2 * iplink_vxlan.c VXLAN device support
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.
9 * Authors: Stephen Hemminger <shemminger@vyatta.com
17 #include <linux/if_link.h>
18 #include <arpa/inet.h>
22 #include "ip_common.h"
24 static void print_explain(FILE *f
)
26 fprintf(f
, "Usage: ... vxlan id VNI [ { group | remote } IP_ADDRESS ] [ local ADDR ]\n");
27 fprintf(f
, " [ ttl TTL ] [ tos TOS ] [ flowlabel LABEL ] [ dev PHYS_DEV ]\n");
28 fprintf(f
, " [ dstport PORT ] [ srcport MIN MAX ]\n");
29 fprintf(f
, " [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n");
30 fprintf(f
, " [ [no]l2miss ] [ [no]l3miss ]\n");
31 fprintf(f
, " [ ageing SECONDS ] [ maxaddress NUMBER ]\n");
32 fprintf(f
, " [ [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]\n");
33 fprintf(f
, " [ [no]remcsumtx ] [ [no]remcsumrx ]\n");
34 fprintf(f
, " [ [no]external ] [ gbp ] [ gpe ]\n");
36 fprintf(f
, "Where: VNI := 0-16777215\n");
37 fprintf(f
, " ADDR := { IP_ADDRESS | any }\n");
38 fprintf(f
, " TOS := { NUMBER | inherit }\n");
39 fprintf(f
, " TTL := { 1..255 | inherit }\n");
40 fprintf(f
, " LABEL := 0-1048575\n");
43 static void explain(void)
45 print_explain(stderr
);
48 static int vxlan_parse_opt(struct link_util
*lu
, int argc
, char **argv
,
56 struct in6_addr saddr6
= IN6ADDR_ANY_INIT
;
57 struct in6_addr gaddr6
= IN6ADDR_ANY_INIT
;
58 struct in6_addr daddr6
= IN6ADDR_ANY_INIT
;
59 unsigned int link
= 0;
73 bool udpcsum_set
= false;
74 __u8 udp6zerocsumtx
= 0;
75 bool udp6zerocsumtx_set
= false;
76 __u8 udp6zerocsumrx
= 0;
77 bool udp6zerocsumrx_set
= false;
84 struct ifla_vxlan_port_range range
= { 0, 0 };
87 if (!matches(*argv
, "id") ||
88 !matches(*argv
, "vni")) {
90 if (get_u32(&vni
, *argv
, 0) ||
92 invarg("invalid id", *argv
);
94 } else if (!matches(*argv
, "group")) {
96 if (!inet_get_addr(*argv
, &gaddr
, &gaddr6
)) {
97 fprintf(stderr
, "Invalid address \"%s\"\n", *argv
);
100 if (!IN6_IS_ADDR_MULTICAST(&gaddr6
) && !IN_MULTICAST(ntohl(gaddr
)))
101 invarg("invalid group address", *argv
);
102 } else if (!matches(*argv
, "remote")) {
104 if (!inet_get_addr(*argv
, &daddr
, &daddr6
)) {
105 fprintf(stderr
, "Invalid address \"%s\"\n", *argv
);
108 if (IN6_IS_ADDR_MULTICAST(&daddr6
) || IN_MULTICAST(ntohl(daddr
)))
109 invarg("invalid remote address", *argv
);
110 } else if (!matches(*argv
, "local")) {
112 if (strcmp(*argv
, "any")) {
113 if (!inet_get_addr(*argv
, &saddr
, &saddr6
)) {
114 fprintf(stderr
, "Invalid address \"%s\"\n", *argv
);
119 if (IN_MULTICAST(ntohl(saddr
)) || IN6_IS_ADDR_MULTICAST(&saddr6
))
120 invarg("invalid local address", *argv
);
121 } else if (!matches(*argv
, "dev")) {
123 link
= if_nametoindex(*argv
);
125 fprintf(stderr
, "Cannot find device \"%s\"\n",
129 } else if (!matches(*argv
, "ttl") ||
130 !matches(*argv
, "hoplimit")) {
134 if (strcmp(*argv
, "inherit") != 0) {
135 if (get_unsigned(&uval
, *argv
, 0))
136 invarg("invalid TTL", *argv
);
138 invarg("TTL must be <= 255", *argv
);
141 } else if (!matches(*argv
, "tos") ||
142 !matches(*argv
, "dsfield")) {
146 if (strcmp(*argv
, "inherit") != 0) {
