--- /dev/null
+/*
+ * Copyright (c) 2021 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 <stddef.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+#include <vnet/ip-neighbor/ip4_neighbor.h>
+#include <vnet/ip-neighbor/ip6_neighbor.h>
+#include <arping/arping.h>
+
+arping_main_t arping_main;
+
+#define foreach_arping_error _ (NONE, "no error")
+
+typedef enum
+{
+#define _(f, s) ARPING_ERROR_##f,
+ foreach_arping_error
+#undef _
+ ARPING_N_ERROR,
+} arping__error_t;
+
+static char *arping_error_strings[] = {
+#define _(n, s) s,
+ foreach_arping_error
+#undef _
+};
+
+#define foreach_arping \
+ _ (DROP, "error-drop") \
+ _ (IO, "interface-output")
+
+typedef enum
+{
+#define _(sym, str) ARPING_NEXT_##sym,
+ foreach_arping
+#undef _
+ ARPING_N_NEXT,
+} arping_next_t;
+
+typedef struct arping_trace_t_
+{
+ u32 sw_if_index;
+ u16 arp_opcode;
+ ethernet_arp_ip4_over_ethernet_address_t reply;
+} arping_trace_t;
+
+typedef enum
+{
+#define _(sym, str) ARPING6_NEXT_##sym,
+ foreach_arping
+#undef _
+ ARPING6_N_NEXT,
+} arping6_next_t;
+
+typedef CLIB_PACKED (struct {
+ mac_address_t mac;
+ ip6_address_t ip6;
+}) ethernet_arp_ip6_over_ethernet_address_t;
+
+typedef struct arping6_trace_t_
+{
+ u32 sw_if_index;
+ u8 type;
+ ethernet_arp_ip6_over_ethernet_address_t reply;
+} arping6_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_arping_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ arping_trace_t *t = va_arg (*args, arping_trace_t *);
+
+ s = format (s, "sw-if-index: %u, opcode: %U, from %U (%U)", t->sw_if_index,
+ format_ethernet_arp_opcode, t->arp_opcode, format_mac_address,
+ &t->reply.mac, format_ip4_address, &t->reply.ip4);
+
+ return s;
+}
+
+static u8 *
+format_arping6_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ arping6_trace_t *t = va_arg (*args, arping6_trace_t *);
+
+ s = format (s, "sw-if-index: %u, type: %u, from %U (%U)", t->sw_if_index,
+ t->type, format_mac_address, &t->reply.mac, format_ip6_address,
+ &t->reply.ip6);
+
+ return s;
+}
+
+VLIB_NODE_FN (arping_input_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ u32 n_left_from, *from, *to_next, n_left_to_next;
+ arping_next_t next_index;
+ arping_main_t *am = &arping_main;
+
+ next_index = node->cached_next_index;
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 2 && n_left_to_next >= 2)
+ {
+ u32 next0, next1, bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ ethernet_arp_header_t *arp0, *arp1;
+ u32 sw_if_index0, sw_if_index1;
+ arping_intf_t *aif0, *aif1;
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ next0 = next1 = ARPING_NEXT_DROP;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ arp0 = vlib_buffer_get_current (b0);
+ arp1 = vlib_buffer_get_current (b1);
+
+ vnet_feature_next (&next0, b0);
+ vnet_feature_next (&next1, b1);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_TRUE (arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)))
+ {
+ aif0 = am->interfaces[sw_if_index0];
+ if (PREDICT_TRUE (aif0->address.ip.ip4.as_u32 ==
+ arp0->ip4_over_ethernet[0].ip4.as_u32))
+ {
+ aif0->recv.from4.ip4.as_u32 =
+ arp0->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&aif0->recv.from4.mac,
+ &arp0->ip4_over_ethernet[0].mac, 6);
+ aif0->reply_count++;
+ }
+ }
+ if (PREDICT_TRUE (arp1->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)))
+ {
+ aif1 = am->interfaces[sw_if_index1];
+ if (PREDICT_TRUE (aif1->address.ip.ip4.as_u32 ==
+ arp1->ip4_over_ethernet[0].ip4.as_u32))
+ {
+ aif1->recv.from4.ip4.as_u32 =
+ arp1->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&aif1->recv.from4.mac,
+ &arp0->ip4_over_ethernet[0].mac, 6);
+ aif1->reply_count++;
+ }
+ }
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ t->arp_opcode = clib_host_to_net_u16 (arp0->opcode);
+ t->reply.ip4.as_u32 = arp0->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&t->reply.mac, &arp0->ip4_over_ethernet[0].mac,
+ 6);
+ }
+ if (PREDICT_FALSE ((b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+ t->arp_opcode = clib_host_to_net_u16 (arp1->opcode);
+ t->reply.ip4.as_u32 = arp1->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&t->reply.mac, &arp1->ip4_over_ethernet[0].mac,
+ 6);
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, next0,
+ next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 next0, bi0;
+ vlib_buffer_t *b0;
+ ethernet_arp_header_t *arp0;
+ arping_intf_t *aif0;
+ u32 sw_if_index0;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ next0 = ARPING_NEXT_DROP;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ arp0 = vlib_buffer_get_current (b0);
+
+ vnet_feature_next (&next0, b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_TRUE (arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)))
+ {
+ aif0 = am->interfaces[sw_if_index0];
+ if (PREDICT_TRUE (aif0->address.ip.ip4.as_u32 ==
+ arp0->ip4_over_ethernet[0].ip4.as_u32))
+ {
+ aif0->recv.from4.ip4.as_u32 =
+ arp0->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&aif0->recv.from4.mac,
+ &arp0->ip4_over_ethernet[0].mac, 6);
+ aif0->reply_count++;
+ }
+ }
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ t->arp_opcode = clib_host_to_net_u16 (arp0->opcode);
+ t->reply.ip4.as_u32 = arp0->ip4_over_ethernet[0].ip4.as_u32;
+ clib_memcpy_fast (&t->reply.mac, &arp0->ip4_over_ethernet[0].mac,
+ 6);
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (arping_input_node) =
+{
+ .name = "arping-input",.vector_size = sizeof (u32),.format_trace =
+ format_arping_trace,.type = VLIB_NODE_TYPE_INTERNAL,.n_errors =
+ ARPING_N_ERROR,.error_strings = arping_error_strings,.n_next_nodes =
+ ARPING_N_NEXT,.next_nodes =
+ {
+ [ARPING_NEXT_DROP] = "error-drop",[ARPING_NEXT_IO] = "interface-output",}
+,};
+
+VNET_FEATURE_INIT (arping_feat_node, static) = {
+ .arc_name = "arp",
+ .node_name = "arping-input",
+ .runs_before = VNET_FEATURES ("arp-reply"),
+};
+
+VLIB_NODE_FN (arping6_input_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ u32 n_left_from, *from, *to_next, n_left_to_next;
+ arping_next_t next_index;
+ arping_main_t *am = &arping_main;
+
+ next_index = node->cached_next_index;
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 2 && n_left_to_next >= 2)
+ {
+ u32 next0, next1, bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ ip6_header_t *ip60, *ip61;
+ u32 sw_if_index0, sw_if_index1;
+ arping_intf_t *aif0, *aif1;
+ icmp6_neighbor_solicitation_or_advertisement_header_t *sol_adv0,
+ *sol_adv1;
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ *lladdr0,
+ *lladdr1;
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ next0 = next1 = ARPING6_NEXT_DROP;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ ip60 = vlib_buffer_get_current (b0);
+ ip61 = vlib_buffer_get_current (b1);
+
+ vnet_feature_next (&next0, b0);
+ vnet_feature_next (&next1, b1);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ sol_adv0 = ip6_next_header (ip60);
