Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.112.2.2
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"
1.112.2.2! brad 62: RCSID("$OpenBSD: clientloop.c,v 1.130 2004/08/11 21:43:04 avsm 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"
1.112.2.2! brad 82: #include "sshpty.h"
1.63 markus 83: #include "misc.h"
1.112.2.2! brad 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:
1.112.2.1 brad 94: /* Flag indicating that no shell has been requested */
95: extern int no_shell_flag;
96:
1.112.2.2! brad 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. */
1.112.2.1 brad 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:
1.112.2.2! brad 140: struct confirm_ctx {
! 141: int want_tty;
! 142: int want_subsys;
! 143: Buffer cmd;
! 144: char *term;
! 145: struct termios tio;
! 146: char **env;
! 147: };
! 148:
1.54 markus 149: /*XXX*/
150: extern Kex *xxx_kex;
151:
1.112.2.2! brad 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) {
1.112.2.2! brad 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;
1.112.2.2! brad 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) {
1.112.2.2! brad 314: channel_send_window_changes();
1.16 markus 315: } else {
1.112.2.2! brad 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:
1.112.2.1 brad 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,
1.112.2.2! brad 351: int *maxfdp, u_int *nallocp, int rekeying)
1.11 markus 352: {
1.112.2.1 brad 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:
1.112.2.2! brad 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
1.112.2.1 brad 400: * event pending.
1.13 markus 401: */
1.11 markus 402:
1.112.2.1 brad 403: if (options.server_alive_interval == 0 || !compat20)
404: tvp = NULL;
1.112.2.2! brad 405: else {
1.112.2.1 brad 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;
1.112.2.1 brad 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: struct winsize oldws, newws;
436:
437: /* Flush stdout and stderr buffers. */
1.31 markus 438: if (buffer_len(bout) > 0)
1.112 deraadt 439: atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
1.31 markus 440: if (buffer_len(berr) > 0)
1.112 deraadt 441: atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 442:
443: leave_raw_mode();
444:
1.13 markus 445: /*
446: * Free (and clear) the buffer to reduce the amount of data that gets
447: * written to swap.
448: */
1.31 markus 449: buffer_free(bin);
450: buffer_free(bout);
451: buffer_free(berr);
1.11 markus 452:
453: /* Save old window size. */
454: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
455:
456: /* Send the suspend signal to the program itself. */
457: kill(getpid(), SIGTSTP);
458:
459: /* Check if the window size has changed. */
460: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
461: (oldws.ws_row != newws.ws_row ||
1.90 deraadt 462: oldws.ws_col != newws.ws_col ||
463: oldws.ws_xpixel != newws.ws_xpixel ||
464: oldws.ws_ypixel != newws.ws_ypixel))
1.11 markus 465: received_window_change_signal = 1;
466:
467: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 468: buffer_init(bin);
469: buffer_init(bout);
470: buffer_init(berr);
1.11 markus 471:
472: enter_raw_mode();
473: }
474:
1.77 itojun 475: static void
1.17 markus 476: client_process_net_input(fd_set * readset)
1.11 markus 477: {
1.17 markus 478: int len;
479: char buf[8192];
1.11 markus 480:
1.13 markus 481: /*
482: * Read input from the server, and add any such data to the buffer of
483: * the packet subsystem.
484: */
1.11 markus 485: if (FD_ISSET(connection_in, readset)) {
486: /* Read as much as possible. */
487: len = read(connection_in, buf, sizeof(buf));
488: if (len == 0) {
489: /* Received EOF. The remote host has closed the connection. */
490: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
491: host);
1.1 deraadt 492: buffer_append(&stderr_buffer, buf, strlen(buf));
493: quit_pending = 1;
494: return;
1.11 markus 495: }
1.13 markus 496: /*
497: * There is a kernel bug on Solaris that causes select to
498: * sometimes wake up even though there is no data available.
499: */
1.53 millert 500: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 501: len = 0;
502:
503: if (len < 0) {
504: /* An error has encountered. Perhaps there is a network problem. */
505: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
506: host, strerror(errno));
507: buffer_append(&stderr_buffer, buf, strlen(buf));
508: quit_pending = 1;
509: return;
510: }
511: packet_process_incoming(buf, len);
512: }
1.17 markus 513: }
1.16 markus 514:
1.97 jakob 515: static void
1.112.2.2! brad 516: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
! 517: {
! 518: int id;
! 519: Channel *c;
! 520:
! 521: id = packet_get_int();
! 522: packet_check_eom();
! 523:
! 524: if ((c = channel_lookup(id)) == NULL) {
! 525: error("%s: no channel for id %d", __func__, id);
! 526: return;
! 527: }
! 528:
! 529: if (type == SSH2_MSG_CHANNEL_SUCCESS)
! 530: debug2("Request suceeded on channel %d", id);
! 531: else if (type == SSH2_MSG_CHANNEL_FAILURE) {
! 532: error("Request failed on channel %d", id);
! 533: channel_free(c);
! 534: }
! 535: }
! 536:
! 537: static void
! 538: client_extra_session2_setup(int id, void *arg)
! 539: {
! 540: struct confirm_ctx *cctx = arg;
! 541: Channel *c;
! 542: int i;
! 543:
! 544: if (cctx == NULL)
! 545: fatal("%s: cctx == NULL", __func__);
! 546: if ((c = channel_lookup(id)) == NULL)
! 547: fatal("%s: no channel for id %d", __func__, id);
! 548:
! 549: client_session2_setup(id, cctx->want_tty, cctx->want_subsys,
! 550: cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env,
! 551: client_subsystem_reply);
! 552:
! 553: c->confirm_ctx = NULL;
! 554: buffer_free(&cctx->cmd);
! 555: xfree(cctx->term);
! 556: if (cctx->env != NULL) {
! 557: for (i = 0; cctx->env[i] != NULL; i++)
! 558: xfree(cctx->env[i]);
! 559: xfree(cctx->env);
! 560: }
! 561: xfree(cctx);
! 562: }
! 563:
! 564: static void
! 565: client_process_control(fd_set * readset)
! 566: {
! 567: Buffer m;
! 568: Channel *c;
! 569: int client_fd, new_fd[3], ver, i, allowed;
! 570: socklen_t addrlen;
! 571: struct sockaddr_storage addr;
! 572: struct confirm_ctx *cctx;
! 573: char *cmd;
! 574: u_int len, env_len;
! 575: uid_t euid;
! 576: gid_t egid;
! 577:
! 578: /*
! 579: * Accept connection on control socket
! 580: */
! 581: if (control_fd == -1 || !FD_ISSET(control_fd, readset))
! 582: return;
! 583:
! 584: memset(&addr, 0, sizeof(addr));
! 585: addrlen = sizeof(addr);
! 586: if ((client_fd = accept(control_fd,
! 587: (struct sockaddr*)&addr, &addrlen)) == -1) {
! 588: error("%s accept: %s", __func__, strerror(errno));
! 589: return;
! 590: }
! 591:
! 592: if (getpeereid(client_fd, &euid, &egid) < 0) {
! 593: error("%s getpeereid failed: %s", __func__, strerror(errno));
! 594: close(client_fd);
! 595: return;
! 596: }
! 597: if ((euid != 0) && (getuid() != euid)) {
! 598: error("control mode uid mismatch: peer euid %u != uid %u",
! 599: (u_int) euid, (u_int) getuid());
! 600: close(client_fd);
! 601: return;
! 602: }
! 603:
! 604: allowed = 1;
! 605: if (options.control_master == 2) {
! 606: char *p, prompt[1024];
! 607:
! 608: allowed = 0;
! 609: snprintf(prompt, sizeof(prompt),
! 610: "Allow shared connection to %s? ", host);
! 611: p = read_passphrase(prompt, RP_USE_ASKPASS|RP_ALLOW_EOF);
! 612: if (p != NULL) {
! 613: /*
! 614: * Accept empty responses and responses consisting
! 615: * of the word "yes" as affirmative.
! 616: */
! 617: if (*p == '\0' || *p == '\n' ||
! 618: strcasecmp(p, "yes") == 0)
! 619: allowed = 1;
! 620: xfree(p);
! 621: }
! 622: }
! 623:
! 624: unset_nonblock(client_fd);
! 625:
! 626: buffer_init(&m);
! 627:
! 628: buffer_put_int(&m, allowed);
! 629: buffer_put_int(&m, getpid());
! 630: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
! 631: error("%s: client msg_send failed", __func__);
! 632: close(client_fd);
! 633: buffer_free(&m);
! 634: return;
! 635: }
! 636: buffer_clear(&m);
! 637:
! 638: if (!allowed) {
! 639: error("Refused control connection");
! 640: close(client_fd);
! 641: buffer_free(&m);
! 642: return;
! 643: }
! 644:
! 645: if (ssh_msg_recv(client_fd, &m) == -1) {
! 646: error("%s: client msg_recv failed", __func__);
! 647: close(client_fd);
! 648: buffer_free(&m);
! 649: return;
! 650: }
! 651:
! 652: if ((ver = buffer_get_char(&m)) != 0) {
! 653: error("%s: wrong client version %d", __func__, ver);
! 654: buffer_free(&m);
! 655: close(client_fd);
! 656: return;
! 657: }
! 658:
! 659: cctx = xmalloc(sizeof(*cctx));
! 660: memset(cctx, 0, sizeof(*cctx));
! 661:
! 662: cctx->want_tty = buffer_get_int(&m);
! 663: cctx->want_subsys = buffer_get_int(&m);
! 664: cctx->term = buffer_get_string(&m, &len);
! 665:
! 666: cmd = buffer_get_string(&m, &len);
! 667: buffer_init(&cctx->cmd);
! 668: buffer_append(&cctx->cmd, cmd, strlen(cmd));
! 669:
! 670: env_len = buffer_get_int(&m);
! 671: env_len = MIN(env_len, 4096);
! 672: debug3("%s: receiving %d env vars", __func__, env_len);
! 673: if (env_len != 0) {
! 674: cctx->env = xmalloc(sizeof(*cctx->env) * (env_len + 1));
! 675: for (i = 0; i < env_len; i++)
! 676: cctx->env[i] = buffer_get_string(&m, &len);
! 677: cctx->env[i] = NULL;
! 678: }
! 679:
! 680: debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__,
! 681: cctx->want_tty, cctx->want_subsys, cmd);
! 682:
! 683: /* Gather fds from client */
! 684: new_fd[0] = mm_receive_fd(client_fd);
! 685: new_fd[1] = mm_receive_fd(client_fd);
! 686: new_fd[2] = mm_receive_fd(client_fd);
! 687:
! 688: debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__,
! 689: new_fd[0], new_fd[1], new_fd[2]);
! 690:
! 691: /* Try to pick up ttymodes from client before it goes raw */
! 692: if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1)
! 693: error("%s: tcgetattr: %s", __func__, strerror(errno));
! 694:
! 695: buffer_clear(&m);
! 696: if (ssh_msg_send(client_fd, /* version */0, &m) == -1) {
! 697: error("%s: client msg_send failed", __func__);
! 698: close(client_fd);
! 699: close(new_fd[0]);
! 700: close(new_fd[1]);
! 701: close(new_fd[2]);
! 702: buffer_free(&m);
! 703: return;
! 704: }
! 705: buffer_free(&m);
! 706:
! 707: /* enable nonblocking unless tty */
! 708: if (!isatty(new_fd[0]))
! 709: set_nonblock(new_fd[0]);
! 710: if (!isatty(new_fd[1]))
! 711: set_nonblock(new_fd[1]);
! 712: if (!isatty(new_fd[2]))
! 713: set_nonblock(new_fd[2]);
! 714:
! 715: set_nonblock(client_fd);
! 716:
! 717: c = channel_new("session", SSH_CHANNEL_OPENING,
! 718: new_fd[0], new_fd[1], new_fd[2],
! 719: CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT,
! 720: CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0);
! 721:
! 722: /* XXX */
! 723: c->ctl_fd = client_fd;
! 724:
! 725: debug3("%s: channel_new: %d", __func__, c->self);
! 726:
! 727: channel_send_open(c->self);
! 728: channel_register_confirm(c->self, client_extra_session2_setup, cctx);
! 729: }
! 730:
! 731: static void
1.99 markus 732: process_cmdline(void)
1.97 jakob 733: {
734: void (*handler)(int);
735: char *s, *cmd;
736: u_short fwd_port, fwd_host_port;
737: char buf[1024], sfwd_port[6], sfwd_host_port[6];
1.112.2.2! brad 738: int delete = 0;
1.97 jakob 739: int local = 0;
740:
741: leave_raw_mode();
1.101 markus 742: handler = signal(SIGINT, SIG_IGN);
1.99 markus 743: cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
1.97 jakob 744: if (s == NULL)
745: goto out;
746: while (*s && isspace(*s))
747: s++;
1.112.2.2! brad 748: if (*s == '-')
! 749: s++; /* Skip cmdline '-', if any */
! 750: if (*s == '\0')
! 751: goto out;
! 752:
! 753: if (*s == 'h' || *s == 'H' || *s == '?') {
! 754: logit("Commands:");
! 755: logit(" -Lport:host:hostport Request local forward");
! 756: logit(" -Rport:host:hostport Request remote forward");
! 757: logit(" -KRhostport Cancel remote forward");
1.97 jakob 758: goto out;
1.112.2.2! brad 759: }
! 760:
! 761: if (*s == 'K') {
! 762: delete = 1;
! 763: s++;
! 764: }
! 765: if (*s != 'L' && *s != 'R') {
1.109 itojun 766: logit("Invalid command.");
1.97 jakob 767: goto out;
768: }
1.112.2.2! brad 769: if (*s == 'L')
1.97 jakob 770: local = 1;
1.112.2.2! brad 771: if (local && delete) {
! 772: logit("Not supported.");
! 773: goto out;
! 774: }
! 775: if ((!local || delete) && !compat20) {
1.109 itojun 776: logit("Not supported for SSH protocol version 1.");
1.97 jakob 777: goto out;
778: }
1.112.2.2! brad 779:
! 780: s++;
1.97 jakob 781: while (*s && isspace(*s))
782: s++;
783:
1.112.2.2! brad 784: if (delete) {
! 785: if (sscanf(s, "%5[0-9]", sfwd_host_port) != 1) {
! 786: logit("Bad forwarding specification.");
! 787: goto out;
! 788: }
! 789: if ((fwd_host_port = a2port(sfwd_host_port)) == 0) {
! 790: logit("Bad forwarding port(s).");
! 791: goto out;
! 792: }
! 793: channel_request_rforward_cancel(fwd_host_port);
! 794: } else {
! 795: if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
! 796: sfwd_port, buf, sfwd_host_port) != 3 &&
! 797: sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
! 798: sfwd_port, buf, sfwd_host_port) != 3) {
! 799: logit("Bad forwarding specification.");
! 800: goto out;
! 801: }
! 802: if ((fwd_port = a2port(sfwd_port)) == 0 ||
! 803: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
! 804: logit("Bad forwarding port(s).");
1.97 jakob 805: goto out;
806: }
1.112.2.2! brad 807: if (local) {
! 808: if (channel_setup_local_fwd_listener(fwd_port, buf,
! 809: fwd_host_port, options.gateway_ports) < 0) {
! 810: logit("Port forwarding failed.");
! 811: goto out;
! 812: }
! 813: } else
! 814: channel_request_remote_forwarding(fwd_port, buf,
! 815: fwd_host_port);
! 816: logit("Forwarding port.");
! 817: }
! 818:
1.97 jakob 819: out:
820: signal(SIGINT, handler);
821: enter_raw_mode();
822: if (cmd)
823: xfree(cmd);
824: }
825:
1.31 markus 826: /* process the characters one by one */
1.77 itojun 827: static int
1.31 markus 828: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
829: {
1.32 markus 830: char string[1024];
1.31 markus 831: pid_t pid;
832: int bytes = 0;
1.42 markus 833: u_int i;
834: u_char ch;
1.31 markus 835: char *s;
836:
837: for (i = 0; i < len; i++) {
838: /* Get one character at a time. */
839: ch = buf[i];
840:
841: if (escape_pending) {
842: /* We have previously seen an escape character. */
843: /* Clear the flag now. */
844: escape_pending = 0;
845:
846: /* Process the escaped character. */
847: switch (ch) {
848: case '.':
849: /* Terminate the connection. */
1.32 markus 850: snprintf(string, sizeof string, "%c.\r\n", escape_char);
851: buffer_append(berr, string, strlen(string));
1.31 markus 852:
853: quit_pending = 1;
854: return -1;
855:
856: case 'Z' - 64:
857: /* Suspend the program. */
858: /* Print a message to that effect to the user. */
1.32 markus 859: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
860: buffer_append(berr, string, strlen(string));
1.31 markus 861:
862: /* Restore terminal modes and suspend. */
863: client_suspend_self(bin, bout, berr);
864:
865: /* We have been continued. */
866: continue;
867:
1.111 markus 868: case 'B':
869: if (compat20) {
870: snprintf(string, sizeof string,
871: "%cB\r\n", escape_char);
872: buffer_append(berr, string,
873: strlen(string));
874: channel_request_start(session_ident,
875: "break", 0);
876: packet_put_int(1000);
877: packet_send();
878: }
879: continue;
880:
1.54 markus 881: case 'R':
1.59 markus 882: if (compat20) {
883: if (datafellows & SSH_BUG_NOREKEY)
1.109 itojun 884: logit("Server does not support re-keying");
1.59 markus 885: else
886: need_rekeying = 1;
887: }
1.54 markus 888: continue;
889:
1.31 markus 890: case '&':
891: /*
892: * Detach the program (continue to serve connections,
893: * but put in background and no more new connections).
894: */
895: /* Restore tty modes. */
896: leave_raw_mode();
897:
898: /* Stop listening for new connections. */
1.86 markus 899: channel_stop_listening();
1.31 markus 900:
1.86 markus 901: snprintf(string, sizeof string,
902: "%c& [backgrounded]\n", escape_char);
903: buffer_append(berr, string, strlen(string));
1.31 markus 904:
905: /* Fork into background. */
906: pid = fork();
907: if (pid < 0) {
908: error("fork: %.100s", strerror(errno));
909: continue;
910: }
911: if (pid != 0) { /* This is the parent. */
912: /* The parent just exits. */
913: exit(0);
914: }
915: /* The child continues serving connections. */
1.86 markus 916: if (compat20) {
917: buffer_append(bin, "\004", 1);
918: /* fake EOF on stdin */
919: return -1;
920: } else if (!stdin_eof) {
921: /*
922: * Sending SSH_CMSG_EOF alone does not always appear
923: * to be enough. So we try to send an EOF character
924: * first.
925: */
926: packet_start(SSH_CMSG_STDIN_DATA);
927: packet_put_string("\004", 1);
928: packet_send();
929: /* Close stdin. */
930: stdin_eof = 1;
931: if (buffer_len(bin) == 0) {
932: packet_start(SSH_CMSG_EOF);
933: packet_send();
934: }
935: }
936: continue;
1.31 markus 937:
938: case '?':
1.32 markus 939: snprintf(string, sizeof string,
1.31 markus 940: "%c?\r\n\
941: Supported escape sequences:\r\n\
1.104 stevesk 942: %c. - terminate connection\r\n\
1.111 markus 943: %cB - send a BREAK to the remote system\r\n\
1.104 stevesk 944: %cC - open a command line\r\n\
945: %cR - Request rekey (SSH protocol 2 only)\r\n\
946: %c^Z - suspend ssh\r\n\
947: %c# - list forwarded connections\r\n\
948: %c& - background ssh (when waiting for connections to terminate)\r\n\
949: %c? - this message\r\n\
950: %c%c - send the escape character by typing it twice\r\n\
1.31 markus 951: (Note that escapes are only recognized immediately after newline.)\r\n",
1.104 stevesk 952: escape_char, escape_char, escape_char, escape_char,
953: escape_char, escape_char, escape_char, escape_char,
1.111 markus 954: escape_char, escape_char, escape_char);
1.32 markus 955: buffer_append(berr, string, strlen(string));
1.31 markus 956: continue;
957:
958: case '#':
1.32 markus 959: snprintf(string, sizeof string, "%c#\r\n", escape_char);
960: buffer_append(berr, string, strlen(string));
1.31 markus 961: s = channel_open_message();
962: buffer_append(berr, s, strlen(s));
963: xfree(s);
1.97 jakob 964: continue;
965:
966: case 'C':
1.99 markus 967: process_cmdline();
1.31 markus 968: continue;
969:
970: default:
971: if (ch != escape_char) {
972: buffer_put_char(bin, escape_char);
973: bytes++;
974: }
975: /* Escaped characters fall through here */
976: break;
977: }
978: } else {
979: /*
980: * The previous character was not an escape char. Check if this
981: * is an escape.
982: */
983: if (last_was_cr && ch == escape_char) {
984: /* It is. Set the flag and continue to next character. */
985: escape_pending = 1;
986: continue;
987: }
988: }
989:
990: /*
991: * Normal character. Record whether it was a newline,
992: * and append it to the buffer.
993: */
994: last_was_cr = (ch == '\r' || ch == '\n');
995: buffer_put_char(bin, ch);
996: bytes++;
997: }
998: return bytes;
999: }
1000:
1.77 itojun 1001: static void
1.17 markus 1002: client_process_input(fd_set * readset)
1003: {
1.21 deraadt 1004: int len;
1.31 markus 1005: char buf[8192];
1.16 markus 1006:
1.11 markus 1007: /* Read input from stdin. */
1008: if (FD_ISSET(fileno(stdin), readset)) {
1009: /* Read as much as possible. */
1010: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 1011: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1012: return; /* we'll try again later */
1.11 markus 1013: if (len <= 0) {
1.13 markus 1014: /*
1015: * Received EOF or error. They are treated
1016: * similarly, except that an error message is printed
1017: * if it was an error condition.
1018: */
1.11 markus 1019: if (len < 0) {
1020: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
1021: buffer_append(&stderr_buffer, buf, strlen(buf));
1022: }
1023: /* Mark that we have seen EOF. */
1024: stdin_eof = 1;
1.13 markus 1025: /*
1026: * Send an EOF message to the server unless there is
1027: * data in the buffer. If there is data in the
1028: * buffer, no message will be sent now. Code
1029: * elsewhere will send the EOF when the buffer
1030: * becomes empty if stdin_eof is set.
1031: */
1.11 markus 1032: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 1033: packet_start(SSH_CMSG_EOF);
1034: packet_send();
1.11 markus 1035: }
1.72 stevesk 1036: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 1037: /*
1038: * Normal successful read, and no escape character.
1039: * Just append the data to buffer.
1040: */
1.11 markus 1041: buffer_append(&stdin_buffer, buf, len);
1042: } else {
1.13 markus 1043: /*
1044: * Normal, successful read. But we have an escape character
1045: * and have to process the characters one by one.
1046: */
1.52 markus 1047: if (process_escapes(&stdin_buffer, &stdout_buffer,
1048: &stderr_buffer, buf, len) == -1)
1.31 markus 1049: return;
1.11 markus 1050: }
1051: }
1052: }
1053:
1.77 itojun 1054: static void
1.11 markus 1055: client_process_output(fd_set * writeset)
1056: {
1057: int len;
1058: char buf[100];
1.1 deraadt 1059:
1.11 markus 1060: /* Write buffered output to stdout. */
1061: if (FD_ISSET(fileno(stdout), writeset)) {
1062: /* Write as much data as possible. */
1063: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1064: buffer_len(&stdout_buffer));
1.11 markus 1065: if (len <= 0) {
1.64 markus 1066: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1067: len = 0;
1068: else {
1.13 markus 1069: /*
1070: * An error or EOF was encountered. Put an
1071: * error message to stderr buffer.
1072: */
1.11 markus 1073: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
1074: buffer_append(&stderr_buffer, buf, strlen(buf));
1075: quit_pending = 1;
1076: return;
1077: }
1078: }
1079: /* Consume printed data from the buffer. */
1080: buffer_consume(&stdout_buffer, len);
1.57 markus 1081: stdout_bytes += len;
1.11 markus 1082: }
1083: /* Write buffered output to stderr. */
1084: if (FD_ISSET(fileno(stderr), writeset)) {
1085: /* Write as much data as possible. */
1086: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1087: buffer_len(&stderr_buffer));
1.11 markus 1088: if (len <= 0) {
1.64 markus 1089: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1090: len = 0;
1091: else {
1.13 markus 1092: /* EOF or error, but can't even print error message. */
1.11 markus 1093: quit_pending = 1;
1094: return;
1095: }
1096: }
1097: /* Consume printed characters from the buffer. */
1098: buffer_consume(&stderr_buffer, len);
1.57 markus 1099: stderr_bytes += len;
1.11 markus 1100: }
1.1 deraadt 1101: }
1102:
1.13 markus 1103: /*
1.15 markus 1104: * Get packets from the connection input buffer, and process them as long as
1105: * there are packets available.
1106: *
1107: * Any unknown packets received during the actual
1108: * session cause the session to terminate. This is
1109: * intended to make debugging easier since no
1110: * confirmations are sent. Any compatible protocol
1111: * extensions must be negotiated during the
1112: * preparatory phase.
1113: */
1114:
1.77 itojun 1115: static void
1.49 itojun 1116: client_process_buffered_input_packets(void)
1.15 markus 1117: {
1.54 markus 1118: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 1119: }
1120:
1.31 markus 1121: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 1122:
1.77 itojun 1123: static int
1.31 markus 1124: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 1125: {
1.31 markus 1126: /* XXX we assume c->extended is writeable */
1127: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 1128: }
1129:
1.77 itojun 1130: static void
1.60 markus 1131: client_channel_closed(int id, void *arg)
1132: {
1.83 markus 1133: channel_cancel_cleanup(id);
1.60 markus 1134: session_closed = 1;
1.112.2.1 brad 1135: leave_raw_mode();
1.60 markus 1136: }
1137:
1.15 markus 1138: /*
1.13 markus 1139: * Implements the interactive session with the server. This is called after
1140: * the user has been authenticated, and a command has been started on the
1.72 stevesk 1141: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
1142: * used as an escape character for terminating or suspending the session.
1.13 markus 1143: */
1.1 deraadt 1144:
1.20 markus 1145: int
1.30 markus 1146: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 1147: {
1.46 markus 1148: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 1149: double start_time, total_time;
1.112.2.2! brad 1150: int max_fd = 0, max_fd2 = 0, len, rekeying = 0;
! 1151: u_int nalloc = 0;
1.11 markus 1152: char buf[100];
1153:
1154: debug("Entering interactive session.");
1155:
1156: start_time = get_current_time();
1157:
1158: /* Initialize variables. */
1159: escape_pending = 0;
1160: last_was_cr = 1;
1161: exit_status = -1;
1162: stdin_eof = 0;
1163: buffer_high = 64 * 1024;
1164: connection_in = packet_get_connection_in();
1165: connection_out = packet_get_connection_out();
1.46 markus 1166: max_fd = MAX(connection_in, connection_out);
1.112.2.2! brad 1167: if (control_fd != -1)
! 1168: max_fd = MAX(max_fd, control_fd);
1.46 markus 1169:
1170: if (!compat20) {
1.63 markus 1171: /* enable nonblocking unless tty */
1172: if (!isatty(fileno(stdin)))
1173: set_nonblock(fileno(stdin));
1174: if (!isatty(fileno(stdout)))
1175: set_nonblock(fileno(stdout));
1176: if (!isatty(fileno(stderr)))
1177: set_nonblock(fileno(stderr));
1.46 markus 1178: max_fd = MAX(max_fd, fileno(stdin));
1179: max_fd = MAX(max_fd, fileno(stdout));
1180: max_fd = MAX(max_fd, fileno(stderr));
1181: }
1.11 markus 1182: stdin_bytes = 0;
1183: stdout_bytes = 0;
1184: stderr_bytes = 0;
1185: quit_pending = 0;
1186: escape_char = escape_char_arg;
1187:
1188: /* Initialize buffers. */
1189: buffer_init(&stdin_buffer);
1190: buffer_init(&stdout_buffer);
1191: buffer_init(&stderr_buffer);
1192:
1.15 markus 1193: client_init_dispatch();
1194:
1.105 markus 1195: /*
1196: * Set signal handlers, (e.g. to restore non-blocking mode)
1197: * but don't overwrite SIG_IGN, matches behaviour from rsh(1)
1198: */
1199: if (signal(SIGINT, SIG_IGN) != SIG_IGN)
1200: signal(SIGINT, signal_handler);
1201: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
1202: signal(SIGQUIT, signal_handler);
1203: if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
1204: signal(SIGTERM, signal_handler);
1.11 markus 1205: if (have_pty)
1206: signal(SIGWINCH, window_change_handler);
1207:
1208: if (have_pty)
1209: enter_raw_mode();
1210:
1.48 markus 1211: if (compat20) {
1212: session_ident = ssh2_chan_id;
1.72 stevesk 1213: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 1214: channel_register_filter(session_ident,
1215: simple_escape_filter);
1.60 markus 1216: if (session_ident != -1)
1217: channel_register_cleanup(session_ident,
1218: client_channel_closed);
1.48 markus 1219: } else {
1220: /* Check if we should immediately send eof on stdin. */
1.16 markus 1221: client_check_initial_eof_on_stdin();
1.48 markus 1222: }
1.30 markus 1223:
1.11 markus 1224: /* Main loop of the client for the interactive session mode. */
1225: while (!quit_pending) {
1226:
1.13 markus 1227: /* Process buffered packets sent by the server. */
1.11 markus 1228: client_process_buffered_input_packets();
1229:
1.60 markus 1230: if (compat20 && session_closed && !channel_still_open())
1231: break;
1232:
1.56 markus 1233: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 1234:
1.56 markus 1235: if (rekeying) {
1236: debug("rekeying in progress");
1237: } else {
1238: /*
1239: * Make packets of buffered stdin data, and buffer
1240: * them for sending to the server.
1241: */
1242: if (!compat20)
1243: client_make_packets_from_stdin_data();
1.11 markus 1244:
1.56 markus 1245: /*
1246: * Make packets from buffered channel data, and
1247: * enqueue them for sending to the server.
1248: */
1249: if (packet_not_very_much_data_to_write())
1250: channel_output_poll();
1.11 markus 1251:
1.56 markus 1252: /*
1253: * Check if the window size has changed, and buffer a
1254: * message about it to the server if so.
1255: */
1256: client_check_window_change();
1.11 markus 1257:
1.56 markus 1258: if (quit_pending)
1259: break;
1260: }
1.13 markus 1261: /*
1262: * Wait until we have something to do (something becomes
1263: * available on one of the descriptors).
1264: */
1.81 markus 1265: max_fd2 = max_fd;
1.56 markus 1266: client_wait_until_can_do_something(&readset, &writeset,
1.81 markus 1267: &max_fd2, &nalloc, rekeying);
1.11 markus 1268:
1269: if (quit_pending)
1270: break;
1271:
1.56 markus 1272: /* Do channel operations unless rekeying in progress. */
1273: if (!rekeying) {
1274: channel_after_select(readset, writeset);
1.108 markus 1275: if (need_rekeying || packet_need_rekeying()) {
1276: debug("need rekeying");
1.56 markus 1277: xxx_kex->done = 0;
1278: kex_send_kexinit(xxx_kex);
1279: need_rekeying = 0;
1280: }
1281: }
1.11 markus 1282:
1.17 markus 1283: /* Buffer input from the connection. */
1.46 markus 1284: client_process_net_input(readset);
1.17 markus 1285:
1.112.2.2! brad 1286: /* Accept control connections. */
! 1287: client_process_control(readset);
! 1288:
1.17 markus 1289: if (quit_pending)
1290: break;
1.11 markus 1291:
1.17 markus 1292: if (!compat20) {
1293: /* Buffer data from stdin */
1.46 markus 1294: client_process_input(readset);
1.17 markus 1295: /*
1296: * Process output to stdout and stderr. Output to
1297: * the connection is processed elsewhere (above).
