]> git.proxmox.com Git - mirror_frr.git/blob - lib/prefix.c
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #2501 from pacovn/infer_unused1
[mirror_frr.git] / lib / prefix.c
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 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
20 */
21
22 #include <zebra.h>
23
24 #include "prefix.h"
25 #include "vty.h"
26 #include "sockunion.h"
27 #include "memory.h"
28 #include "log.h"
29 #include "jhash.h"
30
31 DEFINE_MTYPE_STATIC(LIB, PREFIX, "Prefix")
32
33 /* Maskbit. */
34 static const uint8_t maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
35 0xf8, 0xfc, 0xfe, 0xff};
36
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}}},
40 /* /1 */
41 {{{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
42 0x00, 0x00, 0x00, 0x00, 0x00}}},
43 /* /2 */
44 {{{0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
45 0x00, 0x00, 0x00, 0x00, 0x00}}},
46 /* /3 */
47 {{{0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 0x00, 0x00, 0x00, 0x00, 0x00}}},
49 /* /4 */
50 {{{0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00}}},
52 /* /5 */
53 {{{0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 0x00, 0x00, 0x00, 0x00, 0x00}}},
55 /* /6 */
56 {{{0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 0x00, 0x00, 0x00, 0x00, 0x00}}},
58 /* /7 */
59 {{{0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
60 0x00, 0x00, 0x00, 0x00, 0x00}}},
61 /* /8 */
62 {{{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63 0x00, 0x00, 0x00, 0x00, 0x00}}},
64 /* /9 */
65 {{{0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
66 0x00, 0x00, 0x00, 0x00, 0x00}}},
67 /* /10 */
68 {{{0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
69 0x00, 0x00, 0x00, 0x00, 0x00}}},
70 /* /11 */
71 {{{0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
72 0x00, 0x00, 0x00, 0x00, 0x00}}},
73 /* /12 */
74 {{{0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75 0x00, 0x00, 0x00, 0x00, 0x00}}},
76 /* /13 */
77 {{{0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0x00}}},
79 /* /14 */
80 {{{0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0x00}}},
82 /* /15 */
83 {{{0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00}}},
85 /* /16 */
86 {{{0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0x00}}},
88 /* /17 */
89 {{{0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x00, 0x00}}},
91 /* /18 */
92 {{{0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
93 0x00, 0x00, 0x00, 0x00, 0x00}}},
94 /* /19 */
95 {{{0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
96 0x00, 0x00, 0x00, 0x00, 0x00}}},
97 /* /20 */
98 {{{0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
99 0x00, 0x00, 0x00, 0x00, 0x00}}},
100 /* /21 */
101 {{{0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
102 0x00, 0x00, 0x00, 0x00, 0x00}}},
103 /* /22 */
104 {{{0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
105 0x00, 0x00, 0x00, 0x00, 0x00}}},
106 /* /23 */
107 {{{0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
108 0x00, 0x00, 0x00, 0x00, 0x00}}},
109 /* /24 */
110 {{{0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
111 0x00, 0x00, 0x00, 0x00, 0x00}}},
112 /* /25 */
113 {{{0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
114 0x00, 0x00, 0x00, 0x00, 0x00}}},
115 /* /26 */
116 {{{0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
117 0x00, 0x00, 0x00, 0x00, 0x00}}},
118 /* /27 */
119 {{{0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
120 0x00, 0x00, 0x00, 0x00, 0x00}}},
121 /* /28 */
122 {{{0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
123 0x00, 0x00, 0x00, 0x00, 0x00}}},
124 /* /29 */
125 {{{0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
126 0x00, 0x00, 0x00, 0x00, 0x00}}},
127 /* /30 */
128 {{{0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
129 0x00, 0x00, 0x00, 0x00, 0x00}}},
130 /* /31 */
131 {{{0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
132 0x00, 0x00, 0x00, 0x00, 0x00}}},
133 /* /32 */
134 {{{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
135 0x00, 0x00, 0x00, 0x00, 0x00}}},
136 /* /33 */
137 {{{0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
138 0x00, 0x00, 0x00, 0x00, 0x00}}},
139 /* /34 */
140 {{{0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
141 0x00, 0x00, 0x00, 0x00, 0x00}}},
142 /* /35 */
143 {{{0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
144 0x00, 0x00, 0x00, 0x00, 0x00}}},
145 /* /36 */
146 {{{0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
147 0x00, 0x00, 0x00, 0x00, 0x00}}},
148 /* /37 */
149 {{{0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
150 0x00, 0x00, 0x00, 0x00, 0x00}}},
151 /* /38 */
152 {{{0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
153 0x00, 0x00, 0x00, 0x00, 0x00}}},
154 /* /39 */
155 {{{0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
156 0x00, 0x00, 0x00, 0x00, 0x00}}},
157 /* /40 */
158 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
159 0x00, 0x00, 0x00, 0x00, 0x00}}},
160 /* /41 */
161 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
162 0x00, 0x00, 0x00, 0x00, 0x00}}},
163 /* /42 */
164 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
165 0x00, 0x00, 0x00, 0x00, 0x00}}},
166 /* /43 */
167 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
168 0x00, 0x00, 0x00, 0x00, 0x00}}},
169 /* /44 */
170 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00,
171 0x00, 0x00, 0x00, 0x00, 0x00}}},
172 /* /45 */
173 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00,
174 0x00, 0x00, 0x00, 0x00, 0x00}}},
175 /* /46 */
176 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00,
177 0x00, 0x00, 0x00, 0x00, 0x00}}},
178 /* /47 */
179 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
180 0x00, 0x00, 0x00, 0x00, 0x00}}},
181 /* /48 */
182 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
183 0x00, 0x00, 0x00, 0x00, 0x00}}},
