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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; | |
56f5daac SH |
64 | unsigned int ikey = 0; |
65 | unsigned int okey = 0; | |
66 | unsigned int saddr = 0; | |
67 | unsigned int daddr = 0; | |
68 | unsigned int link = 0; | |
72c771b2 HX |
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; | |
926b39e1 | 77 | __u8 metadata = 0; |
72c771b2 HX |
78 | |
79 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
80 | memset(&req, 0, sizeof(req)); | |
81 | ||
82 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)); | |
83 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
84 | req.n.nlmsg_type = RTM_GETLINK; | |
85 | req.i.ifi_family = preferred_family; | |
86 | req.i.ifi_index = ifi->ifi_index; | |
87 | ||
c079e121 | 88 | if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) { |
72c771b2 HX |
89 | get_failed: |
90 | fprintf(stderr, | |
91 | "Failed to get existing tunnel info.\n"); | |
92 | return -1; | |
93 | } | |
94 | ||
95 | len = req.n.nlmsg_len; | |
96 | len -= NLMSG_LENGTH(sizeof(*ifi)); | |
97 | if (len < 0) | |
98 | goto get_failed; | |
99 | ||
100 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len); | |
101 | ||
102 | if (!tb[IFLA_LINKINFO]) | |
103 | goto get_failed; | |
104 | ||
105 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
106 | ||
107 | if (!linkinfo[IFLA_INFO_DATA]) | |
108 | goto get_failed; | |
109 | ||
110 | parse_rtattr_nested(greinfo, IFLA_GRE_MAX, | |
111 | linkinfo[IFLA_INFO_DATA]); | |
112 | ||
113 | if (greinfo[IFLA_GRE_IKEY]) | |
ff24746c | 114 | ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]); |
72c771b2 HX |
115 | |
116 | if (greinfo[IFLA_GRE_OKEY]) | |
ff24746c | 117 | okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]); |
72c771b2 HX |
118 | |
119 | if (greinfo[IFLA_GRE_IFLAGS]) | |
ff24746c | 120 | iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]); |
72c771b2 HX |
121 | |
122 | if (greinfo[IFLA_GRE_OFLAGS]) | |
ff24746c | 123 | oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]); |
72c771b2 HX |
124 | |
125 | if (greinfo[IFLA_GRE_LOCAL]) | |
ff24746c | 126 | saddr = rta_getattr_u32(greinfo[IFLA_GRE_LOCAL]); |
72c771b2 HX |
127 | |
128 | if (greinfo[IFLA_GRE_REMOTE]) | |
ff24746c | 129 | daddr = rta_getattr_u32(greinfo[IFLA_GRE_REMOTE]); |
72c771b2 HX |
130 | |
131 | if (greinfo[IFLA_GRE_PMTUDISC]) | |
ff24746c | 132 | pmtudisc = rta_getattr_u8( |
72c771b2 HX |
133 | greinfo[IFLA_GRE_PMTUDISC]); |
134 | ||
135 | if (greinfo[IFLA_GRE_TTL]) | |
ff24746c | 136 | ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]); |
72c771b2 HX |
137 | |
138 | if (greinfo[IFLA_GRE_TOS]) | |
ff24746c | 139 | tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]); |
72c771b2 HX |
140 | |
141 | if (greinfo[IFLA_GRE_LINK]) | |
ff24746c | 142 | link = rta_getattr_u8(greinfo[IFLA_GRE_LINK]); |
80c24b09 TH |
143 | |
144 | if (greinfo[IFLA_GRE_ENCAP_TYPE]) | |
145 | encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]); | |
146 | if (greinfo[IFLA_GRE_ENCAP_FLAGS]) | |
147 | encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]); | |
148 | if (greinfo[IFLA_GRE_ENCAP_SPORT]) | |
149 | encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]); | |
150 | if (greinfo[IFLA_GRE_ENCAP_DPORT]) | |
151 | encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]); | |
926b39e1 PA |
152 | |
153 | if (greinfo[IFLA_GRE_COLLECT_METADATA]) | |
154 | metadata = 1; | |
72c771b2 | 155 | } |
237d9e82 HX |
156 | |
157 | while (argc > 0) { | |
158 | if (!matches(*argv, "key")) { | |
56f5daac | 159 | unsigned int uval; |
237d9e82 HX |
160 | |
161 | NEXT_ARG(); | |
162 | iflags |= GRE_KEY; | |
163 | oflags |= GRE_KEY; | |
164 | if (strchr(*argv, '.')) | |
165 | uval = get_addr32(*argv); | |
166 | else { | |
167 | if (get_unsigned(&uval, *argv, 0) < 0) { | |
168 | fprintf(stderr, | |
14645ec2 | 169 | "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
170 | exit(-1); |
171 | } | |
172 | uval = htonl(uval); | |
173 | } | |
174 | ||
175 | ikey = okey = uval; | |
176 | } else if (!matches(*argv, "ikey")) { | |
56f5daac | 177 | unsigned int uval; |
237d9e82 HX |
178 | |
179 | NEXT_ARG(); | |
180 | iflags |= GRE_KEY; | |
181 | if (strchr(*argv, '.')) | |
182 | uval = get_addr32(*argv); | |
183 | else { | |
56f5daac | 184 | if (get_unsigned(&uval, *argv, 0) < 0) { |
14645ec2 | 185 | fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
186 | exit(-1); |
187 | } | |
188 | uval = htonl(uval); | |
189 | } | |
190 | ikey = uval; | |
191 | } else if (!matches(*argv, "okey")) { | |
56f5daac | 192 | unsigned int uval; |
237d9e82 HX |
193 | |
194 | NEXT_ARG(); | |
195 | oflags |= GRE_KEY; | |
196 | if (strchr(*argv, '.')) | |
197 | uval = get_addr32(*argv); | |
198 | else { | |
56f5daac | 199 | if (get_unsigned(&uval, *argv, 0) < 0) { |
14645ec2 | 200 | fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv); |
237d9e82 HX |
201 | exit(-1); |
202 | } | |
203 | uval = htonl(uval); | |
204 | } | |
205 | okey = uval; | |
206 | } else if (!matches(*argv, "seq")) { | |
207 | iflags |= GRE_SEQ; | |
208 | oflags |= GRE_SEQ; | |
209 | } else if (!matches(*argv, "iseq")) { | |
210 | iflags |= GRE_SEQ; | |
211 | } else if (!matches(*argv, "oseq")) { | |
212 | oflags |= GRE_SEQ; | |
213 | } else if (!matches(*argv, "csum")) { | |
214 | iflags |= GRE_CSUM; | |
215 | oflags |= GRE_CSUM; | |
216 | } else if (!matches(*argv, "icsum")) { | |
217 | iflags |= GRE_CSUM; | |
218 | } else if (!matches(*argv, "ocsum")) { | |
219 | oflags |= GRE_CSUM; | |
220 | } else if (!matches(*argv, "nopmtudisc")) { | |
72c771b2 | 221 | pmtudisc = 0; |
237d9e82 | 222 | } else if (!matches(*argv, "pmtudisc")) { |
72c771b2 | 223 | pmtudisc = 1; |
237d9e82 HX |
224 | } else if (!matches(*argv, "remote")) { |
225 | NEXT_ARG(); | |
226 | if (strcmp(*argv, "any")) | |
227 | daddr = get_addr32(*argv); | |
228 | } else if (!matches(*argv, "local")) { | |
229 | NEXT_ARG(); | |
230 | if (strcmp(*argv, "any")) | |
231 | saddr = get_addr32(*argv); | |
232 | } else if (!matches(*argv, "dev")) { | |
237d9e82 | 233 | NEXT_ARG(); |
ea71beac | 234 | link = if_nametoindex(*argv); |
0cb6bb51 CW |
235 | if (link == 0) { |
236 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
237 | *argv); | |
237d9e82 | 238 | exit(-1); |
0cb6bb51 | 239 | } |
237d9e82 HX |
240 | } else if (!matches(*argv, "ttl") || |
241 | !matches(*argv, "hoplimit")) { | |
56f5daac | 242 | unsigned int uval; |
237d9e82 HX |
243 | |
244 | NEXT_ARG(); | |
245 | if (strcmp(*argv, "inherit") != 0) { | |
246 | if (get_unsigned(&uval, *argv, 0)) | |
247 | invarg("invalid TTL\n", *argv); | |
248 | if (uval > 255) | |
249 | invarg("TTL must be <= 255\n", *argv); | |
250 | ttl = uval; | |
237d9e82 HX |
251 | } |
252 | } else if (!matches(*argv, "tos") || | |
253 | !matches(*argv, "tclass") || | |
254 | !matches(*argv, "dsfield")) { | |
255 | __u32 uval; | |
237d9e82 HX |
256 | |
257 | NEXT_ARG(); | |
258 | if (strcmp(*argv, "inherit") != 0) { | |
259 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
260 | invarg("bad TOS value", *argv); | |
261 | tos = uval; | |
262 | } else | |
263 | tos = 1; | |
80c24b09 TH |
264 | } else if (strcmp(*argv, "noencap") == 0) { |
265 | encaptype = TUNNEL_ENCAP_NONE; | |
266 | } else if (strcmp(*argv, "encap") == 0) { | |
267 | NEXT_ARG(); | |
268 | if (strcmp(*argv, "fou") == 0) | |
269 | encaptype = TUNNEL_ENCAP_FOU; | |
270 | else if (strcmp(*argv, "gue") == 0) | |
271 | encaptype = TUNNEL_ENCAP_GUE; | |
272 | else if (strcmp(*argv, "none") == 0) | |
273 | encaptype = TUNNEL_ENCAP_NONE; | |
274 | else | |
275 | invarg("Invalid encap type.", *argv); | |
276 | } else if (strcmp(*argv, "encap-sport") == 0) { | |
277 | NEXT_ARG(); | |
278 | if (strcmp(*argv, "auto") == 0) | |
279 | encapsport = 0; | |
280 | else if (get_u16(&encapsport, *argv, 0)) | |
281 | invarg("Invalid source port.", *argv); | |
282 | } else if (strcmp(*argv, "encap-dport") == 0) { | |
283 | NEXT_ARG(); | |
284 | if (get_u16(&encapdport, *argv, 0)) | |
285 | invarg("Invalid destination port.", *argv); | |
286 | } else if (strcmp(*argv, "encap-csum") == 0) { | |
287 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM; | |
288 | } else if (strcmp(*argv, "noencap-csum") == 0) { | |
289 | encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM; | |
290 | } else if (strcmp(*argv, "encap-udp6-csum") == 0) { | |
291 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM6; | |
292 | } else if (strcmp(*argv, "noencap-udp6-csum") == 0) { | |
293 | encapflags |= ~TUNNEL_ENCAP_FLAG_CSUM6; | |
858dbb20 TH |
294 | } else if (strcmp(*argv, "encap-remcsum") == 0) { |
295 | encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM; | |
296 | } else if (strcmp(*argv, "noencap-remcsum") == 0) { | |
297 | encapflags |= ~TUNNEL_ENCAP_FLAG_REMCSUM; | |
926b39e1 PA |
298 | } else if (strcmp(*argv, "external") == 0) { |
299 | metadata = 1; | |
0612519e | 300 | } else |
237d9e82 HX |
301 | usage(); |
302 | argc--; argv++; | |
303 | } | |
304 | ||
305 | if (!ikey && IN_MULTICAST(ntohl(daddr))) { | |
306 | ikey = daddr; | |
307 | iflags |= GRE_KEY; | |
308 | } | |
309 | if (!okey && IN_MULTICAST(ntohl(daddr))) { | |
310 | okey = daddr; | |
311 | oflags |= GRE_KEY; | |
312 | } | |
313 | if (IN_MULTICAST(ntohl(daddr)) && !saddr) { | |
14645ec2 | 314 | fprintf(stderr, "A broadcast tunnel requires a source address.\n"); |
237d9e82 HX |
315 | return -1; |
316 | } | |
317 | ||
318 | addattr32(n, 1024, IFLA_GRE_IKEY, ikey); | |
319 | addattr32(n, 1024, IFLA_GRE_OKEY, okey); | |
320 | addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2); | |
321 | addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2); | |
322 | addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4); | |
323 | addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4); | |
72c771b2 HX |
324 | addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1); |
325 | if (link) | |
326 | addattr32(n, 1024, IFLA_GRE_LINK, link); | |
327 | addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1); | |
328 | addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1); | |
237d9e82 | 329 | |
80c24b09 TH |
330 | addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype); |
331 | addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags); | |
332 | addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport)); | |
333 | addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport)); | |
926b39e1 PA |
334 | if (metadata) |
335 | addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0); | |
80c24b09 | 336 | |
237d9e82 HX |
337 | return 0; |
338 | } | |
339 | ||
340 | static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
341 | { | |
237d9e82 HX |
342 | char s2[64]; |
343 | const char *local = "any"; | |
344 | const char *remote = "any"; | |
56f5daac SH |
345 | unsigned int iflags = 0; |
346 | unsigned int oflags = 0; | |
237d9e82 HX |
347 | |
348 | if (!tb) | |
349 | return; | |
350 | ||
351 | if (tb[IFLA_GRE_REMOTE]) { | |
56f5daac | 352 | unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]); |
237d9e82 HX |
353 | |
354 | if (addr) | |
a418e451 | 355 | remote = format_host(AF_INET, 4, &addr); |
237d9e82 HX |
356 | } |
357 | ||
358 | fprintf(f, "remote %s ", remote); | |
359 | ||
360 | if (tb[IFLA_GRE_LOCAL]) { | |
56f5daac | 361 | unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]); |
237d9e82 HX |
362 | |
363 | if (addr) | |
a418e451 | 364 | local = format_host(AF_INET, 4, &addr); |
237d9e82 HX |
365 | } |
366 | ||
367 | fprintf(f, "local %s ", local); | |
368 | ||
ff24746c | 369 | if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) { |
56f5daac | 370 | unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]); |
ea71beac | 371 | const char *n = if_indextoname(link, s2); |
237d9e82 HX |
372 | |
373 | if (n) | |
374 | fprintf(f, "dev %s ", n); | |
375 | else | |
376 | fprintf(f, "dev %u ", link); | |
377 | } | |
378 | ||
ff24746c SH |
379 | if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL])) |
380 | fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_GRE_TTL])); | |
237d9e82 HX |
381 | else |
382 | fprintf(f, "ttl inherit "); | |
383 | ||
ff24746c SH |
384 | if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) { |
385 | int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]); | |
237d9e82 HX |
386 | |
387 | fputs("tos ", f); | |
388 | if (tos == 1) | |
389 | fputs("inherit ", f); | |
390 | else | |
391 | fprintf(f, "0x%x ", tos); | |
392 | } | |
393 | ||
394 | if (tb[IFLA_GRE_PMTUDISC] && | |
ff24746c | 395 | !rta_getattr_u8(tb[IFLA_GRE_PMTUDISC])) |
237d9e82 HX |
396 | fputs("nopmtudisc ", f); |
397 | ||
398 | if (tb[IFLA_GRE_IFLAGS]) | |
ff24746c | 399 | iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]); |
237d9e82 HX |
400 | |
401 | if (tb[IFLA_GRE_OFLAGS]) | |
ff24746c | 402 | oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]); |
237d9e82 | 403 | |
71816553 | 404 | if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) { |
237d9e82 HX |
405 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2)); |
406 | fprintf(f, "ikey %s ", s2); | |
407 | } | |
408 | ||
71816553 | 409 | if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) { |
237d9e82 | 410 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2)); |
71816553 | 411 | fprintf(f, "okey %s ", s2); |
237d9e82 HX |
412 | } |
413 | ||
414 | if (iflags & GRE_SEQ) | |
415 | fputs("iseq ", f); | |
416 | if (oflags & GRE_SEQ) | |
417 | fputs("oseq ", f); | |
418 | if (iflags & GRE_CSUM) | |
419 | fputs("icsum ", f); | |
420 | if (oflags & GRE_CSUM) | |
421 | fputs("ocsum ", f); | |
80c24b09 | 422 | |
926b39e1 PA |
423 | if (tb[IFLA_GRE_COLLECT_METADATA]) |
424 | fputs("external ", f); | |
425 | ||
80c24b09 TH |
426 | if (tb[IFLA_GRE_ENCAP_TYPE] && |
427 | *(__u16 *)RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) { | |
428 | __u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]); | |
429 | __u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]); | |
430 | __u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]); | |
431 | __u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]); | |
432 | ||
433 | fputs("encap ", f); | |
434 | switch (type) { | |
435 | case TUNNEL_ENCAP_FOU: | |
436 | fputs("fou ", f); | |
437 | break; | |
438 | case TUNNEL_ENCAP_GUE: | |
439 | fputs("gue ", f); | |
440 | break; | |
441 | default: | |
442 | fputs("unknown ", f); | |
443 | break; | |
444 | } | |
445 | ||
446 | if (sport == 0) | |
447 | fputs("encap-sport auto ", f); | |
448 | else | |
449 | fprintf(f, "encap-sport %u", ntohs(sport)); | |
450 | ||
451 | fprintf(f, "encap-dport %u ", ntohs(dport)); | |
452 | ||
453 | if (flags & TUNNEL_ENCAP_FLAG_CSUM) | |
454 | fputs("encap-csum ", f); | |
455 | else | |
456 | fputs("noencap-csum ", f); | |
457 | ||
458 | if (flags & TUNNEL_ENCAP_FLAG_CSUM6) | |
459 | fputs("encap-csum6 ", f); | |
460 | else | |
461 | fputs("noencap-csum6 ", f); | |
858dbb20 TH |
462 | |
463 | if (flags & TUNNEL_ENCAP_FLAG_REMCSUM) | |
464 | fputs("encap-remcsum ", f); | |
465 | else | |
466 | fputs("noencap-remcsum ", f); | |
80c24b09 | 467 | } |
237d9e82 HX |
468 | } |
469 | ||
561e650e | 470 | static void gre_print_help(struct link_util *lu, int argc, char **argv, |
471 | FILE *f) | |
472 | { | |
473 | print_usage(f); | |
474 | } | |
475 | ||
237d9e82 HX |
476 | struct link_util gre_link_util = { |
477 | .id = "gre", | |
478 | .maxattr = IFLA_GRE_MAX, | |
479 | .parse_opt = gre_parse_opt, | |
480 | .print_opt = gre_print_opt, | |
561e650e | 481 | .print_help = gre_print_help, |
237d9e82 HX |
482 | }; |
483 | ||
484 | struct link_util gretap_link_util = { | |
485 | .id = "gretap", | |
486 | .maxattr = IFLA_GRE_MAX, | |
487 | .parse_opt = gre_parse_opt, | |
488 | .print_opt = gre_print_opt, | |
561e650e | 489 | .print_help = gre_print_help, |
237d9e82 | 490 | }; |