| /* |
| * gre_interface.c: gre interfaces |
| * |
| * Copyright (c) 2012 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/vnet.h> |
| #include <vnet/pg/pg.h> |
| #include <vnet/gre/gre.h> |
| #include <vnet/ip/format.h> |
| #include <vnet/fib/ip4_fib.h> |
| #include <vnet/fib/ip6_fib.h> |
| #include <vnet/adj/adj_midchain.h> |
| #include <vnet/adj/adj_nbr.h> |
| #include <vnet/mpls/mpls.h> |
| |
| static const char *gre_tunnel_type_names[] = GRE_TUNNEL_TYPE_NAMES; |
| |
| static u8 * |
| format_gre_tunnel_type (u8 * s, va_list * args) |
| { |
| gre_tunnel_type_t type = va_arg (*args, gre_tunnel_type_t); |
| |
| return (format (s, "%s", gre_tunnel_type_names[type])); |
| } |
| |
| static u8 * |
| format_gre_tunnel (u8 * s, va_list * args) |
| { |
| gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *); |
| gre_main_t *gm = &gre_main; |
| u8 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0; |
| |
| if (!is_ipv6) |
| s = format (s, |
| "[%d] %U (src) %U (dst) payload %U outer_fib_index %d", |
| t - gm->tunnels, |
| format_ip4_address, &t->tunnel_src.ip4, |
| format_ip4_address, &t->tunnel_dst.fp_addr.ip4, |
| format_gre_tunnel_type, t->type, t->outer_fib_index); |
| else |
| s = format (s, |
| "[%d] %U (src) %U (dst) payload %U outer_fib_index %d", |
| t - gm->tunnels, |
| format_ip6_address, &t->tunnel_src.ip6, |
| format_ip6_address, &t->tunnel_dst.fp_addr.ip6, |
| format_gre_tunnel_type, t->type, t->outer_fib_index); |
| |
| return s; |
| } |
| |
| static gre_tunnel_t * |
| gre_tunnel_db_find (const ip46_address_t * src, |
| const ip46_address_t * dst, |
| u32 out_fib_index, u8 is_ipv6, gre_tunnel_key_t * key) |
| { |
| gre_main_t *gm = &gre_main; |
| uword *p; |
| |
| if (!is_ipv6) |
| { |
| gre_mk_key4 (&src->ip4, &dst->ip4, out_fib_index, &key->gtk_v4); |
| p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4); |
| } |
| else |
| { |
| gre_mk_key6 (&src->ip6, &dst->ip6, out_fib_index, &key->gtk_v6); |
| p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6); |
| } |
| |
| if (NULL == p) |
| return (NULL); |
| |
| return (pool_elt_at_index (gm->tunnels, p[0])); |
| } |
| |
| static void |
| gre_tunnel_db_add (gre_tunnel_t * t, gre_tunnel_key_t * key) |
| { |
| gre_main_t *gm = &gre_main; |
| |
| t->key = clib_mem_alloc (sizeof (*t->key)); |
| clib_memcpy (t->key, key, sizeof (*key)); |
| |
| if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) |
| { |
| hash_set_mem (gm->tunnel_by_key6, &t->key->gtk_v6, t - gm->tunnels); |
| } |
| else |
| { |
| hash_set_mem (gm->tunnel_by_key4, &t->key->gtk_v4, t - gm->tunnels); |
| } |
| } |
| |
| static void |
| gre_tunnel_db_remove (gre_tunnel_t * t) |
| { |
| gre_main_t *gm = &gre_main; |
| |
| if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) |
| { |
| hash_unset_mem (gm->tunnel_by_key6, &t->key->gtk_v6); |
| } |
| else |
| { |
| hash_unset_mem (gm->tunnel_by_key4, &t->key->gtk_v4); |
| } |
| |
| clib_mem_free (t->key); |
| t->key = NULL; |
| } |
| |
| static gre_tunnel_t * |
| gre_tunnel_from_fib_node (fib_node_t * node) |
| { |
| ASSERT (FIB_NODE_TYPE_GRE_TUNNEL == node->fn_type); |
| return ((gre_tunnel_t *) (((char *) node) - |
| STRUCT_OFFSET_OF (gre_tunnel_t, node))); |
| } |
| |
| /** |
| * gre_tunnel_stack |
| * |
| * 'stack' (resolve the recursion for) the tunnel's midchain adjacency |
| */ |
| void |
| gre_tunnel_stack (adj_index_t ai) |
| { |
| gre_main_t *gm = &gre_main; |
| ip_adjacency_t *adj; |
| gre_tunnel_t *gt; |
| u32 sw_if_index; |
| |
| adj = adj_get (ai); |
| sw_if_index = adj->rewrite_header.sw_if_index; |
| |
| if ((vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index) || |
| (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index])) |
| return; |
| |
| gt = pool_elt_at_index (gm->tunnels, |
| gm->tunnel_index_by_sw_if_index[sw_if_index]); |
| |
| /* |
| * find the adjacency that is contributed by the FIB entry |
| * that this tunnel resovles via, and use it as the next adj |
| * in the midchain |
| */ |
| if (vnet_hw_interface_get_flags (vnet_get_main (), |
| gt->hw_if_index) & |
| VNET_HW_INTERFACE_FLAG_LINK_UP) |
| { |
