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zebra, lib: fix the ZEBRA_INTERFACE_VRF_UPDATE zapi message
[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 #include "lib_errors.h"
31
32 DEFINE_MTYPE_STATIC(LIB, PREFIX, "Prefix")
33
34 /* Maskbit. */
35 static const uint8_t maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
36 0xf8, 0xfc, 0xfe, 0xff};
37
38 static const struct in6_addr maskbytes6[] = {
39 /* /0 */ {{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
40 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
41 /* /1 */
42 {{{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
43 0x00, 0x00, 0x00, 0x00, 0x00}}},
44 /* /2 */
45 {{{0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
46 0x00, 0x00, 0x00, 0x00, 0x00}}},
47 /* /3 */
48 {{{0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
49 0x00, 0x00, 0x00, 0x00, 0x00}}},
50 /* /4 */
51 {{{0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x00, 0x00, 0x00, 0x00}}},
53 /* /5 */
54 {{{0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55 0x00, 0x00, 0x00, 0x00, 0x00}}},
56 /* /6 */
57 {{{0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00, 0x00}}},
59 /* /7 */
60 {{{0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61 0x00, 0x00, 0x00, 0x00, 0x00}}},
62 /* /8 */
63 {{{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
64 0x00, 0x00, 0x00, 0x00, 0x00}}},
65 /* /9 */
66 {{{0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
67 0x00, 0x00, 0x00, 0x00, 0x00}}},
68 /* /10 */
69 {{{0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
70 0x00, 0x00, 0x00, 0x00, 0x00}}},
71 /* /11 */
72 {{{0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
73 0x00, 0x00, 0x00, 0x00, 0x00}}},
74 /* /12 */
75 {{{0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
76 0x00, 0x00, 0x00, 0x00, 0x00}}},
77 /* /13 */
78 {{{0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x00, 0x00}}},
80 /* /14 */
81 {{{0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00}}},
83 /* /15 */
84 {{{0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x00, 0x00}}},
86 /* /16 */
87 {{{0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88 0x00, 0x00, 0x00, 0x00, 0x00}}},
89 /* /17 */
90 {{{0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
91 0x00, 0x00, 0x00, 0x00, 0x00}}},
92 /* /18 */
93 {{{0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94 0x00, 0x00, 0x00, 0x00, 0x00}}},
95 /* /19 */
96 {{{0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
97 0x00, 0x00, 0x00, 0x00, 0x00}}},
98 /* /20 */
99 {{{0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
100 0x00, 0x00, 0x00, 0x00, 0x00}}},
101 /* /21 */
102 {{{0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
103 0x00, 0x00, 0x00, 0x00, 0x00}}},
104 /* /22 */
105 {{{0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
106 0x00, 0x00, 0x00, 0x00, 0x00}}},
107 /* /23 */
108 {{{0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
109 0x00, 0x00, 0x00, 0x00, 0x00}}},
110 /* /24 */
111 {{{0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
112 0x00, 0x00, 0x00, 0x00, 0x00}}},
113 /* /25 */
114 {{{0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
115 0x00, 0x00, 0x00, 0x00, 0x00}}},
116 /* /26 */
117 {{{0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
118 0x00, 0x00, 0x00, 0x00, 0x00}}},
119 /* /27 */
120 {{{0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
121 0x00, 0x00, 0x00, 0x00, 0x00}}},
122 /* /28 */
123 {{{0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
124 0x00, 0x00, 0x00, 0x00, 0x00}}},
125 /* /29 */
126 {{{0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
127 0x00, 0x00, 0x00, 0x00, 0x00}}},
128 /* /30 */
129 {{{0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
130 0x00, 0x00, 0x00, 0x00, 0x00}}},
131 /* /31 */
132 {{{0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
133 0x00, 0x00, 0x00, 0x00, 0x00}}},
134 /* /32 */
135 {{{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
136 0x00, 0x00, 0x00, 0x00, 0x00}}},
137 /* /33 */
138 {{{0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
139 0x00, 0x00, 0x00, 0x00, 0x00}}},
140 /* /34 */
141 {{{0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
142 0x00, 0x00, 0x00, 0x00, 0x00}}},
143 /* /35 */
144 {{{0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
145 0x00, 0x00, 0x00, 0x00, 0x00}}},
146 /* /36 */
147 {{{0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
148 0x00, 0x00, 0x00, 0x00, 0x00}}},
149 /* /37 */
150 {{{0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
151 0x00, 0x00, 0x00, 0x00, 0x00}}},
152 /* /38 */
153 {{{0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
154 0x00, 0x00, 0x00, 0x00, 0x00}}},
155 /* /39 */
156 {{{0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
157 0x00, 0x00, 0x00, 0x00, 0x00}}},
158 /* /40 */
159 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
160 0x00, 0x00, 0x00, 0x00, 0x00}}},
161 /* /41 */
162 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
163 0x00, 0x00, 0x00, 0x00, 0x00}}},
164 /* /42 */
165 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
166 0x00, 0x00, 0x00, 0x00, 0x00}}},
167 /* /43 */
168 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
169 0x00, 0x00, 0x00, 0x00, 0x00}}},
170 /* /44 */
171 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00,
172 0x00, 0x00, 0x00, 0x00, 0x00}}},
173 /* /45 */
174 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00,
175 0x00, 0x00, 0x00, 0x00, 0x00}}},
176 /* /46 */
177 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00,
178 0x00, 0x00, 0x00, 0x00, 0x00}}},
179 /* /47 */
180 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
181 0x00, 0x00, 0x00, 0x00, 0x00}}},
182 /* /48 */
183 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
184 0x00, 0x00, 0x00, 0x00, 0x00}}},
185 /* /49 */
186 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00,
187 0x00, 0x00, 0x00, 0x00, 0x00}}},
188 /* /50 */
189 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00,
190 0x00, 0x00, 0x00, 0x00, 0x00}}},
191 /* /51 */
192 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00,
193 0x00, 0x00, 0x00, 0x00, 0x00}}},
194 /* /52 */
195 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00,
196 0x00, 0x00, 0x00, 0x00, 0x00}}},
197 /* /53 */
198 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00,
199 0x00, 0x00, 0x00, 0x00, 0x00}}},
200 /* /54 */
201 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00,
202 0x00, 0x00, 0x00, 0x00, 0x00}}},
203 /* /55 */
204 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00,
205 0x00, 0x00, 0x00, 0x00, 0x00}}},
206 /* /56 */
207 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
208 0x00, 0x00, 0x00, 0x00, 0x00}}},
209 /* /57 */
210 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00,
211 0x00, 0x00, 0x00, 0x00, 0x00}}},
212 /* /58 */
213 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00,
214 0x00, 0x00, 0x00, 0x00, 0x00}}},
215 /* /59 */
216 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00,
