src/libsystemd/sd-rtnl/rtnl-types.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stddef.h>
  23 #include <stdint.h>
  24 #include <sys/socket.h>
  25 #include <linux/netlink.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/in6.h>
  28 #include <linux/veth.h>
  29 #include <linux/if_bridge.h>
  30 #include <linux/if_addr.h>
  31 #include <linux/if.h>
  32
  33 #include <linux/ip.h>
  34 #include <linux/if_tunnel.h>
  35
  36 #include "macro.h"
  37 #include "util.h"
  38
  39 #include "rtnl-types.h"
  40 #include "missing.h"
  41
  42 static const NLTypeSystem rtnl_link_type_system;
  43
  44 static const NLType rtnl_link_info_data_veth_types[VETH_INFO_MAX + 1] = {
  45         [VETH_INFO_PEER]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
  46 };
  47
  48
  49 static const NLType rtnl_link_info_data_macvlan_types[IFLA_MACVLAN_MAX + 1] = {
  50         [IFLA_MACVLAN_MODE]  = { .type = NLA_U32 },
  51         [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
  52 };
  53
  54 static const NLType rtnl_link_info_data_bridge_types[IFLA_BRIDGE_MAX + 1] = {
  55         [IFLA_BRIDGE_FLAGS]     = { .type = NLA_U16 },
  56         [IFLA_BRIDGE_MODE]      = { .type = NLA_U16 },
  57 /*
  58         [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY,
  59                                     .len = sizeof(struct bridge_vlan_info), },
  60 */
  61 };
  62
  63 static const NLType rtnl_link_info_data_vlan_types[IFLA_VLAN_MAX + 1] = {
  64         [IFLA_VLAN_ID]          = { .type = NLA_U16 },
  65 /*
  66         [IFLA_VLAN_FLAGS]       = { .len = sizeof(struct ifla_vlan_flags) },
  67         [IFLA_VLAN_EGRESS_QOS]  = { .type = NLA_NESTED },
  68         [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
  69 */
  70         [IFLA_VLAN_PROTOCOL]    = { .type = NLA_U16 },
  71 };
  72
  73 static const NLType rtnl_link_info_data_vxlan_types[IFLA_VXLAN_MAX+1] = {
  74         [IFLA_VXLAN_ID] = { .type = NLA_U32 },
  75         [IFLA_VXLAN_GROUP] = {.type = NLA_IN_ADDR },
  76         [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
  77         [IFLA_VXLAN_LOCAL] = { .type = NLA_U32},
  78         [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
  79         [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
  80         [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
  81         [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
  82         [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
  83         [IFLA_VXLAN_PORT_RANGE] = { .type = NLA_U32},
  84         [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
  85         [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
  86         [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
  87         [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
  88 };
  89
  90 static const NLType rtnl_link_info_data_bond_types[IFLA_BOND_MAX + 1] = {
  91         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  92         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  93 #ifdef IFLA_BOND_MIIMON
  94         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  95         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  96         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  97         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  98         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
  99 /*
 100         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
 101 */
 102         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
 103         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
 104         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
 105         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
 106         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
 107         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
 108         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
 109         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 110         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 111         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 112         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 113         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 114         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 115         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 116 /*
 117         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 118 */
 119 #endif
 120 };
 121
 122 static const NLType rtnl_link_info_data_iptun_types[IFLA_IPTUN_MAX + 1] = {
 123         [IFLA_IPTUN_LINK]                = { .type = NLA_U32 },
 124         [IFLA_IPTUN_LOCAL]               = { .type = NLA_IN_ADDR },
 125         [IFLA_IPTUN_REMOTE]              = { .type = NLA_IN_ADDR },
 126         [IFLA_IPTUN_TTL]                 = { .type = NLA_U8 },
 127         [IFLA_IPTUN_TOS]                 = { .type = NLA_U8 },
 128         [IFLA_IPTUN_PMTUDISC]            = { .type = NLA_U8 },
 129         [IFLA_IPTUN_FLAGS]               = { .type = NLA_U16 },
 130         [IFLA_IPTUN_PROTO]               = { .type = NLA_U8 },
 131         [IFLA_IPTUN_6RD_PREFIX]          = { .type = NLA_IN_ADDR },
 132         [IFLA_IPTUN_6RD_RELAY_PREFIX]    = { .type = NLA_U32 },
 133         [IFLA_IPTUN_6RD_PREFIXLEN]       = { .type = NLA_U16 },
 134         [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 },
 135 };
 136
 137 static  const NLType rtnl_link_info_data_ipgre_types[IFLA_GRE_MAX + 1] = {
 138         [IFLA_GRE_LINK]     = { .type = NLA_U32 },
 139         [IFLA_GRE_IFLAGS]   = { .type = NLA_U16 },
 140         [IFLA_GRE_OFLAGS]   = { .type = NLA_U16 },
 141         [IFLA_GRE_IKEY]     = { .type = NLA_U32 },
 142         [IFLA_GRE_OKEY]     = { .type = NLA_U32 },
 143         [IFLA_GRE_LOCAL]    = { .type = NLA_IN_ADDR },
 144         [IFLA_GRE_REMOTE]   = { .type = NLA_IN_ADDR },
 145         [IFLA_GRE_TTL]      = { .type = NLA_U8 },
 146         [IFLA_GRE_TOS]      = { .type = NLA_U8 },
 147         [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
 148 };
 149
 150 static const NLType rtnl_link_info_data_ipvti_types[IFLA_VTI_MAX + 1] = {
 151         [IFLA_VTI_LINK]         = { .type = NLA_U32 },
 152         [IFLA_VTI_IKEY]         = { .type = NLA_U32 },
 153         [IFLA_VTI_OKEY]         = { .type = NLA_U32 },
 154         [IFLA_VTI_LOCAL]        = { .type = NLA_IN_ADDR  },
 155         [IFLA_VTI_REMOTE]       = { .type = NLA_IN_ADDR  },
 156 };
 157
 158 /* these strings must match the .kind entries in the kernel */
 159 static const char* const nl_union_link_info_data_table[_NL_UNION_LINK_INFO_DATA_MAX] = {
 160         [NL_UNION_LINK_INFO_DATA_BOND] = "bond",
 161         [NL_UNION_LINK_INFO_DATA_BRIDGE] = "bridge",
 162         [NL_UNION_LINK_INFO_DATA_VLAN] = "vlan",
 163         [NL_UNION_LINK_INFO_DATA_VETH] = "veth",
 164         [NL_UNION_LINK_INFO_DATA_DUMMY] = "dummy",
 165         [NL_UNION_LINK_INFO_DATA_MACVLAN] = "macvlan",
 166         [NL_UNION_LINK_INFO_DATA_VXLAN] = "vxlan",
 167         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = "ipip",
 168         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = "gre",
 169         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] = "sit",
 170         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] = "vti",
 171 };
 172
 173 DEFINE_STRING_TABLE_LOOKUP(nl_union_link_info_data, NLUnionLinkInfoData);
 174
 175 static const NLTypeSystem rtnl_link_info_data_type_systems[_NL_UNION_LINK_INFO_DATA_MAX] = {
 176         [NL_UNION_LINK_INFO_DATA_BOND] =        { .max = ELEMENTSOF(rtnl_link_info_data_bond_types) - 1,
 177                                                   .types = rtnl_link_info_data_bond_types },
 178         [NL_UNION_LINK_INFO_DATA_BRIDGE] =      { .max = ELEMENTSOF(rtnl_link_info_data_bridge_types) - 1,
 179                                                   .types = rtnl_link_info_data_bridge_types },
 180         [NL_UNION_LINK_INFO_DATA_VLAN] =        { .max = ELEMENTSOF(rtnl_link_info_data_vlan_types) - 1,
 181                                                   .types = rtnl_link_info_data_vlan_types },
 182         [NL_UNION_LINK_INFO_DATA_VETH] =        { .max = ELEMENTSOF(rtnl_link_info_data_veth_types) - 1,
 183                                                   .types = rtnl_link_info_data_veth_types },
 184         [NL_UNION_LINK_INFO_DATA_MACVLAN] =     { .max = ELEMENTSOF(rtnl_link_info_data_macvlan_types) - 1,
 185                                                   .types = rtnl_link_info_data_macvlan_types },
 186         [NL_UNION_LINK_INFO_DATA_VXLAN] =       { .max = ELEMENTSOF(rtnl_link_info_data_vxlan_types) - 1,
 187                                                   .types = rtnl_link_info_data_vxlan_types },
 188         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 189                                                   .types = rtnl_link_info_data_iptun_types },
 190         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 191                                                     .types = rtnl_link_info_data_ipgre_types },
 192         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 193                                                   .types = rtnl_link_info_data_iptun_types },
 194         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipvti_types) - 1,
 195                                                   .types = rtnl_link_info_data_ipvti_types },
 196 };
 197
 198 static const NLTypeSystemUnion rtnl_link_info_data_type_system_union = {
 199         .num = _NL_UNION_LINK_INFO_DATA_MAX,
 200         .lookup = nl_union_link_info_data_from_string,
 201         .type_systems = rtnl_link_info_data_type_systems,
 202         .match = IFLA_INFO_KIND,
 203 };
 204
 205 static const NLType rtnl_link_info_types[IFLA_INFO_MAX + 1] = {
 206         [IFLA_INFO_KIND]        = { .type = NLA_STRING },
 207         [IFLA_INFO_DATA]        = { .type = NLA_UNION, .type_system_union = &rtnl_link_info_data_type_system_union},
 208 /*
 209         [IFLA_INFO_XSTATS],
 210         [IFLA_INFO_SLAVE_KIND]  = { .type = NLA_STRING },
 211         [IFLA_INFO_SLAVE_DATA]  = { .type = NLA_NESTED },
 212 */
 213 };
 214
 215 static const NLTypeSystem rtnl_link_info_type_system = {
 216         .max = ELEMENTSOF(rtnl_link_info_types) - 1,
 217         .types = rtnl_link_info_types,
 218 };
 219
 220 static const NLType rtnl_link_types[IFLA_MAX + 1] = {
 221         [IFLA_ADDRESS]          = { .type = NLA_ETHER_ADDR, },
 222         [IFLA_BROADCAST]        = { .type = NLA_ETHER_ADDR, },
 223         [IFLA_IFNAME]           = { .type = NLA_STRING, .size = IFNAMSIZ - 1, },
 224         [IFLA_MTU]              = { .type = NLA_U32 },
 225         [IFLA_LINK]             = { .type = NLA_U32 },
 226 /*
 227         [IFLA_QDISC],
 228         [IFLA_STATS],
 229         [IFLA_COST],
 230         [IFLA_PRIORITY],
 231 */
 232         [IFLA_MASTER]           = { .type = NLA_U32 },
 233 /*
 234         [IFLA_WIRELESS],
 235         [IFLA_PROTINFO],
 236 */
 237         [IFLA_TXQLEN]           = { .type = NLA_U32 },
 238 /*
 239         [IFLA_MAP]              = { .len = sizeof(struct rtnl_link_ifmap) },
 240 */
 241         [IFLA_WEIGHT]           = { .type = NLA_U32 },
 242         [IFLA_OPERSTATE]        = { .type = NLA_U8 },
 243         [IFLA_LINKMODE]         = { .type = NLA_U8 },
 244         [IFLA_LINKINFO]         = { .type = NLA_NESTED, .type_system = &rtnl_link_info_type_system },
 245         [IFLA_NET_NS_PID]       = { .type = NLA_U32 },
 246         [IFLA_IFALIAS]          = { .type = NLA_STRING, .size = IFALIASZ - 1 },
 247 /*
 248         [IFLA_NUM_VF],
 249         [IFLA_VFINFO_LIST]      = {. type = NLA_NESTED, },
 250         [IFLA_STATS64],
 251         [IFLA_VF_PORTS]         = { .type = NLA_NESTED },
 252         [IFLA_PORT_SELF]        = { .type = NLA_NESTED },
 253         [IFLA_AF_SPEC]          = { .type = NLA_NESTED },
 254         [IFLA_VF_PORTS],
 255         [IFLA_PORT_SELF],
 256         [IFLA_AF_SPEC],
 257 */
 258         [IFLA_GROUP]            = { .type = NLA_U32 },
 259         [IFLA_NET_NS_FD]        = { .type = NLA_U32 },
 260         [IFLA_EXT_MASK]         = { .type = NLA_U32 },
 261         [IFLA_PROMISCUITY]      = { .type = NLA_U32 },
 262         [IFLA_NUM_TX_QUEUES]    = { .type = NLA_U32 },
 263         [IFLA_NUM_RX_QUEUES]    = { .type = NLA_U32 },
 264         [IFLA_CARRIER]          = { .type = NLA_U8 },
 265 /*
 266         [IFLA_PHYS_PORT_ID]     = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
 267 */
 268 };
 269
 270 static const NLTypeSystem rtnl_link_type_system = {
 271         .max = ELEMENTSOF(rtnl_link_types) - 1,
 272         .types = rtnl_link_types,
 273 };
 274
 275 static const NLType rtnl_address_types[IFA_MAX + 1] = {
 276         [IFA_ADDRESS]           = { .type = NLA_IN_ADDR },
 277         [IFA_LOCAL]             = { .type = NLA_IN_ADDR },
 278         [IFA_LABEL]             = { .type = NLA_STRING, .size = IFNAMSIZ - 1 },
 279         [IFA_BROADCAST]         = { .type = NLA_IN_ADDR }, /* 6? */
 280         [IFA_CACHEINFO]         = { .type = NLA_CACHE_INFO, .size = sizeof(struct ifa_cacheinfo) },
 281 /*
 282         [IFA_ANYCAST],
 283         [IFA_MULTICAST],
 284 */
 285 #ifdef IFA_FLAGS
 286         [IFA_FLAGS]             = { .type = NLA_U32 },
 287 #endif
 288 };
 289
 290 static const NLTypeSystem rtnl_address_type_system = {
 291         .max = ELEMENTSOF(rtnl_address_types) - 1,
 292         .types = rtnl_address_types,
 293 };
 294
 295 static const NLType rtnl_route_types[RTA_MAX + 1] = {
 296         [RTA_DST]               = { .type = NLA_IN_ADDR }, /* 6? */
 297         [RTA_SRC]               = { .type = NLA_IN_ADDR }, /* 6? */
 298         [RTA_IIF]               = { .type = NLA_U32 },
 299         [RTA_OIF]               = { .type = NLA_U32 },
 300         [RTA_GATEWAY]           = { .type = NLA_IN_ADDR },
 301         [RTA_PRIORITY]          = { .type = NLA_U32 },
 302         [RTA_PREFSRC]           = { .type = NLA_IN_ADDR }, /* 6? */
 303 /*
 304         [RTA_METRICS]           = { .type = NLA_NESTED },
 305         [RTA_MULTIPATH]         = { .len = sizeof(struct rtnexthop) },
 306 */
 307         [RTA_FLOW]              = { .type = NLA_U32 }, /* 6? */
 308 /*
 309         RTA_CACHEINFO,
 310         RTA_TABLE,
 311         RTA_MARK,
 312         RTA_MFC_STATS,
 313 */
 314 };
 315
 316 static const NLTypeSystem rtnl_route_type_system = {
 317         .max = ELEMENTSOF(rtnl_route_types) - 1,
 318         .types = rtnl_route_types,
 319 };
 320
 321 static const NLType rtnl_types[RTM_MAX + 1] = {
 322         [NLMSG_ERROR]  = { .type = NLA_META, .size = sizeof(struct nlmsgerr) },
 323         [RTM_NEWLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 324         [RTM_DELLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 325         [RTM_GETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 326         [RTM_SETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 327         [RTM_NEWADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 328         [RTM_DELADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 329         [RTM_GETADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 330         [RTM_NEWROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 331         [RTM_DELROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 332         [RTM_GETROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 333 };
 334
 335 const NLTypeSystem rtnl_type_system = {
 336         .max = ELEMENTSOF(rtnl_types) - 1,
 337         .types = rtnl_types,
 338 };
 339
 340 int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type) {
 341         const NLType *nl_type;
 342
 343         assert(ret);
 344
 345         if (!type_system)
 346                 type_system = &rtnl_type_system;
 347
 348         assert(type_system->types);
 349
 350         if (type > type_system->max)
 351                 return -ENOTSUP;
 352
 353         nl_type = &type_system->types[type];
 354
 355         if (nl_type->type == NLA_UNSPEC)
 356                 return -ENOTSUP;
 357
 358         *ret = nl_type;
 359
 360         return 0;
 361 }
 362
 363 int type_system_get_type_system(const NLTypeSystem *type_system, const NLTypeSystem **ret, uint16_t type) {
 364         const NLType *nl_type;
 365         int r;
 366
 367         assert(ret);
 368
 369         r = type_system_get_type(type_system, &nl_type, type);
 370         if (r < 0)
 371                 return r;
 372
 373         assert_return(nl_type->type == NLA_NESTED, -EINVAL);
 374
 375         assert(nl_type->type_system);
 376
 377         *ret = nl_type->type_system;
 378
 379         return 0;
 380 }
 381
 382 int type_system_get_type_system_union(const NLTypeSystem *type_system, const NLTypeSystemUnion **ret, uint16_t type) {
 383         const NLType *nl_type;
 384         int r;
 385
 386         assert(ret);
 387
 388         r = type_system_get_type(type_system, &nl_type, type);
 389         if (r < 0)
 390                 return r;
 391
 392         assert_return(nl_type->type == NLA_UNION, -EINVAL);
 393
 394         assert(nl_type->type_system_union);
 395
 396         *ret = nl_type->type_system_union;
 397
 398         return 0;
 399 }
 400
 401 int type_system_union_get_type_system(const NLTypeSystemUnion *type_system_union, const NLTypeSystem **ret, const char *key) {
 402         int type;
 403
 404         assert(type_system_union);
 405         assert(type_system_union->lookup);
 406         assert(type_system_union->type_systems);
 407         assert(ret);
 408         assert(key);
 409
 410         type = type_system_union->lookup(key);
 411         if (type < 0)
 412                 return -ENOTSUP;
 413
 414         assert(type < type_system_union->num);
 415
 416         *ret = &type_system_union->type_systems[type];
 417
 418         return 0;
 419 }