2 * Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 RCSID("$Id: ipropd_master.c,v 1.28 2002/08/16 18:27:53 joda Exp $");
39 static krb5_log_facility *log_facility;
42 make_signal_socket (krb5_context context)
44 struct sockaddr_un addr;
47 fd = socket (AF_UNIX, SOCK_DGRAM, 0);
49 krb5_err (context, 1, errno, "socket AF_UNIX");
50 memset (&addr, 0, sizeof(addr));
51 addr.sun_family = AF_UNIX;
52 strlcpy (addr.sun_path, KADM5_LOG_SIGNAL, sizeof(addr.sun_path));
53 unlink (addr.sun_path);
54 if (bind (fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
55 krb5_err (context, 1, errno, "bind %s", addr.sun_path);
60 make_listen_socket (krb5_context context)
64 struct sockaddr_in addr;
66 fd = socket (AF_INET, SOCK_STREAM, 0);
68 krb5_err (context, 1, errno, "socket AF_INET");
69 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
70 memset (&addr, 0, sizeof(addr));
71 addr.sin_family = AF_INET;
72 addr.sin_port = krb5_getportbyname (context,
73 IPROP_SERVICE, "tcp", IPROP_PORT);
74 if(bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
75 krb5_err (context, 1, errno, "bind");
76 if (listen(fd, SOMAXCONN) < 0)
77 krb5_err (context, 1, errno, "listen");
83 struct sockaddr_in addr;
89 #define SLAVE_F_DEAD 0x1
93 typedef struct slave slave;
96 check_acl (krb5_context context, const char *name)
102 fp = fopen (KADM5_SLAVE_ACL, "r");
105 while (fgets(buf, sizeof(buf), fp) != NULL) {
106 if (buf[strlen(buf) - 1 ] == '\n')
107 buf[strlen(buf) - 1 ] = '\0';
108 if (strcmp (buf, name) == 0) {
120 s->seen = time(NULL);
126 s->flags |= SLAVE_F_DEAD;
131 remove_slave (krb5_context context, slave *s, slave **root)
140 krb5_auth_con_free (context, s->ac);
142 for (p = root; *p; p = &(*p)->next)
151 add_slave (krb5_context context, krb5_keytab keytab, slave **root, int fd)
153 krb5_principal server;
157 krb5_ticket *ticket = NULL;
160 s = malloc(sizeof(*s));
162 krb5_warnx (context, "add_slave: no memory");
168 addr_len = sizeof(s->addr);
169 s->fd = accept (fd, (struct sockaddr *)&s->addr, &addr_len);
171 krb5_warn (context, errno, "accept");
174 gethostname(hostname, sizeof(hostname));
175 ret = krb5_sname_to_principal (context, hostname, IPROP_NAME,
176 KRB5_NT_SRV_HST, &server);
178 krb5_warn (context, ret, "krb5_sname_to_principal");
182 ret = krb5_recvauth (context, &s->ac, &s->fd,
183 IPROP_VERSION, server, 0, keytab, &ticket);
184 krb5_free_principal (context, server);
186 krb5_warn (context, ret, "krb5_recvauth");
189 ret = krb5_unparse_name (context, ticket->client, &s->name);
191 krb5_warn (context, ret, "krb5_unparse_name");
194 if (check_acl (context, s->name)) {
195 krb5_warnx (context, "%s not in acl", s->name);
198 krb5_free_ticket (context, ticket);
205 if (strcmp(l->name, s->name) == 0)
210 if (l->flags & SLAVE_F_DEAD) {
211 remove_slave(context, l, root);
213 krb5_warnx (context, "second connection from %s", s->name);
219 krb5_warnx (context, "connection from %s", s->name);
228 remove_slave(context, s, root);
231 struct prop_context {
232 krb5_auth_context auth_context;
237 prop_one (krb5_context context, HDB *db, hdb_entry *entry, void *v)
241 struct slave *slave = (struct slave *)v;
243 ret = hdb_entry2value (context, entry, &data);
246 ret = krb5_data_realloc (&data, data.length + 4);
248 krb5_data_free (&data);
251 memmove ((char *)data.data + 4, data.data, data.length - 4);
252 _krb5_put_int (data.data, ONE_PRINC, 4);
254 ret = krb5_write_priv_message (context, slave->ac, &slave->fd, &data);
255 krb5_data_free (&data);
