linux网络编程，listen和connect

来源：互联网发布：数据终端设备有哪些编辑：程序博客网时间：2024/04/30 04:32

listentest.c
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define MYPORT 3490
#define BACKLOG 10

main()
{
        int sockfd,new_fd;
        struct sockaddr_in my_addr;
        struct sockaddr_in their_addr;
        int sin_size;

        sockfd = socket(AF_INET,SOCK_STREAM,0);
        my_addr.sin_family=AF_INET;
        my_addr.sin_port=htons(MYPORT);
        my_addr.sin_addr.s_addr=htonl(INADDR_ANY);
        bzero(&(my_addr.sin_zero),8);
        bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr));

        listen(sockfd,BACKLOG);
        while(1)
        {
                sin_size=sizeof(struct sockaddr_in);
                new_fd=accept(sockfd,&their_addr,&sin_size);

                printf("get connected:/n");
                printf("client IP adress:%s/n",inet_ntoa(their_addr.sin_addr));
                printf("    port : %d/n",their_addr.sin_port);
        }
        exit(0);
}

connecttest.c
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define DEST_IP "127.0.0.1"
#define DEST_PORT 3490

main()
{
        int sockfd;
        struct sockaddr_in dest_addr;
        sockfd=socket(AF_INET,SOCK_STREAM,0);

        dest_addr.sin_family=AF_INET;
        dest_addr.sin_port=htons(DEST_PORT);
        dest_addr.sin_addr.s_addr=inet_addr(DEST_IP);
        bzero(&(dest_addr.sin_zero),8);

        int ret=connect(sockfd,(struct sockaddr *)&dest_addr,sizeof(struct sockaddr));
        if(ret==-1)
        {
                printf("error linking");
                exit(0);
        }

        exit(0);
}