217 0x00, 0x00, 0x00, 0x00, 0x00}}},
218 /* /60 */
219 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00,
220 0x00, 0x00, 0x00, 0x00, 0x00}}},
221 /* /61 */
222 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00,
223 0x00, 0x00, 0x00, 0x00, 0x00}}},
224 /* /62 */
225 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00,
226 0x00, 0x00, 0x00, 0x00, 0x00}}},
227 /* /63 */
228 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00,
229 0x00, 0x00, 0x00, 0x00, 0x00}}},
230 /* /64 */
231 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00,
232 0x00, 0x00, 0x00, 0x00, 0x00}}},
233 /* /65 */
234 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00,
235 0x00, 0x00, 0x00, 0x00, 0x00}}},
236 /* /66 */
237 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00,
238 0x00, 0x00, 0x00, 0x00, 0x00}}},
239 /* /67 */
240 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00,
241 0x00, 0x00, 0x00, 0x00, 0x00}}},
242 /* /68 */
243 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00,
244 0x00, 0x00, 0x00, 0x00, 0x00}}},
245 /* /69 */
246 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00,
247 0x00, 0x00, 0x00, 0x00, 0x00}}},
248 /* /70 */
249 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00,
250 0x00, 0x00, 0x00, 0x00, 0x00}}},
251 /* /71 */
252 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00,
253 0x00, 0x00, 0x00, 0x00, 0x00}}},
254 /* /72 */
255 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
256 0x00, 0x00, 0x00, 0x00, 0x00}}},
257 /* /73 */
258 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00,
259 0x00, 0x00, 0x00, 0x00, 0x00}}},
260 /* /74 */
261 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00,
262 0x00, 0x00, 0x00, 0x00, 0x00}}},
263 /* /75 */
264 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00,
265 0x00, 0x00, 0x00, 0x00, 0x00}}},
266 /* /76 */
267 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00,
268 0x00, 0x00, 0x00, 0x00, 0x00}}},
269 /* /77 */
270 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00,
271 0x00, 0x00, 0x00, 0x00, 0x00}}},
272 /* /78 */
273 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00,
274 0x00, 0x00, 0x00, 0x00, 0x00}}},
275 /* /79 */
276 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00,
277 0x00, 0x00, 0x00, 0x00, 0x00}}},
278 /* /80 */
279 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
280 0x00, 0x00, 0x00, 0x00, 0x00}}},
281 /* /81 */
282 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80,
283 0x00, 0x00, 0x00, 0x00, 0x00}}},
284 /* /82 */
285 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0,
286 0x00, 0x00, 0x00, 0x00, 0x00}}},
287 /* /83 */
288 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0,
289 0x00, 0x00, 0x00, 0x00, 0x00}}},
290 /* /84 */
291 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0,
292 0x00, 0x00, 0x00, 0x00, 0x00}}},
293 /* /85 */
294 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8,
295 0x00, 0x00, 0x00, 0x00, 0x00}}},
296 /* /86 */
297 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc,
298 0x00, 0x00, 0x00, 0x00, 0x00}}},
299 /* /87 */
300 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
301 0x00, 0x00, 0x00, 0x00, 0x00}}},
302 /* /88 */
303 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
304 0x00, 0x00, 0x00, 0x00, 0x00}}},
305 /* /89 */
306 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
307 0x80, 0x00, 0x00, 0x00, 0x00}}},
308 /* /90 */
309 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
310 0xc0, 0x00, 0x00, 0x00, 0x00}}},
311 /* /91 */
312 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
313 0xe0, 0x00, 0x00, 0x00, 0x00}}},
314 /* /92 */
315 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
316 0xf0, 0x00, 0x00, 0x00, 0x00}}},
317 /* /93 */
318 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
319 0xf8, 0x00, 0x00, 0x00, 0x00}}},
320 /* /94 */
321 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
322 0xfc, 0x00, 0x00, 0x00, 0x00}}},
323 /* /95 */
324 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
325 0xfe, 0x00, 0x00, 0x00, 0x00}}},
326 /* /96 */
327 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
328 0xff, 0x00, 0x00, 0x00, 0x00}}},
329 /* /97 */
330 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
331 0xff, 0x80, 0x00, 0x00, 0x00}}},
332 /* /98 */
333 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
334 0xff, 0xc0, 0x00, 0x00, 0x00}}},
335 /* /99 */
336 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
337 0xff, 0xe0, 0x00, 0x00, 0x00}}},
338 /* /100 */
339 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
340 0xff, 0xf0, 0x00, 0x00, 0x00}}},
341 /* /101 */
342 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
343 0xff, 0xf8, 0x00, 0x00, 0x00}}},
344 /* /102 */
345 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
346 0xff, 0xfc, 0x00, 0x00, 0x00}}},
347 /* /103 */
348 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
349 0xff, 0xfe, 0x00, 0x00, 0x00}}},
350 /* /104 */
351 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
352 0xff, 0xff, 0x00, 0x00, 0x00}}},
353 /* /105 */
354 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
355 0xff, 0xff, 0x80, 0x00, 0x00}}},
356 /* /106 */
357 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
358 0xff, 0xff, 0xc0, 0x00, 0x00}}},
359 /* /107 */
360 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
361 0xff, 0xff, 0xe0, 0x00, 0x00}}},
362 /* /108 */
363 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
364 0xff, 0xff, 0xf0, 0x00, 0x00}}},
365 /* /109 */
366 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
367 0xff, 0xff, 0xf8, 0x00, 0x00}}},
368 /* /110 */
369 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
370 0xff, 0xff, 0xfc, 0x00, 0x00}}},
371 /* /111 */
372 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
373 0xff, 0xff, 0xfe, 0x00, 0x00}}},
374 /* /112 */
375 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
376 0xff, 0xff, 0xff, 0x00, 0x00}}},
377 /* /113 */
378 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
379 0xff, 0xff, 0xff, 0x80, 0x00}}},
380 /* /114 */
381 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
382 0xff, 0xff, 0xff, 0xc0, 0x00}}},
383 /* /115 */
384 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
385 0xff, 0xff, 0xff, 0xe0, 0x00}}},
386 /* /116 */
387 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
388 0xff, 0xff, 0xff, 0xf0, 0x00}}},
389 /* /117 */
390 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
391 0xff, 0xff, 0xff, 0xf8, 0x00}}},
392 /* /118 */
393 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
394 0xff, 0xff, 0xff, 0xfc, 0x00}}},
395 /* /119 */
396 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
397 0xff, 0xff, 0xff, 0xfe, 0x00}}},
398 /* /120 */
399 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
400 0xff, 0xff, 0xff, 0xff, 0x00}}},
401 /* /121 */
402 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
403 0xff, 0xff, 0xff, 0xff, 0x80}}},
404 /* /122 */
