paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Prefix related functions. |
| 3 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro |
| 4 | * |
| 5 | * This file is part of GNU Zebra. |
| 6 | * |
| 7 | * GNU Zebra is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2, or (at your option) any |
| 10 | * later version. |
| 11 | * |
| 12 | * GNU Zebra is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free |
| 19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 20 | * 02111-1307, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <zebra.h> |
| 24 | |
| 25 | #include "prefix.h" |
| 26 | #include "vty.h" |
| 27 | #include "sockunion.h" |
| 28 | #include "memory.h" |
| 29 | #include "log.h" |
| 30 | |
| 31 | /* Maskbit. */ |
Stephen Hemminger | 2d362d1 | 2009-12-21 12:54:58 +0300 | [diff] [blame] | 32 | static const u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 33 | 0xf8, 0xfc, 0xfe, 0xff}; |
Renato Westphal | fe67e66 | 2012-03-23 16:27:40 -0300 | [diff] [blame] | 34 | |
Denis Ovsienko | 21f569e | 2011-10-17 21:11:10 +0400 | [diff] [blame] | 35 | static const struct in6_addr maskbytes6[] = |
| 36 | { |
| 37 | /* /0 */ { { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 38 | /* /1 */ { { { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 39 | /* /2 */ { { { 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 40 | /* /3 */ { { { 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 41 | /* /4 */ { { { 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 42 | /* /5 */ { { { 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 43 | /* /6 */ { { { 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 44 | /* /7 */ { { { 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 45 | /* /8 */ { { { 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 46 | /* /9 */ { { { 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 47 | /* /10 */ { { { 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 48 | /* /11 */ { { { 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 49 | /* /12 */ { { { 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 50 | /* /13 */ { { { 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 51 | /* /14 */ { { { 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 52 | /* /15 */ { { { 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 53 | /* /16 */ { { { 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 54 | /* /17 */ { { { 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 55 | /* /18 */ { { { 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 56 | /* /19 */ { { { 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 57 | /* /20 */ { { { 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 58 | /* /21 */ { { { 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 59 | /* /22 */ { { { 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 60 | /* /23 */ { { { 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 61 | /* /24 */ { { { 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 62 | /* /25 */ { { { 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 63 | /* /26 */ { { { 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 64 | /* /27 */ { { { 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 65 | /* /28 */ { { { 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 66 | /* /29 */ { { { 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 67 | /* /30 */ { { { 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 68 | /* /31 */ { { { 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 69 | /* /32 */ { { { 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 70 | /* /33 */ { { { 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 71 | /* /34 */ { { { 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 72 | /* /35 */ { { { 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 73 | /* /36 */ { { { 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 74 | /* /37 */ { { { 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 75 | /* /38 */ { { { 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 76 | /* /39 */ { { { 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 77 | /* /40 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 78 | /* /41 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 79 | /* /42 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 80 | /* /43 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 81 | /* /44 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 82 | /* /45 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 83 | /* /46 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 84 | /* /47 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 85 | /* /48 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 86 | /* /49 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 87 | /* /50 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 88 | /* /51 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 