Damien Miller | 58226f6 | 2008-03-07 18:33:30 +1100 | [diff] [blame] | 1 | /* $OpenBSD: clientloop.c,v 1.188 2008/02/22 20:44:02 dtucker Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 6 | * The main loop for the interactive session (client side). |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 7 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 8 | * As far as I am concerned, the code I have written for this software |
| 9 | * can be used freely for any purpose. Any derived versions of this |
| 10 | * software must be clearly marked as such, and if the derived work is |
| 11 | * incompatible with the protocol description in the RFC file, it must be |
| 12 | * called by a name other than "ssh" or "Secure Shell". |
| 13 | * |
| 14 | * |
| 15 | * Copyright (c) 1999 Theo de Raadt. All rights reserved. |
| 16 | * |
| 17 | * Redistribution and use in source and binary forms, with or without |
| 18 | * modification, are permitted provided that the following conditions |
| 19 | * are met: |
| 20 | * 1. Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * 2. Redistributions in binary form must reproduce the above copyright |
| 23 | * notice, this list of conditions and the following disclaimer in the |
| 24 | * documentation and/or other materials provided with the distribution. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 27 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 28 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 29 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 30 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 31 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 32 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 33 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 35 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | * |
| 37 | * |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 38 | * SSH2 support added by Markus Friedl. |
Ben Lindstrom | 4469723 | 2001-07-04 03:32:30 +0000 | [diff] [blame] | 39 | * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 40 | * |
| 41 | * Redistribution and use in source and binary forms, with or without |
| 42 | * modification, are permitted provided that the following conditions |
| 43 | * are met: |
| 44 | * 1. Redistributions of source code must retain the above copyright |
| 45 | * notice, this list of conditions and the following disclaimer. |
| 46 | * 2. Redistributions in binary form must reproduce the above copyright |
| 47 | * notice, this list of conditions and the following disclaimer in the |
| 48 | * documentation and/or other materials provided with the distribution. |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 51 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 52 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 53 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 54 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 55 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 56 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 57 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 58 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 59 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 60 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 61 | |
| 62 | #include "includes.h" |
Damien Miller | 17e91c0 | 2006-03-15 11:28:34 +1100 | [diff] [blame] | 63 | |
Damien Miller | f17883e | 2006-03-15 11:45:54 +1100 | [diff] [blame] | 64 | #include <sys/types.h> |
Damien Miller | 9aec919 | 2006-08-05 10:57:45 +1000 | [diff] [blame] | 65 | #include <sys/ioctl.h> |
Damien Miller | 8dbffe7 | 2006-08-05 11:02:17 +1000 | [diff] [blame] | 66 | #include <sys/param.h> |
Damien Miller | f17883e | 2006-03-15 11:45:54 +1100 | [diff] [blame] | 67 | #ifdef HAVE_SYS_STAT_H |
| 68 | # include <sys/stat.h> |
| 69 | #endif |
Damien Miller | 9aec919 | 2006-08-05 10:57:45 +1000 | [diff] [blame] | 70 | #ifdef HAVE_SYS_TIME_H |
| 71 | # include <sys/time.h> |
| 72 | #endif |
Damien Miller | e3b60b5 | 2006-07-10 21:08:03 +1000 | [diff] [blame] | 73 | #include <sys/socket.h> |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 74 | |
Damien Miller | c7b0636 | 2006-03-15 11:53:45 +1100 | [diff] [blame] | 75 | #include <ctype.h> |
Darren Tucker | 3997249 | 2006-07-12 22:22:46 +1000 | [diff] [blame] | 76 | #include <errno.h> |
Damien Miller | 6645e7a | 2006-03-15 14:42:54 +1100 | [diff] [blame] | 77 | #ifdef HAVE_PATHS_H |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 78 | #include <paths.h> |
Damien Miller | 6645e7a | 2006-03-15 14:42:54 +1100 | [diff] [blame] | 79 | #endif |
Damien Miller | 6ff3cad | 2006-03-15 11:52:09 +1100 | [diff] [blame] | 80 | #include <signal.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 81 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 82 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 83 | #include <stdlib.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 84 | #include <string.h> |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 85 | #include <termios.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 86 | #include <pwd.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 87 | #include <unistd.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 88 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 89 | #include "xmalloc.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 90 | #include "ssh.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 91 | #include "ssh1.h" |
| 92 | #include "ssh2.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 93 | #include "packet.h" |
| 94 | #include "buffer.h" |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 95 | #include "compat.h" |
Ben Lindstrom | c763767 | 2001-06-09 00:36:26 +0000 | [diff] [blame] | 96 | #include "channels.h" |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 97 | #include "dispatch.h" |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 98 | #include "key.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 99 | #include "cipher.h" |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 100 | #include "kex.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 101 | #include "log.h" |
| 102 | #include "readconf.h" |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 103 | #include "clientloop.h" |
Damien Miller | aeb31d6 | 2005-12-13 19:29:36 +1100 | [diff] [blame] | 104 | #include "sshconnect.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 105 | #include "authfd.h" |
| 106 | #include "atomicio.h" |
Darren Tucker | 06f2bd8 | 2004-05-13 16:06:46 +1000 | [diff] [blame] | 107 | #include "sshpty.h" |
Ben Lindstrom | 302ea6f | 2001-04-16 02:01:25 +0000 | [diff] [blame] | 108 | #include "misc.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 109 | #include "monitor_fdpass.h" |
| 110 | #include "match.h" |
| 111 | #include "msg.h" |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 112 | |
| 113 | /* import options */ |
| 114 | extern Options options; |
| 115 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 116 | /* Flag indicating that stdin should be redirected from /dev/null. */ |
| 117 | extern int stdin_null_flag; |
| 118 | |
Damien Miller | d696551 | 2003-12-17 16:31:53 +1100 | [diff] [blame] | 119 | /* Flag indicating that no shell has been requested */ |
| 120 | extern int no_shell_flag; |
| 121 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 122 | /* Control socket */ |
| 123 | extern int control_fd; |
| 124 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 125 | /* |
| 126 | * Name of the host we are connecting to. This is the name given on the |
| 127 | * command line, or the HostName specified for the user-supplied name in a |
| 128 | * configuration file. |
| 129 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 130 | extern char *host; |
| 131 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 132 | /* |
| 133 | * Flag to indicate that we have received a window change signal which has |
| 134 | * not yet been processed. This will cause a message indicating the new |
| 135 | * window size to be sent to the server a little later. This is volatile |
| 136 | * because this is updated in a signal handler. |
| 137 | */ |
Ben Lindstrom | 5e71c54 | 2001-12-06 16:48:14 +0000 | [diff] [blame] | 138 | static volatile sig_atomic_t received_window_change_signal = 0; |
| 139 | static volatile sig_atomic_t received_signal = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 140 | |
Damien Miller | 788f212 | 2005-11-05 15:14:59 +1100 | [diff] [blame] | 141 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 142 | static int in_non_blocking_mode = 0; |
| 143 | |
| 144 | /* Common data for the client loop code. */ |
Damien Miller | 97c91f6 | 2006-04-23 12:08:37 +1000 | [diff] [blame] | 145 | static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 146 | static int escape_char; /* Escape character. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 147 | static int escape_pending; /* Last character was the escape character */ |
| 148 | static int last_was_cr; /* Last character was a newline. */ |
| 149 | static int exit_status; /* Used to store the exit status of the command. */ |
| 150 | static int stdin_eof; /* EOF has been encountered on standard error. */ |
| 151 | static Buffer stdin_buffer; /* Buffer for stdin data. */ |
| 152 | static Buffer stdout_buffer; /* Buffer for stdout data. */ |
| 153 | static Buffer stderr_buffer; /* Buffer for stderr data. */ |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 154 | static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
| 155 | static u_int buffer_high;/* Soft max buffer size. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 156 | static int connection_in; /* Connection to server (input). */ |
| 157 | static int connection_out; /* Connection to server (output). */ |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 158 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 159 | static int session_closed = 0; /* In SSH2: login session closed. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 160 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 161 | static void client_init_dispatch(void); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 162 | int session_ident = -1; |
| 163 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 164 | struct confirm_ctx { |
| 165 | int want_tty; |
| 166 | int want_subsys; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 167 | int want_x_fwd; |
| 168 | int want_agent_fwd; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 169 | Buffer cmd; |
| 170 | char *term; |
| 171 | struct termios tio; |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 172 | char **env; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 173 | }; |
| 174 | |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 175 | /*XXX*/ |
| 176 | extern Kex *xxx_kex; |
| 177 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 178 | void ssh_process_session2_setup(int, int, int, Buffer *); |
| 179 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 180 | /* Restores stdin to blocking mode. */ |
| 181 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 182 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 183 | leave_non_blocking(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 184 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 185 | if (in_non_blocking_mode) { |
Damien Miller | 03e66f6 | 2004-06-15 15:47:51 +1000 | [diff] [blame] | 186 | unset_nonblock(fileno(stdin)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 187 | in_non_blocking_mode = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 188 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 189 | } |
| 190 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 191 | /* Puts stdin terminal in non-blocking mode. */ |
| 192 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 193 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 194 | enter_non_blocking(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 195 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 196 | in_non_blocking_mode = 1; |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 197 | set_nonblock(fileno(stdin)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 198 | } |
| 199 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 200 | /* |
| 201 | * Signal handler for the window change signal (SIGWINCH). This just sets a |
| 202 | * flag indicating that the window has changed. |
| 203 | */ |
Damien Miller | f0b15df | 2006-03-26 13:59:20 +1100 | [diff] [blame] | 204 | /*ARGSUSED */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 205 | static void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 206 | window_change_handler(int sig) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 207 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 208 | received_window_change_signal = 1; |
| 209 | signal(SIGWINCH, window_change_handler); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 210 | } |
| 211 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 212 | /* |
| 213 | * Signal handler for signals that cause the program to terminate. These |
| 214 | * signals must be trapped to restore terminal modes. |
| 215 | */ |
Damien Miller | f0b15df | 2006-03-26 13:59:20 +1100 | [diff] [blame] | 216 | /*ARGSUSED */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 217 | static void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 218 | signal_handler(int sig) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 219 | { |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 220 | received_signal = sig; |
| 221 | quit_pending = 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 222 | } |
| 223 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 224 | /* |
| 225 | * Returns current time in seconds from Jan 1, 1970 with the maximum |
| 226 | * available resolution. |
| 227 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 228 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 229 | static double |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 230 | get_current_time(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 231 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 232 | struct timeval tv; |
| 233 | gettimeofday(&tv, NULL); |
| 234 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 235 | } |
| 236 | |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 237 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
| 238 | void |
| 239 | client_x11_get_proto(const char *display, const char *xauth_path, |
| 240 | u_int trusted, char **_proto, char **_data) |
| 241 | { |
| 242 | char cmd[1024]; |
| 243 | char line[512]; |
| 244 | char xdisplay[512]; |
| 245 | static char proto[512], data[512]; |
| 246 | FILE *f; |
| 247 | int got_data = 0, generated = 0, do_unlink = 0, i; |
| 248 | char *xauthdir, *xauthfile; |
| 249 | struct stat st; |
| 250 | |
| 251 | xauthdir = xauthfile = NULL; |
| 252 | *_proto = proto; |
| 253 | *_data = data; |
| 254 | proto[0] = data[0] = '\0'; |
| 255 | |
| 256 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { |
| 257 | debug("No xauth program."); |
| 258 | } else { |
| 259 | if (display == NULL) { |
| 260 | debug("x11_get_proto: DISPLAY not set"); |
| 261 | return; |
| 262 | } |
| 263 | /* |
| 264 | * Handle FamilyLocal case where $DISPLAY does |
| 265 | * not match an authorization entry. For this we |
| 266 | * just try "xauth list unix:displaynum.screennum". |
| 267 | * XXX: "localhost" match to determine FamilyLocal |
| 268 | * is not perfect. |
| 269 | */ |
| 270 | if (strncmp(display, "localhost:", 10) == 0) { |
| 271 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", |
| 272 | display + 10); |
| 273 | display = xdisplay; |
| 274 | } |
| 275 | if (trusted == 0) { |
| 276 | xauthdir = xmalloc(MAXPATHLEN); |
| 277 | xauthfile = xmalloc(MAXPATHLEN); |
| 278 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); |
| 279 | if (mkdtemp(xauthdir) != NULL) { |
| 280 | do_unlink = 1; |
| 281 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", |
| 282 | xauthdir); |
| 283 | snprintf(cmd, sizeof(cmd), |
| 284 | "%s -f %s generate %s " SSH_X11_PROTO |
| 285 | " untrusted timeout 1200 2>" _PATH_DEVNULL, |
| 286 | xauth_path, xauthfile, display); |
| 287 | debug2("x11_get_proto: %s", cmd); |
| 288 | if (system(cmd) == 0) |
| 289 | generated = 1; |
| 290 | } |
| 291 | } |
Darren Tucker | 513d13a | 2007-08-15 19:13:41 +1000 | [diff] [blame] | 292 | |
| 293 | /* |
| 294 | * When in untrusted mode, we read the cookie only if it was |
| 295 | * successfully generated as an untrusted one in the step |
| 296 | * above. |
| 297 | */ |
| 298 | if (trusted || generated) { |
| 299 | snprintf(cmd, sizeof(cmd), |
| 300 | "%s %s%s list %s 2>" _PATH_DEVNULL, |
| 301 | xauth_path, |
| 302 | generated ? "-f " : "" , |
| 303 | generated ? xauthfile : "", |
| 304 | display); |
| 305 | debug2("x11_get_proto: %s", cmd); |
| 306 | f = popen(cmd, "r"); |
| 307 | if (f && fgets(line, sizeof(line), f) && |
| 308 | sscanf(line, "%*s %511s %511s", proto, data) == 2) |
| 309 | got_data = 1; |
| 310 | if (f) |
| 311 | pclose(f); |
| 312 | } else |
| 313 | error("Warning: untrusted X11 forwarding setup failed: " |
| 314 | "xauth key data not generated"); |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | if (do_unlink) { |
| 318 | unlink(xauthfile); |
| 319 | rmdir(xauthdir); |
| 320 | } |
| 321 | if (xauthdir) |
| 322 | xfree(xauthdir); |
| 323 | if (xauthfile) |
| 324 | xfree(xauthfile); |
| 325 | |
| 326 | /* |
| 327 | * If we didn't get authentication data, just make up some |
| 328 | * data. The forwarding code will check the validity of the |
| 329 | * response anyway, and substitute this data. The X11 |
| 330 | * server, however, will ignore this fake data and use |
| 331 | * whatever authentication mechanisms it was using otherwise |
| 332 | * for the local connection. |
| 333 | */ |
| 334 | if (!got_data) { |
| 335 | u_int32_t rnd = 0; |
| 336 | |
| 337 | logit("Warning: No xauth data; " |
| 338 | "using fake authentication data for X11 forwarding."); |
| 339 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); |
| 340 | for (i = 0; i < 16; i++) { |
| 341 | if (i % 4 == 0) |
| 342 | rnd = arc4random(); |
| 343 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", |
| 344 | rnd & 0xff); |
| 345 | rnd >>= 8; |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 350 | /* |
| 351 | * This is called when the interactive is entered. This checks if there is |
| 352 | * an EOF coming on stdin. We must check this explicitly, as select() does |
| 353 | * not appear to wake up when redirecting from /dev/null. |
| 354 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 355 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 356 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 357 | client_check_initial_eof_on_stdin(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 358 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 359 | int len; |
| 360 | char buf[1]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 361 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 362 | /* |
| 363 | * If standard input is to be "redirected from /dev/null", we simply |
| 364 | * mark that we have seen an EOF and send an EOF message to the |
| 365 | * server. Otherwise, we try to read a single character; it appears |
| 366 | * that for some files, such /dev/null, select() never wakes up for |
| 367 | * read for this descriptor, which means that we never get EOF. This |
| 368 | * way we will get the EOF if stdin comes from /dev/null or similar. |
| 369 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 370 | if (stdin_null_flag) { |
| 371 | /* Fake EOF on stdin. */ |
| 372 | debug("Sending eof."); |
| 373 | stdin_eof = 1; |
| 374 | packet_start(SSH_CMSG_EOF); |
| 375 | packet_send(); |
| 376 | } else { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 377 | enter_non_blocking(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 378 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 379 | /* Check for immediate EOF on stdin. */ |
| 380 | len = read(fileno(stdin), buf, 1); |
| 381 | if (len == 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 382 | /* EOF. Record that we have seen it and send EOF to server. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 383 | debug("Sending eof."); |
| 384 | stdin_eof = 1; |
| 385 | packet_start(SSH_CMSG_EOF); |
| 386 | packet_send(); |
| 387 | } else if (len > 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 388 | /* |
| 389 | * Got data. We must store the data in the buffer, |
| 390 | * and also process it as an escape character if |
| 391 | * appropriate. |
| 392 | */ |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 393 | if ((u_char) buf[0] == escape_char) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 394 | escape_pending = 1; |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 395 | else |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 396 | buffer_append(&stdin_buffer, buf, 1); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 397 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 398 | leave_non_blocking(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 399 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 400 | } |
| 401 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 402 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 403 | /* |
| 404 | * Make packets from buffered stdin data, and buffer them for sending to the |
| 405 | * connection. |
| 406 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 407 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 408 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 409 | client_make_packets_from_stdin_data(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 410 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 411 | u_int len; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 412 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 413 | /* Send buffered stdin data to the server. */ |
| 414 | while (buffer_len(&stdin_buffer) > 0 && |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 415 | packet_not_very_much_data_to_write()) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 416 | len = buffer_len(&stdin_buffer); |
| 417 | /* Keep the packets at reasonable size. */ |
| 418 | if (len > packet_get_maxsize()) |
| 419 | len = packet_get_maxsize(); |
| 420 | packet_start(SSH_CMSG_STDIN_DATA); |
| 421 | packet_put_string(buffer_ptr(&stdin_buffer), len); |
| 422 | packet_send(); |
| 423 | buffer_consume(&stdin_buffer, len); |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 424 | stdin_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 425 | /* If we have a pending EOF, send it now. */ |
| 426 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { |
| 427 | packet_start(SSH_CMSG_EOF); |
| 428 | packet_send(); |
| 429 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 430 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 431 | } |
| 432 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 433 | /* |
| 434 | * Checks if the client window has changed, and sends a packet about it to |
| 435 | * the server if so. The actual change is detected elsewhere (by a software |
| 436 | * interrupt on Unix); this just checks the flag and sends a message if |
| 437 | * appropriate. |
| 438 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 439 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 440 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 441 | client_check_window_change(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 442 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 443 | struct winsize ws; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 444 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 445 | if (! received_window_change_signal) |
| 446 | return; |
| 447 | /** XXX race */ |
| 448 | received_window_change_signal = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 449 | |
Damien Miller | d344494 | 2000-09-30 14:20:03 +1100 | [diff] [blame] | 450 | debug2("client_check_window_change: changed"); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 451 | |
| 452 | if (compat20) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 453 | channel_send_window_changes(); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 454 | } else { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 455 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
| 456 | return; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 457 | packet_start(SSH_CMSG_WINDOW_SIZE); |
Damien Miller | 71a7367 | 2006-03-26 14:04:36 +1100 | [diff] [blame] | 458 | packet_put_int((u_int)ws.ws_row); |
| 459 | packet_put_int((u_int)ws.ws_col); |
| 460 | packet_put_int((u_int)ws.ws_xpixel); |
| 461 | packet_put_int((u_int)ws.ws_ypixel); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 462 | packet_send(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 463 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 464 | } |
| 465 | |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 466 | static void |
| 467 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) |
| 468 | { |
Damien Miller | 58226f6 | 2008-03-07 18:33:30 +1100 | [diff] [blame] | 469 | keep_alive_timeouts = 0; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 470 | client_global_request_reply_fwd(type, seq, ctxt); |
| 471 | } |
| 472 | |
| 473 | static void |
| 474 | server_alive_check(void) |
| 475 | { |
Damien Miller | 58226f6 | 2008-03-07 18:33:30 +1100 | [diff] [blame] | 476 | if (++keep_alive_timeouts > options.server_alive_count_max) { |
Damien Miller | 985a448 | 2006-10-24 03:02:41 +1000 | [diff] [blame] | 477 | logit("Timeout, server not responding."); |
| 478 | cleanup_exit(255); |
| 479 | } |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 480 | packet_start(SSH2_MSG_GLOBAL_REQUEST); |
| 481 | packet_put_cstring("keepalive@openssh.com"); |
| 482 | packet_put_char(1); /* boolean: want reply */ |
| 483 | packet_send(); |
| 484 | } |
| 485 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 486 | /* |
| 487 | * Waits until the client can do something (some data becomes available on |
| 488 | * one of the file descriptors). |
| 489 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 490 | static void |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 491 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
Darren Tucker | c7a6fc4 | 2004-08-13 21:18:00 +1000 | [diff] [blame] | 492 | int *maxfdp, u_int *nallocp, int rekeying) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 493 | { |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 494 | struct timeval tv, *tvp; |
| 495 | int ret; |
| 496 | |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 497 | /* Add any selections by the channel mechanism. */ |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 498 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 499 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 500 | if (!compat20) { |
| 501 | /* Read from the connection, unless our buffers are full. */ |
| 502 | if (buffer_len(&stdout_buffer) < buffer_high && |
| 503 | buffer_len(&stderr_buffer) < buffer_high && |
| 504 | channel_not_very_much_buffered_data()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 505 | FD_SET(connection_in, *readsetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 506 | /* |
| 507 | * Read from stdin, unless we have seen EOF or have very much |
| 508 | * buffered data to send to the server. |
| 509 | */ |
| 510 | if (!stdin_eof && packet_not_very_much_data_to_write()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 511 | FD_SET(fileno(stdin), *readsetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 512 | |
