sotestclient_udp.cpp

windows S/C socket example.

#include <stdio.h>
#include <Winsock2.h>

void main()
{
SOCKET socket1;
//InitWinsock();
 WSADATA wsaData;
    int iErrorCode;
    if (WSAStartup(MAKEWORD(2,1),&wsaData)) //调用Windows Sockets DLL
    {
         printf("Winsock无法初始化!\n");
         WSACleanup();
         return;
    }

printf("服务器开始创建SOCKET。\n");
struct sockaddr_in server;
int len =sizeof(server);
server.sin_family=AF_INET;
server.sin_port=htons(2701); ///server的监听端口
//server.sin_addr.s_addr=inet_addr("221.223.16.32"); ///server的地址
server.sin_addr.s_addr=inet_addr("192.168.1.100");
socket1=socket(AF_INET,SOCK_DGRAM,0);
while (1)
{
    char buffer[1024]="\0";
    printf("input message\n");
    scanf("%s",buffer);
//    printf("%s",buffer);
    if (strcmp(buffer,"bye")==0)
    {
        printf("退出!\n");
        Sleep(100);
        closesocket(socket1);
        break;
    }

    if (sendto(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&server,len)!=SOCKET_ERROR)
    {
        //printf("sending..\n");
        Sleep(100);
        if (recvfrom(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&server,&len) != SOCKET_ERROR)
        printf("rece from server:%s\n",buffer);
    }
    }
    closesocket(socket1);
}