Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.133
1.1 deraadt 1: /*
1.12 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.33 deraadt 5: * The main loop for the interactive session (client side).
1.20 markus 6: *
1.33 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
12: *
13: *
14: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.20 markus 35: *
36: *
1.33 deraadt 37: * SSH2 support added by Markus Friedl.
1.78 markus 38: * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved.
1.20 markus 39: *
1.33 deraadt 40: * Redistribution and use in source and binary forms, with or without
41: * modification, are permitted provided that the following conditions
42: * are met:
43: * 1. Redistributions of source code must retain the above copyright
44: * notice, this list of conditions and the following disclaimer.
45: * 2. Redistributions in binary form must reproduce the above copyright
46: * notice, this list of conditions and the following disclaimer in the
47: * documentation and/or other materials provided with the distribution.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
50: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
51: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
52: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
53: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
54: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
55: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
56: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
57: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
58: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.12 deraadt 59: */
1.1 deraadt 60:
61: #include "includes.h"
1.133 ! djm 62: RCSID("$OpenBSD: clientloop.c,v 1.132 2004/10/29 21:47:15 djm Exp $");
1.1 deraadt 63:
1.45 markus 64: #include "ssh.h"
65: #include "ssh1.h"
66: #include "ssh2.h"
1.1 deraadt 67: #include "xmalloc.h"
68: #include "packet.h"
69: #include "buffer.h"
1.15 markus 70: #include "compat.h"
1.74 markus 71: #include "channels.h"
1.15 markus 72: #include "dispatch.h"
1.30 markus 73: #include "buffer.h"
74: #include "bufaux.h"
1.40 markus 75: #include "key.h"
1.54 markus 76: #include "kex.h"
1.45 markus 77: #include "log.h"
78: #include "readconf.h"
79: #include "clientloop.h"
1.40 markus 80: #include "authfd.h"
1.45 markus 81: #include "atomicio.h"
1.118 deraadt 82: #include "sshpty.h"
1.63 markus 83: #include "misc.h"
1.123 djm 84: #include "monitor_fdpass.h"
85: #include "match.h"
86: #include "msg.h"
1.39 markus 87:
88: /* import options */
89: extern Options options;
90:
1.1 deraadt 91: /* Flag indicating that stdin should be redirected from /dev/null. */
92: extern int stdin_null_flag;
93:
1.116 dtucker 94: /* Flag indicating that no shell has been requested */
95: extern int no_shell_flag;
96:
1.123 djm 97: /* Control socket */
98: extern int control_fd;
99:
1.13 markus 100: /*
101: * Name of the host we are connecting to. This is the name given on the
102: * command line, or the HostName specified for the user-supplied name in a
103: * configuration file.
104: */
1.1 deraadt 105: extern char *host;
106:
1.13 markus 107: /*
108: * Flag to indicate that we have received a window change signal which has
109: * not yet been processed. This will cause a message indicating the new
110: * window size to be sent to the server a little later. This is volatile
111: * because this is updated in a signal handler.
112: */
1.88 markus 113: static volatile sig_atomic_t received_window_change_signal = 0;
114: static volatile sig_atomic_t received_signal = 0;
1.1 deraadt 115:
116: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
117: static int in_non_blocking_mode = 0;
118:
119: /* Common data for the client loop code. */
1.31 markus 120: static int quit_pending; /* Set to non-zero to quit the client loop. */
121: static int escape_char; /* Escape character. */
1.11 markus 122: static int escape_pending; /* Last character was the escape character */
123: static int last_was_cr; /* Last character was a newline. */
124: static int exit_status; /* Used to store the exit status of the command. */
125: static int stdin_eof; /* EOF has been encountered on standard error. */
126: static Buffer stdin_buffer; /* Buffer for stdin data. */
127: static Buffer stdout_buffer; /* Buffer for stdout data. */
128: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 129: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
130: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 131: static int connection_in; /* Connection to server (input). */
132: static int connection_out; /* Connection to server (output). */
1.56 markus 133: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 134: static int session_closed = 0; /* In SSH2: login session closed. */
1.117 markus 135: static int server_alive_timeouts = 0;
1.1 deraadt 136:
1.77 itojun 137: static void client_init_dispatch(void);
1.16 markus 138: int session_ident = -1;
139:
1.123 djm 140: struct confirm_ctx {
141: int want_tty;
142: int want_subsys;
143: Buffer cmd;
144: char *term;
145: struct termios tio;
1.126 djm 146: char **env;
1.123 djm 147: };
148:
1.54 markus 149: /*XXX*/
150: extern Kex *xxx_kex;
151:
1.123 djm 152: void ssh_process_session2_setup(int, int, int, Buffer *);
153:
1.1 deraadt 154: /* Restores stdin to blocking mode. */
155:
1.77 itojun 156: static void
1.49 itojun 157: leave_non_blocking(void)
1.1 deraadt 158: {
1.11 markus 159: if (in_non_blocking_mode) {
1.125 djm 160: unset_nonblock(fileno(stdin));
1.11 markus 161: in_non_blocking_mode = 0;
162: }
1.1 deraadt 163: }
164:
1.11 markus 165: /* Puts stdin terminal in non-blocking mode. */
166:
1.77 itojun 167: static void
1.49 itojun 168: enter_non_blocking(void)
1.1 deraadt 169: {
1.11 markus 170: in_non_blocking_mode = 1;
1.124 djm 171: set_nonblock(fileno(stdin));
1.1 deraadt 172: }
173:
1.13 markus 174: /*
175: * Signal handler for the window change signal (SIGWINCH). This just sets a
176: * flag indicating that the window has changed.
177: */
1.1 deraadt 178:
1.77 itojun 179: static void
1.11 markus 180: window_change_handler(int sig)
1.1 deraadt 181: {
1.11 markus 182: received_window_change_signal = 1;
183: signal(SIGWINCH, window_change_handler);
1.1 deraadt 184: }
185:
1.13 markus 186: /*
187: * Signal handler for signals that cause the program to terminate. These
188: * signals must be trapped to restore terminal modes.
189: */
1.1 deraadt 190:
1.77 itojun 191: static void
1.11 markus 192: signal_handler(int sig)
1.1 deraadt 193: {
1.75 markus 194: received_signal = sig;
195: quit_pending = 1;
1.1 deraadt 196: }
197:
1.13 markus 198: /*
199: * Returns current time in seconds from Jan 1, 1970 with the maximum
200: * available resolution.
201: */
1.1 deraadt 202:
1.77 itojun 203: static double
1.49 itojun 204: get_current_time(void)
1.1 deraadt 205: {
1.11 markus 206: struct timeval tv;
207: gettimeofday(&tv, NULL);
208: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 209: }
210:
1.13 markus 211: /*
212: * This is called when the interactive is entered. This checks if there is
213: * an EOF coming on stdin. We must check this explicitly, as select() does
214: * not appear to wake up when redirecting from /dev/null.
215: */
1.1 deraadt 216:
1.77 itojun 217: static void
1.49 itojun 218: client_check_initial_eof_on_stdin(void)
1.1 deraadt 219: {
1.11 markus 220: int len;
221: char buf[1];
1.1 deraadt 222:
1.13 markus 223: /*
224: * If standard input is to be "redirected from /dev/null", we simply
225: * mark that we have seen an EOF and send an EOF message to the
226: * server. Otherwise, we try to read a single character; it appears
227: * that for some files, such /dev/null, select() never wakes up for
228: * read for this descriptor, which means that we never get EOF. This
229: * way we will get the EOF if stdin comes from /dev/null or similar.
230: */
1.11 markus 231: if (stdin_null_flag) {
232: /* Fake EOF on stdin. */
233: debug("Sending eof.");
234: stdin_eof = 1;
235: packet_start(SSH_CMSG_EOF);
236: packet_send();
237: } else {
238: enter_non_blocking();
239:
240: /* Check for immediate EOF on stdin. */
241: len = read(fileno(stdin), buf, 1);
242: if (len == 0) {
1.13 markus 243: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 244: debug("Sending eof.");
245: stdin_eof = 1;
246: packet_start(SSH_CMSG_EOF);
247: packet_send();
248: } else if (len > 0) {
1.13 markus 249: /*
250: * Got data. We must store the data in the buffer,
251: * and also process it as an escape character if
252: * appropriate.
