Linux C利用Socket套接字进行服务器与多个客户端进行通讯

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/ReturningProdigal/article/details/51916754

服务器端

#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <string.h>
#include <signal.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>
//服务器端

void *fun_thrReceiveHandler(void *socketInfo);
void *fun_thrAcceptHandler(void *socketListen);
//1:是 0：否
int checkThrIsKill(pthread_t thr);

typedef struct MySocketInfo{
    int socketCon;
    char *ipaddr;
    uint16_t port;
}_MySocketInfo;

// 客户端数组
struct MySocketInfo arrConSocket[10];
int conClientCount = 0;

// 接受客户端线程列表
pthread_t arrThrReceiveClient[10];
int thrReceiveClientCount = 0;

int main()
{
    //初始化全局变量
    //memset(arrConSocket,0,sizeof(struct MySocketInfo)*10);

    printf("开始socket\n");
    /* 创建TCP连接的Socket套接字 */
    int socketListen = socket(AF_INET, SOCK_STREAM, 0);
    if(socketListen < 0){
        printf("创建TCP套接字失败\n");
        exit(-1);
    }else{
        printf("创建套接字成功\n");
    }
    /* 填充服务器端口地址信息，以便下面使用此地址和端口监听 */
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(struct sockaddr_in));
    server_addr.sin_family=AF_INET;
    server_addr.sin_addr.s_addr=htonl(INADDR_ANY); /* 这里地址使用全0，即所有 */
    server_addr.sin_port=htons(2000);
    if(bind(socketListen, (struct sockaddr *)&server_addr,sizeof(struct sockaddr)) != 0){
        perror("绑定ip地址、端口号失败\n");
        exit(-1);
    }else{
        printf("绑定ip地址,端口号\n");
    }
    /* 开始监听相应的端口 */
    if(listen(socketListen, 10) != 0){
        printf("开启监听失败\n");
        exit(-1);
    }else{
        printf("开启监听成功\n");
    }
    /* 接受连接套接字 */
    pthread_t thrAccept;
    pthread_create(&thrAccept,NULL,fun_thrAcceptHandler,&socketListen);

    /* 实时发送数据 */
    while(1){
        //判断线程存活多少
        int i;
        for(i=0;i<thrReceiveClientCount;i++){
            if(checkThrIsKill(arrThrReceiveClient[i]) == 1){
                printf("有个线程被杀了\n");
                thrReceiveClientCount--;
            }
        }
        printf("当前有接受数据线程多少个：%d\n",thrReceiveClientCount);

        // 可以录入用户操作选项，并进行相应操作
        char userStr[30] = {'0'};
        scanf("%s",userStr);
        if(strcmp(userStr,"q") == 0){
            printf("用户选择退出！\n");
            break;
        }
        // 发送消息
        if(conClientCount <= 0){
            printf("没有客户端连接\n");
        }else{
            int i;
            for(i=0; i<conClientCount; i++){
                //int sendMsg_len = send(arrConSocket[i].socketCon, userStr, 30, 0);
                int sendMsg_len = write(arrConSocket[i].socketCon,userStr,30);
                if(sendMsg_len > 0){
                    printf("向%s:%d发送成功\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }else{
                    printf("向%s:%d发送失败\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }
            }
        }

        sleep(0.5);
    }

    // 等待子进程退出
    printf("等待子线程退出，即将退出！\n");
    char *message;
    pthread_join(thrAccept,(void *)&message);
    printf("%s\n",message);

    return 0;
}

void *fun_thrReceiveHandler(void *socketCon){
    char buffer[30];
    int buffer_length;
    int _socketCon;
    while(1){
        //添加对buffer清零
        bzero(&buffer,sizeof(buffer));
        _socketCon = *((int *)socketCon);
        sleep(0.1);
        printf("接受数据线程中，连接套接字为%d\n",_socketCon);
        
        buffer_length = read(_socketCon,buffer,30);
        if(buffer_length == 0){
            printf("%d 客户端关闭\n",_socketCon);
            conClientCount--;
            break;
        }else if(buffer_length < 0){
            printf("接受客户端数据失败\n");
            break;
        }
        buffer[buffer_length] = '\0';
        printf("%d 说：%s\n",_socketCon,buffer);


        //获取当前线程id
        //printf("当前线程id:%ld",pthread_self());


        sleep(0.2);
    }
    printf("接受数据线程结束了\n");
    return NULL;
}

void *fun_thrAcceptHandler(void *socketListen){
    while(1){
        int sockaddr_in_size = sizeof(struct sockaddr_in);
        struct sockaddr_in client_addr;
        int _socketListen = *((int *)socketListen);
        int socketCon = accept(_socketListen, (struct sockaddr *)(&client_addr), (socklen_t *)(&sockaddr_in_size));
        if(socketCon < 0){
            printf("连接失败\n");
        }else{
            printf("连接成功 ip: %s:%d\r\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
        }
        printf("连接套接字为：%d\n",socketCon);
        //开启新的通讯线程，负责同连接上来的客户端进行通讯
        _MySocketInfo socketInfo;
        socketInfo.socketCon = socketCon;
        socketInfo.ipaddr = inet_ntoa(client_addr.sin_addr);
        socketInfo.port = client_addr.sin_port;
        arrConSocket[conClientCount] = socketInfo;
        conClientCount++;
        printf("连接了%d个用户\n",conClientCount);

        pthread_t thrReceive = 0;
        pthread_create(&thrReceive,NULL,fun_thrReceiveHandler,&socketCon);
        arrThrReceiveClient[thrReceiveClientCount] = thrReceive;
        thrReceiveClientCount++;

        //让进程休息1秒
        sleep(0.5);
    }

    char *s = "安全退出接受进程";
    pthread_exit(s);
}

int checkThrIsKill(pthread_t thr){
    int res = 1;
    int res_kill = pthread_kill(thr,0);
    if(res_kill == 0){
        res = 0;
    }
    return res;
}

客户端

#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <string.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>

typedef struct MySocketInfo{
    int socketCon;
    unsigned long ipaddr;
    unsigned short port;
}_MySocketInfo;

void *fun_thrReceiveHandler(void *socketCon);

int main()
{
    printf("开始socket\n");
    /* 创建TCP连接的Socket套接字 */
    int socketCon = socket(AF_INET, SOCK_STREAM, 0);
    if(socketCon < 0){
        printf("创建TCP连接套接字失败\n");
        exit(-1);
    }
    /* 填充客户端端口地址信息，以便下面使用此地址和端口监听 */
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(struct sockaddr_in));
    server_addr.sin_family=AF_INET;
    server_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
    server_addr.sin_port=htons(2000);
    printf("连接之前的socketCon:%d",socketCon);
    /* 连接服务器 */
    int res_con = connect(socketCon,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr));
    if(res_con != 0){
        printf("连接失败\n");
        exit(-1);
    }
    printf("连接成功\n");
    //开启新的实时接受数据线程
    pthread_t thrReceive;
    pthread_create(&thrReceive,NULL,fun_thrReceiveHandler,&socketCon);

    /* 实时发送数据 */
    while(1){
        //char userStr[30] = {'\0'};
        char *userStr = "woaini";
        // 可以录入用户操作选项，并进行相应操作
        //scanf("%s",userStr);
        //if(strcmp(userStr,"q") == 0){
            //printf("用户选择退出！\n");
            //break;
        //}
        // 发送消息
        //int sendMsg_len = send(socketCon, userStr, 30, 0);
        printf("-发送之前-\n");
        int sendMsg_len = write(socketCon,userStr,30);
        if(sendMsg_len > 0){
            printf("发送成功,客户端套接字:%d\n",socketCon);
        }else{
            printf("发送失败\n");
        }

        sleep(2);
    }

    // 关闭套接字
    close(socketCon);
    return 0;
}

void *fun_thrReceiveHandler(void *socketCon){
    while(1){
        char buffer[30];
        int _socketCon = *((int *)socketCon);
        //int buffer_length = recv(_socketCon,buffer,30,0);
        int buffer_length = read(_socketCon,buffer,30);
        buffer[buffer_length] = '\0';
        printf("服务器说:%s\n",buffer);
    }
    return NULL;
}

