WAPEvent *unpack_wdp_datagram_real(WAPEvent *datagram)
{
WTP_PDU *pdu;
WAPEvent *event;
Octstr *data;
gw_assert(datagram->type == T_DUnitdata_Ind);
data = datagram->u.T_DUnitdata_Ind.user_data;
if (truncated_datagram(datagram)) {
warning(0, "WTP: got a truncated datagram, ignoring");
return NULL;
}
pdu = wtp_pdu_unpack(data);
/*
* wtp_pdu_unpack returned NULL, we have send here a rcv error event,
* but now we silently drop the packet. Because we can't figure out
* in the pack_error() call if the TID value and hence the direction
* inditation is really for initiator or responder.
*/
if (pdu == NULL) {
error(0, "WTP: cannot unpack pdu, dropping packet.");
return NULL;
}
event = NULL;
switch (pdu->type) {
case Invoke:
event = unpack_invoke(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
/* if an WTP initiator gets invoke, it would be an illegal pdu. */
if (!wtp_event_is_for_responder(event)){
debug("wap.wtp", 0, "WTP: Invoke when initiator. Message was");
wap_event_destroy(event);
event = pack_error(datagram);
}
break;
case Segmented_invoke:
event = unpack_segmented_invoke(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Result:
event = unpack_result(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
/* if an WTP responder gets result, it would be an illegal pdu. */
if (wtp_event_is_for_responder(event)){
debug("wap.wtp", 0, "WTP: Result when responder. Message was");
wap_event_destroy(event);
event = pack_error(datagram);
}
break;
case Ack:
event = unpack_ack(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Negative_ack:
event = unpack_negative_ack(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Abort:
event = unpack_abort(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
default:
event = pack_error(datagram);
debug("wap.wtp", 0, "WTP: Unhandled PDU type. Message was");
wap_event_dump(datagram);
return event;
}
wtp_pdu_destroy(pdu);
wap_event_assert(event);
return event;
}
WAPEvent *unpack_wdp_datagram_real(WAPEvent *datagram)
{
WTP_PDU *pdu;
WAPEvent *event;
Octstr *data;
gw_assert(datagram->type == T_DUnitdata_Ind);
data = datagram->u.T_DUnitdata_Ind.user_data;
if (truncated_datagram(datagram)) {
warning(0, "WTP: got a truncated datagram, ignoring");
return NULL;
}
pdu = wtp_pdu_unpack(data);
/*
* Wtp_pdu_unpack returned NULL, we build a rcv error event.
*/
if (pdu == NULL) {
error(0, "WTP: cannot unpack pdu, creating an error pdu");
event = pack_error(datagram);
return event;
}
event = NULL;
switch (pdu->type) {
case Invoke:
event = unpack_invoke(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
/* if an WTP initiator gets invoke, it would be an illegal pdu. */
if (!wtp_event_is_for_responder(event)){
debug("wap.wtp", 0, "WTP: Invoke when initiator. Message was");
wap_event_destroy(event);
event = pack_error(datagram);
}
break;
case Segmented_invoke:
event = unpack_segmented_invoke(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Result:
event = unpack_result(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
/* if an WTP responder gets result, it would be an illegal pdu. */
if (wtp_event_is_for_responder(event)){
debug("wap.wtp", 0, "WTP: Result when responder. Message was");
wap_event_destroy(event);
event = pack_error(datagram);
}
break;
case Ack:
event = unpack_ack(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Negative_ack:
event = unpack_negative_ack(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
case Abort:
event = unpack_abort(pdu, datagram->u.T_DUnitdata_Ind.addr_tuple);
break;
default:
event = pack_error(datagram);
debug("wap.wtp", 0, "WTP: Unhandled PDU type. Message was");
wap_event_dump(datagram);
return event;
}
wtp_pdu_destroy(pdu);
wap_event_assert(event);
return event;
}