89 | /* /52 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 90 | /* /53 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 91 | /* /54 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 92 | /* /55 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 93 | /* /56 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 94 | /* /57 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 95 | /* /58 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 96 | /* /59 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 97 | /* /60 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 98 | /* /61 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 99 | /* /62 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 100 | /* /63 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 101 | /* /64 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 102 | /* /65 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 103 | /* /66 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 104 | /* /67 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 105 | /* /68 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 106 | /* /69 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 107 | /* /70 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 108 | /* /71 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 109 | /* /72 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 110 | /* /73 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 111 | /* /74 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 112 | /* /75 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 113 | /* /76 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 114 | /* /77 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 115 | /* /78 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 116 | /* /79 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 117 | /* /80 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 118 | /* /81 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 119 | /* /82 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 120 | /* /83 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 121 | /* /84 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 122 | /* /85 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 123 | /* /86 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 124 | /* /87 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 125 | /* /88 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, |
| 126 | /* /89 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00 } } }, |
| 127 | /* /90 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00 } } }, |
| 128 | /* /91 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00 } } }, |
| 129 | /* /92 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00 } } }, |
| 130 | /* /93 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00 } } }, |
| 131 | /* /94 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00 } } }, |
| 132 | /* /95 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00 } } }, |
| 133 | /* /96 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 } } }, |
| 134 | /* /97 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00 } } }, |
| 135 | /* /98 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00 } } }, |
| 136 | /* /99 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00 } } }, |
| 137 | /* /100 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00 } } }, |
| 138 | /* /101 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00 } } }, |
| 139 | /* /102 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00 } } }, |
| 140 | /* /103 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00 } } }, |
| 141 | /* /104 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00 } } }, |
| 142 | /* /105 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00 } } }, |
| 143 | /* /106 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00 } } }, |
| 144 | /* /107 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00 } } }, |
| 145 | /* /108 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00 } } }, |
| 146 | /* /109 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00 } } }, |
| 147 | /* /110 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00 } } }, |
| 148 | /* /111 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00 } } }, |
| 149 | /* /112 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00 } } }, |
| 150 | /* /113 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00 } } }, |
| 151 | /* /114 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00 } } }, |
| 152 | /* /115 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00 } } }, |
| 153 | /* /116 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00 } } }, |
| 154 | /* /117 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00 } } }, |
| 155 | /* /118 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00 } } }, |