+ lladdr0 =
+ (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ *) (sol_adv0 + 1);
+
+ if (PREDICT_TRUE (sol_adv0->icmp.type ==
+ ICMP6_neighbor_advertisement))
+ {
+ aif0 = am->interfaces[sw_if_index0];
+ if (PREDICT_TRUE (clib_memcmp (&aif0->address.ip.ip6,
+ &sol_adv0->target_address,
+ sizeof (aif0->address.ip.ip6)) ==
+ 0))
+ {
+ clib_memcpy_fast (&aif0->recv.from6.ip6,
+ &sol_adv0->target_address,
+ sizeof (aif0->recv.from6.ip6));
+ clib_memcpy_fast (&aif0->recv.from6.mac,
+ lladdr0->ethernet_address, 6);
+ aif0->reply_count++;
+ }
+ }
+
+ sol_adv1 = ip6_next_header (ip61);
+ lladdr1 =
+ (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ *) (sol_adv1 + 1);
+
+ if (PREDICT_TRUE (sol_adv1->icmp.type ==
+ ICMP6_neighbor_advertisement))
+ {
+ aif1 = am->interfaces[sw_if_index1];
+ if (PREDICT_TRUE (clib_memcmp (&aif1->address.ip.ip6,
+ &sol_adv1->target_address,
+ sizeof (aif1->address.ip.ip6)) ==
+ 0))
+ {
+ clib_memcpy_fast (&aif1->recv.from6.ip6,
+ &sol_adv1->target_address,
+ sizeof (aif1->recv.from6.ip6));
+ clib_memcpy_fast (&aif1->recv.from6.mac,
+ lladdr1->ethernet_address, 6);
+ aif1->reply_count++;
+ }
+ }
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping6_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ t->type = sol_adv0->icmp.type;
+ clib_memcpy_fast (&t->reply.ip6, &sol_adv0->target_address,
+ sizeof (t->reply.ip6));
+ clib_memcpy_fast (&t->reply.mac, lladdr0->ethernet_address, 6);
+ }
+ if (PREDICT_FALSE ((b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping6_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+ t->type = sol_adv1->icmp.type;
+ clib_memcpy_fast (&t->reply.ip6, &sol_adv1->target_address,
+ sizeof (t->reply.ip6));
+ clib_memcpy_fast (&t->reply.mac, lladdr1->ethernet_address, 6);
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, next0,
+ next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 next0, bi0;
+ vlib_buffer_t *b0;
+ arping_intf_t *aif0;
+ u32 sw_if_index0;
+ ip6_header_t *ip60;
+ icmp6_neighbor_solicitation_or_advertisement_header_t *sol_adv0;
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ *lladdr0;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ next0 = ARPING_NEXT_DROP;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip60 = vlib_buffer_get_current (b0);
+
+ vnet_feature_next (&next0, b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ sol_adv0 = ip6_next_header (ip60);
+ lladdr0 =
+ (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ *) (sol_adv0 + 1);
+ if (PREDICT_TRUE (sol_adv0->icmp.type ==
+ ICMP6_neighbor_advertisement))
+ {
+ aif0 = am->interfaces[sw_if_index0];
+ if (PREDICT_TRUE (clib_memcmp (&aif0->address.ip.ip6,
+ &sol_adv0->target_address,
+ sizeof (aif0->address.ip.ip6)) ==
+ 0))
+ {
+ clib_memcpy_fast (&aif0->recv.from6.ip6,
+ &sol_adv0->target_address,
+ sizeof (aif0->recv.from6.ip6));
+ clib_memcpy_fast (&aif0->recv.from6.mac,
+ lladdr0->ethernet_address, 6);
+ aif0->reply_count++;
+ }
+ }
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ arping6_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ t->type = sol_adv0->icmp.type;
+ clib_memcpy_fast (&t->reply.ip6, &sol_adv0->target_address,
+ sizeof (t->reply.ip6));
+ clib_memcpy_fast (&t->reply.mac, lladdr0->ethernet_address, 6);
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (arping6_input_node) =
+{
+ .name = "arping6-input",.vector_size = sizeof (u32),.format_trace =