260 send_complete (krb5_context context, slave *s,
261 const char *database, u_int32_t current_version)
268 ret = hdb_create (context, &db, database);
270 krb5_err (context, 1, ret, "hdb_create: %s", database);
271 ret = db->open (context, db, O_RDONLY, 0);
273 krb5_err (context, 1, ret, "db->open");
275 _krb5_put_int(buf, TELL_YOU_EVERYTHING, 4);
280 ret = krb5_write_priv_message(context, s->ac, &s->fd, &data);
283 krb5_warn (context, ret, "krb5_write_priv_message");
288 ret = hdb_foreach (context, db, 0, prop_one, s);
290 krb5_warn (context, ret, "hdb_foreach");
295 _krb5_put_int (buf, NOW_YOU_HAVE, 4);
296 _krb5_put_int (buf + 4, current_version, 4);
299 s->version = current_version;
301 ret = krb5_write_priv_message(context, s->ac, &s->fd, &data);
304 krb5_warn (context, ret, "krb5_write_priv_message");
314 send_diffs (krb5_context context, slave *s, int log_fd,
315 const char *database, u_int32_t current_version)
326 if (s->version == current_version)
329 if (s->flags & SLAVE_F_DEAD)
332 sp = kadm5_log_goto_end (log_fd);
333 right = krb5_storage_seek(sp, 0, SEEK_CUR);
335 if (kadm5_log_previous (sp, &ver, ×tamp, &op, &len))
337 left = krb5_storage_seek(sp, -16, SEEK_CUR);
338 if (ver == s->version)
340 if (ver == s->version + 1)
343 return send_complete (context, s, database, current_version);
345 krb5_data_alloc (&data, right - left + 4);
346 krb5_storage_read (sp, (char *)data.data + 4, data.length - 4);
347 krb5_storage_free(sp);
349 _krb5_put_int(data.data, FOR_YOU, 4);
351 ret = krb5_write_priv_message(context, s->ac, &s->fd, &data);
352 krb5_data_free(&data);
355 krb5_warn (context, ret, "krb5_write_priv_message");
365 process_msg (krb5_context context, slave *s, int log_fd,
366 const char *database, u_int32_t current_version)
373 ret = krb5_read_priv_message(context, s->ac, &s->fd, &out);
375 krb5_warn (context, ret, "error reading message from %s", s->name);
379 sp = krb5_storage_from_mem (out.data, out.length);
380 krb5_ret_int32 (sp, &tmp);
383 krb5_ret_int32 (sp, &tmp);
385 ret = send_diffs (context, s, log_fd, database, current_version);
389 krb5_warnx (context, "Ignoring command %d", tmp);
393 krb5_data_free (&out);
400 #define SLAVE_NAME "Name"
401 #define SLAVE_ADDRESS "Address"
402 #define SLAVE_VERSION "Version"
403 #define SLAVE_STATUS "Status"
404 #define SLAVE_SEEN "Last Seen"
407 write_stats(krb5_context context, slave *slaves, u_int32_t current_version)
411 time_t t = time(NULL);
414 fp = fopen(KADM5_SLAVE_STATS, "w");
418 strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S",
420 fprintf(fp, "Status for slaves, last updated: %s\n\n", str);
422 fprintf(fp, "Master version: %lu\n\n", (unsigned long)current_version);
430 rtbl_add_column(tbl, SLAVE_NAME, 0);
431 rtbl_add_column(tbl, SLAVE_ADDRESS, 0);
432 rtbl_add_column(tbl, SLAVE_VERSION, RTBL_ALIGN_RIGHT);
433 rtbl_add_column(tbl, SLAVE_STATUS, 0);
434 rtbl_add_column(tbl, SLAVE_SEEN, 0);
436 rtbl_set_prefix(tbl, " ");
437 rtbl_set_column_prefix(tbl, SLAVE_NAME, "");
442 rtbl_add_column_entry(tbl, SLAVE_NAME, slaves->name);
443 ret = krb5_sockaddr2address (context,
444 (struct sockaddr*)&slaves->addr, &addr);
446 krb5_print_address(&addr, str, sizeof(str), NULL);
447 krb5_free_address(context, &addr);
448 rtbl_add_column_entry(tbl, SLAVE_ADDRESS, str);
450 rtbl_add_column_entry(tbl, SLAVE_ADDRESS, "<unknown>");
452 snprintf(str, sizeof(str), "%u", (unsigned)slaves->version);
453 rtbl_add_column_entry(tbl, SLAVE_VERSION, str);
455 if (slaves->flags & SLAVE_F_DEAD)
