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();
}