147 if (rtnl_dsfield_a2n(&uval
, *argv
))
148 invarg("bad TOS value", *argv
);
152 } else if (!matches(*argv
, "label") ||
153 !matches(*argv
, "flowlabel")) {
157 if (get_u32(&uval
, *argv
, 0) ||
158 (uval
& ~LABEL_MAX_MASK
))
159 invarg("invalid flowlabel", *argv
);
161 } else if (!matches(*argv
, "ageing")) {
163 if (strcmp(*argv
, "none") == 0)
165 else if (get_u32(&age
, *argv
, 0))
166 invarg("ageing timer", *argv
);
167 } else if (!matches(*argv
, "maxaddress")) {
169 if (strcmp(*argv
, "unlimited") == 0)
171 else if (get_u32(&maxaddr
, *argv
, 0))
172 invarg("max addresses", *argv
);
173 } else if (!matches(*argv
, "port") ||
174 !matches(*argv
, "srcport")) {
176 if (get_be16(&range
.low
, *argv
, 0))
177 invarg("min port", *argv
);
179 if (get_be16(&range
.high
, *argv
, 0))
180 invarg("max port", *argv
);
181 } else if (!matches(*argv
, "dstport")) {
183 if (get_u16(&dstport
, *argv
, 0))
184 invarg("dst port", *argv
);
186 } else if (!matches(*argv
, "nolearning")) {
188 } else if (!matches(*argv
, "learning")) {
190 } else if (!matches(*argv
, "noproxy")) {
192 } else if (!matches(*argv
, "proxy")) {
194 } else if (!matches(*argv
, "norsc")) {
196 } else if (!matches(*argv
, "rsc")) {
198 } else if (!matches(*argv
, "nol2miss")) {
200 } else if (!matches(*argv
, "l2miss")) {
202 } else if (!matches(*argv
, "nol3miss")) {
204 } else if (!matches(*argv
, "l3miss")) {
206 } else if (!matches(*argv
, "udpcsum")) {
209 } else if (!matches(*argv
, "noudpcsum")) {
212 } else if (!matches(*argv
, "udp6zerocsumtx")) {
214 udp6zerocsumtx_set
= true;
215 } else if (!matches(*argv
, "noudp6zerocsumtx")) {
217 udp6zerocsumtx_set
= true;
218 } else if (!matches(*argv
, "udp6zerocsumrx")) {
220 udp6zerocsumrx_set
= true;
221 } else if (!matches(*argv
, "noudp6zerocsumrx")) {
223 udp6zerocsumrx_set
= true;
224 } else if (!matches(*argv
, "remcsumtx")) {
226 } else if (!matches(*argv
, "noremcsumtx")) {
228 } else if (!matches(*argv
, "remcsumrx")) {
230 } else if (!matches(*argv
, "noremcsumrx")) {
232 } else if (!matches(*argv
, "external")) {
235 } else if (!matches(*argv
, "noexternal")) {
237 } else if (!matches(*argv
, "gbp")) {
239 } else if (!matches(*argv
, "gpe")) {
241 } else if (matches(*argv
, "help") == 0) {
245 fprintf(stderr
, "vxlan: unknown command \"%s\"?\n", *argv
);
252 if (metadata
&& vni_set
) {
253 fprintf(stderr
, "vxlan: both 'external' and vni cannot be specified\n");
257 if (!metadata
&& !vni_set
) {
258 fprintf(stderr
, "vxlan: missing virtual network identifier\n");
262 if ((gaddr
&& daddr
) ||
263 (!IN6_IS_ADDR_UNSPECIFIED(&gaddr6
) &&
264 !IN6_IS_ADDR_UNSPECIFIED(&daddr6
))) {
265 fprintf(stderr
, "vxlan: both group and remote cannot be specified\n");
269 if ((gaddr
|| !IN6_IS_ADDR_UNSPECIFIED(&gaddr6
)) && !link
) {
270 fprintf(stderr
, "vxlan: 'group' requires 'dev' to be specified\n");
274 if (!dst_port_set
&& gpe
) {
276 } else if (!dst_port_set
) {
277 fprintf(stderr
, "vxlan: destination port not specified\n"
278 "Will use Linux kernel default (non-standard value)\n");
280 "Use 'dstport 4789' to get the IANA assigned value\n"