代码思路：服务器端：首先创建监听的套接字，然后创建用于（循环检测客户端连接）的新线程，当检测到有客户端连接，则创建一个新的线程负责同这个套接字通讯，即接受这个套接字发送过来的消息。

现象：单个客户端同服务器可以进行通讯，当连接上多个客户端过后，服务器端能够群发消息，最后连接的客户端向服务器发送的消息能够接受到，但之前的所有的客户端向服务器发送消息均不能收到。

解决思路：先使用排除法，首先找到了一份正确的客户端代码，连接上我自己写的服务器，也出现了同样的错误，所以可以排除我自己写的客户端。最终到了服务器端。服务器中，因为单个客户端可以与服务器通讯，所以检测连接的线程没有问题，那么最终归结到了循环接受客户端数据的线程。那着正确的服务器接受客户端数据的代码同自己写的对照，哈哈，发现了问题，是_socketCon值的问题，_socketCon的赋值是通过指针，然后打印这个值，发现这个值在不断变化，并且在检测连接的线程中定义的 int socketCon 值正是这个，而这个值是在 while死循环中不停的创建，不停的销毁！哇咔咔，真相终于大白与天下，功夫不负有心人啊，查了一天半的bug终于被我查出来了！

总结：

1、在死循环中切记不要定义变量，最好是在死循环之外定义变量，在死循环中使用！

2、在函数有死循环时，值只有一个的局部变量，就在死循环之上定义并初始化！就不要在死循环中赋值，只是去使用它就好了！

3、在创建多线程给多线程处理函数传参数中，切记不要传入生命周期较短的指针变量，传入值类型都好！

服务器与多个客户端通讯的正确代码如下：

服务器端

#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <string.h>
#include <signal.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>
//服务器端

void *fun_thrReceiveHandler(void *socketInfo);
void *fun_thrAcceptHandler(void *socketListen);
//1:是 0：否
int checkThrIsKill(pthread_t thr);

typedef struct MySocketInfo{
    int socketCon;
    char *ipaddr;
    uint16_t port;
}_MySocketInfo;

// 客户端数组
struct MySocketInfo arrConSocket[10];
int conClientCount = 0;

// 接受客户端线程列表
pthread_t arrThrReceiveClient[10];
int thrReceiveClientCount = 0;

int main()
{
    //初始化全局变量
    //memset(arrConSocket,0,sizeof(struct MySocketInfo)*10);

    printf("开始socket\n");
    /* 创建TCP连接的Socket套接字 */
    int socketListen = socket(AF_INET, SOCK_STREAM, 0);
    if(socketListen < 0){
        printf("创建TCP套接字失败\n");
        exit(-1);
    }else{
        printf("创建套接字成功\n");
    }
    /* 填充服务器端口地址信息，以便下面使用此地址和端口监听 */
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(struct sockaddr_in));
    server_addr.sin_family=AF_INET;
    server_addr.sin_addr.s_addr=htonl(INADDR_ANY); /* 这里地址使用全0，即所有 */
    server_addr.sin_port=htons(2000);
    if(bind(socketListen, (struct sockaddr *)&server_addr,sizeof(struct sockaddr)) != 0){
        perror("绑定ip地址、端口号失败\n");
        exit(-1);
    }else{
        printf("绑定ip地址,端口号\n");
    }
    /* 开始监听相应的端口 */
    if(listen(socketListen, 10) != 0){
        printf("开启监听失败\n");
        exit(-1);
    }else{
        printf("开启监听成功\n");
    }
    /* 接受连接套接字 */
    pthread_t thrAccept;
    pthread_create(&thrAccept,NULL,fun_thrAcceptHandler,&socketListen);

    /* 实时发送数据 */
    while(1){
        //判断线程存活多少
        int i;
        for(i=0;i<thrReceiveClientCount;i++){
            if(checkThrIsKill(arrThrReceiveClient[i]) == 1){
                printf("有个线程被杀了\n");
                thrReceiveClientCount--;
            }
        }
        printf("当前有接受数据线程多少个：%d\n",thrReceiveClientCount);

