initial commit

service.cpp

@@ -0,0 +1,79 @@
+
+extern "C" {
+#include <arpa/inet.h>
+}
+
+#include <expected>
+#include <string>
+#include <vector>
+#include <span>
+#include <iostream>
+#include <thread>
+#include <chrono>
+#include <cstring>
+
+#include <service.hpp>
+
+using namespace std::chrono_literals;
+
+void Handler::Handle(int sock) {
+        std::cout << std::format("Handler {} start", sock) << std::endl;
+        std::chrono::milliseconds timesleep(1s);
+        std::this_thread::sleep_for(timesleep);
+        std::cout << std::format("Handler {} done", sock) << std::endl;
+        close(sock);
+}
+
+Service::Service(int svcport) {
+        port = svcport;
+}
+Service::~Service() {
+        close(port);
+}
+
+std::expected<void, std::string> Service::Bind(void){
+        struct sockaddr_in address;
+        int srvsock;
+        if ((srvsock = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
+                int errnocopy = errno;
+                std::string error = std::strerror(errnocopy);
+                return std::unexpected("Create socker error: " + error);
+        }
+        int opt = 1;
+        if (setsockopt(srvsock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt))) {
+                int errnocopy = errno;
+                std::string error = std::strerror(errnocopy);
+                return std::unexpected("Set socket option error: " + error);
+        }
+        address.sin_family = AF_INET;
+        address.sin_addr.s_addr = INADDR_ANY;
+        address.sin_port = htons(port);
+        if (bind(srvsock, (struct sockaddr *)&address, sizeof(address)) < 0) {
+                int errnocopy = errno;
+                std::string error = std::strerror(errnocopy);
+                return std::unexpected("Bind error: " + error);
+        }
+        if (listen(srvsock, 3) < 0) {
+                int errnocopy = errno;
+                std::string error = std::strerror(errnocopy);
+                return std::unexpected("Listen error: " + error);
+        }
+        sock = srvsock;
+        return {};
+}
+
+std::expected<void, std::string> Service::Listen(Handler *handler){
+        struct sockaddr_in address;
+        int addrlen = sizeof(address);
+        int newsock = 0;
+        for (;;) {
+                if ((newsock = accept(sock, (struct sockaddr *)&address, (socklen_t *)&addrlen)) < 0) {
+                        int errnocopy = errno;
+                        std::string error = std::strerror(errnocopy);
+                        return std::unexpected("Accept error: " + error);
+                }
+                std::jthread t(&Handler::Handle, handler, newsock);
+                t.detach();
+        }
+        return {};
+}