FD.io VPP  v20.01-48-g3e0dafb74
Vector Packet Processing
ip4_neighbor.h
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1 /*
2  * Copyright (c) 2019 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef __IP4_NEIGHBOR_H__
17 #define __IP4_NEIGHBOR_H__
18 
19 #include <vnet/ip/ip.h>
21 
22 extern void ip4_neighbor_probe_dst (const ip_adjacency_t * adj,
23  const ip4_address_t * dst);
25  vnet_main_t * vnm,
27  const ip4_address_t * addr);
28 
31  vnet_main_t * vnm,
32  const ip_adjacency_t * adj0,
33  const ip4_address_t * src, const ip4_address_t * dst)
34 {
35  vnet_hw_interface_t *hw_if0;
37  vlib_buffer_t *b0;
38  u32 bi0;
39 
40  /* Send ARP request. */
43  &bi0);
44  /* Seems we're out of buffers */
45  if (PREDICT_FALSE (!h0))
46  return (NULL);
47 
48  b0 = vlib_get_buffer (vm, bi0);
49 
50  /* Add rewrite/encap string for ARP packet. */
51  vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
52 
53  hw_if0 = vnet_get_sup_hw_interface (vnm, adj0->rewrite_header.sw_if_index);
54 
55  /* Src ethernet address in ARP header. */
57 
58  h0->ip4_over_ethernet[0].ip4 = *src;
59  h0->ip4_over_ethernet[1].ip4 = *dst;
60 
62  vnet_buffer (b0)->sw_if_index[VLIB_TX] = adj0->rewrite_header.sw_if_index;
63 
64  vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
65 
66  {
68  u32 *to_next = vlib_frame_vector_args (f);
69  to_next[0] = bi0;
70  f->n_vectors = 1;
72  }
73 
74  return b0;
75 }
76 
77 #endif
78 
79 /*
80  * fd.io coding-style-patch-verification: ON
81  *
82  * Local Variables:
83  * eval: (c-set-style "gnu")
84  * End:
85  */
#define vnet_rewrite_one_header(rw0, p0, most_likely_size)
Definition: rewrite.h:200
void ip4_neighbor_advertise(vlib_main_t *vm, vnet_main_t *vnm, u32 sw_if_index, const ip4_address_t *addr)
Definition: ip4_neighbor.c:59
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
#define NULL
Definition: clib.h:58
IP unicast adjacency.
Definition: adj.h:221
vl_api_address_t src
Definition: gre.api:60
vhost_vring_addr_t addr
Definition: vhost_user.h:147
void * vlib_packet_template_get_packet(vlib_main_t *vm, vlib_packet_template_t *t, u32 *bi_result)
Definition: buffer.c:400
vl_api_interface_index_t sw_if_index
Definition: gre.api:59
ethernet_arp_ip4_over_ethernet_address_t ip4_over_ethernet[2]
Definition: arp_packet.h:142
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:185
unsigned int u32
Definition: types.h:88
static_always_inline void mac_address_from_bytes(mac_address_t *mac, const u8 *bytes)
Definition: mac_address.h:92
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:194
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define always_inline
Definition: ipsec.h:28
vl_api_address_t dst
Definition: gre.api:61
vlib_main_t * vm
Definition: in2out_ed.c:1810
u16 n_vectors
Definition: node.h:397
static 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)
Definition: ip4_neighbor.h:30
vlib_packet_template_t ip4_arp_request_packet_template
Template used to generate IP4 ARP packets.
Definition: ip4.h:149
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
Definition: defs.h:47
#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b)
Definition: buffer.h:492
VLIB buffer representation.
Definition: buffer.h:102
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
#define vnet_buffer(b)
Definition: buffer.h:408
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1079
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
void ip4_neighbor_probe_dst(const ip_adjacency_t *adj, const ip4_address_t *dst)
Definition: ip4_neighbor.c:44