manager.c

			/* Add trailing \0 */
			output[x+1] = '\0';
			/* Move remaining data back to the front */
			memmove(s->inbuf, s->inbuf + x + 1, s->inlen - x);
			s->inlen -= (x + 1);
			return 1;
		}
	} 
	if (s->inlen >= sizeof(s->inbuf) - 1) {
		ast_log(LOG_WARNING, "Dumping long line with no return from %s: %s\n", inet_ntoa(s->sin.sin_addr), s->inbuf);
		s->inlen = 0;
	}
	fds[0].fd = s->fd;
	fds[0].events = POLLIN;
	res = poll(fds, 1, -1);
	if (res < 0) {
		ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
	} else if (res > 0) {
		ast_mutex_lock(&s->lock);
		res = read(s->fd, s->inbuf + s->inlen, sizeof(s->inbuf) - 1 - s->inlen);
		ast_mutex_unlock(&s->lock);
		if (res < 1)
			return -1;
	}
	s->inlen += res;
	s->inbuf[s->inlen] = '\0';
	return 0;
}

static void *session_do(void *data)
{
	struct mansession *s = data;
	struct message m;
	int res;
	
	ast_mutex_lock(&s->lock);
	ast_cli(s->fd, "Asterisk Call Manager/1.0\r\n");
	ast_mutex_unlock(&s->lock);
	memset(&m, 0, sizeof(&m));
	for (;;) {
		res = get_input(s, m.headers[m.hdrcount]);
		if (res > 0) {
			/* Strip trailing \r\n */
			if (strlen(m.headers[m.hdrcount]) < 2)
				continue;
			m.headers[m.hdrcount][strlen(m.headers[m.hdrcount]) - 2] = '\0';
			if (ast_strlen_zero(m.headers[m.hdrcount])) {
				if (process_message(s, &m))
					break;
				memset(&m, 0, sizeof(&m));
			} else if (m.hdrcount < MAX_HEADERS - 1)
				m.hdrcount++;
		} else if (res < 0)
			break;
	}
	if (s->authenticated) {
		if (option_verbose > 1) 
			ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
		ast_log(LOG_EVENT, "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
	} else {
		if (option_verbose > 1)
			ast_verbose(VERBOSE_PREFIX_2 "Connect attempt from '%s' unable to authenticate\n", inet_ntoa(s->sin.sin_addr));
		ast_log(LOG_EVENT, "Failed attempt from %s\n", inet_ntoa(s->sin.sin_addr));
	}
	destroy_session(s);
	return NULL;
}

static void *accept_thread(void *ignore)
{
	int as;
	struct sockaddr_in sin;
	int sinlen;
	struct mansession *s;
	struct protoent *p;
	int arg = 1;
	int flags;
	pthread_attr_t attr;

	pthread_attr_init(&attr);
	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

	for (;;) {
		sinlen = sizeof(sin);
		as = accept(asock, (struct sockaddr *)&sin, &sinlen);
		if (as < 0) {
			ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
			continue;
		}
		p = getprotobyname("tcp");
		if( p ) {
			if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
				ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
			}
		}
		s = malloc(sizeof(struct mansession));
		if (!s) {
			ast_log(LOG_WARNING, "Failed to allocate management session: %s\n", strerror(errno));
			continue;
		} 
		memset(s, 0, sizeof(struct mansession));
		memcpy(&s->sin, &sin, sizeof(sin));

		if(! block_sockets) {
			/* For safety, make sure socket is non-blocking */
			flags = fcntl(as, F_GETFL);
			fcntl(as, F_SETFL, flags | O_NONBLOCK);
		}
		ast_mutex_init(&s->lock);
		s->fd = as;
		s->send_events = 1;
		ast_mutex_lock(&sessionlock);
		s->next = sessions;
		sessions = s;
		ast_mutex_unlock(&sessionlock);
		if (pthread_create(&t, &attr, session_do, s))
			destroy_session(s);
	}
	pthread_attr_destroy(&attr);
	return NULL;
}

int manager_event(int category, char *event, char *fmt, ...)
{
	struct mansession *s;
	char tmp[4096];
	va_list ap;

