blob: 304fcfde8670af75ae9077f7205b97f6b4bc6e3e [file] [log] [blame]
Damien Millerbacb7fb2008-05-19 14:56:33 +10001/* $OpenBSD: ssh-keyscan.c,v 1.76 2008/04/30 10:14:03 djm Exp $ */
Ben Lindstromb6434ae2000-12-05 01:15:09 +00002/*
3 * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
4 *
5 * Modification and redistribution in source and binary forms is
6 * permitted provided that due credit is given to the author and the
Ben Lindstroma238f6e2001-06-09 01:30:39 +00007 * OpenBSD project by leaving this copyright notice intact.
Ben Lindstromb6434ae2000-12-05 01:15:09 +00008 */
9
10#include "includes.h"
Damien Millercd4223c2006-03-15 11:22:47 +110011
Damien Miller9b481512002-09-12 10:43:29 +100012#include "openbsd-compat/sys-queue.h"
Damien Millercd4223c2006-03-15 11:22:47 +110013#include <sys/resource.h>
Damien Miller9aec9192006-08-05 10:57:45 +100014#ifdef HAVE_SYS_TIME_H
15# include <sys/time.h>
16#endif
Damien Millere3476ed2006-07-24 14:13:33 +100017
Darren Tucker46aa3e02006-09-02 15:32:40 +100018#include <netinet/in.h>
19#include <arpa/inet.h>
20
Damien Millere3476ed2006-07-24 14:13:33 +100021#include <openssl/bn.h>
22
Damien Millerb8fe89c2006-07-24 14:51:00 +100023#include <netdb.h>
Darren Tuckerdeecec92006-07-12 22:44:34 +100024#include <errno.h>
Damien Millerbe43ebf2006-07-24 13:51:51 +100025#include <setjmp.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100026#include <stdarg.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100027#include <stdio.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100028#include <stdlib.h>
Damien Millerd7834352006-08-05 12:39:39 +100029#include <signal.h>
Damien Millere3476ed2006-07-24 14:13:33 +100030#include <string.h>
Damien Millere6b3b612006-07-24 14:01:23 +100031#include <unistd.h>
Ben Lindstromb6434ae2000-12-05 01:15:09 +000032
Ben Lindstromb6434ae2000-12-05 01:15:09 +000033#include "xmalloc.h"
34#include "ssh.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000035#include "ssh1.h"
Damien Millerd7834352006-08-05 12:39:39 +100036#include "buffer.h"
Ben Lindstromb6434ae2000-12-05 01:15:09 +000037#include "key.h"
Damien Millerd7834352006-08-05 12:39:39 +100038#include "cipher.h"
Ben Lindstrom325e70c2001-08-06 22:41:30 +000039#include "kex.h"
40#include "compat.h"
41#include "myproposal.h"
42#include "packet.h"
43#include "dispatch.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000044#include "log.h"
Ben Lindstromd20b8552001-03-05 07:01:18 +000045#include "atomicio.h"
Ben Lindstrom325e70c2001-08-06 22:41:30 +000046#include "misc.h"
Damien Millerdb7b8172005-03-01 21:48:03 +110047#include "hostfile.h"
Ben Lindstromb6434ae2000-12-05 01:15:09 +000048
Ben Lindstrom325e70c2001-08-06 22:41:30 +000049/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
50 Default value is AF_UNSPEC means both IPv4 and IPv6. */
Ben Lindstrom325e70c2001-08-06 22:41:30 +000051int IPv4or6 = AF_UNSPEC;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000052
Ben Lindstrom325e70c2001-08-06 22:41:30 +000053int ssh_port = SSH_DEFAULT_PORT;
Kevin Steves76e7d9b2001-09-20 20:30:09 +000054
55#define KT_RSA1 1
56#define KT_DSA 2
57#define KT_RSA 4
58
Damien Millerbacb7fb2008-05-19 14:56:33 +100059int get_keytypes = KT_RSA; /* Get only RSA keys by default */
Ben Lindstromb6434ae2000-12-05 01:15:09 +000060
Damien Millerdb7b8172005-03-01 21:48:03 +110061int hash_hosts = 0; /* Hash hostname on output */
62
Ben Lindstromb6434ae2000-12-05 01:15:09 +000063#define MAXMAXFD 256
64
65/* The number of seconds after which to give up on a TCP connection */
66int timeout = 5;
67
68int maxfd;
Ben Lindstromd20b8552001-03-05 07:01:18 +000069#define MAXCON (maxfd - 10)
Ben Lindstromb6434ae2000-12-05 01:15:09 +000070
Kevin Stevesec84dc12000-12-13 17:45:15 +000071extern char *__progname;
Ben Lindstromc1e04212001-03-05 07:04:38 +000072fd_set *read_wait;
Damien Miller07d86be2006-03-26 14:19:21 +110073size_t read_wait_nfdset;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000074int ncon;
Ben Lindstrom325e70c2001-08-06 22:41:30 +000075int nonfatal_fatal = 0;
76jmp_buf kexjmp;
Ben Lindstrom520b55c2001-09-12 18:05:05 +000077Key *kexjmp_key;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000078
79/*
80 * Keep a connection structure for each file descriptor. The state
81 * associated with file descriptor n is held in fdcon[n].
82 */
83typedef struct Connection {
Ben Lindstrom46c16222000-12-22 01:43:59 +000084 u_char c_status; /* State of connection on this file desc. */
Ben Lindstromb6434ae2000-12-05 01:15:09 +000085#define CS_UNUSED 0 /* File descriptor unused */
86#define CS_CON 1 /* Waiting to connect/read greeting */
87#define CS_SIZE 2 /* Waiting to read initial packet size */
88#define CS_KEYS 3 /* Waiting to read public key packet */
89 int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
90 int c_plen; /* Packet length field for ssh packet */
91 int c_len; /* Total bytes which must be read. */
92 int c_off; /* Length of data read so far. */
Ben Lindstrom325e70c2001-08-06 22:41:30 +000093 int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */
Ben Lindstromb6434ae2000-12-05 01:15:09 +000094 char *c_namebase; /* Address to free for c_name and c_namelist */
95 char *c_name; /* Hostname of connection for errors */
96 char *c_namelist; /* Pointer to other possible addresses */
97 char *c_output_name; /* Hostname of connection for output */
98 char *c_data; /* Data read from this fd */
Ben Lindstrom325e70c2001-08-06 22:41:30 +000099 Kex *c_kex; /* The key-exchange struct for ssh2 */
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000100 struct timeval c_tv; /* Time at which connection gets aborted */
101 TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
102} con;
103
104TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
105con *fdcon;
106
107/*
108 * This is just a wrapper around fgets() to make it usable.
109 */
110
111/* Stress-test. Increase this later. */
112#define LINEBUF_SIZE 16
113
114typedef struct {
115 char *buf;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000116 u_int size;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000117 int lineno;
118 const char *filename;
119 FILE *stream;
120 void (*errfun) (const char *,...);
121} Linebuf;
122
Ben Lindstrombba81212001-06-25 05:01:22 +0000123static Linebuf *
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000124Linebuf_alloc(const char *filename, void (*errfun) (const char *,...))
125{
126 Linebuf *lb;
127
128 if (!(lb = malloc(sizeof(*lb)))) {
129 if (errfun)
Ben Lindstrom04f9af72002-07-04 00:03:56 +0000130 (*errfun) ("linebuf (%s): malloc failed\n",
131 filename ? filename : "(stdin)");
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000132 return (NULL);
133 }
134 if (filename) {
135 lb->filename = filename;
136 if (!(lb->stream = fopen(filename, "r"))) {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000137 xfree(lb);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000138 if (errfun)
139 (*errfun) ("%s: %s\n", filename, strerror(errno));
140 return (NULL);
141 }
142 } else {
143 lb->filename = "(stdin)";
144 lb->stream = stdin;
145 }
146
Damien Miller3bbaba62006-03-26 13:59:38 +1100147 if (!(lb->buf = malloc((lb->size = LINEBUF_SIZE)))) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000148 if (errfun)
149 (*errfun) ("linebuf (%s): malloc failed\n", lb->filename);
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000150 xfree(lb);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000151 return (NULL);
152 }
153 lb->errfun = errfun;
154 lb->lineno = 0;
155 return (lb);
156}
157
Ben Lindstrombba81212001-06-25 05:01:22 +0000158static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000159Linebuf_free(Linebuf * lb)
160{
161 fclose(lb->stream);
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000162 xfree(lb->buf);
163 xfree(lb);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000164}
165
Ben Lindstrombba81212001-06-25 05:01:22 +0000166#if 0
167static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000168Linebuf_restart(Linebuf * lb)
169{
170 clearerr(lb->stream);
171 rewind(lb->stream);
172 lb->lineno = 0;
173}
174
Ben Lindstrombba81212001-06-25 05:01:22 +0000175static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000176Linebuf_lineno(Linebuf * lb)
177{
178 return (lb->lineno);
179}
Ben Lindstrombba81212001-06-25 05:01:22 +0000180#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000181
Ben Lindstrombba81212001-06-25 05:01:22 +0000182static char *
Ben Lindstromc791beb2001-02-10 23:18:11 +0000183Linebuf_getline(Linebuf * lb)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000184{
Damien Millereccb9de2005-06-17 12:59:34 +1000185 size_t n = 0;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000186 void *p;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000187
188 lb->lineno++;
189 for (;;) {
190 /* Read a line */
191 if (!fgets(&lb->buf[n], lb->size - n, lb->stream)) {
192 if (ferror(lb->stream) && lb->errfun)
Ben Lindstrom965710f2002-07-07 22:17:22 +0000193 (*lb->errfun)("%s: %s\n", lb->filename,
Ben Lindstromb0a4cd82001-03-05 04:54:49 +0000194 strerror(errno));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000195 return (NULL);
196 }
197 n = strlen(lb->buf);
198
199 /* Return it or an error if it fits */
200 if (n > 0 && lb->buf[n - 1] == '\n') {
201 lb->buf[n - 1] = '\0';
202 return (lb->buf);
203 }
204 if (n != lb->size - 1) {
205 if (lb->errfun)
Ben Lindstrom965710f2002-07-07 22:17:22 +0000206 (*lb->errfun)("%s: skipping incomplete last line\n",
Ben Lindstromb0a4cd82001-03-05 04:54:49 +0000207 lb->filename);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000208 return (NULL);
209 }
210 /* Double the buffer if we need more space */
Ben Lindstrom965710f2002-07-07 22:17:22 +0000211 lb->size *= 2;
212 if ((p = realloc(lb->buf, lb->size)) == NULL) {
213 lb->size /= 2;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000214 if (lb->errfun)
Ben Lindstrom965710f2002-07-07 22:17:22 +0000215 (*lb->errfun)("linebuf (%s): realloc failed\n",
Ben Lindstromb0a4cd82001-03-05 04:54:49 +0000216 lb->filename);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000217 return (NULL);
218 }
Ben Lindstrom965710f2002-07-07 22:17:22 +0000219 lb->buf = p;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000220 }
221}
222
Ben Lindstrombba81212001-06-25 05:01:22 +0000223static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000224fdlim_get(int hard)
225{
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000226#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000227 struct rlimit rlfd;
Ben Lindstromb0a4cd82001-03-05 04:54:49 +0000228
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000229 if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
230 return (-1);
231 if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
Damien Millere00074a2003-11-24 13:07:45 +1100232 return SSH_SYSFDMAX;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000233 else
234 return hard ? rlfd.rlim_max : rlfd.rlim_cur;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000235#else
Damien Millere00074a2003-11-24 13:07:45 +1100236 return SSH_SYSFDMAX;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000237#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000238}
239
Ben Lindstrombba81212001-06-25 05:01:22 +0000240static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000241fdlim_set(int lim)
242{
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000243#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000244 struct rlimit rlfd;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000245#endif
Ben Lindstrom5c98db52002-07-07 22:25:29 +0000246
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000247 if (lim <= 0)
248 return (-1);
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000249#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000250 if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
251 return (-1);
252 rlfd.rlim_cur = lim;
253 if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0)
254 return (-1);
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000255#elif defined (HAVE_SETDTABLESIZE)
Kevin Steves28a7f262001-02-05 15:43:59 +0000256 setdtablesize(lim);
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000257#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000258 return (0);
259}
260
261/*
262 * This is an strsep function that returns a null field for adjacent
263 * separators. This is the same as the 4.4BSD strsep, but different from the
264 * one in the GNU libc.
265 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000266static char *
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000267xstrsep(char **str, const char *delim)
268{
269 char *s, *e;
270
271 if (!**str)
272 return (NULL);
273
274 s = *str;
275 e = s + strcspn(s, delim);
276
277 if (*e != '\0')
278 *e++ = '\0';
279 *str = e;
280
281 return (s);
282}
283
284/*
285 * Get the next non-null token (like GNU strsep). Strsep() will return a
286 * null token for two adjacent separators, so we may have to loop.
287 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000288static char *
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000289strnnsep(char **stringp, char *delim)
290{
291 char *tok;
292
293 do {
294 tok = xstrsep(stringp, delim);
295 } while (tok && *tok == '\0');
296 return (tok);
297}
298
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000299static Key *
300keygrab_ssh1(con *c)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000301{
302 static Key *rsa;
303 static Buffer msg;
304
305 if (rsa == NULL) {
306 buffer_init(&msg);
307 rsa = key_new(KEY_RSA1);
308 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000309 buffer_append(&msg, c->c_data, c->c_plen);
310 buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000311 if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000312 error("%s: invalid packet type", c->c_name);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000313 buffer_clear(&msg);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000314 return NULL;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000315 }
316 buffer_consume(&msg, 8); /* cookie */
317
318 /* server key */
319 (void) buffer_get_int(&msg);
320 buffer_get_bignum(&msg, rsa->rsa->e);
321 buffer_get_bignum(&msg, rsa->rsa->n);
322
323 /* host key */
324 (void) buffer_get_int(&msg);
325 buffer_get_bignum(&msg, rsa->rsa->e);
326 buffer_get_bignum(&msg, rsa->rsa->n);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000327
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000328 buffer_clear(&msg);
329
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000330 return (rsa);
331}
332
333static int
334hostjump(Key *hostkey)
335{
Ben Lindstrom520b55c2001-09-12 18:05:05 +0000336 kexjmp_key = hostkey;
337 longjmp(kexjmp, 1);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000338}
339
340static int
341ssh2_capable(int remote_major, int remote_minor)
342{
343 switch (remote_major) {
344 case 1:
345 if (remote_minor == 99)
346 return 1;
347 break;
348 case 2:
349 return 1;
350 default:
351 break;
352 }
353 return 0;
354}
355
356static Key *
357keygrab_ssh2(con *c)
358{
359 int j;
360
361 packet_set_connection(c->c_fd, c->c_fd);
362 enable_compat20();
363 myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = c->c_keytype == KT_DSA?
364 "ssh-dss": "ssh-rsa";
365 c->c_kex = kex_setup(myproposal);
Damien Miller8e7fb332003-02-24 12:03:03 +1100366 c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
Damien Millerf675fc42004-06-15 10:30:09 +1000367 c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
Damien Miller8e7fb332003-02-24 12:03:03 +1100368 c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
Damien Millera63128d2006-03-15 12:08:28 +1100369 c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000370 c->c_kex->verify_host_key = hostjump;
371
372 if (!(j = setjmp(kexjmp))) {
373 nonfatal_fatal = 1;
374 dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex);
375 fprintf(stderr, "Impossible! dispatch_run() returned!\n");
376 exit(1);
377 }
378 nonfatal_fatal = 0;
379 xfree(c->c_kex);
380 c->c_kex = NULL;
381 packet_close();
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000382
Ben Lindstrom520b55c2001-09-12 18:05:05 +0000383 return j < 0? NULL : kexjmp_key;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000384}
385
386static void
387keyprint(con *c, Key *key)
388{
Damien Millerdb7b8172005-03-01 21:48:03 +1100389 char *host = c->c_output_name ? c->c_output_name : c->c_name;
390
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000391 if (!key)
392 return;
Damien Millerdb7b8172005-03-01 21:48:03 +1100393 if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
394 fatal("host_hash failed");
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000395
Damien Millerdb7b8172005-03-01 21:48:03 +1100396 fprintf(stdout, "%s ", host);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000397 key_write(key, stdout);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000398 fputs("\n", stdout);
399}
400
Ben Lindstrombba81212001-06-25 05:01:22 +0000401static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000402tcpconnect(char *host)
403{
404 struct addrinfo hints, *ai, *aitop;
405 char strport[NI_MAXSERV];
406 int gaierr, s = -1;
407
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000408 snprintf(strport, sizeof strport, "%d", ssh_port);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000409 memset(&hints, 0, sizeof(hints));
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000410 hints.ai_family = IPv4or6;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000411 hints.ai_socktype = SOCK_STREAM;
412 if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
Darren Tucker4abde772007-12-29 02:43:51 +1100413 fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000414 for (ai = aitop; ai; ai = ai->ai_next) {
Damien Miller2372ace2003-05-14 13:42:23 +1000415 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000416 if (s < 0) {
417 error("socket: %s", strerror(errno));
418 continue;
419 }
Damien Miller232711f2004-06-15 10:35:30 +1000420 if (set_nonblock(s) == -1)
421 fatal("%s: set_nonblock(%d)", __func__, s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000422 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
423 errno != EINPROGRESS)
424 error("connect (`%s'): %s", host, strerror(errno));
425 else
426 break;
427 close(s);
428 s = -1;
429 }
430 freeaddrinfo(aitop);
431 return s;
432}
433
Ben Lindstrombba81212001-06-25 05:01:22 +0000434static int
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000435conalloc(char *iname, char *oname, int keytype)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000436{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000437 char *namebase, *name, *namelist;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000438 int s;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000439
440 namebase = namelist = xstrdup(iname);
441
442 do {
443 name = xstrsep(&namelist, ",");
444 if (!name) {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000445 xfree(namebase);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000446 return (-1);
447 }
448 } while ((s = tcpconnect(name)) < 0);
449
450 if (s >= maxfd)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000451 fatal("conalloc: fdno %d too high", s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000452 if (fdcon[s].c_status)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000453 fatal("conalloc: attempt to reuse fdno %d", s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000454
455 fdcon[s].c_fd = s;
456 fdcon[s].c_status = CS_CON;
457 fdcon[s].c_namebase = namebase;
458 fdcon[s].c_name = name;
459 fdcon[s].c_namelist = namelist;
460 fdcon[s].c_output_name = xstrdup(oname);
461 fdcon[s].c_data = (char *) &fdcon[s].c_plen;
462 fdcon[s].c_len = 4;
463 fdcon[s].c_off = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000464 fdcon[s].c_keytype = keytype;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000465 gettimeofday(&fdcon[s].c_tv, NULL);
466 fdcon[s].c_tv.tv_sec += timeout;
467 TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000468 FD_SET(s, read_wait);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000469 ncon++;
470 return (s);
471}
472
Ben Lindstrombba81212001-06-25 05:01:22 +0000473static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000474confree(int s)
475{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000476 if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000477 fatal("confree: attempt to free bad fdno %d", s);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000478 close(s);
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000479 xfree(fdcon[s].c_namebase);
480 xfree(fdcon[s].c_output_name);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000481 if (fdcon[s].c_status == CS_KEYS)
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000482 xfree(fdcon[s].c_data);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000483 fdcon[s].c_status = CS_UNUSED;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000484 fdcon[s].c_keytype = 0;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000485 TAILQ_REMOVE(&tq, &fdcon[s], c_link);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000486 FD_CLR(s, read_wait);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000487 ncon--;
488}
489
Ben Lindstrombba81212001-06-25 05:01:22 +0000490static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000491contouch(int s)
492{
493 TAILQ_REMOVE(&tq, &fdcon[s], c_link);
494 gettimeofday(&fdcon[s].c_tv, NULL);
495 fdcon[s].c_tv.tv_sec += timeout;
496 TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
497}
498
Ben Lindstrombba81212001-06-25 05:01:22 +0000499static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000500conrecycle(int s)
501{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000502 con *c = &fdcon[s];
Ben Lindstrom965710f2002-07-07 22:17:22 +0000503 int ret;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000504
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000505 ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000506 confree(s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000507 return (ret);
508}
509
Ben Lindstrombba81212001-06-25 05:01:22 +0000510static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000511congreet(int s)
512{
Damien Millereccb9de2005-06-17 12:59:34 +1000513 int n = 0, remote_major = 0, remote_minor = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000514 char buf[256], *cp;
Damien Miller83c02ef2001-12-21 12:45:43 +1100515 char remote_version[sizeof buf];
Damien Millereccb9de2005-06-17 12:59:34 +1000516 size_t bufsiz;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000517 con *c = &fdcon[s];
518
Damien Miller4bbacb72005-11-05 15:12:28 +1100519 for (;;) {
520 memset(buf, '\0', sizeof(buf));
521 bufsiz = sizeof(buf);
522 cp = buf;
523 while (bufsiz-- &&
524 (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
525 if (*cp == '\r')
526 *cp = '\n';
527 cp++;
528 }
529 if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
530 break;
Ben Lindstromde8fc6f2001-08-06 22:43:50 +0000531 }
Ben Lindstrom6b28c352002-03-05 01:54:52 +0000532 if (n == 0) {
Damien Millerb253cc42005-05-26 12:23:44 +1000533 switch (errno) {
534 case EPIPE:
535 error("%s: Connection closed by remote host", c->c_name);
536 break;
537 case ECONNREFUSED:
538 break;
539 default:
540 error("read (%s): %s", c->c_name, strerror(errno));
541 break;
542 }
Ben Lindstrom6b28c352002-03-05 01:54:52 +0000543 conrecycle(s);
544 return;
545 }
Ben Lindstrom884a4ac2001-03-06 03:33:04 +0000546 if (*cp != '\n' && *cp != '\r') {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000547 error("%s: bad greeting", c->c_name);
548 confree(s);
549 return;
550 }
Ben Lindstrom884a4ac2001-03-06 03:33:04 +0000551 *cp = '\0';
Damien Miller83c02ef2001-12-21 12:45:43 +1100552 if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
553 &remote_major, &remote_minor, remote_version) == 3)
554 compat_datafellows(remote_version);
555 else
556 datafellows = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000557 if (c->c_keytype != KT_RSA1) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000558 if (!ssh2_capable(remote_major, remote_minor)) {
559 debug("%s doesn't support ssh2", c->c_name);
560 confree(s);
561 return;
562 }
Damien Miller83c02ef2001-12-21 12:45:43 +1100563 } else if (remote_major != 1) {
564 debug("%s doesn't support ssh1", c->c_name);
565 confree(s);
566 return;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000567 }
Ben Lindstromde8fc6f2001-08-06 22:43:50 +0000568 fprintf(stderr, "# %s %s\n", c->c_name, chop(buf));
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000569 n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
570 c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
571 c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
Damien Millereccb9de2005-06-17 12:59:34 +1000572 if (n < 0 || (size_t)n >= sizeof(buf)) {
Damien Miller41bfc292005-05-26 12:07:32 +1000573 error("snprintf: buffer too small");
574 confree(s);
575 return;
576 }
Damien Millereccb9de2005-06-17 12:59:34 +1000577 if (atomicio(vwrite, s, buf, n) != (size_t)n) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000578 error("write (%s): %s", c->c_name, strerror(errno));
579 confree(s);
580 return;
581 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000582 if (c->c_keytype != KT_RSA1) {
583 keyprint(c, keygrab_ssh2(c));
584 confree(s);
585 return;
586 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000587 c->c_status = CS_SIZE;
588 contouch(s);
589}
590
Ben Lindstrombba81212001-06-25 05:01:22 +0000591static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000592conread(int s)
593{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000594 con *c = &fdcon[s];
Damien Millerb253cc42005-05-26 12:23:44 +1000595 size_t n;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000596
597 if (c->c_status == CS_CON) {
598 congreet(s);
599 return;
600 }
Darren Tuckerfe6649d2004-08-13 21:19:37 +1000601 n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
Damien Millerb253cc42005-05-26 12:23:44 +1000602 if (n == 0) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000603 error("read (%s): %s", c->c_name, strerror(errno));
604 confree(s);
605 return;
606 }
607 c->c_off += n;
608
609 if (c->c_off == c->c_len)
610 switch (c->c_status) {
611 case CS_SIZE:
612 c->c_plen = htonl(c->c_plen);
613 c->c_len = c->c_plen + 8 - (c->c_plen & 7);
614 c->c_off = 0;
615 c->c_data = xmalloc(c->c_len);
616 c->c_status = CS_KEYS;
617 break;
618 case CS_KEYS:
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000619 keyprint(c, keygrab_ssh1(c));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000620 confree(s);
621 return;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000622 default:
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000623 fatal("conread: invalid status %d", c->c_status);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000624 break;
625 }
626
627 contouch(s);
628}
629
Ben Lindstrombba81212001-06-25 05:01:22 +0000630static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000631conloop(void)
632{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000633 struct timeval seltime, now;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000634 fd_set *r, *e;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000635 con *c;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000636 int i;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000637
638 gettimeofday(&now, NULL);
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000639 c = TAILQ_FIRST(&tq);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000640
Ben Lindstromd20b8552001-03-05 07:01:18 +0000641 if (c && (c->c_tv.tv_sec > now.tv_sec ||
642 (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000643 seltime = c->c_tv;
644 seltime.tv_sec -= now.tv_sec;
645 seltime.tv_usec -= now.tv_usec;
Ben Lindstromc791beb2001-02-10 23:18:11 +0000646 if (seltime.tv_usec < 0) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000647 seltime.tv_usec += 1000000;
648 seltime.tv_sec--;
649 }
650 } else
651 seltime.tv_sec = seltime.tv_usec = 0;
652
Damien Miller07d86be2006-03-26 14:19:21 +1100653 r = xcalloc(read_wait_nfdset, sizeof(fd_mask));
654 e = xcalloc(read_wait_nfdset, sizeof(fd_mask));
655 memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask));
656 memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask));
Ben Lindstromc1e04212001-03-05 07:04:38 +0000657
658 while (select(maxfd, r, NULL, e, &seltime) == -1 &&
Ben Lindstromf9452512001-02-15 03:12:08 +0000659 (errno == EAGAIN || errno == EINTR))
660 ;
661
Ben Lindstromd20b8552001-03-05 07:01:18 +0000662 for (i = 0; i < maxfd; i++) {
Ben Lindstromc1e04212001-03-05 07:04:38 +0000663 if (FD_ISSET(i, e)) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000664 error("%s: exception!", fdcon[i].c_name);
665 confree(i);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000666 } else if (FD_ISSET(i, r))
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000667 conread(i);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000668 }
Ben Lindstromc1e04212001-03-05 07:04:38 +0000669 xfree(r);
670 xfree(e);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000671
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000672 c = TAILQ_FIRST(&tq);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000673 while (c && (c->c_tv.tv_sec < now.tv_sec ||
674 (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000675 int s = c->c_fd;
Ben Lindstromd20b8552001-03-05 07:01:18 +0000676
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000677 c = TAILQ_NEXT(c, c_link);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000678 conrecycle(s);
679 }
680}
681
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000682static void
683do_host(char *host)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000684{
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000685 char *name = strnnsep(&host, " \t\n");
686 int j;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000687
Ben Lindstromeaffb9d2001-12-06 16:28:19 +0000688 if (name == NULL)
689 return;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000690 for (j = KT_RSA1; j <= KT_RSA; j *= 2) {
691 if (get_keytypes & j) {
692 while (ncon >= MAXCON)
693 conloop();
694 conalloc(name, *host ? host : name, j);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000695 }
696 }
697}
698
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000699void
700fatal(const char *fmt,...)
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000701{
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000702 va_list args;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000703
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000704 va_start(args, fmt);
705 do_log(SYSLOG_LEVEL_FATAL, fmt, args);
706 va_end(args);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000707 if (nonfatal_fatal)
708 longjmp(kexjmp, -1);
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000709 else
Darren Tucker3d326222003-09-22 21:11:20 +1000710 exit(255);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000711}
712
713static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000714usage(void)
715{
Damien Miller9a2fdbd2005-03-02 12:04:01 +1100716 fprintf(stderr, "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n"
Ben Lindstrom965710f2002-07-07 22:17:22 +0000717 "\t\t [host | addrlist namelist] [...]\n",
Ben Lindstromddfb1e32001-08-06 22:06:35 +0000718 __progname);
Ben Lindstromddfb1e32001-08-06 22:06:35 +0000719 exit(1);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000720}
721
722int
723main(int argc, char **argv)
724{
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000725 int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
726 int opt, fopt_count = 0;
727 char *tname;
Kevin Steves76e7d9b2001-09-20 20:30:09 +0000728