| 513 | /* Select stdout/stderr if have data in buffer. */ |
| 514 | if (buffer_len(&stdout_buffer) > 0) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 515 | FD_SET(fileno(stdout), *writesetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 516 | if (buffer_len(&stderr_buffer) > 0) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 517 | FD_SET(fileno(stderr), *writesetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 518 | } else { |
Ben Lindstrom | c8b3f47 | 2001-05-17 03:19:40 +0000 | [diff] [blame] | 519 | /* channel_prepare_select could have closed the last channel */ |
Damien Miller | 164a7f4 | 2001-10-12 11:36:09 +1000 | [diff] [blame] | 520 | if (session_closed && !channel_still_open() && |
| 521 | !packet_have_data_to_write()) { |
| 522 | /* clear mask since we did not call select() */ |
Damien Miller | 79faeff | 2001-11-12 11:06:32 +1100 | [diff] [blame] | 523 | memset(*readsetp, 0, *nallocp); |
| 524 | memset(*writesetp, 0, *nallocp); |
Damien Miller | 164a7f4 | 2001-10-12 11:36:09 +1000 | [diff] [blame] | 525 | return; |
Ben Lindstrom | c8b3f47 | 2001-05-17 03:19:40 +0000 | [diff] [blame] | 526 | } else { |
| 527 | FD_SET(connection_in, *readsetp); |
| 528 | } |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 529 | } |
| 530 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 531 | /* Select server connection if have data to write to the server. */ |
| 532 | if (packet_have_data_to_write()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 533 | FD_SET(connection_out, *writesetp); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 534 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 535 | if (control_fd != -1) |
| 536 | FD_SET(control_fd, *readsetp); |
| 537 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 538 | /* |
| 539 | * Wait for something to happen. This will suspend the process until |
| 540 | * some selected descriptor can be read, written, or has some other |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 541 | * event pending. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 542 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 543 | |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 544 | if (options.server_alive_interval == 0 || !compat20) |
| 545 | tvp = NULL; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 546 | else { |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 547 | tv.tv_sec = options.server_alive_interval; |
| 548 | tv.tv_usec = 0; |
| 549 | tvp = &tv; |
| 550 | } |
| 551 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); |
| 552 | if (ret < 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 553 | char buf[100]; |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 554 | |
| 555 | /* |
| 556 | * We have to clear the select masks, because we return. |
| 557 | * We have to return, because the mainloop checks for the flags |
| 558 | * set by the signal handlers. |
| 559 | */ |
Damien Miller | 79faeff | 2001-11-12 11:06:32 +1100 | [diff] [blame] | 560 | memset(*readsetp, 0, *nallocp); |
| 561 | memset(*writesetp, 0, *nallocp); |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 562 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 563 | if (errno == EINTR) |
| 564 | return; |
| 565 | /* Note: we might still have data in the buffers. */ |
| 566 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); |
| 567 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 568 | quit_pending = 1; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 569 | } else if (ret == 0) |
| 570 | server_alive_check(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 571 | } |
| 572 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 573 | static void |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 574 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 575 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 576 | /* Flush stdout and stderr buffers. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 577 | if (buffer_len(bout) > 0) |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 578 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 579 | if (buffer_len(berr) > 0) |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 580 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 581 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 582 | leave_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 583 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 584 | /* |
| 585 | * Free (and clear) the buffer to reduce the amount of data that gets |
| 586 | * written to swap. |
| 587 | */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 588 | buffer_free(bin); |
| 589 | buffer_free(bout); |
| 590 | buffer_free(berr); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 591 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 592 | /* Send the suspend signal to the program itself. */ |
| 593 | kill(getpid(), SIGTSTP); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 594 | |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 595 | /* Reset window sizes in case they have changed */ |
| 596 | received_window_change_signal = 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 597 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 598 | /* OK, we have been continued by the user. Reinitialize buffers. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 599 | buffer_init(bin); |
| 600 | buffer_init(bout); |
| 601 | buffer_init(berr); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 602 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 603 | enter_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 604 | } |
| 605 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 606 | static void |
Damien Miller | 90fdfaf | 2006-03-26 14:25:37 +1100 | [diff] [blame] | 607 | client_process_net_input(fd_set *readset) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 608 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 609 | int len; |
| 610 | char buf[8192]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 611 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 612 | /* |
| 613 | * Read input from the server, and add any such data to the buffer of |
| 614 | * the packet subsystem. |
| 615 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 616 | if (FD_ISSET(connection_in, readset)) { |
| 617 | /* Read as much as possible. */ |
| 618 | len = read(connection_in, buf, sizeof(buf)); |
| 619 | if (len == 0) { |
| 620 | /* Received EOF. The remote host has closed the connection. */ |
| 621 | snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", |
| 622 | host); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 623 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 624 | quit_pending = 1; |
| 625 | return; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 626 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 627 | /* |
| 628 | * There is a kernel bug on Solaris that causes select to |
| 629 | * sometimes wake up even though there is no data available. |
| 630 | */ |
Ben Lindstrom | ebc8827 | 2001-03-06 03:34:40 +0000 | [diff] [blame] | 631 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 632 | len = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 633 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 634 | if (len < 0) { |
| 635 | /* An error has encountered. Perhaps there is a network problem. */ |
| 636 | snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", |
| 637 | host, strerror(errno)); |
| 638 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 639 | quit_pending = 1; |
| 640 | return; |
| 641 | } |
| 642 | packet_process_incoming(buf, len); |
| 643 | } |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 644 | } |
| 645 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 646 | static void |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 647 | client_subsystem_reply(int type, u_int32_t seq, void *ctxt) |
| 648 | { |
| 649 | int id; |
| 650 | Channel *c; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 651 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 652 | id = packet_get_int(); |
| 653 | packet_check_eom(); |
| 654 | |
| 655 | if ((c = channel_lookup(id)) == NULL) { |
| 656 | error("%s: no channel for id %d", __func__, id); |
| 657 | return; |
| 658 | } |
| 659 | |
| 660 | if (type == SSH2_MSG_CHANNEL_SUCCESS) |
| 661 | debug2("Request suceeded on channel %d", id); |
| 662 | else if (type == SSH2_MSG_CHANNEL_FAILURE) { |
| 663 | error("Request failed on channel %d", id); |
| 664 | channel_free(c); |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | static void |
| 669 | client_extra_session2_setup(int id, void *arg) |
| 670 | { |
| 671 | struct confirm_ctx *cctx = arg; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 672 | const char *display; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 673 | Channel *c; |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 674 | int i; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 675 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 676 | if (cctx == NULL) |
| 677 | fatal("%s: cctx == NULL", __func__); |
| 678 | if ((c = channel_lookup(id)) == NULL) |
| 679 | fatal("%s: no channel for id %d", __func__, id); |
| 680 | |
Damien Miller | 46d38de | 2005-07-17 17:02:09 +1000 | [diff] [blame] | 681 | display = getenv("DISPLAY"); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 682 | if (cctx->want_x_fwd && options.forward_x11 && display != NULL) { |
| 683 | char *proto, *data; |
| 684 | /* Get reasonable local authentication information. */ |
| 685 | client_x11_get_proto(display, options.xauth_location, |
| 686 | options.forward_x11_trusted, &proto, &data); |
| 687 | /* Request forwarding with authentication spoofing. */ |
| 688 | debug("Requesting X11 forwarding with authentication spoofing."); |
| 689 | x11_request_forwarding_with_spoofing(id, display, proto, data); |
| 690 | /* XXX wait for reply */ |
| 691 | } |
| 692 | |
| 693 | if (cctx->want_agent_fwd && options.forward_agent) { |
| 694 | debug("Requesting authentication agent forwarding."); |
| 695 | channel_request_start(id, "auth-agent-req@openssh.com", 0); |
| 696 | packet_send(); |
| 697 | } |
| 698 | |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 699 | client_session2_setup(id, cctx->want_tty, cctx->want_subsys, |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 700 | cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env, |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 701 | client_subsystem_reply); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 702 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 703 | c->confirm_ctx = NULL; |
| 704 | buffer_free(&cctx->cmd); |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 705 | xfree(cctx->term); |
| 706 | if (cctx->env != NULL) { |
| 707 | for (i = 0; cctx->env[i] != NULL; i++) |
| 708 | xfree(cctx->env[i]); |
| 709 | xfree(cctx->env); |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 710 | } |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 711 | xfree(cctx); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | static void |
Damien Miller | 90fdfaf | 2006-03-26 14:25:37 +1100 | [diff] [blame] | 715 | client_process_control(fd_set *readset) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 716 | { |
| 717 | Buffer m; |
| 718 | Channel *c; |
Darren Tucker | d04188e | 2007-02-25 20:36:49 +1100 | [diff] [blame] | 719 | int client_fd, new_fd[3], ver, allowed, window, packetmax; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 720 | socklen_t addrlen; |
| 721 | struct sockaddr_storage addr; |
| 722 | struct confirm_ctx *cctx; |
| 723 | char *cmd; |
Damien Miller | 54fd7cf | 2007-09-17 12:04:08 +1000 | [diff] [blame] | 724 | u_int i, j, len, env_len, command, flags; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 725 | uid_t euid; |
| 726 | gid_t egid; |
| 727 | |
| 728 | /* |
| 729 | * Accept connection on control socket |
| 730 | */ |
| 731 | if (control_fd == -1 || !FD_ISSET(control_fd, readset)) |
| 732 | return; |
| 733 | |
| 734 | memset(&addr, 0, sizeof(addr)); |
| 735 | addrlen = sizeof(addr); |
| 736 | if ((client_fd = accept(control_fd, |
| 737 | (struct sockaddr*)&addr, &addrlen)) == -1) { |
| 738 | error("%s accept: %s", __func__, strerror(errno)); |
| 739 | return; |
| 740 | } |
| 741 | |
| 742 | if (getpeereid(client_fd, &euid, &egid) < 0) { |
| 743 | error("%s getpeereid failed: %s", __func__, strerror(errno)); |
| 744 | close(client_fd); |
| 745 | return; |
| 746 | } |
| 747 | if ((euid != 0) && (getuid() != euid)) { |
| 748 | error("control mode uid mismatch: peer euid %u != uid %u", |
| 749 | (u_int) euid, (u_int) getuid()); |
| 750 | close(client_fd); |
| 751 | return; |
| 752 | } |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 753 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 754 | unset_nonblock(client_fd); |
| 755 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 756 | /* Read command */ |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 757 | buffer_init(&m); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 758 | if (ssh_msg_recv(client_fd, &m) == -1) { |
| 759 | error("%s: client msg_recv failed", __func__); |
| 760 | close(client_fd); |
| 761 | buffer_free(&m); |
| 762 | return; |
| 763 | } |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 764 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 765 | error("%s: wrong client version %d", __func__, ver); |
| 766 | buffer_free(&m); |
| 767 | close(client_fd); |
| 768 | return; |
| 769 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 770 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 771 | allowed = 1; |
| 772 | command = buffer_get_int(&m); |
| 773 | flags = buffer_get_int(&m); |
| 774 | |
| 775 | buffer_clear(&m); |
| 776 | |
| 777 | switch (command) { |
| 778 | case SSHMUX_COMMAND_OPEN: |
Damien Miller | d14b1e7 | 2005-06-16 13:19:41 +1000 | [diff] [blame] | 779 | if (options.control_master == SSHCTL_MASTER_ASK || |
| 780 | options.control_master == SSHCTL_MASTER_AUTO_ASK) |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 781 | allowed = ask_permission("Allow shared connection " |
| 782 | "to %s? ", host); |
| 783 | /* continue below */ |
| 784 | break; |
| 785 | case SSHMUX_COMMAND_TERMINATE: |
Damien Miller | d14b1e7 | 2005-06-16 13:19:41 +1000 | [diff] [blame] | 786 | if (options.control_master == SSHCTL_MASTER_ASK || |
| 787 | options.control_master == SSHCTL_MASTER_AUTO_ASK) |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 788 | allowed = ask_permission("Terminate shared connection " |
| 789 | "to %s? ", host); |
| 790 | if (allowed) |
| 791 | quit_pending = 1; |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 792 | /* FALLTHROUGH */ |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 793 | case SSHMUX_COMMAND_ALIVE_CHECK: |
| 794 | /* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */ |
| 795 | buffer_clear(&m); |
| 796 | buffer_put_int(&m, allowed); |
| 797 | buffer_put_int(&m, getpid()); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 798 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 799 | error("%s: client msg_send failed", __func__); |
| 800 | close(client_fd); |
| 801 | buffer_free(&m); |
| 802 | return; |
| 803 | } |
| 804 | buffer_free(&m); |
| 805 | close(client_fd); |
| 806 | return; |
| 807 | default: |
| 808 | error("Unsupported command %d", command); |
| 809 | buffer_free(&m); |
| 810 | close(client_fd); |
| 811 | return; |
| 812 | } |
| 813 | |
| 814 | /* Reply for SSHMUX_COMMAND_OPEN */ |
| 815 | buffer_clear(&m); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 816 | buffer_put_int(&m, allowed); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 817 | buffer_put_int(&m, getpid()); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 818 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 819 | error("%s: client msg_send failed", __func__); |
| 820 | close(client_fd); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 821 | buffer_free(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 822 | return; |
| 823 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 824 | |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 825 | if (!allowed) { |
| 826 | error("Refused control connection"); |
| 827 | close(client_fd); |
| 828 | buffer_free(&m); |
| 829 | return; |
| 830 | } |
| 831 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 832 | buffer_clear(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 833 | if (ssh_msg_recv(client_fd, &m) == -1) { |
| 834 | error("%s: client msg_recv failed", __func__); |
| 835 | close(client_fd); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 836 | buffer_free(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 837 | return; |
| 838 | } |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 839 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 840 | error("%s: wrong client version %d", __func__, ver); |
| 841 | buffer_free(&m); |
| 842 | close(client_fd); |
| 843 | return; |
| 844 | } |
| 845 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 846 | cctx = xcalloc(1, sizeof(*cctx)); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 847 | cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0; |
| 848 | cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 849 | cctx->want_x_fwd = (flags & SSHMUX_FLAG_X11_FWD) != 0; |
| 850 | cctx->want_agent_fwd = (flags & SSHMUX_FLAG_AGENT_FWD) != 0; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 851 | cctx->term = buffer_get_string(&m, &len); |
| 852 | |
| 853 | cmd = buffer_get_string(&m, &len); |
| 854 | buffer_init(&cctx->cmd); |
| 855 | buffer_append(&cctx->cmd, cmd, strlen(cmd)); |
| 856 | |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 857 | env_len = buffer_get_int(&m); |
| 858 | env_len = MIN(env_len, 4096); |
| 859 | debug3("%s: receiving %d env vars", __func__, env_len); |
| 860 | if (env_len != 0) { |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 861 | cctx->env = xcalloc(env_len + 1, sizeof(*cctx->env)); |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 862 | for (i = 0; i < env_len; i++) |
| 863 | cctx->env[i] = buffer_get_string(&m, &len); |
| 864 | cctx->env[i] = NULL; |
| 865 | } |
| 866 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 867 | debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__, |
| 868 | cctx->want_tty, cctx->want_subsys, cmd); |
Damien Miller | 24fd8dd | 2006-06-13 13:00:09 +1000 | [diff] [blame] | 869 | xfree(cmd); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 870 | |
| 871 | /* Gather fds from client */ |
Damien Miller | 54fd7cf | 2007-09-17 12:04:08 +1000 | [diff] [blame] | 872 | for(i = 0; i < 3; i++) { |
| 873 | if ((new_fd[i] = mm_receive_fd(client_fd)) == -1) { |
| 874 | error("%s: failed to receive fd %d from slave", |
| 875 | __func__, i); |
| 876 | for (j = 0; j < i; j++) |
| 877 | close(new_fd[j]); |
| 878 | for (j = 0; j < env_len; j++) |
| 879 | xfree(cctx->env[j]); |
| 880 | if (env_len > 0) |
| 881 | xfree(cctx->env); |
| 882 | xfree(cctx->term); |
| 883 | buffer_free(&cctx->cmd); |
Damien Miller | b82f5dd | 2008-02-10 22:22:53 +1100 | [diff] [blame] | 884 | close(client_fd); |
Damien Miller | 54fd7cf | 2007-09-17 12:04:08 +1000 | [diff] [blame] | 885 | xfree(cctx); |
| 886 | return; |
| 887 | } |
| 888 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 889 | |
| 890 | debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__, |
| 891 | new_fd[0], new_fd[1], new_fd[2]); |
| 892 | |
| 893 | /* Try to pick up ttymodes from client before it goes raw */ |
| 894 | if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) |
| 895 | error("%s: tcgetattr: %s", __func__, strerror(errno)); |
| 896 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 897 | /* This roundtrip is just for synchronisation of ttymodes */ |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 898 | buffer_clear(&m); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 899 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 900 | error("%s: client msg_send failed", __func__); |
| 901 | close(client_fd); |
| 902 | close(new_fd[0]); |
| 903 | close(new_fd[1]); |
| 904 | close(new_fd[2]); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 905 | buffer_free(&m); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 906 | xfree(cctx->term); |
| 907 | if (env_len != 0) { |
| 908 | for (i = 0; i < env_len; i++) |
| 909 | xfree(cctx->env[i]); |
| 910 | xfree(cctx->env); |
| 911 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 912 | return; |
| 913 | } |
| 914 | buffer_free(&m); |
| 915 | |
| 916 | /* enable nonblocking unless tty */ |
| 917 | if (!isatty(new_fd[0])) |
| 918 | set_nonblock(new_fd[0]); |
| 919 | if (!isatty(new_fd[1])) |
| 920 | set_nonblock(new_fd[1]); |
| 921 | if (!isatty(new_fd[2])) |
| 922 | set_nonblock(new_fd[2]); |
| 923 | |
| 924 | set_nonblock(client_fd); |
| 925 | |
Darren Tucker | d04188e | 2007-02-25 20:36:49 +1100 | [diff] [blame] | 926 | window = CHAN_SES_WINDOW_DEFAULT; |
| 927 | packetmax = CHAN_SES_PACKET_DEFAULT; |
| 928 | if (cctx->want_tty) { |
| 929 | window >>= 1; |
| 930 | packetmax >>= 1; |
| 931 | } |
| 932 | |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 933 | c = channel_new("session", SSH_CHANNEL_OPENING, |
Darren Tucker | d04188e | 2007-02-25 20:36:49 +1100 | [diff] [blame] | 934 | new_fd[0], new_fd[1], new_fd[2], window, packetmax, |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 935 | CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0); |
| 936 | |
| 937 | /* XXX */ |
| 938 | c->ctl_fd = client_fd; |
| 939 | |
| 940 | debug3("%s: channel_new: %d", __func__, c->self); |
| 941 | |
| 942 | channel_send_open(c->self); |
| 943 | channel_register_confirm(c->self, client_extra_session2_setup, cctx); |
| 944 | } |
| 945 | |
| 946 | static void |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 947 | process_cmdline(void) |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 948 | { |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 949 | void (*handler)(int); |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 950 | char *s, *cmd, *cancel_host; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 951 | int delete = 0; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 952 | int local = 0; |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 953 | u_short cancel_port; |
| 954 | Forward fwd; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 955 | |
Darren Tucker | 23ae8ca | 2007-12-02 23:12:30 +1100 | [diff] [blame] | 956 | bzero(&fwd, sizeof(fwd)); |
| 957 | fwd.listen_host = fwd.connect_host = NULL; |
| 958 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 959 | leave_raw_mode(); |
Ben Lindstrom | 5a6abda | 2002-06-09 19:41:48 +0000 | [diff] [blame] | 960 | handler = signal(SIGINT, SIG_IGN); |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 961 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 962 | if (s == NULL) |
| 963 | goto out; |
Darren Tucker | 03b1cdb | 2007-03-21 20:46:03 +1100 | [diff] [blame] | 964 | while (isspace(*s)) |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 965 | s++; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 966 | if (*s == '-') |
| 967 | s++; /* Skip cmdline '-', if any */ |
Darren Tucker | e167582 | 2004-05-24 10:13:07 +1000 | [diff] [blame] | 968 | if (*s == '\0') |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 969 | goto out; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 970 | |
Darren Tucker | 1973c88 | 2004-05-24 10:34:36 +1000 | [diff] [blame] | 971 | if (*s == 'h' || *s == 'H' || *s == '?') { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 972 | logit("Commands:"); |
Damien Miller | 4302095 | 2006-07-10 20:16:12 +1000 | [diff] [blame] | 973 | logit(" -L[bind_address:]port:host:hostport " |
| 974 | "Request local forward"); |
| 975 | logit(" -R[bind_address:]port:host:hostport " |
| 976 | "Request remote forward"); |
Damien Miller | 57e8ad3 | 2006-07-10 20:20:52 +1000 | [diff] [blame] | 977 | logit(" -KR[bind_address:]port " |
Damien Miller | 4302095 | 2006-07-10 20:16:12 +1000 | [diff] [blame] | 978 | "Cancel remote forward"); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 979 | if (!options.permit_local_command) |
| 980 | goto out; |
Damien Miller | 4302095 | 2006-07-10 20:16:12 +1000 | [diff] [blame] | 981 | logit(" !args " |
| 982 | "Execute local command"); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 983 | goto out; |
| 984 | } |
| 985 | |
| 986 | if (*s == '!' && options.permit_local_command) { |
| 987 | s++; |
| 988 | ssh_local_cmd(s); |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 989 | goto out; |
| 990 | } |
| 991 | |
| 992 | if (*s == 'K') { |
| 993 | delete = 1; |
| 994 | s++; |
| 995 | } |
| 996 | if (*s != 'L' && *s != 'R') { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 997 | logit("Invalid command."); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 998 | goto out; |
| 999 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1000 | if (*s == 'L') |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1001 | local = 1; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1002 | if (local && delete) { |
| 1003 | logit("Not supported."); |
| 1004 | goto out; |
| 1005 | } |
| 1006 | if ((!local || delete) && !compat20) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 1007 | logit("Not supported for SSH protocol version 1."); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1008 | goto out; |
| 1009 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1010 | |
Darren Tucker | 03b1cdb | 2007-03-21 20:46:03 +1100 | [diff] [blame] | 1011 | while (isspace(*++s)) |
| 1012 | ; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1013 | |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1014 | if (delete) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1015 | cancel_port = 0; |
| 1016 | cancel_host = hpdelim(&s); /* may be NULL */ |
| 1017 | if (s != NULL) { |
| 1018 | cancel_port = a2port(s); |
| 1019 | cancel_host = cleanhostname(cancel_host); |
| 1020 | } else { |
| 1021 | cancel_port = a2port(cancel_host); |
| 1022 | cancel_host = NULL; |
| 1023 | } |
| 1024 | if (cancel_port == 0) { |
| 1025 | logit("Bad forwarding close port"); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1026 | goto out; |
| 1027 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1028 | channel_request_rforward_cancel(cancel_host, cancel_port); |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1029 | } else { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1030 | if (!parse_forward(&fwd, s)) { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1031 | logit("Bad forwarding specification."); |
| 1032 | goto out; |
| 1033 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1034 | if (local) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1035 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
| 1036 | fwd.listen_port, fwd.connect_host, |
| 1037 | fwd.connect_port, options.gateway_ports) < 0) { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1038 | logit("Port forwarding failed."); |
| 1039 | goto out; |
| 1040 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1041 | } else { |
Darren Tucker | e7d4b19 | 2006-07-12 22:17:10 +1000 | [diff] [blame] | 1042 | if (channel_request_remote_forwarding(fwd.listen_host, |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1043 | fwd.listen_port, fwd.connect_host, |
Darren Tucker | e7d4b19 | 2006-07-12 22:17:10 +1000 | [diff] [blame] | 1044 | fwd.connect_port) < 0) { |
| 1045 | logit("Port forwarding failed."); |
