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ice.c
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/*! \file ice.c
* \author Lorenzo Miniero <[email protected]>
* \copyright GNU General Public License v3
* \brief ICE/STUN/TURN processing
* \details Implementation (based on libnice) of the ICE process. The
* code handles the whole ICE process, from the gathering of candidates
* to the final setup of a virtual channel RTP and RTCP can be transported
* on. Incoming RTP and RTCP packets from peers are relayed to the associated
* plugins by means of the incoming_rtp and incoming_rtcp callbacks. Packets
* to be sent to peers are relayed by peers invoking the relay_rtp and
* relay_rtcp gateway callbacks instead.
*
* \ingroup protocols
* \ref protocols
*/
#include <ifaddrs.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stun/usages/bind.h>
#include <nice/debug.h>
#include "janus.h"
#include "debug.h"
#include "ice.h"
#include "dtls.h"
#include "rtp.h"
#include "rtcp.h"
#include "apierror.h"
/* STUN server/port, if any */
static char *janus_stun_server = NULL;
static uint16_t janus_stun_port = 0;
char *janus_ice_get_stun_server(void) {
return janus_stun_server;
}
uint16_t janus_ice_get_stun_port(void) {
return janus_stun_port;
}
/* TURN server/portand credentials, if any */
static char *janus_turn_server = NULL;
static uint16_t janus_turn_port = 0;
static char *janus_turn_user = NULL, *janus_turn_pwd = NULL;
static NiceRelayType janus_turn_type = NICE_RELAY_TYPE_TURN_UDP;
char *janus_ice_get_turn_server(void) {
return janus_turn_server;
}
uint16_t janus_ice_get_turn_port(void) {
return janus_turn_port;
}
/* ICE-Lite status */
static gboolean janus_ice_lite_enabled;
gboolean janus_ice_is_ice_lite_enabled(void) {
return janus_ice_lite_enabled;
}
/* ICE-TCP support (only libnice >= 0.1.8, currently broken) */
static gboolean janus_ice_tcp_enabled;
gboolean janus_ice_is_ice_tcp_enabled(void) {
return janus_ice_tcp_enabled;
}
/* IPv6 support (still mostly WIP) */
static gboolean janus_ipv6_enabled;
gboolean janus_ice_is_ipv6_enabled(void) {
return janus_ipv6_enabled;
}
/* libnice debugging */
static gboolean janus_ice_debugging_enabled;
gboolean janus_ice_is_ice_debugging_enabled(void) {
return janus_ice_debugging_enabled;
}
void janus_ice_debugging_enable(void) {
JANUS_LOG(LOG_VERB, "Enabling libnice debugging...\n");
if(g_getenv("NICE_DEBUG") == NULL) {
JANUS_LOG(LOG_WARN, "No NICE_DEBUG environment variable set, setting maximum debug\n");
g_setenv("NICE_DEBUG", "all", TRUE);
}
if(g_getenv("G_MESSAGES_DEBUG") == NULL) {
JANUS_LOG(LOG_WARN, "No G_MESSAGES_DEBUG environment variable set, setting maximum debug\n");
g_setenv("G_MESSAGES_DEBUG", "all", TRUE);
}
JANUS_LOG(LOG_VERB, "Debugging NICE_DEBUG=%s G_MESSAGES_DEBUG=%s\n",
g_getenv("NICE_DEBUG"), g_getenv("G_MESSAGES_DEBUG"));
janus_ice_debugging_enabled = TRUE;
nice_debug_enable(strstr(g_getenv("NICE_DEBUG"), "all") || strstr(g_getenv("NICE_DEBUG"), "stun"));
}
void janus_ice_debugging_disable(void) {
JANUS_LOG(LOG_VERB, "Disabling libnice debugging...\n");
janus_ice_debugging_enabled = FALSE;
nice_debug_disable(TRUE);
}
/* Interface/IP ignore list */
GList *janus_ice_ignore_list = NULL;
janus_mutex ignore_list_mutex;
void janus_ice_ignore_interface(const char *ip) {
if(ip == NULL)
return;
/* Is this an IP or an interface? */
janus_mutex_lock(&ignore_list_mutex);
janus_ice_ignore_list = g_list_append(janus_ice_ignore_list, (gpointer)ip);
janus_mutex_unlock(&ignore_list_mutex);
}
gboolean janus_ice_is_ignored(const char *ip) {
if(ip == NULL || janus_ice_ignore_list == NULL)
return false;
janus_mutex_lock(&ignore_list_mutex);
GList *temp = janus_ice_ignore_list;
while(temp) {
const char *ignored = (const char *)temp->data;
if(ignored != NULL && strstr(ip, ignored)) {
janus_mutex_unlock(&ignore_list_mutex);
return true;
}
temp = temp->next;
}
janus_mutex_unlock(&ignore_list_mutex);
return false;
}
/* RTP/RTCP port range */
uint16_t rtp_range_min = 0;
uint16_t rtp_range_max = 0;
/* Helpers to demultiplex protocols */
gboolean janus_is_dtls(gchar *buf);
gboolean janus_is_dtls(gchar *buf) {
return ((*buf >= 20) && (*buf <= 64));
}
gboolean janus_is_rtp(gchar *buf);
gboolean janus_is_rtp(gchar *buf) {
rtp_header *header = (rtp_header *)buf;
return ((header->type < 64) || (header->type >= 96));
