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Commit | Line | Data |
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237d9e82 HX |
1 | /* |
2 | * link_gre.c gre driver module | |
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: Herbert Xu <herbert@gondor.apana.org.au> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <string.h> | |
14 | #include <net/if.h> | |
237d9e82 HX |
15 | #include <sys/types.h> |
16 | #include <sys/socket.h> | |
17 | #include <arpa/inet.h> | |
18 | ||
1957a322 SH |
19 | #include <linux/ip.h> |
20 | #include <linux/if_tunnel.h> | |
237d9e82 HX |
21 | #include "rt_names.h" |
22 | #include "utils.h" | |
23 | #include "ip_common.h" | |
24 | #include "tunnel.h" | |
25 | ||
561e650e | 26 | static void print_usage(FILE *f) |
27 | { | |
28 | fprintf(f, "Usage: ip link { add | set | change | replace | del } NAME\n"); | |
29 | fprintf(f, " type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n"); | |
30 | fprintf(f, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); | |
31 | fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n"); | |
80c24b09 TH |
32 | fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n"); |
33 | fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n"); | |
858dbb20 | 34 | fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n"); |
561e650e | 35 | fprintf(f, "\n"); |
36 | fprintf(f, "Where: NAME := STRING\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, " KEY := { DOTTED_QUAD | NUMBER }\n"); | |
41 | } | |
42 | ||
237d9e82 HX |
43 | static void usage(void) __attribute__((noreturn)); |
44 | static void usage(void) | |
45 | { | |
561e650e | 46 | print_usage(stderr); |
237d9e82 HX |
47 | exit(-1); |
48 | } | |
49 | ||
50 | static int gre_parse_opt(struct link_util *lu, int argc, char **argv, | |
51 | struct nlmsghdr *n) | |
52 | { | |
72c771b2 HX |
53 | struct { |
54 | struct nlmsghdr n; | |
55 | struct ifinfomsg i; | |
bde5baa5 | 56 | char buf[16384]; |
72c771b2 HX |
57 | } req; |
58 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); | |
59 | struct rtattr *tb[IFLA_MAX + 1]; | |
60 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
61 | struct rtattr *greinfo[IFLA_GRE_MAX + 1]; | |
237d9e82 HX |
62 | __u16 iflags = 0; |
63 | __u16 oflags = 0; | |
64 | unsigned ikey = 0; | |
65 | unsigned okey = 0; | |
66 | unsigned saddr = 0; | |
67 | unsigned daddr = 0; | |
72c771b2 HX |
68 | unsigned link = 0; |
69 | __u8 pmtudisc = 1; | |
70 | __u8 ttl = 0; | |
71 | __u8 tos = 0; | |
72 | int len; | |
80c24b09 TH |
73 | __u16 encaptype = 0; |
74 | __u16 encapflags = 0; | |
75 | __u16 encapsport = 0; | |
76 | __u16 encapdport = 0; | |
72c771b2 HX |
77 | |
78 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
79 | memset(&req, 0, sizeof(req)); | |
80 | ||
81 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)); | |
82 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
83 | req.n.nlmsg_type = RTM_GETLINK; | |
84 | req.i.ifi_family = preferred_family; | |
85 | req.i.ifi_index = ifi->ifi_index; | |
86 | ||
c079e121 | 87 | if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) { |
72c771b2 HX |
88 | get_failed: |
89 | fprintf(stderr, | |
90 | "Failed to get existing tunnel info.\n"); | |
91 | return -1; | |
92 | } | |
93 | ||
94 | len = req.n.nlmsg_len; | |
95 | len -= NLMSG_LENGTH(sizeof(*ifi)); | |
96 | if (len < 0) | |
97 | goto get_failed; | |
98 | ||
99 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len); | |
100 | ||
101 | if (!tb[IFLA_LINKINFO]) | |
102 | goto get_failed; | |
103 | ||
104 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
105 | ||
106 | if (!linkinfo[IFLA_INFO_DATA]) | |
107 | goto get_failed; | |
108 | ||
109 | parse_rtattr_nested(greinfo, IFLA_GRE_MAX, | |
110 | linkinfo[IFLA_INFO_DATA]); | |
111 | ||
112 | if (greinfo[IFLA_GRE_IKEY]) | |
ff24746c | 113 | ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]); |
72c771b2 HX |
114 | |
115 | if (greinfo[IFLA_GRE_OKEY]) | |
ff24746c | 116 | okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]); |
72c771b2 HX |
117 | |
118 | if (greinfo[IFLA_GRE_IFLAGS]) | |
ff24746c | 119 | iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]); |
72c771b2 HX |
120 | |
121 | if (greinfo[IFLA_GRE_OFLAGS]) | |
ff24746c | 122 | oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]); |
72c771b2 HX |
123 | |
124 | if (greinfo[IFLA_GRE_LOCAL]) | |
ff24746c | 125 | saddr = rta_getattr_u32(greinfo[IFLA_GRE_LOCAL]); |
72c771b2 HX |
126 | |
127 | if (greinfo[IFLA_GRE_REMOTE]) | |
ff24746c | 128 | daddr = rta_getattr_u32(greinfo[IFLA_GRE_REMOTE]); |
72c771b2 HX |
129 | |
130 | if (greinfo[IFLA_GRE_PMTUDISC]) | |
ff24746c | 131 | pmtudisc = rta_getattr_u8( |
72c771b2 HX |
132 | greinfo[IFLA_GRE_PMTUDISC]); |
133 | ||
134 | if (greinfo[IFLA_GRE_TTL]) | |
ff24746c | 135 | ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]); |
72c771b2 HX |
136 | |
137 | if (greinfo[IFLA_GRE_TOS]) | |
ff24746c | 138 | tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]); |
72c771b2 HX |
139 | |
140 | if (greinfo[IFLA_GRE_LINK]) | |
ff24746c | 141 | link = rta_getattr_u8(greinfo[IFLA_GRE_LINK]); |
80c24b09 TH |
142 | |
143 | if (greinfo[IFLA_GRE_ENCAP_TYPE]) | |
144 | encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]); | |
145 | if (greinfo[IFLA_GRE_ENCAP_FLAGS]) | |
146 | encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]); | |
147 | if (greinfo[IFLA_GRE_ENCAP_SPORT]) | |
148 | encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]); | |
149 | if (greinfo[IFLA_GRE_ENCAP_DPORT]) | |
150 | encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]); | |
72c771b2 | 151 | } |
237d9e82 HX |
152 | |
153 | while (argc > 0) { | |
154 | if (!matches(*argv, "key")) { | |
155 | unsigned uval; | |
156 | ||
157 | NEXT_ARG(); | |
158 | iflags |= GRE_KEY; | |
159 | oflags |= GRE_KEY; | |
160 | if (strchr(*argv, '.')) | |
161 | uval = get_addr32(*argv); | |
162 | else { | |
163 | if (get_unsigned(&uval, *argv, 0) < 0) { | |
164 | fprintf(stderr, | |
14645ec2 | 165 | "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
166 | exit(-1); |
167 | } | |
168 | uval = htonl(uval); | |
169 | } | |
170 | ||
171 | ikey = okey = uval; | |
172 | } else if (!matches(*argv, "ikey")) { | |
173 | unsigned uval; | |
174 | ||
175 | NEXT_ARG(); | |
176 | iflags |= GRE_KEY; | |
177 | if (strchr(*argv, '.')) | |
178 | uval = get_addr32(*argv); | |
179 | else { | |
180 | if (get_unsigned(&uval, *argv, 0)<0) { | |
14645ec2 | 181 | fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
182 | exit(-1); |
183 | } | |
184 | uval = htonl(uval); | |
185 | } | |
186 | ikey = uval; | |
187 | } else if (!matches(*argv, "okey")) { | |
188 | unsigned uval; | |
189 | ||
190 | NEXT_ARG(); | |
191 | oflags |= GRE_KEY; | |
192 | if (strchr(*argv, '.')) | |
193 | uval = get_addr32(*argv); | |
194 | else { | |
195 | if (get_unsigned(&uval, *argv, 0)<0) { | |
14645ec2 | 196 | fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
197 | exit(-1); |
198 | } | |
199 | uval = htonl(uval); | |
200 | } | |
201 | okey = uval; | |
202 | } else if (!matches(*argv, "seq")) { | |
203 | iflags |= GRE_SEQ; | |
204 | oflags |= GRE_SEQ; | |
205 | } else if (!matches(*argv, "iseq")) { | |
206 | iflags |= GRE_SEQ; | |
207 | } else if (!matches(*argv, "oseq")) { | |
208 | oflags |= GRE_SEQ; | |
209 | } else if (!matches(*argv, "csum")) { | |
210 | iflags |= GRE_CSUM; | |
211 | oflags |= GRE_CSUM; | |
212 | } else if (!matches(*argv, "icsum")) { | |
213 | iflags |= GRE_CSUM; | |
214 | } else if (!matches(*argv, "ocsum")) { | |
215 | oflags |= GRE_CSUM; | |
216 | } else if (!matches(*argv, "nopmtudisc")) { | |
72c771b2 | 217 | pmtudisc = 0; |
237d9e82 | 218 | } else if (!matches(*argv, "pmtudisc")) { |
72c771b2 | 219 | pmtudisc = 1; |
237d9e82 HX |
220 | } else if (!matches(*argv, "remote")) { |
221 | NEXT_ARG(); | |
222 | if (strcmp(*argv, "any")) | |
223 | daddr = get_addr32(*argv); | |
224 | } else if (!matches(*argv, "local")) { | |
225 | NEXT_ARG(); | |
226 | if (strcmp(*argv, "any")) | |
227 | saddr = get_addr32(*argv); | |
228 | } else if (!matches(*argv, "dev")) { | |
237d9e82 | 229 | NEXT_ARG(); |
ea71beac | 230 | link = if_nametoindex(*argv); |
0cb6bb51 CW |
231 | if (link == 0) { |
232 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
233 | *argv); | |
237d9e82 | 234 | exit(-1); |
0cb6bb51 | 235 | } |
237d9e82 HX |
236 | } else if (!matches(*argv, "ttl") || |
237 | !matches(*argv, "hoplimit")) { | |
238 | unsigned uval; | |
237d9e82 HX |
239 | |
240 | NEXT_ARG(); | |
241 | if (strcmp(*argv, "inherit") != 0) { | |
242 | if (get_unsigned(&uval, *argv, 0)) | |
243 | invarg("invalid TTL\n", *argv); | |
244 | if (uval > 255) | |
245 | invarg("TTL must be <= 255\n", *argv); | |
246 | ttl = uval; | |
237d9e82 HX |
247 | } |
248 | } else if (!matches(*argv, "tos") || | |
249 | !matches(*argv, "tclass") || | |
250 | !matches(*argv, "dsfield")) { | |
251 | __u32 uval; | |
237d9e82 HX |
252 | |
253 | NEXT_ARG(); | |
254 | if (strcmp(*argv, "inherit") != 0) { | |
255 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
256 | invarg("bad TOS value", *argv); | |
257 | tos = uval; | |
258 | } else | |
259 | tos = 1; | |
80c24b09 TH |
260 | } else if (strcmp(*argv, "noencap") == 0) { |
261 | encaptype = TUNNEL_ENCAP_NONE; | |
262 | } else if (strcmp(*argv, "encap") == 0) { | |
263 | NEXT_ARG(); | |
264 | if (strcmp(*argv, "fou") == 0) | |
265 | encaptype = TUNNEL_ENCAP_FOU; | |
266 | else if (strcmp(*argv, "gue") == 0) | |
267 | encaptype = TUNNEL_ENCAP_GUE; | |
268 | else if (strcmp(*argv, "none") == 0) | |
269 | encaptype = TUNNEL_ENCAP_NONE; | |
270 | else | |
271 | invarg("Invalid encap type.", *argv); | |
272 | } else if (strcmp(*argv, "encap-sport") == 0) { | |
273 | NEXT_ARG(); | |
274 | if (strcmp(*argv, "auto") == 0) | |
275 | encapsport = 0; | |
276 | else if (get_u16(&encapsport, *argv, 0)) | |
277 | invarg("Invalid source port.", *argv); | |
278 | } else if (strcmp(*argv, "encap-dport") == 0) { | |
279 | NEXT_ARG(); | |
280 | if (get_u16(&encapdport, *argv, 0)) | |
281 | invarg("Invalid destination port.", *argv); | |
282 | } else if (strcmp(*argv, "encap-csum") == 0) { | |
283 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM; | |
284 | } else if (strcmp(*argv, "noencap-csum") == 0) { | |
285 | encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM; | |
286 | } else if (strcmp(*argv, "encap-udp6-csum") == 0) { | |
287 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM6; | |
288 | } else if (strcmp(*argv, "noencap-udp6-csum") == 0) { | |
289 | encapflags |= ~TUNNEL_ENCAP_FLAG_CSUM6; | |
858dbb20 TH |
290 | } else if (strcmp(*argv, "encap-remcsum") == 0) { |
291 | encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM; | |
292 | } else if (strcmp(*argv, "noencap-remcsum") == 0) { | |
293 | encapflags |= ~TUNNEL_ENCAP_FLAG_REMCSUM; | |
0612519e | 294 | } else |
237d9e82 HX |
295 | usage(); |
296 | argc--; argv++; | |
297 | } | |
298 | ||
299 | if (!ikey && IN_MULTICAST(ntohl(daddr))) { | |
300 | ikey = daddr; | |
301 | iflags |= GRE_KEY; | |
302 | } | |
303 | if (!okey && IN_MULTICAST(ntohl(daddr))) { | |
304 | okey = daddr; | |
305 | oflags |= GRE_KEY; | |
306 | } | |
307 | if (IN_MULTICAST(ntohl(daddr)) && !saddr) { | |
14645ec2 | 308 | fprintf(stderr, "A broadcast tunnel requires a source address.\n"); |
237d9e82 HX |
309 | return -1; |
310 | } | |
311 | ||
312 | addattr32(n, 1024, IFLA_GRE_IKEY, ikey); | |
313 | addattr32(n, 1024, IFLA_GRE_OKEY, okey); | |
314 | addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2); | |
315 | addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2); | |
316 | addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4); | |
317 | addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4); | |
72c771b2 HX |
318 | addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1); |
319 | if (link) | |
320 | addattr32(n, 1024, IFLA_GRE_LINK, link); | |
321 | addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1); | |
322 | addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1); | |
237d9e82 | 323 | |
80c24b09 TH |
324 | addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype); |
325 | addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags); | |
326 | addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport)); | |
327 | addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport)); | |
328 | ||
237d9e82 HX |
329 | return 0; |
330 | } | |
331 | ||
332 | static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
333 | { | |
334 | char s1[1024]; | |
335 | char s2[64]; | |
336 | const char *local = "any"; | |
337 | const char *remote = "any"; | |
338 | unsigned iflags = 0; | |
339 | unsigned oflags = 0; | |
340 | ||
341 | if (!tb) | |
342 | return; | |
343 | ||
344 | if (tb[IFLA_GRE_REMOTE]) { | |
ff24746c | 345 | unsigned addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]); |
237d9e82 HX |
346 | |
347 | if (addr) | |
348 | remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); | |
349 | } | |
350 | ||
351 | fprintf(f, "remote %s ", remote); | |
352 | ||
353 | if (tb[IFLA_GRE_LOCAL]) { | |
ff24746c | 354 | unsigned addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]); |
237d9e82 HX |
355 | |
356 | if (addr) | |
357 | local = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); | |
358 | } | |
359 | ||
360 | fprintf(f, "local %s ", local); | |
361 | ||
ff24746c SH |
362 | if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) { |
363 | unsigned link = rta_getattr_u32(tb[IFLA_GRE_LINK]); | |
ea71beac | 364 | const char *n = if_indextoname(link, s2); |
237d9e82 HX |
365 | |
366 | if (n) | |
367 | fprintf(f, "dev %s ", n); | |
368 | else | |
369 | fprintf(f, "dev %u ", link); | |
370 | } | |
371 | ||
ff24746c SH |
372 | if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL])) |
373 | fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_GRE_TTL])); | |
237d9e82 HX |
374 | else |
375 | fprintf(f, "ttl inherit "); | |
376 | ||
ff24746c SH |
377 | if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) { |
