/* * ipip.h: types/functions for ipip. * * Copyright (c) 2018 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or aipiped to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef included_ipip_h #define included_ipip_h #include <vnet/adj/adj_types.h> #include <vnet/ip/ip6_packet.h> #include <vnet/ip/format.h> #include <vnet/ip/ip.h> #include <vnet/tunnel/tunnel.h> extern vnet_hw_interface_class_t ipip_hw_interface_class; #define foreach_ipip_error \ /* Must be first. */ \ _(DECAP_PKTS, "packets decapsulated") \ _(BAD_PROTOCOL, "bad protocol") \ _(NO_TUNNEL, "no tunnel") \ _(FRAGMENTED_PACKET, "fragmented outer packet") typedef enum { #define _(sym, str) IPIP_ERROR_##sym, foreach_ipip_error #undef _ IPIP_N_ERROR, } ipip_error_t; /** * @brief IPIP Tunnel key */ typedef enum { IPIP_TRANSPORT_IP4, IPIP_TRANSPORT_IP6, } __clib_packed ipip_transport_t; typedef enum { IPIP_MODE_P2P = 0, IPIP_MODE_P2MP, IPIP_MODE_6RD, } __clib_packed ipip_mode_t; typedef struct { ip46_address_t src; ip46_address_t dst; u32 fib_index; ipip_transport_t transport; ipip_mode_t mode; u16 __pad; } __clib_packed ipip_tunnel_key_t; STATIC_ASSERT_SIZEOF (ipip_tunnel_key_t, 5 * sizeof (u64)); /** * @brief A representation of a IPIP tunnel */ typedef struct { /* Required for pool_get_aligned */ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); ipip_mode_t mode; ipip_transport_t transport; ip46_address_t tunnel_src; ip46_address_t tunnel_dst; u32 fib_index; u32 hw_if_index; u32 sw_if_index; u32 dev_instance; /* Real device instance in tunnel vector */ u32 user_instance; /* Instance name being shown to user */ tunnel_encap_decap_flags_t flags; ip_dscp_t dscp; struct { ip6_address_t ip6_prefix; ip4_address_t ip4_prefix; u8 ip6_prefix_len; u8 ip4_prefix_len; u8 shift; bool security_check; u32 ip6_fib_index; } sixrd; } ipip_tunnel_t; typedef struct { ipip_tunnel_t *tunnels; uword *tunnel_by_key; u32 *tunnel_index_by_sw_if_index; /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; /* Record used instances */ uword *instance_used; bool ip4_protocol_registered; bool ip6_protocol_registered; u16 msg_id_base; } ipip_main_t; extern ipip_main_t ipip_main; extern vlib_node_registration_t ipip4_input_node; extern vlib_node_registration_t ipip6_input_node; /* * sixrd_get_addr_net */ static_always_inline u32 sixrd_get_addr_net (const ipip_tunnel_t * t, u64 dal) { /* 1:1 mode */ if (t->sixrd.ip4_prefix_len == 32) return (t->sixrd.ip4_prefix.as_u32); dal = clib_net_to_host_u64 (dal); /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset * ip6_prefix_len */ u32 mask = ~(~0ULL << (32 - t->sixrd.ip4_prefix_len)); u32 ip4 = clib_net_to_host_u32 (t->sixrd. ip4_prefix.as_u32) | ((u32) (dal >> t->sixrd. shift) & mask); return clib_host_to_net_u32 (ip4); } int ipip_add_tunnel (ipip_transport_t transport, u32 instance, ip46_address_t * src, ip46_address_t * dst, u32 fib_index, tunnel_encap_decap_flags_t flags, ip_dscp_t dscp, tunnel_mode_t mode, u32 * sw_if_indexp); int ipip_del_tunnel (u32 sw_if_index); int sixrd_add_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len, ip4_address_t * ip4_prefix, u8 ip4_prefix_len, ip4_address_t * ip4_src, bool security_check, u32 ip4_fib_index, u32 ip6_fib_index, u32 * sw_if_index); int sixrd_del_tunnel (u32 sw_if_index); void ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key); void ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key); ipip_tunnel_t *ipip_tunnel_db_find (const ipip_tunnel_key_t * key); ipip_tunnel_t *ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index); void ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key); void ipip_mk_key_i (ipip_transport_t transport, ipip_mode_t mode, const ip46_address_t * src, const ip46_address_t * dst, u32 fib_index, ipip_tunnel_key_t * key); #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */