Check for already registered manager command. Bug #836
[asterisk/asterisk.git] / manager.c
1 /*
2  * Asterisk -- A telephony toolkit for Linux.
3  *
4  * Channel Management and more
5  * 
6  * Copyright (C) 1999, Mark Spencer
7  *
8  * Mark Spencer <markster@linux-support.net>
9  *
10  * This program is free software, distributed under the terms of
11  * the GNU General Public License
12  */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <pthread.h>
17 #include <string.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <netdb.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <netinet/tcp.h>
24 #include <arpa/inet.h>
25 #include <signal.h>
26 #include <errno.h>
27 #include <unistd.h>
28 #include <asterisk/channel.h>
29 #include <asterisk/file.h>
30 #include <asterisk/manager.h>
31 #include <asterisk/config.h>
32 #include <asterisk/lock.h>
33 #include <asterisk/logger.h>
34 #include <asterisk/options.h>
35 #include <asterisk/cli.h>
36 #include <asterisk/app.h>
37 #include <asterisk/pbx.h>
38 #include <asterisk/md5.h>
39 #include <asterisk/acl.h>
40
41 static int enabled = 0;
42 static int portno = DEFAULT_MANAGER_PORT;
43 static int asock = -1;
44 static pthread_t t;
45 static ast_mutex_t sessionlock = AST_MUTEX_INITIALIZER;
46
47 static struct permalias {
48         int num;
49         char *label;
50 } perms[] = {
51         { EVENT_FLAG_SYSTEM, "system" },
52         { EVENT_FLAG_CALL, "call" },
53         { EVENT_FLAG_LOG, "log" },
54         { EVENT_FLAG_VERBOSE, "verbose" },
55         { EVENT_FLAG_COMMAND, "command" },
56         { EVENT_FLAG_AGENT, "agent" },
57         { EVENT_FLAG_USER, "user" },
58         { -1, "all" },
59 };
60
61 static struct mansession *sessions = NULL;
62 static struct manager_action *first_action = NULL;
63 static ast_mutex_t actionlock = AST_MUTEX_INITIALIZER;
64
65 static int handle_showmancmds(int fd, int argc, char *argv[])
66 {
67         struct manager_action *cur = first_action;
68
69         ast_mutex_lock(&actionlock);
70         while(cur) { /* Walk the list of actions */
71                 ast_cli(fd, "\t%s  %s\r\n",cur->action, cur->synopsis);
72                 cur = cur->next;
73         }
74
75         ast_mutex_unlock(&actionlock);
76         return RESULT_SUCCESS;
77 }
78
79 static int handle_showmanconn(int fd, int argc, char *argv[])
80 {
81         struct mansession *s;
82
83         ast_mutex_lock(&sessionlock);
84         s = sessions;
85         ast_cli(fd, "  Username\tIP Address\n");
86         while(s) {
87                 ast_cli(fd, "  %s\t\t%s\r\n",s->username, inet_ntoa(s->sin.sin_addr));
88                 s = s->next;
89         }
90
91         ast_mutex_unlock(&sessionlock);
92         return RESULT_SUCCESS;
93 }
94
95 static char showmancmds_help[] = 
96 "Usage: show manager commands\n"
97 "       Prints a listing of all the available manager commands.\n";
98
99 static char showmanconn_help[] = 
100 "Usage: show manager connected\n"
101 "       Prints a listing of the users that are connected to the\n"
102 "manager interface.\n";
103
104 static struct ast_cli_entry show_mancmds_cli =
105         { { "show", "manager", "commands", NULL },
106         handle_showmancmds, "Show manager commands", showmancmds_help };
107
108 static struct ast_cli_entry show_manconn_cli =
109         { { "show", "manager", "connected", NULL },
110         handle_showmanconn, "Show connected manager users", showmanconn_help };
111
112 static void destroy_session(struct mansession *s)
113 {
114         struct mansession *cur, *prev = NULL;
115         ast_mutex_lock(&sessionlock);
116         cur = sessions;
117         while(cur) {
118                 if (cur == s)
119                         break;
120                 prev = cur;
121                 cur = cur->next;
122         }
123         if (cur) {
124                 if (prev)
125                         prev->next = cur->next;
126                 else
127                         sessions = cur->next;
128                 if (s->fd > -1)
129                         close(s->fd);
130                 free(s);
131         } else
132                 ast_log(LOG_WARNING, "Trying to delete non-existant session %p?\n", s);
133         ast_mutex_unlock(&sessionlock);
134         
135 }
136
137 char *astman_get_header(struct message *m, char *var)
138 {
139         char cmp[80];
140         int x;
141         snprintf(cmp, sizeof(cmp), "%s: ", var);
142         for (x=0;x<m->hdrcount;x++)
143                 if (!strncasecmp(cmp, m->headers[x], strlen(cmp)))
144                         return m->headers[x] + strlen(cmp);
145         return "";
146 }
147
148 void astman_send_error(struct mansession *s, struct message *m, char *error)
149 {
150         char *id = astman_get_header(m,"ActionID");
151         ast_mutex_lock(&s->lock);
152         ast_cli(s->fd, "Response: Error\r\n");
153         if (id && strlen(id))
154                 ast_cli(s->fd, "ActionID: %s\r\n",id);
155         ast_cli(s->fd, "Message: %s\r\n\r\n", error);
156         ast_mutex_unlock(&s->lock);
157 }
158
159 void astman_send_response(struct mansession *s, struct message *m, char *resp, char *msg)
160 {
161         char *id = astman_get_header(m,"ActionID");
162         ast_mutex_lock(&s->lock);
163         ast_cli(s->fd, "Response: %s\r\n", resp);
164         if (id && strlen(id))