184 /* /49 */
185 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00,
186 0x00, 0x00, 0x00, 0x00, 0x00}}},
187 /* /50 */
188 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00,
189 0x00, 0x00, 0x00, 0x00, 0x00}}},
190 /* /51 */
191 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00,
192 0x00, 0x00, 0x00, 0x00, 0x00}}},
193 /* /52 */
194 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00,
195 0x00, 0x00, 0x00, 0x00, 0x00}}},
196 /* /53 */
197 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00,
198 0x00, 0x00, 0x00, 0x00, 0x00}}},
199 /* /54 */
200 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00,
201 0x00, 0x00, 0x00, 0x00, 0x00}}},
202 /* /55 */
203 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00,
204 0x00, 0x00, 0x00, 0x00, 0x00}}},
205 /* /56 */
206 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
207 0x00, 0x00, 0x00, 0x00, 0x00}}},
208 /* /57 */
209 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00,
210 0x00, 0x00, 0x00, 0x00, 0x00}}},
211 /* /58 */
212 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00,
213 0x00, 0x00, 0x00, 0x00, 0x00}}},
214 /* /59 */
215 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00,
216 0x00, 0x00, 0x00, 0x00, 0x00}}},
217 /* /60 */
218 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00,
219 0x00, 0x00, 0x00, 0x00, 0x00}}},
220 /* /61 */
221 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00,
222 0x00, 0x00, 0x00, 0x00, 0x00}}},
223 /* /62 */
224 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00,
225 0x00, 0x00, 0x00, 0x00, 0x00}}},
226 /* /63 */
227 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00,
228 0x00, 0x00, 0x00, 0x00, 0x00}}},
229 /* /64 */
230 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00,
231 0x00, 0x00, 0x00, 0x00, 0x00}}},
232 /* /65 */
233 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00,
234 0x00, 0x00, 0x00, 0x00, 0x00}}},
235 /* /66 */
236 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00,
237 0x00, 0x00, 0x00, 0x00, 0x00}}},
238 /* /67 */
239 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00,
240 0x00, 0x00, 0x00, 0x00, 0x00}}},
241 /* /68 */
242 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00,
243 0x00, 0x00, 0x00, 0x00, 0x00}}},
244 /* /69 */
245 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00,
246 0x00, 0x00, 0x00, 0x00, 0x00}}},
247 /* /70 */
248 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00,
249 0x00, 0x00, 0x00, 0x00, 0x00}}},
250 /* /71 */
251 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00,
252 0x00, 0x00, 0x00, 0x00, 0x00}}},
253 /* /72 */
254 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
255 0x00, 0x00, 0x00, 0x00, 0x00}}},
256 /* /73 */
257 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00,
258 0x00, 0x00, 0x00, 0x00, 0x00}}},
259 /* /74 */
260 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00,
261 0x00, 0x00, 0x00, 0x00, 0x00}}},
262 /* /75 */
263 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00,
264 0x00, 0x00, 0x00, 0x00, 0x00}}},
265 /* /76 */
266 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00,
267 0x00, 0x00, 0x00, 0x00, 0x00}}},
268 /* /77 */
269 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00,
270 0x00, 0x00, 0x00, 0x00, 0x00}}},
271 /* /78 */
272 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00,
273 0x00, 0x00, 0x00, 0x00, 0x00}}},
274 /* /79 */
275 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00,
276 0x00, 0x00, 0x00, 0x00, 0x00}}},
277 /* /80 */
278 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
279 0x00, 0x00, 0x00, 0x00, 0x00}}},
280 /* /81 */
281 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80,
282 0x00, 0x00, 0x00, 0x00, 0x00}}},
283 /* /82 */
284 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0,
285 0x00, 0x00, 0x00, 0x00, 0x00}}},
286 /* /83 */
287 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0,
288 0x00, 0x00, 0x00, 0x00, 0x00}}},
289 /* /84 */
290 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
291 0x00, 0x00, 0x00, 0x00, 0x00}}},
292 /* /85 */
293 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8,
294 0x00, 0x00, 0x00, 0x00, 0x00}}},
295 /* /86 */
296 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc,
297 0x00, 0x00, 0x00, 0x00, 0x00}}},
298 /* /87 */
299 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
300 0x00, 0x00, 0x00, 0x00, 0x00}}},
301 /* /88 */
302 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
303 0x00, 0x00, 0x00, 0x00, 0x00}}},
304 /* /89 */
305 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
306 0x80, 0x00, 0x00, 0x00, 0x00}}},
307 /* /90 */
308 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
309 0xc0, 0x00, 0x00, 0x00, 0x00}}},
310 /* /91 */
311 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
312 0xe0, 0x00, 0x00, 0x00, 0x00}}},
313 /* /92 */
314 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
315 0xf0, 0x00, 0x00, 0x00, 0x00}}},
316 /* /93 */
317 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
318 0xf8, 0x00, 0x00, 0x00, 0x00}}},
319 /* /94 */
320 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
321 0xfc, 0x00, 0x00, 0x00, 0x00}}},
322 /* /95 */
323 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
324 0xfe, 0x00, 0x00, 0x00, 0x00}}},
325 /* /96 */
326 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
327 0xff, 0x00, 0x00, 0x00, 0x00}}},
328 /* /97 */
329 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
330 0xff, 0x80, 0x00, 0x00, 0x00}}},
331 /* /98 */
332 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
333 0xff, 0xc0, 0x00, 0x00, 0x00}}},
334 /* /99 */
335 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
336 0xff, 0xe0, 0x00, 0x00, 0x00}}},
337 /* /100 */
338 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
339 0xff, 0xf0, 0x00, 0x00, 0x00}}},
340 /* /101 */
341 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
