TmEcode AlertDebugLogger(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
{
AlertDebugLogThread *aft = (AlertDebugLogThread *)data;
int i;
char timebuf[64];
if (p->alerts.cnt == 0)
return TM_ECODE_OK;
MemBufferReset(aft->buffer);
CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
MemBufferWriteString(aft->buffer, "+================\n"
"TIME: %s\n", timebuf);
if (p->pcap_cnt > 0) {
MemBufferWriteString(aft->buffer, "PCAP PKT NUM: %"PRIu64"\n", p->pcap_cnt);
}
char srcip[46], dstip[46];
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, sizeof(dstip));
} 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));
}
MemBufferWriteString(aft->buffer, "SRC IP: %s\n"
"DST IP: %s\n"
"PROTO: %" PRIu32 "\n",
srcip, dstip, p->proto);
if (PKT_IS_TCP(p) || PKT_IS_UDP(p)) {
MemBufferWriteString(aft->buffer, "SRC PORT: %" PRIu32 "\n"
"DST PORT: %" PRIu32 "\n",
p->sp, p->dp);
if (PKT_IS_TCP(p)) {
MemBufferWriteString(aft->buffer, "TCP SEQ: %"PRIu32"\n"
"TCP ACK: %"PRIu32"\n",
TCP_GET_SEQ(p), TCP_GET_ACK(p));
}
}
/* flow stuff */
MemBufferWriteString(aft->buffer, "FLOW: to_server: %s, "
"to_client: %s\n",
p->flowflags & FLOW_PKT_TOSERVER ? "TRUE" : "FALSE",
p->flowflags & FLOW_PKT_TOCLIENT ? "TRUE" : "FALSE");
if (p->flow != NULL) {
FLOWLOCK_RDLOCK(p->flow);
CreateTimeString(&p->flow->startts, timebuf, sizeof(timebuf));
MemBufferWriteString(aft->buffer, "FLOW Start TS: %s\n", timebuf);
#ifdef DEBUG
MemBufferWriteString(aft->buffer, "FLOW PKTS TODST: %"PRIu32"\n"
"FLOW PKTS TOSRC: %"PRIu32"\n"
"FLOW Total Bytes: %"PRIu64"\n",
p->flow->todstpktcnt, p->flow->tosrcpktcnt,
p->flow->bytecnt);
#endif
MemBufferWriteString(aft->buffer,
"FLOW IPONLY SET: TOSERVER: %s, TOCLIENT: %s\n"
"FLOW ACTION: DROP: %s, PASS %s\n"
"FLOW NOINSPECTION: PACKET: %s, PAYLOAD: %s, APP_LAYER: %s\n"
"FLOW APP_LAYER: DETECTED: %s, PROTO %"PRIu16"\n",
p->flow->flags & FLOW_TOSERVER_IPONLY_SET ? "TRUE" : "FALSE",
p->flow->flags & FLOW_TOCLIENT_IPONLY_SET ? "TRUE" : "FALSE",
p->flow->flags & FLOW_ACTION_DROP ? "TRUE" : "FALSE",
p->flow->flags & FLOW_ACTION_PASS ? "TRUE" : "FALSE",
p->flow->flags & FLOW_NOPACKET_INSPECTION ? "TRUE" : "FALSE",
p->flow->flags & FLOW_NOPAYLOAD_INSPECTION ? "TRUE" : "FALSE",
p->flow->flags & FLOW_NO_APPLAYER_INSPECTION ? "TRUE" : "FALSE",
(p->flow->alproto != ALPROTO_UNKNOWN) ? "TRUE" : "FALSE", p->flow->alproto);
AlertDebugLogFlowVars(aft, p);
AlertDebugLogFlowBits(aft, p);
FLOWLOCK_UNLOCK(p->flow);
}
AlertDebugLogPktVars(aft, p);
/* any stuff */
/* Sig details? */
MemBufferWriteString(aft->buffer,
"PACKET LEN: %" PRIu32 "\n"
"PACKET:\n",
GET_PKT_LEN(p));
