text: /*
   * Copyright (c) 2010-2013 Todd C. Miller <Todd.Miller@courtesan.com>
   *
   * 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 <config.h>
  
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <stdio.h>
  #ifdef STDC_HEADERS
  # include <stdlib.h>
  # include <stddef.h>
  #else
  # ifdef HAVE_STDLIB_H
  #  include <stdlib.h>
  # endif
  #endif /* STDC_HEADERS */
  #ifdef HAVE_STRING_H
  # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
  #  include <memory.h>
  # endif
  # include <string.h>
  #endif /* HAVE_STRING_H */
  #ifdef HAVE_STRINGS_H
  # include <strings.h>
  #endif /* HAVE_STRINGS_H */
  #ifdef HAVE_UNISTD_H
  # include <unistd.h>
  #endif /* HAVE_UNISTD_H */
  #include <netinet/in.h>  
  #include <arpa/inet.h>
  #include <netdb.h>
  #include <errno.h>
  
  #include "sudoers.h"
  #include "interfaces.h"
  
  #ifndef INADDR_NONE
  # define INADDR_NONE ((unsigned int)-1)
  #endif
  
  static struct interface_list interfaces;
  
  /*
   * Parse a space-delimited list of IP address/netmask pairs and
   * store in a list of interface structures.
   */
  void
  set_interfaces(const char *ai)
  {
      char *addrinfo, *addr, *mask;
      struct interface *ifp;
      debug_decl(set_interfaces, SUDO_DEBUG_NETIF)
  
      addrinfo = estrdup(ai);
      for (addr = strtok(addrinfo, " \t"); addr != NULL; addr = strtok(NULL, " \t")) {
  	/* Separate addr and mask. */
  	if ((mask = strchr(addr, '/')) == NULL)
  	    continue;
  	*mask++ = '\0';
  
  	/* Parse addr and store in list. */
  	ifp = ecalloc(1, sizeof(*ifp));
  	if (strchr(addr, ':')) {
  	    /* IPv6 */
  #ifdef HAVE_STRUCT_IN6_ADDR
  	    ifp->family = AF_INET6;
  	    if (inet_pton(AF_INET6, addr, &ifp->addr.ip6) != 1 ||
  		inet_pton(AF_INET6, mask, &ifp->netmask.ip6) != 1)
  #endif
  	    {
  		efree(ifp);
  		continue;
  	    }
  	} else {
  	    /* IPv4 */
  	    ifp->family = AF_INET;
  	    if (inet_pton(AF_INET, addr, &ifp->addr.ip4) != 1 ||
  		inet_pton(AF_INET, mask, &ifp->netmask.ip4) != 1) {
  		efree(ifp);
  		continue;
  	    }
  	}
  	SLIST_INSERT_HEAD(&interfaces, ifp, entries);
      }
      efree(addrinfo);
      debug_return;
  }
  
  struct interface_list *
  get_interfaces(void)
  {
      return &interfaces;
  }
  
  void
  dump_interfaces(const char *ai)
  {
      char *cp, *addrinfo;
      debug_decl(set_interfaces, SUDO_DEBUG_NETIF)
  
      addrinfo = estrdup(ai);
  
      sudo_printf(SUDO_CONV_INFO_MSG, _("Local IP address and netmask pairs:\n"));
      for (cp = strtok(addrinfo, " \t"); cp != NULL; cp = strtok(NULL, " \t"))
  	sudo_printf(SUDO_CONV_INFO_MSG, "\t%s\n", cp);
  
      efree(addrinfo);
      debug_return;
  }
  