Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.132
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"
1.132 ! djm 62: RCSID("$OpenBSD: clientloop.c,v 1.131 2004/09/07 23:41:30 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;
595: if (options.control_master == 2) {
596: char *p, prompt[1024];
597:
598: allowed = 0;
599: snprintf(prompt, sizeof(prompt),
600: "Allow shared connection to %s? ", host);
601: p = read_passphrase(prompt, RP_USE_ASKPASS|RP_ALLOW_EOF);
602: if (p != NULL) {
603: /*
604: * Accept empty responses and responses consisting
605: * of the word "yes" as affirmative.
606: */
1.129 deraadt 607: if (*p == '\0' || *p == '\n' ||
1.127 djm 608: strcasecmp(p, "yes") == 0)
609: allowed = 1;
610: xfree(p);
611: }
612: }
1.123 djm 613:
614: unset_nonblock(client_fd);
615:
616: buffer_init(&m);
617:
1.127 djm 618: buffer_put_int(&m, allowed);
1.123 djm 619: buffer_put_int(&m, getpid());
620: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
621: error("%s: client msg_send failed", __func__);
622: close(client_fd);
1.127 djm 623: buffer_free(&m);
1.123 djm 624: return;
625: }
626: buffer_clear(&m);
627:
1.127 djm 628: if (!allowed) {
629: error("Refused control connection");
630: close(client_fd);
631: buffer_free(&m);
632: return;
633: }
634:
1.123 djm 635: if (ssh_msg_recv(client_fd, &m) == -1) {
636: error("%s: client msg_recv failed", __func__);
637: close(client_fd);
1.127 djm 638: buffer_free(&m);
1.123 djm 639: return;
640: }
641:
642: if ((ver = buffer_get_char(&m)) != 0) {
643: error("%s: wrong client version %d", __func__, ver);
644: buffer_free(&m);
645: close(client_fd);
646: return;
647: }
648:
649: cctx = xmalloc(sizeof(*cctx));
650: memset(cctx, 0, sizeof(*cctx));
651:
652: cctx->want_tty = buffer_get_int(&m);
653: cctx->want_subsys = buffer_get_int(&m);
654: cctx->term = buffer_get_string(&m, &len);
655:
656: cmd = buffer_get_string(&m, &len);
657: buffer_init(&cctx->cmd);
658: buffer_append(&cctx->cmd, cmd, strlen(cmd));
659:
1.126 djm 660: env_len = buffer_get_int(&m);
661: env_len = MIN(env_len, 4096);
662: debug3("%s: receiving %d env vars", __func__, env_len);
663: if (env_len != 0) {
664: cctx->env = xmalloc(sizeof(*cctx->env) * (env_len + 1));
665: for (i = 0; i < env_len; i++)
666: cctx->env[i] = buffer_get_string(&m, &len);
667: cctx->env[i] = NULL;
668: }
669:
1.123 djm 670: debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__,
671: cctx->want_tty, cctx->want_subsys, cmd);
672:
673: /* Gather fds from client */
674: new_fd[0] = mm_receive_fd(client_fd);
675: new_fd[1] = mm_receive_fd(client_fd);
676: new_fd[2] = mm_receive_fd(client_fd);
677:
678: debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__,
679: new_fd[0], new_fd[1], new_fd[2]);
680:
681: /* Try to pick up ttymodes from client before it goes raw */
682: if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1)
683: error("%s: tcgetattr: %s", __func__, strerror(errno));
684:
685: buffer_clear(&m);
686: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
687: error("%s: client msg_send failed", __func__);
688: close(client_fd);
689: close(new_fd[0]);
690: close(new_fd[1]);
691: close(new_fd[2]);
1.127 djm 692: buffer_free(&m);
1.123 djm 693: return;
694: }
695: buffer_free(&m);
696:
697: /* enable nonblocking unless tty */
698: if (!isatty(new_fd[0]))
699: set_nonblock(new_fd[0]);
700: if (!isatty(new_fd[1]))
701: set_nonblock(new_fd[1]);
702: if (!isatty(new_fd[2]))
703: set_nonblock(new_fd[2]);
704:
705: set_nonblock(client_fd);
706:
1.129 deraadt 707: c = channel_new("session", SSH_CHANNEL_OPENING,
1.123 djm 708: new_fd[0], new_fd[1], new_fd[2],
709: CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT,
710: CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0);
711:
712: /* XXX */
713: c->ctl_fd = client_fd;
714:
715: debug3("%s: channel_new: %d", __func__, c->self);
716:
717: channel_send_open(c->self);
718: channel_register_confirm(c->self, client_extra_session2_setup, cctx);
719: }
720:
721: static void
1.99 markus 722: process_cmdline(void)
1.97 jakob 723: {
724: void (*handler)(int);
725: char *s, *cmd;
726: u_short fwd_port, fwd_host_port;
727: char buf[1024], sfwd_port[6], sfwd_host_port[6];
1.121 djm 728: int delete = 0;
1.97 jakob 729: int local = 0;
730:
731: leave_raw_mode();
1.101 markus 732: handler = signal(SIGINT, SIG_IGN);
1.99 markus 733: cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
1.97 jakob 734: if (s == NULL)
735: goto out;
736: while (*s && isspace(*s))
737: s++;
1.121 djm 738: if (*s == '-')
739: s++; /* Skip cmdline '-', if any */
1.120 dtucker 740: if (*s == '\0')
1.97 jakob 741: goto out;
1.121 djm 742:
1.122 djm 743: if (*s == 'h' || *s == 'H' || *s == '?') {
1.121 djm 744: logit("Commands:");
745: logit(" -Lport:host:hostport Request local forward");
746: logit(" -Rport:host:hostport Request remote forward");
747: logit(" -KRhostport Cancel remote forward");
748: goto out;
749: }
750:
751: if (*s == 'K') {
752: delete = 1;
753: s++;
754: }
755: if (*s != 'L' && *s != 'R') {
1.109 itojun 756: logit("Invalid command.");
1.97 jakob 757: goto out;
758: }
1.121 djm 759: if (*s == 'L')
1.97 jakob 760: local = 1;
1.121 djm 761: if (local && delete) {
762: logit("Not supported.");
763: goto out;
764: }
765: if ((!local || delete) && !compat20) {
1.109 itojun 766: logit("Not supported for SSH protocol version 1.");
1.97 jakob 767: goto out;
768: }
1.121 djm 769:
770: s++;
1.97 jakob 771: while (*s && isspace(*s))
772: s++;
773:
1.121 djm 774: if (delete) {
775: if (sscanf(s, "%5[0-9]", sfwd_host_port) != 1) {
776: logit("Bad forwarding specification.");
777: goto out;
778: }
779: if ((fwd_host_port = a2port(sfwd_host_port)) == 0) {
780: logit("Bad forwarding port(s).");
781: goto out;
782: }
783: channel_request_rforward_cancel(fwd_host_port);
784: } else {
785: if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
786: sfwd_port, buf, sfwd_host_port) != 3 &&
787: sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
788: sfwd_port, buf, sfwd_host_port) != 3) {
789: logit("Bad forwarding specification.");
790: goto out;
791: }
792: if ((fwd_port = a2port(sfwd_port)) == 0 ||
793: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
794: logit("Bad forwarding port(s).");
1.97 jakob 795: goto out;
796: }
1.121 djm 797: if (local) {
798: if (channel_setup_local_fwd_listener(fwd_port, buf,
799: fwd_host_port, options.gateway_ports) < 0) {
800: logit("Port forwarding failed.");
801: goto out;
802: }
803: } else
804: channel_request_remote_forwarding(fwd_port, buf,
805: fwd_host_port);
806: logit("Forwarding port.");
807: }
808:
1.97 jakob 809: out:
810: signal(SIGINT, handler);
811: enter_raw_mode();
812: if (cmd)
813: xfree(cmd);
814: }
815:
1.31 markus 816: /* process the characters one by one */
1.77 itojun 817: static int
1.31 markus 818: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
819: {
1.32 markus 820: char string[1024];
1.31 markus 821: pid_t pid;
822: int bytes = 0;
1.42 markus 823: u_int i;
824: u_char ch;
1.31 markus 825: char *s;
826:
827: for (i = 0; i < len; i++) {
828: /* Get one character at a time. */
829: ch = buf[i];
830:
831: if (escape_pending) {
832: /* We have previously seen an escape character. */
833: /* Clear the flag now. */
834: escape_pending = 0;
835:
836: /* Process the escaped character. */
837: switch (ch) {
838: case '.':
839: /* Terminate the connection. */
1.32 markus 840: snprintf(string, sizeof string, "%c.\r\n", escape_char);
841: buffer_append(berr, string, strlen(string));
1.31 markus 842:
843: quit_pending = 1;
844: return -1;
845:
846: case 'Z' - 64:
847: /* Suspend the program. */
848: /* Print a message to that effect to the user. */
1.32 markus 849: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
850: buffer_append(berr, string, strlen(string));
1.31 markus 851:
852: /* Restore terminal modes and suspend. */
853: client_suspend_self(bin, bout, berr);
854:
855: /* We have been continued. */
856: continue;
857:
1.111 markus 858: case 'B':
859: if (compat20) {
860: snprintf(string, sizeof string,
861: "%cB\r\n", escape_char);
862: buffer_append(berr, string,
863: strlen(string));
864: channel_request_start(session_ident,
865: "break", 0);
866: packet_put_int(1000);
867: packet_send();
868: }
869: continue;
870:
1.54 markus 871: case 'R':
1.59 markus 872: if (compat20) {
873: if (datafellows & SSH_BUG_NOREKEY)
1.109 itojun 874: logit("Server does not support re-keying");
1.59 markus 875: else
876: need_rekeying = 1;
877: }
1.54 markus 878: continue;
879:
1.31 markus 880: case '&':
881: /*
882: * Detach the program (continue to serve connections,
883: * but put in background and no more new connections).
884: */
885: /* Restore tty modes. */
886: leave_raw_mode();
887:
888: /* Stop listening for new connections. */
1.86 markus 889: channel_stop_listening();
1.31 markus 890:
1.86 markus 891: snprintf(string, sizeof string,
892: "%c& [backgrounded]\n", escape_char);
893: buffer_append(berr, string, strlen(string));
1.31 markus 894:
895: /* Fork into background. */
896: pid = fork();
897: if (pid < 0) {
898: error("fork: %.100s", strerror(errno));
899: continue;
900: }
901: if (pid != 0) { /* This is the parent. */
902: /* The parent just exits. */
903: exit(0);
904: }
905: /* The child continues serving connections. */
1.86 markus 906: if (compat20) {
907: buffer_append(bin, "\004", 1);
908: /* fake EOF on stdin */
909: return -1;
910: } else if (!stdin_eof) {
911: /*
912: * Sending SSH_CMSG_EOF alone does not always appear
913: * to be enough. So we try to send an EOF character
914: * first.
915: */
916: packet_start(SSH_CMSG_STDIN_DATA);
917: packet_put_string("\004", 1);
918: packet_send();
919: /* Close stdin. */
920: stdin_eof = 1;
921: if (buffer_len(bin) == 0) {
922: packet_start(SSH_CMSG_EOF);
923: packet_send();
924: }
925: }
926: continue;
1.31 markus 927:
928: case '?':
1.32 markus 929: snprintf(string, sizeof string,
1.31 markus 930: "%c?\r\n\
931: Supported escape sequences:\r\n\
1.104 stevesk 932: %c. - terminate connection\r\n\
1.111 markus 933: %cB - send a BREAK to the remote system\r\n\
1.104 stevesk 934: %cC - open a command line\r\n\
935: %cR - Request rekey (SSH protocol 2 only)\r\n\
936: %c^Z - suspend ssh\r\n\
937: %c# - list forwarded connections\r\n\
938: %c& - background ssh (when waiting for connections to terminate)\r\n\
939: %c? - this message\r\n\
940: %c%c - send the escape character by typing it twice\r\n\
1.31 markus 941: (Note that escapes are only recognized immediately after newline.)\r\n",
1.104 stevesk 942: escape_char, escape_char, escape_char, escape_char,
943: escape_char, escape_char, escape_char, escape_char,
1.111 markus 944: escape_char, escape_char, escape_char);
1.32 markus 945: buffer_append(berr, string, strlen(string));
1.31 markus 946: continue;
947:
948: case '#':
1.32 markus 949: snprintf(string, sizeof string, "%c#\r\n", escape_char);
950: buffer_append(berr, string, strlen(string));
1.31 markus 951: s = channel_open_message();
952: buffer_append(berr, s, strlen(s));
953: xfree(s);
1.97 jakob 954: continue;
955:
956: case 'C':
1.99 markus 957: process_cmdline();
1.31 markus 958: continue;
959:
960: default:
961: if (ch != escape_char) {
962: buffer_put_char(bin, escape_char);
963: bytes++;
964: }
965: /* Escaped characters fall through here */
966: break;
967: }
968: } else {
969: /*
970: * The previous character was not an escape char. Check if this
971: * is an escape.
972: */
973: if (last_was_cr && ch == escape_char) {
974: /* It is. Set the flag and continue to next character. */
975: escape_pending = 1;
976: continue;
977: }
978: }
979:
980: /*
981: * Normal character. Record whether it was a newline,
982: * and append it to the buffer.
983: */
984: last_was_cr = (ch == '\r' || ch == '\n');
985: buffer_put_char(bin, ch);
986: bytes++;
987: }
988: return bytes;
989: }
990:
1.77 itojun 991: static void
1.17 markus 992: client_process_input(fd_set * readset)
993: {
1.21 deraadt 994: int len;
1.31 markus 995: char buf[8192];
1.16 markus 996:
1.11 markus 997: /* Read input from stdin. */
998: if (FD_ISSET(fileno(stdin), readset)) {
999: /* Read as much as possible. */
1000: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 1001: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1002: return; /* we'll try again later */
1.11 markus 1003: if (len <= 0) {
1.13 markus 1004: /*
1005: * Received EOF or error. They are treated
1006: * similarly, except that an error message is printed
1007: * if it was an error condition.
1008: */
1.11 markus 1009: if (len < 0) {
1010: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
1011: buffer_append(&stderr_buffer, buf, strlen(buf));
1012: }
1013: /* Mark that we have seen EOF. */
1014: stdin_eof = 1;
1.13 markus 1015: /*
1016: * Send an EOF message to the server unless there is
1017: * data in the buffer. If there is data in the
1018: * buffer, no message will be sent now. Code
1019: * elsewhere will send the EOF when the buffer
1020: * becomes empty if stdin_eof is set.
1021: */
1.11 markus 1022: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 1023: packet_start(SSH_CMSG_EOF);
1024: packet_send();
1.11 markus 1025: }
1.72 stevesk 1026: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 1027: /*
1028: * Normal successful read, and no escape character.
1029: * Just append the data to buffer.
1030: */
1.11 markus 1031: buffer_append(&stdin_buffer, buf, len);
1032: } else {
1.13 markus 1033: /*
1034: * Normal, successful read. But we have an escape character
1035: * and have to process the characters one by one.
1036: */
1.52 markus 1037: if (process_escapes(&stdin_buffer, &stdout_buffer,
1038: &stderr_buffer, buf, len) == -1)
1.31 markus 1039: return;
1.11 markus 1040: }
1041: }
1042: }
1043:
1.77 itojun 1044: static void
1.11 markus 1045: client_process_output(fd_set * writeset)
1046: {
1047: int len;
1048: char buf[100];
1.1 deraadt 1049:
1.11 markus 1050: /* Write buffered output to stdout. */
1051: if (FD_ISSET(fileno(stdout), writeset)) {
1052: /* Write as much data as possible. */
1053: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1054: buffer_len(&stdout_buffer));
1.11 markus 1055: if (len <= 0) {
1.64 markus 1056: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1057: len = 0;
1058: else {
1.13 markus 1059: /*
1060: * An error or EOF was encountered. Put an
1061: * error message to stderr buffer.
1062: */
1.11 markus 1063: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
1064: buffer_append(&stderr_buffer, buf, strlen(buf));
1065: quit_pending = 1;
1066: return;
1067: }
1068: }
1069: /* Consume printed data from the buffer. */
1070: buffer_consume(&stdout_buffer, len);
1.57 markus 1071: stdout_bytes += len;
1.11 markus 1072: }
1073: /* Write buffered output to stderr. */
1074: if (FD_ISSET(fileno(stderr), writeset)) {
1075: /* Write as much data as possible. */
1076: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1077: buffer_len(&stderr_buffer));
1.11 markus 1078: if (len <= 0) {
1.64 markus 1079: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1080: len = 0;
1081: else {
1.13 markus 1082: /* EOF or error, but can't even print error message. */
1.11 markus 1083: quit_pending = 1;
1084: return;
1085: }
1086: }
1087: /* Consume printed characters from the buffer. */
1088: buffer_consume(&stderr_buffer, len);
1.57 markus 1089: stderr_bytes += len;
1.11 markus 1090: }
1.1 deraadt 1091: }
1092:
1.13 markus 1093: /*
1.15 markus 1094: * Get packets from the connection input buffer, and process them as long as
1095: * there are packets available.
1096: *
1097: * Any unknown packets received during the actual
1098: * session cause the session to terminate. This is
1099: * intended to make debugging easier since no
1100: * confirmations are sent. Any compatible protocol
1101: * extensions must be negotiated during the
1102: * preparatory phase.
1103: */
1104:
1.77 itojun 1105: static void
1.49 itojun 1106: client_process_buffered_input_packets(void)
1.15 markus 1107: {
1.54 markus 1108: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 1109: }
1110:
1.31 markus 1111: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 1112:
1.77 itojun 1113: static int
1.31 markus 1114: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 1115: {
1.31 markus 1116: /* XXX we assume c->extended is writeable */
1117: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 1118: }
1119:
1.77 itojun 1120: static void
1.60 markus 1121: client_channel_closed(int id, void *arg)
1122: {
1.83 markus 1123: channel_cancel_cleanup(id);
1.60 markus 1124: session_closed = 1;
1.113 markus 1125: leave_raw_mode();
1.60 markus 1126: }
1127:
1.15 markus 1128: /*
1.13 markus 1129: * Implements the interactive session with the server. This is called after
1130: * the user has been authenticated, and a command has been started on the
1.72 stevesk 1131: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
1132: * used as an escape character for terminating or suspending the session.
1.13 markus 1133: */
1.1 deraadt 1134:
1.20 markus 1135: int
1.30 markus 1136: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 1137: {
1.46 markus 1138: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 1139: double start_time, total_time;
1.130 avsm 1140: int max_fd = 0, max_fd2 = 0, len, rekeying = 0;
1141: u_int nalloc = 0;
1.11 markus 1142: char buf[100];
1143:
1144: debug("Entering interactive session.");
1145:
1146: start_time = get_current_time();
1147:
1148: /* Initialize variables. */
1149: escape_pending = 0;
1150: last_was_cr = 1;
1151: exit_status = -1;
1152: stdin_eof = 0;
1153: buffer_high = 64 * 1024;
1154: connection_in = packet_get_connection_in();
1155: connection_out = packet_get_connection_out();
1.46 markus 1156: max_fd = MAX(connection_in, connection_out);
1.123 djm 1157: if (control_fd != -1)
1158: max_fd = MAX(max_fd, control_fd);
1.46 markus 1159:
1160: if (!compat20) {
1.63 markus 1161: /* enable nonblocking unless tty */
1162: if (!isatty(fileno(stdin)))
1163: set_nonblock(fileno(stdin));
1164: if (!isatty(fileno(stdout)))
1165: set_nonblock(fileno(stdout));
1166: if (!isatty(fileno(stderr)))
1167: set_nonblock(fileno(stderr));
1.46 markus 1168: max_fd = MAX(max_fd, fileno(stdin));
1169: max_fd = MAX(max_fd, fileno(stdout));
1170: max_fd = MAX(max_fd, fileno(stderr));
1171: }
1.11 markus 1172: stdin_bytes = 0;
1173: stdout_bytes = 0;
1174: stderr_bytes = 0;
1175: quit_pending = 0;
1176: escape_char = escape_char_arg;
1177:
1178: /* Initialize buffers. */
1179: buffer_init(&stdin_buffer);
1180: buffer_init(&stdout_buffer);
1181: buffer_init(&stderr_buffer);
1182:
1.15 markus 1183: client_init_dispatch();
1184:
1.105 markus 1185: /*
1186: * Set signal handlers, (e.g. to restore non-blocking mode)
1187: * but don't overwrite SIG_IGN, matches behaviour from rsh(1)
1188: */
1.131 djm 1189: if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
1190: signal(SIGHUP, signal_handler);
1.105 markus 1191: if (signal(SIGINT, SIG_IGN) != SIG_IGN)
1192: signal(SIGINT, signal_handler);
1193: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
1194: signal(SIGQUIT, signal_handler);
1195: if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
1196: signal(SIGTERM, signal_handler);
1.132 ! djm 1197: signal(SIGWINCH, window_change_handler);
1.11 markus 1198:
1199: if (have_pty)
1200: enter_raw_mode();
1201:
1.48 markus 1202: if (compat20) {
1203: session_ident = ssh2_chan_id;
1.72 stevesk 1204: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 1205: channel_register_filter(session_ident,
1206: simple_escape_filter);
1.60 markus 1207: if (session_ident != -1)
1208: channel_register_cleanup(session_ident,
1209: client_channel_closed);
1.48 markus 1210: } else {
1211: /* Check if we should immediately send eof on stdin. */
1.16 markus 1212: client_check_initial_eof_on_stdin();
1.48 markus 1213: }
1.30 markus 1214:
1.11 markus 1215: /* Main loop of the client for the interactive session mode. */
1216: while (!quit_pending) {
1217:
1.13 markus 1218: /* Process buffered packets sent by the server. */
1.11 markus 1219: client_process_buffered_input_packets();
1220:
1.60 markus 1221: if (compat20 && session_closed && !channel_still_open())
1222: break;
1223:
1.56 markus 1224: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 1225:
1.56 markus 1226: if (rekeying) {
1227: debug("rekeying in progress");
1228: } else {
1229: /*
1230: * Make packets of buffered stdin data, and buffer
1231: * them for sending to the server.
1232: */
1233: if (!compat20)
1234: client_make_packets_from_stdin_data();
1.11 markus 1235:
1.56 markus 1236: /*
1237: * Make packets from buffered channel data, and
1238: * enqueue them for sending to the server.
1239: */
1240: if (packet_not_very_much_data_to_write())
1241: channel_output_poll();
1.11 markus 1242:
1.56 markus 1243: /*
1244: * Check if the window size has changed, and buffer a
1245: * message about it to the server if so.
1246: */
1247: client_check_window_change();
1.11 markus 1248:
1.56 markus 1249: if (quit_pending)
1250: break;
1251: }
1.13 markus 1252: /*
1253: * Wait until we have something to do (something becomes
1254: * available on one of the descriptors).
1255: */
1.81 markus 1256: max_fd2 = max_fd;
1.56 markus 1257: client_wait_until_can_do_something(&readset, &writeset,
1.81 markus 1258: &max_fd2, &nalloc, rekeying);
1.11 markus 1259:
1260: if (quit_pending)
1261: break;
1262:
1.56 markus 1263: /* Do channel operations unless rekeying in progress. */
1264: if (!rekeying) {
1265: channel_after_select(readset, writeset);
1.108 markus 1266: if (need_rekeying || packet_need_rekeying()) {
1267: debug("need rekeying");
1.56 markus 1268: xxx_kex->done = 0;
1269: kex_send_kexinit(xxx_kex);
1270: need_rekeying = 0;
1271: }
1272: }
1.11 markus 1273:
1.17 markus 1274: /* Buffer input from the connection. */
1.46 markus 1275: client_process_net_input(readset);
1.17 markus 1276:
1.123 djm 1277: /* Accept control connections. */
1278: client_process_control(readset);
1279:
1.17 markus 1280: if (quit_pending)
1281: break;
1.11 markus 1282:
1.17 markus 1283: if (!compat20) {
1284: /* Buffer data from stdin */
1.46 markus 1285: client_process_input(readset);
1.17 markus 1286: /*
1287: * Process output to stdout and stderr. Output to
1288: * the connection is processed elsewhere (above).
1289: */
1.46 markus 1290: client_process_output(writeset);
1.17 markus 1291: }
1.11 markus 1292:
1.13 markus 1293: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 1294: if (FD_ISSET(connection_out, writeset))
1.11 markus 1295: packet_write_poll();
1296: }
1.46 markus 1297: if (readset)
1298: xfree(readset);
1299: if (writeset)
1300: xfree(writeset);
1.11 markus 1301:
1302: /* Terminate the session. */
1303:
1304: /* Stop watching for window change. */
1.132 ! djm 1305: signal(SIGWINCH, SIG_DFL);
1.11 markus 1306:
1.76 markus 1307: channel_free_all();
1.11 markus 1308:
1.75 markus 1309: if (have_pty)
1310: leave_raw_mode();
1311:
1312: /* restore blocking io */
1313: if (!isatty(fileno(stdin)))
1314: unset_nonblock(fileno(stdin));
1315: if (!isatty(fileno(stdout)))
1316: unset_nonblock(fileno(stdout));
1317: if (!isatty(fileno(stderr)))
1318: unset_nonblock(fileno(stderr));
1.116 dtucker 1319:
1320: /*
1321: * If there was no shell or command requested, there will be no remote
1322: * exit status to be returned. In that case, clear error code if the
1323: * connection was deliberately terminated at this end.
1324: */
1325: if (no_shell_flag && received_signal == SIGTERM) {
1326: received_signal = 0;
1327: exit_status = 0;
1328: }
1.75 markus 1329:
1.113 markus 1330: if (received_signal)
1.89 itojun 1331: fatal("Killed by signal %d.", (int) received_signal);
1.75 markus 1332:
1.13 markus 1333: /*
1334: * In interactive mode (with pseudo tty) display a message indicating
1335: * that the connection has been closed.
1336: */
1.11 markus 1337: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
1338: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
1339: buffer_append(&stderr_buffer, buf, strlen(buf));
1340: }
1.70 markus 1341:
1.11 markus 1342: /* Output any buffered data for stdout. */
1.70 markus 1343: while (buffer_len(&stdout_buffer) > 0) {
1344: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1345: buffer_len(&stdout_buffer));
1.70 markus 1346: if (len <= 0) {
1.11 markus 1347: error("Write failed flushing stdout buffer.");
1.70 markus 1348: break;
1349: }
1.11 markus 1350: buffer_consume(&stdout_buffer, len);
1.57 markus 1351: stdout_bytes += len;
1.11 markus 1352: }
1353:
1354: /* Output any buffered data for stderr. */
1.70 markus 1355: while (buffer_len(&stderr_buffer) > 0) {
1356: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1357: buffer_len(&stderr_buffer));
1.70 markus 1358: if (len <= 0) {
1.11 markus 1359: error("Write failed flushing stderr buffer.");
1.70 markus 1360: break;
1361: }
1.11 markus 1362: buffer_consume(&stderr_buffer, len);
1.57 markus 1363: stderr_bytes += len;
1.11 markus 1364: }
1365:
1366: /* Clear and free any buffers. */
1367: memset(buf, 0, sizeof(buf));
1368: buffer_free(&stdin_buffer);
1369: buffer_free(&stdout_buffer);
1370: buffer_free(&stderr_buffer);
1371:
1372: /* Report bytes transferred, and transfer rates. */
1373: total_time = get_current_time() - start_time;
1374: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
1.90 deraadt 1375: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
1.11 markus 1376: if (total_time > 0)
1377: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
1.90 deraadt 1378: stdin_bytes / total_time, stdout_bytes / total_time,
1379: stderr_bytes / total_time);
1.11 markus 1380:
1381: /* Return the exit status of the program. */
1382: debug("Exit status %d", exit_status);
1383: return exit_status;
1.15 markus 1384: }
1385:
1386: /*********/
1387:
1.77 itojun 1388: static void
1.94 markus 1389: client_input_stdout_data(int type, u_int32_t seq, void *ctxt)
1.15 markus 1390: {
1.42 markus 1391: u_int data_len;
1.15 markus 1392: char *data = packet_get_string(&data_len);
1.93 markus 1393: packet_check_eom();
1.15 markus 1394: buffer_append(&stdout_buffer, data, data_len);
1395: memset(data, 0, data_len);
1396: xfree(data);
1397: }
1.77 itojun 1398: static void
1.94 markus 1399: client_input_stderr_data(int type, u_int32_t seq, void *ctxt)
1.15 markus 1400: {
1.42 markus 1401: u_int data_len;
1.15 markus 1402: char *data = packet_get_string(&data_len);
1.93 markus 1403: packet_check_eom();
1.15 markus 1404: buffer_append(&stderr_buffer, data, data_len);
1405: memset(data, 0, data_len);
1406: xfree(data);
1407: }
1.77 itojun 1408: static void
1.94 markus 1409: client_input_exit_status(int type, u_int32_t seq, void *ctxt)
1.15 markus 1410: {
1411: exit_status = packet_get_int();
1.93 markus 1412: packet_check_eom();
1.15 markus 1413: /* Acknowledge the exit. */
1414: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1415: packet_send();
1416: /*
1417: * Must wait for packet to be sent since we are
1418: * exiting the loop.
1419: */
1420: packet_write_wait();
1421: /* Flag that we want to exit. */
1422: quit_pending = 1;
1423: }
1.115 markus 1424: static void
1425: client_input_agent_open(int type, u_int32_t seq, void *ctxt)
1426: {
1427: Channel *c = NULL;
1428: int remote_id, sock;
1429:
1430: /* Read the remote channel number from the message. */
1431: remote_id = packet_get_int();
1432: packet_check_eom();
1433:
1434: /*
1435: * Get a connection to the local authentication agent (this may again
1436: * get forwarded).
1437: */
1438: sock = ssh_get_authentication_socket();
1439:
1440: /*
1441: * If we could not connect the agent, send an error message back to
1442: * the server. This should never happen unless the agent dies,
1443: * because authentication forwarding is only enabled if we have an
1444: * agent.
1445: */
1446: if (sock >= 0) {
1447: c = channel_new("", SSH_CHANNEL_OPEN, sock, sock,
1448: -1, 0, 0, 0, "authentication agent connection", 1);
1449: c->remote_id = remote_id;
1450: c->force_drain = 1;
1451: }
1452: if (c == NULL) {
1453: packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE);
1454: packet_put_int(remote_id);
1455: } else {
1456: /* Send a confirmation to the remote host. */
1457: debug("Forwarding authentication connection.");
1458: packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
1459: packet_put_int(remote_id);
1460: packet_put_int(c->self);
1461: }
1462: packet_send();
1463: }
1.15 markus 1464:
1.77 itojun 1465: static Channel *
1.40 markus 1466: client_request_forwarded_tcpip(const char *request_type, int rchan)
1467: {
1.103 deraadt 1468: Channel *c = NULL;
1.40 markus 1469: char *listen_address, *originator_address;
1470: int listen_port, originator_port;
1.67 markus 1471: int sock;
1.40 markus 1472:
1473: /* Get rest of the packet */
1474: listen_address = packet_get_string(NULL);
1475: listen_port = packet_get_int();
1476: originator_address = packet_get_string(NULL);
1477: originator_port = packet_get_int();
1.93 markus 1478: packet_check_eom();
1.40 markus 1479:
1480: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1481: listen_address, listen_port, originator_address, originator_port);
1482:
1.80 stevesk 1483: sock = channel_connect_by_listen_address(listen_port);
1.67 markus 1484: if (sock < 0) {
1485: xfree(originator_address);
1486: xfree(listen_address);
1487: return NULL;
1488: }
1489: c = channel_new("forwarded-tcpip",
1490: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1491: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1492: originator_address, 1);
1.40 markus 1493: xfree(originator_address);
1494: xfree(listen_address);
1495: return c;
1496: }
1497:
1.103 deraadt 1498: static Channel *
1.40 markus 1499: client_request_x11(const char *request_type, int rchan)
1500: {
1501: Channel *c = NULL;
1502: char *originator;
1503: int originator_port;
1.67 markus 1504: int sock;
1.40 markus 1505:
1506: if (!options.forward_x11) {
1507: error("Warning: ssh server tried X11 forwarding.");
1508: error("Warning: this is probably a break in attempt by a malicious server.");
1509: return NULL;
1510: }
1511: originator = packet_get_string(NULL);
1512: if (datafellows & SSH_BUG_X11FWD) {
1513: debug2("buggy server: x11 request w/o originator_port");
1514: originator_port = 0;
1515: } else {
1516: originator_port = packet_get_int();
1517: }
1.93 markus 1518: packet_check_eom();
1.40 markus 1519: /* XXX check permission */
1.47 markus 1520: debug("client_request_x11: request from %s %d", originator,
1521: originator_port);
1.67 markus 1522: xfree(originator);
1.40 markus 1523: sock = x11_connect_display();
1.67 markus 1524: if (sock < 0)
1525: return NULL;
1526: c = channel_new("x11",
1527: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1.110 markus 1528: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
1.82 markus 1529: c->force_drain = 1;
1.40 markus 1530: return c;
1531: }
1532:
1.103 deraadt 1533: static Channel *
1.40 markus 1534: client_request_agent(const char *request_type, int rchan)
1535: {
1536: Channel *c = NULL;
1.67 markus 1537: int sock;
1.40 markus 1538:
1539: if (!options.forward_agent) {
1540: error("Warning: ssh server tried agent forwarding.");
1541: error("Warning: this is probably a break in attempt by a malicious server.");
1542: return NULL;
1543: }
1544: sock = ssh_get_authentication_socket();
1.67 markus 1545: if (sock < 0)
1546: return NULL;
1547: c = channel_new("authentication agent connection",
1548: SSH_CHANNEL_OPEN, sock, sock, -1,
1549: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1550: "authentication agent connection", 1);
1.82 markus 1551: c->force_drain = 1;
1.40 markus 1552: return c;
1553: }
1554:
1.22 markus 1555: /* XXXX move to generic input handler */
1.77 itojun 1556: static void
1.94 markus 1557: client_input_channel_open(int type, u_int32_t seq, void *ctxt)
1.22 markus 1558: {
1559: Channel *c = NULL;
1560: char *ctype;
1561: int rchan;
1.102 markus 1562: u_int rmaxpack, rwindow, len;
1.22 markus 1563:
1564: ctype = packet_get_string(&len);
1565: rchan = packet_get_int();
1566: rwindow = packet_get_int();
1567: rmaxpack = packet_get_int();
1568:
1.24 markus 1569: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1570: ctype, rchan, rwindow, rmaxpack);
1571:
1.40 markus 1572: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1573: c = client_request_forwarded_tcpip(ctype, rchan);
1574: } else if (strcmp(ctype, "x11") == 0) {
1575: c = client_request_x11(ctype, rchan);
1576: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1577: c = client_request_agent(ctype, rchan);
1.22 markus 1578: }
1579: /* XXX duplicate : */
1580: if (c != NULL) {
1581: debug("confirm %s", ctype);
1582: c->remote_id = rchan;
1583: c->remote_window = rwindow;
1584: c->remote_maxpacket = rmaxpack;
1.69 markus 1585: if (c->type != SSH_CHANNEL_CONNECTING) {
1586: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1587: packet_put_int(c->remote_id);
1588: packet_put_int(c->self);
1589: packet_put_int(c->local_window);
1590: packet_put_int(c->local_maxpacket);
1591: packet_send();
1592: }
1.22 markus 1593: } else {
1594: debug("failure %s", ctype);
1595: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1596: packet_put_int(rchan);
1597: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1598: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1599: packet_put_cstring("open failed");
1.66 markus 1600: packet_put_cstring("");
1601: }
1.22 markus 1602: packet_send();
1603: }
1604: xfree(ctype);
1605: }
1.77 itojun 1606: static void
1.94 markus 1607: client_input_channel_req(int type, u_int32_t seq, void *ctxt)
1.48 markus 1608: {
1609: Channel *c = NULL;
1.123 djm 1610: int exitval, id, reply, success = 0;
1.48 markus 1611: char *rtype;
1612:
1613: id = packet_get_int();
1614: rtype = packet_get_string(NULL);
1615: reply = packet_get_char();
1616:
1617: debug("client_input_channel_req: channel %d rtype %s reply %d",
1618: id, rtype, reply);
1619:
1.128 djm 1620: if (id == -1) {
1621: error("client_input_channel_req: request for channel -1");
1622: } else if ((c = channel_lookup(id)) == NULL) {
1.48 markus 1623: error("client_input_channel_req: channel %d: unknown channel", id);
1624: } else if (strcmp(rtype, "exit-status") == 0) {
1.123 djm 1625: exitval = packet_get_int();
1626: if (id == session_ident) {
1627: success = 1;
1628: exit_status = exitval;
1629: } else if (c->ctl_fd == -1) {
1630: error("client_input_channel_req: unexpected channel %d",
1631: session_ident);
1632: } else {
1633: atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
1634: success = 1;
1635: }
1.93 markus 1636: packet_check_eom();
1.48 markus 1637: }
1638: if (reply) {
1639: packet_start(success ?
1640: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1.128 djm 1641: packet_put_int(id);
1.48 markus 1642: packet_send();
1643: }
1644: xfree(rtype);
1645: }
1.95 markus 1646: static void
1647: client_input_global_request(int type, u_int32_t seq, void *ctxt)
1648: {
1649: char *rtype;
1650: int want_reply;
1651: int success = 0;
1652:
1653: rtype = packet_get_string(NULL);
1654: want_reply = packet_get_char();
1.117 markus 1655: debug("client_input_global_request: rtype %s want_reply %d",
1656: rtype, want_reply);
1.95 markus 1657: if (want_reply) {
1658: packet_start(success ?
1659: SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1660: packet_send();
1661: packet_write_wait();
1662: }
1663: xfree(rtype);
1664: }
1.22 markus 1665:
1.123 djm 1666: void
1.129 deraadt 1667: client_session2_setup(int id, int want_tty, int want_subsystem,
1.126 djm 1668: const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env,
1.123 djm 1669: dispatch_fn *subsys_repl)
1670: {
1671: int len;
1.132 ! djm 1672: Channel *c = NULL;
1.123 djm 1673:
1674: debug2("%s: id %d", __func__, id);
1675:
1.132 ! djm 1676: if ((c = channel_lookup(id)) == NULL)
! 1677: fatal("client_session2_setup: channel %d: unknown channel", id);
! 1678:
1.123 djm 1679: if (want_tty) {
1680: struct winsize ws;
1681: struct termios tio;
1682:
1683: /* Store window size in the packet. */
1684: if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
1685: memset(&ws, 0, sizeof(ws));
1686:
1687: channel_request_start(id, "pty-req", 0);
1688: packet_put_cstring(term != NULL ? term : "");
1689: packet_put_int(ws.ws_col);
1690: packet_put_int(ws.ws_row);
1691: packet_put_int(ws.ws_xpixel);
1692: packet_put_int(ws.ws_ypixel);
1693: tio = get_saved_tio();
1694: tty_make_modes(-1, tiop != NULL ? tiop : &tio);
1695: packet_send();
1696: /* XXX wait for reply */
1.132 ! djm 1697: c->client_tty = 1;
1.123 djm 1698: }
1699:
1700: /* Transfer any environment variables from client to server */
1.126 djm 1701: if (options.num_send_env != 0 && env != NULL) {
1.123 djm 1702: int i, j, matched;
1703: char *name, *val;
1704:
1705: debug("Sending environment.");
1.126 djm 1706: for (i = 0; env[i] != NULL; i++) {
1.123 djm 1707: /* Split */
1.126 djm 1708: name = xstrdup(env[i]);
1.123 djm 1709: if ((val = strchr(name, '=')) == NULL) {
1710: free(name);
1711: continue;
1712: }
1713: *val++ = '\0';
1714:
1715: matched = 0;
1716: for (j = 0; j < options.num_send_env; j++) {
1717: if (match_pattern(name, options.send_env[j])) {
1718: matched = 1;
1719: break;
1720: }
1721: }
1722: if (!matched) {
1723: debug3("Ignored env %s", name);
1724: free(name);
1725: continue;
1726: }
1727:
1728: debug("Sending env %s = %s", name, val);
1729: channel_request_start(id, "env", 0);
1730: packet_put_cstring(name);
1731: packet_put_cstring(val);
1732: packet_send();
1733: free(name);
1734: }
1735: }
1736:
1737: len = buffer_len(cmd);
1738: if (len > 0) {
1739: if (len > 900)
1740: len = 900;
1741: if (want_subsystem) {
1742: debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd));
1743: channel_request_start(id, "subsystem", subsys_repl != NULL);
1744: if (subsys_repl != NULL) {
1745: /* register callback for reply */
1746: /* XXX we assume that client_loop has already been called */
1747: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl);
1748: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl);
1749: }
1750: } else {
1751: debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd));
1752: channel_request_start(id, "exec", 0);
1753: }
1754: packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
1755: packet_send();
1756: } else {
1757: channel_request_start(id, "shell", 0);
1758: packet_send();
1759: }
1760: }
1761:
1.77 itojun 1762: static void
1.49 itojun 1763: client_init_dispatch_20(void)
1.16 markus 1764: {
1.55 markus 1765: dispatch_init(&dispatch_protocol_error);
1.100 markus 1766:
1.16 markus 1767: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1768: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1769: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1770: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1771: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1772: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1773: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1774: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1775: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.95 markus 1776: dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
1.55 markus 1777:
1778: /* rekeying */
1779: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.100 markus 1780:
1781: /* global request reply messages */
1782: dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
1783: dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
1.16 markus 1784: }
1.77 itojun 1785: static void
1.49 itojun 1786: client_init_dispatch_13(void)
1.15 markus 1787: {
1788: dispatch_init(NULL);
1789: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1790: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1791: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1792: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1793: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1794: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1795: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1796: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1797: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1798:
1799: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1.115 markus 1800: &client_input_agent_open : &deny_input_open);
1.39 markus 1801: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1802: &x11_input_open : &deny_input_open);
1.15 markus 1803: }
1.77 itojun 1804: static void
1.49 itojun 1805: client_init_dispatch_15(void)
1.15 markus 1806: {
1807: client_init_dispatch_13();
1808: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1809: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1810: }
1.79 stevesk 1811: static void
1.49 itojun 1812: client_init_dispatch(void)
1.15 markus 1813: {
1.16 markus 1814: if (compat20)
1815: client_init_dispatch_20();
1816: else if (compat13)
1.15 markus 1817: client_init_dispatch_13();
1818: else
1819: client_init_dispatch_15();
1.113 markus 1820: }
1821:
1822: /* client specific fatal cleanup */
1823: void
1.114 markus 1824: cleanup_exit(int i)
1.113 markus 1825: {
1826: leave_raw_mode();
1827: leave_non_blocking();
1.123 djm 1828: if (options.control_path != NULL && control_fd != -1)
1829: unlink(options.control_path);
1.114 markus 1830: _exit(i);
1.1 deraadt 1831: }
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