| 156 | /* /119 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00 } } }, |
| 157 | /* /120 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 } } }, |
| 158 | /* /121 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80 } } }, |
| 159 | /* /122 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0 } } }, |
| 160 | /* /123 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0 } } }, |
| 161 | /* /124 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0 } } }, |
| 162 | /* /125 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8 } } }, |
| 163 | /* /126 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc } } }, |
| 164 | /* /127 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe } } }, |
| 165 | /* /128 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } } } |
| 166 | }; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 167 | |
| 168 | /* Number of bits in prefix type. */ |
| 169 | #ifndef PNBBY |
| 170 | #define PNBBY 8 |
| 171 | #endif /* PNBBY */ |
| 172 | |
| 173 | #define MASKBIT(offset) ((0xff << (PNBBY - (offset))) & 0xff) |
| 174 | |
Paul Jakma | f63f06d | 2011-04-08 12:44:43 +0100 | [diff] [blame] | 175 | unsigned int |
| 176 | prefix_bit (const u_char *prefix, const u_char prefixlen) |
| 177 | { |
| 178 | unsigned int offset = prefixlen / 8; |
| 179 | unsigned int shift = 7 - (prefixlen % 8); |
| 180 | |
| 181 | return (prefix[offset] >> shift) & 1; |
| 182 | } |
| 183 | |
| 184 | unsigned int |
| 185 | prefix6_bit (const struct in6_addr *prefix, const u_char prefixlen) |
| 186 | { |
| 187 | return prefix_bit((const u_char *) &prefix->s6_addr, prefixlen); |
| 188 | } |
| 189 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 190 | /* Address Famiy Identifier to Address Family converter. */ |
| 191 | int |
Michael Lambert | 4c9641b | 2010-07-22 13:20:55 -0400 | [diff] [blame] | 192 | afi2family (afi_t afi) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 193 | { |
| 194 | if (afi == AFI_IP) |
| 195 | return AF_INET; |
| 196 | #ifdef HAVE_IPV6 |
| 197 | else if (afi == AFI_IP6) |
| 198 | return AF_INET6; |
| 199 | #endif /* HAVE_IPV6 */ |
| 200 | return 0; |
| 201 | } |
| 202 | |
Michael Lambert | 4c9641b | 2010-07-22 13:20:55 -0400 | [diff] [blame] | 203 | afi_t |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 204 | family2afi (int family) |
| 205 | { |
| 206 | if (family == AF_INET) |
| 207 | return AFI_IP; |
| 208 | #ifdef HAVE_IPV6 |
| 209 | else if (family == AF_INET6) |
| 210 | return AFI_IP6; |
| 211 | #endif /* HAVE_IPV6 */ |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | /* If n includes p prefix then return 1 else return 0. */ |
| 216 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 217 | prefix_match (const struct prefix *n, const struct prefix *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 218 | { |
| 219 | int offset; |
| 220 | int shift; |
Paul Jakma | d358344 | 2010-01-24 21:41:02 +0000 | [diff] [blame] | 221 | const u_char *np, *pp; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 222 | |
| 223 | /* If n's prefix is longer than p's one return 0. */ |
| 224 | if (n->prefixlen > p->prefixlen) |
| 225 | return 0; |
| 226 | |
Paul Jakma | d358344 | 2010-01-24 21:41:02 +0000 | [diff] [blame] | 227 | /* Set both prefix's head pointer. */ |
| 228 | np = (const u_char *)&n->u.prefix; |
| 229 | pp = (const u_char *)&p->u.prefix; |
| 230 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 231 | offset = n->prefixlen / PNBBY; |
| 232 | shift = n->prefixlen % PNBBY; |
| 233 | |
| 234 | if (shift) |
| 235 | if (maskbit[shift] & (np[offset] ^ pp[offset])) |
| 236 | return 0; |
| 237 | |
| 238 | while (offset--) |
| 239 | if (np[offset] != pp[offset]) |
| 240 | return 0; |
| 241 | return 1; |
| 242 | } |
| 243 | |
| 244 | /* Copy prefix from src to dest. */ |
| 245 | void |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 246 | prefix_copy (struct prefix *dest, const struct prefix *src) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 247 | { |
| 248 | dest->family = src->family; |
| 249 | dest->prefixlen = src->prefixlen; |
| 250 | |
| 251 | if (src->family == AF_INET) |
| 252 | dest->u.prefix4 = src->u.prefix4; |
| 253 | #ifdef HAVE_IPV6 |
| 254 | else if (src->family == AF_INET6) |
| 255 | dest->u.prefix6 = src->u.prefix6; |
| 256 | #endif /* HAVE_IPV6 */ |
| 257 | else if (src->family == AF_UNSPEC) |
| 258 | { |
| 259 | dest->u.lp.id = src->u.lp.id; |
| 260 | dest->u.lp.adv_router = src->u.lp.adv_router; |
| 261 | } |
| 262 | else |
| 263 | { |
ajs | b9e7028 | 2004-12-08 17:14:45 +0000 | [diff] [blame] | 264 | zlog (NULL, LOG_ERR, "prefix_copy(): Unknown address family %d", |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 265 | src->family); |
| 266 | assert (0); |
| 267 | } |
| 268 | } |
| 269 | |
gdt | 9d24baa | 2004-01-13 14:55:40 +0000 | [diff] [blame] | 270 | /* |
| 271 | * Return 1 if the address/netmask contained in the prefix structure |
