blob: 20f23ca799aac3a873af64ecc9e3ed4cee4236fc [file] [log] [blame]
/*
* Copyright (C)2005 USAGI/WIDE Project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses>.
*/
/*
* based on ip.c, iproute.c
*/
/*
* Authors:
* Masahide NAKAMURA @USAGI
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/icmp6.h>
#include "utils.h"
#include "ip_common.h"
/* prefix flags; see kernel's net/ipv6/addrconf.c and include/net/if_inet6.h */
#define IF_PREFIX_ONLINK 0x01
#define IF_PREFIX_AUTOCONF 0x02
int print_prefix(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE *)arg;
struct prefixmsg *prefix = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr *tb[RTA_MAX+1];
int family = preferred_family;
if (n->nlmsg_type != RTM_NEWPREFIX) {
fprintf(stderr, "Not a prefix: %08x %08x %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
return 0;
}
len -= NLMSG_LENGTH(sizeof(*prefix));
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (family == AF_UNSPEC)
family = AF_INET6;
if (family != AF_INET6)
return 0;
if (prefix->prefix_family != AF_INET6) {
fprintf(stderr, "incorrect protocol family: %d\n", prefix->prefix_family);
return 0;
}
if (prefix->prefix_type != ND_OPT_PREFIX_INFORMATION) {
fprintf(stderr, "wrong ND type %d\n", prefix->prefix_type);
return 0;
}
parse_rtattr(tb, RTA_MAX, RTM_RTA(prefix), len);
if (tb[PREFIX_ADDRESS]) {
fprintf(fp, "prefix %s/%u",
rt_addr_n2a_rta(family, tb[PREFIX_ADDRESS]),
prefix->prefix_len);
}
fprintf(fp, "dev %s ", ll_index_to_name(prefix->prefix_ifindex));
if (prefix->prefix_flags & IF_PREFIX_ONLINK)
fprintf(fp, "onlink ");
if (prefix->prefix_flags & IF_PREFIX_AUTOCONF)
fprintf(fp, "autoconf ");
if (tb[PREFIX_CACHEINFO]) {
const struct prefix_cacheinfo *pc
= RTA_DATA(tb[PREFIX_CACHEINFO]);
fprintf(fp, "valid %u ", pc->valid_time);
fprintf(fp, "preferred %u ", pc->preferred_time);
}
fprintf(fp, "\n");
fflush(fp);
return 0;
}