342 0xff, 0xf8, 0x00, 0x00, 0x00}}},
343 /* /102 */
344 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
345 0xff, 0xfc, 0x00, 0x00, 0x00}}},
346 /* /103 */
347 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
348 0xff, 0xfe, 0x00, 0x00, 0x00}}},
349 /* /104 */
350 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
351 0xff, 0xff, 0x00, 0x00, 0x00}}},
352 /* /105 */
353 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
354 0xff, 0xff, 0x80, 0x00, 0x00}}},
355 /* /106 */
356 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
357 0xff, 0xff, 0xc0, 0x00, 0x00}}},
358 /* /107 */
359 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
360 0xff, 0xff, 0xe0, 0x00, 0x00}}},
361 /* /108 */
362 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
363 0xff, 0xff, 0xf0, 0x00, 0x00}}},
364 /* /109 */
365 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
366 0xff, 0xff, 0xf8, 0x00, 0x00}}},
367 /* /110 */
368 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
369 0xff, 0xff, 0xfc, 0x00, 0x00}}},
370 /* /111 */
371 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
372 0xff, 0xff, 0xfe, 0x00, 0x00}}},
373 /* /112 */
374 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
375 0xff, 0xff, 0xff, 0x00, 0x00}}},
376 /* /113 */
377 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
378 0xff, 0xff, 0xff, 0x80, 0x00}}},
379 /* /114 */
380 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
381 0xff, 0xff, 0xff, 0xc0, 0x00}}},
382 /* /115 */
383 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
384 0xff, 0xff, 0xff, 0xe0, 0x00}}},
385 /* /116 */
386 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0xf0, 0x00}}},
388 /* /117 */
389 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
390 0xff, 0xff, 0xff, 0xf8, 0x00}}},
391 /* /118 */
392 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
393 0xff, 0xff, 0xff, 0xfc, 0x00}}},
394 /* /119 */
395 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
396 0xff, 0xff, 0xff, 0xfe, 0x00}}},
397 /* /120 */
398 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
399 0xff, 0xff, 0xff, 0xff, 0x00}}},
400 /* /121 */
401 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
402 0xff, 0xff, 0xff, 0xff, 0x80}}},
403 /* /122 */
404 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
405 0xff, 0xff, 0xff, 0xff, 0xc0}}},
406 /* /123 */
407 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0xff, 0xe0}}},
409 /* /124 */
410 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
411 0xff, 0xff, 0xff, 0xff, 0xf0}}},
412 /* /125 */
413 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
414 0xff, 0xff, 0xff, 0xff, 0xf8}}},
415 /* /126 */
416 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
417 0xff, 0xff, 0xff, 0xff, 0xfc}}},
418 /* /127 */
419 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
420 0xff, 0xff, 0xff, 0xff, 0xfe}}},
421 /* /128 */
422 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
423 0xff, 0xff, 0xff, 0xff, 0xff}}}};
424
425 /* Number of bits in prefix type. */
426 #ifndef PNBBY
427 #define PNBBY 8
428 #endif /* PNBBY */
429
430 #define MASKBIT(offset) ((0xff << (PNBBY - (offset))) & 0xff)
431
432 void prefix_hexdump(const struct prefix *p)
433 {
434 char buf[PREFIX_STRLEN];
435
436 zlog_debug("prefix: %s",
437 prefix2str(p, buf, sizeof(buf)));
438 zlog_hexdump(p, sizeof(struct prefix));
439 }
440
441 int is_zero_mac(struct ethaddr *mac)
442 {
443 int i = 0;
444
445 for (i = 0; i < ETH_ALEN; i++) {
446 if (mac->octet[i])
447 return 0;
448 }
449
450 return 1;
451 }
452
453 unsigned int prefix_bit(const uint8_t *prefix, const uint8_t prefixlen)
454 {
455 unsigned int offset = prefixlen / 8;
456 unsigned int shift = 7 - (prefixlen % 8);
457
458 return (prefix[offset] >> shift) & 1;
459 }
460
461 unsigned int prefix6_bit(const struct in6_addr *prefix, const uint8_t prefixlen)
462 {
463 return prefix_bit((const uint8_t *)&prefix->s6_addr, prefixlen);
464 }
465
466 int str2family(const char *string)
467 {
468 if (!strcmp("ipv4", string))
469 return AF_INET;
470 else if (!strcmp("ipv6", string))
471 return AF_INET6;
472 else if (!strcmp("ethernet", string))
473 return AF_ETHERNET;
474 else if (!strcmp("evpn", string))
475 return AF_EVPN;
476 return -1;
477 }
478
479 const char *family2str(int family)
480 {
481 switch (family) {
482 case AF_INET:
483 return "IPv4";
484 case AF_INET6:
485 return "IPv6";
486 case AF_ETHERNET:
487 return "Ethernet";
488 case AF_EVPN:
489 return "Evpn";
490 }
491 return "?";
492 }
493
494 /* Address Famiy Identifier to Address Family converter. */
495 int afi2family(afi_t afi)
496 {
497 if (afi == AFI_IP)
498 return AF_INET;
499 else if (afi == AFI_IP6)
500 return AF_INET6;
501 else if (afi == AFI_L2VPN)
502 return AF_ETHERNET;
503 /* NOTE: EVPN code should NOT use this interface. */
504 return 0;
505 }
506
507 afi_t family2afi(int family)
508 {
509 if (family == AF_INET)
510 return AFI_IP;
511 else if (family == AF_INET6)
512 return AFI_IP6;
513 else if (family == AF_ETHERNET || family == AF_EVPN)
514 return AFI_L2VPN;
515 return 0;
516 }
517
518 const char *afi2str(afi_t afi)
519 {
520 switch (afi) {
521 case AFI_IP:
522 return "IPv4";
523 case AFI_IP6:
524 return "IPv6";
525 case AFI_L2VPN:
526 return "l2vpn";
527 case AFI_MAX:
528 return "bad-value";
529 default:
530 break;
531 }
532 return NULL;
533 }
534
535 const char *safi2str(safi_t safi)
536 {
537 switch (safi) {
538 case SAFI_UNICAST:
539 return "unicast";
540 case SAFI_MULTICAST:
541 return "multicast";
542 case SAFI_MPLS_VPN:
543 return "vpn";
544 case SAFI_ENCAP:
545 return "encap";
546 case SAFI_EVPN:
547 return "evpn";
548 case SAFI_LABELED_UNICAST:
549 return "labeled-unicast";
550 case SAFI_FLOWSPEC:
551 return "flowspec";
552 default:
553 return "unknown";
554 }
555 }
556
557 /* If n includes p prefix then return 1 else return 0. */
