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2f7fbec2 SK |
1 | /* |
2 | * link_vti6.c VTI 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 | * Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI | |
11 | * Steffen Klassert <steffen.klassert@secunet.com> Modified link_vti.c for IPv6 | |
12 | */ | |
13 | ||
14 | #include <string.h> | |
15 | #include <net/if.h> | |
16 | #include <sys/types.h> | |
17 | #include <sys/socket.h> | |
18 | #include <arpa/inet.h> | |
19 | ||
20 | #include <linux/ip.h> | |
21 | #include <linux/if_tunnel.h> | |
22 | #include "rt_names.h" | |
23 | #include "utils.h" | |
24 | #include "ip_common.h" | |
25 | #include "tunnel.h" | |
26 | ||
27 | ||
28 | static void usage(void) __attribute__((noreturn)); | |
29 | static void usage(void) | |
30 | { | |
31 | fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n"); | |
32 | fprintf(stderr, " type { vti6 } [ remote ADDR ] [ local ADDR ]\n"); | |
33 | fprintf(stderr, " [ [i|o]key KEY ]\n"); | |
34 | fprintf(stderr, " [ dev PHYS_DEV ]\n"); | |
ad4b1425 | 35 | fprintf(stderr, " [ fwmark MARK ]\n"); |
2f7fbec2 SK |
36 | fprintf(stderr, "\n"); |
37 | fprintf(stderr, "Where: NAME := STRING\n"); | |
38 | fprintf(stderr, " ADDR := { IPV6_ADDRESS }\n"); | |
39 | fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); | |
ad4b1425 | 40 | fprintf(stderr, " MARK := { 0x0..0xffffffff }\n"); |
2f7fbec2 SK |
41 | exit(-1); |
42 | } | |
43 | ||
44 | static int vti6_parse_opt(struct link_util *lu, int argc, char **argv, | |
45 | struct nlmsghdr *n) | |
46 | { | |
d17b136f | 47 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); |
2f7fbec2 SK |
48 | struct { |
49 | struct nlmsghdr n; | |
50 | struct ifinfomsg i; | |
d17b136f PS |
51 | } req = { |
52 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)), | |
53 | .n.nlmsg_flags = NLM_F_REQUEST, | |
54 | .n.nlmsg_type = RTM_GETLINK, | |
55 | .i.ifi_family = preferred_family, | |
56 | .i.ifi_index = ifi->ifi_index, | |
57 | }; | |
86bf43c7 | 58 | struct nlmsghdr *answer = NULL; |
2f7fbec2 SK |
59 | struct rtattr *tb[IFLA_MAX + 1]; |
60 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
61 | struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; | |
2a80154f SH |
62 | struct in6_addr saddr = IN6ADDR_ANY_INIT; |
63 | struct in6_addr daddr = IN6ADDR_ANY_INIT; | |
56f5daac SH |
64 | unsigned int ikey = 0; |
65 | unsigned int okey = 0; | |
66 | unsigned int link = 0; | |
ad4b1425 | 67 | __u32 fwmark = 0; |
2f7fbec2 SK |
68 | int len; |
69 | ||
70 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
86bf43c7 | 71 | if (rtnl_talk(&rth, &req.n, &answer) < 0) { |
2f7fbec2 SK |
72 | get_failed: |
73 | fprintf(stderr, | |
74 | "Failed to get existing tunnel info.\n"); | |
86bf43c7 | 75 | free(answer); |
2f7fbec2 SK |
76 | return -1; |
77 | } | |
78 | ||
86bf43c7 | 79 | len = answer->nlmsg_len; |
2f7fbec2 SK |
80 | len -= NLMSG_LENGTH(sizeof(*ifi)); |
81 | if (len < 0) | |
82 | goto get_failed; | |
83 | ||
86bf43c7 | 84 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len); |
2f7fbec2 SK |
85 | |
86 | if (!tb[IFLA_LINKINFO]) | |
87 | goto get_failed; | |
88 | ||
89 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
90 | ||
91 | if (!linkinfo[IFLA_INFO_DATA]) | |
92 | goto get_failed; | |
93 | ||
94 | parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, | |
95 | linkinfo[IFLA_INFO_DATA]); | |
96 | ||
97 | if (vtiinfo[IFLA_VTI_IKEY]) | |
98 | ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); | |
99 | ||
100 | if (vtiinfo[IFLA_VTI_OKEY]) | |
101 | okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); | |
102 | ||
103 | if (vtiinfo[IFLA_VTI_LOCAL]) | |
104 | memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr)); | |
105 | ||
106 | if (vtiinfo[IFLA_VTI_REMOTE]) | |
107 | memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr)); | |
108 | ||
109 | if (vtiinfo[IFLA_VTI_LINK]) | |
110 | link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]); | |
ad4b1425 CG |
111 | |
112 | if (vtiinfo[IFLA_VTI_FWMARK]) | |
113 | fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]); | |
86bf43c7 HL |
114 | |
115 | free(answer); | |
2f7fbec2 SK |
116 | } |
117 | ||
118 | while (argc > 0) { | |
119 | if (!matches(*argv, "key")) { | |
56f5daac | 120 | unsigned int uval; |
2f7fbec2 SK |
121 | |
122 | NEXT_ARG(); | |
123 | if (strchr(*argv, '.')) | |
124 | uval = get_addr32(*argv); | |
125 | else { | |
126 | if (get_unsigned(&uval, *argv, 0) < 0) { | |
127 | fprintf(stderr, | |
128 | "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv); | |
129 | exit(-1); | |
130 | } | |
131 | uval = htonl(uval); | |
132 | } | |
133 | ||
134 | ikey = okey = uval; | |
135 | } else if (!matches(*argv, "ikey")) { | |
56f5daac | 136 | unsigned int uval; |
2f7fbec2 SK |
137 | |
138 | NEXT_ARG(); | |
139 | if (strchr(*argv, '.')) | |
140 | uval = get_addr32(*argv); | |
141 | else { | |
142 | if (get_unsigned(&uval, *argv, 0) < 0) { | |
143 | fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv); | |
144 | exit(-1); | |
145 | } | |
146 | uval = htonl(uval); | |
147 | } | |
148 | ikey = uval; | |
149 | } else if (!matches(*argv, "okey")) { | |
56f5daac | 150 | unsigned int uval; |
2f7fbec2 SK |
151 | |
152 | NEXT_ARG(); | |
153 | if (strchr(*argv, '.')) | |
154 | uval = get_addr32(*argv); | |
155 | else { | |
156 | if (get_unsigned(&uval, *argv, 0) < 0) { | |
157 | fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv); | |
158 | exit(-1); | |
159 | } | |
160 | uval = htonl(uval); | |
161 | } | |
162 | okey = uval; | |
163 | } else if (!matches(*argv, "remote")) { | |
164 | NEXT_ARG(); | |
165 | if (!strcmp(*argv, "any")) { | |
166 | fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv); | |
167 | exit(-1); | |
168 | } else { | |
169 | inet_prefix addr; | |
56f5daac | 170 | |
2f7fbec2 SK |
171 | get_prefix(&addr, *argv, AF_INET6); |
172 | memcpy(&daddr, addr.data, addr.bytelen); | |
173 | } | |
174 | } else if (!matches(*argv, "local")) { | |
175 | NEXT_ARG(); | |
176 | if (!strcmp(*argv, "any")) { | |
177 | fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv); | |
178 | exit(-1); | |
179 | } else { | |
180 | inet_prefix addr; | |
56f5daac | 181 | |
2f7fbec2 SK |
182 | get_prefix(&addr, *argv, AF_INET6); |
183 | memcpy(&saddr, addr.data, addr.bytelen); | |
184 | } | |
185 | } else if (!matches(*argv, "dev")) { | |
186 | NEXT_ARG(); | |
187 | link = if_nametoindex(*argv); | |
188 | if (link == 0) | |
189 | exit(-1); | |
ad4b1425 CG |
190 | } else if (strcmp(*argv, "fwmark") == 0) { |
191 | NEXT_ARG(); | |
192 | if (get_u32(&fwmark, *argv, 0)) | |
193 | invarg("invalid fwmark\n", *argv); | |
2f7fbec2 SK |
194 | } else |
195 | usage(); | |
196 | argc--; argv++; | |
197 | } | |
198 | ||
199 | addattr32(n, 1024, IFLA_VTI_IKEY, ikey); | |
200 | addattr32(n, 1024, IFLA_VTI_OKEY, okey); | |
2a80154f SH |
201 | |
202 | if (memcmp(&saddr, &in6addr_any, sizeof(in6addr_any))) | |
203 | addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr)); | |
204 | if (memcmp(&daddr, &in6addr_any, sizeof(in6addr_any))) | |
205 | addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr)); | |
ad4b1425 | 206 | addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark); |
2f7fbec2 SK |
207 | if (link) |
208 | addattr32(n, 1024, IFLA_VTI_LINK, link); | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
214 | { | |
2f7fbec2 SK |
215 | const char *local = "any"; |
216 | const char *remote = "any"; | |
217 | struct in6_addr saddr; | |
218 | struct in6_addr daddr; | |
9f1370c0 SH |
219 | unsigned int link; |
220 | char s2[64]; | |
2f7fbec2 SK |
221 | |
222 | if (!tb) | |
223 | return; | |
224 | ||
225 | if (tb[IFLA_VTI_REMOTE]) { | |
226 | memcpy(&daddr, RTA_DATA(tb[IFLA_VTI_REMOTE]), sizeof(daddr)); | |
227 | ||
a418e451 | 228 | remote = format_host(AF_INET6, 16, &daddr); |
2f7fbec2 SK |
229 | } |
230 | ||
063dd06c | 231 | print_string(PRINT_ANY, "remote", "remote %s ", remote); |
2f7fbec2 SK |
232 | |
233 | if (tb[IFLA_VTI_LOCAL]) { | |
234 | memcpy(&saddr, RTA_DATA(tb[IFLA_VTI_LOCAL]), sizeof(saddr)); | |
235 | ||
a418e451 | 236 | local = format_host(AF_INET6, 16, &saddr); |
2f7fbec2 SK |
237 | } |
238 | ||
063dd06c | 239 | print_string(PRINT_ANY, "local", "local %s ", local); |
2f7fbec2 | 240 | |
9f1370c0 | 241 | if (tb[IFLA_VTI_LINK] && (link = rta_getattr_u32(tb[IFLA_VTI_LINK]))) { |
2f7fbec2 SK |
242 | const char *n = if_indextoname(link, s2); |
243 | ||
244 | if (n) | |
063dd06c | 245 | print_string(PRINT_ANY, "link", "dev %s ", n); |
2f7fbec2 | 246 | else |
063dd06c | 247 | print_uint(PRINT_ANY, "link_index", "dev %u ", link); |
2f7fbec2 SK |
248 | } |
249 | ||
250 | if (tb[IFLA_VTI_IKEY]) { | |
251 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_IKEY]), s2, sizeof(s2)); | |
063dd06c | 252 | print_string(PRINT_ANY, "ikey", "ikey %s ", s2); |
2f7fbec2 SK |
253 | } |
254 | ||
255 | if (tb[IFLA_VTI_OKEY]) { | |
256 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_OKEY]), s2, sizeof(s2)); | |
063dd06c | 257 | print_string(PRINT_ANY, "okey", "okey %s ", s2); |
2f7fbec2 | 258 | } |
ad4b1425 | 259 | |
063dd06c JF |
260 | if (tb[IFLA_VTI_FWMARK]) { |
261 | __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]); | |
262 | ||
263 | if (fwmark) { | |
264 | snprintf(s2, sizeof(s2), "0x%x", fwmark); | |
265 | ||
266 | print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2); | |
267 | } | |
ad4b1425 | 268 | } |
2f7fbec2 SK |
269 | } |
270 | ||
271 | struct link_util vti6_link_util = { | |
272 | .id = "vti6", | |
273 | .maxattr = IFLA_VTI_MAX, | |
274 | .parse_opt = vti6_parse_opt, | |
275 | .print_opt = vti6_print_opt, | |
276 | }; |