        // 可以录入用户操作选项，并进行相应操作
        char userStr[30] = {'0'};
        scanf("%s",userStr);
        if(strcmp(userStr,"q") == 0){
            printf("用户选择退出！\n");
            break;
        }
        // 发送消息
        if(conClientCount <= 0){
            printf("没有客户端连接\n");
        }else{
            int i;
            for(i=0; i<conClientCount; i++){
                //int sendMsg_len = send(arrConSocket[i].socketCon, userStr, 30, 0);
                int sendMsg_len = write(arrConSocket[i].socketCon,userStr,30);
                if(sendMsg_len > 0){
                    printf("向%s:%d发送成功\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }else{
                    printf("向%s:%d发送失败\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }
            }
        }

        sleep(0.5);
    }

    // 等待子进程退出
    printf("等待子线程退出，即将退出！\n");
    char *message;
    pthread_join(thrAccept,(void *)&message);
    printf("%s\n",message);

    return 0;
}

void *fun_thrAcceptHandler(void *socketListen){
    while(1){
        int sockaddr_in_size = sizeof(struct sockaddr_in);
        struct sockaddr_in client_addr;
        int _socketListen = *((int *)socketListen);
        int socketCon = accept(_socketListen, (struct sockaddr *)(&client_addr), (socklen_t *)(&sockaddr_in_size));
        if(socketCon < 0){
            printf("连接失败\n");
        }else{
            printf("连接成功 ip: %s:%d\r\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
        }
        printf("连接套接字为：%d\n",socketCon);
        //开启新的通讯线程，负责同连接上来的客户端进行通讯
        _MySocketInfo socketInfo;
        socketInfo.socketCon = socketCon;
        socketInfo.ipaddr = inet_ntoa(client_addr.sin_addr);
        socketInfo.port = client_addr.sin_port;
        arrConSocket[conClientCount] = socketInfo;
        conClientCount++;
        printf("连接了%d个用户\n",conClientCount);

        pthread_t thrReceive = 0;
        pthread_create(&thrReceive,NULL,fun_thrReceiveHandler,&socketInfo);
        arrThrReceiveClient[thrReceiveClientCount] = thrReceive;
        thrReceiveClientCount++;

        //让进程休息1秒
        sleep(0.5);
    }

    char *s = "安全退出接受进程";
    pthread_exit(s);
}

void *fun_thrReceiveHandler(void *socketInfo){
	char buffer[30];
	int buffer_length;
	_MySocketInfo _socketInfo = *((_MySocketInfo *)socketInfo);
    while(1){
    	//添加对buffer清零
    	bzero(&buffer,sizeof(buffer));

        buffer_length = read(_socketInfo.socketCon,buffer,30);
        if(buffer_length == 0){
            printf("%s:%d 客户端关闭\n",_socketInfo.ipaddr,_socketInfo.port);
            conClientCount--;
            break;
        }else if(buffer_length < 0){
            printf("接受客户端数据失败\n");
            break;
        }
        buffer[buffer_length] = '\0';
        printf("%s:%d 说：%s\n",_socketInfo.ipaddr,_socketInfo.port,buffer);

        sleep(0.2);
    }
    printf("接受数据线程结束了\n");
    return NULL;
}

int checkThrIsKill(pthread_t thr){
    int res = 1;
    int res_kill = pthread_kill(thr,0);
    if(res_kill == 0){
        res = 0;
    }
    return res;
}

#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <string.h>
#include <signal.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>
//服务器端

void *fun_thrReceiveHandler(void *socketInfo);
void *fun_thrAcceptHandler(void *socketListen);
//1:是 0：否
int checkThrIsKill(pthread_t thr);

typedef struct MySocketInfo{
    int socketCon;
    char *ipaddr;
    uint16_t port;
}_MySocketInfo;

// 客户端数组
struct MySocketInfo arrConSocket[10];
int conClientCount = 0;