+ format_arping6_trace,.type = VLIB_NODE_TYPE_INTERNAL,.n_errors =
+ ARPING_N_ERROR,.error_strings = arping_error_strings,.n_next_nodes =
+ ARPING_N_NEXT,.next_nodes =
+ {
+ [ARPING6_NEXT_DROP] = "error-drop",[ARPING6_NEXT_IO] = "interface-output",}
+,};
+
+VNET_FEATURE_INIT (arping6_feat_node, static) = {
+ .arc_name = "ip6-local",
+ .node_name = "arping6-input",
+ .runs_before = VNET_FEATURES ("ip6-local-end-of-arc"),
+};
+
+static clib_error_t *
+arping_neighbor_advertisement (vlib_main_t *vm, arping_args_t *args)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 send_count = 0;
+
+ while (args->repeat > 0)
+ {
+ send_count++;
+ if (args->address.version == AF_IP4)
+ {
+ if (args->silence == 0)
+ vlib_cli_output (vm, "Sending %u GARP to %U", send_count,
+ format_ip4_address, &args->address.ip.ip4);
+ ip4_neighbor_advertise (vm, vnm, args->sw_if_index,
+ &args->address.ip.ip4);
+ }
+ else
+ {
+ if (args->silence == 0)
+ vlib_cli_output (vm, "Sending %u Neighbor Advertisement to %U",
+ send_count, format_ip6_address,
+ &args->address.ip.ip6);
+ ip6_neighbor_advertise (vm, vnm, args->sw_if_index,
+ &args->address.ip.ip6);
+ }
+ args->repeat--;
+ if ((args->interval > 0.0) && (args->repeat > 0))
+ vlib_process_suspend (vm, args->interval);
+ }
+
+ return 0;
+}
+
+static void
+arping_vnet_feature_enable_disable (vlib_main_t *vm, const char *arc_name,
+ const char *node_name, u32 sw_if_index,
+ int enable_disable, void *feature_config,
+ u32 n_feature_config_bytes)
+{
+ vlib_worker_thread_barrier_sync (vm);
+ vnet_feature_enable_disable (arc_name, node_name, sw_if_index,
+ enable_disable, feature_config,
+ n_feature_config_bytes);
+ vlib_worker_thread_barrier_release (vm);
+}
+
+static void
+arping_vec_validate (vlib_main_t *vm, u32 sw_if_index)
+{
+ arping_main_t *am = &arping_main;
+
+ if (sw_if_index >= vec_len (am->interfaces))
+ {
+ vlib_worker_thread_barrier_sync (vm);
+ vec_validate (am->interfaces, sw_if_index);
+ vlib_worker_thread_barrier_release (vm);
+ }
+}
+
+static clib_error_t *
+arping_neighbor_probe_dst (vlib_main_t *vm, arping_args_t *args)
+{
+ arping_main_t *am = &arping_main;
+ u32 send_count = 0;
+ clib_error_t *error;
+ arping_intf_t aif;
+
+ /* Disallow multiple sends on the same interface for now. Who needs it? */
+ if (am->interfaces && (am->interfaces[args->sw_if_index] != 0))
+ {
+ error = clib_error_return (
+ 0, "arping command is in progress for the same interface. "
+ "Please try again later.");
+ args->rv = VNET_API_ERROR_INVALID_VALUE;
+ return error;
+ }
+
+ arping_vec_validate (vm, args->sw_if_index);
+ clib_memset (&aif, 0, sizeof (aif));
+ aif.interval = args->interval;
+ aif.repeat = args->repeat;
+ aif.reply_count = 0;
+ am->interfaces[args->sw_if_index] = &aif;
+
+ clib_memcpy (&aif.address, &args->address, sizeof (aif.address));
+ if (args->address.version == AF_IP4)
+ arping_vnet_feature_enable_disable (vm, "arp", "arping-input",
+ args->sw_if_index, 1, 0, 0);
+ else
+ arping_vnet_feature_enable_disable (vm, "ip6-local", "arping6-input",
+ args->sw_if_index, 1, 0, 0);
+
+ while (args->repeat > 0)
+ {
+ send_count++;
+ if (args->address.version == AF_IP4)
+ {
+ if (args->silence == 0)
+ vlib_cli_output (vm, "Sending %u ARP Request to %U", send_count,
+ format_ip4_address, &args->address.ip.ip4);
+ ip4_neighbor_probe_dst (args->sw_if_index, &args->address.ip.ip4);
+ }
+ else
+ {
+ if (args->silence == 0)
+ vlib_cli_output (vm, "Sending %u Neighbor Solicitation to %U",
+ send_count, format_ip6_address,
+ &args->address.ip.ip6);
+ ip6_neighbor_probe_dst (args->sw_if_index, &args->address.ip.ip6);
+ }
+ args->repeat--;
+ if ((args->interval > 0.0) && (args->repeat > 0))
+ vlib_process_suspend (vm, args->interval);
+ }
+
+ /* wait for a second on the reply */
+ u32 wait_count = 0;
+ while ((aif.reply_count < send_count) && (wait_count < 10))
+ {
+ vlib_process_suspend (vm, 0.1);
+ wait_count++;
+ }
+
+ if (args->address.version == AF_IP4)
+ {
+ clib_memcpy (&args->recv.from4, &aif.recv.from4,
+ sizeof (args->recv.from4));
+ arping_vnet_feature_enable_disable (vm, "arp", "arping-input",
+ args->sw_if_index, 0, 0, 0);
+ }
+ else
+ {
+ clib_memcpy (&args->recv.from6, &aif.recv.from6,
+ sizeof (args->recv.from6));
+ arping_vnet_feature_enable_disable (vm, "ip6-local", "arping6-input",
+ args->sw_if_index, 0, 0, 0);
+ }
+ args->reply_count = aif.reply_count;
+
+ am->interfaces[args->sw_if_index] = 0;
+
+ return 0;
+}
+
+void
+arping_run_command (vlib_main_t *vm, arping_args_t *args)
+{
+ if (args->is_garp)
+ args->error = arping_neighbor_advertisement (vm, args);
+ else
+ args->error = arping_neighbor_probe_dst (vm, args);
+}
+
+static clib_error_t *
+arping_ip_address (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ clib_error_t *error = 0;
+ vnet_main_t *vnm = vnet_get_main ();
+ arping_args_t args = { 0 };
+ f64 interval = ARPING_DEFAULT_INTERVAL;
+
+ args.repeat = ARPING_DEFAULT_REPEAT;
+ args.interval = ARPING_DEFAULT_INTERVAL;
+ args.sw_if_index = ~0;
+ args.silence = 0;
+
+ if (unformat (input, "gratuitous"))
+ args.is_garp = 1;
+
+ if (unformat (input, "%U", unformat_ip4_address, &args.address.ip.ip4))
+ args.address.version = AF_IP4;
+ else if (unformat (input, "%U", unformat_ip6_address, &args.address.ip.ip6))
+ args.address.version = AF_IP6;
+ else
+ {
+ error = clib_error_return (
+ 0,
+ "expecting IP4/IP6 address `%U'. Usage: arping [gratuitous] <addr> "
+ "<intf> [repeat <count>] [interval <secs>]",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ if (!unformat_user (input, unformat_vnet_sw_interface, vnm,
+ &args.sw_if_index))
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ /* parse the rest of the parameters in a cycle */
+ while (!unformat_eof (input, NULL))
+ {
+ if (unformat (input, "interval"))
+ {
+ if (!unformat (input, "%f", &interval))
+ {
+ error = clib_error_return (
+ 0, "expecting interval (floating point number) got `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ args.interval = interval;
+ }
+ else if (unformat (input, "repeat"))
+ {
+ if (!unformat (input, "%u", &args.repeat))
+ {
+ error =
+ clib_error_return (0, "expecting repeat count but got `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ }
+
+ arping_run_command (vm, &args);
+
+ if (args.reply_count)
+ {
+ if (args.address.version == AF_IP4)
+ vlib_cli_output (vm, "Received %u ARP Replies from %U (%U)",
+ args.reply_count, format_mac_address,
+ &args.recv.from4.mac, format_ip4_address,
+ &args.recv.from4.ip4);
+ else
+ vlib_cli_output (
+ vm, "Received %u ICMP6 neighbor advertisements from %U (%U)",
+ args.reply_count, format_mac_address, &args.recv.from6.mac,
+ format_ip6_address, &args.recv.from6.ip6);
+ }
+ else if (args.is_garp == 0)
+ vlib_cli_output (vm, "Received 0 Reply");
+
+ error = args.error;
+done:
+ return error;
+}
+// clang-format off
+/*?
