src/libsystemd-network/fuzz-ndisc-rs.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <arpa/inet.h>
   4 #include <netinet/icmp6.h>
   5 #include <unistd.h>
   6
   7 #include "sd-ndisc.h"
   8
   9 #include "alloc-util.h"
  10 #include "fd-util.h"
  11 #include "fuzz.h"
  12 #include "icmp6-util.h"
  13 #include "ndisc-internal.h"
  14 #include "socket-util.h"
  15
  16 static int test_fd[2] = PIPE_EBADF;
  17
  18 int icmp6_bind_router_solicitation(int index) {
  19         assert_se(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) >= 0);
  20         return test_fd[0];
  21 }
  22
  23 int icmp6_bind_router_advertisement(int index) {
  24         return -ENOSYS;
  25 }
  26
  27 int icmp6_receive(int fd, void *iov_base, size_t iov_len,
  28                   struct in6_addr *dst, triple_timestamp *timestamp) {
  29         assert_se(read(fd, iov_base, iov_len) == (ssize_t) iov_len);
  30
  31         if (timestamp)
  32                 triple_timestamp_get(timestamp);
  33
  34         return 0;
  35 }
  36
  37 int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
  38         return 0;
  39 }
  40
  41 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  42         struct ether_addr mac_addr = {
  43                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
  44         };
  45         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  46         _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
  47
  48         if (outside_size_range(size, 0, 2048))
  49                 return 0;
  50
  51         assert_se(sd_event_new(&e) >= 0);
  52         assert_se(sd_ndisc_new(&nd) >= 0);
  53         assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
  54         assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
  55         assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
  56         assert_se(sd_ndisc_start(nd) >= 0);
  57         assert_se(write(test_fd[1], data, size) == (ssize_t) size);
  58         (void) sd_event_run(e, UINT64_MAX);
  59         assert_se(sd_ndisc_stop(nd) >= 0);
  60         close(test_fd[1]);
  61
  62         return 0;
  63 }