gstreamer/gst/rtsp-server/rtsp-client.c

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2008-10-09 12:29:12 +00:00
/* GStreamer
* Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <sys/ioctl.h>
#include "rtsp-client.h"
#include "rtsp-sdp.h"
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#define DEBUG
static GMutex *tunnels_lock;
static GHashTable *tunnels;
enum
{
PROP_0,
PROP_SESSION_POOL,
PROP_MEDIA_MAPPING,
PROP_LAST
};
static void gst_rtsp_client_get_property (GObject *object, guint propid,
GValue *value, GParamSpec *pspec);
static void gst_rtsp_client_set_property (GObject *object, guint propid,
const GValue *value, GParamSpec *pspec);
static void gst_rtsp_client_finalize (GObject * obj);
static void client_session_finalized (GstRTSPClient *client, GstRTSPSession *session);
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G_DEFINE_TYPE (GstRTSPClient, gst_rtsp_client, G_TYPE_OBJECT);
static void
gst_rtsp_client_class_init (GstRTSPClientClass * klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = gst_rtsp_client_get_property;
gobject_class->set_property = gst_rtsp_client_set_property;
gobject_class->finalize = gst_rtsp_client_finalize;
g_object_class_install_property (gobject_class, PROP_SESSION_POOL,
g_param_spec_object ("session-pool", "Session Pool",
"The session pool to use for client session",
GST_TYPE_RTSP_SESSION_POOL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MEDIA_MAPPING,
g_param_spec_object ("media-mapping", "Media Mapping",
"The media mapping to use for client session",
GST_TYPE_RTSP_MEDIA_MAPPING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
tunnels = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
tunnels_lock = g_mutex_new ();
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}
static void
gst_rtsp_client_init (GstRTSPClient * client)
{
}
/* A client is finalized when the connection is broken */
static void
gst_rtsp_client_finalize (GObject * obj)
{
GstRTSPClient *client = GST_RTSP_CLIENT (obj);
g_message ("finalize client %p", client);
g_list_free (client->sessions);
gst_rtsp_connection_free (client->connection);
if (client->session_pool)
g_object_unref (client->session_pool);
if (client->media_mapping)
g_object_unref (client->media_mapping);
if (client->uri)
gst_rtsp_url_free (client->uri);
if (client->media)
g_object_unref (client->media);
G_OBJECT_CLASS (gst_rtsp_client_parent_class)->finalize (obj);
}
static void
gst_rtsp_client_get_property (GObject *object, guint propid,
GValue *value, GParamSpec *pspec)
{
GstRTSPClient *client = GST_RTSP_CLIENT (object);
switch (propid) {
case PROP_SESSION_POOL:
g_value_take_object (value, gst_rtsp_client_get_session_pool (client));
break;
case PROP_MEDIA_MAPPING:
g_value_take_object (value, gst_rtsp_client_get_media_mapping (client));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
}
}
static void
gst_rtsp_client_set_property (GObject *object, guint propid,
const GValue *value, GParamSpec *pspec)
{
GstRTSPClient *client = GST_RTSP_CLIENT (object);
switch (propid) {
case PROP_SESSION_POOL:
gst_rtsp_client_set_session_pool (client, g_value_get_object (value));
break;
case PROP_MEDIA_MAPPING:
gst_rtsp_client_set_media_mapping (client, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
}
}
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/**
* gst_rtsp_client_new:
*
* Create a new #GstRTSPClient instance.
