From 20937d56e64841004e0631e458f947a363318804 Mon Sep 17 00:00:00 2001
From: sfja <sfja2004@gmail.com>
Date: Thu, 9 Apr 2026 15:29:02 +0200
Subject: [PATCH] use specified port

---
 backend/src/main.cpp   |  8 +++-----
 backend/src/server.cpp | 11 ++++++-----
 backend/src/server.hpp |  4 +++-
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/backend/src/main.cpp b/backend/src/main.cpp
index d272f77..6e15f73 100644
--- a/backend/src/main.cpp
+++ b/backend/src/main.cpp
@@ -9,10 +9,8 @@
 #include <sys/types.h>
 #include <thread>
 
-#ifdef BACKEND_TCP_PORT
-#define PORT BACKEND_TCP_PORT
-#else
-#define PORT 8888
+#ifndef BACKEND_TCP_PORT
+#define BACKEND_TCP_PORT 8888
 #endif
 
 #ifndef BACKEND_MQTT_PORT
@@ -29,7 +27,7 @@ int main(void)
     auto mqtt_client = mst::mqtt::Client(
         BACKEND_MQTT_HOST, BACKEND_MQTT_PORT, "test", "1234");
 
-    auto server = mst::server::Server();
+    auto server = mst::server::Server(BACKEND_TCP_PORT);
 
     mqtt_client.subscribe("/skateboard/update", [&](std::string_view text) {
         std::println("Skateboard sent: {}", text);
diff --git a/backend/src/server.cpp b/backend/src/server.cpp
index a80080f..ecc017a 100644
--- a/backend/src/server.cpp
+++ b/backend/src/server.cpp
@@ -29,7 +29,7 @@ struct Measurement {
     double angle;
 };
 
-auto get_listener_socket() -> int
+auto get_listener_socket(const std::string& port) -> int
 {
     int listener; // Listening socket descriptor
     int status;
@@ -41,7 +41,7 @@ auto get_listener_socket() -> int
 
     struct addrinfo* addr;
 
-    if ((status = ::getaddrinfo(NULL, "8889", &hints, &addr)) != 0)
+    if ((status = ::getaddrinfo(NULL, port.c_str(), &hints, &addr)) != 0)
         throw Error(std::format("getaddrinfo ({})", ::gai_strerror(status)));
 
     struct addrinfo* p;
@@ -86,15 +86,16 @@ struct Server::State {
     std::vector<int> subscriber_fds;
 };
 
-Server::Server()
-    : m_state(std::make_unique<State>())
+Server::Server(uint16_t port)
+    : m_port(port)
+    , m_state(std::make_unique<State>())
 {
 }
 Server::~Server() = default;
 
 void Server::listen()
 {
-    m_listener_fd = get_listener_socket();
+    m_listener_fd = get_listener_socket(std::to_string(m_port));
     m_state->pollfds.push_back(::pollfd {
         .fd = m_listener_fd,
         .events = POLLIN,
diff --git a/backend/src/server.hpp b/backend/src/server.hpp
index e21e635..06ed6cd 100644
--- a/backend/src/server.hpp
+++ b/backend/src/server.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <memory>
 #include <stdexcept>
 
@@ -11,7 +12,7 @@ struct Error : public std::runtime_error {
 
 class Server {
 public:
-    explicit Server();
+    explicit Server(uint16_t port);
     ~Server();
 
     void listen();
@@ -23,6 +24,7 @@ private:
     void create_connection();
     void handle_request(size_t i);
 
+    uint16_t m_port;
     int m_listener_fd { };
     std::unique_ptr<State> m_state { nullptr };
 };