1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
|
/*
* iplink_vxlan.c VXLAN device support
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Stephen Hemminger <shemminger@vyatta.com
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <net/if.h>
#include <linux/ip.h>
#include <linux/if_link.h>
#include <arpa/inet.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static void print_explain(FILE *f)
{
fprintf(f, "Usage: ... vxlan id VNI [ { group | remote } ADDR ] [ local ADDR ]\n");
fprintf(f, " [ ttl TTL ] [ tos TOS ] [ dev PHYS_DEV ]\n");
fprintf(f, " [ dstport PORT ] [ srcport MIN MAX ]\n");
fprintf(f, " [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n");
fprintf(f, " [ [no]l2miss ] [ [no]l3miss ]\n");
fprintf(f, " [ ageing SECONDS ] [ maxaddress NUMBER ]\n");
fprintf(f, " [ [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]\n");
fprintf(f, " [ [no]remcsumtx ] [ [no]remcsumrx ]\n");
fprintf(f, " [ [no]external ] [ gbp ]\n");
fprintf(f, "\n");
fprintf(f, "Where: VNI := 0-16777215\n");
fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
fprintf(f, " TOS := { NUMBER | inherit }\n");
fprintf(f, " TTL := { 1..255 | inherit }\n");
}
static void explain(void)
{
print_explain(stderr);
}
static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
__u32 vni = 0;
int vni_set = 0;
__u32 saddr = 0;
__u32 gaddr = 0;
__u32 daddr = 0;
struct in6_addr saddr6 = IN6ADDR_ANY_INIT;
struct in6_addr gaddr6 = IN6ADDR_ANY_INIT;
struct in6_addr daddr6 = IN6ADDR_ANY_INIT;
unsigned link = 0;
__u8 tos = 0;
__u8 ttl = 0;
__u8 learning = 1;
__u8 proxy = 0;
__u8 rsc = 0;
__u8 l2miss = 0;
__u8 l3miss = 0;
__u8 noage = 0;
__u32 age = 0;
__u32 maxaddr = 0;
__u16 dstport = 0;
__u8 udpcsum = 0;
__u8 udp6zerocsumtx = 0;
__u8 udp6zerocsumrx = 0;
__u8 remcsumtx = 0;
__u8 remcsumrx = 0;
__u8 metadata = 0;
__u8 gbp = 0;
int dst_port_set = 0;
struct ifla_vxlan_port_range range = { 0, 0 };
while (argc > 0) {
if (!matches(*argv, "id") ||
!matches(*argv, "vni")) {
NEXT_ARG();
if (get_u32(&vni, *argv, 0) ||
vni >= 1u << 24)
invarg("invalid id", *argv);
vni_set = 1;
} else if (!matches(*argv, "group")) {
NEXT_ARG();
if (!inet_get_addr(*argv, &gaddr, &gaddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
if (!IN6_IS_ADDR_MULTICAST(&gaddr6) && !IN_MULTICAST(ntohl(gaddr)))
invarg("invalid group address", *argv);
} else if (!matches(*argv, "remote")) {
NEXT_ARG();
if (!inet_get_addr(*argv, &daddr, &daddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr)))
invarg("invalid remote address", *argv);
} else if (!matches(*argv, "local")) {
NEXT_ARG();
if (strcmp(*argv, "any")) {
if (!inet_get_addr(*argv, &saddr, &saddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
}
if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6))
invarg("invalid local address", *argv);
} else if (!matches(*argv, "dev")) {
NEXT_ARG();
link = if_nametoindex(*argv);
if (link == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n",
*argv);
exit(-1);
}
} else if (!matches(*argv, "ttl") ||
!matches(*argv, "hoplimit")) {
unsigned uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (get_unsigned(&uval, *argv, 0))
invarg("invalid TTL", *argv);
if (uval > 255)
invarg("TTL must be <= 255", *argv);
ttl = uval;
}
} else if (!matches(*argv, "tos") ||
!matches(*argv, "dsfield")) {
__u32 uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (rtnl_dsfield_a2n(&uval, *argv))
invarg("bad TOS value", *argv);
tos = uval;
} else
tos = 1;
} else if (!matches(*argv, "ageing")) {
NEXT_ARG();
if (strcmp(*argv, "none") == 0)
noage = 1;
else if (get_u32(&age, *argv, 0))
invarg("ageing timer", *argv);
} else if (!matches(*argv, "maxaddress")) {
NEXT_ARG();
if (strcmp(*argv, "unlimited") == 0)
maxaddr = 0;
else if (get_u32(&maxaddr, *argv, 0))
invarg("max addresses", *argv);
} else if (!matches(*argv, "port") ||
!matches(*argv, "srcport")) {
__u16 minport, maxport;
NEXT_ARG();
if (get_u16(&minport, *argv, 0))
invarg("min port", *argv);
NEXT_ARG();
