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-rw-r--r--src/vnet/ip/lookup.c1442
1 files changed, 1442 insertions, 0 deletions
diff --git a/src/vnet/ip/lookup.c b/src/vnet/ip/lookup.c
new file mode 100644
index 00000000..856c4942
--- /dev/null
+++ b/src/vnet/ip/lookup.c
@@ -0,0 +1,1442 @@
+/*
+ * 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.
+ */
+/*
+ * ip/ip_lookup.c: ip4/6 adjacency and lookup table managment
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/ip/ip.h>
+#include <vnet/adj/adj.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/mpls/mpls.h>
+#include <vnet/mfib/mfib_table.h>
+#include <vnet/dpo/drop_dpo.h>
+#include <vnet/dpo/classify_dpo.h>
+#include <vnet/dpo/punt_dpo.h>
+#include <vnet/dpo/receive_dpo.h>
+#include <vnet/dpo/ip_null_dpo.h>
+#include <vnet/ip/ip6_neighbor.h>
+
+/**
+ * @file
+ * @brief IPv4 and IPv6 adjacency and lookup table managment.
+ *
+ */
+
+clib_error_t *
+ip_interface_address_add_del (ip_lookup_main_t * lm,
+ u32 sw_if_index,
+ void *addr_fib,
+ u32 address_length,
+ u32 is_del, u32 * result_if_address_index)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip_interface_address_t *a, *prev, *next;
+ uword *p = mhash_get (&lm->address_to_if_address_index, addr_fib);
+
+ vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+ a = p ? pool_elt_at_index (lm->if_address_pool, p[0]) : 0;
+
+ /* Verify given length. */
+ if ((a && (address_length != a->address_length)) ||
+ (address_length == 0) ||
+ (lm->is_ip6 && address_length > 128) ||
+ (!lm->is_ip6 && address_length > 32))
+ {
+ vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
+ return clib_error_create
+ ("%U wrong length (expected %d) for interface %U",
+ lm->format_address_and_length, addr_fib,
+ address_length, a ? a->address_length : -1,
+ format_vnet_sw_if_index_name, vnm, sw_if_index);
+ }
+
+ if (is_del)
+ {
+ if (!a)
+ {
+ vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+ vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
+ return clib_error_create ("%U not found for interface %U",
+ lm->format_address_and_length,
+ addr_fib, address_length,
+ format_vnet_sw_interface_name, vnm, si);
+ }
+
+ if (a->prev_this_sw_interface != ~0)
+ {
+ prev =
+ pool_elt_at_index (lm->if_address_pool,
+ a->prev_this_sw_interface);
+ prev->next_this_sw_interface = a->next_this_sw_interface;
+ }
+ if (a->next_this_sw_interface != ~0)
+ {
+ next =
+ pool_elt_at_index (lm->if_address_pool,
+ a->next_this_sw_interface);
+ next->prev_this_sw_interface = a->prev_this_sw_interface;
+
+ if (a->prev_this_sw_interface == ~0)
+ lm->if_address_pool_index_by_sw_if_index[sw_if_index] =
+ a->next_this_sw_interface;
+ }
+
+ if ((a->next_this_sw_interface == ~0)
+ && (a->prev_this_sw_interface == ~0))
+ lm->if_address_pool_index_by_sw_if_index[sw_if_index] = ~0;
+
+ mhash_unset (&lm->address_to_if_address_index, addr_fib,
+ /* old_value */ 0);
+ pool_put (lm->if_address_pool, a);
+
+ if (result_if_address_index)
+ *result_if_address_index = ~0;
+ }
+
+ else if (!a)
+ {
+ u32 pi; /* previous index */
+ u32 ai;
+ u32 hi; /* head index */
+
+ pool_get (lm->if_address_pool, a);
+ memset (a, ~0, sizeof (a[0]));
+ ai = a - lm->if_address_pool;
+
+ hi = pi = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
+ prev = 0;
+ while (pi != (u32) ~ 0)
+ {
+ prev = pool_elt_at_index (lm->if_address_pool, pi);
+ pi = prev->next_this_sw_interface;
+ }
+ pi = prev ? prev - lm->if_address_pool : (u32) ~ 0;
+
+ a->address_key = mhash_set (&lm->address_to_if_address_index,
+ addr_fib, ai, /* old_value */ 0);
+ a->address_length = address_length;
+ a->sw_if_index = sw_if_index;
+ a->flags = 0;
+ a->prev_this_sw_interface = pi;
+ a->next_this_sw_interface = ~0;
+ if (prev)
+ prev->next_this_sw_interface = ai;
+
+ lm->if_address_pool_index_by_sw_if_index[sw_if_index] =
+ (hi != ~0) ? hi : ai;
+ if (result_if_address_index)
+ *result_if_address_index = ai;
+ }
+ else
+ {
+ if (sw_if_index != a->sw_if_index)
+ {
+ if (result_if_address_index)
+ *result_if_address_index = ~0;
+ vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
+ return clib_error_create
+ ("Prefix %U already found on interface %U",
+ lm->format_address_and_length, addr_fib, address_length,
+ format_vnet_sw_if_index_name, vnm, a->sw_if_index);
+ }
+
+ if (result_if_address_index)
+ *result_if_address_index = a - lm->if_address_pool;
+ }
+
+ return /* no error */ 0;
+}
+
+static clib_error_t *
+ip_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
+{
+ vec_validate_init_empty (ip4_main.
+ lookup_main.if_address_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+ vec_validate_init_empty (ip6_main.