378 | int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]); | |
237d9e82 HX |
379 | |
380 | fputs("tos ", f); | |
381 | if (tos == 1) | |
382 | fputs("inherit ", f); | |
383 | else | |
384 | fprintf(f, "0x%x ", tos); | |
385 | } | |
386 | ||
387 | if (tb[IFLA_GRE_PMTUDISC] && | |
ff24746c | 388 | !rta_getattr_u8(tb[IFLA_GRE_PMTUDISC])) |
237d9e82 HX |
389 | fputs("nopmtudisc ", f); |
390 | ||
391 | if (tb[IFLA_GRE_IFLAGS]) | |
ff24746c | 392 | iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]); |
237d9e82 HX |
393 | |
394 | if (tb[IFLA_GRE_OFLAGS]) | |
ff24746c | 395 | oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]); |
237d9e82 | 396 | |
71816553 | 397 | if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) { |
237d9e82 HX |
398 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2)); |
399 | fprintf(f, "ikey %s ", s2); | |
400 | } | |
401 | ||
71816553 | 402 | if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) { |
237d9e82 | 403 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2)); |
71816553 | 404 | fprintf(f, "okey %s ", s2); |
237d9e82 HX |
405 | } |
406 | ||
407 | if (iflags & GRE_SEQ) | |
408 | fputs("iseq ", f); | |
409 | if (oflags & GRE_SEQ) | |
410 | fputs("oseq ", f); | |
411 | if (iflags & GRE_CSUM) | |
412 | fputs("icsum ", f); | |
413 | if (oflags & GRE_CSUM) | |
414 | fputs("ocsum ", f); | |
80c24b09 TH |
415 | |
416 | if (tb[IFLA_GRE_ENCAP_TYPE] && | |
417 | *(__u16 *)RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) { | |
418 | __u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]); | |
419 | __u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]); | |
420 | __u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]); | |
421 | __u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]); | |
422 | ||
423 | fputs("encap ", f); | |
424 | switch (type) { | |
425 | case TUNNEL_ENCAP_FOU: | |
426 | fputs("fou ", f); | |
427 | break; | |
428 | case TUNNEL_ENCAP_GUE: | |
429 | fputs("gue ", f); | |
430 | break; | |
431 | default: | |
432 | fputs("unknown ", f); | |
433 | break; | |
434 | } | |
435 | ||
436 | if (sport == 0) | |
437 | fputs("encap-sport auto ", f); | |
438 | else | |
439 | fprintf(f, "encap-sport %u", ntohs(sport)); | |
440 | ||
441 | fprintf(f, "encap-dport %u ", ntohs(dport)); | |
442 | ||
443 | if (flags & TUNNEL_ENCAP_FLAG_CSUM) | |
444 | fputs("encap-csum ", f); | |
445 | else | |
446 | fputs("noencap-csum ", f); | |
447 | ||
448 | if (flags & TUNNEL_ENCAP_FLAG_CSUM6) | |
449 | fputs("encap-csum6 ", f); | |
450 | else | |
451 | fputs("noencap-csum6 ", f); | |
858dbb20 TH |
452 | |
453 | if (flags & TUNNEL_ENCAP_FLAG_REMCSUM) | |
454 | fputs("encap-remcsum ", f); | |
455 | else | |
456 | fputs("noencap-remcsum ", f); | |
80c24b09 | 457 | } |
237d9e82 HX |
458 | } |
459 | ||
561e650e | 460 | static void gre_print_help(struct link_util *lu, int argc, char **argv, |
461 | FILE *f) | |
462 | { | |
463 | print_usage(f); | |
464 | } | |
465 | ||
237d9e82 HX |
466 | struct link_util gre_link_util = { |
467 | .id = "gre", | |
468 | .maxattr = IFLA_GRE_MAX, | |
469 | .parse_opt = gre_parse_opt, | |
470 | .print_opt = gre_print_opt, | |
561e650e | 471 | .print_help = gre_print_help, |
237d9e82 HX |
472 | }; |
473 | ||
474 | struct link_util gretap_link_util = { | |
475 | .id = "gretap", | |
476 | .maxattr = IFLA_GRE_MAX, | |
477 | .parse_opt = gre_parse_opt, | |
478 | .print_opt = gre_print_opt, | |
561e650e | 479 | .print_help = gre_print_help, |
237d9e82 | 480 | }; |