blob: 285f314eb19047abf8bba6f66f10e837ecbc95ee [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Server main loop for handling the interactive session.
Damien Millere4340be2000-09-16 13:29:08 +11006 *
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 *
Damien Millerefb4afe2000-04-12 18:45:05 +100013 * SSH2 support by Markus Friedl.
14 * Copyright (c) 2000 Markus Friedl. All rights reserved.
Damien Millere4340be2000-09-16 13:29:08 +110015 *
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.
Damien Millerefb4afe2000-04-12 18:45:05 +100035 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100036
37#include "includes.h"
Ben Lindstrome229b252001-03-05 06:28:06 +000038RCSID("$OpenBSD: serverloop.c,v 1.52 2001/02/28 21:27:48 markus Exp $");
Damien Miller69b69aa2000-10-28 14:19:58 +110039
Damien Millerd4a8b7e1999-10-27 13:42:43 +100040#include "xmalloc.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100041#include "packet.h"
42#include "buffer.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000043#include "log.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100044#include "servconf.h"
Ben Lindstromd95c09c2001-02-18 19:13:33 +000045#include "sshpty.h"
Damien Millerb38eff82000-04-01 11:09:21 +100046#include "channels.h"
Damien Millerb38eff82000-04-01 11:09:21 +100047#include "compat.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000048#include "ssh1.h"
Damien Millerefb4afe2000-04-12 18:45:05 +100049#include "ssh2.h"
Ben Lindstromdb65e8f2001-01-19 04:26:52 +000050#include "auth.h"
Damien Millerefb4afe2000-04-12 18:45:05 +100051#include "session.h"
Damien Millerb38eff82000-04-01 11:09:21 +100052#include "dispatch.h"
Damien Millerf6d9e222000-06-18 14:50:44 +100053#include "auth-options.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000054#include "serverloop.h"
55#include "misc.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100056
Damien Miller50a41ed2000-10-16 12:14:42 +110057extern ServerOptions options;
58
Damien Millerd4a8b7e1999-10-27 13:42:43 +100059static Buffer stdin_buffer; /* Buffer for stdin data. */
60static Buffer stdout_buffer; /* Buffer for stdout data. */
61static Buffer stderr_buffer; /* Buffer for stderr data. */
62static int fdin; /* Descriptor for stdin (for writing) */
63static int fdout; /* Descriptor for stdout (for reading);
64 May be same number as fdin. */
65static int fderr; /* Descriptor for stderr. May be -1. */
66static long stdin_bytes = 0; /* Number of bytes written to stdin. */
67static long stdout_bytes = 0; /* Number of stdout bytes sent to client. */
68static long stderr_bytes = 0; /* Number of stderr bytes sent to client. */
69static long fdout_bytes = 0; /* Number of stdout bytes read from program. */
70static int stdin_eof = 0; /* EOF message received from client. */
71static int fdout_eof = 0; /* EOF encountered reading from fdout. */
72static int fderr_eof = 0; /* EOF encountered readung from fderr. */
Damien Miller225736c2001-02-19 21:51:08 +110073static int fdin_is_tty = 0; /* fdin points to a tty. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100074static int connection_in; /* Connection to client (input). */
75static int connection_out; /* Connection to client (output). */
Ben Lindstrom46c16222000-12-22 01:43:59 +000076static u_int buffer_high;/* "Soft" max buffer size. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100077
Damien Miller5428f641999-11-25 11:54:57 +110078/*
79 * This SIGCHLD kludge is used to detect when the child exits. The server
80 * will exit after that, as soon as forwarded connections have terminated.
81 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100082
Damien Miller166fca82000-04-20 07:42:21 +100083static pid_t child_pid; /* Pid of the child. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100084static volatile int child_terminated; /* The child has terminated. */
85static volatile int child_wait_status; /* Status from wait(). */
86
Damien Millerb38eff82000-04-01 11:09:21 +100087void server_init_dispatch(void);
88
Damien Miller4af51302000-04-16 11:18:38 +100089void
Damien Miller95def091999-11-25 00:26:21 +110090sigchld_handler(int sig)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100091{
Damien Miller95def091999-11-25 00:26:21 +110092 int save_errno = errno;
Damien Miller166fca82000-04-20 07:42:21 +100093 pid_t wait_pid;
94
Damien Miller95def091999-11-25 00:26:21 +110095 debug("Received SIGCHLD.");
96 wait_pid = wait((int *) &child_wait_status);
97 if (wait_pid != -1) {
98 if (wait_pid != child_pid)
99 error("Strange, got SIGCHLD and wait returned pid %d but child is %d",
100 wait_pid, child_pid);
101 if (WIFEXITED(child_wait_status) ||
Damien Miller43dc8da2000-11-29 15:55:17 +1100102 WIFSIGNALED(child_wait_status))
Damien Miller95def091999-11-25 00:26:21 +1100103 child_terminated = 1;
104 }
105 signal(SIGCHLD, sigchld_handler);
106 errno = save_errno;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000107}
Damien Miller4af51302000-04-16 11:18:38 +1000108void
Damien Millerefb4afe2000-04-12 18:45:05 +1000109sigchld_handler2(int sig)
110{
111 int save_errno = errno;
112 debug("Received SIGCHLD.");
113 child_terminated = 1;
Kevin Stevesb6e773a2001-02-04 13:20:36 +0000114 mysignal(SIGCHLD, sigchld_handler2);
Damien Millerefb4afe2000-04-12 18:45:05 +1000115 errno = save_errno;
116}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000117
Damien Miller95def091999-11-25 00:26:21 +1100118/*
Damien Miller95def091999-11-25 00:26:21 +1100119 * Make packets from buffered stderr data, and buffer it for sending
120 * to the client.
121 */
Damien Miller4af51302000-04-16 11:18:38 +1000122void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000123make_packets_from_stderr_data(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000124{
Damien Miller95def091999-11-25 00:26:21 +1100125 int len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000126
Damien Miller95def091999-11-25 00:26:21 +1100127 /* Send buffered stderr data to the client. */
128 while (buffer_len(&stderr_buffer) > 0 &&
Damien Miller037a0dc1999-12-07 15:38:31 +1100129 packet_not_very_much_data_to_write()) {
Damien Miller95def091999-11-25 00:26:21 +1100130 len = buffer_len(&stderr_buffer);
131 if (packet_is_interactive()) {
132 if (len > 512)
133 len = 512;
134 } else {
135 /* Keep the packets at reasonable size. */
136 if (len > packet_get_maxsize())
137 len = packet_get_maxsize();
138 }
139 packet_start(SSH_SMSG_STDERR_DATA);
140 packet_put_string(buffer_ptr(&stderr_buffer), len);
141 packet_send();
142 buffer_consume(&stderr_buffer, len);
143 stderr_bytes += len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000144 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000145}
146
Damien Miller95def091999-11-25 00:26:21 +1100147/*
148 * Make packets from buffered stdout data, and buffer it for sending to the
149 * client.
150 */
Damien Miller4af51302000-04-16 11:18:38 +1000151void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000152make_packets_from_stdout_data(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000153{
Damien Miller95def091999-11-25 00:26:21 +1100154 int len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000155
Damien Miller95def091999-11-25 00:26:21 +1100156 /* Send buffered stdout data to the client. */
157 while (buffer_len(&stdout_buffer) > 0 &&
Damien Miller037a0dc1999-12-07 15:38:31 +1100158 packet_not_very_much_data_to_write()) {
Damien Miller95def091999-11-25 00:26:21 +1100159 len = buffer_len(&stdout_buffer);
160 if (packet_is_interactive()) {
161 if (len > 512)
162 len = 512;
163 } else {
164 /* Keep the packets at reasonable size. */
165 if (len > packet_get_maxsize())
Kevin Stevesef4eea92001-02-05 12:42:17 +0000166 len = packet_get_maxsize();
Damien Miller95def091999-11-25 00:26:21 +1100167 }
168 packet_start(SSH_SMSG_STDOUT_DATA);
169 packet_put_string(buffer_ptr(&stdout_buffer), len);
170 packet_send();
171 buffer_consume(&stdout_buffer, len);
172 stdout_bytes += len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000173 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000174}
175
Damien Miller95def091999-11-25 00:26:21 +1100176/*
177 * Sleep in select() until we can do something. This will initialize the
178 * select masks. Upon return, the masks will indicate which descriptors
179 * have data or can accept data. Optionally, a maximum time can be specified
180 * for the duration of the wait (0 = infinite).
181 */
Damien Miller4af51302000-04-16 11:18:38 +1000182void
Damien Miller5e953212001-01-30 09:14:00 +1100183wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp,
184 u_int max_time_milliseconds)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000185{
Damien Miller95def091999-11-25 00:26:21 +1100186 struct timeval tv, *tvp;
187 int ret;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000188
Damien Miller95def091999-11-25 00:26:21 +1100189 /* When select fails we restart from here. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000190retry_select:
191
Damien Miller5e953212001-01-30 09:14:00 +1100192 /* Allocate and update select() masks for channel descriptors. */
193 channel_prepare_select(readsetp, writesetp, maxfdp);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000194
Damien Millerefb4afe2000-04-12 18:45:05 +1000195 if (compat20) {
Damien Millere247cc42000-05-07 12:03:14 +1000196 /* wrong: bad condition XXX */
Damien Millerefb4afe2000-04-12 18:45:05 +1000197 if (channel_not_very_much_buffered_data())
Damien Miller5e953212001-01-30 09:14:00 +1100198 FD_SET(connection_in, *readsetp);
Damien Millerefb4afe2000-04-12 18:45:05 +1000199 } else {
Damien Millerb1715dc2000-05-30 13:44:51 +1000200 /*
201 * Read packets from the client unless we have too much
202 * buffered stdin or channel data.
203 */
204 if (buffer_len(&stdin_buffer) < buffer_high &&
Damien Millerefb4afe2000-04-12 18:45:05 +1000205 channel_not_very_much_buffered_data())
Damien Miller5e953212001-01-30 09:14:00 +1100206 FD_SET(connection_in, *readsetp);
Damien Millerb1715dc2000-05-30 13:44:51 +1000207 /*
208 * If there is not too much data already buffered going to
209 * the client, try to get some more data from the program.
210 */
211 if (packet_not_very_much_data_to_write()) {
212 if (!fdout_eof)
Damien Miller5e953212001-01-30 09:14:00 +1100213 FD_SET(fdout, *readsetp);
Damien Millerb1715dc2000-05-30 13:44:51 +1000214 if (!fderr_eof)
Damien Miller5e953212001-01-30 09:14:00 +1100215 FD_SET(fderr, *readsetp);
Damien Millerb1715dc2000-05-30 13:44:51 +1000216 }
217 /*
218 * If we have buffered data, try to write some of that data
219 * to the program.
220 */
221 if (fdin != -1 && buffer_len(&stdin_buffer) > 0)
Damien Miller5e953212001-01-30 09:14:00 +1100222 FD_SET(fdin, *writesetp);
Damien Millerefb4afe2000-04-12 18:45:05 +1000223 }
Damien Miller95def091999-11-25 00:26:21 +1100224
Damien Miller5428f641999-11-25 11:54:57 +1100225 /*
226 * If we have buffered packet data going to the client, mark that
227 * descriptor.
228 */
Damien Miller95def091999-11-25 00:26:21 +1100229 if (packet_have_data_to_write())
Damien Miller5e953212001-01-30 09:14:00 +1100230 FD_SET(connection_out, *writesetp);
Damien Miller95def091999-11-25 00:26:21 +1100231
Damien Miller5428f641999-11-25 11:54:57 +1100232 /*
233 * If child has terminated and there is enough buffer space to read
234 * from it, then read as much as is available and exit.
235 */
Damien Miller95def091999-11-25 00:26:21 +1100236 if (child_terminated && packet_not_very_much_data_to_write())
237 if (max_time_milliseconds == 0)
238 max_time_milliseconds = 100;
239
240 if (max_time_milliseconds == 0)
241 tvp = NULL;
242 else {
243 tv.tv_sec = max_time_milliseconds / 1000;
244 tv.tv_usec = 1000 * (max_time_milliseconds % 1000);
245 tvp = &tv;
246 }
Damien Millerefb4afe2000-04-12 18:45:05 +1000247 if (tvp!=NULL)
Ben Lindstromf4c73112001-03-05 05:58:23 +0000248 debug3("tvp!=NULL kid %d mili %d", child_terminated, max_time_milliseconds);
Damien Miller95def091999-11-25 00:26:21 +1100249
250 /* Wait for something to happen, or the timeout to expire. */
Damien Miller5e953212001-01-30 09:14:00 +1100251 ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp);
Damien Miller95def091999-11-25 00:26:21 +1100252
253 if (ret < 0) {
254 if (errno != EINTR)
255 error("select: %.100s", strerror(errno));
256 else
257 goto retry_select;
258 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000259}
260
Damien Miller95def091999-11-25 00:26:21 +1100261/*
262 * Processes input from the client and the program. Input data is stored
263 * in buffers and processed later.
264 */
Damien Miller4af51302000-04-16 11:18:38 +1000265void
Damien Miller95def091999-11-25 00:26:21 +1100266process_input(fd_set * readset)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000267{
Damien Miller95def091999-11-25 00:26:21 +1100268 int len;
269 char buf[16384];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000270
Damien Miller95def091999-11-25 00:26:21 +1100271 /* Read and buffer any input data from the client. */
272 if (FD_ISSET(connection_in, readset)) {
273 len = read(connection_in, buf, sizeof(buf));
274 if (len == 0) {
275 verbose("Connection closed by remote host.");
276 fatal_cleanup();
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000277 } else if (len < 0) {
278 if (errno != EINTR && errno != EAGAIN) {
279 verbose("Read error from remote host: %.100s", strerror(errno));
280 fatal_cleanup();
281 }
282 } else {
283 /* Buffer any received data. */
284 packet_process_incoming(buf, len);
Damien Miller95def091999-11-25 00:26:21 +1100285 }
Damien Miller95def091999-11-25 00:26:21 +1100286 }
Damien Millerefb4afe2000-04-12 18:45:05 +1000287 if (compat20)
288 return;
289
Damien Miller95def091999-11-25 00:26:21 +1100290 /* Read and buffer any available stdout data from the program. */
291 if (!fdout_eof && FD_ISSET(fdout, readset)) {
292 len = read(fdout, buf, sizeof(buf));
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000293 if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
294 /* do nothing */
295 } else if (len <= 0) {
Damien Miller95def091999-11-25 00:26:21 +1100296 fdout_eof = 1;
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000297 } else {
Damien Miller95def091999-11-25 00:26:21 +1100298 buffer_append(&stdout_buffer, buf, len);
299 fdout_bytes += len;
300 }
301 }
302 /* Read and buffer any available stderr data from the program. */
303 if (!fderr_eof && FD_ISSET(fderr, readset)) {
304 len = read(fderr, buf, sizeof(buf));
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000305 if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
306 /* do nothing */
307 } else if (len <= 0) {
Damien Miller95def091999-11-25 00:26:21 +1100308 fderr_eof = 1;
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000309 } else {
Damien Miller95def091999-11-25 00:26:21 +1100310 buffer_append(&stderr_buffer, buf, len);
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000311 }
Damien Miller95def091999-11-25 00:26:21 +1100312 }
313}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000314
Damien Miller95def091999-11-25 00:26:21 +1100315/*
316 * Sends data from internal buffers to client program stdin.
317 */
Damien Miller4af51302000-04-16 11:18:38 +1000318void
Damien Miller95def091999-11-25 00:26:21 +1100319process_output(fd_set * writeset)
320{
Ben Lindstromaa630de2001-02-10 23:44:47 +0000321 struct termios tio;
Damien Miller95def091999-11-25 00:26:21 +1100322 int len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000323
Damien Miller95def091999-11-25 00:26:21 +1100324 /* Write buffered data to program stdin. */
Damien Millerefb4afe2000-04-12 18:45:05 +1000325 if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) {
Damien Miller95def091999-11-25 00:26:21 +1100326 len = write(fdin, buffer_ptr(&stdin_buffer),
Damien Miller037a0dc1999-12-07 15:38:31 +1100327 buffer_len(&stdin_buffer));
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000328 if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
329 /* do nothing */
330 } else if (len <= 0) {
Damien Miller95def091999-11-25 00:26:21 +1100331#ifdef USE_PIPES
332 close(fdin);
333#else
Damien Millerb38eff82000-04-01 11:09:21 +1000334 if (fdin != fdout)
Damien Miller95def091999-11-25 00:26:21 +1100335 close(fdin);
336 else
337 shutdown(fdin, SHUT_WR); /* We will no longer send. */
338#endif
339 fdin = -1;
340 } else {
Ben Lindstromaa630de2001-02-10 23:44:47 +0000341 /* Successful write. */
Damien Miller225736c2001-02-19 21:51:08 +1100342 if (fdin_is_tty && tcgetattr(fdin, &tio) == 0 &&
Damien Miller79438cc2001-02-16 12:34:57 +1100343 !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) {
Kevin Stevesb7f036f2001-02-15 17:27:15 +0000344 /*
345 * Simulate echo to reduce the impact of
346 * traffic analysis
347 */
Ben Lindstrome229b252001-03-05 06:28:06 +0000348 packet_send_ignore(len);
Ben Lindstromaa630de2001-02-10 23:44:47 +0000349 packet_send();
350 }
351 /* Consume the data from the buffer. */
Damien Miller95def091999-11-25 00:26:21 +1100352 buffer_consume(&stdin_buffer, len);
353 /* Update the count of bytes written to the program. */
354 stdin_bytes += len;
355 }
356 }
357 /* Send any buffered packet data to the client. */
358 if (FD_ISSET(connection_out, writeset))
359 packet_write_poll();
360}
361
362/*
363 * Wait until all buffered output has been sent to the client.
364 * This is used when the program terminates.
365 */
Damien Miller4af51302000-04-16 11:18:38 +1000366void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000367drain_output(void)
Damien Miller95def091999-11-25 00:26:21 +1100368{
369 /* Send any buffered stdout data to the client. */
370 if (buffer_len(&stdout_buffer) > 0) {
371 packet_start(SSH_SMSG_STDOUT_DATA);
372 packet_put_string(buffer_ptr(&stdout_buffer),
373 buffer_len(&stdout_buffer));
374 packet_send();
375 /* Update the count of sent bytes. */
376 stdout_bytes += buffer_len(&stdout_buffer);
377 }
378 /* Send any buffered stderr data to the client. */
379 if (buffer_len(&stderr_buffer) > 0) {
380 packet_start(SSH_SMSG_STDERR_DATA);
381 packet_put_string(buffer_ptr(&stderr_buffer),
382 buffer_len(&stderr_buffer));
383 packet_send();
384 /* Update the count of sent bytes. */
385 stderr_bytes += buffer_len(&stderr_buffer);
386 }
387 /* Wait until all buffered data has been written to the client. */
388 packet_write_wait();
389}
390
Damien Miller4af51302000-04-16 11:18:38 +1000391void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000392process_buffered_input_packets(void)
Damien Millerb38eff82000-04-01 11:09:21 +1000393{
Damien Miller62cee002000-09-23 17:15:56 +1100394 dispatch_run(DISPATCH_NONBLOCK, NULL, NULL);
Damien Millerb38eff82000-04-01 11:09:21 +1000395}
396
Damien Miller95def091999-11-25 00:26:21 +1100397/*
398 * Performs the interactive session. This handles data transmission between
399 * the client and the program. Note that the notion of stdin, stdout, and
400 * stderr in this function is sort of reversed: this function writes to
401 * stdin (of the child program), and reads from stdout and stderr (of the
402 * child program).
403 */
Damien Miller4af51302000-04-16 11:18:38 +1000404void
Damien Miller166fca82000-04-20 07:42:21 +1000405server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg)
Damien Miller95def091999-11-25 00:26:21 +1100406{
Damien Miller5e953212001-01-30 09:14:00 +1100407 fd_set *readset = NULL, *writeset = NULL;
408 int max_fd;
Damien Miller166fca82000-04-20 07:42:21 +1000409 int wait_status; /* Status returned by wait(). */
410 pid_t wait_pid; /* pid returned by wait(). */
Damien Miller95def091999-11-25 00:26:21 +1100411 int waiting_termination = 0; /* Have displayed waiting close message. */
Ben Lindstrom46c16222000-12-22 01:43:59 +0000412 u_int max_time_milliseconds;
413 u_int previous_stdout_buffer_bytes;
414 u_int stdout_buffer_bytes;
Damien Miller95def091999-11-25 00:26:21 +1100415 int type;
416
417 debug("Entering interactive session.");
418
419 /* Initialize the SIGCHLD kludge. */
420 child_pid = pid;
421 child_terminated = 0;
422 signal(SIGCHLD, sigchld_handler);
Damien Millercf3888d2000-09-30 14:17:52 +1100423 signal(SIGPIPE, SIG_IGN);
Damien Miller95def091999-11-25 00:26:21 +1100424
425 /* Initialize our global variables. */
426 fdin = fdin_arg;
427 fdout = fdout_arg;
428 fderr = fderr_arg;
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000429
430 /* nonblocking IO */
431 set_nonblock(fdin);
432 set_nonblock(fdout);
Damien Miller7d6656c2000-05-20 15:22:36 +1000433 /* we don't have stderr for interactive terminal sessions, see below */
434 if (fderr != -1)
435 set_nonblock(fderr);
Damien Millerdcb6ecd2000-05-17 22:34:22 +1000436
Damien Miller225736c2001-02-19 21:51:08 +1100437 if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin))
438 fdin_is_tty = 1;
439
Damien Miller95def091999-11-25 00:26:21 +1100440 connection_in = packet_get_connection_in();
441 connection_out = packet_get_connection_out();
442
443 previous_stdout_buffer_bytes = 0;
444
445 /* Set approximate I/O buffer size. */
446 if (packet_is_interactive())
447 buffer_high = 4096;
448 else
449 buffer_high = 64 * 1024;
450
451 /* Initialize max_fd to the maximum of the known file descriptors. */
Damien Miller5e953212001-01-30 09:14:00 +1100452 max_fd = MAX(fdin, fdout);
453 if (fderr != -1)
454 max_fd = MAX(max_fd, fderr);
455 max_fd = MAX(max_fd, connection_in);
456 max_fd = MAX(max_fd, connection_out);
Damien Miller95def091999-11-25 00:26:21 +1100457
458 /* Initialize Initialize buffers. */
459 buffer_init(&stdin_buffer);
460 buffer_init(&stdout_buffer);
461 buffer_init(&stderr_buffer);
462
Damien Miller5428f641999-11-25 11:54:57 +1100463 /*
464 * If we have no separate fderr (which is the case when we have a pty
465 * - there we cannot make difference between data sent to stdout and
466 * stderr), indicate that we have seen an EOF from stderr. This way
467 * we don\'t need to check the descriptor everywhere.
468 */
Damien Miller95def091999-11-25 00:26:21 +1100469 if (fderr == -1)
470 fderr_eof = 1;
471
Damien Millerb38eff82000-04-01 11:09:21 +1000472 server_init_dispatch();
473
Damien Miller95def091999-11-25 00:26:21 +1100474 /* Main loop of the server for the interactive session mode. */
475 for (;;) {
Damien Miller95def091999-11-25 00:26:21 +1100476
477 /* Process buffered packets from the client. */
478 process_buffered_input_packets();
479
Damien Miller5428f641999-11-25 11:54:57 +1100480 /*
481 * If we have received eof, and there is no more pending
482 * input data, cause a real eof by closing fdin.
483 */
Damien Miller95def091999-11-25 00:26:21 +1100484 if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) {
485#ifdef USE_PIPES
486 close(fdin);
487#else
Damien Millerb38eff82000-04-01 11:09:21 +1000488 if (fdin != fdout)
Damien Miller95def091999-11-25 00:26:21 +1100489 close(fdin);
490 else
491 shutdown(fdin, SHUT_WR); /* We will no longer send. */
492#endif
493 fdin = -1;
494 }
Damien Miller5428f641999-11-25 11:54:57 +1100495 /* Make packets from buffered stderr data to send to the client. */
Damien Miller95def091999-11-25 00:26:21 +1100496 make_packets_from_stderr_data();
497
Damien Miller5428f641999-11-25 11:54:57 +1100498 /*
499 * Make packets from buffered stdout data to send to the
500 * client. If there is very little to send, this arranges to
501 * not send them now, but to wait a short while to see if we
502 * are getting more data. This is necessary, as some systems
503 * wake up readers from a pty after each separate character.
504 */
Damien Miller95def091999-11-25 00:26:21 +1100505 max_time_milliseconds = 0;
506 stdout_buffer_bytes = buffer_len(&stdout_buffer);
507 if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 &&
508 stdout_buffer_bytes != previous_stdout_buffer_bytes) {
509 /* try again after a while */
510 max_time_milliseconds = 10;
511 } else {
512 /* Send it now. */
513 make_packets_from_stdout_data();
514 }
515 previous_stdout_buffer_bytes = buffer_len(&stdout_buffer);
516
517 /* Send channel data to the client. */
518 if (packet_not_very_much_data_to_write())
519 channel_output_poll();
520
Damien Miller5428f641999-11-25 11:54:57 +1100521 /*
522 * Bail out of the loop if the program has closed its output
523 * descriptors, and we have no more data to send to the
524 * client, and there is no pending buffered data.
525 */
Damien Miller43dc8da2000-11-29 15:55:17 +1100526 if (fdout_eof && fderr_eof && !packet_have_data_to_write() &&
527 buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) {
Damien Miller95def091999-11-25 00:26:21 +1100528 if (!channel_still_open())
Damien Millerb38eff82000-04-01 11:09:21 +1000529 break;
Damien Miller95def091999-11-25 00:26:21 +1100530 if (!waiting_termination) {
531 const char *s = "Waiting for forwarded connections to terminate...\r\n";
532 char *cp;
533 waiting_termination = 1;
534 buffer_append(&stderr_buffer, s, strlen(s));
535
536 /* Display list of open channels. */
537 cp = channel_open_message();
538 buffer_append(&stderr_buffer, cp, strlen(cp));
539 xfree(cp);
540 }
541 }
542 /* Sleep in select() until we can do something. */
Damien Miller5e953212001-01-30 09:14:00 +1100543 wait_until_can_do_something(&readset, &writeset, &max_fd,
544 max_time_milliseconds);
Damien Miller95def091999-11-25 00:26:21 +1100545
546 /* Process any channel events. */
Damien Miller5e953212001-01-30 09:14:00 +1100547 channel_after_select(readset, writeset);
Damien Miller95def091999-11-25 00:26:21 +1100548
549 /* Process input from the client and from program stdout/stderr. */
Damien Miller5e953212001-01-30 09:14:00 +1100550 process_input(readset);
Damien Miller95def091999-11-25 00:26:21 +1100551
552 /* Process output to the client and to program stdin. */
Damien Miller5e953212001-01-30 09:14:00 +1100553 process_output(writeset);
Damien Miller95def091999-11-25 00:26:21 +1100554 }
Damien Miller5e953212001-01-30 09:14:00 +1100555 if (readset)
556 xfree(readset);
557 if (writeset)
558 xfree(writeset);
Damien Miller95def091999-11-25 00:26:21 +1100559
Damien Miller95def091999-11-25 00:26:21 +1100560 /* Cleanup and termination code. */
561
562 /* Wait until all output has been sent to the client. */
563 drain_output();
564
565 debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.",
566 stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes);
567
568 /* Free and clear the buffers. */
569 buffer_free(&stdin_buffer);
570 buffer_free(&stdout_buffer);
571 buffer_free(&stderr_buffer);
572
573 /* Close the file descriptors. */
574 if (fdout != -1)
575 close(fdout);
576 fdout = -1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000577 fdout_eof = 1;
Damien Miller95def091999-11-25 00:26:21 +1100578 if (fderr != -1)
579 close(fderr);
580 fderr = -1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000581 fderr_eof = 1;
Damien Miller95def091999-11-25 00:26:21 +1100582 if (fdin != -1)
583 close(fdin);
584 fdin = -1;
585
586 /* Stop listening for channels; this removes unix domain sockets. */
587 channel_stop_listening();
588
589 /* Wait for the child to exit. Get its exit status. */
590 wait_pid = wait(&wait_status);
Ben Lindstrom46c16222000-12-22 01:43:59 +0000591 if (wait_pid == -1) {
Damien Miller95def091999-11-25 00:26:21 +1100592 /*
593 * It is possible that the wait was handled by SIGCHLD
594 * handler. This may result in either: this call
595 * returning with EINTR, or: this call returning ECHILD.
596 */
597 if (child_terminated)
598 wait_status = child_wait_status;
599 else
600 packet_disconnect("wait: %.100s", strerror(errno));
601 } else {
602 /* Check if it matches the process we forked. */
603 if (wait_pid != pid)
604 error("Strange, wait returned pid %d, expected %d",
Damien Milleraae6c611999-12-06 11:47:28 +1100605 wait_pid, pid);
Damien Miller95def091999-11-25 00:26:21 +1100606 }
607
608 /* We no longer want our SIGCHLD handler to be called. */
609 signal(SIGCHLD, SIG_DFL);
610
611 /* Check if it exited normally. */
612 if (WIFEXITED(wait_status)) {
613 /* Yes, normal exit. Get exit status and send it to the client. */
614 debug("Command exited with status %d.", WEXITSTATUS(wait_status));
615 packet_start(SSH_SMSG_EXITSTATUS);
616 packet_put_int(WEXITSTATUS(wait_status));
617 packet_send();
618 packet_write_wait();
619
Damien Miller5428f641999-11-25 11:54:57 +1100620 /*
621 * Wait for exit confirmation. Note that there might be
622 * other packets coming before it; however, the program has
623 * already died so we just ignore them. The client is
624 * supposed to respond with the confirmation when it receives
625 * the exit status.
626 */
Damien Miller95def091999-11-25 00:26:21 +1100627 do {
628 int plen;
629 type = packet_read(&plen);
630 }
631 while (type != SSH_CMSG_EXIT_CONFIRMATION);
632
633 debug("Received exit confirmation.");
634 return;
635 }
636 /* Check if the program terminated due to a signal. */
637 if (WIFSIGNALED(wait_status))
638 packet_disconnect("Command terminated on signal %d.",
639 WTERMSIG(wait_status));
640
641 /* Some weird exit cause. Just exit. */
642 packet_disconnect("wait returned status %04x.", wait_status);
643 /* NOTREACHED */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000644}
Damien Millerb38eff82000-04-01 11:09:21 +1000645
Damien Miller4af51302000-04-16 11:18:38 +1000646void
Damien Millerefb4afe2000-04-12 18:45:05 +1000647server_loop2(void)
648{
Damien Miller5e953212001-01-30 09:14:00 +1100649 fd_set *readset = NULL, *writeset = NULL;
650 int max_fd;
Damien Millerefb4afe2000-04-12 18:45:05 +1000651 int had_channel = 0;
652 int status;
653 pid_t pid;
654
655 debug("Entering interactive session for SSH2.");
656
Kevin Stevesb6e773a2001-02-04 13:20:36 +0000657 mysignal(SIGCHLD, sigchld_handler2);
Damien Millercf3888d2000-09-30 14:17:52 +1100658 signal(SIGPIPE, SIG_IGN);
Damien Millerefb4afe2000-04-12 18:45:05 +1000659 child_terminated = 0;
660 connection_in = packet_get_connection_in();
661 connection_out = packet_get_connection_out();
Damien Miller5e953212001-01-30 09:14:00 +1100662
663 max_fd = MAX(connection_in, connection_out);
664
Damien Millerefb4afe2000-04-12 18:45:05 +1000665 server_init_dispatch();
666
667 for (;;) {
668 process_buffered_input_packets();
669 if (!had_channel && channel_still_open())
670 had_channel = 1;
671 if (had_channel && !channel_still_open()) {
672 debug("!channel_still_open.");
673 break;
674 }
675 if (packet_not_very_much_data_to_write())
676 channel_output_poll();
Damien Miller5e953212001-01-30 09:14:00 +1100677 wait_until_can_do_something(&readset, &writeset, &max_fd, 0);
Damien Miller43dc8da2000-11-29 15:55:17 +1100678 if (child_terminated) {
Damien Millerefb4afe2000-04-12 18:45:05 +1000679 while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
680 session_close_by_pid(pid, status);
681 child_terminated = 0;
682 }
Damien Miller5e953212001-01-30 09:14:00 +1100683 channel_after_select(readset, writeset);
684 process_input(readset);
685 process_output(writeset);
Damien Millerefb4afe2000-04-12 18:45:05 +1000686 }
Damien Miller5e953212001-01-30 09:14:00 +1100687 if (readset)
688 xfree(readset);
689 if (writeset)
690 xfree(writeset);
691
Damien Millerefb4afe2000-04-12 18:45:05 +1000692 signal(SIGCHLD, SIG_DFL);
693 while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
694 session_close_by_pid(pid, status);
695 channel_stop_listening();
696}
697
Damien Millerb38eff82000-04-01 11:09:21 +1000698void
Damien Miller62cee002000-09-23 17:15:56 +1100699server_input_stdin_data(int type, int plen, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +1000700{
701 char *data;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000702 u_int data_len;
Damien Millerb38eff82000-04-01 11:09:21 +1000703
704 /* Stdin data from the client. Append it to the buffer. */
705 /* Ignore any data if the client has closed stdin. */
706 if (fdin == -1)
707 return;
708 data = packet_get_string(&data_len);
709 packet_integrity_check(plen, (4 + data_len), type);
710 buffer_append(&stdin_buffer, data, data_len);
711 memset(data, 0, data_len);
712 xfree(data);
713}
714
715void
Damien Miller62cee002000-09-23 17:15:56 +1100716server_input_eof(int type, int plen, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +1000717{
718 /*
719 * Eof from the client. The stdin descriptor to the
720 * program will be closed when all buffered data has
721 * drained.
722 */
723 debug("EOF received for stdin.");
724 packet_integrity_check(plen, 0, type);
725 stdin_eof = 1;
726}
727
728void
Damien Miller62cee002000-09-23 17:15:56 +1100729server_input_window_size(int type, int plen, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +1000730{
731 int row = packet_get_int();
732 int col = packet_get_int();
733 int xpixel = packet_get_int();
734 int ypixel = packet_get_int();
735
736 debug("Window change received.");
737 packet_integrity_check(plen, 4 * 4, type);
738 if (fdin != -1)
739 pty_change_window_size(fdin, row, col, xpixel, ypixel);
740}
741
Damien Miller0bc1bd82000-11-13 22:57:25 +1100742Channel *
743server_request_direct_tcpip(char *ctype)
Damien Millerefb4afe2000-04-12 18:45:05 +1000744{
Damien Miller0bc1bd82000-11-13 22:57:25 +1100745 int sock, newch;
Damien Miller4af51302000-04-16 11:18:38 +1000746 char *target, *originator;
747 int target_port, originator_port;
Damien Millerefb4afe2000-04-12 18:45:05 +1000748
Damien Miller4af51302000-04-16 11:18:38 +1000749 target = packet_get_string(NULL);
750 target_port = packet_get_int();
Damien Millerefb4afe2000-04-12 18:45:05 +1000751 originator = packet_get_string(NULL);
752 originator_port = packet_get_int();
Damien Miller4af51302000-04-16 11:18:38 +1000753 packet_done();
Damien Millerb1715dc2000-05-30 13:44:51 +1000754
Damien Miller0bc1bd82000-11-13 22:57:25 +1100755 debug("server_request_direct_tcpip: originator %s port %d, target %s port %d",
Damien Millerb1715dc2000-05-30 13:44:51 +1000756 originator, originator_port, target, target_port);
Damien Millerf6d9e222000-06-18 14:50:44 +1000757
Damien Millerefb4afe2000-04-12 18:45:05 +1000758 /* XXX check permission */
Damien Miller50a41ed2000-10-16 12:14:42 +1100759 if (no_port_forwarding_flag || !options.allow_tcp_forwarding) {
Damien Millerf6d9e222000-06-18 14:50:44 +1000760 xfree(target);
761 xfree(originator);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100762 return NULL;
Damien Millerf6d9e222000-06-18 14:50:44 +1000763 }
Damien Miller4af51302000-04-16 11:18:38 +1000764 sock = channel_connect_to(target, target_port);
765 xfree(target);
Damien Millerefb4afe2000-04-12 18:45:05 +1000766 xfree(originator);
767 if (sock < 0)
Damien Miller0bc1bd82000-11-13 22:57:25 +1100768 return NULL;
Ben Lindstrom7ad97102000-12-06 01:42:49 +0000769 newch = channel_new(ctype, SSH_CHANNEL_CONNECTING,
Damien Millere4340be2000-09-16 13:29:08 +1100770 sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT,
Damien Miller69b69aa2000-10-28 14:19:58 +1100771 CHAN_TCP_PACKET_DEFAULT, 0, xstrdup("direct-tcpip"), 1);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100772 return (newch >= 0) ? channel_lookup(newch) : NULL;
773}
774
775Channel *
776server_request_session(char *ctype)
777{
778 int newch;
779
780 debug("input_session_request");
781 packet_done();
782 /*
783 * A server session has no fd to read or write until a
784 * CHANNEL_REQUEST for a shell is made, so we set the type to
785 * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all
786 * CHANNEL_REQUEST messages is registered.
