Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * The main loop for the interactive session (client side). |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 6 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 7 | * As far as I am concerned, the code I have written for this software |
| 8 | * can be used freely for any purpose. Any derived versions of this |
| 9 | * software must be clearly marked as such, and if the derived work is |
| 10 | * incompatible with the protocol description in the RFC file, it must be |
| 11 | * called by a name other than "ssh" or "Secure Shell". |
| 12 | * |
| 13 | * |
| 14 | * Copyright (c) 1999 Theo de Raadt. All rights reserved. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions |
| 18 | * are met: |
| 19 | * 1. Redistributions of source code must retain the above copyright |
| 20 | * notice, this list of conditions and the following disclaimer. |
| 21 | * 2. Redistributions in binary form must reproduce the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer in the |
| 23 | * documentation and/or other materials provided with the distribution. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 35 | * |
| 36 | * |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 37 | * SSH2 support added by Markus Friedl. |
Ben Lindstrom | 4469723 | 2001-07-04 03:32:30 +0000 | [diff] [blame] | 38 | * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 39 | * |
| 40 | * Redistribution and use in source and binary forms, with or without |
| 41 | * modification, are permitted provided that the following conditions |
| 42 | * are met: |
| 43 | * 1. Redistributions of source code must retain the above copyright |
| 44 | * notice, this list of conditions and the following disclaimer. |
| 45 | * 2. Redistributions in binary form must reproduce the above copyright |
| 46 | * notice, this list of conditions and the following disclaimer in the |
| 47 | * documentation and/or other materials provided with the distribution. |
| 48 | * |
| 49 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 50 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 51 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 52 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 53 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 54 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 55 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 56 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 57 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 58 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 59 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 60 | |
| 61 | #include "includes.h" |
Damien Miller | f17883e | 2006-03-15 11:45:54 +1100 | [diff] [blame^] | 62 | RCSID("$OpenBSD: clientloop.c,v 1.154 2006/02/20 17:19:54 stevesk Exp $"); |
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> |
| 65 | #ifdef HAVE_SYS_STAT_H |
| 66 | # include <sys/stat.h> |
| 67 | #endif |
Damien Miller | 17e91c0 | 2006-03-15 11:28:34 +1100 | [diff] [blame] | 68 | #include <sys/ioctl.h> |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 69 | |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 70 | #include <paths.h> |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 71 | #include <termios.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 72 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 73 | #include "ssh.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 74 | #include "ssh1.h" |
| 75 | #include "ssh2.h" |
| 76 | #include "xmalloc.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 77 | #include "packet.h" |
| 78 | #include "buffer.h" |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 79 | #include "compat.h" |
Ben Lindstrom | c763767 | 2001-06-09 00:36:26 +0000 | [diff] [blame] | 80 | #include "channels.h" |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 81 | #include "dispatch.h" |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 82 | #include "buffer.h" |
| 83 | #include "bufaux.h" |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 84 | #include "key.h" |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 85 | #include "kex.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 86 | #include "log.h" |
| 87 | #include "readconf.h" |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 88 | #include "clientloop.h" |
Damien Miller | aeb31d6 | 2005-12-13 19:29:36 +1100 | [diff] [blame] | 89 | #include "sshconnect.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 90 | #include "authfd.h" |
| 91 | #include "atomicio.h" |
Darren Tucker | 06f2bd8 | 2004-05-13 16:06:46 +1000 | [diff] [blame] | 92 | #include "sshpty.h" |
Ben Lindstrom | 302ea6f | 2001-04-16 02:01:25 +0000 | [diff] [blame] | 93 | #include "misc.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 94 | #include "monitor_fdpass.h" |
| 95 | #include "match.h" |
| 96 | #include "msg.h" |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 97 | |
| 98 | /* import options */ |
| 99 | extern Options options; |
| 100 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 101 | /* Flag indicating that stdin should be redirected from /dev/null. */ |
| 102 | extern int stdin_null_flag; |
| 103 | |
Damien Miller | d696551 | 2003-12-17 16:31:53 +1100 | [diff] [blame] | 104 | /* Flag indicating that no shell has been requested */ |
| 105 | extern int no_shell_flag; |
| 106 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 107 | /* Control socket */ |
| 108 | extern int control_fd; |
| 109 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 110 | /* |
| 111 | * Name of the host we are connecting to. This is the name given on the |
| 112 | * command line, or the HostName specified for the user-supplied name in a |
| 113 | * configuration file. |
| 114 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 115 | extern char *host; |
| 116 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 117 | /* |
| 118 | * Flag to indicate that we have received a window change signal which has |
| 119 | * not yet been processed. This will cause a message indicating the new |
| 120 | * window size to be sent to the server a little later. This is volatile |
| 121 | * because this is updated in a signal handler. |
| 122 | */ |
Ben Lindstrom | 5e71c54 | 2001-12-06 16:48:14 +0000 | [diff] [blame] | 123 | static volatile sig_atomic_t received_window_change_signal = 0; |
| 124 | static volatile sig_atomic_t received_signal = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 125 | |
Damien Miller | 788f212 | 2005-11-05 15:14:59 +1100 | [diff] [blame] | 126 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 127 | static int in_non_blocking_mode = 0; |
| 128 | |
| 129 | /* Common data for the client loop code. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 130 | static int quit_pending; /* Set to non-zero to quit the client loop. */ |
| 131 | static int escape_char; /* Escape character. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 132 | static int escape_pending; /* Last character was the escape character */ |
| 133 | static int last_was_cr; /* Last character was a newline. */ |
| 134 | static int exit_status; /* Used to store the exit status of the command. */ |
| 135 | static int stdin_eof; /* EOF has been encountered on standard error. */ |
| 136 | static Buffer stdin_buffer; /* Buffer for stdin data. */ |
| 137 | static Buffer stdout_buffer; /* Buffer for stdout data. */ |
| 138 | static Buffer stderr_buffer; /* Buffer for stderr data. */ |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 139 | static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
| 140 | static u_int buffer_high;/* Soft max buffer size. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 141 | static int connection_in; /* Connection to server (input). */ |
| 142 | static int connection_out; /* Connection to server (output). */ |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 143 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 144 | static int session_closed = 0; /* In SSH2: login session closed. */ |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 145 | static int server_alive_timeouts = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 146 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 147 | static void client_init_dispatch(void); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 148 | int session_ident = -1; |
| 149 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 150 | struct confirm_ctx { |
| 151 | int want_tty; |
| 152 | int want_subsys; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 153 | int want_x_fwd; |
| 154 | int want_agent_fwd; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 155 | Buffer cmd; |
| 156 | char *term; |
| 157 | struct termios tio; |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 158 | char **env; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 159 | }; |
| 160 | |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 161 | /*XXX*/ |
| 162 | extern Kex *xxx_kex; |
| 163 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 164 | void ssh_process_session2_setup(int, int, int, Buffer *); |
| 165 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 166 | /* Restores stdin to blocking mode. */ |
| 167 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 168 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 169 | leave_non_blocking(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 170 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 171 | if (in_non_blocking_mode) { |
Damien Miller | 03e66f6 | 2004-06-15 15:47:51 +1000 | [diff] [blame] | 172 | unset_nonblock(fileno(stdin)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 173 | in_non_blocking_mode = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 174 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 175 | } |
| 176 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 177 | /* Puts stdin terminal in non-blocking mode. */ |
| 178 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 179 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 180 | enter_non_blocking(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 181 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 182 | in_non_blocking_mode = 1; |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 183 | set_nonblock(fileno(stdin)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 184 | } |
| 185 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 186 | /* |
| 187 | * Signal handler for the window change signal (SIGWINCH). This just sets a |
| 188 | * flag indicating that the window has changed. |
| 189 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 190 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 191 | static void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 192 | window_change_handler(int sig) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 193 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 194 | received_window_change_signal = 1; |
| 195 | signal(SIGWINCH, window_change_handler); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 196 | } |
| 197 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 198 | /* |
| 199 | * Signal handler for signals that cause the program to terminate. These |
| 200 | * signals must be trapped to restore terminal modes. |
| 201 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 202 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 203 | static void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 204 | signal_handler(int sig) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 205 | { |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 206 | received_signal = sig; |
| 207 | quit_pending = 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 208 | } |
| 209 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 210 | /* |
| 211 | * Returns current time in seconds from Jan 1, 1970 with the maximum |
| 212 | * available resolution. |
| 213 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 214 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 215 | static double |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 216 | get_current_time(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 217 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 218 | struct timeval tv; |
| 219 | gettimeofday(&tv, NULL); |
| 220 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 221 | } |
| 222 | |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 223 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
| 224 | void |
| 225 | client_x11_get_proto(const char *display, const char *xauth_path, |
| 226 | u_int trusted, char **_proto, char **_data) |
| 227 | { |
| 228 | char cmd[1024]; |
| 229 | char line[512]; |
| 230 | char xdisplay[512]; |
| 231 | static char proto[512], data[512]; |
| 232 | FILE *f; |
| 233 | int got_data = 0, generated = 0, do_unlink = 0, i; |
| 234 | char *xauthdir, *xauthfile; |
| 235 | struct stat st; |
