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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 | ||
b8dc6c5b SP |
27 | static void print_usage(FILE *f) |
28 | { | |
29 | fprintf(f, | |
30 | "Usage: ... vti6 [ remote ADDR ]\n" | |
31 | " [ local ADDR ]\n" | |
32 | " [ [i|o]key KEY ]\n" | |
33 | " [ dev PHYS_DEV ]\n" | |
34 | " [ fwmark MARK ]\n" | |
35 | "\n" | |
36 | "Where: ADDR := { IPV6_ADDRESS }\n" | |
37 | " KEY := { DOTTED_QUAD | NUMBER }\n" | |
38 | " MARK := { 0x0..0xffffffff }\n" | |
39 | ); | |
40 | } | |
2f7fbec2 SK |
41 | |
42 | static void usage(void) __attribute__((noreturn)); | |
43 | static void usage(void) | |
44 | { | |
b8dc6c5b | 45 | print_usage(stderr); |
2f7fbec2 SK |
46 | exit(-1); |
47 | } | |
48 | ||
49 | static int vti6_parse_opt(struct link_util *lu, int argc, char **argv, | |
50 | struct nlmsghdr *n) | |
51 | { | |
d17b136f | 52 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); |
2f7fbec2 SK |
53 | struct { |
54 | struct nlmsghdr n; | |
55 | struct ifinfomsg i; | |
d17b136f PS |
56 | } req = { |
57 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)), | |
58 | .n.nlmsg_flags = NLM_F_REQUEST, | |
59 | .n.nlmsg_type = RTM_GETLINK, | |
60 | .i.ifi_family = preferred_family, | |
61 | .i.ifi_index = ifi->ifi_index, | |
62 | }; | |
08ede25f | 63 | struct nlmsghdr *answer; |
2f7fbec2 SK |
64 | struct rtattr *tb[IFLA_MAX + 1]; |
65 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
66 | struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; | |
2a80154f SH |
67 | struct in6_addr saddr = IN6ADDR_ANY_INIT; |
68 | struct in6_addr daddr = IN6ADDR_ANY_INIT; | |
1f44b937 SP |
69 | __be32 ikey = 0; |
70 | __be32 okey = 0; | |
56f5daac | 71 | unsigned int link = 0; |
ad4b1425 | 72 | __u32 fwmark = 0; |
2f7fbec2 SK |
73 | int len; |
74 | ||
75 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
86bf43c7 | 76 | if (rtnl_talk(&rth, &req.n, &answer) < 0) { |
2f7fbec2 SK |
77 | get_failed: |
78 | fprintf(stderr, | |
79 | "Failed to get existing tunnel info.\n"); | |
80 | return -1; | |
81 | } | |
82 | ||
86bf43c7 | 83 | len = answer->nlmsg_len; |
2f7fbec2 SK |
84 | len -= NLMSG_LENGTH(sizeof(*ifi)); |
85 | if (len < 0) | |
86 | goto get_failed; | |
87 | ||
86bf43c7 | 88 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len); |
2f7fbec2 SK |
89 | |
90 | if (!tb[IFLA_LINKINFO]) | |
91 | goto get_failed; | |
92 | ||
93 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
94 | ||
95 | if (!linkinfo[IFLA_INFO_DATA]) | |
96 | goto get_failed; | |
97 | ||
98 | parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, | |
99 | linkinfo[IFLA_INFO_DATA]); | |
100 | ||
101 | if (vtiinfo[IFLA_VTI_IKEY]) | |
102 | ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); | |
103 | ||
104 | if (vtiinfo[IFLA_VTI_OKEY]) | |
105 | okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); | |
106 | ||
107 | if (vtiinfo[IFLA_VTI_LOCAL]) | |
108 | memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr)); | |
109 | ||
110 | if (vtiinfo[IFLA_VTI_REMOTE]) | |
111 | memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr)); | |
112 | ||
113 | if (vtiinfo[IFLA_VTI_LINK]) | |
114 | link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]); | |
ad4b1425 CG |
115 | |
116 | if (vtiinfo[IFLA_VTI_FWMARK]) | |
117 | fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]); | |
86bf43c7 HL |
118 | |
119 | free(answer); | |
2f7fbec2 SK |
120 | } |
121 | ||
122 | while (argc > 0) { | |
123 | if (!matches(*argv, "key")) { | |
2f7fbec2 | 124 | NEXT_ARG(); |
1f44b937 | 125 | ikey = okey = tnl_parse_key("key", *argv); |
2f7fbec2 | 126 | } else if (!matches(*argv, "ikey")) { |
2f7fbec2 | 127 | NEXT_ARG(); |
