unsigned ooCallGenerateSessionID
(OOH323CallData *call, OOCapType type, char *dir)
{
unsigned sessionID=0;
if(type == OO_CAP_TYPE_AUDIO)
{
if(!ooGetLogicalChannel(call, 1, dir))
{
sessionID = 1;
}
else{
if(call->masterSlaveState == OO_MasterSlave_Master)
sessionID = call->nextSessionID++;
else{
OOTRACEDBGC4("Session id for %s channel of type audio has to be "
"provided by remote.(%s, %s)\n", dir, call->callType,
call->callToken);
sessionID = 0; /* Will be assigned by remote */
}
}
}
if(type == OO_CAP_TYPE_VIDEO)
{
if(!ooGetLogicalChannel(call, 2, dir))
{
sessionID = 2;
}
else{
if(call->masterSlaveState == OO_MasterSlave_Master)
sessionID = call->nextSessionID++;
else{
sessionID = 0; /* Will be assigned by remote */
OOTRACEDBGC4("Session id for %s channel of type video has to be "
"provided by remote.(%s, %s)\n", dir, call->callType,
call->callToken);
}
}
}
if(type == OO_CAP_TYPE_DATA)
{
if(!ooGetLogicalChannel(call, 3, dir))
{
sessionID = 3;
}
else{
if(call->masterSlaveState == OO_MasterSlave_Master)
sessionID = call->nextSessionID++;
else{
sessionID = 0; /* Will be assigned by remote */
OOTRACEDBGC4("Session id for %s channel of type data has to be "
"provided by remote.(%s, %s)\n", dir, call->callType,
call->callToken);
}
}
}
return sessionID;
}
int ooRemoveLogicalChannel(OOH323CallData *call, int ChannelNo)
{
OOLogicalChannel * temp = NULL, *prev=NULL;
if(!call->logicalChans)
{
OOTRACEERR4("ERROR:Remove Logical Channel - Channel %d not found "
"Empty channel List(%s, %s)\n", ChannelNo, call->callType,
call->callToken);
return OO_FAILED;
}
temp = call->logicalChans;
while(temp)
{
if(temp->channelNo == ChannelNo)
{
if(!prev) call->logicalChans = temp->next;
else prev->next = temp->next;
memFreePtr(call->pctxt, temp->chanCap);
memFreePtr(call->pctxt, temp);
OOTRACEDBGC4("Removed logical channel %d (%s, %s)\n", ChannelNo,
call->callType, call->callToken);
call->noOfLogicalChannels--;
return OO_OK;
}
prev = temp;
temp = temp->next;
}
OOTRACEERR4("ERROR:Remove Logical Channel - Channel %d not found "
"(%s, %s)\n", ChannelNo, call->callType, call->callToken);
return OO_FAILED;
}
int ooAddMediaInfo(OOH323CallData *call, OOMediaInfo mediaInfo)
{
OOMediaInfo *newMediaInfo=NULL;
if(!call)
{
OOTRACEERR3("Error:Invalid 'call' param for ooAddMediaInfo.(%s, %s)\n",
call->callType, call->callToken);
return OO_FAILED;
}
newMediaInfo = (OOMediaInfo*) memAlloc(call->pctxt, sizeof(OOMediaInfo));
if(!newMediaInfo)
{
OOTRACEERR3("Error:Memory - ooAddMediaInfo - newMediaInfo. "
"(%s, %s)\n", call->callType, call->callToken);
return OO_FAILED;
}
memcpy (newMediaInfo, &mediaInfo, sizeof(OOMediaInfo));
OOTRACEDBGC4("Configured mediainfo for cap %s (%s, %s)\n",
ooGetCapTypeText(mediaInfo.cap),
call->callType, call->callToken);
if(!call->mediaInfo) {
newMediaInfo->next = NULL;
call->mediaInfo = newMediaInfo;
}
else {
newMediaInfo->next = call->mediaInfo;
call->mediaInfo = newMediaInfo;
}
return OO_OK;
}
int ooClearLogicalChannel(OOH323CallData *call, int channelNo)
{
OOLogicalChannel *pLogicalChannel = NULL;
ooH323EpCapability *epCap=NULL;
OOTRACEDBGC4("Clearing logical channel number %d. (%s, %s)\n", channelNo,
call->callType, call->callToken);
pLogicalChannel = ooFindLogicalChannelByLogicalChannelNo(call,channelNo);
do { if(!pLogicalChannel)
{
OOTRACEWARN4("Logical Channel %d doesn't exist, in clearLogicalChannel."
" (%s, %s)\n",
channelNo, call->callType, call->callToken);
return OO_OK;
}
epCap = (ooH323EpCapability*) pLogicalChannel->chanCap;
if(!strcmp(pLogicalChannel->dir, "receive"))
{
if(epCap->stopReceiveChannel)
{
epCap->stopReceiveChannel(call, pLogicalChannel);
OOTRACEINFO4("Stopped Receive channel %d (%s, %s)\n",
channelNo, call->callType, call->callToken);
}
else{
OOTRACEERR4("ERROR:No callback registered for stopReceiveChannel %d "
"(%s, %s)\n", channelNo, call->callType, call->callToken);
}
}
else
{
if(pLogicalChannel->state == OO_LOGICALCHAN_ESTABLISHED)
{
if(epCap->stopTransmitChannel)
{
epCap->stopTransmitChannel(call, pLogicalChannel);
OOTRACEINFO4("Stopped Transmit channel %d (%s, %s)\n",
channelNo, call->callType, call->callToken);
}
else{
OOTRACEERR4("ERROR:No callback registered for stopTransmitChannel"
" %d (%s, %s)\n", channelNo, call->callType,
call->callToken);
}
}
}
ooRemoveLogicalChannel(call, channelNo);/* TODO: efficiency - This causes re-search of
of logical channel in the list. Can be
easily improved.*/
} while ((pLogicalChannel = ooFindLogicalChannelByLogicalChannelNo(call,channelNo)));
return OO_OK;
}
OOLogicalChannel * ooFindLogicalChannelByOLC(OOH323CallData *call,
H245OpenLogicalChannel *olc)
{
H245DataType * psDataType=NULL;
H245H2250LogicalChannelParameters * pslcp=NULL;
OOTRACEDBGC4("ooFindLogicalChannel by olc %d (%s, %s)\n",
olc->forwardLogicalChannelNumber, call->callType, call->callToken);
if(olc->m.reverseLogicalChannelParametersPresent)
{
OOTRACEDBGC3("Finding receive channel (%s,%s)\n", call->callType,
call->callToken);
psDataType = &olc->reverseLogicalChannelParameters.dataType;
/* Only H2250LogicalChannelParameters are supported */
if(olc->reverseLogicalChannelParameters.multiplexParameters.t !=
T_H245OpenLogicalChannel_reverseLogicalChannelParameters_multiplexParameters_h2250LogicalChannelParameters){
OOTRACEERR4("Error:Invalid olc %d received (%s, %s)\n",
olc->forwardLogicalChannelNumber, call->callType, call->callToken);
return NULL;
}
pslcp = olc->reverseLogicalChannelParameters.multiplexParameters.u.h2250LogicalChannelParameters;
return ooFindLogicalChannel(call, pslcp->sessionID, "receive", psDataType);
}
else{
OOTRACEDBGC3("Finding transmit channel (%s, %s)\n", call->callType,
call->callToken);
psDataType = &olc->forwardLogicalChannelParameters.dataType;
/* Only H2250LogicalChannelParameters are supported */
if(olc->forwardLogicalChannelParameters.multiplexParameters.t !=
T_H245OpenLogicalChannel_forwardLogicalChannelParameters_multiplexParameters_h2250LogicalChannelParameters)
{
OOTRACEERR4("Error:Invalid olc %d received (%s, %s)\n",
olc->forwardLogicalChannelNumber, call->callType, call->callToken);
return NULL;
}
pslcp = olc->forwardLogicalChannelParameters.multiplexParameters.u.h2250LogicalChannelParameters;
return ooFindLogicalChannel(call, pslcp->sessionID, "transmit", psDataType);
}
}
OOLogicalChannel* ooAddNewLogicalChannel(OOH323CallData *call, int channelNo,
int sessionID, char *dir,
ooH323EpCapability *epCap)
{
OOLogicalChannel *pNewChannel=NULL, *pChannel=NULL;
OOMediaInfo *pMediaInfo = NULL;
OOTRACEDBGC5("Adding new media channel for cap %d dir %s (%s, %s)\n",
epCap->cap, dir, call->callType, call->callToken);
/* Create a new logical channel entry */
pNewChannel = (OOLogicalChannel*)memAlloc(call->pctxt,
sizeof(OOLogicalChannel));
if(!pNewChannel)
{
OOTRACEERR3("ERROR:Memory - ooAddNewLogicalChannel - pNewChannel "
"(%s, %s)\n", call->callType, call->callToken);
return NULL;
}
memset(pNewChannel, 0, sizeof(OOLogicalChannel));
pNewChannel->channelNo = channelNo;
pNewChannel->sessionID = sessionID;
pNewChannel->state = OO_LOGICALCHAN_IDLE;
pNewChannel->type = epCap->capType;
/* strcpy(pNewChannel->type, type);*/
strcpy(pNewChannel->dir, dir);
pNewChannel->chanCap = epCap;
OOTRACEDBGC4("Adding new channel with cap %d (%s, %s)\n", epCap->cap,
call->callType, call->callToken);
/* As per standards, media control port should be same for all
proposed channels with same session ID. However, most applications
use same media port for transmit and receive of audio streams. Infact,
testing of OpenH323 based asterisk assumed that same ports are used.
Hence we first search for existing media ports for same session and use
them. This should take care of all cases.
*/
if(call->mediaInfo)
{
pMediaInfo = call->mediaInfo;
while(pMediaInfo)
{
if(!strcmp(pMediaInfo->dir, dir) &&
(pMediaInfo->cap == epCap->cap))
{
break;
}
pMediaInfo = pMediaInfo->next;
}
}
if(pMediaInfo)
{
OOTRACEDBGC3("Using configured media info (%s, %s)\n", call->callType,
call->callToken);
pNewChannel->localRtpPort = pMediaInfo->lMediaPort;
pNewChannel->localRtcpPort = pMediaInfo->lMediaCntrlPort;
/* If user application has not specified a specific ip and is using
multihomed mode, substitute appropriate ip.
*/
if(!strcmp(pMediaInfo->lMediaIP, "0.0.0.0"))
strcpy(pNewChannel->localIP, call->localIP);
else
strcpy(pNewChannel->localIP, pMediaInfo->lMediaIP);
}
else{
OOTRACEDBGC3("Using default media info (%s, %s)\n", call->callType,
call->callToken);
pNewChannel->localRtpPort = ooGetNextPort (OORTP);
/* Ensures that RTP port is an even one */
if((pNewChannel->localRtpPort & 1) == 1)
pNewChannel->localRtpPort = ooGetNextPort (OORTP);
pNewChannel->localRtcpPort = ooGetNextPort (OORTP);
strcpy(pNewChannel->localIP, call->localIP);
}
/* Add new channel to the list */
pNewChannel->next = NULL;
if(!call->logicalChans) {
call->logicalChans = pNewChannel;
}
else{
pChannel = call->logicalChans;
while(pChannel->next) pChannel = pChannel->next;
pChannel->next = pNewChannel;
}
/* increment logical channels */
call->noOfLogicalChannels++;
OOTRACEINFO3("Created new logical channel entry (%s, %s)\n", call->callType,
call->callToken);
return pNewChannel;
}
