| /* |
| * Copyright (c) 2015 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 <vnet/vxlan/vxlan.h> |
| #include <vnet/ip/format.h> |
| #include <vnet/fib/fib_entry.h> |
| #include <vnet/fib/fib_table.h> |
| #include <vnet/mfib/mfib_table.h> |
| #include <vnet/adj/adj_mcast.h> |
| #include <vlib/vlib.h> |
| |
| /** |
| * @file |
| * @brief VXLAN. |
| * |
| * VXLAN provides the features needed to allow L2 bridge domains (BDs) |
| * to span multiple servers. This is done by building an L2 overlay on |
| * top of an L3 network underlay using VXLAN tunnels. |
| * |
| * This makes it possible for servers to be co-located in the same data |
| * center or be separated geographically as long as they are reachable |
| * through the underlay L3 network. |
| * |
| * You can refer to this kind of L2 overlay bridge domain as a VXLAN |
| * (Virtual eXtensible VLAN) segment. |
| */ |
| |
| |
| vxlan_main_t vxlan_main; |
| |
| static u8 * format_decap_next (u8 * s, va_list * args) |
| { |
| u32 next_index = va_arg (*args, u32); |
| |
| switch (next_index) |
| { |
| case VXLAN_INPUT_NEXT_DROP: |
| return format (s, "drop"); |
| case VXLAN_INPUT_NEXT_L2_INPUT: |
| return format (s, "l2"); |
| default: |
| return format (s, "index %d", next_index); |
| } |
| return s; |
| } |
| |
| u8 * format_vxlan_tunnel (u8 * s, va_list * args) |
| { |
| vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *); |
| vxlan_main_t * ngm = &vxlan_main; |
| |
| s = format (s, "[%d] src %U dst %U vni %d sw_if_index %d ", |
| t - ngm->tunnels, |
| format_ip46_address, &t->src, IP46_TYPE_ANY, |
| format_ip46_address, &t->dst, IP46_TYPE_ANY, |
| t->vni, t->sw_if_index); |
| |
| if (ip46_address_is_multicast (&t->dst)) |
| s = format (s, "mcast_sw_if_index %d ", t->mcast_sw_if_index); |
| |
| s = format (s, "encap_fib_index %d fib_entry_index %d decap_next %U\n", |
| t->encap_fib_index, t->fib_entry_index, |
| format_decap_next, t->decap_next_index); |
| return s; |
| } |
| |
| static u8 * format_vxlan_name (u8 * s, va_list * args) |
| { |
| u32 dev_instance = va_arg (*args, u32); |
| return format (s, "vxlan_tunnel%d", dev_instance); |
| } |
| |
| static uword dummy_interface_tx (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| clib_warning ("you shouldn't be here, leaking buffers..."); |
| return frame->n_vectors; |
| } |
| |
| static clib_error_t * |
| vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) |
| { |
| 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); |
| |
| return /* no error */ 0; |
| } |
| |
| VNET_DEVICE_CLASS (vxlan_device_class,static) = { |
| .name = "VXLAN", |
| .format_device_name = format_vxlan_name, |
| .format_tx_trace = format_vxlan_encap_trace, |
| .tx_function = dummy_interface_tx, |
| .admin_up_down_function = vxlan_interface_admin_up_down, |
| }; |
| |
| static u8 * format_vxlan_header_with_length (u8 * s, va_list * args) |
| { |
| u32 dev_instance = va_arg (*args, u32); |
| s = format (s, "unimplemented dev %u", dev_instance); |
| return s; |
| } |
| |
| VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = { |
| .name = "VXLAN", |
| .format_header = format_vxlan_header_with_length, |
| .build_rewrite = default_build_rewrite, |
| }; |
| |
| static void |
| vxlan_tunnel_restack_dpo(vxlan_tunnel_t * t) |
| { |
| dpo_id_t dpo = DPO_INVALID; |
| u32 encap_index = ip46_address_is_ip4(&t->dst) ? |
| vxlan4_encap_node.index : vxlan6_encap_node.index; |
| fib_forward_chain_type_t forw_type = ip46_address_is_ip4(&t->dst) ? |
| FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6; |
| |
| fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo); |
| dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); |
| dpo_reset(&dpo); |
| } |
| |
| static vxlan_tunnel_t * |
| vxlan_tunnel_from_fib_node (fib_node_t *node) |
| { |
| #if (CLIB_DEBUG > 0) |
| ASSERT(FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type); |
| #endif |
| return ((vxlan_tunnel_t*) (((char*)node) - |
| STRUCT_OFFSET_OF(vxlan_tunnel_t, node))); |
| } |
| |
| /** |
| * Function definition to backwalk a FIB node - |
| * Here we will restack the new dpo of VXLAN DIP to encap node. |
| */ |
| static fib_node_back_walk_rc_t |
| vxlan_tunnel_back_walk (fib_node_t *node, |
| fib_node_back_walk_ctx_t *ctx) |
| { |
| vxlan_tunnel_restack_dpo(vxlan_tunnel_from_fib_node(node)); |
| return (FIB_NODE_BACK_WALK_CONTINUE); |
| } |
| |
| /** |
| * Function definition to get a FIB node from its index |
| */ |
| static fib_node_t* |
| vxlan_tunnel_fib_node_get (fib_node_index_t index) |
| { |
| vxlan_tunnel_t * t; |
| vxlan_main_t * vxm = &vxlan_main; |
| |
| t = pool_elt_at_index(vxm->tunnels, index); |
| |
| return (&t->node); |
| } |
| |
| /** |
| * Function definition to inform the FIB node that its last lock has gone. |
| */ |
| static void |
| vxlan_tunnel_last_lock_gone (fib_node_t *node) |
| { |
| /* |
| * The VXLAN 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 VXLAN tunnels |
| * for participation in the FIB object graph. |
| */ |
| const static fib_node_vft_t vxlan_vft = { |
| .fnv_get = vxlan_tunnel_fib_node_get, |
| .fnv_last_lock = vxlan_tunnel_last_lock_gone, |
| .fnv_back_walk = vxlan_tunnel_back_walk, |
| }; |
| |
| |
| #define foreach_copy_field \ |
| _(vni) \ |
| _(mcast_sw_if_index) \ |
| _(encap_fib_index) \ |
| _(decap_next_index) \ |
| _(src) \ |
| _(dst) |
| |
| static int vxlan4_rewrite (vxlan_tunnel_t * t) |
| { |
| u8 *rw = 0; |
| ip4_header_t * ip0; |
| ip4_vxlan_header_t * h0; |
| int len = sizeof (*h0); |
| |
| vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES); |
| |
| h0 = (ip4_vxlan_header_t *) rw; |
| |
| /* Fixed portion of the (outer) ip4 header */ |
| ip0 = &h0->ip4; |
| ip0->ip_version_and_header_length = 0x45; |
| ip0->ttl = 254; |
| ip0->protocol = IP_PROTOCOL_UDP; |
| |
| /* we fix up the ip4 header length and checksum after-the-fact */ |
| ip0->src_address.as_u32 = t->src.ip4.as_u32; |
| ip0->dst_address.as_u32 = t->dst.ip4.as_u32; |
| ip0->checksum = ip4_header_checksum (ip0); |
| |
| /* UDP header, randomize src port on something, maybe? */ |
| h0->udp.src_port = clib_host_to_net_u16 (4789); |
| h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan); |
| |
| /* VXLAN header */ |
| vnet_set_vni_and_flags(&h0->vxlan, t->vni); |
| |
| t->rewrite = rw; |
| return (0); |
| } |
| |
| static int vxlan6_rewrite (vxlan_tunnel_t * t) |
| { |
| u8 *rw = 0; |
| ip6_header_t * ip0; |
| ip6_vxlan_header_t * h0; |
| int len = sizeof (*h0); |
| |
| vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES); |
| |
| h0 = (ip6_vxlan_header_t *) rw; |
| |
| /* Fixed portion of the (outer) ip6 header */ |
| ip0 = &h0->ip6; |
| ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28); |
| ip0->hop_limit = 255; |
| ip0->protocol = IP_PROTOCOL_UDP; |
| |
| ip0->src_address.as_u64[0] = t->src.ip6.as_u64[0]; |
| ip0->src_address.as_u64[1] = t->src.ip6.as_u64[1]; |
| ip0->dst_address.as_u64[0] = t->dst.ip6.as_u64[0]; |
| ip0->dst_address.as_u64[1] = t->dst.ip6.as_u64[1]; |
| |
| /* UDP header, randomize src port on something, maybe? */ |
| h0->udp.src_port = clib_host_to_net_u16 (4789); |
| h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan); |
| |
| /* VXLAN header */ |
| vnet_set_vni_and_flags(&h0->vxlan, t->vni); |
| |
| t->rewrite = rw; |
| return (0); |
| } |
| |
| static int vxlan_check_decap_next(vxlan_main_t * vxm, u32 is_ip6, u32 decap_next_index) |
| { |
| vlib_main_t * vm = vxm->vlib_main; |
| vlib_node_runtime_t *r; |
| |
| if(!is_ip6) |
| { |
| r = vlib_node_get_runtime (vm, vxlan4_input_node.index); |
| if(decap_next_index >= r->n_next_nodes) |
| return 1; |
| } |
| else |
| { |
| r = vlib_node_get_runtime (vm, vxlan6_input_node.index); |
| if(decap_next_index >= r->n_next_nodes) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void |