}
gboolean janus_is_rtcp(gchar *buf);
gboolean janus_is_rtcp(gchar *buf) {
rtp_header *header = (rtp_header *)buf;
return ((header->type >= 64) && (header->type < 96));
}
/* Maximum values for the NACK queue/retransmissions */
#define DEFAULT_MAX_NACK_QUEUE 300
/* Maximum ignore count after retransmission (100ms) */
#define MAX_NACK_IGNORE 100000
static uint max_nack_queue = DEFAULT_MAX_NACK_QUEUE;
void janus_set_max_nack_queue(uint mnq) {
max_nack_queue = mnq;
JANUS_LOG(LOG_VERB, "Setting max NACK queue to %d\n", max_nack_queue);
}
uint janus_get_max_nack_queue(void) {
return max_nack_queue;
}
static gint janus_nack_sort(gconstpointer n1, gconstpointer n2);
static gint janus_nack_sort(gconstpointer n1, gconstpointer n2) {
guint16 nack1, nack2;
nack1 = GPOINTER_TO_UINT(n1);
nack2 = GPOINTER_TO_UINT(n2);
/* TODO Take into account the sequence number rounding when it gets to 2^16 */
return (nack1 > nack2 ? +1 : nack1 == nack2 ? 0 : -1);
}
void janus_ice_notify_media(janus_ice_handle *handle, gboolean video, gboolean up);
void janus_ice_notify_media(janus_ice_handle *handle, gboolean video, gboolean up) {
if(handle == NULL)
return;
/* Prepare JSON event to notify user/application */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Notifying that we %s receiving %s\n",
handle->handle_id, up ? "are" : "are NOT", video ? "video" : "audio");
janus_session *session = (janus_session *)handle->session;
if(session == NULL)
return;
json_t *event = json_object();
json_object_set_new(event, "janus", json_string("media"));
json_object_set_new(event, "session_id", json_integer(session->session_id));
json_object_set_new(event, "sender", json_integer(handle->handle_id));
json_object_set_new(event, "type", json_string(video ? "video" : "audio"));
json_object_set_new(event, "receiving", json_string(up ? "true" : "false"));
/* Convert to a string */
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
/* Send the event */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Adding event to queue of messages...\n", handle->handle_id);
janus_http_event *notification = (janus_http_event *)calloc(1, sizeof(janus_http_event));
if(notification == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return;
}
notification->code = 200;
notification->payload = event_text;
notification->allocated = 1;
g_async_queue_push(session->messages, notification);
}
void janus_ice_notify_hangup(janus_ice_handle *handle, const char *reason) {
if(handle == NULL)
return;
/* Prepare JSON event to notify user/application */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Notifying WebRTC hangup\n", handle->handle_id);
janus_session *session = (janus_session *)handle->session;
if(session == NULL)
return;
json_t *event = json_object();
json_object_set_new(event, "janus", json_string("hangup"));
json_object_set_new(event, "session_id", json_integer(session->session_id));
json_object_set_new(event, "sender", json_integer(handle->handle_id));
if(reason != NULL)
json_object_set_new(event, "reason", json_string(reason));
/* Convert to a string */
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
/* Send the event */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Adding event to queue of messages...\n", handle->handle_id);
janus_http_event *notification = (janus_http_event *)calloc(1, sizeof(janus_http_event));
if(notification == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return;
}
notification->code = 200;
notification->payload = event_text;
notification->allocated = 1;
g_async_queue_push(session->messages, notification);
}
/* libnice initialization */
void janus_ice_init(gboolean ice_lite, gboolean ice_tcp, gboolean ipv6, uint16_t rtp_min_port, uint16_t rtp_max_port) {
janus_ice_lite_enabled = ice_lite;
janus_ice_tcp_enabled = ice_tcp;
janus_ipv6_enabled = ipv6;
JANUS_LOG(LOG_INFO, "Initializing ICE stuff (%s mode, ICE-TCP candidates %s, IPv6 support %s)\n",
janus_ice_lite_enabled ? "Lite" : "Full",
janus_ice_tcp_enabled ? "enabled" : "disabled",
janus_ipv6_enabled ? "enabled" : "disabled");
if(janus_ice_tcp_enabled) {
#ifndef HAVE_LIBNICE_TCP
JANUS_LOG(LOG_WARN, "libnice version < 0.1.8, disabling ICE-TCP support\n");
janus_ice_tcp_enabled = FALSE;
#else
if(!janus_ice_lite_enabled) {
JANUS_LOG(LOG_WARN, "ICE-TCP only works in libnice if you enable ICE Lite too: disabling ICE-TCP support\n");
janus_ice_tcp_enabled = FALSE;
}
#endif
}
/* Automatically enable libnice debugging based on debug_level */
if(log_level >= LOG_DBG) {
janus_ice_debugging_enable();
} else {
nice_debug_disable(TRUE);
}
/*! \note The RTP/RTCP port range configuration may be just a placeholder: for
* instance, libnice supports this since 0.1.0, but the 0.1.3 on Fedora fails
* when linking with an undefined reference to \c nice_agent_set_port_range
* so this is checked by the install.sh script in advance. */
rtp_range_min = rtp_min_port;
rtp_range_max = rtp_max_port;
if(rtp_range_max < rtp_range_min) {
JANUS_LOG(LOG_WARN, "Invalid ICE port range: %"SCNu16" > %"SCNu16"\n", rtp_range_min, rtp_range_max);
} else if(rtp_range_min > 0 || rtp_range_max > 0) {
#ifndef HAVE_PORTRANGE
JANUS_LOG(LOG_WARN, "nice_agent_set_port_range unavailable, port range disabled\n");
#else
JANUS_LOG(LOG_INFO, "ICE port range: %"SCNu16"-%"SCNu16"\n", rtp_range_min, rtp_range_max);
#endif
}
}
int janus_ice_set_stun_server(gchar *stun_server, uint16_t stun_port) {
if(stun_server == NULL)
return 0; /* No initialization needed */
if(stun_port == 0)
stun_port = 3478;
JANUS_LOG(LOG_INFO, "STUN server to use: %s:%u\n", stun_server, stun_port);
/* Resolve address to get an IP */
struct hostent *he = gethostbyname(stun_server);
if(he == NULL) {
JANUS_LOG(LOG_ERR, "Could not resolve %s...\n", stun_server);
return -1;
}
struct in_addr **addr_list = (struct in_addr **)he->h_addr_list;
if(addr_list[0] == NULL) {
JANUS_LOG(LOG_ERR, "Could not resolve %s...\n", stun_server);
return -1;
}
janus_stun_server = g_strdup(inet_ntoa(*addr_list[0]));
if(janus_stun_server == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return -1;
}
janus_stun_port = stun_port;
JANUS_LOG(LOG_VERB, " >> %s:%u\n", janus_stun_server, janus_stun_port);
/* Test the STUN server */
StunAgent stun;
stun_agent_init (&stun, STUN_ALL_KNOWN_ATTRIBUTES, STUN_COMPATIBILITY_RFC5389, 0);
StunMessage msg;
uint8_t buf[1500];
size_t len = stun_usage_bind_create(&stun, &msg, buf, 1500);
JANUS_LOG(LOG_INFO, "Testing STUN server: message is of %zu bytes\n", len);
int fd = socket(AF_INET, SOCK_DGRAM, 0);
int yes = 1; /* For setsockopt() SO_REUSEADDR */
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
struct sockaddr_in address, remote;
address.sin_family = AF_INET;
address.sin_port = 0;
address.sin_addr.s_addr = INADDR_ANY;
remote.sin_family = AF_INET;
remote.sin_port = htons(janus_stun_port);
remote.sin_addr.s_addr = inet_addr(janus_stun_server);
if(bind(fd, (struct sockaddr *)(&address), sizeof(struct sockaddr)) < 0) {
JANUS_LOG(LOG_FATAL, "Bind failed for STUN BINDING test\n");
return -1;
}
int bytes = sendto(fd, buf, len, 0, (struct sockaddr*)&remote, sizeof(remote));
if(bytes < 0) {
JANUS_LOG(LOG_FATAL, "Error sending STUN BINDING test\n");
return -1;
}
JANUS_LOG(LOG_VERB, " >> Sent %d bytes %s:%u, waiting for reply...\n", bytes, janus_stun_server, janus_stun_port);
struct timeval timeout;
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
timeout.tv_sec = 5; /* FIXME Don't wait forever */
timeout.tv_usec = 0;
select(fd+1, &readfds, NULL, NULL, &timeout);
if(!FD_ISSET(fd, &readfds)) {
JANUS_LOG(LOG_FATAL, "No response to our STUN BINDING test\n");
return -1;
}
socklen_t addrlen = sizeof(remote);
bytes = recvfrom(fd, buf, 1500, 0, (struct sockaddr*)&remote, &addrlen);
JANUS_LOG(LOG_VERB, " >> Got %d bytes...\n", bytes);
if(stun_agent_validate (&stun, &msg, buf, bytes, NULL, NULL) != STUN_VALIDATION_SUCCESS) {
JANUS_LOG(LOG_FATAL, "Failed to validate STUN BINDING response\n");
return -1;
}
StunClass class = stun_message_get_class(&msg);
StunMethod method = stun_message_get_method(&msg);
if(class != STUN_RESPONSE || method != STUN_BINDING) {
JANUS_LOG(LOG_FATAL, "Unexpected STUN response: %d/%d\n", class, method);
return -1;
}
StunMessageReturn ret = stun_message_find_xor_addr(&msg, STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS, (struct sockaddr *)&address, &addrlen);
JANUS_LOG(LOG_VERB, " >> XOR-MAPPED-ADDRESS: %d\n", ret);
if(ret == STUN_MESSAGE_RETURN_SUCCESS) {
JANUS_LOG(LOG_INFO, " >> Our public address is %s\n", inet_ntoa(address.sin_addr));
return 0;
}
ret = stun_message_find_addr(&msg, STUN_ATTRIBUTE_MAPPED_ADDRESS, (struct sockaddr *)&address, &addrlen);