| 1046 | goto out; |
| 1047 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1048 | } |
| 1049 | |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 1050 | logit("Forwarding port."); |
| 1051 | } |
| 1052 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1053 | out: |
| 1054 | signal(SIGINT, handler); |
| 1055 | enter_raw_mode(); |
| 1056 | if (cmd) |
| 1057 | xfree(cmd); |
Darren Tucker | 23ae8ca | 2007-12-02 23:12:30 +1100 | [diff] [blame] | 1058 | if (fwd.listen_host != NULL) |
| 1059 | xfree(fwd.listen_host); |
| 1060 | if (fwd.connect_host != NULL) |
| 1061 | xfree(fwd.connect_host); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1064 | /* process the characters one by one */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1065 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1066 | process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len) |
| 1067 | { |
| 1068 | char string[1024]; |
| 1069 | pid_t pid; |
| 1070 | int bytes = 0; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1071 | u_int i; |
| 1072 | u_char ch; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1073 | char *s; |
| 1074 | |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 1075 | if (len <= 0) |
| 1076 | return (0); |
| 1077 | |
| 1078 | for (i = 0; i < (u_int)len; i++) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1079 | /* Get one character at a time. */ |
| 1080 | ch = buf[i]; |
| 1081 | |
| 1082 | if (escape_pending) { |
| 1083 | /* We have previously seen an escape character. */ |
| 1084 | /* Clear the flag now. */ |
| 1085 | escape_pending = 0; |
| 1086 | |
| 1087 | /* Process the escaped character. */ |
| 1088 | switch (ch) { |
| 1089 | case '.': |
| 1090 | /* Terminate the connection. */ |
| 1091 | snprintf(string, sizeof string, "%c.\r\n", escape_char); |
| 1092 | buffer_append(berr, string, strlen(string)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1093 | |
| 1094 | quit_pending = 1; |
| 1095 | return -1; |
| 1096 | |
| 1097 | case 'Z' - 64: |
| 1098 | /* Suspend the program. */ |
| 1099 | /* Print a message to that effect to the user. */ |
| 1100 | snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char); |
| 1101 | buffer_append(berr, string, strlen(string)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1102 | |
| 1103 | /* Restore terminal modes and suspend. */ |
| 1104 | client_suspend_self(bin, bout, berr); |
| 1105 | |
| 1106 | /* We have been continued. */ |
| 1107 | continue; |
| 1108 | |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1109 | case 'B': |
| 1110 | if (compat20) { |
| 1111 | snprintf(string, sizeof string, |
| 1112 | "%cB\r\n", escape_char); |
| 1113 | buffer_append(berr, string, |
| 1114 | strlen(string)); |
| 1115 | channel_request_start(session_ident, |
| 1116 | "break", 0); |
| 1117 | packet_put_int(1000); |
| 1118 | packet_send(); |
| 1119 | } |
| 1120 | continue; |
| 1121 | |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1122 | case 'R': |
Ben Lindstrom | 11bd899 | 2001-04-05 23:34:29 +0000 | [diff] [blame] | 1123 | if (compat20) { |
| 1124 | if (datafellows & SSH_BUG_NOREKEY) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 1125 | logit("Server does not support re-keying"); |
Ben Lindstrom | 11bd899 | 2001-04-05 23:34:29 +0000 | [diff] [blame] | 1126 | else |
| 1127 | need_rekeying = 1; |
| 1128 | } |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1129 | continue; |
| 1130 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1131 | case '&': |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1132 | /* |
| 1133 | * Detach the program (continue to serve connections, |
| 1134 | * but put in background and no more new connections). |
| 1135 | */ |
Damien Miller | 96507ef | 2001-11-12 10:52:25 +1100 | [diff] [blame] | 1136 | /* Restore tty modes. */ |
| 1137 | leave_raw_mode(); |
| 1138 | |
| 1139 | /* Stop listening for new connections. */ |
| 1140 | channel_stop_listening(); |
| 1141 | |
| 1142 | snprintf(string, sizeof string, |
| 1143 | "%c& [backgrounded]\n", escape_char); |
| 1144 | buffer_append(berr, string, strlen(string)); |
| 1145 | |
| 1146 | /* Fork into background. */ |
| 1147 | pid = fork(); |
| 1148 | if (pid < 0) { |
| 1149 | error("fork: %.100s", strerror(errno)); |
| 1150 | continue; |
| 1151 | } |
| 1152 | if (pid != 0) { /* This is the parent. */ |
| 1153 | /* The parent just exits. */ |
| 1154 | exit(0); |
| 1155 | } |
| 1156 | /* The child continues serving connections. */ |
| 1157 | if (compat20) { |
| 1158 | buffer_append(bin, "\004", 1); |
| 1159 | /* fake EOF on stdin */ |
| 1160 | return -1; |
| 1161 | } else if (!stdin_eof) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1162 | /* |
| 1163 | * Sending SSH_CMSG_EOF alone does not always appear |
| 1164 | * to be enough. So we try to send an EOF character |
| 1165 | * first. |
| 1166 | */ |
| 1167 | packet_start(SSH_CMSG_STDIN_DATA); |
| 1168 | packet_put_string("\004", 1); |
| 1169 | packet_send(); |
| 1170 | /* Close stdin. */ |
| 1171 | stdin_eof = 1; |
| 1172 | if (buffer_len(bin) == 0) { |
| 1173 | packet_start(SSH_CMSG_EOF); |
| 1174 | packet_send(); |
| 1175 | } |
| 1176 | } |
Damien Miller | 96507ef | 2001-11-12 10:52:25 +1100 | [diff] [blame] | 1177 | continue; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1178 | |
| 1179 | case '?': |
| 1180 | snprintf(string, sizeof string, |
| 1181 | "%c?\r\n\ |
| 1182 | Supported escape sequences:\r\n\ |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1183 | %c. - terminate connection\r\n\ |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1184 | %cB - send a BREAK to the remote system\r\n\ |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1185 | %cC - open a command line\r\n\ |
| 1186 | %cR - Request rekey (SSH protocol 2 only)\r\n\ |
| 1187 | %c^Z - suspend ssh\r\n\ |
| 1188 | %c# - list forwarded connections\r\n\ |
| 1189 | %c& - background ssh (when waiting for connections to terminate)\r\n\ |
| 1190 | %c? - this message\r\n\ |
| 1191 | %c%c - send the escape character by typing it twice\r\n\ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1192 | (Note that escapes are only recognized immediately after newline.)\r\n", |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1193 | escape_char, escape_char, escape_char, escape_char, |
| 1194 | escape_char, escape_char, escape_char, escape_char, |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1195 | escape_char, escape_char, escape_char); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1196 | buffer_append(berr, string, strlen(string)); |
| 1197 | continue; |
| 1198 | |
| 1199 | case '#': |
| 1200 | snprintf(string, sizeof string, "%c#\r\n", escape_char); |
| 1201 | buffer_append(berr, string, strlen(string)); |
| 1202 | s = channel_open_message(); |
| 1203 | buffer_append(berr, s, strlen(s)); |
| 1204 | xfree(s); |
| 1205 | continue; |
| 1206 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1207 | case 'C': |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 1208 | process_cmdline(); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1209 | continue; |
| 1210 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1211 | default: |
| 1212 | if (ch != escape_char) { |
| 1213 | buffer_put_char(bin, escape_char); |
| 1214 | bytes++; |
| 1215 | } |
| 1216 | /* Escaped characters fall through here */ |
| 1217 | break; |
| 1218 | } |
| 1219 | } else { |
| 1220 | /* |
| 1221 | * The previous character was not an escape char. Check if this |
| 1222 | * is an escape. |
| 1223 | */ |
| 1224 | if (last_was_cr && ch == escape_char) { |
| 1225 | /* It is. Set the flag and continue to next character. */ |
| 1226 | escape_pending = 1; |
| 1227 | continue; |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | /* |
| 1232 | * Normal character. Record whether it was a newline, |
| 1233 | * and append it to the buffer. |
| 1234 | */ |
| 1235 | last_was_cr = (ch == '\r' || ch == '\n'); |
| 1236 | buffer_put_char(bin, ch); |
| 1237 | bytes++; |
| 1238 | } |
| 1239 | return bytes; |
| 1240 | } |
| 1241 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1242 | static void |
Damien Miller | 90fdfaf | 2006-03-26 14:25:37 +1100 | [diff] [blame] | 1243 | client_process_input(fd_set *readset) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1244 | { |
Damien Miller | 166fca8 | 2000-04-20 07:42:21 +1000 | [diff] [blame] | 1245 | int len; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1246 | char buf[8192]; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1247 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1248 | /* Read input from stdin. */ |
| 1249 | if (FD_ISSET(fileno(stdin), readset)) { |
| 1250 | /* Read as much as possible. */ |
| 1251 | len = read(fileno(stdin), buf, sizeof(buf)); |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1252 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
| 1253 | return; /* we'll try again later */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1254 | if (len <= 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1255 | /* |
| 1256 | * Received EOF or error. They are treated |
| 1257 | * similarly, except that an error message is printed |
| 1258 | * if it was an error condition. |
| 1259 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1260 | if (len < 0) { |
| 1261 | snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); |
| 1262 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1263 | } |
| 1264 | /* Mark that we have seen EOF. */ |
| 1265 | stdin_eof = 1; |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1266 | /* |
| 1267 | * Send an EOF message to the server unless there is |
| 1268 | * data in the buffer. If there is data in the |
| 1269 | * buffer, no message will be sent now. Code |
| 1270 | * elsewhere will send the EOF when the buffer |
| 1271 | * becomes empty if stdin_eof is set. |
| 1272 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1273 | if (buffer_len(&stdin_buffer) == 0) { |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1274 | packet_start(SSH_CMSG_EOF); |
| 1275 | packet_send(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1276 | } |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1277 | } else if (escape_char == SSH_ESCAPECHAR_NONE) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1278 | /* |
| 1279 | * Normal successful read, and no escape character. |
| 1280 | * Just append the data to buffer. |
| 1281 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1282 | buffer_append(&stdin_buffer, buf, len); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1283 | } else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1284 | /* |
| 1285 | * Normal, successful read. But we have an escape character |
| 1286 | * and have to process the characters one by one. |
| 1287 | */ |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 1288 | if (process_escapes(&stdin_buffer, &stdout_buffer, |
| 1289 | &stderr_buffer, buf, len) == -1) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1290 | return; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1291 | } |
| 1292 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1293 | } |
| 1294 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1295 | static void |
Damien Miller | 90fdfaf | 2006-03-26 14:25:37 +1100 | [diff] [blame] | 1296 | client_process_output(fd_set *writeset) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1297 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1298 | int len; |
| 1299 | char buf[100]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1300 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1301 | /* Write buffered output to stdout. */ |
| 1302 | if (FD_ISSET(fileno(stdout), writeset)) { |
| 1303 | /* Write as much data as possible. */ |
| 1304 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1305 | buffer_len(&stdout_buffer)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1306 | if (len <= 0) { |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1307 | if (errno == EINTR || errno == EAGAIN) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1308 | len = 0; |
| 1309 | else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1310 | /* |
| 1311 | * An error or EOF was encountered. Put an |
| 1312 | * error message to stderr buffer. |
| 1313 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1314 | snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
| 1315 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1316 | quit_pending = 1; |
| 1317 | return; |
| 1318 | } |
| 1319 | } |
| 1320 | /* Consume printed data from the buffer. */ |
| 1321 | buffer_consume(&stdout_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1322 | stdout_bytes += len; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1323 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1324 | /* Write buffered output to stderr. */ |
| 1325 | if (FD_ISSET(fileno(stderr), writeset)) { |
| 1326 | /* Write as much data as possible. */ |
| 1327 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1328 | buffer_len(&stderr_buffer)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1329 | if (len <= 0) { |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1330 | if (errno == EINTR || errno == EAGAIN) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1331 | len = 0; |
| 1332 | else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1333 | /* EOF or error, but can't even print error message. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1334 | quit_pending = 1; |
| 1335 | return; |
| 1336 | } |
| 1337 | } |
| 1338 | /* Consume printed characters from the buffer. */ |
| 1339 | buffer_consume(&stderr_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1340 | stderr_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1341 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1342 | } |
| 1343 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1344 | /* |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1345 | * Get packets from the connection input buffer, and process them as long as |
| 1346 | * there are packets available. |
| 1347 | * |
| 1348 | * Any unknown packets received during the actual |
| 1349 | * session cause the session to terminate. This is |
| 1350 | * intended to make debugging easier since no |
| 1351 | * confirmations are sent. Any compatible protocol |
| 1352 | * extensions must be negotiated during the |
| 1353 | * preparatory phase. |
| 1354 | */ |
| 1355 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1356 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1357 | client_process_buffered_input_packets(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1358 | { |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1359 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1360 | } |
| 1361 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1362 | /* scan buf[] for '~' before sending data to the peer */ |
| 1363 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1364 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1365 | simple_escape_filter(Channel *c, char *buf, int len) |
| 1366 | { |
| 1367 | /* XXX we assume c->extended is writeable */ |
| 1368 | return process_escapes(&c->input, &c->output, &c->extended, buf, len); |
| 1369 | } |
| 1370 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1371 | static void |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1372 | client_channel_closed(int id, void *arg) |
| 1373 | { |
Damien Miller | 3ec2759 | 2001-10-12 11:35:04 +1000 | [diff] [blame] | 1374 | channel_cancel_cleanup(id); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1375 | session_closed = 1; |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 1376 | leave_raw_mode(); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1377 | } |
| 1378 | |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1379 | /* |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1380 | * Implements the interactive session with the server. This is called after |
| 1381 | * the user has been authenticated, and a command has been started on the |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1382 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
| 1383 | * used as an escape character for terminating or suspending the session. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1384 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1385 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 1386 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1387 | client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1388 | { |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1389 | fd_set *readset = NULL, *writeset = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1390 | double start_time, total_time; |
Darren Tucker | c7a6fc4 | 2004-08-13 21:18:00 +1000 | [diff] [blame] | 1391 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
| 1392 | u_int nalloc = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1393 | char buf[100]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1394 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1395 | debug("Entering interactive session."); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1396 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1397 | start_time = get_current_time(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1398 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1399 | /* Initialize variables. */ |
| 1400 | escape_pending = 0; |
| 1401 | last_was_cr = 1; |
| 1402 | exit_status = -1; |
| 1403 | stdin_eof = 0; |
| 1404 | buffer_high = 64 * 1024; |
| 1405 | connection_in = packet_get_connection_in(); |
| 1406 | connection_out = packet_get_connection_out(); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1407 | max_fd = MAX(connection_in, connection_out); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1408 | if (control_fd != -1) |
| 1409 | max_fd = MAX(max_fd, control_fd); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1410 | |
| 1411 | if (!compat20) { |
Ben Lindstrom | 302ea6f | 2001-04-16 02:01:25 +0000 | [diff] [blame] | 1412 | /* enable nonblocking unless tty */ |
| 1413 | if (!isatty(fileno(stdin))) |
| 1414 | set_nonblock(fileno(stdin)); |
| 1415 | if (!isatty(fileno(stdout))) |
| 1416 | set_nonblock(fileno(stdout)); |
| 1417 | if (!isatty(fileno(stderr))) |
| 1418 | set_nonblock(fileno(stderr)); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1419 | max_fd = MAX(max_fd, fileno(stdin)); |
| 1420 | max_fd = MAX(max_fd, fileno(stdout)); |
| 1421 | max_fd = MAX(max_fd, fileno(stderr)); |
| 1422 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1423 | stdin_bytes = 0; |
| 1424 | stdout_bytes = 0; |
| 1425 | stderr_bytes = 0; |
| 1426 | quit_pending = 0; |
| 1427 | escape_char = escape_char_arg; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1428 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1429 | /* Initialize buffers. */ |
| 1430 | buffer_init(&stdin_buffer); |
| 1431 | buffer_init(&stdout_buffer); |
| 1432 | buffer_init(&stderr_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1433 | |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1434 | client_init_dispatch(); |
| 1435 | |
Ben Lindstrom | f49dbff | 2002-12-23 02:01:55 +0000 | [diff] [blame] | 1436 | /* |
| 1437 | * Set signal handlers, (e.g. to restore non-blocking mode) |
| 1438 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) |
| 1439 | */ |
Darren Tucker | 07336da | 2004-11-05 20:02:16 +1100 | [diff] [blame] | 1440 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
| 1441 | signal(SIGHUP, signal_handler); |
Ben Lindstrom | f49dbff | 2002-12-23 02:01:55 +0000 | [diff] [blame] | 1442 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 1443 | signal(SIGINT, signal_handler); |
| 1444 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) |
| 1445 | signal(SIGQUIT, signal_handler); |
| 1446 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
| 1447 | signal(SIGTERM, signal_handler); |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1448 | signal(SIGWINCH, window_change_handler); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1449 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1450 | if (have_pty) |
| 1451 | enter_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1452 | |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1453 | if (compat20) { |
| 1454 | session_ident = ssh2_chan_id; |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1455 | if (escape_char != SSH_ESCAPECHAR_NONE) |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1456 | channel_register_filter(session_ident, |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 1457 | simple_escape_filter, NULL); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1458 | if (session_ident != -1) |
| 1459 | channel_register_cleanup(session_ident, |
Damien Miller | 39eda6e | 2005-11-05 14:52:50 +1100 | [diff] [blame] | 1460 | client_channel_closed, 0); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1461 | } else { |
| 1462 | /* Check if we should immediately send eof on stdin. */ |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1463 | client_check_initial_eof_on_stdin(); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1464 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1465 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1466 | /* Main loop of the client for the interactive session mode. */ |
| 1467 | while (!quit_pending) { |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1468 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1469 | /* Process buffered packets sent by the server. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1470 | client_process_buffered_input_packets(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1471 | |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1472 | if (compat20 && session_closed && !channel_still_open()) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1473 | break; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1474 | |
| 1475 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1476 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1477 | if (rekeying) { |
| 1478 | debug("rekeying in progress"); |
| 1479 | } else { |
| 1480 | /* |
| 1481 | * Make packets of buffered stdin data, and buffer |
| 1482 | * them for sending to the server. |
| 1483 | */ |
| 1484 | if (!compat20) |
| 1485 | client_make_packets_from_stdin_data(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1486 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1487 | /* |
| 1488 | * Make packets from buffered channel data, and |
| 1489 | * enqueue them for sending to the server. |
| 1490 | */ |
| 1491 | if (packet_not_very_much_data_to_write()) |
| 1492 | channel_output_poll(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1493 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1494 | /* |
| 1495 | * Check if the window size has changed, and buffer a |
| 1496 | * message about it to the server if so. |
| 1497 | */ |
| 1498 | client_check_window_change(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1499 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1500 | if (quit_pending) |
| 1501 | break; |
| 1502 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1503 | /* |
| 1504 | * Wait until we have something to do (something becomes |
| 1505 | * available on one of the descriptors). |
| 1506 | */ |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 1507 | max_fd2 = max_fd; |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1508 | client_wait_until_can_do_something(&readset, &writeset, |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 1509 | &max_fd2, &nalloc, rekeying); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1510 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1511 | if (quit_pending) |
| 1512 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1513 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1514 | /* Do channel operations unless rekeying in progress. */ |
| 1515 | if (!rekeying) { |
| 1516 | channel_after_select(readset, writeset); |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 1517 | if (need_rekeying || packet_need_rekeying()) { |
| 1518 | debug("need rekeying"); |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1519 | xxx_kex->done = 0; |
| 1520 | kex_send_kexinit(xxx_kex); |
| 1521 | need_rekeying = 0; |
| 1522 | } |
| 1523 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1524 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1525 | /* Buffer input from the connection. */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1526 | client_process_net_input(readset); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1527 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1528 | /* Accept control connections. */ |
| 1529 | client_process_control(readset); |
| 1530 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1531 | if (quit_pending) |
| 1532 | break; |
| 1533 | |
| 1534 | if (!compat20) { |
| 1535 | /* Buffer data from stdin */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1536 | client_process_input(readset); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1537 | /* |
| 1538 | * Process output to stdout and stderr. Output to |
| 1539 | * the connection is processed elsewhere (above). |
| 1540 | */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1541 | client_process_output(writeset); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1542 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1543 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1544 | /* Send as much buffered packet data as possible to the sender. */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1545 | if (FD_ISSET(connection_out, writeset)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1546 | packet_write_poll(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1547 | } |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1548 | if (readset) |
| 1549 | xfree(readset); |
| 1550 | if (writeset) |
| 1551 | xfree(writeset); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1552 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1553 | /* Terminate the session. */ |
| 1554 | |
| 1555 | /* Stop watching for window change. */ |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1556 | signal(SIGWINCH, SIG_DFL); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1557 | |
Ben Lindstrom | 601e436 | 2001-06-21 03:19:23 +0000 | [diff] [blame] | 1558 | channel_free_all(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1559 | |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 1560 | if (have_pty) |
| 1561 | leave_raw_mode(); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1562 | |
| 1563 | /* restore blocking io */ |
| 1564 | if (!isatty(fileno(stdin))) |
| 1565 | unset_nonblock(fileno(stdin)); |
| 1566 | if (!isatty(fileno(stdout))) |
| 1567 | unset_nonblock(fileno(stdout)); |
| 1568 | if (!isatty(fileno(stderr))) |
| 1569 | unset_nonblock(fileno(stderr)); |
| 1570 | |
Damien Miller | d696551 | 2003-12-17 16:31:53 +1100 | [diff] [blame] | 1571 | /* |
| 1572 | * If there was no shell or command requested, there will be no remote |
| 1573 | * exit status to be returned. In that case, clear error code if the |
| 1574 | * connection was deliberately terminated at this end. |
| 1575 | */ |
| 1576 | if (no_shell_flag && received_signal == SIGTERM) { |
| 1577 | received_signal = 0; |
| 1578 | exit_status = 0; |
| 1579 | } |
| 1580 | |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 1581 | if (received_signal) |
Ben Lindstrom | f8f065b | 2001-12-06 17:52:16 +0000 | [diff] [blame] | 1582 | fatal("Killed by signal %d.", (int) received_signal); |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 1583 | |
