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         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  94         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  95         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  96         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  97         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
  98         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
  99         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
 100         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
 101         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
 102         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
 103         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
 104         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
 105         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
 106         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 107         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 108         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 109         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 110         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 111         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 112         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 113         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 114 };
 115
 116 static const NLType rtnl_link_info_data_iptun_types[IFLA_IPTUN_MAX + 1] = {
 117         [IFLA_IPTUN_LINK]                = { .type = NLA_U32 },
 118         [IFLA_IPTUN_LOCAL]               = { .type = NLA_IN_ADDR },
 119         [IFLA_IPTUN_REMOTE]              = { .type = NLA_IN_ADDR },
 120         [IFLA_IPTUN_TTL]                 = { .type = NLA_U8 },
 121         [IFLA_IPTUN_TOS]                 = { .type = NLA_U8 },
 122         [IFLA_IPTUN_PMTUDISC]            = { .type = NLA_U8 },
 123         [IFLA_IPTUN_FLAGS]               = { .type = NLA_U16 },
 124         [IFLA_IPTUN_PROTO]               = { .type = NLA_U8 },
 125         [IFLA_IPTUN_6RD_PREFIX]          = { .type = NLA_IN_ADDR },
 126         [IFLA_IPTUN_6RD_RELAY_PREFIX]    = { .type = NLA_U32 },
 127         [IFLA_IPTUN_6RD_PREFIXLEN]       = { .type = NLA_U16 },
 128         [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 },
 129 };
 130
 131 static  const NLType rtnl_link_info_data_ipgre_types[IFLA_GRE_MAX + 1] = {
 132         [IFLA_GRE_LINK]     = { .type = NLA_U32 },
 133         [IFLA_GRE_IFLAGS]   = { .type = NLA_U16 },
 134         [IFLA_GRE_OFLAGS]   = { .type = NLA_U16 },
 135         [IFLA_GRE_IKEY]     = { .type = NLA_U32 },
 136         [IFLA_GRE_OKEY]     = { .type = NLA_U32 },
 137         [IFLA_GRE_LOCAL]    = { .type = NLA_IN_ADDR },
 138         [IFLA_GRE_REMOTE]   = { .type = NLA_IN_ADDR },
 139         [IFLA_GRE_TTL]      = { .type = NLA_U8 },
 140         [IFLA_GRE_TOS]      = { .type = NLA_U8 },
 141         [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
 142 };
 143
 144 static const NLType rtnl_link_info_data_ipvti_types[IFLA_VTI_MAX + 1] = {
 145         [IFLA_VTI_LINK]         = { .type = NLA_U32 },
 146         [IFLA_VTI_IKEY]         = { .type = NLA_U32 },
 147         [IFLA_VTI_OKEY]         = { .type = NLA_U32 },
 148         [IFLA_VTI_LOCAL]        = { .type = NLA_IN_ADDR  },
 149         [IFLA_VTI_REMOTE]       = { .type = NLA_IN_ADDR  },
 150 };
 151
 152 /* these strings must match the .kind entries in the kernel */
 153 static const char* const nl_union_link_info_data_table[_NL_UNION_LINK_INFO_DATA_MAX] = {
 154         [NL_UNION_LINK_INFO_DATA_BOND] = "bond",
 155         [NL_UNION_LINK_INFO_DATA_BRIDGE] = "bridge",
 156         [NL_UNION_LINK_INFO_DATA_VLAN] = "vlan",
