diff options
Diffstat (limited to 'src/plugins/gre/interface.c')
| -rw-r--r-- | src/plugins/gre/interface.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/src/plugins/gre/interface.c b/src/plugins/gre/interface.c new file mode 100644 index 00000000000..8d93ebd0cf5 --- /dev/null +++ b/src/plugins/gre/interface.c @@ -0,0 +1,832 @@ +/* + * 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 <gre/gre.h> +#include <vnet/ip/format.h> +#include <vnet/fib/fib_table.h> +#include <vnet/adj/adj_midchain.h> +#include <vnet/adj/adj_nbr.h> +#include <vnet/mpls/mpls.h> +#include <vnet/l2/l2_input.h> +#include <vnet/teib/teib.h> + +u8 * +format_gre_tunnel_type (u8 *s, va_list *args) +{ + gre_tunnel_type_t type = va_arg (*args, int); + + switch (type) + { +#define _(n, v) \ + case GRE_TUNNEL_TYPE_##n: \ + s = format (s, "%s", v); \ + break; + foreach_gre_tunnel_type +#undef _ + } + + return (s); +} + +static u8 * +format_gre_tunnel (u8 *s, va_list *args) +{ + gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *); + + 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, IP46_TYPE_ANY, format_ip46_address, + &t->tunnel_dst.fp_addr, IP46_TYPE_ANY, t->outer_fib_index, + t->sw_if_index); + + s = format (s, "payload %U ", format_gre_tunnel_type, t->type); + s = format (s, "%U ", format_tunnel_mode, t->mode); + + if (t->type == GRE_TUNNEL_TYPE_ERSPAN) + s = format (s, "session %d ", t->session_id); + + if (t->type != GRE_TUNNEL_TYPE_L3) + s = format (s, "l2-adj-idx %d ", t->l2_adj_index); + + return s; +} + +static gre_tunnel_t * +gre_tunnel_db_find (const vnet_gre_tunnel_add_del_args_t *a, + u32 outer_fib_index, gre_tunnel_key_t *key) +{ + gre_main_t *gm = &gre_main; + uword *p; + + if (!a->is_ipv6) + { + gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index, a->type, a->mode, + a->session_id, &key->gtk_v4); + p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4); + } + else + { + gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index, a->type, a->mode, + a->session_id, &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; + + if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) + { + hash_set_mem_alloc (&gm->tunnel_by_key6, &key->gtk_v6, t->dev_instance); + } + else + { + hash_set_mem_alloc (&gm->tunnel_by_key4, &key->gtk_v4, t->dev_instance); + } +} + +static void +gre_tunnel_db_remove (gre_tunnel_t *t, gre_tunnel_key_t *key) +{ + gre_main_t *gm = &gre_main; + + if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) + { + hash_unset_mem_free (&gm->tunnel_by_key6, &key->gtk_v6); + } + else + { + hash_unset_mem_free (&gm->tunnel_by_key4, &key->gtk_v4); + } +} + +/** + * 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]); + + if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) & + VNET_HW_INTERFACE_FLAG_LINK_UP) == 0) + { + adj_midchain_delegate_unstack (ai); + } + else + { + adj_midchain_delegate_stack (ai, gt->outer_fib_index, >->tunnel_dst); + } +} + +/** + * mgre_tunnel_stack + * + * 'stack' (resolve the recursion for) the tunnel's midchain adjacency + */ +static void +mgre_tunnel_stack (adj_index_t ai) +{ + gre_main_t *gm = &gre_main; + const ip_adjacency_t *adj; + const 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]); + + if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) & + VNET_HW_INTERFACE_FLAG_LINK_UP) == 0) + { + adj_midchain_delegate_unstack (ai); + } + else + { + const teib_entry_t *ne; + + ne = teib_entry_find_46 (sw_if_index, adj->ia_nh_proto, + &adj->sub_type.nbr.next_hop); + if (NULL != ne) + teib_entry_adj_stack (ne, 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 adj_walk_rc_t +mgre_adj_walk_cb (adj_index_t ai, void *ctx) +{ + mgre_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) + { + switch (gt->mode) + { + case TUNNEL_MODE_P2P: + adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL); + break; + case TUNNEL_MODE_MP: + adj_nbr_walk (gt->sw_if_index, proto, mgre_adj_walk_cb, NULL); + break; + } + } +} + +static void +gre_teib_mk_key (const gre_tunnel_t *t, const teib_entry_t *ne, + gre_tunnel_key_t *key) +{ + const fib_prefix_t *nh; + + nh = teib_entry_get_nh (ne); + + /* construct the key using mode P2P so it can be found in the DP */ + if (FIB_PROTOCOL_IP4 == nh->fp_proto) + gre_mk_key4 (t->tunnel_src.ip4, nh->fp_addr.ip4, + teib_entry_get_fib_index (ne), t->type, TUNNEL_MODE_P2P, 0, + &key->gtk_v4); + else + gre_mk_key6 (&t->tunnel_src.ip6, &nh->fp_addr.ip6, + teib_entry_get_fib_index (ne), t->type, TUNNEL_MODE_P2P, 0, + &key->gtk_v6); +} + +/** + * An TEIB entry has been added + */ +static void +gre_teib_entry_added (const teib_entry_t *ne) +{ + gre_main_t *gm = &gre_main; + const ip_address_t *nh; + gre_tunnel_key_t key; + gre_tunnel_t *t; + u32 sw_if_index; + u32 t_idx; + + sw_if_index = teib_entry_get_sw_if_index (ne); + if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index) + return; + + t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index]; + + if (INDEX_INVALID == t_idx) + return; + + /* entry has been added on an interface for which there is a GRE tunnel */ + t = pool_elt_at_index (gm->tunnels, t_idx); + + if (t->mode != TUNNEL_MODE_MP) + return; + + /* the next-hop (underlay) of the NHRP entry will form part of the key for + * ingress lookup to match packets to this interface */ + gre_teib_mk_key (t, ne, &key); + gre_tunnel_db_add (t, &key); + + /* update the rewrites for each of the adjacencies for this peer (overlay) + * using the next-hop (underlay) */ + mgre_walk_ctx_t ctx = { .t = t, .ne = ne }; + nh = teib_entry_get_peer (ne); + adj_nbr_walk_nh ( + teib_entry_get_sw_if_index (ne), + (AF_IP4 == ip_addr_version (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), + &ip_addr_46 (nh), mgre_mk_complete_walk, &ctx); +} + +static void +gre_teib_entry_deleted (const teib_entry_t *ne) +{ + gre_main_t *gm = &gre_main; + const ip_address_t *nh; + gre_tunnel_key_t key; + gre_tunnel_t *t; + u32 sw_if_index; + u32 t_idx; + + sw_if_index = teib_entry_get_sw_if_index (ne); + if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index) + return; + + t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index]; + + if (INDEX_INVALID == t_idx) + return; + + t = pool_elt_at_index (gm->tunnels, t_idx); + + /* remove the next-hop as an ingress lookup key */ + gre_teib_mk_key (t, ne, &key); + gre_tunnel_db_remove (t, &key); + + nh = teib_entry_get_peer (ne); + + /* make all the adjacencies incomplete */ + adj_nbr_walk_nh ( + teib_entry_get_sw_if_index (ne), + (AF_IP4 == ip_addr_version (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), + &ip_addr_46 (nh), mgre_mk_incomplete_walk, t); +} + +static walk_rc_t +gre_tunnel_delete_teib_walk (index_t nei, void *ctx) +{ + gre_tunnel_t *t = ctx; + gre_tunnel_key_t key; + + gre_teib_mk_key (t, teib_entry_get (nei), &key); + gre_tunnel_db_remove (t, &key); + + return (WALK_CONTINUE); +} + +static walk_rc_t +gre_tunnel_add_teib_walk (index_t nei, void *ctx) +{ + gre_tunnel_t *t = ctx; + gre_tunnel_key_t key = {}; + + gre_teib_mk_key (t, teib_entry_get (nei), &key); + gre_tunnel_db_add (t, &key); + + return (WALK_CONTINUE); +} + +static int +vnet_gre_tunnel_add (vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index, + u32 *sw_if_indexp) +{ + gre_main_t *gm = &gre_main; + vnet_main_t *vnm = gm->vnet_main; + gre_tunnel_t *t; + vnet_hw_interface_t *hi; + u32 hw_if_index, sw_if_index; + u8 is_ipv6 = a->is_ipv6; + gre_tunnel_key_t key; + + t = gre_tunnel_db_find (a, outer_fib_index, &key); + if (NULL != t) + return VNET_API_ERROR_IF_ALREADY_EXISTS; + + pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES); + clib_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 = a->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 */ + + t->type = a->type; + t->mode = a->mode; + t->flags = a->flags; + if (t->type == GRE_TUNNEL_TYPE_ERSPAN) + t->session_id = a->session_id; + + if (t->type == GRE_TUNNEL_TYPE_L3) + { + if (t->mode == TUNNEL_MODE_P2P) + hw_if_index = + vnet_register_interface (vnm, gre_device_class.index, t_idx, + gre_hw_interface_class.index, t_idx); + else + hw_if_index = + vnet_register_interface (vnm, gre_device_class.index, t_idx, + mgre_hw_interface_class.index, t_idx); + } + else + { + vnet_eth_interface_registration_t eir = {}; + + /* Default MAC address (d00b:eed0:0000 + sw_if_index) */ + u8 address[6] = { + 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx + }; + + eir.dev_class_index = gre_device_class.index; + eir.dev_instance = t_idx; + eir.address = address; + hw_if_index = vnet_eth_register_interface (vnm, &eir); + } + + /* Set GRE tunnel interface output node (not used for L3 payload) */ + if (GRE_TUNNEL_TYPE_ERSPAN == t->type) + vnet_set_interface_output_node (vnm, hw_if_index, + gre_erspan_encap_node.index); + else + vnet_set_interface_output_node (vnm, hw_if_index, + gre_teb_encap_node.index); + + 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_idx; + + if (!is_ipv6) + { + hi->frame_overhead = sizeof (gre_header_t) + sizeof (ip4_header_t); + hi->min_frame_size = hi->frame_overhead + 64; + } + else + { + hi->frame_overhead = sizeof (gre_header_t) + sizeof (ip6_header_t); + hi->min_frame_size = hi->frame_overhead + 64; + } + + /* Standard default gre MTU. */ + vnet_sw_interface_set_mtu (vnm, sw_if_index, 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); + + if (t->mode == TUNNEL_MODE_MP) + teib_walk_itf (t->sw_if_index, gre_tunnel_add_teib_walk, t); + + if (t->type == GRE_TUNNEL_TYPE_ERSPAN) + { + gre_sn_key_t skey; + gre_sn_t *gre_sn; + + gre_mk_sn_key (t, &skey); + gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey); + if (gre_sn != NULL) + { + gre_sn->ref_count++; + t->gre_sn = gre_sn; + } + else + { + gre_sn = clib_mem_alloc (sizeof (gre_sn_t)); + gre_sn->seq_num = 0; + gre_sn->ref_count = 1; + t->gre_sn = gre_sn; + hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn); + } + } + + if (t->type != GRE_TUNNEL_TYPE_L3) + { + t->l2_adj_index = adj_nbr_add_or_lock ( + t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index); + vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index, + (u8 *) "tunnel-output-no-count"); + gre_update_adj (vnm, t->sw_if_index, t->l2_adj_index); + } + else + { + vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index, + (u8 *) "tunnel-output"); + } + if (sw_if_indexp) + *sw_if_indexp = sw_if_index; + + /* register gre46-input nodes */ + ip4_register_protocol (IP_PROTOCOL_GRE, gre4_input_node.index); + ip6_register_protocol (IP_PROTOCOL_GRE, gre6_input_node.index); + + return 0; +} + +static int +vnet_gre_tunnel_delete (vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index, + 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, outer_fib_index, &key); + if (NULL == t) + return VNET_API_ERROR_NO_SUCH_ENTRY; + + if (t->mode == TUNNEL_MODE_MP) + teib_walk_itf (t->sw_if_index, gre_tunnel_delete_teib_walk, t); + + 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, + L2_BD_PORT_TYPE_NORMAL, 0, 0); + gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0; + + if (t->type == GRE_TUNNEL_TYPE_L3) + vnet_delete_hw_interface (vnm, t->hw_if_index); + else + ethernet_delete_interface (vnm, t->hw_if_index); + + if (t->l2_adj_index != ADJ_INDEX_INVALID) + { + adj_midchain_delegate_unstack (t->l2_adj_index); + adj_unlock (t->l2_adj_index); + } + + ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL)); + if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1)) + { + gre_sn_key_t skey; + gre_mk_sn_key (t, &skey); + hash_unset_mem_free (&gm->seq_num_by_key, &skey); + clib_mem_free (t->gre_sn); + } + + vnet_reset_interface_l3_output_node (gm->vlib_main, sw_if_index); + hash_unset (gm->instance_used, t->user_instance); + gre_tunnel_db_remove (t, &key); + pool_put (gm->tunnels, t); + + if (sw_if_indexp) + *sw_if_indexp = sw_if_index; + + return 0; +} + +int +vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t *a, u32 *sw_if_indexp) +{ + u32 outer_fib_index; + + outer_fib_index = fib_table_find ( + (a->is_ipv6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4), a->outer_table_id); + + if (~0 == outer_fib_index) + return VNET_API_ERROR_NO_SUCH_FIB; + + if (a->session_id > GTK_SESSION_ID_MAX) + return VNET_API_ERROR_INVALID_SESSION_ID; + + if (a->mode == TUNNEL_MODE_MP && !ip46_address_is_zero (&a->dst)) + return (VNET_API_ERROR_INVALID_DST_ADDRESS); + + if (a->is_add) + return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp)); + else + return (vnet_gre_tunnel_delete (a, outer_fib_index, 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_tunnel_add_del_args_t _a, *a = &_a; + ip46_address_t src = ip46_address_initializer, + dst = ip46_address_initializer; + u32 instance = ~0; + u32 outer_table_id = 0; + gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3; + tunnel_mode_t t_mode = TUNNEL_MODE_P2P; + tunnel_encap_decap_flags_t flags = TUNNEL_ENCAP_DECAP_FLAG_NONE; + u32 session_id = 0; + int rv; + u8 is_add = 1; + u32 sw_if_index; + 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, "del")) + is_add = 0; + else if (unformat (line_input, "instance %d", &instance)) + ; + else if (unformat (line_input, "src %U", unformat_ip46_address, &src)) + ; + else if (unformat (line_input, "dst %U", unformat_ip46_address, &dst)) + ; + else if (unformat (line_input, "outer-table-id %d", &outer_table_id)) + ; + else if (unformat (line_input, "multipoint")) + t_mode = TUNNEL_MODE_MP; + else if (unformat (line_input, "teb")) + t_type = GRE_TUNNEL_TYPE_TEB; + else if (unformat (line_input, "erspan %d", &session_id)) + t_type = GRE_TUNNEL_TYPE_ERSPAN; + else if (unformat (line_input, "flags %U", + unformat_tunnel_encap_decap_flags, &flags)) + ; + else + { + error = clib_error_return (0, "unknown input `%U'", + format_unformat_error, line_input); + goto done; + } + } + + if (ip46_address_is_equal (&src, &dst)) + { + error = clib_error_return (0, "src and dst are identical"); + goto done; + } + + if (t_mode != TUNNEL_MODE_MP && ip46_address_is_zero (&dst)) + { + error = clib_error_return (0, "destination address not specified"); + goto done; + } + + if (ip46_address_is_zero (&src)) + { + error = clib_error_return (0, "source address not specified"); + goto done; + } + + if (ip46_address_is_ip4 (&src) != ip46_address_is_ip4 (&dst)) + { + error = clib_error_return (0, "src and dst address must be the same AF"); + goto done; + } + + clib_memset (a, 0, sizeof (*a)); + a->is_add = is_add; + a->outer_table_id = outer_table_id; + a->type = t_type; + a->mode = t_mode; + a->session_id = session_id; + a->is_ipv6 = !ip46_address_is_ip4 (&src); + a->instance = instance; + a->flags = flags; + clib_memcpy (&a->src, &src, sizeof (a->src)); + clib_memcpy (&a->dst, &dst, sizeof (a->dst)); + + rv = vnet_gre_tunnel_add_del (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_IF_ALREADY_EXISTS: + error = clib_error_return (0, "GRE tunnel already exists..."); + goto done; + case VNET_API_ERROR_NO_SUCH_FIB: + error = clib_error_return (0, "outer table ID %d doesn't exist\n", + outer_table_id); + goto done; + case VNET_API_ERROR_NO_SUCH_ENTRY: + error = clib_error_return (0, "GRE tunnel doesn't exist"); + goto done; + case VNET_API_ERROR_INVALID_SESSION_ID: + error = + clib_error_return (0, "session ID %d out of range\n", session_id); + 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_gre_tunnel_add_del 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> [instance <n>] " + "[outer-fib-id <fib>] [teb | erspan <session-id>] [del] " + "[multipoint]", + .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* */ + +const static teib_vft_t gre_teib_vft = { + .nv_added = gre_teib_entry_added, + .nv_deleted = gre_teib_entry_deleted, +}; + +/* force inclusion from application's main.c */ +clib_error_t * +gre_interface_init (vlib_main_t *vm) +{ + teib_register (&gre_teib_vft); + + return (NULL); +} + +VLIB_INIT_FUNCTION (gre_interface_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |