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refactor: Allow custom network functions.
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The idea here is to have a `Network` object that contains functions for
network operations and an optional userdata object that can manage those
network operations. This allows e.g. a fuzzer to replace the network
functions with no-ops or fuzzer inputs, reducing the need for `#ifdef`s.
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@iphydf
iphydf committed Mar 27, 2022
1 parent ac3e8fe commit 3ab4d99
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Showing 30 changed files with 595 additions and 372 deletions.
72 changes: 40 additions & 32 deletions auto_tests/TCP_test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,8 @@ static void test_basic(void)
uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Server *tcp_s = new_TCP_server(logger, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
const Network *ns = &system_network;
TCP_Server *tcp_s = new_TCP_server(logger, ns, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
ck_assert_msg(tcp_s != nullptr, "Failed to create a TCP relay server.");
ck_assert_msg(tcp_server_listen_count(tcp_s) == NUM_PORTS,
"Failed to bind a TCP relay server to all %d attempted ports.", NUM_PORTS);
Expand All @@ -65,14 +66,14 @@ static void test_basic(void)

// Check all opened ports for connectivity.
for (uint8_t i = 0; i < NUM_PORTS; i++) {
sock = net_socket(net_family_ipv6, TOX_SOCK_STREAM, TOX_PROTO_TCP);
sock = net_socket(ns, net_family_ipv6, TOX_SOCK_STREAM, TOX_PROTO_TCP);
localhost.port = net_htons(ports[i]);
bool ret = net_connect(logger, sock, &localhost);
ck_assert_msg(ret, "Failed to connect to created TCP relay server on port %d (%d).", ports[i], errno);

// Leave open one connection for the next test.
if (i + 1 < NUM_PORTS) {
kill_sock(sock);
kill_sock(ns, sock);
}
}

Expand All @@ -99,21 +100,21 @@ static void test_basic(void)
"encrypt_data() call failed.");

// Sending the handshake
ck_assert_msg(net_send(logger, sock, handshake, TCP_CLIENT_HANDSHAKE_SIZE - 1,
ck_assert_msg(net_send(ns, logger, sock, handshake, TCP_CLIENT_HANDSHAKE_SIZE - 1,
&localhost) == TCP_CLIENT_HANDSHAKE_SIZE - 1,
"An attempt to send the initial handshake minus last byte failed.");

do_TCP_server_delay(tcp_s, mono_time, 50);

ck_assert_msg(net_send(logger, sock, handshake + (TCP_CLIENT_HANDSHAKE_SIZE - 1), 1, &localhost) == 1,
ck_assert_msg(net_send(ns, logger, sock, handshake + (TCP_CLIENT_HANDSHAKE_SIZE - 1), 1, &localhost) == 1,
"The attempt to send the last byte of handshake failed.");

do_TCP_server_delay(tcp_s, mono_time, 50);

// Receiving server response and decrypting it
uint8_t response[TCP_SERVER_HANDSHAKE_SIZE];
uint8_t response_plain[TCP_HANDSHAKE_PLAIN_SIZE];
ck_assert_msg(net_recv(logger, sock, response, TCP_SERVER_HANDSHAKE_SIZE, &localhost) == TCP_SERVER_HANDSHAKE_SIZE,
ck_assert_msg(net_recv(ns, logger, sock, response, TCP_SERVER_HANDSHAKE_SIZE, &localhost) == TCP_SERVER_HANDSHAKE_SIZE,
"Could/did not receive a server response to the initial handshake.");
ret = decrypt_data(self_public_key, f_secret_key, response, response + CRYPTO_NONCE_SIZE,
TCP_SERVER_HANDSHAKE_SIZE - CRYPTO_NONCE_SIZE, response_plain);
Expand Down Expand Up @@ -142,7 +143,7 @@ static void test_basic(void)
msg_length = sizeof(r_req) - i;
}

ck_assert_msg(net_send(logger, sock, r_req + i, msg_length, &localhost) == msg_length,
ck_assert_msg(net_send(ns, logger, sock, r_req + i, msg_length, &localhost) == msg_length,
"Failed to send request after completing the handshake.");
i += msg_length;

Expand All @@ -153,7 +154,7 @@ static void test_basic(void)