// 接受客户端线程列表
pthread_t arrThrReceiveClient[10];
int thrReceiveClientCount = 0;

int main()
{
    //初始化全局变量
    //memset(arrConSocket,0,sizeof(struct MySocketInfo)*10);

    printf("开始socket\n");
    /* 创建TCP连接的Socket套接字 */
    int socketListen = socket(AF_INET, SOCK_STREAM, 0);
    if(socketListen < 0){
        printf("创建TCP套接字失败\n");
        exit(-1);
    }else{
        printf("创建套接字成功\n");
    }
    /* 填充服务器端口地址信息，以便下面使用此地址和端口监听 */
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(struct sockaddr_in));
    server_addr.sin_family=AF_INET;
    server_addr.sin_addr.s_addr=htonl(INADDR_ANY); /* 这里地址使用全0，即所有 */
    server_addr.sin_port=htons(2000);
    if(bind(socketListen, (struct sockaddr *)&server_addr,sizeof(struct sockaddr)) != 0){
        perror("绑定ip地址、端口号失败\n");
        exit(-1);
    }else{
        printf("绑定ip地址,端口号\n");
    }
    /* 开始监听相应的端口 */
    if(listen(socketListen, 10) != 0){
        printf("开启监听失败\n");
        exit(-1);
    }else{
        printf("开启监听成功\n");
    }
    /* 接受连接套接字 */
    pthread_t thrAccept;
    pthread_create(&thrAccept,NULL,fun_thrAcceptHandler,&socketListen);

    /* 实时发送数据 */
    while(1){
        //判断线程存活多少
        int i;
        for(i=0;i<thrReceiveClientCount;i++){
            if(checkThrIsKill(arrThrReceiveClient[i]) == 1){
                printf("有个线程被杀了\n");
                thrReceiveClientCount--;
            }
        }
        printf("当前有接受数据线程多少个：%d\n",thrReceiveClientCount);

        // 可以录入用户操作选项，并进行相应操作
        char userStr[30] = {'0'};
        scanf("%s",userStr);
        if(strcmp(userStr,"q") == 0){
            printf("用户选择退出！\n");
            break;
        }
        // 发送消息
        if(conClientCount <= 0){
            printf("没有客户端连接\n");
        }else{
            int i;
            for(i=0; i<conClientCount; i++){
                //int sendMsg_len = send(arrConSocket[i].socketCon, userStr, 30, 0);
                int sendMsg_len = write(arrConSocket[i].socketCon,userStr,30);
                if(sendMsg_len > 0){
                    printf("向%s:%d发送成功\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }else{
                    printf("向%s:%d发送失败\n",arrConSocket[i].ipaddr,arrConSocket[i].port);
                }
            }
        }

        sleep(0.5);
    }

    // 等待子进程退出
    printf("等待子线程退出，即将退出！\n");
    char *message;
    pthread_join(thrAccept,(void *)&message);
    printf("%s\n",message);

    return 0;
}

void *fun_thrAcceptHandler(void *socketListen){
    while(1){
        int sockaddr_in_size = sizeof(struct sockaddr_in);
        struct sockaddr_in client_addr;
        int _socketListen = *((int *)socketListen);
        int socketCon = accept(_socketListen, (struct sockaddr *)(&client_addr), (socklen_t *)(&sockaddr_in_size));
        if(socketCon < 0){
            printf("连接失败\n");
        }else{
            printf("连接成功 ip: %s:%d\r\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
        }
        printf("连接套接字为：%d\n",socketCon);
        //开启新的通讯线程，负责同连接上来的客户端进行通讯
        _MySocketInfo socketInfo;
        socketInfo.socketCon = socketCon;
        socketInfo.ipaddr = inet_ntoa(client_addr.sin_addr);
        socketInfo.port = client_addr.sin_port;
        arrConSocket[conClientCount] = socketInfo;
        conClientCount++;
        printf("连接了%d个用户\n",conClientCount);

        pthread_t thrReceive = 0;
        pthread_create(&thrReceive,NULL,fun_thrReceiveHandler,&socketInfo);
        arrThrReceiveClient[thrReceiveClientCount] = thrReceive;
        thrReceiveClientCount++;

