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Commit | Line | Data |
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f6fdbddf | 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" | |
b705bea0 | 11 | RCSID("$OpenBSD: ssh-keyscan.c,v 1.12 2001/02/04 15:32:26 stevesk Exp $"); |
f6fdbddf | 12 | |
b705bea0 | 13 | #if defined(HAVE_SYS_QUEUE_H) && !defined(HAVE_BOGUS_SYS_QUEUE_H) |
f6fdbddf | 14 | #include <sys/queue.h> |
bf5f69f7 | 15 | #else |
bf3db92d | 16 | #include "fake-queue.h" |
bf5f69f7 | 17 | #endif |
f6fdbddf | 18 | #include <errno.h> |
19 | ||
20 | #include <openssl/bn.h> | |
f6fdbddf | 21 | |
22 | #include "xmalloc.h" | |
23 | #include "ssh.h" | |
42f11eb2 | 24 | #include "ssh1.h" |
f6fdbddf | 25 | #include "key.h" |
26 | #include "buffer.h" | |
27 | #include "bufaux.h" | |
42f11eb2 | 28 | #include "log.h" |
f6fdbddf | 29 | |
30 | static int argno = 1; /* Number of argument currently being parsed */ | |
31 | ||
32 | int family = AF_UNSPEC; /* IPv4, IPv6 or both */ | |
33 | ||
f6fdbddf | 34 | #define MAXMAXFD 256 |
35 | ||
36 | /* The number of seconds after which to give up on a TCP connection */ | |
37 | int timeout = 5; | |
38 | ||
39 | int maxfd; | |
40 | #define maxcon (maxfd - 10) | |
41 | ||
1fe6a48f | 42 | #ifdef HAVE___PROGNAME |
43 | extern char *__progname; | |
44 | #else | |
45 | char *__progname; | |
46 | #endif | |
f6fdbddf | 47 | fd_set read_wait; |
48 | int ncon; | |
49 | ||
50 | /* | |
51 | * Keep a connection structure for each file descriptor. The state | |
52 | * associated with file descriptor n is held in fdcon[n]. | |
53 | */ | |
54 | typedef struct Connection { | |
1e3b8b07 | 55 | u_char c_status; /* State of connection on this file desc. */ |
f6fdbddf | 56 | #define CS_UNUSED 0 /* File descriptor unused */ |
57 | #define CS_CON 1 /* Waiting to connect/read greeting */ | |
58 | #define CS_SIZE 2 /* Waiting to read initial packet size */ | |
59 | #define CS_KEYS 3 /* Waiting to read public key packet */ | |
60 | int c_fd; /* Quick lookup: c->c_fd == c - fdcon */ | |
61 | int c_plen; /* Packet length field for ssh packet */ | |
62 | int c_len; /* Total bytes which must be read. */ | |
63 | int c_off; /* Length of data read so far. */ | |
64 | char *c_namebase; /* Address to free for c_name and c_namelist */ | |
65 | char *c_name; /* Hostname of connection for errors */ | |
66 | char *c_namelist; /* Pointer to other possible addresses */ | |
67 | char *c_output_name; /* Hostname of connection for output */ | |
68 | char *c_data; /* Data read from this fd */ | |
69 | struct timeval c_tv; /* Time at which connection gets aborted */ | |
70 | TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ | |
71 | } con; | |
72 | ||
73 | TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ | |
74 | con *fdcon; | |
75 | ||
76 | /* | |
77 | * This is just a wrapper around fgets() to make it usable. | |
78 | */ | |
79 | ||
80 | /* Stress-test. Increase this later. */ | |
81 | #define LINEBUF_SIZE 16 | |
82 | ||
83 | typedef struct { | |
84 | char *buf; | |
1e3b8b07 | 85 | u_int size; |
f6fdbddf | 86 | int lineno; |
87 | const char *filename; | |
88 | FILE *stream; | |
89 | void (*errfun) (const char *,...); | |
90 | } Linebuf; | |
91 | ||
92 | static inline Linebuf * | |
93 | Linebuf_alloc(const char *filename, void (*errfun) (const char *,...)) | |
94 | { | |
95 | Linebuf *lb; | |
96 | ||
97 | if (!(lb = malloc(sizeof(*lb)))) { | |
98 | if (errfun) | |
99 | (*errfun) ("linebuf (%s): malloc failed\n", lb->filename); | |
100 | return (NULL); | |
101 | } | |
102 | if (filename) { | |
103 | lb->filename = filename; | |
104 | if (!(lb->stream = fopen(filename, "r"))) { | |
b5c334cc | 105 | xfree(lb); |
f6fdbddf | 106 | if (errfun) |
107 | (*errfun) ("%s: %s\n", filename, strerror(errno)); | |
108 | return (NULL); | |
109 | } | |
110 | } else { | |
111 | lb->filename = "(stdin)"; | |
112 | lb->stream = stdin; | |
113 | } | |
114 | ||
115 | if (!(lb->buf = malloc(lb->size = LINEBUF_SIZE))) { | |
116 | if (errfun) | |
117 | (*errfun) ("linebuf (%s): malloc failed\n", lb->filename); | |
b5c334cc | 118 | xfree(lb); |
f6fdbddf | 119 | return (NULL); |
120 | } | |
121 | lb->errfun = errfun; | |
122 | lb->lineno = 0; | |
123 | return (lb); | |
124 | } | |
125 | ||
126 | static inline void | |
127 | Linebuf_free(Linebuf * lb) | |
128 | { | |
129 | fclose(lb->stream); | |
b5c334cc | 130 | xfree(lb->buf); |
131 | xfree(lb); | |
f6fdbddf | 132 | } |
133 | ||
134 | static inline void | |
135 | Linebuf_restart(Linebuf * lb) | |
136 | { | |
137 | clearerr(lb->stream); | |
138 | rewind(lb->stream); | |
139 | lb->lineno = 0; | |
140 | } | |
141 | ||
142 | static inline int | |
143 | Linebuf_lineno(Linebuf * lb) | |
144 | { | |
145 | return (lb->lineno); | |
146 | } | |
147 | ||
148 | static inline char * | |
149 | getline(Linebuf * lb) | |
150 | { | |
151 | int n = 0; | |
152 | ||
153 | lb->lineno++; | |
154 | for (;;) { | |
155 | /* Read a line */ | |
156 | if (!fgets(&lb->buf[n], lb->size - n, lb->stream)) { | |
157 | if (ferror(lb->stream) && lb->errfun) | |
158 | (*lb->errfun) ("%s: %s\n", lb->filename, strerror(errno)); | |
159 | return (NULL); | |
160 | } | |
161 | n = strlen(lb->buf); | |
162 | ||
163 | /* Return it or an error if it fits */ | |
164 | if (n > 0 && lb->buf[n - 1] == '\n') { | |
165 | lb->buf[n - 1] = '\0'; | |
166 | return (lb->buf); | |
167 | } | |
168 | if (n != lb->size - 1) { | |
169 | if (lb->errfun) | |
170 | (*lb->errfun) ("%s: skipping incomplete last line\n", lb->filename); | |
171 | return (NULL); | |
172 | } | |
173 | /* Double the buffer if we need more space */ | |
174 | if (!(lb->buf = realloc(lb->buf, (lb->size *= 2)))) { | |
175 | if (lb->errfun) | |
176 | (*lb->errfun) ("linebuf (%s): realloc failed\n", lb->filename); | |
177 | return (NULL); | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
182 | static int | |
183 | fdlim_get(int hard) | |
184 | { | |
f318b98b | 185 | #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) |
f6fdbddf | 186 | struct rlimit rlfd; |
187 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) | |
188 | return (-1); | |
189 | if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY) | |
190 | return 10000; | |
191 | else | |
192 | return hard ? rlfd.rlim_max : rlfd.rlim_cur; | |
b03bd394 | 193 | #elif defined (HAVE_SYSCONF) |
194 | return sysconf (_SC_OPEN_MAX); | |
195 | #else | |
196 | return 10000; | |
197 | #endif | |
f6fdbddf | 198 | } |
199 | ||
200 | static int | |
201 | fdlim_set(int lim) | |
202 | { | |
f318b98b | 203 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
f6fdbddf | 204 | struct rlimit rlfd; |
b03bd394 | 205 | #endif |
f6fdbddf | 206 | if (lim <= 0) |
207 | return (-1); | |
f318b98b | 208 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
f6fdbddf | 209 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
210 | return (-1); | |
211 | rlfd.rlim_cur = lim; | |
212 | if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0) | |
213 | return (-1); | |
b03bd394 | 214 | #elif defined (HAVE_SETDTABLESIZE) |
b705bea0 | 215 | setdtablesize(lim); |
b03bd394 | 216 | #endif |
f6fdbddf | 217 | return (0); |
218 | } | |
219 | ||
220 | /* | |
221 | * This is an strsep function that returns a null field for adjacent | |
222 | * separators. This is the same as the 4.4BSD strsep, but different from the | |
223 | * one in the GNU libc. | |
224 | */ | |
225 | inline char * | |
226 | xstrsep(char **str, const char *delim) | |
227 | { | |
228 | char *s, *e; | |
229 | ||
230 | if (!**str) | |
231 | return (NULL); | |
232 | ||
233 | s = *str; | |
234 | e = s + strcspn(s, delim); | |
235 | ||
236 | if (*e != '\0') | |
237 | *e++ = '\0'; | |
238 | *str = e; | |
239 | ||
240 | return (s); | |
241 | } | |
242 | ||
243 | /* | |
244 | * Get the next non-null token (like GNU strsep). Strsep() will return a | |
245 | * null token for two adjacent separators, so we may have to loop. | |
246 | */ | |
247 | char * | |
248 | strnnsep(char **stringp, char *delim) | |
249 | { | |
250 | char *tok; | |
251 | ||
252 | do { | |
253 | tok = xstrsep(stringp, delim); | |
254 | } while (tok && *tok == '\0'); | |
255 | return (tok); | |
256 | } | |
257 | ||
258 | void | |
259 | keyprint(char *host, char *output_name, char *kd, int len) | |
260 | { | |
261 | static Key *rsa; | |
262 | static Buffer msg; | |
263 | ||
264 | if (rsa == NULL) { | |
265 | buffer_init(&msg); | |
266 | rsa = key_new(KEY_RSA1); | |
267 | } | |
268 | buffer_append(&msg, kd, len); | |
269 | buffer_consume(&msg, 8 - (len & 7)); /* padding */ | |
270 | if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) { | |
271 | error("%s: invalid packet type", host); | |
272 | buffer_clear(&msg); | |
273 | return; | |
274 | } | |
275 | buffer_consume(&msg, 8); /* cookie */ | |
276 | ||
277 | /* server key */ | |
278 | (void) buffer_get_int(&msg); | |
279 | buffer_get_bignum(&msg, rsa->rsa->e); | |
280 | buffer_get_bignum(&msg, rsa->rsa->n); | |
281 | ||
282 | /* host key */ | |
283 | (void) buffer_get_int(&msg); | |
284 | buffer_get_bignum(&msg, rsa->rsa->e); | |
285 | buffer_get_bignum(&msg, rsa->rsa->n); | |
286 | buffer_clear(&msg); | |
287 | ||
288 | fprintf(stdout, "%s ", output_name ? output_name : host); | |
289 | key_write(rsa, stdout); | |
290 | fputs("\n", stdout); | |
291 | } | |
292 | ||
293 | int | |
294 | tcpconnect(char *host) | |
295 | { | |
296 | struct addrinfo hints, *ai, *aitop; | |
297 | char strport[NI_MAXSERV]; | |
298 | int gaierr, s = -1; | |
299 | ||
b5c334cc | 300 | snprintf(strport, sizeof strport, "%d", SSH_DEFAULT_PORT); |
f6fdbddf | 301 | memset(&hints, 0, sizeof(hints)); |
302 | hints.ai_family = family; | |
303 | hints.ai_socktype = SOCK_STREAM; | |
304 | if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) | |
305 | fatal("getaddrinfo %s: %s", host, gai_strerror(gaierr)); | |
306 | for (ai = aitop; ai; ai = ai->ai_next) { | |
307 | s = socket(ai->ai_family, SOCK_STREAM, 0); | |
308 | if (s < 0) { | |
309 | error("socket: %s", strerror(errno)); | |
310 | continue; | |
311 | } | |
eea39c02 | 312 | if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) |
f6fdbddf | 313 | fatal("F_SETFL: %s", strerror(errno)); |
314 | if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 && | |
315 | errno != EINPROGRESS) | |
316 | error("connect (`%s'): %s", host, strerror(errno)); | |
317 | else | |
318 | break; | |
319 | close(s); | |
320 | s = -1; | |
321 | } | |
322 | freeaddrinfo(aitop); | |
323 | return s; | |
324 | } | |
325 | ||
326 | int | |
327 | conalloc(char *iname, char *oname) | |
328 | { | |
329 | int s; | |
330 | char *namebase, *name, *namelist; | |
331 | ||
332 | namebase = namelist = xstrdup(iname); | |
333 | ||
334 | do { | |
335 | name = xstrsep(&namelist, ","); | |
336 | if (!name) { | |
b5c334cc | 337 | xfree(namebase); |
f6fdbddf | 338 | return (-1); |
339 | } | |
340 | } while ((s = tcpconnect(name)) < 0); | |
341 | ||
342 | if (s >= maxfd) | |
227e8e86 | 343 | fatal("conalloc: fdno %d too high", s); |
f6fdbddf | 344 | if (fdcon[s].c_status) |
227e8e86 | 345 | fatal("conalloc: attempt to reuse fdno %d", s); |
f6fdbddf | 346 | |
347 | fdcon[s].c_fd = s; | |
348 | fdcon[s].c_status = CS_CON; | |
349 | fdcon[s].c_namebase = namebase; | |
350 | fdcon[s].c_name = name; | |
351 | fdcon[s].c_namelist = namelist; | |
352 | fdcon[s].c_output_name = xstrdup(oname); | |
353 | fdcon[s].c_data = (char *) &fdcon[s].c_plen; | |
354 | fdcon[s].c_len = 4; | |
355 | fdcon[s].c_off = 0; | |
356 | gettimeofday(&fdcon[s].c_tv, NULL); | |
357 | fdcon[s].c_tv.tv_sec += timeout; | |
358 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); | |
359 | FD_SET(s, &read_wait); | |
360 | ncon++; | |
361 | return (s); | |
362 | } | |
363 | ||
364 | void | |
365 | confree(int s) | |
366 | { | |
367 | close(s); | |
368 | if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) | |
227e8e86 | 369 | fatal("confree: attempt to free bad fdno %d", s); |
b5c334cc | 370 | xfree(fdcon[s].c_namebase); |
371 | xfree(fdcon[s].c_output_name); | |
f6fdbddf | 372 | if (fdcon[s].c_status == CS_KEYS) |
b5c334cc | 373 | xfree(fdcon[s].c_data); |
f6fdbddf | 374 | fdcon[s].c_status = CS_UNUSED; |
375 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); | |
376 | FD_CLR(s, &read_wait); | |
377 | ncon--; | |
378 | } | |
379 | ||
380 | void | |
381 | contouch(int s) | |
382 | { | |
383 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); | |
384 | gettimeofday(&fdcon[s].c_tv, NULL); | |
385 | fdcon[s].c_tv.tv_sec += timeout; | |
386 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); | |
387 | } | |
388 | ||
389 | int | |
390 | conrecycle(int s) | |
391 | { | |
392 | int ret; | |
393 | con *c = &fdcon[s]; | |
394 | char *iname, *oname; | |
395 | ||
396 | iname = xstrdup(c->c_namelist); | |
b5c334cc | 397 | oname = xstrdup(c->c_output_name); |
f6fdbddf | 398 | confree(s); |
399 | ret = conalloc(iname, oname); | |
b5c334cc | 400 | xfree(iname); |
401 | xfree(oname); | |
f6fdbddf | 402 | return (ret); |
403 | } | |
404 | ||
405 | void | |
406 | congreet(int s) | |
407 | { | |
408 | char buf[80]; | |
409 | int n; | |
410 | con *c = &fdcon[s]; | |
411 | ||
412 | n = read(s, buf, sizeof(buf)); | |
413 | if (n < 0) { | |
414 | if (errno != ECONNREFUSED) | |
415 | error("read (%s): %s", c->c_name, strerror(errno)); | |
416 | conrecycle(s); | |
417 | return; | |
418 | } | |
419 | if (buf[n - 1] != '\n') { | |
420 | error("%s: bad greeting", c->c_name); | |
421 | confree(s); | |
422 | return; | |
423 | } | |
424 | buf[n - 1] = '\0'; | |
425 | fprintf(stderr, "# %s %s\n", c->c_name, buf); | |
426 | n = snprintf(buf, sizeof buf, "SSH-1.5-OpenSSH-keyscan\r\n"); | |
427 | if (write(s, buf, n) != n) { | |
428 | error("write (%s): %s", c->c_name, strerror(errno)); | |
429 | confree(s); | |
430 | return; | |
431 | } | |
432 | c->c_status = CS_SIZE; | |
433 | contouch(s); | |
434 | } | |
435 | ||
436 | void | |
437 | conread(int s) | |
438 | { | |
439 | int n; | |
440 | con *c = &fdcon[s]; | |
441 | ||
442 | if (c->c_status == CS_CON) { | |
443 | congreet(s); | |
444 | return; | |
445 | } | |
446 | n = read(s, c->c_data + c->c_off, c->c_len - c->c_off); | |
447 | if (n < 0) { | |
448 | error("read (%s): %s", c->c_name, strerror(errno)); | |
449 | confree(s); | |
450 | return; | |
451 | } | |
452 | c->c_off += n; | |
453 | ||
454 | if (c->c_off == c->c_len) | |
455 | switch (c->c_status) { | |
456 | case CS_SIZE: | |
457 | c->c_plen = htonl(c->c_plen); | |
458 | c->c_len = c->c_plen + 8 - (c->c_plen & 7); | |
459 | c->c_off = 0; | |
460 | c->c_data = xmalloc(c->c_len); | |
461 | c->c_status = CS_KEYS; | |
462 | break; | |
463 | case CS_KEYS: | |
464 | keyprint(c->c_name, c->c_output_name, c->c_data, c->c_plen); | |
465 | confree(s); | |
466 | return; | |
467 | break; | |
468 | default: | |
227e8e86 | 469 | fatal("conread: invalid status %d", c->c_status); |
f6fdbddf | 470 | break; |
471 | } | |
472 | ||
473 | contouch(s); | |
474 | } | |
475 | ||
476 | void | |
477 | conloop(void) | |
478 | { | |
479 | fd_set r, e; | |
480 | struct timeval seltime, now; | |
481 | int i; | |
482 | con *c; | |
483 | ||
484 | gettimeofday(&now, NULL); | |
485 | c = tq.tqh_first; | |
486 | ||
487 | if (c && | |
488 | (c->c_tv.tv_sec > now.tv_sec || | |
489 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) { | |
490 | seltime = c->c_tv; | |
491 | seltime.tv_sec -= now.tv_sec; | |
492 | seltime.tv_usec -= now.tv_usec; | |
493 | if ((int) seltime.tv_usec < 0) { | |
494 | seltime.tv_usec += 1000000; | |
495 | seltime.tv_sec--; | |
496 | } | |
497 | } else | |
498 | seltime.tv_sec = seltime.tv_usec = 0; | |
499 | ||
500 | r = e = read_wait; | |
501 | select(maxfd, &r, NULL, &e, &seltime); | |
502 | for (i = 0; i < maxfd; i++) | |
503 | if (FD_ISSET(i, &e)) { | |
504 | error("%s: exception!", fdcon[i].c_name); | |
505 | confree(i); | |
506 | } else if (FD_ISSET(i, &r)) | |
507 | conread(i); | |
508 | ||
509 | c = tq.tqh_first; | |
510 | while (c && | |
511 | (c->c_tv.tv_sec < now.tv_sec || | |
2b87da3b | 512 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) { |
f6fdbddf | 513 | int s = c->c_fd; |
514 | c = c->c_link.tqe_next; | |
515 | conrecycle(s); | |
516 | } | |
517 | } | |
518 | ||
519 | char * | |
520 | nexthost(int argc, char **argv) | |
521 | { | |
522 | static Linebuf *lb; | |
523 | ||
524 | for (;;) { | |
525 | if (!lb) { | |
526 | if (argno >= argc) | |
527 | return (NULL); | |
528 | if (argv[argno][0] != '-') | |
529 | return (argv[argno++]); | |
530 | if (!strcmp(argv[argno], "--")) { | |
531 | if (++argno >= argc) | |
532 | return (NULL); | |
533 | return (argv[argno++]); | |
534 | } else if (!strncmp(argv[argno], "-f", 2)) { | |
535 | char *fname; | |
536 | if (argv[argno][2]) | |
537 | fname = &argv[argno++][2]; | |
538 | else if (++argno >= argc) { | |
539 | error("missing filename for `-f'"); | |
540 | return (NULL); | |
541 | } else | |
542 | fname = argv[argno++]; | |
543 | if (!strcmp(fname, "-")) | |
544 | fname = NULL; | |
f20255cb | 545 | lb = Linebuf_alloc(fname, error); |
f6fdbddf | 546 | } else |
547 | error("ignoring invalid/misplaced option `%s'", argv[argno++]); | |
548 | } else { | |
549 | char *line; | |
550 | line = getline(lb); | |
551 | if (line) | |
552 | return (line); | |
553 | Linebuf_free(lb); | |
554 | lb = NULL; | |
555 | } | |
556 | } | |
557 | } | |
558 | ||
559 | static void | |
560 | usage(void) | |
561 | { | |
227e8e86 | 562 | fatal("usage: %s [-t timeout] { [--] host | -f file } ...", __progname); |
f6fdbddf | 563 | return; |
564 | } | |
565 | ||
566 | int | |
567 | main(int argc, char **argv) | |
568 | { | |
569 | char *host = NULL; | |
570 | ||
1fe6a48f | 571 | __progname = get_progname(argv[0]); |
f6fdbddf | 572 | TAILQ_INIT(&tq); |
573 | ||
f6fdbddf | 574 | if (argc <= argno) |
575 | usage(); | |
576 | ||
577 | if (argv[1][0] == '-' && argv[1][1] == 't') { | |
578 | argno++; | |
579 | if (argv[1][2]) | |
580 | timeout = atoi(&argv[1][2]); | |
581 | else { | |
582 | if (argno >= argc) | |
583 | usage(); | |
584 | timeout = atoi(argv[argno++]); | |
585 | } | |
586 | if (timeout <= 0) | |
587 | usage(); | |
588 | } | |
589 | if (argc <= argno) | |
590 | usage(); | |
591 | ||
592 | maxfd = fdlim_get(1); | |
593 | if (maxfd < 0) | |
227e8e86 | 594 | fatal("%s: fdlim_get: bad value", __progname); |
f6fdbddf | 595 | if (maxfd > MAXMAXFD) |
596 | maxfd = MAXMAXFD; | |
597 | if (maxcon <= 0) | |
227e8e86 | 598 | fatal("%s: not enough file descriptors", __progname); |
f6fdbddf | 599 | if (maxfd > fdlim_get(0)) |
600 | fdlim_set(maxfd); | |
601 | fdcon = xmalloc(maxfd * sizeof(con)); | |
602 | ||
603 | do { | |
604 | while (ncon < maxcon) { | |
605 | char *name; | |
606 | ||
607 | host = nexthost(argc, argv); | |
608 | if (host == NULL) | |
609 | break; | |
610 | name = strnnsep(&host, " \t\n"); | |
611 | conalloc(name, *host ? host : name); | |
612 | } | |
613 | conloop(); | |
614 | } while (host); | |
615 | while (ncon > 0) | |
616 | conloop(); | |
617 | ||
618 | return (0); | |
619 | } |