| adj_nbr_midchain_stack (ai, |
| fib_entry_contribute_ip_forwarding |
| (gt->fib_entry_index)); |
| } |
| else |
| { |
| adj_nbr_midchain_unstack (ai); |
| } |
| } |
| |
| /** |
| * @brief Call back when restacking all adjacencies on a GRE interface |
| */ |
| static adj_walk_rc_t |
| gre_adj_walk_cb (adj_index_t ai, void *ctx) |
| { |
| gre_tunnel_stack (ai); |
| |
| return (ADJ_WALK_RC_CONTINUE); |
| } |
| |
| static void |
| gre_tunnel_restack (gre_tunnel_t * gt) |
| { |
| fib_protocol_t proto; |
| |
| /* |
| * walk all the adjacencies on th GRE interface and restack them |
| */ |
| FOR_EACH_FIB_IP_PROTOCOL (proto) |
| { |
| adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL); |
| } |
| } |
| |
| /** |
| * Function definition to backwalk a FIB node |
| */ |
| static fib_node_back_walk_rc_t |
| gre_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) |
| { |
| gre_tunnel_restack (gre_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 * |
| gre_tunnel_fib_node_get (fib_node_index_t index) |
| { |
| gre_tunnel_t *gt; |
| gre_main_t *gm; |
| |
| gm = &gre_main; |
| gt = pool_elt_at_index (gm->tunnels, index); |
| |
| return (>->node); |
| } |
| |
| /** |
| * Function definition to inform the FIB node that its last lock has gone. |
| */ |
| static void |
| gre_tunnel_last_lock_gone (fib_node_t * node) |
| { |
| /* |
| * The MPLS GRE 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 MPLS GRE tunnels |
| * for participation in the FIB object graph. |
| */ |
| const static fib_node_vft_t gre_vft = { |
| .fnv_get = gre_tunnel_fib_node_get, |
| .fnv_last_lock = gre_tunnel_last_lock_gone, |
| .fnv_back_walk = gre_tunnel_back_walk, |
| }; |
| |
| static int |
| vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a, u32 * sw_if_indexp) |
| { |
| gre_main_t *gm = &gre_main; |
| vnet_main_t *vnm = gm->vnet_main; |
| ip4_main_t *im4 = &ip4_main; |
| ip6_main_t *im6 = &ip6_main; |
| gre_tunnel_t *t; |
| vnet_hw_interface_t *hi; |
| u32 hw_if_index, sw_if_index; |
| u32 outer_fib_index; |
| u8 address[6]; |
| clib_error_t *error; |
| u8 is_ipv6 = a->is_ipv6; |
| gre_tunnel_key_t key; |
| |
| if (!is_ipv6) |
| outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id); |
| else |
| outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id); |
| |
| if (~0 == outer_fib_index) |
| return VNET_API_ERROR_NO_SUCH_FIB; |
| |
| t = |
| gre_tunnel_db_find (&a->src, &a->dst, a->outer_fib_id, a->is_ipv6, &key); |
| |
| if (NULL != t) |
| return VNET_API_ERROR_INVALID_VALUE; |
| |
| pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES); |
| memset (t, 0, sizeof (*t)); |
| fib_node_init (&t->node, FIB_NODE_TYPE_GRE_TUNNEL); |
| |
| if (a->teb) |
| t->type = GRE_TUNNEL_TYPE_TEB; |
| else |
| t->type = GRE_TUNNEL_TYPE_L3; |
| |
| if (vec_len (gm->free_gre_tunnel_hw_if_indices[t->type]) > 0) |
| { |
| vnet_interface_main_t *im = &vnm->interface_main; |
| |
| hw_if_index = gm->free_gre_tunnel_hw_if_indices[t->type] |
| [vec_len (gm->free_gre_tunnel_hw_if_indices[t->type]) - 1]; |
| _vec_len (gm->free_gre_tunnel_hw_if_indices[t->type]) -= 1; |
| |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| hi->dev_instance = t - gm->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); |
| if (GRE_TUNNEL_TYPE_TEB == t->type) |
| { |
| t->l2_tx_arc = vlib_node_add_named_next (vlib_get_main (), |
| hi->tx_node_index, |
| "adj-l2-midchain"); |
| } |
| } |
| else |
| { |
| if (GRE_TUNNEL_TYPE_TEB == t->type) |
| { |
| /* Default MAC address (d00b:eed0:0000 + sw_if_index) */ |
| memset (address, 0, sizeof (address)); |
| address[0] = 0xd0; |
| address[1] = 0x0b; |
| address[2] = 0xee; |
| address[3] = 0xd0; |
| address[4] = t - gm->tunnels; |
| |
| error = ethernet_register_interface (vnm, |
| gre_device_teb_class.index, |
| t - gm->tunnels, address, |
| &hw_if_index, 0); |
| |
| if (error) |
| { |
| clib_error_report (error); |
| return VNET_API_ERROR_INVALID_REGISTRATION; |
| } |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| |
| t->l2_tx_arc = vlib_node_add_named_next (vlib_get_main (), |
| hi->tx_node_index, |
| "adj-l2-midchain"); |
| } |
| else |
| { |
| hw_if_index = vnet_register_interface (vnm, |
| gre_device_class.index, |
| t - gm->tunnels, |
| gre_hw_interface_class.index, |
| t - gm->tunnels); |
| } |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| sw_if_index = hi->sw_if_index; |
| } |
| |
| t->hw_if_index = hw_if_index; |
| t->outer_fib_index = outer_fib_index; |
| t->sw_if_index = sw_if_index; |
| t->l2_adj_index = ADJ_INDEX_INVALID; |
| |
| 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 - gm->tunnels; |
| |
| if (!is_ipv6) |
| { |
| vec_validate (im4->fib_index_by_sw_if_index, sw_if_index); |
| hi->min_packet_bytes = |
| 64 + sizeof (gre_header_t) + sizeof (ip4_header_t); |
| } |
| else |
| { |
| vec_validate (im6->fib_index_by_sw_if_index, sw_if_index); |
| hi->min_packet_bytes = |
| 64 + sizeof (gre_header_t) + sizeof (ip6_header_t); |
| } |
| |
| hi->per_packet_overhead_bytes = |
| /* preamble */ 8 + /* inter frame gap */ 12; |
| |
| /* Standard default gre MTU. */ |
| hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000; |
| |
| /* |
| * 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 |
| */ |
| |
| clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src)); |
| t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128; |
| t->tunnel_dst.fp_proto = !is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; |
| t->tunnel_dst.fp_addr = a->dst; |
| |
| gre_tunnel_db_add (t, &key); |
| |
| t->fib_entry_index = |
| fib_table_entry_special_add (outer_fib_index, |
| &t->tunnel_dst, |
| FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE); |
| t->sibling_index = |
| fib_entry_child_add (t->fib_entry_index, |
| FIB_NODE_TYPE_GRE_TUNNEL, t - gm->tunnels); |
| |
| if (GRE_TUNNEL_TYPE_TEB == t->type) |
| { |
| t->l2_adj_index = adj_nbr_add_or_lock (t->tunnel_dst.fp_proto, |
| VNET_LINK_ETHERNET, |
| &zero_addr, sw_if_index); |
| gre_update_adj (vnm, t->sw_if_index, t->l2_adj_index); |
| } |
| |
| if (sw_if_indexp) |
| *sw_if_indexp = sw_if_index; |
| |
| return 0; |
| } |
| |
| static int |
| vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a, |
| u32 * sw_if_indexp) |
| { |
| gre_main_t *gm = &gre_main; |
| vnet_main_t *vnm = gm->vnet_main; |
| gre_tunnel_t *t; |
| gre_tunnel_key_t key; |
| u32 sw_if_index; |
| |
| t = |
| gre_tunnel_db_find (&a->src, &a->dst, a->outer_fib_id, a->is_ipv6, &key); |
| |
| if (NULL == t) |
| return VNET_API_ERROR_NO_SUCH_ENTRY; |
| |
| sw_if_index = t->sw_if_index; |
| vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ ); |
| /* make sure tunnel is removed from l2 bd or xconnect */ |
| set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0); |
| vec_add1 (gm->free_gre_tunnel_hw_if_indices[t->type], t->hw_if_index); |
| gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0; |
| |
| if (GRE_TUNNEL_TYPE_TEB == t->type) |
| adj_unlock (t->l2_adj_index); |
| |
| if (t->l2_adj_index != ADJ_INDEX_INVALID) |
| adj_unlock (t->l2_adj_index); |
| |
| fib_entry_child_remove (t->fib_entry_index, t->sibling_index); |
| fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR); |
| |
| gre_tunnel_db_remove (t); |
| fib_node_deinit (&t->node); |
| pool_put (gm->tunnels, t); |
| |
| if (sw_if_indexp) |
| *sw_if_indexp = sw_if_index; |
| |
| return 0; |
| } |
| |
| int |
| vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t * a, |
| u32 * sw_if_indexp) |
| { |
| if (a->is_add) |
| return (vnet_gre_tunnel_add (a, sw_if_indexp)); |
| else |
| return (vnet_gre_tunnel_delete (a, sw_if_indexp)); |
| } |
| |
| clib_error_t * |
| gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) |
| { |
| gre_main_t *gm = &gre_main; |
| vnet_hw_interface_t *hi; |
| gre_tunnel_t *t; |
| u32 ti; |
| |
| hi = vnet_get_hw_interface (vnm, hw_if_index); |
| |
| if (NULL == gm->tunnel_index_by_sw_if_index || |
| hi->sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index)) |
| return (NULL); |
| |
| ti = gm->tunnel_index_by_sw_if_index[hi->sw_if_index]; |
| |
| if (~0 == ti) |
| /* not one of ours */ |
| return (NULL); |
| |
| t = pool_elt_at_index (gm->tunnels, ti); |
| |
| 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 */ ); |
| |
| gre_tunnel_restack (t); |
| |
| return /* no error */ 0; |
| } |
| |
| static clib_error_t * |
| create_gre_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; |
| vnet_gre_add_del_tunnel_args_t _a, *a = &_a; |
| ip46_address_t src, dst; |
| u32 outer_fib_id = 0; |
| u8 teb = 0; |
| int rv; |
| u32 num_m_args = 0; |
| u8 is_add = 1; |
| u32 sw_if_index; |
| clib_error_t *error = NULL; |
| u8 ipv4_set = 0; |
| u8 ipv6_set = 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, "del")) |
| is_add = 0; |
| else |
| if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4)) |
| { |
| num_m_args++; |
| ipv4_set = 1; |
| } |
| else |
| if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4)) |
| { |
| num_m_args++; |
| ipv4_set = 1; |
| } |
| else |
| if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6)) |
| { |
| num_m_args++; |
| ipv6_set = 1; |
| } |
| else |
| if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6)) |
| { |
| num_m_args++; |
| ipv6_set = 1; |
| } |
| else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id)) |
| ; |
| else if (unformat (line_input, "teb")) |
| teb = 1; |
| 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 ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) || |
| (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0)) |
| { |
| error = clib_error_return (0, "src and dst are identical"); |
| goto done; |
| } |
| |
| if (ipv4_set && ipv6_set) |
| return clib_error_return (0, "both IPv4 and IPv6 addresses specified"); |
| |
| if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0) |
| || (ipv6_set |
| && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0)) |
| { |
| error = clib_error_return (0, "dst address cannot be zero"); |
| goto done; |
| } |
| |
| memset (a, 0, sizeof (*a)); |
| a->outer_fib_id = outer_fib_id; |
| a->teb = teb; |
| a->is_ipv6 = ipv6_set; |
| if (!ipv6_set) |
| { |
| clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4)); |
| clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4)); |
| } |
| else |
| { |
| clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6)); |
| clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6)); |
| } |
| |
| if (is_add) |
| rv = vnet_gre_tunnel_add (a, &sw_if_index); |
| else |
| rv = vnet_gre_tunnel_delete (a, &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_INVALID_VALUE: |
| error = clib_error_return (0, "GRE 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", |
| outer_fib_id); |
| goto done; |
| default: |
| error = |
| clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv); |
| goto done; |
| } |
| |
| done: |
| unformat_free (line_input); |
| |
| return error; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = { |
| .path = "create gre tunnel", |
| .short_help = "create gre tunnel src <addr> dst <addr> " |
| "[outer-fib-id <fib>] [teb] [del]", |
| .function = create_gre_tunnel_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| show_gre_tunnel_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| gre_main_t *gm = &gre_main; |
| gre_tunnel_t *t; |
| u32 ti = ~0; |
| |
| if (pool_elts (gm->tunnels) == 0) |
| vlib_cli_output (vm, "No GRE tunnels configured..."); |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "%d", &ti)) |
| ; |
| else |
| break; |
| } |
| |
| if (~0 == ti) |
| { |
| /* *INDENT-OFF* */ |
| pool_foreach (t, gm->tunnels, |
| ({ |
| vlib_cli_output (vm, "%U", format_gre_tunnel, t); |
| })); |
| /* *INDENT-ON* */ |
| } |
| else |
| { |
| t = pool_elt_at_index (gm->tunnels, ti); |
| |
| vlib_cli_output (vm, "%U", format_gre_tunnel, t); |
| } |
| |
| return 0; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = { |
| .path = "show gre tunnel", |
| .function = show_gre_tunnel_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* force inclusion from application's main.c */ |
| clib_error_t * |
| gre_interface_init (vlib_main_t * vm) |
| { |
| fib_node_register_type (FIB_NODE_TYPE_GRE_TUNNEL, &gre_vft); |
| |
| return 0; |
| } |
| |
| VLIB_INIT_FUNCTION (gre_interface_init); |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |