fd2417b2a4
Type: feature stats of the like from: https://datatracker.ietf.org/doc/html/draft-ietf-rtgwg-arp-yang-model-03#section-4 Signed-off-by: Neale Ranns <neale@graphiant.com> Change-Id: Icb1bf4f6f7e6ccc2f44b0008d4774b61cae96184
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
|
|
* ip/ip6_neighbor.h: IP6 NS transmit
|
|
*
|
|
* Copyright (c) 2019 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.
|
|
*/
|
|
|
|
#ifndef __IP6_NEIGHBOR_H__
|
|
#define __IP6_NEIGHBOR_H__
|
|
|
|
#include <vlib/vlib.h>
|
|
#include <vnet/ip/format.h>
|
|
#include <vnet/ip/ip6.h>
|
|
#include <vnet/ip/ip6_link.h>
|
|
#include <vnet/ip/icmp46_packet.h>
|
|
#include <vnet/ethernet/ethernet.h>
|
|
#include <vnet/adj/adj_internal.h>
|
|
#include <vnet/ip-neighbor/ip_neighbor_types.h>
|
|
|
|
/* Template used to generate IP6 neighbor solicitation packets. */
|
|
extern vlib_packet_template_t ip6_neighbor_packet_template;
|
|
|
|
extern void ip6_neighbor_advertise (vlib_main_t *vm, vnet_main_t *vnm,
|
|
u32 sw_if_index, u32 thread_index,
|
|
const ip6_address_t *addr);
|
|
|
|
extern void ip6_neighbor_probe_dst (u32 sw_if_index, u32 thread_index,
|
|
const ip6_address_t *dst);
|
|
|
|
always_inline vlib_buffer_t *
|
|
ip6_neighbor_probe (vlib_main_t *vm, vnet_main_t *vnm, u32 sw_if_index,
|
|
u32 thread_index, const ip6_address_t *src,
|
|
const ip6_address_t *dst)
|
|
{
|
|
icmp6_neighbor_solicitation_header_t *h0;
|
|
vnet_hw_interface_t *hw_if0;
|
|
const ip_adjacency_t *adj;
|
|
vlib_buffer_t *b0;
|
|
int bogus_length;
|
|
u32 bi0 = 0;
|
|
|
|
h0 = vlib_packet_template_get_packet
|
|
(vm, &ip6_neighbor_packet_template, &bi0);
|
|
if (!h0)
|
|
return NULL;
|
|
|
|
/* if the interface has been disabled for ip6, later steps to retrieve
|
|
* an adjacency will result in a segv.
|
|
*/
|
|
if (!ip6_link_is_enabled (sw_if_index))
|
|
return NULL;
|
|
|
|
b0 = vlib_get_buffer (vm, bi0);
|
|
|
|
hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
|
|
|
|
/*
|
|
* Destination address is a solicited node multicast address.
|
|
* We need to fill in
|
|
* the low 24 bits with low 24 bits of target's address.
|
|
*/
|
|
h0->ip.src_address = *src;
|
|
h0->ip.dst_address.as_u8[13] = dst->as_u8[13];
|
|
h0->ip.dst_address.as_u8[14] = dst->as_u8[14];
|
|
h0->ip.dst_address.as_u8[15] = dst->as_u8[15];
|
|
|
|
h0->neighbor.target_address = *dst;
|
|
|
|
clib_memcpy (h0->link_layer_option.ethernet_address,
|
|
hw_if0->hw_address, vec_len (hw_if0->hw_address));
|
|
|
|
/* $$$$ appears we need this; why is the checksum non-zero? */
|
|
h0->neighbor.icmp.checksum = 0;
|
|
h0->neighbor.icmp.checksum =
|
|
ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip, &bogus_length);
|
|
|
|
ASSERT (bogus_length == 0);
|
|
|
|
vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
|
|
|
|
/* Use the link's mcast adj to ship the packet */
|
|
vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
|
|
ip6_link_get_mcast_adj (sw_if_index);
|
|
adj = adj_get (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
|
|
|
|
b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
|
|
|
|
{
|
|
vlib_frame_t *f = vlib_get_frame_to_node (vm, adj->ia_node_index);
|
|
u32 *to_next = vlib_frame_vector_args (f);
|
|
to_next[0] = bi0;
|
|
f->n_vectors = 1;
|
|
vlib_put_frame_to_node (vm, adj->ia_node_index, f);
|
|
}
|
|
|
|
vlib_increment_simple_counter (
|
|
&ip_neighbor_counters[AF_IP6].ipnc[VLIB_TX][IP_NEIGHBOR_CTR_REQUEST],
|
|
thread_index, sw_if_index, 1);
|
|
|
|
return b0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* fd.io coding-style-patch-verification: ON
|
|
*
|
|
* Local Variables:
|
|
* eval: (c-set-style "gnu")
|
|
* End:
|
|
*/
|