1298: */
1.46 markus 1299: client_process_output(writeset);
1.17 markus 1300: }
1.11 markus 1301:
1.13 markus 1302: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 1303: if (FD_ISSET(connection_out, writeset))
1.11 markus 1304: packet_write_poll();
1305: }
1.46 markus 1306: if (readset)
1307: xfree(readset);
1308: if (writeset)
1309: xfree(writeset);
1.11 markus 1310:
1311: /* Terminate the session. */
1312:
1313: /* Stop watching for window change. */
1314: if (have_pty)
1315: signal(SIGWINCH, SIG_DFL);
1316:
1.76 markus 1317: channel_free_all();
1.11 markus 1318:
1.75 markus 1319: if (have_pty)
1320: leave_raw_mode();
1321:
1322: /* restore blocking io */
1323: if (!isatty(fileno(stdin)))
1324: unset_nonblock(fileno(stdin));
1325: if (!isatty(fileno(stdout)))
1326: unset_nonblock(fileno(stdout));
1327: if (!isatty(fileno(stderr)))
1328: unset_nonblock(fileno(stderr));
1329:
1.112.2.1 brad 1330: /*
1331: * If there was no shell or command requested, there will be no remote
1332: * exit status to be returned. In that case, clear error code if the
1333: * connection was deliberately terminated at this end.
1334: */
1335: if (no_shell_flag && received_signal == SIGTERM) {
1336: received_signal = 0;
1337: exit_status = 0;
1.75 markus 1338: }
1339:
1.112.2.1 brad 1340: if (received_signal)
1341: fatal("Killed by signal %d.", (int) received_signal);
1342:
1.13 markus 1343: /*
1344: * In interactive mode (with pseudo tty) display a message indicating
1345: * that the connection has been closed.
1346: */
1.11 markus 1347: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
1348: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
1349: buffer_append(&stderr_buffer, buf, strlen(buf));
1350: }
1.70 markus 1351:
1.11 markus 1352: /* Output any buffered data for stdout. */
1.70 markus 1353: while (buffer_len(&stdout_buffer) > 0) {
1354: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1355: buffer_len(&stdout_buffer));
1.70 markus 1356: if (len <= 0) {
1.11 markus 1357: error("Write failed flushing stdout buffer.");
1.70 markus 1358: break;
1359: }
1.11 markus 1360: buffer_consume(&stdout_buffer, len);
1.57 markus 1361: stdout_bytes += len;
1.11 markus 1362: }
1363:
1364: /* Output any buffered data for stderr. */
1.70 markus 1365: while (buffer_len(&stderr_buffer) > 0) {
1366: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1367: buffer_len(&stderr_buffer));
1.70 markus 1368: if (len <= 0) {
1.11 markus 1369: error("Write failed flushing stderr buffer.");
1.70 markus 1370: break;
1371: }
1.11 markus 1372: buffer_consume(&stderr_buffer, len);
1.57 markus 1373: stderr_bytes += len;
1.11 markus 1374: }
1375:
1376: /* Clear and free any buffers. */
1377: memset(buf, 0, sizeof(buf));
1378: buffer_free(&stdin_buffer);
1379: buffer_free(&stdout_buffer);
1380: buffer_free(&stderr_buffer);
1381:
1382: /* Report bytes transferred, and transfer rates. */
1383: total_time = get_current_time() - start_time;
1384: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
1.90 deraadt 1385: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
1.11 markus 1386: if (total_time > 0)
1387: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
1.90 deraadt 1388: stdin_bytes / total_time, stdout_bytes / total_time,
1389: stderr_bytes / total_time);
1.11 markus 1390:
1391: /* Return the exit status of the program. */
1392: debug("Exit status %d", exit_status);
1393: return exit_status;
1.15 markus 1394: }
1395:
1396: /*********/
1397:
1.77 itojun 1398: static void
1.94 markus 1399: client_input_stdout_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(&stdout_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_stderr_data(int type, u_int32_t seq, void *ctxt)
1.15 markus 1410: {
1.42 markus 1411: u_int data_len;
1.15 markus 1412: char *data = packet_get_string(&data_len);
1.93 markus 1413: packet_check_eom();
1.15 markus 1414: buffer_append(&stderr_buffer, data, data_len);
1415: memset(data, 0, data_len);
1416: xfree(data);
1417: }
1.77 itojun 1418: static void
1.94 markus 1419: client_input_exit_status(int type, u_int32_t seq, void *ctxt)
1.15 markus 1420: {
1421: exit_status = packet_get_int();
1.93 markus 1422: packet_check_eom();
1.15 markus 1423: /* Acknowledge the exit. */
1424: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1425: packet_send();
1426: /*
1427: * Must wait for packet to be sent since we are
1428: * exiting the loop.
1429: */
1430: packet_write_wait();
1431: /* Flag that we want to exit. */
1432: quit_pending = 1;
1433: }
1.112.2.1 brad 1434: static void
1435: client_input_agent_open(int type, u_int32_t seq, void *ctxt)
1436: {
1437: Channel *c = NULL;
1438: int remote_id, sock;
1439:
1440: /* Read the remote channel number from the message. */
1441: remote_id = packet_get_int();
1442: packet_check_eom();
1443:
1444: /*
1445: * Get a connection to the local authentication agent (this may again
1446: * get forwarded).
1447: */
1448: sock = ssh_get_authentication_socket();
1449:
1450: /*
1451: * If we could not connect the agent, send an error message back to
1452: * the server. This should never happen unless the agent dies,
1453: * because authentication forwarding is only enabled if we have an
1454: * agent.
