The Tcpdump Group git mirrors - libpcap/blob - testprogs/fuzz/fuzz_rclient.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <fcntl.h>
   4 #include <errno.h>
   5
   6 #include <pcap/pcap.h>
   7
   8 FILE * outfile = NULL;
   9 struct pcap_rmtauth auth;
  10
  11 void fuzz_openFile(const char * name) {
  12     if (outfile != NULL) {
  13         fclose(outfile);
  14     }
  15     outfile = fopen(name, "w");
  16     auth.type = RPCAP_RMTAUTH_PWD;
  17     auth.username = "user";
  18     auth.password = "pass";
  19 }
  20
  21 void sock_initfuzz(const uint8_t *Data, size_t Size);
  22 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  23     pcap_t * pkts;
  24     char errbuf[PCAP_ERRBUF_SIZE];
  25     const u_char *pkt;
  26     struct pcap_pkthdr *header;
  27     struct pcap_stat stats;
  28     int r;
  29
  30     //initialization
  31     if (outfile == NULL) {
  32         fuzz_openFile("/dev/null");
  33     }
  34
  35     sock_initfuzz(Data, Size);
  36     //initialize structure
  37     pkts = pcap_open("rpcap://127.0.0.1/fuzz.pcap", 0, 0, 1000, &auth, errbuf);
  38     if (pkts == NULL) {
  39         fprintf(outfile, "Couldn't open pcap file %s\n", errbuf);
  40         return 0;
  41     }
  42
  43     //loop over packets
  44     r = pcap_next_ex(pkts, &header, &pkt);
  45     while (r > 0) {
  46         fprintf(outfile, "packet length=%d/%d\n",header->caplen, header->len);
  47         r = pcap_next_ex(pkts, &header, &pkt);
  48     }
  49     if (pcap_stats(pkts, &stats) == 0) {
  50         fprintf(outfile, "number of packets=%d\n", stats.ps_recv);
  51     }
  52     //close structure
  53     pcap_close(pkts);
  54
  55     return 0;
  56 }