*/
GstRTSPClient *
gst_rtsp_client_new (void)
{
GstRTSPClient *result;
result = g_object_new (GST_TYPE_RTSP_CLIENT, NULL);
return result;
}
static void
send_response (GstRTSPClient *client, GstRTSPSession *session, GstRTSPMessage *response)
{
gst_rtsp_message_add_header (response, GST_RTSP_HDR_SERVER, "GStreamer RTSP server");
/* remove any previous header */
gst_rtsp_message_remove_header (response, GST_RTSP_HDR_SESSION, -1);
/* add the new session header for new session ids */
if (session) {
gchar *str;
if (session->timeout != 60)
str = g_strdup_printf ("%s; timeout=%d", session->sessionid, session->timeout);
else
str = g_strdup (session->sessionid);
gst_rtsp_message_take_header (response, GST_RTSP_HDR_SESSION, str);
}
#ifdef DEBUG
gst_rtsp_message_dump (response);
#endif
gst_rtsp_watch_queue_message (client->watch, response);
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gst_rtsp_message_unset (response);
}
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static void
send_generic_response (GstRTSPClient *client, GstRTSPStatusCode code,
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GstRTSPMessage *request)
{
GstRTSPMessage response = { 0 };
gst_rtsp_message_init_response (&response, code,
gst_rtsp_status_as_text (code), request);
send_response (client, NULL, &response);
}
static gboolean
compare_uri (const GstRTSPUrl *uri1, const GstRTSPUrl *uri2)
{
if (uri1 == NULL || uri2 == NULL)
return FALSE;
if (strcmp (uri1->abspath, uri2->abspath))
return FALSE;
return TRUE;
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}
/* this function is called to initially find the media for the DESCRIBE request
* but is cached for when the same client (without breaking the connection) is
* doing a setup for the exact same url. */
static GstRTSPMedia *
find_media (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPMessage *request)
{
GstRTSPMediaFactory *factory;
GstRTSPMedia *media;
if (!compare_uri (client->uri, uri)) {
/* remove any previously cached values before we try to construct a new
* media for uri */
if (client->uri)
gst_rtsp_url_free (client->uri);
client->uri = NULL;
if (client->media)
g_object_unref (client->media);
client->media = NULL;
if (!client->media_mapping)
goto no_mapping;
/* find the factory for the uri first */
if (!(factory = gst_rtsp_media_mapping_find_factory (client->media_mapping, uri)))
goto no_factory;
/* prepare the media and add it to the pipeline */
if (!(media = gst_rtsp_media_factory_construct (factory, uri)))
goto no_media;
/* prepare the media */
if (!(gst_rtsp_media_prepare (media)))
goto no_prepare;
/* now keep track of the uri and the media */
client->uri = gst_rtsp_url_copy (uri);
client->media = media;
}
else {
/* we have seen this uri before, used cached media */
media = client->media;
g_message ("reusing cached media %p", media);
}
if (media)
g_object_ref (media);
return media;
/* ERRORS */
no_mapping:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
return NULL;
}
no_factory:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
return NULL;
}
no_media:
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
g_object_unref (factory);
return NULL;
}
no_prepare:
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
g_object_unref (media);
g_object_unref (factory);
return NULL;
}
}
static gboolean
do_send_data (GstBuffer *buffer, guint8 channel, GstRTSPClient *client)
{
GstRTSPMessage message = { 0 };
guint8 *data;
guint size;
gst_rtsp_message_init_data (&message, channel);
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
gst_rtsp_message_take_body (&message, data, size);
gst_rtsp_watch_queue_message (client->watch, &message);
gst_rtsp_message_steal_body (&message, &data, &size);
gst_rtsp_message_unset (&message);
return TRUE;
}
static void
link_stream (GstRTSPClient *client, GstRTSPSessionStream *stream)
{
gst_rtsp_session_stream_set_callbacks (stream, (GstRTSPSendFunc) do_send_data,
(GstRTSPSendFunc) do_send_data, client, NULL);
client->streams = g_list_prepend (client->streams, stream);
}
static void
unlink_stream (GstRTSPClient *client, GstRTSPSessionStream *stream)
{
gst_rtsp_session_stream_set_callbacks (stream, NULL,
NULL, NULL, NULL);
client->streams = g_list_remove (client->streams, stream);
}
static void
unlink_streams (GstRTSPClient *client)
{
GList *walk;
for (walk = client->streams; walk; walk = g_list_next (walk)) {
GstRTSPSessionStream *stream = (GstRTSPSessionStream *) walk->data;
gst_rtsp_session_stream_set_callbacks (stream, NULL,
NULL, NULL, NULL);
}
g_list_free (client->streams);
client->streams = NULL;
}
static void
unlink_session_streams (GstRTSPClient *client, GstRTSPSessionMedia *media)
{
guint n_streams, i;
n_streams = gst_rtsp_media_n_streams (media->media);
for (i = 0; i < n_streams; i++) {
GstRTSPSessionStream *sstream;
GstRTSPTransport *tr;
/* get the stream as configured in the session */
sstream = gst_rtsp_session_media_get_stream (media, i);
/* get the transport, if there is no transport configured, skip this stream */
if (!(tr = sstream->trans.transport))
continue;
if (tr->lower_transport == GST_RTSP_LOWER_TRANS_TCP) {
/* for TCP, unlink the stream from the TCP connection of the client */
unlink_stream (client, sstream);
}
}
}
static gboolean
handle_teardown_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
{
GstRTSPSessionMedia *media;
GstRTSPMessage response = { 0 };
GstRTSPStatusCode code;
if (!session)
goto no_session;
