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-rw-r--r--src/plugins/gre/interface.c832
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, &gt->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:
+ */