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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 | ||
26 | ||
561e650e | 27 | static void print_usage(FILE *f) |
28 | { | |
8b471354 PS |
29 | fprintf(f, |
30 | "Usage: ... vti [ remote ADDR ]\n" | |
31 | " [ local ADDR ]\n" | |
32 | " [ [i|o]key KEY ]\n" | |
33 | " [ dev PHYS_DEV ]\n" | |
ad4b1425 | 34 | " [ fwmark MARK ]\n" |
8b471354 PS |
35 | "\n" |
36 | "Where: ADDR := { IP_ADDRESS }\n" | |
37 | " KEY := { DOTTED_QUAD | NUMBER }\n" | |
ad4b1425 | 38 | " MARK := { 0x0..0xffffffff }\n" |
8b471354 | 39 | ); |
561e650e | 40 | } |
41 | ||
73579339 S |
42 | static void usage(void) __attribute__((noreturn)); |
43 | static void usage(void) | |
44 | { | |
561e650e | 45 | print_usage(stderr); |
73579339 S |
46 | exit(-1); |
47 | } | |
48 | ||
49 | static int vti_parse_opt(struct link_util *lu, int argc, char **argv, | |
50 | struct nlmsghdr *n) | |
51 | { | |
d17b136f | 52 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); |
73579339 S |
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; |
73579339 S |
64 | struct rtattr *tb[IFLA_MAX + 1]; |
65 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
66 | struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; | |
1f44b937 SP |
67 | __be32 ikey = 0; |
68 | __be32 okey = 0; | |
56f5daac SH |
69 | unsigned int saddr = 0; |
70 | unsigned int daddr = 0; | |
71 | unsigned int link = 0; | |
ad4b1425 | 72 | unsigned int fwmark = 0; |
73579339 S |
73 | int len; |
74 | ||
75 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
86bf43c7 | 76 | if (rtnl_talk(&rth, &req.n, &answer) < 0) { |
73579339 S |
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; |
73579339 S |
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); |
73579339 S |
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]) | |
9f1370c0 | 102 | ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); |
73579339 S |
103 | |
104 | if (vtiinfo[IFLA_VTI_OKEY]) | |
9f1370c0 | 105 | okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); |
73579339 S |
106 | |
107 | if (vtiinfo[IFLA_VTI_LOCAL]) | |
9f1370c0 | 108 | saddr = rta_getattr_u32(vtiinfo[IFLA_VTI_LOCAL]); |
73579339 S |
109 | |
110 | if (vtiinfo[IFLA_VTI_REMOTE]) | |
9f1370c0 | 111 | daddr = rta_getattr_u32(vtiinfo[IFLA_VTI_REMOTE]); |
73579339 S |
112 | |
113 | if (vtiinfo[IFLA_VTI_LINK]) | |
9f1370c0 | 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); | |
73579339 S |
120 | } |
121 | ||
122 | while (argc > 0) { | |
123 | if (!matches(*argv, "key")) { | |
73579339 | 124 | NEXT_ARG(); |
1f44b937 | 125 | ikey = okey = tnl_parse_key("key", *argv); |
73579339 | 126 | } else if (!matches(*argv, "ikey")) { |
73579339 | 127 | NEXT_ARG(); |
1f44b937 | 128 | ikey = tnl_parse_key("ikey", *argv); |
73579339 | 129 | } else if (!matches(*argv, "okey")) { |
73579339 | 130 | NEXT_ARG(); |
1f44b937 | 131 | okey = tnl_parse_key("okey", *argv); |
73579339 S |
132 | } else if (!matches(*argv, "remote")) { |
133 | NEXT_ARG(); | |
57daab1e | 134 | daddr = get_addr32(*argv); |
73579339 S |
135 | } else if (!matches(*argv, "local")) { |
136 | NEXT_ARG(); | |
57daab1e | 137 | saddr = get_addr32(*argv); |
73579339 S |
138 | } else if (!matches(*argv, "dev")) { |
139 | NEXT_ARG(); | |
140 | link = if_nametoindex(*argv); | |
0cb6bb51 CW |
141 | if (link == 0) { |
142 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
143 | *argv); | |
73579339 | 144 | exit(-1); |
0cb6bb51 | 145 | } |
ad4b1425 CG |
146 | } else if (strcmp(*argv, "fwmark") == 0) { |
147 | NEXT_ARG(); | |
148 | if (get_u32(&fwmark, *argv, 0)) | |
149 | invarg("invalid fwmark\n", *argv); | |
73579339 S |
150 | } else |
151 | usage(); | |
152 | argc--; argv++; | |
153 | } | |
154 | ||
155 | addattr32(n, 1024, IFLA_VTI_IKEY, ikey); | |
156 | addattr32(n, 1024, IFLA_VTI_OKEY, okey); | |
157 | addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, 4); | |
158 | addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, 4); | |
ad4b1425 | 159 | addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark); |
73579339 S |
160 | if (link) |
161 | addattr32(n, 1024, IFLA_VTI_LINK, link); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
167 | { | |
73579339 S |
168 | const char *local = "any"; |
169 | const char *remote = "any"; | |
fcfcc40b | 170 | __u32 key; |
9f1370c0 | 171 | unsigned int link; |
fcfcc40b | 172 | char s2[IFNAMSIZ]; |
73579339 S |
173 | |
174 | if (!tb) | |
175 | return; | |
176 | ||
177 | if (tb[IFLA_VTI_REMOTE]) { | |
9f1370c0 | 178 | unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_REMOTE]); |
73579339 S |
179 | |
180 | if (addr) | |
a418e451 | 181 | remote = format_host(AF_INET, 4, &addr); |
73579339 S |
182 | } |
183 | ||
4c42a1c1 | 184 | print_string(PRINT_ANY, "remote", "remote %s ", remote); |
73579339 S |
185 | |
186 | if (tb[IFLA_VTI_LOCAL]) { | |
9f1370c0 | 187 | unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_LOCAL]); |
73579339 S |
188 | |
189 | if (addr) | |
a418e451 | 190 | local = format_host(AF_INET, 4, &addr); |
73579339 S |
191 | } |
192 | ||
4c42a1c1 | 193 | print_string(PRINT_ANY, "local", "local %s ", local); |
73579339 | 194 | |
9f1370c0 SH |
195 | if (tb[IFLA_VTI_LINK] && |
196 | (link = rta_getattr_u32(tb[IFLA_VTI_LINK]))) { | |
73579339 S |
197 | const char *n = if_indextoname(link, s2); |
198 | ||
199 | if (n) | |
4c42a1c1 | 200 | print_string(PRINT_ANY, "link", "dev %s ", n); |
73579339 | 201 | else |
4c42a1c1 | 202 | print_uint(PRINT_ANY, "link_index", "dev %u ", link); |
73579339 S |
203 | } |
204 | ||
fcfcc40b SH |
205 | if (tb[IFLA_VTI_IKEY] && |
206 | (key = rta_getattr_u32(tb[IFLA_VTI_IKEY]))) | |
4c42a1c1 | 207 | print_0xhex(PRINT_ANY, "ikey", "ikey %#x ", ntohl(key)); |
73579339 | 208 | |
fcfcc40b SH |
209 | |
210 | if (tb[IFLA_VTI_OKEY] && | |
211 | (key = rta_getattr_u32(tb[IFLA_VTI_OKEY]))) | |
4c42a1c1 | 212 | print_0xhex(PRINT_ANY, "okey", "okey %#x ", ntohl(key)); |
ad4b1425 | 213 | |
4c42a1c1 JF |
214 | if (tb[IFLA_VTI_FWMARK]) { |
215 | __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]); | |
216 | ||
217 | if (fwmark) { | |
218 | SPRINT_BUF(b1); | |
219 | ||
220 | snprintf(b1, sizeof(b1), "0x%x", fwmark); | |
221 | print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2); | |
222 | } | |
ad4b1425 | 223 | } |
73579339 S |
224 | } |
225 | ||
561e650e | 226 | static void vti_print_help(struct link_util *lu, int argc, char **argv, |
227 | FILE *f) | |
228 | { | |
229 | print_usage(f); | |
230 | } | |
231 | ||
73579339 S |
232 | struct link_util vti_link_util = { |
233 | .id = "vti", | |
234 | .maxattr = IFLA_VTI_MAX, | |
235 | .parse_opt = vti_parse_opt, | |
236 | .print_opt = vti_print_opt, | |
561e650e | 237 | .print_help = vti_print_help, |
73579339 | 238 | }; |