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a5494df2 SH |
1 | /* |
2 | * iplink_vxlan.c VXLAN device support | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Stephen Hemminger <shemminger@vyatta.com | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | #include <net/if.h> | |
16 | #include <linux/ip.h> | |
17 | #include <linux/if_link.h> | |
18 | #include <arpa/inet.h> | |
19 | ||
20 | #include "rt_names.h" | |
21 | #include "utils.h" | |
22 | #include "ip_common.h" | |
23 | ||
24 | static void explain(void) | |
25 | { | |
7cfa3802 | 26 | fprintf(stderr, "Usage: ... vxlan id VNI [ { group | remote } ADDR ] [ local ADDR ]\n"); |
2d596120 | 27 | fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ dev PHYS_DEV ]\n"); |
514cdfb4 SH |
28 | fprintf(stderr, " [ dstport PORT ] [ srcport MIN MAX ]\n"); |
29 | fprintf(stderr, " [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n"); | |
1556e29d | 30 | fprintf(stderr, " [ [no]l2miss ] [ [no]l3miss ]\n"); |
c2fbc57e | 31 | fprintf(stderr, " [ ageing SECONDS ] [ maxaddress NUMBER ]\n"); |
a5494df2 SH |
32 | fprintf(stderr, "\n"); |
33 | fprintf(stderr, "Where: VNI := 0-16777215\n"); | |
34 | fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); | |
35 | fprintf(stderr, " TOS := { NUMBER | inherit }\n"); | |
36 | fprintf(stderr, " TTL := { 1..255 | inherit }\n"); | |
37 | } | |
38 | ||
39 | static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv, | |
40 | struct nlmsghdr *n) | |
41 | { | |
42 | __u32 vni = 0; | |
43 | int vni_set = 0; | |
44 | __u32 saddr = 0; | |
45 | __u32 gaddr = 0; | |
7cfa3802 | 46 | __u32 daddr = 0; |
aa574cd6 WC |
47 | struct in6_addr saddr6 = IN6ADDR_ANY_INIT; |
48 | struct in6_addr gaddr6 = IN6ADDR_ANY_INIT; | |
49 | struct in6_addr daddr6 = IN6ADDR_ANY_INIT; | |
a5494df2 SH |
50 | unsigned link = 0; |
51 | __u8 tos = 0; | |
52 | __u8 ttl = 0; | |
53 | __u8 learning = 1; | |
1556e29d DS |
54 | __u8 proxy = 0; |
55 | __u8 rsc = 0; | |
56 | __u8 l2miss = 0; | |
57 | __u8 l3miss = 0; | |
a5494df2 SH |
58 | __u8 noage = 0; |
59 | __u32 age = 0; | |
60 | __u32 maxaddr = 0; | |
514cdfb4 SH |
61 | __u16 dstport = 0; |
62 | int dst_port_set = 0; | |
2d596120 | 63 | struct ifla_vxlan_port_range range = { 0, 0 }; |
a5494df2 SH |
64 | |
65 | while (argc > 0) { | |
66 | if (!matches(*argv, "id") || | |
67 | !matches(*argv, "vni")) { | |
68 | NEXT_ARG(); | |
69 | if (get_u32(&vni, *argv, 0) || | |
70 | vni >= 1u << 24) | |
71 | invarg("invalid id", *argv); | |
72 | vni_set = 1; | |
73 | } else if (!matches(*argv, "group")) { | |
74 | NEXT_ARG(); | |
aa574cd6 WC |
75 | if (!inet_get_addr(*argv, &gaddr, &gaddr6)) { |
76 | fprintf(stderr, "Invalid address \"%s\"\n", *argv); | |
77 | return -1; | |
78 | } | |
79 | if (!IN6_IS_ADDR_MULTICAST(&gaddr6) && !IN_MULTICAST(ntohl(gaddr))) | |
7cfa3802 AW |
80 | invarg("invalid group address", *argv); |
81 | } else if (!matches(*argv, "remote")) { | |
82 | NEXT_ARG(); | |
aa574cd6 WC |
83 | if (!inet_get_addr(*argv, &daddr, &daddr6)) { |
84 | fprintf(stderr, "Invalid address \"%s\"\n", *argv); | |
85 | return -1; | |
86 | } | |
87 | if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr))) | |
7cfa3802 | 88 | invarg("invalid remote address", *argv); |
a5494df2 SH |
89 | } else if (!matches(*argv, "local")) { |
90 | NEXT_ARG(); | |
aa574cd6 WC |
91 | if (strcmp(*argv, "any")) { |
92 | if (!inet_get_addr(*argv, &saddr, &saddr6)) { | |
93 | fprintf(stderr, "Invalid address \"%s\"\n", *argv); | |
94 | return -1; | |
95 | } | |
96 | } | |
97 | ||
98 | if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6)) | |
a5494df2 SH |
99 | invarg("invalid local address", *argv); |
100 | } else if (!matches(*argv, "dev")) { | |
101 | NEXT_ARG(); | |
102 | link = if_nametoindex(*argv); | |
0cb6bb51 CW |
103 | if (link == 0) { |
104 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
105 | *argv); | |
a5494df2 | 106 | exit(-1); |
0cb6bb51 | 107 | } |
a5494df2 SH |
108 | } else if (!matches(*argv, "ttl") || |
109 | !matches(*argv, "hoplimit")) { | |
110 | unsigned uval; | |
111 | ||
112 | NEXT_ARG(); | |
113 | if (strcmp(*argv, "inherit") != 0) { | |
114 | if (get_unsigned(&uval, *argv, 0)) | |
2d596120 | 115 | invarg("invalid TTL", *argv); |
a5494df2 | 116 | if (uval > 255) |
2d596120 | 117 | invarg("TTL must be <= 255", *argv); |
a5494df2 SH |
118 | ttl = uval; |
119 | } | |
120 | } else if (!matches(*argv, "tos") || | |
121 | !matches(*argv, "dsfield")) { | |
122 | __u32 uval; | |
123 | ||
124 | NEXT_ARG(); | |
125 | if (strcmp(*argv, "inherit") != 0) { | |
126 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
127 | invarg("bad TOS value", *argv); | |
128 | tos = uval; | |
129 | } else | |
130 | tos = 1; | |
131 | } else if (!matches(*argv, "ageing")) { | |
132 | NEXT_ARG(); | |
133 | if (strcmp(*argv, "none") == 0) | |
134 | noage = 1; | |
135 | else if (get_u32(&age, *argv, 0)) | |
2d596120 | 136 | invarg("ageing timer", *argv); |
a5494df2 SH |
137 | } else if (!matches(*argv, "maxaddress")) { |
138 | NEXT_ARG(); | |
139 | if (strcmp(*argv, "unlimited") == 0) | |
140 | maxaddr = 0; | |
141 | else if (get_u32(&maxaddr, *argv, 0)) | |
2d596120 | 142 | invarg("max addresses", *argv); |
514cdfb4 SH |
143 | } else if (!matches(*argv, "port") || |
144 | !matches(*argv, "srcport")) { | |
2d596120 SH |
145 | __u16 minport, maxport; |
146 | NEXT_ARG(); | |
147 | if (get_u16(&minport, *argv, 0)) | |
148 | invarg("min port", *argv); | |
149 | NEXT_ARG(); | |
150 | if (get_u16(&maxport, *argv, 0)) | |
151 | invarg("max port", *argv); | |
152 | range.low = htons(minport); | |
153 | range.high = htons(maxport); | |
514cdfb4 SH |
154 | } else if (!matches(*argv, "dstport")){ |
155 | NEXT_ARG(); | |
156 | if (get_u16(&dstport, *argv, 0)) | |
157 | invarg("dst port", *argv); | |
158 | dst_port_set = 1; | |
a5494df2 SH |
159 | } else if (!matches(*argv, "nolearning")) { |
160 | learning = 0; | |
161 | } else if (!matches(*argv, "learning")) { | |
162 | learning = 1; | |
1556e29d DS |
163 | } else if (!matches(*argv, "noproxy")) { |
164 | proxy = 0; | |
165 | } else if (!matches(*argv, "proxy")) { | |
166 | proxy = 1; | |
167 | } else if (!matches(*argv, "norsc")) { | |
168 | rsc = 0; | |
169 | } else if (!matches(*argv, "rsc")) { | |
170 | rsc = 1; | |
171 | } else if (!matches(*argv, "nol2miss")) { | |
172 | l2miss = 0; | |
173 | } else if (!matches(*argv, "l2miss")) { | |
174 | l2miss = 1; | |
175 | } else if (!matches(*argv, "nol3miss")) { | |
176 | l3miss = 0; | |
177 | } else if (!matches(*argv, "l3miss")) { | |
178 | l3miss = 1; | |
a5494df2 SH |
179 | } else if (matches(*argv, "help") == 0) { |
180 | explain(); | |
181 | return -1; | |
182 | } else { | |
14645ec2 | 183 | fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv); |
a5494df2 SH |
184 | explain(); |
185 | return -1; | |
186 | } | |
187 | argc--, argv++; | |
188 | } | |
2a126a85 | 189 | |
a5494df2 SH |
190 | if (!vni_set) { |
191 | fprintf(stderr, "vxlan: missing virtual network identifier\n"); | |
192 | return -1; | |
193 | } | |
514cdfb4 | 194 | |
aa574cd6 WC |
195 | if ((gaddr && daddr) || |
