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#include "reader_util.h"
#include "ndpi_api.h"
#include "fuzz_common_code.h"
#include <pcap/pcap.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#ifdef ENABLE_PCAP_L7_MUTATOR
#include "pl7m.h"
#endif
struct ndpi_workflow_prefs *prefs = NULL;
struct ndpi_workflow *workflow = NULL;
struct ndpi_global_context *g_ctx;
u_int8_t enable_payload_analyzer = 0;
u_int8_t enable_flow_stats = 1;
u_int8_t human_readeable_string_len = 5;
u_int8_t max_num_udp_dissected_pkts = 0, max_num_tcp_dissected_pkts = 0; /* Disable limits at application layer */;
int malloc_size_stats = 0;
FILE *fingerprint_fp = NULL;
bool do_load_lists = false;
char *addr_dump_path = NULL;
int monitoring_enabled = 0;
extern void ndpi_report_payload_stats(FILE *out);
#ifdef CRYPT_FORCE_NO_AESNI
extern int force_no_aesni;
#endif
#ifdef ENABLE_PCAP_L7_MUTATOR
size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size,
size_t MaxSize, unsigned int Seed) {
return pl7m_mutator(Data, Size, MaxSize, Seed);
}
#endif
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
pcap_t * pkts;
const u_char *pkt;
struct pcap_pkthdr *header;
int r;
char errbuf[PCAP_ERRBUF_SIZE];
NDPI_PROTOCOL_BITMASK all;
u_int i;
FILE *fd;
if (prefs == NULL) {
prefs = calloc(sizeof(struct ndpi_workflow_prefs), 1);
if (prefs == NULL) {
//should not happen
return 1;
}
prefs->decode_tunnels = 1;
prefs->num_roots = 16;
prefs->max_ndpi_flows = 16 * 1024 * 1024;
prefs->quiet_mode = 0;
#ifdef ENABLE_MEM_ALLOC_FAILURES
fuzz_set_alloc_callbacks();
#endif
g_ctx = ndpi_global_init();
workflow = ndpi_workflow_init(prefs, NULL /* pcap handler will be set later */, 0, ndpi_serialization_format_json, g_ctx);
ndpi_workflow_set_flow_callback(workflow, NULL, NULL); /* No real callback */
ndpi_set_config(workflow->ndpi_struct, NULL, "log.level", "3");
ndpi_set_config(workflow->ndpi_struct, "all", "log", "1");
ndpi_load_domain_suffixes(workflow->ndpi_struct, "public_suffix_list.dat");
ndpi_load_categories_dir(workflow->ndpi_struct, "./lists/");
ndpi_load_protocols_file(workflow->ndpi_struct, "protos.txt");
ndpi_load_categories_file(workflow->ndpi_struct, "categories.txt", NULL);
ndpi_load_risk_domain_file(workflow->ndpi_struct, "risky_domains.txt");
ndpi_load_malicious_ja3_file(workflow->ndpi_struct, "ja3_fingerprints.csv");
ndpi_load_malicious_sha1_file(workflow->ndpi_struct, "sha1_fingerprints.csv");
// enable all protocols
NDPI_BITMASK_SET_ALL(all);
ndpi_set_protocol_detection_bitmask2(workflow->ndpi_struct, &all);
ndpi_set_config(workflow->ndpi_struct, NULL, "packets_limit_per_flow", "255");
ndpi_set_config(workflow->ndpi_struct, NULL, "flow.track_payload", "1");
ndpi_set_config(workflow->ndpi_struct, NULL, "tcp_ack_payload_heuristic", "1");
ndpi_set_config(workflow->ndpi_struct, "tls", "application_blocks_tracking", "1");
ndpi_set_config(workflow->ndpi_struct, "stun", "max_packets_extra_dissection", "40");
ndpi_set_config(workflow->ndpi_struct, "zoom", "max_packets_extra_dissection", "255");
ndpi_set_config(workflow->ndpi_struct, "rtp", "search_for_stun", "1");
ndpi_set_config(workflow->ndpi_struct, "openvpn", "dpi.heuristics", "0x01");
ndpi_set_config(workflow->ndpi_struct, "openvpn", "dpi.heuristics.num_messages", "20");
ndpi_set_config(workflow->ndpi_struct, "tls", "metadata.ja4r_fingerprint", "1");
ndpi_set_config(workflow->ndpi_struct, "tls", "dpi.heuristics", "0x07");
ndpi_set_config(workflow->ndpi_struct, "tls", "dpi.heuristics.max_packets_extra_dissection", "40");
ndpi_set_config(workflow->ndpi_struct, "stun", "monitoring", "1");
ndpi_set_config(workflow->ndpi_struct, NULL, "dpi.address_cache_size", "8192");
ndpi_finalize_initialization(workflow->ndpi_struct);
#ifdef CRYPT_FORCE_NO_AESNI
force_no_aesni = 1;
#endif
#ifdef ENABLE_PAYLOAD_ANALYZER
enable_payload_analyzer = 1;
#endif
}
#ifdef ENABLE_MEM_ALLOC_FAILURES
/* Don't fail memory allocations until init phase is done */
fuzz_set_alloc_callbacks_and_seed(Size);
#endif
fd = buffer_to_file(Data, Size);
if (fd == NULL)
return 0;
pkts = pcap_fopen_offline(fd, errbuf);
if (pkts == NULL) {
fclose(fd);
return 0;
}
if (ndpi_is_datalink_supported(pcap_datalink(pkts)) == 0)
{
/* Do not fail if the datalink type is not supported (may happen often during fuzzing). */
pcap_close(pkts);
return 0;
}
workflow->pcap_handle = pkts;
/* Init flow tree */
workflow->ndpi_flows_root = ndpi_calloc(workflow->prefs.num_roots, sizeof(void *));
if(!workflow->ndpi_flows_root) {
pcap_close(pkts);
return 0;
}
header = NULL;
r = pcap_next_ex(pkts, &header, &pkt);
while (r > 0) {
/* allocate an exact size buffer to check overflows */
uint8_t *packet_checked = malloc(header->caplen);
if(packet_checked) {
ndpi_risk flow_risk;
struct ndpi_flow_info *flow = NULL; /* unused */
memcpy(packet_checked, pkt, header->caplen);
ndpi_workflow_process_packet(workflow, header, packet_checked, &flow_risk, &flow);
free(packet_checked);
}
r = pcap_next_ex(pkts, &header, &pkt);
}
pcap_close(pkts);
/* Free flow trees */
for(i = 0; i < workflow->prefs.num_roots; i++)
ndpi_tdestroy(workflow->ndpi_flows_root[i], ndpi_flow_info_freer);
ndpi_free(workflow->ndpi_flows_root);
/* Free payload analyzer data */
if(enable_payload_analyzer)
ndpi_report_payload_stats(stdout);
#ifdef ENABLE_PAYLOAD_ANALYZER
ndpi_update_params(SPLT_PARAM_TYPE, "splt_param.txt");
ndpi_update_params(BD_PARAM_TYPE, "bd_param.txt");
ndpi_update_params(2, ""); /* invalid */
#endif
return 0;
}
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