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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>
struct ndpi_workflow_prefs *prefs = NULL;
struct ndpi_workflow *workflow = NULL;
int nDPI_LogLevel = 0;
char *_debug_protocols = NULL;
u_int32_t current_ndpi_memory = 0, max_ndpi_memory = 0;
u_int8_t enable_protocol_guess = 1, 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 = 16 /* 8 is enough for most protocols, Signal requires more */, max_num_tcp_dissected_pkts = 80 /* due to telnet */;
int enable_malloc_bins = 1;
int malloc_size_stats = 0;
int max_malloc_bins = 14;
struct ndpi_bin malloc_bins; /* unused */
extern void ndpi_report_payload_stats(FILE *out);
#ifdef CRYPT_FORCE_NO_AESNI
extern int force_no_aesni;
#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;
NDPI_PROTOCOL_BITMASK debug_bitmask;
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
workflow = ndpi_workflow_init(prefs, NULL /* pcap handler will be set later */, 0, ndpi_serialization_format_json);
NDPI_BITMASK_SET_ALL(debug_bitmask);
ndpi_set_log_level(workflow->ndpi_struct, 4);
ndpi_set_debug_bitmask(workflow->ndpi_struct, debug_bitmask);
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, "flow.track_payload.enable", "1");
ndpi_set_config(workflow->ndpi_struct, NULL, "tcp_ack_payload_heuristic.enable", "1");
ndpi_set_config(workflow->ndpi_struct, "tls", "application_blocks_tracking.enable", "1");
memset(workflow->stats.protocol_counter, 0,
sizeof(workflow->stats.protocol_counter));
memset(workflow->stats.protocol_counter_bytes, 0,
sizeof(workflow->stats.protocol_counter_bytes));
memset(workflow->stats.protocol_flows, 0,
sizeof(workflow->stats.protocol_flows));
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;
memcpy(packet_checked, pkt, header->caplen);
ndpi_workflow_process_packet(workflow, header, packet_checked, &flow_risk);
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, without printing */
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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