14a421b63SDag-Erling Smørgrav /* $OpenBSD: clientloop.c,v 1.231 2011/01/16 12:05:59 djm Exp $ */ 2*89986192SBrooks Davis /* $FreeBSD$ */ 3511b41d2SMark Murray /* 4511b41d2SMark Murray * Author: Tatu Ylonen <ylo@cs.hut.fi> 5511b41d2SMark Murray * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6511b41d2SMark Murray * All rights reserved 7511b41d2SMark Murray * The main loop for the interactive session (client side). 8511b41d2SMark Murray * 9b66f2d16SKris Kennaway * As far as I am concerned, the code I have written for this software 10b66f2d16SKris Kennaway * can be used freely for any purpose. Any derived versions of this 11b66f2d16SKris Kennaway * software must be clearly marked as such, and if the derived work is 12b66f2d16SKris Kennaway * incompatible with the protocol description in the RFC file, it must be 13b66f2d16SKris Kennaway * called by a name other than "ssh" or "Secure Shell". 14b66f2d16SKris Kennaway * 15b66f2d16SKris Kennaway * 16b66f2d16SKris Kennaway * Copyright (c) 1999 Theo de Raadt. All rights reserved. 17b66f2d16SKris Kennaway * 18b66f2d16SKris Kennaway * Redistribution and use in source and binary forms, with or without 19b66f2d16SKris Kennaway * modification, are permitted provided that the following conditions 20b66f2d16SKris Kennaway * are met: 21b66f2d16SKris Kennaway * 1. Redistributions of source code must retain the above copyright 22b66f2d16SKris Kennaway * notice, this list of conditions and the following disclaimer. 23b66f2d16SKris Kennaway * 2. Redistributions in binary form must reproduce the above copyright 24b66f2d16SKris Kennaway * notice, this list of conditions and the following disclaimer in the 25b66f2d16SKris Kennaway * documentation and/or other materials provided with the distribution. 26b66f2d16SKris Kennaway * 27b66f2d16SKris Kennaway * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28b66f2d16SKris Kennaway * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29b66f2d16SKris Kennaway * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30b66f2d16SKris Kennaway * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31b66f2d16SKris Kennaway * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32b66f2d16SKris Kennaway * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33b66f2d16SKris Kennaway * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34b66f2d16SKris Kennaway * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35b66f2d16SKris Kennaway * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36b66f2d16SKris Kennaway * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37b66f2d16SKris Kennaway * 38b66f2d16SKris Kennaway * 39a04a10f8SKris Kennaway * SSH2 support added by Markus Friedl. 40ae1f160dSDag-Erling Smørgrav * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. 41b66f2d16SKris Kennaway * 42b66f2d16SKris Kennaway * Redistribution and use in source and binary forms, with or without 43b66f2d16SKris Kennaway * modification, are permitted provided that the following conditions 44b66f2d16SKris Kennaway * are met: 45b66f2d16SKris Kennaway * 1. Redistributions of source code must retain the above copyright 46b66f2d16SKris Kennaway * notice, this list of conditions and the following disclaimer. 47b66f2d16SKris Kennaway * 2. Redistributions in binary form must reproduce the above copyright 48b66f2d16SKris Kennaway * notice, this list of conditions and the following disclaimer in the 49b66f2d16SKris Kennaway * documentation and/or other materials provided with the distribution. 50b66f2d16SKris Kennaway * 51b66f2d16SKris Kennaway * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 52b66f2d16SKris Kennaway * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53b66f2d16SKris Kennaway * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54b66f2d16SKris Kennaway * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 55b66f2d16SKris Kennaway * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 56b66f2d16SKris Kennaway * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 57b66f2d16SKris Kennaway * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 58b66f2d16SKris Kennaway * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 59b66f2d16SKris Kennaway * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 60b66f2d16SKris Kennaway * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61511b41d2SMark Murray */ 62511b41d2SMark Murray 63511b41d2SMark Murray #include "includes.h" 64511b41d2SMark Murray 65761efaa7SDag-Erling Smørgrav #include <sys/types.h> 66761efaa7SDag-Erling Smørgrav #include <sys/ioctl.h> 67761efaa7SDag-Erling Smørgrav #include <sys/param.h> 68761efaa7SDag-Erling Smørgrav #ifdef HAVE_SYS_STAT_H 69761efaa7SDag-Erling Smørgrav # include <sys/stat.h> 70761efaa7SDag-Erling Smørgrav #endif 71761efaa7SDag-Erling Smørgrav #ifdef HAVE_SYS_TIME_H 72761efaa7SDag-Erling Smørgrav # include <sys/time.h> 73761efaa7SDag-Erling Smørgrav #endif 74761efaa7SDag-Erling Smørgrav #include <sys/socket.h> 75761efaa7SDag-Erling Smørgrav 76761efaa7SDag-Erling Smørgrav #include <ctype.h> 77761efaa7SDag-Erling Smørgrav #include <errno.h> 78761efaa7SDag-Erling Smørgrav #ifdef HAVE_PATHS_H 79761efaa7SDag-Erling Smørgrav #include <paths.h> 80761efaa7SDag-Erling Smørgrav #endif 81761efaa7SDag-Erling Smørgrav #include <signal.h> 82761efaa7SDag-Erling Smørgrav #include <stdarg.h> 83761efaa7SDag-Erling Smørgrav #include <stdio.h> 84761efaa7SDag-Erling Smørgrav #include <stdlib.h> 85761efaa7SDag-Erling Smørgrav #include <string.h> 86761efaa7SDag-Erling Smørgrav #include <termios.h> 87761efaa7SDag-Erling Smørgrav #include <pwd.h> 88761efaa7SDag-Erling Smørgrav #include <unistd.h> 89761efaa7SDag-Erling Smørgrav 90d4af9e69SDag-Erling Smørgrav #include "openbsd-compat/sys-queue.h" 91761efaa7SDag-Erling Smørgrav #include "xmalloc.h" 92511b41d2SMark Murray #include "ssh.h" 931e8db6e2SBrian Feldman #include "ssh1.h" 941e8db6e2SBrian Feldman #include "ssh2.h" 95511b41d2SMark Murray #include "packet.h" 96511b41d2SMark Murray #include "buffer.h" 97a04a10f8SKris Kennaway #include "compat.h" 98a04a10f8SKris Kennaway #include "channels.h" 99a04a10f8SKris Kennaway #include "dispatch.h" 1001e8db6e2SBrian Feldman #include "key.h" 101761efaa7SDag-Erling Smørgrav #include "cipher.h" 1021e8db6e2SBrian Feldman #include "kex.h" 1031e8db6e2SBrian Feldman #include "log.h" 1041e8db6e2SBrian Feldman #include "readconf.h" 1051e8db6e2SBrian Feldman #include "clientloop.h" 106021d409fSDag-Erling Smørgrav #include "sshconnect.h" 1071e8db6e2SBrian Feldman #include "authfd.h" 1081e8db6e2SBrian Feldman #include "atomicio.h" 109d74d50a8SDag-Erling Smørgrav #include "sshpty.h" 1101e8db6e2SBrian Feldman #include "misc.h" 111d74d50a8SDag-Erling Smørgrav #include "match.h" 112d74d50a8SDag-Erling Smørgrav #include "msg.h" 1137aee6ffeSDag-Erling Smørgrav #include "roaming.h" 1145b9b2fafSBrian Feldman 1155b9b2fafSBrian Feldman /* import options */ 1164899dde7SBrian Feldman extern Options options; 1174899dde7SBrian Feldman 118511b41d2SMark Murray /* Flag indicating that stdin should be redirected from /dev/null. */ 119511b41d2SMark Murray extern int stdin_null_flag; 120511b41d2SMark Murray 121efcad6b7SDag-Erling Smørgrav /* Flag indicating that no shell has been requested */ 122efcad6b7SDag-Erling Smørgrav extern int no_shell_flag; 123efcad6b7SDag-Erling Smørgrav 124d74d50a8SDag-Erling Smørgrav /* Control socket */ 125b15c8340SDag-Erling Smørgrav extern int muxserver_sock; /* XXX use mux_client_cleanup() instead */ 126d74d50a8SDag-Erling Smørgrav 127511b41d2SMark Murray /* 128511b41d2SMark Murray * Name of the host we are connecting to. This is the name given on the 129511b41d2SMark Murray * command line, or the HostName specified for the user-supplied name in a 130511b41d2SMark Murray * configuration file. 131511b41d2SMark Murray */ 132511b41d2SMark Murray extern char *host; 133511b41d2SMark Murray 134b15c8340SDag-Erling Smørgrav /* Force TTY allocation */ 135b15c8340SDag-Erling Smørgrav extern int force_tty_flag; 136b15c8340SDag-Erling Smørgrav 137511b41d2SMark Murray /* 138511b41d2SMark Murray * Flag to indicate that we have received a window change signal which has 139511b41d2SMark Murray * not yet been processed. This will cause a message indicating the new 140511b41d2SMark Murray * window size to be sent to the server a little later. This is volatile 141511b41d2SMark Murray * because this is updated in a signal handler. 142511b41d2SMark Murray */ 143ae1f160dSDag-Erling Smørgrav static volatile sig_atomic_t received_window_change_signal = 0; 144ae1f160dSDag-Erling Smørgrav static volatile sig_atomic_t received_signal = 0; 145511b41d2SMark Murray 146021d409fSDag-Erling Smørgrav /* Flag indicating whether the user's terminal is in non-blocking mode. */ 147511b41d2SMark Murray static int in_non_blocking_mode = 0; 148511b41d2SMark Murray 149e2f6069cSDag-Erling Smørgrav /* Time when backgrounded control master using ControlPersist should exit */ 150e2f6069cSDag-Erling Smørgrav static time_t control_persist_exit_time = 0; 151e2f6069cSDag-Erling Smørgrav 152511b41d2SMark Murray /* Common data for the client loop code. */ 153b15c8340SDag-Erling Smørgrav volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */ 154d4af9e69SDag-Erling Smørgrav static int escape_char1; /* Escape character. (proto1 only) */ 155d4af9e69SDag-Erling Smørgrav static int escape_pending1; /* Last character was an escape (proto1 only) */ 156511b41d2SMark Murray static int last_was_cr; /* Last character was a newline. */ 157d4af9e69SDag-Erling Smørgrav static int exit_status; /* Used to store the command exit status. */ 158d4af9e69SDag-Erling Smørgrav static int stdin_eof; /* EOF has been encountered on stderr. */ 159511b41d2SMark Murray static Buffer stdin_buffer; /* Buffer for stdin data. */ 160511b41d2SMark Murray static Buffer stdout_buffer; /* Buffer for stdout data. */ 161511b41d2SMark Murray static Buffer stderr_buffer; /* Buffer for stderr data. */ 1621e8db6e2SBrian Feldman static u_int buffer_high; /* Soft max buffer size. */ 163511b41d2SMark Murray static int connection_in; /* Connection to server (input). */ 164511b41d2SMark Murray static int connection_out; /* Connection to server (output). */ 1651e8db6e2SBrian Feldman static int need_rekeying; /* Set to non-zero if rekeying is requested. */ 166e2f6069cSDag-Erling Smørgrav static int session_closed; /* In SSH2: login session closed. */ 167e2f6069cSDag-Erling Smørgrav static int x11_refuse_time; /* If >0, refuse x11 opens after this time. */ 168a04a10f8SKris Kennaway 169ae1f160dSDag-Erling Smørgrav static void client_init_dispatch(void); 170a04a10f8SKris Kennaway int session_ident = -1; 171a04a10f8SKris Kennaway 172b15c8340SDag-Erling Smørgrav int session_resumed = 0; 173b15c8340SDag-Erling Smørgrav 174d4af9e69SDag-Erling Smørgrav /* Track escape per proto2 channel */ 175d4af9e69SDag-Erling Smørgrav struct escape_filter_ctx { 176d4af9e69SDag-Erling Smørgrav int escape_pending; 177d4af9e69SDag-Erling Smørgrav int escape_char; 178d74d50a8SDag-Erling Smørgrav }; 179d74d50a8SDag-Erling Smørgrav 180d4af9e69SDag-Erling Smørgrav /* Context for channel confirmation replies */ 181d4af9e69SDag-Erling Smørgrav struct channel_reply_ctx { 182d4af9e69SDag-Erling Smørgrav const char *request_type; 183d4af9e69SDag-Erling Smørgrav int id, do_close; 184d4af9e69SDag-Erling Smørgrav }; 185d4af9e69SDag-Erling Smørgrav 186d4af9e69SDag-Erling Smørgrav /* Global request success/failure callbacks */ 187d4af9e69SDag-Erling Smørgrav struct global_confirm { 188d4af9e69SDag-Erling Smørgrav TAILQ_ENTRY(global_confirm) entry; 189d4af9e69SDag-Erling Smørgrav global_confirm_cb *cb; 190d4af9e69SDag-Erling Smørgrav void *ctx; 191d4af9e69SDag-Erling Smørgrav int ref_count; 192d4af9e69SDag-Erling Smørgrav }; 193d4af9e69SDag-Erling Smørgrav TAILQ_HEAD(global_confirms, global_confirm); 194d4af9e69SDag-Erling Smørgrav static struct global_confirms global_confirms = 195d4af9e69SDag-Erling Smørgrav TAILQ_HEAD_INITIALIZER(global_confirms); 196d4af9e69SDag-Erling Smørgrav 1971e8db6e2SBrian Feldman /*XXX*/ 1981e8db6e2SBrian Feldman extern Kex *xxx_kex; 199511b41d2SMark Murray 200d74d50a8SDag-Erling Smørgrav void ssh_process_session2_setup(int, int, int, Buffer *); 201d74d50a8SDag-Erling Smørgrav 202511b41d2SMark Murray /* Restores stdin to blocking mode. */ 203511b41d2SMark Murray 204ae1f160dSDag-Erling Smørgrav static void 2051e8db6e2SBrian Feldman leave_non_blocking(void) 206511b41d2SMark Murray { 207511b41d2SMark Murray if (in_non_blocking_mode) { 208d74d50a8SDag-Erling Smørgrav unset_nonblock(fileno(stdin)); 209511b41d2SMark Murray in_non_blocking_mode = 0; 210511b41d2SMark Murray } 211511b41d2SMark Murray } 212511b41d2SMark Murray 213511b41d2SMark Murray /* Puts stdin terminal in non-blocking mode. */ 214511b41d2SMark Murray 215ae1f160dSDag-Erling Smørgrav static void 2161e8db6e2SBrian Feldman enter_non_blocking(void) 217511b41d2SMark Murray { 218511b41d2SMark Murray in_non_blocking_mode = 1; 219d74d50a8SDag-Erling Smørgrav set_nonblock(fileno(stdin)); 220511b41d2SMark Murray } 221511b41d2SMark Murray 222511b41d2SMark Murray /* 223511b41d2SMark Murray * Signal handler for the window change signal (SIGWINCH). This just sets a 224511b41d2SMark Murray * flag indicating that the window has changed. 225511b41d2SMark Murray */ 226761efaa7SDag-Erling Smørgrav /*ARGSUSED */ 227ae1f160dSDag-Erling Smørgrav static void 228511b41d2SMark Murray window_change_handler(int sig) 229511b41d2SMark Murray { 230511b41d2SMark Murray received_window_change_signal = 1; 231511b41d2SMark Murray signal(SIGWINCH, window_change_handler); 232511b41d2SMark Murray } 233511b41d2SMark Murray 234511b41d2SMark Murray /* 235511b41d2SMark Murray * Signal handler for signals that cause the program to terminate. These 236511b41d2SMark Murray * signals must be trapped to restore terminal modes. 237511b41d2SMark Murray */ 238761efaa7SDag-Erling Smørgrav /*ARGSUSED */ 239ae1f160dSDag-Erling Smørgrav static void 240511b41d2SMark Murray signal_handler(int sig) 241511b41d2SMark Murray { 242ae1f160dSDag-Erling Smørgrav received_signal = sig; 243ae1f160dSDag-Erling Smørgrav quit_pending = 1; 244511b41d2SMark Murray } 245511b41d2SMark Murray 246511b41d2SMark Murray /* 247511b41d2SMark Murray * Returns current time in seconds from Jan 1, 1970 with the maximum 248511b41d2SMark Murray * available resolution. 249511b41d2SMark Murray */ 250511b41d2SMark Murray 251ae1f160dSDag-Erling Smørgrav static double 2521e8db6e2SBrian Feldman get_current_time(void) 253511b41d2SMark Murray { 254511b41d2SMark Murray struct timeval tv; 255511b41d2SMark Murray gettimeofday(&tv, NULL); 256511b41d2SMark Murray return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; 257511b41d2SMark Murray } 258511b41d2SMark Murray 259e2f6069cSDag-Erling Smørgrav /* 260e2f6069cSDag-Erling Smørgrav * Sets control_persist_exit_time to the absolute time when the 261e2f6069cSDag-Erling Smørgrav * backgrounded control master should exit due to expiry of the 262e2f6069cSDag-Erling Smørgrav * ControlPersist timeout. Sets it to 0 if we are not a backgrounded 263e2f6069cSDag-Erling Smørgrav * control master process, or if there is no ControlPersist timeout. 264e2f6069cSDag-Erling Smørgrav */ 265e2f6069cSDag-Erling Smørgrav static void 266e2f6069cSDag-Erling Smørgrav set_control_persist_exit_time(void) 267e2f6069cSDag-Erling Smørgrav { 268e2f6069cSDag-Erling Smørgrav if (muxserver_sock == -1 || !options.control_persist 269e2f6069cSDag-Erling Smørgrav || options.control_persist_timeout == 0) 270e2f6069cSDag-Erling Smørgrav /* not using a ControlPersist timeout */ 271e2f6069cSDag-Erling Smørgrav control_persist_exit_time = 0; 272e2f6069cSDag-Erling Smørgrav else if (channel_still_open()) { 273e2f6069cSDag-Erling Smørgrav /* some client connections are still open */ 274e2f6069cSDag-Erling Smørgrav if (control_persist_exit_time > 0) 275e2f6069cSDag-Erling Smørgrav debug2("%s: cancel scheduled exit", __func__); 276e2f6069cSDag-Erling Smørgrav control_persist_exit_time = 0; 277e2f6069cSDag-Erling Smørgrav } else if (control_persist_exit_time <= 0) { 278e2f6069cSDag-Erling Smørgrav /* a client connection has recently closed */ 279e2f6069cSDag-Erling Smørgrav control_persist_exit_time = time(NULL) + 280e2f6069cSDag-Erling Smørgrav (time_t)options.control_persist_timeout; 281e2f6069cSDag-Erling Smørgrav debug2("%s: schedule exit in %d seconds", __func__, 282e2f6069cSDag-Erling Smørgrav options.control_persist_timeout); 283e2f6069cSDag-Erling Smørgrav } 284e2f6069cSDag-Erling Smørgrav /* else we are already counting down to the timeout */ 285e2f6069cSDag-Erling Smørgrav } 286e2f6069cSDag-Erling Smørgrav 287043840dfSDag-Erling Smørgrav #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" 288043840dfSDag-Erling Smørgrav void 289043840dfSDag-Erling Smørgrav client_x11_get_proto(const char *display, const char *xauth_path, 290e2f6069cSDag-Erling Smørgrav u_int trusted, u_int timeout, char **_proto, char **_data) 291043840dfSDag-Erling Smørgrav { 292043840dfSDag-Erling Smørgrav char cmd[1024]; 293043840dfSDag-Erling Smørgrav char line[512]; 294043840dfSDag-Erling Smørgrav char xdisplay[512]; 295043840dfSDag-Erling Smørgrav static char proto[512], data[512]; 296043840dfSDag-Erling Smørgrav FILE *f; 297043840dfSDag-Erling Smørgrav int got_data = 0, generated = 0, do_unlink = 0, i; 298043840dfSDag-Erling Smørgrav char *xauthdir, *xauthfile; 299043840dfSDag-Erling Smørgrav struct stat st; 300e2f6069cSDag-Erling Smørgrav u_int now; 301043840dfSDag-Erling Smørgrav 302043840dfSDag-Erling Smørgrav xauthdir = xauthfile = NULL; 303043840dfSDag-Erling Smørgrav *_proto = proto; 304043840dfSDag-Erling Smørgrav *_data = data; 305043840dfSDag-Erling Smørgrav proto[0] = data[0] = '\0'; 306043840dfSDag-Erling Smørgrav 307043840dfSDag-Erling Smørgrav if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { 308043840dfSDag-Erling Smørgrav debug("No xauth program."); 309043840dfSDag-Erling Smørgrav } else { 310043840dfSDag-Erling Smørgrav if (display == NULL) { 311043840dfSDag-Erling Smørgrav debug("x11_get_proto: DISPLAY not set"); 312043840dfSDag-Erling Smørgrav return; 313043840dfSDag-Erling Smørgrav } 314043840dfSDag-Erling Smørgrav /* 315043840dfSDag-Erling Smørgrav * Handle FamilyLocal case where $DISPLAY does 316043840dfSDag-Erling Smørgrav * not match an authorization entry. For this we 317043840dfSDag-Erling Smørgrav * just try "xauth list unix:displaynum.screennum". 318043840dfSDag-Erling Smørgrav * XXX: "localhost" match to determine FamilyLocal 319043840dfSDag-Erling Smørgrav * is not perfect. 320043840dfSDag-Erling Smørgrav */ 321043840dfSDag-Erling Smørgrav if (strncmp(display, "localhost:", 10) == 0) { 322043840dfSDag-Erling Smørgrav snprintf(xdisplay, sizeof(xdisplay), "unix:%s", 323043840dfSDag-Erling Smørgrav display + 10); 324043840dfSDag-Erling Smørgrav display = xdisplay; 325043840dfSDag-Erling Smørgrav } 326043840dfSDag-Erling Smørgrav if (trusted == 0) { 327043840dfSDag-Erling Smørgrav xauthdir = xmalloc(MAXPATHLEN); 328043840dfSDag-Erling Smørgrav xauthfile = xmalloc(MAXPATHLEN); 3294a421b63SDag-Erling Smørgrav mktemp_proto(xauthdir, MAXPATHLEN); 330043840dfSDag-Erling Smørgrav if (mkdtemp(xauthdir) != NULL) { 331043840dfSDag-Erling Smørgrav do_unlink = 1; 332043840dfSDag-Erling Smørgrav snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", 333043840dfSDag-Erling Smørgrav xauthdir); 334043840dfSDag-Erling Smørgrav snprintf(cmd, sizeof(cmd), 335043840dfSDag-Erling Smørgrav "%s -f %s generate %s " SSH_X11_PROTO 336e2f6069cSDag-Erling Smørgrav " untrusted timeout %u 2>" _PATH_DEVNULL, 337e2f6069cSDag-Erling Smørgrav xauth_path, xauthfile, display, timeout); 338043840dfSDag-Erling Smørgrav debug2("x11_get_proto: %s", cmd); 339043840dfSDag-Erling Smørgrav if (system(cmd) == 0) 340043840dfSDag-Erling Smørgrav generated = 1; 341e2f6069cSDag-Erling Smørgrav if (x11_refuse_time == 0) { 342e2f6069cSDag-Erling Smørgrav now = time(NULL) + 1; 343e2f6069cSDag-Erling Smørgrav if (UINT_MAX - timeout < now) 344e2f6069cSDag-Erling Smørgrav x11_refuse_time = UINT_MAX; 345e2f6069cSDag-Erling Smørgrav else 346e2f6069cSDag-Erling Smørgrav x11_refuse_time = now + timeout; 347e2f6069cSDag-Erling Smørgrav } 348043840dfSDag-Erling Smørgrav } 349043840dfSDag-Erling Smørgrav } 350d4af9e69SDag-Erling Smørgrav 351d4af9e69SDag-Erling Smørgrav /* 352d4af9e69SDag-Erling Smørgrav * When in untrusted mode, we read the cookie only if it was 353d4af9e69SDag-Erling Smørgrav * successfully generated as an untrusted one in the step 354d4af9e69SDag-Erling Smørgrav * above. 355d4af9e69SDag-Erling Smørgrav */ 356d4af9e69SDag-Erling Smørgrav if (trusted || generated) { 357043840dfSDag-Erling Smørgrav snprintf(cmd, sizeof(cmd), 358021d409fSDag-Erling Smørgrav "%s %s%s list %s 2>" _PATH_DEVNULL, 359043840dfSDag-Erling Smørgrav xauth_path, 360043840dfSDag-Erling Smørgrav generated ? "-f " : "" , 361043840dfSDag-Erling Smørgrav generated ? xauthfile : "", 362043840dfSDag-Erling Smørgrav display); 363043840dfSDag-Erling Smørgrav debug2("x11_get_proto: %s", cmd); 364043840dfSDag-Erling Smørgrav f = popen(cmd, "r"); 365043840dfSDag-Erling Smørgrav if (f && fgets(line, sizeof(line), f) && 366043840dfSDag-Erling Smørgrav sscanf(line, "%*s %511s %511s", proto, data) == 2) 367043840dfSDag-Erling Smørgrav got_data = 1; 368043840dfSDag-Erling Smørgrav if (f) 369043840dfSDag-Erling Smørgrav pclose(f); 370d4af9e69SDag-Erling Smørgrav } else 371d4af9e69SDag-Erling Smørgrav error("Warning: untrusted X11 forwarding setup failed: " 372d4af9e69SDag-Erling Smørgrav "xauth key data not generated"); 373043840dfSDag-Erling Smørgrav } 374043840dfSDag-Erling Smørgrav 375043840dfSDag-Erling Smørgrav if (do_unlink) { 376043840dfSDag-Erling Smørgrav unlink(xauthfile); 377043840dfSDag-Erling Smørgrav rmdir(xauthdir); 378043840dfSDag-Erling Smørgrav } 379043840dfSDag-Erling Smørgrav if (xauthdir) 380043840dfSDag-Erling Smørgrav xfree(xauthdir); 381043840dfSDag-Erling Smørgrav if (xauthfile) 382043840dfSDag-Erling Smørgrav xfree(xauthfile); 383043840dfSDag-Erling Smørgrav 384043840dfSDag-Erling Smørgrav /* 385043840dfSDag-Erling Smørgrav * If we didn't get authentication data, just make up some 386043840dfSDag-Erling Smørgrav * data. The forwarding code will check the validity of the 387043840dfSDag-Erling Smørgrav * response anyway, and substitute this data. The X11 388043840dfSDag-Erling Smørgrav * server, however, will ignore this fake data and use 389043840dfSDag-Erling Smørgrav * whatever authentication mechanisms it was using otherwise 390043840dfSDag-Erling Smørgrav * for the local connection. 391043840dfSDag-Erling Smørgrav */ 392043840dfSDag-Erling Smørgrav if (!got_data) { 393043840dfSDag-Erling Smørgrav u_int32_t rnd = 0; 394043840dfSDag-Erling Smørgrav 395043840dfSDag-Erling Smørgrav logit("Warning: No xauth data; " 396043840dfSDag-Erling Smørgrav "using fake authentication data for X11 forwarding."); 397043840dfSDag-Erling Smørgrav strlcpy(proto, SSH_X11_PROTO, sizeof proto); 398043840dfSDag-Erling Smørgrav for (i = 0; i < 16; i++) { 399043840dfSDag-Erling Smørgrav if (i % 4 == 0) 400043840dfSDag-Erling Smørgrav rnd = arc4random(); 401043840dfSDag-Erling Smørgrav snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", 402043840dfSDag-Erling Smørgrav rnd & 0xff); 403043840dfSDag-Erling Smørgrav rnd >>= 8; 404043840dfSDag-Erling Smørgrav } 405043840dfSDag-Erling Smørgrav } 406043840dfSDag-Erling Smørgrav } 407043840dfSDag-Erling Smørgrav 408511b41d2SMark Murray /* 409511b41d2SMark Murray * This is called when the interactive is entered. This checks if there is 410511b41d2SMark Murray * an EOF coming on stdin. We must check this explicitly, as select() does 411511b41d2SMark Murray * not appear to wake up when redirecting from /dev/null. 412511b41d2SMark Murray */ 413511b41d2SMark Murray 414ae1f160dSDag-Erling Smørgrav static void 4151e8db6e2SBrian Feldman client_check_initial_eof_on_stdin(void) 416511b41d2SMark Murray { 417511b41d2SMark Murray int len; 418511b41d2SMark Murray char buf[1]; 419511b41d2SMark Murray 420511b41d2SMark Murray /* 421511b41d2SMark Murray * If standard input is to be "redirected from /dev/null", we simply 422511b41d2SMark Murray * mark that we have seen an EOF and send an EOF message to the 423511b41d2SMark Murray * server. Otherwise, we try to read a single character; it appears 424511b41d2SMark Murray * that for some files, such /dev/null, select() never wakes up for 425511b41d2SMark Murray * read for this descriptor, which means that we never get EOF. This 426511b41d2SMark Murray * way we will get the EOF if stdin comes from /dev/null or similar. 427511b41d2SMark Murray */ 428511b41d2SMark Murray if (stdin_null_flag) { 429511b41d2SMark Murray /* Fake EOF on stdin. */ 430511b41d2SMark Murray debug("Sending eof."); 431511b41d2SMark Murray stdin_eof = 1; 432511b41d2SMark Murray packet_start(SSH_CMSG_EOF); 433511b41d2SMark Murray packet_send(); 434511b41d2SMark Murray } else { 435511b41d2SMark Murray enter_non_blocking(); 436511b41d2SMark Murray 437511b41d2SMark Murray /* Check for immediate EOF on stdin. */ 438511b41d2SMark Murray len = read(fileno(stdin), buf, 1); 439511b41d2SMark Murray if (len == 0) { 440d4af9e69SDag-Erling Smørgrav /* 441d4af9e69SDag-Erling Smørgrav * EOF. Record that we have seen it and send 442d4af9e69SDag-Erling Smørgrav * EOF to server. 443d4af9e69SDag-Erling Smørgrav */ 444511b41d2SMark Murray debug("Sending eof."); 445511b41d2SMark Murray stdin_eof = 1; 446511b41d2SMark Murray packet_start(SSH_CMSG_EOF); 447511b41d2SMark Murray packet_send(); 448511b41d2SMark Murray } else if (len > 0) { 449511b41d2SMark Murray /* 450511b41d2SMark Murray * Got data. We must store the data in the buffer, 451511b41d2SMark Murray * and also process it as an escape character if 452511b41d2SMark Murray * appropriate. 453511b41d2SMark Murray */ 454d4af9e69SDag-Erling Smørgrav if ((u_char) buf[0] == escape_char1) 455d4af9e69SDag-Erling Smørgrav escape_pending1 = 1; 4561e8db6e2SBrian Feldman else 457511b41d2SMark Murray buffer_append(&stdin_buffer, buf, 1); 458511b41d2SMark Murray } 459511b41d2SMark Murray leave_non_blocking(); 460511b41d2SMark Murray } 461511b41d2SMark Murray } 462511b41d2SMark Murray 463511b41d2SMark Murray 464511b41d2SMark Murray /* 465511b41d2SMark Murray * Make packets from buffered stdin data, and buffer them for sending to the 466511b41d2SMark Murray * connection. 467511b41d2SMark Murray */ 468511b41d2SMark Murray 469ae1f160dSDag-Erling Smørgrav static void 4701e8db6e2SBrian Feldman client_make_packets_from_stdin_data(void) 471511b41d2SMark Murray { 4721e8db6e2SBrian Feldman u_int len; 473511b41d2SMark Murray 474511b41d2SMark Murray /* Send buffered stdin data to the server. */ 475511b41d2SMark Murray while (buffer_len(&stdin_buffer) > 0 && 476511b41d2SMark Murray packet_not_very_much_data_to_write()) { 477511b41d2SMark Murray len = buffer_len(&stdin_buffer); 478511b41d2SMark Murray /* Keep the packets at reasonable size. */ 479511b41d2SMark Murray if (len > packet_get_maxsize()) 480511b41d2SMark Murray len = packet_get_maxsize(); 481511b41d2SMark Murray packet_start(SSH_CMSG_STDIN_DATA); 482511b41d2SMark Murray packet_put_string(buffer_ptr(&stdin_buffer), len); 483511b41d2SMark Murray packet_send(); 484511b41d2SMark Murray buffer_consume(&stdin_buffer, len); 485511b41d2SMark Murray /* If we have a pending EOF, send it now. */ 486511b41d2SMark Murray if (stdin_eof && buffer_len(&stdin_buffer) == 0) { 487511b41d2SMark Murray packet_start(SSH_CMSG_EOF); 488511b41d2SMark Murray packet_send(); 489511b41d2SMark Murray } 490511b41d2SMark Murray } 491511b41d2SMark Murray } 492511b41d2SMark Murray 493511b41d2SMark Murray /* 494511b41d2SMark Murray * Checks if the client window has changed, and sends a packet about it to 495511b41d2SMark Murray * the server if so. The actual change is detected elsewhere (by a software 496511b41d2SMark Murray * interrupt on Unix); this just checks the flag and sends a message if 497511b41d2SMark Murray * appropriate. 