	ast_mutex_lock(&sessionlock);
	s = sessions;
	while(s) {
		if (((s->readperm & category) == category) && s->send_events) {
			ast_mutex_lock(&s->lock);
			if (!s->blocking) {
				ast_cli(s->fd, "Event: %s\r\n", event);
				va_start(ap, fmt);
				vsnprintf(tmp, sizeof(tmp), fmt, ap);
				va_end(ap);
				ast_carefulwrite(s->fd,tmp,strlen(tmp),100);
				ast_cli(s->fd, "\r\n");
			}
			ast_mutex_unlock(&s->lock);
		}
		s = s->next;
	}
	ast_mutex_unlock(&sessionlock);
	return 0;
}

int ast_manager_unregister( char *action ) {
	struct manager_action *cur = first_action, *prev = first_action;

	ast_mutex_lock(&actionlock);
	while( cur ) { 		
		if (!strcasecmp(action, cur->action)) {
			prev->next = cur->next;
			free(cur);
			if (option_verbose > 1) 
				ast_verbose(VERBOSE_PREFIX_2 "Manager unregistered action %s\n", action);
			ast_mutex_unlock(&actionlock);
			return 0;
		}
		prev = cur;
		cur = cur->next;
	}
	ast_mutex_unlock(&actionlock);
	return 0;
}

static int manager_state_cb(char *context, char *exten, int state, void *data)
{
	/* Notify managers of change */
	manager_event(EVENT_FLAG_CALL, "ExtensionStatus", "Exten: %s\r\nContext: %s\r\nStatus: %d\r\n", exten, context, state);
	return 0;
}

static int ast_manager_register_struct(struct manager_action *act)
{
	struct manager_action *cur = first_action, *prev = NULL;
	int ret;

	ast_mutex_lock(&actionlock);
	while(cur) { /* Walk the list of actions */
		ret = strcasecmp(cur->action, act->action);
		if (ret == 0) {
			ast_log(LOG_WARNING, "Manager: Action '%s' already registered\n", act->action);
			ast_mutex_unlock(&actionlock);
			return -1;
		} else if (ret > 0) {
			/* Insert these alphabetically */
			if (prev) {
				act->next = prev->next;
				prev->next = act;
			} else {
				act->next = first_action;
				first_action = act;
			}
			break;
		}
		prev = cur; 
		cur = cur->next;
	}
	
	if (!cur) {
		if (prev)
			prev->next = act;
		else
			first_action = act;
		act->next = NULL;
	}

	if (option_verbose > 1) 
		ast_verbose(VERBOSE_PREFIX_2 "Manager registered action %s\n", act->action);
	ast_mutex_unlock(&actionlock);
	return 0;
}

int ast_manager_register2(char *action, int auth, int (*func)(struct mansession *s, struct message *m), char *synopsis, char *description)
{
	struct manager_action *cur;

	cur = malloc(sizeof(struct manager_action));
	if (!cur) {
		ast_log(LOG_WARNING, "Manager: out of memory trying to register action\n");
		ast_mutex_unlock(&actionlock);
		return -1;
	}
	cur->action = action;
	cur->authority = auth;
	cur->func = func;
	cur->synopsis = synopsis;
	cur->description = description;
	cur->next = NULL;

	ast_manager_register_struct(cur);

	return 0;
}

static int registered = 0;

int init_manager(void)
{
	struct ast_config *cfg;
	char *val;
	int oldportno = portno;
	static struct sockaddr_in ba;
	int x = 1;
	if (!registered) {
		/* Register default actions */
		ast_manager_register2("Ping", 0, action_ping, "Ping", mandescr_ping);
		ast_manager_register( "Events", 0, action_events, "Contol Event Flow" );
		ast_manager_register( "Logoff", 0, action_logoff, "Logoff Manager" );
		ast_manager_register( "Hangup", EVENT_FLAG_CALL, action_hangup, "Hangup Channel" );
		ast_manager_register( "Status", EVENT_FLAG_CALL, action_status, "Status" );
		ast_manager_register( "Setvar", EVENT_FLAG_CALL, action_setvar, "Set Channel Variable" );
		ast_manager_register( "Getvar", EVENT_FLAG_CALL, action_getvar, "Gets a Channel Variable" );
		ast_manager_register( "Redirect", EVENT_FLAG_CALL, action_redirect, "Redirect" );
		ast_manager_register2("Originate", EVENT_FLAG_CALL, action_originate, "Originate Call", mandescr_originate);
		ast_manager_register( "MailboxStatus", EVENT_FLAG_CALL, action_mailboxstatus, "Check Mailbox" );
		ast_manager_register( "Command", EVENT_FLAG_COMMAND, action_command, "Execute Command" );
		ast_manager_register( "ExtensionState", EVENT_FLAG_CALL, action_extensionstate, "Check Extension Status" );
		ast_manager_register( "AbsoluteTimeout", EVENT_FLAG_CALL, action_timeout, "Set Absolute Timeout" );
		ast_manager_register( "MailboxCount", EVENT_FLAG_CALL, action_mailboxcount, "Check Mailbox Message Count" );
		ast_manager_register2("ListCommands", 0, action_listcommands, "List available manager commands", mandescr_listcommands);

		ast_cli_register(&show_mancmd_cli);
		ast_cli_register(&show_mancmds_cli);
		ast_cli_register(&show_manconn_cli);
		ast_extension_state_add(NULL, NULL, manager_state_cb, NULL);
		registered = 1;
	}
	portno = DEFAULT_MANAGER_PORT;
	cfg = ast_load("manager.conf");
	if (!cfg) {
		ast_log(LOG_NOTICE, "Unable to open management configuration manager.conf.  Call management disabled.\n");
		return 0;
	}
	memset(&ba, 0, sizeof(ba));
	val = ast_variable_retrieve(cfg, "general", "enabled");
	if (val)
		enabled = ast_true(val);

	val = ast_variable_retrieve(cfg, "general", "block-sockets");
	if(val)
		block_sockets = ast_true(val);

	if ((val = ast_variable_retrieve(cfg, "general", "port"))) {
		if (sscanf(val, "%d", &portno) != 1) {
			ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
			portno = DEFAULT_MANAGER_PORT;
		}
	} else if ((val = ast_variable_retrieve(cfg, "general", "portno"))) {
		if (sscanf(val, "%d", &portno) != 1) {
			ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
			portno = DEFAULT_MANAGER_PORT;
		}
		ast_log(LOG_NOTICE, "Use of portno in manager.conf deprecated.  Please use 'port=%s' instead.\n", val);
	}
	
	ba.sin_family = AF_INET;
	ba.sin_port = htons(portno);
	memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
	
	if ((val = ast_variable_retrieve(cfg, "general", "bindaddr"))) {
		if (!inet_aton(val, &ba.sin_addr)) { 
			ast_log(LOG_WARNING, "Invalid address '%s' specified, using 0.0.0.0\n", val);
			memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
		}
	}
	
	if ((asock > -1) && ((portno != oldportno) || !enabled)) {
#if 0
		/* Can't be done yet */
		close(asock);
		asock = -1;
#else
		ast_log(LOG_WARNING, "Unable to change management port / enabled\n");
#endif
	}
	ast_destroy(cfg);
	
	/* If not enabled, do nothing */
	if (!enabled) {
		return 0;
	}
	if (asock < 0) {
		asock = socket(AF_INET, SOCK_STREAM, 0);
		if (asock < 0) {
			ast_log(LOG_WARNING, "Unable to create socket: %s\n", strerror(errno));
			return -1;
		}
		setsockopt(asock, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
		if (bind(asock, (struct sockaddr *)&ba, sizeof(ba))) {
			ast_log(LOG_WARNING, "Unable to bind socket: %s\n", strerror(errno));
			close(asock);
			asock = -1;
			return -1;
		}
		if (listen(asock, 2)) {
			ast_log(LOG_WARNING, "Unable to listen on socket: %s\n", strerror(errno));
			close(asock);
			asock = -1;
			return -1;
		}
		if (option_verbose)
			ast_verbose("Asterisk Management interface listening on port %d\n", portno);
		pthread_create(&t, NULL, accept_thread, NULL);
	}
	return 0;
}

int reload_manager(void)
{
	manager_event(EVENT_FLAG_SYSTEM, "Reload", "Message: Reload Requested\r\n");
	return init_manager();
}