Aggiungi override probe TCP keepalive

native/tcp_keepalive/binding.gyp

@@ -0,0 +1,8 @@
+{
+  "targets": [
+    {
+      "target_name": "tcp_keepalive_native",
+      "sources": [ "tcp_keepalive_native.c" ]
+    }
+  ]
+}

native/tcp_keepalive/tcp_keepalive_native.c

@@ -0,0 +1,49 @@
+#include <node_api.h>
+#include <stdbool.h>
+
+#ifdef __linux__
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#endif
+
+static napi_value make_boolean(napi_env env, bool value) {
+    napi_value result;
+    napi_get_boolean(env, value, &result);
+    return result;
+}
+
+static napi_value set_keepalive_probes(napi_env env, napi_callback_info info) {
+    size_t argc = 2;
+    napi_value args[2];
+    int32_t fd = -1;
+    int32_t probes = 0;
+
+    napi_get_cb_info(env, info, &argc, args, NULL, NULL);
+    if (argc < 2) {
+        return make_boolean(env, false);
+    }
+
+    if (napi_get_value_int32(env, args[0], &fd) != napi_ok ||
+        napi_get_value_int32(env, args[1], &probes) != napi_ok ||
+        fd < 0 || probes <= 0) {
+        return make_boolean(env, false);
+    }
+
+#ifdef __linux__
+    return make_boolean(env, setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &probes, sizeof(probes)) == 0);
+#else
+    return make_boolean(env, false);
+#endif
+}
+
+static napi_value init(napi_env env, napi_value exports) {
+    napi_value fn;
+
+    napi_create_function(env, "setKeepAliveProbes", NAPI_AUTO_LENGTH, set_keepalive_probes, NULL, &fn);
+    napi_set_named_property(env, exports, "setKeepAliveProbes", fn);
+
+    return exports;
+}
+
+NAPI_MODULE(NODE_GYP_MODULE_NAME, init)