+++ /dev/null
-// $Id: listdevip.c 965 2004-02-20 16:59:40Z ensc $
-
-// Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
-// based on listdevip.cc by Jacques Gelinas
-//
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 2, or (at your option)
-// any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-/*
- Print the list of all network (IP) devices. Print the IP
- in fact, including all aliases.
-*/
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-#include "compat.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <netinet/in.h>
-#include <net/if.h>
-
-
-static int ifconfig_ioctl(
- int fd,
- const char *ifname,
- int cmd,
- struct ifreq *ifr)
-{
- strcpy(ifr->ifr_name, ifname);
- return ioctl(fd, cmd,ifr);
-}
-
-
-static int devlist_read2_2()
-{
- int ret = -1;
- int skfd = socket (AF_INET,SOCK_DGRAM,0);
- if (skfd < 0) {
- perror ("listdevip: socket()");
- }else{
- struct ifconf ifc;
- int numreqs = 30;
- ifc.ifc_buf = NULL;
- ret = 0;
- while (1) {
- ifc.ifc_len = sizeof(struct ifreq) * numreqs;
- ifc.ifc_buf = (char*)realloc(ifc.ifc_buf, ifc.ifc_len);
-
- if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) {
- perror("listdevip: SIOCGIFCONF");
- ret = -1;
- break;
- }
- if (ifc.ifc_len == (int)sizeof(struct ifreq) * numreqs) {
- /* assume it overflowed and try again */
- numreqs += 10;
- continue;
- }
- break;
- }
- if (ret == 0){
- struct ifreq *ifr = ifc.ifc_req;
- int n;
- for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
- struct sockaddr_in *sin = (struct sockaddr_in*)&ifr->ifr_addr;
- unsigned long addr = ntohl(sin->sin_addr.s_addr);
- unsigned long mask = 0xffffff00;
- struct ifreq ifmask;
- if (ifconfig_ioctl(skfd,ifr->ifr_name,SIOCGIFNETMASK, &ifmask) >= 0){
- struct sockaddr_in *sin = (struct sockaddr_in*)&ifmask.ifr_addr;
- mask = ntohl(sin->sin_addr.s_addr);
- }
-
- printf ("%lu.%lu.%lu.%lu/%lu.%lu.%lu.%lu\n"
- ,(addr>>24)&0xff
- ,(addr>>16)&0xff
- ,(addr>>8)&0xff
- ,addr&0xff
- ,(mask>>24)&0xff
- ,(mask>>16)&0xff
- ,(mask>>8)&0xff
- ,mask&0xff);
- ifr++;
- }
- }
- free(ifc.ifc_buf);
- }
- return ret;
-}
-
-int main (int UNUSED argc, char UNUSED *argv[])
-{
- devlist_read2_2();
- return 0;
-}
-