windows下C调用socket实现TCP和UDP通信
2013-09-26 23:25
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TCP SERVER实现
TCP client 实现
UDP server实现
UDP client 实现
#include< stdio.h > #include< stdlib.h > #include< windows.h > #include< winsock.h > #include< string.h > #pragma comment( lib, "ws2_32.lib" ) #define PORT 2046 #define BACKLOG 10 #define TRUE 1 void main( void ) { int iServerSock; int iClientSock; char *buf = "hello, world!\n"; struct sockaddr_in ServerAddr; struct sockaddr_in ClientAddr; int sin_size; WSADATA WSAData; if( WSAStartup( MAKEWORD( 1, 1 ), &WSAData ) )//初始化 { printf( "initializationing error!\n" ); WSACleanup( ); exit( 0 ); } if( ( iServerSock = socket( AF_INET, SOCK_STREAM, 0 ) ) == INVALID_SOCKET ) { printf( "创建套接字失败!\n" ); WSACleanup( ); exit( 0 ); } ServerAddr.sin_family = AF_INET; ServerAddr.sin_port = htons( PORT );//监视的端口号 ServerAddr.sin_addr.s_addr = INADDR_ANY;//本地IP memset( & ( ServerAddr.sin_zero ), 0, sizeof( ServerAddr.sin_zero ) ); if( bind( iServerSock, ( struct sockaddr * )&ServerAddr, sizeof( struct sockaddr ) ) == -1 ) { printf( "bind调用失败!\n" ); WSACleanup( ); exit( 0 ); } if( listen( iServerSock, BACKLOG ) == -1 ) { printf( "listen调用失败!\n" ); WSACleanup( ); exit( 0 ); } while( TRUE ) { sin_size = sizeof( struct sockaddr_in ); iClientSock = accept( iServerSock, ( struct sockaddr * )&ClientAddr, &sin_size ); if( iClientSock == -1 ) { printf( "accept调用失败!\n" ); WSACleanup( ); exit( 0 ); } printf( "服务器连接到%s\n", inet_ntoa( ClientAddr.sin_addr ) ); if( send( iClientSock, buf, strlen( buf ), 0 ) == -1 ) { printf( "send调用失败!" ); closesocket( iClientSock ); WSACleanup( ); exit( 0 ); } } }
TCP client 实现
#include< stdio.h > #include< stdlib.h > #include< windows.h > #include< winsock.h > #include< string.h > #pragma comment( lib, "ws2_32.lib" ) #define PORT 2046 #define BACKLOG 10 #define TRUE 1 #define MAXDATASIZE 100 void main( void ) { int iClientSock; char buf[ MAXDATASIZE ]; struct sockaddr_in ServerAddr; int numbytes; // struct hostent *he; WSADATA WSAData; // int sin_size; /* if( ( he = gethostbyname( "liuys" ) ) == NULL ) { printf( "gethostbyname调用失败!" ); WSACleanup( ); exit( 0 ); } */ if( WSAStartup( MAKEWORD( 1, 1 ), &WSAData ) )//初始化 { printf( "initializationing error!\n" ); WSACleanup( ); exit( 0 ); } if( ( iClientSock = socket( AF_INET, SOCK_STREAM, 0 ) ) == INVALID_SOCKET ) { printf( "创建套接字失败!\n" ); WSACleanup( ); exit( 0 ); } ServerAddr.sin_family = AF_INET; ServerAddr.sin_port = htons( PORT ); // ServerAddr.sin_addr = *( ( struct in_addr * )he->h_addr ); ServerAddr.sin_addr.s_addr = inet_addr( "192.168.1.100" );//记得换IP memset( &( ServerAddr.sin_zero ), 0, sizeof( ServerAddr.sin_zero ) ); if( connect( iClientSock, ( struct sockaddr * ) & ServerAddr, sizeof( struct sockaddr ) ) == -1 ) { printf( "connect失败!" ); WSACleanup( ); exit( 0 ); } numbytes = recv( iClientSock, buf, MAXDATASIZE, 0 ); if( numbytes == -1 ) { printf( "recv失败!" ); WSACleanup( ); exit( 0 ); } buf[ numbytes ] = '\0'; printf( "Received: %s", buf ); closesocket( iClientSock ); WSACleanup( ); }
