socket 本地通讯

//发送端

#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/un.h>
#define N 64
#define MY_SOCK_PATH "./somepath"

int main(int argc, char *argv[])
{
    //./client 192.168.1.240 9000
    int sockfd;
    struct sockaddr_un servaddr;
    char buf[N] = {0};

 

 

  /*****************************设置通地址格式************************/

    if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
    {
        perror("socket");
        exit(-1);
    }

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sun_family = AF_UNIX;
    strncpy(servaddr.sun_path,MY_SOCK_PATH,sizeof(servaddr.sun_path)-1);

    /***********************向服务器发送连接请求*********************/
    if (connect(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr)) == -1)
    {
        perror("connect");
        exit(-1);
    }

    while (fgets(buf, N, stdin) != NULL)
    {
        buf[strlen(buf)-1] = 0;
        send(sockfd, buf, strlen(buf), 0);
        bzero(buf, sizeof(buf));
        recv(sockfd, buf, N, 0);
        printf("%s\n", buf);
    }

    close(sockfd);

    exit(0);
}

//接受端

#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/un.h>

#define N 64
#define MY_SOCK_PATH "somepath"
int main(int argc, char *argv[])
{
    //./server 192.168.1.240 9000
    int sockfd, connfd;
    struct sockaddr_un myaddr, peeraddr;
    socklen_t len;
    char buf[N] = {0};
    ssize_t n;

  /**********建立套接字*******************/
    if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
    {
        perror("socket");
        exit(-1);
    }

    bzero(&myaddr, sizeof(myaddr));
 /**********设置套接字族类(套接字地址格式)*******************/
  myaddr.sun_family = AF_UNIX;
  strcpy(myaddr.sun_path,MY_SOCK_PATH);
/**********给套接字分配本地地址*******************/
    if (bind(sockfd,(struct sockaddr *)&myaddr, sizeof(struct sockaddr_un)) == -1)
    {
        perror("bind");
        exit(-1);
    }
/**********建立监听队列*******************/
    if (listen(sockfd, 5) == -1)
    {
        perror("listen");
        exit(-1);
    }

    bzero(&peeraddr, sizeof(peeraddr));
    len = sizeof(peeraddr);

    while (1)
    {  /*******************接收等待队列上的第一个客户端连接请求*******在接收队列为空时该函数将阻塞*********************/
        if ((connfd = accept(sockfd, (struct sockaddr *)&peeraddr, &len)) == -1)
        {
            perror("accept");
            exit(-1);
        }
       
        //printf("welcome from %s :%d\n", inet_ntoa(peeraddr.sin_addr),
          //      ntohs(peeraddr.sin_port));

        while (1)
        {
            bzero(buf, sizeof(buf));
            n = recv(connfd, buf, N, 0);
            if (n == 0)
                break;
            buf[n] = 0;
            printf("n = %d: %s\n", n, buf);
            send(connfd, buf, n, 0);
        }

        close(connfd);
    }

    exit(0);
}