static AthenaTransportLink *
_newLink(AthenaTransportLink *athenaTransportLink, _UDPLinkData *newLinkData)
{
// Accept a new tunnel connection.
// Clone a new link from the current listener.
const char *derivedLinkName = _createNameFromLinkData(&newLinkData->link);
AthenaTransportLink *newTransportLink = athenaTransportLink_Clone(athenaTransportLink,
derivedLinkName,
_UDPSend,
_UDPReceiveProxy,
_UDPClose);
if (newTransportLink == NULL) {
parcLog_Error(athenaTransportLink_GetLogger(athenaTransportLink),
"athenaTransportLink_Clone failed");
parcMemory_Deallocate(&derivedLinkName);
_UDPLinkData_Destroy(&newLinkData);
return NULL;
}
_setConnectLinkState(newTransportLink, newLinkData);
// Send the new link up to be added.
int result = athenaTransportLink_AddLink(athenaTransportLink, newTransportLink);
if (result == -1) {
parcLog_Error(athenaTransportLink_GetLogger(athenaTransportLink),
"athenaTransportLink_AddLink failed: %s", strerror(errno));
_UDPLinkData_Destroy(&newLinkData);
athenaTransportLink_Release(&newTransportLink);
} else {
parcLog_Info(athenaTransportLink_GetLogger(athenaTransportLink),
"new link accepted by %s: %s %s",
athenaTransportLink_GetName(athenaTransportLink), derivedLinkName,
athenaTransportLink_IsNotLocal(athenaTransportLink) ? "" : "(Local)");
}
parcMemory_Deallocate(&derivedLinkName);
// Could pass a message back here regarding the new link.
return newTransportLink;
}
//
// Open a UDP point to point connection.
//
static AthenaTransportLink *
_UDPOpenConnection(AthenaTransportLinkModule *athenaTransportLinkModule, const char *linkName, struct sockaddr_in *source, struct sockaddr_in *destination, size_t mtu)
{
const char *derivedLinkName;
_UDPLinkData *linkData = _UDPLinkData_Create();
linkData->link.peerAddress = *((struct sockaddr_in *) destination);
linkData->link.peerAddressLength = sizeof(struct sockaddr_in);
linkData->link.mtu = mtu;
linkData->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (linkData->fd < 0) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule), "socket error (%s)", strerror(errno));
_UDPLinkData_Destroy(&linkData);
return NULL;
}
int result = _setSocketOptions(athenaTransportLinkModule, linkData->fd);
if (result) {
close(linkData->fd);
_UDPLinkData_Destroy(&linkData);
return NULL;
}
// bind the local endpoint so we can know our allocated port if it was wildcarded
result = bind(linkData->fd, (struct sockaddr *) source, sizeof(struct sockaddr_in));
if (result) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"bind error (%s)", strerror(errno));
close(linkData->fd);
_UDPLinkData_Destroy(&linkData);
return NULL;
}
// Retrieve the local endpoint data, used to create the derived name.
linkData->link.myAddressLength = sizeof(struct sockaddr_in);
result = getsockname(linkData->fd, (struct sockaddr *) &linkData->link.myAddress, &linkData->link.myAddressLength);
if (result != 0) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Failed to obtain endpoint information from getsockname.");
_UDPLinkData_Destroy(&linkData);
return NULL;
}
derivedLinkName = _createNameFromLinkData(&linkData->link);
if (linkName == NULL) {
linkName = derivedLinkName;
}
AthenaTransportLink *athenaTransportLink = athenaTransportLink_Create(linkName,
_UDPSend,
_UDPReceive,
_UDPClose);
if (athenaTransportLink == NULL) {
parcLog_Error(athenaTransportLink_GetLogger(athenaTransportLink),
"athenaTransportLink_Create failed");
parcMemory_Deallocate(&derivedLinkName);
_UDPLinkData_Destroy(&linkData);
return NULL;
}
_setConnectLinkState(athenaTransportLink, linkData);
// Enable Send? XXX
athenaTransportLink_SetEvent(athenaTransportLink, AthenaTransportLinkEvent_Send);
parcLog_Info(athenaTransportLink_GetLogger(athenaTransportLink),
"new link established: Name=\"%s\" (%s)", linkName, derivedLinkName);
parcMemory_Deallocate(&derivedLinkName);
return athenaTransportLink;
return NULL;
}
//
// Open a point to point connection.
//
static AthenaTransportLink *
_ETHOpenConnection(AthenaTransportLinkModule *athenaTransportLinkModule, const char *linkName, const char *device, struct ether_addr *source, struct ether_addr *destination, size_t mtu)
{
const char *derivedLinkName;
_ETHLinkData *linkData = _ETHLinkData_Create();
linkData->athenaEthernet = athenaEthernet_Create(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
device, CCNX_ETHERTYPE);
if (linkData->athenaEthernet == NULL) {
_ETHLinkData_Destroy(&linkData);
return NULL;
}
// Use our default MAC address if none specified.
if (source == NULL) {
athenaEthernet_GetMAC(linkData->athenaEthernet, &(linkData->link.myAddress));
linkData->link.myAddressLength = ETHER_ADDR_LEN;
} else {
memcpy(&(linkData->link.myAddress), source, sizeof(struct ether_addr));
}
// If there's no destination specified, drop the request.
if (destination == NULL) {
_ETHLinkData_Destroy(&linkData);
return NULL;
}
// Copy the peer destination address into our link data
memcpy(&(linkData->link.peerAddress), destination, sizeof(struct ether_addr));
derivedLinkName = _createNameFromLinkData(&linkData->link, false);
if (linkName == NULL) {
linkName = derivedLinkName;
}
AthenaTransportLink *athenaTransportLink = athenaTransportLink_Create(linkName,
_ETHSend,
_ETHReceive,
_ETHClose);
if (athenaTransportLink == NULL) {
parcLog_Error(athenaTransportLink_GetLogger(athenaTransportLink),
"athenaTransportLink_Create failed");
parcMemory_Deallocate(&derivedLinkName);
_ETHLinkData_Destroy(&linkData);
return NULL;
}
_setConnectLinkState(athenaTransportLink, linkData);
// Enable Sends
athenaTransportLink_SetEvent(athenaTransportLink, AthenaTransportLinkEvent_Send);
parcLog_Info(athenaTransportLink_GetLogger(athenaTransportLink),
"new link established: Name=\"%s\" (%s)", linkName, derivedLinkName);
parcMemory_Deallocate(&derivedLinkName);
return athenaTransportLink;
return NULL;
}
