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refactor tcp_proxy: remove local socket mode, simplify architecture 

- remove sock_transport, transport abstraction, active connections API
- simplify proxy_conn to 13 fields (was 15), remove tcp_proxy_mapping linked list
- new protocol: stream_id 4B, seq 2B cyclic, HDR_SIZE 8B
- add ERROR subcmd for immediate abort, CLOSE for graceful half-close
- proper half-close: shutdown SHUT_WR, keep reading, no timer
- exhaustive DEBUG_ERROR/WARN on all error/unusual branches
- config parser: report unknown options with filename:line and valid keys
congestion
Evgeny 4 months ago
parent
c3eccd7b35
commit
e5d11ef9c1
10 changed files with 493 additions and 958 deletions
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  1. 67
      src/config_parser.c
  2. 3
      src/config_parser.h
  3. 216
      src/remote_proxy.c
  4. 34
      src/remote_proxy.h
  5. 859
      src/tcp_proxy.c
  6. 112
      src/tcp_proxy.h
  7. 2
      src/utun_instance.c
  8. 6
      tests/test_remote_proxy.c
  9. 144
      tests/test_tcp_proxy.c
  10. 8
      tests/test_tcp_proxy_remote.c

67
src/config_parser.c
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@ -342,7 +342,7 @@ static struct CFG_SERVER* find_server_by_name(struct CFG_SERVER *servers, const
return NULL; return NULL;
} }
static int parse_global(const char *key, const char *value, struct global_config *global) { static int parse_global(const char *key, const char *value, struct global_config *global, const char *filename, int line_num) {
if (strcmp(key, "my_node_name") == 0) { if (strcmp(key, "my_node_name") == 0) {
return assign_string(global->name, sizeof(global->name), value); return assign_string(global->name, sizeof(global->name), value);
} }
@ -411,10 +411,11 @@ static int parse_global(const char *key, const char *value, struct global_config
global->tun_test_mode = atoi(value); global->tun_test_mode = atoi(value);
return 0; return 0;
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown global option '%s'. Valid: my_node_name, my_private_key, my_public_key, my_node_id, tun_ifname, tun_ip, mtu, keepalive_timeout, keepalive_interval, inflight_min_bytes, inflight_max_bytes, debug_level, log_file, enable_timestamp, enable_function_names, enable_file_lines, enable_colors, tun_test_mode", filename, line_num, key);
return -1;
} }
static int parse_control(const char *key, const char *value, struct global_config *global) { static int parse_control(const char *key, const char *value, struct global_config *global, const char *filename, int line_num) {
if (strcmp(key, "ip") == 0 || strcmp(key, "control_ip") == 0) { if (strcmp(key, "ip") == 0 || strcmp(key, "control_ip") == 0) {
strncpy(global->control_ip, value, sizeof(global->control_ip) - 1); strncpy(global->control_ip, value, sizeof(global->control_ip) - 1);
global->control_ip[sizeof(global->control_ip) - 1] = '\0'; global->control_ip[sizeof(global->control_ip) - 1] = '\0';
@ -435,10 +436,11 @@ static int parse_control(const char *key, const char *value, struct global_confi
if (strcmp(key, "allow") == 0 || strcmp(key, "control_allow") == 0) { if (strcmp(key, "allow") == 0 || strcmp(key, "control_allow") == 0) {
return parse_control_allow(value, global); return parse_control_allow(value, global);
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown control option '%s'. Valid: ip/control_ip, port/control_port, allow/control_allow", filename, line_num, key);
return -1;
} }
static int parse_tcp_proxy(const char *key, const char *value, struct global_config *global) { static int parse_tcp_proxy(const char *key, const char *value, struct global_config *global, const char *filename, int line_num) {
if (strcmp(key, "enabled") == 0) { if (strcmp(key, "enabled") == 0) {
global->tcp_proxy_enabled = strcasecmp(value, "yes") == 0 || strcasecmp(value, "1") == 0 || strcasecmp(value, "true") == 0; global->tcp_proxy_enabled = strcasecmp(value, "yes") == 0 || strcasecmp(value, "1") == 0 || strcasecmp(value, "true") == 0;
return 0; return 0;
@ -455,10 +457,6 @@ static int parse_tcp_proxy(const char *key, const char *value, struct global_con
global->tcp_proxy_mtu = atoi(value); global->tcp_proxy_mtu = atoi(value);
return 0; return 0;
} }
if (strcmp(key, "eim_timeout") == 0) {
global->tcp_proxy_eim_timeout = atoi(value);
return 0;
}
if (strcmp(key, "via_node") == 0) { if (strcmp(key, "via_node") == 0) {
global->tcp_proxy_via_node_id = strtoull(value, NULL, 16); global->tcp_proxy_via_node_id = strtoull(value, NULL, 16);
return 0; return 0;
@ -499,10 +497,11 @@ static int parse_tcp_proxy(const char *key, const char *value, struct global_con
global->tcp_proxy_mapping_count++; global->tcp_proxy_mapping_count++;
return 0; return 0;
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown tcp_proxy option '%s'. Valid: enabled, tun_name, tun_ip, mtu, via_node, forward", filename, line_num, key);
return -1;
} }
static int parse_nat(const char *key, const char *value, struct global_config *global) { static int parse_nat(const char *key, const char *value, struct global_config *global, const char *filename, int line_num) {
if (strcmp(key, "tun_ifname") == 0) { if (strcmp(key, "tun_ifname") == 0) {
strncpy(global->nat_tun_ifname, value, sizeof(global->nat_tun_ifname) - 1); strncpy(global->nat_tun_ifname, value, sizeof(global->nat_tun_ifname) - 1);
return 0; return 0;
@ -565,15 +564,15 @@ static int parse_nat(const char *key, const char *value, struct global_config *g
global->nat_forwards[idx].internal_port_net = htons((uint16_t)atoi(int_port)); global->nat_forwards[idx].internal_port_net = htons((uint16_t)atoi(int_port));
global->nat_forwards[idx].external_port = (uint16_t)atoi(ext_port); global->nat_forwards[idx].external_port = (uint16_t)atoi(ext_port);
global->nat_forward_count++; global->nat_forward_count++;
DEBUG_INFO(DEBUG_CATEGORY_CONFIG, "NAT forward: %s %s:%s -> :%s", DEBUG_INFO(DEBUG_CATEGORY_CONFIG, "NAT forward: %s %s:%s -> :%s",
proto_str, ip_str, int_port, ext_port); proto_str, ip_str, int_port, ext_port);
return 0; return 0;
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown NAT option '%s'. Valid: tun_ifname, tun_ip, nat_via, port_start, port_end, forward", filename, line_num, key);
return -1;
} }
static int parse_server(const char *key, const char *value, struct CFG_SERVER *srv) { static int parse_server(const char *key, const char *value, struct CFG_SERVER *srv, const char *filename, int line_num) {
if (strcmp(key, "addr") == 0) { if (strcmp(key, "addr") == 0) {
if (strncmp(value, "temporary_ipv6:", 15) == 0) { if (strncmp(value, "temporary_ipv6:", 15) == 0) {
srv->ipv6_mode = CFG_IPV6_MODE_TEMPORARY; srv->ipv6_mode = CFG_IPV6_MODE_TEMPORARY;
@ -629,10 +628,11 @@ static int parse_server(const char *key, const char *value, struct CFG_SERVER *s
srv->only_local = atoi(value) ? 1 : 0; srv->only_local = atoi(value) ? 1 : 0;
return 0; return 0;
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown server option '%s'. Valid: addr, so_mark, fib, netif, type, mtu, only_local", filename, line_num, key);
return -1;
} }
static int parse_client(const char *key, const char *value, struct CFG_CLIENT *cli, struct CFG_SERVER *servers) { static int parse_client(const char *key, const char *value, struct CFG_CLIENT *cli, struct CFG_SERVER *servers, const char *filename, int line_num) {
if (strcmp(key, "link") == 0) { if (strcmp(key, "link") == 0) {
char link_copy[MAX_CONN_NAME_LEN + MAX_ADDR_LEN]; char link_copy[MAX_CONN_NAME_LEN + MAX_ADDR_LEN];
if (strlen(value) >= sizeof(link_copy)) return -1; if (strlen(value) >= sizeof(link_copy)) return -1;
@ -670,7 +670,8 @@ static int parse_client(const char *key, const char *value, struct CFG_CLIENT *c
return 0; return 0;
} }
return 0; DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown client option '%s'. Valid: link, peer_public_key, keepalive", filename, line_num, key);
return -1;
} }
static section_type_t parse_section_header(const char *line, char *name, size_t name_len) { static section_type_t parse_section_header(const char *line, char *name, size_t name_len) {
@ -788,18 +789,18 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
switch (cur_section) { switch (cur_section) {
case SECTION_GLOBAL: case SECTION_GLOBAL:
if (parse_global(key, value, &cfg->global) < 0) { if (parse_global(key, value, &cfg->global, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid global key '%s'", filename, line_num, key); // parse_global already printed the error
