基于多线程的TCP并发服务器

多线程的TCP并发服务器的实现步骤：

1，创建一个socket套接字


2，绑定IP地址和端口信息到socket,使用函数bind()
1)IP地址

2）bind

3，设置允许的最大连接数，使用函数listen()

4,等待来自客户端的连接请求，使用函数accept()

5，收发数据，用函数recv()，send()/sendto()或者read(),write()
6，关闭网络连接，close

开始：建立文件

/*DATA:         2018-1-17
 *AUTHOR:       wg
 *DESCRIPTION:  多线程TCP服务器
 *  1，int socket(int domain,int type,int protocol);
 *  2, int bind(int sockfd,const struct sockaddr *addr,socklen_t addrlen);
 *  3, int listen(int sockfd,int backlog);
 *  4, accept(int sockfd,struct sockaddr *addr,socklen_t *addrlen);
 *  5, read(),write()
 */
 #include 
#include 
#include 
#include 
#include 
#include 
#include
#include
#include 
#include 

#define MAX_LISTEN 100
int ad[10];
char buf[128]={0};
struct sockaddr_in server_ip, remote_ip;

void *thread_fun(void *arg)
{
        while(1)
        {
        printf("read data from client : %s\n",inet_ntoa(remote_ip.sin_addr));
        memset(buf,0,128);
        read(ad[(int)arg],buf,128);
        printf("buf =%s\n",buf);
        }
return NULL;
}

int main()
{
        int server_len,remote_len;
        int err,sd;
        pthread_t tid[10];
        int i=0;
        
        sd=socket(AF_INET,SOCK_STREAM,0);
        if(sd == -1)
        {
                printf("create socket failure, errno =%d\n",sd);
                close(sd);
                return -1;
        }
        
        server_ip.sin_family =AF_INET;
        server_ip.sin_port = htons(10086);
        server_ip.sin_addr.s_addr =htonl(INADDR_ANY);
        memset(server_ip.sin_zero,0,8);
        
        err=bind(sd,(struct sockaddr *)(&server_ip),sizeof(struct sockaddr));
        if(err==-1)
        {
                printf("bind error,errno=%d\n",err);
                close(sd);
                return err;
        }
        err=listen(sd,MAX_LISTEN);
        if(err == -1)
        {
        printf("listen error ,errno =%d\n",err);
        close(sd);
        return err;
        }
        
        remote_len=sizeof(struct sockaddr);
        
        while(1)//listen n client quest
        {
        ad[i]=accept(sd,(struct sockaddr *)(&remote_ip),&remote_len);
        if(ad[i] !=0 )
        {
                printf("accept error,errno =%d\n",ad[i]);
                close(sd);
                return -2;
        }
        err=pthread_create(&tid[i],NULL,thread_fun,(void*)i);
        if(err !=0)
        {
        printf("create new thread failure\n");
        close(ad[i]);
        }
        ++i;
        }
        close(sd);
        
        return 0;
}

可循环监听和接收多个客服端的请求。

Tcp客户端创建步骤：
1，创建一个socket，使用函数socket()
2, 设置要连接的服务器地址和端口
3，连接服务器，使用函数connect()
4，收发数据，使用函数recv(),sendto(),或write()和read()
5, 关闭网络连接，close()

创建client.c文件

#include 
#include 
#include 
#include 
#include 
#include 
#include
#include
#include 
#include 

char buf[100];
int sd;
struct sockaddr_in server_ip;

void *thread_write(void *arg)
{
    while(1)
    {
        write(sd,"hello",6);
        sleep(1);
    }
    
 }
 
 void *thread_read(void *arg)
 {
    while(1)
    {
        sleep(1);
        memset(buf,0,100);
        read(sd,buf,100);
        printf("client 2 say: %s\n",buf);
    }
}

int main()
{
    int server_len, remote_len;
    pthread_t tid_read,tid_write;
    int err;
    
    sd=socket(AF_INET,SOCK_STREAM,0);
    if(sd == -1)
    {
        printf("create socket failure");
        return sd;
    }
    
    server_ip.sin_family =AF_INET;
    server_ip.sin_port = htons(10086);
    server_ip.sin_addr.s_addr = htonl(INADDR_ANY);
    memcpy(server_ip.sin_zero,0,8);
    
    err = connect(sd,(struct sockaddr *)(&server_ip),sizeof(struct sockaddr));
    if(err == -1)
    {
        printf("connect failure\n");
        close(sd);
        return err;
    }
    
    err = pthread_create(&tid_read,NULL,thread_read,NULL);
    if(err !=0)
    {
        printf("create read thread failure\n");
       close(sd);
       return err;
    }
    err = pthread_create(&tid_write,NULL,thread_write,NULL);
    if(err !=0)
    {
        printf("create write thread failure\n");
       close(sd);
       return err;
    }
    
    pthread_join(&tid_read,NULL);
    pthread_join(&tid_write,NULL);
    
    close(sd);
    return 0;
    
 }