| 272 | * is the same, and else return 0. For this routine, 'same' requires |
| 273 | * that not only the prefix length and the network part be the same, |
| 274 | * but also the host part. Thus, 10.0.0.1/8 and 10.0.0.2/8 are not |
| 275 | * the same. Note that this routine has the same return value sense |
| 276 | * as '==' (which is different from prefix_cmp). |
| 277 | */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 278 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 279 | prefix_same (const struct prefix *p1, const struct prefix *p2) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 280 | { |
| 281 | if (p1->family == p2->family && p1->prefixlen == p2->prefixlen) |
| 282 | { |
| 283 | if (p1->family == AF_INET) |
Denis Ovsienko | fe40bfa | 2011-12-18 15:40:17 +0400 | [diff] [blame] | 284 | if (IPV4_ADDR_SAME (&p1->u.prefix4.s_addr, &p2->u.prefix4.s_addr)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 285 | return 1; |
| 286 | #ifdef HAVE_IPV6 |
| 287 | if (p1->family == AF_INET6 ) |
Denis Ovsienko | fe40bfa | 2011-12-18 15:40:17 +0400 | [diff] [blame] | 288 | if (IPV6_ADDR_SAME (&p1->u.prefix6.s6_addr, &p2->u.prefix6.s6_addr)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 289 | return 1; |
| 290 | #endif /* HAVE_IPV6 */ |
| 291 | } |
| 292 | return 0; |
| 293 | } |
| 294 | |
gdt | 9d24baa | 2004-01-13 14:55:40 +0000 | [diff] [blame] | 295 | /* |
| 296 | * Return 0 if the network prefixes represented by the struct prefix |
| 297 | * arguments are the same prefix, and 1 otherwise. Network prefixes |
| 298 | * are considered the same if the prefix lengths are equal and the |
| 299 | * network parts are the same. Host bits (which are considered masked |
| 300 | * by the prefix length) are not significant. Thus, 10.0.0.1/8 and |
| 301 | * 10.0.0.2/8 are considered equivalent by this routine. Note that |
| 302 | * this routine has the same return sense as strcmp (which is different |
| 303 | * from prefix_same). |
| 304 | */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 305 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 306 | prefix_cmp (const struct prefix *p1, const struct prefix *p2) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 307 | { |
| 308 | int offset; |
| 309 | int shift; |
| 310 | |
| 311 | /* Set both prefix's head pointer. */ |
paul | 8cc4198 | 2005-05-06 21:25:49 +0000 | [diff] [blame] | 312 | const u_char *pp1 = (const u_char *)&p1->u.prefix; |
| 313 | const u_char *pp2 = (const u_char *)&p2->u.prefix; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 314 | |
| 315 | if (p1->family != p2->family || p1->prefixlen != p2->prefixlen) |
| 316 | return 1; |
| 317 | |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 318 | offset = p1->prefixlen / PNBBY; |
| 319 | shift = p1->prefixlen % PNBBY; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 320 | |
| 321 | if (shift) |
| 322 | if (maskbit[shift] & (pp1[offset] ^ pp2[offset])) |
| 323 | return 1; |
| 324 | |
| 325 | while (offset--) |
| 326 | if (pp1[offset] != pp2[offset]) |
| 327 | return 1; |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
David Lamparter | 17e5206 | 2010-02-02 20:16:35 +0100 | [diff] [blame] | 332 | /* |
| 333 | * Count the number of common bits in 2 prefixes. The prefix length is |
| 334 | * ignored for this function; the whole prefix is compared. If the prefix |
| 335 | * address families don't match, return -1; otherwise the return value is |
| 336 | * in range 0 ... maximum prefix length for the address family. |
| 337 | */ |
| 338 | int |
| 339 | prefix_common_bits (const struct prefix *p1, const struct prefix *p2) |
| 340 | { |
| 341 | int pos, bit; |
| 342 | int length = 0; |
| 343 | u_char xor; |
| 344 | |
| 345 | /* Set both prefix's head pointer. */ |
| 346 | const u_char *pp1 = (const u_char *)&p1->u.prefix; |
| 347 | const u_char *pp2 = (const u_char *)&p2->u.prefix; |
| 348 | |
| 349 | if (p1->family == AF_INET) |
| 350 | length = IPV4_MAX_BYTELEN; |
| 351 | #ifdef HAVE_IPV6 |
| 352 | if (p1->family == AF_INET6) |
| 353 | length = IPV6_MAX_BYTELEN; |
| 354 | #endif |
| 355 | if (p1->family != p2->family || !length) |
| 356 | return -1; |
| 357 | |
| 358 | for (pos = 0; pos < length; pos++) |
| 359 | if (pp1[pos] != pp2[pos]) |
| 360 | break; |
| 361 | if (pos == length) |
| 362 | return pos * 8; |
| 363 | |
| 364 | xor = pp1[pos] ^ pp2[pos]; |
| 365 | for (bit = 0; bit < 8; bit++) |
| 366 | if (xor & (1 << (7 - bit))) |
| 367 | break; |
| 368 | |
| 369 | return pos * 8 + bit; |
| 370 | } |
| 371 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 372 | /* Return prefix family type string. */ |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 373 | const char * |
| 374 | prefix_family_str (const struct prefix *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 375 | { |
| 376 | if (p->family == AF_INET) |
| 377 | return "inet"; |
| 378 | #ifdef HAVE_IPV6 |
| 379 | if (p->family == AF_INET6) |
| 380 | return "inet6"; |
| 381 | #endif /* HAVE_IPV6 */ |
| 382 | return "unspec"; |
| 383 | } |
| 384 | |
| 385 | /* Allocate new prefix_ipv4 structure. */ |
| 386 | struct prefix_ipv4 * |
| 387 | prefix_ipv4_new () |
| 388 | { |
| 389 | struct prefix_ipv4 *p; |
| 390 | |
ajs | 7907c6c | 2005-07-26 19:55:31 +0000 | [diff] [blame] | 391 | /* Call prefix_new to allocate a full-size struct prefix to avoid problems |
| 392 | where the struct prefix_ipv4 is cast to struct prefix and unallocated |
| 393 | bytes were being referenced (e.g. in structure assignments). */ |
| 394 | p = (struct prefix_ipv4 *)prefix_new(); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 395 | p->family = AF_INET; |
| 396 | return p; |
| 397 | } |
| 398 | |
| 399 | /* Free prefix_ipv4 structure. */ |
| 400 | void |
| 401 | prefix_ipv4_free (struct prefix_ipv4 *p) |
| 402 | { |
ajs | 7907c6c | 2005-07-26 19:55:31 +0000 | [diff] [blame] | 403 | prefix_free((struct prefix *)p); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | /* When string format is invalid return 0. */ |
| 407 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 408 | str2prefix_ipv4 (const char *str, struct prefix_ipv4 *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 409 | { |
| 410 | int ret; |
| 411 | int plen; |
| 412 | char *pnt; |
| 413 | char *cp; |
| 414 | |
| 415 | /* Find slash inside string. */ |
| 416 | pnt = strchr (str, '/'); |
| 417 | |
| 418 | /* String doesn't contail slash. */ |
| 419 | if (pnt == NULL) |
| 420 | { |
| 421 | /* Convert string to prefix. */ |
| 422 | ret = inet_aton (str, &p->prefix); |
| 423 | if (ret == 0) |
| 424 | return 0; |
| 425 | |
| 426 | /* If address doesn't contain slash we assume it host address. */ |
| 427 | p->family = AF_INET; |
| 428 | p->prefixlen = IPV4_MAX_BITLEN; |
| 429 | |
| 430 | return ret; |
| 431 | } |
| 432 | else |
| 433 | { |
| 434 | cp = XMALLOC (MTYPE_TMP, (pnt - str) + 1); |
| 435 | strncpy (cp, str, pnt - str); |
| 436 | *(cp + (pnt - str)) = '\0'; |
| 437 | ret = inet_aton (cp, &p->prefix); |
| 438 | XFREE (MTYPE_TMP, cp); |
| 439 | |
| 440 | /* Get prefix length. */ |
| 441 | plen = (u_char) atoi (++pnt); |
hasso | 3fb9cd6 | 2004-10-19 19:44:43 +0000 | [diff] [blame] | 442 | if (plen > IPV4_MAX_PREFIXLEN) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 443 | return 0; |
| 444 | |
| 445 | p->family = AF_INET; |
| 446 | p->prefixlen = plen; |
| 447 | } |
| 448 | |
| 449 | return ret; |
| 450 | } |
| 451 | |
Denis Ovsienko | 051954f | 2011-10-11 15:17:45 +0400 | [diff] [blame] | 452 | /* Convert masklen into IP address's netmask (network byte order). */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 453 | void |
Denis Ovsienko | 9663386 | 2011-10-08 18:15:21 +0400 | [diff] [blame] | 454 | masklen2ip (const int masklen, struct in_addr *netmask) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 455 | { |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 456 | assert (masklen >= 0 && masklen <= IPV4_MAX_BITLEN); |
David Lamparter | e96b312 | 2012-04-04 00:14:36 +0200 | [diff] [blame] | 457 | |
| 458 | /* left shift is only defined for less than the size of the type. |
| 459 | * we unconditionally use long long in case the target platform |
| 460 | * has defined behaviour for << 32 (or has a 64-bit left shift) */ |
| 461 | |
| 462 | if (sizeof(unsigned long long) > 4) |
| 463 | netmask->s_addr = htonl(0xffffffffULL << (32 - masklen)); |
| 464 | else |
| 465 | netmask->s_addr = htonl(masklen ? 0xffffffffU << (32 - masklen) : 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | /* Convert IP address's netmask into integer. We assume netmask is |
| 469 | sequential one. Argument netmask should be network byte order. */ |
| 470 | u_char |
| 471 | ip_masklen (struct in_addr netmask) |
| 472 | { |
David Lamparter | e96b312 | 2012-04-04 00:14:36 +0200 | [diff] [blame] | 473 | uint32_t tmp = ~ntohl(netmask.s_addr); |
| 474 | if (tmp) |
| 475 | /* clz: count leading zeroes. sadly, the behaviour of this builtin |
| 476 | * is undefined for a 0 argument, even though most CPUs give 32 */ |
| 477 | return __builtin_clz(tmp); |
| 478 | else |
| 479 | return 32; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 480 | } |
| 481 | |
Denis Ovsienko | caff790 | 2011-10-18 18:33:53 +0400 | [diff] [blame] | 482 | /* Apply mask to IPv4 prefix (network byte order). */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 483 | void |
| 484 | apply_mask_ipv4 (struct prefix_ipv4 *p) |
| 485 | { |
David Lamparter | e96b312 | 2012-04-04 00:14:36 +0200 | [diff] [blame] | 486 | struct in_addr mask; |
| 487 | masklen2ip(p->prefixlen, &mask); |
| 488 | p->prefix.s_addr &= mask.s_addr; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /* If prefix is 0.0.0.0/0 then return 1 else return 0. */ |
