Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.193
1.193 ! markus 1: /* $OpenBSD: clientloop.c,v 1.192 2008/05/09 14:18:44 djm Exp $ */
1.1 deraadt 2: /*
1.12 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.33 deraadt 6: * The main loop for the interactive session (client side).
1.20 markus 7: *
1.33 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
13: *
14: *
15: * Copyright (c) 1999 Theo de Raadt. All rights reserved.
16: *
17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.20 markus 36: *
37: *
1.33 deraadt 38: * SSH2 support added by Markus Friedl.
1.78 markus 39: * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved.
1.20 markus 40: *
1.33 deraadt 41: * Redistribution and use in source and binary forms, with or without
42: * modification, are permitted provided that the following conditions
43: * are met:
44: * 1. Redistributions of source code must retain the above copyright
45: * notice, this list of conditions and the following disclaimer.
46: * 2. Redistributions in binary form must reproduce the above copyright
47: * notice, this list of conditions and the following disclaimer in the
48: * documentation and/or other materials provided with the distribution.
49: *
50: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
51: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
52: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
53: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
54: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
55: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
56: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
57: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
58: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
59: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.12 deraadt 60: */
1.1 deraadt 61:
1.152 stevesk 62:
1.175 deraadt 63: #include <sys/types.h>
1.152 stevesk 64: #include <sys/ioctl.h>
1.154 stevesk 65: #include <sys/stat.h>
1.166 stevesk 66: #include <sys/socket.h>
1.171 stevesk 67: #include <sys/time.h>
1.172 stevesk 68: #include <sys/param.h>
1.189 djm 69: #include <sys/queue.h>
1.150 stevesk 70:
1.155 stevesk 71: #include <ctype.h>
1.168 stevesk 72: #include <errno.h>
1.151 stevesk 73: #include <paths.h>
1.153 stevesk 74: #include <signal.h>
1.174 stevesk 75: #include <stdio.h>
1.173 stevesk 76: #include <stdlib.h>
1.170 stevesk 77: #include <string.h>
1.150 stevesk 78: #include <termios.h>
1.175 deraadt 79: #include <pwd.h>
1.169 stevesk 80: #include <unistd.h>
1.1 deraadt 81:
1.175 deraadt 82: #include "xmalloc.h"
1.45 markus 83: #include "ssh.h"
84: #include "ssh1.h"
85: #include "ssh2.h"
1.1 deraadt 86: #include "packet.h"
87: #include "buffer.h"
1.15 markus 88: #include "compat.h"
1.74 markus 89: #include "channels.h"
1.15 markus 90: #include "dispatch.h"
1.40 markus 91: #include "key.h"
1.175 deraadt 92: #include "cipher.h"
1.54 markus 93: #include "kex.h"
1.45 markus 94: #include "log.h"
95: #include "readconf.h"
96: #include "clientloop.h"
1.147 djm 97: #include "sshconnect.h"
1.40 markus 98: #include "authfd.h"
1.45 markus 99: #include "atomicio.h"
1.118 deraadt 100: #include "sshpty.h"
1.63 markus 101: #include "misc.h"
1.123 djm 102: #include "monitor_fdpass.h"
103: #include "match.h"
104: #include "msg.h"
1.39 markus 105:
106: /* import options */
107: extern Options options;
108:
1.1 deraadt 109: /* Flag indicating that stdin should be redirected from /dev/null. */
110: extern int stdin_null_flag;
111:
1.116 dtucker 112: /* Flag indicating that no shell has been requested */
113: extern int no_shell_flag;
114:
1.123 djm 115: /* Control socket */
1.192 djm 116: extern int muxserver_sock;
1.123 djm 117:
1.13 markus 118: /*
119: * Name of the host we are connecting to. This is the name given on the
120: * command line, or the HostName specified for the user-supplied name in a
121: * configuration file.
122: */
1.1 deraadt 123: extern char *host;
124:
1.13 markus 125: /*
126: * Flag to indicate that we have received a window change signal which has
127: * not yet been processed. This will cause a message indicating the new
128: * window size to be sent to the server a little later. This is volatile
129: * because this is updated in a signal handler.
130: */
1.88 markus 131: static volatile sig_atomic_t received_window_change_signal = 0;
132: static volatile sig_atomic_t received_signal = 0;
1.1 deraadt 133:
1.145 djm 134: /* Flag indicating whether the user's terminal is in non-blocking mode. */
1.1 deraadt 135: static int in_non_blocking_mode = 0;
136:
137: /* Common data for the client loop code. */
1.162 djm 138: static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */
1.31 markus 139: static int escape_char; /* Escape character. */
1.11 markus 140: static int escape_pending; /* Last character was the escape character */
141: static int last_was_cr; /* Last character was a newline. */
142: static int exit_status; /* Used to store the exit status of the command. */
143: static int stdin_eof; /* EOF has been encountered on standard error. */
144: static Buffer stdin_buffer; /* Buffer for stdin data. */
145: static Buffer stdout_buffer; /* Buffer for stdout data. */
146: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 147: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
148: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 149: static int connection_in; /* Connection to server (input). */
150: static int connection_out; /* Connection to server (output). */
1.56 markus 151: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 152: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 153:
1.77 itojun 154: static void client_init_dispatch(void);
1.16 markus 155: int session_ident = -1;
156:
1.190 djm 157: struct channel_reply_ctx {
158: const char *request_type;
159: int id, do_close;
160: };
161:
1.54 markus 162: /*XXX*/
163: extern Kex *xxx_kex;
164:
1.123 djm 165: void ssh_process_session2_setup(int, int, int, Buffer *);
166:
1.1 deraadt 167: /* Restores stdin to blocking mode. */
168:
1.77 itojun 169: static void
1.49 itojun 170: leave_non_blocking(void)
1.1 deraadt 171: {
1.11 markus 172: if (in_non_blocking_mode) {
1.125 djm 173: unset_nonblock(fileno(stdin));
1.11 markus 174: in_non_blocking_mode = 0;
175: }
1.1 deraadt 176: }
177:
1.11 markus 178: /* Puts stdin terminal in non-blocking mode. */
179:
1.77 itojun 180: static void
1.49 itojun 181: enter_non_blocking(void)
1.1 deraadt 182: {
1.11 markus 183: in_non_blocking_mode = 1;
1.124 djm 184: set_nonblock(fileno(stdin));
1.1 deraadt 185: }
186:
1.13 markus 187: /*
188: * Signal handler for the window change signal (SIGWINCH). This just sets a
189: * flag indicating that the window has changed.
190: */
1.157 deraadt 191: /*ARGSUSED */
1.77 itojun 192: static void
1.11 markus 193: window_change_handler(int sig)
1.1 deraadt 194: {
1.11 markus 195: received_window_change_signal = 1;
196: signal(SIGWINCH, window_change_handler);
1.1 deraadt 197: }
198:
1.13 markus 199: /*
200: * Signal handler for signals that cause the program to terminate. These
201: * signals must be trapped to restore terminal modes.
202: */
1.157 deraadt 203: /*ARGSUSED */
1.77 itojun 204: static void
1.11 markus 205: signal_handler(int sig)
1.1 deraadt 206: {
1.75 markus 207: received_signal = sig;
208: quit_pending = 1;
1.1 deraadt 209: }
210:
1.13 markus 211: /*
212: * Returns current time in seconds from Jan 1, 1970 with the maximum
213: * available resolution.
