防火牆對於127.0.0.1地址的不進行攔截
阿新 • • 發佈：2019-02-18
使用迴環地址進行本地TCP/IP通訊，防火牆不會進行攔截。
#include <winsock2.h> #include <stdio.h> #pragma comment(lib,"wsock32.lib") void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) return; if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN sockaddr; sockaddr.sin_addr.S_un.S_addr = htonl(INADDR_LOOPBACK); sockaddr.sin_family = AF_INET; sockaddr.sin_port = htons(8006); bind(sockSrv, (SOCKADDR*)&sockaddr, sizeof(SOCKADDR)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while(1) { SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char SendBuf[100]; send(sockConn, SendBuf, sprintf(SendBuf,"server") + 1, 0); char recvBuf[100]; recv(sockConn, recvBuf, 100, 0); printf("%s\n", recvBuf); closesocket(sockConn); } } #include <winsock2.h> #include <stdio.h> #pragma comment(lib,"wsock32.lib") void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) return; if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return; } SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN sockaddr; sockaddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//INADDR_LOOPBACK; sockaddr.sin_family = AF_INET; sockaddr.sin_port = htons(8006); connect(sockClient, (SOCKADDR*)&sockaddr, sizeof(SOCKADDR)); char recvBuf[100] = {0}, sendBuf[100] = {0}; recv(sockClient, recvBuf, 100, 0); printf("%s\n", recvBuf); send(sockClient, sendBuf, sprintf(sendBuf, "client") + 1, 0); closesocket(sockClient); WSACleanup(); }