/**
* \brief Decode a packet coming from NFQ
*/
TmEcode DecodeNFQ(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
{
IPV4Hdr *ip4h = (IPV4Hdr *)GET_PKT_DATA(p);
IPV6Hdr *ip6h = (IPV6Hdr *)GET_PKT_DATA(p);
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
/* XXX HACK: flow timeout can call us for injected pseudo packets
* see bug: https://redmine.openinfosecfoundation.org/issues/1107 */
if (PKT_IS_PSEUDOPKT(p))
return TM_ECODE_OK;
DecodeUpdatePacketCounters(tv, dtv, p);
if (IPV4_GET_RAW_VER(ip4h) == 4) {
SCLogDebug("IPv4 packet");
DecodeIPV4(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
} else if(IPV6_GET_RAW_VER(ip6h) == 6) {
SCLogDebug("IPv6 packet");
DecodeIPV6(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
} else {
SCLogDebug("packet unsupported by NFQ, first byte: %02x", *GET_PKT_DATA(p));
}
PacketDecodeFinalize(tv, dtv, p);
return TM_ECODE_OK;
}
/**
* \brief This function passes off to link type decoders.
*
* DecodeErfDag reads packets from the PacketQueue and passes
* them off to the proper link type decoder.
*
* \param t pointer to ThreadVars
* \param p pointer to the current packet
* \param data pointer that gets cast into PcapThreadVars for ptv
* \param pq pointer to the current PacketQueue
*/
TmEcode
DecodeErfDag(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq,
PacketQueue *postpq)
{
SCEnter();
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
/* XXX HACK: flow timeout can call us for injected pseudo packets
* see bug: https://redmine.openinfosecfoundation.org/issues/1107 */
if (p->flags & PKT_PSEUDO_STREAM_END)
return TM_ECODE_OK;
/* update counters */
DecodeUpdatePacketCounters(tv, dtv, p);
/* call the decoder */
switch(p->datalink) {
case LINKTYPE_ETHERNET:
DecodeEthernet(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
break;
default:
SCLogError(SC_ERR_DATALINK_UNIMPLEMENTED,
"Error: datalink type %" PRId32
" not yet supported in module DecodeErfDag",
p->datalink);
break;
}
PacketDecodeFinalize(tv, dtv, p);
SCReturnInt(TM_ECODE_OK);
}
TmEcode DecodePcapFile(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
{
SCEnter();
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
/* XXX HACK: flow timeout can call us for injected pseudo packets
* see bug: https://redmine.openinfosecfoundation.org/issues/1107 */
if (p->flags & PKT_PSEUDO_STREAM_END)
return TM_ECODE_OK;
/* update counters */
DecodeUpdatePacketCounters(tv, dtv, p);
double curr_ts = p->ts.tv_sec + p->ts.tv_usec / 1000.0;
if (curr_ts < prev_signaled_ts || (curr_ts - prev_signaled_ts) > 60.0) {
prev_signaled_ts = curr_ts;
FlowWakeupFlowManagerThread();
}
/* update the engine time representation based on the timestamp
* of the packet. */
TimeSet(&p->ts);
/* call the decoder */
pcap_g.Decoder(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
#ifdef DEBUG
BUG_ON(p->pkt_src != PKT_SRC_WIRE && p->pkt_src != PKT_SRC_FFR);
#endif
PacketDecodeFinalize(tv, dtv, p);
SCReturnInt(TM_ECODE_OK);
}
/**
* \brief This function passes off to link type decoders.
* \todo Unit tests are needed for this module.
*
* DecodeIPFW reads packets from the PacketQueue and passes
* them off to the proper link type decoder.
*
* \param tv pointer to ThreadVars
* \param p pointer to the current packet
* \param data pointer that gets cast into IPFWThreadVars for ptv
* \param pq pointer to the PacketQueue
*/
TmEcode DecodeIPFW(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
{
IPV4Hdr *ip4h = (IPV4Hdr *)GET_PKT_DATA(p);
IPV6Hdr *ip6h = (IPV6Hdr *)GET_PKT_DATA(p);
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
SCEnter();
/* XXX HACK: flow timeout can call us for injected pseudo packets
* see bug: https://redmine.openinfosecfoundation.org/issues/1107 */
if (p->flags & PKT_PSEUDO_STREAM_END)
return TM_ECODE_OK;
/* update counters */
DecodeUpdatePacketCounters(tv, dtv, p);
/* Process IP packets */
if (IPV4_GET_RAW_VER(ip4h) == 4) {
SCLogDebug("DecodeIPFW ip4 processing");
DecodeIPV4(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
} else if(IPV6_GET_RAW_VER(ip6h) == 6) {
SCLogDebug("DecodeIPFW ip6 processing");
DecodeIPV6(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
} else {
/* We don't support anything besides IP packets for now, bridged packets? */
SCLogInfo("IPFW unknown protocol support %02x", *GET_PKT_DATA(p));
SCReturnInt(TM_ECODE_FAILED);
}
PacketDecodeFinalize(tv, dtv, p);
SCReturnInt(TM_ECODE_OK);
}