UDP server实现
//服务器 #include< stdio.h > #include< string.h > #include< winsock.h > #include< windows.h > #pragma comment( lib, "ws2_32.lib" ) #define PORT 2046 #define BACKLOG 10 #define TRUE 1 #define MAXDATASIZE 1000 void main( void ) { int iServerSock; // int iClientSock; int addr_len; int numbytes; char buf[ MAXDATASIZE ]; struct sockaddr_in ServerAddr; struct sockaddr_in ClientAddr; WSADATA WSAData; if( WSAStartup( MAKEWORD( 1, 1 ), &WSAData ) ) { printf( "initializationing error!\n" ); WSACleanup( ); exit( 0 ); } iServerSock = socket( AF_INET, SOCK_DGRAM, 0 ); if( iServerSock == INVALID_SOCKET ) { printf( "创建套接字失败!\n" ); WSACleanup( ); exit( 0 ); } ServerAddr.sin_family = AF_INET; ServerAddr.sin_port = htons( PORT );//监视的端口号 ServerAddr.sin_addr.s_addr = INADDR_ANY;//本地IP memset( & ( ServerAddr.sin_zero ), 0, sizeof( ServerAddr.sin_zero ) ); if( bind( iServerSock, ( struct sockaddr * )&ServerAddr, sizeof( struct sockaddr ) ) == -1 ) { printf( "bind调用失败!\n" ); WSACleanup( ); exit( 0 ); } addr_len = sizeof( struct sockaddr ); numbytes = recvfrom( iServerSock, buf, MAXDATASIZE, 0, ( struct sockaddr * ) & ClientAddr, &addr_len ); if( numbytes == -1 ) { printf( "recvfrom调用失败!\n" ); WSACleanup( ); exit( 0 ); } printf( "got packet from %s\n", inet_ntoa( ClientAddr.sin_addr ) ); printf( "packet is %d bytes long\n", numbytes ); buf[ numbytes ] = '\0'; printf( "packet contains \"%s\"\n", buf ); closesocket( iServerSock ); WSACleanup( ); }
UDP client 实现
//客户端 #include< stdio.h > #include< stdlib.h > #include< windows.h > #include< winsock.h > #include< string.h > #pragma comment( lib, "ws2_32.lib" ) #define PORT 2046 #define MAXDATASIZE 100 void main( void ) { int iClientSock; struct sockaddr_in ServerAddr; int numbytes; char buf[ MAXDATASIZE ] = "hello world!"; WSADATA WSAData; if( WSAStartup( MAKEWORD( 1, 1 ), &WSAData ) ) { printf( "initializationing error!\n" ); WSACleanup( ); exit( 0 ); } if( ( iClientSock = socket( AF_INET, SOCK_DGRAM, 0 ) ) == -1 ) { printf( "创建套接字失败!\n" ); WSACleanup( ); exit( 0 ); } ServerAddr.sin_family = AF_INET; ServerAddr.sin_port = htons( PORT ); ServerAddr.sin_addr.s_addr = inet_addr( "192.168.1.100" );//记得换IP memset( &( ServerAddr.sin_zero ), 0, sizeof( ServerAddr.sin_zero ) ); numbytes = sendto( iClientSock, buf, strlen( buf ), 0, ( struct sockaddr * ) & ServerAddr, sizeof( struct sockaddr ) ); if( numbytes == -1 ) { printf( "sendto调用失败!\n" ); WSACleanup( ); exit( 0 ); } printf( "sent %d bytes to %s\n", numbytes, inet_ntoa( ServerAddr.sin_addr ) ); closesocket( iClientSock ); WSACleanup( ); }
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