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 net_device *remote_dev; 208 struct list_head list; 209 struct rcu_head rcu; 210 struct dst_cache dst_cache; 211 }; 212 213 struct vxlan_config { 214 union vxlan_addr remote_ip; 215 union vxlan_addr saddr; 216 __be32 vni; 217 int remote_ifindex; 218 int mtu; 219 __be16 dst_port; 220 u16 port_min; 221 u16 port_max; 222 u8 tos; 223 u8 ttl; 224 __be32 label; 225 enum ifla_vxlan_label_policy label_policy; 226 u32 flags; 227 unsigned long age_interval; 228 unsigned int addrmax; 229 bool no_share; 230 enum ifla_vxlan_df df; 231 struct vxlanhdr reserved_bits; 232 struct rcu_head rcu; 233 }; 234 235 enum { 236 VXLAN_VNI_STATS_RX, 237 VXLAN_VNI_STATS_RX_DROPS, 238 VXLAN_VNI_STATS_RX_ERRORS, 239 VXLAN_VNI_STATS_TX, 240 VXLAN_VNI_STATS_TX_DROPS, 241 VXLAN_VNI_STATS_TX_ERRORS, 242 }; 243 244 struct vxlan_vni_stats { 245 u64 rx_packets; 246 u64 rx_bytes; 247 u64 rx_drops; 248 u64 rx_errors; 249 u64 tx_packets; 250 u64 tx_bytes; 251 u64 tx_drops; 252 u64 tx_errors; 253 }; 254 255 struct vxlan_vni_stats_pcpu { 256 struct vxlan_vni_stats stats; 257 struct u64_stats_sync syncp; 258 }; 259 260 struct vxlan_dev_node { 261 struct hlist_node hlist; 262 struct vxlan_dev *vxlan; 263 }; 264 265 struct vxlan_vni_node { 266 struct rhash_head vnode; 267 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ 268 #if IS_ENABLED(CONFIG_IPV6) 269 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ 270 #endif 271 struct list_head vlist; 272 __be32 vni; 273 union vxlan_addr remote_ip; /* default remote ip for this vni */ 274 struct vxlan_vni_stats_pcpu __percpu *stats; 275 276 struct rcu_head rcu; 277 }; 278 279 struct vxlan_vni_group { 280 struct rhashtable vni_hash; 281 struct list_head vni_list; 282 u32 num_vnis; 283 }; 284 285 /* Pseudo network device */ 286 struct vxlan_dev { 287 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ 288 #if IS_ENABLED(CONFIG_IPV6) 289 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ 290 #endif 291 struct list_head next; /* vxlan's per namespace list */ 292 struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ 293 #if IS_ENABLED(CONFIG_IPV6) 294 struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ 295 #endif 296 struct net_device *dev; 297 struct net *net; /* netns for packet i/o */ 298 struct vxlan_rdst default_dst; /* default destination */ 299 300 struct timer_list age_timer; 301 spinlock_t hash_lock; 302 unsigned int addrcnt; 303 struct gro_cells gro_cells; 304 unsigned long flags; 305 306 struct vxlan_config __rcu *cfg; 307 308 struct vxlan_vni_group __rcu *vnigrp; 309 310 struct rhashtable fdb_hash_tbl; 311 312 struct rhashtable mdb_tbl; 313 struct hlist_head fdb_list; 314 struct hlist_head mdb_list; 315 unsigned int mdb_seq; 316 }; 317 318 enum vxlan_dev_flags { 319 VXLAN_DEV_F_MDB, 320 }; 321 322 #define VXLAN_F_LEARN 0x01 323 #define VXLAN_F_PROXY 0x02 324 #define VXLAN_F_RSC 0x04 325 #define VXLAN_F_L2MISS 0x08 326 #define VXLAN_F_L3MISS 0x10 327 #define VXLAN_F_IPV6 0x20 328 #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 329 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 330 #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 331 #define VXLAN_F_REMCSUM_TX 0x200 332 #define VXLAN_F_REMCSUM_RX 0x400 333 #define VXLAN_F_GBP 0x800 334 #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 335 #define VXLAN_F_COLLECT_METADATA 0x2000 336 #define VXLAN_F_GPE 0x4000 337 #define VXLAN_F_IPV6_LINKLOCAL 0x8000 338 #define VXLAN_F_TTL_INHERIT 0x10000 339 #define VXLAN_F_VNIFILTER 0x20000 340 #define VXLAN_F_LOCALBYPASS 0x80000 341 #define VXLAN_F_MC_ROUTE 0x100000 342 343 /* Flags that are used in the receive path. These flags must match in 344 * order for a socket to be shareable 345 */ 346 #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ 347 VXLAN_F_GPE | \ 348 VXLAN_F_UDP_ZERO_CSUM6_RX | \ 349 VXLAN_F_REMCSUM_RX | \ 350 VXLAN_F_REMCSUM_NOPARTIAL | \ 351 VXLAN_F_COLLECT_METADATA | \ 352 VXLAN_F_VNIFILTER) 353 354 /* Flags that can be set together with VXLAN_F_GPE. */ 355 #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ 356 VXLAN_F_IPV6 | \ 357 VXLAN_F_IPV6_LINKLOCAL | \ 358 VXLAN_F_UDP_ZERO_CSUM_TX | \ 359 VXLAN_F_UDP_ZERO_CSUM6_TX | \ 360 VXLAN_F_UDP_ZERO_CSUM6_RX | \ 361 VXLAN_F_COLLECT_METADATA | \ 362 VXLAN_F_VNIFILTER | \ 363 VXLAN_F_LOCALBYPASS | \ 364 VXLAN_F_MC_ROUTE | \ 365 0) 366 367 static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, 368 netdev_features_t features) 369 { 370 u8 l4_hdr = 0; 371 372 if (!skb->encapsulation) 373 return features; 374 375 switch (vlan_get_protocol(skb)) { 376 case htons(ETH_P_IP): 377 l4_hdr = ip_hdr(skb)->protocol; 378 break; 379 case htons(ETH_P_IPV6): 380 l4_hdr = ipv6_hdr(skb)->nexthdr; 381 break; 382 default: 383 return features; 384 } 385 386 if ((l4_hdr == IPPROTO_UDP) && 387 (skb->inner_protocol_type != ENCAP_TYPE_ETHER || 388 skb->inner_protocol != htons(ETH_P_TEB) || 389 (skb_inner_mac_header(skb) - skb_transport_header(skb) != 390 sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || 391 (skb->ip_summed != CHECKSUM_NONE && 392 !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto)))) 393 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 394 395 return features; 396 } 397 398 static inline int vxlan_headroom(u32 flags) 399 { 400 /* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */ 401 /* VXLAN-GPE: IP4/6 header + UDP + VXLAN */ 402 return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) : 403 sizeof(struct iphdr)) + 404 sizeof(struct udphdr) + sizeof(struct vxlanhdr) + 405 (flags & VXLAN_F_GPE ? 0 : ETH_HLEN); 406 } 407 408 static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) 409 { 410 return (struct vxlanhdr *)(udp_hdr(skb) + 1); 411 } 412 413 static inline __be32 vxlan_vni(__be32 vni_field) 414 { 415 #if defined(__BIG_ENDIAN) 416 return (__force __be32)((__force u32)vni_field >> 8); 417 #else 418 return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); 419 #endif 420 } 421 422 static inline __be32 vxlan_vni_field(__be32 vni) 423 { 424 #if defined(__BIG_ENDIAN) 425 return (__force __be32)((__force u32)vni << 8); 426 #else 427 return (__force __be32)((__force u32)vni >> 8); 428 #endif 429 } 430 431 static inline size_t vxlan_rco_start(__be32 vni_field) 432 { 433 return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; 434 } 435 436 static inline size_t vxlan_rco_offset(__be32 vni_field) 437 { 438 return (vni_field & VXLAN_RCO_UDP) ? 439 offsetof(struct udphdr, check) : 440 offsetof(struct tcphdr, check); 441 } 442 443 static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) 444 { 445 __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); 446 447 if (offset == offsetof(struct udphdr, check)) 448 vni_field |= VXLAN_RCO_UDP; 449 return vni_field; 450 } 451 452 static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) 453 { 454 return vs->sk->sk_family; 455 } 456 457 #if IS_ENABLED(CONFIG_IPV6) 458 459 static inline bool vxlan_addr_any(const union vxlan_addr *ipa) 460 { 461 if (ipa->sa.sa_family == AF_INET6) 462 return ipv6_addr_any(&ipa->sin6.sin6_addr); 463 else 464 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); 465 } 466 467 static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) 468 { 469 if (ipa->sa.sa_family == AF_INET6) 470 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); 471 else 472 return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); 473 } 474 475 #else /* !IS_ENABLED(CONFIG_IPV6) */ 476 477 static inline bool vxlan_addr_any(const union vxlan_addr *ipa) 478 { 479 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); 480 } 481 482 static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) 483 { 484 return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); 485 } 486 487 #endif /* IS_ENABLED(CONFIG_IPV6) */ 488 489 static inline bool netif_is_vxlan(const struct net_device *dev) 490 { 491 return dev->rtnl_link_ops && 492 !strcmp(dev->rtnl_link_ops->kind, "vxlan"); 493 } 494 495 struct switchdev_notifier_vxlan_fdb_info { 496 struct switchdev_notifier_info info; /* must be first */ 497 union vxlan_addr remote_ip; 498 __be16 remote_port; 499 __be32 remote_vni; 500 u32 remote_ifindex; 501 u8 eth_addr[ETH_ALEN]; 502 __be32 vni; 503 bool offloaded; 504 bool added_by_user; 505 }; 506 507 #if IS_ENABLED(CONFIG_VXLAN) 508 int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 509 struct switchdev_notifier_vxlan_fdb_info *fdb_info); 510 int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, 511 struct notifier_block *nb, 512 struct netlink_ext_ack *extack); 513 void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni); 514 515 #else 516 static inline int 517 vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 518 struct switchdev_notifier_vxlan_fdb_info *fdb_info) 519 { 520 return -ENOENT; 521 } 522 523 static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, 524 struct notifier_block *nb, 525 struct netlink_ext_ack *extack) 526 { 527 return -EOPNOTSUPP; 528 } 529 530 static inline void 531 vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) 532 { 533 } 534 #endif 535 536 static inline void vxlan_flag_attr_error(int attrtype, 537 struct netlink_ext_ack *extack) 538 { 539 #define VXLAN_FLAG(flg) \ 540 case IFLA_VXLAN_##flg: \ 541 NL_SET_ERR_MSG_MOD(extack, \ 542 "cannot change " #flg " flag"); \ 543 break 544 switch (attrtype) { 545 VXLAN_FLAG(TTL_INHERIT); 546 VXLAN_FLAG(LEARNING); 547 VXLAN_FLAG(PROXY); 548 VXLAN_FLAG(RSC); 549 VXLAN_FLAG(L2MISS); 550 VXLAN_FLAG(L3MISS); 551 VXLAN_FLAG(COLLECT_METADATA); 552 VXLAN_FLAG(UDP_ZERO_CSUM6_TX); 553 VXLAN_FLAG(UDP_ZERO_CSUM6_RX); 554 VXLAN_FLAG(REMCSUM_TX); 555 VXLAN_FLAG(REMCSUM_RX); 556 VXLAN_FLAG(GBP); 557 VXLAN_FLAG(GPE); 558 VXLAN_FLAG(REMCSUM_NOPARTIAL); 559 default: 560 NL_SET_ERR_MSG_MOD(extack, \ 561 "cannot change flag"); 562 break; 563 } 564 #undef VXLAN_FLAG 565 } 566 567 static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh, 568 u32 hash, 569 struct vxlan_rdst *rdst) 570 { 571 struct fib_nh_common *nhc; 572 __be16 dst_port = 0; 573 574 nhc = nexthop_path_fdb_result(nh, hash >> 1, &dst_port); 575 if (unlikely(!nhc)) 576 return false; 577 578 switch (nhc->nhc_gw_family) { 579 case AF_INET: 580 rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4; 581 rdst->remote_ip.sa.sa_family = AF_INET; 582 break; 583 case AF_INET6: 584 rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6; 585 rdst->remote_ip.sa.sa_family = AF_INET6; 586 break; 587 } 588 589 rdst->remote_port = dst_port; 590 591 return true; 592 } 593 594 static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md) 595 { 596 struct vxlanhdr_gbp *gbp; 597 598 if (!md->gbp) 599 return; 600 601 gbp = (struct vxlanhdr_gbp *)vxh; 602 vxh->vx_flags |= VXLAN_HF_GBP; 603 604 if (md->gbp & VXLAN_GBP_DONT_LEARN) 605 gbp->dont_learn = 1; 606 607 if (md->gbp & VXLAN_GBP_POLICY_APPLIED) 608 gbp->policy_applied = 1; 609 610 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); 611 } 612 613 #endif 614