2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * Created: Sat Mar 18 16:36:11 1995 ylo
6 * Ssh client program. This program can be used to log into a remote machine.
7 * The software supports strong authentication, encryption, and forwarding
8 * of X11, TCP/IP, and authentication connections.
10 * Modified to work with SSL by Niels Provos <provos@citi.umich.edu> in Canada.
14 RCSID("$OpenBSD: ssh.c,v 1.56 2000/06/20 01:39:44 markus Exp $");
16 #include <openssl/evp.h>
17 #include <openssl/dsa.h>
18 #include <openssl/rsa.h>
34 #ifdef HAVE___PROGNAME
35 extern char *__progname;
36 #else /* HAVE___PROGNAME */
37 static const char *__progname = "ssh";
38 #endif /* HAVE___PROGNAME */
40 /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
41 Default value is AF_UNSPEC means both IPv4 and IPv6. */
43 int IPv4or6 = AF_INET;
45 int IPv4or6 = AF_UNSPEC;
48 /* Flag indicating whether debug mode is on. This can be set on the command line. */
51 /* Flag indicating whether a tty should be allocated */
54 /* don't exec a shell */
55 int no_shell_flag = 0;
59 * Flag indicating that nothing should be read from stdin. This can be set
60 * on the command line.
62 int stdin_null_flag = 0;
65 * Flag indicating that ssh should fork after authentication. This is useful
66 * so that the pasphrase can be entered manually, and then ssh goes to the
69 int fork_after_authentication_flag = 0;
72 * General data structure for command line options and options configurable
73 * in configuration files. See readconf.h.
78 * Name of the host we are connecting to. This is the name given on the
79 * command line, or the HostName specified for the user-supplied name in a
84 /* socket address the host resolves to */
85 struct sockaddr_storage hostaddr;
88 * Flag to indicate that we have received a window change signal which has
89 * not yet been processed. This will cause a message indicating the new
90 * window size to be sent to the server a little later. This is volatile
91 * because this is updated in a signal handler.
93 volatile int received_window_change_signal = 0;
95 /* Value of argv[0] (set in the main program). */
98 /* Flag indicating whether we have a valid host private key loaded. */
99 int host_private_key_loaded = 0;
101 /* Host private key. */
102 RSA *host_private_key = NULL;
104 /* Original real UID. */
105 uid_t original_real_uid;
107 /* command to be executed */
110 /* Prints a help message to the user. This function never returns. */
115 fprintf(stderr, "Usage: %s [options] host [command]\n", av0);
116 fprintf(stderr, "Options:\n");
117 fprintf(stderr, " -l user Log in using this user name.\n");
118 fprintf(stderr, " -n Redirect input from /dev/null.\n");
119 fprintf(stderr, " -A Enable authentication agent forwarding.\n");
120 fprintf(stderr, " -a Disable authentication agent forwarding.\n");
122 fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
124 fprintf(stderr, " -X Enable X11 connection forwarding.\n");
125 fprintf(stderr, " -x Disable X11 connection forwarding.\n");
126 fprintf(stderr, " -i file Identity for RSA authentication (default: ~/.ssh/identity).\n");
127 fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
128 fprintf(stderr, " -T Do not allocate a tty.\n");
129 fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
130 fprintf(stderr, " -V Display version number only.\n");
131 fprintf(stderr, " -P Don't allocate a privileged port.\n");
132 fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
133 fprintf(stderr, " -f Fork into background after authentication.\n");
134 fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
136 fprintf(stderr, " -c cipher Select encryption algorithm: "
139 fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
140 fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
141 fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
142 fprintf(stderr, " These cause %s to listen for connections on a port, and\n", av0);
143 fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
144 fprintf(stderr, " -C Enable compression.\n");
145 fprintf(stderr, " -N Do not execute a shell or command.\n");
146 fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
147 fprintf(stderr, " -4 Use IPv4 only.\n");
148 fprintf(stderr, " -6 Use IPv6 only.\n");
149 fprintf(stderr, " -2 Force protocol version 2.\n");
150 fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
155 * Connects to the given host using rsh (or prints an error message and exits
156 * if rsh is not available). This function never returns.
159 rsh_connect(char *host, char *user, Buffer * command)
164 log("Using rsh. WARNING: Connection will not be encrypted.");
165 /* Build argument list for rsh. */
167 args[i++] = _PATH_RSH;
168 /* host may have to come after user on some systems */
174 if (buffer_len(command) > 0) {
175 buffer_append(command, "\0", 1);
176 args[i++] = buffer_ptr(command);
180 for (i = 0; args[i]; i++) {
182 fprintf(stderr, " ");
183 fprintf(stderr, "%s", args[i]);
185 fprintf(stderr, "\n");
187 execv(_PATH_RSH, args);
192 int ssh_session(void);
193 int ssh_session2(void);
196 * Main program for the ssh client.
199 main(int ac, char **av)
201 int i, opt, optind, exit_status, ok;
202 u_short fwd_port, fwd_host_port;
203 char *optarg, *cp, buf[256];
205 struct passwd *pw, pwcopy;
207 uid_t original_effective_uid;
210 * Save the original real uid. It will be needed later (uid-swapping
211 * may clobber the real uid).
213 original_real_uid = getuid();
214 original_effective_uid = geteuid();
216 /* If we are installed setuid root be careful to not drop core. */
217 if (original_real_uid != original_effective_uid) {
219 rlim.rlim_cur = rlim.rlim_max = 0;
220 if (setrlimit(RLIMIT_CORE, &rlim) < 0)
221 fatal("setrlimit failed: %.100s", strerror(errno));
224 * Use uid-swapping to give up root privileges for the duration of
225 * option processing. We will re-instantiate the rights when we are
226 * ready to create the privileged port, and will permanently drop
227 * them when the port has been created (actually, when the connection
228 * has been made, as we may need to create the port several times).
230 temporarily_use_uid(original_real_uid);
233 * Set our umask to something reasonable, as some files are created
234 * with the default umask. This will make them world-readable but
235 * writable only by the owner, which is ok for all files for which we
236 * don't set the modes explicitly.
240 /* Save our own name. */
243 /* Initialize option structure to indicate that no values have been set. */
244 initialize_options(&options);
246 /* Parse command-line arguments. */
249 /* If program name is not one of the standard names, use it as host name. */
250 if (strchr(av0, '/'))
251 cp = strrchr(av0, '/') + 1;
254 if (strcmp(cp, "rsh") != 0 && strcmp(cp, "ssh") != 0 &&
255 strcmp(cp, "rlogin") != 0 && strcmp(cp, "slogin") != 0)
258 for (optind = 1; optind < ac; optind++) {
259 if (av[optind][0] != '-') {
262 if ((cp = strchr(av[optind], '@'))) {
265 options.user = av[optind];
275 if (strchr("eilcpLRo", opt)) { /* options with arguments */
276 optarg = av[optind] + 2;
277 if (strcmp(optarg, "") == 0) {
278 if (optind >= ac - 1)
280 optarg = av[++optind];
289 options.protocol = SSH_PROTO_2;
301 fork_after_authentication_flag = 1;
305 options.forward_x11 = 0;
308 options.forward_x11 = 1;
311 options.gateway_ports = 1;
314 options.use_privileged_port = 0;
317 options.forward_agent = 0;
320 options.forward_agent = 1;
324 options.kerberos_tgt_passing = 0;
325 options.afs_token_passing = 0;
329 if (stat(optarg, &st) < 0) {
330 fprintf(stderr, "Warning: Identity file %s does not exist.\n",
334 if (options.num_identity_files >= SSH_MAX_IDENTITY_FILES)
335 fatal("Too many identity files specified (max %d)",
336 SSH_MAX_IDENTITY_FILES);
337 options.identity_files[options.num_identity_files++] =
345 fprintf(stderr, "SSH Version %s, protocol versions %d.%d/%d.%d.\n",
347 PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
348 PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2);
349 fprintf(stderr, "Compiled with SSL (0x%8.8lx).\n", SSLeay());
353 options.log_level = SYSLOG_LEVEL_DEBUG;
356 options.log_level = SYSLOG_LEVEL_QUIET;
359 if (optarg[0] == '^' && optarg[2] == 0 &&
360 (unsigned char) optarg[1] >= 64 && (unsigned char) optarg[1] < 128)
361 options.escape_char = (unsigned char) optarg[1] & 31;
362 else if (strlen(optarg) == 1)
363 options.escape_char = (unsigned char) optarg[0];
364 else if (strcmp(optarg, "none") == 0)
365 options.escape_char = -2;
367 fprintf(stderr, "Bad escape character '%s'.\n", optarg);
372 if (ciphers_valid(optarg)) {
374 options.ciphers = xstrdup(optarg);
375 options.cipher = SSH_CIPHER_ILLEGAL;
378 options.cipher = cipher_number(optarg);
