Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 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"); |
| 35 | fprintf(stderr, "\n"); |
| 36 | fprintf(stderr, "Where: NAME := STRING\n"); |
| 37 | fprintf(stderr, " ADDR := { IPV6_ADDRESS }\n"); |
| 38 | fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); |
| 39 | exit(-1); |
| 40 | } |
| 41 | |
| 42 | static int vti6_parse_opt(struct link_util *lu, int argc, char **argv, |
| 43 | struct nlmsghdr *n) |
| 44 | { |
Phil Sutter | d17b136 | 2016-07-18 16:48:42 +0200 | [diff] [blame] | 45 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 46 | struct { |
| 47 | struct nlmsghdr n; |
| 48 | struct ifinfomsg i; |
| 49 | char buf[1024]; |
Phil Sutter | d17b136 | 2016-07-18 16:48:42 +0200 | [diff] [blame] | 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 | }; |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 57 | struct rtattr *tb[IFLA_MAX + 1]; |
| 58 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; |
| 59 | struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; |
| 60 | struct in6_addr saddr; |
| 61 | struct in6_addr daddr; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 62 | unsigned int ikey = 0; |
| 63 | unsigned int okey = 0; |
| 64 | unsigned int link = 0; |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 65 | int len; |
| 66 | |
| 67 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 68 | if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) { |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 69 | get_failed: |
| 70 | fprintf(stderr, |
| 71 | "Failed to get existing tunnel info.\n"); |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | len = req.n.nlmsg_len; |
| 76 | len -= NLMSG_LENGTH(sizeof(*ifi)); |
| 77 | if (len < 0) |
| 78 | goto get_failed; |
| 79 | |
| 80 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len); |
| 81 | |
| 82 | if (!tb[IFLA_LINKINFO]) |
| 83 | goto get_failed; |
| 84 | |
| 85 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); |
| 86 | |
| 87 | if (!linkinfo[IFLA_INFO_DATA]) |
| 88 | goto get_failed; |
| 89 | |
| 90 | parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, |
| 91 | linkinfo[IFLA_INFO_DATA]); |
| 92 | |
| 93 | if (vtiinfo[IFLA_VTI_IKEY]) |
| 94 | ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); |
| 95 | |
| 96 | if (vtiinfo[IFLA_VTI_OKEY]) |
| 97 | okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); |
| 98 | |
| 99 | if (vtiinfo[IFLA_VTI_LOCAL]) |
| 100 | memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr)); |
| 101 | |
| 102 | if (vtiinfo[IFLA_VTI_REMOTE]) |
| 103 | memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr)); |
| 104 | |
| 105 | if (vtiinfo[IFLA_VTI_LINK]) |
| 106 | link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]); |
| 107 | } |
| 108 | |
| 109 | while (argc > 0) { |
| 110 | if (!matches(*argv, "key")) { |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 111 | unsigned int uval; |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 112 | |
| 113 | NEXT_ARG(); |
| 114 | if (strchr(*argv, '.')) |
| 115 | uval = get_addr32(*argv); |
| 116 | else { |
| 117 | if (get_unsigned(&uval, *argv, 0) < 0) { |
| 118 | fprintf(stderr, |
| 119 | "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv); |
| 120 | exit(-1); |
| 121 | } |
| 122 | uval = htonl(uval); |
| 123 | } |
| 124 | |
| 125 | ikey = okey = uval; |
| 126 | } else if (!matches(*argv, "ikey")) { |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 127 | unsigned int uval; |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 128 | |
| 129 | NEXT_ARG(); |
| 130 | if (strchr(*argv, '.')) |
| 131 | uval = get_addr32(*argv); |
| 132 | else { |
| 133 | if (get_unsigned(&uval, *argv, 0) < 0) { |
| 134 | fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv); |
| 135 | exit(-1); |
| 136 | } |
| 137 | uval = htonl(uval); |
| 138 | } |
| 139 | ikey = uval; |
| 140 | } else if (!matches(*argv, "okey")) { |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 141 | unsigned int uval; |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 142 | |
| 143 | NEXT_ARG(); |
| 144 | if (strchr(*argv, '.')) |
| 145 | uval = get_addr32(*argv); |
| 146 | else { |
| 147 | if (get_unsigned(&uval, *argv, 0) < 0) { |
| 148 | fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv); |
| 149 | exit(-1); |
| 150 | } |
| 151 | uval = htonl(uval); |
| 152 | } |
| 153 | okey = uval; |
| 154 | } else if (!matches(*argv, "remote")) { |
| 155 | NEXT_ARG(); |
| 156 | if (!strcmp(*argv, "any")) { |
| 157 | fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv); |
| 158 | exit(-1); |
| 159 | } else { |
| 160 | inet_prefix addr; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 161 | |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 162 | get_prefix(&addr, *argv, AF_INET6); |
| 163 | memcpy(&daddr, addr.data, addr.bytelen); |
| 164 | } |
| 165 | } else if (!matches(*argv, "local")) { |
| 166 | NEXT_ARG(); |
| 167 | if (!strcmp(*argv, "any")) { |
| 168 | fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv); |
| 169 | exit(-1); |
| 170 | } else { |
| 171 | inet_prefix addr; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 172 | |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 173 | get_prefix(&addr, *argv, AF_INET6); |
| 174 | memcpy(&saddr, addr.data, addr.bytelen); |
| 175 | } |
| 176 | } else if (!matches(*argv, "dev")) { |
| 177 | NEXT_ARG(); |
| 178 | link = if_nametoindex(*argv); |
| 179 | if (link == 0) |
| 180 | exit(-1); |
| 181 | } else |
| 182 | usage(); |
| 183 | argc--; argv++; |
| 184 | } |
| 185 | |
| 186 | addattr32(n, 1024, IFLA_VTI_IKEY, ikey); |
| 187 | addattr32(n, 1024, IFLA_VTI_OKEY, okey); |
| 188 | addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr)); |
| 189 | addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr)); |
| 190 | if (link) |
| 191 | addattr32(n, 1024, IFLA_VTI_LINK, link); |
| 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) |
| 197 | { |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 198 | char s2[64]; |
| 199 | const char *local = "any"; |
| 200 | const char *remote = "any"; |
| 201 | struct in6_addr saddr; |
| 202 | struct in6_addr daddr; |
| 203 | |
| 204 | if (!tb) |
| 205 | return; |
| 206 | |
| 207 | if (tb[IFLA_VTI_REMOTE]) { |
| 208 | memcpy(&daddr, RTA_DATA(tb[IFLA_VTI_REMOTE]), sizeof(daddr)); |
| 209 | |
Phil Sutter | a418e45 | 2016-03-22 19:35:15 +0100 | [diff] [blame] | 210 | remote = format_host(AF_INET6, 16, &daddr); |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | fprintf(f, "remote %s ", remote); |
| 214 | |
| 215 | if (tb[IFLA_VTI_LOCAL]) { |
| 216 | memcpy(&saddr, RTA_DATA(tb[IFLA_VTI_LOCAL]), sizeof(saddr)); |
| 217 | |
Phil Sutter | a418e45 | 2016-03-22 19:35:15 +0100 | [diff] [blame] | 218 | local = format_host(AF_INET6, 16, &saddr); |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | fprintf(f, "local %s ", local); |
| 222 | |
| 223 | if (tb[IFLA_VTI_LINK] && *(__u32 *)RTA_DATA(tb[IFLA_VTI_LINK])) { |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 224 | unsigned int link = *(__u32 *)RTA_DATA(tb[IFLA_VTI_LINK]); |
Steffen Klassert | 2f7fbec | 2014-09-26 09:11:37 +0200 | [diff] [blame] | 225 | const char *n = if_indextoname(link, s2); |
| 226 | |
| 227 | if (n) |
| 228 | fprintf(f, "dev %s ", n); |
| 229 | else |
| 230 | fprintf(f, "dev %u ", link); |
| 231 | } |
| 232 | |
| 233 | if (tb[IFLA_VTI_IKEY]) { |
| 234 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_IKEY]), s2, sizeof(s2)); |
| 235 | fprintf(f, "ikey %s ", s2); |
| 236 | } |
| 237 | |
| 238 | if (tb[IFLA_VTI_OKEY]) { |
| 239 | inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_OKEY]), s2, sizeof(s2)); |
| 240 | fprintf(f, "okey %s ", s2); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | struct link_util vti6_link_util = { |
| 245 | .id = "vti6", |
| 246 | .maxattr = IFLA_VTI_MAX, |
| 247 | .parse_opt = vti6_parse_opt, |
| 248 | .print_opt = vti6_print_opt, |
| 249 | }; |