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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
27static void vti6_print_help(struct link_util *lu, int argc, char **argv,
28 FILE *f)
29{
30 fprintf(f,
31 "Usage: ... %-4s [ remote ADDR ]\n"
32 " [ local ADDR ]\n"
33 " [ [i|o]key KEY ]\n"
34 " [ dev PHYS_DEV ]\n"
35 " [ fwmark MARK ]\n"
36 "\n"
37 "Where: ADDR := { IPV6_ADDRESS }\n"
38 " KEY := { DOTTED_QUAD | NUMBER }\n"
39 " MARK := { 0x0..0xffffffff }\n",
40 lu->id);
41}
42
43static int vti6_parse_opt(struct link_util *lu, int argc, char **argv,
44 struct nlmsghdr *n)
45{
46 struct ifinfomsg *ifi = NLMSG_DATA(n);
47 struct {
48 struct nlmsghdr n;
49 struct ifinfomsg i;
50 } req = {
51 .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
52 .n.nlmsg_flags = NLM_F_REQUEST,
53 .n.nlmsg_type = RTM_GETLINK,
54 .i.ifi_family = preferred_family,
55 .i.ifi_index = ifi->ifi_index,
56 };
57 struct nlmsghdr *answer;
58 struct rtattr *tb[IFLA_MAX + 1];
59 struct rtattr *linkinfo[IFLA_INFO_MAX+1];
60 struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
61 __be32 ikey = 0;
62 __be32 okey = 0;
63 inet_prefix saddr, daddr;
64 unsigned int link = 0;
65 __u32 fwmark = 0;
66 int len;
67
68 inet_prefix_reset(&saddr);
69 inet_prefix_reset(&daddr);
70
71 if (!(n->nlmsg_flags & NLM_F_CREATE)) {
72 const struct rtattr *rta;
73
74 if (rtnl_talk(&rth, &req.n, &answer) < 0) {
75get_failed:
76 fprintf(stderr,
77 "Failed to get existing tunnel info.\n");
78 return -1;
79 }
80
81 len = answer->nlmsg_len;
82 len -= NLMSG_LENGTH(sizeof(*ifi));
83 if (len < 0)
84 goto get_failed;
85
86 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
87
88 if (!tb[IFLA_LINKINFO])
89 goto get_failed;
90
91 parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
92
93 if (!linkinfo[IFLA_INFO_DATA])
94 goto get_failed;
95
96 parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX,
97 linkinfo[IFLA_INFO_DATA]);
98
99 rta = vtiinfo[IFLA_VTI_LOCAL];
100 if (rta && get_addr_rta(&saddr, rta, AF_INET6))
101 goto get_failed;
102
103 rta = vtiinfo[IFLA_VTI_REMOTE];
104 if (rta && get_addr_rta(&daddr, rta, AF_INET6))
105 goto get_failed;
106
107 if (vtiinfo[IFLA_VTI_IKEY])
108 ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);
109
110 if (vtiinfo[IFLA_VTI_OKEY])
111 okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);
112
113 if (vtiinfo[IFLA_VTI_LINK])
114 link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]);
115
116 if (vtiinfo[IFLA_VTI_FWMARK])
117 fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]);
118
119 free(answer);
120 }
121
122 while (argc > 0) {
123 if (!matches(*argv, "key")) {
124 NEXT_ARG();
125 ikey = okey = tnl_parse_key("key", *argv);
126 } else if (!matches(*argv, "ikey")) {
127 NEXT_ARG();
128 ikey = tnl_parse_key("ikey", *argv);
129 } else if (!matches(*argv, "okey")) {
130 NEXT_ARG();
131 okey = tnl_parse_key("okey", *argv);
132 } else if (!matches(*argv, "remote")) {
133 NEXT_ARG();
134 get_addr(&daddr, *argv, AF_INET6);
135 } else if (!matches(*argv, "local")) {
136 NEXT_ARG();
137 get_addr(&saddr, *argv, AF_INET6);
138 } else if (!matches(*argv, "dev")) {
139 NEXT_ARG();
140 link = ll_name_to_index(*argv);
141 if (!link)
142 exit(nodev(*argv));
143 } else if (strcmp(*argv, "fwmark") == 0) {
144 NEXT_ARG();
145 if (get_u32(&fwmark, *argv, 0))
146 invarg("invalid fwmark\n", *argv);
147 } else {
148 vti6_print_help(lu, argc, argv, stderr);
149 return -1;
150 }
151 argc--; argv++;
152 }
153
154 addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
155 addattr32(n, 1024, IFLA_VTI_OKEY, okey);
156 if (is_addrtype_inet_not_unspec(&saddr))
157 addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen);
158 if (is_addrtype_inet_not_unspec(&daddr))
159 addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen);
160 addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
161 if (link)
162 addattr32(n, 1024, IFLA_VTI_LINK, link);
163
164 return 0;
165}
166
167static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
168{
169 char s2[64];
170
171 if (!tb)
172 return;
173
174 tnl_print_endpoint("remote", tb[IFLA_VTI_REMOTE], AF_INET6);
175 tnl_print_endpoint("local", tb[IFLA_VTI_LOCAL], AF_INET6);
176
177 if (tb[IFLA_VTI_LINK]) {
178 __u32 link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
179
180 if (link) {
181 print_string(PRINT_ANY, "link", "dev %s ",
182 ll_index_to_name(link));
183 }
184 }
185
186 if (tb[IFLA_VTI_IKEY]) {
187 struct rtattr *rta = tb[IFLA_VTI_IKEY];
188 __u32 key = rta_getattr_u32(rta);
189
190 if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
191 print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
192 }
193
194 if (tb[IFLA_VTI_OKEY]) {
195 struct rtattr *rta = tb[IFLA_VTI_OKEY];
196 __u32 key = rta_getattr_u32(rta);
197
198 if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
199 print_string(PRINT_ANY, "okey", "okey %s ", s2);
200 }
201
202 if (tb[IFLA_VTI_FWMARK]) {
203 __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);
204
205 if (fwmark) {
206 print_0xhex(PRINT_ANY,
207 "fwmark", "fwmark %#llx ", fwmark);
208 }
209 }
210}
211
212struct link_util vti6_link_util = {
213 .id = "vti6",
214 .maxattr = IFLA_VTI_MAX,
215 .parse_opt = vti6_parse_opt,
216 .print_opt = vti6_print_opt,
217 .print_help = vti6_print_help,
218};
219