PrintRawDataToBuffer(aft->buffer->buffer, &aft->buffer->offset, aft->buffer->size,
GET_PKT_DATA(p), GET_PKT_LEN(p));
MemBufferWriteString(aft->buffer, "ALERT CNT: %" PRIu32 "\n",
p->alerts.cnt);
for (i = 0; i < p->alerts.cnt; i++) {
PacketAlert *pa = &p->alerts.alerts[i];
if (unlikely(pa->s == NULL)) {
continue;
}
MemBufferWriteString(aft->buffer,
"ALERT MSG [%02d]: %s\n"
"ALERT GID [%02d]: %" PRIu32 "\n"
"ALERT SID [%02d]: %" PRIu32 "\n"
"ALERT REV [%02d]: %" PRIu32 "\n"
"ALERT CLASS [%02d]: %s\n"
"ALERT PRIO [%02d]: %" PRIu32 "\n"
"ALERT FOUND IN [%02d]: %s\n",
i, pa->s->msg,
i, pa->s->gid,
i, pa->s->id,
i, pa->s->rev,
i, pa->s->class_msg ? pa->s->class_msg : "<none>",
i, pa->s->prio,
i,
pa->flags & PACKET_ALERT_FLAG_STREAM_MATCH ? "STREAM" :
(pa->flags & PACKET_ALERT_FLAG_STATE_MATCH ? "STATE" : "PACKET"));
if (p->payload_len > 0) {
MemBufferWriteString(aft->buffer,
"PAYLOAD LEN: %" PRIu32 "\n"
"PAYLOAD:\n",
p->payload_len);
PrintRawDataToBuffer(aft->buffer->buffer, &aft->buffer->offset, aft->buffer->size,
p->payload, p->payload_len);
}
if (pa->flags & PACKET_ALERT_FLAG_STATE_MATCH ||
pa->flags & PACKET_ALERT_FLAG_STREAM_MATCH) {
/* This is an app layer or stream alert */
int ret;
uint8_t flag;
if ((! PKT_IS_TCP(p)) || p->flow == NULL ||
p->flow->protoctx == NULL) {
return TM_ECODE_OK;
}
/* IDS mode reverse the data */
/** \todo improve the order selection policy */
if (p->flowflags & FLOW_PKT_TOSERVER) {
flag = FLOW_PKT_TOCLIENT;
} else {
flag = FLOW_PKT_TOSERVER;
}
ret = StreamSegmentForEach(p, flag,
AlertDebugPrintStreamSegmentCallback,
(void *)aft);
if (ret < 0) {
return TM_ECODE_FAILED;
}
}
}
SCMutexLock(&aft->file_ctx->fp_mutex);
(void)MemBufferPrintToFPAsString(aft->buffer, aft->file_ctx->fp);
fflush(aft->file_ctx->fp);
aft->file_ctx->alerts += p->alerts.cnt;
SCMutexUnlock(&aft->file_ctx->fp_mutex);
return TM_ECODE_OK;
}
static void LogFilestoreLogCreateMetaFile(const Packet *p, const File *ff, char *base_filename, int ipver) {
if (!FileWriteMeta())
return;
char metafilename[PATH_MAX] = "";
if (snprintf(metafilename, sizeof(metafilename), "%s.meta%s", base_filename,
g_working_file_suffix) == sizeof(metafilename))
return;
FILE *fp = fopen(metafilename, "w+");
if (fp != NULL) {
char timebuf[64];
CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
fprintf(fp, "TIME: %s\n", timebuf);
if (p->pcap_cnt > 0) {
fprintf(fp, "PCAP PKT NUM: %"PRIu64"\n", p->pcap_cnt);
}
char srcip[46], dstip[46];
Port sp, dp;
switch (ipver) {
case AF_INET:
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, sizeof(dstip));
break;
case AF_INET6:
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));
break;
default:
strlcpy(srcip, "<unknown>", sizeof(srcip));
strlcpy(dstip, "<unknown>", sizeof(dstip));
break;
}
sp = p->sp;
dp = p->dp;
fprintf(fp, "SRC IP: %s\n", srcip);
fprintf(fp, "DST IP: %s\n", dstip);
fprintf(fp, "PROTO: %" PRIu32 "\n", p->proto);
if (PKT_IS_TCP(p) || PKT_IS_UDP(p)) {
fprintf(fp, "SRC PORT: %" PRIu16 "\n", sp);
fprintf(fp, "DST PORT: %" PRIu16 "\n", dp);
}
fprintf(fp, "APP PROTO: %s\n",
AppProtoToString(p->flow->alproto));
/* Only applicable to HTTP traffic */
if (p->flow->alproto == ALPROTO_HTTP) {
fprintf(fp, "HTTP URI: ");
LogFilestoreMetaGetUri(fp, p, ff);
fprintf(fp, "\n");
fprintf(fp, "HTTP HOST: ");
LogFilestoreMetaGetHost(fp, p, ff);
fprintf(fp, "\n");
fprintf(fp, "HTTP REFERER: ");
LogFilestoreMetaGetReferer(fp, p, ff);
fprintf(fp, "\n");
fprintf(fp, "HTTP USER AGENT: ");
LogFilestoreMetaGetUserAgent(fp, p, ff);
fprintf(fp, "\n");
} else if (p->flow->alproto == ALPROTO_SMTP) {
/* Only applicable to SMTP */
LogFilestoreMetaGetSmtp(fp, p, ff);
}
fprintf(fp, "FILENAME: ");
PrintRawUriFp(fp, ff->name, ff->name_len);
fprintf(fp, "\n");
fclose(fp);
}
}
/**
* \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
*
* \return return TM_EODE_OK on success
*/
static int DropLogJSON (JsonDropLogThread *aft, const Packet *p)
{
JsonDropOutputCtx *drop_ctx = aft->drop_ctx;
json_t *js = CreateJSONHeader(p, LOG_DIR_PACKET, "drop");
if (unlikely(js == NULL))
return TM_ECODE_OK;
JsonAddCommonOptions(&drop_ctx->cfg, p, p->flow, js);
json_t *djs = json_object();
if (unlikely(djs == NULL)) {
json_decref(js);
return TM_ECODE_OK;
}
/* reset */
MemBufferReset(aft->buffer);
uint16_t proto = 0;
if (PKT_IS_IPV4(p)) {
json_object_set_new(djs, "len", json_integer(IPV4_GET_IPLEN(p)));
json_object_set_new(djs, "tos", json_integer(IPV4_GET_IPTOS(p)));
json_object_set_new(djs, "ttl", json_integer(IPV4_GET_IPTTL(p)));
json_object_set_new(djs, "ipid", json_integer(IPV4_GET_IPID(p)));
proto = IPV4_GET_IPPROTO(p);
} else if (PKT_IS_IPV6(p)) {
json_object_set_new(djs, "len", json_integer(IPV6_GET_PLEN(p)));
json_object_set_new(djs, "tc", json_integer(IPV6_GET_CLASS(p)));
json_object_set_new(djs, "hoplimit", json_integer(IPV6_GET_HLIM(p)));
json_object_set_new(djs, "flowlbl", json_integer(IPV6_GET_FLOW(p)));
proto = IPV6_GET_L4PROTO(p);
}
switch (proto) {
case IPPROTO_TCP:
if (PKT_IS_TCP(p)) {
json_object_set_new(djs, "tcpseq", json_integer(TCP_GET_SEQ(p)));
json_object_set_new(djs, "tcpack", json_integer(TCP_GET_ACK(p)));
json_object_set_new(djs, "tcpwin", json_integer(TCP_GET_WINDOW(p)));
json_object_set_new(djs, "syn", TCP_ISSET_FLAG_SYN(p) ? json_true() : json_false());