+ lookup_main.if_address_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip_sw_interface_add_del);
+
+void
+ip_lookup_init (ip_lookup_main_t * lm, u32 is_ip6)
+{
+ if (!lm->fib_result_n_bytes)
+ lm->fib_result_n_bytes = sizeof (uword);
+
+ lm->is_ip6 = is_ip6;
+ if (is_ip6)
+ {
+ lm->format_address_and_length = format_ip6_address_and_length;
+ mhash_init (&lm->address_to_if_address_index, sizeof (uword),
+ sizeof (ip6_address_fib_t));
+ }
+ else
+ {
+ lm->format_address_and_length = format_ip4_address_and_length;
+ mhash_init (&lm->address_to_if_address_index, sizeof (uword),
+ sizeof (ip4_address_fib_t));
+ }
+
+ {
+ int i;
+
+ /* Setup all IP protocols to be punted and builtin-unknown. */
+ for (i = 0; i < 256; i++)
+ {
+ lm->local_next_by_ip_protocol[i] = IP_LOCAL_NEXT_PUNT;
+ lm->builtin_protocol_by_ip_protocol[i] = IP_BUILTIN_PROTOCOL_UNKNOWN;
+ }
+
+ lm->local_next_by_ip_protocol[IP_PROTOCOL_UDP] = IP_LOCAL_NEXT_UDP_LOOKUP;
+ lm->local_next_by_ip_protocol[is_ip6 ? IP_PROTOCOL_ICMP6 :
+ IP_PROTOCOL_ICMP] = IP_LOCAL_NEXT_ICMP;
+ lm->builtin_protocol_by_ip_protocol[IP_PROTOCOL_UDP] =
+ IP_BUILTIN_PROTOCOL_UDP;
+ lm->builtin_protocol_by_ip_protocol[is_ip6 ? IP_PROTOCOL_ICMP6 :
+ IP_PROTOCOL_ICMP] =
+ IP_BUILTIN_PROTOCOL_ICMP;
+ }
+}
+
+u8 *
+format_ip_flow_hash_config (u8 * s, va_list * args)
+{
+ flow_hash_config_t flow_hash_config = va_arg (*args, u32);
+
+#define _(n,v) if (flow_hash_config & v) s = format (s, "%s ", #n);
+ foreach_flow_hash_bit;
+#undef _
+
+ return s;
+}
+
+u8 *
+format_ip_lookup_next (u8 * s, va_list * args)
+{
+ /* int promotion of ip_lookup_next_t */
+ ip_lookup_next_t n = va_arg (*args, int);
+ char *t = 0;
+
+ switch (n)
+ {
+ default:
+ s = format (s, "unknown %d", n);
+ return s;
+
+ case IP_LOOKUP_NEXT_DROP:
+ t = "drop";
+ break;
+ case IP_LOOKUP_NEXT_PUNT:
+ t = "punt";
+ break;
+ case IP_LOOKUP_NEXT_ARP:
+ t = "arp";
+ break;
+ case IP_LOOKUP_NEXT_MIDCHAIN:
+ t = "midchain";
+ break;
+ case IP_LOOKUP_NEXT_GLEAN:
+ t = "glean";
+ break;
+ case IP_LOOKUP_NEXT_MCAST:
+ t = "mcast";
+ break;
+ case IP_LOOKUP_NEXT_REWRITE:
+ break;
+ }
+
+ if (t)
+ vec_add (s, t, strlen (t));
+
+ return s;
+}
+
+u8 *
+format_ip_adjacency_packet_data (u8 * s, va_list * args)
+{
+ u32 adj_index = va_arg (*args, u32);
+ u8 *packet_data = va_arg (*args, u8 *);
+ u32 n_packet_data_bytes = va_arg (*args, u32);
+ ip_adjacency_t *adj = adj_get (adj_index);
+
+ switch (adj->lookup_next_index)
+ {
+ case IP_LOOKUP_NEXT_REWRITE:
+ case IP_LOOKUP_NEXT_MCAST:
+ s =
+ format (s, "%U", format_hex_bytes, packet_data, n_packet_data_bytes);
+ break;
+
+ default:
+ break;
+ }
+
+ return s;
+}
+
+static uword
+unformat_dpo (unformat_input_t * input, va_list * args)
+{
+ dpo_id_t *dpo = va_arg (*args, dpo_id_t *);
+ fib_protocol_t fp = va_arg (*args, int);
+ dpo_proto_t proto;
+
+ proto = fib_proto_to_dpo (fp);
+
+ if (unformat (input, "drop"))
+ dpo_copy (dpo, drop_dpo_get (proto));
+ else if (unformat (input, "punt"))
+ dpo_copy (dpo, punt_dpo_get (proto));
+ else if (unformat (input, "local"))
+ receive_dpo_add_or_lock (proto, ~0, NULL, dpo);
+ else if (unformat (input, "null-send-unreach"))
+ ip_null_dpo_add_and_lock (proto, IP_NULL_ACTION_SEND_ICMP_UNREACH, dpo);
+ else if (unformat (input, "null-send-prohibit"))
+ ip_null_dpo_add_and_lock (proto, IP_NULL_ACTION_SEND_ICMP_PROHIBIT, dpo);
+ else if (unformat (input, "null"))
+ ip_null_dpo_add_and_lock (proto, IP_NULL_ACTION_NONE, dpo);
+ else if (unformat (input, "classify"))
+ {
+ u32 classify_table_index;
+
+ if (!unformat (input, "%d", &classify_table_index))
+ {
+ clib_warning ("classify adj must specify table index");
+ return 0;
+ }
+
+ dpo_set (dpo, DPO_CLASSIFY, proto,
+ classify_dpo_create (proto, classify_table_index));
+ }
+ else
+ return 0;
+
+ return 1;
+}
+
+const ip46_address_t zero_addr = {
+ .as_u64 = {
+ 0, 0},
+};
+
+clib_error_t *
+vnet_ip_route_cmd (vlib_main_t * vm,
+ unformat_input_t * main_input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ fib_route_path_t *rpaths = NULL, rpath;
+ dpo_id_t dpo = DPO_INVALID, *dpos = NULL;
+ fib_prefix_t *prefixs = NULL, pfx;
+ mpls_label_t out_label, via_label;
+ clib_error_t *error = NULL;
+ u32 weight, preference;
+ u32 table_id, is_del;
+ vnet_main_t *vnm;
+ u32 fib_index;
+ f64 count;
+ int i;
+
+ vnm = vnet_get_main ();
+ is_del = 0;
+ table_id = 0;
+ count = 1;
+ memset (&pfx, 0, sizeof (pfx));
+ out_label = via_label = MPLS_LABEL_INVALID;
+
+ /* Get a line of input. */
+ if (!unformat_user (main_input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ memset (&rpath, 0, sizeof (rpath));