// Receiving the second response and verifying its validity
uint8_t packet_resp[4096];
int recv_data_len = net_recv(logger, sock, packet_resp, 2 + 2 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE, &localhost);
int recv_data_len = net_recv(ns, logger, sock, packet_resp, 2 + 2 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE, &localhost);
ck_assert_msg(recv_data_len == 2 + 2 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE,
"Failed to receive server response to request. %d", recv_data_len);
memcpy(&size, packet_resp, 2);
Expand All @@ -171,7 +172,7 @@ static void test_basic(void)
ck_assert_msg(pk_equal(packet_resp_plain + 2, f_public_key), "Server sent the wrong public key.");

// Closing connections.
kill_sock(sock);
kill_sock(ns, sock);
kill_TCP_server(tcp_s);

logger_kill(logger);
Expand All @@ -180,17 +181,19 @@ static void test_basic(void)

struct sec_TCP_con {
Socket sock;
const Network *ns;
uint8_t public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t recv_nonce[CRYPTO_NONCE_SIZE];
uint8_t sent_nonce[CRYPTO_NONCE_SIZE];
uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
};

static struct sec_TCP_con *new_TCP_con(const Logger *logger, TCP_Server *tcp_s, Mono_Time *mono_time)
static struct sec_TCP_con *new_TCP_con(const Logger *logger, const Network *ns, TCP_Server *tcp_s, Mono_Time *mono_time)
{
struct sec_TCP_con *sec_c = (struct sec_TCP_con *)malloc(sizeof(struct sec_TCP_con));
ck_assert(sec_c != nullptr);
Socket sock = net_socket(net_family_ipv6, TOX_SOCK_STREAM, TOX_PROTO_TCP);
sec_c->ns = ns;
Socket sock = net_socket(ns, net_family_ipv6, TOX_SOCK_STREAM, TOX_PROTO_TCP);

IP_Port localhost;
localhost.ip = get_loopback();
Expand All @@ -216,20 +219,20 @@ static struct sec_TCP_con *new_TCP_con(const Logger *logger, TCP_Server *tcp_s,
ck_assert_msg(ret == TCP_CLIENT_HANDSHAKE_SIZE - (CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE),
"Failed to encrypt the outgoing handshake.");

ck_assert_msg(net_send(logger, sock, handshake, TCP_CLIENT_HANDSHAKE_SIZE - 1,
ck_assert_msg(net_send(ns, logger, sock, handshake, TCP_CLIENT_HANDSHAKE_SIZE - 1,
&localhost) == TCP_CLIENT_HANDSHAKE_SIZE - 1,
"Failed to send the first portion of the handshake to the TCP relay server.");

do_TCP_server_delay(tcp_s, mono_time, 50);

ck_assert_msg(net_send(logger, sock, handshake + (TCP_CLIENT_HANDSHAKE_SIZE - 1), 1, &localhost) == 1,
ck_assert_msg(net_send(ns, logger, sock, handshake + (TCP_CLIENT_HANDSHAKE_SIZE - 1), 1, &localhost) == 1,
"Failed to send last byte of handshake.");

do_TCP_server_delay(tcp_s, mono_time, 50);

uint8_t response[TCP_SERVER_HANDSHAKE_SIZE];
uint8_t response_plain[TCP_HANDSHAKE_PLAIN_SIZE];
ck_assert_msg(net_recv(logger, sock, response, TCP_SERVER_HANDSHAKE_SIZE, &localhost) == TCP_SERVER_HANDSHAKE_SIZE,
ck_assert_msg(net_recv(sec_c->ns, logger, sock, response, TCP_SERVER_HANDSHAKE_SIZE, &localhost) == TCP_SERVER_HANDSHAKE_SIZE,
"Failed to receive server handshake response.");
ret = decrypt_data(tcp_server_public_key(tcp_s), f_secret_key, response, response + CRYPTO_NONCE_SIZE,
TCP_SERVER_HANDSHAKE_SIZE - CRYPTO_NONCE_SIZE, response_plain);
Expand All @@ -242,7 +245,7 @@ static struct sec_TCP_con *new_TCP_con(const Logger *logger, TCP_Server *tcp_s,

static void kill_TCP_con(struct sec_TCP_con *con)
{
kill_sock(con->sock);
kill_sock(con->ns, con->sock);
free(con);
}

