From cbe25aab3be72154f2c706c39eeba6a77f34450f Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Mon, 30 Sep 2019 10:53:31 +0000 Subject: ip: Protocol Independent IP Neighbors Type: feature - ip-neighbour: generic neighbour handling; APIs, DBs, event handling, aging - arp: ARP protocol implementation - ip6-nd; IPv6 neighbor discovery implementation; separate ND, MLD, RA - ip6-link; manage link-local addresses - l2-arp-term; events separated from IP neighbours, since they are not the same. vnet retains just enough education to perform ND/ARP packet construction. arp and ip6-nd to be moved to plugins soon. Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe Signed-off-by: Neale Ranns --- src/vnet/ip-neighbor/ip4_neighbor.h | 85 +++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 src/vnet/ip-neighbor/ip4_neighbor.h (limited to 'src/vnet/ip-neighbor/ip4_neighbor.h') diff --git a/src/vnet/ip-neighbor/ip4_neighbor.h b/src/vnet/ip-neighbor/ip4_neighbor.h new file mode 100644 index 00000000000..c52e2d446af --- /dev/null +++ b/src/vnet/ip-neighbor/ip4_neighbor.h @@ -0,0 +1,85 @@ +/* + * 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 __IP4_NEIGHBOR_H__ +#define __IP4_NEIGHBOR_H__ + +#include +#include + +extern void ip4_neighbor_probe_dst (const ip_adjacency_t * adj, + const ip4_address_t * dst); +extern void ip4_neighbor_advertise (vlib_main_t * vm, + vnet_main_t * vnm, + u32 sw_if_index, + const ip4_address_t * addr); + +always_inline vlib_buffer_t * +ip4_neighbor_probe (vlib_main_t * vm, + vnet_main_t * vnm, + const ip_adjacency_t * adj0, + const ip4_address_t * src, const ip4_address_t * dst) +{ + vnet_hw_interface_t *hw_if0; + ethernet_arp_header_t *h0; + vlib_buffer_t *b0; + u32 bi0; + + /* Send ARP request. */ + h0 = vlib_packet_template_get_packet (vm, + &ip4_main.ip4_arp_request_packet_template, + &bi0); + /* Seems we're out of buffers */ + if (PREDICT_FALSE (!h0)) + return (NULL); + + b0 = vlib_get_buffer (vm, bi0); + + /* Add rewrite/encap string for ARP packet. */ + vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t)); + + hw_if0 = vnet_get_sup_hw_interface (vnm, adj0->rewrite_header.sw_if_index); + + /* Src ethernet address in ARP header. */ + mac_address_from_bytes (&h0->ip4_over_ethernet[0].mac, hw_if0->hw_address); + + h0->ip4_over_ethernet[0].ip4 = *src; + h0->ip4_over_ethernet[1].ip4 = *dst; + + VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); + vnet_buffer (b0)->sw_if_index[VLIB_TX] = adj0->rewrite_header.sw_if_index; + + vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes); + + { + vlib_frame_t *f = vlib_get_frame_to_node (vm, hw_if0->output_node_index); + u32 *to_next = vlib_frame_vector_args (f); + to_next[0] = bi0; + f->n_vectors = 1; + vlib_put_frame_to_node (vm, hw_if0->output_node_index, f); + } + + return b0; +} + +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg