1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __NET_VXLAN_H 3 #define __NET_VXLAN_H 1 4 5 #include <linux/if_vlan.h> 6 #include <linux/rhashtable-types.h> 7 #include <net/udp_tunnel.h> 8 #include <net/dst_metadata.h> 9 #include <net/rtnetlink.h> 10 #include <net/switchdev.h> 11 #include <net/nexthop.h> 12 13 #define IANA_VXLAN_UDP_PORT 4789 14 #define IANA_VXLAN_GPE_UDP_PORT 4790 15 16 /* VXLAN protocol (RFC 7348) header: 17 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 18 * |R|R|R|R|I|R|R|R| Reserved | 19 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 20 * | VXLAN Network Identifier (VNI) | Reserved | 21 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 22 * 23 * I = VXLAN Network Identifier (VNI) present. 24 */ 25 struct vxlanhdr { 26 __be32 vx_flags; 27 __be32 vx_vni; 28 }; 29 30 /* VXLAN header flags. */ 31 #define VXLAN_HF_VNI cpu_to_be32(BIT(27)) 32 33 #define VXLAN_N_VID (1u << 24) 34 #define VXLAN_VID_MASK (VXLAN_N_VID - 1) 35 #define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8) 36 #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) 37 38 #define VNI_HASH_BITS 10 39 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) 40 #define FDB_HASH_BITS 8 41 #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) 42 43 /* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X): 44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 45 * |R|R|R|R|I|R|R|R|R|R|C| Reserved | 46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 47 * | VXLAN Network Identifier (VNI) |O| Csum start | 48 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 49 * 50 * C = Remote checksum offload bit. When set indicates that the 51 * remote checksum offload data is present. 52 * 53 * O = Offset bit. Indicates the checksum offset relative to 54 * checksum start. 55 * 56 * Csum start = Checksum start divided by two. 57 * 58 * http://tools.ietf.org/html/draft-herbert-vxlan-rco 59 */ 60 61 /* VXLAN-RCO header flags. */ 62 #define VXLAN_HF_RCO cpu_to_be32(BIT(21)) 63 64 /* Remote checksum offload header option */ 65 #define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */ 66 #define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set *) */ 67 #define VXLAN_RCO_SHIFT 1 /* Left shift of start */ 68 #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) 69 #define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT) 70 71 /* 72 * VXLAN Group Based Policy Extension (VXLAN_F_GBP): 73 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 74 * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | 75 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 76 * | VXLAN Network Identifier (VNI) | Reserved | 77 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 78 * 79 * G = Group Policy ID present. 80 * 81 * D = Don't Learn bit. When set, this bit indicates that the egress 82 * VTEP MUST NOT learn the source address of the encapsulated frame. 83 * 84 * A = Indicates that the group policy has already been applied to 85 * this packet. Policies MUST NOT be applied by devices when the 86 * A bit is set. 87 * 88 * https://tools.ietf.org/html/draft-smith-vxlan-group-policy 89 */ 90 struct vxlanhdr_gbp { 91 u8 vx_flags; 92 #ifdef __LITTLE_ENDIAN_BITFIELD 93 u8 reserved_flags1:3, 94 policy_applied:1, 95 reserved_flags2:2, 96 dont_learn:1, 97 reserved_flags3:1; 98 #elif defined(__BIG_ENDIAN_BITFIELD) 99 u8 reserved_flags1:1, 100 dont_learn:1, 101 reserved_flags2:2, 102 