8ae8844871
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3285 ec53bebd-3082-4978-b11e-865c3cabbd6b
252 lines
6.4 KiB
C
252 lines
6.4 KiB
C
/*
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* Copyright (c) 1997 Kungliga Tekniska Högskolan
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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 Kungliga Tekniska
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* Högskolan 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 "krb5_locl.h"
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RCSID("$Id$");
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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 __osf__
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/* hate */
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struct rtentry;
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struct mbuf;
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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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static krb5_error_code
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gethostname_fallback (krb5_addresses *res)
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{
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krb5_error_code err;
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char hostname[MAXHOSTNAMELEN];
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struct hostent *hostent;
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if (gethostname (hostname, sizeof(hostname)))
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return errno;
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hostent = gethostbyname (hostname);
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if (hostent == NULL)
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return errno;
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res->len = 1;
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res->val = malloc (sizeof(*res->val));
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if (res->val == NULL)
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return ENOMEM;
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res->val[0].addr_type = hostent->h_addrtype;
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res->val[0].address.data = NULL;
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res->val[0].address.length = 0;
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err = krb5_data_copy (&res->val[0].address,
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hostent->h_addr,
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hostent->h_length);
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if (err) {
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free (res->val);
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return err;
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}
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return 0;
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}
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/*
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*
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* Try to figure out the addresses of all configured interfaces with a
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* lot of magic ioctls.
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* Include loopback (lo*) interfaces iff loop.
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*/
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#if defined(SIOCGIFCONF) && defined(SIOCGIFFLAGS) && defined(SIOCGIFADDR)
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static krb5_error_code
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find_all_addresses (krb5_addresses *res, int loop)
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{
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krb5_error_code err;
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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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size_t sz;
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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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res->len = num;
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res->val = calloc(num, sizeof(*res->val));
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if (res->val == NULL) {
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close (fd);
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return ENOMEM;
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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;
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p < ifconf.ifc_buf + ifconf.ifc_len;
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p += sz) {
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struct ifreq *ifr = (struct ifreq *)p;
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/* This is somewhat kludgy, but it seems to work. */
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sz = sizeof(*ifr);
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#ifdef SOCKADDR_HAS_SA_LEN
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if(ifr->ifr_addr.sa_len)
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sz = sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len;
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#endif
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if(strncmp(ifreq.ifr_name,
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ifr->ifr_name,
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sizeof(ifr->ifr_name)) == 0)
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continue;
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if(ioctl(fd, SIOCGIFFLAGS, ifr) < 0) {
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close (fd);
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free (res->val);
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return errno;
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}
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if(!(ifr->ifr_flags & IFF_UP)
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|| (loop && ifr->ifr_flags & IFF_LOOPBACK))
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continue;
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/*
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* Get the address of the interface. If this fails, it's
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* usually because this interface is up, but has no address
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* configured. There might be some fatal errors for which
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* we should bail out, but now we prefer ignoring them.
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*/
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if(ioctl(fd, SIOCGIFADDR, ifr) < 0)
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continue;
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switch (ifr->ifr_addr.sa_family) {
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#ifdef AF_INET
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case AF_INET: {
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unsigned char addr[4];
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struct sockaddr_in *sin;
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res->val[j].addr_type = AF_INET;
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/* This is somewhat XXX */
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sin = (struct sockaddr_in*)&ifr->ifr_addr;
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memcpy(addr, &sin->sin_addr, 4);
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err = krb5_data_copy(&res->val[j].address,
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addr, 4);
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if (err) {
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close (fd);
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free (res->val);
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return ENOMEM;
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}
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++j;
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break;
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}
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#endif /* AF_INET */
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/*
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* This is not an correct nor ideal test.
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*/
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#if defined(AF_INET6) && defined(HAVE_NETINET_IN6_H)
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case AF_INET6: {
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res->val[j].addr_type = AF_INET6;
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err = krb5_data_copy(&res->val[j].address,
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&ifr->ifr_addr,
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sizeof(struct sockaddr_in6));
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if (err) {
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close (fd);
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free (res->val);
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return ENOMEM;
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}
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++j;
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break;
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}
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#endif /* AF_INET6 */
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default:
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break;
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}
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ifreq = *ifr;
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}
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close (fd);
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if (j != num) {
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void *tmp;
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res->len = j;
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tmp = realloc (res->val, j * sizeof(*res->val));
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if (tmp == NULL) {
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free (res->val);
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return ENOMEM;
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}
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res->val = tmp;
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}
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return 0;
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}
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#endif /* SIOCGIFCONF */
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/*
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* Try to get all addresses, but return the one corresponding to
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* `hostname' if we fail.
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*
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* Don't include any loopback addresses (interfaces of name lo*).
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*
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*/
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krb5_error_code
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krb5_get_all_client_addrs (krb5_addresses *res)
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{
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#if !defined(SIOCGIFCONF) || !defined(SIOCGIFFLAGS) || !defined(SIOCGIFADDR)
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return gethostname_fallback (res);
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#else
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return find_all_addresses (res, 0);
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#endif /* SIOCGIFCONF */
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}
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/*
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* XXX
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*/
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#if 0
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krb5_error_code
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krb5_get_all_server_addrs ()
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{
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return 0;
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}
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#endif
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