ipropd_slave.c revision eb1a5f8de9f7ea602c373a710f531abbf81141c4
1/*
2 * Copyright (c) 1997 - 2008 Kungliga Tekniska H��gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "iprop.h"
35
36RCSID("$Id$");
37
38static const char *config_name = "ipropd-slave";
39
40static krb5_log_facility *log_facility;
41static char five_min[] = "5 min";
42static char *server_time_lost = five_min;
43static int time_before_lost;
44const char *slave_str = NULL;
45
46static int
47connect_to_master (krb5_context context, const char *master,
48		   const char *port_str)
49{
50    char port[NI_MAXSERV];
51    struct addrinfo *ai, *a;
52    struct addrinfo hints;
53    int error;
54    int s = -1;
55
56    memset (&hints, 0, sizeof(hints));
57    hints.ai_socktype = SOCK_STREAM;
58
59    if (port_str == NULL) {
60	snprintf(port, sizeof(port), "%u", IPROP_PORT);
61	port_str = port;
62    }
63
64    error = getaddrinfo (master, port_str, &hints, &ai);
65    if (error) {
66	krb5_warnx(context, "Failed to get address of to %s: %s",
67		   master, gai_strerror(error));
68	return -1;
69    }
70
71    for (a = ai; a != NULL; a = a->ai_next) {
72	char node[NI_MAXHOST];
73	error = getnameinfo(a->ai_addr, a->ai_addrlen,
74			    node, sizeof(node), NULL, 0, NI_NUMERICHOST);
75	if (error)
76	    strlcpy(node, "[unknown-addr]", sizeof(node));
77
78	s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
79	if (s < 0)
80	    continue;
81	if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
82	    krb5_warn(context, errno, "connection failed to %s[%s]",
83		      master, node);
84	    close (s);
85	    continue;
86	}
87	krb5_warnx(context, "connection successful "
88		   "to master: %s[%s]", master, node);
89	break;
90    }
91    freeaddrinfo (ai);
92
93    if (a == NULL)
94	return -1;
95
96    return s;
97}
98
99static void
100get_creds(krb5_context context, const char *keytab_str,
101	  krb5_ccache *cache, const char *serverhost)
102{
103    krb5_keytab keytab;
104    krb5_principal client;
105    krb5_error_code ret;
106    krb5_get_init_creds_opt *init_opts;
107    krb5_creds creds;
108    char *server;
109    char keytab_buf[256];
110
111    if (keytab_str == NULL) {
112	ret = krb5_kt_default_name (context, keytab_buf, sizeof(keytab_buf));
113	if (ret)
114	    krb5_err (context, 1, ret, "krb5_kt_default_name");
115	keytab_str = keytab_buf;
116    }
117
118    ret = krb5_kt_resolve(context, keytab_str, &keytab);
119    if(ret)
120	krb5_err(context, 1, ret, "%s", keytab_str);
121
122
123    ret = krb5_sname_to_principal (context, slave_str, IPROP_NAME,
124				   KRB5_NT_SRV_HST, &client);
125    if (ret) krb5_err(context, 1, ret, "krb5_sname_to_principal");
126
127    ret = krb5_get_init_creds_opt_alloc(context, &init_opts);
128    if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
129
130    asprintf (&server, "%s/%s", IPROP_NAME, serverhost);
131    if (server == NULL)
132	krb5_errx (context, 1, "malloc: no memory");
133
134    ret = krb5_get_init_creds_keytab(context, &creds, client, keytab,
135				     0, server, init_opts);
136    free (server);
137    krb5_get_init_creds_opt_free(context, init_opts);
138    if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
139
140    ret = krb5_kt_close(context, keytab);
141    if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
142
143    ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, cache);
144    if(ret) krb5_err(context, 1, ret, "krb5_cc_new_unique");
145
146    ret = krb5_cc_initialize(context, *cache, client);
147    if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
148
149    ret = krb5_cc_store_cred(context, *cache, &creds);
150    if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
151
152    krb5_free_cred_contents(context, &creds);
153    krb5_free_principal(context, client);
154}
155
156static krb5_error_code
157ihave (krb5_context context, krb5_auth_context auth_context,
158       int fd, uint32_t version)
159{
160    int ret;
161    u_char buf[8];
162    krb5_storage *sp;
163    krb5_data data;
164
165    sp = krb5_storage_from_mem (buf, 8);
166    krb5_store_int32 (sp, I_HAVE);
167    krb5_store_int32 (sp, version);
168    krb5_storage_free (sp);
169    data.length = 8;
170    data.data   = buf;
171
172    ret = krb5_write_priv_message(context, auth_context, &fd, &data);
173    if (ret)
174	krb5_warn (context, ret, "krb5_write_message");
175    return ret;
176}
177
178static void
179receive_loop (krb5_context context,
180	      krb5_storage *sp,
181	      kadm5_server_context *server_context)
182{
183    int ret;
184    off_t left, right;
185    void *buf;
186    int32_t vers, vers2;
187    ssize_t sret;
188
189    /*
190     * Seek to the current version of the local database.
191     */
192    do {
193	int32_t len, timestamp, tmp;
194	enum kadm_ops op;
195
196	if(krb5_ret_int32 (sp, &vers) != 0)
197	    return;
198	krb5_ret_int32 (sp, &timestamp);
199	krb5_ret_int32 (sp, &tmp);
200	op = tmp;
201	krb5_ret_int32 (sp, &len);
202	if ((uint32_t)vers <= server_context->log_context.version)
203	    krb5_storage_seek(sp, len + 8, SEEK_CUR);
204    } while((uint32_t)vers <= server_context->log_context.version);
205
206    /*
207     * Read up rest of the entires into the memory...
208     */
209    left  = krb5_storage_seek (sp, -16, SEEK_CUR);
210    right = krb5_storage_seek (sp, 0, SEEK_END);
211    buf = malloc (right - left);
212    if (buf == NULL && (right - left) != 0)
213	krb5_errx (context, 1, "malloc: no memory");
214
215    /*
216     * ...and then write them out to the on-disk log.
217     */
218    krb5_storage_seek (sp, left, SEEK_SET);
219    krb5_storage_read (sp, buf, right - left);
220    sret = write (server_context->log_context.log_fd, buf, right-left);
221    if (sret != right - left)
222	krb5_err(context, 1, errno, "Failed to write log to disk");
223    ret = fsync (server_context->log_context.log_fd);
224    if (ret)
225	krb5_err(context, 1, errno, "Failed to sync log to disk");
226    free (buf);
227
228    /*
229     * Go back to the startpoint and start to commit the entires to
230     * the database.
231     */
232    krb5_storage_seek (sp, left, SEEK_SET);
233
234    for(;;) {
235	int32_t len, len2, timestamp, tmp;
236	off_t cur, cur2;
237	enum kadm_ops op;
238
239	if(krb5_ret_int32 (sp, &vers) != 0)
240	    break;
241	ret = krb5_ret_int32 (sp, &timestamp);
242	if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
243	ret = krb5_ret_int32 (sp, &tmp);
244	if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
245	op = tmp;
246	ret = krb5_ret_int32 (sp, &len);
247	if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
248	if (len < 0)
249	    krb5_errx(context, 1, "log is corrupted, "
250		      "negative length of entry version %ld: %ld",
251		      (long)vers, (long)len);
252	cur = krb5_storage_seek(sp, 0, SEEK_CUR);
253
254	krb5_warnx (context, "replaying entry %d", (int)vers);
255
256	ret = kadm5_log_replay (server_context,
257				op, vers, len, sp);
258	if (ret) {
259	    const char *s = krb5_get_error_message(server_context->context, ret);
260	    krb5_warnx (context,
261			"kadm5_log_replay: %ld. Lost entry entry, "
262			"Database out of sync ?: %s (%d)",
263			(long)vers, s ? s : "unknown error", ret);
264	    krb5_free_error_message(context, s);
265	}
266
267	{
268	    /*
269	     * Make sure the krb5_log_replay does the right thing wrt
270	     * reading out data from the sp.
