todo: iocp recv안되는 문제 해결하기

Server/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.5)
+
+set(PROJECT_NAME "Server")
+
+project(${PROJECT_NAME})
+
+add_executable(${PROJECT_NAME}
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/echoserver.cpp"
+)
+
+if(WIN32)
+    target_link_libraries(${PROJECT_NAME} PRIVATE ws2_32)
+endif()

Server/src/echoserver.cpp

@@ -0,0 +1,93 @@
+#pragma once
+
+#ifdef _WIN32
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <ws2bth.h>
+#include <ws2def.h>
+#include <windows.h>
+#define in_addr_t ULONG
+#elif __linux__
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/epoll.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <sys/eventfd.h>
+#define SOCKET int
+#define INVALID_SOCKET -1
+#define SOCKET_ERROR -1
+#else
+#error "이 플랫폼은 지원되지 않습니다."
+#endif
+
+#include <chrono>
+
+void err_quit(const char *msg) {
+  char *msgbuf = strerror(errno);
+  fprintf(stderr, "[%s] %s\n", msg, msgbuf);
+  exit(1);
+}
+
+void err_display(const char *msg) {
+  char *msgbuf = strerror(errno);
+  fprintf(stderr, "[%s] %s\n", msg, msgbuf);
+}
+
+#define LISTENIP "::"
+#define LISTENPORT 9010
+#define BUFSIZE 100
+
+int main(int argc, char *argv[]) {
+  WSADATA wsa;
+  if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0) {
+    err_quit("WSAStartup()");
+    return EXIT_FAILURE;
+  }
+  SOCKET listenSocket = socket(AF_INET6, SOCK_STREAM, 0);
+  if (listenSocket == INVALID_SOCKET) err_quit("socket()");
+
+  struct sockaddr_in6 serverAddr;
+  memset(&serverAddr, 0, sizeof(serverAddr));
+  serverAddr.sin6_family = AF_INET6;
+  inet_pton(AF_INET6, LISTENIP, &serverAddr.sin6_addr);
+  serverAddr.sin6_port = htons(LISTENPORT);
+
+  if (SOCKET_ERROR ==
+      bind(listenSocket, (struct sockaddr *)&serverAddr, sizeof(serverAddr)))
+    err_quit("bind()");
+  if (SOCKET_ERROR == listen(listenSocket, SOMAXCONN)) err_quit("listen()");
+
+  SOCKET client_sock;
+  struct sockaddr_in6 client_addr;
+  socklen_t addr_len;
+
+  addr_len = sizeof(client_addr);
+  printf("Waiting for connection...\n");
+  client_sock =
+      accept(listenSocket, (struct sockaddr *)&client_addr, &addr_len);
+  if (client_sock == INVALID_SOCKET) err_quit("accept()");
+  printf("Connection established!\n");
+
+  char buf[BUFSIZE + 1];
+
+  while (2) {
+    int retVal = recv(client_sock, buf, BUFSIZE, 0);
+    if (retVal == SOCKET_ERROR)
+      err_display("recv()");
+    else if (retVal == 0)
+      break;
+
+    char ipv6str[INET6_ADDRSTRLEN];
+    inet_ntop(AF_INET6, &client_addr, ipv6str, sizeof(ipv6str));
+    buf[retVal] = '\0';
+    printf("[TCP/%s:%d] %s\n", ipv6str, ntohs(client_addr.sin6_port), buf);
+
+    if (SOCKET_ERROR == send(client_sock, buf, BUFSIZE, 0))
+      err_display("send()");
+  }
+
+  WSACleanup();
+}