int DecodeTCP(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
{
StatsIncr(tv, dtv->counter_tcp);
if (unlikely(DecodeTCPPacket(tv, p,pkt,len) < 0)) {
SCLogDebug("invalid TCP packet");
p->tcph = NULL;
return TM_ECODE_FAILED;
}
#ifdef DEBUG
SCLogDebug("TCP sp: %" PRIu32 " -> dp: %" PRIu32 " - HLEN: %" PRIu32 " LEN: %" PRIu32 " %s%s%s%s%s",
GET_TCP_SRC_PORT(p), GET_TCP_DST_PORT(p), TCP_GET_HLEN(p), len,
TCP_HAS_SACKOK(p) ? "SACKOK " : "", TCP_HAS_SACK(p) ? "SACK " : "",
TCP_HAS_WSCALE(p) ? "WS " : "", TCP_HAS_TS(p) ? "TS " : "",
TCP_HAS_MSS(p) ? "MSS " : "");
#endif
/* Flow is an integral part of us */
FlowHandlePacket(tv, dtv, p);
return TM_ECODE_OK;
}
/**
* \brief Convert IP packet to an IDMEF alert (RFC 4765).
* This function stores the alert SID (description and reference),
* the payload of the packet, and pre-processed data.
*
* \return 0 if ok
*/
static int PacketToData(const Packet *p, const PacketAlert *pa, idmef_alert_t *alert, AlertPreludeCtx *ctx)
{
SCEnter();
if (unlikely(p == NULL))
SCReturnInt(0);
AddIntData(alert, "snort_rule_sid", pa->s->id);
AddIntData(alert, "snort_rule_rev", pa->s->rev);
if (ctx->log_packet_header) {
if ( PKT_IS_IPV4(p) )
PacketToDataV4(p, pa, alert);
else if ( PKT_IS_IPV6(p) )
PacketToDataV6(p, pa, alert);
if ( PKT_IS_TCP(p) ) {
AddIntData(alert, "tcp_seq", TCP_GET_SEQ(p));
AddIntData(alert, "tcp_ack", TCP_GET_ACK(p));
AddIntData(alert, "tcp_off", TCP_GET_OFFSET(p));
AddIntData(alert, "tcp_res", TCP_GET_X2(p));
AddIntData(alert, "tcp_flags", TCP_GET_FLAGS(p));
AddIntData(alert, "tcp_win", TCP_GET_WINDOW(p));
AddIntData(alert, "tcp_sum", TCP_GET_SUM(p));
AddIntData(alert, "tcp_urp", TCP_GET_URG_POINTER(p));
if (p->tcpvars.ts_val != 0) {
AddIntData(alert, "tcp_tsval", TCP_GET_TSVAL(p));
}
if (p->tcpvars.ts_ecr != 0) {
AddIntData(alert, "tcp_tsecr", TCP_GET_TSECR(p));
}
if (p->tcph != NULL) {
AddIntData(alert, "tcp_wscale", TCP_GET_WSCALE(p));
}
if (TCP_HAS_SACKOK(p)) {
AddIntData(alert, "tcp_sackok", TCP_GET_SACKOK(p));
}
if (TCP_HAS_SACK(p)) {
AddIntData(alert, "tcp_sack_cnt", TCP_GET_SACK_CNT(p));
}
AddIntData(alert, "tcp_hlen", TCP_GET_HLEN(p));
}
else if ( PKT_IS_UDP(p) ) {
AddIntData(alert, "udp_len", UDP_GET_LEN(p));
AddIntData(alert, "udp_sum", UDP_GET_SUM(p));
}
else if ( PKT_IS_ICMPV4(p) ) {
AddIntData(alert, "icmp_type", ICMPV4_GET_TYPE(p));
AddIntData(alert, "icmp_code", ICMPV4_GET_CODE(p));
AddIntData(alert, "icmp_sum", ICMPV4_GET_RAW_CSUM(p));
}
else if ( PKT_IS_ICMPV6(p) ) {
AddIntData(alert, "icmp_type", ICMPV6_GET_TYPE(p));
AddIntData(alert, "icmp_code", ICMPV6_GET_CODE(p));
AddIntData(alert, "icmp_csum", ICMPV6_GET_RAW_CSUM(p));
}
}
if (ctx->log_packet_content)
AddByteData(alert, "payload", p->payload, p->payload_len);
SCReturnInt(0);
}