271	     */
272	    cur2 = krb5_storage_seek(sp, 0, SEEK_CUR);
273	    if (cur + len != cur2)
274		krb5_errx(context, 1,
275			  "kadm5_log_reply version: %ld didn't read the whole entry",
276			  (long)vers);
277	}
278
279	if (krb5_ret_int32 (sp, &len2) != 0)
280	    krb5_errx(context, 1, "entry %ld: postamble too short", (long)vers);
281	if(krb5_ret_int32 (sp, &vers2) != 0)
282	    krb5_errx(context, 1, "entry %ld: postamble too short", (long)vers);
283
284	if (len != len2)
285	    krb5_errx(context, 1, "entry %ld: len != len2", (long)vers);
286	if (vers != vers2)
287	    krb5_errx(context, 1, "entry %ld: vers != vers2", (long)vers);
288    }
289
290    /*
291     * Update version
292     */
293
294    server_context->log_context.version = vers;
295}
296
297static void
298receive (krb5_context context,
299	 krb5_storage *sp,
300	 kadm5_server_context *server_context)
301{
302    int ret;
303
304    ret = server_context->db->hdb_open(context,
305				       server_context->db,
306				       O_RDWR | O_CREAT, 0600);
307    if (ret)
308	krb5_err (context, 1, ret, "db->open");
309
310    receive_loop (context, sp, server_context);
311
312    ret = server_context->db->hdb_close (context, server_context->db);
313    if (ret)
314	krb5_err (context, 1, ret, "db->close");
315}
316
317static void
318send_im_here (krb5_context context, int fd,
319	      krb5_auth_context auth_context)
320{
321    krb5_storage *sp;
322    krb5_data data;
323    int ret;
324
325    ret = krb5_data_alloc (&data, 4);
326    if (ret)
327	krb5_err (context, 1, ret, "send_im_here");
328
329    sp = krb5_storage_from_data (&data);
330    if (sp == NULL)
331	krb5_errx (context, 1, "krb5_storage_from_data");
332    krb5_store_int32(sp, I_AM_HERE);
333    krb5_storage_free(sp);
334
335    ret = krb5_write_priv_message(context, auth_context, &fd, &data);
336    krb5_data_free(&data);
337
338    if (ret)
339	krb5_err (context, 1, ret, "krb5_write_priv_message");
340}
341
342static krb5_error_code
343receive_everything (krb5_context context, int fd,
344		    kadm5_server_context *server_context,
345		    krb5_auth_context auth_context)
346{
347    int ret;
348    krb5_data data;
349    int32_t vno = 0;
350    int32_t opcode;
351    krb5_storage *sp;
352
353    char *dbname;
354    HDB *mydb;
355
356    krb5_warnx(context, "receive complete database");
357
358    asprintf(&dbname, "%s-NEW", server_context->db->hdb_name);
359    ret = hdb_create(context, &mydb, dbname);
360    if(ret)
361	krb5_err(context,1, ret, "hdb_create");
362    free(dbname);
363
364    ret = hdb_set_master_keyfile (context,
365				  mydb, server_context->config.stash_file);
366    if(ret)
367	krb5_err(context,1, ret, "hdb_set_master_keyfile");
368
369    /* I really want to use O_EXCL here, but given that I can't easily clean
370       up on error, I won't */
371    ret = mydb->hdb_open(context, mydb, O_RDWR | O_CREAT | O_TRUNC, 0600);
372    if (ret)
373	krb5_err (context, 1, ret, "db->open");
374
375    sp = NULL;
376    do {
377	ret = krb5_read_priv_message(context, auth_context, &fd, &data);
378
379	if (ret) {
380	    krb5_warn (context, ret, "krb5_read_priv_message");
381	    goto cleanup;
382	}
383
384	sp = krb5_storage_from_data (&data);
385	if (sp == NULL)
386	    krb5_errx (context, 1, "krb5_storage_from_data");
387	krb5_ret_int32 (sp, &opcode);
388	if (opcode == ONE_PRINC) {
389	    krb5_data fake_data;
