linux基础编程 套接字socket 完整的服务器端多线程socket程序【转】

转自：http://blog.****.net/ghostyu/article/details/7737203

此段程序来自我的一个项目中，稍微做了些修改，运行稳定，客户端程序比较简单所以未编写，可以用socket调试工具测试此段代码

费话不多说，直接上代码

[cpp] view plain copy

    #include<stdlib.h>
    #include<stdio.h>
    #include<string.h>
    #include<errno.h>
    #include<netdb.h>
    #include<sys/types.h>
    #include<netinet/in.h>
    #include<sys/socket.h>
    #include<sys/wait.h>
    #include<unistd.h>
    #include<pthread.h>
    #include<fcntl.h>  

    #define __DEBUG
    #ifdef __DEBUG
    #define DBG(fmt,args...) fprintf(stdout,  fmt,  ##args)
    #else
    #define DBG(fmt,args...)
    #endif
    #define ERR(fmt,args...) fprintf(stderr,  fmt,  ##args)  

    /*
    isStreamQuit == 0 :Start
    isStreamQuit == 1 :Client Quit
    isStreamQuit ==-1 :App Quit
    */
    static int isStreamQuit    = ;
    static int gStreamServerFd = -;
    int gStreamClientFd;  

    #define PORT_SOCKET          9000   //server监听端口
    #define RECV_BUF_MAX_LEN     512
    #define TIME_WAIT            200000     /*200ms*/  

    /*
    socket发送函数
     */
    int ScketSend(unsigned char *buf,unsigned int len)
    {  

        int ret = ;
        if(gStreamClientFd <= )
            return -;
        ret = send(gStreamClientFd,buf,len,);
        if(ret <=  ){
            return -;
        }else if(ret == len){
            return ;
        }
        while(ret < len){
            ret += send(gStreamClientFd,buf+ret,len-ret,);
        }
        return ;
    }  

    /*
    socket连接线程，阻塞等待客户端的连接，
    连接后循环处理客户端发来的数据，
    这里只能连接一个客户端，稍加修改，就可以支持多客户端连接
    */
    void *SocketThread(void *arg)
    {
        fd_set SockRead;
        struct timeval TimeOut;
        int ret;
        struct sockaddr clientAddr;
        unsigned char *rcvBuf = (unsigned char *)malloc(RECV_BUF_MAX_LEN);  

        socklen_t  len;
        len = sizeof(clientAddr);
        while(){  

            int rcvLen;
            /*阻塞等待客户端连接*/
            gStreamClientFd = accept(gStreamServerFd, &clientAddr, &len);
            if(gStreamClientFd == -){
                ERR("ERROR in stream accept: %s\n",strerror(errno));
                /*add errno handler here,in some case,the error is not fatal*/
                /*code here*/
                break;
            }
            /*isStreamQuit == -1,is the siganl to quit*/
            if(isStreamQuit != -){
                isStreamQuit = ;
            }
            DBG("accep a stream client\n");
            /*客户端已连接，循环处理*/
            while(isStreamQuit==){
                FD_ZERO(&SockRead);
                FD_SET(gStreamClientFd,&SockRead);
                TimeOut.tv_sec = ;
                TimeOut.tv_usec = TIME_WAIT;
                /*
                200ms超时判断是否有数据接收，有则接收，没有继续循环，
                总是让程序不能一直阻塞在这里
                */
                ret = select(gStreamClientFd+,&SockRead,NULL,NULL,&TimeOut);
                if(ret == -){
                    ERR("ERROR in select\n");
                    break;
                }else if(ret == ){
                    continue;
                }
                /*接收客户端发来的数据*/
                rcvLen = recv(gStreamClientFd,rcvBuf,RECV_BUF_MAX_LEN,);
                if(rcvLen < ){
                    ERR("ERROR in stream accept: %s\n",strerror(errno));
                    /*add errno handler here,in some case,the error is not fatal*/
                    /*code here*/
                    isStreamQuit = ;
                    break;
                }else if(rcvLen == ){
                    DBG("stream client close\n");
                    /*code here*/
                    isStreamQuit = ;
                    break;
                }
                DBG("rcvLen: %d,rcvBuf: %s\n",rcvLen,rcvBuf);  

                memset(rcvBuf,,RECV_BUF_MAX_LEN);
            }
            DBG("Close Stream Socket\n");
            close(gStreamClientFd);  

            /*OTHER Error or App Quit*/
            if(isStreamQuit == -){
                break;
            }  

        }
        DBG("SocketThread exit\n");
        free(rcvBuf);
        close(gStreamServerFd);
        pthread_exit(NULL);
    }  

    /*
    socket连接初始化
    */
    int SocketInit()
    {
        struct sockaddr_in server;
        pthread_t tStreamSocketThr;
        /*创建socket*/
        gStreamServerFd = socket(AF_INET,SOCK_STREAM,);
        if(gStreamServerFd == - ){
            ERR("ERROR in create Stream Socket!\n");
            return -;
        }
        memset(&server,,sizeof(server));
        server.sin_family = AF_INET;
        server.sin_port = htons(PORT_SOCKET);
        server.sin_addr.s_addr = htonl(INADDR_ANY);
        /*绑定监听端口*/
        if(bind(gStreamServerFd ,(struct sockaddr*)&server,sizeof(server))== -){
            ERR("ERROR in bind Stream Socket: %s\n",strerror(errno));
            return -;
        }
        /*开始监听*/
        if( listen(gStreamServerFd, ) == -){
            ERR("ERROR in listen Stream Socket: %s\n",strerror(errno));
            return -;
        }
        /*创建socket连接线程，用来处理监听的结果，比如有客户端连接等*/
        pthread_create(&tStreamSocketThr,NULL,SocketThread,NULL);
        /*release thread resource,so we not use pthread_join to waitting*/
        pthread_detach(tStreamSocketThr);
        return ;
    }  

    #if 1
    int main()
    {
        if(SocketInit() == -){
            return -;
        }
        while(){
            sleep();
        }  

        /*notice to exit*/
        isStreamQuit = -;
        sleep();
        if(gStreamServerFd){
            close(gStreamServerFd);
        }
        DBG("SUCCESS in ConnectManageExit\n");
    }
    #endif   

运行结果

[cpp] view plain copy

    [root@localhost src]# ./socket_connect
    accep a stream client
    rcvLen: ,rcvBuf: helle
    Close Stream Socket
    accep a stream client
    rcvLen: ,rcvBuf: hello
    Close Stream Socket
    accep a stream client
    rcvLen: ,rcvBuf: hello
    rcvLen: ,rcvBuf: hello
    rcvLen: ,rcvBuf: helle
    Close Stream Socket