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/* get a handle to the configuration of the media in the session */
media = gst_rtsp_session_get_media (session, uri);
if (!media)
goto not_found;
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/* unlink the all TCP callbacks */
unlink_session_streams (client, media);
/* remove the session from the watched sessions */
g_object_weak_unref (G_OBJECT (session), (GWeakNotify) client_session_finalized, client);
client->sessions = g_list_remove (client->sessions, session);
gst_rtsp_session_media_set_state (media, GST_STATE_NULL);
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/* unmanage the media in the session, returns false if all media session
* are torn down. */
if (!gst_rtsp_session_release_media (session, media)) {
/* remove the session */
gst_rtsp_session_pool_remove (client->session_pool, session);
}
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/* construct the response now */
code = GST_RTSP_STS_OK;
gst_rtsp_message_init_response (&response, code, gst_rtsp_status_as_text (code), request);
send_response (client, session, &response);
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return FALSE;
/* ERRORS */
no_session:
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{
send_generic_response (client, GST_RTSP_STS_SESSION_NOT_FOUND, request);
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return FALSE;
}
not_found:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
return FALSE;
}
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}
static gboolean
handle_pause_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
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{
GstRTSPSessionMedia *media;
GstRTSPMessage response = { 0 };
GstRTSPStatusCode code;
if (!session)
goto no_session;
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/* get a handle to the configuration of the media in the session */
media = gst_rtsp_session_get_media (session, uri);
if (!media)
goto not_found;
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/* the session state must be playing or recording */
if (media->state != GST_RTSP_STATE_PLAYING &&
media->state != GST_RTSP_STATE_RECORDING)
goto invalid_state;
/* unlink the all TCP callbacks */
unlink_session_streams (client, media);
/* then pause sending */
gst_rtsp_session_media_set_state (media, GST_STATE_PAUSED);
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/* construct the response now */
code = GST_RTSP_STS_OK;
gst_rtsp_message_init_response (&response, code, gst_rtsp_status_as_text (code), request);
send_response (client, session, &response);
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/* the state is now READY */
media->state = GST_RTSP_STATE_READY;
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return FALSE;
/* ERRORS */
no_session:
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{
send_generic_response (client, GST_RTSP_STS_SESSION_NOT_FOUND, request);
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return FALSE;
}
not_found:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
return FALSE;
}
invalid_state:
{
send_generic_response (client, GST_RTSP_STS_METHOD_NOT_VALID_IN_THIS_STATE, request);
return FALSE;
}
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}
static gboolean
handle_play_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
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{
GstRTSPSessionMedia *media;
GstRTSPMessage response = { 0 };
GstRTSPStatusCode code;
GString *rtpinfo;
guint n_streams, i;
guint timestamp, seqnum;
gchar *str;
GstRTSPTimeRange *range;
GstRTSPResult res;
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if (!session)
goto no_session;
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/* get a handle to the configuration of the media in the session */
media = gst_rtsp_session_get_media (session, uri);
if (!media)
goto not_found;
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/* the session state must be playing or ready */
if (media->state != GST_RTSP_STATE_PLAYING &&
media->state != GST_RTSP_STATE_READY)
goto invalid_state;
/* parse the range header if we have one */
res = gst_rtsp_message_get_header (request, GST_RTSP_HDR_RANGE, &str, 0);
if (res == GST_RTSP_OK) {
if (gst_rtsp_range_parse (str, &range) == GST_RTSP_OK) {
/* we have a range, seek to the position */
gst_rtsp_media_seek (media->media, range);
gst_rtsp_range_free (range);
}
}
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/* grab RTPInfo from the payloaders now */
rtpinfo = g_string_new ("");
n_streams = gst_rtsp_media_n_streams (media->media);
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for (i = 0; i < n_streams; i++) {
GstRTSPSessionStream *sstream;
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GstRTSPMediaStream *stream;
GstRTSPTransport *tr;
gchar *uristr;
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/* get the stream as configured in the session */
sstream = gst_rtsp_session_media_get_stream (media, i);
/* get the transport, if there is no transport configured, skip this stream */
if (!(tr = sstream->trans.transport))
continue;
if (tr->lower_transport == GST_RTSP_LOWER_TRANS_TCP) {
/* for TCP, link the stream to the TCP connection of the client */
link_stream (client, sstream);
}
stream = sstream->media_stream;
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g_object_get (G_OBJECT (stream->payloader), "seqnum", &seqnum, NULL);
g_object_get (G_OBJECT (stream->payloader), "timestamp", &timestamp, NULL);
if (i > 0)
g_string_append (rtpinfo, ", ");
uristr = gst_rtsp_url_get_request_uri (uri);
g_string_append_printf (rtpinfo, "url=%s/stream=%d;seq=%u;rtptime=%u", uristr, i, seqnum, timestamp);
g_free (uristr);
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}
/* construct the response now */
code = GST_RTSP_STS_OK;
gst_rtsp_message_init_response (&response, code, gst_rtsp_status_as_text (code), request);
/* add the RTP-Info header */
str = g_string_free (rtpinfo, FALSE);
gst_rtsp_message_take_header (&response, GST_RTSP_HDR_RTP_INFO, str);
/* add the range */
str = gst_rtsp_range_to_string (&media->media->range);
gst_rtsp_message_take_header (&response, GST_RTSP_HDR_RANGE, str);
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send_response (client, session, &response);
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/* start playing after sending the request */
gst_rtsp_session_media_set_state (media, GST_STATE_PLAYING);
media->state = GST_RTSP_STATE_PLAYING;
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return FALSE;
/* ERRORS */
no_session:
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{
send_generic_response (client, GST_RTSP_STS_SESSION_NOT_FOUND, request);
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return FALSE;
}
not_found:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
return FALSE;
}
invalid_state:
{
send_generic_response (client, GST_RTSP_STS_METHOD_NOT_VALID_IN_THIS_STATE, request);
return FALSE;
}
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}
static gboolean
handle_setup_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
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{
GstRTSPResult res;
gchar *transport;
gchar **transports;
gboolean have_transport;
GstRTSPTransport *ct, *st;
gint i;
GstRTSPLowerTrans supported;
GstRTSPMessage response = { 0 };
GstRTSPStatusCode code;
GstRTSPSessionStream *stream;
gchar *trans_str, *pos;
guint streamid;
GstRTSPSessionMedia *media;
gboolean need_session;
GstRTSPUrl *url;
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/* the uri contains the stream number we added in the SDP config, which is
* always /stream=%d so we need to strip that off
* parse the stream we need to configure, look for the stream in the abspath
* first and then in the query. */
if (!(pos = strstr (uri->abspath, "/stream="))) {
if (!(pos = strstr (uri->query, "/stream=")))
goto bad_request;
}
/* we can mofify the parse uri in place */
*pos = '\0';
pos += strlen ("/stream=");
if (sscanf (pos, "%u", &streamid) != 1)
goto bad_request;
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/* parse the transport */
res = gst_rtsp_message_get_header (request, GST_RTSP_HDR_TRANSPORT, &transport, 0);
if (res != GST_RTSP_OK)
goto no_transport;
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transports = g_strsplit (transport, ",", 0);
gst_rtsp_transport_new (&ct);
/* loop through the transports, try to parse */
have_transport = FALSE;
for (i = 0; transports[i]; i++) {
gst_rtsp_transport_init (ct);
res = gst_rtsp_transport_parse (transports[i], ct);
if (res == GST_RTSP_OK) {
have_transport = TRUE;
break;
}
}
g_strfreev (transports);
/* we have not found anything usable, error out */
if (!have_transport)
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goto unsupported_transports;
/* we have a valid transport, check if we can handle it */
if (ct->trans != GST_RTSP_TRANS_RTP)
goto unsupported_transports;
if (ct->profile != GST_RTSP_PROFILE_AVP)
goto unsupported_transports;
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supported = GST_RTSP_LOWER_TRANS_UDP |
GST_RTSP_LOWER_TRANS_UDP_MCAST |
GST_RTSP_LOWER_TRANS_TCP;
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if (!(ct->lower_transport & supported))
goto unsupported_transports;
if (client->session_pool == NULL)
goto no_pool;
/* we have a valid transport now, set the destination of the client. */
g_free (ct->destination);
url = gst_rtsp_connection_get_url (client->connection);
ct->destination = g_strdup (url->host);
if (session) {
g_object_ref (session);
/* get a handle to the configuration of the media in the session, this can
* return NULL if this is a new url to manage in this session. */
media = gst_rtsp_session_get_media (session, uri);
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need_session = FALSE;
}
else {
/* create a session if this fails we probably reached our session limit or
* something. */
if (!(session = gst_rtsp_session_pool_create (client->session_pool)))
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goto service_unavailable;
/* we need a new media configuration in this session */
media = NULL;
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need_session = TRUE;
}
/* we have no media, find one and manage it */
if (media == NULL) {
GstRTSPMedia *m;
/* get a handle to the configuration of the media in the session */
if ((m = find_media (client, uri, request))) {
/* manage the media in our session now */
media = gst_rtsp_session_manage_media (session, uri, m);
}
}
/* if we stil have no media, error */
if (media == NULL)
goto not_found;
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/* get a handle to the stream in the media */
if (!(stream = gst_rtsp_session_media_get_stream (media, streamid)))
goto no_stream;
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st = gst_rtsp_session_stream_set_transport (stream, ct);
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/* serialize the server transport */
trans_str = gst_rtsp_transport_as_text (st);
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gst_rtsp_transport_free (st);
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/* construct the response now */
code = GST_RTSP_STS_OK;
gst_rtsp_message_init_response (&response, code, gst_rtsp_status_as_text (code), request);
gst_rtsp_message_add_header (&response, GST_RTSP_HDR_TRANSPORT, trans_str);
g_free (trans_str);
send_response (client, session, &response);
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/* update the state */
switch (media->state) {
case GST_RTSP_STATE_PLAYING:
case GST_RTSP_STATE_RECORDING:
case GST_RTSP_STATE_READY:
/* no state change */
break;
default:
media->state = GST_RTSP_STATE_READY;
break;
}
g_object_unref (session);
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return TRUE;
/* ERRORS */
bad_request:
{
send_generic_response (client, GST_RTSP_STS_BAD_REQUEST, request);
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return FALSE;
}
not_found:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
g_object_unref (session);
return FALSE;
}
no_stream:
{
send_generic_response (client, GST_RTSP_STS_NOT_FOUND, request);
g_object_unref (media);
g_object_unref (session);
2008-10-09 12:29:12 +00:00
return FALSE;
}
no_transport:
{
send_generic_response (client, GST_RTSP_STS_UNSUPPORTED_TRANSPORT, request);
return FALSE;
}
2008-10-09 12:29:12 +00:00
unsupported_transports:
{
send_generic_response (client, GST_RTSP_STS_UNSUPPORTED_TRANSPORT, request);
gst_rtsp_transport_free (ct);
2008-10-09 12:29:12 +00:00
return FALSE;
}
no_pool:
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
return FALSE;
}
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service_unavailable:
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
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return FALSE;
}
}
/* for the describe we must generate an SDP */
2008-10-09 12:29:12 +00:00
static gboolean
handle_describe_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
2008-10-09 12:29:12 +00:00
{
GstRTSPMessage response = { 0 };
GstRTSPResult res;
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GstSDPMessage *sdp;
guint i;
gchar *str;
GstRTSPMedia *media;
2008-10-09 12:29:12 +00:00
/* check what kind of format is accepted, we don't really do anything with it
* and always return SDP for now. */
for (i = 0; i++; ) {
gchar *accept;
res = gst_rtsp_message_get_header (request, GST_RTSP_HDR_ACCEPT, &accept, i);
if (res == GST_RTSP_ENOTIMPL)
break;
if (g_ascii_strcasecmp (accept, "application/sdp") == 0)
break;
}
2008-10-09 12:29:12 +00:00
/* find the media object for the uri */
if (!(media = find_media (client, uri, request)))
goto no_media;
/* create an SDP for the media object */
if (!(sdp = gst_rtsp_sdp_from_media (media)))
goto no_sdp;
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g_object_unref (media);
2008-10-09 12:29:12 +00:00
gst_rtsp_message_init_response (&response, GST_RTSP_STS_OK,
gst_rtsp_status_as_text (GST_RTSP_STS_OK), request);
gst_rtsp_message_add_header (&response, GST_RTSP_HDR_CONTENT_TYPE, "application/sdp");
/* content base for some clients that might screw up creating the setup uri */
str = g_strdup_printf ("rtsp://%s:%u%s/", uri->host, uri->port, uri->abspath);
gst_rtsp_message_add_header (&response, GST_RTSP_HDR_CONTENT_BASE, str);
g_free (str);
2008-10-09 12:29:12 +00:00
/* add SDP to the response body */
str = gst_sdp_message_as_text (sdp);
gst_rtsp_message_take_body (&response, (guint8 *)str, strlen (str));
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gst_sdp_message_free (sdp);
send_response (client, session, &response);
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return TRUE;
/* ERRORS */
no_media:
{
/* error reply is already sent */
return FALSE;
}
no_sdp:
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
g_object_unref (media);
return FALSE;
}
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}
static void
handle_options_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *session, GstRTSPMessage *request)
2008-10-09 12:29:12 +00:00
{
GstRTSPMessage response = { 0 };
GstRTSPMethod options;
gchar *str;
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options = GST_RTSP_DESCRIBE |
GST_RTSP_OPTIONS |
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GST_RTSP_PAUSE |
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GST_RTSP_PLAY |
GST_RTSP_SETUP |
GST_RTSP_TEARDOWN;
str = gst_rtsp_options_as_text (options);
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gst_rtsp_message_init_response (&response, GST_RTSP_STS_OK,
gst_rtsp_status_as_text (GST_RTSP_STS_OK), request);
gst_rtsp_message_add_header (&response, GST_RTSP_HDR_PUBLIC, str);
g_free (str);
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send_response (client, session, &response);
}
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/* remove duplicate and trailing '/' */
static void
santize_uri (GstRTSPUrl *uri)
{
gint i, len;
gchar *s, *d;
gboolean have_slash, prev_slash;
s = d = uri->abspath;
len = strlen (uri->abspath);
prev_slash = FALSE;
for (i = 0; i < len; i++) {
have_slash = s[i] == '/';
*d = s[i];
if (!have_slash || !prev_slash)
d++;
prev_slash = have_slash;
}
len = d - uri->abspath;
/* don't remove the first slash if that's the only thing left */
if (len > 1 && *(d-1) == '/')
d--;
*d = '\0';
2008-10-09 12:29:12 +00:00
}
static void
client_session_finalized (GstRTSPClient *client, GstRTSPSession *session)
{
if (!(client->sessions = g_list_remove (client->sessions, session))) {
g_message ("all sessions finalized, close the connection");
g_source_destroy ((GSource*)client->watch);
}
}
static void
client_watch_session (GstRTSPClient *client, GstRTSPSession *session)
{
GList *walk;
for (walk = client->sessions; walk; walk = g_list_next (walk)) {
GstRTSPSession *msession = (GstRTSPSession *) walk->data;
/* we already know about this session */
if (msession == session)
return;
}
g_message ("watching session %p", session);
g_object_weak_ref (G_OBJECT (session), (GWeakNotify) client_session_finalized, client);
client->sessions = g_list_prepend (client->sessions, session);
}
static void
handle_request (GstRTSPClient *client, GstRTSPMessage *request)
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{
GstRTSPMethod method;
const gchar *uristr;
GstRTSPUrl *uri;
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GstRTSPVersion version;
GstRTSPResult res;
GstRTSPSession *session;
gchar *sessid;
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#ifdef DEBUG
gst_rtsp_message_dump (request);
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#endif
g_message ("client %p: received a request", client);
gst_rtsp_message_parse_request (request, &method, &uristr, &version);
if (version != GST_RTSP_VERSION_1_0) {
/* we can only handle 1.0 requests */
send_generic_response (client, GST_RTSP_STS_RTSP_VERSION_NOT_SUPPORTED, request);
return;
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}
/* we always try to parse the url first */
if ((res = gst_rtsp_url_parse (uristr, &uri)) != GST_RTSP_OK) {
send_generic_response (client, GST_RTSP_STS_BAD_REQUEST, request);
return;
2008-10-09 12:29:12 +00:00
}
/* sanitize the uri */
santize_uri (uri);
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/* get the session if there is any */
res = gst_rtsp_message_get_header (request, GST_RTSP_HDR_SESSION, &sessid, 0);
if (res == GST_RTSP_OK) {
if (client->session_pool == NULL)
goto no_pool;
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/* we had a session in the request, find it again */
if (!(session = gst_rtsp_session_pool_find (client->session_pool, sessid)))
goto session_not_found;
2008-10-09 12:29:12 +00:00
/* we add the session to the client list of watched sessions. When a session
* disappears because it times out, we will be notified. If all sessions are
* gone, we will close the connection */
client_watch_session (client, session);
}
else
session = NULL;
/* now see what is asked and dispatch to a dedicated handler */
switch (method) {
case GST_RTSP_OPTIONS:
handle_options_request (client, uri, session, request);
break;
case GST_RTSP_DESCRIBE:
handle_describe_request (client, uri, session, request);
break;
case GST_RTSP_SETUP:
handle_setup_request (client, uri, session, request);
break;
case GST_RTSP_PLAY:
handle_play_request (client, uri, session, request);
break;
case GST_RTSP_PAUSE:
handle_pause_request (client, uri, session, request);
break;
case GST_RTSP_TEARDOWN:
handle_teardown_request (client, uri, session, request);
break;
case GST_RTSP_ANNOUNCE:
case GST_RTSP_GET_PARAMETER:
case GST_RTSP_RECORD:
case GST_RTSP_REDIRECT:
case GST_RTSP_SET_PARAMETER:
send_generic_response (client, GST_RTSP_STS_NOT_IMPLEMENTED, request);
break;
case GST_RTSP_INVALID:
default:
send_generic_response (client, GST_RTSP_STS_BAD_REQUEST, request);
break;
}
if (session)
g_object_unref (session);
gst_rtsp_url_free (uri);
return;
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/* ERRORS */
no_pool:
2008-10-09 12:29:12 +00:00
{
send_generic_response (client, GST_RTSP_STS_SERVICE_UNAVAILABLE, request);
return;
}
session_not_found:
{
send_generic_response (client, GST_RTSP_STS_SESSION_NOT_FOUND, request);
return;
2008-10-09 12:29:12 +00:00
}
}
static void
handle_data (GstRTSPClient *client, GstRTSPMessage *message)
{
GstRTSPResult res;
guint8 channel;
GList *walk;
guint8 *data;
guint size;
GstBuffer *buffer;
gboolean handled;
/* find the stream for this message */
res = gst_rtsp_message_parse_data (message, &channel);
if (res != GST_RTSP_OK)
return;
gst_rtsp_message_steal_body (message, &data, &size);
buffer = gst_buffer_new ();
GST_BUFFER_DATA (buffer) = data;
GST_BUFFER_MALLOCDATA (buffer) = data;
GST_BUFFER_SIZE (buffer) = size;
handled = FALSE;
for (walk = client->streams; walk; walk = g_list_next (walk)) {
GstRTSPSessionStream *stream = (GstRTSPSessionStream *) walk->data;
GstRTSPMediaStream *mstream;
GstRTSPTransport *tr;
/* get the transport, if there is no transport configured, skip this stream */
if (!(tr = stream->trans.transport))
continue;
/* we also need a media stream */
if (!(mstream = stream->media_stream))
continue;
/* check for TCP transport */
if (tr->lower_transport == GST_RTSP_LOWER_TRANS_TCP) {
/* dispatch to the stream based on the channel number */
if (tr->interleaved.min == channel) {
gst_rtsp_media_stream_rtp (mstream, buffer);
handled = TRUE;
break;
} else if (tr->interleaved.max == channel) {
gst_rtsp_media_stream_rtcp (mstream, buffer);
handled = TRUE;
break;
}
}
}
if (!handled)
gst_buffer_unref (buffer);
}
2008-10-09 12:29:12 +00:00
/**
* gst_rtsp_client_set_session_pool:
* @client: a #GstRTSPClient
* @pool: a #GstRTSPSessionPool
*
* Set @pool as the sessionpool for @client which it will use to find
* or allocate sessions. the sessionpool is usually inherited from the server
* that created the client but can be overridden later.
2008-10-09 12:29:12 +00:00
*/
void
gst_rtsp_client_set_session_pool (GstRTSPClient *client, GstRTSPSessionPool *pool)
{
GstRTSPSessionPool *old;
old = client->session_pool;
if (old != pool) {
if (pool)
g_object_ref (pool);
client->session_pool = pool;
if (old)
g_object_unref (old);
}
2008-10-09 12:29:12 +00:00
}
/**
* gst_rtsp_client_get_session_pool:
* @client: a #GstRTSPClient
*
* Get the #GstRTSPSessionPool object that @client uses to manage its sessions.
*
* Returns: a #GstRTSPSessionPool, unref after usage.
*/
GstRTSPSessionPool *
gst_rtsp_client_get_session_pool (GstRTSPClient *client)
{
GstRTSPSessionPool *result;
if ((result = client->session_pool))
2008-10-09 12:29:12 +00:00
g_object_ref (result);
return result;
}
/**
* gst_rtsp_client_set_media_mapping:
* @client: a #GstRTSPClient
* @mapping: a #GstRTSPMediaMapping
*
* Set @mapping as the media mapping for @client which it will use to map urls
* to media streams. These mapping is usually inherited from the server that
* created the client but can be overriden later.
*/
void
gst_rtsp_client_set_media_mapping (GstRTSPClient *client, GstRTSPMediaMapping *mapping)
{
GstRTSPMediaMapping *old;
old = client->media_mapping;
if (old != mapping) {
if (mapping)
g_object_ref (mapping);
client->media_mapping = mapping;
if (old)
g_object_unref (old);
}
}
/**
* gst_rtsp_client_get_media_mapping:
* @client: a #GstRTSPClient
*
* Get the #GstRTSPMediaMapping object that @client uses to manage its sessions.
*
* Returns: a #GstRTSPMediaMapping, unref after usage.
*/
GstRTSPMediaMapping *
gst_rtsp_client_get_media_mapping (GstRTSPClient *client)
{
GstRTSPMediaMapping *result;
if ((result = client->media_mapping))
g_object_ref (result);
return result;
}
static GstRTSPResult
message_received (GstRTSPWatch *watch, GstRTSPMessage *message, gpointer user_data)
{
GstRTSPClient *client = GST_RTSP_CLIENT (user_data);
switch (message->type) {
case GST_RTSP_MESSAGE_REQUEST:
handle_request (client, message);
break;
case GST_RTSP_MESSAGE_RESPONSE:
break;
case GST_RTSP_MESSAGE_DATA:
handle_data (client, message);
break;
default:
break;
}
return GST_RTSP_OK;
}
static GstRTSPResult
message_sent (GstRTSPWatch *watch, guint cseq, gpointer user_data)
{
GstRTSPClient *client = GST_RTSP_CLIENT (user_data);
g_message ("client %p: sent a message with cseq %d", client, cseq);
return GST_RTSP_OK;
}
static GstRTSPResult
closed (GstRTSPWatch *watch, gpointer user_data)
{
GstRTSPClient *client = GST_RTSP_CLIENT (user_data);
const gchar *tunnelid;
g_message ("client %p: connection closed", client);
if ((tunnelid = gst_rtsp_connection_get_tunnelid (client->connection))) {
g_mutex_lock (tunnels_lock);
g_hash_table_remove (tunnels, tunnelid);
g_mutex_unlock (tunnels_lock);
}
/* remove all streams that are streaming over this client connection */
unlink_streams (client);
return GST_RTSP_OK;
}
static GstRTSPResult
error (GstRTSPWatch *watch, GstRTSPResult result, gpointer user_data)
{
GstRTSPClient *client = GST_RTSP_CLIENT (user_data);
gchar *str;
str = gst_rtsp_strresult (result);
g_message ("client %p: received an error %s", client, str);
g_free (str);
return GST_RTSP_OK;
}
static GstRTSPStatusCode
tunnel_start (GstRTSPWatch *watch, gpointer user_data)
{
GstRTSPClient *client;
const gchar *tunnelid;
client = GST_RTSP_CLIENT (user_data);
g_message ("client %p: tunnel start", client);
/* store client in the pending tunnels */
tunnelid = gst_rtsp_connection_get_tunnelid (client->connection);
