[Freeswitch-svn] [commit] r10274 - freeswitch/trunk/src/mod/event_handlers/mod_erlang_event
Freeswitch SVN
andrew at freeswitch.org
Fri Nov 7 11:41:37 PST 2008
Author: andrew
Date: Thu Nov 6 16:03:30 2008
New Revision: 10274
Added:
freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/Makefile
freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/mod_erlang_event.c
Log:
Add mod_erlang_event to tree - a module that makes FreeSWITCH act like an erlang c-node.
Added: freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/Makefile
==============================================================================
--- (empty file)
+++ freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/Makefile Thu Nov 6 16:03:30 2008
@@ -0,0 +1,5 @@
+BASE=../../../..
+include $(BASE)/build/modmake.rules
+
+LOCAL_CFLAGS=-I/usr/local/lib/erlang/lib/erl_interface-3.5.8/include -L/usr/local/lib/erlang/lib/erl_interface-3.5.8/lib/ -D_REENTRANT
+LOCAL_LDFLAGS=-lei
Added: freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/mod_erlang_event.c
==============================================================================
--- (empty file)
+++ freeswitch/trunk/src/mod/event_handlers/mod_erlang_event/mod_erlang_event.c Thu Nov 6 16:03:30 2008
@@ -0,0 +1,1216 @@
+/*
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005/2006, Anthony Minessale II <anthmct at yahoo.com>
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ *
+ * The Initial Developer of the Original Code is
+ * Anthony Minessale II <anthmct at yahoo.com>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Anthony Minessale II <anthmct at yahoo.com>
+ * Andrew Thompson <andrew at hijacked.us>
+ *
+ *
+ * mod_erlang_event.c -- Erlang Event Handler derived from mod_event_socket
+ *
+ */
+#include <switch.h>
+
+#include <ei.h>
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_erlang_event_load);
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_erlang_event_shutdown);
+SWITCH_MODULE_RUNTIME_FUNCTION(mod_erlang_event_runtime);
+SWITCH_MODULE_DEFINITION(mod_erlang_event, mod_erlang_event_load, mod_erlang_event_shutdown, mod_erlang_event_runtime);
+
+static char *MARKER = "1";
+
+typedef enum {
+ LFLAG_AUTHED = (1 << 0),
+ LFLAG_RUNNING = (1 << 1),
+ LFLAG_EVENTS = (1 << 2),
+ LFLAG_LOG = (1 << 3),
+ LFLAG_FULL = (1 << 4),
+ LFLAG_MYEVENTS = (1 << 5),
+ LFLAG_SESSION = (1 << 6),
+ LFLAG_ASYNC = (1 << 7),
+ LFLAG_STATEFUL = (1 << 8)
+} event_flag_t;
+
+
+/* TODO - support multiple event handlers per erlang connection each with their own event filters? */
+struct event_handler {
+ erlang_pid pid;
+ switch_hash_t *event_hash;
+ struct event_handler *next;
+};
+
+struct listener {
+ int sockfd;
+ const struct ei_cnode_s *ec;
+ erlang_pid log_pid;
+ erlang_pid event_pid;
+ switch_queue_t *event_queue;
+ switch_queue_t *log_queue;
+ switch_memory_pool_t *pool;
+ switch_mutex_t *flag_mutex;
+ char *ebuf;
+ uint32_t flags;
+ switch_log_level_t level;
+ uint8_t event_list[SWITCH_EVENT_ALL + 1];
+ switch_hash_t *event_hash;
+ switch_thread_rwlock_t *rwlock;
+ switch_core_session_t *session;
+ int lost_events;
+ int lost_logs;
+ time_t last_flush;
+ uint32_t timeout;
+ uint32_t id;
+ char remote_ip[50];
+ /*switch_port_t remote_port;*/
+ struct listener *next;
+};
+
+typedef struct listener listener_t;
+
+static struct {
+ int sockfd;
+ switch_mutex_t *mutex;
+ switch_mutex_t *sock_mutex;
+ listener_t *listeners;
+ uint8_t ready;
+} listen_list;
+
+#define MAX_ACL 100
+
+static struct {
+ switch_mutex_t *mutex;
+ char *ip;
+ char *nodename;
+ switch_bool_t shortname;
+ uint16_t port;
+ char *cookie;
+ int done;
+ int threads;
+ char *acl[MAX_ACL];
+ uint32_t acl_count;
+ uint32_t id;
+} prefs;
+
+
+static void remove_listener(listener_t *listener);
+
+SWITCH_DECLARE_GLOBAL_STRING_FUNC(set_pref_ip, prefs.ip);
+SWITCH_DECLARE_GLOBAL_STRING_FUNC(set_pref_cookie, prefs.cookie);
+SWITCH_DECLARE_GLOBAL_STRING_FUNC(set_pref_nodename, prefs.nodename);
+
+static void *SWITCH_THREAD_FUNC listener_run(switch_thread_t *thread, void *obj);