| 492 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 493 | prefix_ipv4_any (const struct prefix_ipv4 *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 494 | { |
| 495 | return (p->prefix.s_addr == 0 && p->prefixlen == 0); |
| 496 | } |
| 497 | |
| 498 | #ifdef HAVE_IPV6 |
| 499 | |
| 500 | /* Allocate a new ip version 6 route */ |
| 501 | struct prefix_ipv6 * |
paul | 8cc4198 | 2005-05-06 21:25:49 +0000 | [diff] [blame] | 502 | prefix_ipv6_new (void) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 503 | { |
| 504 | struct prefix_ipv6 *p; |
| 505 | |
ajs | 7907c6c | 2005-07-26 19:55:31 +0000 | [diff] [blame] | 506 | /* Allocate a full-size struct prefix to avoid problems with structure |
| 507 | size mismatches. */ |
| 508 | p = (struct prefix_ipv6 *)prefix_new(); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 509 | p->family = AF_INET6; |
| 510 | return p; |
| 511 | } |
| 512 | |
| 513 | /* Free prefix for IPv6. */ |
| 514 | void |
| 515 | prefix_ipv6_free (struct prefix_ipv6 *p) |
| 516 | { |
ajs | 7907c6c | 2005-07-26 19:55:31 +0000 | [diff] [blame] | 517 | prefix_free((struct prefix *)p); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | /* If given string is valid return pin6 else return NULL */ |
| 521 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 522 | str2prefix_ipv6 (const char *str, struct prefix_ipv6 *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 523 | { |
| 524 | char *pnt; |
| 525 | char *cp; |
| 526 | int ret; |
| 527 | |
| 528 | pnt = strchr (str, '/'); |
| 529 | |
| 530 | /* If string doesn't contain `/' treat it as host route. */ |
| 531 | if (pnt == NULL) |
| 532 | { |
| 533 | ret = inet_pton (AF_INET6, str, &p->prefix); |
Paul Jakma | c4cf095 | 2009-08-08 20:41:39 +0100 | [diff] [blame] | 534 | if (ret == 0) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 535 | return 0; |
| 536 | p->prefixlen = IPV6_MAX_BITLEN; |
| 537 | } |
| 538 | else |
| 539 | { |
| 540 | int plen; |
| 541 | |
| 542 | cp = XMALLOC (0, (pnt - str) + 1); |
| 543 | strncpy (cp, str, pnt - str); |
| 544 | *(cp + (pnt - str)) = '\0'; |
| 545 | ret = inet_pton (AF_INET6, cp, &p->prefix); |
| 546 | free (cp); |
Paul Jakma | c4cf095 | 2009-08-08 20:41:39 +0100 | [diff] [blame] | 547 | if (ret == 0) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 548 | return 0; |
| 549 | plen = (u_char) atoi (++pnt); |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 550 | if (plen > IPV6_MAX_BITLEN) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 551 | return 0; |
| 552 | p->prefixlen = plen; |
| 553 | } |
| 554 | p->family = AF_INET6; |
| 555 | |
| 556 | return ret; |
| 557 | } |
| 558 | |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 559 | /* Convert struct in6_addr netmask into integer. |
| 560 | * FIXME return u_char as ip_maskleni() does. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 561 | int |
| 562 | ip6_masklen (struct in6_addr netmask) |
| 563 | { |
| 564 | int len = 0; |
| 565 | unsigned char val; |
| 566 | unsigned char *pnt; |
| 567 | |
| 568 | pnt = (unsigned char *) & netmask; |
| 569 | |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 570 | while ((*pnt == 0xff) && len < IPV6_MAX_BITLEN) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 571 | { |
| 572 | len += 8; |
| 573 | pnt++; |
| 574 | } |
| 575 | |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 576 | if (len < IPV6_MAX_BITLEN) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 577 | { |
| 578 | val = *pnt; |
| 579 | while (val) |
| 580 | { |
| 581 | len++; |
| 582 | val <<= 1; |
| 583 | } |
| 584 | } |
| 585 | return len; |
| 586 | } |
| 587 | |
| 588 | void |
Denis Ovsienko | 21f569e | 2011-10-17 21:11:10 +0400 | [diff] [blame] | 589 | masklen2ip6 (const int masklen, struct in6_addr *netmask) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 590 | { |
Denis Ovsienko | 9ed79b5 | 2011-10-24 18:45:05 +0400 | [diff] [blame] | 591 | assert (masklen >= 0 && masklen <= IPV6_MAX_BITLEN); |
Denis Ovsienko | 21f569e | 2011-10-17 21:11:10 +0400 | [diff] [blame] | 592 | memcpy (netmask, maskbytes6 + masklen, sizeof (struct in6_addr)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | void |
| 596 | apply_mask_ipv6 (struct prefix_ipv6 *p) |
| 597 | { |
Denis Ovsienko | 8c7f49d | 2012-01-01 16:33:12 +0400 | [diff] [blame] | 598 | u_char *pnt; |
| 599 | int index; |
| 600 | int offset; |
| 601 | |
| 602 | index = p->prefixlen / 8; |
| 603 | |
| 604 | if (index < 16) |
| 605 | { |
| 606 | pnt = (u_char *) &p->prefix; |
| 607 | offset = p->prefixlen % 8; |
| 608 | |
| 609 | pnt[index] &= maskbit[offset]; |
| 610 | index++; |
| 611 | |
| 612 | while (index < 16) |
| 613 | pnt[index++] = 0; |
| 614 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | void |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 618 | str2in6_addr (const char *str, struct in6_addr *addr) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 619 | { |
| 620 | int i; |
| 621 | unsigned int x; |
| 622 | |
| 623 | /* %x must point to unsinged int */ |
| 624 | for (i = 0; i < 16; i++) |
| 625 | { |
| 626 | sscanf (str + (i * 2), "%02x", &x); |
| 627 | addr->s6_addr[i] = x & 0xff; |
| 628 | } |
| 629 | } |
| 630 | #endif /* HAVE_IPV6 */ |
| 631 | |
| 632 | void |
| 633 | apply_mask (struct prefix *p) |
| 634 | { |
| 635 | switch (p->family) |
| 636 | { |
| 637 | case AF_INET: |
| 638 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
| 639 | break; |
| 640 | #ifdef HAVE_IPV6 |
| 641 | case AF_INET6: |
| 642 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
| 643 | break; |
| 644 | #endif /* HAVE_IPV6 */ |
| 645 | default: |
| 646 | break; |
| 647 | } |
| 648 | return; |
| 649 | } |
| 650 | |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 651 | /* Utility function of convert between struct prefix <=> union sockunion. |
| 652 | * FIXME This function isn't used anywhere. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 653 | struct prefix * |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 654 | sockunion2prefix (const union sockunion *dest, |
| 655 | const union sockunion *mask) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 656 | { |
| 657 | if (dest->sa.sa_family == AF_INET) |
| 658 | { |
| 659 | struct prefix_ipv4 *p; |
| 660 | |
| 661 | p = prefix_ipv4_new (); |
| 662 | p->family = AF_INET; |
| 663 | p->prefix = dest->sin.sin_addr; |
| 664 | p->prefixlen = ip_masklen (mask->sin.sin_addr); |
| 665 | return (struct prefix *) p; |
| 666 | } |
| 667 | #ifdef HAVE_IPV6 |
| 668 | if (dest->sa.sa_family == AF_INET6) |
| 669 | { |
| 670 | struct prefix_ipv6 *p; |
| 671 | |
| 672 | p = prefix_ipv6_new (); |
| 673 | p->family = AF_INET6; |
| 674 | p->prefixlen = ip6_masklen (mask->sin6.sin6_addr); |
| 675 | memcpy (&p->prefix, &dest->sin6.sin6_addr, sizeof (struct in6_addr)); |
| 676 | return (struct prefix *) p; |
| 677 | } |
| 678 | #endif /* HAVE_IPV6 */ |
| 679 | return NULL; |
| 680 | } |
| 681 | |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 682 | /* Utility function of convert between struct prefix <=> union sockunion. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 683 | struct prefix * |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 684 | sockunion2hostprefix (const union sockunion *su) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 685 | { |
| 686 | if (su->sa.sa_family == AF_INET) |
| 687 | { |
| 688 | struct prefix_ipv4 *p; |
| 689 | |
| 690 | p = prefix_ipv4_new (); |
| 691 | p->family = AF_INET; |
| 692 | p->prefix = su->sin.sin_addr; |
| 693 | p->prefixlen = IPV4_MAX_BITLEN; |
| 694 | return (struct prefix *) p; |
| 695 | } |
| 696 | #ifdef HAVE_IPV6 |
| 697 | if (su->sa.sa_family == AF_INET6) |
| 698 | { |
| 699 | struct prefix_ipv6 *p; |
| 700 | |
| 701 | p = prefix_ipv6_new (); |
| 702 | p->family = AF_INET6; |
| 703 | p->prefixlen = IPV6_MAX_BITLEN; |
| 704 | memcpy (&p->prefix, &su->sin6.sin6_addr, sizeof (struct in6_addr)); |
| 705 | return (struct prefix *) p; |
| 706 | } |
| 707 | #endif /* HAVE_IPV6 */ |
| 708 | return NULL; |
| 709 | } |
| 710 | |
David Lamparter | 17e5206 | 2010-02-02 20:16:35 +0100 | [diff] [blame] | 711 | void |
| 712 | prefix2sockunion (const struct prefix *p, union sockunion *su) |
| 713 | { |
| 714 | memset (su, 0, sizeof (*su)); |
| 715 | |
| 716 | su->sa.sa_family = p->family; |
| 717 | if (p->family == AF_INET) |
| 718 | su->sin.sin_addr = p->u.prefix4; |
| 719 | #ifdef HAVE_IPV6 |
| 720 | if (p->family == AF_INET6) |
| 721 | memcpy (&su->sin6.sin6_addr, &p->u.prefix6, sizeof (struct in6_addr)); |
| 722 | #endif /* HAVE_IPV6 */ |
| 723 | } |
| 724 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 725 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 726 | prefix_blen (const struct prefix *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 727 | { |
| 728 | switch (p->family) |
| 729 | { |
| 730 | case AF_INET: |
| 731 | return IPV4_MAX_BYTELEN; |
| 732 | break; |
| 733 | #ifdef HAVE_IPV6 |
| 734 | case AF_INET6: |
| 735 | return IPV6_MAX_BYTELEN; |
| 736 | break; |
| 737 | #endif /* HAVE_IPV6 */ |
| 738 | } |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | /* Generic function for conversion string to struct prefix. */ |
| 743 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 744 | str2prefix (const char *str, struct prefix *p) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 745 | { |
| 746 | int ret; |
| 747 | |
| 748 | /* First we try to convert string to struct prefix_ipv4. */ |
| 749 | ret = str2prefix_ipv4 (str, (struct prefix_ipv4 *) p); |
| 750 | if (ret) |
| 751 | return ret; |
| 752 | |
| 753 | #ifdef HAVE_IPV6 |
| 754 | /* Next we try to convert string to struct prefix_ipv6. */ |
| 755 | ret = str2prefix_ipv6 (str, (struct prefix_ipv6 *) p); |
| 756 | if (ret) |
| 757 | return ret; |
| 758 | #endif /* HAVE_IPV6 */ |
| 759 | |
| 760 | return 0; |
| 761 | } |
| 762 | |
| 763 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 764 | prefix2str (const struct prefix *p, char *str, int size) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 765 | { |
| 766 | char buf[BUFSIZ]; |
| 767 | |
| 768 | inet_ntop (p->family, &p->u.prefix, buf, BUFSIZ); |
| 769 | snprintf (str, size, "%s/%d", buf, p->prefixlen); |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | struct prefix * |
| 774 | prefix_new () |
| 775 | { |
| 776 | struct prefix *p; |
| 777 | |
| 778 | p = XCALLOC (MTYPE_PREFIX, sizeof *p); |
| 779 | return p; |
| 780 | } |
| 781 | |
| 782 | /* Free prefix structure. */ |
| 783 | void |
| 784 | prefix_free (struct prefix *p) |
| 785 | { |
| 786 | XFREE (MTYPE_PREFIX, p); |
| 787 | } |
| 788 | |
| 789 | /* Utility function. Check the string only contains digit |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 790 | * character. |
| 791 | * FIXME str.[c|h] would be better place for this function. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 792 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 793 | all_digit (const char *str) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 794 | { |
| 795 | for (; *str != '\0'; str++) |
| 796 | if (!isdigit ((int) *str)) |
| 797 | return 0; |
| 798 | return 1; |
| 799 | } |
| 800 | |
| 801 | /* Utility function to convert ipv4 prefixes to Classful prefixes */ |
| 802 | void apply_classful_mask_ipv4 (struct prefix_ipv4 *p) |
| 803 | { |
| 804 | |
| 805 | u_int32_t destination; |
| 806 | |
| 807 | destination = ntohl (p->prefix.s_addr); |
| 808 | |
hasso | 3fb9cd6 | 2004-10-19 19:44:43 +0000 | [diff] [blame] | 809 | if (p->prefixlen == IPV4_MAX_PREFIXLEN); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 810 | /* do nothing for host routes */ |
| 811 | else if (IN_CLASSC (destination)) |
| 812 | { |
| 813 | p->prefixlen=24; |
| 814 | apply_mask_ipv4(p); |
| 815 | } |
| 816 | else if (IN_CLASSB(destination)) |
| 817 | { |
| 818 | p->prefixlen=16; |
| 819 | apply_mask_ipv4(p); |
| 820 | } |
| 821 | else |
| 822 | { |
| 823 | p->prefixlen=8; |
| 824 | apply_mask_ipv4(p); |
| 825 | } |
| 826 | } |
| 827 | |
hasso | 3fb9cd6 | 2004-10-19 19:44:43 +0000 | [diff] [blame] | 828 | in_addr_t |
| 829 | ipv4_network_addr (in_addr_t hostaddr, int masklen) |
| 830 | { |
| 831 | struct in_addr mask; |
| 832 | |
| 833 | masklen2ip (masklen, &mask); |
| 834 | return hostaddr & mask.s_addr; |
| 835 | } |
| 836 | |
| 837 | in_addr_t |
| 838 | ipv4_broadcast_addr (in_addr_t hostaddr, int masklen) |
| 839 | { |
| 840 | struct in_addr mask; |
| 841 | |
| 842 | masklen2ip (masklen, &mask); |
| 843 | return (masklen != IPV4_MAX_PREFIXLEN-1) ? |
| 844 | /* normal case */ |
| 845 | (hostaddr | ~mask.s_addr) : |
| 846 | /* special case for /31 */ |
| 847 | (hostaddr ^ ~mask.s_addr); |
| 848 | } |
| 849 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 850 | /* Utility function to convert ipv4 netmask to prefixes |
| 851 | ex.) "1.1.0.0" "255.255.0.0" => "1.1.0.0/16" |
| 852 | ex.) "1.0.0.0" NULL => "1.0.0.0/8" */ |
| 853 | int |
hasso | b04c699 | 2004-10-04 19:10:31 +0000 | [diff] [blame] | 854 | netmask_str2prefix_str (const char *net_str, const char *mask_str, |
| 855 | char *prefix_str) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 856 | { |
| 857 | struct in_addr network; |
| 858 | struct in_addr mask; |
| 859 | u_char prefixlen; |
| 860 | u_int32_t destination; |
| 861 | int ret; |
| 862 | |
| 863 | ret = inet_aton (net_str, &network); |
| 864 | if (! ret) |
| 865 | return 0; |
| 866 | |
| 867 | if (mask_str) |
| 868 | { |
| 869 | ret = inet_aton (mask_str, &mask); |
| 870 | if (! ret) |
| 871 | return 0; |
| 872 | |
| 873 | prefixlen = ip_masklen (mask); |
| 874 | } |
| 875 | else |
| 876 | { |
| 877 | destination = ntohl (network.s_addr); |
| 878 | |
| 879 | if (network.s_addr == 0) |
| 880 | prefixlen = 0; |
| 881 | else if (IN_CLASSC (destination)) |
| 882 | prefixlen = 24; |
| 883 | else if (IN_CLASSB (destination)) |
| 884 | prefixlen = 16; |
| 885 | else if (IN_CLASSA (destination)) |
| 886 | prefixlen = 8; |
| 887 | else |
| 888 | return 0; |
| 889 | } |
| 890 | |
| 891 | sprintf (prefix_str, "%s/%d", net_str, prefixlen); |
| 892 | |
| 893 | return 1; |
| 894 | } |
| 895 | |
hasso | 5920990 | 2005-04-05 14:36:49 +0000 | [diff] [blame] | 896 | #ifdef HAVE_IPV6 |
| 897 | /* Utility function for making IPv6 address string. */ |
| 898 | const char * |
hasso | 3a2ce6a | 2005-04-08 01:30:51 +0000 | [diff] [blame] | 899 | inet6_ntoa (struct in6_addr addr) |
hasso | 5920990 | 2005-04-05 14:36:49 +0000 | [diff] [blame] | 900 | { |
| 901 | static char buf[INET6_ADDRSTRLEN]; |
| 902 | |
hasso | 3a2ce6a | 2005-04-08 01:30:51 +0000 | [diff] [blame] | 903 | inet_ntop (AF_INET6, &addr, buf, INET6_ADDRSTRLEN); |
hasso | 5920990 | 2005-04-05 14:36:49 +0000 | [diff] [blame] | 904 | return buf; |
| 905 | } |
| 906 | #endif /* HAVE_IPV6 */ |