558 int prefix_match(const struct prefix *n, const struct prefix *p)
559 {
560 int offset;
561 int shift;
562 const uint8_t *np, *pp;
563
564 /* If n's prefix is longer than p's one return 0. */
565 if (n->prefixlen > p->prefixlen)
566 return 0;
567
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)
572 return 0;
573
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;
577
578 offset = n->u.prefix_flowspec.prefixlen;
579
580 while (offset--)
581 if (np[offset] != pp[offset])
582 return 0;
583 return 1;
584 }
585
586 /* Set both prefix's head pointer. */
587 np = n->u.val;
588 pp = p->u.val;
589
590 offset = n->prefixlen / PNBBY;
591 shift = n->prefixlen % PNBBY;
592
593 if (shift)
594 if (maskbit[shift] & (np[offset] ^ pp[offset]))
595 return 0;
596
597 while (offset--)
598 if (np[offset] != pp[offset])
599 return 0;
600 return 1;
601 }
602
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)
606 {
607 int offset;
608 int shift;
609 const uint8_t *np, *pp;
610
611 /* Set both prefix's head pointer. */
612 np = n->u.val;
613 pp = p->u.val;
614
615 offset = n->prefixlen / PNBBY;
616 shift = n->prefixlen % PNBBY;
617
618 if (shift)
619 if (maskbit[shift] & (np[offset] ^ pp[offset]))
620 return 0;
621
622 while (offset--)
623 if (np[offset] != pp[offset])
624 return 0;
625 return 1;
626 }
627
628 void prefix_copy(struct prefix *dest, const struct prefix *src)
629 {
630 dest->family = src->family;
631 dest->prefixlen = src->prefixlen;
632
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) {
647 void *temp;
648 int len;
649
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);
658 } else {
659 zlog_err("prefix_copy(): Unknown address family %d",
660 src->family);
661 assert(0);
662 }
663 }
664
665 /*
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).
672 */
673 int prefix_same(const struct prefix *p1, const struct prefix *p2)
674 {
675 if ((p1 && !p2) || (!p1 && p2))
676 return 0;
677
678 if (!p1 && !p2)
679 return 1;
680
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))
684 return 1;
685 if (p1->family == AF_INET6)
686 if (IPV6_ADDR_SAME(&p1->u.prefix6.s6_addr,
687 &p2->u.prefix6.s6_addr))
688 return 1;
689 if (p1->family == AF_ETHERNET)
690 if (!memcmp(&p1->u.prefix_eth, &p2->u.prefix_eth,
691 sizeof(struct ethaddr)))
692 return 1;
693 if (p1->family == AF_EVPN)
694 if (!memcmp(&p1->u.prefix_evpn, &p2->u.prefix_evpn,
695 sizeof(struct evpn_addr)))
696 return 1;
697 if (p1->family == AF_FLOWSPEC) {
698 if (p1->u.prefix_flowspec.prefixlen !=
699 p2->u.prefix_flowspec.prefixlen)
700 return 0;
701 if (!memcmp(&p1->u.prefix_flowspec.ptr,
702 &p2->u.prefix_flowspec.ptr,
703 p2->u.prefix_flowspec.prefixlen))
704 return 1;
705 }
706 }
707 return 0;
708 }
709
710 /*
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
718 * from prefix_same).
719 */
720 int prefix_cmp(const struct prefix *p1, const struct prefix *p2)
721 {
722 int offset;
723 int shift;
724
725 /* Set both prefix's head pointer. */
726 const uint8_t *pp1;
727 const uint8_t *pp2;
728
729 if (p1->family != p2->family)
730 return 1;
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;
734
735 if (p1->u.prefix_flowspec.prefixlen !=
736 p2->u.prefix_flowspec.prefixlen)
737 return 1;
738
739 offset = p1->u.prefix_flowspec.prefixlen;
740 while (offset--)
741 if (pp1[offset] != pp2[offset])
742 return 1;
743 return 0;
744 }
745 pp1 = p1->u.val;
746 pp2 = p2->u.val;
747
748 if (p1->prefixlen != p2->prefixlen)
749 return 1;
750 offset = p1->prefixlen / PNBBY;
751 shift = p1->prefixlen % PNBBY;
752
753 if (shift)
754 if (maskbit[shift] & (pp1[offset] ^ pp2[offset]))
755 return 1;
756
757 while (offset--)
758 if (pp1[offset] != pp2[offset])
759 return 1;
760
761 return 0;
762 }
763
764 /*
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.
769 */
770 int prefix_common_bits(const struct prefix *p1, const struct prefix *p2)
771 {
772 int pos, bit;
773 int length = 0;
774 uint8_t xor ;
775
776 /* Set both prefix's head pointer. */
777 const uint8_t *pp1 = p1->u.val;
778 const uint8_t *pp2 = p2->u.val;
779
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)
785 length = ETH_ALEN;
786 if (p1->family == AF_EVPN)
787 length = 8 * sizeof(struct evpn_addr);
788
789 if (p1->family != p2->family || !length)
790 return -1;
791
792 for (pos = 0; pos < length; pos++)
793 if (pp1[pos] != pp2[pos])
794 break;
795 if (pos == length)
796 return pos * 8;
797
798 xor = pp1[pos] ^ pp2[pos];
799 for (bit = 0; bit < 8; bit++)
800 if (xor&(1 << (7 - bit)))
801 break;
802
803 return pos * 8 + bit;
804 }
805
806 /* Return prefix family type string. */
807 const char *prefix_family_str(const struct prefix *p)
808 {
809 if (p->family == AF_INET)
810 return "inet";
811 if (p->family == AF_INET6)
812 return "inet6";
813 if (p->family == AF_ETHERNET)
814 return "ether";
815 if (p->family == AF_EVPN)
816 return "evpn";
817 return "unspec";
818 }
819
820 /* Allocate new prefix_ipv4 structure. */
821 struct prefix_ipv4 *prefix_ipv4_new()
822 {
823 struct prefix_ipv4 *p;
824
825 /* Call prefix_new to allocate a full-size struct prefix to avoid
826 problems
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();
830 p->family = AF_INET;
831 return p;
832 }
833
834 /* Free prefix_ipv4 structure. */
835 void prefix_ipv4_free(struct prefix_ipv4 *p)
836 {
837 prefix_free((struct prefix *)p);
838 }
839
840 /* When string format is invalid return 0. */
841 int str2prefix_ipv4(const char *str, struct prefix_ipv4 *p)
842 {
843 int ret;
844 int plen;
845 char *pnt;
846 char *cp;
847
848 /* Find slash inside string. */
849 pnt = strchr(str, '/');
850
851 /* String doesn't contail slash. */
852 if (pnt == NULL) {
853 /* Convert string to prefix. */
854 ret = inet_aton(str, &p->prefix);
855 if (ret == 0)
856 return 0;
857
858 /* If address doesn't contain slash we assume it host address.
859 */
860 p->family = AF_INET;
861 p->prefixlen = IPV4_MAX_BITLEN;
862
863 return ret;
864 } else {
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);
870
871 /* Get prefix length. */
872 plen = (uint8_t)atoi(++pnt);
873 if (plen > IPV4_MAX_PREFIXLEN)
874 return 0;
875
876 p->family = AF_INET;
877 p->prefixlen = plen;
878 }
879
880 return ret;
881 }
882
883 /* When string format is invalid return 0. */
884 int str2prefix_eth(const char *str, struct prefix_eth *p)
885 {
886 int ret = 0;
887 int plen = 48;
888 char *pnt;
889 char *cp = NULL;
890 const char *str_addr = str;
891 unsigned int a[6];
892 int i;
893 bool slash = false;
894
895 if (!strcmp(str, "any")) {
896 memset(p, 0, sizeof(*p));
897 p->family = AF_ETHERNET;
898 return 1;
899 }
900
901 /* Find slash inside string. */
902 pnt = strchr(str, '/');
903
904 if (pnt) {
905 /* Get prefix length. */
906 plen = (uint8_t)atoi(++pnt);
907 if (plen > 48) {
908 ret = 0;
909 goto done;
910 }
911
912 cp = XMALLOC(MTYPE_TMP, (pnt - str) + 1);
913 strncpy(cp, str, pnt - str);
914 *(cp + (pnt - str)) = '\0';
915
916 str_addr = cp;
917 slash = true;
918 }
919
920 /* Convert string to prefix. */
921 if (sscanf(str_addr, "%2x:%2x:%2x:%2x:%2x:%2x", a + 0, a + 1, a + 2,
922 a + 3, a + 4, a + 5)
923 != 6) {
924 ret = 0;
925 goto done;
926 }
927 for (i = 0; i < 6; ++i) {
928 p->eth_addr.octet[i] = a[i] & 0xff;
929 }
930 p->prefixlen = plen;
931 p->family = AF_ETHERNET;
932
933 /*
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
937 */
938 if (!slash && is_zero_mac(&(p->eth_addr)))
939 p->prefixlen = 0;
940
941 ret = 1;
942
943 done:
944 if (cp)
945 XFREE(MTYPE_TMP, cp);
946
947 return ret;
948 }
949
950 /* Convert masklen into IP address's netmask (network byte order). */
951 void masklen2ip(const int masklen, struct in_addr *netmask)
952 {
953 assert(masklen >= 0 && masklen <= IPV4_MAX_BITLEN);
954
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) */
958
959 if (sizeof(unsigned long long) > 4)
960 netmask->s_addr = htonl(0xffffffffULL << (32 - masklen));
961 else
962 netmask->s_addr =
963 htonl(masklen ? 0xffffffffU << (32 - masklen) : 0);
964 }
965
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)
969 {
970 uint32_t tmp = ~ntohl(netmask.s_addr);
971 if (tmp)
972 /* clz: count leading zeroes. sadly, the behaviour of this
973 * builtin
974 * is undefined for a 0 argument, even though most CPUs give 32
975 */
976 return __builtin_clz(tmp);
977 else
978 return 32;
979 }
980
981 /* Apply mask to IPv4 prefix (network byte order). */
982 void apply_mask_ipv4(struct prefix_ipv4 *p)
983 {
984 struct in_addr mask;
985 masklen2ip(p->prefixlen, &mask);
986 p->prefix.s_addr &= mask.s_addr;
987 }
988
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)
991 {
992 return (p->prefix.s_addr == 0 && p->prefixlen == 0);
993 }
994
995 /* Allocate a new ip version 6 route */
996 struct prefix_ipv6 *prefix_ipv6_new(void)
997 {
998 struct prefix_ipv6 *p;
999
1000 /* Allocate a full-size struct prefix to avoid problems with structure
1001 size mismatches. */
1002 p = (struct prefix_ipv6 *)prefix_new();
1003 p->family = AF_INET6;
1004 return p;
1005 }
1006
1007 /* Free prefix for IPv6. */
1008 void prefix_ipv6_free(struct prefix_ipv6 *p)
1009 {
1010 prefix_free((struct prefix *)p);
1011 }
1012
1013 /* If given string is valid return pin6 else return NULL */
1014 int str2prefix_ipv6(const char *str, struct prefix_ipv6 *p)
1015 {
1016 char *pnt;
1017 char *cp;
1018 int ret;
1019
1020 pnt = strchr(str, '/');
1021
1022 /* If string doesn't contain `/' treat it as host route. */
1023 if (pnt == NULL) {
1024 ret = inet_pton(AF_INET6, str, &p->prefix);
1025 if (ret == 0)
1026 return 0;
1027 p->prefixlen = IPV6_MAX_BITLEN;
1028 } else {
1029 int plen;
1030
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);
1036 if (ret == 0)
1037 return 0;
1038 plen = (uint8_t)atoi(++pnt);
1039 if (plen > IPV6_MAX_BITLEN)
1040 return 0;
1041 p->prefixlen = plen;
1042 }
1043 p->family = AF_INET6;
1044
1045 return ret;
1046 }
1047
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)
1051 {
1052 int len = 0;
1053 unsigned char val;
1054 unsigned char *pnt;
1055
1056 pnt = (unsigned char *)&netmask;
1057
1058 while ((*pnt == 0xff) && len < IPV6_MAX_BITLEN) {
1059 len += 8;
1060 pnt++;
1061 }
1062
1063 if (len < IPV6_MAX_BITLEN) {
1064 val = *pnt;
1065 while (val) {
1066 len++;
1067 val <<= 1;
1068 }
1069 }
1070 return len;
1071 }
1072
1073 void masklen2ip6(const int masklen, struct in6_addr *netmask)
1074 {
1075 assert(masklen >= 0 && masklen <= IPV6_MAX_BITLEN);
1076 memcpy(netmask, maskbytes6 + masklen, sizeof(struct in6_addr));
1077 }
1078
1079 void apply_mask_ipv6(struct prefix_ipv6 *p)
1080 {
1081 uint8_t *pnt;
1082 int index;
1083 int offset;
1084
1085 index = p->prefixlen / 8;
1086
1087 if (index < 16) {
1088 pnt = (uint8_t *)&p->prefix;
1089 offset = p->prefixlen % 8;
1090
1091 pnt[index] &= maskbit[offset];
1092 index++;
1093
1094 while (index < 16)
1095 pnt[index++] = 0;
1096 }
1097 }
1098
1099 void apply_mask(struct prefix *p)
1100 {
1101 switch (p->family) {
1102 case AF_INET:
1103 apply_mask_ipv4((struct prefix_ipv4 *)p);
1104 break;
1105 case AF_INET6:
1106 apply_mask_ipv6((struct prefix_ipv6 *)p);
1107 break;
1108 default:
1109 break;
1110 }
1111 return;
1112 }
1113
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)
1118 {
1119 if (dest->sa.sa_family == AF_INET) {
1120 struct prefix_ipv4 *p;
1121
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;
1127 }
1128 if (dest->sa.sa_family == AF_INET6) {
1129 struct prefix_ipv6 *p;
1130
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;
1137 }
1138 return NULL;
1139 }
1140
1141 /* Utility function of convert between struct prefix <=> union sockunion. */
1142 struct prefix *sockunion2hostprefix(const union sockunion *su,
1143 struct prefix *prefix)
1144 {
1145 if (su->sa.sa_family == AF_INET) {
1146 struct prefix_ipv4 *p;
1147
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;
1153 }
1154 if (su->sa.sa_family == AF_INET6) {
1155 struct prefix_ipv6 *p;
1156
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;
1163 }
1164 return NULL;
1165 }
1166
1167 void prefix2sockunion(const struct prefix *p, union sockunion *su)
1168 {
1169 memset(su, 0, sizeof(*su));
1170
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));
1177 }
1178
1179 int prefix_blen(const struct prefix *p)
1180 {
1181 switch (p->family) {
1182 case AF_INET:
1183 return IPV4_MAX_BYTELEN;
1184 break;
1185 case AF_INET6:
1186 return IPV6_MAX_BYTELEN;
1187 break;
1188 case AF_ETHERNET:
1189 return ETH_ALEN;
1190 break;
1191 }
1192 return 0;
1193 }
1194
1195 /* Generic function for conversion string to struct prefix. */
1196 int str2prefix(const char *str, struct prefix *p)
1197 {
1198 int ret;
1199
1200 if (!str || !p)
1201 return 0;
1202
1203 /* First we try to convert string to struct prefix_ipv4. */
1204 ret = str2prefix_ipv4(str, (struct prefix_ipv4 *)p);
1205 if (ret)
1206 return ret;
1207
1208 /* Next we try to convert string to struct prefix_ipv6. */
1209 ret = str2prefix_ipv6(str, (struct prefix_ipv6 *)p);
1210 if (ret)
1211 return ret;
1212
1213 /* Next we try to convert string to struct prefix_eth. */
1214 ret = str2prefix_eth(str, (struct prefix_eth *)p);
1215 if (ret)
1216 return ret;
1217
1218 return 0;
1219 }
1220
1221 static const char *prefixevpn_ead2str(const struct prefix_evpn *p, char *str,
1222 int size)
1223 {
1224 snprintf(str, size, "Unsupported EVPN prefix");
1225 return str;
1226 }
1227
1228 static const char *prefixevpn_macip2str(const struct prefix_evpn *p, char *str,
1229 int size)
1230 {
1231 uint8_t family;
1232 char buf[PREFIX2STR_BUFFER];
1233 char buf2[ETHER_ADDR_STRLEN];
1234
1235 if (is_evpn_prefix_ipaddr_none(p))
1236 snprintf(str, size, "[%d]:[%s]/%d",
1237 p->prefix.route_type,
1238 prefix_mac2str(&p->prefix.macip_addr.mac,
1239 buf2, sizeof(buf2)),
1240 p->prefixlen);
1241 else {
1242 family = is_evpn_prefix_ipaddr_v4(p)
1243 ? AF_INET
1244 : AF_INET6;
1245 snprintf(str, size, "[%d]:[%s]:[%s]/%d",
1246 p->prefix.route_type,
1247 prefix_mac2str(&p->prefix.macip_addr.mac,