214: */
1.1 deraadt 215:
1.77 itojun 216: static double
1.49 itojun 217: get_current_time(void)
1.1 deraadt 218: {
1.11 markus 219: struct timeval tv;
220: gettimeofday(&tv, NULL);
221: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.138 djm 222: }
223:
224: #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
225: void
226: client_x11_get_proto(const char *display, const char *xauth_path,
227: u_int trusted, char **_proto, char **_data)
228: {
229: char cmd[1024];
230: char line[512];
231: char xdisplay[512];
232: static char proto[512], data[512];
233: FILE *f;
234: int got_data = 0, generated = 0, do_unlink = 0, i;
235: char *xauthdir, *xauthfile;
236: struct stat st;
237:
238: xauthdir = xauthfile = NULL;
239: *_proto = proto;
240: *_data = data;
241: proto[0] = data[0] = '\0';
242:
243: if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) {
244: debug("No xauth program.");
245: } else {
246: if (display == NULL) {
247: debug("x11_get_proto: DISPLAY not set");
248: return;
249: }
250: /*
251: * Handle FamilyLocal case where $DISPLAY does
252: * not match an authorization entry. For this we
253: * just try "xauth list unix:displaynum.screennum".
254: * XXX: "localhost" match to determine FamilyLocal
255: * is not perfect.
256: */
257: if (strncmp(display, "localhost:", 10) == 0) {
258: snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
259: display + 10);
260: display = xdisplay;
261: }
262: if (trusted == 0) {
263: xauthdir = xmalloc(MAXPATHLEN);
264: xauthfile = xmalloc(MAXPATHLEN);
265: strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
266: if (mkdtemp(xauthdir) != NULL) {
267: do_unlink = 1;
268: snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
269: xauthdir);
270: snprintf(cmd, sizeof(cmd),
271: "%s -f %s generate %s " SSH_X11_PROTO
272: " untrusted timeout 1200 2>" _PATH_DEVNULL,
273: xauth_path, xauthfile, display);
274: debug2("x11_get_proto: %s", cmd);
275: if (system(cmd) == 0)
276: generated = 1;
277: }
278: }
1.181 markus 279:
280: /*
281: * When in untrusted mode, we read the cookie only if it was
282: * successfully generated as an untrusted one in the step
283: * above.
284: */
285: if (trusted || generated) {
286: snprintf(cmd, sizeof(cmd),
287: "%s %s%s list %s 2>" _PATH_DEVNULL,
288: xauth_path,
289: generated ? "-f " : "" ,
290: generated ? xauthfile : "",
291: display);
292: debug2("x11_get_proto: %s", cmd);
293: f = popen(cmd, "r");
294: if (f && fgets(line, sizeof(line), f) &&
295: sscanf(line, "%*s %511s %511s", proto, data) == 2)
296: got_data = 1;
297: if (f)
298: pclose(f);
299: } else
300: error("Warning: untrusted X11 forwarding setup failed: "
301: "xauth key data not generated");
1.138 djm 302: }
303:
304: if (do_unlink) {
305: unlink(xauthfile);
306: rmdir(xauthdir);
307: }
308: if (xauthdir)
309: xfree(xauthdir);
310: if (xauthfile)
311: xfree(xauthfile);
312:
313: /*
314: * If we didn't get authentication data, just make up some
315: * data. The forwarding code will check the validity of the
316: * response anyway, and substitute this data. The X11
317: * server, however, will ignore this fake data and use
318: * whatever authentication mechanisms it was using otherwise
319: * for the local connection.
320: */
321: if (!got_data) {
322: u_int32_t rnd = 0;
323:
324: logit("Warning: No xauth data; "
325: "using fake authentication data for X11 forwarding.");
326: strlcpy(proto, SSH_X11_PROTO, sizeof proto);
327: for (i = 0; i < 16; i++) {
328: if (i % 4 == 0)
329: rnd = arc4random();
330: snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
331: rnd & 0xff);
332: rnd >>= 8;
333: }
334: }
1.1 deraadt 335: }
336:
1.13 markus 337: /*
338: * This is called when the interactive is entered. This checks if there is
339: * an EOF coming on stdin. We must check this explicitly, as select() does
340: * not appear to wake up when redirecting from /dev/null.
341: */
1.1 deraadt 342:
1.77 itojun 343: static void
1.49 itojun 344: client_check_initial_eof_on_stdin(void)
1.1 deraadt 345: {
1.11 markus 346: int len;
347: char buf[1];
1.1 deraadt 348:
1.13 markus 349: /*
350: * If standard input is to be "redirected from /dev/null", we simply
351: * mark that we have seen an EOF and send an EOF message to the
352: * server. Otherwise, we try to read a single character; it appears
353: * that for some files, such /dev/null, select() never wakes up for
354: * read for this descriptor, which means that we never get EOF. This
355: * way we will get the EOF if stdin comes from /dev/null or similar.
356: */
1.11 markus 357: if (stdin_null_flag) {
358: /* Fake EOF on stdin. */
359: debug("Sending eof.");
360: stdin_eof = 1;
361: packet_start(SSH_CMSG_EOF);
362: packet_send();
363: } else {
364: enter_non_blocking();
365:
366: /* Check for immediate EOF on stdin. */
367: len = read(fileno(stdin), buf, 1);
368: if (len == 0) {
1.13 markus 369: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 370: debug("Sending eof.");
371: stdin_eof = 1;
372: packet_start(SSH_CMSG_EOF);
373: packet_send();
374: } else if (len > 0) {
1.13 markus 375: /*
376: * Got data. We must store the data in the buffer,
377: * and also process it as an escape character if
378: * appropriate.
379: */
1.42 markus 380: if ((u_char) buf[0] == escape_char)
1.11 markus 381: escape_pending = 1;
1.52 markus 382: else
1.11 markus 383: buffer_append(&stdin_buffer, buf, 1);
384: }
385: leave_non_blocking();
386: }
1.1 deraadt 387: }
388:
389:
1.13 markus 390: /*
391: * Make packets from buffered stdin data, and buffer them for sending to the
392: * connection.
393: */
1.1 deraadt 394:
1.77 itojun 395: static void
1.49 itojun 396: client_make_packets_from_stdin_data(void)
1.1 deraadt 397: {
1.42 markus 398: u_int len;
1.1 deraadt 399:
1.11 markus 400: /* Send buffered stdin data to the server. */
401: while (buffer_len(&stdin_buffer) > 0 &&
1.90 deraadt 402: packet_not_very_much_data_to_write()) {
1.11 markus 403: len = buffer_len(&stdin_buffer);
404: /* Keep the packets at reasonable size. */
405: if (len > packet_get_maxsize())
406: len = packet_get_maxsize();
407: packet_start(SSH_CMSG_STDIN_DATA);
408: packet_put_string(buffer_ptr(&stdin_buffer), len);
409: packet_send();
410: buffer_consume(&stdin_buffer, len);
1.52 markus 411: stdin_bytes += len;
1.11 markus 412: /* If we have a pending EOF, send it now. */
413: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
414: packet_start(SSH_CMSG_EOF);
415: packet_send();
416: }
1.1 deraadt 417: }
418: }
419:
1.13 markus 420: /*
421: * Checks if the client window has changed, and sends a packet about it to
422: * the server if so. The actual change is detected elsewhere (by a software
423: * interrupt on Unix); this just checks the flag and sends a message if
424: * appropriate.
425: */
1.1 deraadt 426:
1.77 itojun 427: static void
1.49 itojun 428: client_check_window_change(void)
1.1 deraadt 429: {
1.16 markus 430: struct winsize ws;
431:
432: if (! received_window_change_signal)
433: return;
434: /** XXX race */
435: received_window_change_signal = 0;
436:
1.37 markus 437: debug2("client_check_window_change: changed");
1.16 markus 438:
439: if (compat20) {
1.123 djm 440: channel_send_window_changes();
1.16 markus 441: } else {
1.123 djm 442: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
443: return;
1.16 markus 444: packet_start(SSH_CMSG_WINDOW_SIZE);
1.158 deraadt 445: packet_put_int((u_int)ws.ws_row);
446: packet_put_int((u_int)ws.ws_col);
447: packet_put_int((u_int)ws.ws_xpixel);
448: packet_put_int((u_int)ws.ws_ypixel);
1.16 markus 449: packet_send();
1.1 deraadt 450: }
451: }
452:
1.117 markus 453: static void
454: client_global_request_reply(int type, u_int32_t seq, void *ctxt)
455: {
1.188 dtucker 456: keep_alive_timeouts = 0;
1.117 markus 457: client_global_request_reply_fwd(type, seq, ctxt);
458: }
459:
460: static void
461: server_alive_check(void)
462: {
1.188 dtucker 463: if (++keep_alive_timeouts > options.server_alive_count_max) {
1.176 markus 464: logit("Timeout, server not responding.");
465: cleanup_exit(255);
466: }
1.117 markus 467: packet_start(SSH2_MSG_GLOBAL_REQUEST);
468: packet_put_cstring("keepalive@openssh.com");
469: packet_put_char(1); /* boolean: want reply */
470: packet_send();
471: }
472:
1.13 markus 473: /*
474: * Waits until the client can do something (some data becomes available on
475: * one of the file descriptors).
476: */
1.77 itojun 477: static void
1.46 markus 478: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.130 avsm 479: int *maxfdp, u_int *nallocp, int rekeying)
1.11 markus 480: {
1.117 markus 481: struct timeval tv, *tvp;
482: int ret;
483:
1.46 markus 484: /* Add any selections by the channel mechanism. */
1.81 markus 485: channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying);
1.11 markus 486:
1.16 markus 487: if (!compat20) {
1.17 markus 488: /* Read from the connection, unless our buffers are full. */
1.16 markus 489: if (buffer_len(&stdout_buffer) < buffer_high &&
490: buffer_len(&stderr_buffer) < buffer_high &&
491: channel_not_very_much_buffered_data())
1.46 markus 492: FD_SET(connection_in, *readsetp);
1.17 markus 493: /*
494: * Read from stdin, unless we have seen EOF or have very much
495: * buffered data to send to the server.
496: */
497: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 498: FD_SET(fileno(stdin), *readsetp);
1.17 markus 499:
500: /* Select stdout/stderr if have data in buffer. */
501: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 502: FD_SET(fileno(stdout), *writesetp);
1.17 markus 503: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 504: FD_SET(fileno(stderr), *writesetp);
1.16 markus 505: } else {
1.71 markus 506: /* channel_prepare_select could have closed the last channel */
1.84 markus 507: if (session_closed && !channel_still_open() &&
508: !packet_have_data_to_write()) {
509: /* clear mask since we did not call select() */
1.87 markus 510: memset(*readsetp, 0, *nallocp);
511: memset(*writesetp, 0, *nallocp);
1.84 markus 512: return;
1.71 markus 513: } else {
514: FD_SET(connection_in, *readsetp);
515: }
1.16 markus 516: }
1.11 markus 517:
518: /* Select server connection if have data to write to the server. */
519: if (packet_have_data_to_write())
1.46 markus 520: FD_SET(connection_out, *writesetp);
1.11 markus 521:
1.192 djm 522: if (muxserver_sock != -1)
523: FD_SET(muxserver_sock, *readsetp);
1.123 djm 524:
1.13 markus 525: /*
526: * Wait for something to happen. This will suspend the process until
527: * some selected descriptor can be read, written, or has some other
1.117 markus 528: * event pending.
1.13 markus 529: */
1.11 markus 530:
1.117 markus 531: if (options.server_alive_interval == 0 || !compat20)
532: tvp = NULL;
1.129 deraadt 533: else {
1.117 markus 534: tv.tv_sec = options.server_alive_interval;
535: tv.tv_usec = 0;
536: tvp = &tv;
537: }
538: ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp);
539: if (ret < 0) {
1.11 markus 540: char buf[100];
1.51 markus 541:
542: /*
543: * We have to clear the select masks, because we return.
544: * We have to return, because the mainloop checks for the flags
545: * set by the signal handlers.
546: */
1.87 markus 547: memset(*readsetp, 0, *nallocp);
548: memset(*writesetp, 0, *nallocp);
1.50 deraadt 549:
1.11 markus 550: if (errno == EINTR)
551: return;
552: /* Note: we might still have data in the buffers. */
553: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
554: buffer_append(&stderr_buffer, buf, strlen(buf));
555: quit_pending = 1;
1.117 markus 556: } else if (ret == 0)
557: server_alive_check();
1.11 markus 558: }
559:
1.77 itojun 560: static void
1.31 markus 561: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 562: {
1.11 markus 563: /* Flush stdout and stderr buffers. */
1.31 markus 564: if (buffer_len(bout) > 0)
1.112 deraadt 565: atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
1.31 markus 566: if (buffer_len(berr) > 0)
1.112 deraadt 567: atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 568:
569: leave_raw_mode();
570:
1.13 markus 571: /*
572: * Free (and clear) the buffer to reduce the amount of data that gets
573: * written to swap.
574: */
1.31 markus 575: buffer_free(bin);
576: buffer_free(bout);
577: buffer_free(berr);
1.11 markus 578:
579: /* Send the suspend signal to the program itself. */
580: kill(getpid(), SIGTSTP);
581:
1.132 djm 582: /* Reset window sizes in case they have changed */
583: received_window_change_signal = 1;
1.11 markus 584:
585: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 586: buffer_init(bin);
587: buffer_init(bout);
588: buffer_init(berr);
1.11 markus 589:
590: enter_raw_mode();
591: }
592:
1.77 itojun 593: static void
1.161 deraadt 594: client_process_net_input(fd_set *readset)
1.11 markus 595: {
1.17 markus 596: int len;
597: char buf[8192];
1.11 markus 598:
1.13 markus 599: /*
600: * Read input from the server, and add any such data to the buffer of
601: * the packet subsystem.
602: */
1.11 markus 603: if (FD_ISSET(connection_in, readset)) {
604: /* Read as much as possible. */
605: len = read(connection_in, buf, sizeof(buf));
606: if (len == 0) {
607: /* Received EOF. The remote host has closed the connection. */
608: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
609: host);
1.1 deraadt 610: buffer_append(&stderr_buffer, buf, strlen(buf));
611: quit_pending = 1;
612: return;
1.11 markus 613: }
1.13 markus 614: /*
615: * There is a kernel bug on Solaris that causes select to
616: * sometimes wake up even though there is no data available.
617: */
1.53 millert 618: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 619: len = 0;
620:
621: if (len < 0) {
622: /* An error has encountered. Perhaps there is a network problem. */
623: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
624: host, strerror(errno));
625: buffer_append(&stderr_buffer, buf, strlen(buf));
626: quit_pending = 1;
627: return;
628: }
629: packet_process_incoming(buf, len);
630: }
1.17 markus 631: }
1.16 markus 632:
1.97 jakob 633: static void
1.190 djm 634: client_status_confirm(int type, Channel *c, void *ctx)
1.123 djm 635: {
1.190 djm 636: struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx;
637: char errmsg[256];
638: int tochan;
639:
640: /* XXX supress on mux _client_ quietmode */
641: tochan = options.log_level >= SYSLOG_LEVEL_ERROR &&
642: c->ctl_fd != -1 && c->extended_usage == CHAN_EXTENDED_WRITE;
643:
644: if (type == SSH2_MSG_CHANNEL_SUCCESS) {
645: debug2("%s request accepted on channel %d",
646: cr->request_type, c->self);
647: } else if (type == SSH2_MSG_CHANNEL_FAILURE) {
648: if (tochan) {
649: snprintf(errmsg, sizeof(errmsg),
650: "%s request failed\r\n", cr->request_type);
651: } else {
652: snprintf(errmsg, sizeof(errmsg),
653: "%s request failed on channel %d",
654: cr->request_type, c->self);
655: }
656: /* If error occurred on primary session channel, then exit */
657: if (cr->do_close && c->self == session_ident)
658: fatal("%s", errmsg);
659: /* If error occurred on mux client, append to their stderr */
660: if (tochan)
661: buffer_append(&c->extended, errmsg, strlen(errmsg));
662: else
663: error("%s", errmsg);
664: if (cr->do_close) {
665: chan_read_failed(c);
666: chan_write_failed(c);
667: }
668: }
669: xfree(cr);
670: }
671:
672: static void
673: client_abandon_status_confirm(Channel *c, void *ctx)
674: {
675: xfree(ctx);
676: }
1.129 deraadt 677:
1.190 djm 678: static void
679: client_expect_confirm(int id, const char *request, int do_close)
680: {
681: struct channel_reply_ctx *cr = xmalloc(sizeof(*cr));
1.123 djm 682:
1.190 djm 683: cr->request_type = request;
684: cr->do_close = do_close;
1.123 djm 685:
1.190 djm 686: channel_register_status_confirm(id, client_status_confirm,
687: client_abandon_status_confirm, cr);
1.123 djm 688: }
689:
690: static void
1.99 markus 691: process_cmdline(void)
1.97 jakob 692: {
693: void (*handler)(int);
1.135 djm 694: char *s, *cmd, *cancel_host;
1.121 djm 695: int delete = 0;
1.97 jakob 696: int local = 0;
1.135 djm 697: u_short cancel_port;
698: Forward fwd;
1.97 jakob 699:
1.183 djm 700: bzero(&fwd, sizeof(fwd));
701: fwd.listen_host = fwd.connect_host = NULL;
702:
1.97 jakob 703: leave_raw_mode();
1.101 markus 704: handler = signal(SIGINT, SIG_IGN);
1.99 markus 705: cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
1.97 jakob 706: if (s == NULL)
707: goto out;
1.179 tedu 708: while (isspace(*s))
1.97 jakob 709: s++;
1.121 djm 710: if (*s == '-')
711: s++; /* Skip cmdline '-', if any */
1.120 dtucker 712: if (*s == '\0')
1.97 jakob 713: goto out;
1.121 djm 714:
1.122 djm 715: if (*s == 'h' || *s == 'H' || *s == '?') {
1.121 djm 716: logit("Commands:");
1.164 djm 717: logit(" -L[bind_address:]port:host:hostport "
718: "Request local forward");
719: logit(" -R[bind_address:]port:host:hostport "
720: "Request remote forward");
1.165 stevesk 721: logit(" -KR[bind_address:]port "
1.164 djm 722: "Cancel remote forward");
1.146 reyk 723: if (!options.permit_local_command)
724: goto out;
1.164 djm 725: logit(" !args "
726: "Execute local command");
1.146 reyk 727: goto out;
728: }
729:
730: if (*s == '!' && options.permit_local_command) {
731: s++;
732: ssh_local_cmd(s);
1.121 djm 733: goto out;
734: }
735:
736: if (*s == 'K') {
737: delete = 1;
738: s++;
739: }
740: if (*s != 'L' && *s != 'R') {
1.109 itojun 741: logit("Invalid command.");
1.97 jakob 742: goto out;
743: }
1.121 djm 744: if (*s == 'L')
1.97 jakob 745: local = 1;
1.121 djm 746: if (local && delete) {
747: logit("Not supported.");
748: goto out;
749: }
750: if ((!local || delete) && !compat20) {
1.109 itojun 751: logit("Not supported for SSH protocol version 1.");
1.97 jakob 752: goto out;
753: }
1.121 djm 754:
1.179 tedu 755: while (isspace(*++s))
756: ;
1.97 jakob 757:
1.121 djm 758: if (delete) {
1.135 djm 759: cancel_port = 0;
760: cancel_host = hpdelim(&s); /* may be NULL */
761: if (s != NULL) {
762: cancel_port = a2port(s);
763: cancel_host = cleanhostname(cancel_host);
764: } else {
765: cancel_port = a2port(cancel_host);
766: cancel_host = NULL;
1.121 djm 767: }
1.135 djm 768: if (cancel_port == 0) {
769: logit("Bad forwarding close port");
1.121 djm 770: goto out;
771: }
1.135 djm 772: channel_request_rforward_cancel(cancel_host, cancel_port);
1.121 djm 773: } else {
1.135 djm 774: if (!parse_forward(&fwd, s)) {
1.121 djm 775: logit("Bad forwarding specification.");
776: goto out;
777: }
778: if (local) {
1.135 djm 779: if (channel_setup_local_fwd_listener(fwd.listen_host,
780: fwd.listen_port, fwd.connect_host,
781: fwd.connect_port, options.gateway_ports) < 0) {
1.121 djm 782: logit("Port forwarding failed.");
783: goto out;
784: }
1.135 djm 785: } else {
1.167 markus 786: if (channel_request_remote_forwarding(fwd.listen_host,
1.135 djm 787: fwd.listen_port, fwd.connect_host,
1.167 markus 788: fwd.connect_port) < 0) {
789: logit("Port forwarding failed.");
790: goto out;
791: }
1.135 djm 792: }
793:
1.121 djm 794: logit("Forwarding port.");
795: }
796:
1.97 jakob 797: out:
798: signal(SIGINT, handler);
799: enter_raw_mode();
800: if (cmd)
801: xfree(cmd);
1.183 djm 802: if (fwd.listen_host != NULL)
803: xfree(fwd.listen_host);
804: if (fwd.connect_host != NULL)
805: xfree(fwd.connect_host);
1.97 jakob 806: }
807:
1.31 markus 808: /* process the characters one by one */
1.77 itojun 809: static int
1.31 markus 810: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
811: {
1.32 markus 812: char string[1024];
1.31 markus 813: pid_t pid;
814: int bytes = 0;
1.42 markus 815: u_int i;
816: u_char ch;
1.31 markus 817: char *s;
818:
1.139 djm 819: if (len <= 0)
820: return (0);
821:
822: for (i = 0; i < (u_int)len; i++) {
1.31 markus 823: /* Get one character at a time. */
824: ch = buf[i];
825:
826: if (escape_pending) {
827: /* We have previously seen an escape character. */
828: /* Clear the flag now. */
829: escape_pending = 0;
830:
831: /* Process the escaped character. */
832: switch (ch) {
833: case '.':
834: /* Terminate the connection. */
1.32 markus 835: snprintf(string, sizeof string, "%c.\r\n", escape_char);
836: buffer_append(berr, string, strlen(string));
1.31 markus 837:
838: quit_pending = 1;
839: return -1;
840:
841: case 'Z' - 64:
842: /* Suspend the program. */
843: /* Print a message to that effect to the user. */
1.32 markus 844: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
845: buffer_append(berr, string, strlen(string));
1.31 markus 846:
847: /* Restore terminal modes and suspend. */
848: client_suspend_self(bin, bout, berr);
849:
850: /* We have been continued. */
851: continue;
852:
1.111 markus 853: case 'B':
854: if (compat20) {
855: snprintf(string, sizeof string,
856: "%cB\r\n", escape_char);
857: buffer_append(berr, string,
858: strlen(string));
859: channel_request_start(session_ident,
860: "break", 0);
861: packet_put_int(1000);
862: packet_send();
863: }
864: continue;
865:
1.54 markus 866: case 'R':
1.59 markus 867: if (compat20) {
868: if (datafellows & SSH_BUG_NOREKEY)
1.109 itojun 869: logit("Server does not support re-keying");
1.59 markus 870: else
871: need_rekeying = 1;
872: }
1.54 markus 873: continue;
874:
1.31 markus 875: case '&':
876: /*
877: * Detach the program (continue to serve connections,
878: * but put in background and no more new connections).
879: */
880: /* Restore tty modes. */
881: leave_raw_mode();
882:
883: /* Stop listening for new connections. */
1.86 markus 884: channel_stop_listening();
1.31 markus 885:
1.86 markus 886: snprintf(string, sizeof string,
887: "%c& [backgrounded]\n", escape_char);
888: buffer_append(berr, string, strlen(string));
1.31 markus 889:
890: /* Fork into background. */
891: pid = fork();
892: if (pid < 0) {
893: error("fork: %.100s", strerror(errno));
894: continue;
895: }
896: if (pid != 0) { /* This is the parent. */
897: /* The parent just exits. */
898: exit(0);
899: }
900: /* The child continues serving connections. */
1.86 markus 901: if (compat20) {
902: buffer_append(bin, "\004", 1);
903: /* fake EOF on stdin */
904: return -1;
905: } else if (!stdin_eof) {
906: /*
907: * Sending SSH_CMSG_EOF alone does not always appear
908: * to be enough. So we try to send an EOF character
909: * first.
910: */
911: packet_start(SSH_CMSG_STDIN_DATA);
912: packet_put_string("\004", 1);
913: packet_send();
914: /* Close stdin. */
915: stdin_eof = 1;
916: if (buffer_len(bin) == 0) {
917: packet_start(SSH_CMSG_EOF);
918: packet_send();
919: }
920: }
921: continue;
1.31 markus 922:
923: case '?':
1.32 markus 924: snprintf(string, sizeof string,
1.31 markus 925: "%c?\r\n\
926: Supported escape sequences:\r\n\
1.104 stevesk 927: %c. - terminate connection\r\n\
1.111 markus 928: %cB - send a BREAK to the remote system\r\n\
1.104 stevesk 929: %cC - open a command line\r\n\
930: %cR - Request rekey (SSH protocol 2 only)\r\n\
931: %c^Z - suspend ssh\r\n\
932: %c# - list forwarded connections\r\n\
933: %c& - background ssh (when waiting for connections to terminate)\r\n\
934: %c? - this message\r\n\
935: %c%c - send the escape character by typing it twice\r\n\
1.31 markus 936: (Note that escapes are only recognized immediately after newline.)\r\n",
1.104 stevesk 937: escape_char, escape_char, escape_char, escape_char,
938: escape_char, escape_char, escape_char, escape_char,
1.111 markus 939: escape_char, escape_char, escape_char);
1.32 markus 940: buffer_append(berr, string, strlen(string));
1.31 markus 941: continue;
942:
943: case '#':
1.32 markus 944: snprintf(string, sizeof string, "%c#\r\n", escape_char);
945: buffer_append(berr, string, strlen(string));
1.31 markus 946: s = channel_open_message();
947: buffer_append(berr, s, strlen(s));
948: xfree(s);
1.97 jakob 949: continue;
950:
951: case 'C':
1.99 markus 952: process_cmdline();
1.31 markus 953: continue;
954:
955: default:
956: if (ch != escape_char) {
957: buffer_put_char(bin, escape_char);
958: bytes++;
959: }
960: /* Escaped characters fall through here */
961: break;
962: }
963: } else {
964: /*
965: * The previous character was not an escape char. Check if this
966: * is an escape.
967: */
968: if (last_was_cr && ch == escape_char) {
969: /* It is. Set the flag and continue to next character. */
970: escape_pending = 1;
971: continue;
972: }
973: }
974:
975: /*
976: * Normal character. Record whether it was a newline,
977: * and append it to the buffer.
978: */
979: last_was_cr = (ch == '\r' || ch == '\n');
980: buffer_put_char(bin, ch);
981: bytes++;
982: }
983: return bytes;
984: }
985:
1.77 itojun 986: static void
1.161 deraadt 987: client_process_input(fd_set *readset)
1.17 markus 988: {
1.21 deraadt 989: int len;
1.31 markus 990: char buf[8192];
1.16 markus 991:
1.11 markus 992: /* Read input from stdin. */
993: if (FD_ISSET(fileno(stdin), readset)) {
994: /* Read as much as possible. */
995: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 996: if (len < 0 && (errno == EAGAIN || errno == EINTR))
997: return; /* we'll try again later */
1.11 markus 998: if (len <= 0) {
1.13 markus 999: /*
1000: * Received EOF or error. They are treated
1001: * similarly, except that an error message is printed
1002: * if it was an error condition.
1003: */
1.11 markus 1004: if (len < 0) {
1005: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
1006: buffer_append(&stderr_buffer, buf, strlen(buf));
1007: }
1008: /* Mark that we have seen EOF. */
1009: stdin_eof = 1;
1.13 markus 1010: /*
1011: * Send an EOF message to the server unless there is
1012: * data in the buffer. If there is data in the
1013: * buffer, no message will be sent now. Code
1014: * elsewhere will send the EOF when the buffer
1015: * becomes empty if stdin_eof is set.
1016: */
1.11 markus 1017: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 1018: packet_start(SSH_CMSG_EOF);
1019: packet_send();
1.11 markus 1020: }
1.72 stevesk 1021: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 1022: /*
1023: * Normal successful read, and no escape character.
1024: * Just append the data to buffer.
1025: */
1.11 markus 1026: buffer_append(&stdin_buffer, buf, len);
1027: } else {
1.13 markus 1028: /*
1029: * Normal, successful read. But we have an escape character
1030: * and have to process the characters one by one.
1031: */
1.52 markus 1032: if (process_escapes(&stdin_buffer, &stdout_buffer,
1033: &stderr_buffer, buf, len) == -1)
1.31 markus 1034: return;
1.11 markus 1035: }
1036: }
1037: }
1038:
1.77 itojun 1039: static void
1.161 deraadt 1040: client_process_output(fd_set *writeset)
1.11 markus 1041: {
1042: int len;
1043: char buf[100];
1.1 deraadt 1044:
1.11 markus 1045: /* Write buffered output to stdout. */
1046: if (FD_ISSET(fileno(stdout), writeset)) {
1047: /* Write as much data as possible. */
1048: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 1049: buffer_len(&stdout_buffer));
1.11 markus 1050: if (len <= 0) {
1.64 markus 1051: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1052: len = 0;
1053: else {
1.13 markus 1054: /*
1055: * An error or EOF was encountered. Put an
1056: * error message to stderr buffer.
1057: */
1.11 markus 1058: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
1059: buffer_append(&stderr_buffer, buf, strlen(buf));
1060: quit_pending = 1;
1061: return;
1062: }
1063: }
1064: /* Consume printed data from the buffer. */
1065: buffer_consume(&stdout_buffer, len);
1.57 markus 1066: stdout_bytes += len;
1.11 markus 1067: }
1068: /* Write buffered output to stderr. */
1069: if (FD_ISSET(fileno(stderr), writeset)) {
1070: /* Write as much data as possible. */
1071: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 1072: buffer_len(&stderr_buffer));
1.11 markus 1073: if (len <= 0) {
1.64 markus 1074: if (errno == EINTR || errno == EAGAIN)
1.11 markus 1075: len = 0;
1076: else {
1.13 markus 1077: /* EOF or error, but can't even print error message. */
1.11 markus 1078: quit_pending = 1;
1079: return;
1080: }
1081: }
1082: /* Consume printed characters from the buffer. */
1083: buffer_consume(&stderr_buffer, len);
1.57 markus 1084: stderr_bytes += len;
1.11 markus 1085: }
1.1 deraadt 1086: }
1087:
1.13 markus 1088: /*
1.15 markus 1089: * Get packets from the connection input buffer, and process them as long as
1090: * there are packets available.
1091: *
1092: * Any unknown packets received during the actual
1093: * session cause the session to terminate. This is
1094: * intended to make debugging easier since no
1095: * confirmations are sent. Any compatible protocol
1096: * extensions must be negotiated during the
1097: * preparatory phase.
1098: */
1099:
1.77 itojun 1100: static void
1.49 itojun 1101: client_process_buffered_input_packets(void)
1.15 markus 1102: {
1.54 markus 1103: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 1104: }
1105:
1.31 markus 1106: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 1107:
1.77 itojun 1108: static int
1.31 markus 1109: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 1110: {
1.190 djm 1111: if (c->extended_usage != CHAN_EXTENDED_WRITE)
1112: return 0;
1113:
1.31 markus 1114: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 1115: }
1116:
1.77 itojun 1117: static void
1.60 markus 1118: client_channel_closed(int id, void *arg)
1119: {
1.83 markus 1120: channel_cancel_cleanup(id);
1.60 markus 1121: session_closed = 1;
1.113 markus 1122: leave_raw_mode();
1.60 markus 1123: }
1124:
1.15 markus 1125: /*
1.13 markus 1126: * Implements the interactive session with the server. This is called after
1127: * the user has been authenticated, and a command has been started on the
1.72 stevesk 1128: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
1129: * used as an escape character for terminating or suspending the session.
1.13 markus 1130: */
1.1 deraadt 1131:
1.20 markus 1132: int
1.30 markus 1133: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 1134: {
1.46 markus 1135: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 1136: double start_time, total_time;
1.130 avsm 1137: int max_fd = 0, max_fd2 = 0, len, rekeying = 0;
1138: u_int nalloc = 0;
1.11 markus 1139: char buf[100];
1140:
1141: debug("Entering interactive session.");
1142:
1143: start_time = get_current_time();
1144:
1145: /* Initialize variables. */
1146: escape_pending = 0;
1147: last_was_cr = 1;
1148: exit_status = -1;
1149: stdin_eof = 0;
1150: buffer_high = 64 * 1024;
1151: connection_in = packet_get_connection_in();
1152: connection_out = packet_get_connection_out();
1.46 markus 1153: max_fd = MAX(connection_in, connection_out);
1.192 djm 1154: if (muxserver_sock != -1)
1155: max_fd = MAX(max_fd, muxserver_sock);
1.46 markus 1156:
1157: if (!compat20) {
1.63 markus 1158: /* enable nonblocking unless tty */
1159: if (!isatty(fileno(stdin)))
1160: set_nonblock(fileno(stdin));
1161: if (!isatty(fileno(stdout)))
1162: set_nonblock(fileno(stdout));
1163: if (!isatty(fileno(stderr)))
1164: set_nonblock(fileno(stderr));
1.46 markus 1165: max_fd = MAX(max_fd, fileno(stdin));
1166: max_fd = MAX(max_fd, fileno(stdout));
1167: max_fd = MAX(max_fd, fileno(stderr));
1168: }
1.11 markus 1169: stdin_bytes = 0;
1170: stdout_bytes = 0;
1171: stderr_bytes = 0;
1172: quit_pending = 0;
1173: escape_char = escape_char_arg;
1174:
1175: /* Initialize buffers. */
1176: buffer_init(&stdin_buffer);
1177: buffer_init(&stdout_buffer);
1178: buffer_init(&stderr_buffer);
1179:
1.15 markus 1180: client_init_dispatch();
1181:
1.105 markus 1182: /*
1183: * Set signal handlers, (e.g. to restore non-blocking mode)
1184: * but don't overwrite SIG_IGN, matches behaviour from rsh(1)
1185: */
1.131 djm 1186: if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
1187: signal(SIGHUP, signal_handler);
1.105 markus 1188: if (signal(SIGINT, SIG_IGN) != SIG_IGN)
1189: signal(SIGINT, signal_handler);
1190: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
1191: signal(SIGQUIT, signal_handler);
1192: if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
1193: signal(SIGTERM, signal_handler);
1.132 djm 1194: signal(SIGWINCH, window_change_handler);
1.11 markus 1195:
1196: if (have_pty)
1197: enter_raw_mode();
1198:
1.48 markus 1199: if (compat20) {
1200: session_ident = ssh2_chan_id;
1.72 stevesk 1201: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 1202: channel_register_filter(session_ident,
1.149 reyk 1203: simple_escape_filter, NULL);
1.60 markus 1204: if (session_ident != -1)
1205: channel_register_cleanup(session_ident,
1.143 djm 1206: client_channel_closed, 0);
1.48 markus 1207: } else {
1208: /* Check if we should immediately send eof on stdin. */
1.16 markus 1209: client_check_initial_eof_on_stdin();
1.48 markus 1210: }
1.30 markus 1211:
1.11 markus 1212: /* Main loop of the client for the interactive session mode. */
1213: while (!quit_pending) {
1214:
1.13 markus 1215: /* Process buffered packets sent by the server. */
1.11 markus 1216: client_process_buffered_input_packets();
1217:
1.60 markus 1218: if (compat20 && session_closed && !channel_still_open())
1219: break;
1220:
1.56 markus 1221: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 1222:
1.56 markus 1223: if (rekeying) {
1224: debug("rekeying in progress");
1225: } else {
1226: /*
1227: * Make packets of buffered stdin data, and buffer
1228: * them for sending to the server.
1229: */
1230: if (!compat20)
1231: client_make_packets_from_stdin_data();
1.11 markus 1232:
1.56 markus 1233: /*
1234: * Make packets from buffered channel data, and
1235: * enqueue them for sending to the server.
1236: */
1237: if (packet_not_very_much_data_to_write())
1238: channel_output_poll();
1.11 markus 1239:
1.56 markus 1240: /*
1241: * Check if the window size has changed, and buffer a
1242: * message about it to the server if so.
1243: */
1244: client_check_window_change();
1.11 markus 1245:
1.56 markus 1246: if (quit_pending)
1247: break;
1248: }
1.13 markus 1249: /*
1250: * Wait until we have something to do (something becomes
1251: * available on one of the descriptors).
1252: */
1.81 markus 1253: max_fd2 = max_fd;
1.56 markus 1254: client_wait_until_can_do_something(&readset, &writeset,
1.81 markus 1255: &max_fd2, &nalloc, rekeying);
1.11 markus 1256:
1257: if (quit_pending)
1258: break;
1259:
1.56 markus 1260: /* Do channel operations unless rekeying in progress. */
1261: if (!rekeying) {
1262: channel_after_select(readset, writeset);
1.108 markus 1263: if (need_rekeying || packet_need_rekeying()) {
1264: debug("need rekeying");
1.56 markus 1265: xxx_kex->done = 0;
1266: kex_send_kexinit(xxx_kex);
1267: need_rekeying = 0;
1268: }
1269: }
1.11 markus 1270:
1.17 markus 1271: /* Buffer input from the connection. */
1.46 markus 1272: client_process_net_input(readset);
1.17 markus 1273:
1.123 djm 1274: /* Accept control connections. */
1.192 djm 1275: if (muxserver_sock != -1 &&FD_ISSET(muxserver_sock, readset)) {
1276: if (muxserver_accept_control())
1277: quit_pending = 1;
1278: }
1.123 djm 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;
1471:
1472: /* Get rest of the packet */
1473: listen_address = packet_get_string(NULL);
1474: listen_port = packet_get_int();
1475: originator_address = packet_get_string(NULL);
1476: originator_port = packet_get_int();
1.93 markus 1477: packet_check_eom();
1.40 markus 1478:
1.191 djm 1479: debug("client_request_forwarded_tcpip: listen %s port %d, "
1480: "originator %s port %d", listen_address, listen_port,
1481: originator_address, originator_port);
1482:
1483: c = channel_connect_by_listen_address(listen_port,
1484: "forwarded-tcpip", originator_address);
1.40 markus 1485:
1486: xfree(originator_address);
1487: xfree(listen_address);
1488: return c;
1489: }
1490:
1.103 deraadt 1491: static Channel *
1.40 markus 1492: client_request_x11(const char *request_type, int rchan)
1493: {
1494: Channel *c = NULL;
1495: char *originator;
1496: int originator_port;
1.67 markus 1497: int sock;
1.40 markus 1498:
1499: if (!options.forward_x11) {
1500: error("Warning: ssh server tried X11 forwarding.");
1.148 stevesk 1501: error("Warning: this is probably a break-in attempt by a malicious server.");
1.40 markus 1502: return NULL;
1503: }
1504: originator = packet_get_string(NULL);
1505: if (datafellows & SSH_BUG_X11FWD) {
1506: debug2("buggy server: x11 request w/o originator_port");
1507: originator_port = 0;
1508: } else {
1509: originator_port = packet_get_int();
1510: }
1.93 markus 1511: packet_check_eom();
1.40 markus 1512: /* XXX check permission */
1.47 markus 1513: debug("client_request_x11: request from %s %d", originator,
1514: originator_port);
1.67 markus 1515: xfree(originator);
1.40 markus 1516: sock = x11_connect_display();
1.67 markus 1517: if (sock < 0)
1518: return NULL;
1519: c = channel_new("x11",
1520: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1.110 markus 1521: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
1.82 markus 1522: c->force_drain = 1;
1.40 markus 1523: return c;
1524: }
1525:
1.103 deraadt 1526: static Channel *
1.40 markus 1527: client_request_agent(const char *request_type, int rchan)
1528: {
1529: Channel *c = NULL;
1.67 markus 1530: int sock;
1.40 markus 1531:
1532: if (!options.forward_agent) {
1533: error("Warning: ssh server tried agent forwarding.");
1.148 stevesk 1534: error("Warning: this is probably a break-in attempt by a malicious server.");
1.40 markus 1535: return NULL;
1536: }
1.177 stevesk 1537: sock = ssh_get_authentication_socket();
1.67 markus 1538: if (sock < 0)
1539: return NULL;
1540: c = channel_new("authentication agent connection",
1541: SSH_CHANNEL_OPEN, sock, sock, -1,
1.185 dtucker 1542: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
1.110 markus 1543: "authentication agent connection", 1);
1.82 markus 1544: c->force_drain = 1;
1.40 markus 1545: return c;
1.180 djm 1546: }
1547:
1548: int
1549: client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun)
1550: {
1551: Channel *c;
1552: int fd;
1553:
1554: if (tun_mode == SSH_TUNMODE_NO)
1555: return 0;
1556:
1557: if (!compat20) {
1558: error("Tunnel forwarding is not support for protocol 1");
1559: return -1;
1560: }
1561:
1562: debug("Requesting tun unit %d in mode %d", local_tun, tun_mode);
1563:
1564: /* Open local tunnel device */
1565: if ((fd = tun_open(local_tun, tun_mode)) == -1) {
1566: error("Tunnel device open failed.");
1567: return -1;
1568: }
1569:
1570: c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
1571: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
1572: c->datagram = 1;
1573:
1574: packet_start(SSH2_MSG_CHANNEL_OPEN);
1575: packet_put_cstring("tun@openssh.com");
1576: packet_put_int(c->self);
1577: packet_put_int(c->local_window_max);
1578: packet_put_int(c->local_maxpacket);
1579: packet_put_int(tun_mode);
1580: packet_put_int(remote_tun);
1581: packet_send();
1582:
1583: return 0;
1.40 markus 1584: }
1585:
1.22 markus 1586: /* XXXX move to generic input handler */
1.77 itojun 1587: static void
1.94 markus 1588: client_input_channel_open(int type, u_int32_t seq, void *ctxt)
1.22 markus 1589: {
1590: Channel *c = NULL;
1591: char *ctype;
1592: int rchan;
1.102 markus 1593: u_int rmaxpack, rwindow, len;
1.22 markus 1594:
1595: ctype = packet_get_string(&len);
1596: rchan = packet_get_int();
1597: rwindow = packet_get_int();
1598: rmaxpack = packet_get_int();
1599:
1.24 markus 1600: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1601: ctype, rchan, rwindow, rmaxpack);
1602:
1.40 markus 1603: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1604: c = client_request_forwarded_tcpip(ctype, rchan);
1605: } else if (strcmp(ctype, "x11") == 0) {
1606: c = client_request_x11(ctype, rchan);
1607: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1608: c = client_request_agent(ctype, rchan);
1.22 markus 1609: }
1610: /* XXX duplicate : */
1611: if (c != NULL) {
1612: debug("confirm %s", ctype);
1613: c->remote_id = rchan;
1614: c->remote_window = rwindow;
1615: c->remote_maxpacket = rmaxpack;
1.69 markus 1616: if (c->type != SSH_CHANNEL_CONNECTING) {
1617: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1618: packet_put_int(c->remote_id);
1619: packet_put_int(c->self);
1620: packet_put_int(c->local_window);
1621: packet_put_int(c->local_maxpacket);
1622: packet_send();
1623: }
1.22 markus 1624: } else {
1625: debug("failure %s", ctype);
1626: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1627: packet_put_int(rchan);
1628: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1629: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1630: packet_put_cstring("open failed");
1.66 markus 1631: packet_put_cstring("");
1632: }
1.22 markus 1633: packet_send();
1634: }
1635: xfree(ctype);
1636: }
1.77 itojun 1637: static void
1.94 markus 1638: client_input_channel_req(int type, u_int32_t seq, void *ctxt)
1.48 markus 1639: {
1640: Channel *c = NULL;
1.123 djm 1641: int exitval, id, reply, success = 0;
1.48 markus 1642: char *rtype;
1643:
1644: id = packet_get_int();
1645: rtype = packet_get_string(NULL);
1646: reply = packet_get_char();
1647:
1648: debug("client_input_channel_req: channel %d rtype %s reply %d",
1649: id, rtype, reply);
1650:
1.128 djm 1651: if (id == -1) {
1652: error("client_input_channel_req: request for channel -1");
1653: } else if ((c = channel_lookup(id)) == NULL) {
1.48 markus 1654: error("client_input_channel_req: channel %d: unknown channel", id);
1.193 ! markus 1655: } else if (strcmp(rtype, "eow@openssh.com") == 0) {
! 1656: packet_check_eom();
! 1657: chan_rcvd_eow(c);
1.48 markus 1658: } else if (strcmp(rtype, "exit-status") == 0) {
1.123 djm 1659: exitval = packet_get_int();
1660: if (id == session_ident) {
1661: success = 1;
1662: exit_status = exitval;
1663: } else if (c->ctl_fd == -1) {
1664: error("client_input_channel_req: unexpected channel %d",
1665: session_ident);
1666: } else {
1667: atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
1668: success = 1;
1669: }
1.93 markus 1670: packet_check_eom();
1.48 markus 1671: }
1672: if (reply) {
1673: packet_start(success ?
1674: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1.128 djm 1675: packet_put_int(id);
1.48 markus 1676: packet_send();
1677: }
1678: xfree(rtype);
1679: }
1.95 markus 1680: static void
1681: client_input_global_request(int type, u_int32_t seq, void *ctxt)
1682: {
1683: char *rtype;
1684: int want_reply;
1685: int success = 0;
1686:
1687: rtype = packet_get_string(NULL);
1688: want_reply = packet_get_char();
1.117 markus 1689: debug("client_input_global_request: rtype %s want_reply %d",
1690: rtype, want_reply);
1.95 markus 1691: if (want_reply) {
1692: packet_start(success ?
1693: SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1694: packet_send();
1695: packet_write_wait();
1696: }
1697: xfree(rtype);
1698: }
1.22 markus 1699:
1.123 djm 1700: void
1.129 deraadt 1701: client_session2_setup(int id, int want_tty, int want_subsystem,
1.190 djm 1702: const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env)
1.123 djm 1703: {
1704: int len;
1.132 djm 1705: Channel *c = NULL;
1.123 djm 1706:
1707: debug2("%s: id %d", __func__, id);
1708:
1.132 djm 1709: if ((c = channel_lookup(id)) == NULL)
1710: fatal("client_session2_setup: channel %d: unknown channel", id);
1711:
1.123 djm 1712: if (want_tty) {
1713: struct winsize ws;
1714: struct termios tio;
1715:
1716: /* Store window size in the packet. */
1717: if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
1718: memset(&ws, 0, sizeof(ws));
1719:
1.190 djm 1720: channel_request_start(id, "pty-req", 1);
1721: client_expect_confirm(id, "PTY allocation", 0);
1.123 djm 1722: packet_put_cstring(term != NULL ? term : "");
1.158 deraadt 1723: packet_put_int((u_int)ws.ws_col);
1724: packet_put_int((u_int)ws.ws_row);
1725: packet_put_int((u_int)ws.ws_xpixel);
1726: packet_put_int((u_int)ws.ws_ypixel);
1.123 djm 1727: tio = get_saved_tio();
1728: tty_make_modes(-1, tiop != NULL ? tiop : &tio);
1729: packet_send();
1730: /* XXX wait for reply */
1.132 djm 1731: c->client_tty = 1;
1.123 djm 1732: }
1733:
1734: /* Transfer any environment variables from client to server */
1.126 djm 1735: if (options.num_send_env != 0 && env != NULL) {
1.123 djm 1736: int i, j, matched;
1737: char *name, *val;
1738:
1739: debug("Sending environment.");
1.126 djm 1740: for (i = 0; env[i] != NULL; i++) {
1.123 djm 1741: /* Split */
1.126 djm 1742: name = xstrdup(env[i]);
1.123 djm 1743: if ((val = strchr(name, '=')) == NULL) {
1.144 stevesk 1744: xfree(name);
1.123 djm 1745: continue;
1746: }
1747: *val++ = '\0';
1748:
1749: matched = 0;
1750: for (j = 0; j < options.num_send_env; j++) {
1751: if (match_pattern(name, options.send_env[j])) {
1752: matched = 1;
1753: break;
1754: }
1755: }
1756: if (!matched) {
1757: debug3("Ignored env %s", name);
1.144 stevesk 1758: xfree(name);
1.123 djm 1759: continue;
1760: }
1761:
1762: debug("Sending env %s = %s", name, val);
1763: channel_request_start(id, "env", 0);
1764: packet_put_cstring(name);
1765: packet_put_cstring(val);
1766: packet_send();
1.144 stevesk 1767: xfree(name);
1.123 djm 1768: }
1769: }
1770:
1771: len = buffer_len(cmd);
1772: if (len > 0) {
1773: if (len > 900)
1774: len = 900;
1775: if (want_subsystem) {
1.190 djm 1776: debug("Sending subsystem: %.*s",
1777: len, (u_char*)buffer_ptr(cmd));
1778: channel_request_start(id, "subsystem", 1);
1779: client_expect_confirm(id, "subsystem", 1);
1.123 djm 1780: } else {
1.190 djm 1781: debug("Sending command: %.*s",
1782: len, (u_char*)buffer_ptr(cmd));
1783: channel_request_start(id, "exec", 1);
1784: client_expect_confirm(id, "exec", 1);
1.123 djm 1785: }
1786: packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
1787: packet_send();
1788: } else {
1.190 djm 1789: channel_request_start(id, "shell", 1);
1790: client_expect_confirm(id, "shell", 1);
1.123 djm 1791: packet_send();
1792: }
1793: }
1794:
1.77 itojun 1795: static void
1.49 itojun 1796: client_init_dispatch_20(void)
1.16 markus 1797: {
1.55 markus 1798: dispatch_init(&dispatch_protocol_error);
1.100 markus 1799:
1.16 markus 1800: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1801: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1802: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1803: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1804: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1805: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1806: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1807: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1808: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.189 djm 1809: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm);
1810: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm);
1.95 markus 1811: dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
1.55 markus 1812:
1813: /* rekeying */
1814: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.100 markus 1815:
1816: /* global request reply messages */
1817: dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
1818: dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
1.16 markus 1819: }
1.77 itojun 1820: static void
1.49 itojun 1821: client_init_dispatch_13(void)
1.15 markus 1822: {
1823: dispatch_init(NULL);
1824: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1825: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1826: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1827: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1828: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1829: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1830: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1831: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1832: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1833:
1834: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1.115 markus 1835: &client_input_agent_open : &deny_input_open);
1.39 markus 1836: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1837: &x11_input_open : &deny_input_open);
1.15 markus 1838: }
1.77 itojun 1839: static void
1.49 itojun 1840: client_init_dispatch_15(void)
1.15 markus 1841: {
1842: client_init_dispatch_13();
1843: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1844: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1845: }
1.79 stevesk 1846: static void
1.49 itojun 1847: client_init_dispatch(void)
1.15 markus 1848: {
1.16 markus 1849: if (compat20)
1850: client_init_dispatch_20();
1851: else if (compat13)
1.15 markus 1852: client_init_dispatch_13();
1853: else
1854: client_init_dispatch_15();
1.113 markus 1855: }
1856:
1857: /* client specific fatal cleanup */
1858: void
1.114 markus 1859: cleanup_exit(int i)
1.113 markus 1860: {
1861: leave_raw_mode();
1862: leave_non_blocking();
1.192 djm 1863: if (options.control_path != NULL && muxserver_sock != -1)
1.123 djm 1864: unlink(options.control_path);
1.114 markus 1865: _exit(i);
1.1 deraadt 1866: }
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