+
+ if (unformat (line_input, "table %d", &table_id))
+ ;
+ else if (unformat (line_input, "resolve-via-host"))
+ {
+ if (vec_len (rpaths) == 0)
+ {
+ error = clib_error_return (0, "Paths then flags");
+ goto done;
+ }
+ rpaths[vec_len (rpaths) - 1].frp_flags |=
+ FIB_ROUTE_PATH_RESOLVE_VIA_HOST;
+ }
+ else if (unformat (line_input, "resolve-via-attached"))
+ {
+ if (vec_len (rpaths) == 0)
+ {
+ error = clib_error_return (0, "Paths then flags");
+ goto done;
+ }
+ rpaths[vec_len (rpaths) - 1].frp_flags |=
+ FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED;
+ }
+ else if (unformat (line_input, "out-labels"))
+ {
+ if (vec_len (rpaths) == 0)
+ {
+ error = clib_error_return (0, "Paths then labels");
+ goto done;
+ }
+ else
+ {
+ while (unformat (line_input, "%U",
+ unformat_mpls_unicast_label, &out_label))
+ {
+ vec_add1 (rpaths[vec_len (rpaths) - 1].frp_label_stack,
+ out_label);
+ }
+ }
+ }
+ else if (unformat (line_input, "via-label %U",
+ unformat_mpls_unicast_label, &rpath.frp_local_label))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_eos = MPLS_NON_EOS;
+ rpath.frp_proto = DPO_PROTO_MPLS;
+ rpath.frp_sw_if_index = ~0;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input, "count %f", &count))
+ ;
+
+ else if (unformat (line_input, "%U/%d",
+ unformat_ip4_address, &pfx.fp_addr.ip4, &pfx.fp_len))
+ {
+ pfx.fp_proto = FIB_PROTOCOL_IP4;
+ vec_add1 (prefixs, pfx);
+ }
+ else if (unformat (line_input, "%U/%d",
+ unformat_ip6_address, &pfx.fp_addr.ip6, &pfx.fp_len))
+ {
+ pfx.fp_proto = FIB_PROTOCOL_IP6;
+ vec_add1 (prefixs, pfx);
+ }
+ else if (unformat (line_input, "via %U %U",
+ unformat_ip4_address,
+ &rpath.frp_addr.ip4,
+ unformat_vnet_sw_interface, vnm,
+ &rpath.frp_sw_if_index))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_proto = DPO_PROTO_IP4;
+ vec_add1 (rpaths, rpath);
+ }
+
+ else if (unformat (line_input, "via %U %U",
+ unformat_ip6_address,
+ &rpath.frp_addr.ip6,
+ unformat_vnet_sw_interface, vnm,
+ &rpath.frp_sw_if_index))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_proto = DPO_PROTO_IP6;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input, "weight %u", &weight))
+ {
+ ASSERT (vec_len (rpaths));
+ rpaths[vec_len (rpaths) - 1].frp_weight = weight;
+ }
+ else if (unformat (line_input, "preference %u", &preference))
+ {
+ ASSERT (vec_len (rpaths));
+ rpaths[vec_len (rpaths) - 1].frp_preference = preference;
+ }
+ else if (unformat (line_input, "via %U next-hop-table %d",
+ unformat_ip4_address,
+ &rpath.frp_addr.ip4, &rpath.frp_fib_index))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = ~0;
+ rpath.frp_proto = DPO_PROTO_IP4;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input, "via %U next-hop-table %d",
+ unformat_ip6_address,
+ &rpath.frp_addr.ip6, &rpath.frp_fib_index))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = ~0;
+ rpath.frp_proto = DPO_PROTO_IP6;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input, "via %U",
+ unformat_ip4_address, &rpath.frp_addr.ip4))
+ {
+ /*
+ * the recursive next-hops are by default in the same table
+ * as the prefix
+ */
+ rpath.frp_fib_index = table_id;
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = ~0;
+ rpath.frp_proto = DPO_PROTO_IP4;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input, "via %U",
+ unformat_ip6_address, &rpath.frp_addr.ip6))
+ {
+ rpath.frp_fib_index = table_id;
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = ~0;
+ rpath.frp_proto = DPO_PROTO_IP6;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (unformat (line_input,
+ "lookup in table %d", &rpath.frp_fib_index))
+ {
+ rpath.frp_proto = fib_proto_to_dpo (pfx.fp_proto);
+ rpath.frp_sw_if_index = ~0;
+ vec_add1 (rpaths, rpath);
+ }
+ else if (vec_len (prefixs) > 0 &&
+ unformat (line_input, "via %U",
+ unformat_vnet_sw_interface, vnm,
+ &rpath.frp_sw_if_index))
+ {
+ rpath.frp_weight = 1;
+ rpath.frp_proto = fib_proto_to_dpo (prefixs[0].fp_proto);
+ vec_add1 (rpaths, rpath);
+ }
+ else if (vec_len (prefixs) > 0 &&
+ unformat (line_input, "via %U",
+ unformat_dpo, &dpo, prefixs[0].fp_proto))
+ {
+ vec_add1 (dpos, dpo);
+ }
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else if (unformat (line_input, "add"))
+ is_del = 0;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (vec_len (prefixs) == 0)
+ {
+ error =
+ clib_error_return (0, "expected ip4/ip6 destination address/length.");
+ goto done;
+ }
+
+ if (!is_del && vec_len (rpaths) + vec_len (dpos) == 0)
+ {
+ error = clib_error_return (0, "expected paths.");
+ goto done;
+ }
+