1248 buf2, sizeof(buf2)),
1249 inet_ntop(family,
1250 &p->prefix.macip_addr.ip.ip.addr,
1251 buf, PREFIX2STR_BUFFER),
1252 p->prefixlen);
1253 }
1254 return str;
1255 }
1256
1257 static const char *prefixevpn_imet2str(const struct prefix_evpn *p, char *str,
1258 int size)
1259 {
1260 uint8_t family;
1261 char buf[PREFIX2STR_BUFFER];
1262
1263 family = is_evpn_prefix_ipaddr_v4(p)
1264 ? AF_INET
1265 : AF_INET6;
1266 snprintf(str, size, "[%d]:[%s]/%d", p->prefix.route_type,
1267 inet_ntop(family,
1268 &p->prefix.imet_addr.ip.ip.addr, buf,
1269 PREFIX2STR_BUFFER),
1270 p->prefixlen);
1271 return str;
1272 }
1273
1274 static const char *prefixevpn_es2str(const struct prefix_evpn *p, char *str,
1275 int size)
1276 {
1277 char buf[ESI_STR_LEN];
1278
1279 snprintf(str, size, "[%d]:[%s]:[%s]/%d", p->prefix.route_type,
1280 esi_to_str(&p->prefix.es_addr.esi, buf, sizeof(buf)),
1281 inet_ntoa(p->prefix.es_addr.ip.ipaddr_v4),
1282 p->prefixlen);
1283 return str;
1284 }
1285
1286 static const char *prefixevpn_prefix2str(const struct prefix_evpn *p, char *str,
1287 int size)
1288 {
1289 uint8_t family;
1290 char buf[PREFIX2STR_BUFFER];
1291
1292 family = is_evpn_prefix_ipaddr_v4(p)
1293 ? AF_INET
1294 : AF_INET6;
1295 snprintf(str, size, "[%d]:[%u][%s/%d]/%d",
1296 p->prefix.route_type,
1297 p->prefix.prefix_addr.eth_tag,
1298 inet_ntop(family,
1299 &p->prefix.prefix_addr.ip.ip.addr, buf,
1300 PREFIX2STR_BUFFER),
1301 p->prefix.prefix_addr.ip_prefix_length,
1302 p->prefixlen);
1303 return str;
1304 }
1305
1306 static const char *prefixevpn2str(const struct prefix_evpn *p, char *str,
1307 int size)
1308 {
1309 switch (p->prefix.route_type) {
1310 case 1:
1311 return prefixevpn_ead2str(p, str, size);
1312 case 2:
1313 return prefixevpn_macip2str(p, str, size);
1314 case 3:
1315 return prefixevpn_imet2str(p, str, size);
1316 case 4:
1317 return prefixevpn_es2str(p, str, size);
1318 case 5:
1319 return prefixevpn_prefix2str(p, str, size);
1320 default:
1321 snprintf(str, size, "Unsupported EVPN prefix");
1322 break;
1323 }
1324 return str;
1325 }
1326
1327 const char *prefix2str(union prefixconstptr pu, char *str, int size)
1328 {
1329 const struct prefix *p = pu.p;
1330 char buf[PREFIX2STR_BUFFER];
1331
1332 switch (p->family) {
1333 case AF_INET:
1334 case AF_INET6:
1335 snprintf(str, size, "%s/%d", inet_ntop(p->family, &p->u.prefix,
1336 buf, PREFIX2STR_BUFFER),
1337 p->prefixlen);
1338 break;
1339
1340 case AF_ETHERNET:
1341 snprintf(str, size, "%s/%d",
1342 prefix_mac2str(&p->u.prefix_eth, buf, sizeof(buf)),
1343 p->prefixlen);
1344 break;
1345
1346 case AF_EVPN:
1347 prefixevpn2str((const struct prefix_evpn *)p, str, size);
1348 break;
1349
1350 case AF_FLOWSPEC:
1351 sprintf(str, "FS prefix");
1352 break;
1353
1354 default:
1355 sprintf(str, "UNK prefix");
1356 break;
1357 }
1358
1359 return str;
1360 }
1361
1362 struct prefix *prefix_new()
1363 {
1364 struct prefix *p;
1365
1366 p = XCALLOC(MTYPE_PREFIX, sizeof *p);
1367 return p;
1368 }
1369
1370 /* Free prefix structure. */
1371 void prefix_free(struct prefix *p)
1372 {
1373 XFREE(MTYPE_PREFIX, p);
1374 }
1375
1376 /* Utility function to convert ipv4 prefixes to Classful prefixes */
1377 void apply_classful_mask_ipv4(struct prefix_ipv4 *p)
1378 {
1379
1380 uint32_t destination;
1381
1382 destination = ntohl(p->prefix.s_addr);
1383
1384 if (p->prefixlen == IPV4_MAX_PREFIXLEN)
1385 ;
1386 /* do nothing for host routes */
1387 else if (IN_CLASSC(destination)) {
1388 p->prefixlen = 24;
1389 apply_mask_ipv4(p);
1390 } else if (IN_CLASSB(destination)) {
1391 p->prefixlen = 16;
1392 apply_mask_ipv4(p);
1393 } else {
1394 p->prefixlen = 8;
1395 apply_mask_ipv4(p);
1396 }
1397 }
1398
1399 in_addr_t ipv4_network_addr(in_addr_t hostaddr, int masklen)
1400 {
1401 struct in_addr mask;
1402
1403 masklen2ip(masklen, &mask);
1404 return hostaddr & mask.s_addr;
1405 }
1406
1407 in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen)
1408 {
1409 struct in_addr mask;
1410
1411 masklen2ip(masklen, &mask);
1412 return (masklen != IPV4_MAX_PREFIXLEN - 1) ?