| 1584 | /* |
| 1585 | * In interactive mode (with pseudo tty) display a message indicating |
| 1586 | * that the connection has been closed. |
| 1587 | */ |
| 1588 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { |
| 1589 | snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); |
| 1590 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
| 1591 | } |
| 1592 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1593 | /* Output any buffered data for stdout. */ |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1594 | while (buffer_len(&stdout_buffer) > 0) { |
| 1595 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1596 | buffer_len(&stdout_buffer)); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1597 | if (len <= 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1598 | error("Write failed flushing stdout buffer."); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1599 | break; |
| 1600 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1601 | buffer_consume(&stdout_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1602 | stdout_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1603 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1604 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1605 | /* Output any buffered data for stderr. */ |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1606 | while (buffer_len(&stderr_buffer) > 0) { |
| 1607 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1608 | buffer_len(&stderr_buffer)); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1609 | if (len <= 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1610 | error("Write failed flushing stderr buffer."); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1611 | break; |
| 1612 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1613 | buffer_consume(&stderr_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1614 | stderr_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1615 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1616 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1617 | /* Clear and free any buffers. */ |
| 1618 | memset(buf, 0, sizeof(buf)); |
| 1619 | buffer_free(&stdin_buffer); |
| 1620 | buffer_free(&stdout_buffer); |
| 1621 | buffer_free(&stderr_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1622 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1623 | /* Report bytes transferred, and transfer rates. */ |
| 1624 | total_time = get_current_time() - start_time; |
| 1625 | debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 1626 | stdin_bytes, stdout_bytes, stderr_bytes, total_time); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1627 | if (total_time > 0) |
| 1628 | debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 1629 | stdin_bytes / total_time, stdout_bytes / total_time, |
| 1630 | stderr_bytes / total_time); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1631 | |
| 1632 | /* Return the exit status of the program. */ |
| 1633 | debug("Exit status %d", exit_status); |
| 1634 | return exit_status; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1635 | } |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1636 | |
| 1637 | /*********/ |
| 1638 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1639 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1640 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1641 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1642 | u_int data_len; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1643 | char *data = packet_get_string(&data_len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1644 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1645 | buffer_append(&stdout_buffer, data, data_len); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1646 | memset(data, 0, data_len); |
| 1647 | xfree(data); |
| 1648 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1649 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1650 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1651 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1652 | u_int data_len; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1653 | char *data = packet_get_string(&data_len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1654 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1655 | buffer_append(&stderr_buffer, data, data_len); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1656 | memset(data, 0, data_len); |
| 1657 | xfree(data); |
| 1658 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1659 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1660 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1661 | { |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1662 | exit_status = packet_get_int(); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1663 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1664 | /* Acknowledge the exit. */ |
| 1665 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); |
| 1666 | packet_send(); |
| 1667 | /* |
| 1668 | * Must wait for packet to be sent since we are |
| 1669 | * exiting the loop. |
| 1670 | */ |
| 1671 | packet_write_wait(); |
| 1672 | /* Flag that we want to exit. */ |
| 1673 | quit_pending = 1; |
| 1674 | } |
Darren Tucker | 5dcdd21 | 2003-10-02 16:17:00 +1000 | [diff] [blame] | 1675 | static void |
| 1676 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) |
| 1677 | { |
| 1678 | Channel *c = NULL; |
| 1679 | int remote_id, sock; |
| 1680 | |
| 1681 | /* Read the remote channel number from the message. */ |
| 1682 | remote_id = packet_get_int(); |
| 1683 | packet_check_eom(); |
| 1684 | |
| 1685 | /* |
| 1686 | * Get a connection to the local authentication agent (this may again |
| 1687 | * get forwarded). |
| 1688 | */ |
| 1689 | sock = ssh_get_authentication_socket(); |
| 1690 | |
| 1691 | /* |
| 1692 | * If we could not connect the agent, send an error message back to |
| 1693 | * the server. This should never happen unless the agent dies, |
| 1694 | * because authentication forwarding is only enabled if we have an |
| 1695 | * agent. |
| 1696 | */ |
| 1697 | if (sock >= 0) { |
| 1698 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, |
| 1699 | -1, 0, 0, 0, "authentication agent connection", 1); |
| 1700 | c->remote_id = remote_id; |
| 1701 | c->force_drain = 1; |
| 1702 | } |
| 1703 | if (c == NULL) { |
| 1704 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); |
| 1705 | packet_put_int(remote_id); |
| 1706 | } else { |
| 1707 | /* Send a confirmation to the remote host. */ |
| 1708 | debug("Forwarding authentication connection."); |
| 1709 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); |
| 1710 | packet_put_int(remote_id); |
| 1711 | packet_put_int(c->self); |
| 1712 | } |
| 1713 | packet_send(); |
| 1714 | } |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1715 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1716 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1717 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
| 1718 | { |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1719 | Channel *c = NULL; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1720 | char *listen_address, *originator_address; |
| 1721 | int listen_port, originator_port; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1722 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1723 | |
| 1724 | /* Get rest of the packet */ |
| 1725 | listen_address = packet_get_string(NULL); |
| 1726 | listen_port = packet_get_int(); |
| 1727 | originator_address = packet_get_string(NULL); |
| 1728 | originator_port = packet_get_int(); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1729 | packet_check_eom(); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1730 | |
| 1731 | debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d", |
| 1732 | listen_address, listen_port, originator_address, originator_port); |
| 1733 | |
Ben Lindstrom | 173e646 | 2001-07-04 05:15:15 +0000 | [diff] [blame] | 1734 | sock = channel_connect_by_listen_address(listen_port); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1735 | if (sock < 0) { |
| 1736 | xfree(originator_address); |
| 1737 | xfree(listen_address); |
| 1738 | return NULL; |
| 1739 | } |
| 1740 | c = channel_new("forwarded-tcpip", |
| 1741 | SSH_CHANNEL_CONNECTING, sock, sock, -1, |
Darren Tucker | 5baa170 | 2007-12-29 09:37:10 +1100 | [diff] [blame] | 1742 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1743 | originator_address, 1); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1744 | xfree(originator_address); |
| 1745 | xfree(listen_address); |
| 1746 | return c; |
| 1747 | } |
| 1748 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1749 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1750 | client_request_x11(const char *request_type, int rchan) |
| 1751 | { |
| 1752 | Channel *c = NULL; |
| 1753 | char *originator; |
| 1754 | int originator_port; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1755 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1756 | |
| 1757 | if (!options.forward_x11) { |
| 1758 | error("Warning: ssh server tried X11 forwarding."); |
Damien Miller | 5eb137c | 2005-12-31 16:19:53 +1100 | [diff] [blame] | 1759 | error("Warning: this is probably a break-in attempt by a malicious server."); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1760 | return NULL; |
| 1761 | } |
| 1762 | originator = packet_get_string(NULL); |
| 1763 | if (datafellows & SSH_BUG_X11FWD) { |
| 1764 | debug2("buggy server: x11 request w/o originator_port"); |
| 1765 | originator_port = 0; |
| 1766 | } else { |
| 1767 | originator_port = packet_get_int(); |
| 1768 | } |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1769 | packet_check_eom(); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1770 | /* XXX check permission */ |
Damien Miller | d83ff35 | 2001-01-30 09:19:34 +1100 | [diff] [blame] | 1771 | debug("client_request_x11: request from %s %d", originator, |
| 1772 | originator_port); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1773 | xfree(originator); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1774 | sock = x11_connect_display(); |
| 1775 | if (sock < 0) |
| 1776 | return NULL; |
| 1777 | c = channel_new("x11", |
| 1778 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1779 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
Ben Lindstrom | 944c4f0 | 2001-09-18 05:51:13 +0000 | [diff] [blame] | 1780 | c->force_drain = 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1781 | return c; |
| 1782 | } |
| 1783 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1784 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1785 | client_request_agent(const char *request_type, int rchan) |
| 1786 | { |
| 1787 | Channel *c = NULL; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1788 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1789 | |
| 1790 | if (!options.forward_agent) { |
| 1791 | error("Warning: ssh server tried agent forwarding."); |
Damien Miller | 5eb137c | 2005-12-31 16:19:53 +1100 | [diff] [blame] | 1792 | error("Warning: this is probably a break-in attempt by a malicious server."); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1793 | return NULL; |
| 1794 | } |
Darren Tucker | 82a3d2b | 2007-02-19 22:10:25 +1100 | [diff] [blame] | 1795 | sock = ssh_get_authentication_socket(); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1796 | if (sock < 0) |
| 1797 | return NULL; |
| 1798 | c = channel_new("authentication agent connection", |
| 1799 | SSH_CHANNEL_OPEN, sock, sock, -1, |
Darren Tucker | 5baa170 | 2007-12-29 09:37:10 +1100 | [diff] [blame] | 1800 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1801 | "authentication agent connection", 1); |
Ben Lindstrom | 944c4f0 | 2001-09-18 05:51:13 +0000 | [diff] [blame] | 1802 | c->force_drain = 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1803 | return c; |
| 1804 | } |
| 1805 | |
Damien Miller | b3ce9fe | 2007-08-08 14:32:41 +1000 | [diff] [blame] | 1806 | int |
| 1807 | client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun) |
| 1808 | { |
| 1809 | Channel *c; |
| 1810 | int fd; |
| 1811 | |
| 1812 | if (tun_mode == SSH_TUNMODE_NO) |
| 1813 | return 0; |
| 1814 | |
| 1815 | if (!compat20) { |
| 1816 | error("Tunnel forwarding is not support for protocol 1"); |
| 1817 | return -1; |
| 1818 | } |
| 1819 | |
| 1820 | debug("Requesting tun unit %d in mode %d", local_tun, tun_mode); |
| 1821 | |
| 1822 | /* Open local tunnel device */ |
| 1823 | if ((fd = tun_open(local_tun, tun_mode)) == -1) { |
| 1824 | error("Tunnel device open failed."); |
| 1825 | return -1; |
| 1826 | } |
| 1827 | |
| 1828 | c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, |
| 1829 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); |
| 1830 | c->datagram = 1; |
| 1831 | |
| 1832 | #if defined(SSH_TUN_FILTER) |
| 1833 | if (options.tun_open == SSH_TUNMODE_POINTOPOINT) |
| 1834 | channel_register_filter(c->self, sys_tun_infilter, |
| 1835 | sys_tun_outfilter); |
| 1836 | #endif |
| 1837 | |
| 1838 | packet_start(SSH2_MSG_CHANNEL_OPEN); |
| 1839 | packet_put_cstring("tun@openssh.com"); |
| 1840 | packet_put_int(c->self); |
| 1841 | packet_put_int(c->local_window_max); |
| 1842 | packet_put_int(c->local_maxpacket); |
| 1843 | packet_put_int(tun_mode); |
| 1844 | packet_put_int(remote_tun); |
| 1845 | packet_send(); |
| 1846 | |
| 1847 | return 0; |
| 1848 | } |
| 1849 | |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1850 | /* XXXX move to generic input handler */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1851 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1852 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1853 | { |
| 1854 | Channel *c = NULL; |
