gstreamer/gst/rtsp/sdpmessage.c

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/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim@fluendo.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 <stdlib.h>
#include <string.h>
#include "sdpmessage.h"
#define FREE_STRING(field) g_free ((field)); (field) = NULL;
#define FREE_ARRAY(field) \
G_STMT_START { \
if (field) \
g_array_free (field, TRUE); \
field = NULL; \
} G_STMT_END
#define REPLACE_STRING(field,val) FREE_STRING(field);field=g_strdup (val);
#define INIT_ARRAY(field,type) \
G_STMT_START { \
if (field) \
g_array_set_size (field,0); \
else \
field = g_array_new (FALSE, TRUE, sizeof(type)); \
} G_STMT_END
#define DEFINE_STRING_SETTER(field) \
RTSPResult sdp_message_set_##field (SDPMessage *msg, gchar *val) { \
g_free (msg->field); \
msg->field = g_strdup (val); \
return RTSP_OK; \
}
#define DEFINE_STRING_GETTER(field) \
char* sdp_message_get_##field (SDPMessage *msg) { \
return msg->field; \
}
#define DEFINE_ARRAY_LEN(field) \
gint sdp_message_##field##_len (SDPMessage *msg) { \
return ((msg)->field->len); \
}
#define DEFINE_ARRAY_GETTER(method,field,type) \
type sdp_message_get_##method (SDPMessage *msg, gint i) { \
return g_array_index ((msg)->field, type, i); \
}
#define DEFINE_ARRAY_P_GETTER(method,field,type) \
type * sdp_message_get_##method (SDPMessage *msg, gint i) { \
return &g_array_index ((msg)->field, type, i); \
}
#define DEFINE_ARRAY_ADDER(method,field,type,dup_method) \
RTSPResult sdp_message_add_##method (SDPMessage *msg, type val) { \
type v = dup_method(val); \
g_array_append_val((msg)->field, v); \
return RTSP_OK; \
}
RTSPResult
sdp_message_new (SDPMessage ** msg)
{
SDPMessage *newmsg;
if (msg == NULL)
return RTSP_EINVAL;
newmsg = g_new0 (SDPMessage, 1);
*msg = newmsg;
return sdp_message_init (newmsg);
}
RTSPResult
sdp_message_init (SDPMessage * msg)
{
if (msg == NULL)
return RTSP_EINVAL;
FREE_STRING (msg->version);
FREE_STRING (msg->origin.username);
FREE_STRING (msg->origin.sess_id);
FREE_STRING (msg->origin.sess_version);
FREE_STRING (msg->origin.nettype);
FREE_STRING (msg->origin.addrtype);
FREE_STRING (msg->origin.addr);
FREE_STRING (msg->session_name);
FREE_STRING (msg->information);
FREE_STRING (msg->uri);
INIT_ARRAY (msg->emails, gchar *);
INIT_ARRAY (msg->phones, gchar *);
FREE_STRING (msg->connection.nettype);
FREE_STRING (msg->connection.addrtype);
FREE_STRING (msg->connection.address);
msg->connection.ttl = 0;
msg->connection.addr_number = 0;
INIT_ARRAY (msg->bandwidths, SDPBandwidth);
INIT_ARRAY (msg->times, SDPTime);
INIT_ARRAY (msg->zones, SDPZone);
FREE_STRING (msg->key.type);
FREE_STRING (msg->key.data);
INIT_ARRAY (msg->attributes, SDPAttribute);
INIT_ARRAY (msg->medias, SDPMedia);
return RTSP_OK;
}
RTSPResult
sdp_message_clean (SDPMessage * msg)
{
if (msg == NULL)
return RTSP_EINVAL;
FREE_ARRAY (msg->emails);
FREE_ARRAY (msg->phones);
FREE_ARRAY (msg->bandwidths);
FREE_ARRAY (msg->times);
FREE_ARRAY (msg->zones);
FREE_ARRAY (msg->attributes);
FREE_ARRAY (msg->medias);
return RTSP_OK;
}
RTSPResult
sdp_message_free (SDPMessage * msg)
{
if (msg == NULL)
return RTSP_EINVAL;
sdp_message_clean (msg);
g_free (msg);
return RTSP_OK;
}
RTSPResult
sdp_media_new (SDPMedia ** media)
{
SDPMedia *newmedia;
if (media == NULL)
return RTSP_EINVAL;
newmedia = g_new0 (SDPMedia, 1);
*media = newmedia;
return sdp_media_init (newmedia);
}
RTSPResult
sdp_media_init (SDPMedia * media)
{
if (media == NULL)
return RTSP_EINVAL;
FREE_STRING (media->media);
media->port = 0;
media->num_ports = 0;
FREE_STRING (media->proto);
INIT_ARRAY (media->fmts, gchar *);
FREE_STRING (media->information);
INIT_ARRAY (media->connections, SDPConnection);
INIT_ARRAY (media->bandwidths, SDPBandwidth);
FREE_STRING (media->key.type);
FREE_STRING (media->key.data);
INIT_ARRAY (media->attributes, SDPAttribute);
return RTSP_OK;
}
DEFINE_STRING_SETTER (version);
DEFINE_STRING_GETTER (version);
RTSPResult
sdp_message_set_origin (SDPMessage * msg, gchar * username, gchar * sess_id,
gchar * sess_version, gchar * nettype, gchar * addrtype, gchar * addr)
{
REPLACE_STRING (msg->origin.username, username);
REPLACE_STRING (msg->origin.sess_id, sess_id);
REPLACE_STRING (msg->origin.sess_version, sess_version);
REPLACE_STRING (msg->origin.nettype, nettype);
REPLACE_STRING (msg->origin.addrtype, addrtype);
REPLACE_STRING (msg->origin.addr, addr);
return RTSP_OK;
}
SDPOrigin *
sdp_message_get_origin (SDPMessage * msg)
{
return &msg->origin;
}
DEFINE_STRING_SETTER (session_name);
DEFINE_STRING_GETTER (session_name);
DEFINE_STRING_SETTER (information);
DEFINE_STRING_GETTER (information);
DEFINE_STRING_SETTER (uri);
DEFINE_STRING_GETTER (uri);
DEFINE_ARRAY_LEN (emails);
DEFINE_ARRAY_GETTER (email, emails, gchar *);
DEFINE_ARRAY_ADDER (email, emails, gchar *, g_strdup);
DEFINE_ARRAY_LEN (phones);
DEFINE_ARRAY_GETTER (phone, phones, gchar *);
DEFINE_ARRAY_ADDER (phone, phones, gchar *, g_strdup);
RTSPResult
sdp_message_set_connection (SDPMessage * msg, gchar * nettype, gchar * addrtype,
gchar * address, gint ttl, gint addr_number)
{
REPLACE_STRING (msg->connection.nettype, nettype);
REPLACE_STRING (msg->connection.addrtype, addrtype);
REPLACE_STRING (msg->connection.address, address);
msg->connection.ttl = ttl;
msg->connection.addr_number = addr_number;
return RTSP_OK;
}
SDPConnection *
sdp_message_get_connection (SDPMessage * msg)
{
return &msg->connection;
}
DEFINE_ARRAY_LEN (bandwidths);
DEFINE_ARRAY_P_GETTER (bandwidth, bandwidths, SDPBandwidth);
RTSPResult
sdp_message_add_bandwidth (SDPMessage * msg, gchar * bwtype, gint bandwidth)
{
SDPBandwidth bw;
bw.bwtype = g_strdup (bwtype);
bw.bandwidth = bandwidth;
g_array_append_val (msg->bandwidths, bw);
return RTSP_OK;
}
DEFINE_ARRAY_LEN (times);
DEFINE_ARRAY_P_GETTER (time, times, SDPTime);
RTSPResult
sdp_message_add_time (SDPMessage * msg, gchar * time)
{
return RTSP_OK;
}
DEFINE_ARRAY_LEN (zones);
