서버
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 | /* ## 소켓 서버 : 1 v 1 - Single Process 1. socket() : 소켓생성 2. bind() : 소켓설정 3. listen() : 수신대기열생성 4. accept() : 연결대기 5. read()&write() WIN recv()&send : 데이터 읽고쓰기 6. close() WIN closesocket : 소켓종료 */ #include "stdafx.h" #include <winsock2.h> #pragma comment(lib, "Ws2_32.lib") #define MAX_BUFFER 1024 #define SERVER_PORT 3500 int _tmain( int argc, _TCHAR* argv[]) { // Winsock Start - windock.dll 로드 WSADATA WSAData; if (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0) { printf ( "Error - Can not load 'winsock.dll' file\n" ); return 1; } // 1. 소켓생성 SOCKET listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (listenSocket == INVALID_SOCKET) { printf ( "Error - Invalid socket\n" ); return 1; } // 서버정보 객체설정 SOCKADDR_IN serverAddr; memset (&serverAddr, 0, sizeof (SOCKADDR_IN)); serverAddr.sin_family = PF_INET; serverAddr.sin_port = htons(SERVER_PORT); serverAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); // 2. 소켓설정 if (bind(listenSocket, ( struct sockaddr*)&serverAddr, sizeof (SOCKADDR_IN)) == SOCKET_ERROR) { printf ( "Error - Fail to bind\n" ); // 6. 소켓종료 closesocket(listenSocket); // Winsock End WSACleanup(); return 1; } // 3. 수신대기열생성 if (listen(listenSocket, 5) == SOCKET_ERROR) { printf ( "Error - Fail to listen\n" ); // 6. 소켓종료 closesocket(listenSocket); // Winsock End WSACleanup(); return 1; } // 4. 연결대기 SOCKADDR_IN clientAddr; int addrLen = sizeof (SOCKADDR_IN); memset (&clientAddr, 0, addrLen); SOCKET clientSocket = accept(listenSocket, ( struct sockaddr *)&clientAddr, &addrLen); // 5. 데이터 전달 while (1){ if (clientSocket != INVALID_SOCKET) { // 5-1. 데이터 읽기 char messageBuffer[MAX_BUFFER]; int receiveBytes = recv(clientSocket, messageBuffer, MAX_BUFFER, 0); if (receiveBytes > 0) { printf ( "TRACE - Receive message : %s (%d bytes)\n" , messageBuffer, receiveBytes); // 5-2. 데이터 쓰기 int sendBytes = send(clientSocket, messageBuffer, strlen (messageBuffer), 0); if (sendBytes > 0) { printf ( "TRACE - Send message : %s (%d bytes)\n" , messageBuffer, sendBytes); } } } } // 6-1. 클라이언트 소켓종료 closesocket(clientSocket); // 6-2. 리슨 소켓종료 closesocket(listenSocket); // Winsock End WSACleanup(); return 0; } |
클라이언트
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 | /* ## 소켓 클라이언트 : 1 v 1 1. socket() : 소켓생성 2. connect() : 연결요청 3. read()&write() WIN recv()&send : 데이터 읽고쓰기 4. close() WIN closesocket : 소켓종료 */ #include "stdafx.h" #include <winsock2.h> #pragma comment(lib, "Ws2_32.lib") #define MAX_BUFFER 1024 #define SERVER_IP "127.0.0.1" #define SERVER_PORT 3500 int _tmain( int argc, _TCHAR* argv[]) { // Winsock Start - winsock.dll 로드 WSADATA WSAData; if (WSAStartup(MAKEWORD(2, 0), &WSAData) != 0) { printf ( "Error - Can not load 'winsock.dll' file\n" ); return 1; } // 1. 소켓생성 SOCKET listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (listenSocket == INVALID_SOCKET) { printf ( "Error - Invalid socket\n" ); return 1; } // 서버정보 객체설정 SOCKADDR_IN serverAddr; memset (&serverAddr, 0, sizeof (SOCKADDR_IN)); serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(SERVER_PORT); serverAddr.sin_addr.S_un.S_addr = inet_addr(SERVER_IP); // 2. 연결요청 if (connect(listenSocket, ( struct sockaddr *)&serverAddr, sizeof (serverAddr)) == SOCKET_ERROR) { printf ( "Error - Fail to connect\n" ); // 4. 소켓종료 closesocket(listenSocket); // Winsock End WSACleanup(); return 1; } else { printf ( "Server Connected\n* Enter Message\n->" ); } while (1) { // 메시지 입력 char messageBuffer[MAX_BUFFER]; int i, bufferLen; for (i = 0; 1; i++) { messageBuffer[i] = getchar (); if (messageBuffer[i] == '\n' ) { messageBuffer[i++] = '\0' ; break ; } } bufferLen = i; // 3-1. 데이터 쓰기 int sendBytes = send(listenSocket, messageBuffer, bufferLen, 0); if (sendBytes > 0) { printf ( "TRACE - Send message : %s (%d bytes)\n" , messageBuffer, sendBytes); // 3-2. 데이터 읽기 int receiveBytes = recv(listenSocket, messageBuffer, MAX_BUFFER, 0); if (receiveBytes > 0) { printf ( "TRACE - Receive message : %s (%d bytes)\n* Enter Message\n->" , messageBuffer, receiveBytes); } } } // 4. 소켓종료 closesocket(listenSocket); // Winsock End WSACleanup(); return 0; } |