Beispiel #1
0
int DecodeUDP(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
{
    SCPerfCounterIncr(dtv->counter_udp, tv->sc_perf_pca);

    if (unlikely(DecodeUDPPacket(tv, p,pkt,len) < 0)) {
        p->udph = NULL;
        return TM_ECODE_FAILED;
    }

    SCLogDebug("UDP sp: %" PRIu32 " -> dp: %" PRIu32 " - HLEN: %" PRIu32 " LEN: %" PRIu32 "",
        UDP_GET_SRC_PORT(p), UDP_GET_DST_PORT(p), UDP_HEADER_LEN, p->payload_len);

    if (unlikely(DecodeTeredo(tv, dtv, p, p->payload, p->payload_len, pq) == TM_ECODE_OK)) {
        /* Here we have a Teredo packet and don't need to handle app
         * layer */
        FlowHandlePacket(tv, p);
        return TM_ECODE_OK;
    }

    /* Flow is an integral part of us */
    FlowHandlePacket(tv, p);

    /* handle the app layer part of the UDP packet payload */
    if (unlikely(p->flow != NULL)) {
        AppLayerHandleUdp(&dtv->udp_dp_ctx, p->flow, p);
    }

    return TM_ECODE_OK;
}
Beispiel #2
0
/**
 * \brief   Log the dropped packets in netfilter format when engine is running
 *          in inline mode
 *
 * \param tv    Pointer the current thread variables
 * \param p     Pointer the packet which is being logged
 * \param data  Pointer to the droplog struct
 *
 * \return return TM_EODE_OK on success
 */
static int LogDropLogNetFilter (ThreadVars *tv, const Packet *p, void *data)
{
    LogDropLogThread *dlt = (LogDropLogThread *)data;
    uint16_t proto = 0;
    char timebuf[64];

    CreateTimeString(&p->ts, timebuf, sizeof(timebuf));

    SCMutexLock(&dlt->file_ctx->fp_mutex);

    if (dlt->file_ctx->rotation_flag) {
        dlt->file_ctx->rotation_flag  = 0;
        if (SCConfLogReopen(dlt->file_ctx) != 0) {
            /* Rotation failed, error already logged. */
            SCMutexUnlock(&dlt->file_ctx->fp_mutex);
            return TM_ECODE_FAILED;
        }
    }

    char srcip[46] = "";
    char dstip[46] = "";

    if (PKT_IS_IPV4(p)) {
        PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, 16);
        PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, 16);
        fprintf(dlt->file_ctx->fp, "%s: IN= OUT= SRC=%s DST=%s LEN=%"PRIu16" "
                "TOS=0x%02"PRIu8" TTL=%"PRIu8" ID=%"PRIu16"", timebuf,
                srcip, dstip, IPV4_GET_IPLEN(p), IPV4_GET_IPTOS(p),
                IPV4_GET_IPTTL(p), IPV4_GET_IPID(p));
        proto = IPV4_GET_IPPROTO(p);
    } else if (PKT_IS_IPV6(p)) {
        PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p), srcip, sizeof(srcip));
        PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p), dstip, sizeof(dstip));
        fprintf(dlt->file_ctx->fp, "%s: IN= OUT= SRC=%s DST=%s LEN=%"PRIu16""
                " TC=%"PRIu32" HOPLIMIT=%"PRIu8" FLOWLBL=%"PRIu32"", timebuf,
                srcip, dstip, IPV6_GET_PLEN(p), IPV6_GET_CLASS(p),
                IPV6_GET_HLIM(p), IPV6_GET_FLOW(p));
        proto = IPV6_GET_L4PROTO(p);
    }

    if (SCProtoNameValid(proto) == TRUE) {
        fprintf(dlt->file_ctx->fp, " PROTO=%s",known_proto[proto]);
    } else {
        fprintf(dlt->file_ctx->fp, " PROTO=%03"PRIu16"",proto);
    }

    switch (proto) {
        case IPPROTO_TCP:
            if (PKT_IS_TCP(p)) {
                fprintf(dlt->file_ctx->fp, " SPT=%"PRIu16" DPT=%"PRIu16" "
                        "SEQ=%"PRIu32" ACK=%"PRIu32" WINDOW=%"PRIu32"",
                        GET_TCP_SRC_PORT(p), GET_TCP_DST_PORT(p), TCP_GET_SEQ(p),
                        TCP_GET_ACK(p), TCP_GET_WINDOW(p));
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_SYN(p) ? " SYN" : "");
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_ACK(p) ? " ACK" : "");
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_PUSH(p) ? " PSH" : "");
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_RST(p) ? " RST" : "");
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_URG(p) ? " URG" : "");
                fprintf(dlt->file_ctx->fp, TCP_ISSET_FLAG_FIN(p) ? " FIN" : "");
                fprintf(dlt->file_ctx->fp, " RES=0x%02"PRIu8" URGP=%"PRIu16"",
                        TCP_GET_RAW_X2(p->tcph), TCP_GET_URG_POINTER(p));
            }
            break;
        case IPPROTO_UDP:
            if (PKT_IS_UDP(p)) {
                fprintf(dlt->file_ctx->fp, " SPT=%"PRIu16" DPT=%"PRIu16""
                        " LEN=%"PRIu16"", UDP_GET_SRC_PORT(p),
                        UDP_GET_DST_PORT(p), UDP_GET_LEN(p));
            }
            break;
        case IPPROTO_ICMP:
            if (PKT_IS_ICMPV4(p)) {
                fprintf(dlt->file_ctx->fp, " TYPE=%"PRIu8" CODE=%"PRIu8""
                        " ID=%"PRIu16" SEQ=%"PRIu16"", ICMPV4_GET_TYPE(p),
                        ICMPV4_GET_CODE(p), ICMPV4_GET_ID(p), ICMPV4_GET_SEQ(p));
            } else if (PKT_IS_ICMPV6(p)) {
                fprintf(dlt->file_ctx->fp, " TYPE=%"PRIu8" CODE=%"PRIu8""
                        " ID=%"PRIu16" SEQ=%"PRIu16"", ICMPV6_GET_TYPE(p),
                        ICMPV6_GET_CODE(p), ICMPV6_GET_ID(p), ICMPV6_GET_SEQ(p));
            }
            break;
        default:
            fprintf(dlt->file_ctx->fp," Unknown protocol");
    }

    fprintf(dlt->file_ctx->fp,"\n");

    fflush(dlt->file_ctx->fp);

    dlt->drop_cnt++;
    SCMutexUnlock(&dlt->file_ctx->fp_mutex);

    return TM_ECODE_OK;

}