diff options
Diffstat (limited to 'src/vnet/vxlan/vxlan.c')
| -rw-r--r-- | src/vnet/vxlan/vxlan.c | 899 |
1 files changed, 899 insertions, 0 deletions
diff --git a/src/vnet/vxlan/vxlan.c b/src/vnet/vxlan/vxlan.c new file mode 100644 index 00000000000..abf0182f91f --- /dev/null +++ b/src/vnet/vxlan/vxlan.c @@ -0,0 +1,899 @@ +/* + * 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/dpo/receive_dpo.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 uword +vtep_addr_ref(ip46_address_t *ip) +{ + if (!ip46_address_is_ip4(ip)) + return 1; /* always create */ + uword *pvtep = hash_get (vxlan_main.vtep4, ip->ip4.as_u32); + if (pvtep) + return ++pvtep[0]; + hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1); + return 1; +} + +static uword +vtep_addr_unref(ip46_address_t *ip) +{ + if (!ip46_address_is_ip4(ip)) + return 0; /* alwways destroy */ + uword *pvtep = hash_get (vxlan_main.vtep4, ip->ip4.as_u32); + ASSERT(pvtep); + if (!(--pvtep[0])) + hash_unset (vxlan_main.vtep4, ip->ip4.as_u32); + return pvtep[0]; +} + +static +mcast_remote_t * +mcast_ep_get(ip46_address_t * ip) +{ + ASSERT(ip46_address_is_multicast(ip)); + uword * ep_idx = hash_get_mem (vxlan_main.mcast_ep_by_ip, ip); + ASSERT(ep_idx); + return pool_elt_at_index(vxlan_main.mcast_eps, *ep_idx); +} + +static void +mcast_ep_add(mcast_remote_t * new_ep) +{ + mcast_remote_t * ep; + + pool_get_aligned (vxlan_main.mcast_eps, ep, CLIB_CACHE_LINE_BYTES); + *ep = *new_ep; + hash_set_mem (vxlan_main.mcast_ep_by_ip, &ep->ip, ep - vxlan_main.mcast_eps); +} + +static void +mcast_ep_remove(mcast_remote_t * ep) +{ + hash_unset_mem (vxlan_main.mcast_ep_by_ip, &ep->ip); + pool_put (vxlan_main.mcast_eps, ep); +} + +static void +ip46_multicast_ethernet_address(u8 * ethernet_address, ip46_address_t * ip) { + if (ip46_address_is_ip4(ip)) + ip4_multicast_ethernet_address(ethernet_address, &ip->ip4); + else + ip6_multicast_ethernet_address(ethernet_address, ip->ip6.as_u32[0]); +} + +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 _ + + /* copy the key */ + if (is_ip6) + { + t->key6 = clib_mem_alloc (sizeof(vxlan6_tunnel_key_t)); + clib_memcpy (t->key6, &key6, sizeof(key6)); + } + else + { + t->key4 = 0; /* not yet used */ + } + + if (!is_ip6) + rv = vxlan4_rewrite (t); + else + rv = vxlan6_rewrite (t); + + if (rv) + { + pool_put (vxm->tunnels, t); + return rv; + } + + if (!is_ip6) + hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); + else + hash_set_mem (vxm->vxlan6_tunnel_by_key, t->key6, 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; + dpo_proto_t dproto = fib_proto_to_dpo(fp); + + if (vtep_addr_ref(&t->dst) == 1) + { + u8 mcast_mac[6]; + + ip46_multicast_ethernet_address(mcast_mac, &t->dst); + receive_dpo_add_or_lock(dproto, ~0, NULL, &dpo); + mcast_remote_t new_ep = { + .ip = t->dst, + .mcast_adj_index = adj_rewrite_add_and_lock + (fp, fib_proto_to_link(fp), a->mcast_sw_if_index, mcast_mac), + /* Add VRF local mcast adj. */ + .fib_entry_index = fib_table_entry_special_dpo_add + (t->encap_fib_index, &tun_dst_pfx, + FIB_SOURCE_SPECIAL, FIB_ENTRY_FLAG_NONE, &dpo) + }; + mcast_ep_add(&new_ep); + dpo_reset(&dpo); + } + /* Stack shared mcast dst mac addr rewrite on encap */ + dpo_set (&dpo, DPO_ADJACENCY, dproto, + mcast_ep_get(&t->dst)->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_mem (vxm->vxlan6_tunnel_by_key, t->key6); + clib_mem_free (t->key6); + } + + if (!ip46_address_is_multicast(&t->dst)) + { + vtep_addr_unref(&a->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_remote_t* ep = mcast_ep_get(&t->dst); + adj_unlock(ep->mcast_adj_index); + fib_table_entry_delete_index(ep->fib_entry_index, FIB_SOURCE_SPECIAL); + mcast_ep_remove(ep); + } + + 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* */ + + +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->mcast_ep_by_ip = hash_create_mem(0, + sizeof(ip46_address_t), + sizeof(uword)); + + 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); |