| 236 | |
| 237 | xauthdir = xauthfile = NULL; |
| 238 | *_proto = proto; |
| 239 | *_data = data; |
| 240 | proto[0] = data[0] = '\0'; |
| 241 | |
| 242 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { |
| 243 | debug("No xauth program."); |
| 244 | } else { |
| 245 | if (display == NULL) { |
| 246 | debug("x11_get_proto: DISPLAY not set"); |
| 247 | return; |
| 248 | } |
| 249 | /* |
| 250 | * Handle FamilyLocal case where $DISPLAY does |
| 251 | * not match an authorization entry. For this we |
| 252 | * just try "xauth list unix:displaynum.screennum". |
| 253 | * XXX: "localhost" match to determine FamilyLocal |
| 254 | * is not perfect. |
| 255 | */ |
| 256 | if (strncmp(display, "localhost:", 10) == 0) { |
| 257 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", |
| 258 | display + 10); |
| 259 | display = xdisplay; |
| 260 | } |
| 261 | if (trusted == 0) { |
| 262 | xauthdir = xmalloc(MAXPATHLEN); |
| 263 | xauthfile = xmalloc(MAXPATHLEN); |
| 264 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); |
| 265 | if (mkdtemp(xauthdir) != NULL) { |
| 266 | do_unlink = 1; |
| 267 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", |
| 268 | xauthdir); |
| 269 | snprintf(cmd, sizeof(cmd), |
| 270 | "%s -f %s generate %s " SSH_X11_PROTO |
| 271 | " untrusted timeout 1200 2>" _PATH_DEVNULL, |
| 272 | xauth_path, xauthfile, display); |
| 273 | debug2("x11_get_proto: %s", cmd); |
| 274 | if (system(cmd) == 0) |
| 275 | generated = 1; |
| 276 | } |
| 277 | } |
| 278 | snprintf(cmd, sizeof(cmd), |
Darren Tucker | d89dbf2 | 2005-10-03 18:05:26 +1000 | [diff] [blame] | 279 | "%s %s%s list %s 2>" _PATH_DEVNULL, |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 280 | xauth_path, |
| 281 | generated ? "-f " : "" , |
| 282 | generated ? xauthfile : "", |
| 283 | display); |
| 284 | debug2("x11_get_proto: %s", cmd); |
| 285 | f = popen(cmd, "r"); |
| 286 | if (f && fgets(line, sizeof(line), f) && |
| 287 | sscanf(line, "%*s %511s %511s", proto, data) == 2) |
| 288 | got_data = 1; |
| 289 | if (f) |
| 290 | pclose(f); |
| 291 | } |
| 292 | |
| 293 | if (do_unlink) { |
| 294 | unlink(xauthfile); |
| 295 | rmdir(xauthdir); |
| 296 | } |
| 297 | if (xauthdir) |
| 298 | xfree(xauthdir); |
| 299 | if (xauthfile) |
| 300 | xfree(xauthfile); |
| 301 | |
| 302 | /* |
| 303 | * If we didn't get authentication data, just make up some |
| 304 | * data. The forwarding code will check the validity of the |
| 305 | * response anyway, and substitute this data. The X11 |
| 306 | * server, however, will ignore this fake data and use |
| 307 | * whatever authentication mechanisms it was using otherwise |
| 308 | * for the local connection. |
| 309 | */ |
| 310 | if (!got_data) { |
| 311 | u_int32_t rnd = 0; |
| 312 | |
| 313 | logit("Warning: No xauth data; " |
| 314 | "using fake authentication data for X11 forwarding."); |
| 315 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); |
| 316 | for (i = 0; i < 16; i++) { |
| 317 | if (i % 4 == 0) |
| 318 | rnd = arc4random(); |
| 319 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", |
| 320 | rnd & 0xff); |
| 321 | rnd >>= 8; |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 326 | /* |
| 327 | * This is called when the interactive is entered. This checks if there is |
| 328 | * an EOF coming on stdin. We must check this explicitly, as select() does |
| 329 | * not appear to wake up when redirecting from /dev/null. |
| 330 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 331 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 332 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 333 | client_check_initial_eof_on_stdin(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 334 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 335 | int len; |
| 336 | char buf[1]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 337 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 338 | /* |
| 339 | * If standard input is to be "redirected from /dev/null", we simply |
| 340 | * mark that we have seen an EOF and send an EOF message to the |
| 341 | * server. Otherwise, we try to read a single character; it appears |
| 342 | * that for some files, such /dev/null, select() never wakes up for |
| 343 | * read for this descriptor, which means that we never get EOF. This |
| 344 | * way we will get the EOF if stdin comes from /dev/null or similar. |
| 345 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 346 | if (stdin_null_flag) { |
| 347 | /* Fake EOF on stdin. */ |
| 348 | debug("Sending eof."); |
| 349 | stdin_eof = 1; |
| 350 | packet_start(SSH_CMSG_EOF); |
| 351 | packet_send(); |
| 352 | } else { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 353 | enter_non_blocking(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 354 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 355 | /* Check for immediate EOF on stdin. */ |
| 356 | len = read(fileno(stdin), buf, 1); |
| 357 | if (len == 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 358 | /* EOF. Record that we have seen it and send EOF to server. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 359 | debug("Sending eof."); |
| 360 | stdin_eof = 1; |
| 361 | packet_start(SSH_CMSG_EOF); |
| 362 | packet_send(); |
| 363 | } else if (len > 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 364 | /* |
| 365 | * Got data. We must store the data in the buffer, |
| 366 | * and also process it as an escape character if |
| 367 | * appropriate. |
| 368 | */ |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 369 | if ((u_char) buf[0] == escape_char) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 370 | escape_pending = 1; |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 371 | else |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 372 | buffer_append(&stdin_buffer, buf, 1); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 373 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 374 | leave_non_blocking(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 375 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 376 | } |
| 377 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 378 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 379 | /* |
| 380 | * Make packets from buffered stdin data, and buffer them for sending to the |
| 381 | * connection. |
| 382 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 383 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 384 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 385 | client_make_packets_from_stdin_data(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 386 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 387 | u_int len; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 388 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 389 | /* Send buffered stdin data to the server. */ |
| 390 | while (buffer_len(&stdin_buffer) > 0 && |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 391 | packet_not_very_much_data_to_write()) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 392 | len = buffer_len(&stdin_buffer); |
| 393 | /* Keep the packets at reasonable size. */ |
| 394 | if (len > packet_get_maxsize()) |
| 395 | len = packet_get_maxsize(); |
| 396 | packet_start(SSH_CMSG_STDIN_DATA); |
| 397 | packet_put_string(buffer_ptr(&stdin_buffer), len); |
| 398 | packet_send(); |
| 399 | buffer_consume(&stdin_buffer, len); |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 400 | stdin_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 401 | /* If we have a pending EOF, send it now. */ |
| 402 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { |
| 403 | packet_start(SSH_CMSG_EOF); |
| 404 | packet_send(); |
| 405 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 406 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 407 | } |
| 408 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 409 | /* |
| 410 | * Checks if the client window has changed, and sends a packet about it to |
| 411 | * the server if so. The actual change is detected elsewhere (by a software |
| 412 | * interrupt on Unix); this just checks the flag and sends a message if |
| 413 | * appropriate. |
| 414 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 415 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 416 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 417 | client_check_window_change(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 418 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 419 | struct winsize ws; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 420 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 421 | if (! received_window_change_signal) |
| 422 | return; |
| 423 | /** XXX race */ |
| 424 | received_window_change_signal = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 425 | |
Damien Miller | d344494 | 2000-09-30 14:20:03 +1100 | [diff] [blame] | 426 | debug2("client_check_window_change: changed"); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 427 | |
| 428 | if (compat20) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 429 | channel_send_window_changes(); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 430 | } else { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 431 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
| 432 | return; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 433 | packet_start(SSH_CMSG_WINDOW_SIZE); |
| 434 | packet_put_int(ws.ws_row); |
| 435 | packet_put_int(ws.ws_col); |
| 436 | packet_put_int(ws.ws_xpixel); |
| 437 | packet_put_int(ws.ws_ypixel); |
| 438 | packet_send(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 439 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 440 | } |
| 441 | |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 442 | static void |
| 443 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) |
| 444 | { |
| 445 | server_alive_timeouts = 0; |
| 446 | client_global_request_reply_fwd(type, seq, ctxt); |
| 447 | } |
| 448 | |
| 449 | static void |
| 450 | server_alive_check(void) |
| 451 | { |
| 452 | if (++server_alive_timeouts > options.server_alive_count_max) |
| 453 | packet_disconnect("Timeout, server not responding."); |
| 454 | packet_start(SSH2_MSG_GLOBAL_REQUEST); |
| 455 | packet_put_cstring("keepalive@openssh.com"); |
| 456 | packet_put_char(1); /* boolean: want reply */ |
| 457 | packet_send(); |
| 458 | } |
| 459 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 460 | /* |
| 461 | * Waits until the client can do something (some data becomes available on |
| 462 | * one of the file descriptors). |
| 463 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 464 | static void |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 465 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
Darren Tucker | c7a6fc4 | 2004-08-13 21:18:00 +1000 | [diff] [blame] | 466 | int *maxfdp, u_int *nallocp, int rekeying) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 467 | { |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 468 | struct timeval tv, *tvp; |
| 469 | int ret; |
| 470 | |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 471 | /* Add any selections by the channel mechanism. */ |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 472 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 473 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 474 | if (!compat20) { |
| 475 | /* Read from the connection, unless our buffers are full. */ |
| 476 | if (buffer_len(&stdout_buffer) < buffer_high && |
| 477 | buffer_len(&stderr_buffer) < buffer_high && |
| 478 | channel_not_very_much_buffered_data()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 479 | FD_SET(connection_in, *readsetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 480 | /* |
| 481 | * Read from stdin, unless we have seen EOF or have very much |
| 482 | * buffered data to send to the server. |
| 483 | */ |
| 484 | if (!stdin_eof && packet_not_very_much_data_to_write()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 485 | FD_SET(fileno(stdin), *readsetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 486 | |
| 487 | /* Select stdout/stderr if have data in buffer. */ |
| 488 | if (buffer_len(&stdout_buffer) > 0) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 489 | FD_SET(fileno(stdout), *writesetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 490 | if (buffer_len(&stderr_buffer) > 0) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 491 | FD_SET(fileno(stderr), *writesetp); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 492 | } else { |
Ben Lindstrom | c8b3f47 | 2001-05-17 03:19:40 +0000 | [diff] [blame] | 493 | /* channel_prepare_select could have closed the last channel */ |
Damien Miller | 164a7f4 | 2001-10-12 11:36:09 +1000 | [diff] [blame] | 494 | if (session_closed && !channel_still_open() && |
| 495 | !packet_have_data_to_write()) { |
| 496 | /* clear mask since we did not call select() */ |
Damien Miller | 79faeff | 2001-11-12 11:06:32 +1100 | [diff] [blame] | 497 | memset(*readsetp, 0, *nallocp); |
| 498 | memset(*writesetp, 0, *nallocp); |
Damien Miller | 164a7f4 | 2001-10-12 11:36:09 +1000 | [diff] [blame] | 499 | return; |
Ben Lindstrom | c8b3f47 | 2001-05-17 03:19:40 +0000 | [diff] [blame] | 500 | } else { |
| 501 | FD_SET(connection_in, *readsetp); |
| 502 | } |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 503 | } |
| 504 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 505 | /* Select server connection if have data to write to the server. */ |
| 506 | if (packet_have_data_to_write()) |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 507 | FD_SET(connection_out, *writesetp); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 508 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 509 | if (control_fd != -1) |
| 510 | FD_SET(control_fd, *readsetp); |
| 511 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 512 | /* |
| 513 | * Wait for something to happen. This will suspend the process until |
| 514 | * some selected descriptor can be read, written, or has some other |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 515 | * event pending. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 516 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 517 | |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 518 | if (options.server_alive_interval == 0 || !compat20) |
| 519 | tvp = NULL; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 520 | else { |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 521 | tv.tv_sec = options.server_alive_interval; |
| 522 | tv.tv_usec = 0; |
| 523 | tvp = &tv; |
| 524 | } |
| 525 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); |
| 526 | if (ret < 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 527 | char buf[100]; |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 528 | |
| 529 | /* |
| 530 | * We have to clear the select masks, because we return. |
| 531 | * We have to return, because the mainloop checks for the flags |
| 532 | * set by the signal handlers. |
| 533 | */ |
Damien Miller | 79faeff | 2001-11-12 11:06:32 +1100 | [diff] [blame] | 534 | memset(*readsetp, 0, *nallocp); |
| 535 | memset(*writesetp, 0, *nallocp); |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 536 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 537 | if (errno == EINTR) |
| 538 | return; |
| 539 | /* Note: we might still have data in the buffers. */ |
| 540 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); |
| 541 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 542 | quit_pending = 1; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 543 | } else if (ret == 0) |
| 544 | server_alive_check(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 545 | } |
| 546 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 547 | static void |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 548 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 549 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 550 | /* Flush stdout and stderr buffers. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 551 | if (buffer_len(bout) > 0) |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 552 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 553 | if (buffer_len(berr) > 0) |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 554 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 555 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 556 | leave_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 557 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 558 | /* |
| 559 | * Free (and clear) the buffer to reduce the amount of data that gets |
| 560 | * written to swap. |
| 561 | */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 562 | buffer_free(bin); |
| 563 | buffer_free(bout); |
| 564 | buffer_free(berr); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 565 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 566 | /* Send the suspend signal to the program itself. */ |
| 567 | kill(getpid(), SIGTSTP); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 568 | |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 569 | /* Reset window sizes in case they have changed */ |
| 570 | received_window_change_signal = 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 571 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 572 | /* OK, we have been continued by the user. Reinitialize buffers. */ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 573 | buffer_init(bin); |
| 574 | buffer_init(bout); |
| 575 | buffer_init(berr); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 576 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 577 | enter_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 578 | } |
| 579 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 580 | static void |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 581 | client_process_net_input(fd_set * readset) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 582 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 583 | int len; |
| 584 | char buf[8192]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 585 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 586 | /* |
| 587 | * Read input from the server, and add any such data to the buffer of |
| 588 | * the packet subsystem. |
| 589 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 590 | if (FD_ISSET(connection_in, readset)) { |
| 591 | /* Read as much as possible. */ |
| 592 | len = read(connection_in, buf, sizeof(buf)); |
| 593 | if (len == 0) { |
| 594 | /* Received EOF. The remote host has closed the connection. */ |
| 595 | snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", |
| 596 | host); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 597 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 598 | quit_pending = 1; |
| 599 | return; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 600 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 601 | /* |
| 602 | * There is a kernel bug on Solaris that causes select to |
| 603 | * sometimes wake up even though there is no data available. |
| 604 | */ |
Ben Lindstrom | ebc8827 | 2001-03-06 03:34:40 +0000 | [diff] [blame] | 605 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 606 | len = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 607 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 608 | if (len < 0) { |
| 609 | /* An error has encountered. Perhaps there is a network problem. */ |
| 610 | snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", |
| 611 | host, strerror(errno)); |
| 612 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 613 | quit_pending = 1; |
| 614 | return; |
| 615 | } |
| 616 | packet_process_incoming(buf, len); |
| 617 | } |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 618 | } |
| 619 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 620 | static void |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 621 | client_subsystem_reply(int type, u_int32_t seq, void *ctxt) |
| 622 | { |
| 623 | int id; |
| 624 | Channel *c; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 625 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 626 | id = packet_get_int(); |
| 627 | packet_check_eom(); |
| 628 | |
| 629 | if ((c = channel_lookup(id)) == NULL) { |
| 630 | error("%s: no channel for id %d", __func__, id); |
| 631 | return; |
| 632 | } |
| 633 | |
| 634 | if (type == SSH2_MSG_CHANNEL_SUCCESS) |
| 635 | debug2("Request suceeded on channel %d", id); |
| 636 | else if (type == SSH2_MSG_CHANNEL_FAILURE) { |
| 637 | error("Request failed on channel %d", id); |
| 638 | channel_free(c); |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | static void |
| 643 | client_extra_session2_setup(int id, void *arg) |
| 644 | { |
| 645 | struct confirm_ctx *cctx = arg; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 646 | const char *display; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 647 | Channel *c; |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 648 | int i; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 649 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 650 | if (cctx == NULL) |
| 651 | fatal("%s: cctx == NULL", __func__); |
| 652 | if ((c = channel_lookup(id)) == NULL) |
| 653 | fatal("%s: no channel for id %d", __func__, id); |
| 654 | |
Damien Miller | 46d38de | 2005-07-17 17:02:09 +1000 | [diff] [blame] | 655 | display = getenv("DISPLAY"); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 656 | if (cctx->want_x_fwd && options.forward_x11 && display != NULL) { |
| 657 | char *proto, *data; |
| 658 | /* Get reasonable local authentication information. */ |
| 659 | client_x11_get_proto(display, options.xauth_location, |
| 660 | options.forward_x11_trusted, &proto, &data); |
| 661 | /* Request forwarding with authentication spoofing. */ |
| 662 | debug("Requesting X11 forwarding with authentication spoofing."); |
| 663 | x11_request_forwarding_with_spoofing(id, display, proto, data); |
| 664 | /* XXX wait for reply */ |
| 665 | } |
| 666 | |
| 667 | if (cctx->want_agent_fwd && options.forward_agent) { |
| 668 | debug("Requesting authentication agent forwarding."); |
| 669 | channel_request_start(id, "auth-agent-req@openssh.com", 0); |
| 670 | packet_send(); |
| 671 | } |
| 672 | |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 673 | client_session2_setup(id, cctx->want_tty, cctx->want_subsys, |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 674 | cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env, |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 675 | client_subsystem_reply); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 676 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 677 | c->confirm_ctx = NULL; |
| 678 | buffer_free(&cctx->cmd); |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 679 | xfree(cctx->term); |
| 680 | if (cctx->env != NULL) { |
| 681 | for (i = 0; cctx->env[i] != NULL; i++) |
| 682 | xfree(cctx->env[i]); |
| 683 | xfree(cctx->env); |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 684 | } |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 685 | xfree(cctx); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | static void |
| 689 | client_process_control(fd_set * readset) |
| 690 | { |
| 691 | Buffer m; |
| 692 | Channel *c; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 693 | int client_fd, new_fd[3], ver, allowed; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 694 | socklen_t addrlen; |
| 695 | struct sockaddr_storage addr; |
| 696 | struct confirm_ctx *cctx; |
| 697 | char *cmd; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 698 | u_int i, len, env_len, command, flags; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 699 | uid_t euid; |
| 700 | gid_t egid; |
| 701 | |
| 702 | /* |
| 703 | * Accept connection on control socket |
| 704 | */ |
| 705 | if (control_fd == -1 || !FD_ISSET(control_fd, readset)) |
| 706 | return; |
| 707 | |
| 708 | memset(&addr, 0, sizeof(addr)); |
| 709 | addrlen = sizeof(addr); |
| 710 | if ((client_fd = accept(control_fd, |
| 711 | (struct sockaddr*)&addr, &addrlen)) == -1) { |
| 712 | error("%s accept: %s", __func__, strerror(errno)); |
| 713 | return; |
| 714 | } |
| 715 | |
| 716 | if (getpeereid(client_fd, &euid, &egid) < 0) { |
| 717 | error("%s getpeereid failed: %s", __func__, strerror(errno)); |
| 718 | close(client_fd); |
| 719 | return; |
| 720 | } |
| 721 | if ((euid != 0) && (getuid() != euid)) { |
| 722 | error("control mode uid mismatch: peer euid %u != uid %u", |
| 723 | (u_int) euid, (u_int) getuid()); |
| 724 | close(client_fd); |
| 725 | return; |
| 726 | } |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 727 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 728 | unset_nonblock(client_fd); |
| 729 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 730 | /* Read command */ |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 731 | buffer_init(&m); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 732 | if (ssh_msg_recv(client_fd, &m) == -1) { |
| 733 | error("%s: client msg_recv failed", __func__); |
| 734 | close(client_fd); |
| 735 | buffer_free(&m); |
| 736 | return; |
| 737 | } |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 738 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 739 | error("%s: wrong client version %d", __func__, ver); |
| 740 | buffer_free(&m); |
| 741 | close(client_fd); |
| 742 | return; |
| 743 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 744 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 745 | allowed = 1; |
| 746 | command = buffer_get_int(&m); |
| 747 | flags = buffer_get_int(&m); |
| 748 | |
| 749 | buffer_clear(&m); |
| 750 | |
| 751 | switch (command) { |
| 752 | case SSHMUX_COMMAND_OPEN: |
Damien Miller | d14b1e7 | 2005-06-16 13:19:41 +1000 | [diff] [blame] | 753 | if (options.control_master == SSHCTL_MASTER_ASK || |