json_object_set_new(djs, "ack", TCP_ISSET_FLAG_ACK(p) ? json_true() : json_false());
json_object_set_new(djs, "psh", TCP_ISSET_FLAG_PUSH(p) ? json_true() : json_false());
json_object_set_new(djs, "rst", TCP_ISSET_FLAG_RST(p) ? json_true() : json_false());
json_object_set_new(djs, "urg", TCP_ISSET_FLAG_URG(p) ? json_true() : json_false());
json_object_set_new(djs, "fin", TCP_ISSET_FLAG_FIN(p) ? json_true() : json_false());
json_object_set_new(djs, "tcpres", json_integer(TCP_GET_RAW_X2(p->tcph)));
json_object_set_new(djs, "tcpurgp", json_integer(TCP_GET_URG_POINTER(p)));
}
break;
case IPPROTO_UDP:
if (PKT_IS_UDP(p)) {
json_object_set_new(djs, "udplen", json_integer(UDP_GET_LEN(p)));
}
break;
case IPPROTO_ICMP:
if (PKT_IS_ICMPV4(p)) {
json_object_set_new(djs, "icmp_id", json_integer(ICMPV4_GET_ID(p)));
json_object_set_new(djs, "icmp_seq", json_integer(ICMPV4_GET_SEQ(p)));
} else if(PKT_IS_ICMPV6(p)) {
json_object_set_new(djs, "icmp_id", json_integer(ICMPV6_GET_ID(p)));
json_object_set_new(djs, "icmp_seq", json_integer(ICMPV6_GET_SEQ(p)));
}
break;
}
json_object_set_new(js, "drop", djs);
if (aft->drop_ctx->flags & LOG_DROP_ALERTS) {
int logged = 0;
int i;
for (i = 0; i < p->alerts.cnt; i++) {
const PacketAlert *pa = &p->alerts.alerts[i];
if (unlikely(pa->s == NULL)) {
continue;
}
if ((pa->action & (ACTION_REJECT|ACTION_REJECT_DST|ACTION_REJECT_BOTH)) ||
((pa->action & ACTION_DROP) && EngineModeIsIPS()))
{
AlertJsonHeader(NULL, p, pa, js, 0);
logged = 1;
}
}
if (logged == 0) {
if (p->alerts.drop.action != 0) {
const PacketAlert *pa = &p->alerts.drop;
AlertJsonHeader(NULL, p, pa, js, 0);
}
}
}
OutputJSONBuffer(js, aft->drop_ctx->file_ctx, &aft->buffer);
json_object_del(js, "drop");
json_object_clear(js);
json_decref(js);
return TM_ECODE_OK;
}
/**
* \brief This function is used to match packets via the eDDOS rule
*
* \param t pointer to thread vars
* \param det_ctx pointer to the pattern matcher thread
* \param p pointer to the current packet
* \param m pointer to the sigmatch that we will cast into DetectDummyData
*
* \retval 0 no match
* \retval 1 match
*/
int DetecteDDOSMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx, Packet *p, Signature *s, SigMatch *m) {
int ret = 0;
DetecteDDOSSig *dsig = (DetecteDDOSSig *) m->ctx;
DetecteDDOSData *ddata;
Host *h;
time_t t1;
double time_diff_ms;
if (PKT_IS_PSEUDOPKT(p)
|| !PKT_IS_IPV4(p)
|| p->flags & PKT_HOST_SRC_LOOKED_UP) {
return 0;
}
/* TODO: Inspect the packet contents here.
* Suricata defines a `Packet` structure in decode.h which already defines
* many useful elements -- have a look! */
h = HostGetHostFromHash(&(p->src)); // Only SRC or can DEST be used too?
p->flags |= PKT_HOST_SRC_LOOKED_UP;
if (h == NULL) {
printf("host not found!\n");
return 0;
}
ddata = (DetecteDDOSData *) h->eddos;
if (!ddata) {
/* initialize fresh dummydata */
ddata = SCMalloc(sizeof (DetecteDDOSData));
bzero(ddata, sizeof (DetecteDDOSData));
h->eddos = ddata;
}
/**
* Start counting for evaluation
*/
(ddata->cnt_packets)++;
if (PKT_IS_TCP(p)) {
//counter host
(ddata->cnt_tcp)++;
//counter global
tcp_pkts_gesamt++;
//printf("\nPakets TCP Flag: %d\n", p->tcph->th_flags);
if (p->tcph->th_flags == tcp_syn_ack_flag) {
(ddata->cnt_tcp_syn_ack)++;
tcp_syn_ack_gesamt++;
//printf("TCP_SYN_ACK");
}
if (p->tcph->th_flags == tcp_fin_ack_flag) {
(ddata->cnt_tcp_fin_ack)++;
tcp_fin_ack_gesamt++;
//printf("TCP_FIN_ACK");
}
if (p->tcph->th_flags == TH_SYN) {
(ddata->cnt_tcp_syn)++;
tcp_syn_gesamt++;
//printf("TCP_SYN");
}
}
if (PKT_IS_UDP(p)) {
(ddata->cnt_udp)++;
udp_pkt_gesamt++;
}
if (PKT_IS_ICMPV4(p) && p->icmpv4h->type == ICMP_ECHO) {
(ddata->cnt_icmp_echo_req)++;
icmp_gesamt++;
}
/**
* End Counting
*/
/**
* Start evaluation
*/
if (PKT_IS_UDP(p) || PKT_IS_TCP(p)) {
t1 = p->ts.tv_sec;
time_diff_ms = difftime(t1, ddata->PeriodStart);
if (time_diff_ms > (60)) {
/*check for alarm here*/
// abweichung vom 1:2 verhältnis SYN/ACK zu FIN/ACK
float ver_syn_ack;
float abw_syn_ack;
// verhältnis von ICMP echo req paketen zu allen paketen
float ver_echoreq_norm;
// verhältnis von udp pakten zu allen paketen
float ver_udp_norm;
if (ddata->cnt_tcp_fin_ack != 0) {
ver_syn_ack = ((float) (ddata->cnt_tcp_syn_ack) / ddata->cnt_tcp_fin_ack);
} else {
// we have syn but no syn_acks
if ((((ddata->cnt_tcp_syn - ddata->cnt_tcp_syn_ack)*2) > dsig->max_abweichung_syn_ack ) && ddata->cnt_tcp_syn > 250) {
printf("\nSYN zu SYN/ACK Host\n");
printf("\n SYN: %llu SYN/ACK: %llu \n", ddata->cnt_tcp_syn, ddata->cnt_tcp_syn_ack );
ver_syn_ack = -1;
}
ver_syn_ack = 0;
}
abw_syn_ack = (((1 / 2) - ver_syn_ack))*2;
//printf("\nSYN/ACK zu FIN/ACK Host Value: %f # SYN/ACK: %llu - FIN/ACK: %llu\n", (abw_syn_ack), ddata->cnt_tcp_syn_ack, ddata->cnt_tcp_fin_ack);
if (abw_syn_ack < 0) {
// check if abweichung größer als in signatur angegeben
if (fabs(abw_syn_ack) > dsig->max_abweichung_syn_ack) {
ret = 1;
printf("\nSYN/ACK zu FIN/ACK Host Value: %f # SYN/ACK: %llu - FIN/ACK: %llu\n", fabs(abw_syn_ack), ddata->cnt_tcp_syn_ack, ddata->cnt_tcp_fin_ack);
}
}
// verhältnis icmp echo request berechnen
ver_echoreq_norm = ((float) (ddata->cnt_icmp_echo_req) / ddata->cnt_packets)*100;
// check if ICMP echo request pakete zu viel im verhältnis zu allen
if (ver_echoreq_norm > (float) (dsig->max_icmp_echo_req_packets)) {
ret = 1;
//printf("\nICMP Host\n");
}
/**
// verhältnis udp paketen berechnen
ver_udp_norm = ((float)(ddata->cnt_udp) / ddata->cnt_packets);
// check if udp pakete zu viel im verhältnis zu allen
if ( ver_udp_norm > (float)(dsig->max_udp_packets) ) {
ret = 1;
}
*/
/**
* gesamtauswertung
*/
time_diff_ms = difftime(t1, start_time);
if (time_diff_ms > (300)) {
// auswertung udp pakete
// verhältnis udp paketen berechnen
ver_udp_norm = ((float) (udp_pkt_gesamt) / (udp_pkt_gesamt + tcp_pkts_gesamt))*100;
//printf("UDP Pakete Verhaeltnis: %f", ver_udp_norm);
// check if udp pakete zu viel im verhältnis zu allen
if (ver_udp_norm > (float) (dsig->max_verhaeltnis_udp_packets)) {
ret = 1;
//printf("\nUDP ALL\n");
}
// auswertung echo requests
ver_echoreq_norm = ((float) (icmp_gesamt) / (udp_pkt_gesamt + tcp_pkts_gesamt))*100;
if (ver_echoreq_norm > (float) (icmp_gesamt)) {
ret = 1;
printf("\nICMP ALL\n");
}
// auswertung syn/ack
if (tcp_fin_ack_gesamt != 0) {
ver_syn_ack = ((float) (tcp_syn_ack_gesamt) / tcp_fin_ack_gesamt);
} else {
// we have syn but no syn_acks
if (fabs((float)((tcp_syn_gesamt - tcp_syn_gesamt)*2)) > dsig->max_abweichung_syn_ack) {
printf("\nSYN zu SYN/ACK ALL\n");
ver_syn_ack = -1;
}
ver_syn_ack = 0;
}
abw_syn_ack = (((1 / 2) - ver_syn_ack))*2;
if (abw_syn_ack < 0) {
// check if abweichung größer als in signatur angegeben
if (fabs(abw_syn_ack) > dsig->max_abweichung_syn_ack) {
ret = 1;
printf("\nSYN/ACK zu FIN/ACK ALL\n");
}
}
// reset global counter for new interval
tcp_pkts_gesamt = 0;
udp_pkt_gesamt = 0;
tcp_fin_ack_gesamt = 0;
tcp_syn_ack_gesamt = 0;
icmp_gesamt = 0;
}
/**printf("host found, packets now %d\n", (int)(ddata->cnt_packets));
ret = (ddata->cnt_packets > dsig->max_numpackets);
*/
// reset der parameter, da neuer zeitraum beginnt
ddata->PeriodStart = p->ts.tv_sec;
ddata->cnt_icmp_echo_req = 0;
ddata->cnt_packets = 0;
ddata->cnt_tcp = 0;
ddata->cnt_tcp_fin_ack = 0;
ddata->cnt_tcp_syn_ack = 0;
ddata->cnt_udp = 0;
} else {
ret = 0;
}
}
/**
* End of evaluation
*/
//printf("\nHost: %d - %d\n", (int)h, ddata->cnt_packets);
/**
printf("#################################\n");
printf("Host: %d\n",(int)h);
printf("\n TCP-SYN: %d \n", ddata->cnt_tcp_syn);
printf("\n TCP-ACK: %d \n", ddata->cnt_tcp_ack);
printf("\n Packets gesamt: %d \n", ddata->cnt_packets);
printf("\n Packets TCP gesamt: %d \n", ddata->cnt_tcp);
printf("\n Packets UDP gesamt: %d \n", ddata->cnt_udp);
printf("\n ICMP ECHO REQUEST Packets: %d \n", ddata->cnt_icmp_echo_req);
printf("#################################\n");
printf("\n\nTCP Gesamt: %llu\n",tcp_pkts_gesamt);
printf("UDP Gesamt: %llu\n",udp_pkt_gesamt);
printf("SYN: %llu\n",tcp_syn_gesamt);
printf("ICMP: %llu\n",icmp_gesamt);
printf("SYN_ACK gesamt %d\n",(int)tcp_syn_ack_gesamt);
printf("FIN_ACK_gesamt %d\n\n",(int)tcp_fin_ack_gesamt);
*/
HostRelease(h);
return ret;
}
/**
* \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;
}
/**
* \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);
}
/**
* \internal
* \brief Write meta data on a single line json record
*/
static void LogFileWriteJsonRecord(LogFileLogThread *aft, const Packet *p, const File *ff, int ipver)
{
SCMutexLock(&aft->file_ctx->fp_mutex);
/* As writes are done via the LogFileCtx, check for rotation here. */
if (aft->file_ctx->rotation_flag) {
aft->file_ctx->rotation_flag = 0;
if (SCConfLogReopen(aft->file_ctx) != 0) {
SCLogWarning(SC_ERR_FOPEN, "Failed to re-open log file. "
"Logging for this module will be disabled.");
}
}
/* Bail early if no file pointer to write to (in the unlikely
* event file rotation failed. */
if (aft->file_ctx->fp == NULL) {
SCMutexUnlock(&aft->file_ctx->fp_mutex);
return;
}
FILE *fp = aft->file_ctx->fp;
char timebuf[64];
AppProto alproto = FlowGetAppProtocol(p->flow);
CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
fprintf(fp, "{ ");
if (ff->file_id > 0)
fprintf(fp, "\"id\": %u, ", ff->file_id);
fprintf(fp, "\"timestamp\": \"");
PrintRawJsonFp(fp, (uint8_t *)timebuf, strlen(timebuf));
fprintf(fp, "\", ");
if (p->pcap_cnt > 0) {
fprintf(fp, "\"pcap_pkt_num\": %"PRIu64", ", p->pcap_cnt);
}
fprintf(fp, "\"ipver\": %d, ", ipver == AF_INET ? 4 : 6);
char srcip[46], dstip[46];
Port sp, dp;
switch (ipver) {
case AF_INET:
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, sizeof(dstip));
break;
case AF_INET6:
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));
break;
default:
strlcpy(srcip, "<unknown>", sizeof(srcip));
strlcpy(dstip, "<unknown>", sizeof(dstip));
break;
}
sp = p->sp;
dp = p->dp;
fprintf(fp, "\"srcip\": \"%s\", ", srcip);
fprintf(fp, "\"dstip\": \"%s\", ", dstip);
fprintf(fp, "\"protocol\": %" PRIu32 ", ", p->proto);
if (PKT_IS_TCP(p) || PKT_IS_UDP(p)) {
fprintf(fp, "\"sp\": %" PRIu16 ", ", sp);
fprintf(fp, "\"dp\": %" PRIu16 ", ", dp);
}
if (alproto == ALPROTO_HTTP) {
fprintf(fp, "\"http_uri\": \"");
LogFileMetaGetUri(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_host\": \"");
LogFileMetaGetHost(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_referer\": \"");
LogFileMetaGetReferer(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_user_agent\": \"");
LogFileMetaGetUserAgent(fp, p, ff);
fprintf(fp, "\", ");
} else if (p->flow->alproto == ALPROTO_SMTP) {
/* Only applicable to SMTP */
LogFileMetaGetSmtp(fp, p, ff);
}
fprintf(fp, "\"filename\": \"");
PrintRawJsonFp(fp, ff->name, ff->name_len);
fprintf(fp, "\", ");
fprintf(fp, "\"magic\": \"");
if (ff->magic) {
PrintRawJsonFp(fp, (uint8_t *)ff->magic, strlen(ff->magic));
} else {
fprintf(fp, "unknown");
}
fprintf(fp, "\", ");
switch (ff->state) {
case FILE_STATE_CLOSED:
fprintf(fp, "\"state\": \"CLOSED\", ");
#ifdef HAVE_NSS
if (ff->flags & FILE_MD5) {
fprintf(fp, "\"md5\": \"");
size_t x;
for (x = 0; x < sizeof(ff->md5); x++) {
fprintf(fp, "%02x", ff->md5[x]);
}
fprintf(fp, "\", ");
}
#endif
break;
case FILE_STATE_TRUNCATED:
fprintf(fp, "\"state\": \"TRUNCATED\", ");
break;
case FILE_STATE_ERROR:
fprintf(fp, "\"state\": \"ERROR\", ");
break;
default:
fprintf(fp, "\"state\": \"UNKNOWN\", ");
break;
}
fprintf(fp, "\"stored\": %s, ", ff->flags & FILE_STORED ? "true" : "false");
fprintf(fp, "\"size\": %"PRIu64" ", ff->size);
fprintf(fp, "}\n");
fflush(fp);
SCMutexUnlock(&aft->file_ctx->fp_mutex);
}
/**
* \internal
* \brief Write meta data on a single line json record
*/
static void LogFileWriteJsonRecord(LogFileLogThread *aft, Packet *p, File *ff, int ipver) {
SCMutexLock(&aft->file_ctx->fp_mutex);
FILE *fp = aft->file_ctx->fp;
char timebuf[64];
CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
fprintf(fp, "{ ");
if (ff->file_id > 0)
fprintf(fp, "\"id\": %u, ", ff->file_id);
fprintf(fp, "\"timestamp\": \"");
PrintRawJsonFp(fp, (uint8_t *)timebuf, strlen(timebuf));
fprintf(fp, "\", ");
if (p->pcap_cnt > 0) {
fprintf(fp, "\"pcap_pkt_num\": %"PRIu64", ", p->pcap_cnt);
}
fprintf(fp, "\"ipver\": %d, ", ipver == AF_INET ? 4 : 6);
char srcip[46], dstip[46];
Port sp, dp;
switch (ipver) {
case AF_INET:
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, sizeof(dstip));
break;
case AF_INET6:
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));
break;
default:
strlcpy(srcip, "<unknown>", sizeof(srcip));
strlcpy(dstip, "<unknown>", sizeof(dstip));
break;
}
sp = p->sp;
dp = p->dp;
fprintf(fp, "\"srcip\": \"%s\", ", srcip);
fprintf(fp, "\"dstip\": \"%s\", ", dstip);
fprintf(fp, "\"protocol\": %" PRIu32 ", ", p->proto);
if (PKT_IS_TCP(p) || PKT_IS_UDP(p)) {
fprintf(fp, "\"sp\": %" PRIu16 ", ", sp);
fprintf(fp, "\"dp\": %" PRIu16 ", ", dp);
}
fprintf(fp, "\"http_uri\": \"");
LogFileMetaGetUri(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_host\": \"");
LogFileMetaGetHost(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_referer\": \"");
LogFileMetaGetReferer(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"http_user_agent\": \"");
LogFileMetaGetUserAgent(fp, p, ff);
fprintf(fp, "\", ");
fprintf(fp, "\"filename\": \"");
PrintRawJsonFp(fp, ff->name, ff->name_len);
fprintf(fp, "\", ");
fprintf(fp, "\"magic\": \"");
if (ff->magic) {
PrintRawJsonFp(fp, (uint8_t *)ff->magic, strlen(ff->magic));
} else {
fprintf(fp, "unknown");
}
fprintf(fp, "\", ");
switch (ff->state) {
case FILE_STATE_CLOSED:
fprintf(fp, "\"state\": \"CLOSED\", ");
#ifdef HAVE_NSS
if (ff->flags & FILE_MD5) {
fprintf(fp, "\"md5\": \"");
size_t x;
for (x = 0; x < sizeof(ff->md5); x++) {
fprintf(fp, "%02x", ff->md5[x]);
}
fprintf(fp, "\", ");
}
#endif
break;
case FILE_STATE_TRUNCATED:
fprintf(fp, "\"state\": \"TRUNCATED\", ");
break;
case FILE_STATE_ERROR:
fprintf(fp, "\"state\": \"ERROR\", ");
break;
default:
fprintf(fp, "\"state\": \"UNKNOWN\", ");
break;
}
fprintf(fp, "\"stored\": %s, ", ff->flags & FILE_STORED ? "true" : "false");
fprintf(fp, "\"size\": %"PRIu64" ", ff->size);
fprintf(fp, "}\n");
fflush(fp);
SCMutexUnlock(&aft->file_ctx->fp_mutex);
}