196 | (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) && | |
197 | memcmp(&daddr6, &in6addr_any, sizeof(daddr6)))) { | |
7cfa3802 AW |
198 | fprintf(stderr, "vxlan: both group and remote cannot be specified\n"); |
199 | return -1; | |
200 | } | |
514cdfb4 SH |
201 | |
202 | if (!dst_port_set) { | |
203 | fprintf(stderr, "vxlan: destination port not specified\n" | |
204 | "Will use Linux kernel default (non-standard value)\n"); | |
0612519e | 205 | fprintf(stderr, |
514cdfb4 SH |
206 | "Use 'dstport 4789' to get the IANA assigned value\n" |
207 | "Use 'dstport 0' to get default and quiet this message\n"); | |
208 | } | |
209 | ||
a5494df2 | 210 | addattr32(n, 1024, IFLA_VXLAN_ID, vni); |
b64da5a5 SH |
211 | if (gaddr) |
212 | addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4); | |
7cfa3802 AW |
213 | else if (daddr) |
214 | addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4); | |
aa574cd6 WC |
215 | if (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) != 0) |
216 | addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &gaddr6, sizeof(struct in6_addr)); | |
217 | else if (memcmp(&daddr6, &in6addr_any, sizeof(daddr6)) != 0) | |
218 | addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr)); | |
219 | ||
b64da5a5 SH |
220 | if (saddr) |
221 | addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4); | |
aa574cd6 WC |
222 | else if (memcmp(&saddr6, &in6addr_any, sizeof(saddr6)) != 0) |
223 | addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6, sizeof(struct in6_addr)); | |
224 | ||
a5494df2 SH |
225 | if (link) |
226 | addattr32(n, 1024, IFLA_VXLAN_LINK, link); | |
227 | addattr8(n, 1024, IFLA_VXLAN_TTL, ttl); | |
228 | addattr8(n, 1024, IFLA_VXLAN_TOS, tos); | |
229 | addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning); | |
1556e29d DS |
230 | addattr8(n, 1024, IFLA_VXLAN_PROXY, proxy); |
231 | addattr8(n, 1024, IFLA_VXLAN_RSC, rsc); | |
232 | addattr8(n, 1024, IFLA_VXLAN_L2MISS, l2miss); | |
233 | addattr8(n, 1024, IFLA_VXLAN_L3MISS, l3miss); | |
514cdfb4 | 234 | |
a5494df2 SH |
235 | if (noage) |
236 | addattr32(n, 1024, IFLA_VXLAN_AGEING, 0); | |
237 | else if (age) | |
238 | addattr32(n, 1024, IFLA_VXLAN_AGEING, age); | |
239 | if (maxaddr) | |
240 | addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr); | |
2d596120 SH |
241 | if (range.low || range.high) |
242 | addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE, | |
243 | &range, sizeof(range)); | |
514cdfb4 SH |
244 | if (dstport) |
245 | addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport)); | |
a5494df2 SH |
246 | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
251 | { | |
252 | __u32 vni; | |
253 | unsigned link; | |
2d596120 SH |
254 | __u8 tos; |
255 | __u32 maxaddr; | |
a5494df2 SH |
256 | char s1[1024]; |
257 | char s2[64]; | |
258 | ||
259 | if (!tb) | |
260 | return; | |
261 | ||
262 | if (!tb[IFLA_VXLAN_ID] || | |
263 | RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32)) | |
264 | return; | |
265 | ||
266 | vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]); | |
267 | fprintf(f, "id %u ", vni); | |
268 | ||
269 | if (tb[IFLA_VXLAN_GROUP]) { | |
b64da5a5 | 270 | __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]); |
7cfa3802 AW |
271 | if (addr) { |
272 | if (IN_MULTICAST(ntohl(addr))) | |
273 | fprintf(f, "group %s ", | |
274 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
275 | else | |
276 | fprintf(f, "remote %s ", | |
277 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
278 | } | |
aa574cd6 WC |
279 | } else if (tb[IFLA_VXLAN_GROUP6]) { |
280 | struct in6_addr addr; | |
281 | memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr)); | |
282 | if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) { | |
283 | if (IN6_IS_ADDR_MULTICAST(&addr)) | |
284 | fprintf(f, "group %s ", | |
285 | format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); | |
286 | else | |
287 | fprintf(f, "remote %s ", | |
288 | format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); | |
289 | } | |
a5494df2 SH |
290 | } |
291 | ||
292 | if (tb[IFLA_VXLAN_LOCAL]) { | |
b64da5a5 | 293 | __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]); |
a5494df2 | 294 | if (addr) |
1556e29d | 295 | fprintf(f, "local %s ", |
a5494df2 | 296 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); |
aa574cd6 WC |
297 | } else if (tb[IFLA_VXLAN_LOCAL6]) { |
298 | struct in6_addr addr; | |
299 | memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr)); | |
300 | if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) | |
301 | fprintf(f, "local %s ", | |
302 | format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); | |
a5494df2 SH |
303 | } |
304 | ||
305 | if (tb[IFLA_VXLAN_LINK] && | |
306 | (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) { | |
307 | const char *n = if_indextoname(link, s2); | |
308 | ||
309 | if (n) | |
310 | fprintf(f, "dev %s ", n); | |
311 | else | |
312 | fprintf(f, "dev %u ", link); | |
313 | } | |
314 | ||
2d596120 SH |
315 | if (tb[IFLA_VXLAN_PORT_RANGE]) { |
316 | const struct ifla_vxlan_port_range *r | |
317 | = RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]); | |
514cdfb4 | 318 | fprintf(f, "srcport %u %u ", ntohs(r->low), ntohs(r->high)); |
1556e29d | 319 | } |
2d596120 | 320 | |
514cdfb4 SH |
321 | if (tb[IFLA_VXLAN_PORT]) |
322 | fprintf(f, "dstport %u ", | |
323 | ntohs(rta_getattr_u16(tb[IFLA_VXLAN_PORT]))); | |
324 | ||
a5494df2 SH |
325 | if (tb[IFLA_VXLAN_LEARNING] && |
326 | !rta_getattr_u8(tb[IFLA_VXLAN_LEARNING])) | |
327 | fputs("nolearning ", f); | |
1556e29d DS |
328 | |
329 | if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY])) | |
330 | fputs("proxy ", f); | |
331 | ||
332 | if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC])) | |
333 | fputs("rsc ", f); | |
334 | ||
335 | if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS])) | |
336 | fputs("l2miss ", f); | |
337 | ||
338 | if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS])) | |
339 | fputs("l3miss ", f); | |
340 | ||
2d596120 SH |
341 | if (tb[IFLA_VXLAN_TOS] && |
342 | (tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) { | |
a5494df2 SH |
343 | if (tos == 1) |
344 | fprintf(f, "tos inherit "); | |
345 | else | |
346 | fprintf(f, "tos %#x ", tos); | |
347 | } | |
348 | ||
349 | if (tb[IFLA_VXLAN_TTL]) { | |
350 | __u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]); | |
351 | if (ttl) | |
352 | fprintf(f, "ttl %d ", ttl); | |
353 | } | |
354 | ||
355 | if (tb[IFLA_VXLAN_AGEING]) { | |
356 | __u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]); | |
357 | if (age == 0) | |
358 | fprintf(f, "ageing none "); | |
359 | else | |
360 | fprintf(f, "ageing %u ", age); | |
361 | } | |
2d596120 SH |
362 | |
363 | if (tb[IFLA_VXLAN_LIMIT] && | |
6ad5399c | 364 | ((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0)) |
2d596120 | 365 | fprintf(f, "maxaddr %u ", maxaddr); |
a5494df2 SH |
366 | } |
367 | ||
368 | struct link_util vxlan_link_util = { | |
369 | .id = "vxlan", | |
370 | .maxattr = IFLA_VXLAN_MAX, | |
371 | .parse_opt = vxlan_parse_opt, | |
372 | .print_opt = vxlan_print_opt, | |
373 | }; |