Version 0.2.0 from FTP

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@526 65c4cc65-6c06-0410-ace0-fbb531ad65f3

manager.c

@@ -0,0 +1,619 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Channel Management and more
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+#include <asterisk/channel.h>
+#include <asterisk/file.h>
+#include <asterisk/manager.h>
+#include <asterisk/config.h>
+#include <asterisk/lock.h>
+#include <asterisk/logger.h>
+#include <asterisk/options.h>
+#include <asterisk/cli.h>
+#include <asterisk/pbx.h>
+
+static int enabled = 0;
+static int portno = DEFAULT_MANAGER_PORT;
+static int asock = -1;
+static pthread_t t;
+static pthread_mutex_t sessionlock = AST_MUTEX_INITIALIZER;
+
+static struct permalias {
+	int num;
+	char *label;
+} perms[] = {
+	{ EVENT_FLAG_SYSTEM, "system" },
+	{ EVENT_FLAG_CALL, "call" },
+	{ EVENT_FLAG_LOG, "log" },
+	{ EVENT_FLAG_VERBOSE, "verbose" },
+	{ EVENT_FLAG_COMMAND, "command" },
+	{ EVENT_FLAG_AGENT, "agent" },
+	{ -1, "all" },
+};
+
+#define MAX_HEADERS 80
+#define MAX_LEN 256
+
+static struct mansession {
+	pthread_t t;
+	pthread_mutex_t lock;
+	struct sockaddr_in sin;
+	int fd;
+	char username[80];
+	int authenticated;
+	int readperm;
+	int writeperm;
+	char inbuf[MAX_LEN];
+	int inlen;
+	
+	struct mansession *next;
+} *sessions = NULL;
+
+
+struct message {
+	int hdrcount;
+	char headers[MAX_HEADERS][MAX_LEN];
+};
+
+static void destroy_session(struct mansession *s)
+{
+	struct mansession *cur, *prev = NULL;
+	ast_pthread_mutex_lock(&sessionlock);
+	cur = sessions;
+	while(cur) {
+		if (cur == s)
+			break;
+		prev = cur;
+		cur = cur->next;
+	}
+	if (cur) {
+		if (prev)
+			prev->next = cur->next;
+		else
+			sessions = cur->next;
+		if (s->fd > -1)
+			close(s->fd);
+		free(s);
+	} else
+		ast_log(LOG_WARNING, "Trying to delete non-existant session %p?\n", s);
+	ast_pthread_mutex_unlock(&sessionlock);
+	
+}
+
+static char *get_header(struct message *m, char *var)
+{
+	char cmp[80];
+	int x;
+	snprintf(cmp, sizeof(cmp), "%s: ", var);
+	for (x=0;x<m->hdrcount;x++)
+		if (!strncasecmp(cmp, m->headers[x], strlen(cmp)))
+			return m->headers[x] + strlen(cmp);
+	return "";
+}
+
+static void send_error(struct mansession *s, char *error)
+{
+	ast_pthread_mutex_lock(&s->lock);
+	ast_cli(s->fd, "Response: Error\r\n");
+	ast_cli(s->fd, "Message: %s\r\n\r\n", error);
+	ast_pthread_mutex_unlock(&s->lock);
+}
+
+static void send_response(struct mansession *s, char *resp, char *msg)
+{
+	ast_pthread_mutex_lock(&s->lock);
+	ast_cli(s->fd, "Response: %s\r\n", resp);
+	if (msg)
+		ast_cli(s->fd, "Message: %s\r\n\r\n", msg);
+	else
+		ast_cli(s->fd, "\r\n");
+	ast_pthread_mutex_unlock(&s->lock);
+}
+
+static void send_ack(struct mansession *s, char *msg)
+{
+	send_response(s, "Success", msg);
+}
+
+static int get_perm(char *instr)
+{
+	char tmp[256];
+	char *c;
+	int x;
+	int ret = 0;
+	strncpy(tmp, instr, sizeof(tmp) - 1);
+	c = strtok(tmp, ",");
+	while(c) {
+		for (x=0;x<sizeof(perms) / sizeof(perms[0]);x++) {
+			if (!strcasecmp(perms[x].label, c)) 
+				ret |= perms[x].num;
+		}
+		c = strtok(NULL, ",");
+	}
+	return ret;
+}
+
+static int authenticate(struct mansession *s, struct message *m)
+{
+	struct ast_config *cfg;
+	char *cat;
+	char *user = get_header(m, "Username");
+	char *pass = get_header(m, "Secret");
+	cfg = ast_load("manager.conf");
+	if (!cfg)
+		return -1;
+	cat = ast_category_browse(cfg, NULL);
+	while(cat) {
+		if (strcasecmp(cat, "general")) {
+			/* This is a user */
+			if (!strcasecmp(cat, user)) {
+				char *password = ast_variable_retrieve(cfg, cat, "secret");
+				if (password && !strcasecmp(password, pass)) {
+					break;
+				} else {
+					ast_log(LOG_NOTICE, "%s failed to authenticate as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
+					ast_destroy(cfg);
+					return -1;
+				}	
+			}
+		}
+		cat = ast_category_browse(cfg, cat);
+	}
+	if (cat) {
+		strncpy(s->username, cat, sizeof(s->username) - 1);
+		s->readperm = get_perm(ast_variable_retrieve(cfg, cat, "read"));
+		s->writeperm = get_perm(ast_variable_retrieve(cfg, cat, "write"));