| hash_set_key_copy (uword ** h, void * key, uword v) { |
| size_t ksz = hash_header(*h)->user; |
| void * copy = clib_mem_alloc (ksz); |
| clib_memcpy (copy, key, ksz); |
| hash_set_mem (*h, copy, v); |
| } |
| |
| static void |
| hash_unset_key_free (uword ** h, void * key) { |
| hash_pair_t * hp = hash_get_pair_mem (*h, key); |
| ASSERT (hp); |
| key = uword_to_pointer (hp->key, void *); |
| hash_unset_mem (*h, key); |
| clib_mem_free (key); |
| } |
| |
| static uword |
| vtep_addr_ref(ip46_address_t *ip) |
| { |
| uword *vtep = ip46_address_is_ip4(ip) ? |
| hash_get (vxlan_main.vtep4, ip->ip4.as_u32) : |
| hash_get_mem (vxlan_main.vtep6, &ip->ip6); |
| if (vtep) |
| return ++(*vtep); |
| ip46_address_is_ip4(ip) ? |
| hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1) : |
| hash_set_key_copy (&vxlan_main.vtep6, &ip->ip6, 1); |
| return 1; |
| } |
| |
| static uword |
| vtep_addr_unref(ip46_address_t *ip) |
| { |
| uword *vtep = ip46_address_is_ip4(ip) ? |
| hash_get (vxlan_main.vtep4, ip->ip4.as_u32) : |
| hash_get_mem (vxlan_main.vtep6, &ip->ip6); |
| ASSERT(vtep); |
| if (--(*vtep) != 0) |
| return *vtep; |
| ip46_address_is_ip4(ip) ? |
| hash_unset (vxlan_main.vtep4, ip->ip4.as_u32) : |
| hash_unset_key_free (&vxlan_main.vtep6, &ip->ip6); |
| return 0; |
| } |
| |
| typedef CLIB_PACKED(union { |
| struct { |
| fib_node_index_t mfib_entry_index; |
| adj_index_t mcast_adj_index; |
| }; |
| u64 as_u64; |
| }) mcast_shared_t; |
| |
| static inline mcast_shared_t |
| mcast_shared_get(ip46_address_t * ip) |
| { |
| ASSERT(ip46_address_is_multicast(ip)); |
| uword * p = hash_get_mem (vxlan_main.mcast_shared, ip); |
| ASSERT(p); |
| return (mcast_shared_t) { .as_u64 = *p }; |
| } |
| |
| static inline void |
| mcast_shared_add(ip46_address_t *dst, |
| fib_node_index_t mfei, |
| adj_index_t ai) |
| { |
| mcast_shared_t new_ep = { |
| .mcast_adj_index = ai, |
| .mfib_entry_index = mfei, |
| }; |
| |
| hash_set_key_copy (&vxlan_main.mcast_shared, dst, new_ep.as_u64); |
| } |
| |
| static inline void |
| mcast_shared_remove(ip46_address_t *dst) |
| { |
| mcast_shared_t ep = mcast_shared_get(dst); |
| |
| adj_unlock(ep.mcast_adj_index); |
| mfib_table_entry_delete_index(ep.mfib_entry_index, |
| MFIB_SOURCE_VXLAN); |
| |
| hash_unset_key_free (&vxlan_main.mcast_shared, dst); |
| } |
| |
| int vnet_vxlan_add_del_tunnel |
| (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp) |
| { |
| vxlan_main_t * vxm = &vxlan_main; |
| vxlan_tunnel_t *t = 0; |
| vnet_main_t * vnm = vxm->vnet_main; |
| uword * p; |
| u32 hw_if_index = ~0; |
| u32 sw_if_index = ~0; |
| int rv; |
| vxlan4_tunnel_key_t key4; |
| vxlan6_tunnel_key_t key6; |
| u32 is_ip6 = a->is_ip6; |
| |
| if (!is_ip6) |
| { |
| key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */ |
| key4.vni = clib_host_to_net_u32 (a->vni << 8); |
| p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64); |
| } |
| else |
| { |
| key6.src.as_u64[0] = a->dst.ip6.as_u64[0]; |
| key6.src.as_u64[1] = a->dst.ip6.as_u64[1]; |
| key6.vni = clib_host_to_net_u32 (a->vni << 8); |
| p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6); |
| } |
| |
| if (a->is_add) |
| { |
| l2input_main_t * l2im = &l2input_main; |
| |
| /* adding a tunnel: tunnel must not already exist */ |
| if (p) |
| return VNET_API_ERROR_TUNNEL_EXIST; |
| |
| /*if not set explicitly, default to l2 */ |
| if(a->decap_next_index == ~0) |
| a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT; |
| if (vxlan_check_decap_next(vxm, is_ip6, a->decap_next_index)) |
| return VNET_API_ERROR_INVALID_DECAP_NEXT; |
| |
| pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES); |
| memset (t, 0, sizeof (*t)); |
| |
| /* copy from arg structure */ |
| #define _(x) t->x = a->x; |
| foreach_copy_field; |
| #undef _ |
| |
| if (!is_ip6) |
| rv = vxlan4_rewrite (t); |
| else |
| rv = vxlan6_rewrite (t); |
| |
| if (rv) |
| { |