379 if (options.cipher == -1) {
380 fprintf(stderr, "Unknown cipher type '%s'\n", optarg);
386 options.port = atoi(optarg);
389 options.user = optarg;
392 if (sscanf(optarg, "%hu/%255[^/]/%hu", &fwd_port, buf,
393 &fwd_host_port) != 3 &&
394 sscanf(optarg, "%hu:%255[^:]:%hu", &fwd_port, buf,
395 &fwd_host_port) != 3) {
396 fprintf(stderr, "Bad forwarding specification '%s'.\n", optarg);
400 add_remote_forward(&options, fwd_port, buf, fwd_host_port);
403 if (sscanf(optarg, "%hu/%255[^/]/%hu", &fwd_port, buf,
404 &fwd_host_port) != 3 &&
405 sscanf(optarg, "%hu:%255[^:]:%hu", &fwd_port, buf,
406 &fwd_host_port) != 3) {
407 fprintf(stderr, "Bad forwarding specification '%s'.\n", optarg);
411 add_local_forward(&options, fwd_port, buf, fwd_host_port);
414 options.compression = 1;
425 if (process_config_line(&options, host ? host : "", optarg,
426 "command-line", 0, &dummy) != 0)
434 /* Check that we got a host name. */
438 /* Initialize the command to execute on remote host. */
439 buffer_init(&command);
441 SSLeay_add_all_algorithms();
444 * Save the command to execute on the remote host in a buffer. There
445 * is no limit on the length of the command, except by the maximum
446 * packet size. Also sets the tty flag if there is no command.
449 /* No command specified - execute shell on a tty. */
452 /* A command has been specified. Store it into the
454 for (i = optind; i < ac; i++) {
456 buffer_append(&command, " ", 1);
457 buffer_append(&command, av[i], strlen(av[i]));
461 /* Cannot fork to background if no command. */
462 if (fork_after_authentication_flag && buffer_len(&command) == 0)
463 fatal("Cannot fork into background without a command to execute.");
465 /* Allocate a tty by default if no command specified. */
466 if (buffer_len(&command) == 0)
469 /* Do not allocate a tty if stdin is not a tty. */
470 if (!isatty(fileno(stdin))) {
472 fprintf(stderr, "Pseudo-terminal will not be allocated because stdin is not a terminal.\n");
480 pw = getpwuid(original_real_uid);
482 fprintf(stderr, "You don't exist, go away!\n");
485 /* Take a copy of the returned structure. */
486 memset(&pwcopy, 0, sizeof(pwcopy));
487 pwcopy.pw_name = xstrdup(pw->pw_name);
488 pwcopy.pw_passwd = xstrdup(pw->pw_passwd);
489 pwcopy.pw_uid = pw->pw_uid;
490 pwcopy.pw_gid = pw->pw_gid;
491 pwcopy.pw_dir = xstrdup(pw->pw_dir);
492 pwcopy.pw_shell = xstrdup(pw->pw_shell);
495 /* Initialize "log" output. Since we are the client all output
496 actually goes to the terminal. */
497 log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 0);
499 /* Read per-user configuration file. */
500 snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir, SSH_USER_CONFFILE);
501 read_config_file(buf, host, &options);
503 /* Read systemwide configuration file. */
504 read_config_file(HOST_CONFIG_FILE, host, &options);
506 /* Fill configuration defaults. */
507 fill_default_options(&options);
510 log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 0);
512 /* check if RSA support exists */
513 if ((options.protocol & SSH_PROTO_1) &&
515 log("%s: no RSA support in libssl and libcrypto. See ssl(8).",
517 log("Disabling protocol version 1");
518 options.protocol &= ~ (SSH_PROTO_1|SSH_PROTO_1_PREFERRED);
520 if (! options.protocol & (SSH_PROTO_1|SSH_PROTO_2)) {
521 fprintf(stderr, "%s: No protocol version available.\n",
526 if (options.user == NULL)
527 options.user = xstrdup(pw->pw_name);
529 if (options.hostname != NULL)
530 host = options.hostname;
532 /* Find canonic host name. */
533 if (strchr(host, '.') == 0) {
534 struct addrinfo hints;
535 struct addrinfo *ai = NULL;
537 memset(&hints, 0, sizeof(hints));
538 hints.ai_family = IPv4or6;
539 hints.ai_flags = AI_CANONNAME;
540 hints.ai_socktype = SOCK_STREAM;
541 errgai = getaddrinfo(host, NULL, &hints, &ai);
543 if (ai->ai_canonname != NULL)
544 host = xstrdup(ai->ai_canonname);
548 /* Disable rhosts authentication if not running as root. */
549 if (original_effective_uid != 0 || !options.use_privileged_port) {
550 options.rhosts_authentication = 0;
551 options.rhosts_rsa_authentication = 0;
554 * If using rsh has been selected, exec it now (without trying
555 * anything else). Note that we must release privileges first.
557 if (options.use_rsh) {
559 * Restore our superuser privileges. This must be done
560 * before permanently setting the uid.
564 /* Switch to the original uid permanently. */
565 permanently_set_uid(original_real_uid);
568 rsh_connect(host, options.user, &command);
569 fatal("rsh_connect returned");
571 /* Restore our superuser privileges. */
575 * Open a connection to the remote host. This needs root privileges
576 * if rhosts_{rsa_}authentication is enabled.
579 ok = ssh_connect(host, &hostaddr, options.port,
580 options.connection_attempts,
581 !options.rhosts_authentication &&
582 !options.rhosts_rsa_authentication,
584 options.proxy_command);
587 * If we successfully made the connection, load the host private key
588 * in case we will need it later for combined rsa-rhosts
589 * authentication. This must be done before releasing extra
590 * privileges, because the file is only readable by root.
592 if (ok && (options.protocol & SSH_PROTO_1)) {
594 host_private_key = RSA_new();
596 k.rsa = host_private_key;
597 if (load_private_key(HOST_KEY_FILE, "", &k, NULL))
598 host_private_key_loaded = 1;
601 * Get rid of any extra privileges that we may have. We will no
602 * longer need them. Also, extra privileges could make it very hard
603 * to read identity files and other non-world-readable files from the
604 * user's home directory if it happens to be on a NFS volume where
605 * root is mapped to nobody.
609 * Note that some legacy systems need to postpone the following call
610 * to permanently_set_uid() until the private hostkey is destroyed
611 * with RSA_free(). Otherwise the calling user could ptrace() the
612 * process, read the private hostkey and impersonate the host.
613 * OpenBSD does not allow ptracing of setuid processes.
615 permanently_set_uid(original_real_uid);
618 * Now that we are back to our own permissions, create ~/.ssh
619 * directory if it doesn\'t already exist.
621 snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir, SSH_USER_DIR);
622 if (stat(buf, &st) < 0)
623 if (mkdir(buf, 0755) < 0)
624 error("Could not create directory '%.200s'.", buf);
626 /* Check if the connection failed, and try "rsh" if appropriate. */
628 if (options.port != 0)
629 log("Secure connection to %.100s on port %hu refused%.100s.",
631 options.fallback_to_rsh ? "; reverting to insecure method" : "");
633 log("Secure connection to %.100s refused%.100s.", host,
634 options.fallback_to_rsh ? "; reverting to insecure method" : "");
636 if (options.fallback_to_rsh) {
637 rsh_connect(host, options.user, &command);
638 fatal("rsh_connect returned");
642 /* Expand ~ in options.identity_files. */
644 for (i = 0; i < options.num_identity_files; i++)
645 options.identity_files[i] =
646 tilde_expand_filename(options.identity_files[i], original_real_uid);
647 for (i = 0; i < options.num_identity_files2; i++)
648 options.identity_files2[i] =
649 tilde_expand_filename(options.identity_files2[i], original_real_uid);
650 /* Expand ~ in known host file names. */
651 options.system_hostfile = tilde_expand_filename(options.system_hostfile,
653 options.user_hostfile = tilde_expand_filename(options.user_hostfile,
655 options.system_hostfile2 = tilde_expand_filename(options.system_hostfile2,
657 options.user_hostfile2 = tilde_expand_filename(options.user_hostfile2,
660 /* Log into the remote system. This never returns if the login fails. */
661 ssh_login(host_private_key_loaded, host_private_key,
662 host, (struct sockaddr *)&hostaddr, original_real_uid);
664 /* We no longer need the host private key. Clear it now. */
665 if (host_private_key_loaded)
666 RSA_free(host_private_key); /* Destroys contents safely */
668 exit_status = compat20 ? ssh_session2() : ssh_session();
674 x11_get_proto(char *proto, int proto_len, char *data, int data_len)
680 if (options.xauth_location) {
681 /* Try to get Xauthority information for the display. */
682 snprintf(line, sizeof line, "%.100s list %.200s 2>/dev/null",
683 options.xauth_location, getenv("DISPLAY"));
684 f = popen(line, "r");
685 if (f && fgets(line, sizeof(line), f) &&
686 sscanf(line, "%*s %s %s", proto, data) == 2)
692 * If we didn't get authentication data, just make up some
693 * data. The forwarding code will check the validity of the
694 * response anyway, and substitute this data. The X11
695 * server, however, will ignore this fake data and use
696 * whatever authentication mechanisms it was using otherwise
697 * for the local connection.
702 strlcpy(proto, "MIT-MAGIC-COOKIE-1", proto_len);
703 for (i = 0; i < 16; i++) {
706 snprintf(data + 2 * i, data_len - 2 * i, "%02x", rand & 0xff);
724 /* Enable compression if requested. */
725 if (options.compression) {
726 debug("Requesting compression at level %d.", options.compression_level);
728 if (options.compression_level < 1 || options.compression_level > 9)
729 fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
731 /* Send the request. */
732 packet_start(SSH_CMSG_REQUEST_COMPRESSION);
733 packet_put_int(options.compression_level);
736 type = packet_read(&plen);
737 if (type == SSH_SMSG_SUCCESS)
738 packet_start_compression(options.compression_level);
739 else if (type == SSH_SMSG_FAILURE)
740 log("Warning: Remote host refused compression.");
742 packet_disconnect("Protocol error waiting for compression response.");
744 /* Allocate a pseudo tty if appropriate. */
746 debug("Requesting pty.");
748 /* Start the packet. */
749 packet_start(SSH_CMSG_REQUEST_PTY);
751 /* Store TERM in the packet. There is no limit on the
752 length of the string. */
756 packet_put_string(cp, strlen(cp));
758 /* Store window size in the packet. */
759 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
760 memset(&ws, 0, sizeof(ws));
761 packet_put_int(ws.ws_row);
762 packet_put_int(ws.ws_col);
763 packet_put_int(ws.ws_xpixel);
764 packet_put_int(ws.ws_ypixel);
766 /* Store tty modes in the packet. */
767 tty_make_modes(fileno(stdin));
769 /* Send the packet, and wait for it to leave. */
773 /* Read response from the server. */
774 type = packet_read(&plen);
775 if (type == SSH_SMSG_SUCCESS) {
778 } else if (type == SSH_SMSG_FAILURE)
779 log("Warning: Remote host failed or refused to allocate a pseudo tty.");
781 packet_disconnect("Protocol error waiting for pty request response.");
783 /* Request X11 forwarding if enabled and DISPLAY is set. */
784 if (options.forward_x11 && getenv("DISPLAY") != NULL) {
785 char proto[512], data[512];
786 /* Get reasonable local authentication information. */
787 x11_get_proto(proto, sizeof proto, data, sizeof data);
788 /* Request forwarding with authentication spoofing. */
789 debug("Requesting X11 forwarding with authentication spoofing.");
790 x11_request_forwarding_with_spoofing(0, proto, data);
792 /* Read response from the server. */
793 type = packet_read(&plen);
794 if (type == SSH_SMSG_SUCCESS) {
796 } else if (type == SSH_SMSG_FAILURE) {
797 log("Warning: Remote host denied X11 forwarding.");
799 packet_disconnect("Protocol error waiting for X11 forwarding");
802 /* Tell the packet module whether this is an interactive session. */
803 packet_set_interactive(interactive, options.keepalives);
805 /* Clear agent forwarding if we don\'t have an agent. */
806 authfd = ssh_get_authentication_socket();
808 options.forward_agent = 0;
810 ssh_close_authentication_socket(authfd);
812 /* Request authentication agent forwarding if appropriate. */
813 if (options.forward_agent) {
814 debug("Requesting authentication agent forwarding.");
815 auth_request_forwarding();
817 /* Read response from the server. */
818 type = packet_read(&plen);
819 packet_integrity_check(plen, 0, type);
820 if (type != SSH_SMSG_SUCCESS)
821 log("Warning: Remote host denied authentication agent forwarding.");
823 /* Initiate local TCP/IP port forwardings. */
824 for (i = 0; i < options.num_local_forwards; i++) {
825 debug("Connections to local port %d forwarded to remote address %.200s:%d",
826 options.local_forwards[i].port,
827 options.local_forwards[i].host,
828 options.local_forwards[i].host_port);
829 channel_request_local_forwarding(options.local_forwards[i].port,
830 options.local_forwards[i].host,
831 options.local_forwards[i].host_port,
832 options.gateway_ports);
835 /* Initiate remote TCP/IP port forwardings. */
836 for (i = 0; i < options.num_remote_forwards; i++) {
837 debug("Connections to remote port %d forwarded to local address %.200s:%d",
838 options.remote_forwards[i].port,
839 options.remote_forwards[i].host,
840 options.remote_forwards[i].host_port);
841 channel_request_remote_forwarding(options.remote_forwards[i].port,
842 options.remote_forwards[i].host,
843 options.remote_forwards[i].host_port);
846 /* If requested, let ssh continue in the background. */
847 if (fork_after_authentication_flag)
848 if (daemon(1, 1) < 0)
849 fatal("daemon() failed: %.200s", strerror(errno));
852 * If a command was specified on the command line, execute the
853 * command now. Otherwise request the server to start a shell.