+		ast_destroy(cfg);
+		return 0;
+	}
+	ast_log(LOG_NOTICE, "%s tried to authenticate with non-existant user '%s'\n", inet_ntoa(s->sin.sin_addr), user);
+	ast_destroy(cfg);
+	return -1;
+}
+
+static int action_ping(struct mansession *s, struct message *m)
+{
+	send_response(s, "Pong", NULL);
+	return 0;
+}
+
+static int action_logoff(struct mansession *s, struct message *m)
+{
+	send_response(s, "Goodbye", "Thanks for all the fish.");
+	return -1;
+}
+
+static int action_hangup(struct mansession *s, struct message *m)
+{
+	struct ast_channel *c = NULL;
+	char *name = get_header(m, "Channel");
+	if (!strlen(name)) {
+		send_error(s, "No channel specified");
+		return 0;
+	}
+	c = ast_channel_walk(NULL);
+	while(c) {
+		if (!strcasecmp(c->name, name)) {
+			break;
+		}
+		c = ast_channel_walk(c);
+	}
+	if (!c) {
+		send_error(s, "No such channel");
+		return 0;
+	}
+	ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
+	send_ack(s, "Channel Hungup");
+	return 0;
+}
+
+static int action_status(struct mansession *s, struct message *m)
+{
+	struct ast_channel *c;
+	char bridge[256];
+	send_ack(s, "Channel status will follow");
+	c = ast_channel_walk(NULL);
+	while(c) {
+		if (c->bridge)
+			snprintf(bridge, sizeof(bridge), "Link: %s\r\n", c->bridge->name);
+		else
+			strcpy(bridge, "");
+		if (c->pbx) {
+			ast_cli(s->fd,
+			"Event: Status\r\n"
+			"Channel: %s\r\n"
+			"CallerID: %s\r\n"
+			"State: %s\r\n"
+			"Context: %s\r\n"
+			"Extension: %s\r\n"
+			"Priority: %d\r\n"
+			"%s"
+			"\r\n",
+			c->name, c->callerid ? c->callerid : "<unknown>", 
+			ast_state2str(c->_state), c->context,
+			c->exten, c->priority, bridge);
+		} else {
+			ast_cli(s->fd,
+			"Event: Status\r\n"
+			"Channel: %s\r\n"
+			"CallerID: %s\r\n"
+			"State: %s\r\n"
+			"%s"
+			"\r\n",
+			c->name, c->callerid ? c->callerid : "<unknown>", 
+			ast_state2str(c->_state), bridge);
+		}
+		c = ast_channel_walk(c);
+	}
+	return 0;
+}
+
+static int action_redirect(struct mansession *s, struct message *m)
+{
+	char *name = get_header(m, "Channel");
+	char *name2 = get_header(m, "ExtraChannel");
+	char *exten = get_header(m, "Exten");
+	char *context = get_header(m, "Context");
+	char *priority = get_header(m, "Priority");
+	int pi = 0;
+	int res;
+	if (!name || !strlen(name)) {
+		send_error(s, "Channel not specified");
+		return 0;
+	}
+	if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
+		send_error(s, "Invalid priority\n");
+		return 0;
+	}
+	res = ast_async_goto_by_name(name, context, exten, pi);
+	if (!res) {
+		if (strlen(name2)) {
+			res = ast_async_goto_by_name(name2, context, exten, pi);
+			if (!res)
+				send_ack(s, "Dual Redirect successful");
+			else
+				send_error(s, "Secondary redirect failed");
+		} else
+			send_ack(s, "Redirect successful");
+	} else
+		send_error(s, "Redirect failed");
+	return 0;
+}
+
+static int action_originate(struct mansession *s, struct message *m)
+{
+	char *name = get_header(m, "Channel");
+	char *exten = get_header(m, "Exten");
+	char *context = get_header(m, "Context");
+	char *priority = get_header(m, "Priority");
+	char *timeout = get_header(m, "Timeout");
+	char *tech, *data;
+	int pi = 0;
+	int res;
+	int to = 30000;
+	int reason = 0;
+	char tmp[256];
+	if (!name) {
+		send_error(s, "Channel not specified");
+		return 0;
+	}
+	if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
+		send_error(s, "Invalid priority\n");
+		return 0;
+	}
+	if (strlen(timeout) && (sscanf(priority, "%d", &to) != 1)) {
+		send_error(s, "Invalid timeout\n");
+		return 0;
+	}
+	strncpy(tmp, name, sizeof(tmp) - 1);
+	tech = tmp;
+	data = strchr(tmp, '/');
+	if (!data) {
+		send_error(s, "Invalid channel\n");
+		return 0;
+	}
+	*data = '\0';
+	data++;
+	res = ast_pbx_outgoing_exten(tech, AST_FORMAT_SLINEAR, data, to, context, exten, pi, &reason, 0);
+	if (!res)
+		send_ack(s, "Originate successfully queued");
+	else
+		send_error(s, "Originate failed");
+	return 0;
+}
+
+static struct action {
+	char *action;
+	int authority;
+	int (*func)(struct mansession *s, struct message *m);
+} actions[] = {
+	{ "Ping", 0, action_ping },
