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#include <cassert>
#include <cstdio>
#include <functional>
#include <memory>
#include "../../toxcore/tox.h"
#include "../../toxcore/tox_dispatch.h"
#include "../../toxcore/tox_events.h"
#include "../support/public/fuzz_data.hh"
#include "../support/public/fuzz_helpers.hh"
#include "../support/public/simulated_environment.hh"
namespace {
using tox::test::configure_fuzz_memory_source;
using tox::test::configure_fuzz_packet_source;
using tox::test::FakeClock;
using tox::test::Fuzz_Data;
using tox::test::SimulatedEnvironment;
template <typename T>
using Ptr = std::unique_ptr<T, void (*)(T *)>;
void setup_callbacks(Tox_Dispatch *dispatch)
{
tox_events_callback_conference_connected(
dispatch, [](const Tox_Event_Conference_Connected *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_connected(
dispatch, [](const Tox_Event_Conference_Connected *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_invite(
dispatch, [](const Tox_Event_Conference_Invite *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_message(
dispatch, [](const Tox_Event_Conference_Message *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_peer_list_changed(
dispatch, [](const Tox_Event_Conference_Peer_List_Changed *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_peer_name(
dispatch, [](const Tox_Event_Conference_Peer_Name *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_conference_title(dispatch,
[](const Tox_Event_Conference_Title *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_file_chunk_request(
dispatch, [](const Tox_Event_File_Chunk_Request *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_file_recv(dispatch,
[](const Tox_Event_File_Recv *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_file_recv_chunk(dispatch,
[](const Tox_Event_File_Recv_Chunk *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_file_recv_control(
dispatch, [](const Tox_Event_File_Recv_Control *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_connection_status(
dispatch, [](const Tox_Event_Friend_Connection_Status *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_lossless_packet(
dispatch, [](const Tox_Event_Friend_Lossless_Packet *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_lossy_packet(
dispatch, [](const Tox_Event_Friend_Lossy_Packet *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_message(dispatch,
[](const Tox_Event_Friend_Message *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_friend_name(dispatch,
[](const Tox_Event_Friend_Name *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_friend_read_receipt(
dispatch, [](const Tox_Event_Friend_Read_Receipt *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_request(
dispatch, [](const Tox_Event_Friend_Request *event, void *user_data) {
Tox *tox = static_cast<Tox *>(user_data);
Tox_Err_Friend_Add err;
tox_friend_add_norequest(tox, tox_event_friend_request_get_public_key(event), &err);
if (!(err == TOX_ERR_FRIEND_ADD_OK || err == TOX_ERR_FRIEND_ADD_OWN_KEY
|| err == TOX_ERR_FRIEND_ADD_ALREADY_SENT
|| err == TOX_ERR_FRIEND_ADD_BAD_CHECKSUM
|| err == TOX_ERR_FRIEND_ADD_MALLOC)) {
printf("unexpected error: %s\n", tox_err_friend_add_to_string(err));
}
});
tox_events_callback_friend_status(dispatch,
[](const Tox_Event_Friend_Status *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_friend_status_message(
dispatch, [](const Tox_Event_Friend_Status_Message *event, void *user_data) {
assert(event == nullptr);
});
tox_events_callback_friend_typing(dispatch,
[](const Tox_Event_Friend_Typing *event, void *user_data) { assert(event == nullptr); });
tox_events_callback_self_connection_status(
dispatch, [](const Tox_Event_Self_Connection_Status *event, void *user_data) {
assert(event == nullptr);
});
}
void TestBootstrap(Fuzz_Data &input)
{
SimulatedEnvironment env;
env.fake_clock().advance(1000000000); // Match legacy behavior
auto node = env.create_node(33445);
configure_fuzz_memory_source(env.fake_memory(), input);
configure_fuzz_packet_source(*node->endpoint, input);
// Create a second null system for tox_events_equal check
SimulatedEnvironment null_env;
auto null_node = null_env.create_node(0); // Port 0 (unbound/irrelevant)
Ptr<Tox_Options> opts(tox_options_new(nullptr), tox_options_free);
assert(opts != nullptr);
tox_options_set_log_callback(opts.get(),
[](Tox *tox, Tox_Log_Level level, const char *file, uint32_t line, const char *func,
const char *message, void *user_data) {
// Log to stdout.
if (Fuzz_Data::FUZZ_DEBUG) {
// Approximate level name mapping
char level_char = '?';
switch (level) {
case TOX_LOG_LEVEL_TRACE:
level_char = 'T';
break;
case TOX_LOG_LEVEL_DEBUG:
level_char = 'D';
break;
case TOX_LOG_LEVEL_INFO:
level_char = 'I';
break;
case TOX_LOG_LEVEL_WARNING:
level_char = 'W';
break;
case TOX_LOG_LEVEL_ERROR:
level_char = 'E';
break;
}
std::printf("[tox1] %c %s:%u(%s): %s\n", level_char, file, line, func, message);
}
});
CONSUME1_OR_RETURN(const uint8_t, proxy_type, input);
if (proxy_type == 0) {
tox_options_set_proxy_type(opts.get(), TOX_PROXY_TYPE_NONE);
} else if (proxy_type == 1) {
tox_options_set_proxy_type(opts.get(), TOX_PROXY_TYPE_SOCKS5);
tox_options_set_proxy_host(opts.get(), "127.0.0.1");
tox_options_set_proxy_port(opts.get(), 8080);
} else if (proxy_type == 2) {
tox_options_set_proxy_type(opts.get(), TOX_PROXY_TYPE_HTTP);
tox_options_set_proxy_host(opts.get(), "127.0.0.1");
tox_options_set_proxy_port(opts.get(), 8080);
}
CONSUME1_OR_RETURN(const uint8_t, tcp_relay_enabled, input);
if (tcp_relay_enabled >= (UINT8_MAX / 2)) {
tox_options_set_tcp_port(opts.get(), 33445);
}
Tox_Options_Testing tox_options_testing;
tox_options_testing.operating_system = &node->system;
Tox_Err_New error_new;
Tox_Err_New_Testing error_new_testing;
Tox *tox = tox_new_testing(opts.get(), &error_new, &tox_options_testing, &error_new_testing);
if (tox == nullptr) {
// It might fail, because some I/O happens in tox_new, and the fuzzer
// might do things that make that I/O fail.
return;
}
assert(error_new == TOX_ERR_NEW_OK);
assert(error_new_testing == TOX_ERR_NEW_TESTING_OK);
uint8_t pub_key[TOX_PUBLIC_KEY_SIZE] = {0};
// These may fail, but that's ok. We ignore their return values.
tox_bootstrap(tox, "127.0.0.2", 33446, pub_key, nullptr);
tox_add_tcp_relay(tox, "127.0.0.2", 33446, pub_key, nullptr);
tox_events_init(tox);
Tox_Dispatch *dispatch = tox_dispatch_new(nullptr);
assert(dispatch != nullptr);
setup_callbacks(dispatch);
size_t input_size = input.size();
while (!input.empty()) {
Tox_Err_Events_Iterate error_iterate;
Tox_Events *events = tox_events_iterate(tox, true, &error_iterate);
assert(tox_events_equal(&null_node->system, events, events));
tox_dispatch_invoke(dispatch, events, tox);
tox_events_free(events);
env.advance_time(200);
// If no input was consumed, stop.
if (input_size == input.size()) {
break;
}
input_size = input.size();
}
tox_dispatch_free(dispatch);
tox_kill(tox);
}
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
Fuzz_Data input{data, size};
TestBootstrap(input);
return 0; // Non-zero return values are reserved for future use.
}
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