390	    hdb_entry_ex entry;
391
392	    krb5_storage_free(sp);
393
394	    fake_data.data   = (char *)data.data + 4;
395	    fake_data.length = data.length - 4;
396
397	    memset(&entry, 0, sizeof(entry));
398
399	    ret = hdb_value2entry (context, &fake_data, &entry.entry);
400	    if (ret)
401		krb5_err (context, 1, ret, "hdb_value2entry");
402	    ret = mydb->hdb_store(server_context->context,
403				  mydb,
404				  0, &entry);
405	    if (ret)
406		krb5_err (context, 1, ret, "hdb_store");
407
408	    hdb_free_entry (context, &entry);
409	    krb5_data_free (&data);
410	} else if (opcode == NOW_YOU_HAVE)
411	    ;
412	else
413	    krb5_errx (context, 1, "strange opcode %d", opcode);
414    } while (opcode == ONE_PRINC);
415
416    if (opcode != NOW_YOU_HAVE)
417	krb5_errx (context, 1, "receive_everything: strange %d", opcode);
418
419    krb5_ret_int32 (sp, &vno);
420    krb5_storage_free(sp);
421
422    ret = kadm5_log_reinit (server_context);
423    if (ret)
424	krb5_err(context, 1, ret, "kadm5_log_reinit");
425
426    ret = kadm5_log_set_version (server_context, vno - 1);
427    if (ret)
428	krb5_err (context, 1, ret, "kadm5_log_set_version");
429
430    ret = kadm5_log_nop (server_context);
431    if (ret)
432	krb5_err (context, 1, ret, "kadm5_log_nop");
433
434    ret = mydb->hdb_rename (context, mydb, server_context->db->hdb_name);
435    if (ret)
436	krb5_err (context, 1, ret, "db->rename");
437
438 cleanup:
439    krb5_data_free (&data);
440
441    ret = mydb->hdb_close (context, mydb);
442    if (ret)
443	krb5_err (context, 1, ret, "db->close");
444
445    ret = mydb->hdb_destroy (context, mydb);
446    if (ret)
447	krb5_err (context, 1, ret, "db->destroy");
448
449    krb5_warnx(context, "receive complete database, version %ld", (long)vno);
450    return ret;
451}
452
453static char *config_file;
454static char *realm;
455static int version_flag;
456static int help_flag;
457static char *keytab_str;
458static char *port_str;
459#ifdef SUPPORT_DETACH
460static int detach_from_console = 0;
461#endif
462
463static struct getargs args[] = {
464    { "config-file", 'c', arg_string, &config_file, NULL, NULL },
465    { "realm", 'r', arg_string, &realm, NULL, NULL },
466    { "keytab", 'k', arg_string, &keytab_str,
467      "keytab to get authentication from", "kspec" },
468    { "time-lost", 0, arg_string, &server_time_lost,
469      "time before server is considered lost", "time" },
470    { "port", 0, arg_string, &port_str,
471      "port ipropd-slave will connect to", "port"},
472#ifdef SUPPORT_DETACH
473    { "detach", 0, arg_flag, &detach_from_console,
474      "detach from console", NULL },
475#endif
476    { "hostname", 0, arg_string, rk_UNCONST(&slave_str),
477      "hostname of slave (if not same as hostname)", "hostname" },
478    { "version", 0, arg_flag, &version_flag, NULL, NULL },
479    { "help", 0, arg_flag, &help_flag, NULL, NULL }
480};
481
482static int num_args = sizeof(args) / sizeof(args[0]);
483
484static void
485usage(int status)
486{
487    arg_printusage(args, num_args, NULL, "master");
488    exit(status);
489}
490
491int
492main(int argc, char **argv)
493{
494    krb5_error_code ret;
495    krb5_context context;
496    krb5_auth_context auth_context;
497    void *kadm_handle;
498    kadm5_server_context *server_context;
499    kadm5_config_params conf;
500    int master_fd;
501    krb5_ccache ccache;
502    krb5_principal server;