405 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
406 0xff, 0xff, 0xff, 0xff, 0xc0}}},
407 /* /123 */
408 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
409 0xff, 0xff, 0xff, 0xff, 0xe0}}},
410 /* /124 */
411 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
412 0xff, 0xff, 0xff, 0xff, 0xf0}}},
413 /* /125 */
414 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
415 0xff, 0xff, 0xff, 0xff, 0xf8}}},
416 /* /126 */
417 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
418 0xff, 0xff, 0xff, 0xff, 0xfc}}},
419 /* /127 */
420 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
421 0xff, 0xff, 0xff, 0xff, 0xfe}}},
422 /* /128 */
423 {{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
424 0xff, 0xff, 0xff, 0xff, 0xff}}}};
425
426 /* Number of bits in prefix type. */
427 #ifndef PNBBY
428 #define PNBBY 8
429 #endif /* PNBBY */
430
431 #define MASKBIT(offset) ((0xff << (PNBBY - (offset))) & 0xff)
432
433 void prefix_hexdump(const struct prefix *p)
434 {
435 char buf[PREFIX_STRLEN];
436
437 zlog_debug("prefix: %s",
438 prefix2str(p, buf, sizeof(buf)));
439 zlog_hexdump(p, sizeof(struct prefix));
440 }
441
442 int is_zero_mac(struct ethaddr *mac)
443 {
444 int i = 0;
445
446 for (i = 0; i < ETH_ALEN; i++) {
447 if (mac->octet[i])
448 return 0;
449 }
450
451 return 1;
452 }
453
454 unsigned int prefix_bit(const uint8_t *prefix, const uint8_t prefixlen)
455 {
456 unsigned int offset = prefixlen / 8;
457 unsigned int shift = 7 - (prefixlen % 8);
458
459 return (prefix[offset] >> shift) & 1;
460 }
461
462 unsigned int prefix6_bit(const struct in6_addr *prefix, const uint8_t prefixlen)
463 {
464 return prefix_bit((const uint8_t *)&prefix->s6_addr, prefixlen);
465 }
466
467 int str2family(const char *string)
468 {
469 if (!strcmp("ipv4", string))
470 return AF_INET;
471 else if (!strcmp("ipv6", string))
472 return AF_INET6;
473 else if (!strcmp("ethernet", string))
474 return AF_ETHERNET;
475 else if (!strcmp("evpn", string))
476 return AF_EVPN;
477 return -1;
478 }
479
480 const char *family2str(int family)
481 {
482 switch (family) {
483 case AF_INET:
484 return "IPv4";
485 case AF_INET6:
486 return "IPv6";
487 case AF_ETHERNET:
488 return "Ethernet";
489 case AF_EVPN:
490 return "Evpn";
491 }
492 return "?";
493 }
494
495 /* Address Famiy Identifier to Address Family converter. */
496 int afi2family(afi_t afi)
497 {
498 if (afi == AFI_IP)
499 return AF_INET;
500 else if (afi == AFI_IP6)
501 return AF_INET6;
502 else if (afi == AFI_L2VPN)
503 return AF_ETHERNET;
504 /* NOTE: EVPN code should NOT use this interface. */
505 return 0;
506 }
507
508 afi_t family2afi(int family)
509 {
510 if (family == AF_INET)
511 return AFI_IP;
512 else if (family == AF_INET6)
513 return AFI_IP6;
514 else if (family == AF_ETHERNET || family == AF_EVPN)
515 return AFI_L2VPN;
516 return 0;
517 }
518
519 const char *afi2str(afi_t afi)
520 {
521 switch (afi) {
522 case AFI_IP:
523 return "IPv4";
524 case AFI_IP6:
525 return "IPv6";
526 case AFI_L2VPN:
527 return "l2vpn";
528 case AFI_MAX:
529 return "bad-value";
530 default:
531 break;
532 }
533 return NULL;
534 }
535
536 const char *safi2str(safi_t safi)
537 {
538 switch (safi) {
539 case SAFI_UNICAST:
540 return "unicast";
541 case SAFI_MULTICAST:
542 return "multicast";
543 case SAFI_MPLS_VPN:
544 return "vpn";
545 case SAFI_ENCAP:
546 return "encap";
547 case SAFI_EVPN:
548 return "evpn";
549 case SAFI_LABELED_UNICAST:
550 return "labeled-unicast";
551 case SAFI_FLOWSPEC:
552 return "flowspec";
553 default:
554 return "unknown";
555 }
556 }
557
558 /* If n includes p prefix then return 1 else return 0. */
559 int prefix_match(const struct prefix *n, const struct prefix *p)
560 {
561 int offset;
562 int shift;
563 const uint8_t *np, *pp;
564
565 /* If n's prefix is longer than p's one return 0. */
566 if (n->prefixlen > p->prefixlen)
567 return 0;
568
569 if (n->family == AF_FLOWSPEC) {
570 /* prefixlen is unused. look at fs prefix len */
571 if (n->u.prefix_flowspec.prefixlen >
572 p->u.prefix_flowspec.prefixlen)
573 return 0;
574
575 /* Set both prefix's head pointer. */
576 np = (const uint8_t *)&n->u.prefix_flowspec.ptr;
577 pp = (const uint8_t *)&p->u.prefix_flowspec.ptr;
578
579 offset = n->u.prefix_flowspec.prefixlen;
580
581 while (offset--)
582 if (np[offset] != pp[offset])
583 return 0;
584 return 1;
585 }
586
587 /* Set both prefix's head pointer. */
588 np = n->u.val;
589 pp = p->u.val;
590
591 offset = n->prefixlen / PNBBY;
592 shift = n->prefixlen % PNBBY;
593
594 if (shift)
595 if (maskbit[shift] & (np[offset] ^ pp[offset]))
596 return 0;
597
598 while (offset--)
599 if (np[offset] != pp[offset])
600 return 0;
601 return 1;
602 }
603
604 /* If n includes p then return 1 else return 0. Prefix mask is not considered */
605 int prefix_match_network_statement(const struct prefix *n,
606 const struct prefix *p)
607 {
608 int offset;
609 int shift;
610 const uint8_t *np, *pp;
611
612 /* Set both prefix's head pointer. */
613 np = n->u.val;
614 pp = p->u.val;
615
616 offset = n->prefixlen / PNBBY;
617 shift = n->prefixlen % PNBBY;
618
619 if (shift)
620 if (maskbit[shift] & (np[offset] ^ pp[offset]))
621 return 0;
622
623 while (offset--)
624 if (np[offset] != pp[offset])
625 return 0;
626 return 1;
627 }
628
629 void prefix_copy(struct prefix *dest, const struct prefix *src)
630 {
631 dest->family = src->family;
632 dest->prefixlen = src->prefixlen;
633
634 if (src->family == AF_INET)
635 dest->u.prefix4 = src->u.prefix4;
636 else if (src->family == AF_INET6)
637 dest->u.prefix6 = src->u.prefix6;
638 else if (src->family == AF_ETHERNET) {
639 memcpy(&dest->u.prefix_eth, &src->u.prefix_eth,
640 sizeof(struct ethaddr));
641 } else if (src->family == AF_EVPN) {
642 memcpy(&dest->u.prefix_evpn, &src->u.prefix_evpn,
643 sizeof(struct evpn_addr));
644 } else if (src->family == AF_UNSPEC) {
645 dest->u.lp.id = src->u.lp.id;
646 dest->u.lp.adv_router = src->u.lp.adv_router;
647 } else if (src->family == AF_FLOWSPEC) {
648 void *temp;
649 int len;
650
651 len = src->u.prefix_flowspec.prefixlen;
652 dest->u.prefix_flowspec.prefixlen =
653 src->u.prefix_flowspec.prefixlen;
654 dest->family = src->family;
655 temp = XCALLOC(MTYPE_PREFIX_FLOWSPEC, len);
656 dest->u.prefix_flowspec.ptr = (uintptr_t)temp;
657 memcpy((void *)dest->u.prefix_flowspec.ptr,
658 (void *)src->u.prefix_flowspec.ptr, len);
659 } else {
660 flog_err(EC_LIB_DEVELOPMENT,
661 "prefix_copy(): Unknown address family %d",
662 src->family);
663 assert(0);
664 }
665 }
666
667 /*
668 * Return 1 if the address/netmask contained in the prefix structure
669 * is the same, and else return 0. For this routine, 'same' requires
670 * that not only the prefix length and the network part be the same,
671 * but also the host part. Thus, 10.0.0.1/8 and 10.0.0.2/8 are not
672 * the same. Note that this routine has the same return value sense
673 * as '==' (which is different from prefix_cmp).
674 */
675 int prefix_same(const struct prefix *p1, const struct prefix *p2)
676 {
677 if ((p1 && !p2) || (!p1 && p2))
678 return 0;
679
680 if (!p1 && !p2)
681 return 1;
682
683 if (p1->family == p2->family && p1->prefixlen == p2->prefixlen) {
684 if (p1->family == AF_INET)
685 if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4))
686 return 1;
687 if (p1->family == AF_INET6)
688 if (IPV6_ADDR_SAME(&p1->u.prefix6.s6_addr,
689 &p2->u.prefix6.s6_addr))
690 return 1;
691 if (p1->family == AF_ETHERNET)
692 if (!memcmp(&p1->u.prefix_eth, &p2->u.prefix_eth,
693 sizeof(struct ethaddr)))
694 return 1;
695 if (p1->family == AF_EVPN)
696 if (!memcmp(&p1->u.prefix_evpn, &p2->u.prefix_evpn,
697 sizeof(struct evpn_addr)))
698 return 1;
699 if (p1->family == AF_FLOWSPEC) {
700 if (p1->u.prefix_flowspec.prefixlen !=
701 p2->u.prefix_flowspec.prefixlen)
702 return 0;
703 if (!memcmp(&p1->u.prefix_flowspec.ptr,
704 &p2->u.prefix_flowspec.ptr,
705 p2->u.prefix_flowspec.prefixlen))
706 return 1;
707 }
708 }
709 return 0;
710 }
711
712 /*
713 * Return 0 if the network prefixes represented by the struct prefix
714 * arguments are the same prefix, and 1 otherwise. Network prefixes
715 * are considered the same if the prefix lengths are equal and the
716 * network parts are the same. Host bits (which are considered masked
717 * by the prefix length) are not significant. Thus, 10.0.0.1/8 and
718 * 10.0.0.2/8 are considered equivalent by this routine. Note that
719 * this routine has the same return sense as strcmp (which is different
720 * from prefix_same).
721 */
722 int prefix_cmp(const struct prefix *p1, const struct prefix *p2)
723 {
724 int offset;
725 int shift;
726
727 /* Set both prefix's head pointer. */
728 const uint8_t *pp1;
729 const uint8_t *pp2;
730
731 if (p1->family != p2->family)
732 return 1;
733 if (p1->family == AF_FLOWSPEC) {
734 pp1 = (const uint8_t *)p1->u.prefix_flowspec.ptr;
735 pp2 = (const uint8_t *)p2->u.prefix_flowspec.ptr;
736
737 if (p1->u.prefix_flowspec.prefixlen !=
738 p2->u.prefix_flowspec.prefixlen)
739 return 1;
740
741 offset = p1->u.prefix_flowspec.prefixlen;
742 while (offset--)
743 if (pp1[offset] != pp2[offset])
744 return 1;
745 return 0;
746 }
747 pp1 = p1->u.val;
748 pp2 = p2->u.val;
749
750 if (p1->prefixlen != p2->prefixlen)
751 return 1;
752 offset = p1->prefixlen / PNBBY;
753 shift = p1->prefixlen % PNBBY;
754
755 if (shift)
756 if (maskbit[shift] & (pp1[offset] ^ pp2[offset]))
757 return 1;
758
759 while (offset--)
760 if (pp1[offset] != pp2[offset])
761 return 1;
762
763 return 0;
764 }
765
766 /*
767 * Count the number of common bits in 2 prefixes. The prefix length is
768 * ignored for this function; the whole prefix is compared. If the prefix
769 * address families don't match, return -1; otherwise the return value is
770 * in range 0 ... maximum prefix length for the address family.
771 */
772 int prefix_common_bits(const struct prefix *p1, const struct prefix *p2)
773 {
774 int pos, bit;
775 int length = 0;
776 uint8_t xor ;
777
778 /* Set both prefix's head pointer. */
779 const uint8_t *pp1 = p1->u.val;
780 const uint8_t *pp2 = p2->u.val;
781
782 if (p1->family == AF_INET)
783 length = IPV4_MAX_BYTELEN;
784 if (p1->family == AF_INET6)
785 length = IPV6_MAX_BYTELEN;
786 if (p1->family == AF_ETHERNET)
787 length = ETH_ALEN;
788 if (p1->family == AF_EVPN)
789 length = 8 * sizeof(struct evpn_addr);
790
791 if (p1->family != p2->family || !length)
792 return -1;
793
794 for (pos = 0; pos < length; pos++)
795 if (pp1[pos] != pp2[pos])
796 break;
797 if (pos == length)
798 return pos * 8;
799
800 xor = pp1[pos] ^ pp2[pos];
801 for (bit = 0; bit < 8; bit++)
802 if (xor&(1 << (7 - bit)))
803 break;
804
805 return pos * 8 + bit;
806 }
807
808 /* Return prefix family type string. */
809 const char *prefix_family_str(const struct prefix *p)
810 {
811 if (p->family == AF_INET)
812 return "inet";
813 if (p->family == AF_INET6)
814 return "inet6";
815 if (p->family == AF_ETHERNET)
816 return "ether";
817 if (p->family == AF_EVPN)
818 return "evpn";
819 return "unspec";
820 }
821
822 /* Allocate new prefix_ipv4 structure. */
823 struct prefix_ipv4 *prefix_ipv4_new()
824 {
825 struct prefix_ipv4 *p;
826
827 /* Call prefix_new to allocate a full-size struct prefix to avoid
828 problems
829 where the struct prefix_ipv4 is cast to struct prefix and unallocated
830 bytes were being referenced (e.g. in structure assignments). */
831 p = (struct prefix_ipv4 *)prefix_new();
832 p->family = AF_INET;
833 return p;
834 }
835
836 /* Free prefix_ipv4 structure. */
837 void prefix_ipv4_free(struct prefix_ipv4 *p)
838 {
839 prefix_free((struct prefix *)p);
840 }
841
842 /* When string format is invalid return 0. */
843 int str2prefix_ipv4(const char *str, struct prefix_ipv4 *p)
844 {
845 int ret;
846 int plen;
847 char *pnt;
848 char *cp;
849
850 /* Find slash inside string. */
851 pnt = strchr(str, '/');
852
853 /* String doesn't contail slash. */
854 if (pnt == NULL) {
855 /* Convert string to prefix. */
856 ret = inet_pton(AF_INET, str, &p->prefix);
857 if (ret == 0)
858 return 0;
859
860 /* If address doesn't contain slash we assume it host address.
861 */
862 p->family = AF_INET;
863 p->prefixlen = IPV4_MAX_BITLEN;
864
865 return ret;
866 } else {
867 cp = XMALLOC(MTYPE_TMP, (pnt - str) + 1);
868 strncpy(cp, str, pnt - str);
869 *(cp + (pnt - str)) = '\0';
870 ret = inet_aton(cp, &p->prefix);
871 XFREE(MTYPE_TMP, cp);
872
873 /* Get prefix length. */
874 plen = (uint8_t)atoi(++pnt);
875 if (plen > IPV4_MAX_PREFIXLEN)
876 return 0;
877
878 p->family = AF_INET;
879 p->prefixlen = plen;
880 }
881
882 return ret;
883 }
884
885 /* When string format is invalid return 0. */
886 int str2prefix_eth(const char *str, struct prefix_eth *p)
887 {
888 int ret = 0;
889 int plen = 48;
890 char *pnt;
891 char *cp = NULL;
892 const char *str_addr = str;
893 unsigned int a[6];
894 int i;
895 bool slash = false;
896
897 if (!strcmp(str, "any")) {
898 memset(p, 0, sizeof(*p));
899 p->family = AF_ETHERNET;
900 return 1;
901 }
902
903 /* Find slash inside string. */
904 pnt = strchr(str, '/');
905
906 if (pnt) {
907 /* Get prefix length. */
908 plen = (uint8_t)atoi(++pnt);
909 if (plen > 48) {
910 ret = 0;
911 goto done;
912 }
913
914 cp = XMALLOC(MTYPE_TMP, (pnt - str) + 1);
915 strncpy(cp, str, pnt - str);
916 *(cp + (pnt - str)) = '\0';
917
918 str_addr = cp;
919 slash = true;
920 }
921
922 /* Convert string to prefix. */
923 if (sscanf(str_addr, "%2x:%2x:%2x:%2x:%2x:%2x", a + 0, a + 1, a + 2,
924 a + 3, a + 4, a + 5)
925 != 6) {
926 ret = 0;
927 goto done;
928 }
929 for (i = 0; i < 6; ++i) {
930 p->eth_addr.octet[i] = a[i] & 0xff;
931 }
932 p->prefixlen = plen;
933 p->family = AF_ETHERNET;
934
935 /*
936 * special case to allow old configurations to work
937 * Since all zero's is implicitly meant to allow
938 * a comparison to zero, let's assume
939 */
940 if (!slash && is_zero_mac(&(p->eth_addr)))
941 p->prefixlen = 0;
942
943 ret = 1;
944
945 done:
946 if (cp)
947 XFREE(MTYPE_TMP, cp);
948
949 return ret;
950 }
951
952 /* Convert masklen into IP address's netmask (network byte order). */
953 void masklen2ip(const int masklen, struct in_addr *netmask)
954 {
955 assert(masklen >= 0 && masklen <= IPV4_MAX_BITLEN);
956
957 /* left shift is only defined for less than the size of the type.
958 * we unconditionally use long long in case the target platform
959 * has defined behaviour for << 32 (or has a 64-bit left shift) */
960
961 if (sizeof(unsigned long long) > 4)
962 netmask->s_addr = htonl(0xffffffffULL << (32 - masklen));
963 else
964 netmask->s_addr =
965 htonl(masklen ? 0xffffffffU << (32 - masklen) : 0);
966 }
967
968 /* Convert IP address's netmask into integer. We assume netmask is
969 sequential one. Argument netmask should be network byte order. */
970 uint8_t ip_masklen(struct in_addr netmask)
971 {
972 uint32_t tmp = ~ntohl(netmask.s_addr);
973 if (tmp)
974 /* clz: count leading zeroes. sadly, the behaviour of this
975 * builtin
976 * is undefined for a 0 argument, even though most CPUs give 32
977 */
978 return __builtin_clz(tmp);
979 else
980 return 32;
981 }
982
983 /* Apply mask to IPv4 prefix (network byte order). */
984 void apply_mask_ipv4(struct prefix_ipv4 *p)
985 {
986 struct in_addr mask;
987 masklen2ip(p->prefixlen, &mask);
988 p->prefix.s_addr &= mask.s_addr;
989 }
990
991 /* If prefix is 0.0.0.0/0 then return 1 else return 0. */
992 int prefix_ipv4_any(const struct prefix_ipv4 *p)
993 {
994 return (p->prefix.s_addr == 0 && p->prefixlen == 0);
995 }
996
997 /* Allocate a new ip version 6 route */
998 struct prefix_ipv6 *prefix_ipv6_new(void)
999 {
1000 struct prefix_ipv6 *p;
1001
1002 /* Allocate a full-size struct prefix to avoid problems with structure
1003 size mismatches. */
1004 p = (struct prefix_ipv6 *)prefix_new();
1005 p->family = AF_INET6;
1006 return p;
1007 }
1008
1009 /* Free prefix for IPv6. */
1010 void prefix_ipv6_free(struct prefix_ipv6 *p)
1011 {
1012 prefix_free((struct prefix *)p);
1013 }
1014
1015 /* If given string is valid return pin6 else return NULL */
1016 int str2prefix_ipv6(const char *str, struct prefix_ipv6 *p)
1017 {
1018 char *pnt;
1019 char *cp;
1020 int ret;
1021
1022 pnt = strchr(str, '/');
1023
1024 /* If string doesn't contain `/' treat it as host route. */
1025 if (pnt == NULL) {
1026 ret = inet_pton(AF_INET6, str, &p->prefix);
1027 if (ret == 0)
1028 return 0;
1029 p->prefixlen = IPV6_MAX_BITLEN;
1030 } else {
1031 int plen;
1032
1033 cp = XMALLOC(MTYPE_TMP, (pnt - str) + 1);
1034 strncpy(cp, str, pnt - str);
1035 *(cp + (pnt - str)) = '\0';
1036 ret = inet_pton(AF_INET6, cp, &p->prefix);
1037 XFREE(MTYPE_TMP, cp);
1038 if (ret == 0)
1039 return 0;
1040 plen = (uint8_t)atoi(++pnt);
1041 if (plen > IPV6_MAX_BITLEN)
1042 return 0;
1043 p->prefixlen = plen;
1044 }
1045 p->family = AF_INET6;
1046
1047 return ret;
1048 }
1049
1050 /* Convert struct in6_addr netmask into integer.
1051 * FIXME return uint8_t as ip_maskleni() does. */
1052 int ip6_masklen(struct in6_addr netmask)
1053 {
1054 int len = 0;
1055 unsigned char val;
1056 unsigned char *pnt;
1057
1058 pnt = (unsigned char *)&netmask;
1059
1060 while ((*pnt == 0xff) && len < IPV6_MAX_BITLEN) {
1061 len += 8;
1062 pnt++;
1063 }
1064
1065 if (len < IPV6_MAX_BITLEN) {
1066 val = *pnt;
1067 while (val) {
1068 len++;
1069 val <<= 1;
1070 }
1071 }
1072 return len;
1073 }
1074
1075 void masklen2ip6(const int masklen, struct in6_addr *netmask)
1076 {
1077 assert(masklen >= 0 && masklen <= IPV6_MAX_BITLEN);
1078 memcpy(netmask, maskbytes6 + masklen, sizeof(struct in6_addr));
1079 }
1080
1081 void apply_mask_ipv6(struct prefix_ipv6 *p)
1082 {
1083 uint8_t *pnt;
1084 int index;
1085 int offset;
1086
1087 index = p->prefixlen / 8;
1088
1089 if (index < 16) {
1090 pnt = (uint8_t *)&p->prefix;
1091 offset = p->prefixlen % 8;
1092
1093 pnt[index] &= maskbit[offset];
1094 index++;
1095
1096 while (index < 16)
1097 pnt[index++] = 0;
1098 }
1099 }
1100
1101 void apply_mask(struct prefix *p)
1102 {
1103 switch (p->family) {
1104 case AF_INET:
1105 apply_mask_ipv4((struct prefix_ipv4 *)p);
1106 break;
1107 case AF_INET6:
1108 apply_mask_ipv6((struct prefix_ipv6 *)p);
1109 break;
1110 default:
1111 break;
1112 }
1113 return;
1114 }
1115
1116 /* Utility function of convert between struct prefix <=> union sockunion.
1117 * FIXME This function isn't used anywhere. */
1118 struct prefix *sockunion2prefix(const union sockunion *dest,
1119 const union sockunion *mask)
1120 {
1121 if (dest->sa.sa_family == AF_INET) {
1122 struct prefix_ipv4 *p;
1123
1124 p = prefix_ipv4_new();
1125 p->family = AF_INET;
1126 p->prefix = dest->sin.sin_addr;
1127 p->prefixlen = ip_masklen(mask->sin.sin_addr);
1128 return (struct prefix *)p;
1129 }
1130 if (dest->sa.sa_family == AF_INET6) {
1131 struct prefix_ipv6 *p;
1132
1133 p = prefix_ipv6_new();
1134 p->family = AF_INET6;
1135 p->prefixlen = ip6_masklen(mask->sin6.sin6_addr);
1136 memcpy(&p->prefix, &dest->sin6.sin6_addr,
1137 sizeof(struct in6_addr));
1138 return (struct prefix *)p;
1139 }
1140 return NULL;
1141 }
1142
1143 /* Utility function of convert between struct prefix <=> union sockunion. */
1144 struct prefix *sockunion2hostprefix(const union sockunion *su,
1145 struct prefix *prefix)
1146 {
1147 if (su->sa.sa_family == AF_INET) {
1148 struct prefix_ipv4 *p;
1149
1150 p = prefix ? (struct prefix_ipv4 *)prefix : prefix_ipv4_new();
1151 p->family = AF_INET;
1152 p->prefix = su->sin.sin_addr;
1153 p->prefixlen = IPV4_MAX_BITLEN;
1154 return (struct prefix *)p;
1155 }
1156 if (su->sa.sa_family == AF_INET6) {
1157 struct prefix_ipv6 *p;
1158
1159 p = prefix ? (struct prefix_ipv6 *)prefix : prefix_ipv6_new();
1160 p->family = AF_INET6;
1161 p->prefixlen = IPV6_MAX_BITLEN;
1162 memcpy(&p->prefix, &su->sin6.sin6_addr,
1163 sizeof(struct in6_addr));
1164 return (struct prefix *)p;
1165 }
1166 return NULL;
1167 }
1168
1169 void prefix2sockunion(const struct prefix *p, union sockunion *su)
1170 {
1171 memset(su, 0, sizeof(*su));
1172
1173 su->sa.sa_family = p->family;
1174 if (p->family == AF_INET)
1175 su->sin.sin_addr = p->u.prefix4;
1176 if (p->family == AF_INET6)
1177 memcpy(&su->sin6.sin6_addr, &p->u.prefix6,
1178 sizeof(struct in6_addr));
1179 }
1180
1181 int prefix_blen(const struct prefix *p)
1182 {
1183 switch (p->family) {
1184 case AF_INET:
1185 return IPV4_MAX_BYTELEN;
1186 break;
1187 case AF_INET6:
1188 return IPV6_MAX_BYTELEN;
1189 break;
1190 case AF_ETHERNET:
1191 return ETH_ALEN;
1192 break;
1193 }
1194 return 0;
1195 }
1196
1197 /* Generic function for conversion string to struct prefix. */
1198 int str2prefix(const char *str, struct prefix *p)
1199 {
1200 int ret;
1201
1202 if (!str || !p)
1203 return 0;
1204
1205 /* First we try to convert string to struct prefix_ipv4. */
1206 ret = str2prefix_ipv4(str, (struct prefix_ipv4 *)p);
1207 if (ret)
1208 return ret;
1209
1210 /* Next we try to convert string to struct prefix_ipv6. */
1211 ret = str2prefix_ipv6(str, (struct prefix_ipv6 *)p);
1212 if (ret)
1213 return ret;
1214
1215 /* Next we try to convert string to struct prefix_eth. */
1216 ret = str2prefix_eth(str, (struct prefix_eth *)p);
1217 if (ret)
1218 return ret;
1219
1220 return 0;
1221 }
1222
1223 static const char *prefixevpn_ead2str(const struct prefix_evpn *p, char *str,
1224 int size)
1225 {
1226 snprintf(str, size, "Unsupported EVPN prefix");
1227 return str;
1228 }
1229
1230 static const char *prefixevpn_macip2str(const struct prefix_evpn *p, char *str,
1231 int size)
1232 {
1233 uint8_t family;
1234 char buf[PREFIX2STR_BUFFER];
1235 char buf2[ETHER_ADDR_STRLEN];
1236
1237 if (is_evpn_prefix_ipaddr_none(p))
1238 snprintf(str, size, "[%d]:[%s]/%d",
1239 p->prefix.route_type,
1240 prefix_mac2str(&p->prefix.macip_addr.mac,
1241 buf2, sizeof(buf2)),
1242 p->prefixlen);
1243 else {
1244 family = is_evpn_prefix_ipaddr_v4(p)
1245 ? AF_INET
1246 : AF_INET6;
1247 snprintf(str, size, "[%d]:[%s]:[%s]/%d",
1248 p->prefix.route_type,
1249 prefix_mac2str(&p->prefix.macip_addr.mac,
1250 buf2, sizeof(buf2)),
1251 inet_ntop(family,
1252 &p->prefix.macip_addr.ip.ip.addr,
1253 buf, PREFIX2STR_BUFFER),
1254 p->prefixlen);
1255 }
1256 return str;
1257 }
1258
1259 static const char *prefixevpn_imet2str(const struct prefix_evpn *p, char *str,
1260 int size)
1261 {
1262 uint8_t family;
1263 char buf[PREFIX2STR_BUFFER];
1264
1265 family = is_evpn_prefix_ipaddr_v4(p)
1266 ? AF_INET
1267 : AF_INET6;
1268 snprintf(str, size, "[%d]:[%s]/%d", p->prefix.route_type,
1269 inet_ntop(family,
1270 &p->prefix.imet_addr.ip.ip.addr, buf,
1271 PREFIX2STR_BUFFER),
1272 p->prefixlen);
1273 return str;
1274 }
1275
1276 static const char *prefixevpn_es2str(const struct prefix_evpn *p, char *str,
1277 int size)
1278 {
1279 char buf[ESI_STR_LEN];
1280
1281 snprintf(str, size, "[%d]:[%s]:[%s]/%d", p->prefix.route_type,
1282 esi_to_str(&p->prefix.es_addr.esi, buf, sizeof(buf)),
1283 inet_ntoa(p->prefix.es_addr.ip.ipaddr_v4),
1284 p->prefixlen);
1285 return str;
1286 }
1287
1288 static const char *prefixevpn_prefix2str(const struct prefix_evpn *p, char *str,
1289 int size)
1290 {
1291 uint8_t family;
1292 char buf[PREFIX2STR_BUFFER];
1293
1294 family = is_evpn_prefix_ipaddr_v4(p)
1295 ? AF_INET
1296 : AF_INET6;
1297 snprintf(str, size, "[%d]:[%u][%s/%d]/%d",
1298 p->prefix.route_type,
1299 p->prefix.prefix_addr.eth_tag,
1300 inet_ntop(family,
1301 &p->prefix.prefix_addr.ip.ip.addr, buf,
1302 PREFIX2STR_BUFFER),
1303 p->prefix.prefix_addr.ip_prefix_length,
1304 p->prefixlen);
1305 return str;
1306 }
1307
1308 static const char *prefixevpn2str(const struct prefix_evpn *p, char *str,
1309 int size)
1310 {
1311 switch (p->prefix.route_type) {
1312 case 1:
1313 return prefixevpn_ead2str(p, str, size);
1314 case 2:
1315 return prefixevpn_macip2str(p, str, size);
1316 case 3:
1317 return prefixevpn_imet2str(p, str, size);
1318 case 4:
1319 return prefixevpn_es2str(p, str, size);
1320 case 5:
1321 return prefixevpn_prefix2str(p, str, size);
1322 default:
1323 snprintf(str, size, "Unsupported EVPN prefix");
1324 break;
1325 }
1326 return str;
1327 }
1328
1329 const char *prefix2str(union prefixconstptr pu, char *str, int size)
1330 {
1331 const struct prefix *p = pu.p;
1332 char buf[PREFIX2STR_BUFFER];
1333
1334 switch (p->family) {
1335 case AF_INET:
1336 case AF_INET6:
1337 snprintf(str, size, "%s/%d", inet_ntop(p->family, &p->u.prefix,
1338 buf, PREFIX2STR_BUFFER),
1339 p->prefixlen);
1340 break;
1341
1342 case AF_ETHERNET:
1343 snprintf(str, size, "%s/%d",
1344 prefix_mac2str(&p->u.prefix_eth, buf, sizeof(buf)),
1345 p->prefixlen);
1346 break;
1347
1348 case AF_EVPN:
1349 prefixevpn2str((const struct prefix_evpn *)p, str, size);
1350 break;
1351
1352 case AF_FLOWSPEC:
1353 sprintf(str, "FS prefix");
1354 break;
1355
1356 default:
1357 sprintf(str, "UNK prefix");
1358 break;
1359 }
1360
1361 return str;
1362 }
1363
1364 struct prefix *prefix_new()
1365 {
1366 struct prefix *p;
1367
1368 p = XCALLOC(MTYPE_PREFIX, sizeof *p);
1369 return p;
1370 }
1371
1372 /* Free prefix structure. */
1373 void prefix_free(struct prefix *p)
1374 {
1375 XFREE(MTYPE_PREFIX, p);
1376 }
1377
1378 /* Utility function to convert ipv4 prefixes to Classful prefixes */
1379 void apply_classful_mask_ipv4(struct prefix_ipv4 *p)
1380 {
1381
1382 uint32_t destination;
1383
1384 destination = ntohl(p->prefix.s_addr);
1385
1386 if (p->prefixlen == IPV4_MAX_PREFIXLEN)
1387 ;
1388 /* do nothing for host routes */
1389 else if (IN_CLASSC(destination)) {
1390 p->prefixlen = 24;
1391 apply_mask_ipv4(p);
1392 } else if (IN_CLASSB(destination)) {
1393 p->prefixlen = 16;
1394 apply_mask_ipv4(p);
1395 } else {
1396 p->prefixlen = 8;
1397 apply_mask_ipv4(p);
1398 }
1399 }
1400
1401 in_addr_t ipv4_network_addr(in_addr_t hostaddr, int masklen)
1402 {
1403 struct in_addr mask;
1404
1405 masklen2ip(masklen, &mask);
1406 return hostaddr & mask.s_addr;
1407 }
1408
1409 in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen)
1410 {
1411 struct in_addr mask;
1412
1413 masklen2ip(masklen, &mask);
1414 return (masklen != IPV4_MAX_PREFIXLEN - 1) ?
