p12-17.c

来自「SUN Solaris8平台下进程间通信」· C语言 代码 · 共 23 行

int check_peer(int sockfd, in_addr_t *refuselist)
{
    socklen_t  len;
    struct sockaddr_in addr,raddr;
    in_addr_t s_addr;
    /* 查看与我连接的是谁 */
    len = sizeof(raddr);
    if (getpeername(sockfd, (struct sockaddr*)raddr, &len) < 0){
        printf("getpeername with socket %d failed\n", sockfd);
        return -1;
    }
    /* 拒绝来自特定地址的连接 */
    s_addr = raddr.sin_addr.s_addr;
    ap = refuse_addr_list;
    for (; ap!=0; ap++)
    if (*ap == s_addr){
        close(sockfd);
        return -1;
    }
    return 0;
}