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73579339 S |
1 | /* |
2 | * link_vti.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 | */ | |
12 | ||
13 | #include <string.h> | |
14 | #include <net/if.h> | |
15 | #include <sys/types.h> | |
16 | #include <sys/socket.h> | |
17 | #include <arpa/inet.h> | |
18 | ||
19 | #include <linux/ip.h> | |
20 | #include <linux/if_tunnel.h> | |
21 | #include "rt_names.h" | |
22 | #include "utils.h" | |
23 | #include "ip_common.h" | |
24 | #include "tunnel.h" | |
25 | ||
4aa552ea | 26 | static void vti_print_help(struct link_util *lu, int argc, char **argv, FILE *f) |
561e650e | 27 | { |
8b471354 | 28 | fprintf(f, |
4aa552ea SP |
29 | "Usage: ... %-4s [ remote ADDR ]\n", |
30 | lu->id | |
31 | ); | |
32 | fprintf(f, | |
33 | " [ local ADDR ]\n" | |
34 | " [ [i|o]key KEY ]\n" | |
35 | " [ dev PHYS_DEV ]\n" | |
36 | " [ fwmark MARK ]\n" | |
8b471354 | 37 | "\n" |
4aa552ea SP |
38 | ); |
39 | fprintf(f, | |
40 | "Where: ADDR := { IP%s_ADDRESS }\n" | |
8b471354 | 41 | " KEY := { DOTTED_QUAD | NUMBER }\n" |
4aa552ea SP |
42 | " MARK := { 0x0..0xffffffff }\n", |
43 | "" | |
8b471354 | 44 | ); |
561e650e | 45 | } |
46 | ||
73579339 S |
47 | static int vti_parse_opt(struct link_util *lu, int argc, char **argv, |
48 | struct nlmsghdr *n) | |
49 | { | |
28254695 | 50 | struct ifinfomsg *ifi = NLMSG_DATA(n); |
73579339 S |
51 | struct { |
52 | struct nlmsghdr n; | |
53 | struct ifinfomsg i; | |
d17b136f PS |
54 | } req = { |
55 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)), | |
56 | .n.nlmsg_flags = NLM_F_REQUEST, | |
57 | .n.nlmsg_type = RTM_GETLINK, | |
58 | .i.ifi_family = preferred_family, | |
59 | .i.ifi_index = ifi->ifi_index, | |
60 | }; | |
08ede25f | 61 | struct nlmsghdr *answer; |
73579339 S |
62 | struct rtattr *tb[IFLA_MAX + 1]; |
63 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
64 | struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; | |
1f44b937 SP |
65 | __be32 ikey = 0; |
66 | __be32 okey = 0; | |
3d4e0db6 | 67 | inet_prefix saddr, daddr; |
56f5daac | 68 | unsigned int link = 0; |
9dc04a4f | 69 | __u32 fwmark = 0; |
73579339 S |
70 | int len; |
71 | ||
3d4e0db6 SP |
72 | inet_prefix_reset(&saddr); |
73 | inet_prefix_reset(&daddr); | |
74 | ||
73579339 | 75 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { |
3d4e0db6 SP |
76 | const struct rtattr *rta; |
77 | ||
86bf43c7 | 78 | if (rtnl_talk(&rth, &req.n, &answer) < 0) { |
73579339 S |
79 | get_failed: |
80 | fprintf(stderr, | |
81 | "Failed to get existing tunnel info.\n"); | |
82 | return -1; | |
83 | } | |
84 | ||
86bf43c7 | 85 | len = answer->nlmsg_len; |
73579339 S |
86 | len -= NLMSG_LENGTH(sizeof(*ifi)); |
87 | if (len < 0) | |
88 | goto get_failed; | |
89 | ||
86bf43c7 | 90 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len); |
73579339 S |
91 | |
92 | if (!tb[IFLA_LINKINFO]) | |
93 | goto get_failed; | |
94 | ||
95 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
96 | ||
97 | if (!linkinfo[IFLA_INFO_DATA]) | |
98 | goto get_failed; | |
99 | ||
100 | parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, | |
101 | linkinfo[IFLA_INFO_DATA]); | |
102 | ||
3d4e0db6 SP |
103 | rta = vtiinfo[IFLA_VTI_LOCAL]; |
104 | if (rta && get_addr_rta(&saddr, rta, AF_INET)) | |
105 | goto get_failed; | |
106 | ||
107 | rta = vtiinfo[IFLA_VTI_REMOTE]; | |
108 | if (rta && get_addr_rta(&daddr, rta, AF_INET)) | |
109 | goto get_failed; | |
110 | ||
73579339 | 111 | if (vtiinfo[IFLA_VTI_IKEY]) |
9f1370c0 | 112 | ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); |
73579339 S |
113 | |
114 | if (vtiinfo[IFLA_VTI_OKEY]) | |
9f1370c0 | 115 | okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); |
73579339 | 116 | |
73579339 | 117 | if (vtiinfo[IFLA_VTI_LINK]) |
9f1370c0 | 118 | link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]); |
ad4b1425 CG |
119 | |
120 | if (vtiinfo[IFLA_VTI_FWMARK]) | |
121 | fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]); | |
86bf43c7 HL |
122 | |
123 | free(answer); | |
73579339 S |
124 | } |
125 | ||
126 | while (argc > 0) { | |
127 | if (!matches(*argv, "key")) { | |
73579339 | 128 | NEXT_ARG(); |
1f44b937 | 129 | ikey = okey = tnl_parse_key("key", *argv); |
73579339 | 130 | } else if (!matches(*argv, "ikey")) { |
73579339 | 131 | NEXT_ARG(); |
1f44b937 | 132 | ikey = tnl_parse_key("ikey", *argv); |
73579339 | 133 | } else if (!matches(*argv, "okey")) { |
73579339 | 134 | NEXT_ARG(); |
1f44b937 | 135 | okey = tnl_parse_key("okey", *argv); |
73579339 S |
136 | } else if (!matches(*argv, "remote")) { |
137 | NEXT_ARG(); | |
3d4e0db6 | 138 | get_addr(&daddr, *argv, AF_INET); |
73579339 S |
139 | } else if (!matches(*argv, "local")) { |
140 | NEXT_ARG(); | |
3d4e0db6 | 141 | get_addr(&saddr, *argv, AF_INET); |
73579339 S |
142 | } else if (!matches(*argv, "dev")) { |
143 | NEXT_ARG(); | |
7a14358b | 144 | link = ll_name_to_index(*argv); |
fe99adbc SP |
145 | if (!link) |
146 | exit(nodev(*argv)); | |
ad4b1425 CG |
147 | } else if (strcmp(*argv, "fwmark") == 0) { |
148 | NEXT_ARG(); | |
149 | if (get_u32(&fwmark, *argv, 0)) | |
150 | invarg("invalid fwmark\n", *argv); | |
4aa552ea SP |
151 | } else { |
152 | vti_print_help(lu, argc, argv, stderr); | |
153 | return -1; | |
154 | } | |
73579339 S |
155 | argc--; argv++; |
156 | } | |
157 | ||
158 | addattr32(n, 1024, IFLA_VTI_IKEY, ikey); | |
159 | addattr32(n, 1024, IFLA_VTI_OKEY, okey); | |
fa1e658e | 160 | if (is_addrtype_inet_not_unspec(&saddr)) |
3d4e0db6 | 161 | addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen); |
fa1e658e | 162 | if (is_addrtype_inet_not_unspec(&daddr)) |
3d4e0db6 | 163 | addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen); |
ad4b1425 | 164 | addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark); |
73579339 S |
165 | if (link) |
166 | addattr32(n, 1024, IFLA_VTI_LINK, link); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
172 | { | |
34a8c54d | 173 | char s2[64]; |
73579339 S |
174 | |
175 | if (!tb) | |
176 | return; | |
177 | ||
b761fc41 SP |
178 | tnl_print_endpoint("remote", tb[IFLA_VTI_REMOTE], AF_INET); |
179 | tnl_print_endpoint("local", tb[IFLA_VTI_LOCAL], AF_INET); | |
73579339 | 180 | |
45d3a6ef | 181 | if (tb[IFLA_VTI_LINK]) { |
5bd93795 | 182 | __u32 link = rta_getattr_u32(tb[IFLA_VTI_LINK]); |
73579339 | 183 | |
45d3a6ef SP |
184 | if (link) { |
185 | print_string(PRINT_ANY, "link", "dev %s ", | |
186 | ll_index_to_name(link)); | |
187 | } | |
73579339 S |
188 | } |
189 | ||
34a8c54d SP |
190 | if (tb[IFLA_VTI_IKEY]) { |
191 | struct rtattr *rta = tb[IFLA_VTI_IKEY]; | |
192 | __u32 key = rta_getattr_u32(rta); | |
73579339 | 193 | |
34a8c54d SP |
194 | if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) |
195 | print_string(PRINT_ANY, "ikey", "ikey %s ", s2); | |
196 | } | |
197 | ||
198 | if (tb[IFLA_VTI_OKEY]) { | |
199 | struct rtattr *rta = tb[IFLA_VTI_OKEY]; | |
200 | __u32 key = rta_getattr_u32(rta); | |
fcfcc40b | 201 | |
34a8c54d SP |
202 | if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) |
203 | print_string(PRINT_ANY, "okey", "okey %s ", s2); | |
204 | } | |
ad4b1425 | 205 | |
4c42a1c1 JF |
206 | if (tb[IFLA_VTI_FWMARK]) { |
207 | __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]); | |
208 | ||
209 | if (fwmark) { | |
e97ad3d2 | 210 | print_0xhex(PRINT_ANY, |
90c5c969 | 211 | "fwmark", "fwmark %#llx ", fwmark); |
4c42a1c1 | 212 | } |
ad4b1425 | 213 | } |
73579339 S |
214 | } |
215 | ||
216 | struct link_util vti_link_util = { | |
217 | .id = "vti", | |
218 | .maxattr = IFLA_VTI_MAX, | |
219 | .parse_opt = vti_parse_opt, | |
220 | .print_opt = vti_print_opt, | |
561e650e | 221 | .print_help = vti_print_help, |
73579339 | 222 | }; |