131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
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/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H<EFBFBD>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Kungliga Tekniska
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* H<EFBFBD>gskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb_locl.h"
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RCSID("$Id: getaddrs.c,v 1.19 1997/04/01 08:18:29 joda Exp $");
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#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#ifdef HAVE_SYS_SOCKIO_H
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#include <sys/sockio.h>
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#endif /* HAVE_SYS_SOCKIO_H */
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/*
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* Return number and list of all local adresses.
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*/
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int
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k_get_all_addrs (struct in_addr **l)
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{
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#if !defined(SIOCGIFCONF) || !defined(SIOCGIFFLAGS) || !defined(SIOCGIFADDR)
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char name[MaxHostNameLen];
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struct hostent *he;
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if (k_gethostname(name, sizeof(name)) < 0)
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return -1;
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he = gethostbyname (name);
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if (he == NULL)
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return -1;
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*l = malloc(sizeof(**l));
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if (*l == NULL)
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return -1;
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memcpy (*l, he->h_addr_list[0], sizeof(*l));
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return 1;
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#else
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int fd;
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char buf[BUFSIZ];
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struct ifreq ifreq;
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struct ifconf ifconf;
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int num, j;
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char *p;
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fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd < 0)
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return -1;
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ifconf.ifc_len = sizeof(buf);
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ifconf.ifc_buf = buf;
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if(ioctl(fd, SIOCGIFCONF, &ifconf) < 0)
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return -1;
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num = ifconf.ifc_len / sizeof(struct ifreq);
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*l = malloc(num * sizeof(struct in_addr));
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if(*l == NULL) {
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close (fd);
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return -1;
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}
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j = 0;
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ifreq.ifr_name[0] = '\0';
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for (p = ifconf.ifc_buf; p < ifconf.ifc_buf + ifconf.ifc_len;) {
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struct ifreq *ifr = (struct ifreq *)p;
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#ifdef SOCKADDR_HAS_SA_LEN
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size_t sz = sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len;
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#else
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size_t sz = sizeof(*ifr);
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#endif
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if(strncmp(ifreq.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name))) {
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if(ioctl(fd, SIOCGIFFLAGS, ifr) < 0) {
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close (fd);
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free (*l);
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return -1;
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}
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if (ifr->ifr_flags & IFF_UP) {
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if(ioctl(fd, SIOCGIFADDR, ifr) < 0) {
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close (fd);
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free (*l);
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return -1;
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}
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(*l)[j++] = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr;
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}
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ifreq = *ifr;
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}
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p = p + sz;
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}
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if (j != num)
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*l = realloc (*l, j * sizeof(struct in_addr));
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close (fd);
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return j;
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#endif /* SIOCGIFCONF */
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}
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