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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 WebSocket engine handles invalid handshake when connecting
// https://rfc.zeromq.org/spec/45/
extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
{
setup_test_context ();
char my_endpoint[MAX_SOCKET_STRING];
size_t my_endpoint_size = sizeof (my_endpoint);
void *server = test_context_socket (ZMQ_DEALER);
// 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 (server, ZMQ_MAXMSGSIZE, &max_msg_size, sizeof (int64_t)));
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (server, "ws://127.0.0.1:*"));
TEST_ASSERT_SUCCESS_ERRNO (zmq_getsockopt (server, ZMQ_LAST_ENDPOINT,
my_endpoint, &my_endpoint_size));
// Remove trailing /
my_endpoint[my_endpoint_size - 2] = '\0';
fd_t client = connect_socket (my_endpoint, AF_INET, IPPROTO_WS);
void *client_good = test_context_socket (ZMQ_DEALER);
my_endpoint[my_endpoint_size - 2] = '/';
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (client_good, my_endpoint));
// If there is not enough data for a full handshake, just send what we can
// Otherwise send websocket handshake first, as expected by the protocol
uint8_t buf[256];
if (size >= 192) {
send (client, (void *) data, 192, MSG_NOSIGNAL);
data += 192;
size -= 192;
}
recv (client, buf, 256, 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 (client, (const char *) data, size, MSG_NOSIGNAL);
msleep (250);
recv (client, buf, 256, MSG_DONTWAIT);
zmq_msg_t msg;
zmq_msg_init (&msg);
while (-1 != zmq_msg_recv (&msg, server, ZMQ_DONTWAIT)) {
zmq_msg_close (&msg);
zmq_msg_init (&msg);
}
send_string_expect_success (client_good, "abc", 0);
recv_string_expect_success (server, "abc", 0);
close (client);
test_context_socket_close_zero_linger (client_good);
test_context_socket_close_zero_linger (server);
teardown_test_context ();
return 0;
}
#ifndef ZMQ_USE_FUZZING_ENGINE
void test_bind_ws_fuzzer ()
{
uint8_t **data;
size_t *len, num_cases = 0;
if (fuzzer_corpus_encode (
"tests/libzmq-fuzz-corpora/test_bind_ws_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_bind_ws_fuzzer);
return UNITY_END ();
}
#endif
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