787 */
788 newch = channel_new(ctype, SSH_CHANNEL_LARVAL,
789 -1, -1, -1, 0, CHAN_SES_PACKET_DEFAULT,
790 0, xstrdup("server-session"), 1);
791 if (session_open(newch) == 1) {
792 channel_register_callback(newch, SSH2_MSG_CHANNEL_REQUEST,
793 session_input_channel_req, (void *)0);
794 channel_register_cleanup(newch, session_close_by_channel);
795 return channel_lookup(newch);
796 } else {
797 debug("session open failed, free channel %d", newch);
798 channel_free(newch);
799 }
800 return NULL;
Damien Millerefb4afe2000-04-12 18:45:05 +1000801}
802
Damien Miller4af51302000-04-16 11:18:38 +1000803void
Damien Miller62cee002000-09-23 17:15:56 +1100804server_input_channel_open(int type, int plen, void *ctxt)
Damien Millerefb4afe2000-04-12 18:45:05 +1000805{
806 Channel *c = NULL;
807 char *ctype;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000808 u_int len;
Damien Millerefb4afe2000-04-12 18:45:05 +1000809 int rchan;
810 int rmaxpack;
811 int rwindow;
812
813 ctype = packet_get_string(&len);
814 rchan = packet_get_int();
815 rwindow = packet_get_int();
816 rmaxpack = packet_get_int();
817
Damien Miller62cee002000-09-23 17:15:56 +1100818 debug("server_input_channel_open: ctype %s rchan %d win %d max %d",
Damien Millerefb4afe2000-04-12 18:45:05 +1000819 ctype, rchan, rwindow, rmaxpack);
820
821 if (strcmp(ctype, "session") == 0) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100822 c = server_request_session(ctype);
Damien Millerefb4afe2000-04-12 18:45:05 +1000823 } else if (strcmp(ctype, "direct-tcpip") == 0) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100824 c = server_request_direct_tcpip(ctype);
Damien Millerefb4afe2000-04-12 18:45:05 +1000825 }
826 if (c != NULL) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100827 debug("server_input_channel_open: confirm %s", ctype);
Damien Millerefb4afe2000-04-12 18:45:05 +1000828 c->remote_id = rchan;
829 c->remote_window = rwindow;
830 c->remote_maxpacket = rmaxpack;
831
832 packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
833 packet_put_int(c->remote_id);
834 packet_put_int(c->self);
835 packet_put_int(c->local_window);
836 packet_put_int(c->local_maxpacket);
837 packet_send();
838 } else {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100839 debug("server_input_channel_open: failure %s", ctype);
Damien Millerefb4afe2000-04-12 18:45:05 +1000840 packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
841 packet_put_int(rchan);
842 packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
843 packet_put_cstring("bla bla");
844 packet_put_cstring("");
845 packet_send();
846 }
847 xfree(ctype);
848}
849
Kevin Stevesef4eea92001-02-05 12:42:17 +0000850void
Damien Miller0bc1bd82000-11-13 22:57:25 +1100851server_input_global_request(int type, int plen, void *ctxt)
852{
853 char *rtype;
854 int want_reply;
855 int success = 0;
856
857 rtype = packet_get_string(NULL);
858 want_reply = packet_get_char();
859 debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000860
Damien Miller0bc1bd82000-11-13 22:57:25 +1100861 if (strcmp(rtype, "tcpip-forward") == 0) {
862 struct passwd *pw;
863 char *listen_address;
864 u_short listen_port;
865
866 pw = auth_get_user();
867 if (pw == NULL)
868 fatal("server_input_global_request: no user");
869 listen_address = packet_get_string(NULL); /* XXX currently ignored */
870 listen_port = (u_short)packet_get_int();
871 debug("server_input_global_request: tcpip-forward listen %s port %d",
872 listen_address, listen_port);
873
874 /* check permissions */
875 if (!options.allow_tcp_forwarding ||
876 no_port_forwarding_flag ||
877 (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) {
878 success = 0;
879 packet_send_debug("Server has disabled port forwarding.");
880 } else {
881 /* Start listening on the port */
Kevin Steves12057502001-02-05 14:54:34 +0000882 success = channel_request_forwarding(
Damien Miller0bc1bd82000-11-13 22:57:25 +1100883 listen_address, listen_port,
884 /*unspec host_to_connect*/ "<unspec host>",
885 /*unspec port_to_connect*/ 0,
886 options.gateway_ports, /*remote*/ 1);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100887 }
888 xfree(listen_address);
889 }
890 if (want_reply) {
891 packet_start(success ?
892 SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
893 packet_send();
894 packet_write_wait();
895 }
896 xfree(rtype);
897}
898
Damien Miller4af51302000-04-16 11:18:38 +1000899void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000900server_init_dispatch_20(void)
Damien Millerefb4afe2000-04-12 18:45:05 +1000901{
902 debug("server_init_dispatch_20");
903 dispatch_init(&dispatch_protocol_error);
904 dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
905 dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
906 dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
907 dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
908 dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open);
909 dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
910 dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
911 dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request);
912 dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100913 dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request);
Damien Millerefb4afe2000-04-12 18:45:05 +1000914}
Damien Miller4af51302000-04-16 11:18:38 +1000915void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000916server_init_dispatch_13(void)
Damien Millerb38eff82000-04-01 11:09:21 +1000917{
918 debug("server_init_dispatch_13");
919 dispatch_init(NULL);
920 dispatch_set(SSH_CMSG_EOF, &server_input_eof);
921 dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data);
922 dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size);
923 dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
924 dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
925 dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
926 dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
927 dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
928 dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
929}
Damien Miller4af51302000-04-16 11:18:38 +1000930void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000931server_init_dispatch_15(void)
Damien Millerb38eff82000-04-01 11:09:21 +1000932{
933 server_init_dispatch_13();
934 debug("server_init_dispatch_15");
935 dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
936 dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose);
937}
Damien Miller4af51302000-04-16 11:18:38 +1000938void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000939server_init_dispatch(void)
Damien Millerb38eff82000-04-01 11:09:21 +1000940{
Damien Millerefb4afe2000-04-12 18:45:05 +1000941 if (compat20)
942 server_init_dispatch_20();
943 else if (compat13)
Damien Millerb38eff82000-04-01 11:09:21 +1000944 server_init_dispatch_13();
945 else
946 server_init_dispatch_15();
947}