| 754 | options.control_master == SSHCTL_MASTER_AUTO_ASK) |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 755 | allowed = ask_permission("Allow shared connection " |
| 756 | "to %s? ", host); |
| 757 | /* continue below */ |
| 758 | break; |
| 759 | case SSHMUX_COMMAND_TERMINATE: |
Damien Miller | d14b1e7 | 2005-06-16 13:19:41 +1000 | [diff] [blame] | 760 | if (options.control_master == SSHCTL_MASTER_ASK || |
| 761 | options.control_master == SSHCTL_MASTER_AUTO_ASK) |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 762 | allowed = ask_permission("Terminate shared connection " |
| 763 | "to %s? ", host); |
| 764 | if (allowed) |
| 765 | quit_pending = 1; |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 766 | /* FALLTHROUGH */ |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 767 | case SSHMUX_COMMAND_ALIVE_CHECK: |
| 768 | /* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */ |
| 769 | buffer_clear(&m); |
| 770 | buffer_put_int(&m, allowed); |
| 771 | buffer_put_int(&m, getpid()); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 772 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 773 | error("%s: client msg_send failed", __func__); |
| 774 | close(client_fd); |
| 775 | buffer_free(&m); |
| 776 | return; |
| 777 | } |
| 778 | buffer_free(&m); |
| 779 | close(client_fd); |
| 780 | return; |
| 781 | default: |
| 782 | error("Unsupported command %d", command); |
| 783 | buffer_free(&m); |
| 784 | close(client_fd); |
| 785 | return; |
| 786 | } |
| 787 | |
| 788 | /* Reply for SSHMUX_COMMAND_OPEN */ |
| 789 | buffer_clear(&m); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 790 | buffer_put_int(&m, allowed); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 791 | buffer_put_int(&m, getpid()); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 792 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 793 | error("%s: client msg_send failed", __func__); |
| 794 | close(client_fd); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 795 | buffer_free(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 796 | return; |
| 797 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 798 | |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 799 | if (!allowed) { |
| 800 | error("Refused control connection"); |
| 801 | close(client_fd); |
| 802 | buffer_free(&m); |
| 803 | return; |
| 804 | } |
| 805 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 806 | buffer_clear(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 807 | if (ssh_msg_recv(client_fd, &m) == -1) { |
| 808 | error("%s: client msg_recv failed", __func__); |
| 809 | close(client_fd); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 810 | buffer_free(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 811 | return; |
| 812 | } |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 813 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 814 | error("%s: wrong client version %d", __func__, ver); |
| 815 | buffer_free(&m); |
| 816 | close(client_fd); |
| 817 | return; |
| 818 | } |
| 819 | |
| 820 | cctx = xmalloc(sizeof(*cctx)); |
| 821 | memset(cctx, 0, sizeof(*cctx)); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 822 | cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0; |
| 823 | cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 824 | cctx->want_x_fwd = (flags & SSHMUX_FLAG_X11_FWD) != 0; |
| 825 | cctx->want_agent_fwd = (flags & SSHMUX_FLAG_AGENT_FWD) != 0; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 826 | cctx->term = buffer_get_string(&m, &len); |
| 827 | |
| 828 | cmd = buffer_get_string(&m, &len); |
| 829 | buffer_init(&cctx->cmd); |
| 830 | buffer_append(&cctx->cmd, cmd, strlen(cmd)); |
| 831 | |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 832 | env_len = buffer_get_int(&m); |
| 833 | env_len = MIN(env_len, 4096); |
| 834 | debug3("%s: receiving %d env vars", __func__, env_len); |
| 835 | if (env_len != 0) { |
| 836 | cctx->env = xmalloc(sizeof(*cctx->env) * (env_len + 1)); |
| 837 | for (i = 0; i < env_len; i++) |
| 838 | cctx->env[i] = buffer_get_string(&m, &len); |
| 839 | cctx->env[i] = NULL; |
| 840 | } |
| 841 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 842 | debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__, |
| 843 | cctx->want_tty, cctx->want_subsys, cmd); |
| 844 | |
| 845 | /* Gather fds from client */ |
| 846 | new_fd[0] = mm_receive_fd(client_fd); |
| 847 | new_fd[1] = mm_receive_fd(client_fd); |
| 848 | new_fd[2] = mm_receive_fd(client_fd); |
| 849 | |
| 850 | debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__, |
| 851 | new_fd[0], new_fd[1], new_fd[2]); |
| 852 | |
| 853 | /* Try to pick up ttymodes from client before it goes raw */ |
| 854 | if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) |
| 855 | error("%s: tcgetattr: %s", __func__, strerror(errno)); |
| 856 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 857 | /* This roundtrip is just for synchronisation of ttymodes */ |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 858 | buffer_clear(&m); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 859 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 860 | error("%s: client msg_send failed", __func__); |
| 861 | close(client_fd); |
| 862 | close(new_fd[0]); |
| 863 | close(new_fd[1]); |
| 864 | close(new_fd[2]); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 865 | buffer_free(&m); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 866 | xfree(cctx->term); |
| 867 | if (env_len != 0) { |
| 868 | for (i = 0; i < env_len; i++) |
| 869 | xfree(cctx->env[i]); |
| 870 | xfree(cctx->env); |
| 871 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 872 | return; |
| 873 | } |
| 874 | buffer_free(&m); |
| 875 | |
| 876 | /* enable nonblocking unless tty */ |
| 877 | if (!isatty(new_fd[0])) |
| 878 | set_nonblock(new_fd[0]); |
| 879 | if (!isatty(new_fd[1])) |
| 880 | set_nonblock(new_fd[1]); |
| 881 | if (!isatty(new_fd[2])) |
| 882 | set_nonblock(new_fd[2]); |
| 883 | |
| 884 | set_nonblock(client_fd); |
| 885 | |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 886 | c = channel_new("session", SSH_CHANNEL_OPENING, |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 887 | new_fd[0], new_fd[1], new_fd[2], |
| 888 | CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT, |
| 889 | CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0); |
| 890 | |
| 891 | /* XXX */ |
| 892 | c->ctl_fd = client_fd; |
| 893 | |
| 894 | debug3("%s: channel_new: %d", __func__, c->self); |
| 895 | |
| 896 | channel_send_open(c->self); |
| 897 | channel_register_confirm(c->self, client_extra_session2_setup, cctx); |
| 898 | } |
| 899 | |
| 900 | static void |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 901 | process_cmdline(void) |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 902 | { |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 903 | void (*handler)(int); |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 904 | char *s, *cmd, *cancel_host; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 905 | int delete = 0; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 906 | int local = 0; |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 907 | u_short cancel_port; |
| 908 | Forward fwd; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 909 | |
| 910 | leave_raw_mode(); |
Ben Lindstrom | 5a6abda | 2002-06-09 19:41:48 +0000 | [diff] [blame] | 911 | handler = signal(SIGINT, SIG_IGN); |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 912 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 913 | if (s == NULL) |
| 914 | goto out; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 915 | while (*s && isspace(*s)) |
| 916 | s++; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 917 | if (*s == '-') |
| 918 | s++; /* Skip cmdline '-', if any */ |
Darren Tucker | e167582 | 2004-05-24 10:13:07 +1000 | [diff] [blame] | 919 | if (*s == '\0') |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 920 | goto out; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 921 | |
Darren Tucker | 1973c88 | 2004-05-24 10:34:36 +1000 | [diff] [blame] | 922 | if (*s == 'h' || *s == 'H' || *s == '?') { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 923 | logit("Commands:"); |
| 924 | logit(" -Lport:host:hostport Request local forward"); |
| 925 | logit(" -Rport:host:hostport Request remote forward"); |
| 926 | logit(" -KRhostport Cancel remote forward"); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 927 | if (!options.permit_local_command) |
| 928 | goto out; |
| 929 | logit(" !args Execute local command"); |
| 930 | goto out; |
| 931 | } |
| 932 | |
| 933 | if (*s == '!' && options.permit_local_command) { |
| 934 | s++; |
| 935 | ssh_local_cmd(s); |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 936 | goto out; |
| 937 | } |
| 938 | |
| 939 | if (*s == 'K') { |
| 940 | delete = 1; |
| 941 | s++; |
| 942 | } |
| 943 | if (*s != 'L' && *s != 'R') { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 944 | logit("Invalid command."); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 945 | goto out; |
| 946 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 947 | if (*s == 'L') |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 948 | local = 1; |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 949 | if (local && delete) { |
| 950 | logit("Not supported."); |
| 951 | goto out; |
| 952 | } |
| 953 | if ((!local || delete) && !compat20) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 954 | logit("Not supported for SSH protocol version 1."); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 955 | goto out; |
| 956 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 957 | |
| 958 | s++; |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 959 | while (*s && isspace(*s)) |
| 960 | s++; |
| 961 | |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 962 | if (delete) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 963 | cancel_port = 0; |
| 964 | cancel_host = hpdelim(&s); /* may be NULL */ |
| 965 | if (s != NULL) { |
| 966 | cancel_port = a2port(s); |
| 967 | cancel_host = cleanhostname(cancel_host); |
| 968 | } else { |
| 969 | cancel_port = a2port(cancel_host); |
| 970 | cancel_host = NULL; |
| 971 | } |
| 972 | if (cancel_port == 0) { |
| 973 | logit("Bad forwarding close port"); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 974 | goto out; |
| 975 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 976 | channel_request_rforward_cancel(cancel_host, cancel_port); |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 977 | } else { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 978 | if (!parse_forward(&fwd, s)) { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 979 | logit("Bad forwarding specification."); |
| 980 | goto out; |
| 981 | } |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 982 | if (local) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 983 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
| 984 | fwd.listen_port, fwd.connect_host, |
| 985 | fwd.connect_port, options.gateway_ports) < 0) { |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 986 | logit("Port forwarding failed."); |
| 987 | goto out; |
| 988 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 989 | } else { |
| 990 | channel_request_remote_forwarding(fwd.listen_host, |
| 991 | fwd.listen_port, fwd.connect_host, |
| 992 | fwd.connect_port); |
| 993 | } |
| 994 | |
Darren Tucker | e7066df | 2004-05-24 10:18:05 +1000 | [diff] [blame] | 995 | logit("Forwarding port."); |
| 996 | } |
| 997 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 998 | out: |
| 999 | signal(SIGINT, handler); |
| 1000 | enter_raw_mode(); |
| 1001 | if (cmd) |
| 1002 | xfree(cmd); |
| 1003 | } |
| 1004 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1005 | /* process the characters one by one */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1006 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1007 | process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len) |
| 1008 | { |
| 1009 | char string[1024]; |
| 1010 | pid_t pid; |
| 1011 | int bytes = 0; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1012 | u_int i; |
| 1013 | u_char ch; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1014 | char *s; |
| 1015 | |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 1016 | if (len <= 0) |
| 1017 | return (0); |
| 1018 | |
| 1019 | for (i = 0; i < (u_int)len; i++) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1020 | /* Get one character at a time. */ |
| 1021 | ch = buf[i]; |
| 1022 | |
| 1023 | if (escape_pending) { |
| 1024 | /* We have previously seen an escape character. */ |
| 1025 | /* Clear the flag now. */ |
| 1026 | escape_pending = 0; |
| 1027 | |
| 1028 | /* Process the escaped character. */ |
| 1029 | switch (ch) { |
| 1030 | case '.': |
| 1031 | /* Terminate the connection. */ |
| 1032 | snprintf(string, sizeof string, "%c.\r\n", escape_char); |
| 1033 | buffer_append(berr, string, strlen(string)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1034 | |
| 1035 | quit_pending = 1; |
| 1036 | return -1; |
| 1037 | |
| 1038 | case 'Z' - 64: |
| 1039 | /* Suspend the program. */ |
| 1040 | /* Print a message to that effect to the user. */ |
| 1041 | snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char); |
| 1042 | buffer_append(berr, string, strlen(string)); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1043 | |
| 1044 | /* Restore terminal modes and suspend. */ |
| 1045 | client_suspend_self(bin, bout, berr); |
| 1046 | |
| 1047 | /* We have been continued. */ |
| 1048 | continue; |
| 1049 | |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1050 | case 'B': |
| 1051 | if (compat20) { |
| 1052 | snprintf(string, sizeof string, |
| 1053 | "%cB\r\n", escape_char); |
| 1054 | buffer_append(berr, string, |
| 1055 | strlen(string)); |
| 1056 | channel_request_start(session_ident, |
| 1057 | "break", 0); |
| 1058 | packet_put_int(1000); |
| 1059 | packet_send(); |
| 1060 | } |
| 1061 | continue; |
| 1062 | |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1063 | case 'R': |
Ben Lindstrom | 11bd899 | 2001-04-05 23:34:29 +0000 | [diff] [blame] | 1064 | if (compat20) { |
| 1065 | if (datafellows & SSH_BUG_NOREKEY) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 1066 | logit("Server does not support re-keying"); |
Ben Lindstrom | 11bd899 | 2001-04-05 23:34:29 +0000 | [diff] [blame] | 1067 | else |
| 1068 | need_rekeying = 1; |
| 1069 | } |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1070 | continue; |
| 1071 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1072 | case '&': |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1073 | /* |
| 1074 | * Detach the program (continue to serve connections, |
| 1075 | * but put in background and no more new connections). |
| 1076 | */ |
Damien Miller | 96507ef | 2001-11-12 10:52:25 +1100 | [diff] [blame] | 1077 | /* Restore tty modes. */ |
| 1078 | leave_raw_mode(); |
| 1079 | |
| 1080 | /* Stop listening for new connections. */ |
| 1081 | channel_stop_listening(); |
| 1082 | |
| 1083 | snprintf(string, sizeof string, |
| 1084 | "%c& [backgrounded]\n", escape_char); |
| 1085 | buffer_append(berr, string, strlen(string)); |
| 1086 | |
| 1087 | /* Fork into background. */ |
| 1088 | pid = fork(); |
| 1089 | if (pid < 0) { |
| 1090 | error("fork: %.100s", strerror(errno)); |
| 1091 | continue; |
| 1092 | } |
| 1093 | if (pid != 0) { /* This is the parent. */ |
| 1094 | /* The parent just exits. */ |
| 1095 | exit(0); |
| 1096 | } |
| 1097 | /* The child continues serving connections. */ |
| 1098 | if (compat20) { |
| 1099 | buffer_append(bin, "\004", 1); |
| 1100 | /* fake EOF on stdin */ |
| 1101 | return -1; |
| 1102 | } else if (!stdin_eof) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1103 | /* |
| 1104 | * Sending SSH_CMSG_EOF alone does not always appear |
| 1105 | * to be enough. So we try to send an EOF character |
| 1106 | * first. |
| 1107 | */ |
| 1108 | packet_start(SSH_CMSG_STDIN_DATA); |
| 1109 | packet_put_string("\004", 1); |
| 1110 | packet_send(); |
| 1111 | /* Close stdin. */ |
| 1112 | stdin_eof = 1; |
| 1113 | if (buffer_len(bin) == 0) { |
| 1114 | packet_start(SSH_CMSG_EOF); |
| 1115 | packet_send(); |
| 1116 | } |
| 1117 | } |
Damien Miller | 96507ef | 2001-11-12 10:52:25 +1100 | [diff] [blame] | 1118 | continue; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1119 | |
| 1120 | case '?': |
| 1121 | snprintf(string, sizeof string, |
| 1122 | "%c?\r\n\ |
| 1123 | Supported escape sequences:\r\n\ |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1124 | %c. - terminate connection\r\n\ |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1125 | %cB - send a BREAK to the remote system\r\n\ |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1126 | %cC - open a command line\r\n\ |
| 1127 | %cR - Request rekey (SSH protocol 2 only)\r\n\ |
| 1128 | %c^Z - suspend ssh\r\n\ |
| 1129 | %c# - list forwarded connections\r\n\ |
| 1130 | %c& - background ssh (when waiting for connections to terminate)\r\n\ |
| 1131 | %c? - this message\r\n\ |
| 1132 | %c%c - send the escape character by typing it twice\r\n\ |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1133 | (Note that escapes are only recognized immediately after newline.)\r\n", |
Damien Miller | 0669286 | 2002-09-04 16:32:10 +1000 | [diff] [blame] | 1134 | escape_char, escape_char, escape_char, escape_char, |
| 1135 | escape_char, escape_char, escape_char, escape_char, |
Damien Miller | 54c4598 | 2003-05-15 10:20:13 +1000 | [diff] [blame] | 1136 | escape_char, escape_char, escape_char); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1137 | buffer_append(berr, string, strlen(string)); |
| 1138 | continue; |
| 1139 | |
| 1140 | case '#': |
| 1141 | snprintf(string, sizeof string, "%c#\r\n", escape_char); |
| 1142 | buffer_append(berr, string, strlen(string)); |
| 1143 | s = channel_open_message(); |
| 1144 | buffer_append(berr, s, strlen(s)); |
| 1145 | xfree(s); |
| 1146 | continue; |
| 1147 | |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1148 | case 'C': |
Ben Lindstrom | 681d932 | 2002-03-22 03:53:00 +0000 | [diff] [blame] | 1149 | process_cmdline(); |
Ben Lindstrom | 5589f4b | 2002-03-22 03:24:32 +0000 | [diff] [blame] | 1150 | continue; |
| 1151 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1152 | default: |
| 1153 | if (ch != escape_char) { |
| 1154 | buffer_put_char(bin, escape_char); |
| 1155 | bytes++; |
| 1156 | } |
| 1157 | /* Escaped characters fall through here */ |
| 1158 | break; |
| 1159 | } |
| 1160 | } else { |
| 1161 | /* |
| 1162 | * The previous character was not an escape char. Check if this |
| 1163 | * is an escape. |
| 1164 | */ |
| 1165 | if (last_was_cr && ch == escape_char) { |
| 1166 | /* It is. Set the flag and continue to next character. */ |
| 1167 | escape_pending = 1; |
| 1168 | continue; |
| 1169 | } |
| 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * Normal character. Record whether it was a newline, |
| 1174 | * and append it to the buffer. |
| 1175 | */ |
| 1176 | last_was_cr = (ch == '\r' || ch == '\n'); |
| 1177 | buffer_put_char(bin, ch); |
| 1178 | bytes++; |
| 1179 | } |
| 1180 | return bytes; |
| 1181 | } |
| 1182 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1183 | static void |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1184 | client_process_input(fd_set * readset) |
| 1185 | { |
Damien Miller | 166fca8 | 2000-04-20 07:42:21 +1000 | [diff] [blame] | 1186 | int len; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1187 | char buf[8192]; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1188 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1189 | /* Read input from stdin. */ |
| 1190 | if (FD_ISSET(fileno(stdin), readset)) { |
| 1191 | /* Read as much as possible. */ |
| 1192 | len = read(fileno(stdin), buf, sizeof(buf)); |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1193 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
| 1194 | return; /* we'll try again later */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1195 | if (len <= 0) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1196 | /* |
| 1197 | * Received EOF or error. They are treated |
| 1198 | * similarly, except that an error message is printed |
| 1199 | * if it was an error condition. |
| 1200 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1201 | if (len < 0) { |
| 1202 | snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); |
| 1203 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1204 | } |
| 1205 | /* Mark that we have seen EOF. */ |
| 1206 | stdin_eof = 1; |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1207 | /* |
| 1208 | * Send an EOF message to the server unless there is |
| 1209 | * data in the buffer. If there is data in the |
| 1210 | * buffer, no message will be sent now. Code |
| 1211 | * elsewhere will send the EOF when the buffer |
| 1212 | * becomes empty if stdin_eof is set. |
| 1213 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1214 | if (buffer_len(&stdin_buffer) == 0) { |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1215 | packet_start(SSH_CMSG_EOF); |
| 1216 | packet_send(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1217 | } |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1218 | } else if (escape_char == SSH_ESCAPECHAR_NONE) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1219 | /* |
| 1220 | * Normal successful read, and no escape character. |
| 1221 | * Just append the data to buffer. |
| 1222 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1223 | buffer_append(&stdin_buffer, buf, len); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1224 | } else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1225 | /* |
| 1226 | * Normal, successful read. But we have an escape character |
| 1227 | * and have to process the characters one by one. |
| 1228 | */ |
Ben Lindstrom | e9613cf | 2001-03-05 06:14:02 +0000 | [diff] [blame] | 1229 | if (process_escapes(&stdin_buffer, &stdout_buffer, |
| 1230 | &stderr_buffer, buf, len) == -1) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1231 | return; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1232 | } |
| 1233 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1234 | } |
| 1235 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1236 | static void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1237 | client_process_output(fd_set * writeset) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1238 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1239 | int len; |
| 1240 | char buf[100]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1241 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1242 | /* Write buffered output to stdout. */ |
| 1243 | if (FD_ISSET(fileno(stdout), writeset)) { |
| 1244 | /* Write as much data as possible. */ |
| 1245 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1246 | buffer_len(&stdout_buffer)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1247 | if (len <= 0) { |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1248 | if (errno == EINTR || errno == EAGAIN) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1249 | len = 0; |
| 1250 | else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1251 | /* |
| 1252 | * An error or EOF was encountered. Put an |
| 1253 | * error message to stderr buffer. |
| 1254 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1255 | snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
| 1256 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1257 | quit_pending = 1; |
| 1258 | return; |
| 1259 | } |
| 1260 | } |
| 1261 | /* Consume printed data from the buffer. */ |
| 1262 | buffer_consume(&stdout_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1263 | stdout_bytes += len; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1264 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1265 | /* Write buffered output to stderr. */ |
| 1266 | if (FD_ISSET(fileno(stderr), writeset)) { |
| 1267 | /* Write as much data as possible. */ |
| 1268 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1269 | buffer_len(&stderr_buffer)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1270 | if (len <= 0) { |
Ben Lindstrom | 4c8cff1 | 2001-04-17 18:09:42 +0000 | [diff] [blame] | 1271 | if (errno == EINTR || errno == EAGAIN) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1272 | len = 0; |
| 1273 | else { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1274 | /* EOF or error, but can't even print error message. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1275 | quit_pending = 1; |
| 1276 | return; |
| 1277 | } |
| 1278 | } |
| 1279 | /* Consume printed characters from the buffer. */ |
| 1280 | buffer_consume(&stderr_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1281 | stderr_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1282 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1283 | } |
| 1284 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1285 | /* |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1286 | * Get packets from the connection input buffer, and process them as long as |
| 1287 | * there are packets available. |
| 1288 | * |
| 1289 | * Any unknown packets received during the actual |
| 1290 | * session cause the session to terminate. This is |
| 1291 | * intended to make debugging easier since no |
| 1292 | * confirmations are sent. Any compatible protocol |
| 1293 | * extensions must be negotiated during the |
| 1294 | * preparatory phase. |
| 1295 | */ |
| 1296 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1297 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1298 | client_process_buffered_input_packets(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1299 | { |
Ben Lindstrom | f28f634 | 2001-04-04 02:03:04 +0000 | [diff] [blame] | 1300 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1301 | } |