1f44b937 | 128 | ikey = tnl_parse_key("ikey", *argv); |
2f7fbec2 | 129 | } else if (!matches(*argv, "okey")) { |
2f7fbec2 | 130 | NEXT_ARG(); |
1f44b937 | 131 | okey = tnl_parse_key("okey", *argv); |
2f7fbec2 | 132 | } else if (!matches(*argv, "remote")) { |
57daab1e | 133 | inet_prefix addr; |
56f5daac | 134 | |
2f7fbec2 | 135 | NEXT_ARG(); |
9aceaad7 SP |
136 | get_addr(&addr, *argv, AF_INET6); |
137 | memcpy(&daddr, addr.data, sizeof(daddr)); | |
57daab1e SP |
138 | } else if (!matches(*argv, "local")) { |
139 | inet_prefix addr; | |
56f5daac | 140 | |
57daab1e | 141 | NEXT_ARG(); |
9aceaad7 SP |
142 | get_addr(&addr, *argv, AF_INET6); |
143 | memcpy(&saddr, addr.data, sizeof(saddr)); | |
2f7fbec2 SK |
144 | } else if (!matches(*argv, "dev")) { |
145 | NEXT_ARG(); | |
7a14358b | 146 | link = ll_name_to_index(*argv); |
9dc04a4f SP |
147 | if (link == 0) { |
148 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
149 | *argv); | |
2f7fbec2 | 150 | exit(-1); |
9dc04a4f | 151 | } |
ad4b1425 CG |
152 | } else if (strcmp(*argv, "fwmark") == 0) { |
153 | NEXT_ARG(); | |
154 | if (get_u32(&fwmark, *argv, 0)) | |
155 | invarg("invalid fwmark\n", *argv); | |
2f7fbec2 SK |
156 | } else |
157 | usage(); | |
158 | argc--; argv++; | |
159 | } | |
160 | ||
161 | addattr32(n, 1024, IFLA_VTI_IKEY, ikey); | |
162 | addattr32(n, 1024, IFLA_VTI_OKEY, okey); | |
560cf612 SP |
163 | addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr)); |
164 | addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr)); | |
ad4b1425 | 165 | addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark); |
2f7fbec2 SK |
166 | if (link) |
167 | addattr32(n, 1024, IFLA_VTI_LINK, link); | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
173 | { | |
9f1370c0 | 174 | char s2[64]; |
2f7fbec2 SK |
175 | |
176 | if (!tb) | |
177 | return; | |
178 | ||
b761fc41 SP |
179 | tnl_print_endpoint("remote", tb[IFLA_VTI_REMOTE], AF_INET6); |
180 | tnl_print_endpoint("local", tb[IFLA_VTI_LOCAL], AF_INET6); | |
2f7fbec2 | 181 | |
45d3a6ef SP |
182 | if (tb[IFLA_VTI_LINK]) { |
183 | unsigned int link = rta_getattr_u32(tb[IFLA_VTI_LINK]); | |
2f7fbec2 | 184 | |
45d3a6ef SP |
185 | if (link) { |
186 | print_string(PRINT_ANY, "link", "dev %s ", | |
187 | ll_index_to_name(link)); | |
188 | } | |
2f7fbec2 SK |
189 | } |
190 | ||
191 | if (tb[IFLA_VTI_IKEY]) { | |
34a8c54d SP |
192 | struct rtattr *rta = tb[IFLA_VTI_IKEY]; |
193 | __u32 key = rta_getattr_u32(rta); | |
194 | ||
195 | if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) | |
196 | print_string(PRINT_ANY, "ikey", "ikey %s ", s2); | |
2f7fbec2 SK |
197 | } |
198 | ||
199 | if (tb[IFLA_VTI_OKEY]) { | |
34a8c54d SP |
200 | struct rtattr *rta = tb[IFLA_VTI_OKEY]; |
201 | __u32 key = rta_getattr_u32(rta); | |
202 | ||
203 | if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) | |
204 | print_string(PRINT_ANY, "okey", "okey %s ", s2); | |
2f7fbec2 | 205 | } |
ad4b1425 | 206 | |
063dd06c JF |
207 | if (tb[IFLA_VTI_FWMARK]) { |
208 | __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]); | |
209 | ||
210 | if (fwmark) { | |
e97ad3d2 SP |
211 | print_0xhex(PRINT_ANY, |
212 | "fwmark", "fwmark 0x%x ", fwmark); | |
063dd06c | 213 | } |
ad4b1425 | 214 | } |
2f7fbec2 SK |
215 | } |
216 | ||
b8dc6c5b SP |
217 | static void vti6_print_help(struct link_util *lu, int argc, char **argv, |
218 | FILE *f) | |
219 | { | |
220 | print_usage(f); | |
221 | } | |
222 | ||
2f7fbec2 SK |
223 | struct link_util vti6_link_util = { |
224 | .id = "vti6", | |
225 | .maxattr = IFLA_VTI_MAX, | |
226 | .parse_opt = vti6_parse_opt, | |
227 | .print_opt = vti6_print_opt, | |
b8dc6c5b | 228 | .print_help = vti6_print_help, |
2f7fbec2 | 229 | }; |