Socket的应用

落日映苍穹つ 2022-08-06 05:18 151阅读 0赞

一个字符聊天系统:

\#include <WinSock2.h> \#include <stdio.h> int main() \{ WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 1, 1); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) \{ /\* Tell the user that we could not find a usable \*/ /\* WinSock DLL. \*/ return 1; \} /\* Confirm that the WinSock DLL supports 2.2.\*/ /\* Note that if the DLL supports versions greater \*/ /\* than 2.2 in addition to 2.2, it will still return \*/ /\* 2.2 in wVersion since that is the version we \*/ /\* requested. \*/ if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 ) \{ /\* Tell the user that we could not find a usable \*/ /\* WinSock DLL. \*/ WSACleanup(); return 1; \} SOCKET sockSrv = socket(AF\_INET, SOCK\_DGRAM, 0); SOCKADDR\_IN addrSrv; addrSrv.sin\_addr.S\_un.S\_addr = htonl(INADDR\_ANY); addrSrv.sin\_family = AF\_INET; addrSrv.sin\_port = htons(6000); bind(sockSrv, (SOCKADDR\*) &addrSrv, sizeof(SOCKADDR)); char sendBuf\[100\]; char recvBuf\[100\]; char tempBuf\[200\]; SOCKADDR\_IN addrClient; int len = sizeof(SOCKADDR); while (1) \{ recvfrom(sockSrv, recvBuf, 100, 0, (SOCKADDR\*)&addrClient, &len); if (recvBuf\[0\] == 'q') \{ sendto(sockSrv, "q", strlen("q")+1, 0, (SOCKADDR\*)&addrClient, len); printf("Chat end!"); break; \} sprintf(tempBuf, "%s say : %s", inet\_ntoa(addrClient.sin\_addr), recvBuf); printf("%s/n", tempBuf); printf("Input Data please:/n"); gets(sendBuf); sendto(sockSrv, sendBuf, strlen(sendBuf)+1, 0, (SOCKADDR\*)&addrClient, len); \} closesocket(sockSrv); WSACleanup(); return 0; \}

\#include <WinSock2.h> \#include <stdio.h> int main() \{ WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 1, 1); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) \{ /\* Tell the user that we could not find a usable \*/ /\* WinSock DLL. \*/ return 1; \} /\* Confirm that the WinSock DLL supports 2.2.\*/ /\* Note that if the DLL supports versions greater \*/ /\* than 2.2 in addition to 2.2, it will still return \*/ /\* 2.2 in wVersion since that is the version we \*/ /\* requested. \*/ if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 ) \{ /\* Tell the user that we could not find a usable \*/ /\* WinSock DLL. \*/ WSACleanup(); return 1; \} SOCKET sockClient = socket(AF\_INET, SOCK\_DGRAM, 0); SOCKADDR\_IN addrSrv; addrSrv.sin\_addr.S\_un.S\_addr = inet\_addr("127.0.0.1"); addrSrv.sin\_family = AF\_INET; addrSrv.sin\_port = htons(6000); char recvBuf\[100\]; char sendBuf\[100\]; char tempBuf\[200\]; int len = sizeof(SOCKADDR); while (1) \{ printf("Input data please:/n"); gets(sendBuf); sendto(sockClient, sendBuf, strlen(sendBuf)+1, 0, (SOCKADDR\*)&addrSrv, len); recvfrom(sockClient, recvBuf, 100, 0, (SOCKADDR\*)&addrSrv, &len); if (recvBuf\[0\] == 'q') \{ sendto(sockClient, "q", strlen("q")+1, 0, (SOCKADDR\*)&addrSrv, len); printf("Chat End!/n"); break; \} recvBuf\[strlen(recvBuf)\] = '/0'; sprintf(tempBuf, "%s say : %s", inet\_ntoa(addrSrv.sin\_addr), recvBuf); printf("%s/n", tempBuf); \} closesocket(sockClient); WSACleanup(); return 0; \}