253: */
1.42 markus 254: if ((u_char) buf[0] == escape_char)
1.11 markus 255: escape_pending = 1;
1.52 markus 256: else
1.11 markus 257: buffer_append(&stdin_buffer, buf, 1);
258: }
259: leave_non_blocking();
260: }
1.1 deraadt 261: }
262:
263:
1.13 markus 264: /*
265: * Make packets from buffered stdin data, and buffer them for sending to the
266: * connection.
267: */
1.1 deraadt 268:
1.77 itojun 269: static void
1.49 itojun 270: client_make_packets_from_stdin_data(void)
1.1 deraadt 271: {
1.42 markus 272: u_int len;
1.1 deraadt 273:
1.11 markus 274: /* Send buffered stdin data to the server. */
275: while (buffer_len(&stdin_buffer) > 0 &&
1.90 deraadt 276: packet_not_very_much_data_to_write()) {
1.11 markus 277: len = buffer_len(&stdin_buffer);
278: /* Keep the packets at reasonable size. */
279: if (len > packet_get_maxsize())
280: len = packet_get_maxsize();
281: packet_start(SSH_CMSG_STDIN_DATA);
282: packet_put_string(buffer_ptr(&stdin_buffer), len);
283: packet_send();
284: buffer_consume(&stdin_buffer, len);
1.52 markus 285: stdin_bytes += len;
1.11 markus 286: /* If we have a pending EOF, send it now. */
287: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
288: packet_start(SSH_CMSG_EOF);
289: packet_send();
290: }
1.1 deraadt 291: }
292: }
293:
1.13 markus 294: /*
295: * Checks if the client window has changed, and sends a packet about it to
296: * the server if so. The actual change is detected elsewhere (by a software
297: * interrupt on Unix); this just checks the flag and sends a message if
298: * appropriate.
299: */
1.1 deraadt 300:
1.77 itojun 301: static void
1.49 itojun 302: client_check_window_change(void)
1.1 deraadt 303: {
1.16 markus 304: struct winsize ws;
305:
306: if (! received_window_change_signal)
307: return;
308: /** XXX race */
309: received_window_change_signal = 0;
310:
1.37 markus 311: debug2("client_check_window_change: changed");
1.16 markus 312:
313: if (compat20) {
1.123 djm 314: channel_send_window_changes();
1.16 markus 315: } else {
1.123 djm 316: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
317: return;
1.16 markus 318: packet_start(SSH_CMSG_WINDOW_SIZE);
319: packet_put_int(ws.ws_row);
320: packet_put_int(ws.ws_col);
321: packet_put_int(ws.ws_xpixel);
322: packet_put_int(ws.ws_ypixel);
323: packet_send();
1.1 deraadt 324: }
325: }
326:
1.117 markus 327: static void
328: client_global_request_reply(int type, u_int32_t seq, void *ctxt)
329: {
330: server_alive_timeouts = 0;
331: client_global_request_reply_fwd(type, seq, ctxt);
332: }
333:
334: static void
335: server_alive_check(void)
336: {
337: if (++server_alive_timeouts > options.server_alive_count_max)
338: packet_disconnect("Timeout, server not responding.");
339: packet_start(SSH2_MSG_GLOBAL_REQUEST);
340: packet_put_cstring("keepalive@openssh.com");
341: packet_put_char(1); /* boolean: want reply */
342: packet_send();
343: }
344:
1.13 markus 345: /*
346: * Waits until the client can do something (some data becomes available on
347: * one of the file descriptors).
348: */
1.77 itojun 349: static void
1.46 markus 350: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.130 avsm 351: int *maxfdp, u_int *nallocp, int rekeying)
1.11 markus 352: {
1.117 markus 353: struct timeval tv, *tvp;
354: int ret;
355:
1.46 markus 356: /* Add any selections by the channel mechanism. */
1.81 markus 357: channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying);
1.11 markus 358:
1.16 markus 359: if (!compat20) {
1.17 markus 360: /* Read from the connection, unless our buffers are full. */
1.16 markus 361: if (buffer_len(&stdout_buffer) < buffer_high &&
362: buffer_len(&stderr_buffer) < buffer_high &&
363: channel_not_very_much_buffered_data())
1.46 markus 364: FD_SET(connection_in, *readsetp);
1.17 markus 365: /*
366: * Read from stdin, unless we have seen EOF or have very much
367: * buffered data to send to the server.
368: */
369: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 370: FD_SET(fileno(stdin), *readsetp);
1.17 markus 371:
372: /* Select stdout/stderr if have data in buffer. */
373: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 374: FD_SET(fileno(stdout), *writesetp);
1.17 markus 375: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 376: FD_SET(fileno(stderr), *writesetp);
1.16 markus 377: } else {
1.71 markus 378: /* channel_prepare_select could have closed the last channel */
1.84 markus 379: if (session_closed && !channel_still_open() &&
380: !packet_have_data_to_write()) {
381: /* clear mask since we did not call select() */
1.87 markus 382: memset(*readsetp, 0, *nallocp);
383: memset(*writesetp, 0, *nallocp);
1.84 markus 384: return;
1.71 markus 385: } else {
386: FD_SET(connection_in, *readsetp);
387: }
1.16 markus 388: }
1.11 markus 389:
390: /* Select server connection if have data to write to the server. */
391: if (packet_have_data_to_write())
1.46 markus 392: FD_SET(connection_out, *writesetp);
1.11 markus 393:
1.123 djm 394: if (control_fd != -1)
395: FD_SET(control_fd, *readsetp);
396:
1.13 markus 397: /*
398: * Wait for something to happen. This will suspend the process until
399: * some selected descriptor can be read, written, or has some other
1.117 markus 400: * event pending.
1.13 markus 401: */
1.11 markus 402:
1.117 markus 403: if (options.server_alive_interval == 0 || !compat20)
404: tvp = NULL;
1.129 deraadt 405: else {
1.117 markus 406: tv.tv_sec = options.server_alive_interval;
407: tv.tv_usec = 0;
408: tvp = &tv;
409: }
410: ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp);
411: if (ret < 0) {
1.11 markus 412: char buf[100];
1.51 markus 413:
414: /*
415: * We have to clear the select masks, because we return.
416: * We have to return, because the mainloop checks for the flags
417: * set by the signal handlers.
418: */
1.87 markus 419: memset(*readsetp, 0, *nallocp);
420: memset(*writesetp, 0, *nallocp);
1.50 deraadt 421:
1.11 markus 422: if (errno == EINTR)
423: return;
424: /* Note: we might still have data in the buffers. */
425: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
426: buffer_append(&stderr_buffer, buf, strlen(buf));
427: quit_pending = 1;
1.117 markus 428: } else if (ret == 0)
429: server_alive_check();
1.11 markus 430: }
431:
1.77 itojun 432: static void
1.31 markus 433: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 434: {
1.11 markus 435: /* Flush stdout and stderr buffers. */
1.31 markus 436: if (buffer_len(bout) > 0)
1.112 deraadt 437: atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
1.31 markus 438: if (buffer_len(berr) > 0)
1.112 deraadt 439: atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 440:
441: leave_raw_mode();
442:
1.13 markus 443: /*
444: * Free (and clear) the buffer to reduce the amount of data that gets
445: * written to swap.
446: */
1.31 markus 447: buffer_free(bin);
448: buffer_free(bout);
449: buffer_free(berr);
1.11 markus 450:
451: /* Send the suspend signal to the program itself. */
452: kill(getpid(), SIGTSTP);
453:
1.132 djm 454: /* Reset window sizes in case they have changed */
455: received_window_change_signal = 1;
1.11 markus 456:
457: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 458: buffer_init(bin);
459: buffer_init(bout);
460: buffer_init(berr);
1.11 markus 461:
462: enter_raw_mode();
463: }
464:
1.77 itojun 465: static void
1.17 markus 466: client_process_net_input(fd_set * readset)
1.11 markus 467: {
1.17 markus 468: int len;
469: char buf[8192];
1.11 markus 470:
1.13 markus 471: /*
472: * Read input from the server, and add any such data to the buffer of
473: * the packet subsystem.
474: */
1.11 markus 475: if (FD_ISSET(connection_in, readset)) {
476: /* Read as much as possible. */
477: len = read(connection_in, buf, sizeof(buf));
478: if (len == 0) {
479: /* Received EOF. The remote host has closed the connection. */
480: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
481: host);
1.1 deraadt 482: buffer_append(&stderr_buffer, buf, strlen(buf));
483: quit_pending = 1;
484: return;
1.11 markus 485: }
1.13 markus 486: /*
487: * There is a kernel bug on Solaris that causes select to
488: * sometimes wake up even though there is no data available.
489: */
1.53 millert 490: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 491: len = 0;
492:
493: if (len < 0) {
494: /* An error has encountered. Perhaps there is a network problem. */
495: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
496: host, strerror(errno));
497: buffer_append(&stderr_buffer, buf, strlen(buf));
498: quit_pending = 1;
499: return;
500: }
501: packet_process_incoming(buf, len);
502: }
1.17 markus 503: }
1.16 markus 504:
1.97 jakob 505: static void
1.123 djm 506: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
507: {
508: int id;
509: Channel *c;
1.129 deraadt 510:
1.123 djm 511: id = packet_get_int();
512: packet_check_eom();
513:
514: if ((c = channel_lookup(id)) == NULL) {
515: error("%s: no channel for id %d", __func__, id);
516: return;
517: }
518:
519: if (type == SSH2_MSG_CHANNEL_SUCCESS)
520: debug2("Request suceeded on channel %d", id);
521: else if (type == SSH2_MSG_CHANNEL_FAILURE) {
522: error("Request failed on channel %d", id);
523: channel_free(c);
524: }
525: }
526:
527: static void
528: client_extra_session2_setup(int id, void *arg)
529: {
530: struct confirm_ctx *cctx = arg;
531: Channel *c;
1.126 djm 532: int i;
1.129 deraadt 533:
1.123 djm 534: if (cctx == NULL)
535: fatal("%s: cctx == NULL", __func__);
536: if ((c = channel_lookup(id)) == NULL)
537: fatal("%s: no channel for id %d", __func__, id);
538:
1.129 deraadt 539: client_session2_setup(id, cctx->want_tty, cctx->want_subsys,
1.126 djm 540: cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env,
1.123 djm 541: client_subsystem_reply);
1.127 djm 542:
1.123 djm 543: c->confirm_ctx = NULL;
544: buffer_free(&cctx->cmd);
1.126 djm 545: xfree(cctx->term);
546: if (cctx->env != NULL) {
547: for (i = 0; cctx->env[i] != NULL; i++)
548: xfree(cctx->env[i]);
549: xfree(cctx->env);
1.129 deraadt 550: }
1.126 djm 551: xfree(cctx);
1.123 djm 552: }
553:
554: static void
555: client_process_control(fd_set * readset)
556: {
557: Buffer m;
558: Channel *c;
1.127 djm 559: int client_fd, new_fd[3], ver, i, allowed;
1.123 djm 560: socklen_t addrlen;
561: struct sockaddr_storage addr;
562: struct confirm_ctx *cctx;
563: char *cmd;
1.126 djm 564: u_int len, env_len;
1.123 djm 565: uid_t euid;
566: gid_t egid;
567:
568: /*
569: * Accept connection on control socket
570: */
571: if (control_fd == -1 || !FD_ISSET(control_fd, readset))
572: return;
573:
574: memset(&addr, 0, sizeof(addr));
575: addrlen = sizeof(addr);
576: if ((client_fd = accept(control_fd,
577: (struct sockaddr*)&addr, &addrlen)) == -1) {
578: error("%s accept: %s", __func__, strerror(errno));
579: return;
580: }
581:
582: if (getpeereid(client_fd, &euid, &egid) < 0) {
583: error("%s getpeereid failed: %s", __func__, strerror(errno));
584: close(client_fd);
585: return;
586: }
587: if ((euid != 0) && (getuid() != euid)) {
588: error("control mode uid mismatch: peer euid %u != uid %u",
589: (u_int) euid, (u_int) getuid());
590: close(client_fd);
591: return;
592: }
1.127 djm 593:
594: allowed = 1;
1.133 ! djm 595: if (options.control_master == 2)
! 596: allowed = ask_permission("Allow shared connection to %s? ",
! 597: host);
1.123 djm 598:
599: unset_nonblock(client_fd);
600:
601: buffer_init(&m);
602:
1.127 djm 603: buffer_put_int(&m, allowed);
1.123 djm 604: buffer_put_int(&m, getpid());
605: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
606: error("%s: client msg_send failed", __func__);
607: close(client_fd);
1.127 djm 608: buffer_free(&m);
1.123 djm 609: return;
610: }
611: buffer_clear(&m);
612:
1.127 djm 613: if (!allowed) {
614: error("Refused control connection");
615: close(client_fd);
616: buffer_free(&m);
617: return;
618: }
619:
1.123 djm 620: if (ssh_msg_recv(client_fd, &m) == -1) {
621: error("%s: client msg_recv failed", __func__);
622: close(client_fd);
1.127 djm 623: buffer_free(&m);
1.123 djm 624: return;
625: }
626:
627: if ((ver = buffer_get_char(&m)) != 0) {
628: error("%s: wrong client version %d", __func__, ver);
629: buffer_free(&m);
630: close(client_fd);
631: return;
632: }
633:
634: cctx = xmalloc(sizeof(*cctx));
635: memset(cctx, 0, sizeof(*cctx));
636:
637: cctx->want_tty = buffer_get_int(&m);
638: cctx->want_subsys = buffer_get_int(&m);
639: cctx->term = buffer_get_string(&m, &len);
640:
641: cmd = buffer_get_string(&m, &len);
642: buffer_init(&cctx->cmd);
643: buffer_append(&cctx->cmd, cmd, strlen(cmd));
644:
1.126 djm 645: env_len = buffer_get_int(&m);
646: env_len = MIN(env_len, 4096);
647: debug3("%s: receiving %d env vars", __func__, env_len);
648: if (env_len != 0) {
649: cctx->env = xmalloc(sizeof(*cctx->env) * (env_len + 1));
650: for (i = 0; i < env_len; i++)
651: cctx->env[i] = buffer_get_string(&m, &len);
652: cctx->env[i] = NULL;
653: }
654:
1.123 djm 655: debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__,
656: cctx->want_tty, cctx->want_subsys, cmd);
657:
658: /* Gather fds from client */
659: new_fd[0] = mm_receive_fd(client_fd);
660: new_fd[1] = mm_receive_fd(client_fd);
661: new_fd[2] = mm_receive_fd(client_fd);
662:
663: debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__,
664: new_fd[0], new_fd[1], new_fd[2]);
665:
666: /* Try to pick up ttymodes from client before it goes raw */
667: if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1)
668: error("%s: tcgetattr: %s", __func__, strerror(errno));
669:
670: buffer_clear(&m);
671: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
672: error("%s: client msg_send failed", __func__);
673: close(client_fd);
674: close(new_fd[0]);
675: close(new_fd[1]);
676: close(new_fd[2]);
1.127 djm 677: buffer_free(&m);
1.123 djm 678: return;
679: }
680: buffer_free(&m);
681:
682: /* enable nonblocking unless tty */
683: if (!isatty(new_fd[0]))
684: set_nonblock(new_fd[0]);
685: if (!isatty(new_fd[1]))
686: set_nonblock(new_fd[1]);
687: if (!isatty(new_fd[2]))
688: set_nonblock(new_fd[2]);
689:
690: set_nonblock(client_fd);
691:
1.129 deraadt 692: c = channel_new("session", SSH_CHANNEL_OPENING,
1.123 djm 693: new_fd[0], new_fd[1], new_fd[2],
694: CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT,
695: CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0);
696:
697: /* XXX */
698: c->ctl_fd = client_fd;
699:
700: debug3("%s: channel_new: %d", __func__, c->self);
701:
702: channel_send_open(c->self);
703: channel_register_confirm(c->self, client_extra_session2_setup, cctx);
704: }
705:
706: static void
1.99 markus 707: process_cmdline(void)
1.97 jakob 708: {
709: void (*handler)(int);
710: char *s, *cmd;
711: u_short fwd_port, fwd_host_port;
712: char buf[1024], sfwd_port[6], sfwd_host_port[6];
1.121 djm 713: int delete = 0;
1.97 jakob 714: int local = 0;
715:
716: leave_raw_mode();
1.101 markus 717: handler = signal(SIGINT, SIG_IGN);
1.99 markus 718: cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
1.97 jakob 719: if (s == NULL)
720: goto out;
721: while (*s && isspace(*s))
722: s++;
1.121 djm 723: if (*s == '-')
724: s++; /* Skip cmdline '-', if any */
1.120 dtucker 725: if (*s == '\0')
1.97 jakob 726: goto out;
1.121 djm 727:
1.122 djm 728: if (*s == 'h' || *s == 'H' || *s == '?') {
1.121 djm 729: logit("Commands:");
730: logit(" -Lport:host:hostport Request local forward");
731: logit(" -Rport:host:hostport Request remote forward");
732: logit(" -KRhostport Cancel remote forward");
733: goto out;
734: }
735:
736: if (*s == 'K') {
737: delete = 1;
738: s++;
739: }
740: if (*s != 'L' && *s != 'R') {
1.109 itojun 741: logit("Invalid command.");
1.97 jakob 742: goto out;
743: }
1.121 djm 744: if (*s == 'L')
1.97 jakob 745: local = 1;
1.121 djm 746: if (local && delete) {
747: logit("Not supported.");
748: goto out;
749: }
750: if ((!local || delete) && !compat20) {
1.109 itojun 751: logit("Not supported for SSH protocol version 1.");
1.97 jakob 752: goto out;
753: }
1.121 djm 754:
755: s++;
1.97 jakob 756: while (*s && isspace(*s))
757: s++;
758:
1.121 djm 759: if (delete) {
760: if (sscanf(s, "%5[0-9]", sfwd_host_port) != 1) {
761: logit("Bad forwarding specification.");
762: goto out;
763: }
764: if ((fwd_host_port = a2port(sfwd_host_port)) == 0) {
765: logit("Bad forwarding port(s).");
766: goto out;
767: }
768: channel_request_rforward_cancel(fwd_host_port);
769: } else {
770: if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
771: sfwd_port, buf, sfwd_host_port) != 3 &&
772: sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
773: sfwd_port, buf, sfwd_host_port) != 3) {
774: logit("Bad forwarding specification.");
775: goto out;
776: }
777: if ((fwd_port = a2port(sfwd_port)) == 0 ||
778: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
779: logit("Bad forwarding port(s).");
1.97 jakob 780: goto out;
781: }
1.121 djm 782: if (local) {
783: if (channel_setup_local_fwd_listener(fwd_port, buf,
784: fwd_host_port, options.gateway_ports) < 0) {
785: logit("Port forwarding failed.");
786: goto out;
787: }
788: } else
789: channel_request_remote_forwarding(fwd_port, buf,
790: fwd_host_port);
791: logit("Forwarding port.");
792: }
793:
1.97 jakob 794: out:
795: signal(SIGINT, handler);
796: enter_raw_mode();
797: if (cmd)
798: xfree(cmd);
799: }
800:
1.31 markus 801: /* process the characters one by one */
1.77 itojun 802: static int
1.31 markus 803: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
804: {
1.32 markus 805: char string[1024];
1.31 markus 806: pid_t pid;
807: int bytes = 0;
1.42 markus 808: u_int i;
809: u_char ch;
1.31 markus 810: char *s;
811:
812: for (i = 0; i < len; i++) {
813: /* Get one character at a time. */
814: ch = buf[i];
815:
816: if (escape_pending) {
817: /* We have previously seen an escape character. */
818: /* Clear the flag now. */
819: escape_pending = 0;
820:
821: /* Process the escaped character. */
822: switch (ch) {
823: case '.':
824: /* Terminate the connection. */
1.32 markus 825: snprintf(string, sizeof string, "%c.\r\n", escape_char);
826: buffer_append(berr, string, strlen(string));
1.31 markus 827:
828: quit_pending = 1;
829: return -1;
830:
831: case 'Z' - 64:
832: /* Suspend the program. */
833: /* Print a message to that effect to the user. */
1.32 markus 834: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
835: buffer_append(berr, string, strlen(string));
1.31 markus 836:
837: /* Restore terminal modes and suspend. */
838: client_suspend_self(bin, bout, berr);
839:
840: /* We have been continued. */
841: continue;
842:
1.111 markus 843: case 'B':
844: if (compat20) {
845: snprintf(string, sizeof string,
846: "%cB\r\n", escape_char);
847: buffer_append(berr, string,
848: strlen(string));
849: channel_request_start(session_ident,
850: "break", 0);
851: packet_put_int(1000);
852: packet_send();
853: }
854: continue;
855:
1.54 markus 856: case 'R':
1.59 markus 857: if (compat20) {
858: if (datafellows & SSH_BUG_NOREKEY)
1.109 itojun 859: logit("Server does not support re-keying");
1.59 markus 860: else
861: need_rekeying = 1;
862: }
1.54 markus 863: continue;
864:
1.31 markus 865: case '&':
866: /*
867: * Detach the program (continue to serve connections,
868: * but put in background and no more new connections).
869: */
870: /* Restore tty modes. */
871: leave_raw_mode();
872:
873: /* Stop listening for new connections. */
1.86 markus 874: channel_stop_listening();
1.31 markus 875:
1.86 markus 876: snprintf(string, sizeof string,
877: "%c& [backgrounded]\n", escape_char);
878: buffer_append(berr, string, strlen(string));
1.31 markus 879:
880: /* Fork into background. */
881: pid = fork();
882: if (pid < 0) {
883: error("fork: %.100s", strerror(errno));
884: continue;
885: }
886: if (pid != 0) { /* This is the parent. */
887: /* The parent just exits. */
888: exit(0);
889: }
890: /* The child continues serving connections. */
1.86 markus 891: if (compat20) {
892: buffer_append(bin, "\004", 1);
893: /* fake EOF on stdin */
894: return -1;
895: } else if (!stdin_eof) {
896: /*
897: * Sending SSH_CMSG_EOF alone does not always appear
898: * to be enough. So we try to send an EOF character
899: * first.
900: */
901: packet_start(SSH_CMSG_STDIN_DATA);
902: packet_put_string("\004", 1);
903: packet_send();
904: /* Close stdin. */
905: stdin_eof = 1;
906: if (buffer_len(bin) == 0) {
907: packet_start(SSH_CMSG_EOF);
908: packet_send();
909: }
910: }
911: continue;
1.31 markus 912:
913: case '?':
1.32 markus 914: snprintf(string, sizeof string,
1.31 markus 915: "%c?\r\n\
916: Supported escape sequences:\r\n\
1.104 stevesk 917: %c. - terminate connection\r\n\
1.111 markus 918: %cB - send a BREAK to the remote system\r\n\
1.104 stevesk 919: %cC - open a command line\r\n\
920: %cR - Request rekey (SSH protocol 2 only)\r\n\
921: %c^Z - suspend ssh\r\n\
922: %c# - list forwarded connections\r\n\
923: %c& - background ssh (when waiting for connections to terminate)\r\n\
924: %c? - this message\r\n\
925: %c%c - send the escape character by typing it twice\r\n\
1.31 markus 926: (Note that escapes are only recognized immediately after newline.)\r\n",
1.104 stevesk 927: escape_char, escape_char, escape_char, escape_char,
928: escape_char, escape_char, escape_char, escape_char,
1.111 markus 929: escape_char, escape_char, escape_char);
1.32 markus 930: buffer_append(berr, string, strlen(string));
1.31 markus 931: continue;
932:
933: case '#':
1.32 markus 934: snprintf(string, sizeof string, "%c#\r\n", escape_char);
935: buffer_append(berr, string, strlen(string));
1.31 markus 936: s = channel_open_message();
937: buffer_append(berr, s, strlen(s));
938: xfree(s);
1.97 jakob 939: continue;
940:
941: case 'C':
1.99 markus 942: process_cmdline();
1.31 markus 943: continue;
944:
945: default:
946: if (ch != escape_char) {
947: buffer_put_char(bin, escape_char);
948: bytes++;
949: }
950: /* Escaped characters fall through here */
951: break;
952: }
953: } else {
954: /*
955: * The previous character was not an escape char. Check if this
956: * is an escape.
957: */
958: if (last_was_cr && ch == escape_char) {
959: /* It is. Set the flag and continue to next character. */
960: escape_pending = 1;
961: continue;
962: }
963: }
964:
965: /*
966: * Normal character. Record whether it was a newline,
967: * and append it to the buffer.
968: */
969: last_was_cr = (ch == '\r' || ch == '\n');
970: buffer_put_char(bin, ch);
971: bytes++;
972: }
973: return bytes;
974: }
975:
1.77 itojun 976: static void
1.17 markus 977: client_process_input(fd_set * readset)
978: {
1.21 deraadt 979: int len;
1.31 markus 980: char buf[8192];
1.16 markus 981:
1.11 markus 982: /* Read input from stdin. */
983: if (FD_ISSET(fileno(stdin), readset)) {
984: /* Read as much as possible. */
985: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 986: if (len < 0 && (errno == EAGAIN || errno == EINTR))
987: return; /* we'll try again later */
1.11 markus 988: if (len <= 0) {
1.13 markus 989: /*
990: * Received EOF or error. They are treated
991: * similarly, except that an error message is printed
992: * if it was an error condition.
993: */
1.11 markus 994: if (len < 0) {
995: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
996: buffer_append(&stderr_buffer, buf, strlen(buf));
997: }
998: /* Mark that we have seen EOF. */
999: stdin_eof = 1;
1.13 markus 1000: /*
1001: * Send an EOF message to the server unless there is
1002: * data in the buffer. If there is data in the
1003: * buffer, no message will be sent now. Code
1004: * elsewhere will send the EOF when the buffer
1005: * becomes empty if stdin_eof is set.
1006: */
1.11 markus 1007: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 1008: packet_start(SSH_CMSG_EOF);
1009: packet_send();
1.11 markus 1010: }
1.72 stevesk 1011: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 1012: /*
1013: * Normal successful read, and no escape character.
1014: * Just append the data to buffer.
1015: */
1.11 markus 1016: buffer_append(&stdin_buffer, buf, len);
1017: } else {
1.13 markus 1018: /*
1019: * Normal, successful read. But we have an escape character
1020: * and have to process the characters one by one.
1021: */
1.52 markus 1022: if (process_escapes(&stdin_buffer, &stdout_buffer,
1023: &stderr_buffer, buf, len) == -1)
1.31 markus 1024: return;
1.11 markus 1025: }
1026: }
1027: }
1028:
1.77 itojun 1029: static void
1.11 markus 1030: client_process_output(fd_set * writeset)
1031: {
1032: int len;
1033: char buf[100];
1.1 deraadt 1034:
1.11 markus 1035: /* Write buffered output to stdout. */
1036: if (FD_ISSET(fileno(stdout), writeset)) {
1037: /* Write as much data as possible. */
1038: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1039: buffer_len(&stdout_buffer));
1.11 markus 1040: if (len <= 0) {
1.64 markus 1041: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1042: len = 0;
1043: else {
1.13 markus 1044: /*
1045: * An error or EOF was encountered. Put an
1046: * error message to stderr buffer.
1047: */
1.11 markus 1048: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
1049: buffer_append(&stderr_buffer, buf, strlen(buf));
1050: quit_pending = 1;
1051: return;
1052: }
1053: }
1054: /* Consume printed data from the buffer. */
1055: buffer_consume(&stdout_buffer, len);
1.57 markus 1056: stdout_bytes += len;
1.11 markus 1057: }
1058: /* Write buffered output to stderr. */
1059: if (FD_ISSET(fileno(stderr), writeset)) {
1060: /* Write as much data as possible. */
1061: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1062: buffer_len(&stderr_buffer));
1.11 markus 1063: if (len <= 0) {
1.64 markus 1064: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1065: len = 0;
1066: else {
1.13 markus 1067: /* EOF or error, but can't even print error message. */
1.11 markus 1068: quit_pending = 1;
1069: return;
1070: }
1071: }
1072: /* Consume printed characters from the buffer. */
1073: buffer_consume(&stderr_buffer, len);
1.57 markus 1074: stderr_bytes += len;
1.11 markus 1075: }
1.1 deraadt 1076: }
1077:
1.13 markus 1078: /*
1.15 markus 1079: * Get packets from the connection input buffer, and process them as long as
1080: * there are packets available.
1081: *
1082: * Any unknown packets received during the actual
1083: * session cause the session to terminate. This is
1084: * intended to make debugging easier since no
1085: * confirmations are sent. Any compatible protocol
1086: * extensions must be negotiated during the
1087: * preparatory phase.
1088: */
1089:
1.77 itojun 1090: static void
1.49 itojun 1091: client_process_buffered_input_packets(void)
1.15 markus 1092: {
1.54 markus 1093: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 1094: }
1095:
1.31 markus 1096: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 1097:
1.77 itojun 1098: static int
1.31 markus 1099: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 1100: {
1.31 markus 1101: /* XXX we assume c->extended is writeable */
1102: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 1103: }
1104:
1.77 itojun 1105: static void
1.60 markus 1106: client_channel_closed(int id, void *arg)
1107: {
1.83 markus 1108: channel_cancel_cleanup(id);
1.60 markus 1109: session_closed = 1;
1.113 markus 1110: leave_raw_mode();
1.60 markus 1111: }
1112:
1.15 markus 1113: /*
1.13 markus 1114: * Implements the interactive session with the server. This is called after
1115: * the user has been authenticated, and a command has been started on the
1.72 stevesk 1116: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
1117: * used as an escape character for terminating or suspending the session.
1.13 markus 1118: */
1.1 deraadt 1119:
1.20 markus 1120: int
1.30 markus 1121: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 1122: {
1.46 markus 1123: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 1124: double start_time, total_time;
1.130 avsm 1125: int max_fd = 0, max_fd2 = 0, len, rekeying = 0;
1126: u_int nalloc = 0;
1.11 markus 1127: char buf[100];
1128:
1129: debug("Entering interactive session.");
1130:
1131: start_time = get_current_time();
1132:
1133: /* Initialize variables. */
1134: escape_pending = 0;
1135: last_was_cr = 1;
1136: exit_status = -1;
1137: stdin_eof = 0;
1138: buffer_high = 64 * 1024;
1139: connection_in = packet_get_connection_in();
1140: connection_out = packet_get_connection_out();
1.46 markus 1141: max_fd = MAX(connection_in, connection_out);
1.123 djm 1142: if (control_fd != -1)
1143: max_fd = MAX(max_fd, control_fd);
1.46 markus 1144:
1145: if (!compat20) {
1.63 markus 1146: /* enable nonblocking unless tty */
1147: if (!isatty(fileno(stdin)))
1148: set_nonblock(fileno(stdin));
1149: if (!isatty(fileno(stdout)))
1150: set_nonblock(fileno(stdout));
1151: if (!isatty(fileno(stderr)))
1152: set_nonblock(fileno(stderr));
1.46 markus 1153: max_fd = MAX(max_fd, fileno(stdin));
1154: max_fd = MAX(max_fd, fileno(stdout));
1155: max_fd = MAX(max_fd, fileno(stderr));
1156: }
1.11 markus 1157: stdin_bytes = 0;
1158: stdout_bytes = 0;
1159: stderr_bytes = 0;
1160: quit_pending = 0;
1161: escape_char = escape_char_arg;
1162:
1163: /* Initialize buffers. */
1164: buffer_init(&stdin_buffer);
1165: buffer_init(&stdout_buffer);
1166: buffer_init(&stderr_buffer);
1167:
1.15 markus 1168: client_init_dispatch();
1169:
1.105 markus 1170: /*
1171: * Set signal handlers, (e.g. to restore non-blocking mode)
1172: * but don't overwrite SIG_IGN, matches behaviour from rsh(1)
1173: */
1.131 djm 1174: if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
1175: signal(SIGHUP, signal_handler);
1.105 markus 1176: if (signal(SIGINT, SIG_IGN) != SIG_IGN)
1177: signal(SIGINT, signal_handler);
1178: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
1179: signal(SIGQUIT, signal_handler);
1180: if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
1181: signal(SIGTERM, signal_handler);
1.132 djm 1182: signal(SIGWINCH, window_change_handler);
1.11 markus 1183:
1184: if (have_pty)
1185: enter_raw_mode();
1186:
1.48 markus 1187: if (compat20) {
1188: session_ident = ssh2_chan_id;
1.72 stevesk 1189: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 1190: channel_register_filter(session_ident,
1191: simple_escape_filter);
1.60 markus 1192: if (session_ident != -1)
1193: channel_register_cleanup(session_ident,
1194: client_channel_closed);
1.48 markus 1195: } else {
1196: /* Check if we should immediately send eof on stdin. */
1.16 markus 1197: client_check_initial_eof_on_stdin();
1.48 markus 1198: }
1.30 markus 1199:
1.11 markus 1200: /* Main loop of the client for the interactive session mode. */
1201: while (!quit_pending) {
1202:
1.13 markus 1203: /* Process buffered packets sent by the server. */
1.11 markus 1204: client_process_buffered_input_packets();
1205:
1.60 markus 1206: if (compat20 && session_closed && !channel_still_open())
1207: break;
1208:
1.56 markus 1209: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 1210:
1.56 markus 1211: if (rekeying) {
1212: debug("rekeying in progress");
1213: } else {
1214: /*
1215: * Make packets of buffered stdin data, and buffer
1216: * them for sending to the server.
1217: */
1218: if (!compat20)
1219: client_make_packets_from_stdin_data();
1.11 markus 1220:
1.56 markus 1221: /*
1222: * Make packets from buffered channel data, and
1223: * enqueue them for sending to the server.
1224: */
1225: if (packet_not_very_much_data_to_write())
1226: channel_output_poll();
1.11 markus 1227:
1.56 markus 1228: /*
1229: * Check if the window size has changed, and buffer a
1230: * message about it to the server if so.
1231: */
1232: client_check_window_change();
1.11 markus 1233:
1.56 markus 1234: if (quit_pending)
1235: break;
1236: }
1.13 markus 1237: /*
1238: * Wait until we have something to do (something becomes
1239: * available on one of the descriptors).
1240: */
1.81 markus 1241: max_fd2 = max_fd;
1.56 markus 1242: client_wait_until_can_do_something(&readset, &writeset,
1.81 markus 1243: &max_fd2, &nalloc, rekeying);
1.11 markus 1244:
1245: if (quit_pending)
1246: break;
1247:
1.56 markus 1248: /* Do channel operations unless rekeying in progress. */
1249: if (!rekeying) {
1250: channel_after_select(readset, writeset);
1.108 markus 1251: if (need_rekeying || packet_need_rekeying()) {
1252: debug("need rekeying");
1.56 markus 1253: xxx_kex->done = 0;
1254: kex_send_kexinit(xxx_kex);
1255: need_rekeying = 0;
1256: }
1257: }
1.11 markus 1258:
1.17 markus 1259: /* Buffer input from the connection. */
1.46 markus 1260: client_process_net_input(readset);
1.17 markus 1261:
1.123 djm 1262: /* Accept control connections. */
1263: client_process_control(readset);
1264:
1.17 markus 1265: if (quit_pending)
1266: break;
1.11 markus 1267:
1.17 markus 1268: if (!compat20) {
1269: /* Buffer data from stdin */
1.46 markus 1270: client_process_input(readset);
1.17 markus 1271: /*
1272: * Process output to stdout and stderr. Output to
1273: * the connection is processed elsewhere (above).
1274: */
1.46 markus 1275: client_process_output(writeset);
1.17 markus 1276: }
1.11 markus 1277:
1.13 markus 1278: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 1279: if (FD_ISSET(connection_out, writeset))
1.11 markus 1280: packet_write_poll();
1281: }
1.46 markus 1282: if (readset)
1283: xfree(readset);
1284: if (writeset)
1285: xfree(writeset);
1.11 markus 1286:
1287: /* Terminate the session. */
1288:
1289: /* Stop watching for window change. */
1.132 djm 1290: signal(SIGWINCH, SIG_DFL);
1.11 markus 1291:
1.76 markus 1292: channel_free_all();
1.11 markus 1293:
1.75 markus 1294: if (have_pty)
1295: leave_raw_mode();
1296:
1297: /* restore blocking io */
1298: if (!isatty(fileno(stdin)))
1299: unset_nonblock(fileno(stdin));
1300: if (!isatty(fileno(stdout)))
1301: unset_nonblock(fileno(stdout));
1302: if (!isatty(fileno(stderr)))
1303: unset_nonblock(fileno(stderr));
1.116 dtucker 1304:
1305: /*
1306: * If there was no shell or command requested, there will be no remote
1307: * exit status to be returned. In that case, clear error code if the
1308: * connection was deliberately terminated at this end.
1309: */
1310: if (no_shell_flag && received_signal == SIGTERM) {
1311: received_signal = 0;
1312: exit_status = 0;
1313: }
1.75 markus 1314:
1.113 markus 1315: if (received_signal)
1.89 itojun 1316: fatal("Killed by signal %d.", (int) received_signal);
1.75 markus 1317:
1.13 markus 1318: /*
1319: * In interactive mode (with pseudo tty) display a message indicating
1320: * that the connection has been closed.
1321: */
1.11 markus 1322: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
1323: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
1324: buffer_append(&stderr_buffer, buf, strlen(buf));
1325: }
1.70 markus 1326:
1.11 markus 1327: /* Output any buffered data for stdout. */
1.70 markus 1328: while (buffer_len(&stdout_buffer) > 0) {
1329: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1330: buffer_len(&stdout_buffer));
1.70 markus 1331: if (len <= 0) {
1.11 markus 1332: error("Write failed flushing stdout buffer.");
1.70 markus 1333: break;
1334: }
1.11 markus 1335: buffer_consume(&stdout_buffer, len);
1.57 markus 1336: stdout_bytes += len;
1.11 markus 1337: }
1338:
1339: /* Output any buffered data for stderr. */
1.70 markus 1340: while (buffer_len(&stderr_buffer) > 0) {
1341: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1342: buffer_len(&stderr_buffer));
1.70 markus 1343: if (len <= 0) {
1.11 markus 1344: error("Write failed flushing stderr buffer.");
1.70 markus 1345: break;
1346: }
1.11 markus 1347: buffer_consume(&stderr_buffer, len);
1.57 markus 1348: stderr_bytes += len;
1.11 markus 1349: }
1350:
1351: /* Clear and free any buffers. */
1352: memset(buf, 0, sizeof(buf));
1353: buffer_free(&stdin_buffer);
1354: buffer_free(&stdout_buffer);
1355: buffer_free(&stderr_buffer);
1356:
1357: /* Report bytes transferred, and transfer rates. */
1358: total_time = get_current_time() - start_time;
1359: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
1.90 deraadt 1360: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
1.11 markus 1361: if (total_time > 0)
1362: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
1.90 deraadt 1363: stdin_bytes / total_time, stdout_bytes / total_time,
1364: stderr_bytes / total_time);
1.11 markus 1365:
1366: /* Return the exit status of the program. */
1367: debug("Exit status %d", exit_status);
1368: return exit_status;
1.15 markus 1369: }
1370:
1371: /*********/
1372:
1.77 itojun 1373: static void
1.94 markus 1374: client_input_stdout_data(int type, u_int32_t seq, void *ctxt)
1.15 markus 1375: {
1.42 markus 1376: u_int data_len;
1.15 markus 1377: char *data = packet_get_string(&data_len);
1.93 markus 1378: packet_check_eom();
1.15 markus 1379: buffer_append(&stdout_buffer, data, data_len);
1380: memset(data, 0, data_len);
1381: xfree(data);
1382: }
1.77 itojun 1383: static void
1.94 markus 1384: client_input_stderr_data(int type, u_int32_t seq, void *ctxt)
1.15 markus 1385: {
1.42 markus 1386: u_int data_len;
1.15 markus 1387: char *data = packet_get_string(&data_len);
1.93 markus 1388: packet_check_eom();
1.15 markus 1389: buffer_append(&stderr_buffer, data, data_len);
1390: memset(data, 0, data_len);
1391: xfree(data);
1392: }
1.77 itojun 1393: static void
1.94 markus 1394: client_input_exit_status(int type, u_int32_t seq, void *ctxt)
1.15 markus 1395: {
1396: exit_status = packet_get_int();
1.93 markus 1397: packet_check_eom();
1.15 markus 1398: /* Acknowledge the exit. */
1399: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1400: packet_send();
1401: /*
1402: * Must wait for packet to be sent since we are
1403: * exiting the loop.
1404: */
1405: packet_write_wait();
1406: /* Flag that we want to exit. */
1407: quit_pending = 1;
1408: }
1.115 markus 1409: static void
1410: client_input_agent_open(int type, u_int32_t seq, void *ctxt)
1411: {
1412: Channel *c = NULL;
1413: int remote_id, sock;
1414:
1415: /* Read the remote channel number from the message. */
1416: remote_id = packet_get_int();
1417: packet_check_eom();
1418:
1419: /*
1420: * Get a connection to the local authentication agent (this may again
1421: * get forwarded).
1422: */
1423: sock = ssh_get_authentication_socket();
1424:
1425: /*
1426: * If we could not connect the agent, send an error message back to
1427: * the server. This should never happen unless the agent dies,
1428: * because authentication forwarding is only enabled if we have an
1429: * agent.
1430: */
1431: if (sock >= 0) {
1432: c = channel_new("", SSH_CHANNEL_OPEN, sock, sock,
1433: -1, 0, 0, 0, "authentication agent connection", 1);
1434: c->remote_id = remote_id;
1435: c->force_drain = 1;
1436: }
1437: if (c == NULL) {
1438: packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE);
1439: packet_put_int(remote_id);
1440: } else {
1441: /* Send a confirmation to the remote host. */
1442: debug("Forwarding authentication connection.");
1443: packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
1444: packet_put_int(remote_id);
1445: packet_put_int(c->self);
1446: }
1447: packet_send();
1448: }
1.15 markus 1449:
1.77 itojun 1450: static Channel *
1.40 markus 1451: client_request_forwarded_tcpip(const char *request_type, int rchan)
1452: {
1.103 deraadt 1453: Channel *c = NULL;
1.40 markus 1454: char *listen_address, *originator_address;
1455: int listen_port, originator_port;
1.67 markus 1456: int sock;
1.40 markus 1457:
1458: /* Get rest of the packet */
1459: listen_address = packet_get_string(NULL);
1460: listen_port = packet_get_int();
1461: originator_address = packet_get_string(NULL);
1462: originator_port = packet_get_int();
1.93 markus 1463: packet_check_eom();
1.40 markus 1464:
1465: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1466: listen_address, listen_port, originator_address, originator_port);
1467:
1.80 stevesk 1468: sock = channel_connect_by_listen_address(listen_port);
1.67 markus 1469: if (sock < 0) {
1470: xfree(originator_address);
1471: xfree(listen_address);
1472: return NULL;
1473: }
1474: c = channel_new("forwarded-tcpip",
1475: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1476: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1477: originator_address, 1);
1.40 markus 1478: xfree(originator_address);
1479: xfree(listen_address);
1480: return c;
1481: }
1482:
1.103 deraadt 1483: static Channel *
1.40 markus 1484: client_request_x11(const char *request_type, int rchan)
1485: {
1486: Channel *c = NULL;
1487: char *originator;
1488: int originator_port;
1.67 markus 1489: int sock;
1.40 markus 1490:
1491: if (!options.forward_x11) {
1492: error("Warning: ssh server tried X11 forwarding.");
1493: error("Warning: this is probably a break in attempt by a malicious server.");
1494: return NULL;
1495: }
1496: originator = packet_get_string(NULL);
1497: if (datafellows & SSH_BUG_X11FWD) {
1498: debug2("buggy server: x11 request w/o originator_port");
1499: originator_port = 0;
1500: } else {
1501: originator_port = packet_get_int();
1502: }
1.93 markus 1503: packet_check_eom();
1.40 markus 1504: /* XXX check permission */
1.47 markus 1505: debug("client_request_x11: request from %s %d", originator,
1506: originator_port);
1.67 markus 1507: xfree(originator);
1.40 markus 1508: sock = x11_connect_display();
1.67 markus 1509: if (sock < 0)
1510: return NULL;
1511: c = channel_new("x11",
1512: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1.110 markus 1513: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
1.82 markus 1514: c->force_drain = 1;
1.40 markus 1515: return c;
1516: }
1517:
1.103 deraadt 1518: static Channel *
1.40 markus 1519: client_request_agent(const char *request_type, int rchan)
1520: {
1521: Channel *c = NULL;
1.67 markus 1522: int sock;
1.40 markus 1523:
1524: if (!options.forward_agent) {
1525: error("Warning: ssh server tried agent forwarding.");
1526: error("Warning: this is probably a break in attempt by a malicious server.");
1527: return NULL;
1528: }
1529: sock = ssh_get_authentication_socket();
1.67 markus 1530: if (sock < 0)
1531: return NULL;
1532: c = channel_new("authentication agent connection",
1533: SSH_CHANNEL_OPEN, sock, sock, -1,
1534: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1535: "authentication agent connection", 1);
1.82 markus 1536: c->force_drain = 1;
1.40 markus 1537: return c;
1538: }
1539:
1.22 markus 1540: /* XXXX move to generic input handler */
1.77 itojun 1541: static void
1.94 markus 1542: client_input_channel_open(int type, u_int32_t seq, void *ctxt)
1.22 markus 1543: {
1544: Channel *c = NULL;
1545: char *ctype;
1546: int rchan;
1.102 markus 1547: u_int rmaxpack, rwindow, len;
1.22 markus 1548:
1549: ctype = packet_get_string(&len);
1550: rchan = packet_get_int();
1551: rwindow = packet_get_int();
1552: rmaxpack = packet_get_int();
1553:
1.24 markus 1554: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1555: ctype, rchan, rwindow, rmaxpack);
1556:
1.40 markus 1557: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1558: c = client_request_forwarded_tcpip(ctype, rchan);
1559: } else if (strcmp(ctype, "x11") == 0) {
1560: c = client_request_x11(ctype, rchan);
1561: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1562: c = client_request_agent(ctype, rchan);
1.22 markus 1563: }
1564: /* XXX duplicate : */
1565: if (c != NULL) {
1566: debug("confirm %s", ctype);
1567: c->remote_id = rchan;
1568: c->remote_window = rwindow;
1569: c->remote_maxpacket = rmaxpack;
1.69 markus 1570: if (c->type != SSH_CHANNEL_CONNECTING) {
1571: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1572: packet_put_int(c->remote_id);
1573: packet_put_int(c->self);
1574: packet_put_int(c->local_window);
1575: packet_put_int(c->local_maxpacket);
1576: packet_send();
1577: }
1.22 markus 1578: } else {
1579: debug("failure %s", ctype);
1580: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1581: packet_put_int(rchan);
1582: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1583: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1584: packet_put_cstring("open failed");
1.66 markus 1585: packet_put_cstring("");
1586: }
1.22 markus 1587: packet_send();
1588: }
1589: xfree(ctype);
1590: }
1.77 itojun 1591: static void
1.94 markus 1592: client_input_channel_req(int type, u_int32_t seq, void *ctxt)
1.48 markus 1593: {
1594: Channel *c = NULL;
1.123 djm 1595: int exitval, id, reply, success = 0;
1.48 markus 1596: char *rtype;
1597:
1598: id = packet_get_int();
1599: rtype = packet_get_string(NULL);
1600: reply = packet_get_char();
1601:
1602: debug("client_input_channel_req: channel %d rtype %s reply %d",
1603: id, rtype, reply);
1604:
1.128 djm 1605: if (id == -1) {
1606: error("client_input_channel_req: request for channel -1");
1607: } else if ((c = channel_lookup(id)) == NULL) {
1.48 markus 1608: error("client_input_channel_req: channel %d: unknown channel", id);
1609: } else if (strcmp(rtype, "exit-status") == 0) {
1.123 djm 1610: exitval = packet_get_int();
1611: if (id == session_ident) {
1612: success = 1;
1613: exit_status = exitval;
1614: } else if (c->ctl_fd == -1) {
1615: error("client_input_channel_req: unexpected channel %d",
1616: session_ident);
1617: } else {
1618: atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
1619: success = 1;
1620: }
1.93 markus 1621: packet_check_eom();
1.48 markus 1622: }
1623: if (reply) {
1624: packet_start(success ?
1625: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1.128 djm 1626: packet_put_int(id);
1.48 markus 1627: packet_send();
1628: }
1629: xfree(rtype);
1630: }
1.95 markus 1631: static void
1632: client_input_global_request(int type, u_int32_t seq, void *ctxt)
1633: {
1634: char *rtype;
1635: int want_reply;
1636: int success = 0;
1637:
1638: rtype = packet_get_string(NULL);
1639: want_reply = packet_get_char();
1.117 markus 1640: debug("client_input_global_request: rtype %s want_reply %d",
1641: rtype, want_reply);
1.95 markus 1642: if (want_reply) {
1643: packet_start(success ?
1644: SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1645: packet_send();
1646: packet_write_wait();
1647: }
1648: xfree(rtype);
1649: }
1.22 markus 1650:
1.123 djm 1651: void
1.129 deraadt 1652: client_session2_setup(int id, int want_tty, int want_subsystem,
1.126 djm 1653: const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env,
1.123 djm 1654: dispatch_fn *subsys_repl)
1655: {
1656: int len;
1.132 djm 1657: Channel *c = NULL;
1.123 djm 1658:
1659: debug2("%s: id %d", __func__, id);
1660:
1.132 djm 1661: if ((c = channel_lookup(id)) == NULL)
1662: fatal("client_session2_setup: channel %d: unknown channel", id);
1663:
1.123 djm 1664: if (want_tty) {
1665: struct winsize ws;
1666: struct termios tio;
1667:
1668: /* Store window size in the packet. */
1669: if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
1670: memset(&ws, 0, sizeof(ws));
1671:
1672: channel_request_start(id, "pty-req", 0);
1673: packet_put_cstring(term != NULL ? term : "");
1674: packet_put_int(ws.ws_col);
1675: packet_put_int(ws.ws_row);
1676: packet_put_int(ws.ws_xpixel);
1677: packet_put_int(ws.ws_ypixel);
1678: tio = get_saved_tio();
1679: tty_make_modes(-1, tiop != NULL ? tiop : &tio);
1680: packet_send();
1681: /* XXX wait for reply */
1.132 djm 1682: c->client_tty = 1;
1.123 djm 1683: }
1684:
1685: /* Transfer any environment variables from client to server */
1.126 djm 1686: if (options.num_send_env != 0 && env != NULL) {
1.123 djm 1687: int i, j, matched;
1688: char *name, *val;
1689:
1690: debug("Sending environment.");
1.126 djm 1691: for (i = 0; env[i] != NULL; i++) {
1.123 djm 1692: /* Split */
1.126 djm 1693: name = xstrdup(env[i]);
1.123 djm 1694: if ((val = strchr(name, '=')) == NULL) {
1695: free(name);
1696: continue;
1697: }
1698: *val++ = '\0';
1699:
1700: matched = 0;
1701: for (j = 0; j < options.num_send_env; j++) {
1702: if (match_pattern(name, options.send_env[j])) {
1703: matched = 1;
1704: break;
1705: }
1706: }
1707: if (!matched) {
1708: debug3("Ignored env %s", name);
1709: free(name);
1710: continue;
1711: }
1712:
1713: debug("Sending env %s = %s", name, val);
1714: channel_request_start(id, "env", 0);
1715: packet_put_cstring(name);
1716: packet_put_cstring(val);
1717: packet_send();
1718: free(name);
1719: }
1720: }
1721:
1722: len = buffer_len(cmd);
1723: if (len > 0) {
1724: if (len > 900)
1725: len = 900;
1726: if (want_subsystem) {
1727: debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd));
1728: channel_request_start(id, "subsystem", subsys_repl != NULL);
1729: if (subsys_repl != NULL) {
1730: /* register callback for reply */
1731: /* XXX we assume that client_loop has already been called */
1732: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl);
1733: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl);
1734: }
1735: } else {
1736: debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd));
1737: channel_request_start(id, "exec", 0);
1738: }
1739: packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
1740: packet_send();
1741: } else {
1742: channel_request_start(id, "shell", 0);
1743: packet_send();
1744: }
1745: }
1746:
1.77 itojun 1747: static void
1.49 itojun 1748: client_init_dispatch_20(void)
1.16 markus 1749: {
1.55 markus 1750: dispatch_init(&dispatch_protocol_error);
1.100 markus 1751:
1.16 markus 1752: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1753: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1754: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1755: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1756: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1757: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1758: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1759: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1760: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.95 markus 1761: dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
1.55 markus 1762:
1763: /* rekeying */
1764: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.100 markus 1765:
1766: /* global request reply messages */
1767: dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
1768: dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
1.16 markus 1769: }
1.77 itojun 1770: static void
1.49 itojun 1771: client_init_dispatch_13(void)
1.15 markus 1772: {
1773: dispatch_init(NULL);
1774: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1775: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1776: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1777: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1778: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1779: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1780: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1781: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1782: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1783:
1784: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1.115 markus 1785: &client_input_agent_open : &deny_input_open);
1.39 markus 1786: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1787: &x11_input_open : &deny_input_open);
1.15 markus 1788: }
1.77 itojun 1789: static void
1.49 itojun 1790: client_init_dispatch_15(void)
1.15 markus 1791: {
1792: client_init_dispatch_13();
1793: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1794: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1795: }
1.79 stevesk 1796: static void
1.49 itojun 1797: client_init_dispatch(void)
1.15 markus 1798: {
1.16 markus 1799: if (compat20)
1800: client_init_dispatch_20();
1801: else if (compat13)
1.15 markus 1802: client_init_dispatch_13();
1803: else
1804: client_init_dispatch_15();
1.113 markus 1805: }
1806:
1807: /* client specific fatal cleanup */
1808: void
1.114 markus 1809: cleanup_exit(int i)
1.113 markus 1810: {
1811: leave_raw_mode();
1812: leave_non_blocking();
1.123 djm 1813: if (options.control_path != NULL && control_fd != -1)
1814: unlink(options.control_path);
1.114 markus 1815: _exit(i);
1.1 deraadt 1816: }
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