498511b41d2SMark Murray */ 499511b41d2SMark Murray 500ae1f160dSDag-Erling Smørgrav static void 5011e8db6e2SBrian Feldman client_check_window_change(void) 502511b41d2SMark Murray { 503511b41d2SMark Murray struct winsize ws; 504511b41d2SMark Murray 505a04a10f8SKris Kennaway if (! received_window_change_signal) 506a04a10f8SKris Kennaway return; 507a04a10f8SKris Kennaway /** XXX race */ 508511b41d2SMark Murray received_window_change_signal = 0; 509511b41d2SMark Murray 5105b9b2fafSBrian Feldman debug2("client_check_window_change: changed"); 511a04a10f8SKris Kennaway 512a04a10f8SKris Kennaway if (compat20) { 513d74d50a8SDag-Erling Smørgrav channel_send_window_changes(); 514a04a10f8SKris Kennaway } else { 515d74d50a8SDag-Erling Smørgrav if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) 516d74d50a8SDag-Erling Smørgrav return; 517511b41d2SMark Murray packet_start(SSH_CMSG_WINDOW_SIZE); 518761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_row); 519761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_col); 520761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_xpixel); 521761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_ypixel); 522511b41d2SMark Murray packet_send(); 523511b41d2SMark Murray } 524511b41d2SMark Murray } 525511b41d2SMark Murray 526efcad6b7SDag-Erling Smørgrav static void 527efcad6b7SDag-Erling Smørgrav client_global_request_reply(int type, u_int32_t seq, void *ctxt) 528efcad6b7SDag-Erling Smørgrav { 529d4af9e69SDag-Erling Smørgrav struct global_confirm *gc; 530d4af9e69SDag-Erling Smørgrav 531d4af9e69SDag-Erling Smørgrav if ((gc = TAILQ_FIRST(&global_confirms)) == NULL) 532d4af9e69SDag-Erling Smørgrav return; 533d4af9e69SDag-Erling Smørgrav if (gc->cb != NULL) 534d4af9e69SDag-Erling Smørgrav gc->cb(type, seq, gc->ctx); 535d4af9e69SDag-Erling Smørgrav if (--gc->ref_count <= 0) { 536d4af9e69SDag-Erling Smørgrav TAILQ_REMOVE(&global_confirms, gc, entry); 537d4af9e69SDag-Erling Smørgrav bzero(gc, sizeof(*gc)); 538d4af9e69SDag-Erling Smørgrav xfree(gc); 539d4af9e69SDag-Erling Smørgrav } 540d4af9e69SDag-Erling Smørgrav 5417aee6ffeSDag-Erling Smørgrav packet_set_alive_timeouts(0); 542efcad6b7SDag-Erling Smørgrav } 543efcad6b7SDag-Erling Smørgrav 544efcad6b7SDag-Erling Smørgrav static void 545efcad6b7SDag-Erling Smørgrav server_alive_check(void) 546efcad6b7SDag-Erling Smørgrav { 5477aee6ffeSDag-Erling Smørgrav if (packet_inc_alive_timeouts() > options.server_alive_count_max) { 5484a421b63SDag-Erling Smørgrav logit("Timeout, server %s not responding.", host); 54992eb0aa1SDag-Erling Smørgrav cleanup_exit(255); 55092eb0aa1SDag-Erling Smørgrav } 551efcad6b7SDag-Erling Smørgrav packet_start(SSH2_MSG_GLOBAL_REQUEST); 552efcad6b7SDag-Erling Smørgrav packet_put_cstring("keepalive@openssh.com"); 553efcad6b7SDag-Erling Smørgrav packet_put_char(1); /* boolean: want reply */ 554efcad6b7SDag-Erling Smørgrav packet_send(); 555d4af9e69SDag-Erling Smørgrav /* Insert an empty placeholder to maintain ordering */ 556d4af9e69SDag-Erling Smørgrav client_register_global_confirm(NULL, NULL); 557efcad6b7SDag-Erling Smørgrav } 558efcad6b7SDag-Erling Smørgrav 559511b41d2SMark Murray /* 560511b41d2SMark Murray * Waits until the client can do something (some data becomes available on 561511b41d2SMark Murray * one of the file descriptors). 562511b41d2SMark Murray */ 563ae1f160dSDag-Erling Smørgrav static void 5641e8db6e2SBrian Feldman client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, 565d74d50a8SDag-Erling Smørgrav int *maxfdp, u_int *nallocp, int rekeying) 566511b41d2SMark Murray { 567efcad6b7SDag-Erling Smørgrav struct timeval tv, *tvp; 568e2f6069cSDag-Erling Smørgrav int timeout_secs; 569efcad6b7SDag-Erling Smørgrav int ret; 570efcad6b7SDag-Erling Smørgrav 5711e8db6e2SBrian Feldman /* Add any selections by the channel mechanism. */ 572ae1f160dSDag-Erling Smørgrav channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); 573511b41d2SMark Murray 574a04a10f8SKris Kennaway if (!compat20) { 575511b41d2SMark Murray /* Read from the connection, unless our buffers are full. */ 576511b41d2SMark Murray if (buffer_len(&stdout_buffer) < buffer_high && 577511b41d2SMark Murray buffer_len(&stderr_buffer) < buffer_high && 578511b41d2SMark Murray channel_not_very_much_buffered_data()) 5791e8db6e2SBrian Feldman FD_SET(connection_in, *readsetp); 580511b41d2SMark Murray /* 581511b41d2SMark Murray * Read from stdin, unless we have seen EOF or have very much 582511b41d2SMark Murray * buffered data to send to the server. 583511b41d2SMark Murray */ 584511b41d2SMark Murray if (!stdin_eof && packet_not_very_much_data_to_write()) 5851e8db6e2SBrian Feldman FD_SET(fileno(stdin), *readsetp); 586511b41d2SMark Murray 587a04a10f8SKris Kennaway /* Select stdout/stderr if have data in buffer. */ 588a04a10f8SKris Kennaway if (buffer_len(&stdout_buffer) > 0) 5891e8db6e2SBrian Feldman FD_SET(fileno(stdout), *writesetp); 590a04a10f8SKris Kennaway if (buffer_len(&stderr_buffer) > 0) 5911e8db6e2SBrian Feldman FD_SET(fileno(stderr), *writesetp); 592a04a10f8SKris Kennaway } else { 593ae1f160dSDag-Erling Smørgrav /* channel_prepare_select could have closed the last channel */ 594ae1f160dSDag-Erling Smørgrav if (session_closed && !channel_still_open() && 595ae1f160dSDag-Erling Smørgrav !packet_have_data_to_write()) { 596ae1f160dSDag-Erling Smørgrav /* clear mask since we did not call select() */ 597ae1f160dSDag-Erling Smørgrav memset(*readsetp, 0, *nallocp); 598ae1f160dSDag-Erling Smørgrav memset(*writesetp, 0, *nallocp); 599ae1f160dSDag-Erling Smørgrav return; 600ae1f160dSDag-Erling Smørgrav } else { 6011e8db6e2SBrian Feldman FD_SET(connection_in, *readsetp); 602a04a10f8SKris Kennaway } 603ae1f160dSDag-Erling Smørgrav } 604511b41d2SMark Murray 605511b41d2SMark Murray /* Select server connection if have data to write to the server. */ 606511b41d2SMark Murray if (packet_have_data_to_write()) 6071e8db6e2SBrian Feldman FD_SET(connection_out, *writesetp); 608511b41d2SMark Murray 609511b41d2SMark Murray /* 610511b41d2SMark Murray * Wait for something to happen. This will suspend the process until 611511b41d2SMark Murray * some selected descriptor can be read, written, or has some other 612e2f6069cSDag-Erling Smørgrav * event pending, or a timeout expires. 613511b41d2SMark Murray */ 614511b41d2SMark Murray 615e2f6069cSDag-Erling Smørgrav timeout_secs = INT_MAX; /* we use INT_MAX to mean no timeout */ 616e2f6069cSDag-Erling Smørgrav if (options.server_alive_interval > 0 && compat20) 617e2f6069cSDag-Erling Smørgrav timeout_secs = options.server_alive_interval; 618e2f6069cSDag-Erling Smørgrav set_control_persist_exit_time(); 619e2f6069cSDag-Erling Smørgrav if (control_persist_exit_time > 0) { 620e2f6069cSDag-Erling Smørgrav timeout_secs = MIN(timeout_secs, 621e2f6069cSDag-Erling Smørgrav control_persist_exit_time - time(NULL)); 622e2f6069cSDag-Erling Smørgrav if (timeout_secs < 0) 623e2f6069cSDag-Erling Smørgrav timeout_secs = 0; 624e2f6069cSDag-Erling Smørgrav } 625e2f6069cSDag-Erling Smørgrav if (timeout_secs == INT_MAX) 626efcad6b7SDag-Erling Smørgrav tvp = NULL; 627efcad6b7SDag-Erling Smørgrav else { 628e2f6069cSDag-Erling Smørgrav tv.tv_sec = timeout_secs; 629efcad6b7SDag-Erling Smørgrav tv.tv_usec = 0; 630efcad6b7SDag-Erling Smørgrav tvp = &tv; 631efcad6b7SDag-Erling Smørgrav } 632e2f6069cSDag-Erling Smørgrav 633efcad6b7SDag-Erling Smørgrav ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); 634efcad6b7SDag-Erling Smørgrav if (ret < 0) { 635511b41d2SMark Murray char buf[100]; 6361e8db6e2SBrian Feldman 6371e8db6e2SBrian Feldman /* 6381e8db6e2SBrian Feldman * We have to clear the select masks, because we return. 6391e8db6e2SBrian Feldman * We have to return, because the mainloop checks for the flags 6401e8db6e2SBrian Feldman * set by the signal handlers. 6411e8db6e2SBrian Feldman */ 642ae1f160dSDag-Erling Smørgrav memset(*readsetp, 0, *nallocp); 643ae1f160dSDag-Erling Smørgrav memset(*writesetp, 0, *nallocp); 6441e8db6e2SBrian Feldman 645511b41d2SMark Murray if (errno == EINTR) 646511b41d2SMark Murray return; 647511b41d2SMark Murray /* Note: we might still have data in the buffers. */ 648511b41d2SMark Murray snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); 649511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 650511b41d2SMark Murray quit_pending = 1; 651efcad6b7SDag-Erling Smørgrav } else if (ret == 0) 652efcad6b7SDag-Erling Smørgrav server_alive_check(); 653511b41d2SMark Murray } 654511b41d2SMark Murray 655ae1f160dSDag-Erling Smørgrav static void 656b66f2d16SKris Kennaway client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) 657511b41d2SMark Murray { 658511b41d2SMark Murray /* Flush stdout and stderr buffers. */ 659b66f2d16SKris Kennaway if (buffer_len(bout) > 0) 660d4af9e69SDag-Erling Smørgrav atomicio(vwrite, fileno(stdout), buffer_ptr(bout), 661d4af9e69SDag-Erling Smørgrav buffer_len(bout)); 662b66f2d16SKris Kennaway if (buffer_len(berr) > 0) 663d4af9e69SDag-Erling Smørgrav atomicio(vwrite, fileno(stderr), buffer_ptr(berr), 664d4af9e69SDag-Erling Smørgrav buffer_len(berr)); 665511b41d2SMark Murray 666b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 667511b41d2SMark Murray 668511b41d2SMark Murray /* 669511b41d2SMark Murray * Free (and clear) the buffer to reduce the amount of data that gets 670511b41d2SMark Murray * written to swap. 671511b41d2SMark Murray */ 672b66f2d16SKris Kennaway buffer_free(bin); 673b66f2d16SKris Kennaway buffer_free(bout); 674b66f2d16SKris Kennaway buffer_free(berr); 675511b41d2SMark Murray 676511b41d2SMark Murray /* Send the suspend signal to the program itself. */ 677511b41d2SMark Murray kill(getpid(), SIGTSTP); 678511b41d2SMark Murray 6795e8dbd04SDag-Erling Smørgrav /* Reset window sizes in case they have changed */ 680511b41d2SMark Murray received_window_change_signal = 1; 681511b41d2SMark Murray 682511b41d2SMark Murray /* OK, we have been continued by the user. Reinitialize buffers. */ 683b66f2d16SKris Kennaway buffer_init(bin); 684b66f2d16SKris Kennaway buffer_init(bout); 685b66f2d16SKris Kennaway buffer_init(berr); 686511b41d2SMark Murray 687b15c8340SDag-Erling Smørgrav enter_raw_mode(force_tty_flag); 688511b41d2SMark Murray } 689511b41d2SMark Murray 690ae1f160dSDag-Erling Smørgrav static void 691a04a10f8SKris Kennaway client_process_net_input(fd_set *readset) 692511b41d2SMark Murray { 6937aee6ffeSDag-Erling Smørgrav int len, cont = 0; 6947aee6ffeSDag-Erling Smørgrav char buf[SSH_IOBUFSZ]; 695511b41d2SMark Murray 696511b41d2SMark Murray /* 697511b41d2SMark Murray * Read input from the server, and add any such data to the buffer of 698511b41d2SMark Murray * the packet subsystem. 699511b41d2SMark Murray */ 700511b41d2SMark Murray if (FD_ISSET(connection_in, readset)) { 701511b41d2SMark Murray /* Read as much as possible. */ 7027aee6ffeSDag-Erling Smørgrav len = roaming_read(connection_in, buf, sizeof(buf), &cont); 7037aee6ffeSDag-Erling Smørgrav if (len == 0 && cont == 0) { 704d4af9e69SDag-Erling Smørgrav /* 705d4af9e69SDag-Erling Smørgrav * Received EOF. The remote host has closed the 706d4af9e69SDag-Erling Smørgrav * connection. 707d4af9e69SDag-Erling Smørgrav */ 708d4af9e69SDag-Erling Smørgrav snprintf(buf, sizeof buf, 709d4af9e69SDag-Erling Smørgrav "Connection to %.300s closed by remote host.\r\n", 710511b41d2SMark Murray host); 711511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 712511b41d2SMark Murray quit_pending = 1; 713511b41d2SMark Murray return; 714511b41d2SMark Murray } 715511b41d2SMark Murray /* 716511b41d2SMark Murray * There is a kernel bug on Solaris that causes select to 717511b41d2SMark Murray * sometimes wake up even though there is no data available. 718511b41d2SMark Murray */ 719d4af9e69SDag-Erling Smørgrav if (len < 0 && 720d4af9e69SDag-Erling Smørgrav (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) 721511b41d2SMark Murray len = 0; 722511b41d2SMark Murray 723511b41d2SMark Murray if (len < 0) { 724d4af9e69SDag-Erling Smørgrav /* 725d4af9e69SDag-Erling Smørgrav * An error has encountered. Perhaps there is a 726d4af9e69SDag-Erling Smørgrav * network problem. 727d4af9e69SDag-Erling Smørgrav */ 728d4af9e69SDag-Erling Smørgrav snprintf(buf, sizeof buf, 729d4af9e69SDag-Erling Smørgrav "Read from remote host %.300s: %.100s\r\n", 730511b41d2SMark Murray host, strerror(errno)); 731511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 732511b41d2SMark Murray quit_pending = 1; 733511b41d2SMark Murray return; 734511b41d2SMark Murray } 735511b41d2SMark Murray packet_process_incoming(buf, len); 736511b41d2SMark Murray } 737a04a10f8SKris Kennaway } 738a04a10f8SKris Kennaway 739545d5ecaSDag-Erling Smørgrav static void 740d4af9e69SDag-Erling Smørgrav client_status_confirm(int type, Channel *c, void *ctx) 741d74d50a8SDag-Erling Smørgrav { 742d4af9e69SDag-Erling Smørgrav struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx; 743d4af9e69SDag-Erling Smørgrav char errmsg[256]; 744d4af9e69SDag-Erling Smørgrav int tochan; 745d74d50a8SDag-Erling Smørgrav 746d4af9e69SDag-Erling Smørgrav /* XXX supress on mux _client_ quietmode */ 747d4af9e69SDag-Erling Smørgrav tochan = options.log_level >= SYSLOG_LEVEL_ERROR && 748b15c8340SDag-Erling Smørgrav c->ctl_chan != -1 && c->extended_usage == CHAN_EXTENDED_WRITE; 749d74d50a8SDag-Erling Smørgrav 750d4af9e69SDag-Erling Smørgrav if (type == SSH2_MSG_CHANNEL_SUCCESS) { 751d4af9e69SDag-Erling Smørgrav debug2("%s request accepted on channel %d", 752d4af9e69SDag-Erling Smørgrav cr->request_type, c->self); 753d4af9e69SDag-Erling Smørgrav } else if (type == SSH2_MSG_CHANNEL_FAILURE) { 754d4af9e69SDag-Erling Smørgrav if (tochan) { 755d4af9e69SDag-Erling Smørgrav snprintf(errmsg, sizeof(errmsg), 756d4af9e69SDag-Erling Smørgrav "%s request failed\r\n", cr->request_type); 757d4af9e69SDag-Erling Smørgrav } else { 758d4af9e69SDag-Erling Smørgrav snprintf(errmsg, sizeof(errmsg), 759d4af9e69SDag-Erling Smørgrav "%s request failed on channel %d", 760d4af9e69SDag-Erling Smørgrav cr->request_type, c->self); 761d74d50a8SDag-Erling Smørgrav } 762d4af9e69SDag-Erling Smørgrav /* If error occurred on primary session channel, then exit */ 763d4af9e69SDag-Erling Smørgrav if (cr->do_close && c->self == session_ident) 764d4af9e69SDag-Erling Smørgrav fatal("%s", errmsg); 765d4af9e69SDag-Erling Smørgrav /* If error occurred on mux client, append to their stderr */ 766d4af9e69SDag-Erling Smørgrav if (tochan) 767d4af9e69SDag-Erling Smørgrav buffer_append(&c->extended, errmsg, strlen(errmsg)); 768d4af9e69SDag-Erling Smørgrav else 769d4af9e69SDag-Erling Smørgrav error("%s", errmsg); 770d4af9e69SDag-Erling Smørgrav if (cr->do_close) { 771d4af9e69SDag-Erling Smørgrav chan_read_failed(c); 772d4af9e69SDag-Erling Smørgrav chan_write_failed(c); 773d74d50a8SDag-Erling Smørgrav } 774d74d50a8SDag-Erling Smørgrav } 775d4af9e69SDag-Erling Smørgrav xfree(cr); 776d4af9e69SDag-Erling Smørgrav } 777d74d50a8SDag-Erling Smørgrav 778d74d50a8SDag-Erling Smørgrav static void 779d4af9e69SDag-Erling Smørgrav client_abandon_status_confirm(Channel *c, void *ctx) 780d74d50a8SDag-Erling Smørgrav { 781d4af9e69SDag-Erling Smørgrav xfree(ctx); 782d74d50a8SDag-Erling Smørgrav } 783d74d50a8SDag-Erling Smørgrav 784d74d50a8SDag-Erling Smørgrav static void 785d4af9e69SDag-Erling Smørgrav client_expect_confirm(int id, const char *request, int do_close) 786d74d50a8SDag-Erling Smørgrav { 787d4af9e69SDag-Erling Smørgrav struct channel_reply_ctx *cr = xmalloc(sizeof(*cr)); 788d74d50a8SDag-Erling Smørgrav 789d4af9e69SDag-Erling Smørgrav cr->request_type = request; 790d4af9e69SDag-Erling Smørgrav cr->do_close = do_close; 791d74d50a8SDag-Erling Smørgrav 792d4af9e69SDag-Erling Smørgrav channel_register_status_confirm(id, client_status_confirm, 793d4af9e69SDag-Erling Smørgrav client_abandon_status_confirm, cr); 794d4af9e69SDag-Erling Smørgrav } 795d4af9e69SDag-Erling Smørgrav 796d4af9e69SDag-Erling Smørgrav void 797d4af9e69SDag-Erling Smørgrav client_register_global_confirm(global_confirm_cb *cb, void *ctx) 798d4af9e69SDag-Erling Smørgrav { 799d4af9e69SDag-Erling Smørgrav struct global_confirm *gc, *last_gc; 800d4af9e69SDag-Erling Smørgrav 801d4af9e69SDag-Erling Smørgrav /* Coalesce identical callbacks */ 802d4af9e69SDag-Erling Smørgrav last_gc = TAILQ_LAST(&global_confirms, global_confirms); 803d4af9e69SDag-Erling Smørgrav if (last_gc && last_gc->cb == cb && last_gc->ctx == ctx) { 804d4af9e69SDag-Erling Smørgrav if (++last_gc->ref_count >= INT_MAX) 805d4af9e69SDag-Erling Smørgrav fatal("%s: last_gc->ref_count = %d", 806d4af9e69SDag-Erling Smørgrav __func__, last_gc->ref_count); 807d74d50a8SDag-Erling Smørgrav return; 808d74d50a8SDag-Erling Smørgrav } 809d74d50a8SDag-Erling Smørgrav 810d4af9e69SDag-Erling Smørgrav gc = xmalloc(sizeof(*gc)); 811d4af9e69SDag-Erling Smørgrav gc->cb = cb; 812d4af9e69SDag-Erling Smørgrav gc->ctx = ctx; 813d4af9e69SDag-Erling Smørgrav gc->ref_count = 1; 814d4af9e69SDag-Erling Smørgrav TAILQ_INSERT_TAIL(&global_confirms, gc, entry); 815d74d50a8SDag-Erling Smørgrav } 816d74d50a8SDag-Erling Smørgrav 817d74d50a8SDag-Erling Smørgrav static void 818545d5ecaSDag-Erling Smørgrav process_cmdline(void) 819545d5ecaSDag-Erling Smørgrav { 820545d5ecaSDag-Erling Smørgrav void (*handler)(int); 8215e8dbd04SDag-Erling Smørgrav char *s, *cmd, *cancel_host; 822d74d50a8SDag-Erling Smørgrav int delete = 0; 823cce7d346SDag-Erling Smørgrav int local = 0, remote = 0, dynamic = 0; 824cce7d346SDag-Erling Smørgrav int cancel_port; 8255e8dbd04SDag-Erling Smørgrav Forward fwd; 826545d5ecaSDag-Erling Smørgrav 827d4af9e69SDag-Erling Smørgrav bzero(&fwd, sizeof(fwd)); 828d4af9e69SDag-Erling Smørgrav fwd.listen_host = fwd.connect_host = NULL; 829d4af9e69SDag-Erling Smørgrav 830b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 831545d5ecaSDag-Erling Smørgrav handler = signal(SIGINT, SIG_IGN); 832545d5ecaSDag-Erling Smørgrav cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); 833545d5ecaSDag-Erling Smørgrav if (s == NULL) 834545d5ecaSDag-Erling Smørgrav goto out; 835d4af9e69SDag-Erling Smørgrav while (isspace(*s)) 836545d5ecaSDag-Erling Smørgrav s++; 837d74d50a8SDag-Erling Smørgrav if (*s == '-') 838d74d50a8SDag-Erling Smørgrav s++; /* Skip cmdline '-', if any */ 839d74d50a8SDag-Erling Smørgrav if (*s == '\0') 840545d5ecaSDag-Erling Smørgrav goto out; 841d74d50a8SDag-Erling Smørgrav 842d74d50a8SDag-Erling Smørgrav if (*s == 'h' || *s == 'H' || *s == '?') { 843d74d50a8SDag-Erling Smørgrav logit("Commands:"); 844761efaa7SDag-Erling Smørgrav logit(" -L[bind_address:]port:host:hostport " 845761efaa7SDag-Erling Smørgrav "Request local forward"); 846761efaa7SDag-Erling Smørgrav logit(" -R[bind_address:]port:host:hostport " 847761efaa7SDag-Erling Smørgrav "Request remote forward"); 848cce7d346SDag-Erling Smørgrav logit(" -D[bind_address:]port " 849cce7d346SDag-Erling Smørgrav "Request dynamic forward"); 850761efaa7SDag-Erling Smørgrav logit(" -KR[bind_address:]port " 851761efaa7SDag-Erling Smørgrav "Cancel remote forward"); 852021d409fSDag-Erling Smørgrav if (!options.permit_local_command) 853021d409fSDag-Erling Smørgrav goto out; 854761efaa7SDag-Erling Smørgrav logit(" !args " 855761efaa7SDag-Erling Smørgrav "Execute local command"); 856021d409fSDag-Erling Smørgrav goto out; 857021d409fSDag-Erling Smørgrav } 858021d409fSDag-Erling Smørgrav 859021d409fSDag-Erling Smørgrav if (*s == '!' && options.permit_local_command) { 860021d409fSDag-Erling Smørgrav s++; 861021d409fSDag-Erling Smørgrav ssh_local_cmd(s); 862d74d50a8SDag-Erling Smørgrav goto out; 863d74d50a8SDag-Erling Smørgrav } 864d74d50a8SDag-Erling Smørgrav 865d74d50a8SDag-Erling Smørgrav if (*s == 'K') { 866d74d50a8SDag-Erling Smørgrav delete = 1; 867d74d50a8SDag-Erling Smørgrav s++; 868d74d50a8SDag-Erling Smørgrav } 869cce7d346SDag-Erling Smørgrav if (*s == 'L') 870cce7d346SDag-Erling Smørgrav local = 1; 871cce7d346SDag-Erling Smørgrav else if (*s == 'R') 872cce7d346SDag-Erling Smørgrav remote = 1; 873cce7d346SDag-Erling Smørgrav else if (*s == 'D') 874cce7d346SDag-Erling Smørgrav dynamic = 1; 875cce7d346SDag-Erling Smørgrav else { 876d95e11bfSDag-Erling Smørgrav logit("Invalid command."); 877545d5ecaSDag-Erling Smørgrav goto out; 878545d5ecaSDag-Erling Smørgrav } 879cce7d346SDag-Erling Smørgrav 880cce7d346SDag-Erling Smørgrav if ((local || dynamic) && delete) { 881d74d50a8SDag-Erling Smørgrav logit("Not supported."); 882d74d50a8SDag-Erling Smørgrav goto out; 883d74d50a8SDag-Erling Smørgrav } 884cce7d346SDag-Erling Smørgrav if (remote && delete && !compat20) { 885d95e11bfSDag-Erling Smørgrav logit("Not supported for SSH protocol version 1."); 886545d5ecaSDag-Erling Smørgrav goto out; 887545d5ecaSDag-Erling Smørgrav } 888d74d50a8SDag-Erling Smørgrav 889d4af9e69SDag-Erling Smørgrav while (isspace(*++s)) 890d4af9e69SDag-Erling Smørgrav ; 891545d5ecaSDag-Erling Smørgrav 892b15c8340SDag-Erling Smørgrav /* XXX update list of forwards in options */ 893d74d50a8SDag-Erling Smørgrav if (delete) { 8945e8dbd04SDag-Erling Smørgrav cancel_port = 0; 8955e8dbd04SDag-Erling Smørgrav cancel_host = hpdelim(&s); /* may be NULL */ 8965e8dbd04SDag-Erling Smørgrav if (s != NULL) { 8975e8dbd04SDag-Erling Smørgrav cancel_port = a2port(s); 8985e8dbd04SDag-Erling Smørgrav cancel_host = cleanhostname(cancel_host); 899d74d50a8SDag-Erling Smørgrav } else { 9005e8dbd04SDag-Erling Smørgrav cancel_port = a2port(cancel_host); 9015e8dbd04SDag-Erling Smørgrav cancel_host = NULL; 9025e8dbd04SDag-Erling Smørgrav } 903cce7d346SDag-Erling Smørgrav if (cancel_port <= 0) { 9045e8dbd04SDag-Erling Smørgrav logit("Bad forwarding close port"); 905545d5ecaSDag-Erling Smørgrav goto out; 906545d5ecaSDag-Erling Smørgrav } 9075e8dbd04SDag-Erling Smørgrav channel_request_rforward_cancel(cancel_host, cancel_port); 9085e8dbd04SDag-Erling Smørgrav } else { 909cce7d346SDag-Erling Smørgrav if (!parse_forward(&fwd, s, dynamic, remote)) { 9105e8dbd04SDag-Erling Smørgrav logit("Bad forwarding specification."); 911545d5ecaSDag-Erling Smørgrav goto out; 912545d5ecaSDag-Erling Smørgrav } 913cce7d346SDag-Erling Smørgrav if (local || dynamic) { 9145e8dbd04SDag-Erling Smørgrav if (channel_setup_local_fwd_listener(fwd.listen_host, 9155e8dbd04SDag-Erling Smørgrav fwd.listen_port, fwd.connect_host, 9165e8dbd04SDag-Erling Smørgrav fwd.connect_port, options.gateway_ports) < 0) { 917d95e11bfSDag-Erling Smørgrav logit("Port forwarding failed."); 918545d5ecaSDag-Erling Smørgrav goto out; 919545d5ecaSDag-Erling Smørgrav } 9205e8dbd04SDag-Erling Smørgrav } else { 921761efaa7SDag-Erling Smørgrav if (channel_request_remote_forwarding(fwd.listen_host, 9225e8dbd04SDag-Erling Smørgrav fwd.listen_port, fwd.connect_host, 923761efaa7SDag-Erling Smørgrav fwd.connect_port) < 0) { 924761efaa7SDag-Erling Smørgrav logit("Port forwarding failed."); 925761efaa7SDag-Erling Smørgrav goto out; 926761efaa7SDag-Erling Smørgrav } 9275e8dbd04SDag-Erling Smørgrav } 9285e8dbd04SDag-Erling Smørgrav 929d95e11bfSDag-Erling Smørgrav logit("Forwarding port."); 930d74d50a8SDag-Erling Smørgrav } 931d74d50a8SDag-Erling Smørgrav 932545d5ecaSDag-Erling Smørgrav out: 933545d5ecaSDag-Erling Smørgrav signal(SIGINT, handler); 934b15c8340SDag-Erling Smørgrav enter_raw_mode(force_tty_flag); 935545d5ecaSDag-Erling Smørgrav if (cmd) 936545d5ecaSDag-Erling Smørgrav xfree(cmd); 937d4af9e69SDag-Erling Smørgrav if (fwd.listen_host != NULL) 938d4af9e69SDag-Erling Smørgrav xfree(fwd.listen_host); 939d4af9e69SDag-Erling Smørgrav if (fwd.connect_host != NULL) 940d4af9e69SDag-Erling Smørgrav xfree(fwd.connect_host); 941545d5ecaSDag-Erling Smørgrav } 942545d5ecaSDag-Erling Smørgrav 943d4af9e69SDag-Erling Smørgrav /* 944d4af9e69SDag-Erling Smørgrav * Process the characters one by one, call with c==NULL for proto1 case. 945d4af9e69SDag-Erling Smørgrav */ 946ae1f160dSDag-Erling Smørgrav static int 947d4af9e69SDag-Erling Smørgrav process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, 948d4af9e69SDag-Erling Smørgrav char *buf, int len) 949b66f2d16SKris Kennaway { 950b66f2d16SKris Kennaway char string[1024]; 951b66f2d16SKris Kennaway pid_t pid; 952b66f2d16SKris Kennaway int bytes = 0; 9531e8db6e2SBrian Feldman u_int i; 9541e8db6e2SBrian Feldman u_char ch; 955b66f2d16SKris Kennaway char *s; 956d4af9e69SDag-Erling Smørgrav int *escape_pendingp, escape_char; 957d4af9e69SDag-Erling Smørgrav struct escape_filter_ctx *efc; 958d4af9e69SDag-Erling Smørgrav 959d4af9e69SDag-Erling Smørgrav if (c == NULL) { 960d4af9e69SDag-Erling Smørgrav escape_pendingp = &escape_pending1; 961d4af9e69SDag-Erling Smørgrav escape_char = escape_char1; 962d4af9e69SDag-Erling Smørgrav } else { 963d4af9e69SDag-Erling Smørgrav if (c->filter_ctx == NULL) 964d4af9e69SDag-Erling Smørgrav return 0; 965d4af9e69SDag-Erling Smørgrav efc = (struct escape_filter_ctx *)c->filter_ctx; 966d4af9e69SDag-Erling Smørgrav escape_pendingp = &efc->escape_pending; 967d4af9e69SDag-Erling Smørgrav escape_char = efc->escape_char; 968d4af9e69SDag-Erling Smørgrav } 969b66f2d16SKris Kennaway 970043840dfSDag-Erling Smørgrav if (len <= 0) 971043840dfSDag-Erling Smørgrav return (0); 972043840dfSDag-Erling Smørgrav 973043840dfSDag-Erling Smørgrav for (i = 0; i < (u_int)len; i++) { 974b66f2d16SKris Kennaway /* Get one character at a time. */ 975b66f2d16SKris Kennaway ch = buf[i]; 976b66f2d16SKris Kennaway 977d4af9e69SDag-Erling Smørgrav if (*escape_pendingp) { 978b66f2d16SKris Kennaway /* We have previously seen an escape character. */ 979b66f2d16SKris Kennaway /* Clear the flag now. */ 980d4af9e69SDag-Erling Smørgrav *escape_pendingp = 0; 981b66f2d16SKris Kennaway 982b66f2d16SKris Kennaway /* Process the escaped character. */ 983b66f2d16SKris Kennaway switch (ch) { 984b66f2d16SKris Kennaway case '.': 985b66f2d16SKris Kennaway /* Terminate the connection. */ 986d4af9e69SDag-Erling Smørgrav snprintf(string, sizeof string, "%c.\r\n", 987d4af9e69SDag-Erling Smørgrav escape_char); 988b66f2d16SKris Kennaway buffer_append(berr, string, strlen(string)); 989b66f2d16SKris Kennaway 990b15c8340SDag-Erling Smørgrav if (c && c->ctl_chan != -1) { 991d4af9e69SDag-Erling Smørgrav chan_read_failed(c); 992d4af9e69SDag-Erling Smørgrav chan_write_failed(c); 993d4af9e69SDag-Erling Smørgrav return 0; 994d4af9e69SDag-Erling Smørgrav } else 995b66f2d16SKris Kennaway quit_pending = 1; 996b66f2d16SKris Kennaway return -1; 997b66f2d16SKris Kennaway 998b66f2d16SKris Kennaway case 'Z' - 64: 999d4af9e69SDag-Erling Smørgrav /* XXX support this for mux clients */ 1000b15c8340SDag-Erling Smørgrav if (c && c->ctl_chan != -1) { 1001d4af9e69SDag-Erling Smørgrav noescape: 1002d4af9e69SDag-Erling Smørgrav snprintf(string, sizeof string, 1003d4af9e69SDag-Erling Smørgrav "%c%c escape not available to " 1004d4af9e69SDag-Erling Smørgrav "multiplexed sessions\r\n", 1005d4af9e69SDag-Erling Smørgrav escape_char, ch); 1006d4af9e69SDag-Erling Smørgrav buffer_append(berr, string, 1007d4af9e69SDag-Erling Smørgrav strlen(string)); 1008d4af9e69SDag-Erling Smørgrav continue; 1009d4af9e69SDag-Erling Smørgrav } 1010d4af9e69SDag-Erling Smørgrav /* Suspend the program. Inform the user */ 1011d4af9e69SDag-Erling Smørgrav snprintf(string, sizeof string, 1012d4af9e69SDag-Erling Smørgrav "%c^Z [suspend ssh]\r\n", escape_char); 1013b66f2d16SKris Kennaway buffer_append(berr, string, strlen(string)); 1014b66f2d16SKris Kennaway 1015b66f2d16SKris Kennaway /* Restore terminal modes and suspend. */ 1016b66f2d16SKris Kennaway client_suspend_self(bin, bout, berr); 1017b66f2d16SKris Kennaway 1018b66f2d16SKris Kennaway /* We have been continued. */ 1019b66f2d16SKris Kennaway continue; 1020b66f2d16SKris Kennaway 1021d95e11bfSDag-Erling Smørgrav case 'B': 1022d95e11bfSDag-Erling Smørgrav if (compat20) { 1023d95e11bfSDag-Erling Smørgrav snprintf(string, sizeof string, 1024d95e11bfSDag-Erling Smørgrav "%cB\r\n", escape_char); 1025d95e11bfSDag-Erling Smørgrav buffer_append(berr, string, 1026d95e11bfSDag-Erling Smørgrav strlen(string)); 1027d95e11bfSDag-Erling Smørgrav channel_request_start(session_ident, 1028d95e11bfSDag-Erling Smørgrav "break", 0); 1029d95e11bfSDag-Erling Smørgrav packet_put_int(1000); 1030d95e11bfSDag-Erling Smørgrav packet_send(); 1031d95e11bfSDag-Erling Smørgrav } 1032d95e11bfSDag-Erling Smørgrav continue; 1033d95e11bfSDag-Erling Smørgrav 10341e8db6e2SBrian Feldman case 'R': 10351e8db6e2SBrian Feldman if (compat20) { 10361e8db6e2SBrian Feldman if (datafellows & SSH_BUG_NOREKEY) 1037d4af9e69SDag-Erling Smørgrav logit("Server does not " 1038d4af9e69SDag-Erling Smørgrav "support re-keying"); 10391e8db6e2SBrian Feldman else 10401e8db6e2SBrian Feldman need_rekeying = 1; 10411e8db6e2SBrian Feldman } 10421e8db6e2SBrian Feldman continue; 10431e8db6e2SBrian Feldman 1044b66f2d16SKris Kennaway case '&': 1045b15c8340SDag-Erling Smørgrav if (c && c->ctl_chan != -1) 1046d4af9e69SDag-Erling Smørgrav goto noescape; 1047b66f2d16SKris Kennaway /* 1048d4af9e69SDag-Erling Smørgrav * Detach the program (continue to serve 1049d4af9e69SDag-Erling Smørgrav * connections, but put in background and no 1050d4af9e69SDag-Erling Smørgrav * more new connections). 1051b66f2d16SKris Kennaway */ 1052ae1f160dSDag-Erling Smørgrav /* Restore tty modes. */ 1053b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 1054ae1f160dSDag-Erling Smørgrav 1055ae1f160dSDag-Erling Smørgrav /* Stop listening for new connections. */ 1056ae1f160dSDag-Erling Smørgrav channel_stop_listening(); 1057ae1f160dSDag-Erling Smørgrav 1058ae1f160dSDag-Erling Smørgrav snprintf(string, sizeof string, 1059ae1f160dSDag-Erling Smørgrav "%c& [backgrounded]\n", escape_char); 1060ae1f160dSDag-Erling Smørgrav buffer_append(berr, string, strlen(string)); 1061ae1f160dSDag-Erling Smørgrav 1062ae1f160dSDag-Erling Smørgrav /* Fork into background. */ 1063ae1f160dSDag-Erling Smørgrav pid = fork(); 1064ae1f160dSDag-Erling Smørgrav if (pid < 0) { 1065ae1f160dSDag-Erling Smørgrav error("fork: %.100s", strerror(errno)); 1066ae1f160dSDag-Erling Smørgrav continue; 1067ae1f160dSDag-Erling Smørgrav } 1068ae1f160dSDag-Erling Smørgrav if (pid != 0) { /* This is the parent. */ 1069ae1f160dSDag-Erling Smørgrav /* The parent just exits. */ 1070ae1f160dSDag-Erling Smørgrav exit(0); 1071ae1f160dSDag-Erling Smørgrav } 1072ae1f160dSDag-Erling Smørgrav /* The child continues serving connections. */ 1073ae1f160dSDag-Erling Smørgrav if (compat20) { 1074ae1f160dSDag-Erling Smørgrav buffer_append(bin, "\004", 1); 1075ae1f160dSDag-Erling Smørgrav /* fake EOF on stdin */ 1076ae1f160dSDag-Erling Smørgrav return -1; 1077ae1f160dSDag-Erling Smørgrav } else if (!stdin_eof) { 1078b66f2d16SKris Kennaway /* 1079d4af9e69SDag-Erling Smørgrav * Sending SSH_CMSG_EOF alone does not 1080d4af9e69SDag-Erling Smørgrav * always appear to be enough. So we 1081d4af9e69SDag-Erling Smørgrav * try to send an EOF character first. 