cli_ses.stderrcopy, F_SETFL, cli_ses.stderrflags); |
|
99
0247fbd9379d
Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
277 |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
278 cli_tty_cleanup(); |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
279 |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
280 } |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
281 |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
282 static void cli_finished() { |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
283 |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
284 cli_session_cleanup(); |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
285 common_session_cleanup(); |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
286 fprintf(stderr, "Connection to %s@%s:%s closed.\n", cli_opts.username, |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
287 cli_opts.remotehost, cli_opts.remoteport); |
|
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
107
diff
changeset
|
288 exit(cli_ses.retval); |
|
40
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
289 } |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
290 |
|
b4874d772210
- Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents:
39
diff
changeset
|
291 |
| 26 | 292 /* called when the remote side closes the connection */ |
| 293 static void cli_remoteclosed() { | |
| 294 | |
| 295 /* XXX TODO perhaps print a friendlier message if we get this but have | |
| 296 * already sent/received disconnect message(s) ??? */ | |
| 297 close(ses.sock); | |
| 298 ses.sock = -1; | |
| 33 | 299 dropbear_exit("remote closed the connection"); |
| 26 | 300 } |
| 43 | 301 |
| 302 /* Operates in-place turning dirty (untrusted potentially containing control | |
|
249
efbaf6b03837
added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents:
215
diff
changeset
|
303 * characters) text into clean text. |
|
efbaf6b03837
added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents:
215
diff
changeset
|
304 * Note: this is safe only with ascii - other charsets could have problems. */ |
| 43 | 305 void cleantext(unsigned char* dirtytext) { |
| 306 | |
| 307 unsigned int i, j; | |
| 47 | 308 unsigned char c; |
| 43 | 309 |
| 310 j = 0; | |
| 311 for (i = 0; dirtytext[i] != '\0'; i++) { | |
| 312 | |
| 313 c = dirtytext[i]; | |
| 314 /* We can ignore '\r's */ | |
| 315 if ( (c >= ' ' && c <= '~') || c == '\n' || c == '\t') { | |
| 316 dirtytext[j] = c; | |
| 317 j++; | |
| 318 } | |
| 319 } | |
| 320 /* Null terminate */ | |
| 321 dirtytext[j] = '\0'; | |
| 322 } |