855 if (buffer_len(&command) > 0) {
856 int len = buffer_len(&command);
859 debug("Sending command: %.*s", len, buffer_ptr(&command));
860 packet_start(SSH_CMSG_EXEC_CMD);
861 packet_put_string(buffer_ptr(&command), buffer_len(&command));
865 debug("Requesting shell.");
866 packet_start(SSH_CMSG_EXEC_SHELL);
871 /* Enter the interactive session. */
872 return client_loop(have_tty, tty_flag ? options.escape_char : -1);
879 /* Initiate local TCP/IP port forwardings. */
880 for (i = 0; i < options.num_local_forwards; i++) {
881 debug("Connections to local port %d forwarded to remote address %.200s:%d",
882 options.local_forwards[i].port,
883 options.local_forwards[i].host,
884 options.local_forwards[i].host_port);
885 channel_request_local_forwarding(options.local_forwards[i].port,
886 options.local_forwards[i].host,
887 options.local_forwards[i].host_port,
888 options.gateway_ports);
892 extern void client_set_session_ident(int id);
895 client_init(int id, void *arg)
898 debug("client_init id %d arg %d", id, (int)arg);
909 /* Store window size in the packet. */
910 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
911 memset(&ws, 0, sizeof(ws));
913 channel_request_start(id, "pty-req", 0);
914 packet_put_cstring(cp);
915 packet_put_int(ws.ws_col);
916 packet_put_int(ws.ws_row);
917 packet_put_int(ws.ws_xpixel);
918 packet_put_int(ws.ws_ypixel);
919 packet_put_cstring(""); /* XXX: encode terminal modes */
921 /* XXX wait for reply */
923 if (options.forward_x11 &&
924 getenv("DISPLAY") != NULL) {
925 char proto[512], data[512];
926 /* Get reasonable local authentication information. */
927 x11_get_proto(proto, sizeof proto, data, sizeof data);
928 /* Request forwarding with authentication spoofing. */
929 debug("Requesting X11 forwarding with authentication spoofing.");
930 x11_request_forwarding_with_spoofing(id, proto, data);
931 /* XXX wait for reply */
934 len = buffer_len(&command);
938 debug("Sending command: %.*s", len, buffer_ptr(&command));
939 channel_request_start(id, "exec", 0);
940 packet_put_string(buffer_ptr(&command), len);
943 channel_request(id, "shell", 0);
945 /* channel_callback(id, SSH2_MSG_OPEN_CONFIGMATION, client_init, 0); */
947 /* register different callback, etc. XXX */
948 client_set_session_ident(id);
954 int window, packetmax, id;
955 int in = dup(STDIN_FILENO);
956 int out = dup(STDOUT_FILENO);
957 int err = dup(STDERR_FILENO);
959 if (in < 0 || out < 0 || err < 0)
960 fatal("dump in/out/err failed");
962 /* should be pre-session */
967 packetmax = window/8;
970 packetmax = window/2;
974 "session", SSH_CHANNEL_OPENING, in, out, err,
975 window, packetmax, CHAN_EXTENDED_WRITE, xstrdup("client-session"));
979 channel_register_callback(id, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, client_init, (void *)0);
981 return client_loop(tty_flag, tty_flag ? options.escape_char : -1);