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1cb54e58 | 1 | /* |
2 | * Copyright (C)2005 USAGI/WIDE Project | |
ae665a52 | 3 | * |
1cb54e58 | 4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
ae665a52 | 8 | * |
1cb54e58 | 9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
ae665a52 | 13 | * |
1cb54e58 | 14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | /* | |
19 | * based on ip.c, iproute.c | |
20 | */ | |
21 | /* | |
22 | * Authors: | |
23 | * Masahide NAKAMURA @USAGI | |
24 | */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <netinet/icmp6.h> | |
30 | #include "utils.h" | |
31 | ||
32 | /* prefix flags; see kernel's net/ipv6/addrconf.c and include/net/if_inet6.h */ | |
33 | #define IF_PREFIX_ONLINK 0x01 | |
34 | #define IF_PREFIX_AUTOCONF 0x02 | |
35 | ||
36 | int print_prefix(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) | |
37 | { | |
38 | FILE *fp = (FILE*)arg; | |
39 | struct prefixmsg *prefix = NLMSG_DATA(n); | |
40 | int len = n->nlmsg_len; | |
41 | struct rtattr * tb[RTA_MAX+1]; | |
42 | int family = preferred_family; | |
43 | ||
44 | if (n->nlmsg_type != RTM_NEWPREFIX) { | |
45 | fprintf(stderr, "Not a prefix: %08x %08x %08x\n", | |
46 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); | |
47 | return 0; | |
48 | } | |
49 | ||
50 | len -= NLMSG_LENGTH(sizeof(*prefix)); | |
51 | if (len < 0) { | |
52 | fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); | |
53 | return -1; | |
54 | } | |
55 | ||
56 | if (family == AF_UNSPEC) | |
57 | family = AF_INET6; | |
58 | if (family != AF_INET6) | |
59 | return 0; | |
60 | ||
61 | if (prefix->prefix_family != AF_INET6) { | |
62 | fprintf(stderr, "wrong family %d\n", prefix->prefix_family); | |
63 | return 0; | |
64 | } | |
65 | if (prefix->prefix_type != ND_OPT_PREFIX_INFORMATION) { | |
66 | fprintf(stderr, "wrong ND type %d\n", prefix->prefix_type); | |
67 | return 0; | |
68 | } | |
69 | ||
1cb54e58 | 70 | parse_rtattr(tb, RTA_MAX, RTM_RTA(prefix), len); |
71 | ||
72 | fprintf(fp, "prefix "); | |
73 | ||
74 | if (tb[PREFIX_ADDRESS]) { | |
75 | struct in6_addr *pfx; | |
76 | char abuf[256]; | |
77 | ||
78 | pfx = (struct in6_addr *)RTA_DATA(tb[PREFIX_ADDRESS]); | |
79 | ||
80 | memset(abuf, '\0', sizeof(abuf)); | |
ae665a52 | 81 | fprintf(fp, "%s", rt_addr_n2a(family, sizeof(*pfx), pfx, |
1cb54e58 | 82 | abuf, sizeof(abuf))); |
83 | } | |
84 | fprintf(fp, "/%u ", prefix->prefix_len); | |
85 | ||
86 | fprintf(fp, "dev %s ", ll_index_to_name(prefix->prefix_ifindex)); | |
87 | ||
88 | if (prefix->prefix_flags & IF_PREFIX_ONLINK) | |
89 | fprintf(fp, "onlink "); | |
90 | if (prefix->prefix_flags & IF_PREFIX_AUTOCONF) | |
91 | fprintf(fp, "autoconf "); | |
92 | ||
93 | if (tb[PREFIX_CACHEINFO]) { | |
94 | struct prefix_cacheinfo *pc; | |
95 | pc = (struct prefix_cacheinfo *)tb[PREFIX_CACHEINFO]; | |
96 | ||
97 | fprintf(fp, "valid %u ", pc->valid_time); | |
98 | fprintf(fp, "preferred %u ", pc->preferred_time); | |
99 | } | |
100 | ||
101 | fprintf(fp, "\n"); | |
102 | fflush(fp); | |
103 | ||
104 | return 0; | |
105 | } | |
106 |