1415 /* normal case */
1416 (hostaddr | ~mask.s_addr)
1417 :
1418 /* special case for /31 */
1419 (hostaddr ^ ~mask.s_addr);
1420 }
1421
1422 /* Utility function to convert ipv4 netmask to prefixes
1423 ex.) "1.1.0.0" "255.255.0.0" => "1.1.0.0/16"
1424 ex.) "1.0.0.0" NULL => "1.0.0.0/8" */
1425 int netmask_str2prefix_str(const char *net_str, const char *mask_str,
1426 char *prefix_str)
1427 {
1428 struct in_addr network;
1429 struct in_addr mask;
1430 uint8_t prefixlen;
1431 uint32_t destination;
1432 int ret;
1433
1434 ret = inet_aton(net_str, &network);
1435 if (!ret)
1436 return 0;
1437
1438 if (mask_str) {
1439 ret = inet_aton(mask_str, &mask);
1440 if (!ret)
1441 return 0;
1442
1443 prefixlen = ip_masklen(mask);
1444 } else {
1445 destination = ntohl(network.s_addr);
1446
1447 if (network.s_addr == 0)
1448 prefixlen = 0;
1449 else if (IN_CLASSC(destination))
1450 prefixlen = 24;
1451 else if (IN_CLASSB(destination))
1452 prefixlen = 16;
1453 else if (IN_CLASSA(destination))
1454 prefixlen = 8;
1455 else
1456 return 0;
1457 }
1458
1459 sprintf(prefix_str, "%s/%d", net_str, prefixlen);
1460
1461 return 1;
1462 }
1463
1464 /* Utility function for making IPv6 address string. */
1465 const char *inet6_ntoa(struct in6_addr addr)
1466 {
1467 static char buf[INET6_ADDRSTRLEN];
1468
1469 inet_ntop(AF_INET6, &addr, buf, INET6_ADDRSTRLEN);
1470 return buf;
1471 }
1472
1473 /* converts to internal representation of mac address
1474 * returns 1 on success, 0 otherwise
1475 * format accepted: AA:BB:CC:DD:EE:FF
1476 * if mac parameter is null, then check only
1477 */
1478 int prefix_str2mac(const char *str, struct ethaddr *mac)
1479 {
1480 unsigned int a[6];
1481 int i;
1482
1483 if (!str)
1484 return 0;
1485
1486 if (sscanf(str, "%2x:%2x:%2x:%2x:%2x:%2x", a + 0, a + 1, a + 2, a + 3,
1487 a + 4, a + 5)
1488 != 6) {
1489 /* error in incoming str length */
1490 return 0;
1491 }
1492 /* valid mac address */
1493 if (!mac)
1494 return 1;
1495 for (i = 0; i < 6; ++i)
1496 mac->octet[i] = a[i] & 0xff;
1497 return 1;
1498 }
1499
1500 char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size)
1501 {
1502 char *ptr;
1503
1504 if (!mac)
1505 return NULL;
1506 if (!buf)
1507 ptr = (char *)XMALLOC(MTYPE_TMP,
1508 ETHER_ADDR_STRLEN * sizeof(char));
1509 else {
1510 assert(size >= ETHER_ADDR_STRLEN);
1511 ptr = buf;
1512 }
1513 snprintf(ptr, (ETHER_ADDR_STRLEN), "%02x:%02x:%02x:%02x:%02x:%02x",
1514 (uint8_t)mac->octet[0], (uint8_t)mac->octet[1],
1515 (uint8_t)mac->octet[2], (uint8_t)mac->octet[3],
1516 (uint8_t)mac->octet[4], (uint8_t)mac->octet[5]);
1517 return ptr;
1518 }
1519
1520 unsigned prefix_hash_key(void *pp)
1521 {
1522 struct prefix copy;
1523
1524 if (((struct prefix *)pp)->family == AF_FLOWSPEC) {
1525 uint32_t len;
1526 void *temp;
1527
1528 /* make sure *all* unused bits are zero,
1529 * particularly including alignment /
1530 * padding and unused prefix bytes.
1531 */
1532 memset(&copy, 0, sizeof(copy));
1533 prefix_copy(&copy, (struct prefix *)pp);
1534 len = jhash((void *)copy.u.prefix_flowspec.ptr,
1535 copy.u.prefix_flowspec.prefixlen,
1536 0x55aa5a5a);
1537 temp = (void *)copy.u.prefix_flowspec.ptr;
1538 XFREE(MTYPE_PREFIX_FLOWSPEC, temp);
1539 copy.u.prefix_flowspec.ptr = (uintptr_t)NULL;
1540 return len;
1541 }
1542 /* make sure *all* unused bits are zero, particularly including
1543 * alignment /
1544 * padding and unused prefix bytes. */
1545 memset(&copy, 0, sizeof(copy));
1546 prefix_copy(&copy, (struct prefix *)pp);
1547 return jhash(&copy,
1548 offsetof(struct prefix, u.prefix) + PSIZE(copy.prefixlen),
1549 0x55aa5a5a);
1550 }
1551
1552 /* converts to internal representation of esi
1553 * returns 1 on success, 0 otherwise
1554 * format accepted: aa:aa:aa:aa:aa:aa:aa:aa:aa:aa
1555 * if esi parameter is null, then check only
1556 */
1557 int str_to_esi(const char *str, esi_t *esi)
1558 {
1559 int i;
1560 unsigned int a[ESI_BYTES];
1561
1562 if (!str)
1563 return 0;
1564
1565 if (sscanf(str, "%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x",
1566 a + 0, a + 1, a + 2, a + 3,
1567 a + 4, a + 5, a + 6, a + 7,
1568 a + 8, a + 9)
1569 != ESI_BYTES) {
1570 /* error in incoming str length */
1571 return 0;
1572 }
1573
1574 /* valid ESI */
1575 if (!esi)
1576 return 1;
1577 for (i = 0; i < ESI_BYTES; ++i)
1578 esi->val[i] = a[i] & 0xff;
1579 return 1;
1580 }
1581
1582 char *esi_to_str(const esi_t *esi, char *buf, int size)
1583 {
1584 char *ptr;
1585
1586 if (!esi)
1587 return NULL;
1588 if (!buf)
1589 ptr = (char *)XMALLOC(MTYPE_TMP,
1590 ESI_STR_LEN * sizeof(char));
1591 else {
1592 assert(size >= ESI_STR_LEN);
1593 ptr = buf;
1594 }
1595
1596 snprintf(ptr, ESI_STR_LEN,
1597 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1598 esi->val[0], esi->val[1], esi->val[2],
1599 esi->val[3], esi->val[4], esi->val[5],
1600 esi->val[6], esi->val[7], esi->val[8],
1601 esi->val[9]);
1602 return ptr;
1603 }
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