| 1302 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1303 | /* scan buf[] for '~' before sending data to the peer */ |
| 1304 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1305 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1306 | simple_escape_filter(Channel *c, char *buf, int len) |
| 1307 | { |
| 1308 | /* XXX we assume c->extended is writeable */ |
| 1309 | return process_escapes(&c->input, &c->output, &c->extended, buf, len); |
| 1310 | } |
| 1311 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1312 | static void |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1313 | client_channel_closed(int id, void *arg) |
| 1314 | { |
Damien Miller | 3ec2759 | 2001-10-12 11:35:04 +1000 | [diff] [blame] | 1315 | channel_cancel_cleanup(id); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1316 | session_closed = 1; |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 1317 | leave_raw_mode(); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1318 | } |
| 1319 | |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1320 | /* |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1321 | * Implements the interactive session with the server. This is called after |
| 1322 | * 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] | 1323 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
| 1324 | * used as an escape character for terminating or suspending the session. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1325 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1326 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 1327 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1328 | 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] | 1329 | { |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1330 | fd_set *readset = NULL, *writeset = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1331 | double start_time, total_time; |
Darren Tucker | c7a6fc4 | 2004-08-13 21:18:00 +1000 | [diff] [blame] | 1332 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
| 1333 | u_int nalloc = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1334 | char buf[100]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1335 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1336 | debug("Entering interactive session."); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1337 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1338 | start_time = get_current_time(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1339 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1340 | /* Initialize variables. */ |
| 1341 | escape_pending = 0; |
| 1342 | last_was_cr = 1; |
| 1343 | exit_status = -1; |
| 1344 | stdin_eof = 0; |
| 1345 | buffer_high = 64 * 1024; |
| 1346 | connection_in = packet_get_connection_in(); |
| 1347 | connection_out = packet_get_connection_out(); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1348 | max_fd = MAX(connection_in, connection_out); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1349 | if (control_fd != -1) |
| 1350 | max_fd = MAX(max_fd, control_fd); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1351 | |
| 1352 | if (!compat20) { |
Ben Lindstrom | 302ea6f | 2001-04-16 02:01:25 +0000 | [diff] [blame] | 1353 | /* enable nonblocking unless tty */ |
| 1354 | if (!isatty(fileno(stdin))) |
| 1355 | set_nonblock(fileno(stdin)); |
| 1356 | if (!isatty(fileno(stdout))) |
| 1357 | set_nonblock(fileno(stdout)); |
| 1358 | if (!isatty(fileno(stderr))) |
| 1359 | set_nonblock(fileno(stderr)); |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1360 | max_fd = MAX(max_fd, fileno(stdin)); |
| 1361 | max_fd = MAX(max_fd, fileno(stdout)); |
| 1362 | max_fd = MAX(max_fd, fileno(stderr)); |
| 1363 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1364 | stdin_bytes = 0; |
| 1365 | stdout_bytes = 0; |
| 1366 | stderr_bytes = 0; |
| 1367 | quit_pending = 0; |
| 1368 | escape_char = escape_char_arg; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1369 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1370 | /* Initialize buffers. */ |
| 1371 | buffer_init(&stdin_buffer); |
| 1372 | buffer_init(&stdout_buffer); |
| 1373 | buffer_init(&stderr_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1374 | |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1375 | client_init_dispatch(); |
| 1376 | |
Ben Lindstrom | f49dbff | 2002-12-23 02:01:55 +0000 | [diff] [blame] | 1377 | /* |
| 1378 | * Set signal handlers, (e.g. to restore non-blocking mode) |
| 1379 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) |
| 1380 | */ |
Darren Tucker | 07336da | 2004-11-05 20:02:16 +1100 | [diff] [blame] | 1381 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
| 1382 | signal(SIGHUP, signal_handler); |
Ben Lindstrom | f49dbff | 2002-12-23 02:01:55 +0000 | [diff] [blame] | 1383 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 1384 | signal(SIGINT, signal_handler); |
| 1385 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) |
| 1386 | signal(SIGQUIT, signal_handler); |
| 1387 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
| 1388 | signal(SIGTERM, signal_handler); |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1389 | signal(SIGWINCH, window_change_handler); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1390 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1391 | if (have_pty) |
| 1392 | enter_raw_mode(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1393 | |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1394 | if (compat20) { |
| 1395 | session_ident = ssh2_chan_id; |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1396 | if (escape_char != SSH_ESCAPECHAR_NONE) |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1397 | channel_register_filter(session_ident, |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 1398 | simple_escape_filter, NULL); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1399 | if (session_ident != -1) |
| 1400 | channel_register_cleanup(session_ident, |
Damien Miller | 39eda6e | 2005-11-05 14:52:50 +1100 | [diff] [blame] | 1401 | client_channel_closed, 0); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1402 | } else { |
| 1403 | /* Check if we should immediately send eof on stdin. */ |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1404 | client_check_initial_eof_on_stdin(); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1405 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1406 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1407 | /* Main loop of the client for the interactive session mode. */ |
| 1408 | while (!quit_pending) { |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1409 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1410 | /* Process buffered packets sent by the server. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1411 | client_process_buffered_input_packets(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1412 | |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1413 | if (compat20 && session_closed && !channel_still_open()) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1414 | break; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1415 | |
| 1416 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1417 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1418 | if (rekeying) { |
| 1419 | debug("rekeying in progress"); |
| 1420 | } else { |
| 1421 | /* |
| 1422 | * Make packets of buffered stdin data, and buffer |
| 1423 | * them for sending to the server. |
| 1424 | */ |
| 1425 | if (!compat20) |
| 1426 | client_make_packets_from_stdin_data(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1427 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1428 | /* |
| 1429 | * Make packets from buffered channel data, and |
| 1430 | * enqueue them for sending to the server. |
| 1431 | */ |
| 1432 | if (packet_not_very_much_data_to_write()) |
| 1433 | channel_output_poll(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1434 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1435 | /* |
| 1436 | * Check if the window size has changed, and buffer a |
| 1437 | * message about it to the server if so. |
| 1438 | */ |
| 1439 | client_check_window_change(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1440 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1441 | if (quit_pending) |
| 1442 | break; |
| 1443 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1444 | /* |
| 1445 | * Wait until we have something to do (something becomes |
| 1446 | * available on one of the descriptors). |
| 1447 | */ |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 1448 | max_fd2 = max_fd; |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1449 | client_wait_until_can_do_something(&readset, &writeset, |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 1450 | &max_fd2, &nalloc, rekeying); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1451 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1452 | if (quit_pending) |
| 1453 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1454 | |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1455 | /* Do channel operations unless rekeying in progress. */ |
| 1456 | if (!rekeying) { |
| 1457 | channel_after_select(readset, writeset); |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 1458 | if (need_rekeying || packet_need_rekeying()) { |
| 1459 | debug("need rekeying"); |
Ben Lindstrom | be2cc43 | 2001-04-04 23:46:07 +0000 | [diff] [blame] | 1460 | xxx_kex->done = 0; |
| 1461 | kex_send_kexinit(xxx_kex); |
| 1462 | need_rekeying = 0; |
| 1463 | } |
| 1464 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1465 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1466 | /* Buffer input from the connection. */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1467 | client_process_net_input(readset); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1468 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1469 | /* Accept control connections. */ |
| 1470 | client_process_control(readset); |
| 1471 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1472 | if (quit_pending) |
| 1473 | break; |
| 1474 | |
| 1475 | if (!compat20) { |
| 1476 | /* Buffer data from stdin */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1477 | client_process_input(readset); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1478 | /* |
| 1479 | * Process output to stdout and stderr. Output to |
| 1480 | * the connection is processed elsewhere (above). |
| 1481 | */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1482 | client_process_output(writeset); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1483 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1484 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1485 | /* Send as much buffered packet data as possible to the sender. */ |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1486 | if (FD_ISSET(connection_out, writeset)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1487 | packet_write_poll(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1488 | } |
Damien Miller | 5e95321 | 2001-01-30 09:14:00 +1100 | [diff] [blame] | 1489 | if (readset) |
| 1490 | xfree(readset); |
| 1491 | if (writeset) |
| 1492 | xfree(writeset); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1493 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1494 | /* Terminate the session. */ |
| 1495 | |
| 1496 | /* Stop watching for window change. */ |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1497 | signal(SIGWINCH, SIG_DFL); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1498 | |
Ben Lindstrom | 601e436 | 2001-06-21 03:19:23 +0000 | [diff] [blame] | 1499 | channel_free_all(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1500 | |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 1501 | if (have_pty) |
| 1502 | leave_raw_mode(); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1503 | |
| 1504 | /* restore blocking io */ |
| 1505 | if (!isatty(fileno(stdin))) |
| 1506 | unset_nonblock(fileno(stdin)); |
| 1507 | if (!isatty(fileno(stdout))) |
| 1508 | unset_nonblock(fileno(stdout)); |
| 1509 | if (!isatty(fileno(stderr))) |
| 1510 | unset_nonblock(fileno(stderr)); |
| 1511 | |
Damien Miller | d696551 | 2003-12-17 16:31:53 +1100 | [diff] [blame] | 1512 | /* |
| 1513 | * If there was no shell or command requested, there will be no remote |
| 1514 | * exit status to be returned. In that case, clear error code if the |
| 1515 | * connection was deliberately terminated at this end. |
| 1516 | */ |
| 1517 | if (no_shell_flag && received_signal == SIGTERM) { |
| 1518 | received_signal = 0; |
| 1519 | exit_status = 0; |
| 1520 | } |
| 1521 | |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 1522 | if (received_signal) |
Ben Lindstrom | f8f065b | 2001-12-06 17:52:16 +0000 | [diff] [blame] | 1523 | fatal("Killed by signal %d.", (int) received_signal); |
