xref: /dragonfly/crypto/openssh/serverloop.c (revision 6e278935)
1 /* $OpenBSD: serverloop.c,v 1.160 2011/05/15 08:09:01 djm Exp $ */
2 /*
3  * Author: Tatu Ylonen <ylo@cs.hut.fi>
4  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5  *                    All rights reserved
6  * Server main loop for handling the interactive session.
7  *
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  * SSH2 support by Markus Friedl.
15  * Copyright (c) 2000, 2001 Markus Friedl.  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.
36  */
37 
38 #include "includes.h"
39 
40 #include <sys/types.h>
41 #include <sys/param.h>
42 #include <sys/wait.h>
43 #include <sys/socket.h>
44 #ifdef HAVE_SYS_TIME_H
45 # include <sys/time.h>
46 #endif
47 
48 #include <netinet/in.h>
49 
50 #include <errno.h>
51 #include <fcntl.h>
52 #include <pwd.h>
53 #include <signal.h>
54 #include <string.h>
55 #include <termios.h>
56 #include <unistd.h>
57 #include <stdarg.h>
58 
59 #include "openbsd-compat/sys-queue.h"
60 #include "xmalloc.h"
61 #include "packet.h"
62 #include "buffer.h"
63 #include "log.h"
64 #include "servconf.h"
65 #include "canohost.h"
66 #include "sshpty.h"
67 #include "channels.h"
68 #include "compat.h"
69 #include "ssh1.h"
70 #include "ssh2.h"
71 #include "key.h"
72 #include "cipher.h"
73 #include "kex.h"
74 #include "hostfile.h"
75 #include "auth.h"
76 #include "session.h"
77 #include "dispatch.h"
78 #include "auth-options.h"
79 #include "serverloop.h"
80 #include "misc.h"
81 #include "roaming.h"
82 
83 extern ServerOptions options;
84 
85 /* XXX */
86 extern Kex *xxx_kex;
87 extern Authctxt *the_authctxt;
88 extern int use_privsep;
89 
90 static Buffer stdin_buffer;	/* Buffer for stdin data. */
91 static Buffer stdout_buffer;	/* Buffer for stdout data. */
92 static Buffer stderr_buffer;	/* Buffer for stderr data. */
93 static int fdin;		/* Descriptor for stdin (for writing) */
94 static int fdout;		/* Descriptor for stdout (for reading);
95 				   May be same number as fdin. */
96 static int fderr;		/* Descriptor for stderr.  May be -1. */
97 static u_long stdin_bytes = 0;	/* Number of bytes written to stdin. */
98 static u_long stdout_bytes = 0;	/* Number of stdout bytes sent to client. */
99 static u_long stderr_bytes = 0;	/* Number of stderr bytes sent to client. */
100 static u_long fdout_bytes = 0;	/* Number of stdout bytes read from program. */
101 static int stdin_eof = 0;	/* EOF message received from client. */
102 static int fdout_eof = 0;	/* EOF encountered reading from fdout. */
103 static int fderr_eof = 0;	/* EOF encountered readung from fderr. */
104 static int fdin_is_tty = 0;	/* fdin points to a tty. */
105 static int connection_in;	/* Connection to client (input). */
106 static int connection_out;	/* Connection to client (output). */
107 static int connection_closed = 0;	/* Connection to client closed. */
108 static u_int buffer_high;	/* "Soft" max buffer size. */
109 static int no_more_sessions = 0; /* Disallow further sessions. */
110 
111 /*
112  * This SIGCHLD kludge is used to detect when the child exits.  The server
113  * will exit after that, as soon as forwarded connections have terminated.
114  */
115 
116 static volatile sig_atomic_t child_terminated = 0;	/* The child has terminated. */
117 
118 /* Cleanup on signals (!use_privsep case only) */
119 static volatile sig_atomic_t received_sigterm = 0;
120 
121 /* prototypes */
122 static void server_init_dispatch(void);
123 
124 /*
125  * Returns current time in seconds from Jan 1, 1970 with the maximum
126  * available resolution.
127  */
128 
129 static double
130 get_current_time(void)
131 {
132 	struct timeval tv;
133 	gettimeofday(&tv, NULL);
134 	return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
135 }
136 
137 
138 /*
139  * we write to this pipe if a SIGCHLD is caught in order to avoid
140  * the race between select() and child_terminated
141  */
142 static int notify_pipe[2];
143 static void
144 notify_setup(void)
145 {
146 	if (pipe(notify_pipe) < 0) {
147 		error("pipe(notify_pipe) failed %s", strerror(errno));
148 	} else if ((fcntl(notify_pipe[0], F_SETFD, FD_CLOEXEC) == -1) ||
149 	    (fcntl(notify_pipe[1], F_SETFD, FD_CLOEXEC) == -1)) {
150 		error("fcntl(notify_pipe, F_SETFD) failed %s", strerror(errno));
151 		close(notify_pipe[0]);
152 		close(notify_pipe[1]);
153 	} else {
154 		set_nonblock(notify_pipe[0]);
155 		set_nonblock(notify_pipe[1]);
156 		return;
157 	}
158 	notify_pipe[0] = -1;	/* read end */
159 	notify_pipe[1] = -1;	/* write end */
160 }
161 static void
162 notify_parent(void)
163 {
164 	if (notify_pipe[1] != -1)
165 		write(notify_pipe[1], "", 1);
166 }
167 static void
168 notify_prepare(fd_set *readset)
169 {
170 	if (notify_pipe[0] != -1)
171 		FD_SET(notify_pipe[0], readset);
172 }
173 static void
174 notify_done(fd_set *readset)
175 {
176 	char c;
177 
178 	if (notify_pipe[0] != -1 && FD_ISSET(notify_pipe[0], readset))
179 		while (read(notify_pipe[0], &c, 1) != -1)
180 			debug2("notify_done: reading");
181 }
182 
183 /*ARGSUSED*/
184 static void
185 sigchld_handler(int sig)
186 {
187 	int save_errno = errno;
188 	child_terminated = 1;
189 #ifndef _UNICOS
190 	mysignal(SIGCHLD, sigchld_handler);
191 #endif
192 	notify_parent();
193 	errno = save_errno;
194 }
195 
196 /*ARGSUSED*/
197 static void
198 sigterm_handler(int sig)
199 {
200 	received_sigterm = sig;
201 }
202 
203 /*
204  * Make packets from buffered stderr data, and buffer it for sending
205  * to the client.
206  */
207 static void
208 make_packets_from_stderr_data(void)
209 {
210 	u_int len;
211 
212 	/* Send buffered stderr data to the client. */
213 	while (buffer_len(&stderr_buffer) > 0 &&
214 	    packet_not_very_much_data_to_write()) {
215 		len = buffer_len(&stderr_buffer);
216 		if (packet_is_interactive()) {
217 			if (len > 512)
218 				len = 512;
219 		} else {
220 			/* Keep the packets at reasonable size. */
221 			if (len > packet_get_maxsize())
222 				len = packet_get_maxsize();
223 		}
224 		packet_start(SSH_SMSG_STDERR_DATA);
225 		packet_put_string(buffer_ptr(&stderr_buffer), len);
226 		packet_send();
227 		buffer_consume(&stderr_buffer, len);
228 		stderr_bytes += len;
229 	}
230 }
231 
232 /*
233  * Make packets from buffered stdout data, and buffer it for sending to the
234  * client.
235  */
236 static void
237 make_packets_from_stdout_data(void)
238 {
239 	u_int len;
240 
241 	/* Send buffered stdout data to the client. */
242 	while (buffer_len(&stdout_buffer) > 0 &&
243 	    packet_not_very_much_data_to_write()) {
244 		len = buffer_len(&stdout_buffer);
245 		if (packet_is_interactive()) {
246 			if (len > 512)
247 				len = 512;
248 		} else {
249 			/* Keep the packets at reasonable size. */
250 			if (len > packet_get_maxsize())
251 				len = packet_get_maxsize();
252 		}
253 		packet_start(SSH_SMSG_STDOUT_DATA);
254 		packet_put_string(buffer_ptr(&stdout_buffer), len);
255 		packet_send();
256 		buffer_consume(&stdout_buffer, len);
257 		stdout_bytes += len;
258 	}
259 }
260 
261 static void
262 client_alive_check(void)
263 {
264 	int channel_id;
265 
266 	/* timeout, check to see how many we have had */
267 	if (packet_inc_alive_timeouts() > options.client_alive_count_max) {
268 		logit("Timeout, client not responding.");
269 		cleanup_exit(255);
270 	}
271 
272 	/*
273 	 * send a bogus global/channel request with "wantreply",
274 	 * we should get back a failure
275 	 */
276 	if ((channel_id = channel_find_open()) == -1) {
277 		packet_start(SSH2_MSG_GLOBAL_REQUEST);
278 		packet_put_cstring("keepalive@openssh.com");
279 		packet_put_char(1);	/* boolean: want reply */
280 	} else {
281 		channel_request_start(channel_id, "keepalive@openssh.com", 1);
282 	}
283 	packet_send();
284 }
285 
286 /*
287  * Sleep in select() until we can do something.  This will initialize the
288  * select masks.  Upon return, the masks will indicate which descriptors
289  * have data or can accept data.  Optionally, a maximum time can be specified
290  * for the duration of the wait (0 = infinite).
291  */
292 static void
293 wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp,
294     u_int *nallocp, u_int max_time_milliseconds)
295 {
296 	struct timeval tv, *tvp;
297 	int ret;
298 	int client_alive_scheduled = 0;
299 	int program_alive_scheduled = 0;
300 
301 	/*
302 	 * if using client_alive, set the max timeout accordingly,
303 	 * and indicate that this particular timeout was for client
304 	 * alive by setting the client_alive_scheduled flag.
305 	 *
306 	 * this could be randomized somewhat to make traffic
307 	 * analysis more difficult, but we're not doing it yet.
308 	 */
309 	if (compat20 &&
310 	    max_time_milliseconds == 0 && options.client_alive_interval) {
311 		client_alive_scheduled = 1;
312 		max_time_milliseconds = options.client_alive_interval * 1000;
313 	}
314 
315 	/* Allocate and update select() masks for channel descriptors. */
316 	channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, 0);
317 
318 	if (compat20) {
319 #if 0
320 		/* wrong: bad condition XXX */
321 		if (channel_not_very_much_buffered_data())
322 #endif
323 		FD_SET(connection_in, *readsetp);
324 	} else {
325 		/*
326 		 * Read packets from the client unless we have too much
327 		 * buffered stdin or channel data.
328 		 */
329 		if (buffer_len(&stdin_buffer) < buffer_high &&
330 		    channel_not_very_much_buffered_data())
331 			FD_SET(connection_in, *readsetp);
332 		/*
333 		 * If there is not too much data already buffered going to
334 		 * the client, try to get some more data from the program.
335 		 */
336 		if (packet_not_very_much_data_to_write()) {
337 			program_alive_scheduled = child_terminated;
338 			if (!fdout_eof)
339 				FD_SET(fdout, *readsetp);
340 			if (!fderr_eof)
341 				FD_SET(fderr, *readsetp);
342 		}
343 		/*
344 		 * If we have buffered data, try to write some of that data
345 		 * to the program.
346 		 */
347 		if (fdin != -1 && buffer_len(&stdin_buffer) > 0)
348 			FD_SET(fdin, *writesetp);
349 	}
350 	notify_prepare(*readsetp);
351 
352 	/*
353 	 * If we have buffered packet data going to the client, mark that
354 	 * descriptor.
355 	 */
356 	if (packet_have_data_to_write())
357 		FD_SET(connection_out, *writesetp);
358 
359 	/*
360 	 * If child has terminated and there is enough buffer space to read
361 	 * from it, then read as much as is available and exit.
362 	 */
363 	if (child_terminated && packet_not_very_much_data_to_write())
364 		if (max_time_milliseconds == 0 || client_alive_scheduled)
365 			max_time_milliseconds = 100;
366 
367 	if (max_time_milliseconds == 0)
368 		tvp = NULL;
369 	else {
370 		tv.tv_sec = max_time_milliseconds / 1000;
371 		tv.tv_usec = 1000 * (max_time_milliseconds % 1000);
372 		tvp = &tv;
373 	}
374 
375 	/* Wait for something to happen, or the timeout to expire. */
376 	ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp);
377 
378 	if (ret == -1) {
379 		memset(*readsetp, 0, *nallocp);
380 		memset(*writesetp, 0, *nallocp);
381 		if (errno != EINTR)
382 			error("select: %.100s", strerror(errno));
383 	} else {
384 		if (ret == 0 && client_alive_scheduled)
385 			client_alive_check();
386 		if (!compat20 && program_alive_scheduled && fdin_is_tty) {
387 			if (!fdout_eof)
388 				FD_SET(fdout, *readsetp);
389 			if (!fderr_eof)
390 				FD_SET(fderr, *readsetp);
391 		}
392 	}
393 
394 	notify_done(*readsetp);
395 }
396 
397 /*
398  * Processes input from the client and the program.  Input data is stored
399  * in buffers and processed later.
400  */
401 static void
402 process_input(fd_set *readset)
403 {
404 	int len;
405 	char buf[16384];
406 
407 	/* Read and buffer any input data from the client. */
408 	if (FD_ISSET(connection_in, readset)) {
409 		int cont = 0;
410 		len = roaming_read(connection_in, buf, sizeof(buf), &cont);
411 		if (len == 0) {
412 			if (cont)
413 				return;
414 			verbose("Connection closed by %.100s",
415 			    get_remote_ipaddr());
416 			connection_closed = 1;
417 			if (compat20)
418 				return;
419 			cleanup_exit(255);
420 		} else if (len < 0) {
421 			if (errno != EINTR && errno != EAGAIN &&
422 			    errno != EWOULDBLOCK) {
423 				verbose("Read error from remote host "
424 				    "%.100s: %.100s",
425 				    get_remote_ipaddr(), strerror(errno));
426 				cleanup_exit(255);
427 			}
428 		} else {
429 			/* Buffer any received data. */
430 			packet_process_incoming(buf, len);
431 			fdout_bytes += len;
432 		}
433 	}
434 	if (compat20)
435 		return;
436 
437 	/* Read and buffer any available stdout data from the program. */
438 	if (!fdout_eof && FD_ISSET(fdout, readset)) {
439 		errno = 0;
440 		len = read(fdout, buf, sizeof(buf));
441 		if (len < 0 && (errno == EINTR || ((errno == EAGAIN ||
442 		    errno == EWOULDBLOCK) && !child_terminated))) {
443 			/* do nothing */
444 #ifndef PTY_ZEROREAD
445 		} else if (len <= 0) {
446 #else
447 		} else if ((!isatty(fdout) && len <= 0) ||
448 		    (isatty(fdout) && (len < 0 || (len == 0 && errno != 0)))) {
449 #endif
450 			fdout_eof = 1;
451 		} else {
452 			buffer_append(&stdout_buffer, buf, len);
453 			fdout_bytes += len;
454 			debug ("FD out now: %ld", fdout_bytes);
455 		}
456 	}
457 	/* Read and buffer any available stderr data from the program. */
458 	if (!fderr_eof && FD_ISSET(fderr, readset)) {
459 		errno = 0;
460 		len = read(fderr, buf, sizeof(buf));
461 		if (len < 0 && (errno == EINTR || ((errno == EAGAIN ||
462 		    errno == EWOULDBLOCK) && !child_terminated))) {
463 			/* do nothing */
464 #ifndef PTY_ZEROREAD
465 		} else if (len <= 0) {
466 #else
467 		} else if ((!isatty(fderr) && len <= 0) ||
468 		    (isatty(fderr) && (len < 0 || (len == 0 && errno != 0)))) {
469 #endif
470 			fderr_eof = 1;
471 		} else {
472 			buffer_append(&stderr_buffer, buf, len);
473 		}
474 	}
475 }
476 
477 /*
478  * Sends data from internal buffers to client program stdin.
479  */
480 static void
481 process_output(fd_set *writeset)
482 {
483 	struct termios tio;
484 	u_char *data;
485 	u_int dlen;
486 	int len;
487 
488 	/* Write buffered data to program stdin. */
489 	if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) {
490 		data = buffer_ptr(&stdin_buffer);
491 		dlen = buffer_len(&stdin_buffer);
492 		len = write(fdin, data, dlen);
493 		if (len < 0 &&
494 		    (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK)) {
495 			/* do nothing */
496 		} else if (len <= 0) {
497 			if (fdin != fdout)
498 				close(fdin);
499 			else
500 				shutdown(fdin, SHUT_WR); /* We will no longer send. */
501 			fdin = -1;
502 		} else {
503 			/* Successful write. */
504 			if (fdin_is_tty && dlen >= 1 && data[0] != '\r' &&
505 			    tcgetattr(fdin, &tio) == 0 &&
506 			    !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) {
507 				/*
508 				 * Simulate echo to reduce the impact of
509 				 * traffic analysis
510 				 */
511 				packet_send_ignore(len);
512 				packet_send();
513 			}
514 			/* Consume the data from the buffer. */
515 			buffer_consume(&stdin_buffer, len);
516 			/* Update the count of bytes written to the program. */
517 			stdin_bytes += len;
518 		}
519 	}
520 	/* Send any buffered packet data to the client. */
521 	if (FD_ISSET(connection_out, writeset))
522 		stdin_bytes += packet_write_poll();
523 }
524 
525 /*
526  * Wait until all buffered output has been sent to the client.
527  * This is used when the program terminates.
528  */
529 static void
530 drain_output(void)
531 {
532 	/* Send any buffered stdout data to the client. */
533 	if (buffer_len(&stdout_buffer) > 0) {
534 		packet_start(SSH_SMSG_STDOUT_DATA);
535 		packet_put_string(buffer_ptr(&stdout_buffer),
536 				  buffer_len(&stdout_buffer));
537 		packet_send();
538 		/* Update the count of sent bytes. */
539 		stdout_bytes += buffer_len(&stdout_buffer);
540 	}
541 	/* Send any buffered stderr data to the client. */
542 	if (buffer_len(&stderr_buffer) > 0) {
543 		packet_start(SSH_SMSG_STDERR_DATA);
544 		packet_put_string(buffer_ptr(&stderr_buffer),
545 				  buffer_len(&stderr_buffer));
546 		packet_send();
547 		/* Update the count of sent bytes. */
548 		stderr_bytes += buffer_len(&stderr_buffer);
549 	}
550 	/* Wait until all buffered data has been written to the client. */
551 	packet_write_wait();
552 }
553 
554 static void
555 process_buffered_input_packets(void)
556 {
557 	dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL);
558 }
559 
560 /*
561  * Performs the interactive session.  This handles data transmission between
562  * the client and the program.  Note that the notion of stdin, stdout, and
563  * stderr in this function is sort of reversed: this function writes to
564  * stdin (of the child program), and reads from stdout and stderr (of the
565  * child program).
566  */
567 void
568 server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg)
569 {
570 	fd_set *readset = NULL, *writeset = NULL;
571 	int max_fd = 0;
572 	u_int nalloc = 0;
573 	int wait_status;	/* Status returned by wait(). */
574 	pid_t wait_pid;		/* pid returned by wait(). */
575 	int waiting_termination = 0;	/* Have displayed waiting close message. */
576 	u_int max_time_milliseconds;
577 	u_int previous_stdout_buffer_bytes;
578 	u_int stdout_buffer_bytes;
579 	int type;
580 
581 	debug("Entering interactive session.");
582 
583 	/* Initialize the SIGCHLD kludge. */
584 	child_terminated = 0;
585 	mysignal(SIGCHLD, sigchld_handler);
586 
587 	if (!use_privsep) {
588 		signal(SIGTERM, sigterm_handler);
589 		signal(SIGINT, sigterm_handler);
590 		signal(SIGQUIT, sigterm_handler);
591 	}
592 
593 	/* Initialize our global variables. */
594 	fdin = fdin_arg;
595 	fdout = fdout_arg;
596 	fderr = fderr_arg;
597 
598 	/* nonblocking IO */
599 	set_nonblock(fdin);
600 	set_nonblock(fdout);
601 	/* we don't have stderr for interactive terminal sessions, see below */
602 	if (fderr != -1)
603 		set_nonblock(fderr);
604 
605 	if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin))
606 		fdin_is_tty = 1;
607 
608 	connection_in = packet_get_connection_in();
609 	connection_out = packet_get_connection_out();
610 
611 	notify_setup();
612 
613 	previous_stdout_buffer_bytes = 0;
614 
615 	/* Set approximate I/O buffer size. */
616 	if (packet_is_interactive())
617 		buffer_high = 4096;
618 	else
619 		buffer_high = 64 * 1024;
620 
621 #if 0
622 	/* Initialize max_fd to the maximum of the known file descriptors. */
623 	max_fd = MAX(connection_in, connection_out);
624 	max_fd = MAX(max_fd, fdin);
625 	max_fd = MAX(max_fd, fdout);
626 	if (fderr != -1)
627 		max_fd = MAX(max_fd, fderr);
628 #endif
629 
630 	/* Initialize Initialize buffers. */
631 	buffer_init(&stdin_buffer);
632 	buffer_init(&stdout_buffer);
633 	buffer_init(&stderr_buffer);
634 
635 	/*
636 	 * If we have no separate fderr (which is the case when we have a pty
637 	 * - there we cannot make difference between data sent to stdout and
638 	 * stderr), indicate that we have seen an EOF from stderr.  This way
639 	 * we don't need to check the descriptor everywhere.
640 	 */
641 	if (fderr == -1)
642 		fderr_eof = 1;
643 
644 	server_init_dispatch();
645 
646 	/* Main loop of the server for the interactive session mode. */
647 	for (;;) {
648 
649 		/* Process buffered packets from the client. */
650 		process_buffered_input_packets();
651 
652 		/*
653 		 * If we have received eof, and there is no more pending
654 		 * input data, cause a real eof by closing fdin.
655 		 */
656 		if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) {
657 			if (fdin != fdout)
658 				close(fdin);
659 			else
660 				shutdown(fdin, SHUT_WR); /* We will no longer send. */
661 			fdin = -1;
662 		}
663 		/* Make packets from buffered stderr data to send to the client. */
664 		make_packets_from_stderr_data();
665 
666 		/*
667 		 * Make packets from buffered stdout data to send to the
668 		 * client. If there is very little to send, this arranges to
669 		 * not send them now, but to wait a short while to see if we
670 		 * are getting more data. This is necessary, as some systems
671 		 * wake up readers from a pty after each separate character.
672 		 */
673 		max_time_milliseconds = 0;
674 		stdout_buffer_bytes = buffer_len(&stdout_buffer);
675 		if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 &&
676 		    stdout_buffer_bytes != previous_stdout_buffer_bytes) {
677 			/* try again after a while */
678 			max_time_milliseconds = 10;
679 		} else {
680 			/* Send it now. */
681 			make_packets_from_stdout_data();
682 		}
683 		previous_stdout_buffer_bytes = buffer_len(&stdout_buffer);
684 
685 		/* Send channel data to the client. */
686 		if (packet_not_very_much_data_to_write())
687 			channel_output_poll();
688 
689 		/*
690 		 * Bail out of the loop if the program has closed its output
691 		 * descriptors, and we have no more data to send to the
692 		 * client, and there is no pending buffered data.
693 		 */
694 		if (fdout_eof && fderr_eof && !packet_have_data_to_write() &&
695 		    buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) {
696 			if (!channel_still_open())
697 				break;
698 			if (!waiting_termination) {
699 				const char *s = "Waiting for forwarded connections to terminate...\r\n";
700 				char *cp;
701 				waiting_termination = 1;
702 				buffer_append(&stderr_buffer, s, strlen(s));
703 
704 				/* Display list of open channels. */
705 				cp = channel_open_message();
706 				buffer_append(&stderr_buffer, cp, strlen(cp));
707 				xfree(cp);
708 			}
709 		}
710 		max_fd = MAX(connection_in, connection_out);
711 		max_fd = MAX(max_fd, fdin);
712 		max_fd = MAX(max_fd, fdout);
713 		max_fd = MAX(max_fd, fderr);
714 		max_fd = MAX(max_fd, notify_pipe[0]);
715 
716 		/* Sleep in select() until we can do something. */
717 		wait_until_can_do_something(&readset, &writeset, &max_fd,
718 		    &nalloc, max_time_milliseconds);
719 
720 		if (received_sigterm) {
721 			logit("Exiting on signal %d", received_sigterm);
722 			/* Clean up sessions, utmp, etc. */
723 			cleanup_exit(255);
724 		}
725 
726 		/* Process any channel events. */
727 		channel_after_select(readset, writeset);
728 
729 		/* Process input from the client and from program stdout/stderr. */
730 		process_input(readset);
731 
732 		/* Process output to the client and to program stdin. */
733 		process_output(writeset);
734 	}
735 	if (readset)
736 		xfree(readset);
737 	if (writeset)
738 		xfree(writeset);
739 
740 	/* Cleanup and termination code. */
741 
742 	/* Wait until all output has been sent to the client. */
743 	drain_output();
744 
745 	debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.",
746 	    stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes);
747 
748 	/* Free and clear the buffers. */
749 	buffer_free(&stdin_buffer);
750 	buffer_free(&stdout_buffer);
751 	buffer_free(&stderr_buffer);
752 
753 	/* Close the file descriptors. */
754 	if (fdout != -1)
755 		close(fdout);
756 	fdout = -1;
757 	fdout_eof = 1;
758 	if (fderr != -1)
759 		close(fderr);
760 	fderr = -1;
761 	fderr_eof = 1;
762 	if (fdin != -1)
763 		close(fdin);
764 	fdin = -1;
765 
766 	channel_free_all();
767 
768 	/* We no longer want our SIGCHLD handler to be called. */
769 	mysignal(SIGCHLD, SIG_DFL);
770 
771 	while ((wait_pid = waitpid(-1, &wait_status, 0)) < 0)
772 		if (errno != EINTR)
773 			packet_disconnect("wait: %.100s", strerror(errno));
774 	if (wait_pid != pid)
775 		error("Strange, wait returned pid %ld, expected %ld",
776 		    (long)wait_pid, (long)pid);
777 
778 	/* Check if it exited normally. */
779 	if (WIFEXITED(wait_status)) {
780 		/* Yes, normal exit.  Get exit status and send it to the client. */
781 		debug("Command exited with status %d.", WEXITSTATUS(wait_status));
782 		packet_start(SSH_SMSG_EXITSTATUS);
783 		packet_put_int(WEXITSTATUS(wait_status));
784 		packet_send();
785 		packet_write_wait();
786 
787 		/*
788 		 * Wait for exit confirmation.  Note that there might be
789 		 * other packets coming before it; however, the program has
790 		 * already died so we just ignore them.  The client is
791 		 * supposed to respond with the confirmation when it receives
792 		 * the exit status.
793 		 */
794 		do {
795 			type = packet_read();
796 		}
797 		while (type != SSH_CMSG_EXIT_CONFIRMATION);
798 
799 		debug("Received exit confirmation.");
800 		return;
801 	}
802 	/* Check if the program terminated due to a signal. */
803 	if (WIFSIGNALED(wait_status))
804 		packet_disconnect("Command terminated on signal %d.",
805 				  WTERMSIG(wait_status));
806 
807 	/* Some weird exit cause.  Just exit. */
808 	packet_disconnect("wait returned status %04x.", wait_status);
809 	/* NOTREACHED */
810 }
811 
812 static void
813 collect_children(void)
814 {
815 	pid_t pid;
816 	sigset_t oset, nset;
817 	int status;
818 
819 	/* block SIGCHLD while we check for dead children */
820 	sigemptyset(&nset);
821 	sigaddset(&nset, SIGCHLD);
822 	sigprocmask(SIG_BLOCK, &nset, &oset);
823 	if (child_terminated) {
824 		debug("Received SIGCHLD.");
825 		while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
826 		    (pid < 0 && errno == EINTR))
827 			if (pid > 0)
828 				session_close_by_pid(pid, status);
829 		child_terminated = 0;
830 	}
831 	sigprocmask(SIG_SETMASK, &oset, NULL);
832 }
833 
834 void
835 server_loop2(Authctxt *authctxt)
836 {
837 	fd_set *readset = NULL, *writeset = NULL;
838 	int rekeying = 0, max_fd, nalloc = 0;
839 	double start_time, total_time;
840 
841 	debug("Entering interactive session for SSH2.");
842 	start_time = get_current_time();
843 
844 	mysignal(SIGCHLD, sigchld_handler);
845 	child_terminated = 0;
846 	connection_in = packet_get_connection_in();
847 	connection_out = packet_get_connection_out();
848 
849 	if (!use_privsep) {
850 		signal(SIGTERM, sigterm_handler);
851 		signal(SIGINT, sigterm_handler);
852 		signal(SIGQUIT, sigterm_handler);
853 	}
854 
855 	notify_setup();
856 
857 	max_fd = MAX(connection_in, connection_out);
858 	max_fd = MAX(max_fd, notify_pipe[0]);
859 
860 	server_init_dispatch();
861 
862 	for (;;) {
863 		process_buffered_input_packets();
864 
865 		rekeying = (xxx_kex != NULL && !xxx_kex->done);
866 
867 		if (!rekeying && packet_not_very_much_data_to_write())
868 			channel_output_poll();
869 		wait_until_can_do_something(&readset, &writeset, &max_fd,
870 		    &nalloc, 0);
871 
872 		if (received_sigterm) {
873 			logit("Exiting on signal %d", received_sigterm);
874 			/* Clean up sessions, utmp, etc. */
875 			cleanup_exit(255);
876 		}
877 
878 		collect_children();
879 		if (!rekeying) {
880 			channel_after_select(readset, writeset);
881 			if (packet_need_rekeying()) {
882 				debug("need rekeying");
883 				xxx_kex->done = 0;
884 				kex_send_kexinit(xxx_kex);
885 			}
886 		}
887 		process_input(readset);
888 		if (connection_closed)
889 			break;
890 		process_output(writeset);
891 	}
892 	collect_children();
893 
894 	if (readset)
895 		xfree(readset);
896 	if (writeset)
897 		xfree(writeset);
898 
899 	/* free all channels, no more reads and writes */
900 	channel_free_all();
901 
902 	/* free remaining sessions, e.g. remove wtmp entries */
903 	session_destroy_all(NULL);
904 	total_time = get_current_time() - start_time;
905 	logit("SSH: Server;LType: Throughput;Remote: %s-%d;IN: %lu;OUT: %lu;Duration: %.1f;tPut_in: %.1f;tPut_out: %.1f",
906 	      get_remote_ipaddr(), get_remote_port(),
907 	      stdin_bytes, fdout_bytes, total_time, stdin_bytes / total_time,
908 	      fdout_bytes / total_time);
909 }
910 
911 static void
912 server_input_keep_alive(int type, u_int32_t seq, void *ctxt)
913 {
914 	debug("Got %d/%u for keepalive", type, seq);
915 	/*
916 	 * reset timeout, since we got a sane answer from the client.
917 	 * even if this was generated by something other than
918 	 * the bogus CHANNEL_REQUEST we send for keepalives.
919 	 */
920 	packet_set_alive_timeouts(0);
921 }
922 
923 static void
924 server_input_stdin_data(int type, u_int32_t seq, void *ctxt)
925 {
926 	char *data;
927 	u_int data_len;
928 
929 	/* Stdin data from the client.  Append it to the buffer. */
930 	/* Ignore any data if the client has closed stdin. */
931 	if (fdin == -1)
932 		return;
933 	data = packet_get_string(&data_len);
934 	packet_check_eom();
935 	buffer_append(&stdin_buffer, data, data_len);
936 	memset(data, 0, data_len);
937 	xfree(data);
938 }
939 
940 static void
941 server_input_eof(int type, u_int32_t seq, void *ctxt)
942 {
943 	/*
944 	 * Eof from the client.  The stdin descriptor to the
945 	 * program will be closed when all buffered data has
946 	 * drained.
947 	 */
948 	debug("EOF received for stdin.");
949 	packet_check_eom();
950 	stdin_eof = 1;
951 }
952 
953 static void
954 server_input_window_size(int type, u_int32_t seq, void *ctxt)
955 {
956 	u_int row = packet_get_int();
957 	u_int col = packet_get_int();
958 	u_int xpixel = packet_get_int();
959 	u_int ypixel = packet_get_int();
960 
961 	debug("Window change received.");
962 	packet_check_eom();
963 	if (fdin != -1)
964 		pty_change_window_size(fdin, row, col, xpixel, ypixel);
965 }
966 
967 static Channel *
968 server_request_direct_tcpip(void)
969 {
970 	Channel *c;
971 	char *target, *originator;
972 	u_short target_port, originator_port;
973 
974 	target = packet_get_string(NULL);
975 	target_port = packet_get_int();
976 	originator = packet_get_string(NULL);
977 	originator_port = packet_get_int();
978 	packet_check_eom();
979 
980 	debug("server_request_direct_tcpip: originator %s port %d, target %s "
981 	    "port %d", originator, originator_port, target, target_port);
982 
983 	/* XXX check permission */
984 	c = channel_connect_to(target, target_port,
985 	    "direct-tcpip", "direct-tcpip");
986 
987 	xfree(originator);
988 	xfree(target);
989 
990 	return c;
991 }
992 
993 static Channel *
994 server_request_tun(void)
995 {
996 	Channel *c = NULL;
997 	int mode, tun;
998 	int sock;
999 
1000 	mode = packet_get_int();
1001 	switch (mode) {
1002 	case SSH_TUNMODE_POINTOPOINT:
1003 	case SSH_TUNMODE_ETHERNET:
1004 		break;
1005 	default:
1006 		packet_send_debug("Unsupported tunnel device mode.");
1007 		return NULL;
1008 	}
1009 	if ((options.permit_tun & mode) == 0) {
1010 		packet_send_debug("Server has rejected tunnel device "
1011 		    "forwarding");
1012 		return NULL;
1013 	}
1014 
1015 	tun = packet_get_int();
1016 	if (forced_tun_device != -1) {
1017 		if (tun != SSH_TUNID_ANY && forced_tun_device != tun)
1018 			goto done;
1019 		tun = forced_tun_device;
1020 	}
1021 	sock = tun_open(tun, mode);
1022 	if (sock < 0)
1023 		goto done;
1024 	if (options.hpn_disabled)
1025 	c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
1026 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
1027 	else
1028 		c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
1029 		    options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
1030 	c->datagram = 1;
1031 #if defined(SSH_TUN_FILTER)
1032 	if (mode == SSH_TUNMODE_POINTOPOINT)
1033 		channel_register_filter(c->self, sys_tun_infilter,
1034 		    sys_tun_outfilter, NULL, NULL);
1035 #endif
1036 
1037  done:
1038 	if (c == NULL)
1039 		packet_send_debug("Failed to open the tunnel device.");
1040 	return c;
1041 }
1042 
1043 static Channel *
1044 server_request_session(void)
1045 {
1046 	Channel *c;
1047 
1048 	debug("input_session_request");
1049 	packet_check_eom();
1050 
1051 	if (no_more_sessions) {
1052 		packet_disconnect("Possible attack: attempt to open a session "
1053 		    "after additional sessions disabled");
1054 	}
1055 
1056 	/*
1057 	 * A server session has no fd to read or write until a
1058 	 * CHANNEL_REQUEST for a shell is made, so we set the type to
1059 	 * SSH_CHANNEL_LARVAL.  Additionally, a callback for handling all
1060 	 * CHANNEL_REQUEST messages is registered.
1061 	 */
1062 	c = channel_new("session", SSH_CHANNEL_LARVAL,
1063 	    -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT,
1064 	    0, "server-session", 1);
1065 	if ((options.tcp_rcv_buf_poll) && (!options.hpn_disabled))
1066 		c->dynamic_window = 1;
1067 	if (session_open(the_authctxt, c->self) != 1) {
1068 		debug("session open failed, free channel %d", c->self);
1069 		channel_free(c);
1070 		return NULL;
1071 	}
1072 	channel_register_cleanup(c->self, session_close_by_channel, 0);
1073 	return c;
1074 }
1075 
1076 static void
1077 server_input_channel_open(int type, u_int32_t seq, void *ctxt)
1078 {
1079 	Channel *c = NULL;
1080 	char *ctype;
1081 	int rchan;
1082 	u_int rmaxpack, rwindow, len;
1083 
1084 	ctype = packet_get_string(&len);
1085 	rchan = packet_get_int();
1086 	rwindow = packet_get_int();
1087 	rmaxpack = packet_get_int();
1088 
1089 	debug("server_input_channel_open: ctype %s rchan %d win %d max %d",
1090 	    ctype, rchan, rwindow, rmaxpack);
1091 
1092 	if (strcmp(ctype, "session") == 0) {
1093 		c = server_request_session();
1094 	} else if (strcmp(ctype, "direct-tcpip") == 0) {
1095 		c = server_request_direct_tcpip();
1096 	} else if (strcmp(ctype, "tun@openssh.com") == 0) {
1097 		c = server_request_tun();
1098 	}
1099 	if (c != NULL) {
1100 		debug("server_input_channel_open: confirm %s", ctype);
1101 		c->remote_id = rchan;
1102 		c->remote_window = rwindow;
1103 		c->remote_maxpacket = rmaxpack;
1104 		if (c->type != SSH_CHANNEL_CONNECTING) {
1105 			packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1106 			packet_put_int(c->remote_id);
1107 			packet_put_int(c->self);
1108 			packet_put_int(c->local_window);
1109 			packet_put_int(c->local_maxpacket);
1110 			packet_send();
1111 		}
1112 	} else {
1113 		debug("server_input_channel_open: failure %s", ctype);
1114 		packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1115 		packet_put_int(rchan);
1116 		packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1117 		if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1118 			packet_put_cstring("open failed");
1119 			packet_put_cstring("");
1120 		}
1121 		packet_send();
1122 	}
1123 	xfree(ctype);
1124 }
1125 
1126 static void
1127 server_input_global_request(int type, u_int32_t seq, void *ctxt)
1128 {
1129 	char *rtype;
1130 	int want_reply;
1131 	int success = 0, allocated_listen_port = 0;
1132 
1133 	rtype = packet_get_string(NULL);
1134 	want_reply = packet_get_char();
1135 	debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply);
1136 
1137 	/* -R style forwarding */
1138 	if (strcmp(rtype, "tcpip-forward") == 0) {
1139 		struct passwd *pw;
1140 		char *listen_address;
1141 		u_short listen_port;
1142 
1143 		pw = the_authctxt->pw;
1144 		if (pw == NULL || !the_authctxt->valid)
1145 			fatal("server_input_global_request: no/invalid user");
1146 		listen_address = packet_get_string(NULL);
1147 		listen_port = (u_short)packet_get_int();
1148 		debug("server_input_global_request: tcpip-forward listen %s port %d",
1149 		    listen_address, listen_port);
1150 
1151 		/* check permissions */
1152 		if (!options.allow_tcp_forwarding ||
1153 		    no_port_forwarding_flag ||
1154 		    (!want_reply && listen_port == 0)
1155 #ifndef NO_IPPORT_RESERVED_CONCEPT
1156 		    || (listen_port != 0 && listen_port < IPPORT_RESERVED &&
1157                     pw->pw_uid != 0)
1158 #endif
1159 		    ) {
1160 			success = 0;
1161 			packet_send_debug("Server has disabled port forwarding.");
1162 		} else {
1163 			/* Start listening on the port */
1164 			success = channel_setup_remote_fwd_listener(
1165 			    listen_address, listen_port,
1166 			    &allocated_listen_port, options.gateway_ports);
1167 		}
1168 		xfree(listen_address);
1169 	} else if (strcmp(rtype, "cancel-tcpip-forward") == 0) {
1170 		char *cancel_address;
1171 		u_short cancel_port;
1172 
1173 		cancel_address = packet_get_string(NULL);
1174 		cancel_port = (u_short)packet_get_int();
1175 		debug("%s: cancel-tcpip-forward addr %s port %d", __func__,
1176 		    cancel_address, cancel_port);
1177 
1178 		success = channel_cancel_rport_listener(cancel_address,
1179 		    cancel_port);
1180 		xfree(cancel_address);
1181 	} else if (strcmp(rtype, "no-more-sessions@openssh.com") == 0) {
1182 		no_more_sessions = 1;
1183 		success = 1;
1184 	}
1185 	if (want_reply) {
1186 		packet_start(success ?
1187 		    SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1188 		if (success && allocated_listen_port > 0)
1189 			packet_put_int(allocated_listen_port);
1190 		packet_send();
1191 		packet_write_wait();
1192 	}
1193 	xfree(rtype);
1194 }
1195 
1196 static void
1197 server_input_channel_req(int type, u_int32_t seq, void *ctxt)
1198 {
1199 	Channel *c;
1200 	int id, reply, success = 0;
1201 	char *rtype;
1202 
1203 	id = packet_get_int();
1204 	rtype = packet_get_string(NULL);
1205 	reply = packet_get_char();
1206 
1207 	debug("server_input_channel_req: channel %d request %s reply %d",
1208 	    id, rtype, reply);
1209 
1210 	if ((c = channel_lookup(id)) == NULL)
1211 		packet_disconnect("server_input_channel_req: "
1212 		    "unknown channel %d", id);
1213 	if (!strcmp(rtype, "eow@openssh.com")) {
1214 		packet_check_eom();
1215 		chan_rcvd_eow(c);
1216 	} else if ((c->type == SSH_CHANNEL_LARVAL ||
1217 	    c->type == SSH_CHANNEL_OPEN) && strcmp(c->ctype, "session") == 0)
1218 		success = session_input_channel_req(c, rtype);
1219 	if (reply) {
1220 		packet_start(success ?
1221 		    SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1222 		packet_put_int(c->remote_id);
1223 		packet_send();
1224 	}
1225 	xfree(rtype);
1226 }
1227 
1228 static void
1229 server_init_dispatch_20(void)
1230 {
1231 	debug("server_init_dispatch_20");
1232 	dispatch_init(&dispatch_protocol_error);
1233 	dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1234 	dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1235 	dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1236 	dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1237 	dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open);
1238 	dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1239 	dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1240 	dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &server_input_channel_req);
1241 	dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1242 	dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request);
1243 	/* client_alive */
1244 	dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &server_input_keep_alive);
1245 	dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_keep_alive);
1246 	dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &server_input_keep_alive);
1247 	dispatch_set(SSH2_MSG_REQUEST_FAILURE, &server_input_keep_alive);
1248 	/* rekeying */
1249 	dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1250 }
1251 static void
1252 server_init_dispatch_13(void)
1253 {
1254 	debug("server_init_dispatch_13");
1255 	dispatch_init(NULL);
1256 	dispatch_set(SSH_CMSG_EOF, &server_input_eof);
1257 	dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data);
1258 	dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size);
1259 	dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1260 	dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1261 	dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1262 	dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1263 	dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1264 	dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1265 }
1266 static void
1267 server_init_dispatch_15(void)
1268 {
1269 	server_init_dispatch_13();
1270 	debug("server_init_dispatch_15");
1271 	dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1272 	dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose);
1273 }
1274 static void
1275 server_init_dispatch(void)
1276 {
1277 	if (compat20)
1278 		server_init_dispatch_20();
1279 	else if (compat13)
1280 		server_init_dispatch_13();
1281 	else
1282 		server_init_dispatch_15();
1283 }
1284