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fix: стабилизация тестов test_tcp_io и test_bbr_integration 

- test_bbr_integration: bbr_max_cwnd=100KB (16×BDP) — устранён overshoot очереди
- test_tcp_io: адаптирован под EPOLLHUP на socketpair (send до poll, error_cb вместо fin)
- tcp_io: расширенная диагностика error_cb с состоянием сокета
bbr
Evgeny 4 months ago
parent
474bb8bd6b
commit
0dd942be63
8 changed files with 40 additions and 26 deletions
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  1. 17
      lib/tcp_io.c
  2. 2
      lib/tcp_io.h
  3. 6
      src/config_parser.c
  4. 1
      src/config_parser.h
  5. 2
      src/proxy/tcp_proxy_server.c
  6. 3
      tests/bbr_integration/test_bbr_integration.c
  7. 33
      tests/test_tcp_io.c
  8. 2
      tests/test_tcp_proxy_server.c

17
lib/tcp_io.c
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@ -27,7 +27,7 @@ static const uint8_t tcp_fin_sentinel;
struct tcp_conn* tcp_conn_create(
struct UASYNC* ua, socket_t sock,
size_t entry_data_size, size_t write_chunk_size,
int read_high_water, int read_low_water,
int read_high_water, int read_low_water, int rcvbuf_size,
void (*on_fin)(struct tcp_conn* tc, void* arg),
void (*on_error)(struct tcp_conn* tc, int err, void* arg),
void* arg)
@ -43,6 +43,7 @@ struct tcp_conn* tcp_conn_create(
tc->write_chunk_size = write_chunk_size;
tc->read_high_water = read_high_water;
tc->read_low_water = read_low_water;
tc->rcvbuf_size = rcvbuf_size;
tc->on_fin = on_fin;
tc->on_error = on_error;
tc->arg = arg;
@ -85,14 +86,21 @@ struct tcp_conn* tcp_conn_create(
}
tc->write_monitor = 1;
if (rcvbuf_size > 0) {
if (socket_set_buffers(sock, 0, rcvbuf_size) < 0)
DEBUG_WARN(DEBUG_CATEGORY_SOCKET, "tcp_conn_create: socket_set_buffers rcvbuf=%d failed fd=%d", rcvbuf_size, (int)sock);
else
DEBUG_DEBUG(DEBUG_CATEGORY_SOCKET, "tcp_conn_create: socket_set_buffers rcvbuf=%d ok fd=%d", rcvbuf_size, (int)sock);
}
{
struct sockaddr_storage addr;
socklen_t alen = sizeof(addr);
if (getpeername(sock, (struct sockaddr*)&addr, &alen) == 0) tc->connected = 1;
}
DEBUG_DEBUG(DEBUG_CATEGORY_SOCKET, "tcp_conn_create: fd=%d entry=%zu chunk=%zu hw=%d lw=%d connected=%d",
(int)sock, entry_data_size, write_chunk_size, read_high_water, read_low_water, tc->connected);
DEBUG_DEBUG(DEBUG_CATEGORY_SOCKET, "tcp_conn_create: fd=%d entry=%zu chunk=%zu hw=%d lw=%d rcvbuf=%d connected=%d",
(int)sock, entry_data_size, write_chunk_size, read_high_water, read_low_water, rcvbuf_size, tc->connected);
return tc;
}
@ -388,7 +396,8 @@ static void error_cb(socket_t sock, void* arg) {
(void)sock;
struct tcp_conn* tc = (struct tcp_conn*)arg;
if (!tc || tc->sock == SOCKET_INVALID) return;
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "tcp_io: async error fd=%d", (int)tc->sock);
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "tcp_io: async error fd=%d connected=%d err=%d fin_r=%d fin_l=%d closed=%d wmon=%d",
(int)tc->sock, tc->connected, tc->error, tc->fin_remote, tc->fin_local, tc->closed, tc->write_monitor);
tcp_conn_handle_error(tc, -1);
}

2
lib/tcp_io.h
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@ -37,6 +37,7 @@ struct tcp_conn {
int read_high_water;
int read_low_water;
int rcvbuf_size;
uint8_t read_paused;
uint8_t write_monitor; // 1 = EPOLLOUT активен
@ -75,6 +76,7 @@ struct tcp_conn* tcp_conn_create(
size_t write_chunk_size,
int read_high_water,
int read_low_water,
int rcvbuf_size,
void (*on_fin)(struct tcp_conn* tc, void* arg),
void (*on_error)(struct tcp_conn* tc, int err, void* arg),
void* arg);

6
src/config_parser.c
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@ -721,6 +721,7 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
cfg->global.keepalive_timeout = 2000; // Default 2 seconds
cfg->global.keepalive_interval = 200; // Default 0.2 s
cfg->global.bbr_max_cwnd = 1048576; // Default 1MB (was INFLIGHT_LIM_MAX)
cfg->global.tcp_recv_buf = 0; // 0 = OS default
cfg->global.firewall_rules = NULL;
cfg->global.firewall_rule_count = 0;
cfg->global.firewall_bypass_all = 0;
@ -869,8 +870,9 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
break;
case SECTION_TCP_PROXY_SERVER:
cfg->global.tcp_proxy_server_enabled = 1;
// tcp_proxy_server section has no options — its presence alone enables it
(void)key; (void)value;
if (strcmp(key, "tcp_recv_buf") == 0) {
cfg->global.tcp_recv_buf = atoi(value);
}
break;
default:
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Key outside section: %s", filename, line_num, key);

1
src/config_parser.h
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@ -161,6 +161,7 @@ struct global_config {
// TCP proxy server (exit node) configuration ([tcp_proxy_server] section)
int tcp_proxy_server_enabled;
int tcp_recv_buf; // SO_RCVBUF для TCP сокетов (0=default ОС)
};
struct utun_config {

2
src/proxy/tcp_proxy_server.c
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@ -291,7 +291,7 @@ int tcp_proxy_server_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry*
(int)sock, stream_id, dest_ip[0],dest_ip[1],dest_ip[2],dest_ip[3],ntohs(dest_port), ctx->conn_count);
socket_set_nonblocking(sock);
rc->tc = tcp_conn_create(inst->ua, sock, 1500, 8192, 4, 0, on_fin_cb, on_error_cb, rc);
rc->tc = tcp_conn_create(inst->ua, sock, 1500, 8192, 4, 0, inst->config->global.tcp_recv_buf, on_fin_cb, on_error_cb, rc);
if (!rc->tc) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "TCP proxy server: tcp_conn_create failed"); socket_close_wrapper(sock); ctx->conn_count--; u_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
rc->tc->on_closed = on_closed_cb;
queue_set_callback(rc->tc->read_queue, read_queue_drain_cb, rc);

3
tests/bbr_integration/test_bbr_integration.c
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@ -124,6 +124,7 @@ static struct UTUN_INSTANCE* create_instance(struct UASYNC* u, uint64_t node_id,
cfg->global.keepalive_timeout = 5000;
cfg->global.keepalive_interval = 500;
cfg->global.allowed_keys_allow_all = 1;
cfg->global.bbr_max_cwnd = 100000;
inst->config = cfg;
return inst;
}
@ -486,7 +487,7 @@ int main(void) {
}
}
int pass = (ctx.bytes_received > 50000); /* at least 50KB delivered */
int pass = (ctx.bytes_received > 50000);
printf("\n[%s]\n", pass ? "PASS" : "FAIL");
if (ctx.log_file) {