+ if (~0 == table_id)
+ {
+ /*
+ * if no table_id is passed we will manipulate the default
+ */
+ fib_index = 0;
+ }
+ else
+ {
+ fib_index = fib_table_find (prefixs[0].fp_proto, table_id);
+
+ if (~0 == fib_index)
+ {
+ error = clib_error_return (0, "Nonexistent table id %d", table_id);
+ goto done;
+ }
+ }
+
+ for (i = 0; i < vec_len (prefixs); i++)
+ {
+ if (is_del && 0 == vec_len (rpaths))
+ {
+ fib_table_entry_delete (fib_index, &prefixs[i], FIB_SOURCE_CLI);
+ }
+ else if (!is_del && 1 == vec_len (dpos))
+ {
+ fib_table_entry_special_dpo_add (fib_index,
+ &prefixs[i],
+ FIB_SOURCE_CLI,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &dpos[0]);
+ dpo_reset (&dpos[0]);
+ }
+ else if (vec_len (dpos) > 0)
+ {
+ error =
+ clib_error_return (0,
+ "Load-balancing over multiple special adjacencies is unsupported");
+ goto done;
+ }
+ else if (0 < vec_len (rpaths))
+ {
+ u32 k, j, n, incr;
+ ip46_address_t dst = prefixs[i].fp_addr;
+ f64 t[2];
+ n = count;
+ t[0] = vlib_time_now (vm);
+ incr = 1 << ((FIB_PROTOCOL_IP4 == prefixs[0].fp_proto ? 32 : 128) -
+ prefixs[i].fp_len);
+
+ for (k = 0; k < n; k++)
+ {
+ for (j = 0; j < vec_len (rpaths); j++)
+ {
+ u32 fi;
+ /*
+ * the CLI parsing stored table Ids, swap to FIB indicies
+ */
+ fi = fib_table_find (prefixs[i].fp_proto,
+ rpaths[i].frp_fib_index);
+
+ if (~0 == fi)
+ {
+ error =
+ clib_error_return (0, "Via table %d does not exist",
+ rpaths[i].frp_fib_index);
+ goto done;
+ }
+ rpaths[i].frp_fib_index = fi;
+
+ fib_prefix_t rpfx = {
+ .fp_len = prefixs[i].fp_len,
+ .fp_proto = prefixs[i].fp_proto,
+ .fp_addr = dst,
+ };
+
+ if (is_del)
+ fib_table_entry_path_remove2 (fib_index,
+ &rpfx,
+ FIB_SOURCE_CLI, &rpaths[j]);
+ else
+ fib_table_entry_path_add2 (fib_index,
+ &rpfx,
+ FIB_SOURCE_CLI,
+ FIB_ENTRY_FLAG_NONE,
+ &rpaths[j]);
+ }
+
+ if (FIB_PROTOCOL_IP4 == prefixs[0].fp_proto)
+ {
+ dst.ip4.as_u32 =
+ clib_host_to_net_u32 (incr +
+ clib_net_to_host_u32 (dst.
+ ip4.as_u32));
+ }
+ else
+ {
+ int bucket = (incr < 64 ? 0 : 1);
+ dst.ip6.as_u64[bucket] =
+ clib_host_to_net_u64 (incr +
+ clib_net_to_host_u64 (dst.ip6.as_u64
+ [bucket]));
+
+ }
+ }
+ t[1] = vlib_time_now (vm);
+ if (count > 1)
+ vlib_cli_output (vm, "%.6e routes/sec", count / (t[1] - t[0]));
+ }
+ else
+ {
+ error = clib_error_return (0, "Don't understand what you want...");
+ goto done;
+ }
+ }
+
+
+done:
+ vec_free (dpos);
+ vec_free (prefixs);
+ vec_free (rpaths);
+ unformat_free (line_input);
+ return error;
+}
+
+clib_error_t *
+vnet_ip_table_cmd (vlib_main_t * vm,
+ unformat_input_t * main_input,
+ vlib_cli_command_t * cmd, fib_protocol_t fproto)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = NULL;
+ u32 table_id, is_add;
+ u8 *name = NULL;
+
+ is_add = 1;
+ table_id = ~0;
+
+ /* Get a line of input. */
+ if (!unformat_user (main_input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%d", &table_id))
+ ;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else if (unformat (line_input, "add"))
+ is_add = 1;
+ else if (unformat (line_input, "name %s", &name))
+ ;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == table_id)
+ {
+ error = clib_error_return (0, "No table id");
+ goto done;
+ }
+ else if (0 == table_id)
+ {
+ error = clib_error_return (0, "Can't change the default table");
+ goto done;
+ }
+ else
+ {
+ if (is_add)
+ {
+ ip_table_create (fproto, table_id, 0, name);
+ }
+ else
+ {
+ ip_table_delete (fproto, table_id, 0);
+ }
+ }
+
+done:
+ unformat_free (line_input);
+ return error;
+}
+
+clib_error_t *
+vnet_ip4_table_cmd (vlib_main_t * vm,
+ unformat_input_t * main_input, vlib_cli_command_t * cmd)
+{
+ return (vnet_ip_table_cmd (vm, main_input, cmd, FIB_PROTOCOL_IP4));
+}
+
+clib_error_t *
+vnet_ip6_table_cmd (vlib_main_t * vm,
+ unformat_input_t * main_input, vlib_cli_command_t * cmd)
+{
+ return (vnet_ip_table_cmd (vm, main_input, cmd, FIB_PROTOCOL_IP6));
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vlib_cli_ip_command, static) = {
+ .path = "ip",
+ .short_help = "Internet protocol (IP) commands",
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vlib_cli_ip6_command, static) = {
+ .path = "ip6",
+ .short_help = "Internet protocol version 6 (IPv6) commands",
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vlib_cli_show_ip_command, static) = {
+ .path = "show ip",
+ .short_help = "Internet protocol (IP) show commands",
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vlib_cli_show_ip6_command, static) = {
+ .path = "show ip6",
+ .short_help = "Internet protocol version 6 (IPv6) show commands",
+};
+/* *INDENT-ON* */
+
+/*?
+ * This command is used to add or delete IPv4 or IPv6 routes. All
+ * IP Addresses ('<em><dst-ip-addr>/<width></em>',
+ * '<em><next-hop-ip-addr></em>' and '<em><adj-hop-ip-addr></em>')
+ * can be IPv4 or IPv6, but all must be of the same form in a single
+ * command. To display the current set of routes, use the commands
+ * '<em>show ip fib</em>' and '<em>show ip6 fib</em>'.
+ *
+ * @cliexpar
+ * Example of how to add a straight forward static route:
+ * @cliexcmd{ip route add 6.0.1.2/32 via 6.0.0.1 GigabitEthernet2/0/0}
+ * Example of how to delete a straight forward static route:
+ * @cliexcmd{ip route del 6.0.1.2/32 via 6.0.0.1 GigabitEthernet2/0/0}
+ * Mainly for route add/del performance testing, one can add or delete
+ * multiple routes by adding 'count N' to the previous item:
+ * @cliexcmd{ip route add count 10 7.0.0.0/24 via 6.0.0.1 GigabitEthernet2/0/0}
+ * Add multiple routes for the same destination to create equal-cost multipath:
+ * @cliexcmd{ip route add 7.0.0.1/32 via 6.0.0.1 GigabitEthernet2/0/0}
+ * @cliexcmd{ip route add 7.0.0.1/32 via 6.0.0.2 GigabitEthernet2/0/0}
+ * For unequal-cost multipath, specify the desired weights. This
+ * combination of weights results in 3/4 of the traffic following the
+ * second path, 1/4 following the first path:
+ * @cliexcmd{ip route add 7.0.0.1/32 via 6.0.0.1 GigabitEthernet2/0/0 weight 1}
+ * @cliexcmd{ip route add 7.0.0.1/32 via 6.0.0.2 GigabitEthernet2/0/0 weight 3}
+ * To add a route to a particular FIB table (VRF), use:
+ * @cliexcmd{ip route add 172.16.24.0/24 table 7 via GigabitEthernet2/0/0}
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip_route_command, static) = {
+ .path = "ip route",
+ .short_help = "ip route [add|del] [count <n>] <dst-ip-addr>/<width> [table <table-id>] [via <next-hop-ip-addr> [<interface>] [weight <weight>]] | [via arp <interface> <adj-hop-ip-addr>] | [via drop|punt|local<id>|arp|classify <classify-idx>] [lookup in table <out-table-id>]",
+ .function = vnet_ip_route_cmd,
+ .is_mp_safe = 1,
+};
+
+/* *INDENT-ON* */
+/*?
+ * This command is used to add or delete IPv4 Tables. All
+ * Tables must be explicitly added before that can be used. Creating a
+ * table will add both unicast and multicast FIBs
+ *
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip4_table_command, static) = {
+ .path = "ip table",
+ .short_help = "ip table [add|del] <table-id>",
+ .function = vnet_ip4_table_cmd,
+ .is_mp_safe = 1,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-ON* */
+/*?
+ * This command is used to add or delete IPv4 Tables. All
+ * Tables must be explicitly added before that can be used. Creating a
+ * table will add both unicast and multicast FIBs
+ *
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip6_table_command, static) = {
+ .path = "ip6 table",
+ .short_help = "ip6 table [add|del] <table-id>",
+ .function = vnet_ip6_table_cmd,
+ .is_mp_safe = 1,
+};
+
+static clib_error_t *
+ip_table_bind_cmd (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd,
+ fib_protocol_t fproto)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index, table_id;
+ int rv;
+
+ sw_if_index = ~0;
+
+ if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ if (unformat (input, "%d", &table_id))
+ ;
+ else
+ {
+ error = clib_error_return (0, "expected table id `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ rv = ip_table_bind (fproto, sw_if_index, table_id, 0);
+
+ if (VNET_API_ERROR_ADDRESS_FOUND_FOR_INTERFACE == rv)
+ {
+ error = clib_error_return (0, "IP addresses are still present on %U",
+ format_vnet_sw_if_index_name,
+ vnet_get_main(),
+ sw_if_index);
+ }
+ else if (VNET_API_ERROR_NO_SUCH_FIB == rv)
+ {
+ error = clib_error_return (0, "no such table %d", table_id);
+ }
+ else if (0 != rv)
+ {
+ error = clib_error_return (0, "unknown error");
+ }
+
+ done:
+ return error;
+}
+
+static clib_error_t *
+ip4_table_bind_cmd (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ return (ip_table_bind_cmd (vm , input, cmd, FIB_PROTOCOL_IP4));
+}
+
+static clib_error_t *
+ip6_table_bind_cmd (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ return (ip_table_bind_cmd (vm , input, cmd, FIB_PROTOCOL_IP6));
+}
+
+/*?
+ * Place the indicated interface into the supplied IPv4 FIB table (also known
+ * as a VRF). If the FIB table does not exist, this command creates it. To
+ * display the current IPv4 FIB table, use the command '<em>show ip fib</em>'.
+ * FIB table will only be displayed if a route has been added to the table, or
+ * an IP Address is assigned to an interface in the table (which adds a route
+ * automatically).
+ *
+ * @note IP addresses added after setting the interface IP table are added to
+ * the indicated FIB table. If an IP address is added prior to changing the
+ * table then this is an error. The control plane must remove these addresses
+ * first and then change the table. VPP will not automatically move the
+ * addresses from the old to the new table as it does not know the validity
+ * of such a change.
+ *
+ * @cliexpar
+ * Example of how to add an interface to an IPv4 FIB table (where 2 is the table-id):
+ * @cliexcmd{set interface ip table GigabitEthernet2/0/0 2}
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_table_command, static) =
+{
+ .path = "set interface ip table",
+ .function = ip4_table_bind_cmd,
+ .short_help = "set interface ip table <interface> <table-id>",
+};
+/* *INDENT-ON* */
+
+/*?
+ * Place the indicated interface into the supplied IPv6 FIB table (also known
+ * as a VRF). If the FIB table does not exist, this command creates it. To
+ * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
+ * FIB table will only be displayed if a route has been added to the table, or
+ * an IP Address is assigned to an interface in the table (which adds a route
+ * automatically).
+ *
+ * @note IP addresses added after setting the interface IP table are added to
+ * the indicated FIB table. If an IP address is added prior to changing the
+ * table then this is an error. The control plane must remove these addresses
+ * first and then change the table. VPP will not automatically move the
+ * addresses from the old to the new table as it does not know the validity
+ * of such a change.
+ *
+ * @cliexpar
+ * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
+ * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
+{
+ .path = "set interface ip6 table",
+ .function = ip6_table_bind_cmd,
+ .short_help = "set interface ip6 table <interface> <table-id>"
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+vnet_ip_mroute_cmd (vlib_main_t * vm,
+ unformat_input_t * main_input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = NULL;
+ fib_route_path_t rpath;
+ u32 table_id, is_del;
+ vnet_main_t *vnm;
+ mfib_prefix_t pfx;
+ u32 fib_index;
+ mfib_itf_flags_t iflags = 0;
+ mfib_entry_flags_t eflags = 0;
+ u32 gcount, scount, ss, gg, incr;
+ f64 timet[2];
+
+ gcount = scount = 1;
+ vnm = vnet_get_main ();
+ is_del = 0;
+ table_id = 0;
+ memset (&pfx, 0, sizeof (pfx));
+ memset (&rpath, 0, sizeof (rpath));
+ rpath.frp_sw_if_index = ~0;
+
+ /* Get a line of input. */
+ if (!unformat_user (main_input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "table %d", &table_id))
+ ;
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else if (unformat (line_input, "add"))
+ is_del = 0;
+ else if (unformat (line_input, "scount %d", &scount))
+ ;
+ else if (unformat (line_input, "gcount %d", &gcount))
+ ;
+ else if (unformat (line_input, "%U %U",
+ unformat_ip4_address,
+ &pfx.fp_src_addr.ip4,
+ unformat_ip4_address, &pfx.fp_grp_addr.ip4))
+ {
+ pfx.fp_proto = FIB_PROTOCOL_IP4;
+ pfx.fp_len = 64;
+ }
+ else if (unformat (line_input, "%U %U",
+ unformat_ip6_address,
+ &pfx.fp_src_addr.ip6,
+ unformat_ip6_address, &pfx.fp_grp_addr.ip6))
+ {
+ pfx.fp_proto = FIB_PROTOCOL_IP6;
+ pfx.fp_len = 256;
+ }
+ else if (unformat (line_input, "%U/%d",
+ unformat_ip4_address,
+ &pfx.fp_grp_addr.ip4, &pfx.fp_len))
+ {
+ memset (&pfx.fp_src_addr.ip4, 0, sizeof (pfx.fp_src_addr.ip4));
+ pfx.fp_proto = FIB_PROTOCOL_IP4;
+ }
+ else if (unformat (line_input, "%U/%d",
+ unformat_ip6_address,
+ &pfx.fp_grp_addr.ip6, &pfx.fp_len))
+ {
+ memset (&pfx.fp_src_addr.ip6, 0, sizeof (pfx.fp_src_addr.ip6));
+ pfx.fp_proto = FIB_PROTOCOL_IP6;
+ }
+ else if (unformat (line_input, "%U",
+ unformat_ip4_address, &pfx.fp_grp_addr.ip4))
+ {
+ memset (&pfx.fp_src_addr.ip4, 0, sizeof (pfx.fp_src_addr.ip4));
+ pfx.fp_proto = FIB_PROTOCOL_IP4;
+ pfx.fp_len = 32;
+ }
+ else if (unformat (line_input, "%U",
+ unformat_ip6_address, &pfx.fp_grp_addr.ip6))
+ {
+ memset (&pfx.fp_src_addr.ip6, 0, sizeof (pfx.fp_src_addr.ip6));
+ pfx.fp_proto = FIB_PROTOCOL_IP6;
+ pfx.fp_len = 128;
+ }
+ else if (unformat (line_input, "via %U",
+ unformat_vnet_sw_interface, vnm,
+ &rpath.frp_sw_if_index))
+ {
+ rpath.frp_weight = 1;
+ }
+ else if (unformat (line_input, "via local"))
+ {
+ rpath.frp_sw_if_index = ~0;
+ rpath.frp_weight = 1;
+ rpath.frp_flags |= FIB_ROUTE_PATH_LOCAL;
+ }
+ else if (unformat (line_input, "%U", unformat_mfib_itf_flags, &iflags))
+ ;
+ else if (unformat (line_input, "%U",
+ unformat_mfib_entry_flags, &eflags))
+ ;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == table_id)
+ {
+ /*
+ * if no table_id is passed we will manipulate the default
+ */
+ fib_index = 0;
+ }
+ else
+ {
+ fib_index = mfib_table_find (pfx.fp_proto, table_id);
+
+ if (~0 == fib_index)
+ {
+ error = clib_error_return (0, "Nonexistent table id %d", table_id);
+ goto done;
+ }
+ }
+
+ timet[0] = vlib_time_now (vm);
+
+ if (FIB_PROTOCOL_IP4 == pfx.fp_proto)
+ {
+ incr = 1 << (32 - (pfx.fp_len % 32));
+ }
+ else
+ {
+ incr = 1 << (128 - (pfx.fp_len % 128));
+ }
+
+ for (ss = 0; ss < scount; ss++)
+ {
+ for (gg = 0; gg < gcount; gg++)
+ {
+ if (is_del && 0 == rpath.frp_weight)
+ {
+ /* no path provided => route delete */
+ mfib_table_entry_delete (fib_index, &pfx, MFIB_SOURCE_CLI);
+ }
+ else if (eflags)
+ {
+ mfib_table_entry_update (fib_index, &pfx, MFIB_SOURCE_CLI,
+ MFIB_RPF_ID_NONE, eflags);
+ }
+ else
+ {
+ if (is_del)
+ mfib_table_entry_path_remove (fib_index,
+ &pfx, MFIB_SOURCE_CLI, &rpath);
+ else
+ mfib_table_entry_path_update (fib_index,
+ &pfx, MFIB_SOURCE_CLI, &rpath,
+ iflags);
+ }
+
+ if (FIB_PROTOCOL_IP4 == pfx.fp_proto)
+ {
+ pfx.fp_grp_addr.ip4.as_u32 =
+ clib_host_to_net_u32 (incr +
+ clib_net_to_host_u32 (pfx.
+ fp_grp_addr.ip4.
+ as_u32));
+ }
+ else
+ {
+ int bucket = (incr < 64 ? 0 : 1);
+ pfx.fp_grp_addr.ip6.as_u64[bucket] =
+ clib_host_to_net_u64 (incr +
+ clib_net_to_host_u64 (pfx.
+ fp_grp_addr.ip6.as_u64
+ [bucket]));
+
+ }
+ }
+ if (FIB_PROTOCOL_IP4 == pfx.fp_proto)
+ {
+ pfx.fp_src_addr.ip4.as_u32 =
+ clib_host_to_net_u32 (1 +
+ clib_net_to_host_u32 (pfx.fp_src_addr.
+ ip4.as_u32));
+ }
+ else
+ {
+ pfx.fp_src_addr.ip6.as_u64[1] =
+ clib_host_to_net_u64 (1 +
+ clib_net_to_host_u64 (pfx.fp_src_addr.
+ ip6.as_u64[1]));
+ }
+ }
+
+ timet[1] = vlib_time_now (vm);
+
+ if (scount > 1 || gcount > 1)
+ vlib_cli_output (vm, "%.6e routes/sec",
+ (scount * gcount) / (timet[1] - timet[0]));
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * This command is used to add or delete IPv4 or IPv6 multicastroutes. All
+ * IP Addresses ('<em><dst-ip-addr>/<width></em>',
+ * '<em><next-hop-ip-addr></em>' and '<em><adj-hop-ip-addr></em>')
+ * can be IPv4 or IPv6, but all must be of the same form in a single
+ * command. To display the current set of routes, use the commands
+ * '<em>show ip mfib</em>' and '<em>show ip6 mfib</em>'.
+ * The full set of support flags for interfaces and route is shown via;
+ * '<em>show mfib route flags</em>' and '<em>show mfib itf flags</em>'
+ * respectively.
+ * @cliexpar
+ * Example of how to add a forwarding interface to a route (and create the
+ * route if it does not exist)
+ * @cliexcmd{ip mroute add 232.1.1.1 via GigabitEthernet2/0/0 Forward}
+ * Example of how to add an accepting interface to a route (and create the
+ * route if it does not exist)
+ * @cliexcmd{ip mroute add 232.1.1.1 via GigabitEthernet2/0/1 Accept}
+ * Example of changing the route's flags to send signals via the API
+ * @cliexcmd{ip mroute add 232.1.1.1 Signal}
+
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip_mroute_command, static) =
+{
+ .path = "ip mroute",
+ .short_help = "ip mroute [add|del] <dst-ip-addr>/<width> [table <table-id>] [via <next-hop-ip-addr> [<interface>],",
+ .function = vnet_ip_mroute_cmd,
+ .is_mp_safe = 1,
+};
+/* *INDENT-ON* */
+
+/*
+ * The next two routines address a longstanding script hemorrhoid.
+ * Probing a v4 or v6 neighbor needs to appear to be synchronous,
+ * or dependent route-adds will simply fail.
+ */
+static clib_error_t *
+ip6_probe_neighbor_wait (vlib_main_t * vm, ip6_address_t * a, u32 sw_if_index,
+ int retry_count)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *e;
+ int i;
+ int resolved = 0;
+ uword event_type;
+ uword *event_data = 0;
+
+ ASSERT (vlib_in_process_context (vm));
+
+ if (retry_count > 0)
+ vnet_register_ip6_neighbor_resolution_event
+ (vnm, a, vlib_get_current_process (vm)->node_runtime.node_index,
+ 1 /* event */ , 0 /* data */ );
+
+ for (i = 0; i < retry_count; i++)
+ {
+ /* The interface may be down, etc. */
+ e = ip6_probe_neighbor (vm, a, sw_if_index);
+
+ if (e)
+ return e;
+
+ vlib_process_wait_for_event_or_clock (vm, 1.0);
+ event_type = vlib_process_get_events (vm, &event_data);
+ switch (event_type)
+ {
+ case 1: /* resolved... */
+ vlib_cli_output (vm, "Resolved %U", format_ip6_address, a);
+ resolved = 1;
+ goto done;
+
+ case ~0: /* timeout */
+ break;
+
+ default:
+ clib_warning ("unknown event_type %d", event_type);
+ }
+ vec_reset_length (event_data);
+ }
+
+done:
+
+ if (!resolved)
+ return clib_error_return (0, "Resolution failed for %U",
+ format_ip6_address, a);
+ return 0;
+}
+
+static clib_error_t *
+ip4_probe_neighbor_wait (vlib_main_t * vm, ip4_address_t * a, u32 sw_if_index,
+ int retry_count)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *e;
+ int i;
+ int resolved = 0;
+ uword event_type;
+ uword *event_data = 0;
+
+ ASSERT (vlib_in_process_context (vm));
+
+ if (retry_count > 0)
+ vnet_register_ip4_arp_resolution_event
+ (vnm, a, vlib_get_current_process (vm)->node_runtime.node_index,
+ 1 /* event */ , 0 /* data */ );
+
+ for (i = 0; i < retry_count; i++)
+ {
+ /* The interface may be down, etc. */
+ e = ip4_probe_neighbor (vm, a, sw_if_index);
+
+ if (e)
+ return e;
+
+ vlib_process_wait_for_event_or_clock (vm, 1.0);
+ event_type = vlib_process_get_events (vm, &event_data);
+ switch (event_type)
+ {
+ case 1: /* resolved... */
+ vlib_cli_output (vm, "Resolved %U", format_ip4_address, a);
+ resolved = 1;
+ goto done;
+
+ case ~0: /* timeout */
+ break;
+
+ default:
+ clib_warning ("unknown event_type %d", event_type);
+ }
+ vec_reset_length (event_data);
+ }
+
+done:
+
+ vec_reset_length (event_data);
+
+ if (!resolved)
+ return clib_error_return (0, "Resolution failed for %U",
+ format_ip4_address, a);
+ return 0;
+}
+
+static clib_error_t *
+probe_neighbor_address (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t a4;
+ ip6_address_t a6;
+ clib_error_t *error = 0;
+ u32 sw_if_index = ~0;
+ int retry_count = 3;
+ int is_ip4 = 1;
+ int address_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_user (line_input, unformat_vnet_sw_interface, vnm,
+ &sw_if_index))
+ ;
+ else if (unformat (line_input, "retry %d", &retry_count))
+ ;
+
+ else if (unformat (line_input, "%U", unformat_ip4_address, &a4))
+ address_set++;
+ else if (unformat (line_input, "%U", unformat_ip6_address, &a6))
+ {
+ address_set++;
+ is_ip4 = 0;
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (sw_if_index == ~0)
+ {
+ error = clib_error_return (0, "Interface required, not set.");
+ goto done;
+ }
+ if (address_set == 0)
+ {
+ error = clib_error_return (0, "ip address required, not set.");
+ goto done;
+ }
+ if (address_set > 1)
+ {
+ error = clib_error_return (0, "Multiple ip addresses not supported.");
+ goto done;
+ }
+
+ if (is_ip4)
+ error = ip4_probe_neighbor_wait (vm, &a4, sw_if_index, retry_count);
+ else
+ error = ip6_probe_neighbor_wait (vm, &a6, sw_if_index, retry_count);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * The '<em>ip probe-neighbor</em>' command ARPs for IPv4 addresses or
+ * attempts IPv6 neighbor discovery depending on the supplied IP address
+ * format.
+ *
+ * @note This command will not immediately affect the indicated FIB; it
+ * is not suitable for use in establishing a FIB entry prior to adding
+ * recursive FIB entries. As in: don't use it in a script to probe a
+ * gateway prior to adding a default route. It won't work. Instead,
+ * configure a static ARP cache entry [see '<em>set ip arp</em>'], or
+ * a static IPv6 neighbor [see '<em>set ip6 neighbor</em>'].
+ *
+ * @cliexpar
+ * Example of probe for an IPv4 address:
+ * @cliexcmd{ip probe-neighbor GigabitEthernet2/0/0 172.16.1.2}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip_probe_neighbor_command, static) = {
+ .path = "ip probe-neighbor",
+ .function = probe_neighbor_address,
+ .short_help = "ip probe-neighbor <interface> <ip4-addr> | <ip6-addr> [retry nn]",
+ .is_mp_safe = 1,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */