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/* SPDX-License-Identifier: MPL-2.0 */
#ifdef ZMQ_USE_FUZZING_ENGINE
#include <fuzzer/FuzzedDataProvider.h>
#endif
#include "testutil.hpp"
#include "testutil_unity.hpp"
// Test that the ZMTP engine handles invalid handshake when connecting
// https://rfc.zeromq.org/spec/37/
extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
{
setup_test_context ();
char my_endpoint[MAX_SOCKET_STRING];
fd_t server = bind_socket_resolve_port ("127.0.0.1", "0", my_endpoint);
void *client = test_context_socket (ZMQ_STREAM);
// As per API by default there's no limit to the size of a message,
// but the sanitizer allocator will barf over a gig or so
int64_t max_msg_size = 64 * 1024 * 1024;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (client, ZMQ_MAXMSGSIZE, &max_msg_size, sizeof (int64_t)));
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (client, my_endpoint));
fd_t server_accept =
TEST_ASSERT_SUCCESS_RAW_ERRNO (accept (server, NULL, NULL));
// If there is not enough data for a full greeting, just send what we can
// Otherwise send greeting first, as expected by the protocol
uint8_t buf[64];
if (size >= 64) {
send (server_accept, (void *) data, 64, MSG_NOSIGNAL);
data += 64;
size -= 64;
}
recv (server_accept, buf, 64, MSG_DONTWAIT);
msleep (250);
for (ssize_t sent = 0; size > 0 && (sent != -1 || errno == EINTR);
size -= sent > 0 ? sent : 0, data += sent > 0 ? sent : 0)
sent = send (server_accept, (const char *) data, size, MSG_NOSIGNAL);
msleep (250);
zmq_msg_t msg;
zmq_msg_init (&msg);
while (-1 != zmq_msg_recv (&msg, client, ZMQ_DONTWAIT)) {
zmq_msg_close (&msg);
zmq_msg_init (&msg);
}
close (server_accept);
close (server);
test_context_socket_close_zero_linger (client);
teardown_test_context ();
return 0;
}
#ifndef ZMQ_USE_FUZZING_ENGINE
void test_connect_null_fuzzer ()
{
uint8_t **data;
size_t *len, num_cases = 0;
if (fuzzer_corpus_encode (
"tests/libzmq-fuzz-corpora/test_connect_null_fuzzer_seed_corpus",
&data, &len, &num_cases)
!= 0)
exit (77);
while (num_cases-- > 0) {
TEST_ASSERT_SUCCESS_ERRNO (
LLVMFuzzerTestOneInput (data[num_cases], len[num_cases]));
free (data[num_cases]);
}
free (data);
free (len);
}
int main (int argc, char **argv)
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_connect_null_fuzzer);
return UNITY_END ();
}
#endif
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