165                 ast_cli(s->fd, "ActionID: %s\r\n",id);
166         if (msg)
167                 ast_cli(s->fd, "Message: %s\r\n\r\n", msg);
168         else
169                 ast_cli(s->fd, "\r\n");
170         ast_mutex_unlock(&s->lock);
171 }
172
173 void astman_send_ack(struct mansession *s, struct message *m, char *msg)
174 {
175         astman_send_response(s, m, "Success", msg);
176 }
177
178 static int get_perm(char *instr)
179 {
180         char tmp[256];
181         char *c;
182         int x;
183         int ret = 0;
184         char *stringp=NULL;
185         if (!instr)
186                 return 0;
187         strncpy(tmp, instr, sizeof(tmp) - 1);
188         stringp=tmp;
189         c = strsep(&stringp, ",");
190         while(c) {
191                 for (x=0;x<sizeof(perms) / sizeof(perms[0]);x++) {
192                         if (!strcasecmp(perms[x].label, c)) 
193                                 ret |= perms[x].num;
194                 }
195                 c = strsep(&stringp, ",");
196         }
197         return ret;
198 }
199
200 static int authenticate(struct mansession *s, struct message *m)
201 {
202         struct ast_config *cfg;
203         char *cat;
204         char *user = astman_get_header(m, "Username");
205         char *pass = astman_get_header(m, "Secret");
206         char *authtype = astman_get_header(m, "AuthType");
207         char *key = astman_get_header(m, "Key");
208
209         cfg = ast_load("manager.conf");
210         if (!cfg)
211                 return -1;
212         cat = ast_category_browse(cfg, NULL);
213         while(cat) {
214                 if (strcasecmp(cat, "general")) {
215                         /* This is a user */
216                         if (!strcasecmp(cat, user)) {
217                                 struct ast_variable *v;
218                                 struct ast_ha *ha = NULL;
219                                 char *password = NULL;
220                                 v = ast_variable_browse(cfg, cat);
221                                 while (v) {
222                                         if (!strcasecmp(v->name, "secret")) {
223                                                 password = v->value;
224                                         } else if (!strcasecmp(v->name, "permit") ||
225                                                    !strcasecmp(v->name, "deny")) {
226                                                         ha = ast_append_ha(v->name, v->value, ha);
227                                         }                                               
228                                         v = v->next;
229                                 }
230                                 if (ha && !ast_apply_ha(ha, &(s->sin))) {
231                                         ast_log(LOG_NOTICE, "%s failed to pass IP ACL as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
232                                         ast_free_ha(ha);
233                                         ast_destroy(cfg);
234                                         return -1;
235                                 } else if (ha)
236                                         ast_free_ha(ha);
237                                 if (!strcasecmp(authtype, "MD5")) {
238                                         if (key && strlen(key) && s->challenge) {
239                                                 int x;
240                                                 int len=0;
241                                                 char md5key[256] = "";
242                                                 struct MD5Context md5;
243                                                 unsigned char digest[16];
244                                                 MD5Init(&md5);
245                                                 MD5Update(&md5, s->challenge, strlen(s->challenge));
246                                                 MD5Update(&md5, password, strlen(password));
247                                                 MD5Final(digest, &md5);
248                                                 for (x=0;x<16;x++)
249                                                         len += sprintf(md5key + len, "%2.2x", digest[x]);
250                                                 if (!strcmp(md5key, key))
251                                                         break;
252                                                 else {
253                                                         ast_destroy(cfg);
254                                                         return -1;
255                                                 }
256                                         }
257                                 } else if (password && !strcasecmp(password, pass)) {
258                                         break;
259                                 } else {
260                                         ast_log(LOG_NOTICE, "%s failed to authenticate as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
261                                         ast_destroy(cfg);
262                                         return -1;
263                                 }       
264                         }
265                 }
266                 cat = ast_category_browse(cfg, cat);
267         }
268         if (cat) {
269                 strncpy(s->username, cat, sizeof(s->username) - 1);
270                 s->readperm = get_perm(ast_variable_retrieve(cfg, cat, "read"));
271                 s->writeperm = get_perm(ast_variable_retrieve(cfg, cat, "write"));
272                 ast_destroy(cfg);
273                 return 0;
274         }
275         ast_log(LOG_NOTICE, "%s tried to authenticate with non-existant user '%s'\n", inet_ntoa(s->sin.sin_addr), user);
276         ast_destroy(cfg);
277         return -1;
278 }
279
280 static int action_ping(struct mansession *s, struct message *m)
281 {
282         astman_send_response(s, m, "Pong", NULL);
283         return 0;
284 }
285
286 static int action_logoff(struct mansession *s, struct message *m)
287 {
288         astman_send_response(s, m, "Goodbye", "Thanks for all the fish.");
289         return -1;
290 }
291
292 static int action_hangup(struct mansession *s, struct message *m)
293 {
294         struct ast_channel *c = NULL;
295         char *name = astman_get_header(m, "Channel");
296         if (!strlen(name)) {
297                 astman_send_error(s, m, "No channel specified");
298                 return 0;
299         }
300         c = ast_channel_walk(NULL);
301         while(c) {
302                 if (!strcasecmp(c->name, name)) {
303                         break;
304                 }
305                 c = ast_channel_walk(c);
306         }
307         if (!c) {
308                 astman_send_error(s, m, "No such channel");
309                 return 0;
310         }
311         ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
312         astman_send_ack(s, m, "Channel Hungup");
313         return 0;
314 }
315
316 static int action_status(struct mansession *s, struct message *m)
317 {
318         char *id = astman_get_header(m,"ActionID");
319         char idText[256] = "";
320         struct ast_channel *c;
321         char bridge[256];
322         astman_send_ack(s, m, "Channel status will follow");
323         c = ast_channel_walk(NULL);
324         if (id && strlen(id))
325                 snprintf(idText,256,"ActionID: %s\r\n",id);
326         while(c) {
327                 if (c->bridge)
328                         snprintf(bridge, sizeof(bridge), "Link: %s\r\n", c->bridge->name);
329                 else
330                         strcpy(bridge, "");
331                 if (c->pbx) {
332                         ast_cli(s->fd,
333                         "Event: Status\r\n"
334                         "Channel: %s\r\n"
335                         "CallerID: %s\r\n"
336                         "State: %s\r\n"
337                         "Context: %s\r\n"
338                         "Extension: %s\r\n"
339                         "Priority: %d\r\n"
340                         "%s"
341                         "Uniqueid: %s\r\n"
342                         "%s"
343                         "\r\n",
344                         c->name, c->callerid ? c->callerid : "<unknown>", 
345                         ast_state2str(c->_state), c->context,
346                         c->exten, c->priority, bridge, c->uniqueid, idText);
347                 } else {
348                         ast_cli(s->fd,
349                         "Event: Status\r\n"
350                         "Channel: %s\r\n"
351                         "CallerID: %s\r\n"
352                         "State: %s\r\n"
353                         "%s"
354                         "Uniqueid: %s\r\n"
355                         "%s"
356                         "\r\n",
357                         c->name, c->callerid ? c->callerid : "<unknown>", 
358                         ast_state2str(c->_state), bridge, c->uniqueid, idText);
359                 }
360                 c = ast_channel_walk(c);
361         }
362         return 0;
363 }
364
365 static int action_redirect(struct mansession *s, struct message *m)
366 {
367         char *name = astman_get_header(m, "Channel");
368         char *name2 = astman_get_header(m, "ExtraChannel");
369         char *exten = astman_get_header(m, "Exten");
370         char *context = astman_get_header(m, "Context");
371         char *priority = astman_get_header(m, "Priority");
372         int pi = 0;
373         int res;
374         if (!name || !strlen(name)) {
375                 astman_send_error(s, m, "Channel not specified");
376                 return 0;
377         }
378         if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
379                 astman_send_error(s, m, "Invalid priority\n");
380                 return 0;
381         }
382         res = ast_async_goto_by_name(name, context, exten, pi);
383         if (!res) {
384                 if (strlen(name2)) {
385                         res = ast_async_goto_by_name(name2, context, exten, pi);
386                         if (!res)
387                                 astman_send_ack(s, m, "Dual Redirect successful");
388                         else
389                                 astman_send_error(s, m, "Secondary redirect failed");
390                 } else
391                         astman_send_ack(s, m, "Redirect successful");
392         } else
393                 astman_send_error(s, m, "Redirect failed");
394         return 0;
395 }
396
397 static int action_command(struct mansession *s, struct message *m)
398 {
399         char *cmd = astman_get_header(m, "Command");
400         ast_mutex_lock(&s->lock);