1413 /* normal case */
1414 (hostaddr | ~mask.s_addr)
1415 :
1416 /* special case for /31 */
1417 (hostaddr ^ ~mask.s_addr);
1418 }
1419
1420 /* Utility function to convert ipv4 netmask to prefixes
1421 ex.) "1.1.0.0" "255.255.0.0" => "1.1.0.0/16"
1422 ex.) "1.0.0.0" NULL => "1.0.0.0/8" */
1423 int netmask_str2prefix_str(const char *net_str, const char *mask_str,
1424 char *prefix_str)
1425 {
1426 struct in_addr network;
1427 struct in_addr mask;
1428 uint8_t prefixlen;
1429 uint32_t destination;
1430 int ret;
1431
1432 ret = inet_aton(net_str, &network);
1433 if (!ret)
1434 return 0;
1435
1436 if (mask_str) {
1437 ret = inet_aton(mask_str, &mask);
1438 if (!ret)
1439 return 0;
1440
1441 prefixlen = ip_masklen(mask);
1442 } else {
1443 destination = ntohl(network.s_addr);
1444
1445 if (network.s_addr == 0)
1446 prefixlen = 0;
1447 else if (IN_CLASSC(destination))
1448 prefixlen = 24;
1449 else if (IN_CLASSB(destination))
1450 prefixlen = 16;
1451 else if (IN_CLASSA(destination))
1452 prefixlen = 8;
1453 else
1454 return 0;
1455 }
1456
1457 sprintf(prefix_str, "%s/%d", net_str, prefixlen);
1458
1459 return 1;
1460 }
1461
1462 /* Utility function for making IPv6 address string. */
1463 const char *inet6_ntoa(struct in6_addr addr)
1464 {
1465 static char buf[INET6_ADDRSTRLEN];
1466
1467 inet_ntop(AF_INET6, &addr, buf, INET6_ADDRSTRLEN);
1468 return buf;
1469 }
1470
1471 /* converts to internal representation of mac address
1472 * returns 1 on success, 0 otherwise
1473 * format accepted: AA:BB:CC:DD:EE:FF
1474 * if mac parameter is null, then check only
1475 */
1476 int prefix_str2mac(const char *str, struct ethaddr *mac)
1477 {
1478 unsigned int a[6];
1479 int i;
1480
1481 if (!str)
1482 return 0;
1483
1484 if (sscanf(str, "%2x:%2x:%2x:%2x:%2x:%2x", a + 0, a + 1, a + 2, a + 3,
1485 a + 4, a + 5)
1486 != 6) {
1487 /* error in incoming str length */
1488 return 0;
1489 }
1490 /* valid mac address */
1491 if (!mac)
1492 return 1;
1493 for (i = 0; i < 6; ++i)
1494 mac->octet[i] = a[i] & 0xff;
1495 return 1;
1496 }
1497
1498 char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size)
1499 {
1500 char *ptr;
1501
1502 if (!mac)
1503 return NULL;
1504 if (!buf)
1505 ptr = (char *)XMALLOC(MTYPE_TMP,
1506 ETHER_ADDR_STRLEN * sizeof(char));
1507 else {
1508 assert(size >= ETHER_ADDR_STRLEN);
1509 ptr = buf;
1510 }
1511 snprintf(ptr, (ETHER_ADDR_STRLEN), "%02x:%02x:%02x:%02x:%02x:%02x",
1512 (uint8_t)mac->octet[0], (uint8_t)mac->octet[1],
1513 (uint8_t)mac->octet[2], (uint8_t)mac->octet[3],
1514 (uint8_t)mac->octet[4], (uint8_t)mac->octet[5]);
1515 return ptr;
1516 }
1517
1518 unsigned prefix_hash_key(void *pp)
1519 {
1520 struct prefix copy;
1521
1522 if (((struct prefix *)pp)->family == AF_FLOWSPEC) {
1523 uint32_t len;
1524 void *temp;
1525
1526 /* make sure *all* unused bits are zero,
1527 * particularly including alignment /
1528 * padding and unused prefix bytes.
1529 */
1530 memset(&copy, 0, sizeof(copy));
1531 prefix_copy(&copy, (struct prefix *)pp);
1532 len = jhash((void *)copy.u.prefix_flowspec.ptr,
1533 copy.u.prefix_flowspec.prefixlen,
1534 0x55aa5a5a);
1535 temp = (void *)copy.u.prefix_flowspec.ptr;
1536 XFREE(MTYPE_PREFIX_FLOWSPEC, temp);
1537 copy.u.prefix_flowspec.ptr = (uintptr_t)NULL;
1538 return len;
1539 }
1540 /* make sure *all* unused bits are zero, particularly including
1541 * alignment /
1542 * padding and unused prefix bytes. */
1543 memset(&copy, 0, sizeof(copy));
1544 prefix_copy(&copy, (struct prefix *)pp);
1545 return jhash(&copy,
1546 offsetof(struct prefix, u.prefix) + PSIZE(copy.prefixlen),
1547 0x55aa5a5a);
1548 }
1549
1550 /* converts to internal representation of esi
1551 * returns 1 on success, 0 otherwise
1552 * format accepted: aa:aa:aa:aa:aa:aa:aa:aa:aa:aa
1553 * if esi parameter is null, then check only
1554 */
1555 int str_to_esi(const char *str, esi_t *esi)
1556 {
1557 int i;
1558 unsigned int a[ESI_BYTES];
1559
1560 if (!str)
1561 return 0;
1562
1563 if (sscanf(str, "%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x",
1564 a + 0, a + 1, a + 2, a + 3,
1565 a + 4, a + 5, a + 6, a + 7,
1566 a + 8, a + 9)
1567 != ESI_BYTES) {
1568 /* error in incoming str length */
1569 return 0;
1570 }
1571
1572 /* valid ESI */
1573 if (!esi)
1574 return 1;
1575 for (i = 0; i < ESI_BYTES; ++i)
1576 esi->val[i] = a[i] & 0xff;
1577 return 1;
1578 }
1579
1580 char *esi_to_str(const esi_t *esi, char *buf, int size)
1581 {
1582 char *ptr;
1583
1584 if (!esi)
1585 return NULL;
1586 if (!buf)
1587 ptr = (char *)XMALLOC(MTYPE_TMP,
1588 ESI_STR_LEN * sizeof(char));
1589 else {
1590 assert(size >= ESI_STR_LEN);
1591 ptr = buf;
1592 }
1593
1594 snprintf(ptr, ESI_STR_LEN,
1595 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1596 esi->val[0], esi->val[1], esi->val[2],
1597 esi->val[3], esi->val[4], esi->val[5],
1598 esi->val[6], esi->val[7], esi->val[8],
1599 esi->val[9]);
1600 return ptr;
1601 }
FRRouting mirror