]>
git.proxmox.com Git - mirror_frr.git/blob - lib/prefix.c
2 * Prefix related functions.
3 * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
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
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.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "sockunion.h"
31 DEFINE_MTYPE_STATIC(LIB
, PREFIX
, "Prefix")
34 static const uint8_t maskbit
[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
35 0xf8, 0xfc, 0xfe, 0xff};
37 static const struct in6_addr maskbytes6
[] = {
38 /* /0 */ {{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
39 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
41 {{{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
42 0x00, 0x00, 0x00, 0x00, 0x00}}},
44 {{{0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
45 0x00, 0x00, 0x00, 0x00, 0x00}}},
47 {{{0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 0x00, 0x00, 0x00, 0x00, 0x00}}},
50 {{{0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00}}},
53 {{{0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 0x00, 0x00, 0x00, 0x00, 0x00}}},
56 {{{0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 0x00, 0x00, 0x00, 0x00, 0x00}}},
59 {{{0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
60 0x00, 0x00, 0x00, 0x00, 0x00}}},
62 {{{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63 0x00, 0x00, 0x00, 0x00, 0x00}}},
65 {{{0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
66 0x00, 0x00, 0x00, 0x00, 0x00}}},
68 {{{0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
69 0x00, 0x00, 0x00, 0x00, 0x00}}},
71 {{{0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
72 0x00, 0x00, 0x00, 0x00, 0x00}}},
74 {{{0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75 0x00, 0x00, 0x00, 0x00, 0x00}}},
77 {{{0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0x00}}},
80 {{{0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0x00}}},
83 {{{0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00}}},
86 {{{0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0x00}}},
89 {{{0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x00, 0x00}}},
92 {{{0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
93 0x00, 0x00, 0x00, 0x00, 0x00}}},
95 {{{0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
96 0x00, 0x00, 0x00, 0x00, 0x00}}},
98 {{{0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
99 0x00, 0x00, 0x00, 0x00, 0x00}}},
101 {{{0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
102 0x00, 0x00, 0x00, 0x00, 0x00}}},
104 {{{0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
105 0x00, 0x00, 0x00, 0x00, 0x00}}},
107 {{{0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
108 0x00, 0x00, 0x00, 0x00, 0x00}}},
110 {{{0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
111 0x00, 0x00, 0x00, 0x00, 0x00}}},
113 {{{0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
114 0x00, 0x00, 0x00, 0x00, 0x00}}},
116 {{{0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
117 0x00, 0x00, 0x00, 0x00, 0x00}}},
119 {{{0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
120 0x00, 0x00, 0x00, 0x00, 0x00}}},
122 {{{0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
123 0x00, 0x00, 0x00, 0x00, 0x00}}},
125 {{{0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
126 0x00, 0x00, 0x00, 0x00, 0x00}}},
128 {{{0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
129 0x00, 0x00, 0x00, 0x00, 0x00}}},
131 {{{0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
132 0x00, 0x00, 0x00, 0x00, 0x00}}},
134 {{{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
135 0x00, 0x00, 0x00, 0x00, 0x00}}},
137 {{{0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
138 0x00, 0x00, 0x00, 0x00, 0x00}}},
140 {{{0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
141 0x00, 0x00, 0x00, 0x00, 0x00}}},
143 {{{0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
144 0x00, 0x00, 0x00, 0x00, 0x00}}},
146 {{{0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
147 0x00, 0x00, 0x00, 0x00, 0x00}}},
149 {{{0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
150 0x00, 0x00, 0x00, 0x00, 0x00}}},
152 {{{0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
153 0x00, 0x00, 0x00, 0x00, 0x00}}},
155 {{{0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
156 0x00, 0x00, 0x00, 0x00, 0x00}}},
158 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
159 0x00, 0x00, 0x00, 0x00, 0x00}}},
161 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
162 0x00, 0x00, 0x00, 0x00, 0x00}}},
164 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
165 0x00, 0x00, 0x00, 0x00, 0x00}}},
167 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
168 0x00, 0x00, 0x00, 0x00, 0x00}}},
170 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00,
171 0x00, 0x00, 0x00, 0x00, 0x00}}},
173 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00,
174 0x00, 0x00, 0x00, 0x00, 0x00}}},
176 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00,
177 0x00, 0x00, 0x00, 0x00, 0x00}}},
179 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
180 0x00, 0x00, 0x00, 0x00, 0x00}}},
182 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
183 0x00, 0x00, 0x00, 0x00, 0x00}}},
185 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00,
186 0x00, 0x00, 0x00, 0x00, 0x00}}},
188 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00,
189 0x00, 0x00, 0x00, 0x00, 0x00}}},
191 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00,
192 0x00, 0x00, 0x00, 0x00, 0x00}}},
194 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00,
195 0x00, 0x00, 0x00, 0x00, 0x00}}},
197 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00,
198 0x00, 0x00, 0x00, 0x00, 0x00}}},
200 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00,
201 0x00, 0x00, 0x00, 0x00, 0x00}}},
203 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00,