 157         [NL_UNION_LINK_INFO_DATA_VETH] = "veth",
 158         [NL_UNION_LINK_INFO_DATA_DUMMY] = "dummy",
 159         [NL_UNION_LINK_INFO_DATA_MACVLAN] = "macvlan",
 160         [NL_UNION_LINK_INFO_DATA_VXLAN] = "vxlan",
 161         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = "ipip",
 162         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = "gre",
 163         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] = "sit",
 164         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] = "vti",
 165 };
 166
 167 DEFINE_STRING_TABLE_LOOKUP(nl_union_link_info_data, NLUnionLinkInfoData);
 168
 169 static const NLTypeSystem rtnl_link_info_data_type_systems[_NL_UNION_LINK_INFO_DATA_MAX] = {
 170         [NL_UNION_LINK_INFO_DATA_BOND] =        { .max = ELEMENTSOF(rtnl_link_info_data_bond_types) - 1,
 171                                                   .types = rtnl_link_info_data_bond_types },
 172         [NL_UNION_LINK_INFO_DATA_BRIDGE] =      { .max = ELEMENTSOF(rtnl_link_info_data_bridge_types) - 1,
 173                                                   .types = rtnl_link_info_data_bridge_types },
 174         [NL_UNION_LINK_INFO_DATA_VLAN] =        { .max = ELEMENTSOF(rtnl_link_info_data_vlan_types) - 1,
 175                                                   .types = rtnl_link_info_data_vlan_types },
 176         [NL_UNION_LINK_INFO_DATA_VETH] =        { .max = ELEMENTSOF(rtnl_link_info_data_veth_types) - 1,
 177                                                   .types = rtnl_link_info_data_veth_types },
 178         [NL_UNION_LINK_INFO_DATA_MACVLAN] =     { .max = ELEMENTSOF(rtnl_link_info_data_macvlan_types) - 1,
 179                                                   .types = rtnl_link_info_data_macvlan_types },
 180         [NL_UNION_LINK_INFO_DATA_VXLAN] =       { .max = ELEMENTSOF(rtnl_link_info_data_vxlan_types) - 1,
 181                                                   .types = rtnl_link_info_data_vxlan_types },
 182         [NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 183                                                   .types = rtnl_link_info_data_iptun_types },
 184         [NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
 185                                                     .types = rtnl_link_info_data_ipgre_types },
 186         [NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
 187                                                   .types = rtnl_link_info_data_iptun_types },
 188         [NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] =  { .max = ELEMENTSOF(rtnl_link_info_data_ipvti_types) - 1,
 189                                                   .types = rtnl_link_info_data_ipvti_types },
 190 };
 191
 192 static const NLTypeSystemUnion rtnl_link_info_data_type_system_union = {
 193         .num = _NL_UNION_LINK_INFO_DATA_MAX,
 194         .lookup = nl_union_link_info_data_from_string,
 195         .type_systems = rtnl_link_info_data_type_systems,
 196         .match = IFLA_INFO_KIND,
 197 };
 198
 199 static const NLType rtnl_link_info_types[IFLA_INFO_MAX + 1] = {
 200         [IFLA_INFO_KIND]        = { .type = NLA_STRING },
 201         [IFLA_INFO_DATA]        = { .type = NLA_UNION, .type_system_union = &rtnl_link_info_data_type_system_union},
 202 /*
 203         [IFLA_INFO_XSTATS],
 204         [IFLA_INFO_SLAVE_KIND]  = { .type = NLA_STRING },
 205         [IFLA_INFO_SLAVE_DATA]  = { .type = NLA_NESTED },
 206 */
 207 };
 208
 209 static const NLTypeSystem rtnl_link_info_type_system = {
 210         .max = ELEMENTSOF(rtnl_link_info_types) - 1,
 211         .types = rtnl_link_info_types,
 212 };
 213
 214 static const NLType rtnl_link_types[IFLA_MAX + 1] = {
 215         [IFLA_ADDRESS]          = { .type = NLA_ETHER_ADDR, },
 216         [IFLA_BROADCAST]        = { .type = NLA_ETHER_ADDR, },
 217         [IFLA_IFNAME]           = { .type = NLA_STRING, .size = IFNAMSIZ - 1, },
 218         [IFLA_MTU]              = { .type = NLA_U32 },
 219         [IFLA_LINK]             = { .type = NLA_U32 },
 220 /*
 221         [IFLA_QDISC],
 222         [IFLA_STATS],
 223         [IFLA_COST],
 224         [IFLA_PRIORITY],
 225 */
 226         [IFLA_MASTER]           = { .type = NLA_U32 },
 227 /*
 228         [IFLA_WIRELESS],
 229         [IFLA_PROTINFO],
 230 */
 231         [IFLA_TXQLEN]           = { .type = NLA_U32 },
 232 /*
 233         [IFLA_MAP]              = { .len = sizeof(struct rtnl_link_ifmap) },
 234 */
 235         [IFLA_WEIGHT]           = { .type = NLA_U32 },
 236         [IFLA_OPERSTATE]        = { .type = NLA_U8 },
 237         [IFLA_LINKMODE]         = { .type = NLA_U8 },
 238         [IFLA_LINKINFO]         = { .type = NLA_NESTED, .type_system = &rtnl_link_info_type_system },
 239         [IFLA_NET_NS_PID]       = { .type = NLA_U32 },
 240         [IFLA_IFALIAS]          = { .type = NLA_STRING, .size = IFALIASZ - 1 },
 241 /*
 242         [IFLA_NUM_VF],
 243         [IFLA_VFINFO_LIST]      = {. type = NLA_NESTED, },
 244         [IFLA_STATS64],
 245         [IFLA_VF_PORTS]         = { .type = NLA_NESTED },
 246         [IFLA_PORT_SELF]        = { .type = NLA_NESTED },
 247         [IFLA_AF_SPEC]          = { .type = NLA_NESTED },
 248         [IFLA_VF_PORTS],
 249         [IFLA_PORT_SELF],
 250         [IFLA_AF_SPEC],
 251 */
 252         [IFLA_GROUP]            = { .type = NLA_U32 },
 253         [IFLA_NET_NS_FD]        = { .type = NLA_U32 },
 254         [IFLA_EXT_MASK]         = { .type = NLA_U32 },
 255         [IFLA_PROMISCUITY]      = { .type = NLA_U32 },
 256         [IFLA_NUM_TX_QUEUES]    = { .type = NLA_U32 },
 257         [IFLA_NUM_RX_QUEUES]    = { .type = NLA_U32 },
 258         [IFLA_CARRIER]          = { .type = NLA_U8 },
 259 /*
 260         [IFLA_PHYS_PORT_ID]     = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
 261 */
 262 };
 263
 264 static const NLTypeSystem rtnl_link_type_system = {
 265         .max = ELEMENTSOF(rtnl_link_types) - 1,
 266         .types = rtnl_link_types,
 267 };
 268
 269 static const NLType rtnl_address_types[IFA_MAX + 1] = {
 270         [IFA_ADDRESS]           = { .type = NLA_IN_ADDR },
 271         [IFA_LOCAL]             = { .type = NLA_IN_ADDR },
 272         [IFA_LABEL]             = { .type = NLA_STRING, .size = IFNAMSIZ - 1 },
 273         [IFA_BROADCAST]         = { .type = NLA_IN_ADDR }, /* 6? */
 274         [IFA_CACHEINFO]         = { .type = NLA_CACHE_INFO, .size = sizeof(struct ifa_cacheinfo) },
 275 /*
 276         [IFA_ANYCAST],
 277         [IFA_MULTICAST],
 278 */
 279 #ifdef IFA_FLAGS
 280         [IFA_FLAGS]             = { .type = NLA_U32 },
 281 #endif
 282 };
 283
 284 static const NLTypeSystem rtnl_address_type_system = {
 285         .max = ELEMENTSOF(rtnl_address_types) - 1,
 286         .types = rtnl_address_types,
 287 };
 288
 289 static const NLType rtnl_route_types[RTA_MAX + 1] = {
 290         [RTA_DST]               = { .type = NLA_IN_ADDR }, /* 6? */
 291         [RTA_SRC]               = { .type = NLA_IN_ADDR }, /* 6? */
 292         [RTA_IIF]               = { .type = NLA_U32 },
 293         [RTA_OIF]               = { .type = NLA_U32 },
 294         [RTA_GATEWAY]           = { .type = NLA_IN_ADDR },
 295         [RTA_PRIORITY]          = { .type = NLA_U32 },
 296         [RTA_PREFSRC]           = { .type = NLA_IN_ADDR }, /* 6? */
 297 /*
 298         [RTA_METRICS]           = { .type = NLA_NESTED },
 299         [RTA_MULTIPATH]         = { .len = sizeof(struct rtnexthop) },
 300 */
 301         [RTA_FLOW]              = { .type = NLA_U32 }, /* 6? */
 302 /*
 303         RTA_CACHEINFO,
 304         RTA_TABLE,
 305         RTA_MARK,
 306         RTA_MFC_STATS,
 307 */
 308 };
 309
 310 static const NLTypeSystem rtnl_route_type_system = {
 311         .max = ELEMENTSOF(rtnl_route_types) - 1,
 312         .types = rtnl_route_types,
 313 };
 314
 315 static const NLType rtnl_types[RTM_MAX + 1] = {
 316         [NLMSG_ERROR]  = { .type = NLA_META, .size = sizeof(struct nlmsgerr) },
 317         [RTM_NEWLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 318         [RTM_DELLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 319         [RTM_GETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 320         [RTM_SETLINK]  = { .type = NLA_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
 321         [RTM_NEWADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 322         [RTM_DELADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 323         [RTM_GETADDR]  = { .type = NLA_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
 324         [RTM_NEWROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 325         [RTM_DELROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 326         [RTM_GETROUTE] = { .type = NLA_NESTED, .type_system = &rtnl_route_type_system, .size = sizeof(struct rtmsg) },
 327 };
 328
 329 const NLTypeSystem rtnl_type_system = {
 330         .max = ELEMENTSOF(rtnl_types) - 1,
 331         .types = rtnl_types,
 332 };
 333
 334 int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type) {
 335         const NLType *nl_type;
 336
 337         assert(ret);
 338
 339         if (!type_system)
 340                 type_system = &rtnl_type_system;
 341
 342         assert(type_system->types);
 343
 344         if (type > type_system->max)
 345                 return -ENOTSUP;
 346
 347         nl_type = &type_system->types[type];
 348
 349         if (nl_type->type == NLA_UNSPEC)
 350                 return -ENOTSUP;
 351
 352         *ret = nl_type;
 353
 354         return 0;
 355 }
 356
 357 int type_system_get_type_system(const NLTypeSystem *type_system, const NLTypeSystem **ret, uint16_t type) {
 358         const NLType *nl_type;
 359         int r;
 360
 361         assert(ret);
 362
 363         r = type_system_get_type(type_system, &nl_type, type);
 364         if (r < 0)
 365                 return r;
 366
 367         assert_return(nl_type->type == NLA_NESTED, -EINVAL);
 368
 369         assert(nl_type->type_system);
 370
 371         *ret = nl_type->type_system;
 372
 373         return 0;
 374 }
 375
 376 int type_system_get_type_system_union(const NLTypeSystem *type_system, const NLTypeSystemUnion **ret, uint16_t type) {
 377         const NLType *nl_type;
 378         int r;
 379
 380         assert(ret);
 381
 382         r = type_system_get_type(type_system, &nl_type, type);
 383         if (r < 0)
 384                 return r;
 385
 386         assert_return(nl_type->type == NLA_UNION, -EINVAL);
 387
 388         assert(nl_type->type_system_union);
 389
 390         *ret = nl_type->type_system_union;
 391
 392         return 0;
 393 }
 394
 395 int type_system_union_get_type_system(const NLTypeSystemUnion *type_system_union, const NLTypeSystem **ret, const char *key) {
 396         int type;
 397
 398         assert(type_system_union);
 399         assert(type_system_union->lookup);
 400         assert(type_system_union->type_systems);
 401         assert(ret);
 402         assert(key);
 403
 404         type = type_system_union->lookup(key);
 405         if (type < 0)
 406                 return -ENOTSUP;
 407
 408         assert(type < type_system_union->num);
 409
 410         *ret = &type_system_union->type_systems[type];
 411
 412         return 0;
 413 }