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000729 extern int optind;
730 extern char *optarg;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000731
Damien Miller59d3d5b2003-08-22 09:34:41 +1000732 __progname = ssh_get_progname(argv[0]);
Ben Lindstrom4e088e42001-10-10 20:45:43 +0000733 init_rng();
734 seed_rng();
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000735 TAILQ_INIT(&tq);
736
Darren Tuckerce321d82005-10-03 18:11:24 +1000737 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
738 sanitise_stdfd();
739
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000740 if (argc <= 1)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000741 usage();
742
Damien Millerdb7b8172005-03-01 21:48:03 +1100743 while ((opt = getopt(argc, argv, "Hv46p:T:t:f:")) != -1) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000744 switch (opt) {
Damien Millerdb7b8172005-03-01 21:48:03 +1100745 case 'H':
746 hash_hosts = 1;
747 break;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000748 case 'p':
749 ssh_port = a2port(optarg);
750 if (ssh_port == 0) {
751 fprintf(stderr, "Bad port '%s'\n", optarg);
752 exit(1);
753 }
754 break;
755 case 'T':
Ben Lindstromedd098b2002-07-04 00:07:13 +0000756 timeout = convtime(optarg);
757 if (timeout == -1 || timeout == 0) {
758 fprintf(stderr, "Bad timeout '%s'\n", optarg);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000759 usage();
Ben Lindstromedd098b2002-07-04 00:07:13 +0000760 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000761 break;
762 case 'v':
763 if (!debug_flag) {
764 debug_flag = 1;
765 log_level = SYSLOG_LEVEL_DEBUG1;
766 }
767 else if (log_level < SYSLOG_LEVEL_DEBUG3)
768 log_level++;
769 else
770 fatal("Too high debugging level.");
771 break;
Kevin Steves76e7d9b2001-09-20 20:30:09 +0000772 case 'f':
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000773 if (strcmp(optarg, "-") == 0)
774 optarg = NULL;
775 argv[fopt_count++] = optarg;
776 break;
777 case 't':
778 get_keytypes = 0;
779 tname = strtok(optarg, ",");
780 while (tname) {
781 int type = key_type_from_name(tname);
782 switch (type) {
783 case KEY_RSA1:
784 get_keytypes |= KT_RSA1;
785 break;
786 case KEY_DSA:
787 get_keytypes |= KT_DSA;
788 break;
789 case KEY_RSA:
790 get_keytypes |= KT_RSA;
791 break;
792 case KEY_UNSPEC:
Ben Lindstrom28c603b2001-12-06 16:45:10 +0000793 fatal("unknown key type %s", tname);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000794 }
795 tname = strtok(NULL, ",");
796 }
797 break;
798 case '4':
799 IPv4or6 = AF_INET;
800 break;
801 case '6':
802 IPv4or6 = AF_INET6;
803 break;
804 case '?':
805 default:
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000806 usage();
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000807 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000808 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000809 if (optind == argc && !fopt_count)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000810 usage();
811
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000812 log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000813
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000814 maxfd = fdlim_get(1);
815 if (maxfd < 0)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000816 fatal("%s: fdlim_get: bad value", __progname);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000817 if (maxfd > MAXMAXFD)
818 maxfd = MAXMAXFD;
Ben Lindstromd20b8552001-03-05 07:01:18 +0000819 if (MAXCON <= 0)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000820 fatal("%s: not enough file descriptors", __progname);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000821 if (maxfd > fdlim_get(0))
822 fdlim_set(maxfd);
Damien Miller07d86be2006-03-26 14:19:21 +1100823 fdcon = xcalloc(maxfd, sizeof(con));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000824
Damien Miller07d86be2006-03-26 14:19:21 +1100825 read_wait_nfdset = howmany(maxfd, NFDBITS);
826 read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask));
Ben Lindstromc1e04212001-03-05 07:04:38 +0000827
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000828 if (fopt_count) {
829 Linebuf *lb;
830 char *line;
831 int j;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000832
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000833 for (j = 0; j < fopt_count; j++) {
834 lb = Linebuf_alloc(argv[j], error);
Ben Lindstrom78bbd9e2001-09-12 17:10:40 +0000835 if (!lb)
836 continue;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000837 while ((line = Linebuf_getline(lb)) != NULL)
838 do_host(line);
839 Linebuf_free(lb);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000840 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000841 }
842
843 while (optind < argc)
844 do_host(argv[optind++]);
845
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000846 while (ncon > 0)
847 conloop();
848
849 return (0);
850}