JANUS_LOG(LOG_VERB, " >> MAPPED-ADDRESS: %d\n", ret);
if(ret == STUN_MESSAGE_RETURN_SUCCESS) {
JANUS_LOG(LOG_INFO, " >> Our public address is %s\n", inet_ntoa(address.sin_addr));
return 0;
}
return -1;
}
int janus_ice_set_turn_server(gchar *turn_server, uint16_t turn_port, gchar *turn_type, gchar *turn_user, gchar *turn_pwd) {
if(turn_server == NULL)
return 0; /* No initialization needed */
if(turn_type == NULL)
turn_type = (char *)"udp";
if(turn_port == 0)
turn_port = 3478;
JANUS_LOG(LOG_INFO, "TURN server to use: %s:%u (%s)\n", turn_server, turn_port, turn_type);
/* Resolve address to get an IP */
struct hostent *he = gethostbyname(turn_server);
if(he == NULL) {
JANUS_LOG(LOG_ERR, "Could not resolve %s...\n", turn_server);
return -1;
}
struct in_addr **addr_list = (struct in_addr **)he->h_addr_list;
if(addr_list[0] == NULL) {
JANUS_LOG(LOG_ERR, "Could not resolve %s...\n", turn_server);
return -1;
}
if(!strcasecmp(turn_type, "udp")) {
janus_turn_type = NICE_RELAY_TYPE_TURN_UDP;
} else if(!strcasecmp(turn_type, "tcp")) {
janus_turn_type = NICE_RELAY_TYPE_TURN_TCP;
} else if(!strcasecmp(turn_type, "tls")) {
janus_turn_type = NICE_RELAY_TYPE_TURN_TLS;
} else {
JANUS_LOG(LOG_ERR, "Unsupported relay type '%s'...\n", turn_type);
return -1;
}
janus_turn_server = g_strdup(inet_ntoa(*addr_list[0]));
if(janus_turn_server == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return -1;
}
janus_turn_port = turn_port;
JANUS_LOG(LOG_VERB, " >> %s:%u\n", janus_turn_server, janus_turn_port);
if(turn_user)
janus_turn_user = g_strdup(turn_user);
if(turn_pwd)
janus_turn_pwd = g_strdup(turn_pwd);
return 0;
}
/* ICE stuff */
static const gchar *janus_ice_state_name[] =
{
"disconnected",
"gathering",
"connecting",
"connected",
"ready",
"failed"
};
const gchar *janus_get_ice_state_name(gint state) {
if(state < 0 || state > 5)
return NULL;
return janus_ice_state_name[state];
}
/* Stats */
void janus_ice_stats_queue_free(gpointer data);
void janus_ice_stats_queue_free(gpointer data) {
janus_ice_stats_item *s = (janus_ice_stats_item *)data;
g_free(s);
}
void janus_ice_stats_reset(janus_ice_stats *stats) {
if(stats == NULL)
return;
stats->audio_bytes = 0;
if(stats->audio_bytes_lastsec)
g_list_free_full(stats->audio_bytes_lastsec, &janus_ice_stats_queue_free);
stats->audio_bytes_lastsec = NULL;
stats->audio_notified_lastsec = FALSE;
stats->audio_nacks = 0;
stats->video_bytes = 0;
if(stats->video_bytes_lastsec)
g_list_free_full(stats->video_bytes_lastsec, &janus_ice_stats_queue_free);
stats->video_bytes_lastsec = NULL;
stats->video_notified_lastsec = FALSE;
stats->video_nacks = 0;
stats->data_bytes = 0;
}
/* ICE Handles */
janus_ice_handle *janus_ice_handle_create(void *gateway_session) {
if(gateway_session == NULL)
return NULL;
janus_session *session = (janus_session *)gateway_session;
guint64 handle_id = 0;
while(handle_id == 0) {
handle_id = g_random_int();
if(janus_ice_handle_find(gateway_session, handle_id) != NULL) {
/* Handle ID already taken, try another one */
handle_id = 0;
}
}
JANUS_LOG(LOG_INFO, "Creating new handle in session %"SCNu64": %"SCNu64"\n", session->session_id, handle_id);
janus_ice_handle *handle = (janus_ice_handle *)calloc(1, sizeof(janus_ice_handle));
if(handle == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return NULL;
}
handle->session = gateway_session;
handle->handle_id = handle_id;
handle->app = NULL;
handle->app_handle = NULL;
janus_mutex_init(&handle->mutex);
/* Set up other stuff. */
janus_mutex_lock(&session->mutex);
if(session->ice_handles == NULL)
session->ice_handles = g_hash_table_new(NULL, NULL);
g_hash_table_insert(session->ice_handles, GUINT_TO_POINTER(handle_id), handle);
janus_mutex_unlock(&session->mutex);
return handle;
}
janus_ice_handle *janus_ice_handle_find(void *gateway_session, guint64 handle_id) {
if(gateway_session == NULL)
return NULL;
janus_session *session = (janus_session *)gateway_session;
janus_mutex_lock(&session->mutex);
janus_ice_handle *handle = session->ice_handles ? g_hash_table_lookup(session->ice_handles, GUINT_TO_POINTER(handle_id)) : NULL;
janus_mutex_unlock(&session->mutex);
return handle;
}
gint janus_ice_handle_attach_plugin(void *gateway_session, guint64 handle_id, janus_plugin *plugin) {
if(gateway_session == NULL)
return JANUS_ERROR_SESSION_NOT_FOUND;
if(plugin == NULL)
return JANUS_ERROR_PLUGIN_NOT_FOUND;
janus_session *session = (janus_session *)gateway_session;
janus_ice_handle *handle = janus_ice_handle_find(session, handle_id);
if(handle == NULL)
return JANUS_ERROR_HANDLE_NOT_FOUND;
janus_mutex_lock(&session->mutex);
if(handle->app != NULL) {
/* This handle is already attached to a plugin */
janus_mutex_unlock(&session->mutex);
return JANUS_ERROR_PLUGIN_ATTACH;
}
int error = 0;
janus_plugin_session *session_handle = calloc(1, sizeof(janus_plugin_session));
if(session_handle == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
janus_mutex_unlock(&session->mutex);
return JANUS_ERROR_UNKNOWN; /* FIXME Do we need something like "Internal Server Error"? */
}
session_handle->gateway_handle = handle;
session_handle->plugin_handle = NULL;
session_handle->stopped = 0;
plugin->create_session(session_handle, &error);
if(error) {
/* TODO Make error struct to pass verbose information */
janus_mutex_unlock(&session->mutex);
return error;
}
handle->app = plugin;
handle->app_handle = session_handle;
janus_mutex_unlock(&session->mutex);
return 0;
}
gint janus_ice_handle_destroy(void *gateway_session, guint64 handle_id) {
if(gateway_session == NULL)
return JANUS_ERROR_SESSION_NOT_FOUND;
janus_session *session = (janus_session *)gateway_session;
janus_ice_handle *handle = janus_ice_handle_find(session, handle_id);
if(handle == NULL)
return JANUS_ERROR_HANDLE_NOT_FOUND;
janus_mutex_lock(&session->mutex);
janus_plugin *plugin_t = (janus_plugin *)handle->app;
if(plugin_t == NULL) {
/* There was no plugin attached, probably something went wrong there */
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALERT);
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_STOP);
if(handle->iceloop)
g_main_loop_quit(handle->iceloop);
janus_mutex_unlock(&session->mutex);
return 0;
}
JANUS_LOG(LOG_INFO, "Detaching handle from %s\n", plugin_t->get_name());
/* TODO Actually detach handle... */
int error = 0;
handle->app_handle->stopped = 1; /* This is to tell the plugin to stop using this session: we'll get rid of it later */
plugin_t->destroy_session(handle->app_handle, &error);
/* Get rid of the handle now */
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALERT);
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_STOP);
if(handle->iceloop)
g_main_loop_quit(handle->iceloop);
/* Prepare JSON event to notify user/application */
json_t *event = json_object();
json_object_set_new(event, "janus", json_string("detached"));
json_object_set_new(event, "sender", json_integer(handle_id));
/* Convert to a string */
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
/* Send the event before we do anything */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Adding event to queue of messages...\n", handle_id);
janus_http_event *notification = (janus_http_event *)calloc(1, sizeof(janus_http_event));
if(notification) {
notification->code = 200;
notification->payload = event_text;
notification->allocated = 1;
g_async_queue_push(session->messages, notification);
}
janus_mutex_unlock(&session->mutex);
/* We only actually destroy the handle later */
JANUS_LOG(LOG_INFO, "Handle detached (%d), scheduling destruction\n", error);
return error;
}
void janus_ice_free(janus_ice_handle *handle) {
if(handle == NULL)
return;
janus_mutex_lock(&handle->mutex);
handle->session = NULL;
handle->app = NULL;
if(handle->app_handle != NULL) {
handle->app_handle->stopped = 1;
handle->app_handle->gateway_handle = NULL;
handle->app_handle->plugin_handle = NULL;
g_free(handle->app_handle);
handle->app_handle = NULL;
}
janus_mutex_unlock(&handle->mutex);
janus_ice_webrtc_free(handle);
JANUS_LOG(LOG_INFO, "[%"SCNu64"] Handle and related resources freed\n", handle->handle_id);
g_free(handle);
handle = NULL;
}
void janus_ice_webrtc_hangup(janus_ice_handle *handle) {
if(handle == NULL)
return;
janus_mutex_lock(&handle->mutex);
handle->icethread = NULL;
if(handle->streams != NULL) {
if(handle->audio_stream) {
janus_ice_stream *stream = handle->audio_stream;
if(stream->rtp_component)
janus_dtls_srtp_send_alert(stream->rtp_component->dtls);
if(stream->rtcp_component)
janus_dtls_srtp_send_alert(stream->rtcp_component->dtls);
}
if(handle->video_stream) {
janus_ice_stream *stream = handle->video_stream;
if(stream->rtp_component)
janus_dtls_srtp_send_alert(stream->rtp_component->dtls);
if(stream->rtcp_component)
janus_dtls_srtp_send_alert(stream->rtcp_component->dtls);
}
if(handle->data_stream) {
janus_ice_stream *stream = handle->data_stream;
if(stream->rtp_component)
janus_dtls_srtp_send_alert(stream->rtp_component->dtls);
if(stream->rtcp_component)
janus_dtls_srtp_send_alert(stream->rtcp_component->dtls);
}
}
janus_mutex_unlock(&handle->mutex);
}
void janus_ice_webrtc_free(janus_ice_handle *handle) {
if(handle == NULL)
return;
janus_mutex_lock(&handle->mutex);
if(handle->iceloop != NULL) {
g_main_loop_unref (handle->iceloop);
handle->iceloop = NULL;
}
if(handle->icectx != NULL) {
g_main_context_unref (handle->icectx);
handle->icectx = NULL;
}
handle->icethread = NULL;
if(handle->streams != NULL) {
janus_ice_stream_free(handle->streams, handle->audio_stream);
handle->audio_stream = NULL;
janus_ice_stream_free(handle->streams, handle->video_stream);
handle->video_stream = NULL;
janus_ice_stream_free(handle->streams, handle->data_stream);
handle->data_stream = NULL;
g_hash_table_destroy(handle->streams);
handle->streams = NULL;
}
if(handle->agent != NULL) {
if(G_IS_OBJECT(handle->agent))
g_object_unref(handle->agent);
handle->agent = NULL;
}
if(handle->remote_hashing != NULL) {
g_free(handle->remote_hashing);
handle->remote_hashing = NULL;
}
if(handle->remote_fingerprint != NULL) {
g_free(handle->remote_fingerprint);
handle->remote_fingerprint = NULL;
}
if(handle->local_sdp != NULL) {
g_free(handle->local_sdp);
handle->local_sdp = NULL;
}
if(handle->remote_sdp != NULL) {
g_free(handle->remote_sdp);
handle->remote_sdp = NULL;
}
if(handle->queued_packets != NULL) {
janus_ice_queued_packet *pkt = NULL;
while(g_async_queue_length(handle->queued_packets) > 0) {
pkt = g_async_queue_try_pop(handle->queued_packets);
if(pkt != NULL) {
g_free(pkt->data);
pkt->data = NULL;
g_free(pkt);
pkt = NULL;
}
}
g_async_queue_unref(handle->queued_packets);
handle->queued_packets = NULL;
}
janus_flags_clear(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_READY);
janus_flags_clear(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_CLEANING);
janus_mutex_unlock(&handle->mutex);
JANUS_LOG(LOG_INFO, "[%"SCNu64"] WebRTC resources freed\n", handle->handle_id);
}
void janus_ice_stream_free(GHashTable *streams, janus_ice_stream *stream) {
if(stream == NULL)
return;
if(streams != NULL)
g_hash_table_remove(streams, stream);
if(stream->components != NULL) {
janus_ice_component_free(stream->components, stream->rtp_component);
stream->rtp_component = NULL;
janus_ice_component_free(stream->components, stream->rtcp_component);
stream->rtcp_component = NULL;
g_hash_table_destroy(stream->components);
}
stream->handle = NULL;
if(stream->ruser != NULL) {
g_free(stream->ruser);
stream->ruser = NULL;
}
if(stream->rpass != NULL) {
g_free(stream->rpass);
stream->rpass = NULL;
}
g_free(stream);
stream = NULL;
}
void janus_ice_component_free(GHashTable *components, janus_ice_component *component) {
if(component == NULL)
return;
janus_ice_stream *stream = component->stream;
if(stream == NULL)
return;
janus_ice_handle *handle = stream->handle;
if(handle == NULL)
return;
//~ janus_mutex_lock(&handle->mutex);
if(components != NULL)
g_hash_table_remove(components, component);
component->stream = NULL;
if(component->source != NULL) {
g_source_destroy(component->source);
if(G_IS_OBJECT(component->source))
g_object_unref(component->source);
component->source = NULL;
}
if(component->dtls != NULL) {
janus_dtls_srtp_destroy(component->dtls);
component->dtls = NULL;
}
if(component->retransmit_buffer != NULL) {
janus_rtp_packet *p = NULL;
GList *first = g_list_first(component->retransmit_buffer);
while(first != NULL) {
p = (janus_rtp_packet *)first->data;
first->data = NULL;
component->retransmit_buffer = g_list_delete_link(component->retransmit_buffer, first);
g_free(p->data);
p->data = NULL;
g_free(p);
first = g_list_first(component->retransmit_buffer);
}
}
if(component->candidates != NULL) {
GSList *i = NULL, *candidates = component->candidates;
for (i = candidates; i; i = i->next) {
NiceCandidate *c = (NiceCandidate *) i->data;
if(c != NULL) {
nice_candidate_free(c);
c = NULL;
}
}
g_slist_free(candidates);
candidates = NULL;
}
component->candidates = NULL;
if(component->local_candidates != NULL) {
GSList *i = NULL, *candidates = component->local_candidates;
for (i = candidates; i; i = i->next) {
gchar *c = (gchar *) i->data;
if(c != NULL) {
g_free(c);
c = NULL;
}
}
g_slist_free(candidates);
candidates = NULL;
}
component->local_candidates = NULL;
if(component->remote_candidates != NULL) {
GSList *i = NULL, *candidates = component->remote_candidates;
for (i = candidates; i; i = i->next) {
gchar *c = (gchar *) i->data;
if(c != NULL) {
g_free(c);
c = NULL;
}
}
g_slist_free(candidates);
candidates = NULL;
}
component->remote_candidates = NULL;
if(component->selected_pair != NULL)
g_free(component->selected_pair);
component->selected_pair = NULL;
g_free(component);
//~ janus_mutex_unlock(&handle->mutex);
}
/* Callbacks */
void janus_ice_cb_candidate_gathering_done(NiceAgent *agent, guint stream_id, gpointer user_data) {
janus_ice_handle *handle = (janus_ice_handle *)user_data;
if(!handle)
return;
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Gathering done for stream %d\n", handle->handle_id, stream_id);
handle->cdone++;
janus_ice_stream *stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(stream_id));
if(!stream) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No stream %d??\n", handle->handle_id, stream_id);
return;
}
stream->cdone = 1;
}
void janus_ice_cb_component_state_changed(NiceAgent *agent, guint stream_id, guint component_id, guint state, gpointer ice) {
janus_ice_handle *handle = (janus_ice_handle *)ice;
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Component state changed for component %d in stream %d: %d (%s)\n",
handle ? handle->handle_id : 0, component_id, stream_id, state, janus_get_ice_state_name(state));
if(!handle)
return;
janus_ice_stream *stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(stream_id));
if(!stream) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No stream %d??\n", handle->handle_id, stream_id);
return;
}
janus_ice_component *component = g_hash_table_lookup(stream->components, GUINT_TO_POINTER(component_id));
if(!component) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No component %d in stream %d??\n", handle->handle_id, component_id, stream_id);
return;
}
component->state = state;
/* FIXME Even in case the state is 'connected', we wait for the 'new-selected-pair' callback to do anything */
if(state == NICE_COMPONENT_STATE_FAILED) {
/* Failed doesn't mean necessarily we need to give up: we may be trickling */
if(handle &&
(!janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_TRICKLE) || janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALL_TRICKLES))
&& !janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALERT)) {
/* FIXME Should we really give up for what may be a failure in only one of the media? */
if(stream->disabled) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] ICE failed for component %d in stream %d, but stream is disabled so we don't care...\n", handle->handle_id, component_id, stream_id);
return;
}
JANUS_LOG(LOG_ERR, "[%"SCNu64"] ICE failed for component %d in stream %d...\n", handle->handle_id, component_id, stream_id);
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALERT);
janus_plugin *plugin = (janus_plugin *)handle->app;
if(plugin != NULL) {
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Telling the plugin about it (%s)\n", handle->handle_id, plugin->get_name());
if(plugin && plugin->hangup_media)
plugin->hangup_media(handle->app_handle);
}
janus_ice_notify_hangup(handle, "ICE failed");
}
}
}
#ifndef HAVE_LIBNICE_TCP
void janus_ice_cb_new_selected_pair (NiceAgent *agent, guint stream_id, guint component_id, gchar *local, gchar *remote, gpointer ice) {
#else
void janus_ice_cb_new_selected_pair (NiceAgent *agent, guint stream_id, guint component_id, NiceCandidate *local, NiceCandidate *remote, gpointer ice) {
#endif
janus_ice_handle *handle = (janus_ice_handle *)ice;
#ifndef HAVE_LIBNICE_TCP
JANUS_LOG(LOG_VERB, "[%"SCNu64"] New selected pair for component %d in stream %d: %s <-> %s\n", handle ? handle->handle_id : 0, component_id, stream_id, local, remote);
#else
JANUS_LOG(LOG_VERB, "[%"SCNu64"] New selected pair for component %d in stream %d: %s <-> %s\n", handle ? handle->handle_id : 0, component_id, stream_id, local->foundation, remote->foundation);
#endif
if(!handle)
return;
janus_ice_stream *stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(stream_id));
if(!stream) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No stream %d??\n", handle->handle_id, stream_id);
return;
}
janus_ice_component *component = g_hash_table_lookup(stream->components, GUINT_TO_POINTER(component_id));
if(!component) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No component %d in stream %d??\n", handle->handle_id, component_id, stream_id);
return;
}
if(component->selected_pair)
g_free(component->selected_pair);
char sp[200];
#ifndef HAVE_LIBNICE_TCP
g_snprintf(sp, 200, "%s <-> %s", local, remote);
#else
gchar laddress[NICE_ADDRESS_STRING_LEN], raddress[NICE_ADDRESS_STRING_LEN];
gint lport = 0, rport = 0;
nice_address_to_string(&(local->addr), (gchar *)&laddress);
nice_address_to_string(&(remote->addr), (gchar *)&raddress);
lport = nice_address_get_port(&(local->addr));
rport = nice_address_get_port(&(remote->addr));
const char *ltype = NULL, *rtype = NULL;
switch(local->type) {
case NICE_CANDIDATE_TYPE_HOST:
ltype = "host";
break;
case NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE:
ltype = "srflx";
break;
case NICE_CANDIDATE_TYPE_PEER_REFLEXIVE:
ltype = "prflx";
break;
case NICE_CANDIDATE_TYPE_RELAYED:
ltype = "relay";
break;
default:
break;
}
switch(remote->type) {
case NICE_CANDIDATE_TYPE_HOST:
rtype = "host";
break;
case NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE:
rtype = "srflx";
break;
case NICE_CANDIDATE_TYPE_PEER_REFLEXIVE:
rtype = "prflx";
break;
case NICE_CANDIDATE_TYPE_RELAYED:
rtype = "relay";
break;
default:
break;
}
g_snprintf(sp, 200, "%s:%d [%s,%s] <-> %s:%d [%s,%s]",
laddress, lport, ltype, local->transport == NICE_CANDIDATE_TRANSPORT_UDP ? "udp" : "tcp",
raddress, rport, rtype, remote->transport == NICE_CANDIDATE_TRANSPORT_UDP ? "udp" : "tcp");
#endif
component->selected_pair = g_strdup(sp);
/* Now we can start the DTLS handshake (FIXME This was on the 'connected' state notification, before) */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Component is ready enough, starting DTLS handshake...\n", handle->handle_id);
/* Have we been here before? (might happen, when trickling) */
if(component->dtls != NULL)
return;
/* Create DTLS-SRTP context, at last */
component->dtls = janus_dtls_srtp_create(component, stream->dtls_role);
if(!component->dtls) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No component DTLS-SRTP session??\n", handle->handle_id);
return;
}
janus_dtls_srtp_handshake(component->dtls);
/* Create retransmission timer */
component->source = g_timeout_source_new(100);
g_source_set_callback(component->source, janus_dtls_retry, component->dtls, NULL);
guint id = g_source_attach(component->source, handle->icectx);
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Creating retransmission timer with ID %u\n", handle->handle_id, id);
}
void janus_ice_cb_nice_recv(NiceAgent *agent, guint stream_id, guint component_id, guint len, gchar *buf, gpointer ice) {
janus_ice_component *component = (janus_ice_component *)ice;
if(!component) {
JANUS_LOG(LOG_ERR, "No component %d in stream %d??\n", component_id, stream_id);
return;
}
janus_ice_stream *stream = component->stream;
if(!stream) {
JANUS_LOG(LOG_ERR, "No stream %d??\n", stream_id);
return;
}
janus_ice_handle *handle = stream->handle;
if(!handle) {
JANUS_LOG(LOG_ERR, "No handle for stream %d??\n", stream_id);
return;
}
if(!component->dtls) { /* Still waiting for the DTLS stack */
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Still waiting for the DTLS stack for component %d in stream %d...\n", handle->handle_id, component_id, stream_id);
return;
}
/* What is this? */
if (janus_is_dtls(buf) || (!janus_is_rtp(buf) && !janus_is_rtcp(buf))) {
/* This is DTLS: either handshake stuff, or data coming from SCTP DataChannels */
JANUS_LOG(LOG_VERB, "[%"SCNu64"] Looks like DTLS!\n", handle->handle_id);
janus_dtls_srtp_incoming_msg(component->dtls, buf, len);
/* Update stats (TODO Do the same for the last second window as well) */
component->in_stats.data_bytes += len;
return;
}
/* Not DTLS... RTP or RTCP? (http://tools.ietf.org/html/rfc5761#section-4) */
if(len < 12)
return; /* Definitely nothing useful */
if(component_id == 1 && (!janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_RTCPMUX) || janus_is_rtp(buf))) {