401         s->blocking = 1;
402         ast_mutex_unlock(&s->lock);
403         ast_cli(s->fd, "Response: Follows\r\n");
404         /* FIXME: Wedge a ActionID response in here, waiting for later changes */
405         ast_cli_command(s->fd, cmd);
406         ast_cli(s->fd, "--END COMMAND--\r\n\r\n");
407         ast_mutex_lock(&s->lock);
408         s->blocking = 0;
409         ast_mutex_unlock(&s->lock);
410         return 0;
411 }
412
413 static int action_originate(struct mansession *s, struct message *m)
414 {
415         char *name = astman_get_header(m, "Channel");
416         char *exten = astman_get_header(m, "Exten");
417         char *context = astman_get_header(m, "Context");
418         char *priority = astman_get_header(m, "Priority");
419         char *timeout = astman_get_header(m, "Timeout");
420         char *callerid = astman_get_header(m, "CallerID");
421     char *variable = astman_get_header(m, "Variable");
422     char *account = astman_get_header(m, "Account");
423         char *app = astman_get_header(m, "Application");
424         char *appdata = astman_get_header(m, "Data");
425         char *tech, *data;
426         int pi = 0;
427         int res;
428         int to = 30000;
429         int reason = 0;
430         char tmp[256];
431         if (!name) {
432                 astman_send_error(s, m, "Channel not specified");
433                 return 0;
434         }
435         if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
436                 astman_send_error(s, m, "Invalid priority\n");
437                 return 0;
438         }
439         if (strlen(timeout) && (sscanf(timeout, "%d", &to) != 1)) {
440                 astman_send_error(s, m, "Invalid timeout\n");
441                 return 0;
442         }
443         strncpy(tmp, name, sizeof(tmp) - 1);
444         tech = tmp;
445         data = strchr(tmp, '/');
446         if (!data) {
447                 astman_send_error(s, m, "Invalid channel\n");
448                 return 0;
449         }
450         *data = '\0';
451         data++;
452         if (strlen(app)) {
453         res = ast_pbx_outgoing_app(tech, AST_FORMAT_SLINEAR, data, to, app, appdata, &reason, 1, strlen(callerid) ? callerid : NULL, variable, account);
454     } else {
455         res = ast_pbx_outgoing_exten(tech, AST_FORMAT_SLINEAR, data, to, context, exten, pi, &reason, 1, strlen(callerid) ? callerid : NULL, variable, account);
456         }   
457         if (!res)
458                 astman_send_ack(s, m, "Originate successfully queued");
459         else
460                 astman_send_error(s, m, "Originate failed");
461         return 0;
462 }
463
464 static int action_mailboxstatus(struct mansession *s, struct message *m)
465 {
466         char *mailbox = astman_get_header(m, "Mailbox");
467         char *id = astman_get_header(m,"ActionID");
468         char idText[256] = "";
469         if (!mailbox || !strlen(mailbox)) {
470                 astman_send_error(s, m, "Mailbox not specified");
471                 return 0;
472         }
473         if (id && strlen(id))
474                 snprintf(idText,256,"ActionID: %s\r\n",id);
475         ast_cli(s->fd, "Response: Success\r\n"
476                                    "%s"
477                                    "Message: Mailbox Status\r\n"
478                                    "Mailbox: %s\r\n"
479                                    "Waiting: %d\r\n\r\n", idText, mailbox, ast_app_has_voicemail(mailbox));
480         return 0;
481 }
482
483 static int action_mailboxcount(struct mansession *s, struct message *m)
484 {
485         char *mailbox = astman_get_header(m, "Mailbox");
486         char *id = astman_get_header(m,"ActionID");
487         char idText[256] = "";
488         int newmsgs = 0, oldmsgs = 0;
489         if (!mailbox || !strlen(mailbox)) {
490                 astman_send_error(s, m, "Mailbox not specified");
491                 return 0;
492         }
493         ast_app_messagecount(mailbox, &newmsgs, &oldmsgs);
494         if (id && strlen(id)) {
495                 snprintf(idText,256,"ActionID: %s\r\n",id);
496         }
497         ast_cli(s->fd, "Response: Success\r\n"
498                                    "%s"
499                                    "Message: Mailbox Message Count\r\n"
500                                    "Mailbox: %s\r\n"
501                                    "NewMessages: %d\r\n"
502                                    "OldMessages: %d\r\n" 
503                                    "\r\n",
504                                     idText,mailbox, newmsgs, oldmsgs);
505         return 0;
506 }
507
508 static int action_extensionstate(struct mansession *s, struct message *m)
509 {
510         char *exten = astman_get_header(m, "Exten");
511         char *context = astman_get_header(m, "Context");
512         char *id = astman_get_header(m,"ActionID");
513         char idText[256] = "";
514         char hint[256] = "";
515         int status;
516         if (!exten || !strlen(exten)) {
517                 astman_send_error(s, m, "Extension not specified");
518                 return 0;
519         }
520         if (!context || !strlen(context))
521                 context = "default";
522         status = ast_extension_state(NULL, context, exten);
523         ast_get_hint(hint, sizeof(hint) - 1, NULL, context, exten);
524         if (id && strlen(id)) {
525                 snprintf(idText,256,"ActionID: %s\r\n",id);
526         }
527         ast_cli(s->fd, "Response: Success\r\n"
528                                    "%s"
529                                    "Message: Extension Status\r\n"
530                                    "Exten: %s\r\n"
531                                    "Context: %s\r\n"
532                                    "Hint: %s\r\n"
533                                    "Status: %d\r\n\r\n",
534                                    idText,exten, context, hint, status);
535         return 0;
536 }
537
538 static int action_timeout(struct mansession *s, struct message *m)
539 {
540         struct ast_channel *c = NULL;
541         char *name = astman_get_header(m, "Channel");
542         int timeout = atoi(astman_get_header(m, "Timeout"));
543         if (!strlen(name)) {
544                 astman_send_error(s, m, "No channel specified");
545                 return 0;
546         }
547         if (!timeout) {
548                 astman_send_error(s, m, "No timeout specified");
549                 return 0;
550         }
551         c = ast_channel_walk(NULL);
552         while(c) {
553                 if (!strcasecmp(c->name, name)) {
554                         break;
555                 }
556                 c = ast_channel_walk(c);
557         }
558         if (!c) {
559                 astman_send_error(s, m, "No such channel");
560                 return 0;
561         }
562         ast_channel_setwhentohangup(c, timeout);
563         astman_send_ack(s, m, "Timeout Set");
564         return 0;
565 }
566
567 static int process_message(struct mansession *s, struct message *m)
568 {
569         char action[80];
570         struct manager_action *tmp = first_action;
571         char *id = astman_get_header(m,"ActionID");
572         char idText[256] = "";
573
574         strncpy(action, astman_get_header(m, "Action"), sizeof(action));
575         ast_log( LOG_DEBUG, "Manager received command '%s'\n", action );
576
577         if (!strlen(action)) {
578                 astman_send_error(s, m, "Missing action in request");
579                 return 0;
580         }
581         if (id && strlen(id)) {
582                 snprintf(idText,256,"ActionID: %s\r\n",id);
583         }
584         if (!s->authenticated) {
585                 if (!strcasecmp(action, "Challenge")) {
586                         char *authtype;
587                         authtype = astman_get_header(m, "AuthType");
588                         if (!strcasecmp(authtype, "MD5")) {
589                                 if (!s->challenge || !strlen(s->challenge)) {
590                                         ast_mutex_lock(&s->lock);
591                                         snprintf(s->challenge, sizeof(s->challenge), "%d", rand());
592                                         ast_mutex_unlock(&s->lock);
593                                 }
594                                 ast_cli(s->fd, "Response: Success\r\n"
595                                                 "%s"
596                                                 "Challenge: %s\r\n\r\n",
597                                                 idText,s->challenge);
598                                 return 0;
599                         } else {
600                                 astman_send_error(s, m, "Must specify AuthType");
601                                 return 0;
602                         }
603                 } else if (!strcasecmp(action, "Login")) {
604                         if (authenticate(s, m)) {
605                                 sleep(1);
606                                 astman_send_error(s, m, "Authentication failed");
607                                 return -1;
608                         } else {
609                                 s->authenticated = 1;
610                                 if (option_verbose > 1) 
611                                         ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
612                                 ast_log(LOG_EVENT, "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
613                                 astman_send_ack(s, m, "Authentication accepted");
614                         }
615                 } else if (!strcasecmp(action, "Logoff")) {
616                         astman_send_ack(s, m, "See ya");
617                         return -1;
618                 } else
619                         astman_send_error(s, m, "Authentication Required");
620         } else {
621                 while( tmp ) {          
622                         if (!strcasecmp(action, tmp->action)) {
623                                 if ((s->writeperm & tmp->authority) == tmp->authority) {
624                                         if (tmp->func(s, m))
625                                                 return -1;
626                                 } else {
627                                         astman_send_error(s, m, "Permission denied");
628                                 }
629                                 return 0;
630                         }
631                         tmp = tmp->next;
632                 }
633                 astman_send_error(s, m, "Invalid/unknown command");
634         }
635         return 0;
636 }
637
638 static int get_input(struct mansession *s, char *output)
639 {
640         /* output must have at least sizeof(s->inbuf) space */
641         int res;
642         int x;
643         fd_set fds;
644         for (x=1;x<s->inlen;x++) {
645                 if ((s->inbuf[x] == '\n') && (s->inbuf[x-1] == '\r')) {
646                         /* Copy output data up to and including \r\n */
647                         memcpy(output, s->inbuf, x + 1);
648                         /* Add trailing \0 */
649                         output[x+1] = '\0';
650                         /* Move remaining data back to the front */
651                         memmove(s->inbuf, s->inbuf + x + 1, s->inlen - x);
652                         s->inlen -= (x + 1);
653                         return 1;
654                 }
655         } 
656         if (s->inlen >= sizeof(s->inbuf) - 1) {
657                 ast_log(LOG_WARNING, "Dumping long line with no return from %s: %s\n", inet_ntoa(s->sin.sin_addr), s->inbuf);
658                 s->inlen = 0;
659         }
660         FD_ZERO(&fds);
661         FD_SET(s->fd, &fds);
662         res = ast_select(s->fd + 1, &fds, NULL, NULL, NULL);
663         if (res < 0) {
664                 ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
665         } else if (res > 0) {
666                 ast_mutex_lock(&s->lock);
667                 res = read(s->fd, s->inbuf + s->inlen, sizeof(s->inbuf) - 1 - s->inlen);
668                 ast_mutex_unlock(&s->lock);
669                 if (res < 1)
670                         return -1;
671         }
672         s->inlen += res;
673         s->inbuf[s->inlen] = '\0';
674         return 0;
675 }
676
677 static void *session_do(void *data)
678 {
679         struct mansession *s = data;
680         struct message m;
681         int res;
682         
683         ast_mutex_lock(&s->lock);
684         ast_cli(s->fd, "Asterisk Call Manager/1.0\r\n");
685         ast_mutex_unlock(&s->lock);
686         memset(&m, 0, sizeof(&m));
687         for (;;) {
688                 res = get_input(s, m.headers[m.hdrcount]);
689                 if (res > 0) {
690                         /* Strip trailing \r\n */
691                         if (strlen(m.headers[m.hdrcount]) < 2)
692                                 continue;
693                         m.headers[m.hdrcount][strlen(m.headers[m.hdrcount]) - 2] = '\0';
694                         if (!strlen(m.headers[m.hdrcount])) {
695                                 if (process_message(s, &m))
696                                         break;
697                                 memset(&m, 0, sizeof(&m));
698                         } else if (m.hdrcount < MAX_HEADERS - 1)
699                                 m.hdrcount++;
700                 } else if (res < 0)
701                         break;
702         }
703         if (s->authenticated) {
704                 if (option_verbose > 1) 
705                         ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
706                 ast_log(LOG_EVENT, "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
707         } else {
708                 if (option_verbose > 1)
709                         ast_verbose(VERBOSE_PREFIX_2 "Connect attempt from '%s' unable to authenticate\n", inet_ntoa(s->sin.sin_addr));
710                 ast_log(LOG_EVENT, "Failed attempt from %s\n", inet_ntoa(s->sin.sin_addr));
711         }
712         destroy_session(s);
713         return NULL;
714 }
715
716 static void *accept_thread(void *ignore)
717 {
718         int as;
719         struct sockaddr_in sin;
720         int sinlen;
721         struct mansession *s;
722         struct protoent *p;
723         int arg = 1;
724         pthread_attr_t attr;
725
726         pthread_attr_init(&attr);
727         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
728
729         for (;;) {
730                 sinlen = sizeof(sin);
731                 as = accept(asock, (struct sockaddr *)&sin, &sinlen);
732                 if (as < 0) {
733                         ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
734                         continue;
735                 }
736                 p = getprotobyname("tcp");
737                 if( p ) {
738                         if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
739                                 ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
740                         }
741                 }
742                 s = malloc(sizeof(struct mansession));
743                 if (!s) {
744                         ast_log(LOG_WARNING, "Failed to allocate management session: %s\n", strerror(errno));
745                         continue;
746                 } 
747                 memset(s, 0, sizeof(struct mansession));
748                 memcpy(&s->sin, &sin, sizeof(sin));
749                 ast_mutex_init(&s->lock);
750                 s->fd = as;
751                 ast_mutex_lock(&sessionlock);
752                 s->next = sessions;
753                 sessions = s;
754                 ast_mutex_unlock(&sessionlock);
755                 if (pthread_create(&t, &attr, session_do, s))
756                         destroy_session(s);
757         }
758         pthread_attr_destroy(&attr);
759         return NULL;
760 }
761
762 int manager_event(int category, char *event, char *fmt, ...)
763 {
764         struct mansession *s;
765         char tmp[4096];
766         va_list ap;
767
768         ast_mutex_lock(&sessionlock);
769         s = sessions;
770         while(s) {
771                 if ((s->readperm & category) == category) {
772                         ast_mutex_lock(&s->lock);
773                         if (!s->blocking) {
774                                 ast_cli(s->fd, "Event: %s\r\n", event);
775                                 va_start(ap, fmt);
776                                 vsnprintf(tmp, sizeof(tmp), fmt, ap);
777                                 va_end(ap);
778                                 write(s->fd, tmp, strlen(tmp));
779                                 ast_cli(s->fd, "\r\n");
780                         }
781                         ast_mutex_unlock(&s->lock);
782                 }
783                 s = s->next;
784         }
785         ast_mutex_unlock(&sessionlock);
786         return 0;
787 }
788
789 int ast_manager_unregister( char *action ) {
790         struct manager_action *cur = first_action, *prev = first_action;
791
792         ast_mutex_lock(&actionlock);
793         while( cur ) {          
794                 if (!strcasecmp(action, cur->action)) {
795                         prev->next = cur->next;
796                         free(cur);
797                         if (option_verbose > 1) 
798                                 ast_verbose(VERBOSE_PREFIX_2 "Manager unregistered action %s\n", action);
799                         ast_mutex_unlock(&actionlock);
800                         return 0;
801                 }
802                 prev = cur;
803                 cur = cur->next;
804         }
805         ast_mutex_unlock(&actionlock);
806         return 0;
807 }
808
809 static int manager_state_cb(char *context, char *exten, int state, void *data)
810 {
811         /* Notify managers of change */
812         manager_event(EVENT_FLAG_CALL, "ExtensionStatus", "Exten: %s\r\nContext: %s\r\nStatus: %d\r\n", exten, context, state);
813         return 0;
814 }
815
816 int ast_manager_register( char *action, int auth, 
817         int (*func)(struct mansession *s, struct message *m), char *synopsis)
818 {
819         struct manager_action *cur = first_action, *prev = NULL;
820
821         ast_mutex_lock(&actionlock);
822         while(cur) { /* Walk the list of actions */
823                 if (!strcasecmp(cur->action, action)) {
824                         ast_log(LOG_WARNING, "Manager: Action '%s' already registered\n", action);
825                         ast_mutex_unlock(&actionlock);
826                         return -1;
827                 }
828                 prev = cur; 
829                 cur = cur->next;
830         }
831         cur = malloc( sizeof(struct manager_action) );
832         if( !cur ) {
833                 ast_log(LOG_WARNING, "Manager: out of memory trying to register action\n");
834                 ast_mutex_unlock(&actionlock);
835                 return -1;
836         }
837         strncpy( cur->action, action, 255 );
838         cur->authority = auth;
839         cur->func = func;
840         cur->synopsis = synopsis;
841         cur->next = NULL;
842
843         if( prev ) prev->next = cur;
844         else first_action = cur;
845
846         if (option_verbose > 1) 
847                 ast_verbose(VERBOSE_PREFIX_2 "Manager registered action %s\n", action);
848         ast_mutex_unlock(&actionlock);
849         return 0;
850 }
851
852 static int registered = 0;
853
854 int init_manager(void)
855 {
856         struct ast_config *cfg;
857         char *val;
858         int oldportno = portno;
859         static struct sockaddr_in ba;
860         int x = 1;
861         if (!registered) {
862                 /* Register default actions */
863                 ast_manager_register( "Ping", 0, action_ping, "Ping" );
864                 ast_manager_register( "Logoff", 0, action_logoff, "Logoff Manager" );
865                 ast_manager_register( "Hangup", EVENT_FLAG_CALL, action_hangup, "Hangup Channel" );
866                 ast_manager_register( "Status", EVENT_FLAG_CALL, action_status, "Status" );