Expand All @@ -265,7 +268,7 @@ static int write_packet_TCP_test_connection(const Logger *logger, struct sec_TCP
localhost.ip = get_loopback();
localhost.port = 0;

ck_assert_msg(net_send(logger, con->sock, packet, SIZEOF_VLA(packet), &localhost) == SIZEOF_VLA(packet),
ck_assert_msg(net_send(con->ns, logger, con->sock, packet, SIZEOF_VLA(packet), &localhost) == SIZEOF_VLA(packet),
"Failed to send a packet.");
return 0;
}
Expand All @@ -276,7 +279,7 @@ static int read_packet_sec_TCP(const Logger *logger, struct sec_TCP_con *con, ui
localhost.ip = get_loopback();
localhost.port = 0;

int rlen = net_recv(logger, con->sock, data, length, &localhost);
int rlen = net_recv(con->ns, logger, con->sock, data, length, &localhost);
ck_assert_msg(rlen == length, "Did not receive packet of correct length. Wanted %i, instead got %i", length, rlen);
rlen = decrypt_data_symmetric(con->shared_key, con->recv_nonce, data + 2, length - 2, data);
ck_assert_msg(rlen != -1, "Failed to decrypt a received packet from the Relay server.");
Expand All @@ -288,17 +291,18 @@ static void test_some(void)
{
Mono_Time *mono_time = mono_time_new();
Logger *logger = logger_new();
const Network *ns = &system_network;

uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Server *tcp_s = new_TCP_server(logger, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
TCP_Server *tcp_s = new_TCP_server(logger, ns, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
ck_assert_msg(tcp_s != nullptr, "Failed to create TCP relay server");
ck_assert_msg(tcp_server_listen_count(tcp_s) == NUM_PORTS, "Failed to bind to all ports.");

struct sec_TCP_con *con1 = new_TCP_con(logger, tcp_s, mono_time);
struct sec_TCP_con *con2 = new_TCP_con(logger, tcp_s, mono_time);
struct sec_TCP_con *con3 = new_TCP_con(logger, tcp_s, mono_time);
struct sec_TCP_con *con1 = new_TCP_con(logger, ns, tcp_s, mono_time);
struct sec_TCP_con *con2 = new_TCP_con(logger, ns, tcp_s, mono_time);
struct sec_TCP_con *con3 = new_TCP_con(logger, ns, tcp_s, mono_time);

uint8_t requ_p[1 + CRYPTO_PUBLIC_KEY_SIZE];
requ_p[0] = TCP_PACKET_ROUTING_REQUEST;
Expand Down Expand Up @@ -480,7 +484,8 @@ static void test_client(void)
uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Server *tcp_s = new_TCP_server(logger, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
const Network *ns = &system_network;
TCP_Server *tcp_s = new_TCP_server(logger, ns, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
ck_assert_msg(tcp_s != nullptr, "Failed to create a TCP relay server.");
ck_assert_msg(tcp_server_listen_count(tcp_s) == NUM_PORTS, "Failed to bind the relay server to all ports.");

Expand All @@ -492,7 +497,7 @@ static void test_client(void)
ip_port_tcp_s.port = net_htons(ports[random_u32() % NUM_PORTS]);
ip_port_tcp_s.ip = get_loopback();

TCP_Client_Connection *conn = new_TCP_connection(logger, mono_time, &ip_port_tcp_s, self_public_key, f_public_key,
TCP_Client_Connection *conn = new_TCP_connection(logger, mono_time, ns, &ip_port_tcp_s, self_public_key, f_public_key,
f_secret_key, nullptr);
do_TCP_connection(logger, mono_time, conn, nullptr);
c_sleep(50);
Expand Down Expand Up @@ -527,7 +532,7 @@ static void test_client(void)
uint8_t f2_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(f2_public_key, f2_secret_key);
ip_port_tcp_s.port = net_htons(ports[random_u32() % NUM_PORTS]);
TCP_Client_Connection *conn2 = new_TCP_connection(logger, mono_time, &ip_port_tcp_s, self_public_key, f2_public_key,
TCP_Client_Connection *conn2 = new_TCP_connection(logger, mono_time, ns, &ip_port_tcp_s, self_public_key, f2_public_key,
f2_secret_key, nullptr);

// The client should call this function (defined earlier) during the routing process.
Expand Down Expand Up @@ -604,6 +609,7 @@ static void test_client_invalid(void)
{
Mono_Time *mono_time = mono_time_new();
Logger *logger = logger_new();
const Network *ns = &system_network;

uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
Expand All @@ -616,8 +622,8 @@ static void test_client_invalid(void)

ip_port_tcp_s.port = net_htons(ports[random_u32() % NUM_PORTS]);
ip_port_tcp_s.ip = get_loopback();
TCP_Client_Connection *conn = new_TCP_connection(logger, mono_time, &ip_port_tcp_s, self_public_key, f_public_key,
f_secret_key, nullptr);
TCP_Client_Connection *conn = new_TCP_connection(logger, mono_time, ns, &ip_port_tcp_s,
self_public_key, f_public_key, f_secret_key, nullptr);

// Run the client's main loop but not the server.
mono_time_update(mono_time);
Expand Down Expand Up @@ -676,22 +682,23 @@ static void test_tcp_connection(void)
{
Mono_Time *mono_time = mono_time_new();
Logger *logger = logger_new();
const Network *ns = &system_network;

tcp_data_callback_called = 0;
uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Server *tcp_s = new_TCP_server(logger, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
TCP_Server *tcp_s = new_TCP_server(logger, ns, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
ck_assert_msg(pk_equal(tcp_server_public_key(tcp_s), self_public_key), "Wrong public key");

TCP_Proxy_Info proxy_info;
proxy_info.proxy_type = TCP_PROXY_NONE;
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Connections *tc_1 = new_tcp_connections(logger, mono_time, self_secret_key, &proxy_info);
TCP_Connections *tc_1 = new_tcp_connections(logger, mono_time, ns, self_secret_key, &proxy_info);
ck_assert_msg(pk_equal(tcp_connections_public_key(tc_1), self_public_key), "Wrong public key");

crypto_new_keypair(self_public_key, self_secret_key);
TCP_Connections *tc_2 = new_tcp_connections(logger, mono_time, self_secret_key, &proxy_info);
TCP_Connections *tc_2 = new_tcp_connections(logger, mono_time, ns, self_secret_key, &proxy_info);
ck_assert_msg(pk_equal(tcp_connections_public_key(tc_2), self_public_key), "Wrong public key");

IP_Port ip_port_tcp_s;
Expand Down Expand Up @@ -782,24 +789,25 @@ static void test_tcp_connection2(void)
{
Mono_Time *mono_time = mono_time_new();
Logger *logger = logger_new();
const Network *ns = &system_network;

tcp_oobdata_callback_called = 0;
tcp_data_callback_called = 0;

uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Server *tcp_s = new_TCP_server(logger, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
TCP_Server *tcp_s = new_TCP_server(logger, ns, USE_IPV6, NUM_PORTS, ports, self_secret_key, nullptr);
ck_assert_msg(pk_equal(tcp_server_public_key(tcp_s), self_public_key), "Wrong public key");

TCP_Proxy_Info proxy_info;
proxy_info.proxy_type = TCP_PROXY_NONE;
crypto_new_keypair(self_public_key, self_secret_key);
TCP_Connections *tc_1 = new_tcp_connections(logger, mono_time, self_secret_key, &proxy_info);
TCP_Connections *tc_1 = new_tcp_connections(logger, mono_time, ns, self_secret_key, &proxy_info);
ck_assert_msg(pk_equal(tcp_connections_public_key(tc_1), self_public_key), "Wrong public key");

crypto_new_keypair(self_public_key, self_secret_key);
TCP_Connections *tc_2 = new_tcp_connections(logger, mono_time, self_secret_key, &proxy_info);
TCP_Connections *tc_2 = new_tcp_connections(logger, mono_time, ns, self_secret_key, &proxy_info);
ck_assert_msg(pk_equal(tcp_connections_public_key(tc_2), self_public_key), "Wrong public key");

IP_Port ip_port_tcp_s;
Expand Down
5 changes: 3 additions & 2 deletions auto_tests/auto_test_support.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -208,8 +208,9 @@ static void initialise_autotox(struct Tox_Options *options, AutoTox *autotox, ui
const Run_Auto_Options *autotest_opts)
{
autotox->index = index;
autotox->tox = tox_new_log(options, nullptr, &autotox->index);
ck_assert_msg(autotox->tox != nullptr, "failed to create tox instance #%u", index);
Tox_Err_New err;
autotox->tox = tox_new_log(options, &err, &autotox->index);
ck_assert_msg(autotox->tox != nullptr, "failed to create tox instance #%u (error = %d)", index, err);

set_mono_time_callback(autotox);

Expand Down
8 changes: 4 additions & 4 deletions auto_tests/network_test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ static void test_addr_resolv_localhost(void)
IP ip;
ip_init(&ip, 0); // ipv6enabled = 0

int res = addr_resolve(localhost, &ip, nullptr);
int res = addr_resolve_or_parse_ip(localhost, &ip, nullptr);

int error = net_error();
char *strerror = net_new_strerror(error);
Expand All @@ -39,14 +39,14 @@ static void test_addr_resolv_localhost(void)
ip_ntoa(&ip, ip_str, sizeof(ip_str)));

ip_init(&ip, 1); // ipv6enabled = 1
res = addr_resolve(localhost, &ip, nullptr);
res = addr_resolve_or_parse_ip(localhost, &ip, nullptr);

#if USE_IPV6

int localhost_split = 0;

if (!(res & TOX_ADDR_RESOLVE_INET6)) {
res = addr_resolve("ip6-localhost", &ip, nullptr);
res = addr_resolve_or_parse_ip("ip6-localhost", &ip, nullptr);
localhost_split = 1;
}

Expand All @@ -72,7 +72,7 @@ static void test_addr_resolv_localhost(void)
ip.family = net_family_unspec;
IP extra;
ip_reset(&extra);
res = addr_resolve(localhost, &ip, &extra);
res = addr_resolve_or_parse_ip(localhost, &ip, &extra);
error = net_error();
strerror = net_new_strerror(error);
ck_assert_msg(res > 0, "Resolver failed: %d, %s", error, strerror);
Expand Down
6 changes: 4 additions & 2 deletions auto_tests/onion_test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -182,7 +182,8 @@ static void send_onion_packet(const Networking_Core *net, const Onion_Path *path
*/
static Networking_Core *new_networking(const Logger *log, const IP *ip, uint16_t port)
{
return new_networking_ex(log, ip, port, port + (TOX_PORTRANGE_TO - TOX_PORTRANGE_FROM), nullptr);
const Network *ns = &system_network;
return new_networking_ex(log, ns, ip, port, port + (TOX_PORTRANGE_TO - TOX_PORTRANGE_FROM), nullptr);
}

static void test_basic(void)
Expand Down Expand Up @@ -426,7 +427,8 @@ static Onions *new_onions(uint16_t port, uint32_t *index)
}

TCP_Proxy_Info inf = {{{{0}}}};
on->onion_c = new_onion_client(on->log, on->mono_time, new_net_crypto(on->log, on->mono_time, dht, &inf));
const Network *ns = &system_network;
on->onion_c = new_onion_client(on->log, on->mono_time, new_net_crypto(on->log, on->mono_time, ns, dht, &inf));

if (!on->onion_c) {
kill_onion_announce(on->onion_a);
Expand Down
7 changes: 4 additions & 3 deletions other/DHT_bootstrap.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -145,7 +145,8 @@ int main(int argc, char *argv[])
Mono_Time *mono_time = mono_time_new();
const uint16_t start_port = PORT;
const uint16_t end_port = start_port + (TOX_PORTRANGE_TO - TOX_PORTRANGE_FROM);
DHT *dht = new_dht(logger, mono_time, new_networking_ex(logger, &ip, start_port, end_port, nullptr), true, true);
const Network *ns = &system_network;
DHT *dht = new_dht(logger, mono_time, new_networking_ex(logger, ns, &ip, start_port, end_port, nullptr), true, true);
Onion *onion = new_onion(logger, mono_time, dht);
const Onion_Announce *onion_a = new_onion_announce(logger, mono_time, dht);

Expand All @@ -166,7 +167,7 @@ int main(int argc, char *argv[])
#ifdef TCP_RELAY_ENABLED
#define NUM_PORTS 3
uint16_t ports[NUM_PORTS] = {443, 3389, PORT};
TCP_Server *tcp_s = new_TCP_server(logger, ipv6enabled, NUM_PORTS, ports, dht_get_self_secret_key(dht), onion);
TCP_Server *tcp_s = new_TCP_server(logger, ns, ipv6enabled, NUM_PORTS, ports, dht_get_self_secret_key(dht), onion);

if (tcp_s == nullptr) {
printf("TCP server failed to initialize.\n");
Expand Down Expand Up @@ -220,7 +221,7 @@ int main(int argc, char *argv[])
int is_waiting_for_dht_connection = 1;

uint64_t last_LANdiscovery = 0;
const Broadcast_Info *broadcast = lan_discovery_init();
const Broadcast_Info *broadcast = lan_discovery_init(ns);

while (1) {
mono_time_update(mono_time);
Expand Down
2 changes: 1 addition & 1 deletion other/bootstrap_daemon/docker/tox-bootstrapd.sha256
View file
Original file line number Diff line number Diff line change
@@ -1 +1 @@
0bec5d4230562fff1e3b0d5902e95d168eab233ca0232d3fd62705c91c91f580 /usr/local/bin/tox-bootstrapd
f76ac08c0a5494ac4e3f757d136786ed0a75ce084786d398e64d1c2ee498150d /usr/local/bin/tox-bootstrapd
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