        //让进程休息1秒
        sleep(0.5);
    }

    char *s = "安全退出接受进程";
    pthread_exit(s);
}

void *fun_thrReceiveHandler(void *socketInfo){
	char buffer[30];
	int buffer_length;
	_MySocketInfo _socketInfo = *((_MySocketInfo *)socketInfo);
    while(1){
    	//添加对buffer清零
    	bzero(&buffer,sizeof(buffer));

        buffer_length = read(_socketInfo.socketCon,buffer,30);
        if(buffer_length == 0){
            printf("%s:%d 客户端关闭\n",_socketInfo.ipaddr,_socketInfo.port);
            conClientCount--;
            break;
        }else if(buffer_length < 0){
            printf("接受客户端数据失败\n");
            break;
        }
        buffer[buffer_length] = '\0';
        printf("%s:%d 说：%s\n",_socketInfo.ipaddr,_socketInfo.port,buffer);

        sleep(0.2);
    }
    printf("接受数据线程结束了\n");
    return NULL;
}

int checkThrIsKill(pthread_t thr){
    int res = 1;
    int res_kill = pthread_kill(thr,0);
    if(res_kill == 0){
        res = 0;
    }
    return res;
}

客户端

#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <string.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>

typedef struct MySocketInfo{
    int socketCon;
    unsigned long ipaddr;
    unsigned short port;
}_MySocketInfo;

void *fun_thrReceiveHandler(void *socketCon);
int checkThrIsKill(pthread_t thr);

int main()
{
    printf("开始socket\n");
    /* 创建TCP连接的Socket套接字 */
    int socketCon = socket(AF_INET, SOCK_STREAM, 0);
    if(socketCon < 0){
        printf("创建TCP连接套接字失败\n");
        exit(-1);
    }
    /* 填充客户端端口地址信息，以便下面使用此地址和端口监听 */
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(struct sockaddr_in));
    server_addr.sin_family=AF_INET;
    server_addr.sin_addr.s_addr=inet_addr("127.0.0.1"); /* 这里地址使用全0，即所有 */
    server_addr.sin_port=htons(2000);
    /* 连接服务器 */
    int res_con = connect(socketCon,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr));
    if(res_con != 0){
        printf("连接失败\n");
        exit(-1);
    }
    printf("连接成功,连接结果为：%d\n",res_con);
    //开启新的实时接受数据线程
    pthread_t thrReceive;
    pthread_create(&thrReceive,NULL,fun_thrReceiveHandler,&socketCon);

    /* 实时发送数据 */
    while(1){
        //检测接受服务器数据线程是否被杀死


        char userStr[30] = {'0'};
        // 可以录入用户操作选项，并进行相应操作
        scanf("%s",userStr);
        if(strcmp(userStr,"q") == 0){
            printf("用户选择退出！\n");
            break;
        }
        // 发送消息
        //int sendMsg_len = send(socketCon, userStr, 30, 0);
        int sendMsg_len = write(socketCon,userStr,30);
        if(sendMsg_len > 0){
            printf("发送成功,服务端套接字句柄:%d\n",socketCon);
        }else{
            printf("发送失败\n");
        }

        //if(checkThrIsKill(thrReceive) == 1){
            //printf("接受服务器数据的线程已被关闭，退出程序\n");
            //break;
        //}
    }
    // 关闭套接字
    close(socketCon);
    return 0;
}

void *fun_thrReceiveHandler(void *socketCon){
    while(1){
        char buffer[30];
        int _socketCon = *((int *)socketCon);
        //int buffer_length = recv(_socketCon,buffer,30,0);
        int buffer_length = read(_socketCon,buffer,30);
        if(buffer_length == 0){
            printf("服务器端异常关闭\n");
            exit(-1);
        }else if(buffer_length < 0){
            printf("接受客户端数据失败\n");
            break;
        }
        buffer[buffer_length] = '\0';
        printf("服务器说：%s\n",buffer);
    }
    printf("退出接受服务器数据线程\n");
    return NULL;
}

int checkThrIsKill(pthread_t thr){
    int res = 1;
    int res_kill = pthread_kill(thr,0);
    if(res_kill == 0){
        res = 0;
    }
    return res;
}