204 0x00, 0x00, 0x00, 0x00, 0x00}}},
206 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
207 0x00, 0x00, 0x00, 0x00, 0x00}}},
209 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00,
210 0x00, 0x00, 0x00, 0x00, 0x00}}},
212 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00,
213 0x00, 0x00, 0x00, 0x00, 0x00}}},
215 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00,
216 0x00, 0x00, 0x00, 0x00, 0x00}}},
218 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00,
219 0x00, 0x00, 0x00, 0x00, 0x00}}},
221 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00,
222 0x00, 0x00, 0x00, 0x00, 0x00}}},
224 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00,
225 0x00, 0x00, 0x00, 0x00, 0x00}}},
227 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00,
228 0x00, 0x00, 0x00, 0x00, 0x00}}},
230 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00,
231 0x00, 0x00, 0x00, 0x00, 0x00}}},
233 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00,
234 0x00, 0x00, 0x00, 0x00, 0x00}}},
236 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00,
237 0x00, 0x00, 0x00, 0x00, 0x00}}},
239 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00,
240 0x00, 0x00, 0x00, 0x00, 0x00}}},
242 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00,
243 0x00, 0x00, 0x00, 0x00, 0x00}}},
245 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00,
246 0x00, 0x00, 0x00, 0x00, 0x00}}},
248 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00,
249 0x00, 0x00, 0x00, 0x00, 0x00}}},
251 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00,
252 0x00, 0x00, 0x00, 0x00, 0x00}}},
254 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
255 0x00, 0x00, 0x00, 0x00, 0x00}}},
257 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00,
258 0x00, 0x00, 0x00, 0x00, 0x00}}},
260 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00,
261 0x00, 0x00, 0x00, 0x00, 0x00}}},
263 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00,
264 0x00, 0x00, 0x00, 0x00, 0x00}}},
266 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00,
267 0x00, 0x00, 0x00, 0x00, 0x00}}},
269 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00,
270 0x00, 0x00, 0x00, 0x00, 0x00}}},
272 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00,
273 0x00, 0x00, 0x00, 0x00, 0x00}}},
275 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00,
276 0x00, 0x00, 0x00, 0x00, 0x00}}},
278 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
279 0x00, 0x00, 0x00, 0x00, 0x00}}},
281 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80,
282 0x00, 0x00, 0x00, 0x00, 0x00}}},
284 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0,
285 0x00, 0x00, 0x00, 0x00, 0x00}}},
287 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0,
288 0x00, 0x00, 0x00, 0x00, 0x00}}},
290 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
291 0x00, 0x00, 0x00, 0x00, 0x00}}},
293 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8,
294 0x00, 0x00, 0x00, 0x00, 0x00}}},
296 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc,
297 0x00, 0x00, 0x00, 0x00, 0x00}}},
299 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
300 0x00, 0x00, 0x00, 0x00, 0x00}}},
302 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
303 0x00, 0x00, 0x00, 0x00, 0x00}}},
305 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
306 0x80, 0x00, 0x00, 0x00, 0x00}}},
308 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
309 0xc0, 0x00, 0x00, 0x00, 0x00}}},
311 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
312 0xe0, 0x00, 0x00, 0x00, 0x00}}},
314 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
315 0xf0, 0x00, 0x00, 0x00, 0x00}}},
317 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
318 0xf8, 0x00, 0x00, 0x00, 0x00}}},
320 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
321 0xfc, 0x00, 0x00, 0x00, 0x00}}},
323 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
324 0xfe, 0x00, 0x00, 0x00, 0x00}}},
326 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
327 0xff, 0x00, 0x00, 0x00, 0x00}}},
329 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
330 0xff, 0x80, 0x00, 0x00, 0x00}}},
332 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
333 0xff, 0xc0, 0x00, 0x00, 0x00}}},
335 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
336 0xff, 0xe0, 0x00, 0x00, 0x00}}},
338 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
339 0xff, 0xf0, 0x00, 0x00, 0x00}}},
341 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
342 0xff, 0xf8, 0x00, 0x00, 0x00}}},
344 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
345 0xff, 0xfc, 0x00, 0x00, 0x00}}},
347 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
348 0xff, 0xfe, 0x00, 0x00, 0x00}}},
350 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
351 0xff, 0xff, 0x00, 0x00, 0x00}}},
353 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
354 0xff, 0xff, 0x80, 0x00, 0x00}}},
356 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
357 0xff, 0xff, 0xc0, 0x00, 0x00}}},
359 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
360 0xff, 0xff, 0xe0, 0x00, 0x00}}},
362 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
363 0xff, 0xff, 0xf0, 0x00, 0x00}}},
365 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
366 0xff, 0xff, 0xf8, 0x00, 0x00}}},
368 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
369 0xff, 0xff, 0xfc, 0x00, 0x00}}},
371 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
372 0xff, 0xff, 0xfe, 0x00, 0x00}}},
374 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
375 0xff, 0xff, 0xff, 0x00, 0x00}}},
377 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
378 0xff, 0xff, 0xff, 0x80, 0x00}}},
380 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
381 0xff, 0xff, 0xff, 0xc0, 0x00}}},
383 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
