diff options
Diffstat (limited to 'src/vnet/ipip')
| -rw-r--r-- | src/vnet/ipip/ipip.api | 101 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip.c | 566 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip.h | 168 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip_api.c | 230 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip_cli.c | 318 | ||||
| -rw-r--r-- | src/vnet/ipip/node.c | 268 | ||||
| -rw-r--r-- | src/vnet/ipip/sixrd.c | 519 | ||||
| -rw-r--r-- | src/vnet/ipip/sixrd.h | 72 |
8 files changed, 2242 insertions, 0 deletions
diff --git a/src/vnet/ipip/ipip.api b/src/vnet/ipip/ipip.api new file mode 100644 index 00000000000..988eee599b1 --- /dev/null +++ b/src/vnet/ipip/ipip.api @@ -0,0 +1,101 @@ +/* + * 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 agreed 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. + */ + +option version = "1.0.0"; + +/** \brief Create or delete an IPIP tunnel + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param is_ipv6 - Use 0 for IPv4, 1 for IPv6 + @param instance - optional unique custom device instance, else ~0. + @param src_address - Source IP address + @param dst_address - Destination IP address, can be multicast + @param fib_index - Encap FIB table ID +*/ +define ipip_add_tunnel +{ + u32 client_index; + u32 context; + u8 is_ipv6; + u32 instance; /* If non-~0, specifies a custom dev instance */ + u8 src_address[16]; + u8 dst_address[16]; + u32 fib_index; +}; + +define ipip_add_tunnel_reply +{ + u32 context; + i32 retval; + u32 sw_if_index; +}; + +autoreply define ipip_del_tunnel +{ + u32 client_index; + u32 context; + u32 sw_if_index; +}; + +define ipip_6rd_add_tunnel +{ + u32 client_index; + u32 context; + u32 fib_index; + u8 ip6_prefix[16]; + u8 ip4_prefix[4]; + u8 ip4_src[4]; + u8 ip6_prefix_len; + u8 ip4_prefix_len; + u8 security_check; +}; + +define ipip_6rd_add_tunnel_reply +{ + u32 context; + i32 retval; + u32 sw_if_index; +}; + +autoreply define ipip_6rd_del_tunnel +{ + u32 client_index; + u32 context; + u32 sw_if_index; +}; + +define ipip_tunnel_dump +{ + u32 client_index; + u32 context; + u32 sw_if_index; +}; + +define ipip_tunnel_details +{ + u32 context; + u32 sw_if_index; + u32 instance; + u8 is_ipv6; + u8 src_address[16]; + u8 dst_address[16]; + u32 fib_index; +}; + +/* + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/ipip.c b/src/vnet/ipip/ipip.c new file mode 100644 index 00000000000..82c961cdddd --- /dev/null +++ b/src/vnet/ipip/ipip.c @@ -0,0 +1,566 @@ +/* + * ipip.c: 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. + */ + +#include <stddef.h> +#include <vnet/adj/adj_midchain.h> +#include <vnet/ipip/ipip.h> +#include <vnet/vnet.h> +#include <vnet/adj/adj_nbr.h> +#include <vnet/fib/ip4_fib.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/ip/format.h> +#include <vnet/ipip/ipip.h> + +ipip_main_t ipip_main; + +/* Packet trace structure */ +typedef struct +{ + u32 tunnel_id; + u32 length; + ip46_address_t src; + ip46_address_t dst; +} ipip_tx_trace_t; + +u8 * +format_ipip_tx_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + ipip_tx_trace_t *t = va_arg (*args, ipip_tx_trace_t *); + + s = + format (s, "IPIP: tunnel %d len %d src %U dst %U", t->tunnel_id, + t->length, format_ip46_address, &t->src, IP46_TYPE_ANY, + format_ip46_address, &t->dst, IP46_TYPE_ANY); + return s; +} + +static u8 * +ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, + vnet_link_t link_type, const void *dst_address) +{ + ip4_header_t *ip4; + ip6_header_t *ip6; + u8 *rewrite = NULL; + ipip_tunnel_t *t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + + if (!t) + /* not one of ours */ + return (0); + + switch (t->transport) + { + case IPIP_TRANSPORT_IP4: + vec_validate (rewrite, sizeof (*ip4) - 1); + ip4 = (ip4_header_t *) rewrite; + ip4->ip_version_and_header_length = 0x45; + ip4->ttl = 64; + /* fixup ip4 header length, protocol and checksum after-the-fact */ + ip4->src_address.as_u32 = t->tunnel_src.ip4.as_u32; + ip4->dst_address.as_u32 = t->tunnel_dst.ip4.as_u32; + ip4->checksum = ip4_header_checksum (ip4); + break; + + case IPIP_TRANSPORT_IP6: + vec_validate (rewrite, sizeof (*ip6) - 1); + ip6 = (ip6_header_t *) rewrite; + ip6->ip_version_traffic_class_and_flow_label = + clib_host_to_net_u32 (6 << 28); + ip6->hop_limit = 64; + /* fixup ip6 header length and protocol after-the-fact */ + ip6->src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0]; + ip6->src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1]; + ip6->dst_address.as_u64[0] = t->tunnel_dst.ip6.as_u64[0]; + ip6->dst_address.as_u64[1] = t->tunnel_dst.ip6.as_u64[1]; + break; + default: + /* pass through */ + ; + } + return (rewrite); +} + +static void +ipip4_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b, + const void *data) +{ + ip4_header_t *ip4; + + ip4 = vlib_buffer_get_current (b); + ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b)); + ip4->protocol = + adj->ia_link == VNET_LINK_IP6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP; + ip4->checksum = ip4_header_checksum (ip4); +} + +static void +ipip6_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b, + const void *data) +{ + ip6_header_t *ip6; + + ip6 = vlib_buffer_get_current (b); + ip6->payload_length = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - + sizeof (*ip6)); + ip6->protocol = + adj->ia_link == VNET_LINK_IP6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP; +} + +static void +ipip_tunnel_stack (adj_index_t ai) +{ + ip_adjacency_t *adj; + ipip_tunnel_t *t; + u32 sw_if_index; + + adj = adj_get (ai); + sw_if_index = adj->rewrite_header.sw_if_index; + + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (!t) + return; + + if ((vnet_hw_interface_get_flags (vnet_get_main (), t->hw_if_index) & + VNET_HW_INTERFACE_FLAG_LINK_UP) == 0) + { + adj_nbr_midchain_unstack (ai); + return; + } + + dpo_id_t tmp = DPO_INVALID; + fib_forward_chain_type_t fib_fwd = + t->transport == + IPIP_TRANSPORT_IP6 ? FIB_FORW_CHAIN_TYPE_UNICAST_IP6 : + FIB_FORW_CHAIN_TYPE_UNICAST_IP4; + + fib_entry_contribute_forwarding (t->p2p.fib_entry_index, fib_fwd, &tmp); + if (DPO_LOAD_BALANCE == tmp.dpoi_type) + { + /* + * post IPIP rewrite we will load-balance. However, the IPIP encap + * is always the same for this adjacency/tunnel and hence the IP/IPIP + * src,dst hash is always the same result too. So we do that hash now and + * stack on the choice. + * If the choice is an incomplete adj then we will need a poke when + * it becomes complete. This happens since the adj update walk propagates + * as far a recursive paths. + */ + const dpo_id_t *choice; + load_balance_t *lb; + int hash; + + lb = load_balance_get (tmp.dpoi_index); + + if (fib_fwd == FIB_FORW_CHAIN_TYPE_UNICAST_IP4) + hash = ip4_compute_flow_hash ((ip4_header_t *) adj_get_rewrite (ai), + lb->lb_hash_config); + else + hash = ip6_compute_flow_hash ((ip6_header_t *) adj_get_rewrite (ai), + lb->lb_hash_config); + choice = + load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); + dpo_copy (&tmp, choice); + } + + adj_nbr_midchain_stack (ai, &tmp); + dpo_reset (&tmp); +} + +static adj_walk_rc_t +ipip_adj_walk_cb (adj_index_t ai, void *ctx) +{ + ipip_tunnel_stack (ai); + + return (ADJ_WALK_RC_CONTINUE); +} + +static void +ipip_tunnel_restack (ipip_tunnel_t * gt) +{ + fib_protocol_t proto; + + /* + * walk all the adjacencies on th IPIP interface and restack them + */ + FOR_EACH_FIB_IP_PROTOCOL (proto) + { + adj_nbr_walk (gt->sw_if_index, proto, ipip_adj_walk_cb, NULL); + } +} + +void +ipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) +{ + ipip_tunnel_t *t; + adj_midchain_fixup_t f; + + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (!t) + return; + + f = t->transport == IPIP_TRANSPORT_IP6 ? ipip6_fixup : ipip4_fixup; + + adj_nbr_midchain_update_rewrite (ai, f, NULL, + (VNET_LINK_ETHERNET == + adj_get_link_type (ai) ? + ADJ_FLAG_MIDCHAIN_NO_COUNT : + ADJ_FLAG_NONE), ipip_build_rewrite (vnm, + sw_if_index, + adj_get_link_type + (ai), + NULL)); + ipip_tunnel_stack (ai); +} + +static u8 * +format_ipip_tunnel_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + ipip_main_t *gm = &ipip_main; + ipip_tunnel_t *t; + + if (dev_instance >= vec_len (gm->tunnels)) + return format (s, "<improperly-referenced>"); + + t = pool_elt_at_index (gm->tunnels, dev_instance); + return format (s, "ipip%d", t->user_instance); +} + +static u8 * +format_ipip_device (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + CLIB_UNUSED (int verbose) = va_arg (*args, int); + + s = format (s, "IPIP tunnel: id %d\n", dev_instance); + return s; +} + +static clib_error_t * +ipip_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) +{ + vnet_hw_interface_t *hi; + ipip_tunnel_t *t; + + hi = vnet_get_hw_interface (vnm, hw_if_index); + + t = ipip_tunnel_db_find_by_sw_if_index (hi->sw_if_index); + if (!t) + return 0; + + if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) + vnet_hw_interface_set_flags (vnm, hw_if_index, + VNET_HW_INTERFACE_FLAG_LINK_UP); + else + vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ ); + + ipip_tunnel_restack (t); + + return /* no error */ 0; +} + +/* *INDENT-OFF* */ +VNET_DEVICE_CLASS(ipip_device_class) = { + .name = "IPIP tunnel device", + .format_device_name = format_ipip_tunnel_name, + .format_device = format_ipip_device, + .format_tx_trace = format_ipip_tx_trace, + .admin_up_down_function = ipip_interface_admin_up_down, +#ifdef SOON + .clear counter = 0; +#endif +}; + +VNET_HW_INTERFACE_CLASS(ipip_hw_interface_class) = { + .name = "IPIP", + //.format_header = format_ipip_header_with_length, + //.unformat_header = unformat_ipip_header, + .build_rewrite = ipip_build_rewrite, + .update_adjacency = ipip_update_adj, + .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, +}; +/* *INDENT-ON* */ + +ipip_tunnel_t * +ipip_tunnel_db_find (ipip_tunnel_key_t * key) +{ + ipip_main_t *gm = &ipip_main; + uword *p; + + p = hash_get_mem (gm->tunnel_by_key, key); + if (!p) + return (NULL); + return (pool_elt_at_index (gm->tunnels, p[0])); +} + +ipip_tunnel_t * +ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index) +{ + ipip_main_t *gm = &ipip_main; + if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index) + return NULL; + u32 ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; + if (ti == ~0) + return NULL; + return pool_elt_at_index (gm->tunnels, ti); +} + +void +ipip_tunnel_db_add (ipip_tunnel_t * t, ipip_tunnel_key_t * key) +{ + ipip_main_t *gm = &ipip_main; + + t->key = clib_mem_alloc (sizeof (*t->key)); + clib_memcpy (t->key, key, sizeof (*key)); + hash_set_mem (gm->tunnel_by_key, t->key, t->dev_instance); +} + +void +ipip_tunnel_db_remove (ipip_tunnel_t * t) +{ + ipip_main_t *gm = &ipip_main; + + hash_unset_mem (gm->tunnel_by_key, t->key); + clib_mem_free (t->key); + t->key = NULL; +} + +static ipip_tunnel_t * +ipip_tunnel_from_fib_node (fib_node_t * node) +{ + ipip_main_t *gm = &ipip_main; + ASSERT (gm->fib_node_type == node->fn_type); + return ((ipip_tunnel_t *) (((char *) node) - + offsetof (ipip_tunnel_t, p2p.node))); +} + +static fib_node_back_walk_rc_t +ipip_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) +{ + ipip_tunnel_restack (ipip_tunnel_from_fib_node (node)); + + return (FIB_NODE_BACK_WALK_CONTINUE); +} + +static fib_node_t * +ipip_tunnel_fib_node_get (fib_node_index_t index) +{ + ipip_tunnel_t *gt; + ipip_main_t *gm; + + gm = &ipip_main; + gt = pool_elt_at_index (gm->tunnels, index); + + return (>->p2p.node); +} + +static void +ipip_tunnel_last_lock_gone (fib_node_t * node) +{ + /* + * The MPLS IPIP tunnel is a root of the graph. As such + * it never has children and thus is never locked. + */ + ASSERT (0); +} + +/* + * Virtual function table registered by IPIP tunnels + * for participation in the FIB object graph. + */ +const static fib_node_vft_t ipip_vft = { + .fnv_get = ipip_tunnel_fib_node_get, + .fnv_last_lock = ipip_tunnel_last_lock_gone, + .fnv_back_walk = ipip_tunnel_back_walk, +}; + +static void +ipip_fib_add (ipip_tunnel_t * t) +{ + ipip_main_t *gm = &ipip_main; + fib_prefix_t dst = {.fp_len = t->transport == IPIP_TRANSPORT_IP6 ? 128 : 32, + .fp_proto = + t->transport == + IPIP_TRANSPORT_IP6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4, + .fp_addr = t->tunnel_dst + }; + + t->p2p.fib_entry_index = + fib_table_entry_special_add (t->fib_index, &dst, FIB_SOURCE_RR, + FIB_ENTRY_FLAG_NONE); + t->p2p.sibling_index = + fib_entry_child_add (t->p2p.fib_entry_index, gm->fib_node_type, + t->dev_instance); +} + +static void +ipip_fib_delete (ipip_tunnel_t * t) +{ + fib_entry_child_remove (t->p2p.fib_entry_index, t->p2p.sibling_index); + fib_table_entry_delete_index (t->p2p.fib_entry_index, FIB_SOURCE_RR); + fib_node_deinit (&t->p2p.node); +} + +int +ipip_add_tunnel (ipip_transport_t transport, + u32 instance, ip46_address_t * src, ip46_address_t * dst, + u32 fib_index, u32 * sw_if_indexp) +{ + ipip_main_t *gm = &ipip_main; + vnet_main_t *vnm = gm->vnet_main; + ip4_main_t *im4 = &ip4_main; + ip6_main_t *im6 = &ip6_main; + ipip_tunnel_t *t; + vnet_hw_interface_t *hi; + u32 hw_if_index, sw_if_index; + ipip_tunnel_key_t key = {.transport = transport, + .fib_index = fib_index, + .src = *src, + .dst = *dst + }; + t = ipip_tunnel_db_find (&key); + if (t) + return VNET_API_ERROR_IF_ALREADY_EXISTS; + + pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + + /* Reconcile the real dev_instance and