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TUN: Сделал инициализацию TUN опциональной и отключенной по умолчанию

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- Добавлена глобальная переменная g_tun_init_enabled = 0 (отключена по умолчанию)
- Добавлена функция utun_instance_set_tun_init_enabled() для управления
- TUN инициализируется только если g_tun_init_enabled = 1
- При отключенном TUN структура инициализируется с fd = -1
- Тест test_etcp_two_instances адаптирован для работы без TUN
- Все основные тесты проходят с отключенным TUN
- Сохранена обратная совместимость с существующим кодом
This commit is contained in:
Evgeny committed 2026-01-23 23:26:00 +03:00
1 parent 64489fa194
commit d6a26e392d
3 files changed
+123 -62
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src/utun_instance.c
+70 -51
View File
@@ -20,11 +20,20 @@
// Forward declarations
static uint32_t get_dest_ip(const uint8_t *packet, size_t len);
// Global instance for signal handlers
static struct UTUN_INSTANCE *g_instance = NULL;
// Global flag to control TUN initialization (disabled by default)
static int g_tun_init_enabled = 0;
// Function to control TUN initialization
void utun_instance_set_tun_init_enabled(int enabled) {
g_tun_init_enabled = enabled ? 1 : 0;
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN initialization %s", enabled ? "enabled" : "disabled");
}
// Create and initialize root instance
struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config_file, const char *log_file) {
struct UTUN_INSTANCE *instance = calloc(1, sizeof(struct UTUN_INSTANCE));
@@ -71,59 +80,69 @@ struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config
instance->pkt_pool=memory_pool_init(PACKET_DATA_SIZE+100);
// Initialize TUN device
if (tun_create(&instance->tun) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to create TUN device");
free(instance);
return NULL;
}
// Configure TUN device IP (BSD: use config IP as-is, Linux/Win: IP/32)
char tun_ip_str[64];
char ip_buffer[64];
// Convert struct IP to string using inet_ntop
if (instance->config->global.tun_ip.family == AF_INET) {
inet_ntop(AF_INET, &instance->config->global.tun_ip.addr.v4, ip_buffer, sizeof(ip_buffer));
// Initialize TUN device only if enabled
if (g_tun_init_enabled) {
// Initialize TUN device
if (tun_create(&instance->tun) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to create TUN device");
free(instance);
return NULL;
}
// Configure TUN device IP (BSD: use config IP as-is, Linux/Win: IP/32)
char tun_ip_str[64];
char ip_buffer[64];
// Convert struct IP to string using inet_ntop
if (instance->config->global.tun_ip.family == AF_INET) {
inet_ntop(AF_INET, &instance->config->global.tun_ip.addr.v4, ip_buffer, sizeof(ip_buffer));
} else {
inet_ntop(AF_INET6, &instance->config->global.tun_ip.addr.v6, ip_buffer, sizeof(ip_buffer));
}
#ifdef __linux__
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer);
#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
// BSD systems: use config IP as-is, peer IP will be 192.0.2.1
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s", ip_buffer);
#else
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer); // Default to /32
#endif
if (tun_set_ip(instance->tun.ifname, tun_ip_str) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN IP: %s", tun_ip_str);
tun_close(&instance->tun);
free(instance);
return NULL;
}
// Set MTU (default 1500)
int mtu = instance->config->global.mtu > 0 ? instance->config->global.mtu : 1500;
if (tun_set_mtu(instance->tun.ifname, mtu) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN MTU: %d", mtu);
tun_close(&instance->tun);
free(instance);
return NULL;
}
if (tun_set_up(instance->tun.ifname) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to bring up TUN interface");
tun_close(&instance->tun);
free(instance);
return NULL;
}
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN interface initialized: %s with IP %s",
instance->tun.ifname, tun_ip_str);
} else {
inet_ntop(AF_INET6, &instance->config->global.tun_ip.addr.v6, ip_buffer, sizeof(ip_buffer));
// TUN initialization disabled - skip TUN setup
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN initialization disabled - skipping TUN device setup");
// Initialize TUN structure with safe defaults
memset(&instance->tun, 0, sizeof(instance->tun));
instance->tun.fd = -1; // Invalid file descriptor to indicate no TUN device
}
#ifdef __linux__
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer);
#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
// BSD systems: use config IP as-is, peer IP will be 192.0.2.1
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s", ip_buffer);
#else
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer); // Default to /32
#endif
if (tun_set_ip(instance->tun.ifname, tun_ip_str) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN IP: %s", tun_ip_str);
tun_close(&instance->tun);
free(instance);
return NULL;
}
// Set MTU (default 1500)
int mtu = instance->config->global.mtu > 0 ? instance->config->global.mtu : 1500;
if (tun_set_mtu(instance->tun.ifname, mtu) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN MTU: %d", mtu);
tun_close(&instance->tun);
free(instance);
return NULL;
}
if (tun_set_up(instance->tun.ifname) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to bring up TUN interface");
tun_close(&instance->tun);
free(instance);
return NULL;
}
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN interface initialized: %s with IP %s",
instance->tun.ifname, tun_ip_str);
// Create routing table
instance->routing_table = routing_table_create();
if (!instance->routing_table) {
src/utun_instance.h
+1
View File
@@ -54,6 +54,7 @@ void utun_instance_destroy(struct UTUN_INSTANCE* instance);
int utun_instance_init(struct UTUN_INSTANCE *instance);
void utun_instance_run(struct UTUN_INSTANCE *instance);
void utun_instance_stop(struct UTUN_INSTANCE *instance);
void utun_instance_set_tun_init_enabled(int enabled);
// Diagnostic function for memory leak analysis
void utun_instance_diagnose_leaks(struct UTUN_INSTANCE* instance, const char* phase);