281 "Use 'dstport 0' to get default and quiet this message\n");
284 addattr32(n
, 1024, IFLA_VXLAN_ID
, vni
);
286 addattr_l(n
, 1024, IFLA_VXLAN_GROUP
, &gaddr
, 4);
288 addattr_l(n
, 1024, IFLA_VXLAN_GROUP
, &daddr
, 4);
289 if (!IN6_IS_ADDR_UNSPECIFIED(&gaddr6
))
290 addattr_l(n
, 1024, IFLA_VXLAN_GROUP6
, &gaddr6
, sizeof(struct in6_addr
));
291 else if (!IN6_IS_ADDR_UNSPECIFIED(&daddr6
))
292 addattr_l(n
, 1024, IFLA_VXLAN_GROUP6
, &daddr6
, sizeof(struct in6_addr
));
295 addattr_l(n
, 1024, IFLA_VXLAN_LOCAL
, &saddr
, 4);
296 else if (!IN6_IS_ADDR_UNSPECIFIED(&saddr6
))
297 addattr_l(n
, 1024, IFLA_VXLAN_LOCAL6
, &saddr6
, sizeof(struct in6_addr
));
300 addattr32(n
, 1024, IFLA_VXLAN_LINK
, link
);
301 addattr32(n
, 1024, IFLA_VXLAN_LABEL
, label
);
302 addattr8(n
, 1024, IFLA_VXLAN_TTL
, ttl
);
303 addattr8(n
, 1024, IFLA_VXLAN_TOS
, tos
);
304 addattr8(n
, 1024, IFLA_VXLAN_LEARNING
, learning
);
305 addattr8(n
, 1024, IFLA_VXLAN_PROXY
, proxy
);
306 addattr8(n
, 1024, IFLA_VXLAN_RSC
, rsc
);
307 addattr8(n
, 1024, IFLA_VXLAN_L2MISS
, l2miss
);
308 addattr8(n
, 1024, IFLA_VXLAN_L3MISS
, l3miss
);
309 addattr8(n
, 1024, IFLA_VXLAN_REMCSUM_TX
, remcsumtx
);
310 addattr8(n
, 1024, IFLA_VXLAN_REMCSUM_RX
, remcsumrx
);
311 addattr8(n
, 1024, IFLA_VXLAN_COLLECT_METADATA
, metadata
);
314 addattr8(n
, 1024, IFLA_VXLAN_UDP_CSUM
, udpcsum
);
315 if (udp6zerocsumtx_set
)
316 addattr8(n
, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX
, udp6zerocsumtx
);
317 if (udp6zerocsumrx_set
)
318 addattr8(n
, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX
, udp6zerocsumrx
);
320 addattr32(n
, 1024, IFLA_VXLAN_AGEING
, 0);
322 addattr32(n
, 1024, IFLA_VXLAN_AGEING
, age
);
324 addattr32(n
, 1024, IFLA_VXLAN_LIMIT
, maxaddr
);
325 if (range
.low
|| range
.high
)
326 addattr_l(n
, 1024, IFLA_VXLAN_PORT_RANGE
,
327 &range
, sizeof(range
));
329 addattr16(n
, 1024, IFLA_VXLAN_PORT
, htons(dstport
));
332 addattr_l(n
, 1024, IFLA_VXLAN_GBP
, NULL
, 0);
334 addattr_l(n
, 1024, IFLA_VXLAN_GPE
, NULL
, 0);
340 static void vxlan_print_opt(struct link_util
*lu
, FILE *f
, struct rtattr
*tb
[])
351 if (!tb
[IFLA_VXLAN_ID
] ||
352 RTA_PAYLOAD(tb
[IFLA_VXLAN_ID
]) < sizeof(__u32
))
355 vni
= rta_getattr_u32(tb
[IFLA_VXLAN_ID
]);
356 fprintf(f
, "id %u ", vni
);
358 if (tb
[IFLA_VXLAN_GROUP
]) {
359 __be32 addr
= rta_getattr_u32(tb
[IFLA_VXLAN_GROUP
]);
362 if (IN_MULTICAST(ntohl(addr
)))
363 fprintf(f
, "group %s ",
364 format_host(AF_INET
, 4, &addr
));
366 fprintf(f
, "remote %s ",
367 format_host(AF_INET
, 4, &addr
));
369 } else if (tb
[IFLA_VXLAN_GROUP6
]) {
370 struct in6_addr addr
;
372 memcpy(&addr
, RTA_DATA(tb
[IFLA_VXLAN_GROUP6
]), sizeof(struct in6_addr
));
373 if (!IN6_IS_ADDR_UNSPECIFIED(&addr
)) {
374 if (IN6_IS_ADDR_MULTICAST(&addr
))
375 fprintf(f
, "group %s ",
376 format_host(AF_INET6
, sizeof(struct in6_addr
), &addr
));
378 fprintf(f
, "remote %s ",
379 format_host(AF_INET6
, sizeof(struct in6_addr
), &addr
));
383 if (tb
[IFLA_VXLAN_LOCAL
]) {
384 __be32 addr
= rta_getattr_u32(tb
[IFLA_VXLAN_LOCAL
]);
387 fprintf(f
, "local %s ",
388 format_host(AF_INET
