7dc351f689
Mark arp packet as locally originated when probing/replying and don't apply any arp-term logic against it. Type: fix Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com> Change-Id: I305ff5cac8cac456decf92f21b961aa4ce286079
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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* Copyright (c) 2019 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __IP4_NEIGHBOR_H__
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#define __IP4_NEIGHBOR_H__
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#include <vnet/ip/ip.h>
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#include <vnet/ethernet/arp_packet.h>
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#include <vnet/ip-neighbor/ip_neighbor_types.h>
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extern void ip4_neighbor_probe_dst (u32 sw_if_index, u32 thread_index,
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const ip4_address_t *dst);
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extern void ip4_neighbor_advertise (vlib_main_t *vm, vnet_main_t *vnm,
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u32 sw_if_index, u32 thread_index,
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const ip4_address_t *addr);
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always_inline vlib_buffer_t *
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ip4_neighbor_probe (vlib_main_t *vm, vnet_main_t *vnm,
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const ip_adjacency_t *adj0, const ip4_address_t *src,
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const ip4_address_t *dst)
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{
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vnet_hw_interface_t *hw_if0;
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ethernet_arp_header_t *h0;
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vlib_buffer_t *b0;
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u32 bi0;
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hw_if0 = vnet_get_sup_hw_interface (vnm, adj0->rewrite_header.sw_if_index);
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/* if (NULL == hw_if0->hw_address) */
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/* return (NULL); */
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/* Send ARP request. */
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h0 = vlib_packet_template_get_packet (vm,
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&ip4_main.ip4_arp_request_packet_template,
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&bi0);
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/* Seems we're out of buffers */
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if (PREDICT_FALSE (!h0))
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return (NULL);
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b0 = vlib_get_buffer (vm, bi0);
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/* Add rewrite/encap string for ARP packet. */
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vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
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/* Src ethernet address in ARP header. */
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mac_address_from_bytes (&h0->ip4_over_ethernet[0].mac, hw_if0->hw_address);
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h0->ip4_over_ethernet[0].ip4 = *src;
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h0->ip4_over_ethernet[1].ip4 = *dst;
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vnet_buffer (b0)->sw_if_index[VLIB_TX] = adj0->rewrite_header.sw_if_index;
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b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
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vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
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{
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vlib_frame_t *f = vlib_get_frame_to_node (vm, hw_if0->output_node_index);
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u32 *to_next = vlib_frame_vector_args (f);
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to_next[0] = bi0;
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f->n_vectors = 1;
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vlib_put_frame_to_node (vm, hw_if0->output_node_index, f);
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}
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vlib_increment_simple_counter (
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&ip_neighbor_counters[AF_IP4].ipnc[VLIB_TX][IP_NEIGHBOR_CTR_REQUEST],
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vm->thread_index, adj0->rewrite_header.sw_if_index, 1);
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return b0;
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}
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#endif
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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