Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 1 | /* |
| 2 | * iproute_lwtunnel.c |
| 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: Roopa Prabhu, <roopa@cumulusnetworks.com> |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 10 | * Thomas Graf <tgraf@suug.ch> |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <unistd.h> |
| 17 | #include <fcntl.h> |
| 18 | #include <string.h> |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 19 | #include <linux/ila.h> |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 20 | #include <linux/lwtunnel.h> |
| 21 | #include <linux/mpls_iptunnel.h> |
| 22 | #include <errno.h> |
| 23 | |
| 24 | #include "rt_names.h" |
| 25 | #include "utils.h" |
| 26 | #include "iproute_lwtunnel.h" |
| 27 | |
| 28 | static int read_encap_type(const char *name) |
| 29 | { |
| 30 | if (strcmp(name, "mpls") == 0) |
| 31 | return LWTUNNEL_ENCAP_MPLS; |
| 32 | else if (strcmp(name, "ip") == 0) |
| 33 | return LWTUNNEL_ENCAP_IP; |
| 34 | else if (strcmp(name, "ip6") == 0) |
| 35 | return LWTUNNEL_ENCAP_IP6; |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 36 | else if (strcmp(name, "ila") == 0) |
| 37 | return LWTUNNEL_ENCAP_ILA; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 38 | else |
| 39 | return LWTUNNEL_ENCAP_NONE; |
| 40 | } |
| 41 | |
| 42 | static const char *format_encap_type(int type) |
| 43 | { |
| 44 | switch (type) { |
| 45 | case LWTUNNEL_ENCAP_MPLS: |
| 46 | return "mpls"; |
| 47 | case LWTUNNEL_ENCAP_IP: |
| 48 | return "ip"; |
| 49 | case LWTUNNEL_ENCAP_IP6: |
| 50 | return "ip6"; |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 51 | case LWTUNNEL_ENCAP_ILA: |
| 52 | return "ila"; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 53 | default: |
| 54 | return "unknown"; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | static void print_encap_mpls(FILE *fp, struct rtattr *encap) |
| 59 | { |
| 60 | struct rtattr *tb[MPLS_IPTUNNEL_MAX+1]; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 61 | |
| 62 | parse_rtattr_nested(tb, MPLS_IPTUNNEL_MAX, encap); |
| 63 | |
| 64 | if (tb[MPLS_IPTUNNEL_DST]) |
Phil Sutter | d49f934 | 2016-03-22 19:35:17 +0100 | [diff] [blame] | 65 | fprintf(fp, " %s ", |
| 66 | format_host_rta(AF_MPLS, tb[MPLS_IPTUNNEL_DST])); |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | static void print_encap_ip(FILE *fp, struct rtattr *encap) |
| 70 | { |
| 71 | struct rtattr *tb[LWTUNNEL_IP_MAX+1]; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 72 | |
| 73 | parse_rtattr_nested(tb, LWTUNNEL_IP_MAX, encap); |
| 74 | |
| 75 | if (tb[LWTUNNEL_IP_ID]) |
| 76 | fprintf(fp, "id %llu ", ntohll(rta_getattr_u64(tb[LWTUNNEL_IP_ID]))); |
| 77 | |
| 78 | if (tb[LWTUNNEL_IP_SRC]) |
| 79 | fprintf(fp, "src %s ", |
Phil Sutter | 7faf158 | 2016-03-22 19:35:18 +0100 | [diff] [blame] | 80 | rt_addr_n2a_rta(AF_INET, tb[LWTUNNEL_IP_SRC])); |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 81 | |
| 82 | if (tb[LWTUNNEL_IP_DST]) |
| 83 | fprintf(fp, "dst %s ", |
Phil Sutter | 7faf158 | 2016-03-22 19:35:18 +0100 | [diff] [blame] | 84 | rt_addr_n2a_rta(AF_INET, tb[LWTUNNEL_IP_DST])); |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 85 | |
| 86 | if (tb[LWTUNNEL_IP_TTL]) |
| 87 | fprintf(fp, "ttl %d ", rta_getattr_u8(tb[LWTUNNEL_IP_TTL])); |
| 88 | |
| 89 | if (tb[LWTUNNEL_IP_TOS]) |
| 90 | fprintf(fp, "tos %d ", rta_getattr_u8(tb[LWTUNNEL_IP_TOS])); |
| 91 | } |
| 92 | |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 93 | static void print_encap_ila(FILE *fp, struct rtattr *encap) |
| 94 | { |
| 95 | struct rtattr *tb[ILA_ATTR_MAX+1]; |
| 96 | |
| 97 | parse_rtattr_nested(tb, ILA_ATTR_MAX, encap); |
| 98 | |
| 99 | if (tb[ILA_ATTR_LOCATOR]) { |
| 100 | char abuf[ADDR64_BUF_SIZE]; |
| 101 | |
| 102 | addr64_n2a(*(__u64 *)RTA_DATA(tb[ILA_ATTR_LOCATOR]), |
| 103 | abuf, sizeof(abuf)); |
| 104 | fprintf(fp, " %s ", abuf); |
| 105 | } |
| 106 | } |
| 107 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 108 | static void print_encap_ip6(FILE *fp, struct rtattr *encap) |
| 109 | { |
| 110 | struct rtattr *tb[LWTUNNEL_IP6_MAX+1]; |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 111 | |
| 112 | parse_rtattr_nested(tb, LWTUNNEL_IP6_MAX, encap); |
| 113 | |
| 114 | if (tb[LWTUNNEL_IP6_ID]) |
| 115 | fprintf(fp, "id %llu ", ntohll(rta_getattr_u64(tb[LWTUNNEL_IP6_ID]))); |
| 116 | |
| 117 | if (tb[LWTUNNEL_IP6_SRC]) |
| 118 | fprintf(fp, "src %s ", |
Phil Sutter | 7faf158 | 2016-03-22 19:35:18 +0100 | [diff] [blame] | 119 | rt_addr_n2a_rta(AF_INET6, tb[LWTUNNEL_IP6_SRC])); |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 120 | |
| 121 | if (tb[LWTUNNEL_IP6_DST]) |
| 122 | fprintf(fp, "dst %s ", |
Phil Sutter | 7faf158 | 2016-03-22 19:35:18 +0100 | [diff] [blame] | 123 | rt_addr_n2a_rta(AF_INET6, tb[LWTUNNEL_IP6_DST])); |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 124 | |
| 125 | if (tb[LWTUNNEL_IP6_HOPLIMIT]) |
| 126 | fprintf(fp, "hoplimit %d ", rta_getattr_u8(tb[LWTUNNEL_IP6_HOPLIMIT])); |
| 127 | |
| 128 | if (tb[LWTUNNEL_IP6_TC]) |
| 129 | fprintf(fp, "tc %d ", rta_getattr_u8(tb[LWTUNNEL_IP6_TC])); |
| 130 | } |
| 131 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 132 | void lwt_print_encap(FILE *fp, struct rtattr *encap_type, |
| 133 | struct rtattr *encap) |
| 134 | { |
| 135 | int et; |
| 136 | |
| 137 | if (!encap_type) |
| 138 | return; |
| 139 | |
| 140 | et = rta_getattr_u16(encap_type); |
| 141 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 142 | fprintf(fp, " encap %s ", format_encap_type(et)); |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 143 | |
| 144 | switch (et) { |
| 145 | case LWTUNNEL_ENCAP_MPLS: |
| 146 | print_encap_mpls(fp, encap); |
| 147 | break; |
| 148 | case LWTUNNEL_ENCAP_IP: |
| 149 | print_encap_ip(fp, encap); |
| 150 | break; |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 151 | case LWTUNNEL_ENCAP_ILA: |
| 152 | print_encap_ila(fp, encap); |
| 153 | break; |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 154 | case LWTUNNEL_ENCAP_IP6: |
| 155 | print_encap_ip6(fp, encap); |
| 156 | break; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | |
| 160 | static int parse_encap_mpls(struct rtattr *rta, size_t len, int *argcp, char ***argvp) |
| 161 | { |
| 162 | inet_prefix addr; |
| 163 | int argc = *argcp; |
| 164 | char **argv = *argvp; |
| 165 | |
| 166 | if (get_addr(&addr, *argv, AF_MPLS)) { |
| 167 | fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", *argv); |
| 168 | exit(1); |
| 169 | } |
| 170 | |
| 171 | rta_addattr_l(rta, len, MPLS_IPTUNNEL_DST, &addr.data, |
| 172 | addr.bytelen); |
| 173 | |
| 174 | *argcp = argc; |
| 175 | *argvp = argv; |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static int parse_encap_ip(struct rtattr *rta, size_t len, int *argcp, char ***argvp) |
| 181 | { |
| 182 | int id_ok = 0, dst_ok = 0, tos_ok = 0, ttl_ok = 0; |
| 183 | char **argv = *argvp; |
| 184 | int argc = *argcp; |
| 185 | |
| 186 | while (argc > 0) { |
| 187 | if (strcmp(*argv, "id") == 0) { |
| 188 | __u64 id; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 189 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 190 | NEXT_ARG(); |
| 191 | if (id_ok++) |
| 192 | duparg2("id", *argv); |
Sabrina Dubroca | 9f7401f | 2016-06-03 16:45:46 +0200 | [diff] [blame] | 193 | if (get_be64(&id, *argv, 0)) |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 194 | invarg("\"id\" value is invalid\n", *argv); |
Sabrina Dubroca | 9f7401f | 2016-06-03 16:45:46 +0200 | [diff] [blame] | 195 | rta_addattr64(rta, len, LWTUNNEL_IP_ID, id); |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 196 | } else if (strcmp(*argv, "dst") == 0) { |
| 197 | inet_prefix addr; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 198 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 199 | NEXT_ARG(); |
| 200 | if (dst_ok++) |
| 201 | duparg2("dst", *argv); |
| 202 | get_addr(&addr, *argv, AF_INET); |
| 203 | rta_addattr_l(rta, len, LWTUNNEL_IP_DST, &addr.data, addr.bytelen); |
| 204 | } else if (strcmp(*argv, "tos") == 0) { |
| 205 | __u32 tos; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 206 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 207 | NEXT_ARG(); |
| 208 | if (tos_ok++) |
| 209 | duparg2("tos", *argv); |
| 210 | if (rtnl_dsfield_a2n(&tos, *argv)) |
| 211 | invarg("\"tos\" value is invalid\n", *argv); |
| 212 | rta_addattr8(rta, len, LWTUNNEL_IP_TOS, tos); |
| 213 | } else if (strcmp(*argv, "ttl") == 0) { |
| 214 | __u8 ttl; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 215 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 216 | NEXT_ARG(); |
| 217 | if (ttl_ok++) |
| 218 | duparg2("ttl", *argv); |
| 219 | if (get_u8(&ttl, *argv, 0)) |
| 220 | invarg("\"ttl\" value is invalid\n", *argv); |
| 221 | rta_addattr8(rta, len, LWTUNNEL_IP_TTL, ttl); |
| 222 | } else { |
| 223 | break; |
| 224 | } |
Paolo Abeni | f0df408 | 2015-12-15 12:18:04 +0100 | [diff] [blame] | 225 | argc--; argv++; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Paolo Abeni | f0df408 | 2015-12-15 12:18:04 +0100 | [diff] [blame] | 228 | /* argv is currently the first unparsed argument, |
| 229 | * but the lwt_parse_encap() caller will move to the next, |
| 230 | * so step back */ |
| 231 | *argcp = argc + 1; |
| 232 | *argvp = argv - 1; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 237 | static int parse_encap_ila(struct rtattr *rta, size_t len, |
| 238 | int *argcp, char ***argvp) |
| 239 | { |
| 240 | __u64 locator; |
| 241 | int argc = *argcp; |
| 242 | char **argv = *argvp; |
| 243 | |
| 244 | if (get_addr64(&locator, *argv) < 0) { |
| 245 | fprintf(stderr, "Bad locator: %s\n", *argv); |
| 246 | exit(1); |
| 247 | } |
| 248 | |
| 249 | rta_addattr64(rta, 1024, ILA_ATTR_LOCATOR, locator); |
| 250 | |
| 251 | *argcp = argc; |
| 252 | *argvp = argv; |
| 253 | |
| 254 | return 0; |
| 255 | } |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 256 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 257 | static int parse_encap_ip6(struct rtattr *rta, size_t len, int *argcp, char ***argvp) |
| 258 | { |
| 259 | int id_ok = 0, dst_ok = 0, tos_ok = 0, ttl_ok = 0; |
| 260 | char **argv = *argvp; |
| 261 | int argc = *argcp; |
| 262 | |
| 263 | while (argc > 0) { |
| 264 | if (strcmp(*argv, "id") == 0) { |
| 265 | __u64 id; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 266 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 267 | NEXT_ARG(); |
| 268 | if (id_ok++) |
| 269 | duparg2("id", *argv); |
Sabrina Dubroca | 9f7401f | 2016-06-03 16:45:46 +0200 | [diff] [blame] | 270 | if (get_be64(&id, *argv, 0)) |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 271 | invarg("\"id\" value is invalid\n", *argv); |
Sabrina Dubroca | 9f7401f | 2016-06-03 16:45:46 +0200 | [diff] [blame] | 272 | rta_addattr64(rta, len, LWTUNNEL_IP6_ID, id); |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 273 | } else if (strcmp(*argv, "dst") == 0) { |
| 274 | inet_prefix addr; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 275 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 276 | NEXT_ARG(); |
| 277 | if (dst_ok++) |
| 278 | duparg2("dst", *argv); |
| 279 | get_addr(&addr, *argv, AF_INET6); |
| 280 | rta_addattr_l(rta, len, LWTUNNEL_IP6_DST, &addr.data, addr.bytelen); |
| 281 | } else if (strcmp(*argv, "tc") == 0) { |
| 282 | __u32 tc; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 283 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 284 | NEXT_ARG(); |
| 285 | if (tos_ok++) |
| 286 | duparg2("tc", *argv); |
| 287 | if (rtnl_dsfield_a2n(&tc, *argv)) |
| 288 | invarg("\"tc\" value is invalid\n", *argv); |
| 289 | rta_addattr8(rta, len, LWTUNNEL_IP6_TC, tc); |
| 290 | } else if (strcmp(*argv, "hoplimit") == 0) { |
| 291 | __u8 hoplimit; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 292 | |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 293 | NEXT_ARG(); |
| 294 | if (ttl_ok++) |
| 295 | duparg2("hoplimit", *argv); |
| 296 | if (get_u8(&hoplimit, *argv, 0)) |
| 297 | invarg("\"hoplimit\" value is invalid\n", *argv); |
| 298 | rta_addattr8(rta, len, LWTUNNEL_IP6_HOPLIMIT, hoplimit); |
| 299 | } else { |
| 300 | break; |
| 301 | } |
| 302 | argc--; argv++; |
| 303 | } |
| 304 | |
| 305 | /* argv is currently the first unparsed argument, |
| 306 | * but the lwt_parse_encap() caller will move to the next, |
| 307 | * so step back */ |
| 308 | *argcp = argc + 1; |
| 309 | *argvp = argv - 1; |
| 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 314 | int lwt_parse_encap(struct rtattr *rta, size_t len, int *argcp, char ***argvp) |
| 315 | { |
| 316 | struct rtattr *nest; |
| 317 | int argc = *argcp; |
| 318 | char **argv = *argvp; |
| 319 | __u16 type; |
| 320 | |
| 321 | NEXT_ARG(); |
| 322 | type = read_encap_type(*argv); |
| 323 | if (!type) |
| 324 | invarg("\"encap type\" value is invalid\n", *argv); |
| 325 | |
| 326 | NEXT_ARG(); |
| 327 | if (argc <= 1) { |
| 328 | fprintf(stderr, "Error: unexpected end of line after \"encap\"\n"); |
| 329 | exit(-1); |
| 330 | } |
| 331 | |
| 332 | nest = rta_nest(rta, 1024, RTA_ENCAP); |
| 333 | switch (type) { |
| 334 | case LWTUNNEL_ENCAP_MPLS: |
| 335 | parse_encap_mpls(rta, len, &argc, &argv); |
| 336 | break; |
| 337 | case LWTUNNEL_ENCAP_IP: |
| 338 | parse_encap_ip(rta, len, &argc, &argv); |
| 339 | break; |
Tom Herbert | 5866bdd | 2015-11-30 14:57:28 -0800 | [diff] [blame] | 340 | case LWTUNNEL_ENCAP_ILA: |
| 341 | parse_encap_ila(rta, len, &argc, &argv); |
| 342 | break; |
Paolo Abeni | d95cdcf | 2015-12-18 10:50:38 +0100 | [diff] [blame] | 343 | case LWTUNNEL_ENCAP_IP6: |
| 344 | parse_encap_ip6(rta, len, &argc, &argv); |
| 345 | break; |
Roopa Prabhu | 1e52930 | 2015-10-15 13:13:39 +0200 | [diff] [blame] | 346 | default: |
| 347 | fprintf(stderr, "Error: unsupported encap type\n"); |
| 348 | break; |
| 349 | } |
| 350 | rta_nest_end(rta, nest); |
| 351 | |
| 352 | rta_addattr16(rta, 1024, RTA_ENCAP_TYPE, type); |
| 353 | |
| 354 | *argcp = argc; |
| 355 | *argvp = argv; |
| 356 | |
| 357 | return 0; |
| 358 | } |