503    char **files;
504    int optidx = 0;
505    time_t reconnect_min;
506    time_t backoff;
507    time_t reconnect_max;
508    time_t reconnect;
509    time_t before = 0;
510
511    const char *master;
512
513    setprogname(argv[0]);
514
515    if(getarg(args, num_args, argc, argv, &optidx))
516	usage(1);
517
518    if(help_flag)
519	usage(0);
520    if(version_flag) {
521	print_version(NULL);
522	exit(0);
523    }
524
525    ret = krb5_init_context(&context);
526    if (ret)
527	errx (1, "krb5_init_context failed: %d", ret);
528
529    setup_signal();
530
531    if (config_file == NULL) {
532	if (asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context)) == -1
533	    || config_file == NULL)
534	    errx(1, "out of memory");
535    }
536
537    ret = krb5_prepend_config_files_default(config_file, &files);
538    if (ret)
539	krb5_err(context, 1, ret, "getting configuration files");
540
541    ret = krb5_set_config_files(context, files);
542    krb5_free_config_files(files);
543    if (ret)
544	krb5_err(context, 1, ret, "reading configuration files");
545
546    argc -= optidx;
547    argv += optidx;
548
549    if (argc != 1)
550	usage(1);
551
552    master = argv[0];
553
554#ifdef SUPPORT_DETACH
555    if (detach_from_console)
556	daemon(0, 0);
557#endif
558    pidfile (NULL);
559    krb5_openlog (context, "ipropd-slave", &log_facility);
560    krb5_set_warn_dest(context, log_facility);
561
562    ret = krb5_kt_register(context, &hdb_kt_ops);
563    if(ret)
564	krb5_err(context, 1, ret, "krb5_kt_register");
565
566    time_before_lost = parse_time (server_time_lost,  "s");
567    if (time_before_lost < 0)
568	krb5_errx (context, 1, "couldn't parse time: %s", server_time_lost);
569
570    memset(&conf, 0, sizeof(conf));
571    if(realm) {
572	conf.mask |= KADM5_CONFIG_REALM;
573	conf.realm = realm;
574    }
575    ret = kadm5_init_with_password_ctx (context,
576					KADM5_ADMIN_SERVICE,
577					NULL,
578					KADM5_ADMIN_SERVICE,
579					&conf, 0, 0,
580					&kadm_handle);
581    if (ret)
582	krb5_err (context, 1, ret, "kadm5_init_with_password_ctx");
583
584    server_context = (kadm5_server_context *)kadm_handle;
585
586    ret = kadm5_log_init (server_context);
587    if (ret)
588	krb5_err (context, 1, ret, "kadm5_log_init");
589
590    get_creds(context, keytab_str, &ccache, master);
591
592    ret = krb5_sname_to_principal (context, master, IPROP_NAME,
593				   KRB5_NT_SRV_HST, &server);
594    if (ret)
595	krb5_err (context, 1, ret, "krb5_sname_to_principal");
596
597    auth_context = NULL;
598    master_fd = -1;
599
600    krb5_appdefault_time(context, config_name, NULL, "reconnect-min",
601			 10, &reconnect_min);
602    krb5_appdefault_time(context, config_name, NULL, "reconnect-max",
603			 300, &reconnect_max);
604    krb5_appdefault_time(context, config_name, NULL, "reconnect-backoff",
605			 10, &backoff);
606    reconnect = reconnect_min;
607
608    while (!exit_flag) {
609	time_t now, elapsed;
610	int connected = FALSE;
611
612	now = time(NULL);
613	elapsed = now - before;
614
615	if (elapsed < reconnect) {
616	    time_t left = reconnect - elapsed;
617	    krb5_warnx(context, "sleeping %d seconds before "
618		       "retrying to connect", (int)left);
619	    sleep(left);
620	}
621	before = now;
622
623	master_fd = connect_to_master (context, master, port_str);
624	if (master_fd < 0)
625	    goto retry;
626