1082b66f2d16SKris Kennaway */ 1083b66f2d16SKris Kennaway packet_start(SSH_CMSG_STDIN_DATA); 1084b66f2d16SKris Kennaway packet_put_string("\004", 1); 1085b66f2d16SKris Kennaway packet_send(); 1086b66f2d16SKris Kennaway /* Close stdin. */ 1087b66f2d16SKris Kennaway stdin_eof = 1; 1088b66f2d16SKris Kennaway if (buffer_len(bin) == 0) { 1089b66f2d16SKris Kennaway packet_start(SSH_CMSG_EOF); 1090b66f2d16SKris Kennaway packet_send(); 1091b66f2d16SKris Kennaway } 1092b66f2d16SKris Kennaway } 1093b66f2d16SKris Kennaway continue; 1094b66f2d16SKris Kennaway 1095b66f2d16SKris Kennaway case '?': 1096b15c8340SDag-Erling Smørgrav if (c && c->ctl_chan != -1) { 1097b66f2d16SKris Kennaway snprintf(string, sizeof string, 1098b66f2d16SKris Kennaway "%c?\r\n\ 1099b66f2d16SKris Kennaway Supported escape sequences:\r\n\ 1100d4af9e69SDag-Erling Smørgrav %c. - terminate session\r\n\ 1101d4af9e69SDag-Erling Smørgrav %cB - send a BREAK to the remote system\r\n\ 1102d4af9e69SDag-Erling Smørgrav %cR - Request rekey (SSH protocol 2 only)\r\n\ 1103d4af9e69SDag-Erling Smørgrav %c# - list forwarded connections\r\n\ 1104d4af9e69SDag-Erling Smørgrav %c? - this message\r\n\ 1105d4af9e69SDag-Erling Smørgrav %c%c - send the escape character by typing it twice\r\n\ 1106d4af9e69SDag-Erling Smørgrav (Note that escapes are only recognized immediately after newline.)\r\n", 1107d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1108d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1109d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1110cce7d346SDag-Erling Smørgrav escape_char, escape_char); 1111d4af9e69SDag-Erling Smørgrav } else { 1112d4af9e69SDag-Erling Smørgrav snprintf(string, sizeof string, 1113d4af9e69SDag-Erling Smørgrav "%c?\r\n\ 1114d4af9e69SDag-Erling Smørgrav Supported escape sequences:\r\n\ 1115d4af9e69SDag-Erling Smørgrav %c. - terminate connection (and any multiplexed sessions)\r\n\ 1116d95e11bfSDag-Erling Smørgrav %cB - send a BREAK to the remote system\r\n\ 11174b17dab0SDag-Erling Smørgrav %cC - open a command line\r\n\ 11184b17dab0SDag-Erling Smørgrav %cR - Request rekey (SSH protocol 2 only)\r\n\ 11194b17dab0SDag-Erling Smørgrav %c^Z - suspend ssh\r\n\ 11204b17dab0SDag-Erling Smørgrav %c# - list forwarded connections\r\n\ 11214b17dab0SDag-Erling Smørgrav %c& - background ssh (when waiting for connections to terminate)\r\n\ 11224b17dab0SDag-Erling Smørgrav %c? - this message\r\n\ 11234b17dab0SDag-Erling Smørgrav %c%c - send the escape character by typing it twice\r\n\ 1124b66f2d16SKris Kennaway (Note that escapes are only recognized immediately after newline.)\r\n", 1125d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1126d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1127d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1128d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1129d4af9e69SDag-Erling Smørgrav escape_char, escape_char, 1130d4af9e69SDag-Erling Smørgrav escape_char); 1131d4af9e69SDag-Erling Smørgrav } 1132b66f2d16SKris Kennaway buffer_append(berr, string, strlen(string)); 1133b66f2d16SKris Kennaway continue; 1134b66f2d16SKris Kennaway 1135b66f2d16SKris Kennaway case '#': 1136d4af9e69SDag-Erling Smørgrav snprintf(string, sizeof string, "%c#\r\n", 1137d4af9e69SDag-Erling Smørgrav escape_char); 1138b66f2d16SKris Kennaway buffer_append(berr, string, strlen(string)); 1139b66f2d16SKris Kennaway s = channel_open_message(); 1140b66f2d16SKris Kennaway buffer_append(berr, s, strlen(s)); 1141b66f2d16SKris Kennaway xfree(s); 1142b66f2d16SKris Kennaway continue; 1143b66f2d16SKris Kennaway 1144545d5ecaSDag-Erling Smørgrav case 'C': 1145b15c8340SDag-Erling Smørgrav if (c && c->ctl_chan != -1) 1146cce7d346SDag-Erling Smørgrav goto noescape; 1147545d5ecaSDag-Erling Smørgrav process_cmdline(); 1148545d5ecaSDag-Erling Smørgrav continue; 1149545d5ecaSDag-Erling Smørgrav 1150b66f2d16SKris Kennaway default: 1151b66f2d16SKris Kennaway if (ch != escape_char) { 1152b66f2d16SKris Kennaway buffer_put_char(bin, escape_char); 1153b66f2d16SKris Kennaway bytes++; 1154b66f2d16SKris Kennaway } 1155b66f2d16SKris Kennaway /* Escaped characters fall through here */ 1156b66f2d16SKris Kennaway break; 1157b66f2d16SKris Kennaway } 1158b66f2d16SKris Kennaway } else { 1159b66f2d16SKris Kennaway /* 1160d4af9e69SDag-Erling Smørgrav * The previous character was not an escape char. 1161d4af9e69SDag-Erling Smørgrav * Check if this is an escape. 1162b66f2d16SKris Kennaway */ 1163b66f2d16SKris Kennaway if (last_was_cr && ch == escape_char) { 1164d4af9e69SDag-Erling Smørgrav /* 1165d4af9e69SDag-Erling Smørgrav * It is. Set the flag and continue to 1166d4af9e69SDag-Erling Smørgrav * next character. 1167d4af9e69SDag-Erling Smørgrav */ 1168d4af9e69SDag-Erling Smørgrav *escape_pendingp = 1; 1169b66f2d16SKris Kennaway continue; 1170b66f2d16SKris Kennaway } 1171b66f2d16SKris Kennaway } 1172b66f2d16SKris Kennaway 1173b66f2d16SKris Kennaway /* 1174b66f2d16SKris Kennaway * Normal character. Record whether it was a newline, 1175b66f2d16SKris Kennaway * and append it to the buffer. 1176b66f2d16SKris Kennaway */ 1177b66f2d16SKris Kennaway last_was_cr = (ch == '\r' || ch == '\n'); 1178b66f2d16SKris Kennaway buffer_put_char(bin, ch); 1179b66f2d16SKris Kennaway bytes++; 1180b66f2d16SKris Kennaway } 1181b66f2d16SKris Kennaway return bytes; 1182b66f2d16SKris Kennaway } 1183b66f2d16SKris Kennaway 1184ae1f160dSDag-Erling Smørgrav static void 1185a04a10f8SKris Kennaway client_process_input(fd_set *readset) 1186a04a10f8SKris Kennaway { 1187a04a10f8SKris Kennaway int len; 11887aee6ffeSDag-Erling Smørgrav char buf[SSH_IOBUFSZ]; 1189a04a10f8SKris Kennaway 1190511b41d2SMark Murray /* Read input from stdin. */ 1191511b41d2SMark Murray if (FD_ISSET(fileno(stdin), readset)) { 1192511b41d2SMark Murray /* Read as much as possible. */ 1193511b41d2SMark Murray len = read(fileno(stdin), buf, sizeof(buf)); 1194d4af9e69SDag-Erling Smørgrav if (len < 0 && 1195d4af9e69SDag-Erling Smørgrav (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) 11961e8db6e2SBrian Feldman return; /* we'll try again later */ 1197511b41d2SMark Murray if (len <= 0) { 1198511b41d2SMark Murray /* 1199511b41d2SMark Murray * Received EOF or error. They are treated 1200511b41d2SMark Murray * similarly, except that an error message is printed 1201511b41d2SMark Murray * if it was an error condition. 1202511b41d2SMark Murray */ 1203511b41d2SMark Murray if (len < 0) { 1204d4af9e69SDag-Erling Smørgrav snprintf(buf, sizeof buf, "read: %.100s\r\n", 1205d4af9e69SDag-Erling Smørgrav strerror(errno)); 1206511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 1207511b41d2SMark Murray } 1208511b41d2SMark Murray /* Mark that we have seen EOF. */ 1209511b41d2SMark Murray stdin_eof = 1; 1210511b41d2SMark Murray /* 1211511b41d2SMark Murray * Send an EOF message to the server unless there is 1212511b41d2SMark Murray * data in the buffer. If there is data in the 1213511b41d2SMark Murray * buffer, no message will be sent now. Code 1214511b41d2SMark Murray * elsewhere will send the EOF when the buffer 1215511b41d2SMark Murray * becomes empty if stdin_eof is set. 1216511b41d2SMark Murray */ 1217511b41d2SMark Murray if (buffer_len(&stdin_buffer) == 0) { 1218511b41d2SMark Murray packet_start(SSH_CMSG_EOF); 1219511b41d2SMark Murray packet_send(); 1220511b41d2SMark Murray } 1221d4af9e69SDag-Erling Smørgrav } else if (escape_char1 == SSH_ESCAPECHAR_NONE) { 1222511b41d2SMark Murray /* 1223511b41d2SMark Murray * Normal successful read, and no escape character. 1224511b41d2SMark Murray * Just append the data to buffer. 1225511b41d2SMark Murray */ 1226511b41d2SMark Murray buffer_append(&stdin_buffer, buf, len); 1227511b41d2SMark Murray } else { 1228511b41d2SMark Murray /* 1229d4af9e69SDag-Erling Smørgrav * Normal, successful read. But we have an escape 1230d4af9e69SDag-Erling Smørgrav * character and have to process the characters one 1231d4af9e69SDag-Erling Smørgrav * by one. 1232511b41d2SMark Murray */ 1233d4af9e69SDag-Erling Smørgrav if (process_escapes(NULL, &stdin_buffer, 1234d4af9e69SDag-Erling Smørgrav &stdout_buffer, &stderr_buffer, buf, len) == -1) 1235511b41d2SMark Murray return; 1236511b41d2SMark Murray } 1237511b41d2SMark Murray } 1238511b41d2SMark Murray } 1239511b41d2SMark Murray 1240ae1f160dSDag-Erling Smørgrav static void 1241511b41d2SMark Murray client_process_output(fd_set *writeset) 1242511b41d2SMark Murray { 1243511b41d2SMark Murray int len; 1244511b41d2SMark Murray char buf[100]; 1245511b41d2SMark Murray 1246511b41d2SMark Murray /* Write buffered output to stdout. */ 1247511b41d2SMark Murray if (FD_ISSET(fileno(stdout), writeset)) { 1248511b41d2SMark Murray /* Write as much data as possible. */ 1249511b41d2SMark Murray len = write(fileno(stdout), buffer_ptr(&stdout_buffer), 1250511b41d2SMark Murray buffer_len(&stdout_buffer)); 1251511b41d2SMark Murray if (len <= 0) { 1252d4af9e69SDag-Erling Smørgrav if (errno == EINTR || errno == EAGAIN || 1253d4af9e69SDag-Erling Smørgrav errno == EWOULDBLOCK) 1254511b41d2SMark Murray len = 0; 1255511b41d2SMark Murray else { 1256511b41d2SMark Murray /* 1257511b41d2SMark Murray * An error or EOF was encountered. Put an 1258511b41d2SMark Murray * error message to stderr buffer. 1259511b41d2SMark Murray */ 1260d4af9e69SDag-Erling Smørgrav snprintf(buf, sizeof buf, 1261d4af9e69SDag-Erling Smørgrav "write stdout: %.50s\r\n", strerror(errno)); 1262511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 1263511b41d2SMark Murray quit_pending = 1; 1264511b41d2SMark Murray return; 1265511b41d2SMark Murray } 1266511b41d2SMark Murray } 1267511b41d2SMark Murray /* Consume printed data from the buffer. */ 1268511b41d2SMark Murray buffer_consume(&stdout_buffer, len); 1269511b41d2SMark Murray } 1270511b41d2SMark Murray /* Write buffered output to stderr. */ 1271511b41d2SMark Murray if (FD_ISSET(fileno(stderr), writeset)) { 1272511b41d2SMark Murray /* Write as much data as possible. */ 1273511b41d2SMark Murray len = write(fileno(stderr), buffer_ptr(&stderr_buffer), 1274511b41d2SMark Murray buffer_len(&stderr_buffer)); 1275511b41d2SMark Murray if (len <= 0) { 1276d4af9e69SDag-Erling Smørgrav if (errno == EINTR || errno == EAGAIN || 1277d4af9e69SDag-Erling Smørgrav errno == EWOULDBLOCK) 1278511b41d2SMark Murray len = 0; 1279511b41d2SMark Murray else { 1280d4af9e69SDag-Erling Smørgrav /* 1281d4af9e69SDag-Erling Smørgrav * EOF or error, but can't even print 1282d4af9e69SDag-Erling Smørgrav * error message. 1283d4af9e69SDag-Erling Smørgrav */ 1284511b41d2SMark Murray quit_pending = 1; 1285511b41d2SMark Murray return; 1286511b41d2SMark Murray } 1287511b41d2SMark Murray } 1288511b41d2SMark Murray /* Consume printed characters from the buffer. */ 1289511b41d2SMark Murray buffer_consume(&stderr_buffer, len); 1290511b41d2SMark Murray } 1291511b41d2SMark Murray } 1292511b41d2SMark Murray 1293511b41d2SMark Murray /* 1294a04a10f8SKris Kennaway * Get packets from the connection input buffer, and process them as long as 1295a04a10f8SKris Kennaway * there are packets available. 1296a04a10f8SKris Kennaway * 1297a04a10f8SKris Kennaway * Any unknown packets received during the actual 1298a04a10f8SKris Kennaway * session cause the session to terminate. This is 1299a04a10f8SKris Kennaway * intended to make debugging easier since no 1300a04a10f8SKris Kennaway * confirmations are sent. Any compatible protocol 1301a04a10f8SKris Kennaway * extensions must be negotiated during the 1302a04a10f8SKris Kennaway * preparatory phase. 1303a04a10f8SKris Kennaway */ 1304a04a10f8SKris Kennaway 1305ae1f160dSDag-Erling Smørgrav static void 13061e8db6e2SBrian Feldman client_process_buffered_input_packets(void) 1307a04a10f8SKris Kennaway { 1308d4af9e69SDag-Erling Smørgrav dispatch_run(DISPATCH_NONBLOCK, &quit_pending, 1309d4af9e69SDag-Erling Smørgrav compat20 ? xxx_kex : NULL); 1310a04a10f8SKris Kennaway } 1311a04a10f8SKris Kennaway 1312b66f2d16SKris Kennaway /* scan buf[] for '~' before sending data to the peer */ 1313b66f2d16SKris Kennaway 1314d4af9e69SDag-Erling Smørgrav /* Helper: allocate a new escape_filter_ctx and fill in its escape char */ 1315d4af9e69SDag-Erling Smørgrav void * 1316d4af9e69SDag-Erling Smørgrav client_new_escape_filter_ctx(int escape_char) 1317b66f2d16SKris Kennaway { 1318d4af9e69SDag-Erling Smørgrav struct escape_filter_ctx *ret; 1319d4af9e69SDag-Erling Smørgrav 1320d4af9e69SDag-Erling Smørgrav ret = xmalloc(sizeof(*ret)); 1321d4af9e69SDag-Erling Smørgrav ret->escape_pending = 0; 1322d4af9e69SDag-Erling Smørgrav ret->escape_char = escape_char; 1323d4af9e69SDag-Erling Smørgrav return (void *)ret; 1324d4af9e69SDag-Erling Smørgrav } 1325d4af9e69SDag-Erling Smørgrav 1326d4af9e69SDag-Erling Smørgrav /* Free the escape filter context on channel free */ 1327d4af9e69SDag-Erling Smørgrav void 1328d4af9e69SDag-Erling Smørgrav client_filter_cleanup(int cid, void *ctx) 1329d4af9e69SDag-Erling Smørgrav { 1330d4af9e69SDag-Erling Smørgrav xfree(ctx); 1331d4af9e69SDag-Erling Smørgrav } 1332d4af9e69SDag-Erling Smørgrav 1333d4af9e69SDag-Erling Smørgrav int 1334d4af9e69SDag-Erling Smørgrav client_simple_escape_filter(Channel *c, char *buf, int len) 1335d4af9e69SDag-Erling Smørgrav { 1336d4af9e69SDag-Erling Smørgrav if (c->extended_usage != CHAN_EXTENDED_WRITE) 1337d4af9e69SDag-Erling Smørgrav return 0; 1338d4af9e69SDag-Erling Smørgrav 1339d4af9e69SDag-Erling Smørgrav return process_escapes(c, &c->input, &c->output, &c->extended, 1340d4af9e69SDag-Erling Smørgrav buf, len); 1341b66f2d16SKris Kennaway } 1342b66f2d16SKris Kennaway 1343ae1f160dSDag-Erling Smørgrav static void 13441e8db6e2SBrian Feldman client_channel_closed(int id, void *arg) 13451e8db6e2SBrian Feldman { 1346ae1f160dSDag-Erling Smørgrav channel_cancel_cleanup(id); 13471e8db6e2SBrian Feldman session_closed = 1; 1348b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 13491e8db6e2SBrian Feldman } 13501e8db6e2SBrian Feldman 1351a04a10f8SKris Kennaway /* 1352511b41d2SMark Murray * Implements the interactive session with the server. This is called after 1353511b41d2SMark Murray * the user has been authenticated, and a command has been started on the 1354ae1f160dSDag-Erling Smørgrav * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character 1355ae1f160dSDag-Erling Smørgrav * used as an escape character for terminating or suspending the session. 