unix域数据报回射程序（不完整）

一、服务器程序

int main(int argc, char **argv)

{

    int                    sockfd;

    struct sockaddr_un    servaddr, cliaddr;

    sockfd = socket(AF_LOCAL, SOCK_DGRAM, );

    unlink(UNIXDG_PATH);

    bzero(&servaddr, sizeof(servaddr));

    servaddr.sun_family = AF_LOCAL;

    strcpy(servaddr.sun_path, UNIXDG_PATH);

    bind(sockfd, (SA *) &servaddr, sizeof(servaddr));

    dg_echo(sockfd, (SA *) &cliaddr, sizeof(cliaddr));

}

二、客户端程序

int main(int argc, char **argv)

{

    int                    sockfd;

    struct sockaddr_un    cliaddr, servaddr;

    sockfd = socket(AF_LOCAL, SOCK_DGRAM, );

    bzero(&cliaddr, sizeof(cliaddr));    /* bind an address for us */

    cliaddr.sun_family = AF_LOCAL;

    strcpy(cliaddr.sun_path, tmpnam(NULL));

    bind(sockfd, (SA *) &cliaddr, sizeof(cliaddr));

    bzero(&servaddr, sizeof(servaddr));  /* fill in server's address */

    servaddr.sun_family = AF_LOCAL;

    strcpy(servaddr.sun_path, UNIXDG_PATH);

    dg_cli(stdin, sockfd, (SA *) &servaddr, sizeof(servaddr));

    exit();

}