627	reconnect = reconnect_min;
628
629	if (auth_context) {
630	    krb5_auth_con_free(context, auth_context);
631	    auth_context = NULL;
632	    krb5_cc_destroy(context, ccache);
633	    get_creds(context, keytab_str, &ccache, master);
634	}
635	ret = krb5_sendauth (context, &auth_context, &master_fd,
636			     IPROP_VERSION, NULL, server,
637			     AP_OPTS_MUTUAL_REQUIRED, NULL, NULL,
638			     ccache, NULL, NULL, NULL);
639	if (ret) {
640	    krb5_warn (context, ret, "krb5_sendauth");
641	    goto retry;
642	}
643
644	krb5_warnx(context, "ipropd-slave started at version: %ld",
645		   (long)server_context->log_context.version);
646
647	ret = ihave (context, auth_context, master_fd,
648		     server_context->log_context.version);
649	if (ret)
650	    goto retry;
651
652	connected = TRUE;
653
654	while (connected && !exit_flag) {
655	    krb5_data out;
656	    krb5_storage *sp;
657	    int32_t tmp;
658	    fd_set readset;
659	    struct timeval to;
660
661#ifndef NO_LIMIT_FD_SETSIZE
662	    if (master_fd >= FD_SETSIZE)
663		krb5_errx (context, 1, "fd too large");
664#endif
665
666	    FD_ZERO(&readset);
667	    FD_SET(master_fd, &readset);
668
669	    to.tv_sec = time_before_lost;
670	    to.tv_usec = 0;
671
672	    ret = select (master_fd + 1,
673			  &readset, NULL, NULL, &to);
674	    if (ret < 0) {
675		if (errno == EINTR)
676		    continue;
677		else
678		    krb5_err (context, 1, errno, "select");
679	    }
680	    if (ret == 0)
681		krb5_errx (context, 1, "server didn't send a message "
682			   "in %d seconds", time_before_lost);
683
684	    ret = krb5_read_priv_message(context, auth_context, &master_fd, &out);
685	    if (ret) {
686		krb5_warn (context, ret, "krb5_read_priv_message");
687		connected = FALSE;
688		continue;
689	    }
690
691	    sp = krb5_storage_from_mem (out.data, out.length);
692	    krb5_ret_int32 (sp, &tmp);
693	    switch (tmp) {
694	    case FOR_YOU :
695		receive (context, sp, server_context);
696		ret = ihave (context, auth_context, master_fd,
697			     server_context->log_context.version);
698		if (ret)
699		    connected = FALSE;
700		break;
701	    case TELL_YOU_EVERYTHING :
702		ret = receive_everything (context, master_fd, server_context,
703					  auth_context);
704		if (ret)
705		    connected = FALSE;
706		break;
707	    case ARE_YOU_THERE :
708		send_im_here (context, master_fd, auth_context);
709		break;
710	    case NOW_YOU_HAVE :
711	    case I_HAVE :
712	    case ONE_PRINC :
713	    case I_AM_HERE :
714	    default :
715		krb5_warnx (context, "Ignoring command %d", tmp);
716		break;
717	    }
718	    krb5_storage_free (sp);
719	    krb5_data_free (&out);
720
721	}
722    retry:
723	if (connected == FALSE)
724	    krb5_warnx (context, "disconnected for server");
725	if (exit_flag)
726	    krb5_warnx (context, "got an exit signal");
727
728	if (master_fd >= 0)
729	    close(master_fd);
730
731	reconnect += backoff;
732	if (reconnect > reconnect_max)
733	    reconnect = reconnect_max;
734    }
735
736    if (0);
737#ifndef NO_SIGXCPU
738    else if(exit_flag == SIGXCPU)
739	krb5_warnx(context, "%s CPU time limit exceeded", getprogname());
740#endif
741    else if(exit_flag == SIGINT || exit_flag == SIGTERM)
742	krb5_warnx(context, "%s terminated", getprogname());
743    else
744	krb5_warnx(context, "%s unexpected exit reason: %ld",
745		       getprogname(), (long)exit_flag);
746
747    return 0;
748}
749