2 * iplink_geneve.c GENEVE 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: John W. Linville <linville@tuxdriver.com>
16 #include "ip_common.h"
18 #define GENEVE_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
20 static void print_explain(FILE *f
)
23 "Usage: ... geneve id VNI\n"
27 " [ flowlabel LABEL ]\n"
31 " [ [no]udp6zerocsumtx ]\n"
32 " [ [no]udp6zerocsumrx ]\n"
34 "Where: VNI := 0-16777215\n"
35 " ADDR := IP_ADDRESS\n"
36 " TOS := { NUMBER | inherit }\n"
37 " TTL := { 1..255 | inherit }\n"
38 " LABEL := 0-1048575\n"
42 static void explain(void)
44 print_explain(stderr
);
47 static void check_duparg(__u64
*attrs
, int type
, const char *key
,
50 if (!GENEVE_ATTRSET(*attrs
, type
)) {
51 *attrs
|= (1L << type
);
57 static int geneve_parse_opt(struct link_util
*lu
, int argc
, char **argv
,
62 struct in6_addr daddr6
= IN6ADDR_ANY_INIT
;
69 __u8 udp6zerocsumtx
= 0;
70 __u8 udp6zerocsumrx
= 0;
72 bool set_op
= (n
->nlmsg_type
== RTM_NEWLINK
&&
73 !(n
->nlmsg_flags
& NLM_F_CREATE
));
76 if (!matches(*argv
, "id") ||
77 !matches(*argv
, "vni")) {
79 check_duparg(&attrs
, IFLA_GENEVE_ID
, "id", *argv
);
80 if (get_u32(&vni
, *argv
, 0) ||
82 invarg("invalid id", *argv
);
83 } else if (!matches(*argv
, "remote")) {
85 check_duparg(&attrs
, IFLA_GENEVE_REMOTE
, "remote",
87 if (!inet_get_addr(*argv
, &daddr
, &daddr6
)) {
88 fprintf(stderr
, "Invalid address \"%s\"\n", *argv
);
91 if (IN6_IS_ADDR_MULTICAST(&daddr6
) || IN_MULTICAST(ntohl(daddr
)))
92 invarg("invalid remote address", *argv
);
93 } else if (!matches(*argv
, "ttl") ||
94 !matches(*argv
, "hoplimit")) {
98 check_duparg(&attrs
, IFLA_GENEVE_TTL
, "ttl", *argv
);
99 if (strcmp(*argv
, "inherit") != 0) {
100 if (get_unsigned(&uval
, *argv
, 0))
101 invarg("invalid TTL", *argv
);
103 invarg("TTL must be <= 255", *argv
);
106 } else if (!matches(*argv
, "tos") ||
107 !matches(*argv
, "dsfield")) {
111 check_duparg(&attrs
, IFLA_GENEVE_TOS
, "tos", *argv
);
112 if (strcmp(*argv
, "inherit") != 0) {
113 if (rtnl_dsfield_a2n(&uval
, *argv
))
114 invarg("bad TOS value", *argv
);
118 } else if (!matches(*argv
, "label") ||
119 !matches(*argv
, "flowlabel")) {
123 check_duparg(&attrs
, IFLA_GENEVE_LABEL
, "flowlabel",
125 if (get_u32(&uval
, *argv
, 0) ||
126 (uval
& ~LABEL_MAX_MASK
))
127 invarg("invalid flowlabel", *argv
);
129 } else if (!matches(*argv
, "dstport")) {
131 check_duparg(&attrs
, IFLA_GENEVE_PORT
, "dstport",
133 if (get_u16(&dstport
, *argv
, 0))
134 invarg("dstport", *argv
);
135 } else if (!matches(*argv
, "external")) {
136 check_duparg(&attrs
, IFLA_GENEVE_COLLECT_METADATA
,
139 } else if (!matches(*argv
, "noexternal")) {
140 check_duparg(&attrs
, IFLA_GENEVE_COLLECT_METADATA
,
143 } else if (!matches(*argv
, "udpcsum")) {
144 check_duparg(&attrs
, IFLA_GENEVE_UDP_CSUM
, *argv
,
147 } else if (!matches(*argv
, "noudpcsum")) {
148 check_duparg(&attrs
, IFLA_GENEVE_UDP_CSUM
, *argv
,
151 } else if (!matches(*argv
, "udp6zerocsumtx")) {
152 check_duparg(&attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_TX
,
155 } else if (!matches(*argv
, "noudp6zerocsumtx")) {
156 check_duparg(&attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_TX
,
159 } else if (!matches(*argv
, "udp6zerocsumrx")) {
160 check_duparg(&attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_RX
,
163 } else if (!matches(*argv
, "noudp6zerocsumrx")) {
164 check_duparg(&attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_RX
,
167 } else if (matches(*argv
, "help") == 0) {
171 fprintf(stderr
, "geneve: unknown command \"%s\"?\n", *argv
);
178 if (metadata
&& GENEVE_ATTRSET(attrs
, IFLA_GENEVE_ID
)) {
179 fprintf(stderr
, "geneve: both 'external' and vni cannot be specified\n");
184 /* parameter checking make sense only for full geneve tunnels */
185 if (!GENEVE_ATTRSET(attrs
, IFLA_GENEVE_ID
)) {
186 fprintf(stderr
, "geneve: missing virtual network identifier\n");
190 /* If we are modifying the geneve device, then we only need the
191 * ID (VNI) to identify the geneve device, and we do not need
194 if (!set_op
&& !daddr
&& IN6_IS_ADDR_UNSPECIFIED(&daddr6
)) {
195 fprintf(stderr
, "geneve: remote link partner not specified\n");
200 addattr32(n
, 1024, IFLA_GENEVE_ID
, vni
);
202 addattr_l(n
, 1024, IFLA_GENEVE_REMOTE
, &daddr
, 4);
203 if (!IN6_IS_ADDR_UNSPECIFIED(&daddr6
)) {
204 addattr_l(n
, 1024, IFLA_GENEVE_REMOTE6
, &daddr6
,
205 sizeof(struct in6_addr
));
207 if (!set_op
|| GENEVE_ATTRSET(attrs
, IFLA_GENEVE_LABEL
))
208 addattr32(n
, 1024, IFLA_GENEVE_LABEL
, label
);
209 if (!set_op
|| GENEVE_ATTRSET(attrs
, IFLA_GENEVE_TTL
))
210 addattr8(n
, 1024, IFLA_GENEVE_TTL
, ttl
);
211 if (!set_op
|| GENEVE_ATTRSET(attrs
, IFLA_GENEVE_TOS
))
212 addattr8(n
, 1024, IFLA_GENEVE_TOS
, tos
);
214 addattr16(n
, 1024, IFLA_GENEVE_PORT
, htons(dstport
));
216 addattr(n
, 1024, IFLA_GENEVE_COLLECT_METADATA
);
217 if (GENEVE_ATTRSET(attrs
, IFLA_GENEVE_UDP_CSUM
))
218 addattr8(n
, 1024, IFLA_GENEVE_UDP_CSUM
, udpcsum
);
219 if (GENEVE_ATTRSET(attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_TX
))
220 addattr8(n
, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX
, udp6zerocsumtx
);
221 if (GENEVE_ATTRSET(attrs
, IFLA_GENEVE_UDP_ZERO_CSUM6_RX
))
222 addattr8(n
, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX
, udp6zerocsumrx
);
227 static void geneve_print_opt(struct link_util
*lu
, FILE *f
, struct rtattr
*tb
[])
236 if (!tb
[IFLA_GENEVE_ID
] ||
237 RTA_PAYLOAD(tb
[IFLA_GENEVE_ID
]) < sizeof(__u32
))
240 vni
= rta_getattr_u32(tb
[IFLA_GENEVE_ID
]);
241 print_uint(PRINT_ANY
, "id", "id %u ", vni
);
243 if (tb
[IFLA_GENEVE_REMOTE
]) {
244 __be32 addr
= rta_getattr_u32(tb
[IFLA_GENEVE_REMOTE
]);
247 print_string(PRINT_ANY
,
250 format_host(AF_INET
, 4, &addr
));
251 } else if (tb
[IFLA_GENEVE_REMOTE6
]) {
252 struct in6_addr addr
;
254 memcpy(&addr
, RTA_DATA(tb
[IFLA_GENEVE_REMOTE6
]), sizeof(struct in6_addr
));
255 if (!IN6_IS_ADDR_UNSPECIFIED(&addr
)) {
256 if (!IN6_IS_ADDR_MULTICAST(&addr
))
257 print_string(PRINT_ANY
,
260 format_host(AF_INET6
,
261 sizeof(struct in6_addr
),
266 if (tb
[IFLA_GENEVE_TTL
])
267 ttl
= rta_getattr_u8(tb
[IFLA_GENEVE_TTL
]);
268 if (is_json_context() || ttl
)
269 print_uint(PRINT_ANY
, "ttl", "ttl %u ", ttl
);
271 print_string(PRINT_FP
, NULL
, "ttl %s ", "inherit");
273 if (tb
[IFLA_GENEVE_TOS
])
274 tos
= rta_getattr_u8(tb
[IFLA_GENEVE_TOS
]);
276 if (is_json_context() || tos
!= 1)
277 print_0xhex(PRINT_ANY
, "tos", "tos 0x%x ", tos
);
279 print_string(PRINT_FP
, NULL
, "tos %s ", "inherit");
282 if (tb
[IFLA_GENEVE_LABEL
]) {
283 __u32 label
= rta_getattr_u32(tb
[IFLA_GENEVE_LABEL
]);
286 print_0xhex(PRINT_ANY
,
292 if (tb
[IFLA_GENEVE_PORT
])
293 print_uint(PRINT_ANY
,
296 rta_getattr_be16(tb
[IFLA_GENEVE_PORT
]));
298 if (tb
[IFLA_GENEVE_COLLECT_METADATA
])
299 print_bool(PRINT_ANY
, "collect_metadata", "external ", true);
301 if (tb
[IFLA_GENEVE_UDP_CSUM
]) {
302 if (is_json_context()) {
303 print_bool(PRINT_JSON
,
306 rta_getattr_u8(tb
[IFLA_GENEVE_UDP_CSUM
]));
308 if (!rta_getattr_u8(tb
[IFLA_GENEVE_UDP_CSUM
]))
310 fputs("udpcsum ", f
);
314 if (tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX
]) {
315 if (is_json_context()) {
316 print_bool(PRINT_JSON
,
319 rta_getattr_u8(tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX
]));
321 if (!rta_getattr_u8(tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX
]))
323 fputs("udp6zerocsumtx ", f
);
327 if (tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX
]) {
328 if (is_json_context()) {
329 print_bool(PRINT_JSON
,
332 rta_getattr_u8(tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX
]));
334 if (!rta_getattr_u8(tb
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX
]))
336 fputs("udp6zerocsumrx ", f
);
341 static void geneve_print_help(struct link_util
*lu
, int argc
, char **argv
,
347 struct link_util geneve_link_util
= {
349 .maxattr
= IFLA_GENEVE_MAX
,
350 .parse_opt
= geneve_parse_opt
,
351 .print_opt
= geneve_print_opt
,
352 .print_help
= geneve_print_help
,