policy_applied:1, 103 reserved_flags3:3; 104 #else 105 #error "Please fix <asm/byteorder.h>" 106 #endif 107 __be16 policy_id; 108 __be32 vx_vni; 109 }; 110 111 /* VXLAN-GBP header flags. */ 112 #define VXLAN_HF_GBP cpu_to_be32(BIT(31)) 113 114 #define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF)) 115 116 /* skb->mark mapping 117 * 118 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 119 * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | 120 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 121 */ 122 #define VXLAN_GBP_DONT_LEARN (BIT(6) << 16) 123 #define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16) 124 #define VXLAN_GBP_ID_MASK (0xFFFF) 125 126 #define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \ 127 VXLAN_GBP_ID_MASK) 128 129 /* 130 * VXLAN Generic Protocol Extension (VXLAN_F_GPE): 131 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 132 * |R|R|Ver|I|P|R|O| Reserved |Next Protocol | 133 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 134 * | VXLAN Network Identifier (VNI) | Reserved | 135 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 136 * 137 * Ver = Version. Indicates VXLAN GPE protocol version. 138 * 139 * P = Next Protocol Bit. The P bit is set to indicate that the 140 * Next Protocol field is present. 141 * 142 * O = OAM Flag Bit. The O bit is set to indicate that the packet 143 * is an OAM packet. 144 * 145 * Next Protocol = This 8 bit field indicates the protocol header 146 * immediately following the VXLAN GPE header. 147 * 148 * https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01 149 */ 150 151 struct vxlanhdr_gpe { 152 #if defined(__LITTLE_ENDIAN_BITFIELD) 153 u8 oam_flag:1, 154 reserved_flags1:1, 155 np_applied:1, 156 instance_applied:1, 157 version:2, 158 reserved_flags2:2; 159 #elif defined(__BIG_ENDIAN_BITFIELD) 160 u8 reserved_flags2:2, 161 version:2, 162 instance_applied:1, 163 np_applied:1, 164 reserved_flags1:1, 165 oam_flag:1; 166 #endif 167 u8 reserved_flags3; 168 u8 reserved_flags4; 169 u8 next_protocol; 170 __be32 vx_vni; 171 }; 172 173 /* VXLAN-GPE header flags. */ 174 #define VXLAN_HF_VER cpu_to_be32(BIT(29) | BIT(28)) 175 #define VXLAN_HF_NP cpu_to_be32(BIT(26)) 176 #define VXLAN_HF_OAM cpu_to_be32(BIT(24)) 177 178 #define VXLAN_GPE_USED_BITS (VXLAN_HF_VER | VXLAN_HF_NP | VXLAN_HF_OAM | \ 179 cpu_to_be32(0xff)) 180 181 struct vxlan_metadata { 182 u32 gbp; 183 }; 184 185 /* per UDP socket information */ 186 struct vxlan_sock { 187 struct hlist_node hlist; 188 struct sock *sk; 189 struct rcu_head rcu; 190 struct hlist_head vni_list[VNI_HASH_SIZE]; 191 refcount_t refcnt; 192 u32 flags; 193 }; 194 195 union vxlan_addr { 196 struct sockaddr_in sin; 197 struct sockaddr_in6 sin6; 198 struct sockaddr sa; 199 }; 200 201 struct vxlan_rdst { 202 union vxlan_addr remote_ip; 203 __be16 remote_port; 204 u8 offloaded:1; 205 __be32 remote_vni; 206 u32 remote_ifindex; 207 struct list_head list; 208 struct rcu_head rcu; 209 struct dst_cache dst_cache; 210 }; 211 212 struct vxlan_config { 213 union vxlan_addr remote_ip; 214 union vxlan_addr saddr; 215 __be32 vni; 216 int remote_ifindex; 217 int mtu; 218 __be16 dst_port; 219 u16 port_min; 220 u16 port_max; 221 u8 tos; 222 u8 ttl; 223 __be32 label; 224 enum ifla_vxlan_label_policy label_policy; 225 u32 flags; 226 unsigned long age_interval; 227 unsigned int addrmax; 228 bool no_share; 229 enum ifla_vxlan_df df; 230 struct vxlanhdr reserved_bits; 231 struct rcu_head rcu; 232 }; 233 234 enum { 235 VXLAN_VNI_STATS_RX, 236 VXLAN_VNI_STATS_RX_DROPS, 237 VXLAN_VNI_STATS_RX_ERRORS, 238 VXLAN_VNI_STATS_TX, 239 VXLAN_VNI_STATS_TX_DROPS, 240 VXLAN_VNI_STATS_TX_ERRORS, 241 }; 242 243 struct vxlan_vni_stats { 244 u64 rx_packets; 245 u64 rx_bytes; 246 u64 rx_drops; 247 u64 rx_errors; 248 u64 tx_packets; 249 u64 tx_bytes; 250 u64 tx_drops; 251 u64 tx_errors; 252 }; 253 254 struct vxlan_vni_stats_pcpu { 255 struct vxlan_vni_stats stats; 256 struct u64_stats_sync syncp; 257 }; 258 259 struct vxlan_dev_node { 260 struct hlist_node hlist; 261 struct vxlan_dev *vxlan; 262 }; 263 264 struct vxlan_vni_node { 265 struct rhash_head vnode; 266 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ 267 #if IS_ENABLED(CONFIG_IPV6) 268 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ 269 #endif 270 struct list_head vlist; 271 __be32 vni; 272 union vxlan_addr remote_ip; /* default remote ip for this vni */ 273 struct vxlan_vni_stats_pcpu __percpu *stats; 274 275 struct rcu_head rcu; 276 }; 277 278 struct vxlan_vni_group { 279 struct rhashtable vni_hash; 280 struct list_head vni_list; 281 u32 num_vnis; 282 }; 283 284 /* Pseudo network device */ 285 struct vxlan_dev { 286 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ 287 #if IS_ENABLED(CONFIG_IPV6) 288 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ 289 #endif 290 struct list_head next; /* vxlan's per namespace list */ 291 struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ 292 #if IS_ENABLED(CONFIG_IPV6) 293 struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ 294 #endif 295 struct net_device *dev; 296 struct net *net; /* netns for packet i/o */ 297 struct net_device *lowerdev; 298 299 struct timer_list age_timer; 300 spinlock_t hash_lock; 301 unsigned int addrcnt; 302 struct gro_cells gro_cells; 303 unsigned long flags; 304 305 struct vxlan_config __rcu *cfg; 306 307 struct vxlan_vni_group __rcu *vnigrp; 308 309 struct rhashtable fdb_hash_tbl; 310 311 struct rhashtable mdb_tbl; 312 struct hlist_head fdb_list; 313 struct hlist_head mdb_list; 314 unsigned int mdb_seq; 315 }; 316 317 enum vxlan_dev_flags { 318 VXLAN_DEV_F_MDB, 319 }; 320 321 #define VXLAN_F_LEARN 0x01 322 #define VXLAN_F_PROXY 0x02 323 #define VXLAN_F_RSC 0x04 324 #define VXLAN_F_L2MISS 0x08 325 #define VXLAN_F_L3MISS 0x10 326 #define VXLAN_F_IPV6 0x20 327 #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 328 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 329 #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 330 #define VXLAN_F_REMCSUM_TX 0x200 331 #define VXLAN_F_REMCSUM_RX 0x400 332 #define VXLAN_F_GBP 0x800 333 #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 334 #define VXLAN_F_COLLECT_METADATA 0x2000 335 #define VXLAN_F_GPE 0x4000 336 #define VXLAN_F_IPV6_LINKLOCAL 0x8000 337 #define VXLAN_F_TTL_INHERIT 0x10000 338 #define VXLAN_F_VNIFILTER 0x20000 339 #define VXLAN_F_LOCALBYPASS 0x80000 340 #define VXLAN_F_MC_ROUTE 0x100000 341 342 /* Flags that are used in the receive path. These flags must match in 343 * order for a socket to be shareable 344 */ 345 #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ 346 VXLAN_F_GPE | \ 347 VXLAN_F_UDP_ZERO_CSUM6_RX | \ 348 VXLAN_F_REMCSUM_RX | \ 349 VXLAN_F_REMCSUM_NOPARTIAL | \ 350 VXLAN_F_COLLECT_METADATA | \ 351 VXLAN_F_VNIFILTER) 352 353 /* Flags that can be set together with VXLAN_F_GPE. */ 354 #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ 355 VXLAN_F_IPV6 | \ 356 VXLAN_F_IPV6_LINKLOCAL | \ 357 VXLAN_F_UDP_ZERO_CSUM_TX | \ 358 VXLAN_F_UDP_ZERO_CSUM6_TX | \ 359 VXLAN_F_UDP_ZERO_CSUM6_RX | \ 360 VXLAN_F_COLLECT_METADATA | \ 361 VXLAN_F_VNIFILTER | \ 362 VXLAN_F_LOCALBYPASS | \ 363 VXLAN_F_MC_ROUTE | \ 364 0) 365 366 static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, 367 netdev_features_t features) 368 { 369 u8 l4_hdr = 0; 370 371 if (!skb->encapsulation) 372 return features; 373 374 switch (vlan_get_protocol(skb)) { 375 case htons(ETH_P_IP): 376 l4_hdr = ip_hdr(skb)->protocol; 377 break; 378 case htons(ETH_P_IPV6): 379 l4_hdr = ipv6_hdr(skb)->nexthdr; 380 break; 381 default: 382 return features; 383 } 384 385 if ((l4_hdr == IPPROTO_UDP) && 386 (skb->inner_protocol_type != ENCAP_TYPE_ETHER || 387 skb->inner_protocol != htons(ETH_P_TEB) || 388 (skb_inner_mac_header(skb) - skb_transport_header(skb) != 389 sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || 390 (skb->ip_summed != CHECKSUM_NONE && 391 !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto)))) 392 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 393 394 return features; 395 } 396 397 static inline int vxlan_headroom(u32 flags) 398 { 399 /* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */ 400 /* VXLAN-GPE: IP4/6 header + UDP + VXLAN */ 401 return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) : 402 sizeof(struct iphdr)) + 403 sizeof(struct udphdr) + sizeof(struct vxlanhdr) + 404 (flags & VXLAN_F_GPE ? 0 : ETH_HLEN); 405 } 406 407 static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) 408 { 409 return (struct vxlanhdr *)(udp_hdr(skb) + 1); 410 } 411 412 static inline __be32 vxlan_vni(__be32 vni_field) 413 { 414 #if defined(__BIG_ENDIAN) 415 return (__force __be32)((__force u32)vni_field >> 8); 416 #else 417 return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); 418 #endif 419 } 420 421 static inline __be32 vxlan_vni_field(__be32 vni) 422 { 423 #if defined(__BIG_ENDIAN) 424 return (__force __be32)((__force u32)vni << 8); 425 #else 426 return (__force __be32)((__force u32)vni >> 8); 427 #endif 428 } 429 430 static inline size_t vxlan_rco_start(__be32 vni_field) 431 { 432 return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; 433 } 434 435 static inline size_t vxlan_rco_offset(__be32 vni_field) 436 { 437 return (vni_field & VXLAN_RCO_UDP) ? 438 offsetof(struct udphdr, check) : 439 offsetof(struct tcphdr, check); 440 } 441 442 static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) 443 { 444 __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); 445 446 if (offset == offsetof(struct udphdr, check)) 447 vni_field |= VXLAN_RCO_UDP; 448 return vni_field; 449 } 450 451 static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) 452 { 453 return vs->sk->sk_family; 454 } 455 456 #if IS_ENABLED(CONFIG_IPV6) 457 458 static inline bool vxlan_addr_any(const union vxlan_addr *ipa) 459 { 460 if (ipa->sa.sa_family == AF_INET6) 461 return ipv6_addr_any(&ipa->sin6.sin6_addr); 462 else 463 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); 464 } 465 466 static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) 467 { 468 if (ipa->sa.sa_family == AF_INET6) 469 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); 470 else 471 return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); 472 } 473 474 #else /* !IS_ENABLED(CONFIG_IPV6) */ 475 476 static inline bool vxlan_addr_any(const union vxlan_addr *ipa) 477 { 478 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); 479 } 480 481 static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) 482 { 483 return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); 484 } 485 486 #endif /* IS_ENABLED(CONFIG_IPV6) */ 487 488 static inline bool netif_is_vxlan(const struct net_device *dev) 489 { 490 return dev->rtnl_link_ops && 491 !strcmp(dev->rtnl_link_ops->kind, "vxlan"); 492 } 493 494 struct switchdev_notifier_vxlan_fdb_info { 495 struct switchdev_notifier_info info; /* must be first */ 496 union vxlan_addr remote_ip; 497 __be16 remote_port; 498 __be32 remote_vni; 499 u32 remote_ifindex; 500 u8 eth_addr[ETH_ALEN]; 501 __be32 vni; 502 bool offloaded; 503 bool added_by_user; 504 }; 505 506 #if IS_ENABLED(CONFIG_VXLAN) 507 int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 508 struct switchdev_notifier_vxlan_fdb_info *fdb_info); 509 int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, 510 struct notifier_block *nb, 511 struct netlink_ext_ack *extack); 512 void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni); 513 514 #else 515 static inline int 516 vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 517 struct switchdev_notifier_vxlan_fdb_info *fdb_info) 518 { 519 return -ENOENT; 520 } 521 522 static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, 523 struct notifier_block *nb, 524 struct netlink_ext_ack *extack) 525 { 526 return -EOPNOTSUPP; 527 } 528 529 static inline void 530 vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) 531 { 532 } 533 #endif 534 535 static inline void vxlan_flag_attr_error(int attrtype, 536 struct netlink_ext_ack *extack) 537 { 538 #define VXLAN_FLAG(flg) \ 539 case IFLA_VXLAN_##flg: \ 540 NL_SET_ERR_MSG_MOD(extack, \ 541 "cannot change " #flg " flag"); \ 542 break 543 switch (attrtype) { 544 VXLAN_FLAG(TTL_INHERIT); 545 VXLAN_FLAG(LEARNING); 546 VXLAN_FLAG(PROXY); 547 VXLAN_FLAG(RSC); 548 VXLAN_FLAG(L2MISS); 549 VXLAN_FLAG(L3MISS); 550 VXLAN_FLAG(COLLECT_METADATA); 551 VXLAN_FLAG(UDP_ZERO_CSUM6_TX); 552 VXLAN_FLAG(UDP_ZERO_CSUM6_RX); 553 VXLAN_FLAG(REMCSUM_TX); 554 VXLAN_FLAG(REMCSUM_RX); 555 VXLAN_FLAG(GBP); 556 VXLAN_FLAG(GPE); 557 VXLAN_FLAG(REMCSUM_NOPARTIAL); 558 default: 559 NL_SET_ERR_MSG_MOD(extack, \ 560 "cannot change flag"); 561 break; 562 } 563 #undef VXLAN_FLAG 564 } 565 566 static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh, 567 u32 hash, 568 struct vxlan_rdst *rdst) 569 { 570 struct fib_nh_common *nhc; 571 __be16 dst_port = 0; 572 573 nhc = nexthop_path_fdb_result(nh, hash >> 1, &dst_port); 574 if (unlikely(!nhc)) 575 return false; 576 577 switch (nhc->nhc_gw_family) { 578 case AF_INET: 579 rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4; 580 rdst->remote_ip.sa.sa_family = AF_INET; 581 break; 582 case AF_INET6: 583 rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6; 584 rdst->remote_ip.sa.sa_family = AF_INET6; 585 break; 586 } 587 588 rdst->remote_port = dst_port; 589 590 return true; 591 } 592 593 static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md) 594 { 595 struct vxlanhdr_gbp *gbp; 596 597 if (!md->gbp) 598 return; 599 600 gbp = (struct vxlanhdr_gbp *)vxh; 601 vxh->vx_flags |= VXLAN_HF_GBP; 602 603 if (md->gbp & VXLAN_GBP_DONT_LEARN) 604 gbp->dont_learn = 1; 605 606 if (md->gbp & VXLAN_GBP_POLICY_APPLIED) 607 gbp->policy_applied = 1; 608 609 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); 610 } 611 612 #endif 613