#include <stdio.h> #include <winsock2.h> #pragma comment(lib,"ws2_32.lib") int main(void) { //初始化wsa WORD sockVision = MAKEWORD(2, 2); WSADATA wsadata; //其他变量 SOCKET serSocket; struct sockaddr_in remoteAddr; struct sockaddr_in sin; int ret = -1; int nAddrlen = sizeof(remoteAddr); char revdata[255]; char senddata[255]; if (WSAStartup(sockVision, &wsadata) != 0) { printf("WSA初始化失败\n"); return 0; } //创建套接字 serSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (serSocket == INVALID_SOCKET) { printf("socket服务器创建失败\n"); return 0; } //绑定IP和端口 sin.sin_family = AF_INET; sin.sin_port = htons(8888); sin.sin_addr.S_un.S_addr = INADDR_ANY; if (bind(serSocket, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR) { printf("绑定IP和端口\n"); return 0; } //循环接收数据 while (1) { ret = recvfrom(serSocket, revdata, 255, 0, (SOCKADDR*)&remoteAddr, &nAddrlen); if (ret > 0) { revdata[ret] = 0x00; printf("接收到一个连接:%s \n", inet_ntoa(remoteAddr.sin_addr)); printf("\n"); printf("客户:"); printf(revdata); printf("\n"); } if (strcmp(revdata, "bye") == 0) break; //发送数据 printf("我:"); // scanf("%s", senddata); sendto(serSocket, senddata, strlen(senddata), 0, (SOCKADDR*)&remoteAddr, nAddrlen); } closesocket(serSocket); WSACleanup(); return 0; }
#include <stdio.h> #include <winsock2.h> #pragma comment(lib,"ws2_32.lib") int main(void) { WORD sockVision = MAKEWORD(2, 2); WSADATA wsadata; SOCKET sclient; struct sockaddr_in clientAddr; char senddata[255]; char revdata[255]; int ret = -1; int len = -1; if (WSAStartup(sockVision, &wsadata) != 0) { printf("WSA初始化失败\n"); return 0; } sclient = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (sclient == INVALID_SOCKET) { printf("socket客户端创建失败\n"); return 0; } clientAddr.sin_family = AF_INET; clientAddr.sin_port = htons(8888); clientAddr.sin_addr.S_un.S_addr = INADDR_ANY;// inet_addr("192.168.1.105"); len = sizeof(clientAddr); while (1) { printf("我:"); scanf("%s", senddata); sendto(sclient, senddata, strlen(senddata), 0, (SOCKADDR*)&clientAddr, len); if (strcmp(senddata, "bye") == 0) break; //ret = recvfrom(sclient, revdata, 255, 0, (SOCKADDR*)&clientAddr, &len); if (ret > 0) { revdata[ret] = 0x00; printf("\n"); printf("服务器:"); printf(revdata); printf("\n"); } } closesocket(sclient); WSACleanup(); system("pause"); return 0; }
标签:UDP,return,revdata,win,senddata,ret,printf,sin,客户端 From: https://www.cnblogs.com/xwtstudio/p/16920669.html