867                 ast_manager_register( "Redirect", EVENT_FLAG_CALL, action_redirect, "Redirect" );
868                 ast_manager_register( "Originate", EVENT_FLAG_CALL, action_originate, "Originate Call" );
869                 ast_manager_register( "MailboxStatus", EVENT_FLAG_CALL, action_mailboxstatus, "Check Mailbox" );
870                 ast_manager_register( "Command", EVENT_FLAG_COMMAND, action_command, "Execute Command" );
871                 ast_manager_register( "ExtensionState", EVENT_FLAG_CALL, action_extensionstate, "Check Extension Status" );
872                 ast_manager_register( "AbsoluteTimeout", EVENT_FLAG_CALL, action_timeout, "Set Absolute Timeout" );
873                 ast_manager_register( "MailboxCount", EVENT_FLAG_CALL, action_mailboxcount, "Check Mailbox Message Count" );
874
875                 ast_cli_register(&show_mancmds_cli);
876                 ast_cli_register(&show_manconn_cli);
877                 ast_extension_state_add(NULL, NULL, manager_state_cb, NULL);
878                 registered = 1;
879         }
880         portno = DEFAULT_MANAGER_PORT;
881         cfg = ast_load("manager.conf");
882         if (!cfg) {
883                 ast_log(LOG_NOTICE, "Unable to open management configuration manager.conf.  Call management disabled.\n");
884                 return 0;
885         }
886         memset(&ba, 0, sizeof(ba));
887         val = ast_variable_retrieve(cfg, "general", "enabled");
888         if (val)
889                 enabled = ast_true(val);
890
891         if ((val = ast_variable_retrieve(cfg, "general", "portno"))) {
892                 if (sscanf(val, "%d", &portno) != 1) {
893                         ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
894                         portno = DEFAULT_MANAGER_PORT;
895                 }
896         }
897         
898         ba.sin_family = AF_INET;
899         ba.sin_port = htons(portno);
900         memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
901         
902         if ((val = ast_variable_retrieve(cfg, "general", "bindaddr"))) {
903                 if (!inet_aton(val, &ba.sin_addr)) { 
904                         ast_log(LOG_WARNING, "Invalid address '%s' specified, using 0.0.0.0\n", val);
905                         memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
906                 }
907         }
908
909         if ((asock > -1) && ((portno != oldportno) || !enabled)) {
910 #if 0
911                 /* Can't be done yet */
912                 close(asock);
913                 asock = -1;
914 #else
915                 ast_log(LOG_WARNING, "Unable to change management port / enabled\n");
916 #endif
917         }
918         ast_destroy(cfg);
919         
920         /* If not enabled, do nothing */
921         if (!enabled) {
922                 return 0;
923         }
924         if (asock < 0) {
925                 asock = socket(AF_INET, SOCK_STREAM, 0);
926                 if (asock < 0) {
927                         ast_log(LOG_WARNING, "Unable to create socket: %s\n", strerror(errno));
928                         return -1;
929                 }
930                 setsockopt(asock, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
931                 if (bind(asock, (struct sockaddr *)&ba, sizeof(ba))) {
932                         ast_log(LOG_WARNING, "Unable to bind socket: %s\n", strerror(errno));
933                         close(asock);
934                         asock = -1;
935                         return -1;
936                 }
937                 if (listen(asock, 2)) {
938                         ast_log(LOG_WARNING, "Unable to listen on socket: %s\n", strerror(errno));
939                         close(asock);
940                         asock = -1;
941                         return -1;
942                 }
943                 if (option_verbose)
944                         ast_verbose("Asterisk Management interface listening on port %d\n", portno);
945                 pthread_create(&t, NULL, accept_thread, NULL);
946         }
947         return 0;
948 }
949
950 int reload_manager(void)
951 {
952         manager_event(EVENT_FLAG_SYSTEM, "Reload", "Message: Reload Requested\r\n");
953         return init_manager();
954 }