1356511b41d2SMark Murray */ 1357511b41d2SMark Murray 1358511b41d2SMark Murray int 1359b66f2d16SKris Kennaway client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) 1360511b41d2SMark Murray { 13611e8db6e2SBrian Feldman fd_set *readset = NULL, *writeset = NULL; 1362511b41d2SMark Murray double start_time, total_time; 1363d74d50a8SDag-Erling Smørgrav int max_fd = 0, max_fd2 = 0, len, rekeying = 0; 1364d4af9e69SDag-Erling Smørgrav u_int64_t ibytes, obytes; 1365d74d50a8SDag-Erling Smørgrav u_int nalloc = 0; 1366511b41d2SMark Murray char buf[100]; 1367511b41d2SMark Murray 1368511b41d2SMark Murray debug("Entering interactive session."); 1369511b41d2SMark Murray 1370511b41d2SMark Murray start_time = get_current_time(); 1371511b41d2SMark Murray 1372511b41d2SMark Murray /* Initialize variables. */ 1373d4af9e69SDag-Erling Smørgrav escape_pending1 = 0; 1374511b41d2SMark Murray last_was_cr = 1; 1375511b41d2SMark Murray exit_status = -1; 1376511b41d2SMark Murray stdin_eof = 0; 1377511b41d2SMark Murray buffer_high = 64 * 1024; 1378511b41d2SMark Murray connection_in = packet_get_connection_in(); 1379511b41d2SMark Murray connection_out = packet_get_connection_out(); 13801e8db6e2SBrian Feldman max_fd = MAX(connection_in, connection_out); 13811e8db6e2SBrian Feldman 13821e8db6e2SBrian Feldman if (!compat20) { 13831e8db6e2SBrian Feldman /* enable nonblocking unless tty */ 13841e8db6e2SBrian Feldman if (!isatty(fileno(stdin))) 13851e8db6e2SBrian Feldman set_nonblock(fileno(stdin)); 13861e8db6e2SBrian Feldman if (!isatty(fileno(stdout))) 13871e8db6e2SBrian Feldman set_nonblock(fileno(stdout)); 13881e8db6e2SBrian Feldman if (!isatty(fileno(stderr))) 13891e8db6e2SBrian Feldman set_nonblock(fileno(stderr)); 13901e8db6e2SBrian Feldman max_fd = MAX(max_fd, fileno(stdin)); 13911e8db6e2SBrian Feldman max_fd = MAX(max_fd, fileno(stdout)); 13921e8db6e2SBrian Feldman max_fd = MAX(max_fd, fileno(stderr)); 13931e8db6e2SBrian Feldman } 1394511b41d2SMark Murray quit_pending = 0; 1395d4af9e69SDag-Erling Smørgrav escape_char1 = escape_char_arg; 1396511b41d2SMark Murray 1397511b41d2SMark Murray /* Initialize buffers. */ 1398511b41d2SMark Murray buffer_init(&stdin_buffer); 1399511b41d2SMark Murray buffer_init(&stdout_buffer); 1400511b41d2SMark Murray buffer_init(&stderr_buffer); 1401511b41d2SMark Murray 1402a04a10f8SKris Kennaway client_init_dispatch(); 1403a04a10f8SKris Kennaway 1404d0c8c0bcSDag-Erling Smørgrav /* 1405d0c8c0bcSDag-Erling Smørgrav * Set signal handlers, (e.g. to restore non-blocking mode) 1406d0c8c0bcSDag-Erling Smørgrav * but don't overwrite SIG_IGN, matches behaviour from rsh(1) 1407d0c8c0bcSDag-Erling Smørgrav */ 14085e8dbd04SDag-Erling Smørgrav if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 14095e8dbd04SDag-Erling Smørgrav signal(SIGHUP, signal_handler); 1410d0c8c0bcSDag-Erling Smørgrav if (signal(SIGINT, SIG_IGN) != SIG_IGN) 1411511b41d2SMark Murray signal(SIGINT, signal_handler); 1412d0c8c0bcSDag-Erling Smørgrav if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) 1413511b41d2SMark Murray signal(SIGQUIT, signal_handler); 1414d0c8c0bcSDag-Erling Smørgrav if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 1415511b41d2SMark Murray signal(SIGTERM, signal_handler); 1416511b41d2SMark Murray signal(SIGWINCH, window_change_handler); 1417511b41d2SMark Murray 1418511b41d2SMark Murray if (have_pty) 1419b15c8340SDag-Erling Smørgrav enter_raw_mode(force_tty_flag); 1420511b41d2SMark Murray 14211e8db6e2SBrian Feldman if (compat20) { 14221e8db6e2SBrian Feldman session_ident = ssh2_chan_id; 1423d4af9e69SDag-Erling Smørgrav if (escape_char_arg != SSH_ESCAPECHAR_NONE) 14241e8db6e2SBrian Feldman channel_register_filter(session_ident, 1425d4af9e69SDag-Erling Smørgrav client_simple_escape_filter, NULL, 1426d4af9e69SDag-Erling Smørgrav client_filter_cleanup, 1427d4af9e69SDag-Erling Smørgrav client_new_escape_filter_ctx(escape_char_arg)); 14281e8db6e2SBrian Feldman if (session_ident != -1) 14291e8db6e2SBrian Feldman channel_register_cleanup(session_ident, 1430021d409fSDag-Erling Smørgrav client_channel_closed, 0); 14311e8db6e2SBrian Feldman } else { 1432b66f2d16SKris Kennaway /* Check if we should immediately send eof on stdin. */ 1433511b41d2SMark Murray client_check_initial_eof_on_stdin(); 14341e8db6e2SBrian Feldman } 1435b66f2d16SKris Kennaway 1436511b41d2SMark Murray /* Main loop of the client for the interactive session mode. */ 1437511b41d2SMark Murray while (!quit_pending) { 1438511b41d2SMark Murray 1439511b41d2SMark Murray /* Process buffered packets sent by the server. */ 1440511b41d2SMark Murray client_process_buffered_input_packets(); 1441511b41d2SMark Murray 14421e8db6e2SBrian Feldman if (compat20 && session_closed && !channel_still_open()) 1443a04a10f8SKris Kennaway break; 1444a04a10f8SKris Kennaway 14451e8db6e2SBrian Feldman rekeying = (xxx_kex != NULL && !xxx_kex->done); 14461e8db6e2SBrian Feldman 14471e8db6e2SBrian Feldman if (rekeying) { 14481e8db6e2SBrian Feldman debug("rekeying in progress"); 14491e8db6e2SBrian Feldman } else { 1450511b41d2SMark Murray /* 14511e8db6e2SBrian Feldman * Make packets of buffered stdin data, and buffer 14521e8db6e2SBrian Feldman * them for sending to the server. 1453511b41d2SMark Murray */ 1454a04a10f8SKris Kennaway if (!compat20) 1455511b41d2SMark Murray client_make_packets_from_stdin_data(); 1456511b41d2SMark Murray 1457511b41d2SMark Murray /* 14581e8db6e2SBrian Feldman * Make packets from buffered channel data, and 14591e8db6e2SBrian Feldman * enqueue them for sending to the server. 1460511b41d2SMark Murray */ 1461511b41d2SMark Murray if (packet_not_very_much_data_to_write()) 1462511b41d2SMark Murray channel_output_poll(); 1463511b41d2SMark Murray 1464511b41d2SMark Murray /* 14651e8db6e2SBrian Feldman * Check if the window size has changed, and buffer a 14661e8db6e2SBrian Feldman * message about it to the server if so. 1467511b41d2SMark Murray */ 1468511b41d2SMark Murray client_check_window_change(); 1469511b41d2SMark Murray 1470511b41d2SMark Murray if (quit_pending) 1471511b41d2SMark Murray break; 14721e8db6e2SBrian Feldman } 1473511b41d2SMark Murray /* 1474511b41d2SMark Murray * Wait until we have something to do (something becomes 1475511b41d2SMark Murray * available on one of the descriptors). 1476511b41d2SMark Murray */ 1477ae1f160dSDag-Erling Smørgrav max_fd2 = max_fd; 14781e8db6e2SBrian Feldman client_wait_until_can_do_something(&readset, &writeset, 1479ae1f160dSDag-Erling Smørgrav &max_fd2, &nalloc, rekeying); 1480511b41d2SMark Murray 1481511b41d2SMark Murray if (quit_pending) 1482511b41d2SMark Murray break; 1483511b41d2SMark Murray 14841e8db6e2SBrian Feldman /* Do channel operations unless rekeying in progress. */ 14851e8db6e2SBrian Feldman if (!rekeying) { 14861e8db6e2SBrian Feldman channel_after_select(readset, writeset); 1487d95e11bfSDag-Erling Smørgrav if (need_rekeying || packet_need_rekeying()) { 1488d95e11bfSDag-Erling Smørgrav debug("need rekeying"); 14891e8db6e2SBrian Feldman xxx_kex->done = 0; 14901e8db6e2SBrian Feldman kex_send_kexinit(xxx_kex); 14911e8db6e2SBrian Feldman need_rekeying = 0; 14921e8db6e2SBrian Feldman } 14931e8db6e2SBrian Feldman } 1494511b41d2SMark Murray 1495a04a10f8SKris Kennaway /* Buffer input from the connection. */ 14961e8db6e2SBrian Feldman client_process_net_input(readset); 1497511b41d2SMark Murray 1498a04a10f8SKris Kennaway if (quit_pending) 1499a04a10f8SKris Kennaway break; 1500a04a10f8SKris Kennaway 1501a04a10f8SKris Kennaway if (!compat20) { 1502a04a10f8SKris Kennaway /* Buffer data from stdin */ 15031e8db6e2SBrian Feldman client_process_input(readset); 1504511b41d2SMark Murray /* 1505a04a10f8SKris Kennaway * Process output to stdout and stderr. Output to 1506a04a10f8SKris Kennaway * the connection is processed elsewhere (above). 1507511b41d2SMark Murray */ 15081e8db6e2SBrian Feldman client_process_output(writeset); 1509a04a10f8SKris Kennaway } 1510511b41d2SMark Murray 1511b15c8340SDag-Erling Smørgrav if (session_resumed) { 1512b15c8340SDag-Erling Smørgrav connection_in = packet_get_connection_in(); 1513b15c8340SDag-Erling Smørgrav connection_out = packet_get_connection_out(); 1514b15c8340SDag-Erling Smørgrav max_fd = MAX(max_fd, connection_out); 1515b15c8340SDag-Erling Smørgrav max_fd = MAX(max_fd, connection_in); 1516b15c8340SDag-Erling Smørgrav session_resumed = 0; 1517b15c8340SDag-Erling Smørgrav } 1518b15c8340SDag-Erling Smørgrav 1519d4af9e69SDag-Erling Smørgrav /* 1520d4af9e69SDag-Erling Smørgrav * Send as much buffered packet data as possible to the 1521d4af9e69SDag-Erling Smørgrav * sender. 1522d4af9e69SDag-Erling Smørgrav */ 15231e8db6e2SBrian Feldman if (FD_ISSET(connection_out, writeset)) 1524511b41d2SMark Murray packet_write_poll(); 1525e2f6069cSDag-Erling Smørgrav 1526e2f6069cSDag-Erling Smørgrav /* 1527e2f6069cSDag-Erling Smørgrav * If we are a backgrounded control master, and the 1528e2f6069cSDag-Erling Smørgrav * timeout has expired without any active client 1529e2f6069cSDag-Erling Smørgrav * connections, then quit. 1530e2f6069cSDag-Erling Smørgrav */ 1531e2f6069cSDag-Erling Smørgrav if (control_persist_exit_time > 0) { 1532e2f6069cSDag-Erling Smørgrav if (time(NULL) >= control_persist_exit_time) { 1533e2f6069cSDag-Erling Smørgrav debug("ControlPersist timeout expired"); 1534e2f6069cSDag-Erling Smørgrav break; 1535e2f6069cSDag-Erling Smørgrav } 1536e2f6069cSDag-Erling Smørgrav } 1537511b41d2SMark Murray } 15381e8db6e2SBrian Feldman if (readset) 15391e8db6e2SBrian Feldman xfree(readset); 15401e8db6e2SBrian Feldman if (writeset) 15411e8db6e2SBrian Feldman xfree(writeset); 1542511b41d2SMark Murray 1543511b41d2SMark Murray /* Terminate the session. */ 1544511b41d2SMark Murray 1545511b41d2SMark Murray /* Stop watching for window change. */ 1546511b41d2SMark Murray signal(SIGWINCH, SIG_DFL); 1547511b41d2SMark Murray 15487aee6ffeSDag-Erling Smørgrav if (compat20) { 15497aee6ffeSDag-Erling Smørgrav packet_start(SSH2_MSG_DISCONNECT); 15507aee6ffeSDag-Erling Smørgrav packet_put_int(SSH2_DISCONNECT_BY_APPLICATION); 15517aee6ffeSDag-Erling Smørgrav packet_put_cstring("disconnected by user"); 15528ad9b54aSDag-Erling Smørgrav packet_put_cstring(""); /* language tag */ 15537aee6ffeSDag-Erling Smørgrav packet_send(); 15547aee6ffeSDag-Erling Smørgrav packet_write_wait(); 15557aee6ffeSDag-Erling Smørgrav } 15567aee6ffeSDag-Erling Smørgrav 1557ae1f160dSDag-Erling Smørgrav channel_free_all(); 1558ae1f160dSDag-Erling Smørgrav 1559ae1f160dSDag-Erling Smørgrav if (have_pty) 1560b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 1561ae1f160dSDag-Erling Smørgrav 1562ae1f160dSDag-Erling Smørgrav /* restore blocking io */ 1563ae1f160dSDag-Erling Smørgrav if (!isatty(fileno(stdin))) 1564ae1f160dSDag-Erling Smørgrav unset_nonblock(fileno(stdin)); 1565ae1f160dSDag-Erling Smørgrav if (!isatty(fileno(stdout))) 1566ae1f160dSDag-Erling Smørgrav unset_nonblock(fileno(stdout)); 1567ae1f160dSDag-Erling Smørgrav if (!isatty(fileno(stderr))) 1568ae1f160dSDag-Erling Smørgrav unset_nonblock(fileno(stderr)); 1569ae1f160dSDag-Erling Smørgrav 1570efcad6b7SDag-Erling Smørgrav /* 1571efcad6b7SDag-Erling Smørgrav * If there was no shell or command requested, there will be no remote 1572efcad6b7SDag-Erling Smørgrav * exit status to be returned. In that case, clear error code if the 1573efcad6b7SDag-Erling Smørgrav * connection was deliberately terminated at this end. 1574efcad6b7SDag-Erling Smørgrav */ 1575efcad6b7SDag-Erling Smørgrav if (no_shell_flag && received_signal == SIGTERM) { 1576efcad6b7SDag-Erling Smørgrav received_signal = 0; 1577efcad6b7SDag-Erling Smørgrav exit_status = 0; 1578ae1f160dSDag-Erling Smørgrav } 1579511b41d2SMark Murray 1580efcad6b7SDag-Erling Smørgrav if (received_signal) 1581efcad6b7SDag-Erling Smørgrav fatal("Killed by signal %d.", (int) received_signal); 1582efcad6b7SDag-Erling Smørgrav 1583511b41d2SMark Murray /* 1584511b41d2SMark Murray * In interactive mode (with pseudo tty) display a message indicating 1585511b41d2SMark Murray * that the connection has been closed. 1586511b41d2SMark Murray */ 1587511b41d2SMark Murray if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { 1588d4af9e69SDag-Erling Smørgrav snprintf(buf, sizeof buf, 1589d4af9e69SDag-Erling Smørgrav "Connection to %.64s closed.\r\n", host); 1590511b41d2SMark Murray buffer_append(&stderr_buffer, buf, strlen(buf)); 1591511b41d2SMark Murray } 1592ae1f160dSDag-Erling Smørgrav 1593511b41d2SMark Murray /* Output any buffered data for stdout. */ 15944a421b63SDag-Erling Smørgrav if (buffer_len(&stdout_buffer) > 0) { 15954a421b63SDag-Erling Smørgrav len = atomicio(vwrite, fileno(stdout), 15964a421b63SDag-Erling Smørgrav buffer_ptr(&stdout_buffer), buffer_len(&stdout_buffer)); 15974a421b63SDag-Erling Smørgrav if (len < 0 || (u_int)len != buffer_len(&stdout_buffer)) 1598511b41d2SMark Murray error("Write failed flushing stdout buffer."); 15994a421b63SDag-Erling Smørgrav else 1600511b41d2SMark Murray buffer_consume(&stdout_buffer, len); 1601511b41d2SMark Murray } 1602511b41d2SMark Murray 1603511b41d2SMark Murray /* Output any buffered data for stderr. */ 16044a421b63SDag-Erling Smørgrav if (buffer_len(&stderr_buffer) > 0) { 16054a421b63SDag-Erling Smørgrav len = atomicio(vwrite, fileno(stderr), 16064a421b63SDag-Erling Smørgrav buffer_ptr(&stderr_buffer), buffer_len(&stderr_buffer)); 16074a421b63SDag-Erling Smørgrav if (len < 0 || (u_int)len != buffer_len(&stderr_buffer)) 1608511b41d2SMark Murray error("Write failed flushing stderr buffer."); 16094a421b63SDag-Erling Smørgrav else 1610511b41d2SMark Murray buffer_consume(&stderr_buffer, len); 1611511b41d2SMark Murray } 1612511b41d2SMark Murray 1613511b41d2SMark Murray /* Clear and free any buffers. */ 1614511b41d2SMark Murray memset(buf, 0, sizeof(buf)); 1615511b41d2SMark Murray buffer_free(&stdin_buffer); 1616511b41d2SMark Murray buffer_free(&stdout_buffer); 1617511b41d2SMark Murray buffer_free(&stderr_buffer); 1618511b41d2SMark Murray 1619511b41d2SMark Murray /* Report bytes transferred, and transfer rates. */ 1620511b41d2SMark Murray total_time = get_current_time() - start_time; 1621d4af9e69SDag-Erling Smørgrav packet_get_state(MODE_IN, NULL, NULL, NULL, &ibytes); 1622d4af9e69SDag-Erling Smørgrav packet_get_state(MODE_OUT, NULL, NULL, NULL, &obytes); 1623d4af9e69SDag-Erling Smørgrav verbose("Transferred: sent %llu, received %llu bytes, in %.1f seconds", 16244a421b63SDag-Erling Smørgrav (unsigned long long)obytes, (unsigned long long)ibytes, total_time); 1625511b41d2SMark Murray if (total_time > 0) 1626d4af9e69SDag-Erling Smørgrav verbose("Bytes per second: sent %.1f, received %.1f", 1627d4af9e69SDag-Erling Smørgrav obytes / total_time, ibytes / total_time); 1628511b41d2SMark Murray /* Return the exit status of the program. */ 1629511b41d2SMark Murray debug("Exit status %d", exit_status); 1630511b41d2SMark Murray return exit_status; 1631511b41d2SMark Murray } 1632a04a10f8SKris Kennaway 1633a04a10f8SKris Kennaway /*********/ 1634a04a10f8SKris Kennaway 1635ae1f160dSDag-Erling Smørgrav static void 1636ae1f160dSDag-Erling Smørgrav client_input_stdout_data(int type, u_int32_t seq, void *ctxt) 1637a04a10f8SKris Kennaway { 16381e8db6e2SBrian Feldman u_int data_len; 1639a04a10f8SKris Kennaway char *data = packet_get_string(&data_len); 1640ae1f160dSDag-Erling Smørgrav packet_check_eom(); 1641a04a10f8SKris Kennaway buffer_append(&stdout_buffer, data, data_len); 1642a04a10f8SKris Kennaway memset(data, 0, data_len); 1643a04a10f8SKris Kennaway xfree(data); 1644a04a10f8SKris Kennaway } 1645ae1f160dSDag-Erling Smørgrav static void 1646ae1f160dSDag-Erling Smørgrav client_input_stderr_data(int type, u_int32_t seq, void *ctxt) 1647a04a10f8SKris Kennaway { 16481e8db6e2SBrian Feldman u_int data_len; 1649a04a10f8SKris Kennaway char *data = packet_get_string(&data_len); 1650ae1f160dSDag-Erling Smørgrav packet_check_eom(); 1651a04a10f8SKris Kennaway buffer_append(&stderr_buffer, data, data_len); 1652a04a10f8SKris Kennaway memset(data, 0, data_len); 1653a04a10f8SKris Kennaway xfree(data); 1654a04a10f8SKris Kennaway } 1655ae1f160dSDag-Erling Smørgrav static void 1656ae1f160dSDag-Erling Smørgrav client_input_exit_status(int type, u_int32_t seq, void *ctxt) 1657a04a10f8SKris Kennaway { 1658a04a10f8SKris Kennaway exit_status = packet_get_int(); 1659ae1f160dSDag-Erling Smørgrav packet_check_eom(); 1660a04a10f8SKris Kennaway /* Acknowledge the exit. */ 1661a04a10f8SKris Kennaway packet_start(SSH_CMSG_EXIT_CONFIRMATION); 1662a04a10f8SKris Kennaway packet_send(); 1663a04a10f8SKris Kennaway /* 1664a04a10f8SKris Kennaway * Must wait for packet to be sent since we are 1665a04a10f8SKris Kennaway * exiting the loop. 1666a04a10f8SKris Kennaway */ 1667a04a10f8SKris Kennaway packet_write_wait(); 1668a04a10f8SKris Kennaway /* Flag that we want to exit. */ 1669a04a10f8SKris Kennaway quit_pending = 1; 1670a04a10f8SKris Kennaway } 1671efcad6b7SDag-Erling Smørgrav static void 1672efcad6b7SDag-Erling Smørgrav client_input_agent_open(int type, u_int32_t seq, void *ctxt) 1673efcad6b7SDag-Erling Smørgrav { 1674efcad6b7SDag-Erling Smørgrav Channel *c = NULL; 1675efcad6b7SDag-Erling Smørgrav int remote_id, sock; 1676efcad6b7SDag-Erling Smørgrav 1677efcad6b7SDag-Erling Smørgrav /* Read the remote channel number from the message. */ 1678efcad6b7SDag-Erling Smørgrav remote_id = packet_get_int(); 1679efcad6b7SDag-Erling Smørgrav packet_check_eom(); 1680efcad6b7SDag-Erling Smørgrav 1681efcad6b7SDag-Erling Smørgrav /* 1682efcad6b7SDag-Erling Smørgrav * Get a connection to the local authentication agent (this may again 1683efcad6b7SDag-Erling Smørgrav * get forwarded). 1684efcad6b7SDag-Erling Smørgrav */ 1685efcad6b7SDag-Erling Smørgrav sock = ssh_get_authentication_socket(); 1686efcad6b7SDag-Erling Smørgrav 1687efcad6b7SDag-Erling Smørgrav /* 1688efcad6b7SDag-Erling Smørgrav * If we could not connect the agent, send an error message back to 1689efcad6b7SDag-Erling Smørgrav * the server. This should never happen unless the agent dies, 1690efcad6b7SDag-Erling Smørgrav * because authentication forwarding is only enabled if we have an 1691efcad6b7SDag-Erling Smørgrav * agent. 1692efcad6b7SDag-Erling Smørgrav */ 1693efcad6b7SDag-Erling Smørgrav if (sock >= 0) { 1694efcad6b7SDag-Erling Smørgrav c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, 1695efcad6b7SDag-Erling Smørgrav -1, 0, 0, 0, "authentication agent connection", 1); 1696efcad6b7SDag-Erling Smørgrav c->remote_id = remote_id; 1697efcad6b7SDag-Erling Smørgrav c->force_drain = 1; 1698efcad6b7SDag-Erling Smørgrav } 1699efcad6b7SDag-Erling Smørgrav if (c == NULL) { 1700efcad6b7SDag-Erling Smørgrav packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); 1701efcad6b7SDag-Erling Smørgrav packet_put_int(remote_id); 1702efcad6b7SDag-Erling Smørgrav } else { 1703efcad6b7SDag-Erling Smørgrav /* Send a confirmation to the remote host. */ 1704efcad6b7SDag-Erling Smørgrav debug("Forwarding authentication connection."); 1705efcad6b7SDag-Erling Smørgrav packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); 1706efcad6b7SDag-Erling Smørgrav packet_put_int(remote_id); 1707efcad6b7SDag-Erling Smørgrav packet_put_int(c->self); 1708efcad6b7SDag-Erling Smørgrav } 1709efcad6b7SDag-Erling Smørgrav packet_send(); 1710efcad6b7SDag-Erling Smørgrav } 1711a04a10f8SKris Kennaway 1712ae1f160dSDag-Erling Smørgrav static Channel * 17131e8db6e2SBrian Feldman client_request_forwarded_tcpip(const char *request_type, int rchan) 17141e8db6e2SBrian Feldman { 17151e8db6e2SBrian Feldman Channel *c = NULL; 17161e8db6e2SBrian Feldman char *listen_address, *originator_address; 1717cce7d346SDag-Erling Smørgrav u_short listen_port, originator_port; 17181e8db6e2SBrian Feldman 17191e8db6e2SBrian Feldman /* Get rest of the packet */ 17201e8db6e2SBrian Feldman listen_address = packet_get_string(NULL); 17211e8db6e2SBrian Feldman listen_port = packet_get_int(); 17221e8db6e2SBrian Feldman originator_address = packet_get_string(NULL); 17231e8db6e2SBrian Feldman originator_port = packet_get_int(); 1724ae1f160dSDag-Erling Smørgrav packet_check_eom(); 17251e8db6e2SBrian Feldman 1726d4af9e69SDag-Erling Smørgrav debug("client_request_forwarded_tcpip: listen %s port %d, " 1727d4af9e69SDag-Erling Smørgrav "originator %s port %d", listen_address, listen_port, 1728d4af9e69SDag-Erling Smørgrav originator_address, originator_port); 17291e8db6e2SBrian Feldman 1730d4af9e69SDag-Erling Smørgrav c = channel_connect_by_listen_address(listen_port, 1731d4af9e69SDag-Erling Smørgrav "forwarded-tcpip", originator_address); 1732d4af9e69SDag-Erling Smørgrav 17331e8db6e2SBrian Feldman xfree(originator_address); 17341e8db6e2SBrian Feldman xfree(listen_address); 17351e8db6e2SBrian Feldman return c; 17361e8db6e2SBrian Feldman } 17371e8db6e2SBrian Feldman 1738ae1f160dSDag-Erling Smørgrav static Channel * 17391e8db6e2SBrian Feldman client_request_x11(const char *request_type, int rchan) 17401e8db6e2SBrian Feldman { 17411e8db6e2SBrian Feldman Channel *c = NULL; 17421e8db6e2SBrian Feldman char *originator; 1743cce7d346SDag-Erling Smørgrav u_short originator_port; 1744ae1f160dSDag-Erling Smørgrav int sock; 17451e8db6e2SBrian Feldman 17461e8db6e2SBrian Feldman if (!options.forward_x11) { 17471e8db6e2SBrian Feldman error("Warning: ssh server tried X11 forwarding."); 1748d4af9e69SDag-Erling Smørgrav error("Warning: this is probably a break-in attempt by a " 1749d4af9e69SDag-Erling Smørgrav "malicious server."); 17501e8db6e2SBrian Feldman return NULL; 17511e8db6e2SBrian Feldman } 1752e2f6069cSDag-Erling Smørgrav if (x11_refuse_time != 0 && time(NULL) >= x11_refuse_time) { 1753e2f6069cSDag-Erling Smørgrav verbose("Rejected X11 connection after ForwardX11Timeout " 1754e2f6069cSDag-Erling Smørgrav "expired"); 1755e2f6069cSDag-Erling Smørgrav return NULL; 1756e2f6069cSDag-Erling Smørgrav } 17571e8db6e2SBrian Feldman originator = packet_get_string(NULL); 17581e8db6e2SBrian Feldman if (datafellows & SSH_BUG_X11FWD) { 17591e8db6e2SBrian Feldman debug2("buggy server: x11 request w/o originator_port"); 17601e8db6e2SBrian Feldman originator_port = 0; 17611e8db6e2SBrian Feldman } else { 17621e8db6e2SBrian Feldman originator_port = packet_get_int(); 17631e8db6e2SBrian Feldman } 1764ae1f160dSDag-Erling Smørgrav packet_check_eom(); 17651e8db6e2SBrian Feldman /* XXX check permission */ 17661e8db6e2SBrian Feldman debug("client_request_x11: request from %s %d", originator, 17671e8db6e2SBrian Feldman originator_port); 1768ae1f160dSDag-Erling Smørgrav xfree(originator); 17691e8db6e2SBrian Feldman sock = x11_connect_display(); 1770ae1f160dSDag-Erling Smørgrav if (sock < 0) 1771ae1f160dSDag-Erling Smørgrav return NULL; 1772*89986192SBrooks Davis if (options.hpn_disabled) 1773*89986192SBrooks Davis c = channel_new("x11", SSH_CHANNEL_X11_OPEN, sock, sock, -1, 1774*89986192SBrooks Davis CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 1775*89986192SBrooks Davis 0, "x11", 1); 1776*89986192SBrooks Davis else 1777*89986192SBrooks Davis c = channel_new("x11", SSH_CHANNEL_X11_OPEN, sock, sock, -1, 1778*89986192SBrooks Davis options.hpn_buffer_size, CHAN_X11_PACKET_DEFAULT, 1779*89986192SBrooks Davis 0, "x11", 1); 1780ae1f160dSDag-Erling Smørgrav c->force_drain = 1; 17811e8db6e2SBrian Feldman return c; 17821e8db6e2SBrian Feldman } 17831e8db6e2SBrian Feldman 1784ae1f160dSDag-Erling Smørgrav static Channel * 17851e8db6e2SBrian Feldman client_request_agent(const char *request_type, int rchan) 17861e8db6e2SBrian Feldman { 17871e8db6e2SBrian Feldman Channel *c = NULL; 1788ae1f160dSDag-Erling Smørgrav int sock; 17891e8db6e2SBrian Feldman 17901e8db6e2SBrian Feldman if (!options.forward_agent) { 17911e8db6e2SBrian Feldman error("Warning: ssh server tried agent forwarding."); 1792d4af9e69SDag-Erling Smørgrav error("Warning: this is probably a break-in attempt by a " 1793d4af9e69SDag-Erling Smørgrav "malicious server."); 17941e8db6e2SBrian Feldman return NULL; 17951e8db6e2SBrian Feldman } 17961e8db6e2SBrian Feldman sock = ssh_get_authentication_socket(); 1797ae1f160dSDag-Erling Smørgrav if (sock < 0) 1798ae1f160dSDag-Erling Smørgrav return NULL; 1799*89986192SBrooks Davis if (options.hpn_disabled) 1800ae1f160dSDag-Erling Smørgrav c = channel_new("authentication agent connection", 18011e8db6e2SBrian Feldman SSH_CHANNEL_OPEN, sock, sock, -1, 1802*89986192SBrooks Davis CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, 1803*89986192SBrooks Davis "authentication agent connection", 1); 1804*89986192SBrooks Davis else 1805*89986192SBrooks Davis c = channel_new("authentication agent connection", 1806*89986192SBrooks Davis SSH_CHANNEL_OPEN, sock, sock, -1, 1807*89986192SBrooks Davis options.hpn_buffer_size, options.hpn_buffer_size, 0, 1808d95e11bfSDag-Erling Smørgrav "authentication agent connection", 1); 1809ae1f160dSDag-Erling Smørgrav c->force_drain = 1; 18101e8db6e2SBrian Feldman return c; 18111e8db6e2SBrian Feldman } 18121e8db6e2SBrian Feldman 1813d4af9e69SDag-Erling Smørgrav int 1814d4af9e69SDag-Erling Smørgrav client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun) 1815d4af9e69SDag-Erling Smørgrav { 1816d4af9e69SDag-Erling Smørgrav Channel *c; 1817d4af9e69SDag-Erling Smørgrav int fd; 1818d4af9e69SDag-Erling Smørgrav 1819d4af9e69SDag-Erling Smørgrav if (tun_mode == SSH_TUNMODE_NO) 1820d4af9e69SDag-Erling Smørgrav return 0; 1821d4af9e69SDag-Erling Smørgrav 1822d4af9e69SDag-Erling Smørgrav if (!compat20) { 1823cce7d346SDag-Erling Smørgrav error("Tunnel forwarding is not supported for protocol 1"); 1824d4af9e69SDag-Erling Smørgrav return -1; 1825d4af9e69SDag-Erling Smørgrav } 1826d4af9e69SDag-Erling Smørgrav 1827d4af9e69SDag-Erling Smørgrav debug("Requesting tun unit %d in mode %d", local_tun, tun_mode); 1828d4af9e69SDag-Erling Smørgrav 1829d4af9e69SDag-Erling Smørgrav /* Open local tunnel device */ 1830d4af9e69SDag-Erling Smørgrav if ((fd = tun_open(local_tun, tun_mode)) == -1) { 1831d4af9e69SDag-Erling Smørgrav error("Tunnel device open failed."); 1832d4af9e69SDag-Erling Smørgrav return -1; 1833d4af9e69SDag-Erling Smørgrav } 1834d4af9e69SDag-Erling Smørgrav 1835*89986192SBrooks Davis if (options.hpn_disabled) 1836d4af9e69SDag-Erling Smørgrav c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, 1837*89986192SBrooks Davis CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 1838*89986192SBrooks Davis 0, "tun", 1); 1839*89986192SBrooks Davis else 1840*89986192SBrooks Davis c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, 1841*89986192SBrooks Davis options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 1842*89986192SBrooks Davis 0, "tun", 1); 1843d4af9e69SDag-Erling Smørgrav c->datagram = 1; 1844d4af9e69SDag-Erling Smørgrav 1845d4af9e69SDag-Erling Smørgrav #if defined(SSH_TUN_FILTER) 1846d4af9e69SDag-Erling Smørgrav if (options.tun_open == SSH_TUNMODE_POINTOPOINT) 1847d4af9e69SDag-Erling Smørgrav channel_register_filter(c->self, sys_tun_infilter, 1848d4af9e69SDag-Erling Smørgrav sys_tun_outfilter, NULL, NULL); 1849d4af9e69SDag-Erling Smørgrav #endif 1850d4af9e69SDag-Erling Smørgrav 1851d4af9e69SDag-Erling Smørgrav packet_start(SSH2_MSG_CHANNEL_OPEN); 1852d4af9e69SDag-Erling Smørgrav packet_put_cstring("tun@openssh.com"); 1853d4af9e69SDag-Erling Smørgrav packet_put_int(c->self); 1854d4af9e69SDag-Erling Smørgrav packet_put_int(c->local_window_max); 1855d4af9e69SDag-Erling Smørgrav packet_put_int(c->local_maxpacket); 1856d4af9e69SDag-Erling Smørgrav packet_put_int(tun_mode); 1857d4af9e69SDag-Erling Smørgrav packet_put_int(remote_tun); 1858d4af9e69SDag-Erling Smørgrav packet_send(); 1859d4af9e69SDag-Erling Smørgrav 1860d4af9e69SDag-Erling Smørgrav return 0; 1861d4af9e69SDag-Erling Smørgrav } 1862d4af9e69SDag-Erling Smørgrav 1863a04a10f8SKris Kennaway /* XXXX move to generic input handler */ 1864ae1f160dSDag-Erling Smørgrav static void 1865ae1f160dSDag-Erling Smørgrav client_input_channel_open(int type, u_int32_t seq, void *ctxt) 1866a04a10f8SKris Kennaway { 1867a04a10f8SKris Kennaway Channel *c = NULL; 1868a04a10f8SKris Kennaway char *ctype; 1869a04a10f8SKris Kennaway int rchan; 1870ee21a45fSDag-Erling Smørgrav u_int rmaxpack, rwindow, len; 1871a04a10f8SKris Kennaway 1872a04a10f8SKris Kennaway ctype = packet_get_string(&len); 1873a04a10f8SKris Kennaway rchan = packet_get_int(); 1874a04a10f8SKris Kennaway rwindow = packet_get_int(); 1875a04a10f8SKris Kennaway rmaxpack = packet_get_int(); 1876a04a10f8SKris Kennaway 1877a04a10f8SKris Kennaway debug("client_input_channel_open: ctype %s rchan %d win %d max %d", 1878a04a10f8SKris Kennaway ctype, rchan, rwindow, rmaxpack); 1879a04a10f8SKris Kennaway 18801e8db6e2SBrian Feldman if (strcmp(ctype, "forwarded-tcpip") == 0) { 18811e8db6e2SBrian Feldman c = client_request_forwarded_tcpip(ctype, rchan); 18821e8db6e2SBrian Feldman } else if (strcmp(ctype, "x11") == 0) { 18831e8db6e2SBrian Feldman c = client_request_x11(ctype, rchan); 18841e8db6e2SBrian Feldman } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { 18851e8db6e2SBrian Feldman c = client_request_agent(ctype, rchan); 1886a04a10f8SKris Kennaway } 1887a04a10f8SKris Kennaway /* XXX duplicate : */ 1888a04a10f8SKris Kennaway if (c != NULL) { 1889a04a10f8SKris Kennaway debug("confirm %s", ctype); 1890a04a10f8SKris Kennaway c->remote_id = rchan; 1891a04a10f8SKris Kennaway c->remote_window = rwindow; 1892a04a10f8SKris Kennaway c->remote_maxpacket = rmaxpack; 1893ae1f160dSDag-Erling Smørgrav if (c->type != SSH_CHANNEL_CONNECTING) { 1894a04a10f8SKris Kennaway packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); 1895a04a10f8SKris Kennaway packet_put_int(c->remote_id); 1896a04a10f8SKris Kennaway packet_put_int(c->self); 1897a04a10f8SKris Kennaway packet_put_int(c->local_window); 1898a04a10f8SKris Kennaway packet_put_int(c->local_maxpacket); 1899a04a10f8SKris Kennaway packet_send(); 1900ae1f160dSDag-Erling Smørgrav } 1901a04a10f8SKris Kennaway } else { 1902a04a10f8SKris Kennaway debug("failure %s", ctype); 1903a04a10f8SKris Kennaway packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); 1904a04a10f8SKris Kennaway packet_put_int(rchan); 1905a04a10f8SKris Kennaway packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); 1906ae1f160dSDag-Erling Smørgrav if (!(datafellows & SSH_BUG_OPENFAILURE)) { 1907ae1f160dSDag-Erling Smørgrav packet_put_cstring("open failed"); 1908a04a10f8SKris Kennaway packet_put_cstring(""); 1909ae1f160dSDag-Erling Smørgrav } 1910a04a10f8SKris Kennaway packet_send(); 1911a04a10f8SKris Kennaway } 1912a04a10f8SKris Kennaway xfree(ctype); 1913a04a10f8SKris Kennaway } 1914ae1f160dSDag-Erling Smørgrav static void 1915ae1f160dSDag-Erling Smørgrav client_input_channel_req(int type, u_int32_t seq, void *ctxt) 19161e8db6e2SBrian Feldman { 19171e8db6e2SBrian Feldman Channel *c = NULL; 1918d74d50a8SDag-Erling Smørgrav int exitval, id, reply, success = 0; 19191e8db6e2SBrian Feldman char *rtype; 19201e8db6e2SBrian Feldman 19211e8db6e2SBrian Feldman id = packet_get_int(); 19221e8db6e2SBrian Feldman rtype = packet_get_string(NULL); 19231e8db6e2SBrian Feldman reply = packet_get_char(); 19241e8db6e2SBrian Feldman 19251e8db6e2SBrian Feldman debug("client_input_channel_req: channel %d rtype %s reply %d", 19261e8db6e2SBrian Feldman id, rtype, reply); 19271e8db6e2SBrian Feldman 1928d74d50a8SDag-Erling Smørgrav if (id == -1) { 1929d74d50a8SDag-Erling Smørgrav error("client_input_channel_req: request for channel -1"); 1930d74d50a8SDag-Erling Smørgrav } else if ((c = channel_lookup(id)) == NULL) { 1931d4af9e69SDag-Erling Smørgrav error("client_input_channel_req: channel %d: " 1932d4af9e69SDag-Erling Smørgrav "unknown channel", id); 1933d4af9e69SDag-Erling Smørgrav } else if (strcmp(rtype, "eow@openssh.com") == 0) { 1934d4af9e69SDag-Erling Smørgrav packet_check_eom(); 1935d4af9e69SDag-Erling Smørgrav chan_rcvd_eow(c); 19361e8db6e2SBrian Feldman } else if (strcmp(rtype, "exit-status") == 0) { 1937d74d50a8SDag-Erling Smørgrav exitval = packet_get_int(); 1938b15c8340SDag-Erling Smørgrav if (c->ctl_chan != -1) { 1939b15c8340SDag-Erling Smørgrav mux_exit_message(c, exitval); 1940b15c8340SDag-Erling Smørgrav success = 1; 1941b15c8340SDag-Erling Smørgrav } else if (id == session_ident) { 1942b15c8340SDag-Erling Smørgrav /* Record exit value of local session */ 19431e8db6e2SBrian Feldman success = 1; 1944d74d50a8SDag-Erling Smørgrav exit_status = exitval; 1945d74d50a8SDag-Erling Smørgrav } else { 1946b15c8340SDag-Erling Smørgrav /* Probably for a mux channel that has already closed */ 1947b15c8340SDag-Erling Smørgrav debug("%s: no sink for exit-status on channel %d", 1948b15c8340SDag-Erling Smørgrav __func__, id); 1949d74d50a8SDag-Erling Smørgrav } 1950ae1f160dSDag-Erling Smørgrav packet_check_eom(); 19511e8db6e2SBrian Feldman } 19524a421b63SDag-Erling Smørgrav if (reply && c != NULL) { 19531e8db6e2SBrian Feldman packet_start(success ? 19541e8db6e2SBrian Feldman SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); 1955cce7d346SDag-Erling Smørgrav packet_put_int(c->remote_id); 19561e8db6e2SBrian Feldman packet_send(); 19571e8db6e2SBrian Feldman } 19581e8db6e2SBrian Feldman xfree(rtype); 19591e8db6e2SBrian Feldman } 1960ae1f160dSDag-Erling Smørgrav static void 1961ae1f160dSDag-Erling Smørgrav client_input_global_request(int type, u_int32_t seq, void *ctxt) 1962ae1f160dSDag-Erling Smørgrav { 1963ae1f160dSDag-Erling Smørgrav char *rtype; 1964ae1f160dSDag-Erling Smørgrav int want_reply; 1965ae1f160dSDag-Erling Smørgrav int success = 0; 1966a04a10f8SKris Kennaway 1967ae1f160dSDag-Erling Smørgrav rtype = packet_get_string(NULL); 1968ae1f160dSDag-Erling Smørgrav want_reply = packet_get_char(); 1969efcad6b7SDag-Erling Smørgrav debug("client_input_global_request: rtype %s want_reply %d", 1970efcad6b7SDag-Erling Smørgrav rtype, want_reply); 1971ae1f160dSDag-Erling Smørgrav if (want_reply) { 1972ae1f160dSDag-Erling Smørgrav packet_start(success ? 1973ae1f160dSDag-Erling Smørgrav SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); 1974ae1f160dSDag-Erling Smørgrav packet_send(); 1975ae1f160dSDag-Erling Smørgrav packet_write_wait(); 1976ae1f160dSDag-Erling Smørgrav } 1977ae1f160dSDag-Erling Smørgrav xfree(rtype); 1978ae1f160dSDag-Erling Smørgrav } 1979ae1f160dSDag-Erling Smørgrav 1980d74d50a8SDag-Erling Smørgrav void 1981d74d50a8SDag-Erling Smørgrav client_session2_setup(int id, int want_tty, int want_subsystem, 1982d4af9e69SDag-Erling Smørgrav const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env) 1983d74d50a8SDag-Erling Smørgrav { 1984d74d50a8SDag-Erling Smørgrav int len; 19855e8dbd04SDag-Erling Smørgrav Channel *c = NULL; 1986d74d50a8SDag-Erling Smørgrav 1987d74d50a8SDag-Erling Smørgrav debug2("%s: id %d", __func__, id); 1988d74d50a8SDag-Erling Smørgrav 19895e8dbd04SDag-Erling Smørgrav if ((c = channel_lookup(id)) == NULL) 19905e8dbd04SDag-Erling Smørgrav fatal("client_session2_setup: channel %d: unknown channel", id); 19915e8dbd04SDag-Erling Smørgrav 19924a421b63SDag-Erling Smørgrav packet_set_interactive(want_tty, 19934a421b63SDag-Erling Smørgrav options.ip_qos_interactive, options.ip_qos_bulk); 19944a421b63SDag-Erling Smørgrav 1995d74d50a8SDag-Erling Smørgrav if (want_tty) { 1996d74d50a8SDag-Erling Smørgrav struct winsize ws; 1997d74d50a8SDag-Erling Smørgrav 1998d74d50a8SDag-Erling Smørgrav /* Store window size in the packet. */ 1999d74d50a8SDag-Erling Smørgrav if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) 2000d74d50a8SDag-Erling Smørgrav memset(&ws, 0, sizeof(ws)); 2001d74d50a8SDag-Erling Smørgrav 2002d4af9e69SDag-Erling Smørgrav channel_request_start(id, "pty-req", 1); 2003e2f6069cSDag-Erling Smørgrav client_expect_confirm(id, "PTY allocation", 1); 2004d74d50a8SDag-Erling Smørgrav packet_put_cstring(term != NULL ? term : ""); 2005761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_col); 2006761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_row); 2007761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_xpixel); 2008761efaa7SDag-Erling Smørgrav packet_put_int((u_int)ws.ws_ypixel); 2009d4af9e69SDag-Erling Smørgrav if (tiop == NULL) 2010d4af9e69SDag-Erling Smørgrav tiop = get_saved_tio(); 2011d4af9e69SDag-Erling Smørgrav tty_make_modes(-1, tiop); 2012d74d50a8SDag-Erling Smørgrav packet_send(); 2013d74d50a8SDag-Erling Smørgrav /* XXX wait for reply */ 20145e8dbd04SDag-Erling Smørgrav c->client_tty = 1; 2015d74d50a8SDag-Erling Smørgrav } 2016d74d50a8SDag-Erling Smørgrav 2017d74d50a8SDag-Erling Smørgrav /* Transfer any environment variables from client to server */ 2018d74d50a8SDag-Erling Smørgrav if (options.num_send_env != 0 && env != NULL) { 2019d74d50a8SDag-Erling Smørgrav int i, j, matched; 2020d74d50a8SDag-Erling Smørgrav char *name, *val; 2021d74d50a8SDag-Erling Smørgrav 2022d74d50a8SDag-Erling Smørgrav debug("Sending environment."); 2023d74d50a8SDag-Erling Smørgrav for (i = 0; env[i] != NULL; i++) { 2024d74d50a8SDag-Erling Smørgrav /* Split */ 2025d74d50a8SDag-Erling Smørgrav name = xstrdup(env[i]); 2026d74d50a8SDag-Erling Smørgrav if ((val = strchr(name, '=')) == NULL) { 2027021d409fSDag-Erling Smørgrav xfree(name); 2028d74d50a8SDag-Erling Smørgrav continue; 2029d74d50a8SDag-Erling Smørgrav } 2030d74d50a8SDag-Erling Smørgrav *val++ = '\0'; 2031d74d50a8SDag-Erling Smørgrav 2032d74d50a8SDag-Erling Smørgrav matched = 0; 2033d74d50a8SDag-Erling Smørgrav for (j = 0; j < options.num_send_env; j++) { 2034d74d50a8SDag-Erling Smørgrav if (match_pattern(name, options.send_env[j])) { 2035d74d50a8SDag-Erling Smørgrav matched = 1; 2036d74d50a8SDag-Erling Smørgrav break; 2037d74d50a8SDag-Erling Smørgrav } 2038d74d50a8SDag-Erling Smørgrav } 2039d74d50a8SDag-Erling Smørgrav if (!matched) { 2040d74d50a8SDag-Erling Smørgrav debug3("Ignored env %s", name); 2041021d409fSDag-Erling Smørgrav xfree(name); 2042d74d50a8SDag-Erling Smørgrav continue; 2043d74d50a8SDag-Erling Smørgrav } 2044d74d50a8SDag-Erling Smørgrav 2045d74d50a8SDag-Erling Smørgrav debug("Sending env %s = %s", name, val); 2046d74d50a8SDag-Erling Smørgrav channel_request_start(id, "env", 0); 2047d74d50a8SDag-Erling Smørgrav packet_put_cstring(name); 2048d74d50a8SDag-Erling Smørgrav packet_put_cstring(val); 2049d74d50a8SDag-Erling Smørgrav packet_send(); 2050021d409fSDag-Erling Smørgrav xfree(name); 2051d74d50a8SDag-Erling Smørgrav } 2052d74d50a8SDag-Erling Smørgrav } 2053d74d50a8SDag-Erling Smørgrav 2054d74d50a8SDag-Erling Smørgrav len = buffer_len(cmd); 2055d74d50a8SDag-Erling Smørgrav if (len > 0) { 2056d74d50a8SDag-Erling Smørgrav if (len > 900) 2057d74d50a8SDag-Erling Smørgrav len = 900; 2058d74d50a8SDag-Erling Smørgrav if (want_subsystem) { 2059d4af9e69SDag-Erling Smørgrav debug("Sending subsystem: %.*s", 2060d4af9e69SDag-Erling Smørgrav len, (u_char*)buffer_ptr(cmd)); 2061d4af9e69SDag-Erling Smørgrav channel_request_start(id, "subsystem", 1); 2062d4af9e69SDag-Erling Smørgrav client_expect_confirm(id, "subsystem", 1); 2063d74d50a8SDag-Erling Smørgrav } else { 2064d4af9e69SDag-Erling Smørgrav debug("Sending command: %.*s", 2065d4af9e69SDag-Erling Smørgrav len, (u_char*)buffer_ptr(cmd)); 2066d4af9e69SDag-Erling Smørgrav channel_request_start(id, "exec", 1); 2067d4af9e69SDag-Erling Smørgrav client_expect_confirm(id, "exec", 1); 2068d74d50a8SDag-Erling Smørgrav } 2069d74d50a8SDag-Erling Smørgrav packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); 2070d74d50a8SDag-Erling Smørgrav packet_send(); 2071d74d50a8SDag-Erling Smørgrav } else { 2072d4af9e69SDag-Erling Smørgrav channel_request_start(id, "shell", 1); 2073d4af9e69SDag-Erling Smørgrav client_expect_confirm(id, "shell", 1); 2074d74d50a8SDag-Erling Smørgrav packet_send(); 2075d74d50a8SDag-Erling Smørgrav } 2076d74d50a8SDag-Erling Smørgrav } 2077d74d50a8SDag-Erling Smørgrav 2078ae1f160dSDag-Erling Smørgrav static void 20791e8db6e2SBrian Feldman client_init_dispatch_20(void) 2080a04a10f8SKris Kennaway { 2081a04a10f8SKris Kennaway dispatch_init(&dispatch_protocol_error); 2082545d5ecaSDag-Erling Smørgrav 2083a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); 2084a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); 2085a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); 2086a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); 2087a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); 2088a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); 2089a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); 20901e8db6e2SBrian Feldman dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); 2091a04a10f8SKris Kennaway dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); 2092d4af9e69SDag-Erling Smørgrav dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm); 2093d4af9e69SDag-Erling Smørgrav dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm); 2094ae1f160dSDag-Erling Smørgrav dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); 20951e8db6e2SBrian Feldman 20961e8db6e2SBrian Feldman /* rekeying */ 20971e8db6e2SBrian Feldman dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); 2098545d5ecaSDag-Erling Smørgrav 2099545d5ecaSDag-Erling Smørgrav /* global request reply messages */ 2100545d5ecaSDag-Erling Smørgrav dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); 2101545d5ecaSDag-Erling Smørgrav dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); 2102a04a10f8SKris Kennaway } 2103d4af9e69SDag-Erling Smørgrav 2104ae1f160dSDag-Erling Smørgrav static void 21051e8db6e2SBrian Feldman client_init_dispatch_13(void) 2106a04a10f8SKris Kennaway { 2107a04a10f8SKris Kennaway dispatch_init(NULL); 2108a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); 2109a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); 2110a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); 2111a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); 2112a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); 2113a04a10f8SKris Kennaway dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); 2114a04a10f8SKris Kennaway dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); 2115a04a10f8SKris Kennaway dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); 2116a04a10f8SKris Kennaway dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); 21174899dde7SBrian Feldman 21184899dde7SBrian Feldman dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? 2119efcad6b7SDag-Erling Smørgrav &client_input_agent_open : &deny_input_open); 21204899dde7SBrian Feldman dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? 21215b9b2fafSBrian Feldman &x11_input_open : &deny_input_open); 2122a04a10f8SKris Kennaway } 2123d4af9e69SDag-Erling Smørgrav 2124ae1f160dSDag-Erling Smørgrav static void 21251e8db6e2SBrian Feldman client_init_dispatch_15(void) 2126a04a10f8SKris Kennaway { 2127a04a10f8SKris Kennaway client_init_dispatch_13(); 2128a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); 2129a04a10f8SKris Kennaway dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); 2130a04a10f8SKris Kennaway } 2131d4af9e69SDag-Erling Smørgrav 2132ae1f160dSDag-Erling Smørgrav static void 21331e8db6e2SBrian Feldman client_init_dispatch(void) 2134a04a10f8SKris Kennaway { 2135a04a10f8SKris Kennaway if (compat20) 2136a04a10f8SKris Kennaway client_init_dispatch_20(); 2137a04a10f8SKris Kennaway else if (compat13) 2138a04a10f8SKris Kennaway client_init_dispatch_13(); 2139a04a10f8SKris Kennaway else 2140a04a10f8SKris Kennaway client_init_dispatch_15(); 2141a04a10f8SKris Kennaway } 2142efcad6b7SDag-Erling Smørgrav 2143efcad6b7SDag-Erling Smørgrav /* client specific fatal cleanup */ 2144efcad6b7SDag-Erling Smørgrav void 2145efcad6b7SDag-Erling Smørgrav cleanup_exit(int i) 2146efcad6b7SDag-Erling Smørgrav { 2147b15c8340SDag-Erling Smørgrav leave_raw_mode(force_tty_flag); 2148efcad6b7SDag-Erling Smørgrav leave_non_blocking(); 2149d4af9e69SDag-Erling Smørgrav if (options.control_path != NULL && muxserver_sock != -1) 2150d74d50a8SDag-Erling Smørgrav unlink(options.control_path); 21514a421b63SDag-Erling Smørgrav ssh_kill_proxy_command(); 2152efcad6b7SDag-Erling Smørgrav _exit(i); 2153efcad6b7SDag-Erling Smørgrav } 2154