winsock select 学习代码(1)

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<br>// SelectCli.cpp : 定义控制台应用程序的入口点。 //   #include "stdafx.h" #include <winsock2.h> #include <conio.h>   #pragma comment(lib,"ws2_32")   #define SOCKET_MAXCNT   64 #define THREAD_NUM      2       //  实验代码  与服务器配合 不可改变连接线程数 #define CONNECT_PORT    8773    #define CONNECT_ADDR    "127.0.0.1"     DWORD WINAPI SocketFunc(LPVOID pM)  {      SOCKET  sock;     char buf[100] = {0};     int result;     struct sockaddr_in cli_addr;     int num = *(int*)pM;       sock = socket(AF_INET,SOCK_STREAM,0);       cli_addr.sin_family = AF_INET;     cli_addr.sin_port = htons(CONNECT_PORT);     cli_addr.sin_addr.s_addr = inet_addr(CONNECT_ADDR);         result = connect(sock,(struct sockaddr*)&cli_addr,sizeof(cli_addr));     if(result == SOCKET_ERROR)     {         printf("%d thread: connect error\n",num);         exit(1);     }       while(1)     {               sprintf(buf,"%d thread: %s",num,"hello world!\n");         printf(buf);         result = send(sock,buf,100,0);         if(result == SOCKET_ERROR)         {             printf("2 ,%s\n","send error");         }         Sleep(3000);               }       exit(1);     return 0; }        int _tmain(int argc, _TCHAR* argv[]) {     int num[SOCKET_MAXCNT] = {0};     WSADATA wsa_data;       // 初始化数组 传递给线程  区别各个线程号     for(int i = 0 ;i < SOCKET_MAXCNT;i++)     {         num[i] = i;     }       WSAStartup(WINSOCK_VERSION,&wsa_data);           for(int i = 0; i < THREAD_NUM;i++)     {         HANDLE hThread1 = CreateThread(NULL,0,SocketFunc,&num[i],0,NULL);     }         while(1)     {         Sleep(100000);     }     return 0; }

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// SelectSrv.cpp : 定义控制台应用程序的入口点。 //   #include "stdafx.h" #include <winsock2.h> #include <conio.h>   #pragma comment(lib,"ws2_32")   #define SOCKET_MAXCNT   64   #define CONNECT_PORT    8773    #define CONNECT_ADDR    "127.0.0.1"     int _tmain(int argc, _TCHAR* argv[]) {     WSADATA wsa_data;     fd_set read_all;     SOCKET  srv_listen = INVALID_SOCKET;     struct sockaddr_in srv_addr;     int result,ready_cnt;     int addr_len = sizeof(srv_addr);     SOCKET  recv_sock[2] = {INVALID_SOCKET,INVALID_SOCKET};       WSAStartup(MAKEWORD(2,2),&wsa_data);       srv_listen = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);       srv_addr.sin_family = AF_INET;     srv_addr.sin_port = htons(CONNECT_PORT);     srv_addr.sin_addr.s_addr = INADDR_ANY;       result = bind(srv_listen,(struct sockaddr*)&srv_addr,addr_len);     if(result == SOCKET_ERROR)     {         perror("err ");         printf("line %d \n",__LINE__);         return -1;     }       listen(srv_listen,SOMAXCONN);       FD_ZERO(&read_all);     FD_SET(srv_listen,&read_all);     fd_set read_set;     while(1)     {         read_set = read_all;         ready_cnt = select(0,&read_set,NULL,NULL,NULL);         if(ready_cnt == SOCKET_ERROR)         {             perror("err ");             printf("line %d \n",__LINE__);             return -1;         }           if(FD_ISSET(srv_listen,&read_set))         {             struct sockaddr_in faddr;             int addr_len = sizeof(faddr);             static int sock_num = 0;             if(sock_num > 1)             {                 perror("connect socket is too much\n ");                 printf("line %d \n",__LINE__);                 return -1;             }             recv_sock[sock_num] = accept(srv_listen,(struct sockaddr*)&faddr,&addr_len);             if(recv_sock[sock_num] == INVALID_SOCKET)             {                 perror("err ");                 printf("line %d \n",__LINE__);                 return -1;             }             FD_SET(recv_sock[sock_num],&read_all);             sock_num++;             continue;         }           for(int i = 0 ; i < 2;i++)         {             char buf[100] = {0};             if(!FD_ISSET(recv_sock[i],&read_set))             {                 continue;             }             result = recv(recv_sock[i],buf,100,NULL);             if(result != SOCKET_ERROR)             {                 printf("recv thread .%s\n",buf);             }         }     }       getch();     return 0; }

学习了下 winsock  下的select写法

对于调用封装好的各类库  熟悉下原始写法还是很有裨益的