+ * This command sends an ARP REQUEST or gratuitous ARP to network hosts. The
+ * address can be an IPv4 or IPv6 address.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of how to send an IPv4 ARP REQUEST
+ * @cliexstart{arping 100.1.1.10 VirtualEthernet0/0/0 repeat 3 interval 1}
+ * Sending 1 ARP Request to 100.1.1.10
+ * Sending 2 ARP Request to 100.1.1.10
+ * Sending 3 ARP Request to 100.1.1.10
+ * Received 3 ARP Replies from 52:53:00:00:04:01 (100.1.1.10)
+ * @cliexend
+ *
+ * Example of how to send an IPv6 Neighbor Solicitation
+ * @cliexstart{arping 2001:192::2 VirtualEthernet0/0/0 repeat 3 interval 1}
+ * Sending 1 Neighbor Solicitation to 2001:192::2
+ * Sending 2 Neighbor Solicitation to 2001:192::2
+ * Sending 3 Neighbor Solicitation to 2001:192::2
+ * Received 3 ICMP6 neighbor advertisements from 52:53:00:00:04:01 (2001:192::2)
+ * @cliexend
+ *
+ * Example of how to send an IPv4 gratuitous ARP
+ * @cliexstart{arping gratuitous 100.1.1.100 VirtualEthernet0/0/0 repeat 2}
+ * Sending 1 GARP to 100.1.1.100
+ * Sending 2 GARP to 100.1.1.100
+ * @cliexend
+ * @endparblock
+ *
+?*/
+// clang-format on
+VLIB_CLI_COMMAND (arping_command, static) = {
+ .path = "arping",
+ .function = arping_ip_address,
+ .short_help = "arping [gratuitous] {addr} {interface}"
+ " [interval {sec}] [repeat {cnt}]",
+ .is_mp_safe = 1,
+};
+
+static clib_error_t *
+arping_cli_init (vlib_main_t *vm)
+{
+ /* initialize binary API */
+ arping_plugin_api_hookup (vm);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (arping_cli_init);
+
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "Arping (arping)",
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+from scapy.layers.l2 import ARP
+from scapy.layers.inet6 import ICMPv6ND_NS, ICMPv6ND_NA, IPv6
+
+from framework import VppTestCase
+
+""" TestArping is a subclass of VPPTestCase classes.
+
+Basic test for sanity check of arping.
+
+"""
+
+
+class TestArping(VppTestCase):
+ """ Arping Test Case """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestArping, cls).setUpClass()
+ try:
+ cls.create_pg_interfaces(range(2))
+ cls.interfaces = list(cls.pg_interfaces)
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.config_ip6()
+ i.disable_ipv6_ra()
+ i.resolve_arp()
+ i.resolve_ndp()
+ except Exception:
+ super(TestArping, cls).tearDownClass()
+ raise
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestArping, cls).tearDownClass()
+
+ def tearDown(self):
+ super(TestArping, self).tearDown()
+
+ def show_commands_at_teardown(self):
+ self.logger.info(self.vapi.cli("show hardware"))
+
+ def verify_arping_request(self, p, src, dst):
+ arp = p[ARP]
+ self.assertEqual(arp.hwtype, 0x0001)
+ self.assertEqual(arp.ptype, 0x0800)
+ self.assertEqual(arp.hwlen, 6)
+ self.assertEqual(arp.op, 1)
+ self.assertEqual(arp.psrc, src)
+ self.assertEqual(arp.pdst, dst)
+
+ def verify_arping_ip6_ns(self, p, src, dst):
+ icmpv6 = p[ICMPv6ND_NS]
+ self.assertEqual(icmpv6.type, 135)
+ self.assertEqual(icmpv6.tgt, dst)
+ ipv6 = p[IPv6]
+ self.assertEqual(src, ipv6.src)
+
+ def verify_arping_ip6_na(self, p, src, dst):
+ icmpv6 = p[ICMPv6ND_NA]
+ self.assertEqual(icmpv6.type, 136)
+ self.assertEqual(icmpv6.tgt, dst)
+ ipv6 = p[IPv6]
+ self.assertEqual(src, ipv6.src)
+
+ def test_arping_ip4_arp_request_cli(self):
+ """ arping IP4 arp request CLI test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ remote_ip4 = self.pg1.remote_ip4
+
+ ping_cmd = "arping " + remote_ip4 + "pg1 repeat 5 interval 0.1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ ping_cmd = "arping " + remote_ip4 + "pg1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_request(p, self.pg1.local_ip4,
+ self.pg1.remote_ip4)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip4_garp_cli(self):
+ """ arping ip4 gratuitous arp CLI test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ ping_cmd = ("arping gratuitous" + self.pg1.local_ip4 +
+ "pg1 repeat 5 interval 0.1")
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ ping_cmd = "arping gratuitous" + self.pg1.local_ip4 + "pg1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_request(p, self.pg1.local_ip4,
+ self.pg1.local_ip4)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip4_arp_request_api(self):
+ """ arping ip4 arp request API test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ remote_ip4 = self.pg1.remote_ip4
+
+ ret = self.vapi.arping(address=remote_ip4,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=0, repeat=5, interval=0.1)
+ self.logger.info(ret)
+
+ ret = self.vapi.arping(address=remote_ip4,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=0)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_request(p, self.pg1.local_ip4,
+ self.pg1.remote_ip4)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip4_garp_api(self):
+ """ arping ip4 gratuitous arp API test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ ret = self.vapi.arping(address=self.pg1.local_ip4,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=1, repeat=5, interval=0.1)
+ self.logger.info(ret)
+
+ ret = self.vapi.arping(address=self.pg1.local_ip4,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=1)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_request(p, self.pg1.local_ip4,
+ self.pg1.local_ip4)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip6_ns_cli(self):
+ """ arping IP6 neighbor solicitation CLI test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ remote_ip6 = self.pg1.remote_ip6
+
+ ping_cmd = "arping " + remote_ip6 + "pg1 repeat 5 interval 0.1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ ping_cmd = "arping " + remote_ip6 + "pg1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_ip6_ns(p, self.pg1.local_ip6,
+ self.pg1.remote_ip6)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip6_ns_api(self):
+ """ arping ip6 neighbor solicitation API test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ remote_ip6 = self.pg1.remote_ip6
+
+ ret = self.vapi.arping(address=remote_ip6,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=0, repeat=5, interval=0.1)
+ self.logger.info(ret)
+
+ ret = self.vapi.arping(address=remote_ip6,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=0)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_ip6_ns(p, self.pg1.local_ip6,
+ self.pg1.remote_ip6)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip6_na_cli(self):
+ """ arping ip6 neighbor advertisement CLI test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ ping_cmd = ("arping gratuitous" + self.pg1.local_ip6 +
+ "pg1 repeat 5 interval 0.1")
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ ping_cmd = "arping gratuitous" + self.pg1.local_ip6 + "pg1"
+ ret = self.vapi.cli(ping_cmd)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_ip6_na(p, self.pg1.local_ip6,
+ self.pg1.local_ip6)
+ finally:
+ self.vapi.cli("show error")
+
+ def test_arping_ip6_na_api(self):
+ """ arping ip6 neighbor advertisement API test """
+ try:
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ ret = self.vapi.arping(address=self.pg1.local_ip6,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=1, repeat=5, interval=0.1)
+ self.logger.info(ret)
+
+ ret = self.vapi.arping(address=self.pg1.local_ip6,
+ sw_if_index=self.pg1.sw_if_index,
+ is_garp=1)
+ self.logger.info(ret)
+
+ out = self.pg1.get_capture(6)
+ for p in out:
+ self.verify_arping_ip6_na(p, self.pg1.local_ip6,
+ self.pg1.local_ip6)
+ finally:
+ self.vapi.cli("show error")
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / commitdiff