128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/*
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* Copyright (c) 2010-2015 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include "sudoers.h"
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#include "interfaces.h"
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#ifndef INADDR_NONE
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# define INADDR_NONE ((unsigned int)-1)
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#endif
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static struct interface_list interfaces;
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/*
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* Parse a space-delimited list of IP address/netmask pairs and
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* store in a list of interface structures.
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*/
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bool
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set_interfaces(const char *ai)
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{
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char *addrinfo, *addr, *mask;
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struct interface *ifp;
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bool rval = false;
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debug_decl(set_interfaces, SUDOERS_DEBUG_NETIF)
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if ((addrinfo = strdup(ai)) == NULL)
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debug_return_bool(false);
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for (addr = strtok(addrinfo, " \t"); addr != NULL; addr = strtok(NULL, " \t")) {
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/* Separate addr and mask. */
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if ((mask = strchr(addr, '/')) == NULL)
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continue;
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*mask++ = '\0';
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/* Parse addr and store in list. */
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if ((ifp = calloc(1, sizeof(*ifp))) == NULL)
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goto done;
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if (strchr(addr, ':')) {
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/* IPv6 */
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#ifdef HAVE_STRUCT_IN6_ADDR
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ifp->family = AF_INET6;
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if (inet_pton(AF_INET6, addr, &ifp->addr.ip6) != 1 ||
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inet_pton(AF_INET6, mask, &ifp->netmask.ip6) != 1)
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#endif
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{
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free(ifp);
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continue;
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}
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} else {
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/* IPv4 */
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ifp->family = AF_INET;
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if (inet_pton(AF_INET, addr, &ifp->addr.ip4) != 1 ||
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inet_pton(AF_INET, mask, &ifp->netmask.ip4) != 1) {
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free(ifp);
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continue;
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}
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}
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SLIST_INSERT_HEAD(&interfaces, ifp, entries);
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}
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rval = true;
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done:
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free(addrinfo);
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debug_return_bool(rval);
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}
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struct interface_list *
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get_interfaces(void)
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{
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return &interfaces;
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}
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void
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dump_interfaces(const char *ai)
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{
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const char *cp, *ep;
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const char *ai_end = ai + strlen(ai);
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debug_decl(set_interfaces, SUDOERS_DEBUG_NETIF)
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sudo_printf(SUDO_CONV_INFO_MSG,
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_("Local IP address and netmask pairs:\n"));
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cp = sudo_strsplit(ai, ai_end, " \t", &ep);
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while (cp != NULL) {
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sudo_printf(SUDO_CONV_INFO_MSG, "\t%.*s\n", (int)(ep - cp), cp);
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cp = sudo_strsplit(NULL, ai_end, " \t", &ep);
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}
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debug_return;
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}
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