384 0xff, 0xff, 0xff, 0xe0, 0x00}}},
386 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0xf0, 0x00}}},
389 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
390 0xff, 0xff, 0xff, 0xf8, 0x00}}},
392 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
393 0xff, 0xff, 0xff, 0xfc, 0x00}}},
395 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
396 0xff, 0xff, 0xff, 0xfe, 0x00}}},
398 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
399 0xff, 0xff, 0xff, 0xff, 0x00}}},
401 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
402 0xff, 0xff, 0xff, 0xff, 0x80}}},
404 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
405 0xff, 0xff, 0xff, 0xff, 0xc0}}},
407 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0xff, 0xe0}}},
410 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
411 0xff, 0xff, 0xff, 0xff, 0xf0}}},
413 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
414 0xff, 0xff, 0xff, 0xff, 0xf8}}},
416 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
417 0xff, 0xff, 0xff, 0xff, 0xfc}}},
419 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
420 0xff, 0xff, 0xff, 0xff, 0xfe}}},
422 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
423 0xff, 0xff, 0xff, 0xff, 0xff}}}};
425 /* Number of bits in prefix type. */
430 #define MASKBIT(offset) ((0xff << (PNBBY - (offset))) & 0xff)
432 void prefix_hexdump(const struct prefix
*p
)
434 char buf
[PREFIX_STRLEN
];
436 zlog_debug("prefix: %s",
437 prefix2str(p
, buf
, sizeof(buf
)));
438 zlog_hexdump(p
, sizeof(struct prefix
));
441 int is_zero_mac(struct ethaddr
*mac
)
445 for (i
= 0; i
< ETH_ALEN
; i
++) {
453 unsigned int prefix_bit(const uint8_t *prefix
, const uint8_t prefixlen
)
455 unsigned int offset
= prefixlen
/ 8;
456 unsigned int shift
= 7 - (prefixlen
% 8);
458 return (prefix
[offset
] >> shift
) & 1;
461 unsigned int prefix6_bit(const struct in6_addr
*prefix
, const uint8_t prefixlen
)
463 return prefix_bit((const uint8_t *)&prefix
->s6_addr
, prefixlen
);
466 int str2family(const char *string
)
468 if (!strcmp("ipv4", string
))
470 else if (!strcmp("ipv6", string
))
472 else if (!strcmp("ethernet", string
))
474 else if (!strcmp("evpn", string
))
479 const char *family2str(int family
)
494 /* Address Famiy Identifier to Address Family converter. */
495 int afi2family(afi_t afi
)
499 else if (afi
== AFI_IP6
)
501 else if (afi
== AFI_L2VPN
)
503 /* NOTE: EVPN code should NOT use this interface. */
507 afi_t
family2afi(int family
)
509 if (family
== AF_INET
)
511 else if (family
== AF_INET6
)
513 else if (family
== AF_ETHERNET
|| family
== AF_EVPN
)
518 const char *afi2str(afi_t afi
)
535 const char *safi2str(safi_t safi
)
548 case SAFI_LABELED_UNICAST
:
549 return "labeled-unicast";
557 /* If n includes p prefix then return 1 else return 0. */
558 int prefix_match(const struct prefix
*n
, const struct prefix
*p
)
562 const uint8_t *np
, *pp
;
564 /* If n's prefix is longer than p's one return 0. */
565 if (n
->prefixlen
> p
->prefixlen
)
568 if (n
->family
== AF_FLOWSPEC
) {
569 /* prefixlen is unused. look at fs prefix len */
570 if (n
->u
.prefix_flowspec
.prefixlen
>
571 p
->u
.prefix_flowspec
.prefixlen
)
574 /* Set both prefix's head pointer. */
575 np
= (const uint8_t *)&n
->u
.prefix_flowspec
.ptr
;
576 pp
= (const uint8_t *)&p
->u
.prefix_flowspec
.ptr
;
578 offset
= n
->u
.prefix_flowspec
.prefixlen
;
581 if (np
[offset
] != pp
[offset
])
586 /* Set both prefix's head pointer. */
587 np
= (const uint8_t *)&n
->u
.prefix
;
588 pp
= (const uint8_t *)&p
->u
.prefix
;
590 offset
= n
->prefixlen
/ PNBBY
;
591 shift
= n
->prefixlen
% PNBBY
;
594 if (maskbit
[shift
] & (np
[offset
] ^ pp
[offset
]))
598 if (np
[offset
] != pp
[offset
])
603 /* If n includes p then return 1 else return 0. Prefix mask is not considered */
604 int prefix_match_network_statement(const struct prefix
*n
,
605 const struct prefix
*p
)
609 const uint8_t *np
, *pp
;
611 /* Set both prefix's head pointer. */
612 np
= (const uint8_t *)&n
->u
.prefix
;
613 pp
= (const uint8_t *)&p
->u
.prefix
;
615 offset
= n
->prefixlen
/ PNBBY
;
616 shift
= n
->prefixlen
% PNBBY
;
619 if (maskbit
[shift
] & (np
[offset
] ^ pp
[offset
]))
623 if (np
[offset
] != pp
[offset
])
628 void prefix_copy(struct prefix
*dest
, const struct prefix
*src
)
630 dest
->family
= src
->family
;
631 dest
->prefixlen
= src
->prefixlen
;
633 if (src
->family
== AF_INET
)
634 dest
->u
.prefix4
= src
->u
.prefix4
;
635 else if (src
->family
== AF_INET6
)
636 dest
->u
.prefix6
= src
->u
.prefix6
;
637 else if (src
->family
== AF_ETHERNET
) {
638 memcpy(&dest
->u
.prefix_eth
, &src
->u
.prefix_eth
,
639 sizeof(struct ethaddr
));
640 } else if (src
->family
== AF_EVPN
) {
641 memcpy(&dest
->u
.prefix_evpn
, &src
->u
.prefix_evpn
,
642 sizeof(struct evpn_addr
));
643 } else if (src
->family
== AF_UNSPEC
) {
644 dest
->u
.lp
.id
= src
->u
.lp
.id
;
645 dest
->u
.lp
.adv_router
= src
->u
.lp
.adv_router
;
646 } else if (src
->family
== AF_FLOWSPEC
) {
650 len
= src
->u
.prefix_flowspec
.prefixlen
;
651 dest
->u
.prefix_flowspec
.prefixlen
=
652 src
->u
.prefix_flowspec
.prefixlen
;
653 dest
->family
= src
->family
;
654 temp
= XCALLOC(MTYPE_PREFIX_FLOWSPEC
, len
);
655 dest
->u
.prefix_flowspec
.ptr
= (uintptr_t)temp
;
656 memcpy((void *)dest
->u
.prefix_flowspec
.ptr
,
657 (void *)src
->u
.prefix_flowspec
.ptr
, len
);
659 zlog_err("prefix_copy(): Unknown address family %d",
666 * Return 1 if the address/netmask contained in the prefix structure
667 * is the same, and else return 0. For this routine, 'same' requires
668 * that not only the prefix length and the network part be the same,
669 * but also the host part. Thus, 10.0.0.1/8 and 10.0.0.2/8 are not
670 * the same. Note that this routine has the same return value sense
671 * as '==' (which is different from prefix_cmp).
673 int prefix_same(const struct prefix
*p1
, const struct prefix
*p2
)
675 if ((p1
&& !p2
) || (!p1
&& p2
))
681 if (p1
->family
== p2
->family
&& p1
->prefixlen
== p2
->prefixlen
) {
682 if (p1
->family
== AF_INET
)
683 if (IPV4_ADDR_SAME(&p1
->u
.prefix4
, &p2
->u
.prefix4
))
685 if (p1
->family
== AF_INET6
)
686 if (IPV6_ADDR_SAME(&p1
->u
.prefix6
.s6_addr
,
687 &p2
->u
.prefix6
.s6_addr
))
689 if (p1
->family
== AF_ETHERNET
)
690 if (!memcmp(&p1
->u
.prefix_eth
, &p2
->u
.prefix_eth
,
691 sizeof(struct ethaddr
)))
693 if (p1
->family
== AF_EVPN
)
694 if (!memcmp(&p1
->u
.prefix_evpn
, &p2
->u
.prefix_evpn
,
695 sizeof(struct evpn_addr
)))
697 if (p1
->family
== AF_FLOWSPEC
) {
698 if (p1
->u
.prefix_flowspec
.prefixlen
!=
699 p2
->u
.prefix_flowspec
.prefixlen
)
701 if (!memcmp(&p1
->u
.prefix_flowspec
.ptr
,
702 &p2
->u
.prefix_flowspec
.ptr
,
703 p2
->u
.prefix_flowspec
.prefixlen
))
711 * Return 0 if the network prefixes represented by the struct prefix
712 * arguments are the same prefix, and 1 otherwise. Network prefixes
713 * are considered the same if the prefix lengths are equal and the
714 * network parts are the same. Host bits (which are considered masked
715 * by the prefix length) are not significant. Thus, 10.0.0.1/8 and
716 * 10.0.0.2/8 are considered equivalent by this routine. Note that
717 * this routine has the same return sense as strcmp (which is different
720 int prefix_cmp(const struct prefix
*p1
, const struct prefix
*p2
)
725 /* Set both prefix's head pointer. */
729 if (p1
->family
!= p2
->family
)
731 if (p1
->family
== AF_FLOWSPEC
) {
732 pp1
= (const uint8_t *)p1
->u
.prefix_flowspec
.ptr
;
733 pp2
= (const uint8_t *)p2
->u
.prefix_flowspec
.ptr
;
735 if (p1
->u
.prefix_flowspec
.prefixlen
!=
736 p2
->u
.prefix_flowspec
.prefixlen
)
739 offset
= p1
->u
.prefix_flowspec
.prefixlen
;
741 if (pp1
[offset
] != pp2
[offset
])
745 pp1
= (const uint8_t *)&p1
->u
.prefix
;
746 pp2
= (const uint8_t *)&p2
->u
.prefix
;
748 if (p1
->prefixlen
!= p2
->prefixlen
)
750 offset
= p1
->prefixlen
/ PNBBY
;
751 shift
= p1
->prefixlen
% PNBBY
;
754 if (maskbit
[shift
] & (pp1
[offset
] ^ pp2
[offset
]))
758 if (pp1
[offset
] != pp2
[offset
])
765 * Count the number of common bits in 2 prefixes. The prefix length is
766 * ignored for this function; the whole prefix is compared. If the prefix
767 * address families don't match, return -1; otherwise the return value is
768 * in range 0 ... maximum prefix length for the address family.
