156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the Kungliga Tekniska
|
|
* Högskolan and its contributors.
|
|
*
|
|
* 4. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "krb_locl.h"
|
|
|
|
RCSID("$Id: getaddrs.c,v 1.26.2.1 1999/07/22 03:15:33 assar Exp $");
|
|
|
|
#if defined(HAVE_SYS_IOCTL_H) && SunOS != 40
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#ifdef HAVE_NET_IF_H
|
|
#ifdef __osf__
|
|
struct rtentry;
|
|
struct mbuf;
|
|
#endif
|
|
#ifdef _AIX
|
|
#undef __P /* XXX hack for AIX 4.3 */
|
|
#endif
|
|
#include <net/if.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_SOCKIO_H
|
|
#include <sys/sockio.h>
|
|
#endif /* HAVE_SYS_SOCKIO_H */
|
|
|
|
/*
|
|
* Return number and list of all local adresses.
|
|
*/
|
|
|
|
int
|
|
k_get_all_addrs (struct in_addr **l)
|
|
{
|
|
#if !defined(SIOCGIFCONF) || !defined(SIOCGIFFLAGS) || !defined(SIOCGIFADDR)
|
|
char name[MaxHostNameLen];
|
|
struct hostent *he;
|
|
|
|
if (gethostname(name, sizeof(name)) < 0)
|
|
return -1;
|
|
he = gethostbyname (name);
|
|
if (he == NULL)
|
|
return -1;
|
|
*l = malloc(sizeof(**l));
|
|
if (*l == NULL)
|
|
return -1;
|
|
memcpy (*l, he->h_addr_list[0], sizeof(*l));
|
|
return 1;
|
|
#else
|
|
int fd;
|
|
char *inbuf = NULL;
|
|
size_t in_len = 8192;
|
|
struct ifreq ifreq;
|
|
struct ifconf ifconf;
|
|
int num, j;
|
|
char *p;
|
|
size_t sz;
|
|
|
|
*l = NULL;
|
|
fd = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
for(;;) {
|
|
void *tmp;
|
|
|
|
tmp = realloc (inbuf, in_len);
|
|
if (tmp == NULL)
|
|
goto fail;
|
|
inbuf = tmp;
|
|
|
|
ifconf.ifc_len = in_len;
|
|
ifconf.ifc_buf = inbuf;
|
|
|
|
if(ioctl(fd, SIOCGIFCONF, &ifconf) < 0)
|
|
goto fail;
|
|
if(ifconf.ifc_len + sizeof(ifreq) < in_len)
|
|
break;
|
|
in_len *= 2;
|
|
}
|
|
num = ifconf.ifc_len / sizeof(struct ifreq);
|
|
*l = malloc(num * sizeof(struct in_addr));
|
|
if(*l == NULL)
|
|
goto fail;
|
|
|
|
j = 0;
|
|
ifreq.ifr_name[0] = '\0';
|
|
for (p = ifconf.ifc_buf; p < ifconf.ifc_buf + ifconf.ifc_len; p += sz) {
|
|
struct ifreq *ifr = (struct ifreq *)p;
|
|
sz = sizeof(*ifr);
|
|
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
|
|
sz = max(sz, sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len);
|
|
#endif
|
|
|
|
if(strncmp(ifreq.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name))) {
|
|
if(ioctl(fd, SIOCGIFFLAGS, ifr) < 0)
|
|
continue;
|
|
if (ifr->ifr_flags & IFF_UP) {
|
|
if(ioctl(fd, SIOCGIFADDR, ifr) < 0)
|
|
continue;
|
|
(*l)[j++] = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr;
|
|
}
|
|
ifreq = *ifr;
|
|
}
|
|
}
|
|
if (j != num) {
|
|
void *tmp;
|
|
tmp = realloc (*l, j * sizeof(struct in_addr));
|
|
if(tmp == NULL)
|
|
goto fail;
|
|
*l = tmp;
|
|
}
|
|
close (fd);
|
|
free(inbuf);
|
|
return j;
|
|
fail:
|
|
close(fd);
|
|
free(inbuf);
|
|
free(*l);
|
|
return -1;
|
|
#endif /* SIOCGIFCONF */
|
|
}
|