/* $Id$ */ /* * Copyright (c) 2005 Dimitri Sokolyuk * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include "ifaddr.h" int if_ntoa(char *if_name, char **if_addr) { struct ifreq ifr; struct sockaddr_in sin; int fd; memset(&ifr, '\0', sizeof(ifr)); strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name) - 1); if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) err(1, "socket()"); if (ioctl(fd, SIOCGIFADDR, &ifr) < 0) { close(fd); err(1, "ioctl()"); } memcpy(&sin, &(ifr.ifr_addr), sizeof(sin)); *if_addr = inet_ntoa(sin.sin_addr); close(fd); return 0; }