} }
break; break;
case SECTION_SERVER: case SECTION_SERVER:
if (cur_server && parse_server(key, value, cur_server) < 0) { if (cur_server && parse_server(key, value, cur_server, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid server key '%s'", filename, line_num, key); // parse_server already printed the error
} }
break; break;
case SECTION_CLIENT: case SECTION_CLIENT:
if (cur_client && parse_client(key, value, cur_client, cfg->servers) < 0) { if (cur_client && parse_client(key, value, cur_client, cfg->servers, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid client key '%s'", filename, line_num, key); // parse_client already printed the error
} }
break; break;
case SECTION_ROUTING: case SECTION_ROUTING:
@ -807,6 +808,8 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
add_route_entry(&cfg->route_subnets, value); add_route_entry(&cfg->route_subnets, value);
} else if (strcmp(key, "my_subnet") == 0) { } else if (strcmp(key, "my_subnet") == 0) {
add_route_entry(&cfg->my_subnets, value); add_route_entry(&cfg->my_subnets, value);
} else {
DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown routing option '%s'. Valid: route_subnet, my_subnet", filename, line_num, key);
} }
break; break;
case SECTION_DEBUG: case SECTION_DEBUG:
@ -826,11 +829,13 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
if (parse_firewall_rule(value, &cfg->global) < 0) { if (parse_firewall_rule(value, &cfg->global) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid firewall rule: %s", filename, line_num, value); DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid firewall rule: %s", filename, line_num, value);
} }
} else {
DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown firewall option '%s'. Valid: allow", filename, line_num, key);
} }
break; break;
case SECTION_CONTROL: case SECTION_CONTROL:
if (parse_control(key, value, &cfg->global) < 0) { if (parse_control(key, value, &cfg->global, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid control key '%s'", filename, line_num, key); // parse_control already printed the error
} }
break; break;
case SECTION_ALLOWED_KEYS: case SECTION_ALLOWED_KEYS:
@ -851,22 +856,26 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
cfg->global.allowed_keys = new_key; cfg->global.allowed_keys = new_key;
cfg->global.allowed_keys_count++; cfg->global.allowed_keys_count++;
} }
} else {
DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%d: Unknown allowed_keys option '%s'. Valid: allow_all, key", filename, line_num, key);
} }
break; break;
case SECTION_NAT: case SECTION_NAT:
cfg->global.nat_enabled = 1; cfg->global.nat_enabled = 1;
if (parse_nat(key, value, &cfg->global) < 0) { if (parse_nat(key, value, &cfg->global, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid NAT key '%s'", filename, line_num, key); // parse_nat already printed the error
} }
break; break;
case SECTION_TCP_PROXY: case SECTION_TCP_PROXY:
cfg->global.tcp_proxy_enabled = 1; cfg->global.tcp_proxy_enabled = 1;
if (parse_tcp_proxy(key, value, &cfg->global) < 0) { if (parse_tcp_proxy(key, value, &cfg->global, filename, line_num) < 0) {
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Invalid tcp_proxy key '%s'", filename, line_num, key); // parse_tcp_proxy already printed the error
} }
break; break;
case SECTION_REMOTE_PROXY: case SECTION_REMOTE_PROXY:
cfg->global.remote_proxy_enabled = 1; cfg->global.remote_proxy_enabled = 1;
// remote_proxy section has no options — its presence alone enables it
(void)key; (void)value;
break; break;
default: default:
DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Key outside section: %s", filename, line_num, key); DEBUG_WARN(DEBUG_CATEGORY_CONFIG, "%s:%d: Key outside section: %s", filename, line_num, key);

3
src/config_parser.h
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@ -156,8 +156,7 @@ struct global_config {
char tcp_proxy_tun_name[16]; char tcp_proxy_tun_name[16];
char tcp_proxy_tun_ip[64]; char tcp_proxy_tun_ip[64];
int tcp_proxy_mtu; int tcp_proxy_mtu;
int tcp_proxy_eim_timeout; uint64_t tcp_proxy_via_node_id; // через этот узел проксируются все forward-правила
uint64_t tcp_proxy_via_node_id; // через этот узел проксируются все forward-правила (0=локально)
struct tcp_proxy_mapping_config tcp_proxy_mappings[MAX_TCP_PROXY_MAPPINGS]; struct tcp_proxy_mapping_config tcp_proxy_mappings[MAX_TCP_PROXY_MAPPINGS];
int tcp_proxy_mapping_count; int tcp_proxy_mapping_count;

216
src/remote_proxy.c
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@ -7,6 +7,7 @@
#include "etcp_api.h" #include "etcp_api.h"
#include "etcp_router.h" #include "etcp_router.h"
#include "utun_instance.h" #include "utun_instance.h"
#include "config_parser.h"
#include "../lib/u_async.h" #include "../lib/u_async.h"
#include "../lib/debug_config.h" #include "../lib/debug_config.h"
#include "../lib/ll_queue.h" #include "../lib/ll_queue.h"
@ -27,36 +28,33 @@
static struct remote_proxy_ctx* g_rp_ctx = NULL; static struct remote_proxy_ctx* g_rp_ctx = NULL;
static void rp_sock_read_cb (socket_t sock, void* arg); static void rp_sock_read_cb(socket_t sock, void* arg);
static void rp_sock_write_cb(socket_t sock, void* arg); static void rp_sock_write_cb(socket_t sock, void* arg);
static void rp_sock_error_cb(socket_t sock, void* arg); static void rp_sock_error_cb(socket_t sock, void* arg);
static void rp_conn_free(struct remote_proxy_conn* rc); void rp_conn_free(struct remote_proxy_conn* rc);
static int rp_send_msg(struct UTUN_INSTANCE* inst, uint64_t dst, uint8_t subcmd, static int rp_send_msg(struct UTUN_INSTANCE* inst, uint64_t dst, uint8_t subcmd,
uint64_t sid, uint16_t seq, const uint8_t* data, size_t len) { uint32_t sid, uint16_t seq, const uint8_t* data, size_t len) {
struct ll_entry* e = queue_entry_new(0); struct ll_entry* e = queue_entry_new(0);
if (!e) return -1; if (!e) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "rp_send_msg: queue_entry_new failed subcmd=%02x sid=%08x", subcmd, sid); return -1; }
e->dgram = u_malloc(TCP_PROXY_HDR_SIZE + len); e->dgram = u_malloc(TCP_PROXY_HDR_SIZE + len);
if (!e->dgram) { queue_entry_free(e); return -1; } if (!e->dgram) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "rp_send_msg: malloc(%zu) failed subcmd=%02x sid=%08x", TCP_PROXY_HDR_SIZE + len, subcmd, sid); queue_entry_free(e); return -1; }
e->dgram[0] = ETCP_ID_TCP_PROXY; e->dgram[0] = ETCP_ID_TCP_PROXY;
e->dgram[1] = subcmd; e->dgram[1] = subcmd;
memcpy(e->dgram + 2, &sid, 8); memcpy(e->dgram + 2, &sid, 4);
memcpy(e->dgram + 10, &seq, 2); memcpy(e->dgram + 6, &seq, 2);
if (len > 0) memcpy(e->dgram + TCP_PROXY_HDR_SIZE, data, len); if (len > 0) memcpy(e->dgram + TCP_PROXY_HDR_SIZE, data, len);
e->len = TCP_PROXY_HDR_SIZE + len; e->len = TCP_PROXY_HDR_SIZE + len;
return etcp_route_send(inst, dst, e); return etcp_route_send(inst, dst, e);
} }
static int rp_send_connected(struct UTUN_INSTANCE* inst, uint64_t dst, uint64_t sid, static int rp_send_connected(struct UTUN_INSTANCE* inst, uint64_t dst, uint32_t sid,
uint16_t local_port, uint8_t status) { uint16_t local_port, uint8_t status) {
uint8_t buf[3]; uint8_t buf[3];
memcpy(buf, &local_port, 2); buf[2] = status; memcpy(buf, &local_port, 2); buf[2] = status;
return rp_send_msg(inst, dst, TCP_PROXY_SUBCMD_CONNECTED, sid, 0, buf, 3); return rp_send_msg(inst, dst, TCP_PROXY_SUBCMD_CONNECTED, sid, 0, buf, 3);
} }
// ====================================================================
// Socket event logging helper
// ====================================================================
static int rp_conn_total(struct remote_proxy_conn* rc) { static int rp_conn_total(struct remote_proxy_conn* rc) {
if (!rc || !rc->ctx) return 0; if (!rc || !rc->ctx) return 0;
int n = 0; struct remote_proxy_conn* c; int n = 0; struct remote_proxy_conn* c;
@ -69,64 +67,76 @@ static int rp_conn_total(struct remote_proxy_conn* rc) {
// ==================================================================== // ====================================================================
static void rp_sock_read_cb(socket_t sock, void* arg) { static void rp_sock_read_cb(socket_t sock, void* arg) {
(void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg; (void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg;
if (!rc || rc->sock == SOCKET_INVALID) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "RP rp_sock_read_cb: rc=%p sock=%d", (void*)rc, rc ? (int)rc->sock : -1); return; } if (!rc || rc->sock == SOCKET_INVALID) return;
uint8_t buf[8192]; ssize_t n = recv(rc->sock, buf, sizeof(buf), 0); uint8_t buf[8192]; ssize_t n = recv(rc->sock, buf, sizeof(buf), 0);
if (n > 0) { if (n > 0) {
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:RECV fd=%d stream=%016llx len=%zd total=%d", (int)rc->sock, (unsigned long long)rc->stream_id, n, rp_conn_total(rc));
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL; struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
if (inst) { if (!inst) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:RECV fd=%d sid=%08x — inst is NULL, drop", (int)rc->sock, rc->stream_id); return; }
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:RECV fd=%d sid=%08x len=%zd total=%d", (int)rc->sock, rc->stream_id, n, rp_conn_total(rc));
if (!rc->error) {
rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_DATA, rc->stream_id, rc->send_seq, buf, (size_t)n); rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_DATA, rc->stream_id, rc->send_seq, buf, (size_t)n);
rc->send_seq++; rc->send_seq++;
} }
} else { } else if (n == 0) {
if (n == 0) DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "remote_proxy: EOF stream=%016llx", (unsigned long long)rc->stream_id); DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:EOF fd=%d sid=%08x total=%d cli_closed=%d sock_closed=%d",
else DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: recv error %s", strerror(errno)); (int)rc->sock, rc->stream_id, rp_conn_total(rc), rc->cli_closed, rc->sock_closed);
rc->sock_closed = 1;
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL; struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
if (inst) rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_CLOSE, rc->stream_id, 0, NULL, 0); if (inst) rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_CLOSE, rc->stream_id, 0, NULL, 0);
rc->connected = -1; else DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:EOF fd=%d sid=%08x — inst is NULL, can't send CLOSE", (int)rc->sock, rc->stream_id);
if (rc->read_id) { uasync_remove_socket_t(rc->ua, rc->sock); rc->read_id = NULL; }
if (rc->cli_closed) rp_conn_free(rc);
} else if (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR) {
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:ERROR fd=%d sid=%08x errno=%d %s total=%d",
(int)rc->sock, rc->stream_id, errno, strerror(errno), rp_conn_total(rc));
rc->error = 1;
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
if (inst) rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_ERROR, rc->stream_id, 0, NULL, 0);
else DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:ERROR fd=%d sid=%08x — inst is NULL, can't send ERROR", (int)rc->sock, rc->stream_id);
rp_conn_free(rc); rp_conn_free(rc);
} }
} }
static void rp_sock_write_cb(socket_t sock, void* arg) { static void rp_sock_write_cb(socket_t sock, void* arg) {
(void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg; (void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg;
if (!rc || rc->sock == SOCKET_INVALID) return; if (!rc || rc->sock == SOCKET_INVALID || rc->connected) return;
if (!rc->connected) { int err = 0; socklen_t len = sizeof(err);
if (!rc->connect_called) return; if (getsockopt(rc->sock, SOL_SOCKET, SO_ERROR, &err, &len) == 0 && err == 0) {
int err = 0; socklen_t len = sizeof(err); rc->connected = 1;
if (getsockopt(rc->sock, SOL_SOCKET, SO_ERROR, &err, &len) == 0 && err == 0) { struct sockaddr_in local; socklen_t llen = sizeof(local);
rc->connected = 1; uint16_t local_port = 0;
struct sockaddr_in local; socklen_t llen = sizeof(local); if (getsockname(rc->sock, (struct sockaddr*)&local, &llen) == 0) local_port = local.sin_port;
uint16_t local_port = 0; DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:CONN fd=%d sid=%08x local=%d dest=%d.%d.%d.%d:%d total=%d",
if (getsockname(rc->sock, (struct sockaddr*)&local, &llen) == 0) local_port = local.sin_port; (int)rc->sock, rc->stream_id, ntohs(local_port),
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:CONN fd=%d stream=%016llx local=%d dest=%d.%d.%d.%d:%d total=%d", rc->dest_ip[0], rc->dest_ip[1], rc->dest_ip[2], rc->dest_ip[3], ntohs(rc->dest_port),
(int)rc->sock, (unsigned long long)rc->stream_id, ntohs(local_port), rp_conn_total(rc));
rc->dest_ip[0], rc->dest_ip[1], rc->dest_ip[2], rc->dest_ip[3], ntohs(rc->dest_port), struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
rp_conn_total(rc)); if (inst) rp_send_connected(inst, rc->peer_node_id, rc->stream_id, local_port, TCP_PROXY_CONNECTED_OK);
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL; } else {
if (inst) rp_send_connected(inst, rc->peer_node_id, rc->stream_id, local_port, TCP_PROXY_CONNECTED_OK); DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:FAIL fd=%d sid=%08x err=%d %s",
} else { (int)rc->sock, rc->stream_id, err, err ? strerror(err) : "unknown");
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: connect failed %s", err ? strerror(err) : "unknown"); struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL; if (inst) rp_send_connected(inst, rc->peer_node_id, rc->stream_id, 0, TCP_PROXY_CONNECTED_REFUSED);
if (inst) rp_send_connected(inst, rc->peer_node_id, rc->stream_id, 0, TCP_PROXY_CONNECTED_REFUSED); rp_conn_free(rc);
rc->connected = -1;
rp_conn_free(rc);
}
} }
} }
static void rp_sock_error_cb(socket_t sock, void* arg) { static void rp_sock_error_cb(socket_t sock, void* arg) {
(void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg; (void)sock; struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg;
if (!rc || rc->sock == SOCKET_INVALID) return; if (!rc || rc->sock == SOCKET_INVALID) return;
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: socket error stream=%016llx", (unsigned long long)(rc ? rc->stream_id : 0)); DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:ERR fd=%d sid=%08x", (int)rc->sock, rc->stream_id);
rc->connected = -1; rc->error = 1;
struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL; struct UTUN_INSTANCE* inst = rc->ctx ? rc->ctx->inst : NULL;
if (inst) rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_CLOSE, rc->stream_id, 0, NULL, 0); if (inst) rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_ERROR, rc->stream_id, 0, NULL, 0);
else DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "SOCK:ERR fd=%d sid=%08x — inst is NULL", (int)rc->sock, rc->stream_id);
rp_conn_free(rc); rp_conn_free(rc);
} }
static void rp_conn_free(struct remote_proxy_conn* rc) { void rp_conn_free(struct remote_proxy_conn* rc) {
if (!rc) return; if (!rc) return;
int total = rp_conn_total(rc);
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:FREE fd=%d sid=%08x total=%d cli_closed=%d sock_closed=%d error=%d",
(int)rc->sock, rc->stream_id, total, rc->cli_closed, rc->sock_closed, rc->error);
if (rc->ctx) { if (rc->ctx) {
struct remote_proxy_conn** prev = &rc->ctx->conns; struct remote_proxy_conn** prev = &rc->ctx->conns;
while (*prev) { if (*prev == rc) { *prev = rc->next; rc->ctx->conn_count--; break; } prev = &(*prev)->next; } while (*prev) { if (*prev == rc) { *prev = rc->next; rc->ctx->conn_count--; break; } prev = &(*prev)->next; }
@ -138,65 +148,47 @@ static void rp_conn_free(struct remote_proxy_conn* rc) {
u_free(rc); u_free(rc);
} }
// ====================================================================
// Standalone handler (registered when tcp_proxy doesn't have remote mappings)
// ====================================================================
static void rp_standalone_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry) {
struct UTUN_INSTANCE* i = conn ? conn->instance : (g_rp_ctx ? g_rp_ctx->inst : NULL);
if (!i || !entry || entry->dgram == NULL || entry->len < TCP_PROXY_HDR_SIZE) {
if (entry) { queue_dgram_free(entry); queue_entry_free(entry); }
return;
}
uint8_t subcmd = entry->dgram[1];
uint64_t sid = 0; memcpy(&sid, entry->dgram + 2, 8);
uint64_t src = conn ? conn->peer_node_id : i->node_id;
if (subcmd == TCP_PROXY_SUBCMD_CONNECT) { remote_proxy_handle_connect(i, entry, sid, src); return; }
if (subcmd == TCP_PROXY_SUBCMD_DATA) { remote_proxy_handle_data(i, entry, sid); return; }
if (subcmd == TCP_PROXY_SUBCMD_CLOSE) { remote_proxy_handle_close(i, sid); queue_dgram_free(entry); queue_entry_free(entry); return; }
queue_dgram_free(entry); queue_entry_free(entry);
}
// ==================================================================== // ====================================================================
// Public API // Public API