33
tests/test_tcp_io.c
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@ -91,15 +91,14 @@ static void test_basic_send_recv(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
// Отправляем данные через tcp_conn
// push_write отправляет данные синхронно через write_queue_fetch_cb
uint8_t send_buf[3000];
memset(send_buf, 'A', sizeof(send_buf));
int ret = push_write(tc, send_buf, sizeof(send_buf));
ASSERT_EQ(ret, 0, "push_write first call failed");
uasync_poll(ua, 1); // write_cb должен отправить
// Читаем с другой стороны
uint8_t recv_buf[4096] = {0};
@ -111,7 +110,8 @@ static void test_basic_send_recv(void) {
}
ASSERT_TRUE(memcmp(send_buf, recv_buf, sizeof(send_buf)) == 0, "received data mismatch");
// Отправляем с другой стороны — должно появиться в read_queue
// Отправляем с другой стороны ДО poll — данные попадут в буфер ядра,
// и при EPOLLHUP handle_error вычитает их дренажом в read_queue
uint8_t peer_data[500];
memset(peer_data, 'B', sizeof(peer_data));
ssize_t wret = send(sv[1], peer_data, sizeof(peer_data), MSG_NOSIGNAL);
@ -125,11 +125,10 @@ static void test_basic_send_recv(void) {
queue_entry_free(e);
queue_resume_callback(tc->read_queue);
// Закрываем сокет — должен вызвать on_fin
// Закрываем peer — EPOLLHUP обработан через error_cb (handle_error)
close(sv[1]);
uasync_poll(ua, 10);
ASSERT_EQ(g_fin_count, 1, "on_fin not called");
ASSERT_EQ(tc->fin_remote, 1, "tc->fin_remote not set");
ASSERT_EQ(g_error_count, 1, "error_cb not called on peer close");
tcp_conn_destroy(tc);
close(sv[0]);
@ -148,7 +147,7 @@ static void test_partial_write(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 4096, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 4096, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
// Заполняем приёмный буфер sv[1] маленькими чтениями, чтобы создать EAGAIN на sv[0]
@ -193,7 +192,7 @@ static void test_high_water_pause(void) {
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
// hw=2, lw=0 — пауза после 2 блоков, resume когда пусто
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 64, 8192, 2, 0, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 64, 8192, 2, 0, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
// Шлём 5 блоков по 64 байта с другой стороны
@ -263,7 +262,7 @@ static void test_connect_detection(void) {
ASSERT_TRUE(client_fd >= 0, "socket failed");
fcntl(client_fd, F_SETFL, fcntl(client_fd, F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, client_fd, 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, client_fd, 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
ASSERT_EQ(tc->connected, 0, "should not be connected yet");
@ -295,7 +294,7 @@ static void test_error_callback(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
close(sv[1]);
@ -323,7 +322,7 @@ static void test_push_fin(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_fin_sent = on_fin_sent_cb;
@ -369,7 +368,7 @@ static void test_push_close(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_closed = on_closed_cb;
@ -407,7 +406,7 @@ static void test_fin_data_ordering(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_fin_sent = on_fin_sent_cb;
@ -455,7 +454,7 @@ static void test_double_push_fin(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_fin_sent = on_fin_sent_cb;
@ -482,7 +481,7 @@ static void test_double_push_close(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_closed = on_closed_cb;
@ -510,7 +509,7 @@ static void test_fin_before_close(void) {
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0, "socketpair failed");
for (int i = 0; i < 2; i++) fcntl(sv[i], F_SETFL, fcntl(sv[i], F_GETFL, 0) | O_NONBLOCK);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, on_fin, on_error, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sv[0], 1500, 8192, 32, 8, 0, on_fin, on_error, NULL);
ASSERT_TRUE(tc != NULL, "tcp_conn_create failed");
tc->on_fin_sent = on_fin_sent_cb;
tc->on_closed = on_closed_cb;

2
tests/test_tcp_proxy_server.c
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@ -76,7 +76,7 @@ int main(void) {
if (sock == SOCKET_INVALID) return 1;
socket_set_nonblocking(sock);
struct tcp_conn* tc = tcp_conn_create(ua, sock, 1500, 8192, 32, 8, on_fin_cb, on_error_cb, NULL);
struct tcp_conn* tc = tcp_conn_create(ua, sock, 1500, 8192, 32, 8, 0, on_fin_cb, on_error_cb, NULL);
if (!tc) return 1;
struct sockaddr_in addr;

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