if (get_u16(&maxport, *argv, 0))
invarg("max port", *argv);
range.low = htons(minport);
range.high = htons(maxport);
} else if (!matches(*argv, "dstport")){
NEXT_ARG();
if (get_u16(&dstport, *argv, 0))
invarg("dst port", *argv);
dst_port_set = 1;
} else if (!matches(*argv, "nolearning")) {
learning = 0;
} else if (!matches(*argv, "learning")) {
learning = 1;
} else if (!matches(*argv, "noproxy")) {
proxy = 0;
} else if (!matches(*argv, "proxy")) {
proxy = 1;
} else if (!matches(*argv, "norsc")) {
rsc = 0;
} else if (!matches(*argv, "rsc")) {
rsc = 1;
} else if (!matches(*argv, "nol2miss")) {
l2miss = 0;
} else if (!matches(*argv, "l2miss")) {
l2miss = 1;
} else if (!matches(*argv, "nol3miss")) {
l3miss = 0;
} else if (!matches(*argv, "l3miss")) {
l3miss = 1;
} else if (!matches(*argv, "udpcsum")) {
udpcsum = 1;
} else if (!matches(*argv, "noudpcsum")) {
udpcsum = 0;
} else if (!matches(*argv, "udp6zerocsumtx")) {
udp6zerocsumtx = 1;
} else if (!matches(*argv, "noudp6zerocsumtx")) {
udp6zerocsumtx = 0;
} else if (!matches(*argv, "udp6zerocsumrx")) {
udp6zerocsumrx = 1;
} else if (!matches(*argv, "noudp6zerocsumrx")) {
udp6zerocsumrx = 0;
} else if (!matches(*argv, "remcsumtx")) {
remcsumtx = 1;
} else if (!matches(*argv, "noremcsumtx")) {
remcsumtx = 0;
} else if (!matches(*argv, "remcsumrx")) {
remcsumrx = 1;
} else if (!matches(*argv, "noremcsumrx")) {
remcsumrx = 0;
} else if (!matches(*argv, "external")) {
metadata = 1;
} else if (!matches(*argv, "noexternal")) {
metadata = 0;
} else if (!matches(*argv, "gbp")) {
gbp = 1;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
argc--, argv++;
}
if (metadata && vni_set) {
fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");
return -1;
}
if (!metadata && !vni_set) {
fprintf(stderr, "vxlan: missing virtual network identifier\n");
return -1;
}
if ((gaddr && daddr) ||
(memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) &&
memcmp(&daddr6, &in6addr_any, sizeof(daddr6)))) {
fprintf(stderr, "vxlan: both group and remote cannot be specified\n");
return -1;
}
if (!dst_port_set) {
fprintf(stderr, "vxlan: destination port not specified\n"
"Will use Linux kernel default (non-standard value)\n");
fprintf(stderr,
"Use 'dstport 4789' to get the IANA assigned value\n"
"Use 'dstport 0' to get default and quiet this message\n");
}
addattr32(n, 1024, IFLA_VXLAN_ID, vni);
if (gaddr)
addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4);
else if (daddr)
addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4);
if (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) != 0)
addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &gaddr6, sizeof(struct in6_addr));
else if (memcmp(&daddr6, &in6addr_any, sizeof(daddr6)) != 0)
addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr));
if (saddr)
addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4);
else if (memcmp(&saddr6, &in6addr_any, sizeof(saddr6)) != 0)
addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6, sizeof(struct in6_addr));
if (link)
addattr32(n, 1024, IFLA_VXLAN_LINK, link);
addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
addattr8(n, 1024, IFLA_VXLAN_TOS, tos);
addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning);
addattr8(n, 1024, IFLA_VXLAN_PROXY, proxy);
addattr8(n, 1024, IFLA_VXLAN_RSC, rsc);
addattr8(n, 1024, IFLA_VXLAN_L2MISS, l2miss);
addattr8(n, 1024, IFLA_VXLAN_L3MISS, l3miss);
addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, udpcsum);
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, remcsumtx);
addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, remcsumrx);
addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA, metadata);
if (noage)
addattr32(n, 1024, IFLA_VXLAN_AGEING, 0);
else if (age)
addattr32(n, 1024, IFLA_VXLAN_AGEING, age);
if (maxaddr)
addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr);
if (range.low || range.high)
addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE,
&range, sizeof(range));
if (dstport)
addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport));
if (gbp)
addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0);
return 0;
}
static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
__u32 vni;
unsigned link;
__u8 tos;
__u32 maxaddr;
char s1[1024];
char s2[64];
if (!tb)
return;
if (!tb[IFLA_VXLAN_ID] ||
RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32))
return;
vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]);
fprintf(f, "id %u ", vni);
if (tb[IFLA_VXLAN_GROUP]) {
__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]);
if (addr) {
if (IN_MULTICAST(ntohl(addr)))
fprintf(f, "group %s ",
format_host(AF_INET, 4, &addr, s1, sizeof(s1)));
else
fprintf(f, "remote %s ",
format_host(AF_INET, 4, &addr, s1, sizeof(s1)));
}
} else if (tb[IFLA_VXLAN_GROUP6]) {
struct in6_addr addr;
memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr));
if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) {
if (IN6_IS_ADDR_MULTICAST(&addr))
fprintf(f, "group %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1)));
else
fprintf(f, "remote %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1)));
}
}
if (tb[IFLA_VXLAN_LOCAL]) {
__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]);
if (addr)
fprintf(f, "local %s ",
format_host(AF_INET, 4, &addr, s1, sizeof(s1)));
} else if (tb[IFLA_VXLAN_LOCAL6]) {
struct in6_addr addr;
memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));
if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0)
fprintf(f, "local %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1)));
}
if (tb[IFLA_VXLAN_LINK] &&
(link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) {
const char *n = if_indextoname(link, s2);
if (n)
fprintf(f, "dev %s ", n);
else
fprintf(f, "dev %u ", link);
}
if (tb[IFLA_VXLAN_PORT_RANGE]) {
const struct ifla_vxlan_port_range *r
= RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]);
fprintf(f, "srcport %u %u ", ntohs(r->low), ntohs(r->high));
}
if (tb[IFLA_VXLAN_PORT])
fprintf(f, "dstport %u ",
ntohs(rta_getattr_u16(tb[IFLA_VXLAN_PORT])));
if (tb[IFLA_VXLAN_LEARNING] &&
!rta_getattr_u8(tb[IFLA_VXLAN_LEARNING]))
fputs("nolearning ", f);
if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY]))
fputs("proxy ", f);
if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC]))
fputs("rsc ", f);
if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS]))
fputs("l2miss ", f);
if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS]))
fputs("l3miss ", f);
if (tb[IFLA_VXLAN_TOS] &&
(tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) {
if (tos == 1)
fprintf(f, "tos inherit ");
else
fprintf(f, "tos %#x ", tos);
}
if (tb[IFLA_VXLAN_TTL]) {
__u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]);
if (ttl)
fprintf(f, "ttl %d ", ttl);
}
if (tb[IFLA_VXLAN_AGEING]) {
__u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]);
if (age == 0)
fprintf(f, "ageing none ");
else
fprintf(f, "ageing %u ", age);
}
if (tb[IFLA_VXLAN_LIMIT] &&
((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0))
fprintf(f, "maxaddr %u ", maxaddr);
if (tb[IFLA_VXLAN_UDP_CSUM] && rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM]))
fputs("udpcsum ", f);
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
fputs("udp6zerocsumtx ", f);
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
fputs("udp6zerocsumrx ", f);
if (tb[IFLA_VXLAN_REMCSUM_TX] &&
rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_TX]))
fputs("remcsumtx ", f);
if (tb[IFLA_VXLAN_REMCSUM_RX] &&
rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_RX]))
fputs("remcsumrx ", f);
if (tb[IFLA_VXLAN_COLLECT_METADATA] &&
rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA]))
fputs("external ", f);
if (tb[IFLA_VXLAN_GBP])
fputs("gbp ", f);
}
static void vxlan_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(f);
}
struct link_util vxlan_link_util = {
.id = "vxlan",
.maxattr = IFLA_VXLAN_MAX,
.parse_opt = vxlan_parse_opt,
.print_opt = vxlan_print_opt,
.print_help = vxlan_print_help,
};
|