| pool_put (vxm->tunnels, t); |
| return rv; |
| } |
| |
| /* copy the key */ |
| if (is_ip6) |
| hash_set_key_copy (&vxm->vxlan6_tunnel_by_key, &key6, t - vxm->tunnels); |
| else |
| hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); |
| |
| vnet_hw_interface_t * hi; |
| if (vec_len (vxm->free_vxlan_tunnel_hw_if_indices) > 0) |
| { |
| vnet_interface_main_t * im = &vnm->interface_main; |
| hw_if_index = vxm->free_vxlan_tunnel_hw_if_indices |
| [vec_len (vxm->free_vxlan_tunnel_hw_if_indices)-1]; |
| _vec_len (vxm->free_vxlan_tunnel_hw_if_indices) -= 1; |
| |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| hi->dev_instance = t - vxm->tunnels; |
| hi->hw_instance = hi->dev_instance; |
| |
| /* clear old stats of freed tunnel before reuse */ |
| sw_if_index = hi->sw_if_index; |
| vnet_interface_counter_lock(im); |
| vlib_zero_combined_counter |
| (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX], sw_if_index); |
| vlib_zero_combined_counter |
| (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX], sw_if_index); |
| vlib_zero_simple_counter |
| (&im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP], sw_if_index); |
| vnet_interface_counter_unlock(im); |
| } |
| else |
| { |
| hw_if_index = vnet_register_interface |
| (vnm, vxlan_device_class.index, t - vxm->tunnels, |
| vxlan_hw_class.index, t - vxm->tunnels); |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| } |
| |
| t->hw_if_index = hw_if_index; |
| t->sw_if_index = sw_if_index = hi->sw_if_index; |
| |
| vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index, ~0); |
| vxm->tunnel_index_by_sw_if_index[sw_if_index] = t - vxm->tunnels; |
| |
| /* setup l2 input config with l2 feature and bd 0 to drop packet */ |
| vec_validate (l2im->configs, sw_if_index); |
| l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP; |
| l2im->configs[sw_if_index].bd_index = 0; |
| |
| vnet_sw_interface_set_flags (vnm, sw_if_index, |
| VNET_SW_INTERFACE_FLAG_ADMIN_UP); |
| fib_node_init(&t->node, FIB_NODE_TYPE_VXLAN_TUNNEL); |
| fib_prefix_t tun_dst_pfx; |
| u32 encap_index = !is_ip6 ? |
| vxlan4_encap_node.index : vxlan6_encap_node.index; |
| vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL; |
| |
| fib_prefix_from_ip46_addr(&t->dst, &tun_dst_pfx); |
| if (!ip46_address_is_multicast(&t->dst)) |
| { |
| /* Unicast tunnel - |
| * 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 |
| */ |
| vtep_addr_ref(&t->src); |
| t->fib_entry_index = fib_table_entry_special_add |
| (t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR, |
| FIB_ENTRY_FLAG_NONE, ADJ_INDEX_INVALID); |
| t->sibling_index = fib_entry_child_add |
| (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, t - vxm->tunnels); |
| vxlan_tunnel_restack_dpo(t); |
| } |
| else |
| { |
| /* Multicast tunnel - |
| * as the same mcast group can be used for mutiple mcast tunnels |
| * with different VNIs, create the output fib adjecency only if |
| * it does not already exist |
| */ |
| fib_protocol_t fp = (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4; |
| dpo_id_t dpo = DPO_INVALID; |
| mcast_shared_t ep; |
| |
| if (vtep_addr_ref(&t->dst) == 1) |
| { |
| fib_node_index_t mfei; |
| adj_index_t ai; |
| fib_route_path_t path = { |
| .frp_proto = fp, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = 0xffffffff, |
| .frp_fib_index = ~0, |
| .frp_weight = 0, |
| .frp_flags = FIB_ROUTE_PATH_LOCAL, |
| }; |
| const mfib_prefix_t mpfx = { |
| .fp_proto = fp, |
| .fp_len = (is_ip6 ? 128 : 32), |
| .fp_grp_addr = tun_dst_pfx.fp_addr, |
| }; |
| |
| /* |
| * Setup the (*,G) to receive traffic on the mcast group |
| * - the forwarding interface is for-us |
| * - the accepting interface is that from the API |
| */ |
| mfib_table_entry_path_update(t->encap_fib_index, |
| &mpfx, |
| MFIB_SOURCE_VXLAN, |
| &path, |
| MFIB_ITF_FLAG_FORWARD); |
| |
| path.frp_sw_if_index = a->mcast_sw_if_index; |
| path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE; |
| mfei = mfib_table_entry_path_update(t->encap_fib_index, |
| &mpfx, |
| MFIB_SOURCE_VXLAN, |
| &path, |
| MFIB_ITF_FLAG_ACCEPT); |
| |
| /* |
| * Create the mcast adjacency to send traffic to the group |
| */ |
| ai = adj_mcast_add_or_lock(fp, |
| fib_proto_to_link(fp), |
| a->mcast_sw_if_index); |
| |
| /* |
| * create a new end-point |
| */ |
| mcast_shared_add(&t->dst, mfei, ai); |
| } |
| |
| ep = mcast_shared_get(&t->dst); |
| |
| /* Stack shared mcast dst mac addr rewrite on encap */ |
| dpo_set (&dpo, DPO_ADJACENCY, |
| fib_proto_to_dpo(fp), |
| ep.mcast_adj_index); |
| |
| dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); |
| dpo_reset (&dpo); |
| flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER; |
| } |
| |
| /* Set vxlan tunnel output node */ |
| hi->output_node_index = encap_index; |
| |
| vnet_get_sw_interface (vnet_get_main(), sw_if_index)->flood_class = flood_class; |
| } |
| else |
| { |
| /* deleting a tunnel: tunnel must exist */ |
| if (!p) |
| return VNET_API_ERROR_NO_SUCH_ENTRY; |
| |
| t = pool_elt_at_index (vxm->tunnels, p[0]); |
| |
| vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */); |
| /* make sure tunnel is removed from l2 bd or xconnect */ |
| set_int_l2_mode(vxm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0, 0, 0, 0); |
| vec_add1 (vxm->free_vxlan_tunnel_hw_if_indices, t->hw_if_index); |
| |
| vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0; |
| |
| if (!is_ip6) |
| hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64); |
| else |
| hash_unset_key_free (&vxm->vxlan6_tunnel_by_key, &key6); |
| |
| if (!ip46_address_is_multicast(&t->dst)) |
| { |
| vtep_addr_unref(&t->src); |
| fib_entry_child_remove(t->fib_entry_index, t->sibling_index); |
| fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_RR); |
| } |
| else if (vtep_addr_unref(&t->dst) == 0) |
| { |
| mcast_shared_remove(&t->dst); |
| } |
| |
| fib_node_deinit(&t->node); |
| vec_free (t->rewrite); |
| pool_put (vxm->tunnels, t); |
| } |
| |
| if (sw_if_indexp) |
| *sw_if_indexp = sw_if_index; |
| |
| return 0; |
| } |
| |
| static u32 fib4_index_from_fib_id (u32 fib_id) |
| { |
| ip4_main_t * im = &ip4_main; |
| uword * p; |
| |
| p = hash_get (im->fib_index_by_table_id, fib_id); |
| if (!p) |
| return ~0; |
| |
| return p[0]; |
| } |
| |
| static u32 fib6_index_from_fib_id (u32 fib_id) |
| { |
| ip6_main_t * im = &ip6_main; |
| uword * p; |
| |
| p = hash_get (im->fib_index_by_table_id, fib_id); |
| if (!p) |
| return ~0; |
| |
| return p[0]; |
| } |
| |
| static uword get_decap_next_for_node(u32 node_index, u32 ipv4_set) |
| { |
| vxlan_main_t * vxm = &vxlan_main; |
| vlib_main_t * vm = vxm->vlib_main; |
| uword next_index = ~0; |
| |
| if (ipv4_set) |
| { |
| next_index = vlib_node_add_next (vm, vxlan4_input_node.index, node_index); |
| } |
| else |
| { |
| next_index = vlib_node_add_next (vm, vxlan6_input_node.index, node_index); |
| } |
| |
| return next_index; |
| } |
| |
| static uword unformat_decap_next (unformat_input_t * input, va_list * args) |
| { |
| u32 * result = va_arg (*args, u32 *); |
| u32 ipv4_set = va_arg (*args, int); |
| vxlan_main_t * vxm = &vxlan_main; |
| vlib_main_t * vm = vxm->vlib_main; |
| u32 node_index; |
| u32 tmp; |
| |
| if (unformat (input, "l2")) |
| *result = VXLAN_INPUT_NEXT_L2_INPUT; |
| else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index)) |
| *result = get_decap_next_for_node(node_index, ipv4_set); |
| else if (unformat (input, "%d", &tmp)) |
| *result = tmp; |
| else |
| return 0; |
| return 1; |
| } |
| |
| static clib_error_t * |
| vxlan_add_del_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 , dst; |
| u8 is_add = 1; |
| u8 src_set = 0; |
| u8 dst_set = 0; |
| u8 grp_set = 0; |
| u8 ipv4_set = 0; |
| u8 ipv6_set = 0; |
| u32 encap_fib_index = 0; |
| u32 mcast_sw_if_index = ~0; |
| u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT; |
| u32 vni = 0; |
| u32 tmp; |
| int rv; |
| vnet_vxlan_add_del_tunnel_args_t _a, * a = &_a; |
| u32 tunnel_sw_if_index; |
| |
| /* Cant "universally zero init" (={0}) due to GCC bug 53119 */ |
| memset(&src, 0, sizeof src); |
| memset(&dst, 0, sizeof dst); |
| |
| /* 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, "del")) |
| { |
| is_add = 0; |
| } |
| else if (unformat (line_input, "src %U", |
| unformat_ip4_address, &src.ip4)) |
| { |
| src_set = 1; |
| ipv4_set = 1; |
| } |
| else if (unformat (line_input, "dst %U", |
| unformat_ip4_address, &dst.ip4)) |
| { |
| dst_set = 1; |
| ipv4_set = 1; |
| } |
| else if (unformat (line_input, "src %U", |
| unformat_ip6_address, &src.ip6)) |
| { |
| src_set = 1; |
| ipv6_set = 1; |
| } |
| else if (unformat (line_input, "dst %U", |
| unformat_ip6_address, &dst.ip6)) |
| { |
| dst_set = 1; |
| ipv6_set = 1; |
| } |
| else if (unformat (line_input, "group %U %U", |
| unformat_ip4_address, &dst.ip4, |
| unformat_vnet_sw_interface, |
| vnet_get_main(), &mcast_sw_if_index)) |
| { |
| grp_set = dst_set = 1; |
| ipv4_set = 1; |
| } |
| else if (unformat (line_input, "group %U %U", |
| unformat_ip6_address, &dst.ip6, |
| unformat_vnet_sw_interface, |
| vnet_get_main(), &mcast_sw_if_index)) |
| { |
| grp_set = dst_set = 1; |
| ipv6_set = 1; |
| } |
| else if (unformat (line_input, "encap-vrf-id %d", &tmp)) |
| { |
| if (ipv6_set) |
| encap_fib_index = fib6_index_from_fib_id (tmp); |
| else |
| encap_fib_index = fib4_index_from_fib_id (tmp); |
| if (encap_fib_index == ~0) |
| return clib_error_return (0, "nonexistent encap-vrf-id %d", tmp); |
| } |
| else if (unformat (line_input, "decap-next %U", unformat_decap_next, |
| &decap_next_index, ipv4_set)) |
| ; |
| else if (unformat (line_input, "vni %d", &vni)) |
| { |
| if (vni >> 24) |
| return clib_error_return (0, "vni %d out of range", vni); |
| } |
| else |
| return clib_error_return (0, "parse error: '%U'", |
| format_unformat_error, line_input); |
| } |
| |
| unformat_free (line_input); |
| |
| if (src_set == 0) |
| return clib_error_return (0, "tunnel src address not specified"); |
| |
| if (dst_set == 0) |
| return clib_error_return (0, "tunnel dst address not specified"); |
| |
| if (grp_set && !ip46_address_is_multicast(&dst)) |
| return clib_error_return (0, "tunnel group address not multicast"); |
| |
| if (grp_set == 0 && ip46_address_is_multicast(&dst)) |
| return clib_error_return (0, "dst address must be unicast"); |
| |
| if (grp_set && mcast_sw_if_index == ~0) |
| return clib_error_return (0, "tunnel nonexistent multicast device"); |
| |
| if (ipv4_set && ipv6_set) |
| return clib_error_return (0, "both IPv4 and IPv6 addresses specified"); |
| |
| if (ip46_address_cmp(&src, &dst) == 0) |
| return clib_error_return (0, "src and dst addresses are identical"); |
| |
| if (decap_next_index == ~0) |
| return clib_error_return (0, "next node not found"); |
| |
| if (vni == 0) |
| return clib_error_return (0, "vni not specified"); |
| |
| memset (a, 0, sizeof (*a)); |
| |
| a->is_add = is_add; |
| a->is_ip6 = ipv6_set; |
| |
| #define _(x) a->x = x; |
| foreach_copy_field; |
| #undef _ |
| |
| rv = vnet_vxlan_add_del_tunnel (a, &tunnel_sw_if_index); |
| |
| switch(rv) |
| { |
| case 0: |
| if (is_add) |
| vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, |
| vnet_get_main(), tunnel_sw_if_index); |
| break; |
| |
| case VNET_API_ERROR_TUNNEL_EXIST: |
| return clib_error_return (0, "tunnel already exists..."); |
| |
| case VNET_API_ERROR_NO_SUCH_ENTRY: |
| return clib_error_return (0, "tunnel does not exist..."); |
| |
| default: |
| return clib_error_return |
| (0, "vnet_vxlan_add_del_tunnel returned %d", rv); |
| } |
| |
| return 0; |
| } |
| |
| /*? |
| * Add or delete a VXLAN Tunnel. |
| * |
| * VXLAN provides the features needed to allow L2 bridge domains (BDs) |
| * to span multiple servers. This is done by building an L2 overlay on |
| * top of an L3 network underlay using VXLAN tunnels. |
| * |
| * This makes it possible for servers to be co-located in the same data |
| * center or be separated geographically as long as they are reachable |
| * through the underlay L3 network. |
| * |
| * You can refer to this kind of L2 overlay bridge domain as a VXLAN |
| * (Virtual eXtensible VLAN) segment. |
| * |
| * @cliexpar |
| * Example of how to create a VXLAN Tunnel: |
| * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id 7} |
| * Example of how to delete a VXLAN Tunnel: |
| * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del} |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = { |
| .path = "create vxlan tunnel", |
| .short_help = |
| "create vxlan tunnel src <local-vtep-addr>" |
| " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>" |
| " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]", |
| .function = vxlan_add_del_tunnel_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| show_vxlan_tunnel_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| vxlan_main_t * vxm = &vxlan_main; |
| vxlan_tunnel_t * t; |
| |
| if (pool_elts (vxm->tunnels) == 0) |
| vlib_cli_output (vm, "No vxlan tunnels configured..."); |
| |
| pool_foreach (t, vxm->tunnels, |
| ({ |
| vlib_cli_output (vm, "%U", format_vxlan_tunnel, t); |
| })); |
| |
| return 0; |
| } |
| |
| /*? |
| * Display all the VXLAN Tunnel entries. |
| * |
| * @cliexpar |
| * Example of how to display the VXLAN Tunnel entries: |
| * @cliexstart{show vxlan tunnel} |
| * [0] src 10.0.3.1 dst 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2 |
| * @cliexend |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = { |
| .path = "show vxlan tunnel", |
| .short_help = "show vxlan tunnel", |
| .function = show_vxlan_tunnel_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| |
| void vnet_int_vxlan_bypass_mode (u32 sw_if_index, |
| u8 is_ip6, |
| u8 is_enable) |
| { |
| if (is_ip6) |
| vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass", |
| sw_if_index, is_enable, 0, 0); |
| else |
| vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", |
| sw_if_index, is_enable, 0, 0); |
| } |
| |
| |
| static clib_error_t * |
| set_ip_vxlan_bypass (u32 is_ip6, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| unformat_input_t _line_input, * line_input = &_line_input; |
| vnet_main_t * vnm = vnet_get_main(); |
| clib_error_t * error = 0; |
| u32 sw_if_index, is_enable; |
| |
| sw_if_index = ~0; |
| is_enable = 1; |
| |
| if (! unformat_user (input, unformat_line_input, line_input)) |
| return 0; |
| |
| while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index)) |
| ; |
| else if (unformat (line_input, "del")) |
| is_enable = 0; |
| else |
| { |
| error = unformat_parse_error (line_input); |
| goto done; |
| } |
| } |
| |
| if (~0 == sw_if_index) |
| { |
| error = clib_error_return (0, "unknown interface `%U'", |
| format_unformat_error, line_input); |
| goto done; |
| } |
| |
| vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable); |
| |
| done: |
| return error; |
| } |
| |
| static clib_error_t * |
| set_ip4_vxlan_bypass (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| return set_ip_vxlan_bypass (0, input, cmd); |
| } |
| |
| /*? |
| * This command adds the 'ip4-vxlan-bypass' graph node for a given interface. |
| * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks |
| * for and validate input vxlan packet and bypass ip4-lookup, ip4-local, |
| * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will |
| * cause extra overhead to for non-vxlan packets which is kept at a minimum. |
| * |
| * @cliexpar |
| * @parblock |
| * Example of graph node before ip4-vxlan-bypass is enabled: |
| * @cliexstart{show vlib graph ip4-vxlan-bypass} |
| * Name Next Previous |
| * ip4-vxlan-bypass error-drop [0] |
| * vxlan4-input [1] |
| * ip4-lookup [2] |
| * @cliexend |
| * |
| * Example of how to enable ip4-vxlan-bypass on an interface: |
| * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0} |
| * |
| * Example of graph node after ip4-vxlan-bypass is enabled: |
| * @cliexstart{show vlib graph ip4-vxlan-bypass} |
| * Name Next Previous |
| * ip4-vxlan-bypass error-drop [0] ip4-input |
| * vxlan4-input [1] ip4-input-no-checksum |
| * ip4-lookup [2] |
| * @cliexend |
| * |
| * Example of how to display the feature enabed on an interface: |
| * @cliexstart{show ip interface features GigabitEthernet2/0/0} |
| * IP feature paths configured on GigabitEthernet2/0/0... |
| * ... |
| * ipv4 unicast: |
| * ip4-vxlan-bypass |
| * ip4-lookup |
| * ... |
| * @cliexend |
| * |
| * Example of how to disable ip4-vxlan-bypass on an interface: |
| * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del} |
| * @endparblock |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = { |
| .path = "set interface ip vxlan-bypass", |
| .function = set_ip4_vxlan_bypass, |
| .short_help = "set interface ip vxlan-bypass <interface> [del]", |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| set_ip6_vxlan_bypass (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| return set_ip_vxlan_bypass (1, input, cmd); |
| } |
| |
| /*? |
| * This command adds the 'ip6-vxlan-bypass' graph node for a given interface. |
| * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks |
| * for and validate input vxlan packet and bypass ip6-lookup, ip6-local, |
| * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will |
| * cause extra overhead to for non-vxlan packets which is kept at a minimum. |
| * |
| * @cliexpar |
| * @parblock |
| * Example of graph node before ip6-vxlan-bypass is enabled: |
| * @cliexstart{show vlib graph ip6-vxlan-bypass} |
| * Name Next Previous |
| * ip6-vxlan-bypass error-drop [0] |
| * vxlan6-input [1] |
| * ip6-lookup [2] |
| * @cliexend |
| * |
| * Example of how to enable ip6-vxlan-bypass on an interface: |
| * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0} |
| * |
| * Example of graph node after ip6-vxlan-bypass is enabled: |
| * @cliexstart{show vlib graph ip6-vxlan-bypass} |
| * Name Next Previous |
| * ip6-vxlan-bypass error-drop [0] ip6-input |
| * vxlan6-input [1] ip4-input-no-checksum |
| * ip6-lookup [2] |
| * @cliexend |
| * |
| * Example of how to display the feature enabed on an interface: |
| * @cliexstart{show ip interface features GigabitEthernet2/0/0} |
| * IP feature paths configured on GigabitEthernet2/0/0... |
| * ... |
| * ipv6 unicast: |
| * ip6-vxlan-bypass |
| * ip6-lookup |
| * ... |
| * @cliexend |
| * |
| * Example of how to disable ip6-vxlan-bypass on an interface: |
| * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del} |
| * @endparblock |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = { |
| .path = "set interface ip6 vxlan-bypass", |
| .function = set_ip6_vxlan_bypass, |
| .short_help = "set interface ip vxlan-bypass <interface> [del]", |
| }; |
| /* *INDENT-ON* */ |
| |
| clib_error_t *vxlan_init (vlib_main_t *vm) |
| { |
| vxlan_main_t * vxm = &vxlan_main; |
| |
| vxm->vnet_main = vnet_get_main(); |
| vxm->vlib_main = vm; |
| |
| /* initialize the ip6 hash */ |
| vxm->vxlan6_tunnel_by_key = hash_create_mem(0, |
| sizeof(vxlan6_tunnel_key_t), |
| sizeof(uword)); |
| vxm->vtep6 = hash_create_mem(0, |
| sizeof(ip6_address_t), |
| sizeof(uword)); |
| vxm->mcast_shared = hash_create_mem(0, |
| sizeof(ip46_address_t), |
| sizeof(mcast_shared_t)); |
| |
| udp_register_dst_port (vm, UDP_DST_PORT_vxlan, |
| vxlan4_input_node.index, /* is_ip4 */ 1); |
| udp_register_dst_port (vm, UDP_DST_PORT_vxlan6, |
| vxlan6_input_node.index, /* is_ip4 */ 0); |
| |
| fib_node_register_type(FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft); |
| |
| return 0; |
| } |
| |
| VLIB_INIT_FUNCTION(vxlan_init); |