1455: */
1456: if (sock >= 0) {
1457: c = channel_new("", SSH_CHANNEL_OPEN, sock, sock,
1458: -1, 0, 0, 0, "authentication agent connection", 1);
1459: c->remote_id = remote_id;
1460: c->force_drain = 1;
1461: }
1462: if (c == NULL) {
1463: packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE);
1464: packet_put_int(remote_id);
1465: } else {
1466: /* Send a confirmation to the remote host. */
1467: debug("Forwarding authentication connection.");
1468: packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
1469: packet_put_int(remote_id);
1470: packet_put_int(c->self);
1471: }
1472: packet_send();
1473: }
1.15 markus 1474:
1.77 itojun 1475: static Channel *
1.40 markus 1476: client_request_forwarded_tcpip(const char *request_type, int rchan)
1477: {
1.103 deraadt 1478: Channel *c = NULL;
1.40 markus 1479: char *listen_address, *originator_address;
1480: int listen_port, originator_port;
1.67 markus 1481: int sock;
1.40 markus 1482:
1483: /* Get rest of the packet */
1484: listen_address = packet_get_string(NULL);
1485: listen_port = packet_get_int();
1486: originator_address = packet_get_string(NULL);
1487: originator_port = packet_get_int();
1.93 markus 1488: packet_check_eom();
1.40 markus 1489:
1490: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1491: listen_address, listen_port, originator_address, originator_port);
1492:
1.80 stevesk 1493: sock = channel_connect_by_listen_address(listen_port);
1.67 markus 1494: if (sock < 0) {
1495: xfree(originator_address);
1496: xfree(listen_address);
1497: return NULL;
1498: }
1499: c = channel_new("forwarded-tcpip",
1500: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1501: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1502: originator_address, 1);
1.40 markus 1503: xfree(originator_address);
1504: xfree(listen_address);
1505: return c;
1506: }
1507:
1.103 deraadt 1508: static Channel *
1.40 markus 1509: client_request_x11(const char *request_type, int rchan)
1510: {
1511: Channel *c = NULL;
1512: char *originator;
1513: int originator_port;
1.67 markus 1514: int sock;
1.40 markus 1515:
1516: if (!options.forward_x11) {
1517: error("Warning: ssh server tried X11 forwarding.");
1518: error("Warning: this is probably a break in attempt by a malicious server.");
1519: return NULL;
1520: }
1521: originator = packet_get_string(NULL);
1522: if (datafellows & SSH_BUG_X11FWD) {
1523: debug2("buggy server: x11 request w/o originator_port");
1524: originator_port = 0;
1525: } else {
1526: originator_port = packet_get_int();
1527: }
1.93 markus 1528: packet_check_eom();
1.40 markus 1529: /* XXX check permission */
1.47 markus 1530: debug("client_request_x11: request from %s %d", originator,
1531: originator_port);
1.67 markus 1532: xfree(originator);
1.40 markus 1533: sock = x11_connect_display();
1.67 markus 1534: if (sock < 0)
1535: return NULL;
1536: c = channel_new("x11",
1537: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1.110 markus 1538: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
1.82 markus 1539: c->force_drain = 1;
1.40 markus 1540: return c;
1541: }
1542:
1.103 deraadt 1543: static Channel *
1.40 markus 1544: client_request_agent(const char *request_type, int rchan)
1545: {
1546: Channel *c = NULL;
1.67 markus 1547: int sock;
1.40 markus 1548:
1549: if (!options.forward_agent) {
1550: error("Warning: ssh server tried agent forwarding.");
1551: error("Warning: this is probably a break in attempt by a malicious server.");
1552: return NULL;
1553: }
1554: sock = ssh_get_authentication_socket();
1.67 markus 1555: if (sock < 0)
1556: return NULL;
1557: c = channel_new("authentication agent connection",
1558: SSH_CHANNEL_OPEN, sock, sock, -1,
1559: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1.110 markus 1560: "authentication agent connection", 1);
1.82 markus 1561: c->force_drain = 1;
1.40 markus 1562: return c;
1563: }
1564:
1.22 markus 1565: /* XXXX move to generic input handler */
1.77 itojun 1566: static void
1.94 markus 1567: client_input_channel_open(int type, u_int32_t seq, void *ctxt)
1.22 markus 1568: {
1569: Channel *c = NULL;
1570: char *ctype;
1571: int rchan;
1.102 markus 1572: u_int rmaxpack, rwindow, len;
1.22 markus 1573:
1574: ctype = packet_get_string(&len);
1575: rchan = packet_get_int();
1576: rwindow = packet_get_int();
1577: rmaxpack = packet_get_int();
1578:
1.24 markus 1579: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1580: ctype, rchan, rwindow, rmaxpack);
1581:
1.40 markus 1582: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1583: c = client_request_forwarded_tcpip(ctype, rchan);
1584: } else if (strcmp(ctype, "x11") == 0) {
1585: c = client_request_x11(ctype, rchan);
1586: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1587: c = client_request_agent(ctype, rchan);
1.22 markus 1588: }
1589: /* XXX duplicate : */
1590: if (c != NULL) {
1591: debug("confirm %s", ctype);
1592: c->remote_id = rchan;
1593: c->remote_window = rwindow;
1594: c->remote_maxpacket = rmaxpack;
1.69 markus 1595: if (c->type != SSH_CHANNEL_CONNECTING) {
1596: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1597: packet_put_int(c->remote_id);
1598: packet_put_int(c->self);
1599: packet_put_int(c->local_window);
1600: packet_put_int(c->local_maxpacket);
1601: packet_send();
1602: }
1.22 markus 1603: } else {
1604: debug("failure %s", ctype);
1605: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1606: packet_put_int(rchan);
1607: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1608: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1609: packet_put_cstring("open failed");
1.66 markus 1610: packet_put_cstring("");
1611: }
1.22 markus 1612: packet_send();
1613: }
1614: xfree(ctype);
1615: }
1.77 itojun 1616: static void
1.94 markus 1617: client_input_channel_req(int type, u_int32_t seq, void *ctxt)
1.48 markus 1618: {
1619: Channel *c = NULL;
1.112.2.2! brad 1620: int exitval, id, reply, success = 0;
1.48 markus 1621: char *rtype;
1622:
1623: id = packet_get_int();
1624: rtype = packet_get_string(NULL);
1625: reply = packet_get_char();
1626:
1627: debug("client_input_channel_req: channel %d rtype %s reply %d",
1628: id, rtype, reply);
1629:
1.112.2.2! brad 1630: if (id == -1) {
! 1631: error("client_input_channel_req: request for channel -1");
! 1632: } else if ((c = channel_lookup(id)) == NULL) {
1.48 markus 1633: error("client_input_channel_req: channel %d: unknown channel", id);
1634: } else if (strcmp(rtype, "exit-status") == 0) {
1.112.2.2! brad 1635: exitval = packet_get_int();
! 1636: if (id == session_ident) {
! 1637: success = 1;
! 1638: exit_status = exitval;
! 1639: } else if (c->ctl_fd == -1) {
! 1640: error("client_input_channel_req: unexpected channel %d",
! 1641: session_ident);
! 1642: } else {
! 1643: atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
! 1644: success = 1;
! 1645: }
1.93 markus 1646: packet_check_eom();
1.48 markus 1647: }
1648: if (reply) {
1649: packet_start(success ?