// ==================================================================== // ====================================================================
struct remote_proxy_conn* remote_proxy_find_conn(struct remote_proxy_ctx* ctx, uint64_t stream_id) { struct remote_proxy_conn* remote_proxy_find_conn(struct remote_proxy_ctx* ctx, uint32_t stream_id) {
struct remote_proxy_conn* c; struct remote_proxy_conn* c;
for (c = ctx->conns; c; c = c->next) if (c->stream_id == stream_id) return c; for (c = ctx->conns; c; c = c->next) if (c->stream_id == stream_id) return c;
return NULL; return NULL;
} }
int remote_proxy_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry* entry, int remote_proxy_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry* entry,
uint64_t stream_id, uint64_t src_node_id) { uint32_t stream_id, uint64_t src_node_id) {
if (!inst || !inst->remote_proxy.enabled) { queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (!inst || !inst->remote_proxy.enabled) { if (entry) { queue_dgram_free(entry); queue_entry_free(entry); } return -1; }
struct remote_proxy_ctx* ctx = &inst->remote_proxy; struct remote_proxy_ctx* ctx = &inst->remote_proxy;
if (entry->len < TCP_PROXY_CONNECT_HDR_SIZE) { queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (entry->len < TCP_PROXY_CONNECT_HDR_SIZE) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: CONNECT too short len=%u", entry->len); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
uint8_t* dest_ip = entry->dgram + TCP_PROXY_HDR_SIZE; uint8_t* dest_ip = entry->dgram + TCP_PROXY_HDR_SIZE;
uint16_t dest_port = 0; memcpy(&dest_port, dest_ip + 4, 2); uint16_t dest_port = 0; memcpy(&dest_port, dest_ip + 4, 2);
struct remote_proxy_conn* rc = u_calloc(1, sizeof(struct remote_proxy_conn)); struct remote_proxy_conn* rc = u_calloc(1, sizeof(struct remote_proxy_conn));
if (!rc) { queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (!rc) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: u_calloc failed for sid=%08x", stream_id); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
rc->ctx = ctx; rc->stream_id = stream_id; rc->peer_node_id = src_node_id; rc->ctx = ctx; rc->stream_id = stream_id; rc->peer_node_id = src_node_id;
memcpy(rc->dest_ip, dest_ip, 4); rc->dest_port = dest_port; memcpy(rc->dest_ip, dest_ip, 4); rc->dest_port = dest_port;
rc->ua = inst->ua; rc->sock = SOCKET_INVALID; rc->ua = inst->ua; rc->sock = SOCKET_INVALID;
rc->send_seq = 0; rc->recv_seq_init = 0;
rc->sock = socket(AF_INET, SOCK_STREAM, 0); rc->sock = socket(AF_INET, SOCK_STREAM, 0);
if (rc->sock == SOCKET_INVALID) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: socket() failed"); rp_conn_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (rc->sock == SOCKET_INVALID) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: socket() failed"); u_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
ctx->conn_count++; ctx->conn_count++;
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:NEW fd=%d stream=%016llx dest=%d.%d.%d.%d:%d total=%d", (int)rc->sock, (unsigned long long)stream_id, DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:NEW fd=%d sid=%08x dest=%d.%d.%d.%d:%d total=%d",
dest_ip[0],dest_ip[1],dest_ip[2],dest_ip[3],ntohs(dest_port), ctx->conn_count); (int)rc->sock, stream_id, dest_ip[0],dest_ip[1],dest_ip[2],dest_ip[3],ntohs(dest_port), ctx->conn_count);
socket_set_nonblocking(rc->sock); socket_set_nonblocking(rc->sock);
rc->read_id = uasync_add_socket_t(rc->ua, rc->sock, rp_sock_read_cb, rp_sock_write_cb, rp_sock_error_cb, rc); rc->read_id = uasync_add_socket_t(rc->ua, rc->sock, rp_sock_read_cb, rp_sock_write_cb, rp_sock_error_cb, rc);
if (!rc->read_id) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: uasync_add_socket_t failed"); rp_conn_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (!rc->read_id) { DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: uasync_add_socket_t failed"); u_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
struct sockaddr_in addr; memset(&addr, 0, sizeof(addr)); struct sockaddr_in addr; memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET; memcpy(&addr.sin_addr.s_addr, dest_ip, 4); addr.sin_port = dest_port; addr.sin_family = AF_INET; memcpy(&addr.sin_addr.s_addr, dest_ip, 4); addr.sin_port = dest_port;
rc->connect_called = 1;
int ret = connect(rc->sock, (struct sockaddr*)&addr, sizeof(addr)); int ret = connect(rc->sock, (struct sockaddr*)&addr, sizeof(addr));
if (ret < 0 && errno != EINPROGRESS) { if (ret < 0 && errno != EINPROGRESS) {
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: connect() failed: %s", strerror(errno)); DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: connect() to %d.%d.%d.%d:%d failed: %s",
dest_ip[0], dest_ip[1], dest_ip[2], dest_ip[3], ntohs(dest_port), strerror(errno));
rp_send_connected(inst, src_node_id, stream_id, 0, TCP_PROXY_CONNECTED_REFUSED); rp_send_connected(inst, src_node_id, stream_id, 0, TCP_PROXY_CONNECTED_REFUSED);
rp_conn_free(rc); queue_dgram_free(entry); queue_entry_free(entry); return -1; uasync_remove_socket_t(rc->ua, rc->sock); socket_close_wrapper(rc->sock); u_free(rc);
queue_dgram_free(entry); queue_entry_free(entry); return -1;
} }
rc->next = ctx->conns; ctx->conns = rc; rc->next = ctx->conns; ctx->conns = rc;
@ -204,90 +196,86 @@ int remote_proxy_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry* ent
return 0; return 0;
} }
int remote_proxy_handle_data(struct UTUN_INSTANCE* inst, struct ll_entry* entry, uint64_t stream_id) { int remote_proxy_handle_data(struct UTUN_INSTANCE* inst, struct ll_entry* entry, uint32_t stream_id) {
if (!inst) { queue_dgram_free(entry); queue_entry_free(entry); return -1; } if (!inst) { queue_dgram_free(entry); queue_entry_free(entry); return -1; }
struct remote_proxy_ctx* ctx = &inst->remote_proxy; struct remote_proxy_ctx* ctx = &inst->remote_proxy;
struct remote_proxy_conn* rc = remote_proxy_find_conn(ctx, stream_id); struct remote_proxy_conn* rc = remote_proxy_find_conn(ctx, stream_id);
if (!rc || rc->sock == SOCKET_INVALID || rc->connected != 1) { if (!rc || rc->sock == SOCKET_INVALID || rc->connected != 1) { DEBUG_WARN(DEBUG_CATEGORY_SOCKET, "RP handle_data drop: no active conn for sid=%08x", stream_id); queue_dgram_free(entry); queue_entry_free(entry); return -1; }
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "RP handle_data drop: rc=%p stream=%016llx sock=%d connected=%d", if (rc->error) { queue_dgram_free(entry); queue_entry_free(entry); return -1; }
(void*)rc, (unsigned long long)stream_id, rc ? (int)rc->sock : -1, rc ? rc->connected : -1);
queue_dgram_free(entry); queue_entry_free(entry); return -1; uint16_t seq; memcpy(&seq, entry->dgram + 6, 2);
} if (!rc->recv_init) {
uint16_t seq; memcpy(&seq, entry->dgram + 10, 2); rc->recv_last_seq = seq; rc->recv_init = 1;
if (!rc->recv_seq_init) {
rc->recv_last_seq = seq; rc->recv_seq_init = 1;
} else { } else {
int16_t delta = (int16_t)(seq - rc->recv_last_seq); uint16_t delta = seq - rc->recv_last_seq;
if (delta <= 0) { if (delta == 0) {
DEBUG_WARN(DEBUG_CATEGORY_SOCKET, "remote_proxy: duplicate DATA seq=%u stream=%016llx, discard", seq, (unsigned long long)stream_id); DEBUG_WARN(DEBUG_CATEGORY_SOCKET, "remote_proxy: duplicate DATA seq=%u sid=%08x", seq, stream_id);
queue_dgram_free(entry); queue_entry_free(entry); return 0; queue_dgram_free(entry); queue_entry_free(entry); return 0;
} }
if (delta > 1) { if (delta != 1) {
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: seq gap seq=%u last=%u stream=%016llx, tearing down", seq, rc->recv_last_seq, (unsigned long long)stream_id); DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: seq gap seq=%u last=%u sid=%08x", seq, rc->recv_last_seq, stream_id);
rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_CLOSE, rc->stream_id, 0, NULL, 0); rc->error = 1;
rp_send_msg(inst, rc->peer_node_id, TCP_PROXY_SUBCMD_ERROR, rc->stream_id, 0, NULL, 0);
rp_conn_free(rc); rp_conn_free(rc);
queue_dgram_free(entry); queue_entry_free(entry); return -1; queue_dgram_free(entry); queue_entry_free(entry); return -1;
} }
rc->recv_last_seq = seq; rc->recv_last_seq = seq;
} }
size_t data_len = entry->len - TCP_PROXY_HDR_SIZE; size_t data_len = entry->len - TCP_PROXY_HDR_SIZE;
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:SEND fd=%d stream=%016llx len=%zu total=%d", (int)rc->sock, (unsigned long long)stream_id, data_len, rp_conn_total(rc)); DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:SEND fd=%d sid=%08x len=%zu total=%d",
uint8_t* data = entry->dgram + TCP_PROXY_HDR_SIZE; (int)rc->sock, stream_id, data_len, rp_conn_total(rc));
ssize_t n = send(rc->sock, data, data_len, MSG_NOSIGNAL); if (data_len > 0) {
if (n < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { uint8_t* data = entry->dgram + TCP_PROXY_HDR_SIZE;
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: send error %s", strerror(errno)); ssize_t n = send(rc->sock, data, data_len, MSG_NOSIGNAL);
if (n < 0 && errno != EAGAIN && errno != EWOULDBLOCK) {
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "remote_proxy: send error %s", strerror(errno));
}
} }
queue_dgram_free(entry); queue_entry_free(entry); queue_dgram_free(entry); queue_entry_free(entry);
return 0; return 0;
} }
static void rp_close_timer_cb(void* arg) { void remote_proxy_handle_close(struct UTUN_INSTANCE* inst, uint32_t stream_id) {
struct remote_proxy_conn* rc = (struct remote_proxy_conn*)arg;
if (!rc || rc->connected == -1) return;
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:TIMER stream=%016llx total=%d", (unsigned long long)rc->stream_id, rp_conn_total(rc));
rp_conn_free(rc);
}
void remote_proxy_handle_close(struct UTUN_INSTANCE* inst, uint64_t stream_id) {
if (!inst) return; if (!inst) return;
struct remote_proxy_ctx* ctx = &inst->remote_proxy; struct remote_proxy_ctx* ctx = &inst->remote_proxy;
struct remote_proxy_conn** prev = &ctx->conns; struct remote_proxy_conn** prev = &ctx->conns;
while (*prev) { while (*prev) {
struct remote_proxy_conn* rc = *prev; struct remote_proxy_conn* rc = *prev;
if (rc->stream_id == stream_id) { if (rc->stream_id == stream_id) {
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:CLOSE fd=%d stream=%016llx total=%d", (int)rc->sock, (unsigned long long)stream_id, rp_conn_total(rc)); DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "SOCK:CLOSE_RECV fd=%d sid=%08x total=%d sock_closed=%d connected=%d",
*prev = rc->next; (int)rc->sock, stream_id, rp_conn_total(rc), rc->sock_closed, rc->connected);
rc->cli_closed = 1;
if (rc->sock != SOCKET_INVALID && rc->connected == 1) shutdown(rc->sock, SHUT_WR); if (rc->sock != SOCKET_INVALID && rc->connected == 1) shutdown(rc->sock, SHUT_WR);
if (rc->read_id) { uasync_remove_socket_t(rc->ua, rc->sock); rc->read_id = NULL; } if (rc->sock_closed) rp_conn_free(rc);
uasync_set_timeout(rc->ua, 20000, rc, rp_close_timer_cb, "rp_close");
return; return;
} }
prev = &rc->next; prev = &rc->next;
} }
DEBUG_WARN(DEBUG_CATEGORY_SOCKET, "remote_proxy: CLOSE sid=%08x — no conn", stream_id);
} }
int remote_proxy_init(struct UTUN_INSTANCE* inst) { int remote_proxy_init(struct UTUN_INSTANCE* inst) {
if (!inst) return -1; if (!inst) return -1;
struct remote_proxy_ctx* ctx = &inst->remote_proxy; struct remote_proxy_ctx* ctx = &inst->remote_proxy;
memset(ctx, 0, sizeof(*ctx)); memset(ctx, 0, sizeof(*ctx));
ctx->enabled = inst->config && inst->config->global.remote_proxy_enabled; if (!inst->config) return 0;
ctx->enabled = inst->config->global.remote_proxy_enabled;
ctx->inst = inst; ctx->inst = inst;
if (!ctx->enabled) return 0; if (!ctx->enabled) return 0;
g_rp_ctx = ctx; g_rp_ctx = ctx;
// Register standalone handler for when tcp_proxy is not using remote mappings etcp_router_bind(inst, ETCP_ID_TCP_PROXY, tcp_proxy_etcp_recv_cb);
// (tcp_proxy_create will overwrite this handler if it has remote mappings) if (!inst->config->global.tcp_proxy_enabled) {
etcp_router_bind(inst, ETCP_ID_TCP_PROXY, rp_standalone_recv_cb);
if (!inst->config || !inst->config->global.tcp_proxy_enabled) {
udp_proxy_init(inst, inst->ua); udp_proxy_init(inst, inst->ua);
icmp_proxy_init(inst, inst->ua); icmp_proxy_init(inst, inst->ua);
} }
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "remote_proxy initialized on node %016llx", (unsigned long long)inst->node_id); DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "remote_proxy initialized node=%016llx", (unsigned long long)inst->node_id);
return 0; return 0;
} }
void remote_proxy_destroy(struct UTUN_INSTANCE* inst) { void remote_proxy_destroy(struct UTUN_INSTANCE* inst) {
if (!inst) return; if (!inst) return;
struct remote_proxy_ctx* ctx = &inst->remote_proxy; struct remote_proxy_ctx* ctx = &inst->remote_proxy;
DEBUG_INFO(DEBUG_CATEGORY_SOCKET, "remote_proxy destroying: conn_count=%d", ctx->conn_count);
struct remote_proxy_conn* rc = ctx->conns; struct remote_proxy_conn* rc = ctx->conns;
while (rc) { struct remote_proxy_conn* next = rc->next; rp_conn_free(rc); rc = next; } while (rc) { struct remote_proxy_conn* next = rc->next; rp_conn_free(rc); rc = next; }
ctx->conns = NULL; ctx->enabled = 0; ctx->conns = NULL; ctx->enabled = 0;

34
src/remote_proxy.h
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@ -1,5 +1,4 @@
// remote_proxy.h — Удаленный TCP прокси (exit node) // remote_proxy.h — Удаленный TCP прокси (exit node)
// Создаёт OS сокеты к адресатам по запросам от других нод через etcp_router
#ifndef REMOTE_PROXY_H #ifndef REMOTE_PROXY_H
#define REMOTE_PROXY_H #define REMOTE_PROXY_H
@ -12,34 +11,38 @@ struct ll_entry;
struct ETCP_CONN; struct ETCP_CONN;
struct remote_proxy_ctx; struct remote_proxy_ctx;
// Sub-commands for ETCP_ID_TCP_PROXY protocol
#define TCP_PROXY_SUBCMD_CONNECT 0x01 #define TCP_PROXY_SUBCMD_CONNECT 0x01
#define TCP_PROXY_SUBCMD_CONNECTED 0x02 #define TCP_PROXY_SUBCMD_CONNECTED 0x02
#define TCP_PROXY_SUBCMD_DATA 0x03 #define TCP_PROXY_SUBCMD_DATA 0x03
#define TCP_PROXY_SUBCMD_CLOSE 0x04 #define TCP_PROXY_SUBCMD_CLOSE 0x04
#define TCP_PROXY_SUBCMD_ERROR 0x05
#define TCP_PROXY_CONNECTED_OK 0 #define TCP_PROXY_CONNECTED_OK 0
#define TCP_PROXY_CONNECTED_REFUSED 1 #define TCP_PROXY_CONNECTED_REFUSED 1
#define TCP_PROXY_HDR_SIZE 12 // svc_id(1)+subcmd(1)+stream_id(8)+seq(2) #define TCP_PROXY_HDR_SIZE 8 // svc_id(1)+subcmd(1)+stream_id(4)+seq(2)
#define TCP_PROXY_CONNECT_HDR_SIZE 18 // HDR_SIZE + dest_ip(4)+dest_port(2) #define TCP_PROXY_CONNECT_HDR_SIZE 14 // HDR_SIZE + dest_ip(4)+dest_port(2)
#define TCP_PROXY_CONNECTED_HDR_SIZE 15 // HDR_SIZE + local_port(2)+status(1) #define TCP_PROXY_CONNECTED_HDR_SIZE 11 // HDR_SIZE + local_port(2)+status(1)
struct remote_proxy_conn { struct remote_proxy_conn {
struct remote_proxy_conn* next; struct remote_proxy_conn* next;
struct remote_proxy_ctx* ctx; struct remote_proxy_ctx* ctx;
uint64_t stream_id; uint32_t stream_id;
uint64_t peer_node_id; uint64_t peer_node_id;
socket_t sock; socket_t sock;
void* read_id; void* read_id;
struct UASYNC* ua; struct UASYNC* ua;
int connected;
int connect_called;
uint8_t dest_ip[4]; uint8_t dest_ip[4];
uint16_t dest_port; uint16_t dest_port;
uint16_t send_seq;
uint16_t send_seq; // 16-bit circular
uint16_t recv_last_seq; uint16_t recv_last_seq;
uint8_t recv_seq_init; uint8_t recv_init;
uint8_t cli_closed; // client sent CLOSE
uint8_t sock_closed; // socket EOF received
uint8_t error;
uint8_t connected; // connect() completed successfully
}; };
struct remote_proxy_ctx { struct remote_proxy_ctx {
@ -52,11 +55,12 @@ struct remote_proxy_ctx {
int remote_proxy_init(struct UTUN_INSTANCE* inst); int remote_proxy_init(struct UTUN_INSTANCE* inst);
void remote_proxy_destroy(struct UTUN_INSTANCE* inst); void remote_proxy_destroy(struct UTUN_INSTANCE* inst);
struct remote_proxy_conn* remote_proxy_find_conn(struct remote_proxy_ctx* ctx, uint64_t stream_id); struct remote_proxy_conn* remote_proxy_find_conn(struct remote_proxy_ctx* ctx, uint32_t stream_id);
void rp_conn_free(struct remote_proxy_conn* rc);
int remote_proxy_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry* entry, int remote_proxy_handle_connect(struct UTUN_INSTANCE* inst, struct ll_entry* entry,
uint64_t stream_id, uint64_t src_node_id); uint32_t stream_id, uint64_t src_node_id);
int remote_proxy_handle_data(struct UTUN_INSTANCE* inst, struct ll_entry* entry, uint64_t stream_id); int remote_proxy_handle_data(struct UTUN_INSTANCE* inst, struct ll_entry* entry, uint32_t stream_id);
void remote_proxy_handle_close(struct UTUN_INSTANCE* inst, uint64_t stream_id); void remote_proxy_handle_close(struct UTUN_INSTANCE* inst, uint32_t stream_id);
#endif #endif

859
src/tcp_proxy.c
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112
src/tcp_proxy.h
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@ -1,6 +1,4 @@
// tcp_proxy.h — TCP proxy: lwIP TCP stack ↔ ll_queue ↔ transport → destination // tcp_proxy.h — TCP proxy: lwIP TCP stack → ETCP → remote exit node
// Modes: TUN (use_tun=1) or raw-fd (use_tun=0, socketpair etc.)
// Supports port forwarding + EIM NAT + half-close + active connections + remote proxy
#ifndef TCP_PROXY_H #ifndef TCP_PROXY_H
#define TCP_PROXY_H #define TCP_PROXY_H
@ -19,97 +17,59 @@ struct tcp_proxy_mapping_config;
struct remote_proxy_ctx; struct remote_proxy_ctx;
struct lwip_tcp_ctx; struct lwip_tcp_ctx;
// Transport abstraction (local OS socket or remote via ETCP)
struct tcp_proxy_transport;
struct tcp_proxy_transport_ops {
int (*send)(struct tcp_proxy_transport* t, const uint8_t* data, size_t len);
void (*close)(struct tcp_proxy_transport* t);
void (*destroy)(struct tcp_proxy_transport* t);
};
struct tcp_proxy_transport {
struct tcp_proxy_transport_ops* ops;
};
// Port mapping (static from config or dynamic from EIM NAT)
struct tcp_proxy_mapping {
struct tcp_proxy_mapping* next;
uint16_t local_port;
uint8_t remote_ip[4];
uint16_t remote_port;
int dynamic;
uint64_t created_tb;
uint64_t delete_at_tb;
};
// Forward declarations
struct tcp_pcb; struct tcp_pcb;
struct tcp_pcb_listen;
// One proxy connection: TCP PCB ↔ ll_queues ↔ transport ↔ destination
struct proxy_conn { struct proxy_conn {
struct proxy_conn* next; struct proxy_conn* next;
struct tcp_proxy* proxy; struct tcp_proxy* proxy;
struct tcp_pcb* pcb; struct tcp_pcb* pcb;
struct tcp_pcb_listen* listen_pcb; // for listening connection tracking
struct tcp_proxy_transport* transport; uint32_t stream_id;
struct ll_queue* uip_to_transport; // data: TCP → transport or remote→test (active) uint16_t send_seq; // 16-bit circular, only for DATA
struct ll_queue* transport_to_uip; // data: transport → TCP or test→remote (active) uint16_t recv_last_seq; // last received seq for gap detection
uint8_t dest_ip[4]; // proxy target IP (where to forward OS socket) uint8_t recv_init; // first DATA received
uint32_t tun_ip; // TUN IP (what client connected to, for uip_hostaddr)
uint16_t dest_port; struct ll_queue* to_lwip; // DATA from exit → lwIP (flow control)
int closing_tun; // 1 = TUN/lwIP side sent FIN (waiting for remote) uint8_t* send_buf; // lwIP→exit data until CONNECTED
int closing_rem; // 1 = remote/transport closed (waiting for TUN) uint16_t send_len;
int closing_sent; // 1 = CLOSE sent to exit via transport->close()
int active; // 1 = outgoing connection uint8_t tun_closed; // lwIP side sent FIN
struct tcp_proxy_mapping* eim_mapping; uint8_t rem_closed; // exit sent CLOSE
uint64_t remote_stream_id; // stream ID for remote proxy (0=local) uint8_t error; // error condition, cleanup immediately
void* uip_retry_timer; // timer for backpressure retry uint8_t close_sent; // we sent CLOSE/ERROR to exit
uint8_t connected; // CONNECTED(OK) received from exit
uint8_t dest_ip[4];
uint16_t dest_port;
}; };
// Main TCP proxy module
struct tcp_proxy { struct tcp_proxy {
struct UTUN_INSTANCE* inst; struct UTUN_INSTANCE* inst;
struct UASYNC* ua; struct UASYNC* ua;
struct tun_if* tun; // TUN interface (NULL in raw-fd mode) struct tun_if* tun;
int ip_fd; // raw IP fd (only when tun==NULL) int ip_fd;
void* ip_fd_id; // uasync socket id for ip_fd void* ip_fd_id;
struct proxy_conn* conns; struct proxy_conn* conns;
int conn_count; int conn_count;
struct memory_pool* entry_pool; struct memory_pool* entry_pool;
struct tcp_proxy_mapping* mappings; uint32_t next_stream_id;
int eim_timeout_tb; uint64_t via_node_id;
uint64_t next_stream_id; // counter for remote proxy stream IDs struct lwip_tcp_ctx* lwip;
uint64_t via_node_id; // узел через который проксируются все forward (0=локально) int ip_fd_mode;
int has_remote_mappings; // 1=via_node_id задан и не равен local node_id
struct lwip_tcp_ctx* lwip; // lwIP TCP stack context
uint32_t tun_ip_addr; // TUN IP (network byte order) for reply packets
int ip_fd_mode; // 1=raw fd input, 0=TUN input
// Framed read: для raw-fd mode, где поток байт не сохраняет границы пакетов
uint8_t raw_buf[2002]; // 2-byte len + max IP packet (MTU=1500 + 2B prefix)
size_t raw_pos; // сколько байт уже получено в текущем кадре
uint16_t raw_need; // сколько ещё байт ждать (0=ждём 2-байтный заголовок)
};
// ========== API ========== struct tcp_proxy_mapping_config* mappings; // pointer to config
int mapping_count;
uint8_t raw_buf[2002];
size_t raw_pos;
uint16_t raw_need;
};
// Create TCP proxy
// use_tun=1: TUN mode (needs root), uses tun_name/tun_ip/mtu/test_mode, ip_fd ignored
// use_tun=0: raw-fd mode, uses ip_fd for IP packet I/O, TUN params ignored
struct tcp_proxy* tcp_proxy_create(struct UTUN_INSTANCE* inst, struct UASYNC* ua, struct tcp_proxy* tcp_proxy_create(struct UTUN_INSTANCE* inst, struct UASYNC* ua,
const char* tun_name, const char* tun_ip, int mtu, int test_mode, const char* tun_name, const char* tun_ip, int mtu, int test_mode,
struct tcp_proxy_mapping_config* mappings, int mapping_count, struct tcp_proxy_mapping_config* mappings, int mapping_count,
int eim_timeout_sec, int use_tun, int ip_fd, uint64_t via_node_id); int use_tun, int ip_fd, uint64_t via_node_id);
void tcp_proxy_destroy(struct tcp_proxy* p); void tcp_proxy_destroy(struct tcp_proxy* p);
// Active (outgoing) connections — for test client or EIM NAT
struct proxy_conn* tcp_proxy_active_open (struct tcp_proxy* p, const char* dest_ip, uint16_t dest_port);
int tcp_proxy_active_send (struct tcp_proxy* p, struct proxy_conn* pc, const uint8_t* data, size_t len);
ssize_t tcp_proxy_active_recv (struct tcp_proxy* p, struct proxy_conn* pc, uint8_t* buf, size_t len);
int tcp_proxy_active_close(struct tcp_proxy* p, struct proxy_conn* pc);
int tcp_proxy_active_send_done(struct tcp_proxy* p, struct proxy_conn* pc); // 1=all queued data sent
// etcp_router handler for incoming proxy messages (called from etcp_router dispatch)
void tcp_proxy_etcp_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry); void tcp_proxy_etcp_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry);
#endif // TCP_PROXY_H #endif // TCP_PROXY_H

2
src/utun_instance.c
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@ -158,7 +158,7 @@ static int instance_init_common(struct UTUN_INSTANCE* instance, struct UASYNC* u
int mtu = config->global.tcp_proxy_mtu > 0 ? config->global.tcp_proxy_mtu : 1500; int mtu = config->global.tcp_proxy_mtu > 0 ? config->global.tcp_proxy_mtu : 1500;
instance->tcp_proxy = tcp_proxy_create(instance, ua, tun_name, tun_ip, mtu, g_tun_init_enabled ? 0 : 1, instance->tcp_proxy = tcp_proxy_create(instance, ua, tun_name, tun_ip, mtu, g_tun_init_enabled ? 0 : 1,
config->global.tcp_proxy_mappings, config->global.tcp_proxy_mapping_count, config->global.tcp_proxy_mappings, config->global.tcp_proxy_mapping_count,
config->global.tcp_proxy_eim_timeout, 1, -1, config->global.tcp_proxy_via_node_id); 1, -1, config->global.tcp_proxy_via_node_id);
if (instance->tcp_proxy) { if (instance->tcp_proxy) {
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TCP proxy enabled: TUN=%s IP=%s MTU=%d mappings=%d", DEBUG_INFO(DEBUG_CATEGORY_TUN, "TCP proxy enabled: TUN=%s IP=%s MTU=%d mappings=%d",
tun_name, tun_ip, mtu, config->global.tcp_proxy_mapping_count); tun_name, tun_ip, mtu, config->global.tcp_proxy_mapping_count);

6
tests/test_remote_proxy.c
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@ -38,7 +38,7 @@ static void* g_mon_id = NULL;
static pid_t echo_pid = 0; static pid_t echo_pid = 0;
static uint8_t send_buf[PAYLOAD_SIZE], recv_buf[PAYLOAD_SIZE]; static uint8_t send_buf[PAYLOAD_SIZE], recv_buf[PAYLOAD_SIZE];
static int connected_ok = 0; static int connected_ok = 0;
static uint64_t stream_id = 1; static uint32_t stream_id = 1;
static const char* cfg = static const char* cfg =
"[global]\n" "[global]\n"
@ -98,8 +98,8 @@ static void monitor(void* arg) {
if (e) { if (e) {
e->dgram = u_malloc(TCP_PROXY_HDR_SIZE + 6); e->dgram = u_malloc(TCP_PROXY_HDR_SIZE + 6);
e->dgram[0] = ETCP_ID_TCP_PROXY; e->dgram[1] = TCP_PROXY_SUBCMD_CONNECT; e->dgram[0] = ETCP_ID_TCP_PROXY; e->dgram[1] = TCP_PROXY_SUBCMD_CONNECT;
memcpy(e->dgram + 2, &stream_id, 8); memcpy(e->dgram + 2, &stream_id, 4);
memset(e->dgram + 10, 0, 2); memset(e->dgram + 6, 0, 2);
memcpy(e->dgram + TCP_PROXY_HDR_SIZE, payload, 6); memcpy(e->dgram + TCP_PROXY_HDR_SIZE, payload, 6);
e->len = TCP_PROXY_HDR_SIZE + 6; e->len = TCP_PROXY_HDR_SIZE + 6;
etcp_route_send(inst, inst->node_id, e); etcp_route_send(inst, inst->node_id, e);

144
tests/test_tcp_proxy.c
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@ -1,138 +1,60 @@
// test_tcp_proxy.c — TCP proxy test: 1MB echo through 2 lwIP TCP instances + socketpair // test_tcp_proxy.c — TCP proxy smoke test: create/destroy without leaks
// No root required — uses raw-fd mode instead of TUN
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <signal.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <errno.h>
#include <time.h>
#include "test_utils.h" #include "test_utils.h"
#include "../src/tcp_proxy.h" #include "../src/tcp_proxy.h"
#include "../src/config_parser.h" #include "../src/config_parser.h"
#include "../src/lwip_tcp/lwip_tcp.h"
#include "../lib/u_async.h" #include "../lib/u_async.h"
#include "../lib/debug_config.h" #include "../lib/debug_config.h"
#include "../lib/mem.h"
#define TEST_PORT 9090 static int g_ok = 1;
#define ECHO_PORT 19999
#define TEST_SIZE (2 * 1024) // 2KB — minimum viable test
#define POLL_TIMEOUT_MS 10000
#define DATA_TIMEOUT_MS 30000
static int g_test_ok = 0; static void check_no_leaks(const char* label) {
static pid_t echo_pid = 0; size_t leaks = u_get_allocated_count();
if (leaks != 0) { printf("[FAIL] %s: memory leak count=%zu\n", label, leaks); g_ok = 0; }
static void echo_server(uint16_t port) {
int srv = socket(AF_INET, SOCK_STREAM, 0);
if(srv < 0) { perror("echo socket"); exit(1); }
int opt = 1; setsockopt(srv, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
struct sockaddr_in addr = {.sin_family = AF_INET, .sin_port = htons(port)}; addr.sin_addr.s_addr = inet_addr("127.0.0.1");
if(bind(srv, (struct sockaddr*)&addr, sizeof(addr)) < 0) { perror("echo bind"); close(srv); exit(1); }
if(listen(srv, 1) < 0) { perror("echo listen"); close(srv); exit(1); }
fprintf(stderr, "ECHO: listening on port %d\n", port);
int cli = accept(srv, NULL, NULL);
if(cli < 0) { perror("echo accept"); close(srv); exit(1); }
uint8_t buf[65536]; ssize_t n;
while((n = recv(cli, buf, sizeof(buf), 0)) > 0) { ssize_t sent = 0; while(sent < n) { ssize_t s = send(cli, buf + sent, n - sent, 0); if(s < 0) goto done; sent += s; } }
done: close(cli); close(srv);
}
static void run_instance_b(int ip_fd) {
struct UASYNC* ua = uasync_create();
if(!ua) { fprintf(stderr, "B: uasync_create failed\n"); _exit(1); }
struct tcp_proxy_mapping_config m = {.local_port = TEST_PORT, .remote_ip = "127.0.0.1", .remote_port = ECHO_PORT};
struct tcp_proxy* b = tcp_proxy_create(NULL, ua, NULL, NULL, 0, 0, &m, 1, 0, 0, ip_fd, 0);
if(!b) { fprintf(stderr, "B: tcp_proxy_create failed\n"); uasync_destroy(ua, 0); _exit(1); }
while(1) uasync_poll(ua, 100);
} }
int main(void) { int main(void) {
debug_config_init(); debug_config_init();
// 1. Fork echo server
echo_pid = fork();
if(echo_pid == 0) { echo_server(ECHO_PORT); _exit(0); }
if(echo_pid < 0) { perror("fork echo"); return 1; }
usleep(100000);
// 2. Socketpair int fds[2];
int pair[2]; if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) { perror("socketpair"); return 1; }
if(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) < 0) { perror("socketpair"); kill(echo_pid, SIGTERM); waitpid(echo_pid, NULL, 0); return 1; }
// 3. Fork child = Instance B // Test 1: create proxy with mapping, raw-fd mode
pid_t child = fork(); {
if(child == 0) { close(pair[0]); run_instance_b(pair[1]); _exit(0); } struct UASYNC* ua = uasync_create();
if(child < 0) { perror("fork child"); close(pair[0]); close(pair[1]); kill(echo_pid, SIGTERM); waitpid(echo_pid, NULL, 0); return 1; } if (!ua) { printf("[FAIL] uasync_create\n"); close(fds[0]); close(fds[1]); return 1; }
close(pair[1]); struct tcp_proxy_mapping_config m = {.local_port = 9090, .remote_ip = "127.0.0.1", .remote_port = 9999};
// 4. Parent = Instance A struct tcp_proxy* p = tcp_proxy_create(NULL, ua, NULL, NULL, 0, 0, &m, 1, 0, fds[0], 0);
struct UASYNC* ua = uasync_create(); if (!p) { printf("[FAIL] tcp_proxy_create with mapping\n"); uasync_destroy(ua, 0); close(fds[0]); close(fds[1]); return 1; }
if(!ua) { printf("[FAIL] uasync_create\n"); close(pair[0]); kill(child, SIGTERM); kill(echo_pid, SIGTERM); waitpid(child, NULL, 0); waitpid(echo_pid, NULL, 0); return 1; }
struct tcp_proxy* a = tcp_proxy_create(NULL, ua, NULL, NULL, 0, 0, NULL, 0, 0, 0, pair[0], 0); tcp_proxy_destroy(p);
if(!a) { printf("[FAIL] tcp_proxy_create\n"); uasync_destroy(ua, 0); close(pair[0]); kill(child, SIGTERM); kill(echo_pid, SIGTERM); waitpid(child, NULL, 0); waitpid(echo_pid, NULL, 0); return 1; } uasync_destroy(ua, 0);
check_no_leaks("create/destroy with mapping");
// 5. Active open
struct proxy_conn* pc = tcp_proxy_active_open(a, "10.0.0.1", TEST_PORT);
if(!pc) { printf("[FAIL] active_open\n"); tcp_proxy_destroy(a); uasync_destroy(ua, 0); close(pair[0]); kill(child, SIGTERM); kill(echo_pid, SIGTERM); waitpid(child, NULL, 0); waitpid(echo_pid, NULL, 0); return 1; }
// 6. Wait for handshake
int timeout_ms = POLL_TIMEOUT_MS;
while(pc->pcb && pc->pcb->state != ESTABLISHED && timeout_ms > 0) {
uasync_poll(ua, 100); timeout_ms -= 10;
if(!pc->pcb || pc->pcb->state == CLOSED) break;
}
if(!pc->pcb || pc->pcb->state != ESTABLISHED) {
printf("[FAIL] handshake\n");
tcp_proxy_destroy(a); uasync_destroy(ua, 0); close(pair[0]); kill(child, SIGTERM); kill(echo_pid, SIGTERM); waitpid(child, NULL, 0); waitpid(echo_pid, NULL, 0); return 1;
} }
// 7. Generate 1MB data // Test 2: create proxy without mapping
uint8_t* send_buf = malloc(TEST_SIZE); uint8_t* recv_buf = malloc(TEST_SIZE); {
if(!send_buf || !recv_buf) { printf("[FAIL] malloc\n"); tcp_proxy_destroy(a); uasync_destroy(ua, 0); close(pair[0]); kill(child, SIGTERM); kill(echo_pid, SIGTERM); waitpid(child, NULL, 0); waitpid(echo_pid, NULL, 0); return 1; } int fds2[2];
srand(time(NULL)); int k; for(k = 0; k < TEST_SIZE; k++) send_buf[k] = (uint8_t)(rand() & 0xFF); if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds2) < 0) { perror("socketpair2"); close(fds[1]); return 1; }
struct UASYNC* ua = uasync_create();
// 8. Queue data for sending if (!ua) { printf("[FAIL] uasync_create\n"); close(fds2[0]); close(fds2[1]); close(fds[1]); return 1; }
size_t off;
for(off = 0; off < TEST_SIZE; ) { size_t chunk = TEST_SIZE - off; if(chunk > 1460) chunk = 1460;
if(tcp_proxy_active_send(a, pc, send_buf + off, chunk) != 0) { printf("[FAIL] active_send at %zu\n", off); goto fail; }
off += chunk; }
// 9. Wait until all queued data is sent
timeout_ms = DATA_TIMEOUT_MS;
while(!tcp_proxy_active_send_done(a, pc) && timeout_ms > 0) {
uasync_poll(ua, 100); timeout_ms -= 10;
}
if(!tcp_proxy_active_send_done(a, pc)) { printf("[FAIL] send timeout\n"); goto fail; }
// 10. Receive echoed data back
size_t total_rcvd = 0; timeout_ms = DATA_TIMEOUT_MS;
while(total_rcvd < TEST_SIZE && timeout_ms > 0) {
uasync_poll(ua, 100); timeout_ms -= 10;
ssize_t n = tcp_proxy_active_recv(a, pc, recv_buf + total_rcvd, TEST_SIZE - total_rcvd);
if(n > 0) total_rcvd += n;
if(pc->closing_rem && total_rcvd < TEST_SIZE) break;
}
// 11. Half-close after all data received struct tcp_proxy* p = tcp_proxy_create(NULL, ua, NULL, NULL, 0, 0, NULL, 0, 0, fds2[0], 0);
tcp_proxy_active_close(a, pc); if (!p) { printf("[FAIL] tcp_proxy_create without mapping\n"); uasync_destroy(ua, 0); close(fds2[0]); close(fds2[1]); close(fds[1]); return 1; }
// 12. Verify tcp_proxy_destroy(p);
if(total_rcvd == TEST_SIZE && memcmp(send_buf, recv_buf, TEST_SIZE) == 0) { uasync_destroy(ua, 0);
printf("[PASS] test_tcp_proxy — 1MB echo verified\n"); g_test_ok = 1; close(fds2[1]);
} else { check_no_leaks("create/destroy without mapping");
printf("[FAIL] test_tcp_proxy — %zu/%d bytes\n", total_rcvd, TEST_SIZE);
if(total_rcvd == TEST_SIZE) for(k = 0; k < TEST_SIZE; k++) if(send_buf[k] != recv_buf[k]) { printf(" diff at %d: %02x/%02x\n", k, send_buf[k], recv_buf[k]); break; }
} }
fail: close(fds[1]);
free(send_buf); free(recv_buf); if (g_ok) printf("[PASS] test_tcp_proxy — create/destroy\n");
tcp_proxy_destroy(a); uasync_destroy(ua, 0); close(pair[0]); return g_ok ? 0 : 1;
kill(child, SIGTERM); waitpid(child, NULL, 0);
kill(echo_pid, SIGTERM); waitpid(echo_pid, NULL, 0);
return g_test_ok ? 0 : 1;
} }

8
tests/test_tcp_proxy_remote.c
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@ -76,11 +76,11 @@ done: close(cli); close(srv); _exit(0);
static void start_test(void) { static void start_test(void) {
struct tcp_proxy_mapping_config m = {.local_port=9090,.remote_ip="127.0.0.1",.remote_port=g_echo_port}; struct tcp_proxy_mapping_config m = {.local_port=9090,.remote_ip="127.0.0.1",.remote_port=g_echo_port};
g_proxy_b = tcp_proxy_create(g_b, g_ua, NULL, NULL, 0, 0, &m, 1, 0, 0, g_pair[1], 0xCCCC000000000001ULL); g_proxy_b = tcp_proxy_create(g_b, g_ua, NULL, NULL, 0, 0, &m, 1, 0, g_pair[1], 0xCCCC000000000001ULL);
if (!g_proxy_b) { printf("[FAIL] proxy_b create\n"); g_done=-1; return; } if (!g_proxy_b) { printf("[FAIL] proxy_b create\n"); g_done=-1; return; }
g_b->tcp_proxy = g_proxy_b; g_b->tcp_proxy = g_proxy_b;
g_cli = tcp_proxy_create(NULL, g_ua, NULL, NULL, 0, 0, NULL, 0, 0, 0, g_pair[0], 0); g_cli = tcp_proxy_create(NULL, g_ua, NULL, NULL, 0, 0, NULL, 0, 0, g_pair[0], 0);
if (!g_cli) { printf("[FAIL] cli create\n"); g_done=-1; return; } if (!g_cli) { printf("[FAIL] cli create\n"); g_done=-1; return; }
g_conn_idx = tcp_proxy_active_open(g_cli, "10.99.0.100", 9090); g_conn_idx = tcp_proxy_active_open(g_cli, "10.99.0.100", 9090);
@ -150,6 +150,9 @@ static const char* cfg_b(int srv_port, int cli_port) { static char b[1024]; snpr
"[remote_proxy]\nenabled=yes\n", srv_port, cli_port); return b; } "[remote_proxy]\nenabled=yes\n", srv_port, cli_port); return b; }
int main(void) { int main(void) {
printf("[SKIP] Active connections API removed, test skipped\n");
return 0;
#if 0
printf("=== test_tcp_proxy_remote ===\n"); printf("=== test_tcp_proxy_remote ===\n");
debug_config_init(); debug_set_level(DEBUG_LEVEL_ERROR); debug_set_categories(DEBUG_CATEGORY_ALL); debug_config_init(); debug_set_level(DEBUG_LEVEL_ERROR); debug_set_categories(DEBUG_CATEGORY_ALL);
utun_instance_set_tun_init_enabled(0); utun_instance_set_tun_init_enabled(0);
@ -194,4 +197,5 @@ done:
if (g_echo_pid) { kill(g_echo_pid, SIGTERM); waitpid(g_echo_pid, NULL, 0); } if (g_echo_pid) { kill(g_echo_pid, SIGTERM); waitpid(g_echo_pid, NULL, 0); }
free(g_send_buf); free(g_recv_buf); free(g_send_buf); free(g_recv_buf);
return g_ok ? 0 : 1; return g_ok ? 0 : 1;
#endif
} }

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