| 1855 | char *ctype; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1856 | int rchan; |
Ben Lindstrom | 4fed2be | 2002-06-25 23:17:36 +0000 | [diff] [blame] | 1857 | u_int rmaxpack, rwindow, len; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1858 | |
| 1859 | ctype = packet_get_string(&len); |
| 1860 | rchan = packet_get_int(); |
| 1861 | rwindow = packet_get_int(); |
| 1862 | rmaxpack = packet_get_int(); |
| 1863 | |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 1864 | debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1865 | ctype, rchan, rwindow, rmaxpack); |
| 1866 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1867 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
| 1868 | c = client_request_forwarded_tcpip(ctype, rchan); |
| 1869 | } else if (strcmp(ctype, "x11") == 0) { |
| 1870 | c = client_request_x11(ctype, rchan); |
| 1871 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { |
| 1872 | c = client_request_agent(ctype, rchan); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1873 | } |
| 1874 | /* XXX duplicate : */ |
| 1875 | if (c != NULL) { |
| 1876 | debug("confirm %s", ctype); |
| 1877 | c->remote_id = rchan; |
| 1878 | c->remote_window = rwindow; |
| 1879 | c->remote_maxpacket = rmaxpack; |
Ben Lindstrom | a69d89b | 2001-05-09 00:01:18 +0000 | [diff] [blame] | 1880 | if (c->type != SSH_CHANNEL_CONNECTING) { |
| 1881 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); |
| 1882 | packet_put_int(c->remote_id); |
| 1883 | packet_put_int(c->self); |
| 1884 | packet_put_int(c->local_window); |
| 1885 | packet_put_int(c->local_maxpacket); |
| 1886 | packet_send(); |
| 1887 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1888 | } else { |
| 1889 | debug("failure %s", ctype); |
| 1890 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
| 1891 | packet_put_int(rchan); |
| 1892 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); |
Ben Lindstrom | f343674 | 2001-04-29 19:52:00 +0000 | [diff] [blame] | 1893 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
Ben Lindstrom | a69d89b | 2001-05-09 00:01:18 +0000 | [diff] [blame] | 1894 | packet_put_cstring("open failed"); |
Ben Lindstrom | f343674 | 2001-04-29 19:52:00 +0000 | [diff] [blame] | 1895 | packet_put_cstring(""); |
| 1896 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1897 | packet_send(); |
| 1898 | } |
| 1899 | xfree(ctype); |
| 1900 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1901 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1902 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1903 | { |
| 1904 | Channel *c = NULL; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1905 | int exitval, id, reply, success = 0; |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1906 | char *rtype; |
| 1907 | |
| 1908 | id = packet_get_int(); |
| 1909 | rtype = packet_get_string(NULL); |
| 1910 | reply = packet_get_char(); |
| 1911 | |
| 1912 | debug("client_input_channel_req: channel %d rtype %s reply %d", |
| 1913 | id, rtype, reply); |
| 1914 | |
Damien Miller | 3bbd878 | 2004-06-18 22:23:22 +1000 | [diff] [blame] | 1915 | if (id == -1) { |
| 1916 | error("client_input_channel_req: request for channel -1"); |
| 1917 | } else if ((c = channel_lookup(id)) == NULL) { |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1918 | error("client_input_channel_req: channel %d: unknown channel", id); |
| 1919 | } else if (strcmp(rtype, "exit-status") == 0) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1920 | exitval = packet_get_int(); |
| 1921 | if (id == session_ident) { |
| 1922 | success = 1; |
| 1923 | exit_status = exitval; |
| 1924 | } else if (c->ctl_fd == -1) { |
| 1925 | error("client_input_channel_req: unexpected channel %d", |
| 1926 | session_ident); |
| 1927 | } else { |
| 1928 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); |
| 1929 | success = 1; |
| 1930 | } |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1931 | packet_check_eom(); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1932 | } |
| 1933 | if (reply) { |
| 1934 | packet_start(success ? |
| 1935 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); |
Damien Miller | 3bbd878 | 2004-06-18 22:23:22 +1000 | [diff] [blame] | 1936 | packet_put_int(id); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1937 | packet_send(); |
| 1938 | } |
| 1939 | xfree(rtype); |
| 1940 | } |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 1941 | static void |
| 1942 | client_input_global_request(int type, u_int32_t seq, void *ctxt) |
| 1943 | { |
| 1944 | char *rtype; |
| 1945 | int want_reply; |
| 1946 | int success = 0; |
| 1947 | |
| 1948 | rtype = packet_get_string(NULL); |
| 1949 | want_reply = packet_get_char(); |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 1950 | debug("client_input_global_request: rtype %s want_reply %d", |
| 1951 | rtype, want_reply); |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 1952 | if (want_reply) { |
| 1953 | packet_start(success ? |
| 1954 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); |
| 1955 | packet_send(); |
| 1956 | packet_write_wait(); |
| 1957 | } |
| 1958 | xfree(rtype); |
| 1959 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1960 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1961 | void |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 1962 | client_session2_setup(int id, int want_tty, int want_subsystem, |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1963 | const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env, |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1964 | dispatch_fn *subsys_repl) |
| 1965 | { |
| 1966 | int len; |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1967 | Channel *c = NULL; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1968 | |
| 1969 | debug2("%s: id %d", __func__, id); |
| 1970 | |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1971 | if ((c = channel_lookup(id)) == NULL) |
| 1972 | fatal("client_session2_setup: channel %d: unknown channel", id); |
| 1973 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1974 | if (want_tty) { |
| 1975 | struct winsize ws; |
| 1976 | struct termios tio; |
| 1977 | |
| 1978 | /* Store window size in the packet. */ |
| 1979 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) |
| 1980 | memset(&ws, 0, sizeof(ws)); |
| 1981 | |
| 1982 | channel_request_start(id, "pty-req", 0); |
| 1983 | packet_put_cstring(term != NULL ? term : ""); |
Damien Miller | 71a7367 | 2006-03-26 14:04:36 +1100 | [diff] [blame] | 1984 | packet_put_int((u_int)ws.ws_col); |
| 1985 | packet_put_int((u_int)ws.ws_row); |
| 1986 | packet_put_int((u_int)ws.ws_xpixel); |
| 1987 | packet_put_int((u_int)ws.ws_ypixel); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1988 | tio = get_saved_tio(); |
| 1989 | tty_make_modes(-1, tiop != NULL ? tiop : &tio); |
| 1990 | packet_send(); |
| 1991 | /* XXX wait for reply */ |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1992 | c->client_tty = 1; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1993 | } |
| 1994 | |
| 1995 | /* Transfer any environment variables from client to server */ |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1996 | if (options.num_send_env != 0 && env != NULL) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1997 | int i, j, matched; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1998 | char *name, *val; |
| 1999 | |
| 2000 | debug("Sending environment."); |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 2001 | for (i = 0; env[i] != NULL; i++) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2002 | /* Split */ |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 2003 | name = xstrdup(env[i]); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2004 | if ((val = strchr(name, '=')) == NULL) { |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 2005 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2006 | continue; |
| 2007 | } |
| 2008 | *val++ = '\0'; |
| 2009 | |
| 2010 | matched = 0; |
| 2011 | for (j = 0; j < options.num_send_env; j++) { |
| 2012 | if (match_pattern(name, options.send_env[j])) { |
| 2013 | matched = 1; |
| 2014 | break; |
| 2015 | } |
| 2016 | } |
| 2017 | if (!matched) { |
| 2018 | debug3("Ignored env %s", name); |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 2019 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2020 | continue; |
| 2021 | } |
| 2022 | |
| 2023 | debug("Sending env %s = %s", name, val); |
| 2024 | channel_request_start(id, "env", 0); |
| 2025 | packet_put_cstring(name); |
| 2026 | packet_put_cstring(val); |
| 2027 | packet_send(); |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 2028 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2029 | } |
| 2030 | } |
| 2031 | |
| 2032 | len = buffer_len(cmd); |
| 2033 | if (len > 0) { |
| 2034 | if (len > 900) |
| 2035 | len = 900; |
| 2036 | if (want_subsystem) { |
| 2037 | debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd)); |
| 2038 | channel_request_start(id, "subsystem", subsys_repl != NULL); |
| 2039 | if (subsys_repl != NULL) { |
| 2040 | /* register callback for reply */ |
| 2041 | /* XXX we assume that client_loop has already been called */ |
| 2042 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl); |
| 2043 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl); |
| 2044 | } |
| 2045 | } else { |
| 2046 | debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd)); |
| 2047 | channel_request_start(id, "exec", 0); |
| 2048 | } |
| 2049 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); |
| 2050 | packet_send(); |
| 2051 | } else { |
| 2052 | channel_request_start(id, "shell", 0); |
| 2053 | packet_send(); |
| 2054 | } |
| 2055 | } |
| 2056 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 2057 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 2058 | client_init_dispatch_20(void) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2059 | { |
Ben Lindstrom | 8ac9106 | 2001-04-04 17:57:54 +0000 | [diff] [blame] | 2060 | dispatch_init(&dispatch_protocol_error); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 2061 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2062 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
| 2063 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); |
| 2064 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); |
| 2065 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 2066 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2067 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
| 2068 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 2069 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2070 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 2071 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
Ben Lindstrom | 8ac9106 | 2001-04-04 17:57:54 +0000 | [diff] [blame] | 2072 | |
| 2073 | /* rekeying */ |
| 2074 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 2075 | |
| 2076 | /* global request reply messages */ |
| 2077 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); |
| 2078 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2079 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 2080 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 2081 | client_init_dispatch_13(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2082 | { |
| 2083 | dispatch_init(NULL); |
| 2084 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); |
| 2085 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); |
| 2086 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2087 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
| 2088 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
| 2089 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2090 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
| 2091 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); |
| 2092 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 2093 | |
| 2094 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? |
Darren Tucker | 5dcdd21 | 2003-10-02 16:17:00 +1000 | [diff] [blame] | 2095 | &client_input_agent_open : &deny_input_open); |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 2096 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
| 2097 | &x11_input_open : &deny_input_open); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2098 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 2099 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 2100 | client_init_dispatch_15(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2101 | { |
| 2102 | client_init_dispatch_13(); |
| 2103 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); |
| 2104 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); |
| 2105 | } |
Ben Lindstrom | db47f38 | 2001-07-04 05:10:27 +0000 | [diff] [blame] | 2106 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 2107 | client_init_dispatch(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2108 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2109 | if (compat20) |
| 2110 | client_init_dispatch_20(); |
| 2111 | else if (compat13) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2112 | client_init_dispatch_13(); |
| 2113 | else |
| 2114 | client_init_dispatch_15(); |
| 2115 | } |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2116 | |
| 2117 | /* client specific fatal cleanup */ |
| 2118 | void |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 2119 | cleanup_exit(int i) |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2120 | { |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2121 | leave_raw_mode(); |
| 2122 | leave_non_blocking(); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2123 | if (options.control_path != NULL && control_fd != -1) |
| 2124 | unlink(options.control_path); |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 2125 | _exit(i); |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2126 | } |