UNIX域流式套接字一例

客户端：

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

typedef struct sockaddr SA;

#define N 256

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

    int sockfd;
    struct sockaddr_un myaddr;
    char buffer[N];

    if(argc < 2)
    {
        printf("usage:%s <sock file>\n",argv[0]);
        exit(-1);
    }

    if((sockfd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
    {
        perror("fail to socket");
        exit(-1);
    }

    bzero(&myaddr, sizeof(struct sockaddr_un));

    myaddr.sun_family = PF_UNIX;
    strcpy(myaddr.sun_path, argv[1]);

    if(connect(sockfd, (SA *)&myaddr, sizeof(myaddr)) < 0)
    {
        perror("fail to connect");
        exit(-1);
    }


    while(1)
    {

        fgets(buffer, N ,stdin);
        if(strncmp(buffer, "quit", 4) == 0)
        {
            break;
        }

        send(sockfd, buffer, N, 0);
        bzero(buffer, N);
        recv(sockfd, buffer, N, 0);

        printf("receive from server: %s", buffer);
    }

        close(sockfd);
    return 0;
}

服务器端：

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

typedef struct sockaddr SA;

#define N 256

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

    int listenfd, confd;
    struct sockaddr_un myaddr, peeraddr;
    socklen_t peerlen = sizeof(peeraddr);
    char buffer[N];

    if(argc < 2)
    {
        printf("usage:%s <sock file>\n",argv[0]);
        exit(-1);
    }

    if((listenfd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
    {
        perror("fail to socket");
        exit(-1);
    }

    bzero(&myaddr, sizeof(struct sockaddr_un));

    myaddr.sun_family = PF_UNIX;
    strcpy(myaddr.sun_path, argv[1]);

    remove(argv[1]);
    if(bind(listenfd, (SA *)&myaddr, sizeof(myaddr)) < 0)
    {
        perror("fail to bind");
        exit(-1);
    }

    if(listen(listenfd, 5) < 0)
    {
        perror("fail to listen");
        exit(-1);
    }

    bzero(&peeraddr, peerlen);

    while(1)
    {
        if((confd = accept(listenfd, (SA *)&peeraddr, &peerlen)) < 0)
        {
            perror("fail to accept");
            exit(-1);
        }

        printf("connetion from [%s]\n",peeraddr.sun_path);

        while(recv(confd, buffer, N, 0) > 0)
        {
            printf("receive from client > %s", buffer);

            send(confd, buffer, N, 0);
        }

        printf("connetion has closed\n");

        close(confd);

    }

    return 0;
}

 

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