g_message ("client %p: inserting %s", client, tunnelid);
/* we can't have two clients connecting with the same tunnelid */
g_mutex_lock (tunnels_lock);
if (g_hash_table_lookup (tunnels, tunnelid))
goto tunnel_existed;
g_hash_table_insert (tunnels, g_strdup (tunnelid), g_object_ref (client));
g_mutex_unlock (tunnels_lock);
return GST_RTSP_STS_OK;
/* ERRORS */
tunnel_existed:
{
g_mutex_unlock (tunnels_lock);
g_message ("client %p: tunnel session %s existed", client, tunnelid);
return GST_RTSP_STS_SERVICE_UNAVAILABLE;
}
}
static GstRTSPResult
tunnel_complete (GstRTSPWatch *watch, gpointer user_data)
{
const gchar *tunnelid;
GstRTSPClient *client = GST_RTSP_CLIENT (user_data);
GstRTSPClient *oclient;
g_message ("client %p: tunnel complete", client);
/* find previous tunnel */
tunnelid = gst_rtsp_connection_get_tunnelid (client->connection);
g_mutex_lock (tunnels_lock);
if (!(oclient = g_hash_table_lookup (tunnels, tunnelid)))
goto no_tunnel;
/* remove the old client from the table. ref before because removing it will
* remove the ref to it. */
g_object_ref (oclient);
g_hash_table_remove (tunnels, tunnelid);
g_mutex_unlock (tunnels_lock);
g_message ("client %p: found tunnel %p", client, oclient);
/* merge the tunnels into the first client */
gst_rtsp_connection_do_tunnel (oclient->connection, client->connection);
gst_rtsp_watch_reset (oclient->watch);
g_object_unref (oclient);
/* we don't need this watch anymore */
g_source_remove (client->watchid);
return GST_RTSP_OK;
/* ERRORS */
no_tunnel:
{
g_mutex_unlock (tunnels_lock);
g_message ("client %p: tunnel session %s not found", client, tunnelid);
return GST_RTSP_OK;
}
}
static GstRTSPWatchFuncs watch_funcs = {
message_received,
message_sent,
closed,
error,
tunnel_start,
tunnel_complete
};
2008-10-09 12:29:12 +00:00
/**
* gst_rtsp_client_attach:
* @client: a #GstRTSPClient
* @channel: a #GIOChannel
2008-10-09 12:29:12 +00:00
*
* Accept a new connection for @client on the socket in @source.
2008-10-09 12:29:12 +00:00
*
* This function should be called when the client properties and urls are fully
* configured and the client is ready to start.
*
* Returns: %TRUE if the client could be accepted.
*/
gboolean
gst_rtsp_client_accept (GstRTSPClient *client, GIOChannel *channel)
2008-10-09 12:29:12 +00:00
{
int sock;
GstRTSPConnection *conn;
GstRTSPResult res;
GSource *source;
GMainContext *context;
GstRTSPUrl *url;
/* a new client connected. */
sock = g_io_channel_unix_get_fd (channel);
GST_RTSP_CHECK (gst_rtsp_connection_accept (sock, &conn), accept_failed);
url = gst_rtsp_connection_get_url (conn);
g_message ("added new client %p ip %s:%d", client,
url->host, url->port);
2008-10-09 12:29:12 +00:00
client->connection = conn;
/* create watch for the connection and attach */
client->watch = gst_rtsp_watch_new (client->connection, &watch_funcs,
g_object_ref (client), g_object_unref);
/* find the context to add the watch */
if ((source = g_main_current_source ()))
context = g_source_get_context (source);
else
context = NULL;
g_message ("attaching to context %p", context);
client->watchid = gst_rtsp_watch_attach (client->watch, context);
gst_rtsp_watch_unref (client->watch);
2008-10-09 12:29:12 +00:00
return TRUE;
/* ERRORS */
accept_failed:
{
gchar *str = gst_rtsp_strresult (res);
g_error ("Could not accept client on server socket %d: %s",
sock, str);
g_free (str);
return FALSE;
}
2008-10-09 12:29:12 +00:00
}