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/**
* @file
* @author Philippe Antoine <contact@catenacyber.fr>
* fuzz target for predefined signatures and pcap (aware)
*/
#include "suricata-common.h"
#include "source-pcap-file.h"
#include "detect-engine.h"
#include "util-classification-config.h"
#include "util-reference-config.h"
#include "app-layer.h"
#include "tm-queuehandlers.h"
#include "util-cidr.h"
#include "util-profiling.h"
#include "util-proto-name.h"
#include "detect-engine-tag.h"
#include "detect-engine-threshold.h"
#include "host-bit.h"
#include "ippair-bit.h"
#include "app-layer-htp.h"
#include "detect-fast-pattern.h"
#include "util-unittest-helper.h"
#include "conf-yaml-loader.h"
#include "pkt-var.h"
#include "flow-util.h"
#include "tm-modules.h"
#include "tmqh-packetpool.h"
#include "util-conf.h"
#include "packet.h"
#include <fuzz_pcap.h>
int LLVMFuzzerInitialize(const int *argc, char ***argv);
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
static int initialized = 0;
ThreadVars tv;
DecodeThreadVars *dtv;
// FlowWorkerThreadData
void *fwd;
SCInstance surifuzz;
SC_ATOMIC_EXTERN(unsigned int, engine_stage);
#include "confyaml.c"
char *filepath = NULL;
int LLVMFuzzerInitialize(const int *argc, char ***argv)
{
filepath = dirname(strdup((*argv)[0]));
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
FPC_buffer_t pkts;
const u_char *pkt;
struct pcap_pkthdr header;
int r;
Packet *p;
size_t pcap_cnt = 0;
if (initialized == 0) {
// Redirects logs to /dev/null
setenv("SC_LOG_OP_IFACE", "file", 0);
setenv("SC_LOG_FILE", "/dev/null", 0);
InitGlobal();
GlobalsInitPreConfig();
run_mode = RUNMODE_PCAP_FILE;
// redirect logs to /tmp
ConfigSetLogDirectory("/tmp/");
// disables checksums validation for fuzzing
if (ConfYamlLoadString(configNoChecksum, strlen(configNoChecksum)) != 0) {
abort();
}
surifuzz.sig_file = malloc(strlen(filepath) + strlen("/fuzz.rules") + 1);
memcpy(surifuzz.sig_file, filepath, strlen(filepath));
memcpy(surifuzz.sig_file + strlen(filepath), "/fuzz.rules", strlen("/fuzz.rules"));
surifuzz.sig_file[strlen(filepath) + strlen("/fuzz.rules")] = 0;
surifuzz.sig_file_exclusive = 1;
// loads rules after init
surifuzz.delayed_detect = 1;
PostConfLoadedSetup(&surifuzz);
PreRunPostPrivsDropInit(run_mode);
PostConfLoadedDetectSetup(&surifuzz);
memset(&tv, 0, sizeof(tv));
tv.flow_queue = FlowQueueNew();
if (tv.flow_queue == NULL)
abort();
dtv = DecodeThreadVarsAlloc(&tv);
DecodeRegisterPerfCounters(dtv, &tv);
tmm_modules[TMM_FLOWWORKER].ThreadInit(&tv, NULL, &fwd);
StatsSetupPrivate(&tv);
extern uint16_t max_pending_packets;
max_pending_packets = 128;
PacketPoolInit();
if (DetectEngineReload(&surifuzz) < 0) {
return 0;
}
SC_ATOMIC_SET(engine_stage, SURICATA_RUNTIME);
initialized = 1;
}
if (size < FPC0_HEADER_LEN) {
return 0;
}
// initialize FPC with the buffer
if (FPC_init(&pkts, data, size) < 0) {
return 0;
}
// loop over packets
r = FPC_next(&pkts, &header, &pkt);
p = PacketGetFromAlloc();
if (p == NULL || r <= 0 || header.ts.tv_sec >= INT_MAX - 3600) {
goto bail;
}
p->ts = SCTIME_FROM_TIMEVAL(&header.ts);
p->datalink = pkts.datalink;
p->pkt_src = PKT_SRC_WIRE;
while (r > 0) {
if (PacketCopyData(p, pkt, header.caplen) == 0) {
// DecodePcapFile
TmEcode ecode = tmm_modules[TMM_DECODEPCAPFILE].Func(&tv, p, dtv);
if (ecode == TM_ECODE_FAILED) {
break;
}
Packet *extra_p = PacketDequeueNoLock(&tv.decode_pq);
while (extra_p != NULL) {
PacketFreeOrRelease(extra_p);
extra_p = PacketDequeueNoLock(&tv.decode_pq);
}
tmm_modules[TMM_FLOWWORKER].Func(&tv, p, fwd);
extra_p = PacketDequeueNoLock(&tv.decode_pq);
while (extra_p != NULL) {
PacketFreeOrRelease(extra_p);
extra_p = PacketDequeueNoLock(&tv.decode_pq);
}
}
r = FPC_next(&pkts, &header, &pkt);
if (r <= 0 || header.ts.tv_sec >= INT_MAX - 3600) {
goto bail;
}
PacketRecycle(p);
p->ts = SCTIME_FROM_TIMEVAL(&header.ts);
p->datalink = pkts.datalink;
pcap_cnt++;
p->pcap_cnt = pcap_cnt;
p->pkt_src = PKT_SRC_WIRE;
}
bail:
if (p != NULL) {
PacketFree(p);
}
FlowReset();
return 0;
}
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