tests/fuzz_edp.c

   1 /* -*- mode: c; c-file-style: "openbsd" -*- */
   2 /*
   3  * Copyright (c) 2023 Vincent Bernat <bernat@luffy.cx>
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "../src/daemon/lldpd.h"
  19
  20 #define kMinInputLength 5
  21 #define kMaxInputLength 2048
  22
  23 /* Use this callback to avoid some logs */
  24 void donothing(int pri, const char *msg) {};
  25
  26 extern int
  27 LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
  28 {
  29         if (Size < kMinInputLength || Size > kMaxInputLength) {
  30                 return 1;
  31         }
  32
  33         struct lldpd cfg;
  34         cfg.g_config.c_mgmt_pattern = NULL;
  35         cfg.g_config.c_tx_hold = LLDPD_TX_HOLD;
  36
  37         struct lldpd_chassis *nchassis = NULL;
  38         struct lldpd_port *nport = NULL;
  39         struct lldpd_hardware hardware;
  40         TAILQ_INIT(&hardware.h_rports);
  41         log_register(donothing);
  42
  43         edp_decode(&cfg, (char *)Data, Size, &hardware, &nchassis, &nport);
  44
  45         if (!nchassis || !nport) {
  46                 return 1;
  47         }
  48
  49         lldpd_port_cleanup(nport, 1);
  50         free(nport);
  51         lldpd_chassis_cleanup(nchassis, 1);
  52
  53         return 0;
  54 }