770 int prefix_common_bits(const struct prefix
*p1
, const struct prefix
*p2
)
776 /* Set both prefix's head pointer. */
777 const uint8_t *pp1
= (const uint8_t *)&p1
->u
.prefix
;
778 const uint8_t *pp2
= (const uint8_t *)&p2
->u
.prefix
;
780 if (p1
->family
== AF_INET
)
781 length
= IPV4_MAX_BYTELEN
;
782 if (p1
->family
== AF_INET6
)
783 length
= IPV6_MAX_BYTELEN
;
784 if (p1
->family
== AF_ETHERNET
)
786 if (p1
->family
== AF_EVPN
)
787 length
= 8 * sizeof(struct evpn_addr
);
789 if (p1
->family
!= p2
->family
|| !length
)
792 for (pos
= 0; pos
< length
; pos
++)
793 if (pp1
[pos
] != pp2
[pos
])
798 xor = pp1
[pos
] ^ pp2
[pos
];
799 for (bit
= 0; bit
< 8; bit
++)
800 if (xor&(1 << (7 - bit
)))
803 return pos
* 8 + bit
;
806 /* Return prefix family type string. */
807 const char *prefix_family_str(const struct prefix
*p
)
809 if (p
->family
== AF_INET
)
811 if (p
->family
== AF_INET6
)
813 if (p
->family
== AF_ETHERNET
)
815 if (p
->family
== AF_EVPN
)
820 /* Allocate new prefix_ipv4 structure. */
821 struct prefix_ipv4
*prefix_ipv4_new()
823 struct prefix_ipv4
*p
;
825 /* Call prefix_new to allocate a full-size struct prefix to avoid
827 where the struct prefix_ipv4 is cast to struct prefix and unallocated
828 bytes were being referenced (e.g. in structure assignments). */
829 p
= (struct prefix_ipv4
*)prefix_new();
834 /* Free prefix_ipv4 structure. */
835 void prefix_ipv4_free(struct prefix_ipv4
*p
)
837 prefix_free((struct prefix
*)p
);
840 /* When string format is invalid return 0. */
841 int str2prefix_ipv4(const char *str
, struct prefix_ipv4
*p
)
848 /* Find slash inside string. */
849 pnt
= strchr(str
, '/');
851 /* String doesn't contail slash. */
853 /* Convert string to prefix. */
854 ret
= inet_aton(str
, &p
->prefix
);
858 /* If address doesn't contain slash we assume it host address.
861 p
->prefixlen
= IPV4_MAX_BITLEN
;
865 cp
= XMALLOC(MTYPE_TMP
, (pnt
- str
) + 1);
866 strncpy(cp
, str
, pnt
- str
);
867 *(cp
+ (pnt
- str
)) = '\0';
868 ret
= inet_aton(cp
, &p
->prefix
);
869 XFREE(MTYPE_TMP
, cp
);
871 /* Get prefix length. */
872 plen
= (uint8_t)atoi(++pnt
);
873 if (plen
> IPV4_MAX_PREFIXLEN
)
883 /* When string format is invalid return 0. */
884 int str2prefix_eth(const char *str
, struct prefix_eth
*p
)
890 const char *str_addr
= str
;
895 if (!strcmp(str
, "any")) {
896 memset(p
, 0, sizeof(*p
));
897 p
->family
= AF_ETHERNET
;
901 /* Find slash inside string. */
902 pnt
= strchr(str
, '/');
905 /* Get prefix length. */
906 plen
= (uint8_t)atoi(++pnt
);
912 cp
= XMALLOC(MTYPE_TMP
, (pnt
- str
) + 1);
913 strncpy(cp
, str
, pnt
- str
);
914 *(cp
+ (pnt
- str
)) = '\0';
920 /* Convert string to prefix. */
921 if (sscanf(str_addr
, "%2x:%2x:%2x:%2x:%2x:%2x", a
+ 0, a
+ 1, a
+ 2,
927 for (i
= 0; i
< 6; ++i
) {
928 p
->eth_addr
.octet
[i
] = a
[i
] & 0xff;
931 p
->family
= AF_ETHERNET
;
934 * special case to allow old configurations to work
935 * Since all zero's is implicitly meant to allow
936 * a comparison to zero, let's assume
938 if (!slash
&& is_zero_mac(&(p
->eth_addr
)))
945 XFREE(MTYPE_TMP
, cp
);
950 /* Convert masklen into IP address's netmask (network byte order). */
951 void masklen2ip(const int masklen
, struct in_addr
*netmask
)
953 assert(masklen
>= 0 && masklen
<= IPV4_MAX_BITLEN
);
955 /* left shift is only defined for less than the size of the type.
956 * we unconditionally use long long in case the target platform
957 * has defined behaviour for << 32 (or has a 64-bit left shift) */
959 if (sizeof(unsigned long long) > 4)
960 netmask
->s_addr
= htonl(0xffffffffULL
<< (32 - masklen
));
963 htonl(masklen
? 0xffffffffU
<< (32 - masklen
) : 0);
966 /* Convert IP address's netmask into integer. We assume netmask is
967 sequential one. Argument netmask should be network byte order. */
968 uint8_t ip_masklen(struct in_addr netmask
)
970 uint32_t tmp
= ~ntohl(netmask
.s_addr
);
972 /* clz: count leading zeroes. sadly, the behaviour of this
974 * is undefined for a 0 argument, even though most CPUs give 32
976 return __builtin_clz(tmp
);
981 /* Apply mask to IPv4 prefix (network byte order). */
982 void apply_mask_ipv4(struct prefix_ipv4
*p
)
985 masklen2ip(p
->prefixlen
, &mask
);
986 p
->prefix
.s_addr
&= mask
.s_addr
;
989 /* If prefix is 0.0.0.0/0 then return 1 else return 0. */
990 int prefix_ipv4_any(const struct prefix_ipv4
*p
)
992 return (p
->prefix
.s_addr
== 0 && p
->prefixlen
== 0);
995 /* Allocate a new ip version 6 route */
996 struct prefix_ipv6
*prefix_ipv6_new(void)
998 struct prefix_ipv6
*p
;
1000 /* Allocate a full-size struct prefix to avoid problems with structure
1002 p
= (struct prefix_ipv6
*)prefix_new();
1003 p
->family
= AF_INET6
;
1007 /* Free prefix for IPv6. */
1008 void prefix_ipv6_free(struct prefix_ipv6
*p
)
1010 prefix_free((struct prefix
*)p
);
1013 /* If given string is valid return pin6 else return NULL */
1014 int str2prefix_ipv6(const char *str
, struct prefix_ipv6
*p
)
1020 pnt
= strchr(str
, '/');
1022 /* If string doesn't contain `/' treat it as host route. */
1024 ret
= inet_pton(AF_INET6
, str
, &p
->prefix
);
1027 p
->prefixlen
= IPV6_MAX_BITLEN
;
1031 cp
= XMALLOC(MTYPE_TMP
, (pnt
- str
) + 1);
1032 strncpy(cp
, str
, pnt
- str
);
1033 *(cp
+ (pnt
- str
)) = '\0';
1034 ret
= inet_pton(AF_INET6
, cp
, &p
->prefix
);
1035 XFREE(MTYPE_TMP
, cp
);
1038 plen
= (uint8_t)atoi(++pnt
);
1039 if (plen
> IPV6_MAX_BITLEN
)
1041 p
->prefixlen
= plen
;
1043 p
->family
= AF_INET6
;
1048 /* Convert struct in6_addr netmask into integer.
