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1 | /* | |
2 | * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>. | |
3 | * | |
4 | * Modification and redistribution in source and binary forms is | |
5 | * permitted provided that due credit is given to the author and the | |
6 | * OpenBSD project (for instance by leaving this copyright notice | |
7 | * intact). | |
8 | */ | |
9 | ||
10 | #include "includes.h" | |
11 | RCSID("$OpenBSD: ssh-keyscan.c,v 1.22 2001/03/06 06:11:18 deraadt Exp $"); | |
12 | ||
13 | #if defined(HAVE_SYS_QUEUE_H) && !defined(HAVE_BOGUS_SYS_QUEUE_H) | |
14 | #include <sys/queue.h> | |
15 | #else | |
16 | #include "openbsd-compat/fake-queue.h" | |
17 | #endif | |
18 | #include <errno.h> | |
19 | ||
20 | #include <openssl/bn.h> | |
21 | ||
22 | #include "xmalloc.h" | |
23 | #include "ssh.h" | |
24 | #include "ssh1.h" | |
25 | #include "key.h" | |
26 | #include "buffer.h" | |
27 | #include "bufaux.h" | |
28 | #include "log.h" | |
29 | #include "atomicio.h" | |
30 | ||
31 | static int argno = 1; /* Number of argument currently being parsed */ | |
32 | ||
33 | int family = AF_UNSPEC; /* IPv4, IPv6 or both */ | |
34 | ||
35 | #define MAXMAXFD 256 | |
36 | ||
37 | /* The number of seconds after which to give up on a TCP connection */ | |
38 | int timeout = 5; | |
39 | ||
40 | int maxfd; | |
41 | #define MAXCON (maxfd - 10) | |
42 | ||
43 | #ifdef HAVE___PROGNAME | |
44 | extern char *__progname; | |
45 | #else | |
46 | char *__progname; | |
47 | #endif | |
48 | fd_set *read_wait; | |
49 | size_t read_wait_size; | |
50 | int ncon; | |
51 | ||
52 | /* | |
53 | * Keep a connection structure for each file descriptor. The state | |
54 | * associated with file descriptor n is held in fdcon[n]. | |
55 | */ | |
56 | typedef struct Connection { | |
57 | u_char c_status; /* State of connection on this file desc. */ | |
58 | #define CS_UNUSED 0 /* File descriptor unused */ | |
59 | #define CS_CON 1 /* Waiting to connect/read greeting */ | |
60 | #define CS_SIZE 2 /* Waiting to read initial packet size */ | |
61 | #define CS_KEYS 3 /* Waiting to read public key packet */ | |
62 | int c_fd; /* Quick lookup: c->c_fd == c - fdcon */ | |
63 | int c_plen; /* Packet length field for ssh packet */ | |
64 | int c_len; /* Total bytes which must be read. */ | |
65 | int c_off; /* Length of data read so far. */ | |
66 | char *c_namebase; /* Address to free for c_name and c_namelist */ | |
67 | char *c_name; /* Hostname of connection for errors */ | |
68 | char *c_namelist; /* Pointer to other possible addresses */ | |
69 | char *c_output_name; /* Hostname of connection for output */ | |
70 | char *c_data; /* Data read from this fd */ | |
71 | struct timeval c_tv; /* Time at which connection gets aborted */ | |
72 | TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ | |
73 | } con; | |
74 | ||
75 | TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ | |
76 | con *fdcon; | |
77 | ||
78 | /* | |
79 | * This is just a wrapper around fgets() to make it usable. | |
80 | */ | |
81 | ||
82 | /* Stress-test. Increase this later. */ | |
83 | #define LINEBUF_SIZE 16 | |
84 | ||
85 | typedef struct { | |
86 | char *buf; | |
87 | u_int size; | |
88 | int lineno; | |
89 | const char *filename; | |
90 | FILE *stream; | |
91 | void (*errfun) (const char *,...); | |
92 | } Linebuf; | |
93 | ||
94 | Linebuf * | |
95 | Linebuf_alloc(const char *filename, void (*errfun) (const char *,...)) | |
96 | { | |
97 | Linebuf *lb; | |
98 | ||
99 | if (!(lb = malloc(sizeof(*lb)))) { | |
100 | if (errfun) | |
101 | (*errfun) ("linebuf (%s): malloc failed\n", lb->filename); | |
102 | return (NULL); | |
103 | } | |
104 | if (filename) { | |
105 | lb->filename = filename; | |
106 | if (!(lb->stream = fopen(filename, "r"))) { | |
107 | xfree(lb); | |
108 | if (errfun) | |
109 | (*errfun) ("%s: %s\n", filename, strerror(errno)); | |
110 | return (NULL); | |
111 | } | |
112 | } else { | |
113 | lb->filename = "(stdin)"; | |
114 | lb->stream = stdin; | |
115 | } | |
116 | ||
117 | if (!(lb->buf = malloc(lb->size = LINEBUF_SIZE))) { | |
118 | if (errfun) | |
119 | (*errfun) ("linebuf (%s): malloc failed\n", lb->filename); | |
120 | xfree(lb); | |
121 | return (NULL); | |
122 | } | |
123 | lb->errfun = errfun; | |
124 | lb->lineno = 0; | |
125 | return (lb); | |
126 | } | |
127 | ||
128 | void | |
129 | Linebuf_free(Linebuf * lb) | |
130 | { | |
131 | fclose(lb->stream); | |
132 | xfree(lb->buf); | |
133 | xfree(lb); | |
134 | } | |
135 | ||
136 | void | |
137 | Linebuf_restart(Linebuf * lb) | |
138 | { | |
139 | clearerr(lb->stream); | |
140 | rewind(lb->stream); | |
141 | lb->lineno = 0; | |
142 | } | |
143 | ||
144 | int | |
145 | Linebuf_lineno(Linebuf * lb) | |
146 | { | |
147 | return (lb->lineno); | |
148 | } | |
149 | ||
150 | char * | |
151 | Linebuf_getline(Linebuf * lb) | |
152 | { | |
153 | int n = 0; | |
154 | ||
155 | lb->lineno++; | |
156 | for (;;) { | |
157 | /* Read a line */ | |
158 | if (!fgets(&lb->buf[n], lb->size - n, lb->stream)) { | |
159 | if (ferror(lb->stream) && lb->errfun) | |
160 | (*lb->errfun) ("%s: %s\n", lb->filename, | |
161 | strerror(errno)); | |
162 | return (NULL); | |
163 | } | |
164 | n = strlen(lb->buf); | |
165 | ||
166 | /* Return it or an error if it fits */ | |
167 | if (n > 0 && lb->buf[n - 1] == '\n') { | |
168 | lb->buf[n - 1] = '\0'; | |
169 | return (lb->buf); | |
170 | } | |
171 | if (n != lb->size - 1) { | |
172 | if (lb->errfun) | |
173 | (*lb->errfun) ("%s: skipping incomplete last line\n", | |
174 | lb->filename); | |
175 | return (NULL); | |
176 | } | |
177 | /* Double the buffer if we need more space */ | |
178 | if (!(lb->buf = realloc(lb->buf, (lb->size *= 2)))) { | |
179 | if (lb->errfun) | |
180 | (*lb->errfun) ("linebuf (%s): realloc failed\n", | |
181 | lb->filename); | |
182 | return (NULL); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | int | |
188 | fdlim_get(int hard) | |
189 | { | |
190 | #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) | |
191 | struct rlimit rlfd; | |
192 | ||
193 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) | |
194 | return (-1); | |
195 | if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY) | |
196 | return 10000; | |
197 | else | |
198 | return hard ? rlfd.rlim_max : rlfd.rlim_cur; | |
199 | #elif defined (HAVE_SYSCONF) | |
200 | return sysconf (_SC_OPEN_MAX); | |
201 | #else | |
202 | return 10000; | |
203 | #endif | |
204 | } | |
205 | ||
206 | int | |
207 | fdlim_set(int lim) | |
208 | { | |
209 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) | |
210 | struct rlimit rlfd; | |
211 | #endif | |
212 | if (lim <= 0) | |
213 | return (-1); | |
214 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) | |
215 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) | |
216 | return (-1); | |
217 | rlfd.rlim_cur = lim; | |
218 | if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0) | |
219 | return (-1); | |
220 | #elif defined (HAVE_SETDTABLESIZE) | |
221 | setdtablesize(lim); | |
222 | #endif | |
223 | return (0); | |
224 | } | |
225 | ||
226 | /* | |
227 | * This is an strsep function that returns a null field for adjacent | |
228 | * separators. This is the same as the 4.4BSD strsep, but different from the | |
229 | * one in the GNU libc. | |
230 | */ | |
231 | char * | |
232 | xstrsep(char **str, const char *delim) | |
233 | { | |
234 | char *s, *e; | |
235 | ||
236 | if (!**str) | |
237 | return (NULL); | |
238 | ||
239 | s = *str; | |
240 | e = s + strcspn(s, delim); | |
241 | ||
242 | if (*e != '\0') | |
243 | *e++ = '\0'; | |
244 | *str = e; | |
245 | ||
246 | return (s); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Get the next non-null token (like GNU strsep). Strsep() will return a | |
251 | * null token for two adjacent separators, so we may have to loop. | |
252 | */ | |
253 | char * | |
254 | strnnsep(char **stringp, char *delim) | |
255 | { | |
256 | char *tok; | |
257 | ||
258 | do { | |
259 | tok = xstrsep(stringp, delim); | |
260 | } while (tok && *tok == '\0'); | |
261 | return (tok); | |
262 | } | |
263 | ||
264 | void | |
265 | keyprint(char *host, char *output_name, char *kd, int len) | |
266 | { | |
267 | static Key *rsa; | |
268 | static Buffer msg; | |
269 | ||
270 | if (rsa == NULL) { | |
271 | buffer_init(&msg); | |
272 | rsa = key_new(KEY_RSA1); | |
273 | } | |
274 | buffer_append(&msg, kd, len); | |
275 | buffer_consume(&msg, 8 - (len & 7)); /* padding */ | |
276 | if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) { | |
277 | error("%s: invalid packet type", host); | |
278 | buffer_clear(&msg); | |
279 | return; | |
280 | } | |
281 | buffer_consume(&msg, 8); /* cookie */ | |
282 | ||
283 | /* server key */ | |
284 | (void) buffer_get_int(&msg); | |
285 | buffer_get_bignum(&msg, rsa->rsa->e); | |
286 | buffer_get_bignum(&msg, rsa->rsa->n); | |
287 | ||
288 | /* host key */ | |
289 | (void) buffer_get_int(&msg); | |
290 | buffer_get_bignum(&msg, rsa->rsa->e); | |
291 | buffer_get_bignum(&msg, rsa->rsa->n); | |
292 | buffer_clear(&msg); | |
293 | ||
294 | fprintf(stdout, "%s ", output_name ? output_name : host); | |
295 | key_write(rsa, stdout); | |
296 | fputs("\n", stdout); | |
297 | } | |
298 | ||
299 | int | |
300 | tcpconnect(char *host) | |
301 | { | |
302 | struct addrinfo hints, *ai, *aitop; | |
303 | char strport[NI_MAXSERV]; | |
304 | int gaierr, s = -1; | |
305 | ||
306 | snprintf(strport, sizeof strport, "%d", SSH_DEFAULT_PORT); | |
307 | memset(&hints, 0, sizeof(hints)); | |
308 | hints.ai_family = family; | |
309 | hints.ai_socktype = SOCK_STREAM; | |
310 | if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) | |
311 | fatal("getaddrinfo %s: %s", host, gai_strerror(gaierr)); | |
312 | for (ai = aitop; ai; ai = ai->ai_next) { | |
313 | s = socket(ai->ai_family, SOCK_STREAM, 0); | |
314 | if (s < 0) { | |
315 | error("socket: %s", strerror(errno)); | |
316 | continue; | |
317 | } | |
318 | if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) | |
319 | fatal("F_SETFL: %s", strerror(errno)); | |
320 | if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 && | |
321 | errno != EINPROGRESS) | |
322 | error("connect (`%s'): %s", host, strerror(errno)); | |
323 | else | |
324 | break; | |
325 | close(s); | |
326 | s = -1; | |
327 | } | |
328 | freeaddrinfo(aitop); | |
329 | return s; | |
330 | } | |
331 | ||
332 | int | |
333 | conalloc(char *iname, char *oname) | |
334 | { | |
335 | int s; | |
336 | char *namebase, *name, *namelist; | |
337 | ||
338 | namebase = namelist = xstrdup(iname); | |
339 | ||
340 | do { | |
341 | name = xstrsep(&namelist, ","); | |
342 | if (!name) { | |
343 | xfree(namebase); | |
344 | return (-1); | |
345 | } | |
346 | } while ((s = tcpconnect(name)) < 0); | |
347 | ||
348 | if (s >= maxfd) | |
349 | fatal("conalloc: fdno %d too high", s); | |
350 | if (fdcon[s].c_status) | |
351 | fatal("conalloc: attempt to reuse fdno %d", s); | |
352 | ||
353 | fdcon[s].c_fd = s; | |
354 | fdcon[s].c_status = CS_CON; | |
355 | fdcon[s].c_namebase = namebase; | |
356 | fdcon[s].c_name = name; | |
357 | fdcon[s].c_namelist = namelist; | |
358 | fdcon[s].c_output_name = xstrdup(oname); | |
359 | fdcon[s].c_data = (char *) &fdcon[s].c_plen; | |
360 | fdcon[s].c_len = 4; | |
361 | fdcon[s].c_off = 0; | |
362 | gettimeofday(&fdcon[s].c_tv, NULL); | |
363 | fdcon[s].c_tv.tv_sec += timeout; | |
364 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); | |
365 | FD_SET(s, read_wait); | |
366 | ncon++; | |
367 | return (s); | |
368 | } | |
369 | ||
370 | void | |
371 | confree(int s) | |
372 | { | |
373 | if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) | |
374 | fatal("confree: attempt to free bad fdno %d", s); | |
375 | close(s); | |
376 | xfree(fdcon[s].c_namebase); | |
377 | xfree(fdcon[s].c_output_name); | |
378 | if (fdcon[s].c_status == CS_KEYS) | |
379 | xfree(fdcon[s].c_data); | |
380 | fdcon[s].c_status = CS_UNUSED; | |
381 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); | |
382 | FD_CLR(s, read_wait); | |
383 | ncon--; | |
384 | } | |
385 | ||
386 | void | |
387 | contouch(int s) | |
388 | { | |
389 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); | |
390 | gettimeofday(&fdcon[s].c_tv, NULL); | |
391 | fdcon[s].c_tv.tv_sec += timeout; | |
392 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); | |
393 | } | |
394 | ||
395 | int | |
396 | conrecycle(int s) | |
397 | { | |
398 | int ret; | |
399 | con *c = &fdcon[s]; | |
400 | char *iname, *oname; | |
401 | ||
402 | iname = xstrdup(c->c_namelist); | |
403 | oname = xstrdup(c->c_output_name); | |
404 | confree(s); | |
405 | ret = conalloc(iname, oname); | |
406 | xfree(iname); | |
407 | xfree(oname); | |
408 | return (ret); | |
409 | } | |
410 | ||
411 | void | |
412 | congreet(int s) | |
413 | { | |
414 | char buf[80], *cp; | |
415 | size_t bufsiz; | |
416 | int n = 0; | |
417 | con *c = &fdcon[s]; | |
418 | ||
419 | bufsiz = sizeof(buf); | |
420 | cp = buf; | |
421 | while (bufsiz-- && (n = read(s, cp, 1)) == 1 && *cp != '\n' && *cp != '\r') | |
422 | cp++; | |
423 | if (n < 0) { | |
424 | if (errno != ECONNREFUSED) | |
425 | error("read (%s): %s", c->c_name, strerror(errno)); | |
426 | conrecycle(s); | |
427 | return; | |
428 | } | |
429 | if (*cp != '\n' && *cp != '\r') { | |
430 | error("%s: bad greeting", c->c_name); | |
431 | confree(s); | |
432 | return; | |
433 | } | |
434 | *cp = '\0'; | |
435 | fprintf(stderr, "# %s %s\n", c->c_name, buf); | |
436 | n = snprintf(buf, sizeof buf, "SSH-1.5-OpenSSH-keyscan\r\n"); | |
437 | if (atomicio(write, s, buf, n) != n) { | |
438 | error("write (%s): %s", c->c_name, strerror(errno)); | |
439 | confree(s); | |
440 | return; | |
441 | } | |
442 | c->c_status = CS_SIZE; | |
443 | contouch(s); | |
444 | } | |
445 | ||
446 | void | |
447 | conread(int s) | |
448 | { | |
449 | int n; | |
450 | con *c = &fdcon[s]; | |
451 | ||
452 | if (c->c_status == CS_CON) { | |
453 | congreet(s); | |
454 | return; | |
455 | } | |
456 | n = read(s, c->c_data + c->c_off, c->c_len - c->c_off); | |
457 | if (n < 0) { | |
458 | error("read (%s): %s", c->c_name, strerror(errno)); | |
459 | confree(s); | |
460 | return; | |
461 | } | |
462 | c->c_off += n; | |
463 | ||
464 | if (c->c_off == c->c_len) | |
465 | switch (c->c_status) { | |
466 | case CS_SIZE: | |
467 | c->c_plen = htonl(c->c_plen); | |
468 | c->c_len = c->c_plen + 8 - (c->c_plen & 7); | |
469 | c->c_off = 0; | |
470 | c->c_data = xmalloc(c->c_len); | |
471 | c->c_status = CS_KEYS; | |
472 | break; | |
473 | case CS_KEYS: | |
474 | keyprint(c->c_name, c->c_output_name, c->c_data, c->c_plen); | |
475 | confree(s); | |
476 | return; | |
477 | break; | |
478 | default: | |
479 | fatal("conread: invalid status %d", c->c_status); | |
480 | break; | |
481 | } | |
482 | ||
483 | contouch(s); | |
484 | } | |
485 | ||
486 | void | |
487 | conloop(void) | |
488 | { | |
489 | fd_set *r, *e; | |
490 | struct timeval seltime, now; | |
491 | int i; | |
492 | con *c; | |
493 | ||
494 | gettimeofday(&now, NULL); | |
495 | c = tq.tqh_first; | |
496 | ||
497 | if (c && (c->c_tv.tv_sec > now.tv_sec || | |
498 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) { | |
499 | seltime = c->c_tv; | |
500 | seltime.tv_sec -= now.tv_sec; | |
501 | seltime.tv_usec -= now.tv_usec; | |
502 | if (seltime.tv_usec < 0) { | |
503 | seltime.tv_usec += 1000000; | |
504 | seltime.tv_sec--; | |
505 | } | |
506 | } else | |
507 | seltime.tv_sec = seltime.tv_usec = 0; | |
508 | ||
509 | r = xmalloc(read_wait_size); | |
510 | memcpy(r, read_wait, read_wait_size); | |
511 | e = xmalloc(read_wait_size); | |
512 | memcpy(e, read_wait, read_wait_size); | |
513 | ||
514 | while (select(maxfd, r, NULL, e, &seltime) == -1 && | |
515 | (errno == EAGAIN || errno == EINTR)) | |
516 | ; | |
517 | ||
518 | for (i = 0; i < maxfd; i++) { | |
519 | if (FD_ISSET(i, e)) { | |
520 | error("%s: exception!", fdcon[i].c_name); | |
521 | confree(i); | |
522 | } else if (FD_ISSET(i, r)) | |
523 | conread(i); | |
524 | } | |
525 | xfree(r); | |
526 | xfree(e); | |
527 | ||
528 | c = tq.tqh_first; | |
529 | while (c && (c->c_tv.tv_sec < now.tv_sec || | |
530 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) { | |
531 | int s = c->c_fd; | |
532 | ||
533 | c = c->c_link.tqe_next; | |
534 | conrecycle(s); | |
535 | } | |
536 | } | |
537 | ||
538 | char * | |
539 | nexthost(int argc, char **argv) | |
540 | { | |
541 | static Linebuf *lb; | |
542 | ||
543 | for (;;) { | |
544 | if (!lb) { | |
545 | if (argno >= argc) | |
546 | return (NULL); | |
547 | if (argv[argno][0] != '-') | |
548 | return (argv[argno++]); | |
549 | if (!strcmp(argv[argno], "--")) { | |
550 | if (++argno >= argc) | |
551 | return (NULL); | |
552 | return (argv[argno++]); | |
553 | } else if (!strncmp(argv[argno], "-f", 2)) { | |
554 | char *fname; | |
555 | ||
556 | if (argv[argno][2]) | |
557 | fname = &argv[argno++][2]; | |
558 | else if (++argno >= argc) { | |
559 | error("missing filename for `-f'"); | |
560 | return (NULL); | |
561 | } else | |
562 | fname = argv[argno++]; | |
563 | if (!strcmp(fname, "-")) | |
564 | fname = NULL; | |
565 | lb = Linebuf_alloc(fname, error); | |
566 | } else | |
567 | error("ignoring invalid/misplaced option `%s'", | |
568 | argv[argno++]); | |
569 | } else { | |
570 | char *line; | |
571 | ||
572 | line = Linebuf_getline(lb); | |
573 | if (line) | |
574 | return (line); | |
575 | Linebuf_free(lb); | |
576 | lb = NULL; | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | void | |
582 | usage(void) | |
583 | { | |
584 | fatal("usage: %s [-t timeout] { [--] host | -f file } ...", __progname); | |
585 | return; | |
586 | } | |
587 | ||
588 | int | |
589 | main(int argc, char **argv) | |
590 | { | |
591 | char *host = NULL; | |
592 | ||
593 | __progname = get_progname(argv[0]); | |
594 | TAILQ_INIT(&tq); | |
595 | ||
596 | if (argc <= argno) | |
597 | usage(); | |
598 | ||
599 | if (argv[1][0] == '-' && argv[1][1] == 't') { | |
600 | argno++; | |
601 | if (argv[1][2]) | |
602 | timeout = atoi(&argv[1][2]); | |
603 | else { | |
604 | if (argno >= argc) | |
605 | usage(); | |
606 | timeout = atoi(argv[argno++]); | |
607 | } | |
608 | if (timeout <= 0) | |
609 | usage(); | |
610 | } | |
611 | if (argc <= argno) | |
612 | usage(); | |
613 | ||
614 | maxfd = fdlim_get(1); | |
615 | if (maxfd < 0) | |
616 | fatal("%s: fdlim_get: bad value", __progname); | |
617 | if (maxfd > MAXMAXFD) | |
618 | maxfd = MAXMAXFD; | |
619 | if (MAXCON <= 0) | |
620 | fatal("%s: not enough file descriptors", __progname); | |
621 | if (maxfd > fdlim_get(0)) | |
622 | fdlim_set(maxfd); | |
623 | fdcon = xmalloc(maxfd * sizeof(con)); | |
624 | memset(fdcon, 0, maxfd * sizeof(con)); | |
625 | ||
626 | read_wait_size = howmany(maxfd, NFDBITS) * sizeof(fd_mask); | |
627 | read_wait = xmalloc(read_wait_size); | |
628 | memset(read_wait, 0, read_wait_size); | |
629 | ||
630 | do { | |
631 | while (ncon < MAXCON) { | |
632 | char *name; | |
633 | ||
634 | host = nexthost(argc, argv); | |
635 | if (host == NULL) | |
636 | break; | |
637 | name = strnnsep(&host, " \t\n"); | |
638 | conalloc(name, *host ? host : name); | |
639 | } | |
640 | conloop(); | |
641 | } while (host); | |
642 | while (ncon > 0) | |
643 | conloop(); | |
644 | ||
645 | return (0); | |
646 | } |