Ben Lindstrom | ec46e0b | 2001-06-09 01:27:31 +0000 | [diff] [blame] | 1524 | |
| 1525 | /* |
| 1526 | * In interactive mode (with pseudo tty) display a message indicating |
| 1527 | * that the connection has been closed. |
| 1528 | */ |
| 1529 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { |
| 1530 | snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); |
| 1531 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
| 1532 | } |
| 1533 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1534 | /* Output any buffered data for stdout. */ |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1535 | while (buffer_len(&stdout_buffer) > 0) { |
| 1536 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1537 | buffer_len(&stdout_buffer)); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1538 | if (len <= 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1539 | error("Write failed flushing stdout buffer."); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1540 | break; |
| 1541 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1542 | buffer_consume(&stdout_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1543 | stdout_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1544 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1545 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1546 | /* Output any buffered data for stderr. */ |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1547 | while (buffer_len(&stderr_buffer) > 0) { |
| 1548 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), |
Damien Miller | 037a0dc | 1999-12-07 15:38:31 +1100 | [diff] [blame] | 1549 | buffer_len(&stderr_buffer)); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1550 | if (len <= 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1551 | error("Write failed flushing stderr buffer."); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 1552 | break; |
| 1553 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1554 | buffer_consume(&stderr_buffer, len); |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 1555 | stderr_bytes += len; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1556 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1557 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1558 | /* Clear and free any buffers. */ |
| 1559 | memset(buf, 0, sizeof(buf)); |
| 1560 | buffer_free(&stdin_buffer); |
| 1561 | buffer_free(&stdout_buffer); |
| 1562 | buffer_free(&stderr_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1563 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1564 | /* Report bytes transferred, and transfer rates. */ |
| 1565 | total_time = get_current_time() - start_time; |
| 1566 | debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 1567 | stdin_bytes, stdout_bytes, stderr_bytes, total_time); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1568 | if (total_time > 0) |
| 1569 | debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 1570 | stdin_bytes / total_time, stdout_bytes / total_time, |
| 1571 | stderr_bytes / total_time); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1572 | |
| 1573 | /* Return the exit status of the program. */ |
| 1574 | debug("Exit status %d", exit_status); |
| 1575 | return exit_status; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1576 | } |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1577 | |
| 1578 | /*********/ |
| 1579 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1580 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1581 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1582 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1583 | u_int data_len; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1584 | char *data = packet_get_string(&data_len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1585 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1586 | buffer_append(&stdout_buffer, data, data_len); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1587 | memset(data, 0, data_len); |
| 1588 | xfree(data); |
| 1589 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1590 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1591 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1592 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 1593 | u_int data_len; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1594 | char *data = packet_get_string(&data_len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1595 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1596 | buffer_append(&stderr_buffer, data, data_len); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1597 | memset(data, 0, data_len); |
| 1598 | xfree(data); |
| 1599 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1600 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1601 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1602 | { |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1603 | exit_status = packet_get_int(); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1604 | packet_check_eom(); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1605 | /* Acknowledge the exit. */ |
| 1606 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); |
| 1607 | packet_send(); |
| 1608 | /* |
| 1609 | * Must wait for packet to be sent since we are |
| 1610 | * exiting the loop. |
| 1611 | */ |
| 1612 | packet_write_wait(); |
| 1613 | /* Flag that we want to exit. */ |
| 1614 | quit_pending = 1; |
| 1615 | } |
Darren Tucker | 5dcdd21 | 2003-10-02 16:17:00 +1000 | [diff] [blame] | 1616 | static void |
| 1617 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) |
| 1618 | { |
| 1619 | Channel *c = NULL; |
| 1620 | int remote_id, sock; |
| 1621 | |
| 1622 | /* Read the remote channel number from the message. */ |
| 1623 | remote_id = packet_get_int(); |
| 1624 | packet_check_eom(); |
| 1625 | |
| 1626 | /* |
| 1627 | * Get a connection to the local authentication agent (this may again |
| 1628 | * get forwarded). |
| 1629 | */ |
| 1630 | sock = ssh_get_authentication_socket(); |
| 1631 | |
| 1632 | /* |
| 1633 | * If we could not connect the agent, send an error message back to |
| 1634 | * the server. This should never happen unless the agent dies, |
| 1635 | * because authentication forwarding is only enabled if we have an |
| 1636 | * agent. |
| 1637 | */ |
| 1638 | if (sock >= 0) { |
| 1639 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, |
| 1640 | -1, 0, 0, 0, "authentication agent connection", 1); |
| 1641 | c->remote_id = remote_id; |
| 1642 | c->force_drain = 1; |
| 1643 | } |
| 1644 | if (c == NULL) { |
| 1645 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); |
| 1646 | packet_put_int(remote_id); |
| 1647 | } else { |
| 1648 | /* Send a confirmation to the remote host. */ |
| 1649 | debug("Forwarding authentication connection."); |
| 1650 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); |
| 1651 | packet_put_int(remote_id); |
| 1652 | packet_put_int(c->self); |
| 1653 | } |
| 1654 | packet_send(); |
| 1655 | } |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1656 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1657 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1658 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
| 1659 | { |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1660 | Channel *c = NULL; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1661 | char *listen_address, *originator_address; |
| 1662 | int listen_port, originator_port; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1663 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1664 | |
| 1665 | /* Get rest of the packet */ |
| 1666 | listen_address = packet_get_string(NULL); |
| 1667 | listen_port = packet_get_int(); |
| 1668 | originator_address = packet_get_string(NULL); |
| 1669 | originator_port = packet_get_int(); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1670 | packet_check_eom(); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1671 | |
| 1672 | debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d", |
| 1673 | listen_address, listen_port, originator_address, originator_port); |
| 1674 | |
Ben Lindstrom | 173e646 | 2001-07-04 05:15:15 +0000 | [diff] [blame] | 1675 | sock = channel_connect_by_listen_address(listen_port); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1676 | if (sock < 0) { |
| 1677 | xfree(originator_address); |
| 1678 | xfree(listen_address); |
| 1679 | return NULL; |
| 1680 | } |
| 1681 | c = channel_new("forwarded-tcpip", |
| 1682 | SSH_CHANNEL_CONNECTING, sock, sock, -1, |
| 1683 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1684 | originator_address, 1); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1685 | xfree(originator_address); |
| 1686 | xfree(listen_address); |
| 1687 | return c; |
| 1688 | } |
| 1689 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1690 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1691 | client_request_x11(const char *request_type, int rchan) |
| 1692 | { |
| 1693 | Channel *c = NULL; |
| 1694 | char *originator; |
| 1695 | int originator_port; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1696 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1697 | |
| 1698 | if (!options.forward_x11) { |
| 1699 | error("Warning: ssh server tried X11 forwarding."); |
Damien Miller | 5eb137c | 2005-12-31 16:19:53 +1100 | [diff] [blame] | 1700 | 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] | 1701 | return NULL; |
| 1702 | } |
| 1703 | originator = packet_get_string(NULL); |
| 1704 | if (datafellows & SSH_BUG_X11FWD) { |
| 1705 | debug2("buggy server: x11 request w/o originator_port"); |
| 1706 | originator_port = 0; |
| 1707 | } else { |
| 1708 | originator_port = packet_get_int(); |
| 1709 | } |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1710 | packet_check_eom(); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1711 | /* XXX check permission */ |
Damien Miller | d83ff35 | 2001-01-30 09:19:34 +1100 | [diff] [blame] | 1712 | debug("client_request_x11: request from %s %d", originator, |
| 1713 | originator_port); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1714 | xfree(originator); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1715 | sock = x11_connect_display(); |
| 1716 | if (sock < 0) |
| 1717 | return NULL; |
| 1718 | c = channel_new("x11", |
| 1719 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1720 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
Ben Lindstrom | 944c4f0 | 2001-09-18 05:51:13 +0000 | [diff] [blame] | 1721 | c->force_drain = 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1722 | return c; |
| 1723 | } |
| 1724 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 1725 | static Channel * |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1726 | client_request_agent(const char *request_type, int rchan) |
| 1727 | { |
| 1728 | Channel *c = NULL; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1729 | int sock; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1730 | |
| 1731 | if (!options.forward_agent) { |
| 1732 | error("Warning: ssh server tried agent forwarding."); |
Damien Miller | 5eb137c | 2005-12-31 16:19:53 +1100 | [diff] [blame] | 1733 | 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] | 1734 | return NULL; |
| 1735 | } |
| 1736 | sock = ssh_get_authentication_socket(); |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1737 | if (sock < 0) |
| 1738 | return NULL; |
| 1739 | c = channel_new("authentication agent connection", |
| 1740 | SSH_CHANNEL_OPEN, sock, sock, -1, |
| 1741 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1742 | "authentication agent connection", 1); |
Ben Lindstrom | 944c4f0 | 2001-09-18 05:51:13 +0000 | [diff] [blame] | 1743 | c->force_drain = 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1744 | return c; |
| 1745 | } |
| 1746 | |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1747 | /* XXXX move to generic input handler */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1748 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1749 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1750 | { |
| 1751 | Channel *c = NULL; |
| 1752 | char *ctype; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1753 | int rchan; |
Ben Lindstrom | 4fed2be | 2002-06-25 23:17:36 +0000 | [diff] [blame] | 1754 | u_int rmaxpack, rwindow, len; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1755 | |
| 1756 | ctype = packet_get_string(&len); |
| 1757 | rchan = packet_get_int(); |
| 1758 | rwindow = packet_get_int(); |
| 1759 | rmaxpack = packet_get_int(); |
| 1760 | |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 1761 | 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] | 1762 | ctype, rchan, rwindow, rmaxpack); |
| 1763 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1764 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
| 1765 | c = client_request_forwarded_tcpip(ctype, rchan); |
| 1766 | } else if (strcmp(ctype, "x11") == 0) { |
| 1767 | c = client_request_x11(ctype, rchan); |