1049 * FIXME return uint8_t as ip_maskleni() does. */
1050 int ip6_masklen(struct in6_addr netmask
)
1056 pnt
= (unsigned char *)&netmask
;
1058 while ((*pnt
== 0xff) && len
< IPV6_MAX_BITLEN
) {
1063 if (len
< IPV6_MAX_BITLEN
) {
1073 void masklen2ip6(const int masklen
, struct in6_addr
*netmask
)
1075 assert(masklen
>= 0 && masklen
<= IPV6_MAX_BITLEN
);
1076 memcpy(netmask
, maskbytes6
+ masklen
, sizeof(struct in6_addr
));
1079 void apply_mask_ipv6(struct prefix_ipv6
*p
)
1085 index
= p
->prefixlen
/ 8;
1088 pnt
= (uint8_t *)&p
->prefix
;
1089 offset
= p
->prefixlen
% 8;
1091 pnt
[index
] &= maskbit
[offset
];
1099 void apply_mask(struct prefix
*p
)
1101 switch (p
->family
) {
1103 apply_mask_ipv4((struct prefix_ipv4
*)p
);
1106 apply_mask_ipv6((struct prefix_ipv6
*)p
);
1114 /* Utility function of convert between struct prefix <=> union sockunion.
1115 * FIXME This function isn't used anywhere. */
1116 struct prefix
*sockunion2prefix(const union sockunion
*dest
,
1117 const union sockunion
*mask
)
1119 if (dest
->sa
.sa_family
== AF_INET
) {
1120 struct prefix_ipv4
*p
;
1122 p
= prefix_ipv4_new();
1123 p
->family
= AF_INET
;
1124 p
->prefix
= dest
->sin
.sin_addr
;
1125 p
->prefixlen
= ip_masklen(mask
->sin
.sin_addr
);
1126 return (struct prefix
*)p
;
1128 if (dest
->sa
.sa_family
== AF_INET6
) {
1129 struct prefix_ipv6
*p
;
1131 p
= prefix_ipv6_new();
1132 p
->family
= AF_INET6
;
1133 p
->prefixlen
= ip6_masklen(mask
->sin6
.sin6_addr
);
1134 memcpy(&p
->prefix
, &dest
->sin6
.sin6_addr
,
1135 sizeof(struct in6_addr
));
1136 return (struct prefix
*)p
;
1141 /* Utility function of convert between struct prefix <=> union sockunion. */
1142 struct prefix
*sockunion2hostprefix(const union sockunion
*su
,
1143 struct prefix
*prefix
)
1145 if (su
->sa
.sa_family
== AF_INET
) {
1146 struct prefix_ipv4
*p
;
1148 p
= prefix
? (struct prefix_ipv4
*)prefix
: prefix_ipv4_new();
1149 p
->family
= AF_INET
;
1150 p
->prefix
= su
->sin
.sin_addr
;
1151 p
->prefixlen
= IPV4_MAX_BITLEN
;
1152 return (struct prefix
*)p
;
1154 if (su
->sa
.sa_family
== AF_INET6
) {
1155 struct prefix_ipv6
*p
;
1157 p
= prefix
? (struct prefix_ipv6
*)prefix
: prefix_ipv6_new();
1158 p
->family
= AF_INET6
;
1159 p
->prefixlen
= IPV6_MAX_BITLEN
;
1160 memcpy(&p
->prefix
, &su
->sin6
.sin6_addr
,
1161 sizeof(struct in6_addr
));
1162 return (struct prefix
*)p
;
1167 void prefix2sockunion(const struct prefix
*p
, union sockunion
*su
)
1169 memset(su
, 0, sizeof(*su
));
1171 su
->sa
.sa_family
= p
->family
;
1172 if (p
->family
== AF_INET
)
1173 su
->sin
.sin_addr
= p
->u
.prefix4
;
1174 if (p
->family
== AF_INET6
)
1175 memcpy(&su
->sin6
.sin6_addr
, &p
->u
.prefix6
,
1176 sizeof(struct in6_addr
));
1179 int prefix_blen(const struct prefix
*p
)
1181 switch (p
->family
) {
1183 return IPV4_MAX_BYTELEN
;
1186 return IPV6_MAX_BYTELEN
;
1195 /* Generic function for conversion string to struct prefix. */
1196 int str2prefix(const char *str
, struct prefix
*p
)
1200 /* First we try to convert string to struct prefix_ipv4. */
1201 ret
= str2prefix_ipv4(str
, (struct prefix_ipv4
*)p
);
1205 /* Next we try to convert string to struct prefix_ipv6. */
1206 ret
= str2prefix_ipv6(str
, (struct prefix_ipv6
*)p
);
1210 /* Next we try to convert string to struct prefix_eth. */
1211 ret
= str2prefix_eth(str
, (struct prefix_eth
*)p
);
1218 static const char *prefixevpn_ead2str(const struct prefix_evpn
*p
, char *str
,
1221 snprintf(str
, size
, "Unsupported EVPN prefix");
1225 static const char *prefixevpn_macip2str(const struct prefix_evpn
*p
, char *str
,
1229 char buf
