int SDP_SetConnection(
SDP_Description * description,
const char * network_type,
const char * address_type,
const char * address,
int ttl,
int total_addresses)
{
SDP_AssertNotNull(description);
if (description->connection == NULL)
{
description->connection = SDP_NewConnection();
if (description->connection == NULL)
return SDP_FAILURE;
}
ENSURE_COPY_TO_STR(
description->connection->network_type, network_type
);
ENSURE_COPY_TO_STR(
description->connection->address_type, address_type
);
ENSURE_COPY_TO_STR(
description->connection->address, address
);
description->connection->ttl = ttl;
description->connection->total_addresses = total_addresses;
return SDP_SUCCESS;
}
M4Err SDP_Parse(SDPInfo *sdp, char *sdp_text, u32 text_size)
{
SDPBandwidth *bw;
SDPConnection *conn;
SDPMedia *media;
SDPTiming *timing;
u32 i;
s32 pos, LinePos;
char LineBuf[3000], comp[3000];
media = NULL;
timing = NULL;
if (!sdp) return M4BadParam;
//Clean SDP info
SDP_Reset(sdp);
LinePos = 0;
while (1) {
LinePos = SP_GetOneLine(sdp_text, LinePos, text_size, LineBuf, 3000);
if (LinePos <= 0) break;
if (!strcmp(LineBuf, "\r\n") || !strcmp(LineBuf, "\n") || !strcmp(LineBuf, "\r")) continue;
switch (LineBuf[0]) {
case 'v':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->Version = atoi(comp);
break;
case 'o':
pos = SP_GetComponent(LineBuf, 2, " \t\r\n", comp, 3000);
sdp->o_username = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
sdp->o_session_id = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
sdp->o_version = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
sdp->o_net_type = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
sdp->o_add_type = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
sdp->o_address = strdup(comp);
break;
case 's':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->s_session_name = strdup(comp);
break;
case 'i':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->i_description = strdup(comp);
break;
case 'u':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->u_uri = strdup(comp);
break;
case 'e':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->e_email = strdup(comp);
break;
case 'p':
pos = SP_GetComponent(LineBuf, 2, "\t\r\n", comp, 3000);
sdp->p_phone = strdup(comp);
break;
case 'c':
//if at session level, only 1 is allowed for all SDP
if (sdp->c_connection) break;
conn = SDP_NewConnection();
pos = SP_GetComponent(LineBuf, 2, " \t\r\n", comp, 3000);
conn->net_type = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
conn->add_type = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " /\r\n", comp, 3000);
conn->host = strdup(comp);
if (SK_IsMulticastAddress(conn->host)) {
//a valid SDP will have TTL if address is multicast
pos = SP_GetComponent(LineBuf, pos, "/\r\n", comp, 3000);
if (pos <= 0) {
SDP_DeleteConnection(conn);
break;
}
conn->TTL = atoi(comp);
//multiple address indication is only valid for media
pos = SP_GetComponent(LineBuf, pos, "/\r\n", comp, 3000);
if (pos > 0) {
if (!media) {
SDP_DeleteConnection(conn);
break;
}
conn->add_count = atoi(comp);
}
}
if (!media)
sdp->c_connection = conn;
else
ChainAddEntry(media->Connections, conn);
break;
case 'b':
pos = SP_GetComponent(LineBuf, 2, ":\r\n", comp, 3000);
if (strcmp(comp, "CT") && strcmp(comp, "AS") && (comp[0] != 'X')) break;
bw = malloc(sizeof(SDPBandwidth));
bw->name = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, ":\r\n", comp, 3000);
bw->value = atoi(comp);
if (media) {
ChainAddEntry(media->Bandwidths, bw);
} else {
ChainAddEntry(sdp->b_bandwidth, bw);
}
break;
case 't':
if (media) break;
//create a new time structure for each entry
timing = malloc(sizeof(SDPTiming));
memset(timing, 0, sizeof(SDPTiming));
pos = SP_GetComponent(LineBuf, 2, " \t\r\n", comp, 3000);
timing->StartTime = atoi(comp);
pos = SP_GetComponent(LineBuf, pos, "\r\n", comp, 3000);
timing->StopTime = atoi(comp);
ChainAddEntry(sdp->Timing, timing);
break;
case 'r':
if (media) break;
pos = SP_GetComponent(LineBuf, 2, " \t\r\n", comp, 3000);
timing->RepeatInterval = SDP_MakeSeconds(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
timing->ActiveDuration = SDP_MakeSeconds(comp);
while (1) {
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
if (pos <= 0) break;
timing->OffsetFromStart[timing->NbRepeatOffsets] = SDP_MakeSeconds(comp);
timing->NbRepeatOffsets += 1;
}
break;
case 'z':
if (media) break;
pos = 2;
while (1) {
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
if (pos <= 0) break;
timing->AdjustmentTime[timing->NbZoneOffsets] = atoi(comp);
pos = SP_GetComponent(LineBuf, pos, " \t\r\n", comp, 3000);
timing->AdjustmentOffset[timing->NbZoneOffsets] = SDP_MakeSeconds(comp);
timing->NbZoneOffsets += 1;
}
break;
case 'k':
pos = SP_GetComponent(LineBuf, 2, ":\t\r\n", comp, 3000);
if (media) {
media->k_method = strdup(comp);
} else {
sdp->k_method = strdup(comp);
}
pos = SP_GetComponent(LineBuf, pos, ":\r\n", comp, 3000);
if (pos > 0) {
if (media) {
media->k_key = strdup(comp);
} else {
sdp->k_key = strdup(comp);
}
}
break;
case 'a':
SDP_ParseAttribute(sdp, LineBuf+2, media);
break;
case 'm':
pos = SP_GetComponent(LineBuf, 2, " \t\r\n", comp, 3000);
if (strcmp(comp, "audio")
&& strcmp(comp, "data")
&& strcmp(comp, "control")
&& strcmp(comp, "video")
&& strcmp(comp, "text")
&& strcmp(comp, "application")) {
return M4ServiceError;
}
media = SDP_NewMedia();
//media type
if (!strcmp(comp, "video")) media->Type = 1;
else if (!strcmp(comp, "audio")) media->Type = 2;
else if (!strcmp(comp, "text")) media->Type = 3;
else if (!strcmp(comp, "data")) media->Type = 4;
else if (!strcmp(comp, "control")) media->Type = 5;
else media->Type = 0;
//port numbers
SP_GetComponent(LineBuf, pos, " ", comp, 3000);
if (!strstr(comp, "/")) {
pos = SP_GetComponent(LineBuf, pos, " \r\n", comp, 3000);
media->PortNumber = atoi(comp);
media->NumPorts = 0;
} else {
pos = SP_GetComponent(LineBuf, pos, " /\r\n", comp, 3000);
media->PortNumber = atoi(comp);
pos = SP_GetComponent(LineBuf, pos, " \r\n", comp, 3000);
media->NumPorts = atoi(comp);
}
//transport Profile
pos = SP_GetComponent(LineBuf, pos, " \r\n", comp, 3000);
media->Profile = strdup(comp);
pos = SP_GetComponent(LineBuf, pos, " \r\n", comp, 3000);
media->fmt_list = strdup(comp);
ChainAddEntry(sdp->media_desc, media);
break;
}
}
//finally rewrite the fmt_list for all media, and remove dynamic payloads
//from the list
for (i=0; i<ChainGetCount(sdp->media_desc); i++) {
media = ChainGetEntry(sdp->media_desc, i);
pos = 0;
LinePos = 1;
strcpy(LineBuf, "");
while (1) {
if (!media->fmt_list) break;
pos = SP_GetComponent(media->fmt_list, pos, " ", comp, 3000);
if (pos <= 0) break;
if (!SDP_IsDynamicPayload(media, comp)) {
if (!LinePos) {
strcat(LineBuf, " ");
} else {
LinePos = 0;
}
strcat(LineBuf, comp);
}
free(media->fmt_list);
media->fmt_list = NULL;
if (strlen(LineBuf)) {
media->fmt_list = strdup(LineBuf);
}
}
}
return M4OK;
}
