fix windows

tools/server/server-models.cpp

@@ -9,6 +9,16 @@
 #include <thread>
 #include <mutex>
 #include <condition_variable>
+#include <cstring>
+
+#ifdef _WIN32
+#include <winsock2.h>
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#endif
 
 #if defined(__APPLE__) && defined(__MACH__)
 // macOS: use _NSGetExecutablePath to get the executable path
@@ -112,10 +122,63 @@ std::optional<server_model_meta> server_models::get_meta(const std::string & nam
     return std::nullopt;
 }
 
-static int get_free_port(std::string host) {
-    httplib::Server s;
-    int port = s.bind_to_any_port(host.c_str());
-    s.stop();
+static int get_free_port() {
+#ifdef _WIN32
+    WSADATA wsaData;
+    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
+        return -1;
+    }
+    typedef SOCKET native_socket_t;
+#define INVALID_SOCKET_VAL INVALID_SOCKET
+#define CLOSE_SOCKET(s) closesocket(s)
+#else
+    typedef int native_socket_t;
+#define INVALID_SOCKET_VAL -1
+#define CLOSE_SOCKET(s) close(s)
+#endif
+
+    native_socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
+    if (sock == INVALID_SOCKET_VAL) {
+#ifdef _WIN32
+        WSACleanup();
+#endif
+        return -1;
+    }
+
+    struct sockaddr_in serv_addr;
+    std::memset(&serv_addr, 0, sizeof(serv_addr));
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_addr.sin_port = htons(0);
+
+    if (bind(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) != 0) {
+        CLOSE_SOCKET(sock);
+#ifdef _WIN32
+        WSACleanup();
+#endif
+        return -1;
+    }
+
+#ifdef _WIN32
+    int namelen = sizeof(serv_addr);
+#else
+    socklen_t namelen = sizeof(serv_addr);
+#endif
+    if (getsockname(sock, (struct sockaddr*)&serv_addr, &namelen) != 0) {
+        CLOSE_SOCKET(sock);
+#ifdef _WIN32
+        WSACleanup();
+#endif
+        return -1;
+    }
+
+    int port = ntohs(serv_addr.sin_port);
+
+    CLOSE_SOCKET(sock);
+#ifdef _WIN32
+    WSACleanup();
+#endif
+
     return port;
 }
 
@@ -154,7 +217,7 @@ void server_models::load(const std::string & name) {
 
     instance_t inst;
     inst.meta        = meta.value();
-    inst.meta.port   = get_free_port(base_params.hostname);
+    inst.meta.port   = get_free_port();
     inst.meta.status = SERVER_MODEL_STATUS_LOADING;
 
     subprocess_s child_proc;
@@ -218,7 +281,7 @@ void server_models::load(const std::string & name) {
         SRV_INF("instance name=%s exited with status %d\n", name.c_str(), exit_code);
     });
     if (inst.th.joinable()) {
-        inst.th.detach();
+        inst.th.detach(); // TODO: remove this because it makes joining impossible
     }
 
     // start a logging thread to read stdout/stderr
@@ -324,7 +387,7 @@ server_http_res_ptr server_models::proxy_request(const server_http_req & req, co
     return proxy;
 }
 
-void server_models::notify_router_server_ready(const std::string & name) {
+void server_models::notify_router_server_ready(const std::string & host, const std::string & name) {
     // send a notification to the router server that a model instance is ready
     const char * router_port = std::getenv("LLAMA_SERVER_ROUTER_PORT");
     if (router_port == nullptr) {
@@ -332,7 +395,7 @@ void server_models::notify_router_server_ready(const std::string & name) {
         return;
     }
 
-    httplib::Client cli("localhost", std::atoi(router_port));
+    httplib::Client cli(host, std::atoi(router_port));
     cli.set_connection_timeout(0, 200000); // 200 milliseconds
 
     httplib::Request req;
@@ -345,9 +408,13 @@ void server_models::notify_router_server_ready(const std::string & name) {
     body["value"] = server_model_status_to_string(SERVER_MODEL_STATUS_LOADED);
     req.body = body.dump();
 
-    SRV_INF("notifying router server that model %s is ready\n", name.c_str());
-    cli.send(std::move(req));
-    // discard response
+    SRV_INF("notifying router server (port=%s) that model %s is ready\n", router_port, name.c_str());
+    auto result = cli.send(std::move(req));
+    if (result.error() != httplib::Error::Success) {
+        auto err_str = httplib::to_string(result.error());
+        SRV_ERR("failed to notify router server: %s\n", err_str.c_str());
+        // TODO: maybe force shutdown here?
+    }
 }
 
 

tools/server/server-models.h

@@ -98,7 +98,7 @@ public:
     server_http_res_ptr proxy_request(const server_http_req & req, const std::string & method, const std::string & name);
 
     // notify the router server that a model instance is ready
-    static void notify_router_server_ready(const std::string & name);
+    static void notify_router_server_ready(const std::string & host, const std::string & name);
 };
 
 /**

tools/server/server.cpp

@@ -5825,7 +5825,7 @@ int main(int argc, char ** argv, char ** envp) {
         LOG_INF("%s: starting the main loop...\n", __func__);
 
         // optionally, notify router server that this instance is ready
-        server_models::notify_router_server_ready(params.model_alias);
+        server_models::notify_router_server_ready(params.hostname, params.model_alias);
 
         // this call blocks the main thread until queue_tasks.terminate() is called
         ctx_server.queue_tasks.start_loop();

tools/server/tests/unit/test_router.py

@@ -16,7 +16,7 @@ def create_server():
         ("non-existent/model", False),
     ]
 )
-def test_chat_completion_stream(model: str, success: bool):
+def test_router_chat_completion_stream(model: str, success: bool):
     # TODO: make sure the model is in cache (ie. ServerProcess.load_all()) before starting the router server
     global server
     server.start()

tools/server/tests/utils.py

@@ -528,7 +528,7 @@ class ServerPreset:
         server.n_predict = 4
         server.seed = 42
         return server
-    
+
     @staticmethod
     def router() -> ServerProcess:
         server = ServerProcess()