[PREFIX2STR_BUFFER
];
1230 char buf2
[ETHER_ADDR_STRLEN
];
1232 if (is_evpn_prefix_ipaddr_none(p
))
1233 snprintf(str
, size
, "[%d]:[%s]/%d",
1234 p
->prefix
.route_type
,
1235 prefix_mac2str(&p
->prefix
.macip_addr
.mac
,
1236 buf2
, sizeof(buf2
)),
1239 family
= is_evpn_prefix_ipaddr_v4(p
)
1242 snprintf(str
, size
, "[%d]:[%s]:[%s]/%d",
1243 p
->prefix
.route_type
,
1244 prefix_mac2str(&p
->prefix
.macip_addr
.mac
,
1245 buf2
, sizeof(buf2
)),
1247 &p
->prefix
.macip_addr
.ip
.ip
.addr
,
1248 buf
, PREFIX2STR_BUFFER
),
1254 static const char *prefixevpn_imet2str(const struct prefix_evpn
*p
, char *str
,
1258 char buf
[PREFIX2STR_BUFFER
];
1260 family
= is_evpn_prefix_ipaddr_v4(p
)
1263 snprintf(str
, size
, "[%d]:[%s]/%d", p
->prefix
.route_type
,
1265 &p
->prefix
.imet_addr
.ip
.ip
.addr
, buf
,
1271 static const char *prefixevpn_es2str(const struct prefix_evpn
*p
, char *str
,
1274 char buf
[ESI_STR_LEN
];
1276 snprintf(str
, size
, "[%d]:[%s]:[%s]/%d", p
->prefix
.route_type
,
1277 esi_to_str(&p
->prefix
.es_addr
.esi
, buf
, sizeof(buf
)),
1278 inet_ntoa(p
->prefix
.es_addr
.ip
.ipaddr_v4
),
1283 static const char *prefixevpn_prefix2str(const struct prefix_evpn
*p
, char *str
,
1287 char buf
[PREFIX2STR_BUFFER
];
1289 family
= is_evpn_prefix_ipaddr_v4(p
)
1292 snprintf(str
, size
, "[%d]:[%u][%s/%d]/%d",
1293 p
->prefix
.route_type
,
1294 p
->prefix
.prefix_addr
.eth_tag
,
1296 &p
->prefix
.prefix_addr
.ip
.ip
.addr
, buf
,
1298 p
->prefix
.prefix_addr
.ip_prefix_length
,
1303 static const char *prefixevpn2str(const struct prefix_evpn
*p
, char *str
,
1306 switch (p
->prefix
.route_type
) {
1308 return prefixevpn_ead2str(p
, str
, size
);
1310 return prefixevpn_macip2str(p
, str
, size
);
1312 return prefixevpn_imet2str(p
, str
, size
);
1314 return prefixevpn_es2str(p
, str
, size
);
1316 return prefixevpn_prefix2str(p
, str
, size
);
1318 snprintf(str
, size
, "Unsupported EVPN prefix");
1324 const char *prefix2str(union prefixconstptr pu
, char *str
, int size
)
1326 const struct prefix
*p
= pu
.p
;
1327 char buf
[PREFIX2STR_BUFFER
];
1329 switch (p
->family
) {
1332 snprintf(str
, size
, "%s/%d", inet_ntop(p
->family
, &p
->u
.prefix
,
1333 buf
, PREFIX2STR_BUFFER
),
1338 snprintf(str
, size
, "%s/%d",
1339 prefix_mac2str(&p
->u
.prefix_eth
, buf
, sizeof(buf
)),
1344 prefixevpn2str((const struct prefix_evpn
*)p
, str
, size
);
1348 sprintf(str
, "FS prefix");
1352 sprintf(str
, "UNK prefix");
1359 struct prefix
*prefix_new()
1363 p
= XCALLOC(MTYPE_PREFIX
, sizeof *p
);
1367 /* Free prefix structure. */
1368 void prefix_free(struct prefix
*p
)
1370 XFREE(MTYPE_PREFIX
, p
);
1373 /* Utility function. Check the string only contains digit
1375 * FIXME str.[c|h] would be better place for this function. */
1376 int all_digit(const char *str
)
1378 for (; *str
!= '\0'; str
++)
1379 if (!isdigit((int)*str
))
1384 /* Utility function to convert ipv4 prefixes to Classful prefixes */
1385 void apply_classful_mask_ipv4(struct prefix_ipv4
*p
)
1388 uint32_t destination
;
1390 destination
= ntohl(p
->prefix
.s_addr
);
1392 if (p
->prefixlen
== IPV4_MAX_PREFIXLEN
)
1394 /* do nothing for host routes */
1395 else if (IN_CLASSC(destination
)) {
1398 } else if (IN_CLASSB(destination
)) {
1407 in_addr_t
ipv4_network_addr(in_addr_t hostaddr
, int masklen
)
1409 struct in_addr mask
;
1411 masklen2ip(masklen
, &mask
);
1412 return hostaddr
& mask
.s_addr
;
1415 in_addr_t
ipv4_broadcast_addr(in_addr_t hostaddr
, int masklen
)
1417 struct in_addr mask
;
1419 masklen2ip(masklen
, &mask
);
1420 return (masklen
!= IPV4_MAX_PREFIXLEN
- 1) ?
1422 (hostaddr
| ~mask
.s_addr
)
1424 /* special case for /31 */
1425 (hostaddr
^ ~mask
.s_addr
);
1428 /* Utility function to convert ipv4 netmask to prefixes
1429 ex.) "1.1.0.0" "255.255.0.0" => "1.1.0.0/16"
1430 ex.) "1.0.0.0" NULL => "1.0.0.0/8" */
1431 int netmask_str2prefix_str(const char *net_str
, const char *mask_str
,
1434 struct in_addr network
;
1435 struct in_addr mask
;
1437 uint32_t destination
;
1440 ret
= inet_aton(net_str
, &network
);
1445 ret
= inet_aton(mask_str
, &mask
);
1449 prefixlen
= ip_masklen(mask
);
1451 destination
= ntohl(network
.s_addr
);
1453 if (network
.s_addr
== 0)
1455 else if (IN_CLASSC(destination
))
1457 else if (IN_CLASSB(destination
))
1459 else if (IN_CLASSA(destination
))
1465 sprintf(prefix_str
, "%s/%d", net_str
, prefixlen
);
1470 /* Utility function for making IPv6 address string. */
1471 const char *inet6_ntoa(struct in6_addr addr
)
1473 static char buf
[INET6_ADDRSTRLEN
];
1475 inet_ntop(AF_INET6
, &addr
, buf
, INET6_ADDRSTRLEN
);
1479 /* converts to internal representation of mac address
1480 * returns 1 on success, 0 otherwise
1481 * format accepted: AA:BB:CC:DD:EE:FF
1482 * if mac parameter is null, then check only
1484 int prefix_str2mac(const char *str
, struct ethaddr
*mac
)
1492 if (sscanf(str
, "%2x:%2x:%2x:%2x:%2x:%2x", a
+ 0, a
+ 1, a
+ 2, a
+ 3,
1495 /* error in incoming str length */
1498 /* valid mac address */
1501 for (i
= 0; i
< 6; ++i
)
1502 mac
->octet
[i
] = a
[i
] & 0xff;
1506 char *prefix_mac2str(const struct ethaddr
*mac
, char *buf
, int size
)
1513 ptr
= (char *)XMALLOC(MTYPE_TMP
,
1514 ETHER_ADDR_STRLEN
* sizeof(char));
1516 assert(size
>= ETHER_ADDR_STRLEN
);
1519 snprintf(ptr
, (ETHER_ADDR_STRLEN
), "%02x:%02x:%02x:%02x:%02x:%02x",
1520 (uint8_t)mac
->octet
[0], (uint8_t)mac
->octet
[1],
1521 (uint8_t)mac
->octet
[2], (uint8_t)mac
->octet
[3],
1522 (uint8_t)mac
->octet
[4], (uint8_t)mac
->octet
[5]);
1526 unsigned prefix_hash_key(void *pp
)
1530 if (((struct prefix
*)pp
)->family
== AF_FLOWSPEC
) {
1534 /* make sure *all* unused bits are zero,
1535 * particularly including alignment /
1536 * padding and unused prefix bytes.
1538 memset(©
, 0, sizeof(copy
));
1539 prefix_copy(©
, (struct prefix
*)pp
);
1540 len
= jhash((void *)copy
.u
.prefix_flowspec
.ptr
,
1541 copy
.u
.prefix_flowspec
.prefixlen
,
1543 temp
= (void *)copy
.u
.prefix_flowspec
.ptr
;
1544 XFREE(MTYPE_PREFIX_FLOWSPEC
, temp
);
1545 copy
.u
.prefix_flowspec
.ptr
= (uintptr_t)NULL
;
1548 /* make sure *all* unused bits are zero, particularly including
1550 * padding and unused prefix bytes. */
1551 memset(©
, 0, sizeof(copy
));
1552 prefix_copy(©
, (struct prefix
*)pp
);
1554 offsetof(struct prefix
, u
.prefix
) + PSIZE(copy
.prefixlen
),
1558 /* converts to internal representation of esi
1559 * returns 1 on success, 0 otherwise
1560 * format accepted: aa:aa:aa:aa:aa:aa:aa:aa:aa:aa
1561 * if esi parameter is null, then check only
1563 int str_to_esi(const char *str
, esi_t
*esi
)
1566 unsigned int a
[ESI_BYTES
];
1571 if (sscanf(str
, "%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x",
1572 a
+ 0, a
+ 1, a
+ 2, a
+ 3,
1573 a
+ 4, a
+ 5, a
+ 6, a
+ 7,
1576 /* error in incoming str length */
1583 for (i
= 0; i
< ESI_BYTES
; ++i
)
1584 esi
->val
[i
] = a
[i
] & 0xff;
1588 char *esi_to_str(const esi_t
*esi
, char *buf
, int size
)
1595 ptr
= (char *)XMALLOC(MTYPE_TMP
,
1596 ESI_STR_LEN
* sizeof(char));
1598 assert(size
>= ESI_STR_LEN
);
1602 snprintf(ptr
, ESI_STR_LEN
,
1603 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1604 esi
->val
[0], esi
->val
[1], esi
->val
[2],
1605 esi
->val
[3], esi
->val
[4], esi
->val
[5],
1606 esi
->val
[6], esi
->val
[7], esi
->val
[8],