+	{ "Logoff", 0, action_logoff },
+	{ "Hangup", EVENT_FLAG_CALL, action_hangup },
+	{ "Status", EVENT_FLAG_CALL, action_status },
+	{ "Redirect", EVENT_FLAG_CALL, action_redirect },
+	{ "Originate", EVENT_FLAG_CALL, action_originate },
+};
+
+static int process_message(struct mansession *s, struct message *m)
+{
+	int x;
+	char action[80];
+	strncpy(action, get_header(m, "Action"), sizeof(action));
+	if (!strlen(action)) {
+		send_error(s, "Missing action in request");
+		return 0;
+	}
+	if (!s->authenticated) {
+		if (!strcasecmp(action, "Login")) {
+			if (authenticate(s, m)) {
+				sleep(1);
+				send_error(s, "Authentication failed");
+				return -1;
+			} else {
+				s->authenticated = 1;
+				if (option_verbose > 1) 
+					ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged on 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));
+				send_ack(s, "Authentication accepted");
+			}
+		} else 
+			send_error(s, "Authentication Required");
+	} else {
+		for (x=0;x<sizeof(actions) / sizeof(actions[0]);x++) {
+			if (!strcasecmp(action, actions[x].action)) {
+				if ((s->writeperm & actions[x].authority) == actions[x].authority) {
+					if (actions[x].func(s, m))
+						return -1;
+				} else {
+					send_error(s, "Permission denied");
+				}
+				break;
+			}
+		}
+		if (x >= sizeof(actions) / sizeof(actions[0]))
+			send_error(s, "Invalid/unknown command");
+	}
+#if 0
+	for (x=0;x<m->hdrcount;x++) {
+		printf("Header: %s\n", m->headers[x]);
+	}
+#endif	
+	return 0;
+}
+
+static int get_input(struct mansession *s, char *output)
+{
+	/* output must have at least sizeof(s->inbuf) space */
+	int res;
+	int x;
+	fd_set fds;
+	for (x=1;x<s->inlen;x++) {
+		if ((s->inbuf[x] == '\n') && (s->inbuf[x-1] == '\r')) {
+			/* Copy output data up to and including \r\n */
+			memcpy(output, s->inbuf, x + 1);
+			/* 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;
+	}
+	FD_ZERO(&fds);
+	FD_SET(s->fd, &fds);
+	res = select(s->fd + 1, &fds, NULL, NULL, NULL);
+	if (res < 0) {
+		ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
+	} else if (res > 0) {
+		ast_pthread_mutex_lock(&s->lock);
+		res = read(s->fd, s->inbuf + s->inlen, sizeof(s->inbuf) - 1 - s->inlen);
+		ast_pthread_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_pthread_mutex_lock(&s->lock);
+	ast_cli(s->fd, "Asterisk Call Manager/1.0\r\n");
+	ast_pthread_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 (!strlen(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;
+	for (;;) {
+		sinlen = sizeof(sin);
+		as = accept(asock, &sin, &sinlen);
+		if (as < 0) {
+			ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
+			continue;
+		}
+		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));
+		ast_pthread_mutex_init(&s->lock);
+		s->fd = as;
+		ast_pthread_mutex_lock(&sessionlock);
+		s->next = sessions;
+		sessions = s;
+		ast_pthread_mutex_unlock(&sessionlock);
+		if (pthread_create(&t, NULL, session_do, s))
+			destroy_session(s);
+	}
+		
+}
+
+int manager_event(int category, char *event, char *fmt, ...)
+{
+	struct mansession *s;
+	char tmp[4096];
+	va_list ap;
+
+	ast_pthread_mutex_lock(&sessionlock);
+	s = sessions;
+	while(s) {
+		if ((s->readperm & category) == category) {
+			ast_pthread_mutex_lock(&s->lock);
+			ast_cli(s->fd, "Event: %s\r\n", event);
+			va_start(ap, fmt);
+			vsnprintf(tmp, sizeof(tmp), fmt, ap);
+			va_end(ap);
+			write(s->fd, tmp, strlen(tmp));
+			ast_cli(s->fd, "\r\n");
+			ast_pthread_mutex_unlock(&s->lock);
+		}
+		s = s->next;
+	}
+	ast_pthread_mutex_unlock(&sessionlock);
+	return 0;
+}
+
+int init_manager(void)
+{
+	struct ast_config *cfg;
+	char *val;
+	int oldportno = portno;
+	static struct sockaddr_in ba;
+	int x = 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);
+
+	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;
+		}
+	}
+	
+	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
+	}
+	/* 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, &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);
+	}
+	ast_destroy(cfg);
+	return 0;
+}
+
+int reload_manager(void)
+{
+	return init_manager();
+}