456 rtbl_add_column_entry(tbl, SLAVE_STATUS, "Down");
458 rtbl_add_column_entry(tbl, SLAVE_STATUS, "Up");
460 strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S",
461 localtime(&slaves->seen));
462 rtbl_add_column_entry(tbl, SLAVE_SEEN, str);
464 slaves = slaves->next;
467 rtbl_format(tbl, fp);
475 static int version_flag;
476 static int help_flag;
477 static char *keytab_str = "HDB:";
478 static char *database;
480 static struct getargs args[] = {
481 { "realm", 'r', arg_string, &realm },
482 { "keytab", 'k', arg_string, &keytab_str,
483 "keytab to get authentication from", "kspec" },
484 { "database", 'd', arg_string, &database, "database", "file"},
485 { "version", 0, arg_flag, &version_flag },
486 { "help", 0, arg_flag, &help_flag }
488 static int num_args = sizeof(args) / sizeof(args[0]);
491 main(int argc, char **argv)
494 krb5_context context;
496 kadm5_server_context *server_context;
497 kadm5_config_params conf;
498 int signal_fd, listen_fd;
500 slave *slaves = NULL;
501 u_int32_t current_version, old_version = 0;
505 optind = krb5_program_setup(&context, argc, argv, args, num_args, NULL);
508 krb5_std_usage(0, args, num_args);
515 krb5_openlog (context, "ipropd-master", &log_facility);
516 krb5_set_warn_dest(context, log_facility);
518 ret = krb5_kt_register(context, &hdb_kt_ops);
520 krb5_err(context, 1, ret, "krb5_kt_register");
522 ret = krb5_kt_resolve(context, keytab_str, &keytab);
524 krb5_err(context, 1, ret, "krb5_kt_resolve: %s", keytab_str);
526 memset(&conf, 0, sizeof(conf));
528 conf.mask |= KADM5_CONFIG_REALM;
531 ret = kadm5_init_with_skey_ctx (context,
538 krb5_err (context, 1, ret, "kadm5_init_with_password_ctx");
540 server_context = (kadm5_server_context *)kadm_handle;
542 log_fd = open (server_context->log_context.log_file, O_RDONLY, 0);
544 krb5_err (context, 1, errno, "open %s",
545 server_context->log_context.log_file);
547 signal_fd = make_signal_socket (context);
548 listen_fd = make_listen_socket (context);
550 signal (SIGPIPE, SIG_IGN);
556 struct timeval to = {30, 0};
559 if (signal_fd >= FD_SETSIZE || listen_fd >= FD_SETSIZE)
560 krb5_errx (context, 1, "fd too large");
563 FD_SET(signal_fd, &readset);
564 max_fd = max(max_fd, signal_fd);
565 FD_SET(listen_fd, &readset);
566 max_fd = max(max_fd, listen_fd);
568 for (p = slaves; p != NULL; p = p->next) {
569 FD_SET(p->fd, &readset);
570 max_fd = max(max_fd, p->fd);
573 ret = select (max_fd + 1,
574 &readset, NULL, NULL, &to);
579 krb5_err (context, 1, errno, "select");
583 old_version = current_version;
584 kadm5_log_get_version_fd (log_fd, ¤t_version);
586 if (current_version > old_version)
587 for (p = slaves; p != NULL; p = p->next)
588 send_diffs (context, p, log_fd, database, current_version);
591 if (ret && FD_ISSET(signal_fd, &readset)) {
592 struct sockaddr_un peer_addr;
593 socklen_t peer_len = sizeof(peer_addr);
595 if(recvfrom(signal_fd, (void *)&vers, sizeof(vers), 0,
596 (struct sockaddr *)&peer_addr, &peer_len) < 0) {
597 krb5_warn (context, errno, "recvfrom");
601 old_version = current_version;
602 kadm5_log_get_version_fd (log_fd, ¤t_version);
603 for (p = slaves; p != NULL; p = p->next)
604 send_diffs (context, p, log_fd, database, current_version);
607 for(p = slaves; ret && p != NULL; p = p->next)
608 if (FD_ISSET(p->fd, &readset)) {
610 if(process_msg (context, p, log_fd, database, current_version))
614 if (ret && FD_ISSET(listen_fd, &readset)) {
615 add_slave (context, keytab, &slaves, listen_fd);
618 write_stats(context, slaves, current_version);