+static void launch_listener_thread(listener_t *listener);
+
+static struct {
+ switch_event_node_t *node;
+} globals;
+
+
+static switch_status_t socket_logger(const switch_log_node_t *node, switch_log_level_t level)
+{
+ listener_t *l;
+
+ switch_mutex_lock(listen_list.mutex);
+ for (l = listen_list.listeners; l; l = l->next) {
+ if (switch_test_flag(l, LFLAG_LOG) && l->level >= node->level) {
+ char *data = strdup(node->data);
+ if (data) {
+ if (switch_queue_trypush(l->log_queue, data) == SWITCH_STATUS_SUCCESS) {
+ if (l->lost_logs) {
+ int ll = l->lost_logs;
+ switch_event_t *event;
+ l->lost_logs = 0;
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Lost %d log lines!\n", ll);
+ if (switch_event_create(&event, SWITCH_EVENT_TRAP) == SWITCH_STATUS_SUCCESS) {
+ switch_event_add_header(event, SWITCH_STACK_BOTTOM, "info", "lost %d log lines", ll);
+ switch_event_fire(&event);
+ }
+ }
+ } else {
+ switch_safe_free(data);
+ l->lost_logs++;
+ }
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Memory Error!\n");
+ }
+ }
+ }
+ switch_mutex_unlock(listen_list.mutex);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+
+static void expire_listener(listener_t **listener)
+{
+ void *pop;
+
+ switch_thread_rwlock_unlock((*listener)->rwlock);
+ switch_core_hash_destroy(&(*listener)->event_hash);
+ switch_core_destroy_memory_pool(&(*listener)->pool);
+
+ while (switch_queue_trypop((*listener)->event_queue, &pop) == SWITCH_STATUS_SUCCESS) {
+ switch_event_t *pevent = (switch_event_t *) pop;
+ switch_event_destroy(&pevent);
+ }
+
+ *listener = NULL;
+}
+
+
+static void ei_encode_switch_event(ei_x_buff *ebuf, switch_event_t *event)
+{
+ int i;
+ switch_event_header_t *hp;
+ for (i = 0, hp = event->headers; hp; hp = hp->next, i++) {
+ }
+
+ if (event->body)
+ i++;
+
+ ei_x_encode_tuple_header(ebuf, 2);
+ ei_x_encode_atom(ebuf, "event");
+ ei_x_encode_list_header(ebuf, i);
+
+ for (hp = event->headers; hp; hp = hp->next) {
+ ei_x_encode_tuple_header(ebuf, 2);
+ ei_x_encode_string(ebuf, hp->name);
+ ei_x_encode_string(ebuf, hp->value);
+ }
+
+ if (event->body) {
+ ei_x_encode_tuple_header(ebuf, 2);
+ ei_x_encode_string(ebuf, "body");
+ ei_x_encode_string(ebuf, event->body);
+ }
+
+ ei_x_encode_empty_list(ebuf);
+}
+
+
+static void event_handler(switch_event_t *event)
+{
+ switch_event_t *clone = NULL;
+ listener_t *l, *lp;
+
+ switch_assert(event != NULL);
+
+ if (!listen_list.ready) {
+ return;
+ }
+
+ lp = listen_list.listeners;
+
+ switch_mutex_lock(listen_list.mutex);
+ while(lp) {
+ uint8_t send = 0;
+
+ l = lp;
+ lp = lp->next;
+
+ if (!switch_test_flag(l, LFLAG_EVENTS)) {
+ continue;
+ }
+
+ if (switch_test_flag(l, LFLAG_STATEFUL) && l->timeout && switch_timestamp(NULL) - l->last_flush > l->timeout) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Stateful Listener %u has expired\n", l->id);
+ remove_listener(l);
+ expire_listener(&l);
+ continue;
+ }
+
+ if (l->event_list[SWITCH_EVENT_ALL]) {
+ send = 1;
+ } else if ((l->event_list[event->event_id])) {
+ if (event->event_id != SWITCH_EVENT_CUSTOM || !event->subclass_name || (switch_core_hash_find(l->event_hash, event->subclass_name))) {
+ send = 1;
+ }
+ }
+
+ if (send && switch_test_flag(l, LFLAG_MYEVENTS)) {
+ char *uuid = switch_event_get_header(event, "unique-id");
+ if (!uuid || strcmp(uuid, switch_core_session_get_uuid(l->session))) {
+ send = 0;
+ }
+ }
+
+ if (send) {
+ if (switch_event_dup(&clone, event) == SWITCH_STATUS_SUCCESS) {
+ if (switch_queue_trypush(l->event_queue, clone) == SWITCH_STATUS_SUCCESS) {
+ if (l->lost_events) {
+ int le = l->lost_events;
+ l->lost_events = 0;
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Lost %d events!\n", le);
+ clone = NULL;
+ if (switch_event_create(&clone, SWITCH_EVENT_TRAP) == SWITCH_STATUS_SUCCESS) {
+ switch_event_add_header(clone, SWITCH_STACK_BOTTOM, "info", "lost %d events", le);
+ switch_event_fire(&clone);
+ }
+ }
+ } else {
+ l->lost_events++;
+ switch_event_destroy(&clone);
+ }
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Memory Error!\n");
+ }
+ }
+
+ }
+ switch_mutex_unlock(listen_list.mutex);
+}
+
+
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_erlang_event_shutdown)
+{
+ listener_t *l;
+ int sanity = 0;
+
+ prefs.done = 1;
+
+ switch_log_unbind_logger(socket_logger);
+
+ close(listen_list.sockfd);
+
+ switch_yield(500);
+
+ while (prefs.threads) {
+ switch_yield(10000);
+ if (++sanity == 1000) {
+ break;
+ }
+ }
+ switch_event_unbind(&globals.node);
+
+ switch_mutex_lock(listen_list.mutex);
+ for (l = listen_list.listeners; l; l = l->next) {
+ close(l->sockfd);
+ }
+ switch_mutex_unlock(listen_list.mutex);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+
+static void add_listener(listener_t *listener)
+{
+ /* add me to the listeners so I get events */
+ switch_mutex_lock(listen_list.mutex);
+ listener->next = listen_list.listeners;
+ listen_list.listeners = listener;
+ switch_mutex_unlock(listen_list.mutex);
+}
+
+
+static void remove_listener(listener_t *listener)
+{
+ listener_t *l, *last = NULL;
+
+ switch_mutex_lock(listen_list.mutex);
+ for (l = listen_list.listeners; l; l = l->next) {
+ if (l == listener) {
+ if (last) {
+ last->next = l->next;
+ } else {
+ listen_list.listeners = l->next;
+ }
+ }
+ last = l;
+ }
+ switch_mutex_unlock(listen_list.mutex);
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_erlang_event_load)
+{
+ /* connect my internal structure to the blank pointer passed to me */
+ *module_interface = switch_loadable_module_create_module_interface(pool, modname);
+
+ /* indicate that the module should continue to be loaded */
+ return SWITCH_STATUS_SUCCESS;
+}
+
+
+struct api_command_struct {
+ char *api_cmd;
+ char *arg;
+ listener_t *listener;
+ char uuid_str[SWITCH_UUID_FORMATTED_LENGTH + 1];
+ uint8_t bg;
+ erlang_pid pid;
+ switch_memory_pool_t *pool;
+};
+
+
+static void *SWITCH_THREAD_FUNC api_exec(switch_thread_t *thread, void *obj)
+{
+ switch_bool_t r = SWITCH_TRUE;
+ struct api_command_struct *acs = (struct api_command_struct *) obj;
+ switch_stream_handle_t stream = { 0 };
+ char *reply, *freply = NULL;
+ switch_status_t status;
+
+ if (!acs) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Internal error.\n");
+ return NULL;
+ }
+
+ if (!acs->listener || !acs->listener->rwlock || switch_thread_rwlock_tryrdlock(acs->listener->rwlock) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error! cannot get read lock.\n");
+ goto done;
+ }
+
+
+ SWITCH_STANDARD_STREAM(stream);
+
+ if ((status = switch_api_execute(acs->api_cmd, acs->arg, NULL, &stream)) == SWITCH_STATUS_SUCCESS) {
+ reply = stream.data;
+ } else {
+ freply = switch_mprintf("%s: Command not found!\n", acs->api_cmd);
+ reply = freply;
+ r = SWITCH_FALSE;
+ }
+
+ if (!reply) {
+ reply = "Command returned no output!";
+ r = SWITCH_FALSE;
+ }
+
+ if (*reply == '-')
+ r = SWITCH_FALSE;
+
+ if (acs->bg) {
+ switch_event_t *event;
+
+ if (switch_event_create(&event, SWITCH_EVENT_BACKGROUND_JOB) == SWITCH_STATUS_SUCCESS) {
+ switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Job-UUID", acs->uuid_str);
+ switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Job-Command", acs->api_cmd);
+
+ ei_x_buff ebuf;
+ ei_x_new_with_version(&ebuf);
+
+ if (acs->arg) {
+ switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Job-Command-Arg", acs->arg);
+ }
+
+ switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Job-Successful", r ? "true" : "false");
+ switch_event_add_body(event, "%s", reply);
+
+ switch_event_fire(&event);
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Sending bgapi reply to %s\n", acs->pid.node);
+
+ ei_x_encode_tuple_header(&ebuf, 3);
+
+ if (r)
+ ei_x_encode_atom(&ebuf, "bgok");
+ else
+ ei_x_encode_atom(&ebuf, "bgerror");
+
+ ei_x_encode_string(&ebuf, acs->uuid_str);
+ ei_x_encode_string(&ebuf, reply);
+
+ ei_send(acs->listener->sockfd, &acs->pid, ebuf.buff, ebuf.index);
+
+ ei_x_free(&ebuf);
+ }
+ } else {
+ ei_x_buff rbuf;
+ ei_x_new_with_version(&rbuf);
+ ei_x_encode_tuple_header(&rbuf, 2);
+
+ if (!strlen(reply)) {
+ reply = "Command returned no output!";
+ r = SWITCH_FALSE;
+ }
+
+ if (r) {
+ ei_x_encode_atom(&rbuf, "ok");
+ } else {
+ ei_x_encode_atom(&rbuf, "error");
+ }
+
+ ei_x_encode_string(&rbuf, reply);
+
+ ei_send(acs->listener->sockfd, &acs->pid, rbuf.buff, rbuf.index);
+ ei_x_free(&rbuf);
+ }
+
+ switch_safe_free(stream.data);
+ switch_safe_free(freply);
+
+ if (acs->listener->rwlock) {
+ switch_thread_rwlock_unlock(acs->listener->rwlock);
+ }
+
+ done:
+ if (acs->bg) {
+ switch_memory_pool_t *pool = acs->pool;
+ acs = NULL;
+ switch_core_destroy_memory_pool(&pool);
+ pool = NULL;
+ }
+ return NULL;
+
+}
+
+
+static int handle_msg(listener_t *listener, erlang_msg *msg, ei_x_buff *buf, ei_x_buff *rbuf)
+{
+ int type, size, version, arity;
+ char tupletag[MAXATOMLEN];
+ char atom[MAXATOMLEN];
+
+ buf->index = 0;
+ ei_decode_version(buf->buff, &buf->index, &version);
+ ei_get_type(buf->buff, &buf->index, &type, &size);
+
+ switch(type) {
+ case ERL_SMALL_TUPLE_EXT :
+ case ERL_LARGE_TUPLE_EXT :
+ ei_decode_tuple_header(buf->buff, &buf->index, &arity);
+ if (ei_decode_atom(buf->buff, &buf->index, tupletag)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ if (!strncmp(tupletag, "set_log_level", MAXATOMLEN)) {
+ if (arity == 2) {
+ switch_log_level_t ltype = SWITCH_LOG_DEBUG;
+ char loglevelstr[MAXATOMLEN];
+ if (ei_decode_atom(buf->buff, &buf->index, loglevelstr)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+ ltype = switch_log_str2level(loglevelstr);
+
+ if (ltype && ltype != SWITCH_LOG_INVALID) {
+ listener->level = ltype;
+ } else {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+ } else {
+ /* tuple too long */
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+ } else if (!strncmp(tupletag, "event", MAXATOMLEN)) {
+ if (arity == 1) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ int custom = 0;
+ switch_event_types_t type;
+
+ if (!switch_test_flag(listener, LFLAG_EVENTS)) {
+ switch_set_flag_locked(listener, LFLAG_EVENTS);
+ }
+
+ for (int i = 1; i < arity; i++) {
+ if (!ei_decode_atom(buf->buff, &buf->index, atom)) {
+
+ if (custom) {
+ switch_core_hash_insert(listener->event_hash, atom, MARKER);
+ } else if (switch_name_event(atom, &type) == SWITCH_STATUS_SUCCESS) {
+ if (type == SWITCH_EVENT_ALL) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "ALL events enabled\n");
+ uint32_t x = 0;
+ for (x = 0; x < SWITCH_EVENT_ALL; x++) {
+ listener->event_list[x] = 1;
+ }
+ }
+ if (type <= SWITCH_EVENT_ALL) {
+ listener->event_list[type] = 1;
+ }
+ if (type == SWITCH_EVENT_CUSTOM) {
+ custom++;
+ }
+
+ }
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "enable event %s\n", atom);
+ }
+ }
+ } else if (!strncmp(tupletag, "nixevent", MAXATOMLEN)) {
+ if (arity == 1) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ int custom = 0;
+ switch_event_types_t type;
+
+ for (int i = 1; i < arity; i++) {
+ if (!ei_decode_atom(buf->buff, &buf->index, atom)) {
+
+ if (custom) {
+ switch_core_hash_delete(listener->event_hash, atom);
+ } else if (switch_name_event(atom, &type) == SWITCH_STATUS_SUCCESS) {
+ uint32_t x = 0;
+
+ if (type == SWITCH_EVENT_CUSTOM) {
+ custom++;
+ } else if (type == SWITCH_EVENT_ALL) {
+ for (x = 0; x <= SWITCH_EVENT_ALL; x++) {
+ listener->event_list[x] = 0;
+ }
+ } else {
+ if (listener->event_list[SWITCH_EVENT_ALL]) {
+ listener->event_list[SWITCH_EVENT_ALL] = 0;
+ for (x = 0; x < SWITCH_EVENT_ALL; x++) {
+ listener->event_list[x] = 1;
+ }
+ }
+ listener->event_list[type] = 0;
+ }
+ }
+ }
+ }
+ } else if (!strncmp(tupletag, "api", MAXATOMLEN)) {
+ if (arity < 3) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ char api_cmd[MAXATOMLEN];
+ char arg[1024];
+
+ if (ei_decode_atom(buf->buff, &buf->index, api_cmd)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ if (ei_decode_string(buf->buff, &buf->index, arg)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+ struct api_command_struct acs = { 0 };
+ acs.listener = listener;
+ acs.api_cmd = api_cmd;
+ acs.arg = arg;
+ acs.bg = 0;
+ acs.pid = msg->from;
+ api_exec(NULL, (void *) &acs);
+ goto noreply;
+
+ } else if (!strncmp(tupletag, "bgapi", MAXATOMLEN)) {
+ if (arity < 3) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ char api_cmd[MAXATOMLEN];
+ char arg[1024];
+
+ if (ei_decode_atom(buf->buff, &buf->index, api_cmd)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ if (ei_decode_string(buf->buff, &buf->index, arg)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ struct api_command_struct *acs = NULL;
+ switch_memory_pool_t *pool;
+ switch_thread_t *thread;
+ switch_threadattr_t *thd_attr = NULL;
+ switch_uuid_t uuid;
+
+ switch_core_new_memory_pool(&pool);
+ acs = switch_core_alloc(pool, sizeof(*acs));
+ switch_assert(acs);
+ acs->pool = pool;
+ acs->listener = listener;
+ acs->api_cmd = switch_core_strdup(acs->pool, api_cmd);
+ acs->arg = switch_core_strdup(acs->pool, arg);
+ acs->bg = 1;
+ acs->pid = msg->from;
+
+ switch_threadattr_create(&thd_attr, acs->pool);
+ switch_threadattr_detach_set(thd_attr, 1);
+ switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
+
+ switch_uuid_get(&uuid);
+ switch_uuid_format(acs->uuid_str, &uuid);
+ switch_thread_create(&thread, thd_attr, api_exec, acs, acs->pool);
+
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "ok");
+ ei_x_encode_string(rbuf, acs->uuid_str);
+
+ break;
+ } else {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "undef");
+ break;
+ }
+
+ ei_x_encode_atom(rbuf, "ok");
+ break;
+ case ERL_ATOM_EXT :
+ if(ei_decode_atom(buf->buff, &buf->index, atom)) {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "badarg");
+ break;
+ }
+
+ if (!strncmp(atom, "nolog", MAXATOMLEN)) {
+ if (switch_test_flag(listener, LFLAG_LOG)) {
+ switch_clear_flag_locked(listener, LFLAG_LOG);
+ }
+ } else if (!strncmp(atom, "register_log_handler", MAXATOMLEN)) {
+ listener->log_pid = msg->from;
+ listener->level = SWITCH_LOG_DEBUG;
+ switch_set_flag(listener, LFLAG_LOG);
+ } else if (!strncmp(atom, "register_event_handler", MAXATOMLEN)) {
+ listener->event_pid = msg->from;
+ if (!switch_test_flag(listener, LFLAG_EVENTS)) {
+ switch_set_flag_locked(listener, LFLAG_EVENTS);
+ }
+ } else if (!strncmp(atom, "noevents", MAXATOMLEN)) {
+ void *pop;
+ /*purge the event queue */
+ while (switch_queue_trypop(listener->event_queue, &pop) == SWITCH_STATUS_SUCCESS);
+
+ if (switch_test_flag(listener, LFLAG_EVENTS)) {
+ uint8_t x = 0;
+ switch_clear_flag_locked(listener, LFLAG_EVENTS);
+ for (x = 0; x <= SWITCH_EVENT_ALL; x++) {
+ listener->event_list[x] = 0;
+ }
+ /* wipe the hash */
+ switch_core_hash_destroy(&listener->event_hash);
+ switch_core_hash_init(&listener->event_hash, listener->pool);
+ } else {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "notlistening");
+ break;
+ }
+ } else if (!strncmp(atom, "exit", MAXATOMLEN)) {
+ switch_clear_flag_locked(listener, LFLAG_RUNNING);
+ ei_x_encode_atom(rbuf, "ok");
+ goto done;
+ } else {
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "undef");
+ break;
+ }
+
+ ei_x_encode_atom(rbuf, "ok");
+ break;
+ default :
+ /* some other kind of erlang term */
+ ei_x_encode_tuple_header(rbuf, 2);
+ ei_x_encode_atom(rbuf, "error");
+ ei_x_encode_atom(rbuf, "undef");
+ break;
+ }
+
+ ei_send(listener->sockfd, &msg->from, rbuf->buff, rbuf->index);
+noreply:
+ return 0;
+
+done:
+ ei_send(listener->sockfd, &msg->from, rbuf->buff, rbuf->index);
+ return 1;
+}
+
+
+static void *SWITCH_THREAD_FUNC listener_run(switch_thread_t *thread, void *obj)
+{
+ listener_t *listener = (listener_t *) obj;
+ switch_core_session_t *session = NULL;
+ switch_channel_t *channel = NULL;
+ int status = 1;
+ void *pop;
+
+ switch_mutex_lock(listen_list.mutex);
+ prefs.threads++;
+ switch_mutex_unlock(listen_list.mutex);
+
+ switch_assert(listener != NULL);
+
+ if (prefs.acl_count && !switch_strlen_zero(listener->remote_ip)) {
+ uint32_t x = 0;
+ for (x = 0; x < prefs.acl_count; x++) {
+ if (!switch_check_network_list_ip(listener->remote_ip, prefs.acl[x])) {
+ erlang_msg msg;
+
+ ei_x_buff buf;
+ ei_x_new(&buf);
+
+ status = ei_xreceive_msg(listener->sockfd, &msg, &buf);
+ /* get data off the socket, just so we can get the pid on the other end */
+ if (status == ERL_MSG) {
+ /* if we got a message, return an ACL error. */
+ ei_x_buff rbuf;
+ ei_x_new_with_version(&rbuf);
+
+ ei_x_encode_tuple_header(&rbuf, 2);
+ ei_x_encode_atom(&rbuf, "error");
+ ei_x_encode_atom(&rbuf, "acldeny");
+
+ ei_send(listener->sockfd, &msg.from, rbuf.buff, rbuf.index);
+
+ ei_x_free(&rbuf);
+ }
+
+ ei_x_free(&buf);
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connection from %s denied by acl %s\n", listener->remote_ip, prefs.acl[x]);
+ goto done;
+ }
+ }
+ }
+
+ if ((session = listener->session)) {
+ channel = switch_core_session_get_channel(session);
+ switch_core_session_read_lock(session);
+ }
+
+ if (switch_strlen_zero(listener->remote_ip)) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connection Open\n");
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connection Open from %s\n", listener->remote_ip);/*, listener->remote_port);*/
+ }
+
+ switch_set_flag_locked(listener, LFLAG_RUNNING);
+ add_listener(listener);
+
+ while ((status >= 0 || erl_errno == ETIMEDOUT || erl_errno == EAGAIN) && !prefs.done) {
+ erlang_msg msg;
+
+ ei_x_buff buf;
+ ei_x_new(&buf);
+
+ ei_x_buff rbuf;
+ ei_x_new_with_version(&rbuf);
+
+ status = ei_xreceive_msg_tmo(listener->sockfd, &msg, &buf, 100);
+
+ switch(status) {
+ case ERL_TICK :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Tick\n");
+ break;
+ case ERL_MSG :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Message\n");
+ switch(msg.msgtype) {
+ case ERL_SEND :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_send\n");
+ if (handle_msg(listener, &msg, &buf, &rbuf)) {
+ goto done;
+ }
+ break;
+ case ERL_REG_SEND :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_reg_send\n");
+ if (handle_msg(listener, &msg, &buf, &rbuf)) {
+ goto done;
+ }
+ break;
+ case ERL_LINK :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_link\n");
+ break;
+ case ERL_UNLINK :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_unlink\n");
+ break;
+ case ERL_EXIT :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_exit\n");
+ break;
+ default :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "unexpected msg type %d\n", (int)(msg.msgtype));
+ break;
+ }
+ break;
+ case ERL_ERROR :
+ if (erl_errno != ETIMEDOUT && erl_errno != EAGAIN) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "erl_error\n");
+ }
+ break;
+ default :
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "unexpected status %d \n", status);
+ break;
+ }
+
+ ei_x_free(&buf);
+ ei_x_free(&rbuf);
+
+ /* send out any pending crap in the log queue */
+ if (switch_test_flag(listener, LFLAG_LOG)) {
+ if (switch_queue_trypop(listener->log_queue, &pop) == SWITCH_STATUS_SUCCESS) {
+ char *data = (char *) pop;
+
+ if (data) {
+ ei_x_buff lbuf;
+ ei_x_new_with_version(&lbuf);
+ ei_x_encode_tuple_header(&lbuf, 2);
+ ei_x_encode_atom(&lbuf, "log");
+ ei_x_encode_string(&lbuf, data);
+ ei_send(listener->sockfd, &listener->log_pid, lbuf.buff, lbuf.index);
+ ei_x_free(&lbuf);
+ }
+ }
+ }
+
+ /* ditto with the event queue */
+ if (switch_test_flag(listener, LFLAG_EVENTS)) {
+ if (switch_queue_trypop(listener->event_queue, &pop) == SWITCH_STATUS_SUCCESS) {
+
+ switch_event_t *pevent = (switch_event_t *) pop;
+
+ ei_x_buff ebuf;
+ ei_x_new_with_version(&ebuf);
+
+ ei_encode_switch_event(&ebuf, pevent);
+
+ ei_send(listener->sockfd, &listener->event_pid, ebuf.buff, ebuf.index);
+
+ ei_x_free(&ebuf);
+ switch_event_destroy(&pevent);
+ }
+ }
+ }
+
+done:
+ remove_listener(listener);
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Session complete, waiting for children\n");
+
+ switch_thread_rwlock_wrlock(listener->rwlock);
+
+ if (listener->sockfd) {
+ close(listener->sockfd);
+ }
+
+ switch_thread_rwlock_unlock(listener->rwlock);
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connection Closed\n");
+ switch_core_hash_destroy(&listener->event_hash);
+
+ if (listener->session) {
+ switch_channel_clear_flag(switch_core_session_get_channel(listener->session), CF_CONTROLLED);
+ switch_clear_flag_locked(listener, LFLAG_SESSION);
+ switch_core_session_rwunlock(listener->session);
+ } else if (listener->pool) {
+ switch_memory_pool_t *pool = listener->pool;
+ switch_core_destroy_memory_pool(&pool);
+ }
+
+ switch_mutex_lock(listen_list.mutex);
+ prefs.threads--;
+ switch_mutex_unlock(listen_list.mutex);
+
+ return NULL;
+}
+
+
+/* Create a thread for the socket and launch it */
+static void launch_listener_thread(listener_t *listener)
+{
+ switch_thread_t *thread;
+ switch_threadattr_t *thd_attr = NULL;
+
+ switch_threadattr_create(&thd_attr, listener->pool);
+ switch_threadattr_detach_set(thd_attr, 1);
+ switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
+ switch_thread_create(&thread, thd_attr, listener_run, listener, listener->pool);
+}
+
+
+static int config(void)
+{
+ char *cf = "erlang_event.conf";
+ switch_xml_t cfg, xml, settings, param;
+
+ memset(&prefs, 0, sizeof(prefs));
+
+ prefs.shortname = SWITCH_TRUE;
+
+ if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Open of %s failed\n", cf);
+ } else {
+ if ((settings = switch_xml_child(cfg, "settings"))) {
+ for (param = switch_xml_child(settings, "param"); param; param = param->next) {
+ char *var = (char *) switch_xml_attr_soft(param, "name");
+ char *val = (char *) switch_xml_attr_soft(param, "value");
+
+ if (!strcmp(var, "listen-ip")) {
+ set_pref_ip(val);
+ } else if (!strcmp(var, "listen-port")) {
+ prefs.port = (uint16_t) atoi(val);
+ } else if (!strcmp(var, "cookie")) {
+ set_pref_cookie(val);
+ } else if (!strcmp(var, "nodename")) {
+ set_pref_nodename(val);
+ } else if (!strcmp(var, "shortname") && strcmp(val, "yes")) {
+ prefs.shortname = SWITCH_FALSE;
+ } else if (!strcasecmp(var, "apply-inbound-acl")) {
+ if (prefs.acl_count < MAX_ACL) {
+ prefs.acl[prefs.acl_count++] = strdup(val);
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Max acl records of %d reached\n", MAX_ACL);
+ }
+ }
+ }
+ }
+ switch_xml_free(xml);
+ }
+
+ if (switch_strlen_zero(prefs.ip)) {
+ set_pref_ip("127.0.0.1");
+ }
+
+ if (switch_strlen_zero(prefs.cookie)) {
+ set_pref_cookie("ClueCon");
+ }
+
+ if (!prefs.port) {
+ prefs.port = 8031;
+ }
+
+ if (!prefs.nodename) {
+ prefs.nodename = "freeswitch";
+ }
+
+ return 0;
+}
+
+
+SWITCH_MODULE_RUNTIME_FUNCTION(mod_erlang_event_runtime)
+{
+ switch_memory_pool_t *pool = NULL, *listener_pool = NULL;
+ switch_status_t rv;
+ listener_t *listener;
+ uint32_t x = 0;
+ struct ei_cnode_s ec;
+ ErlConnect conn;
+ struct sockaddr_in server_addr;
+ int on = 1;
+ int clientfd;
+
+ memset(&listen_list, 0, sizeof(listen_list));
+ config();
+
+ if (switch_core_new_memory_pool(&pool) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "OH OH no pool\n");
+ return SWITCH_STATUS_TERM;
+ }
+
+ switch_mutex_init(&listen_list.mutex, SWITCH_MUTEX_NESTED, pool);
+ switch_mutex_init(&listen_list.sock_mutex, SWITCH_MUTEX_NESTED, pool);
+
+ /* zero out the struct before we use it */
+ memset(&server_addr, 0, sizeof(server_addr));
+
+ /* convert the configured IP to network byte order, handing errors */
+ rv = inet_pton(AF_INET, prefs.ip, &server_addr.sin_addr.s_addr);
+ if (rv == 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not parse invalid ip address: %s\n", prefs.ip);
+ return SWITCH_STATUS_GENERR;
+ } else if (rv == -1) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error when parsing ip address %s : %s\n", prefs.ip, strerror(errno));
+ return SWITCH_STATUS_GENERR;
+ }
+
+ /* set the address family and port */
+ server_addr.sin_family = AF_INET;
+ server_addr.sin_port = htons(prefs.port);
+
+ /* do the socket setup ei is too lazy to do for us */
+ for (;;) {
+
+ if ((listen_list.sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to allocate socket on %s:%u\n", prefs.ip, prefs.port);
+ goto sock_fail;
+ }
+
+ if (setsockopt(listen_list.sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) != 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to enable SO_REUSEADDR for socket on %s:%u : %s\n", prefs.ip, prefs.port, strerror(errno));
+ goto sock_fail;
+ }
+
+ if (bind(listen_list.sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to bind to %s:%u\n", prefs.ip, prefs.port);
+ goto sock_fail;
+ }
+
+ if (listen(listen_list.sockfd, 5) < 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to listen on %s:%u\n", prefs.ip, prefs.port);
+ goto sock_fail;
+ }
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Socket up listening on %s:%u\n", prefs.ip, prefs.port);
+ break;
+ sock_fail:
+ switch_yield(100000);
+ }
+
+ struct hostent *nodehost = gethostbyaddr(&server_addr.sin_addr.s_addr, sizeof(server_addr.sin_addr.s_addr), AF_INET);
+
+ char *thishostname = nodehost->h_name;
+ char thisnodename[MAXNODELEN+1];
+
+ if (!strcmp(thishostname, "localhost"))
+ gethostname(thishostname, EI_MAXHOSTNAMELEN);
+
+ if (prefs.shortname) {
+ char *off;
+ if ((off = strchr(thishostname, '.'))) {
+ *off = '\0';
+ }
+ }
+
+ snprintf(thisnodename, MAXNODELEN+1, "%s@%s", prefs.nodename, thishostname);
+
+ /* init the ei stuff */
+ if (ei_connect_xinit(&ec, thishostname, prefs.nodename, thisnodename, (Erl_IpAddr)(&server_addr.sin_addr.s_addr), prefs.cookie, 0) < 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to init ei connection\n");
+ return SWITCH_STATUS_GENERR;
+ }
+
+ /* return value is -1 for error, a descriptor pointing to epmd otherwise */
+ if (ei_publish(&ec, prefs.port) == -1) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to publish port to empd\n");
+ return SWITCH_STATUS_GENERR;
+ }
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connected and published erlang cnode at %s port %u\n", thisnodename, prefs.port);
+
+ listen_list.ready = 1;
+
+ if (switch_event_bind_removable(modname, SWITCH_EVENT_ALL, SWITCH_EVENT_SUBCLASS_ANY, event_handler, NULL, &globals.node) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't bind!\n");
+ return SWITCH_STATUS_GENERR;
+ }
+
+ switch_log_bind_logger(socket_logger, SWITCH_LOG_DEBUG, SWITCH_FALSE);
+
+ for (;;) {
+ if (switch_core_new_memory_pool(&listener_pool) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "OH OH no pool\n");
+ goto fail;
+ }
+
+ /* zero out errno because ei_accept doesn't differentiate between a
+ * failed authentication or a socket failure, or a client version
+ * mismatch or a godzilla attack */
+ errno = 0;
+ if ((clientfd = ei_accept_tmo(&ec, listen_list.sockfd, &conn, 100)) == ERL_ERROR) {
+ if (prefs.done) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Shutting Down\n");
+ } else if (erl_errno == ETIMEDOUT) {
+ continue;
+ } else if (errno) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Socket Error %d %d\n", erl_errno, errno);
+ } else {
+ /* if errno didn't get set, assume nothing *too* horrible occured */
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE,
+ "Ignorable error in ei_accept - probable bad client version, bad cookie or bad nodename\n");
+ continue;
+ }
+ break;
+ }
+
+ if (!(listener = switch_core_alloc(listener_pool, sizeof(*listener)))) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Memory Error\n");
+ break;
+ }
+
+ switch_thread_rwlock_create(&listener->rwlock, listener_pool);
+ switch_queue_create(&listener->event_queue, SWITCH_CORE_QUEUE_LEN, listener_pool);
+ switch_queue_create(&listener->log_queue, SWITCH_CORE_QUEUE_LEN, listener_pool);
+
+ inet_ntop(AF_INET, conn.ipadr, listener->remote_ip, sizeof(listener->remote_ip));
+
+ listener->ec = &ec;
+ listener->sockfd = clientfd;
+ listener->pool = listener_pool;
+ listener_pool = NULL;
+ listener->level = SWITCH_LOG_DEBUG;
+ switch_mutex_init(&listener->flag_mutex, SWITCH_MUTEX_NESTED, listener->pool);
+ switch_core_hash_init(&listener->event_hash, listener->pool);
+
+ launch_listener_thread(listener);
+
+ }
+
+ close(listen_list.sockfd);
+
+ if (pool) {
+ switch_core_destroy_memory_pool(&pool);
+ }
+
+ if (listener_pool) {
+ switch_core_destroy_memory_pool(&listener_pool);
+ }
+
+
+ for (x = 0; x < prefs.acl_count; x++) {
+ switch_safe_free(prefs.acl[x]);
+ }
+
+ fail:
+ return SWITCH_STATUS_TERM;
+}
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4:
+ */
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