DEFINE_ARRAY_P_GETTER (zone, zones, SDPZone);
RTSPResult
sdp_message_add_zone (SDPMessage * msg, gchar * time, gchar * typed_time)
{
SDPZone zone;
zone.time = g_strdup (time);
zone.typed_time = g_strdup (typed_time);
g_array_append_val (msg->zones, zone);
return RTSP_OK;
}
RTSPResult
sdp_message_set_key (SDPMessage * msg, gchar * type, gchar * data)
{
REPLACE_STRING (msg->key.type, type);
REPLACE_STRING (msg->key.data, data);
return RTSP_OK;
}
SDPKey *
sdp_message_get_key (SDPMessage * msg)
{
return &msg->key;
}
DEFINE_ARRAY_LEN (attributes);
DEFINE_ARRAY_P_GETTER (attribute, attributes, SDPAttribute);
gchar *
sdp_message_get_attribute_val (SDPMessage * msg, gchar * key)
{
gint i;
for (i = 0; i < msg->attributes->len; i++) {
SDPAttribute *attr;
attr = &g_array_index (msg->attributes, SDPAttribute, i);
if (!strcmp (attr->key, key))
return attr->value;
}
return NULL;
}
RTSPResult
sdp_message_add_attribute (SDPMessage * msg, gchar * key, gchar * value)
{
SDPAttribute attr;
attr.key = g_strdup (key);
attr.value = g_strdup (value);
g_array_append_val (msg->attributes, attr);
return RTSP_OK;
}
DEFINE_ARRAY_LEN (medias);
DEFINE_ARRAY_P_GETTER (media, medias, SDPMedia);
RTSPResult
sdp_message_add_media (SDPMessage * msg, SDPMedia * media)
{
gint len;
SDPMedia *nmedia;
len = msg->medias->len;
g_array_set_size (msg->medias, len + 1);
nmedia = &g_array_index (msg->medias, SDPMedia, len);
memcpy (nmedia, media, sizeof (SDPMedia));
return RTSP_OK;
}
/* media access */
RTSPResult
sdp_media_add_attribute (SDPMedia * media, gchar * key, gchar * value)
{
SDPAttribute attr;
attr.key = g_strdup (key);
attr.value = g_strdup (value);
g_array_append_val (media->attributes, attr);
return RTSP_OK;
}
RTSPResult
sdp_media_add_bandwidth (SDPMedia * media, gchar * bwtype, gint bandwidth)
{
SDPBandwidth bw;
bw.bwtype = g_strdup (bwtype);
bw.bandwidth = bandwidth;
g_array_append_val (media->bandwidths, bw);
return RTSP_OK;
}
RTSPResult
sdp_media_add_format (SDPMedia * media, gchar * format)
{
gchar *fmt;
fmt = g_strdup (format);
g_array_append_val (media->fmts, fmt);
return RTSP_OK;
}
gchar *
sdp_media_get_attribute_val (SDPMedia * media, gchar * key)
{
gint i;
for (i = 0; i < media->attributes->len; i++) {
SDPAttribute *attr;
attr = &g_array_index (media->attributes, SDPAttribute, i);
if (!strcmp (attr->key, key))
return attr->value;
}
return NULL;
}
gchar *
sdp_media_get_format (SDPMedia * media, gint i)
{
if (i >= media->fmts->len)
return NULL;
return g_array_index (media->fmts, gchar *, i);
}
static void
read_string (gchar * dest, gint size, gchar ** src)
{
gint idx;
idx = 0;
/* skip spaces */
while (g_ascii_isspace (**src))
(*src)++;
while (!g_ascii_isspace (**src) && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
static void
read_string_del (gchar * dest, gint size, gchar del, gchar ** src)
{
gint idx;
idx = 0;
/* skip spaces */
while (g_ascii_isspace (**src))
(*src)++;
while (**src != del && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
enum
{
SDP_SESSION,
SDP_MEDIA,
};
typedef struct
{
gint state;
SDPMessage *msg;
SDPMedia *media;
} SDPContext;
static gboolean
sdp_parse_line (SDPContext * c, gchar type, gchar * buffer)
{
gchar str[4096];
gchar *p = buffer;
#define READ_STRING(field) read_string (str, sizeof(str), &p);REPLACE_STRING (field, str);
#define READ_INT(field) read_string (str, sizeof(str), &p);field = atoi(str);
switch (type) {
case 'v':
if (buffer[0] != '0')
g_warning ("wrong SDP version");
sdp_message_set_version (c->msg, buffer);
break;
case 'o':
READ_STRING (c->msg->origin.username);
READ_STRING (c->msg->origin.sess_id);
READ_STRING (c->msg->origin.sess_version);
READ_STRING (c->msg->origin.nettype);
READ_STRING (c->msg->origin.addrtype);
READ_STRING (c->msg->origin.addr);
break;
case 's':
REPLACE_STRING (c->msg->session_name, buffer);
break;
case 'i':
if (c->state == SDP_SESSION) {
REPLACE_STRING (c->msg->information, buffer);
} else {
REPLACE_STRING (c->media->information, buffer);
}
break;
case 'u':
REPLACE_STRING (c->msg->uri, buffer);
break;
case 'e':
sdp_message_add_email (c->msg, buffer);
break;
case 'p':
sdp_message_add_phone (c->msg, buffer);
break;
case 'c':
READ_STRING (c->msg->connection.nettype);
READ_STRING (c->msg->connection.addrtype);
READ_STRING (c->msg->connection.address);
READ_INT (c->msg->connection.ttl);
READ_INT (c->msg->connection.addr_number);
break;
case 'b':
{
gchar str2[4096];
read_string_del (str, sizeof (str), ':', &p);
read_string (str2, sizeof (str2), &p);
if (c->state == SDP_SESSION)
sdp_message_add_bandwidth (c->msg, str, atoi (str2));
else
sdp_media_add_bandwidth (c->media, str, atoi (str2));
break;
}
case 't':
break;
case 'k':
break;
case 'a':
read_string_del (str, sizeof (str), ':', &p);
if (p != '\0')
p++;
if (c->state == SDP_SESSION)
sdp_message_add_attribute (c->msg, str, p);
else
sdp_media_add_attribute (c->media, str, p);
break;
case 'm':
{
gchar *slash;
SDPMedia nmedia = { 0 };
c->state = SDP_MEDIA;
sdp_media_init (&nmedia);
READ_STRING (nmedia.media);
read_string (str, sizeof (str), &p);
slash = g_strrstr (str, "/");
if (slash) {
*slash = '\0';
nmedia.port = atoi (str);
nmedia.num_ports = atoi (slash + 1);
} else {
nmedia.port = atoi (str);
nmedia.num_ports = -1;
}
READ_STRING (nmedia.proto);
do {
read_string (str, sizeof (str), &p);
sdp_media_add_format (&nmedia, str);
} while (*p != '\0');
sdp_message_add_media (c->msg, &nmedia);
c->media =
&g_array_index (c->msg->medias, SDPMedia, c->msg->medias->len - 1);
break;
}
default:
break;
}
return TRUE;
}
RTSPResult
sdp_message_parse_buffer (guint8 * data, guint size, SDPMessage * msg)
{
gchar *p;
SDPContext c;
gchar type;
gchar buffer[4096];
gint idx = 0;
if (msg == NULL || data == NULL || size == 0)
return RTSP_EINVAL;
c.state = SDP_SESSION;
c.msg = msg;
c.media = NULL;
p = (gchar *) data;
while (TRUE) {
while (g_ascii_isspace (*p))
p++;
type = *p++;
if (type == '\0')
break;
if (*p != '=')
goto line_done;
p++;
idx = 0;
while (*p != '\n' && *p != '\r' && *p != '\0') {
if (idx < sizeof (buffer) - 1)
buffer[idx++] = *p;
p++;
}
buffer[idx] = '\0';
sdp_parse_line (&c, type, buffer);
line_done:
while (*p != '\n' && *p != '\0')
p++;
if (*p == '\n')
p++;
}
return RTSP_OK;
}
static void
print_media (SDPMedia * media)
{
g_print (" media: '%s'\n", media->media);
g_print (" port: '%d'\n", media->port);
g_print (" num_ports: '%d'\n", media->num_ports);
g_print (" proto: '%s'\n", media->proto);
if (media->fmts->len > 0) {
gint i;
g_print (" formats:\n");
for (i = 0; i < media->fmts->len; i++) {
g_print (" format '%s'\n", g_array_index (media->fmts, gchar *, i));
}
}
g_print (" information: '%s'\n", media->information);
g_print (" key:\n");
g_print (" type: '%s'\n", media->key.type);
g_print (" data: '%s'\n", media->key.data);
if (media->attributes->len > 0) {
gint i;
g_print (" attributes:\n");
for (i = 0; i < media->attributes->len; i++) {
SDPAttribute *attr = &g_array_index (media->attributes, SDPAttribute, i);
g_print (" attribute '%s' : '%s'\n", attr->key, attr->value);
}
}
}
RTSPResult
sdp_message_dump (SDPMessage * msg)
{
if (msg == NULL)
return RTSP_EINVAL;
g_print ("sdp packet %p:\n", msg);
g_print (" version: '%s'\n", msg->version);
g_print (" origin:\n");
g_print (" username: '%s'\n", msg->origin.username);
g_print (" sess_id: '%s'\n", msg->origin.sess_id);
g_print (" sess_version: '%s'\n", msg->origin.sess_version);
g_print (" nettype: '%s'\n", msg->origin.nettype);
g_print (" addrtype: '%s'\n", msg->origin.addrtype);
g_print (" addr: '%s'\n", msg->origin.addr);
g_print (" session_name: '%s'\n", msg->session_name);
g_print (" information: '%s'\n", msg->information);
g_print (" uri: '%s'\n", msg->uri);
if (msg->emails->len > 0) {
gint i;
g_print (" emails:\n");
for (i = 0; i < msg->emails->len; i++) {
g_print (" email '%s'\n", g_array_index (msg->emails, gchar *, i));
}
}
if (msg->phones->len > 0) {
gint i;
g_print (" phones:\n");
for (i = 0; i < msg->phones->len; i++) {
g_print (" phone '%s'\n", g_array_index (msg->phones, gchar *, i));
}
}
g_print (" connection:\n");
g_print (" nettype: '%s'\n", msg->connection.nettype);
g_print (" addrtype: '%s'\n", msg->connection.addrtype);
g_print (" address: '%s'\n", msg->connection.address);
g_print (" ttl: '%d'\n", msg->connection.ttl);
g_print (" addr_number: '%d'\n", msg->connection.addr_number);
g_print (" key:\n");
g_print (" type: '%s'\n", msg->key.type);
g_print (" data: '%s'\n", msg->key.data);
if (msg->attributes->len > 0) {
gint i;
g_print (" attributes:\n");
for (i = 0; i < msg->attributes->len; i++) {
SDPAttribute *attr = &g_array_index (msg->attributes, SDPAttribute, i);
g_print (" attribute '%s' : '%s'\n", attr->key, attr->value);
}
}
if (msg->medias->len > 0) {
gint i;
g_print (" medias:\n");
for (i = 0; i < msg->medias->len; i++) {
g_print (" media %d:\n", i);
print_media (&g_array_index (msg->medias, SDPMedia, i));
}
}
return RTSP_OK;
}