1650: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1.112.2.2! brad 1651: packet_put_int(id);
1.48 markus 1652: packet_send();
1653: }
1654: xfree(rtype);
1655: }
1.95 markus 1656: static void
1657: client_input_global_request(int type, u_int32_t seq, void *ctxt)
1658: {
1659: char *rtype;
1660: int want_reply;
1661: int success = 0;
1662:
1663: rtype = packet_get_string(NULL);
1664: want_reply = packet_get_char();
1.112.2.1 brad 1665: debug("client_input_global_request: rtype %s want_reply %d",
1666: rtype, want_reply);
1.95 markus 1667: if (want_reply) {
1668: packet_start(success ?
1669: SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1670: packet_send();
1671: packet_write_wait();
1672: }
1673: xfree(rtype);
1674: }
1.22 markus 1675:
1.112.2.2! brad 1676: void
! 1677: client_session2_setup(int id, int want_tty, int want_subsystem,
! 1678: const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env,
! 1679: dispatch_fn *subsys_repl)
! 1680: {
! 1681: int len;
! 1682:
! 1683: debug2("%s: id %d", __func__, id);
! 1684:
! 1685: if (want_tty) {
! 1686: struct winsize ws;
! 1687: struct termios tio;
! 1688:
! 1689: /* Store window size in the packet. */
! 1690: if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
! 1691: memset(&ws, 0, sizeof(ws));
! 1692:
! 1693: channel_request_start(id, "pty-req", 0);
! 1694: packet_put_cstring(term != NULL ? term : "");
! 1695: packet_put_int(ws.ws_col);
! 1696: packet_put_int(ws.ws_row);
! 1697: packet_put_int(ws.ws_xpixel);
! 1698: packet_put_int(ws.ws_ypixel);
! 1699: tio = get_saved_tio();
! 1700: tty_make_modes(-1, tiop != NULL ? tiop : &tio);
! 1701: packet_send();
! 1702: /* XXX wait for reply */
! 1703: }
! 1704:
! 1705: /* Transfer any environment variables from client to server */
! 1706: if (options.num_send_env != 0 && env != NULL) {
! 1707: int i, j, matched;
! 1708: char *name, *val;
! 1709:
! 1710: debug("Sending environment.");
! 1711: for (i = 0; env[i] != NULL; i++) {
! 1712: /* Split */
! 1713: name = xstrdup(env[i]);
! 1714: if ((val = strchr(name, '=')) == NULL) {
! 1715: free(name);
! 1716: continue;
! 1717: }
! 1718: *val++ = '\0';
! 1719:
! 1720: matched = 0;
! 1721: for (j = 0; j < options.num_send_env; j++) {
! 1722: if (match_pattern(name, options.send_env[j])) {
! 1723: matched = 1;
! 1724: break;
! 1725: }
! 1726: }
! 1727: if (!matched) {
! 1728: debug3("Ignored env %s", name);
! 1729: free(name);
! 1730: continue;
! 1731: }
! 1732:
! 1733: debug("Sending env %s = %s", name, val);
! 1734: channel_request_start(id, "env", 0);
! 1735: packet_put_cstring(name);
! 1736: packet_put_cstring(val);
! 1737: packet_send();
! 1738: free(name);
! 1739: }
! 1740: }
! 1741:
! 1742: len = buffer_len(cmd);
! 1743: if (len > 0) {
! 1744: if (len > 900)
! 1745: len = 900;
! 1746: if (want_subsystem) {
! 1747: debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd));
! 1748: channel_request_start(id, "subsystem", subsys_repl != NULL);
! 1749: if (subsys_repl != NULL) {
! 1750: /* register callback for reply */
! 1751: /* XXX we assume that client_loop has already been called */
! 1752: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl);
! 1753: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl);
! 1754: }
! 1755: } else {
! 1756: debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd));
! 1757: channel_request_start(id, "exec", 0);
! 1758: }
! 1759: packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
! 1760: packet_send();
! 1761: } else {
! 1762: channel_request_start(id, "shell", 0);
! 1763: packet_send();
! 1764: }
! 1765: }
! 1766:
1.77 itojun 1767: static void
1.49 itojun 1768: client_init_dispatch_20(void)
1.16 markus 1769: {
1.55 markus 1770: dispatch_init(&dispatch_protocol_error);
1.100 markus 1771:
1.16 markus 1772: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1773: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1774: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1775: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1776: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1777: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1778: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1779: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1780: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.95 markus 1781: dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
1.55 markus 1782:
1783: /* rekeying */
1784: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.100 markus 1785:
1786: /* global request reply messages */
1787: dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
1788: dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
1.16 markus 1789: }
1.77 itojun 1790: static void
1.49 itojun 1791: client_init_dispatch_13(void)
1.15 markus 1792: {
1793: dispatch_init(NULL);
1794: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1795: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1796: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1797: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1798: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1799: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1800: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1801: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1802: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1803:
1804: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1.112.2.1 brad 1805: &client_input_agent_open : &deny_input_open);
1.39 markus 1806: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1807: &x11_input_open : &deny_input_open);
1.15 markus 1808: }
1.77 itojun 1809: static void
1.49 itojun 1810: client_init_dispatch_15(void)
1.15 markus 1811: {
1812: client_init_dispatch_13();
1813: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1814: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1815: }
1.79 stevesk 1816: static void
1.49 itojun 1817: client_init_dispatch(void)
1.15 markus 1818: {
1.16 markus 1819: if (compat20)
1820: client_init_dispatch_20();
1821: else if (compat13)
1.15 markus 1822: client_init_dispatch_13();
1823: else
1824: client_init_dispatch_15();
1.112.2.1 brad 1825: }
1826:
1827: /* client specific fatal cleanup */
1828: void
1829: cleanup_exit(int i)
1830: {
1831: leave_raw_mode();
1832: leave_non_blocking();
1.112.2.2! brad 1833: if (options.control_path != NULL && control_fd != -1)
! 1834: unlink(options.control_path);
1.112.2.1 brad 1835: _exit(i);
1.1 deraadt 1836: }
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