linux c++的一个简单的server和client通信

//server.c

#include

#include

#include

#include

#include

#include

#include



int main(int argc,char* argv[])

{

    if(argc != 3)

    {

        printf("Usage: ./server [ip] [port]\n");

        return 1;

    }



    int sockfd = socket(AF_INET,SOCK_STREAM,0);

    if(sockfd < 0)

    {

        perror("sock");

        return 1;

    }



    struct sockaddr_in server;

    server.sin_family = AF_INET;

    server.sin_port = htons(atoi(argv[2]));

    server.sin_addr.s_addr = inet_addr(argv[1]);



    int bd = bind(sockfd,(struct sockaddr*)&server,sizeof(server));

    if(bd < 0)

    {

      perror("bind");

      return 1;

    }





    int ls = listen(sockfd,5);

    if(ls < 0)

    {

        perror("listen");

         return 1;

    }



    while(1)

    {

        struct sockaddr_in client;

        socklen_t len = sizeof(client);

      

        

        int  new_fd = accept(sockfd,(struct sockaddr*)&client,&len);

        if(new_fd < 0)

        {

            perror("accept");

            continue;

        }



        while(1)

        {

        char buf[1024] = {0};

        ssize_t read_size = read(new_fd,buf,sizeof(buf)-1);

        if(read_size < 0)

        {

            perror("read");

            continue;

        }

        if(read_size == 0)

        {

            printf("client close！\n");

            break;

        }



        buf[read_size] = '\0';

        printf("[%s:%d]:%s\n",inet_ntoa(client.sin_addr),ntohs(client.sin_port),buf);

        write(new_fd,buf,strlen(buf));

    }

        close(new_fd);

    }

    return 0;

}

//client

#include   

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

using namespace std; 

int main(int argc,char* argv[])

{



    if(argc != 3)

    {

        printf("Usage: ./client [ip] [port]\n");

        return 1;

    }



    int fd = socket(AF_INET,SOCK_STREAM,0);

        if(fd < 0)

        {

            perror("socket");

            return 1;

        }



    struct sockaddr_in server;

    server.sin_family = AF_INET;

    server.sin_port = htons(atoi(argv[2]));

    server.sin_addr.s_addr = inet_addr(argv[1]);



    int ret = connect(fd,(struct sockaddr*)&server,sizeof(server));

    

      if(ret < 0)

       {

      perror("connect");

       return 1;

      }else

      {

      printf("connect success!\n");

      }





    while(1)

    {

    char buf[1024] = {0};

    printf(">>>");

    fflush(stdout);

    int read_size = read(0,buf,sizeof(buf)-1);

    if(read_size < 0)

    {

        perror("read");

        continue;

    }

    if(read_size == 0)

    {

        printf("goodbye\n");

        break;

    }

    buf[read_size] = '\0';

    write(fd,buf,strlen(buf));

    char buf_output[1024] = {0};

    ssize_t size = read(fd,buf_output,sizeof(buf_output)-1);

    if(size < 0)

    {

        perror("read");

        continue;

    }

    if(size ==0)

    {

        printf("goodbye!");

        break;

    }

    buf_output[size] = '\0';

    printf("%s\n",buf_output);

    }



    close(fd);

    return 0;

}