| 1768 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { |
| 1769 | c = client_request_agent(ctype, rchan); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1770 | } |
| 1771 | /* XXX duplicate : */ |
| 1772 | if (c != NULL) { |
| 1773 | debug("confirm %s", ctype); |
| 1774 | c->remote_id = rchan; |
| 1775 | c->remote_window = rwindow; |
| 1776 | c->remote_maxpacket = rmaxpack; |
Ben Lindstrom | a69d89b | 2001-05-09 00:01:18 +0000 | [diff] [blame] | 1777 | if (c->type != SSH_CHANNEL_CONNECTING) { |
| 1778 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); |
| 1779 | packet_put_int(c->remote_id); |
| 1780 | packet_put_int(c->self); |
| 1781 | packet_put_int(c->local_window); |
| 1782 | packet_put_int(c->local_maxpacket); |
| 1783 | packet_send(); |
| 1784 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1785 | } else { |
| 1786 | debug("failure %s", ctype); |
| 1787 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
| 1788 | packet_put_int(rchan); |
| 1789 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); |
Ben Lindstrom | f343674 | 2001-04-29 19:52:00 +0000 | [diff] [blame] | 1790 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
Ben Lindstrom | a69d89b | 2001-05-09 00:01:18 +0000 | [diff] [blame] | 1791 | packet_put_cstring("open failed"); |
Ben Lindstrom | f343674 | 2001-04-29 19:52:00 +0000 | [diff] [blame] | 1792 | packet_put_cstring(""); |
| 1793 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1794 | packet_send(); |
| 1795 | } |
| 1796 | xfree(ctype); |
| 1797 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1798 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 1799 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1800 | { |
| 1801 | Channel *c = NULL; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1802 | int exitval, id, reply, success = 0; |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1803 | char *rtype; |
| 1804 | |
| 1805 | id = packet_get_int(); |
| 1806 | rtype = packet_get_string(NULL); |
| 1807 | reply = packet_get_char(); |
| 1808 | |
| 1809 | debug("client_input_channel_req: channel %d rtype %s reply %d", |
| 1810 | id, rtype, reply); |
| 1811 | |
Damien Miller | 3bbd878 | 2004-06-18 22:23:22 +1000 | [diff] [blame] | 1812 | if (id == -1) { |
| 1813 | error("client_input_channel_req: request for channel -1"); |
| 1814 | } else if ((c = channel_lookup(id)) == NULL) { |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1815 | error("client_input_channel_req: channel %d: unknown channel", id); |
| 1816 | } else if (strcmp(rtype, "exit-status") == 0) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1817 | exitval = packet_get_int(); |
| 1818 | if (id == session_ident) { |
| 1819 | success = 1; |
| 1820 | exit_status = exitval; |
| 1821 | } else if (c->ctl_fd == -1) { |
| 1822 | error("client_input_channel_req: unexpected channel %d", |
| 1823 | session_ident); |
| 1824 | } else { |
| 1825 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); |
| 1826 | success = 1; |
| 1827 | } |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1828 | packet_check_eom(); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1829 | } |
| 1830 | if (reply) { |
| 1831 | packet_start(success ? |
| 1832 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); |
Damien Miller | 3bbd878 | 2004-06-18 22:23:22 +1000 | [diff] [blame] | 1833 | packet_put_int(id); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1834 | packet_send(); |
| 1835 | } |
| 1836 | xfree(rtype); |
| 1837 | } |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 1838 | static void |
| 1839 | client_input_global_request(int type, u_int32_t seq, void *ctxt) |
| 1840 | { |
| 1841 | char *rtype; |
| 1842 | int want_reply; |
| 1843 | int success = 0; |
| 1844 | |
| 1845 | rtype = packet_get_string(NULL); |
| 1846 | want_reply = packet_get_char(); |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 1847 | debug("client_input_global_request: rtype %s want_reply %d", |
| 1848 | rtype, want_reply); |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 1849 | if (want_reply) { |
| 1850 | packet_start(success ? |
| 1851 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); |
| 1852 | packet_send(); |
| 1853 | packet_write_wait(); |
| 1854 | } |
| 1855 | xfree(rtype); |
| 1856 | } |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1857 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1858 | void |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 1859 | client_session2_setup(int id, int want_tty, int want_subsystem, |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1860 | 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] | 1861 | dispatch_fn *subsys_repl) |
| 1862 | { |
| 1863 | int len; |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1864 | Channel *c = NULL; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1865 | |
| 1866 | debug2("%s: id %d", __func__, id); |
| 1867 | |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1868 | if ((c = channel_lookup(id)) == NULL) |
| 1869 | fatal("client_session2_setup: channel %d: unknown channel", id); |
| 1870 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1871 | if (want_tty) { |
| 1872 | struct winsize ws; |
| 1873 | struct termios tio; |
| 1874 | |
| 1875 | /* Store window size in the packet. */ |
| 1876 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) |
| 1877 | memset(&ws, 0, sizeof(ws)); |
| 1878 | |
| 1879 | channel_request_start(id, "pty-req", 0); |
| 1880 | packet_put_cstring(term != NULL ? term : ""); |
| 1881 | packet_put_int(ws.ws_col); |
| 1882 | packet_put_int(ws.ws_row); |
| 1883 | packet_put_int(ws.ws_xpixel); |
| 1884 | packet_put_int(ws.ws_ypixel); |
| 1885 | tio = get_saved_tio(); |
| 1886 | tty_make_modes(-1, tiop != NULL ? tiop : &tio); |
| 1887 | packet_send(); |
| 1888 | /* XXX wait for reply */ |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 1889 | c->client_tty = 1; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1890 | } |
| 1891 | |
| 1892 | /* Transfer any environment variables from client to server */ |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1893 | if (options.num_send_env != 0 && env != NULL) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1894 | int i, j, matched; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1895 | char *name, *val; |
| 1896 | |
| 1897 | debug("Sending environment."); |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1898 | for (i = 0; env[i] != NULL; i++) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1899 | /* Split */ |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1900 | name = xstrdup(env[i]); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1901 | if ((val = strchr(name, '=')) == NULL) { |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 1902 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1903 | continue; |
| 1904 | } |
| 1905 | *val++ = '\0'; |
| 1906 | |
| 1907 | matched = 0; |
| 1908 | for (j = 0; j < options.num_send_env; j++) { |
| 1909 | if (match_pattern(name, options.send_env[j])) { |
| 1910 | matched = 1; |
| 1911 | break; |
| 1912 | } |
| 1913 | } |
| 1914 | if (!matched) { |
| 1915 | debug3("Ignored env %s", name); |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 1916 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1917 | continue; |
| 1918 | } |
| 1919 | |
| 1920 | debug("Sending env %s = %s", name, val); |
| 1921 | channel_request_start(id, "env", 0); |
| 1922 | packet_put_cstring(name); |
| 1923 | packet_put_cstring(val); |
| 1924 | packet_send(); |
Damien Miller | 0a0176e | 2005-11-05 15:07:59 +1100 | [diff] [blame] | 1925 | xfree(name); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | len = buffer_len(cmd); |
| 1930 | if (len > 0) { |
| 1931 | if (len > 900) |
| 1932 | len = 900; |
| 1933 | if (want_subsystem) { |
| 1934 | debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd)); |
| 1935 | channel_request_start(id, "subsystem", subsys_repl != NULL); |
| 1936 | if (subsys_repl != NULL) { |
| 1937 | /* register callback for reply */ |
| 1938 | /* XXX we assume that client_loop has already been called */ |
| 1939 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl); |
| 1940 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl); |
| 1941 | } |
| 1942 | } else { |
| 1943 | debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd)); |
| 1944 | channel_request_start(id, "exec", 0); |
| 1945 | } |
| 1946 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); |
| 1947 | packet_send(); |
| 1948 | } else { |
| 1949 | channel_request_start(id, "shell", 0); |
| 1950 | packet_send(); |
| 1951 | } |
| 1952 | } |
| 1953 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1954 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1955 | client_init_dispatch_20(void) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1956 | { |
Ben Lindstrom | 8ac9106 | 2001-04-04 17:57:54 +0000 | [diff] [blame] | 1957 | dispatch_init(&dispatch_protocol_error); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1958 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1959 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
| 1960 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); |
| 1961 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); |
| 1962 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1963 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1964 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
| 1965 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
Ben Lindstrom | 5b82832 | 2001-02-09 01:34:36 +0000 | [diff] [blame] | 1966 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1967 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
Damien Miller | c3fa407 | 2002-01-22 23:21:58 +1100 | [diff] [blame] | 1968 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
Ben Lindstrom | 8ac9106 | 2001-04-04 17:57:54 +0000 | [diff] [blame] | 1969 | |
| 1970 | /* rekeying */ |
| 1971 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1972 | |
| 1973 | /* global request reply messages */ |
| 1974 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); |
| 1975 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1976 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1977 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1978 | client_init_dispatch_13(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1979 | { |
| 1980 | dispatch_init(NULL); |
| 1981 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); |
| 1982 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); |
| 1983 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1984 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
| 1985 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
| 1986 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1987 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
| 1988 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); |
| 1989 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 1990 | |
| 1991 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? |
Darren Tucker | 5dcdd21 | 2003-10-02 16:17:00 +1000 | [diff] [blame] | 1992 | &client_input_agent_open : &deny_input_open); |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 1993 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
| 1994 | &x11_input_open : &deny_input_open); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1995 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1996 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1997 | client_init_dispatch_15(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 1998 | { |
| 1999 | client_init_dispatch_13(); |
| 2000 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); |
| 2001 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); |
| 2002 | } |
Ben Lindstrom | db47f38 | 2001-07-04 05:10:27 +0000 | [diff] [blame] | 2003 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 2004 | client_init_dispatch(void) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2005 | { |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 2006 | if (compat20) |
| 2007 | client_init_dispatch_20(); |
| 2008 | else if (compat13) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 2009 | client_init_dispatch_13(); |
| 2010 | else |
| 2011 | client_init_dispatch_15(); |
| 2012 | } |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2013 | |
| 2014 | /* client specific fatal cleanup */ |
| 2015 | void |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 2016 | cleanup_exit(int i) |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2017 | { |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2018 | leave_raw_mode(); |
| 2019 | leave_non_blocking(); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 2020 | if (options.control_path != NULL && control_fd != -1) |
| 2021 | unlink(options.control_path); |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 2022 | _exit(i); |
Darren Tucker | 9a2c4cd | 2003-09-22 21:16:05 +1000 | [diff] [blame] | 2023 | } |