TCP通讯（服务端）

修改自网络：

#include <stdio.h>#include <string.h>#include <winsock2.h>#pragma comment(lib, "ws2_32.lib")int Server(void);int main(int argc, char *argv[]){    return Server();}int Server(void){    WSADATA wsaData;    SOCKET iSockRawID, iSockNewID;    struct sockaddr_in stCliAddr, stServAddr;    int clilen;    int ret;    char buff[1024];    if (WSAStartup(MAKEWORD(2,2), &wsaData) != NO_ERROR)    {        printf("Error at WSAStartup().\n");        return 255;    }    if ((iSockRawID = socket(AF_INET, SOCK_STREAM, 0)) < 0)    {        printf("Server: Can not open a stream socket!\n");        return 1;    }    stServAddr.sin_family = AF_INET;    stServAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);    stServAddr.sin_port = htons(8001);    if ((bind(iSockRawID, (struct sockaddr *)&stServAddr, sizeof(struct sockaddr))) < 0)    {        printf("Server: Con not bind address!\n");        return 2;    }    listen(iSockRawID, SOMAXCONN);    while (1)    {        clilen = sizeof (struct sockaddr_in);        iSockNewID = accept(iSockRawID, (struct sockaddr *)&stCliAddr, &clilen);        if (iSockNewID < 0)        {            printf("Server: Accept error!\n");            return 3;        }        else        {            memset(buff, 0, sizeof(buff));            ret = recv(iSockNewID, buff, sizeof (buff)-1, 0);            printf("Client[%s:%i]: %s\n", inet_ntoa(stCliAddr.sin_addr), ntohs(stCliAddr.sin_port), buff);            ret = send(iSockNewID, buff, strlen(buff), 0);            closesocket(iSockNewID);        }    }    closesocket(iSockRawID);    return 0;}