a possible requested instance */ + u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */ + u32 u_idx = instance; /* user specified instance */ + if (u_idx == ~0) + u_idx = t_idx; + if (hash_get (gm->instance_used, u_idx)) + { + pool_put (gm->tunnels, t); + return VNET_API_ERROR_INSTANCE_IN_USE; + } + hash_set (gm->instance_used, u_idx, 1); + + t->dev_instance = t_idx; /* actual */ + t->user_instance = u_idx; /* name */ + fib_node_init (&t->p2p.node, gm->fib_node_type); + + hw_if_index = vnet_register_interface (vnm, ipip_device_class.index, t_idx, + ipip_hw_interface_class.index, + t_idx); + + hi = vnet_get_hw_interface (vnm, hw_if_index); + sw_if_index = hi->sw_if_index; + + t->hw_if_index = hw_if_index; + t->fib_index = fib_index; + t->sw_if_index = sw_if_index; + + t->transport = transport; + vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0); + gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx; + + if (t->transport == IPIP_TRANSPORT_IP4) + { + vec_validate (im4->fib_index_by_sw_if_index, sw_if_index); + hi->min_packet_bytes = 64 + sizeof (ip4_header_t); + } + else + { + vec_validate (im6->fib_index_by_sw_if_index, sw_if_index); + hi->min_packet_bytes = 64 + sizeof (ip6_header_t); + } + + hi->per_packet_overhead_bytes = /* preamble */ 8 + /* inter frame gap */ 12; + + /* Standard default ipip MTU. */ + hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000; + + t->tunnel_src = *src; + t->tunnel_dst = *dst; + + ipip_tunnel_db_add (t, &key); + + /* + * Source the FIB entry for the tunnel's destination and become a + * child thereof. The tunnel will then get poked when the forwarding + * for the entry updates, and the tunnel can re-stack accordingly + */ + ipip_fib_add (t); + if (sw_if_indexp) + *sw_if_indexp = sw_if_index; + + if (t->transport == IPIP_TRANSPORT_IP6 && !gm->ip6_protocol_registered) + { + ip6_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip6_input_node.index); + ip6_register_protocol (IP_PROTOCOL_IPV6, ipip6_input_node.index); + gm->ip6_protocol_registered = true; + } + else if (t->transport == IPIP_TRANSPORT_IP4 && !gm->ip4_protocol_registered) + { + ip4_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip4_input_node.index); + ip4_register_protocol (IP_PROTOCOL_IPV6, ipip4_input_node.index); + gm->ip4_protocol_registered = true; + } + return 0; +} + +int +ipip_del_tunnel (u32 sw_if_index) +{ + ipip_main_t *gm = &ipip_main; + vnet_main_t *vnm = gm->vnet_main; + ipip_tunnel_t *t; + + + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (t == NULL) + return VNET_API_ERROR_NO_SUCH_ENTRY; + + vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ ); + gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0; + vnet_delete_hw_interface (vnm, t->hw_if_index); + ipip_fib_delete (t); + hash_unset (gm->instance_used, t->user_instance); + ipip_tunnel_db_remove (t); + pool_put (gm->tunnels, t); + + return 0; +} + +static clib_error_t * +ipip_init (vlib_main_t * vm) +{ + ipip_main_t *gm = &ipip_main; + + memset (gm, 0, sizeof (gm[0])); + gm->vlib_main = vm; + gm->vnet_main = vnet_get_main (); + gm->tunnel_by_key = + hash_create_mem (0, sizeof (ipip_tunnel_key_t), sizeof (uword)); + gm->fib_node_type = fib_node_register_new_type (&ipip_vft); + + return 0; +} + +VLIB_INIT_FUNCTION (ipip_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/ipip.h b/src/vnet/ipip/ipip.h new file mode 100644 index 00000000000..e9277d8a061 --- /dev/null +++ b/src/vnet/ipip/ipip.h @@ -0,0 +1,168 @@ +/* + * 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/vnet.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") + +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, +} ipip_transport_t; + +typedef struct +{ + ipip_transport_t transport; + u32 fib_index; + ip46_address_t src; + ip46_address_t dst; +} __attribute__ ((packed)) ipip_tunnel_key_t; + +typedef enum +{ + IPIP_MODE_P2P = 0, + IPIP_MODE_6RD, +} ipip_mode_t; + +/** + * @brief A representation of a IPIP tunnel + */ +typedef struct +{ + ipip_mode_t mode; + ipip_transport_t transport; + ipip_tunnel_key_t *key; + 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 */ + + union + { + struct + { + fib_node_t node; + fib_node_index_t fib_entry_index; + u32 sibling_index; + } p2p; + struct + { + ip6_address_t ip6_prefix; + ip4_address_t ip4_prefix; + u8 ip6_prefix_len; + u8 ip4_prefix_len; + u8 shift; + bool security_check; + } sixrd; + }; +} ipip_tunnel_t; + +typedef struct +{ + ipip_tunnel_t *tunnels; + uword *tunnel_by_key; + u32 *tunnel_index_by_sw_if_index; + fib_node_type_t fib_node_type; + + /* 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; +} 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, 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 fib_index, u32 * sw_if_index); +int sixrd_del_tunnel (u32 sw_if_index); +void ipip_tunnel_db_add (ipip_tunnel_t * t, ipip_tunnel_key_t * key); +void ipip_tunnel_db_remove (ipip_tunnel_t * t); +ipip_tunnel_t *ipip_tunnel_db_find (ipip_tunnel_key_t * key); +ipip_tunnel_t *ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index); + +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/ipip_api.c b/src/vnet/ipip/ipip_api.c new file mode 100644 index 00000000000..a6633296515 --- /dev/null +++ b/src/vnet/ipip/ipip_api.c @@ -0,0 +1,230 @@ +/* + * ipip_api.c - ipip api + * + * 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 agreed 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. + */ + +#include <vlibmemory/api.h> +#include <vnet/api_errno.h> +#include <vnet/fib/fib_table.h> +#include <vnet/interface.h> +#include <vnet/ipip/ipip.h> +#include <vnet/vnet.h> +#include <vnet/vnet_msg_enum.h> + +#define vl_typedefs /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_typedefs + +#define vl_endianfun /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output(handle, __VA_ARGS__) +#define vl_printfun +#include <vnet/vnet_all_api_h.h> +#undef vl_printfun + +#include <vlibapi/api_helper_macros.h> + +#define foreach_vpe_api_msg \ + _(IPIP_ADD_TUNNEL, ipip_add_tunnel) \ + _(IPIP_DEL_TUNNEL, ipip_del_tunnel) \ + _(IPIP_6RD_ADD_TUNNEL, ipip_6rd_add_tunnel) \ + _(IPIP_6RD_DEL_TUNNEL, ipip_6rd_del_tunnel) \ + _(IPIP_TUNNEL_DUMP, ipip_tunnel_dump) + +static void +vl_api_ipip_add_tunnel_t_handler (vl_api_ipip_add_tunnel_t * mp) +{ + vl_api_ipip_add_tunnel_reply_t *rmp; + int rv = 0; + u32 sw_if_index = ~0; + ip46_address_t src = ip46_address_initializer, dst = + ip46_address_initializer; + + /* ip addresses sent in network byte order */ + if (mp->is_ipv6) + { + clib_memcpy (&src.ip6, mp->src_address, 16); + clib_memcpy (&dst.ip6, mp->dst_address, 16); + } + else + { + clib_memcpy (&src.ip4, mp->src_address, 4); + clib_memcpy (&dst.ip4, mp->dst_address, 4); + } + + rv = ipip_add_tunnel (mp->is_ipv6 ? IPIP_TRANSPORT_IP6 : IPIP_TRANSPORT_IP4, + ntohl (mp->instance), &src, &dst, + ntohl (mp->fib_index), &sw_if_index); + + /* *INDENT-OFF* */ + REPLY_MACRO2(VL_API_IPIP_ADD_TUNNEL_REPLY, + ({ rmp->sw_if_index = ntohl(sw_if_index); })); + /* *INDENT-ON* */ +} + +static void +vl_api_ipip_del_tunnel_t_handler (vl_api_ipip_del_tunnel_t * mp) +{ + vl_api_ipip_del_tunnel_reply_t *rmp; + + int rv = ipip_del_tunnel (ntohl (mp->sw_if_index)); + + REPLY_MACRO (VL_API_IPIP_DEL_TUNNEL_REPLY); +} + +static void +send_ipip_tunnel_details (ipip_tunnel_t * t, + vl_api_registration_t * reg, u32 context) +{ + vl_api_ipip_tunnel_details_t *rmp; + bool is_ipv6 = t->transport == IPIP_TRANSPORT_IP6 ? true : false; + fib_table_t *ft; + + rmp = vl_msg_api_alloc (sizeof (*rmp)); + memset (rmp, 0, sizeof (*rmp)); + rmp->_vl_msg_id = htons (VL_API_IPIP_TUNNEL_DETAILS); + if (is_ipv6) + { + clib_memcpy (rmp->src_address, &t->tunnel_src.ip6.as_u8, 16); + clib_memcpy (rmp->dst_address, &t->tunnel_dst.ip6.as_u8, 16); + ft = fib_table_get (t->fib_index, FIB_PROTOCOL_IP6); + rmp->fib_index = htonl (ft->ft_table_id); + } + else + { + clib_memcpy (rmp->src_address, &t->tunnel_src.ip4.as_u8, 4); + clib_memcpy (rmp->dst_address, &t->tunnel_dst.ip4.as_u8, 4); + ft = fib_table_get (t->fib_index, FIB_PROTOCOL_IP4); + rmp->fib_index = htonl (ft->ft_table_id); + } + rmp->instance = htonl (t->user_instance); + rmp->sw_if_index = htonl (t->sw_if_index); + rmp->context = context; + rmp->is_ipv6 = is_ipv6; + + vl_api_send_msg (reg, (u8 *) rmp); +} + +static void +vl_api_ipip_tunnel_dump_t_handler (vl_api_ipip_tunnel_dump_t * mp) +{ + vl_api_registration_t *reg; + ipip_main_t *gm = &ipip_main; + ipip_tunnel_t *t; + u32 sw_if_index; + + reg = vl_api_client_index_to_registration (mp->client_index); + if (!reg) + return; + + sw_if_index = ntohl (mp->sw_if_index); + + if (sw_if_index == ~0) + { + /* *INDENT-OFF* */ + pool_foreach(t, gm->tunnels, + ({ send_ipip_tunnel_details(t, reg, mp->context); })); + /* *INDENT-ON* */ + } + else + { + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (t) + send_ipip_tunnel_details (t, reg, mp->context); + } +} + +static void +vl_api_ipip_6rd_add_tunnel_t_handler (vl_api_ipip_6rd_add_tunnel_t * mp) +{ + vl_api_ipip_6rd_add_tunnel_reply_t *rmp; + u32 sixrd_tunnel_index; + + int rv = sixrd_add_tunnel ((ip6_address_t *) & mp->ip6_prefix, + mp->ip6_prefix_len, + (ip4_address_t *) & mp->ip4_prefix, + mp->ip4_prefix_len, + (ip4_address_t *) & mp->ip4_src, + mp->security_check, + ntohl (mp->fib_index), &sixrd_tunnel_index); + + REPLY_MACRO2 (VL_API_IPIP_6RD_ADD_TUNNEL_REPLY, ( + { + rmp->sw_if_index = + htonl + (sixrd_tunnel_index);})); +} + +static void +vl_api_ipip_6rd_del_tunnel_t_handler (vl_api_ipip_6rd_del_tunnel_t * mp) +{ + vl_api_ipip_6rd_del_tunnel_reply_t *rmp; + + int rv = sixrd_del_tunnel (ntohl (mp->sw_if_index)); + + REPLY_MACRO (VL_API_IPIP_6RD_DEL_TUNNEL_REPLY); +} + +/* + * ipip_api_hookup + * Add vpe's API message handlers to the table. + * vlib has alread mapped shared memory and + * added the client registration handlers. + * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process() + */ +#define vl_msg_name_crc_list +#include <vnet/vnet_all_api_h.h> +#undef vl_msg_name_crc_list + +static void +setup_message_id_table (api_main_t * am) +{ +#define _(id, n, crc) vl_msg_api_add_msg_name_crc(am, #n "_" #crc, id); + foreach_vl_msg_name_crc_ipip; +#undef _ +} + +static clib_error_t * +ipip_api_hookup (vlib_main_t * vm) +{ + api_main_t *am = &api_main; + +#define _(N, n) \ + vl_msg_api_set_handlers(VL_API_##N, #n, vl_api_##n##_t_handler, \ + vl_noop_handler, vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, sizeof(vl_api_##n##_t), 1); + foreach_vpe_api_msg; +#undef _ + + /* + * Set up the (msg_name, crc, message-id) table + */ + setup_message_id_table (am); + + return 0; +} + +VLIB_API_INIT_FUNCTION (ipip_api_hookup); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/ipip_cli.c b/src/vnet/ipip/ipip_cli.c new file mode 100644 index 00000000000..45e6451d69a --- /dev/null +++ b/src/vnet/ipip/ipip_cli.c @@ -0,0 +1,318 @@ +/* + * 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 agreed 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. + */ + +#include "ipip.h" +#include <vppinfra/error.h> +#include <vnet/vnet.h> + +static clib_error_t *create_ipip_tunnel_command_fn(vlib_main_t *vm, + unformat_input_t *input, + vlib_cli_command_t *cmd) { + unformat_input_t _line_input, *line_input = &_line_input; + ip46_address_t src = ip46_address_initializer, dst = ip46_address_initializer; + u32 instance = ~0; + u32 fib_index = 0; + int rv; + u32 num_m_args = 0; + u32 sw_if_index; + clib_error_t *error = NULL; + bool ip4_set = false, ip6_set = false; + + /* Get a line of input. */ + if (!unformat_user(input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input(line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat(line_input, "instance %d", &instance)) + ; + else if (unformat(line_input, "src %U", unformat_ip4_address, &src.ip4)) { + num_m_args++; + ip4_set = true; + } else if (unformat(line_input, "dst %U", unformat_ip4_address, &dst.ip4)) { + num_m_args++; + ip4_set = true; + } else if (unformat(line_input, "src %U", unformat_ip6_address, &src.ip6)) { + num_m_args++; + ip6_set = true; + } else if (unformat(line_input, "dst %U", unformat_ip6_address, &dst.ip6)) { + num_m_args++; + ip6_set = true; + } else if (unformat(line_input, "outer-fib-id %d", &fib_index)) + ; + else { + error = clib_error_return(0, "unknown input `%U'", format_unformat_error, + line_input); + goto done; + } + } + + if (num_m_args < 2) { + error = clib_error_return(0, "mandatory argument(s) missing"); + goto done; + } + if (ip4_set && ip6_set) { + error = clib_error_return(0, "source and destination must be of same address family"); + goto done; + } + + rv = ipip_add_tunnel(ip6_set ? IPIP_TRANSPORT_IP6 : IPIP_TRANSPORT_IP4, + instance, + &src, + &dst, + fib_index, + &sw_if_index); + + switch (rv) { + case 0: + vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), + sw_if_index); + break; + case VNET_API_ERROR_IF_ALREADY_EXISTS: + error = clib_error_return(0, "IPIP tunnel already exists..."); + goto done; + case VNET_API_ERROR_NO_SUCH_FIB: + error = clib_error_return(0, "outer fib ID %d doesn't exist\n", fib_index); + goto done; + case VNET_API_ERROR_NO_SUCH_ENTRY: + error = clib_error_return(0, "IPIP tunnel doesn't exist"); + goto done; + case VNET_API_ERROR_INSTANCE_IN_USE: + error = clib_error_return(0, "Instance is in use"); + goto done; + default: + error = clib_error_return(0, "vnet_ipip_add_del_tunnel returned %d", rv); + goto done; + } + +done: + unformat_free(line_input); + + return error; +} + +static clib_error_t *delete_ipip_tunnel_command_fn(vlib_main_t *vm, + unformat_input_t *input, + vlib_cli_command_t *cmd) { + unformat_input_t _line_input, *line_input = &_line_input; + int rv; + u32 num_m_args = 0; + u32 sw_if_index = ~0; + clib_error_t *error = NULL; + + /* Get a line of input. */ + if (!unformat_user(input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input(line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat(line_input, "sw_if_index %d", &sw_if_index)) + num_m_args++; + else { + error = clib_error_return(0, "unknown input `%U'", format_unformat_error, + line_input); + goto done; + } + } + + if (num_m_args < 1) { + error = clib_error_return(0, "mandatory argument(s) missing"); + goto done; + } + + rv = ipip_del_tunnel(sw_if_index); + printf("RV %d\n", rv); + +done: + unformat_free(line_input); + + return error; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND(create_ipip_tunnel_command, static) = { + .path = "create ipip tunnel", + .short_help = "create ipip tunnel src <addr> dst <addr> [instance <n>] " + "[outer-fib-id <fib>]", + .function = create_ipip_tunnel_command_fn, +}; +VLIB_CLI_COMMAND(delete_ipip_tunnel_command, static) = { + .path = "delete ipip tunnel", + .short_help = "delete ipip tunnel sw_if_index <sw_if_index ", + .function = delete_ipip_tunnel_command_fn, +}; +/* *INDENT-ON* */ + +static u8 *format_ipip_tunnel(u8 *s, va_list *args) { + ipip_tunnel_t *t = va_arg(*args, ipip_tunnel_t *); + + ip46_type_t type = (t->transport == IPIP_TRANSPORT_IP4) ? IP46_TYPE_IP4 : IP46_TYPE_IP6; + switch (t->mode) { + case IPIP_MODE_6RD: + s = format(s, "[%d] 6rd src %U ip6-pfx %U/%d fib-idx %d sw-if-idx %d ", + t->dev_instance, + format_ip46_address, &t->tunnel_src, type, + format_ip6_address, &t->sixrd.ip6_prefix, t->sixrd.ip6_prefix_len, + t->fib_index, t->sw_if_index); + break; + case IPIP_MODE_P2P: + default: + s = format(s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ", + t->dev_instance, t->user_instance, + format_ip46_address, &t->tunnel_src, type, + format_ip46_address, &t->tunnel_dst, type, + t->fib_index, t->sw_if_index); + break; + } + + return s; +} + +static clib_error_t *show_ipip_tunnel_command_fn(vlib_main_t *vm, + unformat_input_t *input, + vlib_cli_command_t *cmd) { + ipip_main_t *gm = &ipip_main; + ipip_tunnel_t *t; + u32 ti = ~0; + + if (pool_elts(gm->tunnels) == 0) + vlib_cli_output(vm, "No IPIP tunnels configured..."); + + while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) { + if (unformat(input, "%d", &ti)) + ; + else + break; + } + + if (ti == ~0) { + /* *INDENT-OFF* */ + pool_foreach(t, gm->tunnels, + ({vlib_cli_output(vm, "%U", format_ipip_tunnel, t); })); + /* *INDENT-ON* */ + } else { + t = pool_elt_at_index(gm->tunnels, ti); + if (t) + vlib_cli_output(vm, "%U", format_ipip_tunnel, t); + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND(show_ipip_tunnel_command, static) = { + .path = "show ipip tunnel", + .function = show_ipip_tunnel_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t *create_sixrd_tunnel_command_fn(vlib_main_t *vm, + unformat_input_t *input, + vlib_cli_command_t *cmd) { + unformat_input_t _line_input, *line_input = &_line_input; + ip4_address_t ip4_prefix; + ip6_address_t ip6_prefix; + ip4_address_t ip4_src; + u32 ip6_prefix_len = 0, ip4_prefix_len = 0, sixrd_tunnel_index; + u32 num_m_args = 0; + /* Optional arguments */ + u32 fib_index = 0; + clib_error_t *error = 0; + bool security_check = false; + + /* Get a line of input. */ + if (!unformat_user(input, unformat_line_input, line_input)) + return 0; + while (unformat_check_input(line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat(line_input, "security-check")) + security_check = true; + else if (unformat(line_input, "ip6-pfx %U/%d", unformat_ip6_address, + &ip6_prefix, &ip6_prefix_len)) + num_m_args++; + else if (unformat(line_input, "ip4-pfx %U/%d", unformat_ip4_address, + &ip4_prefix, &ip4_prefix_len)) + num_m_args++; + else if (unformat(line_input, "ip4-src %U", unformat_ip4_address, &ip4_src)) + num_m_args++; + else if (unformat(line_input, "fib-id %d", &fib_index)) + ; + else { + error = clib_error_return(0, "unknown input `%U'", format_unformat_error, + line_input); + goto done; + } + } + + if (num_m_args < 3) { + error = clib_error_return(0, "mandatory argument(s) missing"); + goto done; + } + int rv = sixrd_add_tunnel(&ip6_prefix, ip6_prefix_len, &ip4_prefix, + ip4_prefix_len, &ip4_src, security_check, + fib_index, &sixrd_tunnel_index); + if (rv) + error = clib_error_return(0, "adding tunnel failed %d", rv); + + done: + unformat_free(line_input); + + return error; +} + +static clib_error_t *delete_sixrd_tunnel_command_fn(vlib_main_t *vm, + unformat_input_t *input, + vlib_cli_command_t *cmd) { + unformat_input_t _line_input, *line_input = &_line_input; + u32 num_m_args = 0; + /* Optional arguments */ + clib_error_t *error = 0; + u32 sw_if_index = ~0; + + /* Get a line of input. */ + if (!unformat_user(input, unformat_line_input, line_input)) + return 0; + while (unformat_check_input(line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat(line_input, "sw_if_index %d", &sw_if_index)) + num_m_args++; + else { + error = clib_error_return(0, "unknown input `%U'", format_unformat_error, + line_input); + goto done; + } + } + + if (num_m_args < 1) { + error = clib_error_return(0, "mandatory argument(s) missing"); + goto done; + } + int rv = sixrd_del_tunnel(sw_if_index); + printf("RV %d\n", rv); + +done: + unformat_free(line_input); + + return error; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND(create_sixrd_tunnel_command, static) = { + .path = "create 6rd tunnel", + .short_help = "create 6rd tunnel ip6-pfx <ip6-pfx> ip4-pfx <ip4-pfx> " + "ip4-src <ip4-addr> [del]", + .function = create_sixrd_tunnel_command_fn, +}; +VLIB_CLI_COMMAND(delete_sixrd_tunnel_command, static) = { + .path = "delete 6rd tunnel", + .short_help = "delete 6rd tunnel sw_if_index <sw_if_index", + .function = delete_sixrd_tunnel_command_fn, +}; +/* *INDENT-ON* */ diff --git a/src/vnet/ipip/node.c b/src/vnet/ipip/node.c new file mode 100644 index 00000000000..f24ea97b2cd --- /dev/null +++ b/src/vnet/ipip/node.c @@ -0,0 +1,268 @@ +/* + * node.c: ipip packet processing + * + * 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. + */ + +#include <vlib/vlib.h> +#include <vnet/ipip/ipip.h> +#include <vnet/ip/ip6_packet.h> +#include <vnet/mpls/mpls.h> +#include <vnet/pg/pg.h> +#include <vppinfra/sparse_vec.h> + +#define foreach_ipip_input_next \ + _(PUNT, "error-punt") \ + _(DROP, "error-drop") \ + _(IP4_INPUT, "ip4-input") \ + _(IP6_INPUT, "ip6-input") + +typedef enum +{ +#define _(s, n) IPIP_INPUT_NEXT_##s, + foreach_ipip_input_next +#undef _ + IPIP_INPUT_N_NEXT, +} ipip_input_next_t; + +typedef struct +{ + u32 tunnel_id; + u32 length; + ip46_address_t src; + ip46_address_t dst; + u8 is_ipv6; +} ipip_rx_trace_t; + +u8 * +format_ipip_rx_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + ipip_rx_trace_t *t = va_arg (*args, ipip_rx_trace_t *); + + s = format (s, "IPIP: tunnel %d len %d src %U dst %U", t->tunnel_id, + clib_net_to_host_u16 (t->length), format_ip46_address, &t->src, + IP46_TYPE_ANY, format_ip46_address, &t->dst, IP46_TYPE_ANY); + return s; +} + +always_inline uword +ipip_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame, bool is_ipv6) +{ + ipip_main_t *gm = &ipip_main; + u32 n_left_from, next_index, *from, *to_next, n_left_to_next; + u32 tunnel_sw_if_index = ~0; + u32 thread_index = vlib_get_thread_index (); + u32 len; + vnet_interface_main_t *im = &gm->vnet_main->interface_main; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + next_index = node->cached_next_index; + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip4_header_t *ip40; + ip6_header_t *ip60; + u32 next0 = IPIP_INPUT_NEXT_DROP; + ip46_address_t src0 = ip46_address_initializer, dst0 = + ip46_address_initializer; + ipip_transport_t transport0; + u8 inner_protocol0; + + bi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + if (is_ipv6) + { + ip60 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, sizeof (*ip60)); + ip_set (&src0, &ip60->src_address, false); + ip_set (&dst0, &ip60->dst_address, false); + inner_protocol0 = ip60->protocol; + transport0 = IPIP_TRANSPORT_IP6; + } + else + { + ip40 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, sizeof (*ip40)); + ip_set (&src0, &ip40->src_address, true); + ip_set (&dst0, &ip40->dst_address, true); + inner_protocol0 = ip40->protocol; + transport0 = IPIP_TRANSPORT_IP4; + } + + /* + * Find tunnel. First a lookup for P2P tunnels, then a lookup + * for multipoint tunnels + */ + ipip_tunnel_key_t key0 = {.transport = transport0, + .fib_index = vnet_buffer (b0)->ip.fib_index, + .src = dst0, + .dst = src0 + }; + ipip_tunnel_t *t0 = ipip_tunnel_db_find (&key0); + if (!t0) + { + ip46_address_reset (&key0.dst); + t0 = ipip_tunnel_db_find (&key0); + if (!t0) + { + next0 = IPIP_INPUT_NEXT_DROP; + b0->error = node->errors[IPIP_ERROR_NO_TUNNEL]; + goto drop; + } + } + tunnel_sw_if_index = t0->sw_if_index; + + len = vlib_buffer_length_in_chain (vm, b0); + vnet_buffer (b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index; + + if (inner_protocol0 == IP_PROTOCOL_IPV6) + next0 = IPIP_INPUT_NEXT_IP6_INPUT; + else if (inner_protocol0 == IP_PROTOCOL_IP_IN_IP) + next0 = IPIP_INPUT_NEXT_IP4_INPUT; + + if (!is_ipv6 && t0->mode == IPIP_MODE_6RD + && t0->sixrd.security_check) + { + ip6_header_t *inner_ip60 = vlib_buffer_get_current (b0); + if (sixrd_get_addr_net (t0, inner_ip60->src_address.as_u64[0]) + != ip40->src_address.as_u32) + { + next0 = IPIP_INPUT_NEXT_DROP; + b0->error = node->errors[IPIP_ERROR_NO_TUNNEL]; + goto drop; + } + } + + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_RX, + thread_index, tunnel_sw_if_index, + 1 /* packets */ , + len /* bytes */ ); + + drop: + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + ipip_rx_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->tunnel_id = tunnel_sw_if_index; + if (is_ipv6) + { + tr->length = ip60->payload_length; + tr->src.ip6.as_u64[0] = ip60->src_address.as_u64[0]; + tr->src.ip6.as_u64[1] = ip60->src_address.as_u64[1]; + tr->dst.ip6.as_u64[0] = ip60->dst_address.as_u64[0]; + tr->dst.ip6.as_u64[1] = ip60->dst_address.as_u64[1]; + } + else + { + tr->length = ip40->length; + tr->src.ip4.as_u32 = ip40->src_address.as_u32; + tr->dst.ip4.as_u32 = ip40->dst_address.as_u32; + } + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + vlib_node_increment_counter (vm, + !is_ipv6 ? ipip4_input_node.index : + ipip6_input_node.index, IPIP_ERROR_DECAP_PKTS, + from_frame->n_vectors); + return from_frame->n_vectors; +} + +static uword +ipip4_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return ipip_input (vm, node, from_frame, /* is_ip6 */ false); +} + +static uword +ipip6_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return ipip_input (vm, node, from_frame, /* is_ip6 */ true); +} + +static char *ipip_error_strings[] = { +#define _(sym,string) string, + foreach_ipip_error +#undef _ +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE(ipip4_input_node) = { + .function = ipip4_input, + .name = "ipip4-input", + /* Takes a vector of packets. */ + .vector_size = sizeof(u32), + .n_errors = IPIP_N_ERROR, + .error_strings = ipip_error_strings, + .n_next_nodes = IPIP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s, n) [IPIP_INPUT_NEXT_##s] = n, + foreach_ipip_input_next +#undef _ + }, + .format_trace = format_ipip_rx_trace, +}; + +VLIB_REGISTER_NODE(ipip6_input_node) = { + .function = ipip6_input, + .name = "ipip6-input", + /* Takes a vector of packets. */ + .vector_size = sizeof(u32), + .n_errors = IPIP_N_ERROR, + .error_strings = ipip_error_strings, + .n_next_nodes = IPIP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s, n) [IPIP_INPUT_NEXT_##s] = n, + foreach_ipip_input_next +#undef _ + }, + .format_trace = format_ipip_rx_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH(ipip4_input_node, ipip4_input) +VLIB_NODE_FUNCTION_MULTIARCH(ipip6_input_node, ipip6_input) +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/sixrd.c b/src/vnet/ipip/sixrd.c new file mode 100644 index 00000000000..c44c8345e30 --- /dev/null +++ b/src/vnet/ipip/sixrd.c @@ -0,0 +1,519 @@ +/* + * sixrd.c - 6RD specific functions (RFC5969) + * + * 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 agreed 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. + */ + +/** + * This code supports the following sixrd modes: + * + * 32 EA bits (Complete IPv4 address is embedded): + * ea_bits_len = 32 + * IPv4 suffix is embedded: + * ea_bits_len = < 32 + * No embedded address bits (1:1 mode): + * ea_bits_len = 0 + */ + +#include "ipip.h" +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vnet/adj/adj.h> +#include <vnet/adj/adj_delegate.h> +#include <vnet/adj/adj_midchain.h> +#include <vnet/dpo/lookup_dpo.h> +#include <vnet/fib/fib_table.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/plugin/plugin.h> +#include <vpp/app/version.h> // Really needed? + +extern vlib_node_registration_t ip4_sixrd_node; + +/** + * Adj delegate data + */ +typedef struct sixrd_adj_delegate_t_ +{ + u32 adj_index; + fib_node_t sixrd_node; + fib_node_index_t sixrd_fib_entry_index; + u32 sixrd_sibling; +} sixrd_adj_delegate_t; + +/** + * Pool of delegate structs + */ +static sixrd_adj_delegate_t *sixrd_adj_delegate_pool; + +/** + * Adj delegate registered type + */ +static adj_delegate_type_t sixrd_adj_delegate_type; + +/** + * FIB node registered type + */ +static fib_node_type_t sixrd_fib_node_type; + +static inline sixrd_adj_delegate_t * +sixrd_adj_from_base (adj_delegate_t * ad) +{ + if (ad == NULL) + return (NULL); + return (pool_elt_at_index (sixrd_adj_delegate_pool, ad->ad_index)); +} + +static inline const sixrd_adj_delegate_t * +sixrd_adj_from_const_base (const adj_delegate_t * ad) +{ + if (ad == NULL) + { + return (NULL); + } + return (pool_elt_at_index (sixrd_adj_delegate_pool, ad->ad_index)); +} + +static void +sixrd_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b0, + const void *data) +{ + ip4_header_t *ip4 = vlib_buffer_get_current (b0); + ip6_header_t *ip6 = vlib_buffer_get_current (b0) + sizeof (ip4_header_t); + const ipip_tunnel_t *t = data; + + ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); + ip4->dst_address.as_u32 = + sixrd_get_addr_net (t, ip6->dst_address.as_u64[0]); + ip4->checksum = ip4_header_checksum (ip4); +} + +static void +ip6ip_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b0, + const void *data) +{ + const ipip_tunnel_t *t = data; + ip4_header_t *ip4 = vlib_buffer_get_current (b0); + ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); + ip4->dst_address.as_u32 = + sixrd_get_addr_net (t, adj->sub_type.nbr.next_hop.as_u64[0]); + ip4->checksum = ip4_header_checksum (ip4); +} + +static u8 * +sixrd_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, + vnet_link_t link_type, const void *dst_address) +{ + u8 *rewrite = NULL; + ipip_tunnel_t *t; + + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (!t) + return 0; + + vec_validate (rewrite, sizeof (ip4_header_t) - 1); + ip4_header_t *ip4 = (ip4_header_t *) rewrite; + ip4->ip_version_and_header_length = 0x45; + ip4->ttl = 64; + ip4->protocol = IP_PROTOCOL_IPV6; + /* fixup ip4 header length and checksum after-the-fact */ + ip4->src_address.as_u32 = t->tunnel_src.ip4.as_u32; + ip4->dst_address.as_u32 = 0; + ip4->checksum = ip4_header_checksum (ip4); + + return rewrite; +} + +static void +ip6ip_tunnel_stack (adj_index_t ai, u32 fib_entry_index) +{ + ip_adjacency_t *adj = adj_get (ai); + ipip_tunnel_t *t; + u32 sw_if_index = adj->rewrite_header.sw_if_index; + + t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (!t) + return; + + /* + * find the adjacency that is contributed by the FIB entry + * that this tunnel resolves via, and use it as the next adj + * in the midchain + */ + if (vnet_hw_interface_get_flags (vnet_get_main (), t->hw_if_index) & + VNET_HW_INTERFACE_FLAG_LINK_UP) + { + adj_nbr_midchain_stack (ai, + fib_entry_contribute_ip_forwarding + (fib_entry_index)); + } + else + { + adj_nbr_midchain_unstack (ai); + } +} + +static void +sixrd_tunnel_stack (adj_index_t ai, u32 fib_index) +{ + dpo_id_t dpo = DPO_INVALID; + ip_adjacency_t *adj = adj_get (ai); + u32 sw_if_index = adj->rewrite_header.sw_if_index; + + ipip_tunnel_t *t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + if (!t) + return; + + lookup_dpo_add_or_lock_w_fib_index (fib_index, DPO_PROTO_IP4, + LOOKUP_UNICAST, LOOKUP_INPUT_DST_ADDR, + LOOKUP_TABLE_FROM_CONFIG, &dpo); + adj_nbr_midchain_stack (ai, &dpo); +} + +const static ip46_address_t sixrd_special_nh = { + .ip6 = { + .as_u64 = { + [0] = 0xffffffffffffffff, + [1] = 0xffffffffffffffff, + }, + }, +}; + +static void +sixrd_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) +{ + ip_adjacency_t *adj = adj_get (ai); + ipip_tunnel_t *t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + + if (!memcmp (&sixrd_special_nh, &adj->sub_type.nbr.next_hop, + sizeof (sixrd_special_nh))) + { + adj_nbr_midchain_update_rewrite (ai, sixrd_fixup, t, ADJ_FLAG_NONE, + sixrd_build_rewrite (vnm, sw_if_index, + adj_get_link_type + (ai), NULL)); + sixrd_tunnel_stack (ai, t->fib_index); + } + else + { + sixrd_adj_delegate_t *sixrd_ad; + ip4_address_t da4; + + da4.as_u32 = + sixrd_get_addr_net (t, adj->sub_type.nbr.next_hop.as_u64[0]); + + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = { + .ip4 = da4, + } + , + }; + + adj_nbr_midchain_update_rewrite (ai, ip6ip_fixup, t, ADJ_FLAG_NONE, + sixrd_build_rewrite (vnm, sw_if_index, + adj_get_link_type + (ai), NULL)); + + sixrd_ad = + sixrd_adj_from_base (adj_delegate_get (adj, sixrd_adj_delegate_type)); + if (sixrd_ad == NULL) + { + pool_get (sixrd_adj_delegate_pool, sixrd_ad); + fib_node_init (&sixrd_ad->sixrd_node, sixrd_fib_node_type); + sixrd_ad->adj_index = ai; + sixrd_ad->sixrd_fib_entry_index = + fib_table_entry_special_add (t->fib_index, &pfx, FIB_SOURCE_RR, + FIB_ENTRY_FLAG_NONE); + sixrd_ad->sixrd_sibling = + fib_entry_child_add (sixrd_ad->sixrd_fib_entry_index, + sixrd_fib_node_type, + sixrd_ad - sixrd_adj_delegate_pool); + + adj_delegate_add (adj, sixrd_adj_delegate_type, + sixrd_ad - sixrd_adj_delegate_pool); + + ip6ip_tunnel_stack (ai, sixrd_ad->sixrd_fib_entry_index); + } + } +} + +clib_error_t * +sixrd_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) +{ + /* Always up */ + vnet_hw_interface_set_flags (vnm, hw_if_index, + VNET_HW_INTERFACE_FLAG_LINK_UP); + return /* no error */ 0; +} + +/* *INDENT-OFF* */ +VNET_HW_INTERFACE_CLASS(sixrd_hw_interface_class) = { + .name = "ip6ip-6rd", + .build_rewrite = sixrd_build_rewrite, + .update_adjacency = sixrd_update_adj, +}; + +VNET_DEVICE_CLASS(sixrd_device_class) = { + .name = "ip6ip-6rd", + .admin_up_down_function = sixrd_interface_admin_up_down, +#ifdef SOON + .clear counter = 0; +#endif +} +; +/* *INDENT-ON* */ + +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 fib_index, u32 * sw_if_index) +{ + ipip_main_t *gm = &ipip_main; + ipip_tunnel_t *t; + + if (fib_index == ~0) + return VNET_API_ERROR_NO_SUCH_FIB; + + if ((ip6_prefix_len + 32 - ip4_prefix_len) > 64) + return VNET_API_ERROR_INVALID_VALUE; + + /* Tunnel already configured */ + ip46_address_t src = ip46_address_initializer, dst = + ip46_address_initializer; + ip_set (&src, ip4_src, true); + ipip_tunnel_key_t key = {.transport = IPIP_TRANSPORT_IP4, + .fib_index = fib_index, + .src = src, + .dst = dst + }; + + t = ipip_tunnel_db_find (&key); + if (t) + return VNET_API_ERROR_IF_ALREADY_EXISTS; + + /* Get tunnel index */ + pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */ + + /* Init tunnel struct */ + t->mode = IPIP_MODE_6RD; + t->sixrd.ip4_prefix.as_u32 = ip4_prefix->as_u32; + t->sixrd.ip4_prefix_len = ip4_prefix_len; + t->sixrd.ip6_prefix = *ip6_prefix; + t->sixrd.ip6_prefix_len = ip6_prefix_len; + t->tunnel_src = src; + t->sixrd.security_check = security_check; + t->sixrd.shift = + (ip4_prefix_len < 32) ? 64 - ip6_prefix_len - (32 - ip4_prefix_len) : 0; + + /* Create interface */ + u32 hw_if_index = + vnet_register_interface (vnet_get_main (), sixrd_device_class.index, + t_idx, + sixrd_hw_interface_class.index, t_idx); + + /* Default the interface to up and enable IPv6 (payload) */ + vnet_hw_interface_t *hi = + vnet_get_hw_interface (vnet_get_main (), hw_if_index); + t->hw_if_index = hw_if_index; + t->fib_index = fib_index; + t->sw_if_index = hi->sw_if_index; + t->dev_instance = t_idx; + t->user_instance = t_idx; + + hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 1480; + + ipip_tunnel_db_add (t, &key); + + vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, hi->sw_if_index, + ~0); + gm->tunnel_index_by_sw_if_index[hi->sw_if_index] = t_idx; + + vnet_hw_interface_set_flags (vnet_get_main (), hw_if_index, + VNET_HW_INTERFACE_FLAG_LINK_UP); + vnet_sw_interface_set_flags (vnet_get_main (), hi->sw_if_index, + VNET_SW_INTERFACE_FLAG_ADMIN_UP); + ip6_sw_interface_enable_disable (hi->sw_if_index, true); + + /* Create IPv6 route/adjacency */ + fib_prefix_t pfx6 = { + .fp_proto = FIB_PROTOCOL_IP6, + .fp_len = t->sixrd.ip6_prefix_len, + .fp_addr = { + .ip6 = t->sixrd.ip6_prefix, + } + , + }; + + fib_table_entry_update_one_path (fib_index, &pfx6, FIB_SOURCE_CLI, + FIB_ENTRY_FLAG_ATTACHED, DPO_PROTO_IP6, + &sixrd_special_nh, hi->sw_if_index, ~0, 1, + NULL, FIB_ROUTE_PATH_FLAG_NONE); + + *sw_if_index = hi->sw_if_index; + + if (!gm->ip4_protocol_registered) + { + vlib_node_t *ipip4_input = + vlib_get_node_by_name (gm->vlib_main, (u8 *) "ipip4-input"); + ASSERT (ipip4_input); + ip4_register_protocol (IP_PROTOCOL_IPV6, ipip4_input->index); + } + return 0; +} + +/* + * sixrd_del_tunnel + */ +int +sixrd_del_tunnel (u32 sw_if_index) +{ + ipip_main_t *gm = &ipip_main; + ipip_tunnel_t *t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index); + + if (!t) + { + clib_warning ("SIXRD tunnel delete: tunnel does not exist: %d", + sw_if_index); + return -1; + } + + fib_prefix_t pfx6 = { + .fp_proto = FIB_PROTOCOL_IP6, + .fp_len = t->sixrd.ip6_prefix_len, + .fp_addr = { + .ip6 = t->sixrd.ip6_prefix, + } + , + }; + fib_table_entry_special_remove (0, &pfx6, FIB_SOURCE_CLI); + vnet_sw_interface_set_flags (vnet_get_main (), t->sw_if_index, + 0 /* down */ ); + ip6_sw_interface_enable_disable (t->sw_if_index, false); + gm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0; + + vnet_delete_hw_interface (vnet_get_main (), t->hw_if_index); + ipip_tunnel_db_remove (t); + pool_put (gm->tunnels, t); + + return 0; +} + +static void +sixrd_adj_delegate_adj_deleted (adj_delegate_t * aed) +{ + sixrd_adj_delegate_t *sixrd_ad; + + sixrd_ad = sixrd_adj_from_base (aed); + fib_entry_child_remove (sixrd_ad->sixrd_fib_entry_index, + sixrd_ad->sixrd_sibling); + fib_table_entry_delete_index (sixrd_ad->sixrd_fib_entry_index, + FIB_SOURCE_RR); + pool_put (sixrd_adj_delegate_pool, sixrd_ad); +} + +static u8 * +sixrd_adj_delegate_format (const adj_delegate_t * aed, u8 * s) +{ + const sixrd_adj_delegate_t *sixrd_ad; + + sixrd_ad = sixrd_adj_from_const_base (aed); + s = format (s, "SIXRD:[fib-entry:%d]", sixrd_ad->sixrd_fib_entry_index); + + return (s); +} + +static void +sixrd_fib_node_last_lock_gone (fib_node_t * node) +{ + /* top of the dependency tree, locks not managed here. */ +} + +static sixrd_adj_delegate_t * +sixrd_adj_delegate_from_fib_node (fib_node_t * node) +{ + return ((sixrd_adj_delegate_t *) (((char *) node) - + STRUCT_OFFSET_OF (sixrd_adj_delegate_t, + sixrd_node))); +} + +static fib_node_back_walk_rc_t +sixrd_fib_node_back_walk_notify (fib_node_t * node, + fib_node_back_walk_ctx_t * ctx) +{ + sixrd_adj_delegate_t *sixrd_ad; + + sixrd_ad = sixrd_adj_delegate_from_fib_node (node); + ip6ip_tunnel_stack (sixrd_ad->adj_index, sixrd_ad->sixrd_fib_entry_index); + + return (FIB_NODE_BACK_WALK_CONTINUE); +} + +/** + * Function definition to get a FIB node from its index + */ +static fib_node_t * +sixrd_fib_node_get (fib_node_index_t index) +{ + sixrd_adj_delegate_t *sixrd_ad; + + sixrd_ad = pool_elt_at_index (sixrd_adj_delegate_pool, index); + + return (&sixrd_ad->sixrd_node); +} + +/** + * VFT registered with the adjacency delegate + */ +const static adj_delegate_vft_t sixrd_adj_delegate_vft = { + .adv_adj_deleted = sixrd_adj_delegate_adj_deleted, + .adv_format = sixrd_adj_delegate_format, +}; + +/** + * VFT registered with the FIB node for the adj delegate + */ +const static fib_node_vft_t sixrd_fib_node_vft = { + .fnv_get = sixrd_fib_node_get, + .fnv_last_lock = sixrd_fib_node_last_lock_gone, + .fnv_back_walk = sixrd_fib_node_back_walk_notify, +}; + +static clib_error_t * +sixrd_init (vlib_main_t * vm) +{ + clib_error_t *error = 0; + + /* Make sure the IPIP tunnel subsystem is initialised */ + vlib_call_init_function (vm, ipip_init); + + sixrd_adj_delegate_type = + adj_delegate_register_new_type (&sixrd_adj_delegate_vft); + sixrd_fib_node_type = fib_node_register_new_type (&sixrd_fib_node_vft); + + return error; +} + +VLIB_INIT_FUNCTION (sixrd_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ipip/sixrd.h b/src/vnet/ipip/sixrd.h new file mode 100644 index 00000000000..f107d5e76cd --- /dev/null +++ b/src/vnet/ipip/sixrd.h @@ -0,0 +1,72 @@ +/*--------------------------------------------------------------------------- + * Copyright (c) 2009-2014 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 agreed 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. + *--------------------------------------------------------------------------- + */ +#include <stdbool.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/ip/ip.h> +#include <vnet/ipip/ipip.h> +#include <vnet/vnet.h> +#include <vppinfra/error.h> + +#define SIXRD_DEFAULT_MTU 1480 /* 1500 - IPv4 header */ + +#define foreach_sixrd_error \ + /* Must be first. */ \ + _(NONE, "valid SIXRD packets") \ + _(BAD_PROTOCOL, "bad protocol") \ + _(SEC_CHECK, "security check failed") \ + _(NO_TUNNEL, "no tunnel") + + +typedef enum +{ +#define _(sym, str) SIXRD_ERROR_##sym, + foreach_sixrd_error +#undef _ + SIXRD_N_ERROR, +} sixrd_error_t; + +extern sixrd_main_t sixrd_main; + +static_always_inline sixrd_tunnel_t * +find_tunnel_by_ip4_address (ip4_address_t * ip) +{ + sixrd_main_t *sm = &sixrd_main; + uword *p; + p = hash_get (sm->tunnel_by_ip, ip->as_u32); + if (!p) + return NULL; + return pool_elt_at_index (sm->tunnels, p[0]); +} + +static_always_inline sixrd_tunnel_t * +ip4_sixrd_get_tunnel (u32 sdi, ip4_address_t * addr, u8 * error) +{ + sixrd_tunnel_t *t = find_tunnel_by_ip4_address (addr); + if (!t) + { + *error = SIXRD_ERROR_NO_TUNNEL; + return NULL; + } + return t; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |