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Evgeny committed 2026-03-25 18:47:51 +03:00
1 parent 4903ac9e64
commit 14a9fffa87
2 files changed
+20 -10
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tools/proxy/udp_proxy.c
+18 -8
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@@ -27,6 +27,8 @@ typedef struct {
socket_t listen_sock;
void* listen_id;
struct sockaddr_in target_addr;
char listen_ip[64];
int listen_port;
int loss_forward;
int loss_back;
int delay_min_fwd;
@@ -146,9 +148,9 @@ static void backend_read_cb(socket_t sock, void* arg) {
static void print_usage(const char* prog) {
printf("UDP Proxy - network loss/delay emulator\n\n");
printf("Usage: %s --listen PORT --target IP:PORT [options]\n\n", prog);
printf("Usage: %s --listen [IP:]PORT --target IP:PORT [options]\n\n", prog);
printf("Required:\n");
printf(" --listen PORT Listen UDP port\n");
printf(" --listen [IP:]PORT Listen IP:port (default 0.0.0.0)\n");
printf(" --target IP:PORT Destination IP:port\n\n");
printf("Options:\n");
printf(" --loss-forward N Forward loss %% (0-100, default 0)\n");
@@ -156,7 +158,7 @@ static void print_usage(const char* prog) {
printf(" --delay-forward A:B Forward delay ms range (default 0:0)\n");
printf(" --delay-back A:B Backward delay ms range (default 0:0)\n");
printf(" --help Show this help\n\n");
printf("Example: %s --listen 12345 --target 8.8.8.8:53 --loss-forward 5 --delay-forward 10:50\n", prog);
printf("Example: %s --listen 0.0.0.0:12345 --target 8.8.8.8:53 --loss-forward 5 --delay-forward 10:50\n", prog);
exit(0);
}
@@ -180,16 +182,24 @@ int main(int argc, char* argv[]) {
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "--help") == 0) print_usage(argv[0]);
if (strcmp(argv[i], "--listen") == 0 && i+1 < argc) {
int p = atoi(argv[++i]);
char ip[64] = "0.0.0.0"; int p = 0;
const char* val = argv[++i];
if (strchr(val, ':')) {
sscanf(val, "%63[^:]:%d", ip, &p);
} else {
p = atoi(val);
}
struct sockaddr_in addr = {0};
addr.sin_family = AF_INET;
addr.sin_port = htons(p);
addr.sin_addr.s_addr = INADDR_ANY;
inet_aton(ip, &addr.sin_addr);
strncpy(ctx.listen_ip, ip, sizeof(ctx.listen_ip)-1);
ctx.listen_port = p;
ctx.listen_sock = socket_create_udp(AF_INET);
socket_set_nonblocking(ctx.listen_sock);
socket_set_reuseaddr(ctx.listen_sock, 1);
if (bind((int)ctx.listen_sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "bind failed");
DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "bind listen failed on %s:%d", ip, p);
return 1;
}
ctx.listen_id = uasync_add_socket_t(ctx.ua, ctx.listen_sock, client_read_cb, NULL, NULL, &ctx);
@@ -218,8 +228,8 @@ int main(int argc, char* argv[]) {
print_usage(argv[0]);
}
printf("UDP Proxy: listen :%d → %s:%d | loss %d%%/%d%% | delay %d-%d/%d-%d ms\n",
ntohs(((struct sockaddr_in){0}).sin_port), // fix later
printf("UDP Proxy: listen %s:%d → %s:%d | loss %d%%/%d%% | delay %d-%d/%d-%d ms\n",
ctx.listen_ip, ctx.listen_port,
inet_ntoa(ctx.target_addr.sin_addr), ntohs(ctx.target_addr.sin_port),
ctx.loss_forward, ctx.loss_back,
ctx.delay_min_fwd, ctx.delay_max_fwd, ctx.delay_min_back, ctx.delay_max_back);