winsock select 學習代碼(1)

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// SelectCli.cpp : 定義控制台應用程式的進入點。//#include "stdafx.h"#include <winsock2.h>#include <conio.h>#pragma comment(lib,"ws2_32")#define SOCKET_MAXCNT64#define THREAD_NUM2//實驗代碼  與伺服器配合 不可改變連接線程數#define CONNECT_PORT8773#define CONNECT_ADDR"127.0.0.1"DWORD WINAPI SocketFunc(LPVOID pM)  {  SOCKETsock;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};WSADATAwsa_data;// 初始化數組 傳遞給線程  區別各個線程號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;}

// SelectSrv.cpp : 定義控制台應用程式的進入點。//#include "stdafx.h"#include <winsock2.h>#include <conio.h>#pragma comment(lib,"ws2_32")#define SOCKET_MAXCNT64#define CONNECT_PORT8773#define CONNECT_ADDR"127.0.0.1"int _tmain(int argc, _TCHAR* argv[]){WSADATA wsa_data;fd_set read_all;SOCKETsrv_listen = INVALID_SOCKET;struct sockaddr_in srv_addr;int result,ready_cnt;int addr_len = sizeof(srv_addr);SOCKETrecv_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;}

學習了下 winsock  下的select寫法

對於調用封裝好的各類庫  熟悉下原始寫法還是很有裨益的