embedaddon/quagga/lib/prefix.c - view

File: [ELWIX - Embedded LightWeight unIX -] / embedaddon / quagga / lib / prefix.c
Revision 1.1.1.3 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Wed Nov 2 10:09:11 2016 UTC (7 years, 7 months ago) by misho
Branches: quagga, MAIN
CVS tags: v1_0_20160315, HEAD

quagga 1.0.20160315

/* * Prefix related functions. * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro * * This file is part of GNU Zebra. * * GNU Zebra 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, or (at your option) any * later version. * * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. */ #include <zebra.h> #include "prefix.h" #include "vty.h" #include "sockunion.h" #include "memory.h" #include "log.h" /* Maskbit. */ static const u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; static const struct in6_addr maskbytes6[] = { /* /0 */ { { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /1 */ { { { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /2 */ { { { 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /3 */ { { { 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /4 */ { { { 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /5 */ { { { 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /6 */ { { { 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /7 */ { { { 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /8 */ { { { 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /9 */ { { { 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /10 */ { { { 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /11 */ { { { 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /12 */ { { { 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /13 */ { { { 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /14 */ { { { 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /15 */ { { { 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /16 */ { { { 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /17 */ { { { 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /18 */ { { { 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /19 */ { { { 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /20 */ { { { 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /21 */ { { { 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /22 */ { { { 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /23 */ { { { 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /24 */ { { { 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /25 */ { { { 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /26 */ { { { 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /27 */ { { { 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /28 */ { { { 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /29 */ { { { 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /30 */ { { { 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /31 */ { { { 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /32 */ { { { 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /33 */ { { { 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /34 */ { { { 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /35 */ { { { 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /36 */ { { { 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /37 */ { { { 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /38 */ { { { 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /39 */ { { { 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /40 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /41 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /42 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /43 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /44 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /45 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /46 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /47 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /48 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /49 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /50 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /51 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /52 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /53 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /54 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /55 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /56 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /57 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /58 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /59 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /60 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /61 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /62 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /63 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /64 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /65 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /66 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /67 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /68 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /69 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /70 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /71 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /72 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /73 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /74 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /75 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /76 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /77 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /78 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /79 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /80 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /81 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /82 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /83 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /84 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /85 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /86 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /87 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /88 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, /* /89 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00 } } }, /* /90 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00 } } }, /* /91 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00 } } }, /* /92 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00 } } }, /* /93 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00 } } }, /* /94 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00 } } }, /* /95 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00 } } }, /* /96 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 } } }, /* /97 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00 } } }, /* /98 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00 } } }, /* /99 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00 } } }, /* /100 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00 } } }, /* /101 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00 } } }, /* /102 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00 } } }, /* /103 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00 } } }, /* /104 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00 } } }, /* /105 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00 } } }, /* /106 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00 } } }, /* /107 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00 } } }, /* /108 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00 } } }, /* /109 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00 } } }, /* /110 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00 } } }, /* /111 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00 } } }, /* /112 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00 } } }, /* /113 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00 } } }, /* /114 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00 } } }, /* /115 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00 } } }, /* /116 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00 } } }, /* /117 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00 } } }, /* /118 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00 } } }, /* /119 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00 } } }, /* /120 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 } } }, /* /121 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80 } } }, /* /122 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0 } } }, /* /123 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0 } } }, /* /124 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0 } } }, /* /125 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8 } } }, /* /126 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc } } }, /* /127 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe } } }, /* /128 */ { { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } } } }; /* Number of bits in prefix type. */ #ifndef PNBBY #define PNBBY 8 #endif /* PNBBY */ #define MASKBIT(offset) ((0xff << (PNBBY - (offset))) & 0xff) unsigned int prefix_bit (const u_char *prefix, const u_char prefixlen) { unsigned int offset = prefixlen / 8; unsigned int shift = 7 - (prefixlen % 8); return (prefix[offset] >> shift) & 1; } unsigned int prefix6_bit (const struct in6_addr *prefix, const u_char prefixlen) { return prefix_bit((const u_char *) &prefix->s6_addr, prefixlen); } int str2family(const char *string) { if (!strcmp("ipv4", string)) return AF_INET; else if (!strcmp("ipv6", string)) return AF_INET6; else return -1; } /* Address Famiy Identifier to Address Family converter. */ int afi2family (afi_t afi) { if (afi == AFI_IP) return AF_INET; #ifdef HAVE_IPV6 else if (afi == AFI_IP6) return AF_INET6; #endif /* HAVE_IPV6 */ return 0; } afi_t family2afi (int family) { if (family == AF_INET) return AFI_IP; #ifdef HAVE_IPV6 else if (family == AF_INET6) return AFI_IP6; #endif /* HAVE_IPV6 */ return 0; } const char * safi2str(safi_t safi) { switch (safi) { case SAFI_UNICAST: return "unicast"; case SAFI_MULTICAST: return "multicast"; case SAFI_ENCAP: return "encap"; case SAFI_MPLS_VPN: return "vpn"; } return NULL; } /* If n includes p prefix then return 1 else return 0. */ int prefix_match (const struct prefix *n, const struct prefix *p) { int offset; int shift; const u_char *np, *pp; /* If n's prefix is longer than p's one return 0. */ if (n->prefixlen > p->prefixlen) return 0; /* Set both prefix's head pointer. */ np = (const u_char *)&n->u.prefix; pp = (const u_char *)&p->u.prefix; offset = n->prefixlen / PNBBY; shift = n->prefixlen % PNBBY; if (shift) if (maskbit[shift] & (np[offset] ^ pp[offset])) return 0; while (offset--) if (np[offset] != pp[offset]) return 0; return 1; } /* Copy prefix from src to dest. */ void prefix_copy (struct prefix *dest, const struct prefix *src) { dest->family = src->family; dest->prefixlen = src->prefixlen; if (src->family == AF_INET) dest->u.prefix4 = src->u.prefix4; #ifdef HAVE_IPV6 else if (src->family == AF_INET6) dest->u.prefix6 = src->u.prefix6; #endif /* HAVE_IPV6 */ else if (src->family == AF_UNSPEC) { dest->u.lp.id = src->u.lp.id; dest->u.lp.adv_router = src->u.lp.adv_router; } else { zlog (NULL, LOG_ERR, "prefix_copy(): Unknown address family %d", src->family); assert (0); } } /* * Return 1 if the address/netmask contained in the prefix structure * is the same, and else return 0. For this routine, 'same' requires * that not only the prefix length and the network part be the same, * but also the host part. Thus, 10.0.0.1/8 and 10.0.0.2/8 are not * the same. Note that this routine has the same return value sense * as '==' (which is different from prefix_cmp). */ int prefix_same (const struct prefix *p1, const struct prefix *p2) { if (p1->family == p2->family && p1->prefixlen == p2->prefixlen) { if (p1->family == AF_INET) if (IPV4_ADDR_SAME (&p1->u.prefix4.s_addr, &p2->u.prefix4.s_addr)) return 1; #ifdef HAVE_IPV6 if (p1->family == AF_INET6 ) if (IPV6_ADDR_SAME (&p1->u.prefix6.s6_addr, &p2->u.prefix6.s6_addr)) return 1; #endif /* HAVE_IPV6 */ } return 0; } /* * Return 0 if the network prefixes represented by the struct prefix * arguments are the same prefix, and 1 otherwise. Network prefixes * are considered the same if the prefix lengths are equal and the * network parts are the same. Host bits (which are considered masked * by the prefix length) are not significant. Thus, 10.0.0.1/8 and * 10.0.0.2/8 are considered equivalent by this routine. Note that * this routine has the same return sense as strcmp (which is different * from prefix_same). */ int prefix_cmp (const struct prefix *p1, const struct prefix *p2) { int offset; int shift; /* Set both prefix's head pointer. */ const u_char *pp1 = (const u_char *)&p1->u.prefix; const u_char *pp2 = (const u_char *)&p2->u.prefix; if (p1->family != p2->family || p1->prefixlen != p2->prefixlen) return 1; offset = p1->prefixlen / PNBBY; shift = p1->prefixlen % PNBBY; if (shift) if (maskbit[shift] & (pp1[offset] ^ pp2[offset])) return 1; while (offset--) if (pp1[offset] != pp2[offset]) return 1; return 0; } /* * Count the number of common bits in 2 prefixes. The prefix length is * ignored for this function; the whole prefix is compared. If the prefix * address families don't match, return -1; otherwise the return value is * in range 0 ... maximum prefix length for the address family. */ int prefix_common_bits (const struct prefix *p1, const struct prefix *p2) { int pos, bit; int length = 0; u_char xor; /* Set both prefix's head pointer. */ const u_char *pp1 = (const u_char *)&p1->u.prefix; const u_char *pp2 = (const u_char *)&p2->u.prefix; if (p1->family == AF_INET) length = IPV4_MAX_BYTELEN; #ifdef HAVE_IPV6 if (p1->family == AF_INET6) length = IPV6_MAX_BYTELEN; #endif if (p1->family != p2->family || !length) return -1; for (pos = 0; pos < length; pos++) if (pp1[pos] != pp2[pos]) break; if (pos == length) return pos * 8; xor = pp1[pos] ^ pp2[pos]; for (bit = 0; bit < 8; bit++) if (xor & (1 << (7 - bit))) break; return pos * 8 + bit; } /* Return prefix family type string. */ const char * prefix_family_str (const struct prefix *p) { if (p->family == AF_INET) return "inet"; #ifdef HAVE_IPV6 if (p->family == AF_INET6) return "inet6"; #endif /* HAVE_IPV6 */ return "unspec"; } /* Allocate new prefix_ipv4 structure. */ struct prefix_ipv4 * prefix_ipv4_new () { struct prefix_ipv4 *p; /* Call prefix_new to allocate a full-size struct prefix to avoid problems where the struct prefix_ipv4 is cast to struct prefix and unallocated bytes were being referenced (e.g. in structure assignments). */ p = (struct prefix_ipv4 *)prefix_new(); p->family = AF_INET; return p; } /* Free prefix_ipv4 structure. */ void prefix_ipv4_free (struct prefix_ipv4 *p) { prefix_free((struct prefix *)p); } /* When string format is invalid return 0. */ int str2prefix_ipv4 (const char *str, struct prefix_ipv4 *p) { int ret; int plen; char *pnt; char *cp; /* Find slash inside string. */ pnt = strchr (str, '/'); /* String doesn't contail slash. */ if (pnt == NULL) { /* Convert string to prefix. */ ret = inet_aton (str, &p->prefix); if (ret == 0) return 0; /* If address doesn't contain slash we assume it host address. */ p->family = AF_INET; p->prefixlen = IPV4_MAX_BITLEN; return ret; } else { cp = XMALLOC (MTYPE_TMP, (pnt - str) + 1); strncpy (cp, str, pnt - str); *(cp + (pnt - str)) = '\0'; ret = inet_aton (cp, &p->prefix); XFREE (MTYPE_TMP, cp); /* Get prefix length. */ plen = (u_char) atoi (++pnt); if (plen > IPV4_MAX_PREFIXLEN) return 0; p->family = AF_INET; p->prefixlen = plen; } return ret; } /* Convert masklen into IP address's netmask (network byte order). */ void masklen2ip (const int masklen, struct in_addr *netmask) { assert (masklen >= 0 && masklen <= IPV4_MAX_BITLEN); /* left shift is only defined for less than the size of the type. * we unconditionally use long long in case the target platform * has defined behaviour for << 32 (or has a 64-bit left shift) */ if (sizeof(unsigned long long) > 4) netmask->s_addr = htonl(0xffffffffULL << (32 - masklen)); else netmask->s_addr = htonl(masklen ? 0xffffffffU << (32 - masklen) : 0); } /* Convert IP address's netmask into integer. We assume netmask is sequential one. Argument netmask should be network byte order. */ u_char ip_masklen (struct in_addr netmask) { uint32_t tmp = ~ntohl(netmask.s_addr); if (tmp) /* clz: count leading zeroes. sadly, the behaviour of this builtin * is undefined for a 0 argument, even though most CPUs give 32 */ return __builtin_clz(tmp); else return 32; } /* Apply mask to IPv4 prefix (network byte order). */ void apply_mask_ipv4 (struct prefix_ipv4 *p) { struct in_addr mask; masklen2ip(p->prefixlen, &mask); p->prefix.s_addr &= mask.s_addr; } /* If prefix is 0.0.0.0/0 then return 1 else return 0. */ int prefix_ipv4_any (const struct prefix_ipv4 *p) { return (p->prefix.s_addr == 0 && p->prefixlen == 0); } #ifdef HAVE_IPV6 /* Allocate a new ip version 6 route */ struct prefix_ipv6 * prefix_ipv6_new (void) { struct prefix_ipv6 *p; /* Allocate a full-size struct prefix to avoid problems with structure size mismatches. */ p = (struct prefix_ipv6 *)prefix_new(); p->family = AF_INET6; return p; } /* Free prefix for IPv6. */ void prefix_ipv6_free (struct prefix_ipv6 *p) { prefix_free((struct prefix *)p); } /* If given string is valid return pin6 else return NULL */ int str2prefix_ipv6 (const char *str, struct prefix_ipv6 *p) { char *pnt; char *cp; int ret; pnt = strchr (str, '/'); /* If string doesn't contain `/' treat it as host route. */ if (pnt == NULL) { ret = inet_pton (AF_INET6, str, &p->prefix); if (ret == 0) return 0; p->prefixlen = IPV6_MAX_BITLEN; } else { int plen; cp = XMALLOC (0, (pnt - str) + 1); strncpy (cp, str, pnt - str); *(cp + (pnt - str)) = '\0'; ret = inet_pton (AF_INET6, cp, &p->prefix); free (cp); if (ret == 0) return 0; plen = (u_char) atoi (++pnt); if (plen > IPV6_MAX_BITLEN) return 0; p->prefixlen = plen; } p->family = AF_INET6; return ret; } /* Convert struct in6_addr netmask into integer. * FIXME return u_char as ip_maskleni() does. */ int ip6_masklen (struct in6_addr netmask) { int len = 0; unsigned char val; unsigned char *pnt; pnt = (unsigned char *) & netmask; while ((*pnt == 0xff) && len < IPV6_MAX_BITLEN) { len += 8; pnt++; } if (len < IPV6_MAX_BITLEN) { val = *pnt; while (val) { len++; val <<= 1; } } return len; } void masklen2ip6 (const int masklen, struct in6_addr *netmask) { assert (masklen >= 0 && masklen <= IPV6_MAX_BITLEN); memcpy (netmask, maskbytes6 + masklen, sizeof (struct in6_addr)); } void apply_mask_ipv6 (struct prefix_ipv6 *p) { u_char *pnt; int index; int offset; index = p->prefixlen / 8; if (index < 16) { pnt = (u_char *) &p->prefix; offset = p->prefixlen % 8; pnt[index] &= maskbit[offset]; index++; while (index < 16) pnt[index++] = 0; } } void str2in6_addr (const char *str, struct in6_addr *addr) { int i; unsigned int x; /* %x must point to unsinged int */ for (i = 0; i < 16; i++) { sscanf (str + (i * 2), "%02x", &x); addr->s6_addr[i] = x & 0xff; } } #endif /* HAVE_IPV6 */ void apply_mask (struct prefix *p) { switch (p->family) { case AF_INET: apply_mask_ipv4 ((struct prefix_ipv4 *)p); break; #ifdef HAVE_IPV6 case AF_INET6: apply_mask_ipv6 ((struct prefix_ipv6 *)p); break; #endif /* HAVE_IPV6 */ default: break; } return; } /* Utility function of convert between struct prefix <=> union sockunion. * FIXME This function isn't used anywhere. */ struct prefix * sockunion2prefix (const union sockunion *dest, const union sockunion *mask) { if (dest->sa.sa_family == AF_INET) { struct prefix_ipv4 *p; p = prefix_ipv4_new (); p->family = AF_INET; p->prefix = dest->sin.sin_addr; p->prefixlen = ip_masklen (mask->sin.sin_addr); return (struct prefix *) p; } #ifdef HAVE_IPV6 if (dest->sa.sa_family == AF_INET6) { struct prefix_ipv6 *p; p = prefix_ipv6_new (); p->family = AF_INET6; p->prefixlen = ip6_masklen (mask->sin6.sin6_addr); memcpy (&p->prefix, &dest->sin6.sin6_addr, sizeof (struct in6_addr)); return (struct prefix *) p; } #endif /* HAVE_IPV6 */ return NULL; } /* Utility function of convert between struct prefix <=> union sockunion. */ struct prefix * sockunion2hostprefix (const union sockunion *su, struct prefix *prefix) { if (su->sa.sa_family == AF_INET) { struct prefix_ipv4 *p; p = prefix ? (struct prefix_ipv4 *) prefix : prefix_ipv4_new (); p->family = AF_INET; p->prefix = su->sin.sin_addr; p->prefixlen = IPV4_MAX_BITLEN; return (struct prefix *) p; } #ifdef HAVE_IPV6 if (su->sa.sa_family == AF_INET6) { struct prefix_ipv6 *p; p = prefix ? (struct prefix_ipv6 *) prefix : prefix_ipv6_new (); p->family = AF_INET6; p->prefixlen = IPV6_MAX_BITLEN; memcpy (&p->prefix, &su->sin6.sin6_addr, sizeof (struct in6_addr)); return (struct prefix *) p; } #endif /* HAVE_IPV6 */ return NULL; } void prefix2sockunion (const struct prefix *p, union sockunion *su) { memset (su, 0, sizeof (*su)); su->sa.sa_family = p->family; if (p->family == AF_INET) su->sin.sin_addr = p->u.prefix4; #ifdef HAVE_IPV6 if (p->family == AF_INET6) memcpy (&su->sin6.sin6_addr, &p->u.prefix6, sizeof (struct in6_addr)); #endif /* HAVE_IPV6 */ } int prefix_blen (const struct prefix *p) { switch (p->family) { case AF_INET: return IPV4_MAX_BYTELEN; break; #ifdef HAVE_IPV6 case AF_INET6: return IPV6_MAX_BYTELEN; break; #endif /* HAVE_IPV6 */ } return 0; } /* Generic function for conversion string to struct prefix. */ int str2prefix (const char *str, struct prefix *p) { int ret; /* First we try to convert string to struct prefix_ipv4. */ ret = str2prefix_ipv4 (str, (struct prefix_ipv4 *) p); if (ret) return ret; #ifdef HAVE_IPV6 /* Next we try to convert string to struct prefix_ipv6. */ ret = str2prefix_ipv6 (str, (struct prefix_ipv6 *) p); if (ret) return ret; #endif /* HAVE_IPV6 */ return 0; } const char * prefix2str (union prefix46constptr pu, char *str, int size) { const struct prefix *p = pu.p; char buf[BUFSIZ]; inet_ntop (p->family, &p->u.prefix, buf, BUFSIZ); snprintf (str, size, "%s/%d", buf, p->prefixlen); return str; } struct prefix * prefix_new () { struct prefix *p; p = XCALLOC (MTYPE_PREFIX, sizeof *p); return p; } /* Free prefix structure. */ void prefix_free (struct prefix *p) { XFREE (MTYPE_PREFIX, p); } /* Utility function. Check the string only contains digit * character. * FIXME str.[c|h] would be better place for this function. */ int all_digit (const char *str) { for (; *str != '\0'; str++) if (!isdigit ((int) *str)) return 0; return 1; } /* Utility function to convert ipv4 prefixes to Classful prefixes */ void apply_classful_mask_ipv4 (struct prefix_ipv4 *p) { u_int32_t destination; destination = ntohl (p->prefix.s_addr); if (p->prefixlen == IPV4_MAX_PREFIXLEN); /* do nothing for host routes */ else if (IN_CLASSC (destination)) { p->prefixlen=24; apply_mask_ipv4(p); } else if (IN_CLASSB(destination)) { p->prefixlen=16; apply_mask_ipv4(p); } else { p->prefixlen=8; apply_mask_ipv4(p); } } in_addr_t ipv4_network_addr (in_addr_t hostaddr, int masklen) { struct in_addr mask; masklen2ip (masklen, &mask); return hostaddr & mask.s_addr; } in_addr_t ipv4_broadcast_addr (in_addr_t hostaddr, int masklen) { struct in_addr mask; masklen2ip (masklen, &mask); return (masklen != IPV4_MAX_PREFIXLEN-1) ? /* normal case */ (hostaddr | ~mask.s_addr) : /* special case for /31 */ (hostaddr ^ ~mask.s_addr); } /* Utility function to convert ipv4 netmask to prefixes ex.) "1.1.0.0" "255.255.0.0" => "1.1.0.0/16" ex.) "1.0.0.0" NULL => "1.0.0.0/8" */ int netmask_str2prefix_str (const char *net_str, const char *mask_str, char *prefix_str) { struct in_addr network; struct in_addr mask; u_char prefixlen; u_int32_t destination; int ret; ret = inet_aton (net_str, &network); if (! ret) return 0; if (mask_str) { ret = inet_aton (mask_str, &mask); if (! ret) return 0; prefixlen = ip_masklen (mask); } else { destination = ntohl (network.s_addr); if (network.s_addr == 0) prefixlen = 0; else if (IN_CLASSC (destination)) prefixlen = 24; else if (IN_CLASSB (destination)) prefixlen = 16; else if (IN_CLASSA (destination)) prefixlen = 8; else return 0; } sprintf (prefix_str, "%s/%d", net_str, prefixlen); return 1; } #ifdef HAVE_IPV6 /* Utility function for making IPv6 address string. */ const char * inet6_ntoa (struct in6_addr addr) { static char buf[INET6_ADDRSTRLEN]; inet_ntop (AF_INET6, &addr, buf, INET6_ADDRSTRLEN); return buf; } #endif /* HAVE_IPV6 */