, 4, &addr
));
389 } else if (tb
[IFLA_VXLAN_LOCAL6
]) {
390 struct in6_addr addr
;
392 memcpy(&addr
, RTA_DATA(tb
[IFLA_VXLAN_LOCAL6
]), sizeof(struct in6_addr
));
393 if (!IN6_IS_ADDR_UNSPECIFIED(&addr
))
394 fprintf(f
, "local %s ",
395 format_host(AF_INET6
, sizeof(struct in6_addr
), &addr
));
398 if (tb
[IFLA_VXLAN_LINK
] &&
399 (link
= rta_getattr_u32(tb
[IFLA_VXLAN_LINK
]))) {
400 const char *n
= if_indextoname(link
, s2
);
403 fprintf(f
, "dev %s ", n
);
405 fprintf(f
, "dev %u ", link
);
408 if (tb
[IFLA_VXLAN_PORT_RANGE
]) {
409 const struct ifla_vxlan_port_range
*r
410 = RTA_DATA(tb
[IFLA_VXLAN_PORT_RANGE
]);
411 fprintf(f
, "srcport %u %u ", ntohs(r
->low
), ntohs(r
->high
));
414 if (tb
[IFLA_VXLAN_PORT
])
415 fprintf(f
, "dstport %u ",
416 rta_getattr_be16(tb
[IFLA_VXLAN_PORT
]));
418 if (tb
[IFLA_VXLAN_LEARNING
] &&
419 !rta_getattr_u8(tb
[IFLA_VXLAN_LEARNING
]))
420 fputs("nolearning ", f
);
422 if (tb
[IFLA_VXLAN_PROXY
] && rta_getattr_u8(tb
[IFLA_VXLAN_PROXY
]))
425 if (tb
[IFLA_VXLAN_RSC
] && rta_getattr_u8(tb
[IFLA_VXLAN_RSC
]))
428 if (tb
[IFLA_VXLAN_L2MISS
] && rta_getattr_u8(tb
[IFLA_VXLAN_L2MISS
]))
431 if (tb
[IFLA_VXLAN_L3MISS
] && rta_getattr_u8(tb
[IFLA_VXLAN_L3MISS
]))
434 if (tb
[IFLA_VXLAN_TOS
] &&
435 (tos
= rta_getattr_u8(tb
[IFLA_VXLAN_TOS
]))) {
437 fprintf(f
, "tos inherit ");
439 fprintf(f
, "tos %#x ", tos
);
442 if (tb
[IFLA_VXLAN_TTL
]) {
443 __u8 ttl
= rta_getattr_u8(tb
[IFLA_VXLAN_TTL
]);
446 fprintf(f
, "ttl %d ", ttl
);
449 if (tb
[IFLA_VXLAN_LABEL
]) {
450 __u32 label
= rta_getattr_u32(tb
[IFLA_VXLAN_LABEL
]);
453 fprintf(f
, "flowlabel %#x ", ntohl(label
));
456 if (tb
[IFLA_VXLAN_AGEING
]) {
457 __u32 age
= rta_getattr_u32(tb
[IFLA_VXLAN_AGEING
]);
460 fprintf(f
, "ageing none ");
462 fprintf(f
, "ageing %u ", age
);
465 if (tb
[IFLA_VXLAN_LIMIT
] &&
466 ((maxaddr
= rta_getattr_u32(tb
[IFLA_VXLAN_LIMIT
])) != 0))
467 fprintf(f
, "maxaddr %u ", maxaddr
);
469 if (tb
[IFLA_VXLAN_UDP_CSUM
]) {
470 if (!rta_getattr_u8(tb
[IFLA_VXLAN_UDP_CSUM
]))
472 fputs("udpcsum ", f
);
475 if (tb
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]) {
476 if (!rta_getattr_u8(tb
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]))
478 fputs("udp6zerocsumtx ", f
);
481 if (tb
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]) {
482 if (!rta_getattr_u8(tb
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]))
484 fputs("udp6zerocsumrx ", f
);
487 if (tb
[IFLA_VXLAN_REMCSUM_TX
] &&
488 rta_getattr_u8(tb
[IFLA_VXLAN_REMCSUM_TX
]))
489 fputs("remcsumtx ", f
);
491 if (tb
[IFLA_VXLAN_REMCSUM_RX
] &&
492 rta_getattr_u8(tb
[IFLA_VXLAN_REMCSUM_RX
]))
493 fputs("remcsumrx ", f
);
495 if (tb
[IFLA_VXLAN_COLLECT_METADATA
] &&
496 rta_getattr_u8(tb
[IFLA_VXLAN_COLLECT_METADATA
]))
497 fputs("external ", f
);
499 if (tb
[IFLA_VXLAN_GBP
])
501 if (tb
[IFLA_VXLAN_GPE
])
505 static void vxlan_print_help(struct link_util
*lu
, int argc
, char **argv
,
511 struct link_util vxlan_link_util
= {
513 .maxattr
= IFLA_VXLAN_MAX
,
514 .parse_opt
= vxlan_parse_opt
,
515 .print_opt
= vxlan_print_opt
,
516 .print_help
= vxlan_print_help
,