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_link.h>
  35 #include <linux/if_tunnel.h>
  36
  37 #include "macro.h"
  38 #include "util.h"
  39
  40 #include "rtnl-types.h"
  41 #include "missing.h"
  42
  43 static const NLTypeSystem rtnl_link_type_system;
  44
  45 static const NLType rtnl_link_info_data_veth_types[VETH_INFO_MAX + 1] = {
  46         [VETH_INFO_PEER]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
  47 };
  48
  49 static const NLType rtnl_link_info_data_ipvlan_types[IFLA_IPVLAN_MAX + 1] = {
  50         [IFLA_IPVLAN_MODE]  = { .type = NLA_U16 },
  51 };
  52
  53 static const NLType rtnl_link_info_data_macvlan_types[IFLA_MACVLAN_MAX + 1] = {
  54         [IFLA_MACVLAN_MODE]  = { .type = NLA_U32 },
  55         [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
  56 };
  57
  58 static const NLType rtnl_link_info_data_bridge_types[IFLA_BRIDGE_MAX + 1] = {
  59         [IFLA_BRIDGE_FLAGS]     = { .type = NLA_U16 },
  60         [IFLA_BRIDGE_MODE]      = { .type = NLA_U16 },
  61 /*
  62         [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY,
  63                                     .len = sizeof(struct bridge_vlan_info), },
  64 */
  65 };
  66
  67 static const NLType rtnl_link_info_data_vlan_types[IFLA_VLAN_MAX + 1] = {
  68         [IFLA_VLAN_ID]          = { .type = NLA_U16 },
  69 /*
  70         [IFLA_VLAN_FLAGS]       = { .len = sizeof(struct ifla_vlan_flags) },
  71         [IFLA_VLAN_EGRESS_QOS]  = { .type = NLA_NESTED },
  72         [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
  73 */
  74         [IFLA_VLAN_PROTOCOL]    = { .type = NLA_U16 },
  75 };
  76
  77 static const NLType rtnl_link_info_data_vxlan_types[IFLA_VXLAN_MAX+1] = {
  78         [IFLA_VXLAN_ID] = { .type = NLA_U32 },
  79         [IFLA_VXLAN_GROUP] = {.type = NLA_IN_ADDR },
  80         [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
  81         [IFLA_VXLAN_LOCAL] = { .type = NLA_U32},
  82         [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
  83         [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
  84         [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
  85         [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
  86         [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
  87         [IFLA_VXLAN_PORT_RANGE] = { .type = NLA_U32},
  88         [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
  89         [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
  90         [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
  91         [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
  92 };
  93
  94 static const NLType rtnl_link_info_data_bond_types[IFLA_BOND_MAX + 1] = {
  95         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  96         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  97         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  98         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  99         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
 100         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
 101         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
 102         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
 103         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
 104         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
 105         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
 106         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
 107         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
 108         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
 109         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
 110         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 111         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 112         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 113         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 114         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 115         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 116         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 117         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 118 };
 119
 120 static const NLType rtnl_link_info_data_iptun_types[IFLA_IPTUN_MAX + 1] = {
 121         [IFLA_IPTUN_LINK]                = { .type = NLA_U32 },
 122         [IFLA_IPTUN_LOCAL]               = { .type = NLA_IN_ADDR },
 123         [IFLA_IPTUN_REMOTE]              = { .type = NLA_IN_ADDR },
 124         [IFLA_IPTUN_TTL]                 = { .type = NLA_U8 },
 125         [IFLA_IPTUN_TOS]                 = { .type = NLA_U8 },
 126         [IFLA_IPTUN_PMTUDISC]            = { .type = NLA_U8 },
 127         [IFLA_IPTUN_FLAGS]               = { .type = NLA_U16 },
 128         [IFLA_IPTUN_PROTO]               = { .type = NLA_U8 },
 129         [IFLA_IPTUN_6RD_PREFIX]          = { .type = NLA_IN_ADDR },
 130         [IFLA_IPTUN_6RD_RELAY_PREFIX]    = { .type = NLA_U32 },
 131         [IFLA_IPTUN_6RD_PREFIXLEN]       = { .type = NLA_U16 },
 132         [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 },
 133 };
 134
 135 static  const NLType rtnl_link_info_data_ipgre_types[IFLA_GRE_MAX + 1] = {
 136         [IFLA_GRE_LINK]     = { .type = NLA_U32 },
 137         [IFLA_GRE_IFLAGS]   = { .type = NLA_U16 },
 138         [IFLA_GRE_OFLAGS]   = { .type = NLA_U16 },
 139         [IFLA_GRE_IKEY]     = { .type = NLA_U32 },
 140         [IFLA_GRE_OKEY]     = { .type = NLA_U32 },
 141         [IFLA_GRE_LOCAL]    = { .type = NLA_IN_ADDR },
 142         [IFLA_GRE_REMOTE]   = { .type = NLA_IN_ADDR },
 143         [IFLA_GRE_TTL]      = { .type = NLA_U8 },
 144         [IFLA_GRE_TOS]      = { .type = NLA_U8 },
 145         [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
 146 };
 147
 148 static const NLType rtnl_link_info_data_ipvti_types[IFLA_VTI_MAX + 1] = {
 149         [IFLA_VTI_LINK]         = { .type = NLA_U32 },
 150         [IFLA_VTI_IKEY]         = { .type = NLA_U32 },
 151         [IFLA_VTI_OKEY]         = { .type = NLA_U32 },
 152         [IFLA_VTI_LOCAL]        = { .type = NLA_IN_ADDR  },
 153         [IFLA_VTI_REMOTE]       = { .type = NLA_IN_ADDR  },
 154 };
 155
 156 static const NLType rtnl_link_info_data_ip6tnl_types[IFLA_IPTUN_MAX + 1] = {
 157         [IFLA_IPTUN_LINK]                = { .type = NLA_U32 },
 158         [IFLA_IPTUN_LOCAL]               = { .type = NLA_IN_ADDR },
 159         [IFLA_IPTUN_REMOTE]              = { .type = NLA_IN_ADDR },
 160         [IFLA_IPTUN_TTL]                 = { .type = NLA_U8 },
 161         [IFLA_IPTUN_FLAGS]               = { .type = NLA_U32 },
 162         [IFLA_IPTUN_PROTO]               = { .type = NLA_U8 },
 163         [IFLA_IPTUN_ENCAP_LIMIT]         = { .type = NLA_U8 },
 164         [IFLA_IPTUN_FLOWINFO]            = { .type = NLA_U32},
 165 };
 166
 167 /* these strings must match the .kind entries in the kernel */
 168 static const char* const nl_union_link_info_data_table[_NL_UNION_LINK_INFO_DATA_MAX] = {
 169         [NL_UNION_LINK_INFO_DATA_BOND] = "bond",
 170         [NL_UNION_LINK_INFO_DATA_BRIDGE] = "bridge",
 171         [NL_UNION_LINK_INFO_DATA_VLAN] = "vlan",
 172         [NL_UNION_LINK_INFO_DATA_VETH] = "veth",
 173         [NL_UNION_LINK_INFO_DATA_DUMMY] = "dummy",
 174         [NL_UNION_LINK_INFO_DATA_MACVLAN] = "macvlan",
 175         [NL_UNION_LINK_INFO_DATA_IPVLAN] = "ipvlan",
 176         [NL_UNION_LINK_INFO_DATA_VXLAN] = "vxlan",
 177         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = "ipip",
 178         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = "gre",
 179         [NL_UNION_LINK_INFO_DATA_IPGRETAP_TUNNEL] = "gretap",
 180         [NL_UNION_LINK_INFO_DATA_IP6GRE_TUNNEL] = "ip6gre",
 181         [NL_UNION_LINK_INFO_DATA_IP6GRETAP_TUNNEL] = "ip6gretap",
 182         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] = "sit",
 183         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] = "vti",
 184         [NL_UNION_LINK_INFO_DATA_IP6TNL_TUNNEL] = "ip6tnl",
 185 };
 186
 187 DEFINE_STRING_TABLE_LOOKUP(nl_union_link_info_data, NLUnionLinkInfoData);
 188
 189 static const NLTypeSystem rtnl_link_info_data_type_systems[_NL_UNION_LINK_INFO_DATA_MAX] = {
 190         [NL_UNION_LINK_INFO_DATA_BOND] =        { .max = ELEMENTSOF(rtnl_link_info_data_bond_types) - 1,
 191                                                   .types = rtnl_link_info_data_bond_types },
 192         [NL_UNION_LINK_INFO_DATA_BRIDGE] =      { .max = ELEMENTSOF(rtnl_link_info_data_bridge_types) - 1,
 193                                                   .types = rtnl_link_info_data_bridge_types },
 194         [NL_UNION_LINK_INFO_DATA_VLAN] =        { .max = ELEMENTSOF(rtnl_link_info_data_vlan_types) - 1,
 195                                                   .types = rtnl_link_info_data_vlan_types },
 196         [NL_UNION_LINK_INFO_DATA_VETH] =        { .max = ELEMENTSOF(rtnl_link_info_data_veth_types) - 1,
 197                                                   .types = rtnl_link_info_data_veth_types },
 198         [NL_UNION_LINK_INFO_DATA_MACVLAN] =     { .max = ELEMENTSOF(rtnl_link_info_data_macvlan_types) - 1,
 199                                                   .types = rtnl_link_info_data_macvlan_types },
 200         [NL_UNION_LINK_INFO_DATA_IPVLAN] =      { .max = ELEMENTSOF(rtnl_link_info_data_ipvlan_types) - 1,
 201                                                   .types = rtnl_link_info_data_ipvlan_types },
 202         [NL_UNION_LINK_INFO_DATA_VXLAN] =       { .max = ELEMENTSOF(rtnl_link_info_data_vxlan_types) - 1,
 203                                                   .types = rtnl_link_info_data_vxlan_types },
 204         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 205                                                   .types = rtnl_link_info_data_iptun_types },
 206         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 207                                                     .types = rtnl_link_info_data_ipgre_types },
 208         [NL_UNION_LINK_INFO_DATA_IPGRETAP_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 209                                                     .types = rtnl_link_info_data_ipgre_types },
 210         [NL_UNION_LINK_INFO_DATA_IP6GRE_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 211                                                     .types = rtnl_link_info_data_ipgre_types },
 212         [NL_UNION_LINK_INFO_DATA_IP6GRETAP_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 213                                                     .types = rtnl_link_info_data_ipgre_types },
 214         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 215                                                   .types = rtnl_link_info_data_iptun_types },
 216         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipvti_types) - 1,
 217                                                   .types = rtnl_link_info_data_ipvti_types },
 218         [NL_UNION_LINK_INFO_DATA_IP6TNL_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ip6tnl_types) - 1,
 219                                                      .types = rtnl_link_info_data_ip6tnl_types },
 220
 221 };
 222
 223 static const NLTypeSystemUnion rtnl_link_info_data_type_system_union = {
 224         .num = _NL_UNION_LINK_INFO_DATA_MAX,
 225         .lookup = nl_union_link_info_data_from_string,
 226         .type_systems = rtnl_link_info_data_type_systems,
 227         .match_type = NL_MATCH_SIBLING,
 228         .match = IFLA_INFO_KIND,
 229 };
 230
 231 static const NLType rtnl_link_info_types[IFLA_INFO_MAX + 1] = {
 232         [IFLA_INFO_KIND]        = { .type = NLA_STRING },
 233         [IFLA_INFO_DATA]        = { .type = NLA_UNION, .type_system_union = &rtnl_link_info_data_type_system_union},
 234 /*
 235         [IFLA_INFO_XSTATS],
 236         [IFLA_INFO_SLAVE_KIND]  = { .type = NLA_STRING },
 237         [IFLA_INFO_SLAVE_DATA]  = { .type = NLA_NESTED },
 238 */
 239 };
 240
 241 static const NLTypeSystem rtnl_link_info_type_system = {
 242         .max = ELEMENTSOF(rtnl_link_info_types) - 1,
 243         .types = rtnl_link_info_types,
 244 };
 245
 246 static const struct NLType rtnl_prot_info_bridge_port_types[IFLA_BRPORT_MAX + 1] = {
 247         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 248         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 249         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 250         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 251         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 252         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 253         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 254         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 255 };
 256
 257 static const NLTypeSystem rtnl_prot_info_type_systems[AF_MAX] = {
 258         [AF_BRIDGE] =   { .max = ELEMENTSOF(rtnl_prot_info_bridge_port_types) - 1,
 259                           .types = rtnl_prot_info_bridge_port_types },
 260 };
 261
 262 static const NLTypeSystemUnion rtnl_prot_info_type_system_union = {
 263         .num = AF_MAX,
 264         .type_systems = rtnl_prot_info_type_systems,
 265         .match_type = NL_MATCH_PROTOCOL,
 266 };
 267
 268 static const NLType rtnl_link_types[IFLA_MAX + 1 ] = {
 269         [IFLA_ADDRESS]          = { .type = NLA_ETHER_ADDR, },
 270         [IFLA_BROADCAST]        = { .type = NLA_ETHER_ADDR, },
 271         [IFLA_IFNAME]           = { .type = NLA_STRING, .size = IFNAMSIZ - 1, },
 272         [IFLA_MTU]              = { .type = NLA_U32 },
 273         [IFLA_LINK]             = { .type = NLA_U32 },
 274 /*
 275         [IFLA_QDISC],
 276         [IFLA_STATS],
 277         [IFLA_COST],
 278         [IFLA_PRIORITY],
 279 */
 280         [IFLA_MASTER]           = { .type = NLA_U32 },
 281 /*
 282         [IFLA_WIRELESS],
 283 */
 284         [IFLA_PROTINFO]         = { .type = NLA_UNION, .type_system_union = &rtnl_prot_info_type_system_union },
 285         [IFLA_TXQLEN]           = { .type = NLA_U32 },
 286 /*
 287         [IFLA_MAP]              = { .len = sizeof(struct rtnl_link_ifmap) },
 288 */
 289         [IFLA_WEIGHT]           = { .type = NLA_U32 },
 290         [IFLA_OPERSTATE]        = { .type = NLA_U8 },
 291         [IFLA_LINKMODE]         = { .type = NLA_U8 },
 292         [IFLA_LINKINFO]         = { .type = NLA_NESTED, .type_system = &rtnl_link_info_type_system },
 293         [IFLA_NET_NS_PID]       = { .type = NLA_U32 },
 294         [IFLA_IFALIAS]          = { .type = NLA_STRING, .size = IFALIASZ - 1 },
 295 /*
 296         [IFLA_NUM_VF],
 297         [IFLA_VFINFO_LIST]      = {. type = NLA_NESTED, },
 298         [IFLA_STATS64],
 299         [IFLA_VF_PORTS]         = { .type = NLA_NESTED },
 300         [IFLA_PORT_SELF]        = { .type = NLA_NESTED },
 301         [IFLA_AF_SPEC]          = { .type = NLA_NESTED },
 302         [IFLA_VF_PORTS],
 303         [IFLA_PORT_SELF],
 304         [IFLA_AF_SPEC],
 305 */
 306         [IFLA_GROUP]            = { .type = NLA_U32 },
 307         [IFLA_NET_NS_FD]        = { .type = NLA_U32 },
 308         [IFLA_EXT_MASK]         = { .type = NLA_U32 },
 309         [IFLA_PROMISCUITY]      = { .type = NLA_U32 },
 310         [IFLA_NUM_TX_QUEUES]    = { .type = NLA_U32 },
 311         [IFLA_NUM_RX_QUEUES]    = { .type = NLA_U32 },
 312         [IFLA_CARRIER]          = { .type = NLA_U8 },
 313 /*
 314         [IFLA_PHYS_PORT_ID]     = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
 315 */
 316 };
 317
 318 static const NLTypeSystem rtnl_link_type_system = {
 319         .max = ELEMENTSOF(rtnl_link_types) - 1,
 320         .types = rtnl_link_types,
 321 };
 322
 323 static const NLType rtnl_address_types[IFA_MAX + 1] = {
 324         [IFA_ADDRESS]           = { .type = NLA_IN_ADDR },
 325         [IFA_LOCAL]             = { .type = NLA_IN_ADDR },
 326         [IFA_LABEL]             = { .type = NLA_STRING, .size = IFNAMSIZ - 1 },
 327         [IFA_BROADCAST]         = { .type = NLA_IN_ADDR }, /* 6? */
 328         [IFA_CACHEINFO]         = { .type = NLA_CACHE_INFO, .size = sizeof(struct ifa_cacheinfo) },
 329 /*
 330         [IFA_ANYCAST],
 331         [IFA_MULTICAST],
 332 */
 333 #ifdef IFA_FLAGS
 334         [IFA_FLAGS]             = { .type = NLA_U32 },
 335 #endif
 336 };
 337
 338 static const NLTypeSystem rtnl_address_type_system = {
 339         .max = ELEMENTSOF(rtnl_address_types) - 1,
 340         .types = rtnl_address_types,
 341 };
 342
 343 static const NLType rtnl_route_types[RTA_MAX + 1] = {
 344         [RTA_DST]               = { .type = NLA_IN_ADDR }, /* 6? */
 345         [RTA_SRC]               = { .type = NLA_IN_ADDR }, /* 6? */
 346         [RTA_IIF]               = { .type = NLA_U32 },
 347         [RTA_OIF]               = { .type = NLA_U32 },
 348         [RTA_GATEWAY]           = { .type = NLA_IN_ADDR },
 349         [RTA_PRIORITY]          = { .type = NLA_U32 },
 350         [RTA_PREFSRC]           = { .type = NLA_IN_ADDR }, /* 6? */
 351 /*
 352         [RTA_METRICS]           = { .type = NLA_NESTED },
 353         [RTA_MULTIPATH]         = { .len = sizeof(struct rtnexthop) },
 354 */
 355         [RTA_FLOW]              = { .type = NLA_U32 }, /* 6? */
 356 /*
 357         RTA_CACHEINFO,
 358         RTA_TABLE,
 359         RTA_MARK,
 360         RTA_MFC_STATS,
 361 */
 362 };
 363
 364 static const NLTypeSystem rtnl_route_type_system = {
 365         .max = ELEMENTSOF(rtnl_route_types) - 1,
 366         .types = rtnl_route_types,
 367 };
 368
 369 static const NLType rtnl_neigh_types[NDA_MAX + 1] = {
 370         [NDA_DST]               = { .type = NLA_IN_ADDR },
 371         [NDA_LLADDR]            = { .type = NLA_ETHER_ADDR },
 372         [NDA_CACHEINFO]         = { .type = NLA_CACHE_INFO, .size = sizeof(struct nda_cacheinfo) },
 373         [NDA_PROBES]            = { .type = NLA_U32 },
 374         [NDA_VLAN]              = { .type = NLA_U16 },
 375         [NDA_PORT]              = { .type = NLA_U16 },
 376         [NDA_VNI]               = { .type = NLA_U32 },
 377         [NDA_IFINDEX]           = { .type = NLA_U32 },
 378 };
 379
 380 static const NLTypeSystem rtnl_neigh_type_system = {
 381         .max = ELEMENTSOF(rtnl_neigh_types) - 1,
 382         .types = rtnl_neigh_types,
 383 };
 384
 385 static const NLType rtnl_types[RTM_MAX + 1] = {
 386         [NLMSG_ERROR]  = { .type = NLA_META, .size = sizeof(struct nlmsgerr) },
 387         [RTM_NEWLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 388         [RTM_DELLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 389         [RTM_GETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 390         [RTM_SETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 391         [RTM_NEWADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 392         [RTM_DELADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 393         [RTM_GETADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 394         [RTM_NEWROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 395         [RTM_DELROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 396         [RTM_GETROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 397         [RTM_NEWNEIGH] = { .type = NLA_NESTED, .type_system = &rtnl_neigh_type_system, .size = sizeof(struct ndmsg) },
 398         [RTM_DELNEIGH] = { .type = NLA_NESTED, .type_system = &rtnl_neigh_type_system, .size = sizeof(struct ndmsg) },
 399         [RTM_GETNEIGH] = { .type = NLA_NESTED, .type_system = &rtnl_neigh_type_system, .size = sizeof(struct ndmsg) },
 400 };
 401
 402 const NLTypeSystem rtnl_type_system = {
 403         .max = ELEMENTSOF(rtnl_types) - 1,
 404         .types = rtnl_types,
 405 };
 406
 407 int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type) {
 408         const NLType *nl_type;
 409
 410         assert(ret);
 411
 412         if (!type_system)
 413                 type_system = &rtnl_type_system;
 414
 415         assert(type_system->types);
 416
 417         if (type > type_system->max)
 418                 return -ENOTSUP;
 419
 420         nl_type = &type_system->types[type];
 421
 422         if (nl_type->type == NLA_UNSPEC)
 423                 return -ENOTSUP;
 424
 425         *ret = nl_type;
 426
 427         return 0;
 428 }
 429
 430 int type_system_get_type_system(const NLTypeSystem *type_system, const NLTypeSystem **ret, uint16_t type) {
 431         const NLType *nl_type;
 432         int r;
 433
 434         assert(ret);
 435
 436         r = type_system_get_type(type_system, &nl_type, type);
 437         if (r < 0)
 438                 return r;
 439
 440         assert_return(nl_type->type == NLA_NESTED, -EINVAL);
 441
 442         assert(nl_type->type_system);
 443
 444         *ret = nl_type->type_system;
 445
 446         return 0;
 447 }
 448
 449 int type_system_get_type_system_union(const NLTypeSystem *type_system, const NLTypeSystemUnion **ret, uint16_t type) {
 450         const NLType *nl_type;
 451         int r;
 452
 453         assert(ret);
 454
 455         r = type_system_get_type(type_system, &nl_type, type);
 456         if (r < 0)
 457                 return r;
 458
 459         assert_return(nl_type->type == NLA_UNION, -EINVAL);
 460
 461         assert(nl_type->type_system_union);
 462
 463         *ret = nl_type->type_system_union;
 464
 465         return 0;
 466 }
 467
 468 int type_system_union_get_type_system(const NLTypeSystemUnion *type_system_union, const NLTypeSystem **ret, const char *key) {
 469         int type;
 470
 471         assert(type_system_union);
 472         assert_return(type_system_union->match_type == NL_MATCH_SIBLING, -EINVAL);
 473         assert(type_system_union->lookup);
 474         assert(type_system_union->type_systems);
 475         assert(ret);
 476         assert(key);
 477
 478         type = type_system_union->lookup(key);
 479         if (type < 0)
 480                 return -ENOTSUP;
 481
 482         assert(type < type_system_union->num);
 483
 484         *ret = &type_system_union->type_systems[type];
 485
 486         return 0;
 487 }
 488
 489 int type_system_union_protocol_get_type_system(const NLTypeSystemUnion *type_system_union, const NLTypeSystem **ret, uint16_t protocol) {
 490         const NLTypeSystem *type_system;
 491
 492         assert(type_system_union);
 493         assert(type_system_union->type_systems);
 494         assert(ret);
 495         assert_return(type_system_union->match_type == NL_MATCH_PROTOCOL, -EINVAL);
 496         assert_return(protocol < type_system_union->num, -EINVAL);
 497
 498         if (protocol >= type_system_union->num)
 499                 return -ENOTSUP;
 500
 501         type_system = &type_system_union->type_systems[protocol];
 502
 503         if (!type_system)
 504                 return -ENOTSUP;
 505
 506         *ret = type_system;
 507
 508         return 0;
 509 }