Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ethernet/arp.c: IP v4 ARP node |
| 3 | * |
| 4 | * Copyright (c) 2010 Cisco and/or its affiliates. |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at: |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <vnet/ip/ip.h> |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 19 | #include <vnet/ip/ip_neighbor.h> |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 20 | #include <vnet/ip/ip6.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 21 | #include <vnet/ethernet/ethernet.h> |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 22 | #include <vnet/ethernet/arp.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 23 | #include <vnet/l2/l2_input.h> |
| 24 | #include <vppinfra/mhash.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 25 | #include <vnet/fib/ip4_fib.h> |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 26 | #include <vnet/fib/fib_entry_src.h> |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 27 | #include <vnet/adj/adj_nbr.h> |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 28 | #include <vnet/adj/adj_mcast.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 29 | #include <vnet/mpls/mpls.h> |
Neale Ranns | 3b81a1e | 2018-09-06 09:50:26 -0700 | [diff] [blame] | 30 | #include <vnet/l2/feat_bitmap.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 31 | |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 32 | /** |
| 33 | * @file |
| 34 | * @brief IPv4 ARP. |
| 35 | * |
| 36 | * This file contains code to manage the IPv4 ARP tables (IP Address |
| 37 | * to MAC Address lookup). |
| 38 | */ |
| 39 | |
| 40 | |
Dave Barach | f9bd620 | 2015-12-14 13:22:11 -0500 | [diff] [blame] | 41 | void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); |
| 42 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 43 | /** |
| 44 | * @brief Per-interface ARP configuration and state |
| 45 | */ |
| 46 | typedef struct ethernet_arp_interface_t_ |
| 47 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 48 | /** |
| 49 | * Hash table of ARP entries. |
| 50 | * Since this hash table is per-interface, the key is only the IPv4 address. |
| 51 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 52 | uword *arp_entries; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 53 | } ethernet_arp_interface_t; |
| 54 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 55 | typedef struct |
| 56 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 57 | ip4_address_t lo_addr; |
| 58 | ip4_address_t hi_addr; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 59 | u32 fib_index; |
| 60 | } ethernet_proxy_arp_t; |
| 61 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 62 | typedef struct |
| 63 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 64 | u32 next_index; |
| 65 | uword node_index; |
| 66 | uword type_opaque; |
| 67 | uword data; |
| 68 | /* Used for arp event notification only */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 69 | arp_change_event_cb_t data_callback; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 70 | u32 pid; |
| 71 | } pending_resolution_t; |
| 72 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 73 | typedef struct |
| 74 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 75 | /* Hash tables mapping name to opcode. */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 76 | uword *opcode_by_name; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 77 | |
| 78 | /* lite beer "glean" adjacency handling */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 79 | uword *pending_resolutions_by_address; |
| 80 | pending_resolution_t *pending_resolutions; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 81 | |
| 82 | /* Mac address change notification */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 83 | uword *mac_changes_by_address; |
| 84 | pending_resolution_t *mac_changes; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 85 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 86 | ethernet_arp_ip4_entry_t *ip4_entry_pool; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 87 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 88 | /* ARP attack mitigation */ |
| 89 | u32 arp_delete_rotor; |
| 90 | u32 limit_arp_cache_size; |
| 91 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 92 | /** Per interface state */ |
| 93 | ethernet_arp_interface_t *ethernet_arp_by_sw_if_index; |
| 94 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 95 | /* Proxy arp vector */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 96 | ethernet_proxy_arp_t *proxy_arps; |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 97 | |
| 98 | uword wc_ip4_arp_publisher_node; |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 99 | uword wc_ip4_arp_publisher_et; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 100 | } ethernet_arp_main_t; |
| 101 | |
| 102 | static ethernet_arp_main_t ethernet_arp_main; |
| 103 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 104 | typedef struct |
| 105 | { |
| 106 | u32 sw_if_index; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 107 | ip4_address_t ip4; |
| 108 | mac_address_t mac; |
| 109 | ip_neighbor_flags_t nbr_flags; |
| 110 | u32 flags; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 111 | #define ETHERNET_ARP_ARGS_REMOVE (1<<0) |
| 112 | #define ETHERNET_ARP_ARGS_FLUSH (1<<1) |
| 113 | #define ETHERNET_ARP_ARGS_POPULATE (1<<2) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 114 | #define ETHERNET_ARP_ARGS_WC_PUB (1<<3) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 115 | } vnet_arp_set_ip4_over_ethernet_rpc_args_t; |
| 116 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 117 | static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 }; |
| 118 | |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 119 | /* Node index for send_garp_na_process */ |
| 120 | u32 send_garp_na_process_node_index; |
| 121 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 122 | static void |
| 123 | set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 124 | * a); |
| 125 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 126 | static u8 * |
| 127 | format_ethernet_arp_hardware_type (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 128 | { |
| 129 | ethernet_arp_hardware_type_t h = va_arg (*va, ethernet_arp_hardware_type_t); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 130 | char *t = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 131 | switch (h) |
| 132 | { |
| 133 | #define _(n,f) case n: t = #f; break; |
| 134 | foreach_ethernet_arp_hardware_type; |
| 135 | #undef _ |
| 136 | |
| 137 | default: |
| 138 | return format (s, "unknown 0x%x", h); |
| 139 | } |
| 140 | |
| 141 | return format (s, "%s", t); |
| 142 | } |
| 143 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 144 | static u8 * |
| 145 | format_ethernet_arp_opcode (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 146 | { |
| 147 | ethernet_arp_opcode_t o = va_arg (*va, ethernet_arp_opcode_t); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 148 | char *t = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 149 | switch (o) |
| 150 | { |
| 151 | #define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break; |
| 152 | foreach_ethernet_arp_opcode; |
| 153 | #undef _ |
| 154 | |
| 155 | default: |
| 156 | return format (s, "unknown 0x%x", o); |
| 157 | } |
| 158 | |
| 159 | return format (s, "%s", t); |
| 160 | } |
| 161 | |
| 162 | static uword |
| 163 | unformat_ethernet_arp_opcode_host_byte_order (unformat_input_t * input, |
| 164 | va_list * args) |
| 165 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 166 | int *result = va_arg (*args, int *); |
| 167 | ethernet_arp_main_t *am = ðernet_arp_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 168 | int x, i; |
| 169 | |
| 170 | /* Numeric opcode. */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 171 | if (unformat (input, "0x%x", &x) || unformat (input, "%d", &x)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 172 | { |
| 173 | if (x >= (1 << 16)) |
| 174 | return 0; |
| 175 | *result = x; |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | /* Named type. */ |
| 180 | if (unformat_user (input, unformat_vlib_number_by_name, |
| 181 | am->opcode_by_name, &i)) |
| 182 | { |
| 183 | *result = i; |
| 184 | return 1; |
| 185 | } |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static uword |
| 191 | unformat_ethernet_arp_opcode_net_byte_order (unformat_input_t * input, |
| 192 | va_list * args) |
| 193 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 194 | int *result = va_arg (*args, int *); |
| 195 | if (!unformat_user |
| 196 | (input, unformat_ethernet_arp_opcode_host_byte_order, result)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 197 | return 0; |
| 198 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 199 | *result = clib_host_to_net_u16 ((u16) * result); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 200 | return 1; |
| 201 | } |
| 202 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 203 | static u8 * |
| 204 | format_ethernet_arp_header (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 205 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 206 | ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 207 | u32 max_header_bytes = va_arg (*va, u32); |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 208 | u32 indent; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 209 | u16 l2_type, l3_type; |
| 210 | |
| 211 | if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes) |
| 212 | return format (s, "ARP header truncated"); |
| 213 | |
| 214 | l2_type = clib_net_to_host_u16 (a->l2_type); |
| 215 | l3_type = clib_net_to_host_u16 (a->l3_type); |
| 216 | |
| 217 | indent = format_get_indent (s); |
| 218 | |
| 219 | s = format (s, "%U, type %U/%U, address size %d/%d", |
| 220 | format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode), |
| 221 | format_ethernet_arp_hardware_type, l2_type, |
| 222 | format_ethernet_type, l3_type, |
| 223 | a->n_l2_address_bytes, a->n_l3_address_bytes); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 224 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 225 | if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet |
| 226 | && l3_type == ETHERNET_TYPE_IP4) |
| 227 | { |
| 228 | s = format (s, "\n%U%U/%U -> %U/%U", |
| 229 | format_white_space, indent, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 230 | format_mac_address_t, &a->ip4_over_ethernet[0].mac, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 231 | format_ip4_address, &a->ip4_over_ethernet[0].ip4, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 232 | format_mac_address_t, &a->ip4_over_ethernet[1].mac, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 233 | format_ip4_address, &a->ip4_over_ethernet[1].ip4); |
| 234 | } |
| 235 | else |
| 236 | { |
| 237 | uword n2 = a->n_l2_address_bytes; |
| 238 | uword n3 = a->n_l3_address_bytes; |
| 239 | s = format (s, "\n%U%U/%U -> %U/%U", |
| 240 | format_white_space, indent, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 241 | format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2, |
| 242 | format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3, |
| 243 | format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2, |
| 244 | format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | return s; |
| 248 | } |
| 249 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 250 | u8 * |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 251 | format_ethernet_arp_ip4_entry (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 252 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 253 | vnet_main_t *vnm = va_arg (*va, vnet_main_t *); |
| 254 | ethernet_arp_ip4_entry_t *e = va_arg (*va, ethernet_arp_ip4_entry_t *); |
| 255 | vnet_sw_interface_t *si; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 256 | u8 *flags = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 257 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 258 | if (!e) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 259 | return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 260 | "Flags", "Ethernet", "Interface"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 261 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 262 | si = vnet_get_sw_interface (vnm, e->sw_if_index); |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 263 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 264 | if (e->flags & IP_NEIGHBOR_FLAG_STATIC) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 265 | flags = format (flags, "S"); |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 266 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 267 | if (e->flags & IP_NEIGHBOR_FLAG_DYNAMIC) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 268 | flags = format (flags, "D"); |
| 269 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 270 | if (e->flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY) |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 271 | flags = format (flags, "N"); |
| 272 | |
Neale Ranns | 5c994c1 | 2017-08-04 06:22:23 -0700 | [diff] [blame] | 273 | s = format (s, "%=12U%=16U%=6s%=20U%U", |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 274 | format_vlib_time, vnm->vlib_main, e->time_last_updated, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 275 | format_ip4_address, &e->ip4_address, |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 276 | flags ? (char *) flags : "", |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 277 | format_mac_address_t, &e->mac, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 278 | format_vnet_sw_interface_name, vnm, si); |
| 279 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 280 | vec_free (flags); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 281 | return s; |
| 282 | } |
| 283 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 284 | typedef struct |
| 285 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 286 | u8 packet_data[64]; |
| 287 | } ethernet_arp_input_trace_t; |
| 288 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 289 | static u8 * |
| 290 | format_ethernet_arp_input_trace (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 291 | { |
| 292 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); |
| 293 | CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 294 | ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 295 | |
| 296 | s = format (s, "%U", |
| 297 | format_ethernet_arp_header, |
| 298 | t->packet_data, sizeof (t->packet_data)); |
| 299 | |
| 300 | return s; |
| 301 | } |
| 302 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 303 | static u8 * |
| 304 | format_arp_term_input_trace (u8 * s, va_list * va) |
| 305 | { |
| 306 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); |
| 307 | CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); |
| 308 | ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *); |
| 309 | |
| 310 | /* arp-term trace data saved is either arp or ip6/icmp6 packet: |
| 311 | - for arp, the 1st 16-bit field is hw type of value of 0x0001. |
| 312 | - for ip6, the first nibble has value of 6. */ |
| 313 | s = format (s, "%U", t->packet_data[0] == 0 ? |
| 314 | format_ethernet_arp_header : format_ip6_header, |
| 315 | t->packet_data, sizeof (t->packet_data)); |
| 316 | |
| 317 | return s; |
| 318 | } |
| 319 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 320 | static void |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 321 | arp_nbr_probe (ip_adjacency_t * adj) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 322 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 323 | vnet_main_t *vnm = vnet_get_main (); |
| 324 | ip4_main_t *im = &ip4_main; |
| 325 | ip_interface_address_t *ia; |
| 326 | ethernet_arp_header_t *h; |
| 327 | vnet_hw_interface_t *hi; |
| 328 | vnet_sw_interface_t *si; |
| 329 | ip4_address_t *src; |
| 330 | vlib_buffer_t *b; |
| 331 | vlib_main_t *vm; |
| 332 | u32 bi = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 333 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 334 | vm = vlib_get_main (); |
John Lo | cbec1a1 | 2016-07-05 18:34:40 -0400 | [diff] [blame] | 335 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 336 | si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index); |
| 337 | |
| 338 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 339 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 340 | return; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 341 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 342 | |
| 343 | src = |
| 344 | ip4_interface_address_matching_destination (im, |
| 345 | &adj->sub_type.nbr.next_hop. |
| 346 | ip4, |
| 347 | adj->rewrite_header. |
| 348 | sw_if_index, &ia); |
| 349 | if (!src) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 350 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 351 | return; |
| 352 | } |
| 353 | |
| 354 | h = |
| 355 | vlib_packet_template_get_packet (vm, &im->ip4_arp_request_packet_template, |
| 356 | &bi); |
John Lo | 084606b | 2018-06-19 15:27:48 -0400 | [diff] [blame] | 357 | if (!h) |
| 358 | return; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 359 | |
| 360 | hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index); |
| 361 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 362 | mac_address_from_bytes (&h->ip4_over_ethernet[0].mac, hi->hw_address); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 363 | |
| 364 | h->ip4_over_ethernet[0].ip4 = src[0]; |
| 365 | h->ip4_over_ethernet[1].ip4 = adj->sub_type.nbr.next_hop.ip4; |
| 366 | |
| 367 | b = vlib_get_buffer (vm, bi); |
| 368 | vnet_buffer (b)->sw_if_index[VLIB_RX] = |
| 369 | vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index; |
| 370 | |
| 371 | /* Add encapsulation string for software interface (e.g. ethernet header). */ |
| 372 | vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t)); |
| 373 | vlib_buffer_advance (b, -adj->rewrite_header.data_bytes); |
| 374 | |
| 375 | { |
| 376 | vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); |
| 377 | u32 *to_next = vlib_frame_vector_args (f); |
| 378 | to_next[0] = bi; |
| 379 | f->n_vectors = 1; |
| 380 | vlib_put_frame_to_node (vm, hi->output_node_index, f); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | static void |
| 385 | arp_mk_complete (adj_index_t ai, ethernet_arp_ip4_entry_t * e) |
| 386 | { |
| 387 | adj_nbr_update_rewrite |
| 388 | (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 389 | ethernet_build_rewrite (vnet_get_main (), |
| 390 | e->sw_if_index, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 391 | adj_get_link_type (ai), &e->mac)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | static void |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 395 | arp_mk_incomplete (adj_index_t ai) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 396 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 397 | ip_adjacency_t *adj = adj_get (ai); |
| 398 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 399 | adj_nbr_update_rewrite |
| 400 | (ai, |
| 401 | ADJ_NBR_REWRITE_FLAG_INCOMPLETE, |
| 402 | ethernet_build_rewrite (vnet_get_main (), |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 403 | adj->rewrite_header.sw_if_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 404 | VNET_LINK_ARP, |
| 405 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 406 | } |
| 407 | |
| 408 | static ethernet_arp_ip4_entry_t * |
| 409 | arp_entry_find (ethernet_arp_interface_t * eai, const ip4_address_t * addr) |
| 410 | { |
| 411 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 412 | ethernet_arp_ip4_entry_t *e = NULL; |
| 413 | uword *p; |
| 414 | |
| 415 | if (NULL != eai->arp_entries) |
| 416 | { |
| 417 | p = hash_get (eai->arp_entries, addr->as_u32); |
| 418 | if (!p) |
| 419 | return (NULL); |
| 420 | |
| 421 | e = pool_elt_at_index (am->ip4_entry_pool, p[0]); |
| 422 | } |
| 423 | |
| 424 | return (e); |
| 425 | } |
| 426 | |
| 427 | static adj_walk_rc_t |
| 428 | arp_mk_complete_walk (adj_index_t ai, void *ctx) |
| 429 | { |
| 430 | ethernet_arp_ip4_entry_t *e = ctx; |
| 431 | |
| 432 | arp_mk_complete (ai, e); |
| 433 | |
| 434 | return (ADJ_WALK_RC_CONTINUE); |
| 435 | } |
| 436 | |
| 437 | static adj_walk_rc_t |
| 438 | arp_mk_incomplete_walk (adj_index_t ai, void *ctx) |
| 439 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 440 | arp_mk_incomplete (ai); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 441 | |
| 442 | return (ADJ_WALK_RC_CONTINUE); |
| 443 | } |
| 444 | |
| 445 | void |
| 446 | arp_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai) |
| 447 | { |
| 448 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 449 | ethernet_arp_interface_t *arp_int; |
| 450 | ethernet_arp_ip4_entry_t *e; |
| 451 | ip_adjacency_t *adj; |
| 452 | |
| 453 | adj = adj_get (ai); |
| 454 | |
| 455 | vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index); |
| 456 | arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
| 457 | e = arp_entry_find (arp_int, &adj->sub_type.nbr.next_hop.ip4); |
| 458 | |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 459 | switch (adj->lookup_next_index) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 460 | { |
Ole Trøan | 438f630 | 2018-02-15 21:56:06 +0000 | [diff] [blame] | 461 | case IP_LOOKUP_NEXT_GLEAN: |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 462 | adj_glean_update_rewrite (ai); |
| 463 | break; |
| 464 | case IP_LOOKUP_NEXT_ARP: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 465 | if (NULL != e) |
| 466 | { |
| 467 | adj_nbr_walk_nh4 (sw_if_index, |
| 468 | &e->ip4_address, arp_mk_complete_walk, e); |
| 469 | } |
| 470 | else |
| 471 | { |
| 472 | /* |
| 473 | * no matching ARP entry. |
| 474 | * construct the rewrite required to for an ARP packet, and stick |
| 475 | * that in the adj's pipe to smoke. |
| 476 | */ |
| 477 | adj_nbr_update_rewrite |
| 478 | (ai, |
| 479 | ADJ_NBR_REWRITE_FLAG_INCOMPLETE, |
| 480 | ethernet_build_rewrite |
| 481 | (vnm, |
| 482 | sw_if_index, |
| 483 | VNET_LINK_ARP, |
| 484 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 485 | |
| 486 | /* |
| 487 | * since the FIB has added this adj for a route, it makes sense it |
| 488 | * may want to forward traffic sometime soon. Let's send a |
| 489 | * speculative ARP. just one. If we were to do periodically that |
| 490 | * wouldn't be bad either, but that's more code than i'm prepared to |
| 491 | * write at this time for relatively little reward. |
| 492 | */ |
| 493 | arp_nbr_probe (adj); |
| 494 | } |
| 495 | break; |
Neale Ranns | 1855b8e | 2018-07-11 10:31:26 -0700 | [diff] [blame] | 496 | case IP_LOOKUP_NEXT_BCAST: |
| 497 | adj_nbr_update_rewrite (ai, |
| 498 | ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 499 | ethernet_build_rewrite |
| 500 | (vnm, |
| 501 | sw_if_index, |
| 502 | VNET_LINK_IP4, |
| 503 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 504 | break; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 505 | case IP_LOOKUP_NEXT_MCAST: |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 506 | { |
| 507 | /* |
| 508 | * Construct a partial rewrite from the known ethernet mcast dest MAC |
| 509 | */ |
| 510 | u8 *rewrite; |
| 511 | u8 offset; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 512 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 513 | rewrite = ethernet_build_rewrite (vnm, |
| 514 | sw_if_index, |
| 515 | adj->ia_link, |
| 516 | ethernet_ip4_mcast_dst_addr ()); |
| 517 | offset = vec_len (rewrite) - 2; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 518 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 519 | /* |
| 520 | * Complete the remaining fields of the adj's rewrite to direct the |
| 521 | * complete of the rewrite at switch time by copying in the IP |
| 522 | * dst address's bytes. |
Neale Ranns | 889fe94 | 2017-06-01 05:43:19 -0400 | [diff] [blame] | 523 | * Ofset is 2 bytes into the MAC desintation address. |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 524 | */ |
Neale Ranns | 889fe94 | 2017-06-01 05:43:19 -0400 | [diff] [blame] | 525 | adj_mcast_update_rewrite (ai, rewrite, offset); |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 526 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 527 | break; |
| 528 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 529 | case IP_LOOKUP_NEXT_DROP: |
| 530 | case IP_LOOKUP_NEXT_PUNT: |
| 531 | case IP_LOOKUP_NEXT_LOCAL: |
| 532 | case IP_LOOKUP_NEXT_REWRITE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 533 | case IP_LOOKUP_NEXT_MCAST_MIDCHAIN: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 534 | case IP_LOOKUP_NEXT_MIDCHAIN: |
| 535 | case IP_LOOKUP_NEXT_ICMP_ERROR: |
| 536 | case IP_LOOKUP_N_NEXT: |
| 537 | ASSERT (0); |
| 538 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 539 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 540 | } |
| 541 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 542 | static void |
Neale Ranns | 6b3a8ef | 2017-09-11 10:34:33 -0700 | [diff] [blame] | 543 | arp_adj_fib_add (ethernet_arp_ip4_entry_t * e, u32 fib_index) |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 544 | { |
| 545 | fib_prefix_t pfx = { |
| 546 | .fp_len = 32, |
| 547 | .fp_proto = FIB_PROTOCOL_IP4, |
| 548 | .fp_addr.ip4 = e->ip4_address, |
| 549 | }; |
| 550 | |
| 551 | e->fib_entry_index = |
| 552 | fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ, |
| 553 | FIB_ENTRY_FLAG_ATTACHED, |
| 554 | DPO_PROTO_IP4, &pfx.fp_addr, |
| 555 | e->sw_if_index, ~0, 1, NULL, |
| 556 | FIB_ROUTE_PATH_FLAG_NONE); |
| 557 | fib_table_lock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ); |
| 558 | } |
| 559 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 560 | static void |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 561 | arp_adj_fib_remove (ethernet_arp_ip4_entry_t * e, u32 fib_index) |
| 562 | { |
| 563 | if (FIB_NODE_INDEX_INVALID != e->fib_entry_index) |
| 564 | { |
| 565 | fib_prefix_t pfx = { |
| 566 | .fp_len = 32, |
| 567 | .fp_proto = FIB_PROTOCOL_IP4, |
| 568 | .fp_addr.ip4 = e->ip4_address, |
| 569 | }; |
| 570 | u32 fib_index; |
| 571 | |
| 572 | fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index); |
| 573 | |
| 574 | fib_table_entry_path_remove (fib_index, &pfx, |
| 575 | FIB_SOURCE_ADJ, |
| 576 | DPO_PROTO_IP4, |
| 577 | &pfx.fp_addr, |
| 578 | e->sw_if_index, ~0, 1, |
| 579 | FIB_ROUTE_PATH_FLAG_NONE); |
| 580 | fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | static ethernet_arp_ip4_entry_t * |
| 585 | force_reuse_arp_entry (void) |
| 586 | { |
| 587 | ethernet_arp_ip4_entry_t *e; |
| 588 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 589 | u32 count = 0; |
| 590 | u32 index = pool_next_index (am->ip4_entry_pool, am->arp_delete_rotor); |
| 591 | if (index == ~0) /* Try again from elt 0 */ |
| 592 | index = pool_next_index (am->ip4_entry_pool, index); |
| 593 | |
| 594 | /* Find a non-static random entry to free up for reuse */ |
| 595 | do |
| 596 | { |
| 597 | if ((count++ == 100) || (index == ~0)) |
| 598 | return NULL; /* give up after 100 entries */ |
| 599 | e = pool_elt_at_index (am->ip4_entry_pool, index); |
| 600 | am->arp_delete_rotor = index; |
| 601 | index = pool_next_index (am->ip4_entry_pool, index); |
| 602 | } |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 603 | while (e->flags & IP_NEIGHBOR_FLAG_STATIC); |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 604 | |
| 605 | /* Remove ARP entry from its interface and update fib */ |
| 606 | hash_unset |
| 607 | (am->ethernet_arp_by_sw_if_index[e->sw_if_index].arp_entries, |
| 608 | e->ip4_address.as_u32); |
| 609 | arp_adj_fib_remove |
| 610 | (e, ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index)); |
| 611 | adj_nbr_walk_nh4 (e->sw_if_index, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 612 | &e->ip4_address, arp_mk_incomplete_walk, e); |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 613 | return e; |
| 614 | } |
| 615 | |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 616 | static int |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 617 | vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 618 | vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 619 | * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 620 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 621 | ethernet_arp_ip4_entry_t *e = 0; |
| 622 | ethernet_arp_main_t *am = ðernet_arp_main; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 623 | vlib_main_t *vm = vlib_get_main (); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 624 | int make_new_arp_cache_entry = 1; |
| 625 | uword *p; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 626 | pending_resolution_t *pr, *mc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 627 | ethernet_arp_interface_t *arp_int; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 628 | u32 sw_if_index = args->sw_if_index; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 629 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 630 | vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 631 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 632 | arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 633 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 634 | if (NULL != arp_int->arp_entries) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 635 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 636 | p = hash_get (arp_int->arp_entries, args->ip4.as_u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 637 | if (p) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 638 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 639 | e = pool_elt_at_index (am->ip4_entry_pool, p[0]); |
| 640 | |
| 641 | /* Refuse to over-write static arp. */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 642 | if (!(args->nbr_flags & IP_NEIGHBOR_FLAG_STATIC) && |
| 643 | (e->flags & IP_NEIGHBOR_FLAG_STATIC)) |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 644 | { |
| 645 | /* if MAC address match, still check to send event */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 646 | if (mac_address_equal (&e->mac, &args->mac)) |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 647 | goto check_customers; |
| 648 | return -2; |
| 649 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 650 | make_new_arp_cache_entry = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 651 | } |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 652 | } |
| 653 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 654 | if (make_new_arp_cache_entry) |
| 655 | { |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 656 | if (am->limit_arp_cache_size && |
| 657 | pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size) |
| 658 | { |
| 659 | e = force_reuse_arp_entry (); |
| 660 | if (NULL == e) |
| 661 | return -2; |
| 662 | } |
| 663 | else |
| 664 | pool_get (am->ip4_entry_pool, e); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 665 | |
| 666 | if (NULL == arp_int->arp_entries) |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 667 | arp_int->arp_entries = hash_create (0, sizeof (u32)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 668 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 669 | hash_set (arp_int->arp_entries, args->ip4.as_u32, |
| 670 | e - am->ip4_entry_pool); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 671 | |
| 672 | e->sw_if_index = sw_if_index; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 673 | e->ip4_address = args->ip4; |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 674 | e->fib_entry_index = FIB_NODE_INDEX_INVALID; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 675 | mac_address_copy (&e->mac, &args->mac); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 676 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 677 | if (!(args->nbr_flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY)) |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 678 | { |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 679 | arp_adj_fib_add (e, |
| 680 | ip4_fib_table_get_index_for_sw_if_index |
| 681 | (e->sw_if_index)); |
Neale Ranns | 2a3ea49 | 2017-04-19 05:24:40 -0700 | [diff] [blame] | 682 | } |
| 683 | else |
| 684 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 685 | e->flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 686 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 687 | } |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 688 | else |
| 689 | { |
| 690 | /* |
| 691 | * prevent a DoS attack from the data-plane that |
| 692 | * spams us with no-op updates to the MAC address |
| 693 | */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 694 | if (mac_address_equal (&e->mac, &args->mac)) |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 695 | { |
| 696 | e->time_last_updated = vlib_time_now (vm); |
| 697 | goto check_customers; |
| 698 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 699 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 700 | /* Update ethernet address. */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 701 | mac_address_copy (&e->mac, &args->mac); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 702 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 703 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 704 | /* Update time stamp and flags. */ |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 705 | e->time_last_updated = vlib_time_now (vm); |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 706 | if (args->nbr_flags & IP_NEIGHBOR_FLAG_STATIC) |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 707 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 708 | e->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC; |
| 709 | e->flags |= IP_NEIGHBOR_FLAG_STATIC; |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 710 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 711 | else |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 712 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 713 | e->flags &= ~IP_NEIGHBOR_FLAG_STATIC; |
| 714 | e->flags |= IP_NEIGHBOR_FLAG_DYNAMIC; |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 715 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 716 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 717 | adj_nbr_walk_nh4 (sw_if_index, &e->ip4_address, arp_mk_complete_walk, e); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 718 | |
Dave Barach | 59b2565 | 2017-09-10 15:04:27 -0400 | [diff] [blame] | 719 | check_customers: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 720 | /* Customer(s) waiting for this address to be resolved? */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 721 | p = hash_get (am->pending_resolutions_by_address, args->ip4.as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 722 | if (p) |
| 723 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 724 | u32 next_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 725 | next_index = p[0]; |
| 726 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 727 | while (next_index != (u32) ~ 0) |
| 728 | { |
| 729 | pr = pool_elt_at_index (am->pending_resolutions, next_index); |
| 730 | vlib_process_signal_event (vm, pr->node_index, |
| 731 | pr->type_opaque, pr->data); |
| 732 | next_index = pr->next_index; |
| 733 | pool_put (am->pending_resolutions, pr); |
| 734 | } |
| 735 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 736 | hash_unset (am->pending_resolutions_by_address, args->ip4.as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 737 | } |
| 738 | |
| 739 | /* Customer(s) requesting ARP event for this address? */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 740 | p = hash_get (am->mac_changes_by_address, args->ip4.as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 741 | if (p) |
| 742 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 743 | u32 next_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 744 | next_index = p[0]; |
| 745 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 746 | while (next_index != (u32) ~ 0) |
| 747 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 748 | int rv = 1; |
| 749 | mc = pool_elt_at_index (am->mac_changes, next_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 750 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 751 | /* Call the user's data callback, return 1 to suppress dup events */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 752 | if (mc->data_callback) |
| 753 | rv = (mc->data_callback) (mc->data, &args->mac, sw_if_index, 0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 754 | |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 755 | /* |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 756 | * Signal the resolver process, as long as the user |
| 757 | * says they want to be notified |
| 758 | */ |
| 759 | if (rv == 0) |
| 760 | vlib_process_signal_event (vm, mc->node_index, |
| 761 | mc->type_opaque, mc->data); |
| 762 | next_index = mc->next_index; |
| 763 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | return 0; |
| 767 | } |
| 768 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 769 | void |
| 770 | vnet_register_ip4_arp_resolution_event (vnet_main_t * vnm, |
| 771 | void *address_arg, |
| 772 | uword node_index, |
| 773 | uword type_opaque, uword data) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 774 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 775 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 776 | ip4_address_t *address = address_arg; |
| 777 | uword *p; |
| 778 | pending_resolution_t *pr; |
| 779 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 780 | pool_get (am->pending_resolutions, pr); |
| 781 | |
| 782 | pr->next_index = ~0; |
| 783 | pr->node_index = node_index; |
| 784 | pr->type_opaque = type_opaque; |
| 785 | pr->data = data; |
| 786 | pr->data_callback = 0; |
| 787 | |
| 788 | p = hash_get (am->pending_resolutions_by_address, address->as_u32); |
| 789 | if (p) |
| 790 | { |
| 791 | /* Insert new resolution at the head of the list */ |
| 792 | pr->next_index = p[0]; |
| 793 | hash_unset (am->pending_resolutions_by_address, address->as_u32); |
| 794 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 795 | |
| 796 | hash_set (am->pending_resolutions_by_address, address->as_u32, |
| 797 | pr - am->pending_resolutions); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 798 | } |
| 799 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 800 | int |
| 801 | vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 802 | arp_change_event_cb_t data_callback, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 803 | u32 pid, |
| 804 | void *address_arg, |
| 805 | uword node_index, |
| 806 | uword type_opaque, uword data, int is_add) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 807 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 808 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 809 | ip4_address_t *address = address_arg; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 810 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 811 | /* Try to find an existing entry */ |
| 812 | u32 *first = (u32 *) hash_get (am->mac_changes_by_address, address->as_u32); |
| 813 | u32 *p = first; |
| 814 | pending_resolution_t *mc; |
| 815 | while (p && *p != ~0) |
| 816 | { |
| 817 | mc = pool_elt_at_index (am->mac_changes, *p); |
| 818 | if (mc->node_index == node_index && mc->type_opaque == type_opaque |
| 819 | && mc->pid == pid) |
| 820 | break; |
| 821 | p = &mc->next_index; |
| 822 | } |
| 823 | |
| 824 | int found = p && *p != ~0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 825 | if (is_add) |
| 826 | { |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 827 | if (found) |
| 828 | return VNET_API_ERROR_ENTRY_ALREADY_EXISTS; |
| 829 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 830 | pool_get (am->mac_changes, mc); |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 831 | /* *INDENT-OFF* */ |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 832 | *mc = (pending_resolution_t) |
| 833 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 834 | .next_index = ~0, |
| 835 | .node_index = node_index, |
| 836 | .type_opaque = type_opaque, |
| 837 | .data = data, |
| 838 | .data_callback = data_callback, |
| 839 | .pid = pid, |
| 840 | }; |
| 841 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 842 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 843 | /* Insert new resolution at the end of the list */ |
| 844 | u32 new_idx = mc - am->mac_changes; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 845 | if (p) |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 846 | p[0] = new_idx; |
| 847 | else |
| 848 | hash_set (am->mac_changes_by_address, address->as_u32, new_idx); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 849 | } |
| 850 | else |
| 851 | { |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 852 | if (!found) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 853 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 854 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 855 | /* Clients may need to clean up pool entries, too */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 856 | if (data_callback) |
| 857 | /* no new mac addrs */ |
| 858 | (data_callback) (mc->data, NULL, ~0, NULL); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 859 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 860 | /* Remove the entry from the list and delete the entry */ |
| 861 | *p = mc->next_index; |
| 862 | pool_put (am->mac_changes, mc); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 863 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 864 | /* Remove from hash if we deleted the last entry */ |
| 865 | if (*p == ~0 && p == first) |
| 866 | hash_unset (am->mac_changes_by_address, address->as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 867 | } |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 868 | return 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | /* Either we drop the packet or we send a reply to the sender. */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 872 | typedef enum |
| 873 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 874 | ARP_INPUT_NEXT_DROP, |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 875 | ARP_INPUT_NEXT_REPLY_TX, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 876 | ARP_INPUT_N_NEXT, |
| 877 | } arp_input_next_t; |
| 878 | |
| 879 | #define foreach_ethernet_arp_error \ |
| 880 | _ (replies_sent, "ARP replies sent") \ |
| 881 | _ (l2_type_not_ethernet, "L2 type not ethernet") \ |
| 882 | _ (l3_type_not_ip4, "L3 type not IP4") \ |
| 883 | _ (l3_src_address_not_local, "IP4 source address not local to subnet") \ |
| 884 | _ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \ |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 885 | _ (l3_dst_address_unset, "IP4 destination address is unset") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 886 | _ (l3_src_address_is_local, "IP4 source address matches local interface") \ |
| 887 | _ (l3_src_address_learned, "ARP request IP4 source address learned") \ |
| 888 | _ (replies_received, "ARP replies received") \ |
| 889 | _ (opcode_not_request, "ARP opcode not request") \ |
| 890 | _ (proxy_arp_replies_sent, "Proxy ARP replies sent") \ |
| 891 | _ (l2_address_mismatch, "ARP hw addr does not match L2 frame src addr") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 892 | _ (gratuitous_arp, "ARP probe or announcement dropped") \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 893 | _ (interface_no_table, "Interface is not mapped to an IP table") \ |
Neale Ranns | d96bad8 | 2017-03-08 01:12:54 -0800 | [diff] [blame] | 894 | _ (interface_not_ip_enabled, "Interface is not IP enabled") \ |
Neale Ranns | 7425f92 | 2019-01-23 00:36:16 -0800 | [diff] [blame] | 895 | _ (unnumbered_mismatch, "RX interface is unnumbered to different subnet") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 896 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 897 | typedef enum |
| 898 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 899 | #define _(sym,string) ETHERNET_ARP_ERROR_##sym, |
| 900 | foreach_ethernet_arp_error |
| 901 | #undef _ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 902 | ETHERNET_ARP_N_ERROR, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 903 | } ethernet_arp_input_error_t; |
| 904 | |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 905 | static int |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 906 | arp_unnumbered (vlib_buffer_t * p0, |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 907 | u32 input_sw_if_index, u32 conn_sw_if_index) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 908 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 909 | vnet_main_t *vnm = vnet_get_main (); |
| 910 | vnet_interface_main_t *vim = &vnm->interface_main; |
| 911 | vnet_sw_interface_t *si; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 912 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 913 | /* verify that the input interface is unnumbered to the connected. |
| 914 | * the connected interface is the interface on which the subnet is |
| 915 | * configured */ |
| 916 | si = &vim->sw_interfaces[input_sw_if_index]; |
| 917 | |
| 918 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED && |
| 919 | (si->unnumbered_sw_if_index == conn_sw_if_index))) |
| 920 | { |
| 921 | /* the input interface is not unnumbered to the interface on which |
| 922 | * the sub-net is configured that covers the ARP request. |
| 923 | * So this is not the case for unnumbered.. */ |
| 924 | return 0; |
| 925 | } |
| 926 | |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 927 | return !0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 930 | static u32 |
| 931 | arp_learn (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 932 | ethernet_arp_main_t * am, u32 sw_if_index, |
| 933 | const ethernet_arp_ip4_over_ethernet_address_t * addr) |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 934 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 935 | vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, addr, 0); |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 936 | return (ETHERNET_ARP_ERROR_l3_src_address_learned); |
| 937 | } |
| 938 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 939 | static uword |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 940 | arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 941 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 942 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 943 | vnet_main_t *vnm = vnet_get_main (); |
| 944 | ip4_main_t *im4 = &ip4_main; |
| 945 | u32 n_left_from, next_index, *from, *to_next; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 946 | u32 n_replies_sent = 0, n_proxy_arp_replies_sent = 0; |
| 947 | |
| 948 | from = vlib_frame_vector_args (frame); |
| 949 | n_left_from = frame->n_vectors; |
| 950 | next_index = node->cached_next_index; |
| 951 | |
| 952 | if (node->flags & VLIB_NODE_FLAG_TRACE) |
| 953 | vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, |
| 954 | /* stride */ 1, |
| 955 | sizeof (ethernet_arp_input_trace_t)); |
| 956 | |
| 957 | while (n_left_from > 0) |
| 958 | { |
| 959 | u32 n_left_to_next; |
| 960 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 961 | vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 962 | |
| 963 | while (n_left_from > 0 && n_left_to_next > 0) |
| 964 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 965 | vlib_buffer_t *p0; |
| 966 | vnet_hw_interface_t *hw_if0; |
| 967 | ethernet_arp_header_t *arp0; |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 968 | ethernet_header_t *eth_rx, *eth_tx; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 969 | const ip4_address_t *if_addr0; |
| 970 | ip4_address_t proxy_src; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 971 | u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0; |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 972 | u8 is_request0, dst_is_local0, is_unnum0, is_vrrp_reply0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 973 | ethernet_proxy_arp_t *pa; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 974 | fib_node_index_t dst_fei, src_fei; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 975 | const fib_prefix_t *pfx0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 976 | fib_entry_flag_t src_flags, dst_flags; |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 977 | u8 *rewrite0, rewrite0_len; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 978 | |
| 979 | pi0 = from[0]; |
| 980 | to_next[0] = pi0; |
| 981 | from += 1; |
| 982 | to_next += 1; |
| 983 | n_left_from -= 1; |
| 984 | n_left_to_next -= 1; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 985 | pa = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 986 | |
| 987 | p0 = vlib_get_buffer (vm, pi0); |
| 988 | arp0 = vlib_buffer_get_current (p0); |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 989 | /* Fill in ethernet header. */ |
| 990 | eth_rx = ethernet_buffer_get_header (p0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 991 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 992 | is_request0 = arp0->opcode |
| 993 | == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 994 | |
| 995 | error0 = ETHERNET_ARP_ERROR_replies_sent; |
| 996 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 997 | error0 = |
| 998 | (arp0->l2_type != |
| 999 | clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) ? |
| 1000 | ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0); |
| 1001 | error0 = |
| 1002 | (arp0->l3_type != |
| 1003 | clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ? |
| 1004 | ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0); |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1005 | error0 = |
| 1006 | (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ? |
| 1007 | ETHERNET_ARP_ERROR_l3_dst_address_unset : error0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1008 | |
| 1009 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 1010 | |
Neale Ranns | d96bad8 | 2017-03-08 01:12:54 -0800 | [diff] [blame] | 1011 | /* not playing the ARP game if the interface is not IPv4 enabled */ |
| 1012 | error0 = |
| 1013 | (im4->ip_enabled_by_sw_if_index[sw_if_index0] == 0 ? |
| 1014 | ETHERNET_ARP_ERROR_interface_not_ip_enabled : error0); |
| 1015 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1016 | if (error0) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1017 | goto drop2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1018 | |
| 1019 | /* Check that IP address is local and matches incoming interface. */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1020 | fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); |
| 1021 | if (~0 == fib_index0) |
| 1022 | { |
| 1023 | error0 = ETHERNET_ARP_ERROR_interface_no_table; |
| 1024 | goto drop2; |
| 1025 | |
| 1026 | } |
| 1027 | dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), |
| 1028 | &arp0->ip4_over_ethernet[1].ip4, |
| 1029 | 32); |
Matus Fabian | dccbee3 | 2017-01-31 22:20:30 -0800 | [diff] [blame] | 1030 | dst_flags = fib_entry_get_flags (dst_fei); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1031 | |
Matus Fabian | dccbee3 | 2017-01-31 22:20:30 -0800 | [diff] [blame] | 1032 | conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1033 | |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1034 | /* Honor unnumbered interface, if any */ |
| 1035 | is_unnum0 = sw_if_index0 != conn_sw_if_index0; |
| 1036 | |
| 1037 | { |
| 1038 | /* |
| 1039 | * we're looking for FIB entries that indicate the source |
| 1040 | * is attached. There may be more specific non-attached |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1041 | * routes that match the source, but these do not influence |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1042 | * whether we respond to an ARP request, i.e. they do not |
| 1043 | * influence whether we are the correct way for the sender |
| 1044 | * to reach us, they only affect how we reach the sender. |
| 1045 | */ |
| 1046 | fib_entry_t *src_fib_entry; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1047 | const fib_prefix_t *pfx; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1048 | fib_entry_src_t *src; |
| 1049 | fib_source_t source; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1050 | int attached; |
| 1051 | int mask; |
| 1052 | |
| 1053 | mask = 32; |
| 1054 | attached = 0; |
| 1055 | |
| 1056 | do |
| 1057 | { |
| 1058 | src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), |
| 1059 | &arp0-> |
| 1060 | ip4_over_ethernet[0].ip4, |
| 1061 | mask); |
| 1062 | src_fib_entry = fib_entry_get (src_fei); |
| 1063 | |
| 1064 | /* |
| 1065 | * It's possible that the source that provides the |
| 1066 | * flags we need, or the flags we must not have, |
| 1067 | * is not the best source, so check then all. |
| 1068 | */ |
| 1069 | /* *INDENT-OFF* */ |
| 1070 | FOR_EACH_SRC_ADDED(src_fib_entry, src, source, |
| 1071 | ({ |
| 1072 | src_flags = fib_entry_get_flags_for_source (src_fei, source); |
| 1073 | |
| 1074 | /* Reject requests/replies with our local interface |
| 1075 | address. */ |
| 1076 | if (FIB_ENTRY_FLAG_LOCAL & src_flags) |
| 1077 | { |
| 1078 | error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local; |
Neale Ranns | 24b170a | 2017-08-15 05:33:11 -0700 | [diff] [blame] | 1079 | /* |
| 1080 | * When VPP has an interface whose address is also |
| 1081 | * applied to a TAP interface on the host, then VPP's |
| 1082 | * TAP interface will be unnumbered to the 'real' |
| 1083 | * interface and do proxy ARP from the host. |
| 1084 | * The curious aspect of this setup is that ARP requests |
| 1085 | * from the host will come from the VPP's own address. |
| 1086 | * So don't drop immediately here, instead go see if this |
| 1087 | * is a proxy ARP case. |
| 1088 | */ |
| 1089 | goto drop1; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1090 | } |
| 1091 | /* A Source must also be local to subnet of matching |
| 1092 | * interface address. */ |
| 1093 | if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) || |
| 1094 | (FIB_ENTRY_FLAG_CONNECTED & src_flags)) |
| 1095 | { |
| 1096 | attached = 1; |
| 1097 | break; |
| 1098 | } |
| 1099 | /* |
| 1100 | * else |
| 1101 | * The packet was sent from an address that is not |
| 1102 | * connected nor attached i.e. it is not from an |
| 1103 | * address that is covered by a link's sub-net, |
| 1104 | * nor is it a already learned host resp. |
| 1105 | */ |
| 1106 | })); |
| 1107 | /* *INDENT-ON* */ |
| 1108 | |
| 1109 | /* |
| 1110 | * shorter mask lookup for the next iteration. |
| 1111 | */ |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1112 | pfx = fib_entry_get_prefix (src_fei); |
| 1113 | mask = pfx->fp_len - 1; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1114 | |
| 1115 | /* |
| 1116 | * continue until we hit the default route or we find |
| 1117 | * the attached we are looking for. The most likely |
| 1118 | * outcome is we find the attached with the first source |
| 1119 | * on the first lookup. |
| 1120 | */ |
| 1121 | } |
| 1122 | while (!attached && |
| 1123 | !fib_entry_is_sourced (src_fei, FIB_SOURCE_DEFAULT_ROUTE)); |
| 1124 | |
| 1125 | if (!attached) |
| 1126 | { |
| 1127 | /* |
| 1128 | * the matching route is a not attached, i.e. it was |
| 1129 | * added as a result of routing, rather than interface/ARP |
| 1130 | * configuration. If the matching route is not a host route |
| 1131 | * (i.e. a /32) |
| 1132 | */ |
| 1133 | error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local; |
| 1134 | goto drop2; |
| 1135 | } |
| 1136 | } |
| 1137 | |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1138 | if (fib_entry_is_sourced (dst_fei, FIB_SOURCE_ADJ)) |
| 1139 | { |
| 1140 | /* |
| 1141 | * We matched an adj-fib on ths source subnet (a /32 previously |
| 1142 | * added as a result of ARP). If this request is a gratuitous |
| 1143 | * ARP, then learn from it. |
| 1144 | * The check for matching an adj-fib, is to prevent hosts |
| 1145 | * from spamming us with gratuitous ARPS that might otherwise |
| 1146 | * blow our ARP cache |
| 1147 | */ |
| 1148 | if (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 1149 | arp0->ip4_over_ethernet[1].ip4.as_u32) |
| 1150 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1151 | &arp0->ip4_over_ethernet[0]); |
| 1152 | goto drop2; |
| 1153 | } |
| 1154 | else if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1155 | { |
| 1156 | error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local; |
| 1157 | goto drop1; |
| 1158 | } |
| 1159 | |
Neale Ranns | 797235a | 2017-01-09 14:33:38 +0100 | [diff] [blame] | 1160 | if (sw_if_index0 != fib_entry_get_resolving_interface (src_fei)) |
| 1161 | { |
| 1162 | /* |
| 1163 | * The interface the ARP was received on is not the interface |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1164 | * on which the covering prefix is configured. Maybe this is a |
| 1165 | * case for unnumbered. |
Neale Ranns | 797235a | 2017-01-09 14:33:38 +0100 | [diff] [blame] | 1166 | */ |
| 1167 | is_unnum0 = 1; |
| 1168 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1169 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1170 | dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags); |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1171 | pfx0 = fib_entry_get_prefix (dst_fei); |
| 1172 | if_addr0 = &pfx0->fp_addr.ip4; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1173 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 1174 | is_vrrp_reply0 = |
| 1175 | ((arp0->opcode == |
| 1176 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) |
| 1177 | && |
| 1178 | (!memcmp |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1179 | (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix, |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 1180 | sizeof (vrrp_prefix)))); |
| 1181 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1182 | /* Trash ARP packets whose ARP-level source addresses do not |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 1183 | match their L2-frame-level source addresses, unless it's |
| 1184 | a reply from a VRRP virtual router */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1185 | if (!ethernet_mac_address_equal |
| 1186 | (eth_rx->src_address, |
| 1187 | arp0->ip4_over_ethernet[0].mac.bytes) && !is_vrrp_reply0) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1188 | { |
| 1189 | error0 = ETHERNET_ARP_ERROR_l2_address_mismatch; |
| 1190 | goto drop2; |
| 1191 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1192 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 1193 | /* Learn or update sender's mapping only for replies to addresses |
| 1194 | * that are local to the subnet */ |
| 1195 | if (arp0->opcode == |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1196 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1197 | { |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1198 | if (dst_is_local0) |
| 1199 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1200 | &arp0->ip4_over_ethernet[0]); |
| 1201 | else |
| 1202 | /* a reply for a non-local destination could be a GARP. |
| 1203 | * GARPs for hosts we know were handled above, so this one |
| 1204 | * we drop */ |
| 1205 | error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local; |
| 1206 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1207 | goto drop1; |
| 1208 | } |
zhaoqingling | b4c42cd | 2017-12-23 15:20:59 +0800 | [diff] [blame] | 1209 | else if (arp0->opcode == |
| 1210 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) && |
| 1211 | (dst_is_local0 == 0)) |
| 1212 | { |
| 1213 | goto drop1; |
| 1214 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1215 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1216 | send_reply: |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1217 | /* Send a reply. |
| 1218 | An adjacency to the sender is not always present, |
| 1219 | so we use the interface to build us a rewrite string |
| 1220 | which will contain all the necessary tags. */ |
| 1221 | rewrite0 = ethernet_build_rewrite (vnm, sw_if_index0, |
| 1222 | VNET_LINK_ARP, |
| 1223 | eth_rx->src_address); |
| 1224 | rewrite0_len = vec_len (rewrite0); |
| 1225 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1226 | /* Figure out how much to rewind current data from adjacency. */ |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1227 | vlib_buffer_advance (p0, -rewrite0_len); |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1228 | eth_tx = vlib_buffer_get_current (p0); |
| 1229 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1230 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 1231 | hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); |
| 1232 | |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 1233 | /* Send reply back through input interface */ |
| 1234 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 1235 | next0 = ARP_INPUT_NEXT_REPLY_TX; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1236 | |
| 1237 | arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply); |
| 1238 | |
| 1239 | arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0]; |
| 1240 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1241 | mac_address_from_bytes (&arp0->ip4_over_ethernet[0].mac, |
| 1242 | hw_if0->hw_address); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1243 | clib_mem_unaligned (&arp0->ip4_over_ethernet[0].ip4.data_u32, u32) = |
| 1244 | if_addr0->data_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1245 | |
| 1246 | /* Hardware must be ethernet-like. */ |
| 1247 | ASSERT (vec_len (hw_if0->hw_address) == 6); |
| 1248 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1249 | /* the rx nd tx ethernet headers wil overlap in the case |
| 1250 | * when we received a tagged VLAN=0 packet, but we are sending |
| 1251 | * back untagged */ |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1252 | clib_memcpy_fast (eth_tx, rewrite0, vec_len (rewrite0)); |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1253 | vec_free (rewrite0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1254 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1255 | if (NULL == pa) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1256 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1257 | if (is_unnum0) |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 1258 | { |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1259 | if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0)) |
Neale Ranns | 7425f92 | 2019-01-23 00:36:16 -0800 | [diff] [blame] | 1260 | { |
| 1261 | error0 = ETHERNET_ARP_ERROR_unnumbered_mismatch; |
| 1262 | goto drop2; |
| 1263 | } |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 1264 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1265 | } |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 1266 | |
Neale Ranns | 24b170a | 2017-08-15 05:33:11 -0700 | [diff] [blame] | 1267 | /* We are going to reply to this request, so, in the absence of |
| 1268 | errors, learn the sender */ |
| 1269 | if (!error0) |
| 1270 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1271 | &arp0->ip4_over_ethernet[1]); |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 1272 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1273 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, |
| 1274 | n_left_to_next, pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1275 | |
| 1276 | n_replies_sent += 1; |
| 1277 | continue; |
| 1278 | |
| 1279 | drop1: |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1280 | if (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 1281 | arp0->ip4_over_ethernet[1].ip4.as_u32) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1282 | { |
| 1283 | error0 = ETHERNET_ARP_ERROR_gratuitous_arp; |
| 1284 | goto drop2; |
| 1285 | } |
| 1286 | /* See if proxy arp is configured for the address */ |
| 1287 | if (is_request0) |
| 1288 | { |
| 1289 | vnet_sw_interface_t *si; |
| 1290 | u32 this_addr = clib_net_to_host_u32 |
| 1291 | (arp0->ip4_over_ethernet[1].ip4.as_u32); |
| 1292 | u32 fib_index0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1293 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1294 | si = vnet_get_sw_interface (vnm, sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1295 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1296 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_PROXY_ARP)) |
| 1297 | goto drop2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1298 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1299 | fib_index0 = vec_elt (im4->fib_index_by_sw_if_index, |
| 1300 | sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1301 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1302 | vec_foreach (pa, am->proxy_arps) |
| 1303 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 1304 | u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr.as_u32); |
| 1305 | u32 hi_addr = clib_net_to_host_u32 (pa->hi_addr.as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1306 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1307 | /* an ARP request hit in the proxy-arp table? */ |
| 1308 | if ((this_addr >= lo_addr && this_addr <= hi_addr) && |
| 1309 | (fib_index0 == pa->fib_index)) |
| 1310 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1311 | proxy_src.as_u32 = |
| 1312 | arp0->ip4_over_ethernet[1].ip4.data_u32; |
| 1313 | |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 1314 | /* |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1315 | * change the interface address to the proxied |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1316 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1317 | if_addr0 = &proxy_src; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1318 | is_unnum0 = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1319 | n_proxy_arp_replies_sent++; |
| 1320 | goto send_reply; |
| 1321 | } |
| 1322 | } |
| 1323 | } |
| 1324 | |
| 1325 | drop2: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1326 | |
| 1327 | next0 = ARP_INPUT_NEXT_DROP; |
| 1328 | p0->error = node->errors[error0]; |
| 1329 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1330 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, |
| 1331 | n_left_to_next, pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1332 | } |
| 1333 | |
| 1334 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 1335 | } |
| 1336 | |
| 1337 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1338 | ETHERNET_ARP_ERROR_replies_sent, |
| 1339 | n_replies_sent - n_proxy_arp_replies_sent); |
| 1340 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1341 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1342 | ETHERNET_ARP_ERROR_proxy_arp_replies_sent, |
| 1343 | n_proxy_arp_replies_sent); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1344 | return frame->n_vectors; |
| 1345 | } |
| 1346 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1347 | static char *ethernet_arp_error_strings[] = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1348 | #define _(sym,string) string, |
| 1349 | foreach_ethernet_arp_error |
| 1350 | #undef _ |
| 1351 | }; |
| 1352 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1353 | /* *INDENT-OFF* */ |
| 1354 | VLIB_REGISTER_NODE (arp_input_node, static) = |
| 1355 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1356 | .function = arp_input, |
| 1357 | .name = "arp-input", |
| 1358 | .vector_size = sizeof (u32), |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1359 | .n_errors = ETHERNET_ARP_N_ERROR, |
| 1360 | .error_strings = ethernet_arp_error_strings, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1361 | .n_next_nodes = ARP_INPUT_N_NEXT, |
| 1362 | .next_nodes = { |
| 1363 | [ARP_INPUT_NEXT_DROP] = "error-drop", |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 1364 | [ARP_INPUT_NEXT_REPLY_TX] = "interface-output", |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1365 | }, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1366 | .format_buffer = format_ethernet_arp_header, |
| 1367 | .format_trace = format_ethernet_arp_input_trace, |
| 1368 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1369 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1370 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1371 | static int |
| 1372 | ip4_arp_entry_sort (void *a1, void *a2) |
| 1373 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1374 | ethernet_arp_ip4_entry_t *e1 = a1; |
| 1375 | ethernet_arp_ip4_entry_t *e2 = a2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1376 | |
| 1377 | int cmp; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1378 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1379 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1380 | cmp = vnet_sw_interface_compare (vnm, e1->sw_if_index, e2->sw_if_index); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1381 | if (!cmp) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1382 | cmp = ip4_address_compare (&e1->ip4_address, &e2->ip4_address); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1383 | return cmp; |
| 1384 | } |
| 1385 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1386 | ethernet_arp_ip4_entry_t * |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 1387 | ip4_neighbors_pool (void) |
| 1388 | { |
| 1389 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1390 | return am->ip4_entry_pool; |
| 1391 | } |
| 1392 | |
| 1393 | ethernet_arp_ip4_entry_t * |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1394 | ip4_neighbor_entries (u32 sw_if_index) |
| 1395 | { |
| 1396 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1397 | ethernet_arp_ip4_entry_t *n, *ns = 0; |
| 1398 | |
| 1399 | /* *INDENT-OFF* */ |
| 1400 | pool_foreach (n, am->ip4_entry_pool, ({ |
| 1401 | if (sw_if_index != ~0 && n->sw_if_index != sw_if_index) |
| 1402 | continue; |
| 1403 | vec_add1 (ns, n[0]); |
| 1404 | })); |
| 1405 | /* *INDENT-ON* */ |
| 1406 | |
| 1407 | if (ns) |
| 1408 | vec_sort_with_function (ns, ip4_arp_entry_sort); |
| 1409 | return ns; |
| 1410 | } |
| 1411 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1412 | static clib_error_t * |
| 1413 | show_ip4_arp (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1414 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1415 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1416 | vnet_main_t *vnm = vnet_get_main (); |
| 1417 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1418 | ethernet_arp_ip4_entry_t *e, *es; |
| 1419 | ethernet_proxy_arp_t *pa; |
| 1420 | clib_error_t *error = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1421 | u32 sw_if_index; |
| 1422 | |
| 1423 | /* Filter entries by interface if given. */ |
| 1424 | sw_if_index = ~0; |
| 1425 | (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index); |
| 1426 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1427 | es = ip4_neighbor_entries (sw_if_index); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1428 | if (es) |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1429 | { |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1430 | vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, 0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1431 | vec_foreach (e, es) |
| 1432 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1433 | vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, e); |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1434 | } |
| 1435 | vec_free (es); |
| 1436 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1437 | |
| 1438 | if (vec_len (am->proxy_arps)) |
| 1439 | { |
| 1440 | vlib_cli_output (vm, "Proxy arps enabled for:"); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1441 | vec_foreach (pa, am->proxy_arps) |
| 1442 | { |
| 1443 | vlib_cli_output (vm, "Fib_index %d %U - %U ", |
| 1444 | pa->fib_index, |
| 1445 | format_ip4_address, &pa->lo_addr, |
| 1446 | format_ip4_address, &pa->hi_addr); |
| 1447 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1448 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1449 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1450 | return error; |
| 1451 | } |
| 1452 | |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 1453 | /*? |
| 1454 | * Display all the IPv4 ARP entries. |
| 1455 | * |
| 1456 | * @cliexpar |
| 1457 | * Example of how to display the IPv4 ARP table: |
| 1458 | * @cliexstart{show ip arp} |
| 1459 | * Time FIB IP4 Flags Ethernet Interface |
| 1460 | * 346.3028 0 6.1.1.3 de:ad:be:ef:ba:be GigabitEthernet2/0/0 |
| 1461 | * 3077.4271 0 6.1.1.4 S de:ad:be:ef:ff:ff GigabitEthernet2/0/0 |
| 1462 | * 2998.6409 1 6.2.2.3 de:ad:be:ef:00:01 GigabitEthernet2/0/0 |
| 1463 | * Proxy arps enabled for: |
| 1464 | * Fib_index 0 6.0.0.1 - 6.0.0.11 |
| 1465 | * @cliexend |
| 1466 | ?*/ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1467 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1468 | VLIB_CLI_COMMAND (show_ip4_arp_command, static) = { |
| 1469 | .path = "show ip arp", |
| 1470 | .function = show_ip4_arp, |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 1471 | .short_help = "show ip arp", |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1472 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1473 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1474 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1475 | typedef struct |
| 1476 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1477 | pg_edit_t l2_type, l3_type; |
| 1478 | pg_edit_t n_l2_address_bytes, n_l3_address_bytes; |
| 1479 | pg_edit_t opcode; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1480 | struct |
| 1481 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1482 | pg_edit_t mac; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1483 | pg_edit_t ip4; |
| 1484 | } ip4_over_ethernet[2]; |
| 1485 | } pg_ethernet_arp_header_t; |
| 1486 | |
| 1487 | static inline void |
| 1488 | pg_ethernet_arp_header_init (pg_ethernet_arp_header_t * p) |
| 1489 | { |
| 1490 | /* Initialize fields that are not bit fields in the IP header. */ |
| 1491 | #define _(f) pg_edit_init (&p->f, ethernet_arp_header_t, f); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1492 | _(l2_type); |
| 1493 | _(l3_type); |
| 1494 | _(n_l2_address_bytes); |
| 1495 | _(n_l3_address_bytes); |
| 1496 | _(opcode); |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1497 | _(ip4_over_ethernet[0].mac); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1498 | _(ip4_over_ethernet[0].ip4); |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1499 | _(ip4_over_ethernet[1].mac); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1500 | _(ip4_over_ethernet[1].ip4); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1501 | #undef _ |
| 1502 | } |
| 1503 | |
| 1504 | uword |
| 1505 | unformat_pg_arp_header (unformat_input_t * input, va_list * args) |
| 1506 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1507 | pg_stream_t *s = va_arg (*args, pg_stream_t *); |
| 1508 | pg_ethernet_arp_header_t *p; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1509 | u32 group_index; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1510 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1511 | p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ethernet_arp_header_t), |
| 1512 | &group_index); |
| 1513 | pg_ethernet_arp_header_init (p); |
| 1514 | |
| 1515 | /* Defaults. */ |
| 1516 | pg_edit_set_fixed (&p->l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet); |
| 1517 | pg_edit_set_fixed (&p->l3_type, ETHERNET_TYPE_IP4); |
| 1518 | pg_edit_set_fixed (&p->n_l2_address_bytes, 6); |
| 1519 | pg_edit_set_fixed (&p->n_l3_address_bytes, 4); |
| 1520 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1521 | if (!unformat (input, "%U: %U/%U -> %U/%U", |
| 1522 | unformat_pg_edit, |
| 1523 | unformat_ethernet_arp_opcode_net_byte_order, &p->opcode, |
| 1524 | unformat_pg_edit, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1525 | unformat_mac_address_t, &p->ip4_over_ethernet[0].mac, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1526 | unformat_pg_edit, |
| 1527 | unformat_ip4_address, &p->ip4_over_ethernet[0].ip4, |
| 1528 | unformat_pg_edit, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1529 | unformat_mac_address_t, &p->ip4_over_ethernet[1].mac, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1530 | unformat_pg_edit, |
| 1531 | unformat_ip4_address, &p->ip4_over_ethernet[1].ip4)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1532 | { |
| 1533 | /* Free up any edits we may have added. */ |
| 1534 | pg_free_edit_group (s); |
| 1535 | return 0; |
| 1536 | } |
| 1537 | return 1; |
| 1538 | } |
| 1539 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1540 | clib_error_t * |
| 1541 | ip4_set_arp_limit (u32 arp_limit) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1542 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1543 | ethernet_arp_main_t *am = ðernet_arp_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1544 | |
| 1545 | am->limit_arp_cache_size = arp_limit; |
| 1546 | return 0; |
| 1547 | } |
| 1548 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1549 | /** |
| 1550 | * @brief Control Plane hook to remove an ARP entry |
| 1551 | */ |
| 1552 | int |
| 1553 | vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1554 | u32 sw_if_index, |
| 1555 | const |
| 1556 | ethernet_arp_ip4_over_ethernet_address_t * |
| 1557 | a) |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1558 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1559 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { |
| 1560 | .sw_if_index = sw_if_index, |
| 1561 | .flags = ETHERNET_ARP_ARGS_REMOVE, |
| 1562 | .ip4 = a->ip4, |
| 1563 | .mac = a->mac, |
| 1564 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1565 | |
| 1566 | vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback, |
| 1567 | (u8 *) & args, sizeof (args)); |
| 1568 | return 0; |
| 1569 | } |
| 1570 | |
| 1571 | /** |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1572 | * @brief publish wildcard arp event |
| 1573 | * @param sw_if_index The interface on which the ARP entires are acted |
| 1574 | */ |
| 1575 | static int |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1576 | vnet_arp_wc_publish (u32 sw_if_index, |
| 1577 | const ethernet_arp_ip4_over_ethernet_address_t * a) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1578 | { |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1579 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { |
| 1580 | .flags = ETHERNET_ARP_ARGS_WC_PUB, |
| 1581 | .sw_if_index = sw_if_index, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1582 | .ip4 = a->ip4, |
| 1583 | .mac = a->mac, |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1584 | }; |
| 1585 | |
| 1586 | vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback, |
| 1587 | (u8 *) & args, sizeof (args)); |
| 1588 | return 0; |
| 1589 | } |
| 1590 | |
| 1591 | static void |
| 1592 | vnet_arp_wc_publish_internal (vnet_main_t * vnm, |
| 1593 | vnet_arp_set_ip4_over_ethernet_rpc_args_t * |
| 1594 | args) |
| 1595 | { |
| 1596 | vlib_main_t *vm = vlib_get_main (); |
| 1597 | ethernet_arp_main_t *am = ðernet_arp_main; |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 1598 | uword ni = am->wc_ip4_arp_publisher_node; |
| 1599 | uword et = am->wc_ip4_arp_publisher_et; |
| 1600 | |
| 1601 | if (ni == (uword) ~ 0) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1602 | return; |
| 1603 | wc_arp_report_t *r = |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 1604 | vlib_process_signal_event_data (vm, ni, et, 1, sizeof *r); |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1605 | r->ip.as_u32 = args->ip4.as_u32; |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1606 | r->sw_if_index = args->sw_if_index; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1607 | mac_address_copy (&r->mac, &args->mac); |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1608 | } |
| 1609 | |
| 1610 | void |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 1611 | wc_arp_set_publisher_node (uword node_index, uword event_type) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1612 | { |
| 1613 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1614 | am->wc_ip4_arp_publisher_node = node_index; |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 1615 | am->wc_ip4_arp_publisher_et = event_type; |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1616 | } |
| 1617 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1618 | static void |
| 1619 | arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e); |
| 1620 | |
| 1621 | static int |
| 1622 | vnet_arp_flush_ip4_over_ethernet_internal (vnet_main_t * vnm, |
| 1623 | vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 1624 | * args) |
| 1625 | { |
| 1626 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1627 | ethernet_arp_ip4_entry_t *e; |
| 1628 | ethernet_arp_interface_t *eai; |
| 1629 | |
| 1630 | if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index) |
| 1631 | return 0; |
| 1632 | |
| 1633 | eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index]; |
| 1634 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1635 | e = arp_entry_find (eai, &args->ip4); |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1636 | |
| 1637 | if (NULL != e) |
| 1638 | { |
| 1639 | adj_nbr_walk_nh4 (e->sw_if_index, |
| 1640 | &e->ip4_address, arp_mk_incomplete_walk, e); |
| 1641 | |
| 1642 | /* |
| 1643 | * The difference between flush and unset, is that an unset |
| 1644 | * means delete for static and dynamic entries. A flush |
| 1645 | * means delete only for dynamic. Flushing is what the DP |
| 1646 | * does in response to interface events. unset is only done |
| 1647 | * by the control plane. |
| 1648 | */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1649 | if (e->flags & IP_NEIGHBOR_FLAG_STATIC) |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1650 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1651 | e->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC; |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1652 | } |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1653 | else if (e->flags & IP_NEIGHBOR_FLAG_DYNAMIC) |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1654 | { |
| 1655 | arp_entry_free (eai, e); |
| 1656 | } |
| 1657 | } |
| 1658 | return (0); |
| 1659 | } |
| 1660 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1661 | /* |
| 1662 | * arp_add_del_interface_address |
| 1663 | * |
| 1664 | * callback when an interface address is added or deleted |
| 1665 | */ |
| 1666 | static void |
| 1667 | arp_add_del_interface_address (ip4_main_t * im, |
| 1668 | uword opaque, |
| 1669 | u32 sw_if_index, |
| 1670 | ip4_address_t * address, |
| 1671 | u32 address_length, |
| 1672 | u32 if_address_index, u32 is_del) |
| 1673 | { |
| 1674 | /* |
| 1675 | * Flush the ARP cache of all entries covered by the address |
| 1676 | * that is being removed. |
| 1677 | */ |
| 1678 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1679 | ethernet_arp_ip4_entry_t *e; |
| 1680 | |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 1681 | if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1682 | return; |
| 1683 | |
| 1684 | if (is_del) |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1685 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1686 | ethernet_arp_interface_t *eai; |
| 1687 | u32 i, *to_delete = 0; |
| 1688 | hash_pair_t *pair; |
| 1689 | |
| 1690 | eai = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
| 1691 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1692 | /* *INDENT-OFF* */ |
| 1693 | hash_foreach_pair (pair, eai->arp_entries, |
| 1694 | ({ |
| 1695 | e = pool_elt_at_index(am->ip4_entry_pool, |
| 1696 | pair->value[0]); |
| 1697 | if (ip4_destination_matches_route (im, &e->ip4_address, |
| 1698 | address, address_length)) |
| 1699 | { |
| 1700 | vec_add1 (to_delete, e - am->ip4_entry_pool); |
| 1701 | } |
| 1702 | })); |
| 1703 | /* *INDENT-ON* */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1704 | |
| 1705 | for (i = 0; i < vec_len (to_delete); i++) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1706 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1707 | e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]); |
| 1708 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1709 | vnet_arp_set_ip4_over_ethernet_rpc_args_t delme = { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1710 | .ip4.as_u32 = e->ip4_address.as_u32, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1711 | .sw_if_index = e->sw_if_index, |
| 1712 | .flags = ETHERNET_ARP_ARGS_FLUSH, |
| 1713 | }; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1714 | mac_address_copy (&delme.mac, &e->mac); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1715 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1716 | vnet_arp_flush_ip4_over_ethernet_internal (vnet_get_main (), |
| 1717 | &delme); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1718 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1719 | |
| 1720 | vec_free (to_delete); |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1721 | } |
| 1722 | } |
| 1723 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 1724 | static void |
| 1725 | arp_table_bind (ip4_main_t * im, |
| 1726 | uword opaque, |
| 1727 | u32 sw_if_index, u32 new_fib_index, u32 old_fib_index) |
| 1728 | { |
| 1729 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1730 | ethernet_arp_interface_t *eai; |
| 1731 | ethernet_arp_ip4_entry_t *e; |
| 1732 | hash_pair_t *pair; |
| 1733 | |
| 1734 | /* |
| 1735 | * the IP table that the interface is bound to has changed. |
| 1736 | * reinstall all the adj fibs. |
| 1737 | */ |
| 1738 | |
| 1739 | if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index) |
| 1740 | return; |
| 1741 | |
| 1742 | eai = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
| 1743 | |
| 1744 | /* *INDENT-OFF* */ |
| 1745 | hash_foreach_pair (pair, eai->arp_entries, |
| 1746 | ({ |
| 1747 | e = pool_elt_at_index(am->ip4_entry_pool, |
| 1748 | pair->value[0]); |
| 1749 | /* |
| 1750 | * remove the adj-fib from the old table and add to the new |
| 1751 | */ |
| 1752 | arp_adj_fib_remove(e, old_fib_index); |
| 1753 | arp_adj_fib_add(e, new_fib_index); |
| 1754 | })); |
| 1755 | /* *INDENT-ON* */ |
| 1756 | |
| 1757 | } |
| 1758 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1759 | static clib_error_t * |
| 1760 | ethernet_arp_init (vlib_main_t * vm) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1761 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1762 | ethernet_arp_main_t *am = ðernet_arp_main; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1763 | ip4_main_t *im = &ip4_main; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1764 | clib_error_t *error; |
| 1765 | pg_node_t *pn; |
Dave Barach | 1f49ed6 | 2016-02-24 11:29:06 -0500 | [diff] [blame] | 1766 | |
| 1767 | if ((error = vlib_call_init_function (vm, ethernet_init))) |
| 1768 | return error; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1769 | |
| 1770 | ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index); |
| 1771 | |
| 1772 | pn = pg_get_node (arp_input_node.index); |
| 1773 | pn->unformat_edit = unformat_pg_arp_header; |
| 1774 | |
| 1775 | am->opcode_by_name = hash_create_string (0, sizeof (uword)); |
| 1776 | #define _(o) hash_set_mem (am->opcode_by_name, #o, ETHERNET_ARP_OPCODE_##o); |
| 1777 | foreach_ethernet_arp_opcode; |
| 1778 | #undef _ |
| 1779 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1780 | /* $$$ configurable */ |
| 1781 | am->limit_arp_cache_size = 50000; |
| 1782 | |
| 1783 | am->pending_resolutions_by_address = hash_create (0, sizeof (uword)); |
| 1784 | am->mac_changes_by_address = hash_create (0, sizeof (uword)); |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1785 | am->wc_ip4_arp_publisher_node = (uword) ~ 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1786 | |
| 1787 | /* don't trace ARP error packets */ |
| 1788 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1789 | vlib_node_runtime_t *rt = |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1790 | vlib_node_get_runtime (vm, arp_input_node.index); |
| 1791 | |
| 1792 | #define _(a,b) \ |
| 1793 | vnet_pcap_drop_trace_filter_add_del \ |
| 1794 | (rt->errors[ETHERNET_ARP_ERROR_##a], \ |
| 1795 | 1 /* is_add */); |
| 1796 | foreach_ethernet_arp_error |
| 1797 | #undef _ |
| 1798 | } |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1799 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1800 | ip4_add_del_interface_address_callback_t cb; |
| 1801 | cb.function = arp_add_del_interface_address; |
| 1802 | cb.function_opaque = 0; |
| 1803 | vec_add1 (im->add_del_interface_address_callbacks, cb); |
| 1804 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 1805 | ip4_table_bind_callback_t cbt; |
| 1806 | cbt.function = arp_table_bind; |
| 1807 | cbt.function_opaque = 0; |
| 1808 | vec_add1 (im->table_bind_callbacks, cbt); |
| 1809 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | VLIB_INIT_FUNCTION (ethernet_arp_init); |
| 1814 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1815 | static void |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1816 | arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e) |
| 1817 | { |
| 1818 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1819 | |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 1820 | arp_adj_fib_remove |
| 1821 | (e, ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1822 | hash_unset (eai->arp_entries, e->ip4_address.as_u32); |
| 1823 | pool_put (am->ip4_entry_pool, e); |
| 1824 | } |
| 1825 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1826 | static inline int |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1827 | vnet_arp_unset_ip4_over_ethernet_internal (vnet_main_t * vnm, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1828 | vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 1829 | * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1830 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1831 | ethernet_arp_main_t *am = ðernet_arp_main; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1832 | ethernet_arp_ip4_entry_t *e; |
| 1833 | ethernet_arp_interface_t *eai; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1834 | |
Matthew Smith | 66c0adf | 2017-08-09 16:30:43 -0500 | [diff] [blame] | 1835 | if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index) |
| 1836 | return 0; |
| 1837 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1838 | eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1839 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1840 | e = arp_entry_find (eai, &args->ip4); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1841 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1842 | if (NULL != e) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1843 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 1844 | adj_nbr_walk_nh4 (e->sw_if_index, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1845 | &e->ip4_address, arp_mk_incomplete_walk, e); |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 1846 | arp_entry_free (eai, e); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1847 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1848 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1849 | return 0; |
| 1850 | } |
| 1851 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1852 | |
| 1853 | static int |
| 1854 | vnet_arp_populate_ip4_over_ethernet_internal (vnet_main_t * vnm, |
| 1855 | vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 1856 | * args) |
| 1857 | { |
| 1858 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1859 | ethernet_arp_ip4_entry_t *e; |
| 1860 | ethernet_arp_interface_t *eai; |
| 1861 | |
Matthew Smith | 66c0adf | 2017-08-09 16:30:43 -0500 | [diff] [blame] | 1862 | vec_validate (am->ethernet_arp_by_sw_if_index, args->sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1863 | eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index]; |
| 1864 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1865 | e = arp_entry_find (eai, &args->ip4); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1866 | |
| 1867 | if (NULL != e) |
| 1868 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1869 | adj_nbr_walk_nh4 (e->sw_if_index, |
| 1870 | &e->ip4_address, arp_mk_complete_walk, e); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1871 | } |
| 1872 | return (0); |
| 1873 | } |
| 1874 | |
| 1875 | static void |
| 1876 | set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 1877 | * a) |
| 1878 | { |
| 1879 | vnet_main_t *vm = vnet_get_main (); |
Damjan Marion | 586afd7 | 2017-04-05 19:18:20 +0200 | [diff] [blame] | 1880 | ASSERT (vlib_get_thread_index () == 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1881 | |
| 1882 | if (a->flags & ETHERNET_ARP_ARGS_REMOVE) |
| 1883 | vnet_arp_unset_ip4_over_ethernet_internal (vm, a); |
| 1884 | else if (a->flags & ETHERNET_ARP_ARGS_FLUSH) |
| 1885 | vnet_arp_flush_ip4_over_ethernet_internal (vm, a); |
| 1886 | else if (a->flags & ETHERNET_ARP_ARGS_POPULATE) |
| 1887 | vnet_arp_populate_ip4_over_ethernet_internal (vm, a); |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1888 | else if (a->flags & ETHERNET_ARP_ARGS_WC_PUB) |
| 1889 | vnet_arp_wc_publish_internal (vm, a); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1890 | else |
| 1891 | vnet_arp_set_ip4_over_ethernet_internal (vm, a); |
| 1892 | } |
| 1893 | |
| 1894 | /** |
| 1895 | * @brief Invoked when the interface's admin state changes |
| 1896 | */ |
| 1897 | static clib_error_t * |
| 1898 | ethernet_arp_sw_interface_up_down (vnet_main_t * vnm, |
| 1899 | u32 sw_if_index, u32 flags) |
| 1900 | { |
| 1901 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1902 | ethernet_arp_ip4_entry_t *e; |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1903 | u32 i, *to_update = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1904 | |
| 1905 | /* *INDENT-OFF* */ |
| 1906 | pool_foreach (e, am->ip4_entry_pool, |
| 1907 | ({ |
| 1908 | if (e->sw_if_index == sw_if_index) |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1909 | vec_add1 (to_update, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1910 | e - am->ip4_entry_pool); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1911 | })); |
| 1912 | /* *INDENT-ON* */ |
| 1913 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1914 | for (i = 0; i < vec_len (to_update); i++) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1915 | { |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1916 | e = pool_elt_at_index (am->ip4_entry_pool, to_update[i]); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1917 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1918 | vnet_arp_set_ip4_over_ethernet_rpc_args_t update_me = { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1919 | .ip4.as_u32 = e->ip4_address.as_u32, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1920 | .sw_if_index = e->sw_if_index, |
| 1921 | }; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1922 | mac_address_copy (&update_me.mac, &e->mac); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1923 | |
| 1924 | if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) |
| 1925 | { |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1926 | update_me.flags = ETHERNET_ARP_ARGS_POPULATE; |
| 1927 | vnet_arp_populate_ip4_over_ethernet_internal (vnm, &update_me); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1928 | } |
| 1929 | else |
| 1930 | { |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1931 | update_me.flags = ETHERNET_ARP_ARGS_FLUSH; |
| 1932 | vnet_arp_flush_ip4_over_ethernet_internal (vnm, &update_me); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1933 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1934 | } |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1935 | vec_free (to_update); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1936 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1937 | return 0; |
| 1938 | } |
| 1939 | |
| 1940 | VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_arp_sw_interface_up_down); |
| 1941 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1942 | static void |
| 1943 | increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t * a) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1944 | { |
| 1945 | u8 old; |
| 1946 | int i; |
| 1947 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1948 | for (i = 3; i >= 0; i--) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1949 | { |
| 1950 | old = a->ip4.as_u8[i]; |
| 1951 | a->ip4.as_u8[i] += 1; |
| 1952 | if (old < a->ip4.as_u8[i]) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1953 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1954 | } |
| 1955 | |
| 1956 | for (i = 5; i >= 0; i--) |
| 1957 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1958 | old = a->mac.bytes[i]; |
| 1959 | a->mac.bytes[i] += 1; |
| 1960 | if (old < a->mac.bytes[i]) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1961 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1962 | } |
| 1963 | } |
| 1964 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1965 | int |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1966 | vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1967 | u32 sw_if_index, |
| 1968 | const ethernet_arp_ip4_over_ethernet_address_t |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1969 | * a, ip_neighbor_flags_t flags) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1970 | { |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 1971 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { |
| 1972 | .sw_if_index = sw_if_index, |
| 1973 | .nbr_flags = flags, |
| 1974 | .flags = 0, |
| 1975 | .ip4.as_u32 = a->ip4.as_u32, |
| 1976 | .mac = a->mac, |
| 1977 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1978 | |
| 1979 | vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback, |
| 1980 | (u8 *) & args, sizeof (args)); |
| 1981 | return 0; |
| 1982 | } |
| 1983 | |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 1984 | void |
| 1985 | proxy_arp_walk (proxy_arp_walk_t cb, void *data) |
| 1986 | { |
| 1987 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1988 | ethernet_proxy_arp_t *pa; |
| 1989 | |
| 1990 | vec_foreach (pa, am->proxy_arps) |
| 1991 | { |
| 1992 | if (!cb (&pa->lo_addr, &pa->hi_addr, pa->fib_index, data)) |
| 1993 | break; |
| 1994 | } |
| 1995 | } |
| 1996 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1997 | int |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1998 | vnet_proxy_arp_add_del (ip4_address_t * lo_addr, |
| 1999 | ip4_address_t * hi_addr, u32 fib_index, int is_del) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2000 | { |
| 2001 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2002 | ethernet_proxy_arp_t *pa; |
| 2003 | u32 found_at_index = ~0; |
| 2004 | |
| 2005 | vec_foreach (pa, am->proxy_arps) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2006 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 2007 | if (pa->lo_addr.as_u32 == lo_addr->as_u32 && |
| 2008 | pa->hi_addr.as_u32 == hi_addr->as_u32 && pa->fib_index == fib_index) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2009 | { |
| 2010 | found_at_index = pa - am->proxy_arps; |
| 2011 | break; |
| 2012 | } |
| 2013 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2014 | |
| 2015 | if (found_at_index != ~0) |
| 2016 | { |
| 2017 | /* Delete, otherwise it's already in the table */ |
| 2018 | if (is_del) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2019 | vec_delete (am->proxy_arps, 1, found_at_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2020 | return 0; |
| 2021 | } |
| 2022 | /* delete, no such entry */ |
| 2023 | if (is_del) |
| 2024 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
| 2025 | |
| 2026 | /* add, not in table */ |
| 2027 | vec_add2 (am->proxy_arps, pa, 1); |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 2028 | pa->lo_addr.as_u32 = lo_addr->as_u32; |
| 2029 | pa->hi_addr.as_u32 = hi_addr->as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2030 | pa->fib_index = fib_index; |
| 2031 | return 0; |
| 2032 | } |
| 2033 | |
| 2034 | /* |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 2035 | * Remove any proxy arp entries asdociated with the |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2036 | * specificed fib. |
| 2037 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2038 | int |
| 2039 | vnet_proxy_arp_fib_reset (u32 fib_id) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2040 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2041 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2042 | ethernet_proxy_arp_t *pa; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2043 | u32 *entries_to_delete = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2044 | u32 fib_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2045 | int i; |
| 2046 | |
Neale Ranns | 107e7d4 | 2017-04-11 09:55:19 -0700 | [diff] [blame] | 2047 | fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id); |
| 2048 | if (~0 == fib_index) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2049 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2050 | |
| 2051 | vec_foreach (pa, am->proxy_arps) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2052 | { |
| 2053 | if (pa->fib_index == fib_index) |
| 2054 | { |
| 2055 | vec_add1 (entries_to_delete, pa - am->proxy_arps); |
| 2056 | } |
| 2057 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2058 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2059 | for (i = 0; i < vec_len (entries_to_delete); i++) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2060 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2061 | vec_delete (am->proxy_arps, 1, entries_to_delete[i]); |
| 2062 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2063 | |
| 2064 | vec_free (entries_to_delete); |
| 2065 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2066 | return 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2067 | } |
| 2068 | |
| 2069 | static clib_error_t * |
| 2070 | ip_arp_add_del_command_fn (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2071 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2072 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2073 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2074 | u32 sw_if_index; |
| 2075 | ethernet_arp_ip4_over_ethernet_address_t lo_addr, hi_addr, addr; |
| 2076 | int addr_valid = 0; |
| 2077 | int is_del = 0; |
| 2078 | int count = 1; |
| 2079 | u32 fib_index = 0; |
| 2080 | u32 fib_id; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2081 | int is_proxy = 0; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2082 | ip_neighbor_flags_t flags; |
| 2083 | |
| 2084 | flags = IP_NEIGHBOR_FLAG_NONE; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2085 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2086 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2087 | { |
| 2088 | /* set ip arp TenGigE1/1/0/1 1.2.3.4 aa:bb:... or aabb.ccdd... */ |
| 2089 | if (unformat (input, "%U %U %U", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2090 | unformat_vnet_sw_interface, vnm, &sw_if_index, |
| 2091 | unformat_ip4_address, &addr.ip4, |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2092 | unformat_mac_address_t, &addr.mac)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2093 | addr_valid = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2094 | |
| 2095 | else if (unformat (input, "delete") || unformat (input, "del")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2096 | is_del = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2097 | |
| 2098 | else if (unformat (input, "static")) |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2099 | flags |= IP_NEIGHBOR_FLAG_STATIC; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2100 | |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2101 | else if (unformat (input, "no-fib-entry")) |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2102 | flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2103 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2104 | else if (unformat (input, "count %d", &count)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2105 | ; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2106 | |
| 2107 | else if (unformat (input, "fib-id %d", &fib_id)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2108 | { |
Neale Ranns | 107e7d4 | 2017-04-11 09:55:19 -0700 | [diff] [blame] | 2109 | fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id); |
| 2110 | |
| 2111 | if (~0 == fib_index) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2112 | return clib_error_return (0, "fib ID %d doesn't exist\n", fib_id); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2113 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2114 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2115 | else if (unformat (input, "proxy %U - %U", |
| 2116 | unformat_ip4_address, &lo_addr.ip4, |
| 2117 | unformat_ip4_address, &hi_addr.ip4)) |
| 2118 | is_proxy = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2119 | else |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2120 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2121 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2122 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2123 | if (is_proxy) |
| 2124 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2125 | (void) vnet_proxy_arp_add_del (&lo_addr.ip4, &hi_addr.ip4, |
| 2126 | fib_index, is_del); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2127 | return 0; |
| 2128 | } |
| 2129 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2130 | if (addr_valid) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2131 | { |
| 2132 | int i; |
| 2133 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2134 | for (i = 0; i < count; i++) |
| 2135 | { |
| 2136 | if (is_del == 0) |
| 2137 | { |
| 2138 | uword event_type, *event_data = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2139 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2140 | /* Park the debug CLI until the arp entry is installed */ |
| 2141 | vnet_register_ip4_arp_resolution_event |
| 2142 | (vnm, &addr.ip4, vlib_current_process (vm), |
| 2143 | 1 /* type */ , 0 /* data */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2144 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2145 | vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, &addr, flags); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2146 | |
| 2147 | vlib_process_wait_for_event (vm); |
| 2148 | event_type = vlib_process_get_events (vm, &event_data); |
| 2149 | vec_reset_length (event_data); |
| 2150 | if (event_type != 1) |
| 2151 | clib_warning ("event type %d unexpected", event_type); |
| 2152 | } |
| 2153 | else |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2154 | vnet_arp_unset_ip4_over_ethernet (vnm, sw_if_index, &addr); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2155 | |
| 2156 | increment_ip4_and_mac_address (&addr); |
| 2157 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2158 | } |
| 2159 | else |
| 2160 | { |
| 2161 | return clib_error_return (0, "unknown input `%U'", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2162 | format_unformat_error, input); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2163 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2164 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2165 | return 0; |
| 2166 | } |
| 2167 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2168 | /* *INDENT-OFF* */ |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2169 | /*? |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2170 | * Add or delete IPv4 ARP cache entries. |
| 2171 | * |
| 2172 | * @note 'set ip arp' options (e.g. delete, static, 'fib-id <id>', |
| 2173 | * 'count <number>', 'interface ip4_addr mac_addr') can be added in |
| 2174 | * any order and combination. |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2175 | * |
| 2176 | * @cliexpar |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2177 | * @parblock |
| 2178 | * Add or delete IPv4 ARP cache entries as follows. MAC Address can be in |
| 2179 | * either aa:bb:cc:dd:ee:ff format or aabb.ccdd.eeff format. |
| 2180 | * @cliexcmd{set ip arp GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2181 | * @cliexcmd{set ip arp delete GigabitEthernet2/0/0 6.0.0.3 de:ad:be:ef:ba:be} |
| 2182 | * |
| 2183 | * To add or delete an IPv4 ARP cache entry to or from a specific fib |
| 2184 | * table: |
| 2185 | * @cliexcmd{set ip arp fib-id 1 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2186 | * @cliexcmd{set ip arp fib-id 1 delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2187 | * |
| 2188 | * Add or delete IPv4 static ARP cache entries as follows: |
| 2189 | * @cliexcmd{set ip arp static GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2190 | * @cliexcmd{set ip arp static delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2191 | * |
| 2192 | * For testing / debugging purposes, the 'set ip arp' command can add or |
| 2193 | * delete multiple entries. Supply the 'count N' parameter: |
| 2194 | * @cliexcmd{set ip arp count 10 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2195 | * @endparblock |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2196 | ?*/ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2197 | VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2198 | .path = "set ip arp", |
| 2199 | .short_help = |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2200 | "set ip arp [del] <intfc> <ip-address> <mac-address> [static] [no-fib-entry] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2201 | .function = ip_arp_add_del_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2202 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2203 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2204 | |
| 2205 | static clib_error_t * |
| 2206 | set_int_proxy_arp_command_fn (vlib_main_t * vm, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2207 | unformat_input_t * |
| 2208 | input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2209 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2210 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2211 | u32 sw_if_index; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2212 | vnet_sw_interface_t *si; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2213 | int enable = 0; |
| 2214 | int intfc_set = 0; |
| 2215 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2216 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2217 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2218 | if (unformat (input, "%U", unformat_vnet_sw_interface, |
| 2219 | vnm, &sw_if_index)) |
| 2220 | intfc_set = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2221 | else if (unformat (input, "enable") || unformat (input, "on")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2222 | enable = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2223 | else if (unformat (input, "disable") || unformat (input, "off")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2224 | enable = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2225 | else |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2226 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2227 | } |
| 2228 | |
| 2229 | if (intfc_set == 0) |
| 2230 | return clib_error_return (0, "unknown input '%U'", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2231 | format_unformat_error, input); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2232 | |
| 2233 | si = vnet_get_sw_interface (vnm, sw_if_index); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2234 | ASSERT (si); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2235 | if (enable) |
| 2236 | si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2237 | else |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2238 | si->flags &= ~VNET_SW_INTERFACE_FLAG_PROXY_ARP; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2239 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2240 | return 0; |
| 2241 | } |
| 2242 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2243 | /* *INDENT-OFF* */ |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2244 | /*? |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2245 | * Enable proxy-arp on an interface. The vpp stack will answer ARP |
| 2246 | * requests for the indicated address range. Multiple proxy-arp |
| 2247 | * ranges may be provisioned. |
| 2248 | * |
| 2249 | * @note Proxy ARP as a technology is infamous for blackholing traffic. |
| 2250 | * Also, the underlying implementation has not been performance-tuned. |
| 2251 | * Avoid creating an unnecessarily large set of ranges. |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2252 | * |
| 2253 | * @cliexpar |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2254 | * To enable proxy arp on a range of addresses, use: |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2255 | * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11} |
| 2256 | * Append 'del' to delete a range of proxy ARP addresses: |
| 2257 | * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11 del} |
| 2258 | * You must then specifically enable proxy arp on individual interfaces: |
| 2259 | * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 enable} |
| 2260 | * To disable proxy arp on an individual interface: |
| 2261 | * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 disable} |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2262 | ?*/ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2263 | VLIB_CLI_COMMAND (set_int_proxy_enable_command, static) = { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2264 | .path = "set interface proxy-arp", |
| 2265 | .short_help = |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2266 | "set interface proxy-arp <intfc> [enable|disable]", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2267 | .function = set_int_proxy_arp_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2268 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2269 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2270 | |
| 2271 | |
| 2272 | /* |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2273 | * ARP/ND Termination in a L2 Bridge Domain based on IP4/IP6 to MAC |
| 2274 | * hash tables mac_by_ip4 and mac_by_ip6 for each BD. |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2275 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2276 | typedef enum |
| 2277 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2278 | ARP_TERM_NEXT_L2_OUTPUT, |
| 2279 | ARP_TERM_NEXT_DROP, |
| 2280 | ARP_TERM_N_NEXT, |
| 2281 | } arp_term_next_t; |
| 2282 | |
| 2283 | u32 arp_term_next_node_index[32]; |
| 2284 | |
| 2285 | static uword |
| 2286 | arp_term_l2bd (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2287 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2288 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2289 | l2input_main_t *l2im = &l2input_main; |
| 2290 | u32 n_left_from, next_index, *from, *to_next; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2291 | u32 n_replies_sent = 0; |
| 2292 | u16 last_bd_index = ~0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2293 | l2_bridge_domain_t *last_bd_config = 0; |
| 2294 | l2_input_config_t *cfg0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2295 | |
| 2296 | from = vlib_frame_vector_args (frame); |
| 2297 | n_left_from = frame->n_vectors; |
| 2298 | next_index = node->cached_next_index; |
| 2299 | |
| 2300 | while (n_left_from > 0) |
| 2301 | { |
| 2302 | u32 n_left_to_next; |
| 2303 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2304 | vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2305 | |
| 2306 | while (n_left_from > 0 && n_left_to_next > 0) |
| 2307 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2308 | vlib_buffer_t *p0; |
| 2309 | ethernet_header_t *eth0; |
| 2310 | ethernet_arp_header_t *arp0; |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2311 | ip6_header_t *iph0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2312 | u8 *l3h0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2313 | u32 pi0, error0, next0, sw_if_index0; |
| 2314 | u16 ethertype0; |
| 2315 | u16 bd_index0; |
| 2316 | u32 ip0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2317 | u8 *macp0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2318 | |
| 2319 | pi0 = from[0]; |
| 2320 | to_next[0] = pi0; |
| 2321 | from += 1; |
| 2322 | to_next += 1; |
| 2323 | n_left_from -= 1; |
| 2324 | n_left_to_next -= 1; |
| 2325 | |
| 2326 | p0 = vlib_get_buffer (vm, pi0); |
Eyal Bari | a0623f8 | 2017-03-30 03:05:06 +0300 | [diff] [blame] | 2327 | // Terminate only local (SHG == 0) ARP |
| 2328 | if (vnet_buffer (p0)->l2.shg != 0) |
| 2329 | goto next_l2_feature; |
| 2330 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2331 | eth0 = vlib_buffer_get_current (p0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2332 | l3h0 = (u8 *) eth0 + vnet_buffer (p0)->l2.l2_len; |
| 2333 | ethertype0 = clib_net_to_host_u16 (*(u16 *) (l3h0 - 2)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2334 | arp0 = (ethernet_arp_header_t *) l3h0; |
| 2335 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2336 | if (ethertype0 != ETHERNET_TYPE_ARP) |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2337 | goto check_ip6_nd; |
| 2338 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2339 | if ((arp0->opcode != |
| 2340 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request)) && |
| 2341 | (arp0->opcode != |
| 2342 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))) |
| 2343 | goto check_ip6_nd; |
| 2344 | |
| 2345 | /* Must be ARP request/reply packet here */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2346 | if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && |
| 2347 | (p0->flags & VLIB_BUFFER_IS_TRACED))) |
| 2348 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2349 | u8 *t0 = vlib_add_trace (vm, node, p0, |
| 2350 | sizeof (ethernet_arp_input_trace_t)); |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2351 | clib_memcpy_fast (t0, l3h0, |
| 2352 | sizeof (ethernet_arp_input_trace_t)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2353 | } |
| 2354 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2355 | error0 = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2356 | error0 = |
| 2357 | (arp0->l2_type != |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2358 | clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) |
| 2359 | ? ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2360 | error0 = |
| 2361 | (arp0->l3_type != |
| 2362 | clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ? |
| 2363 | ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2364 | |
| 2365 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 2366 | |
| 2367 | if (error0) |
| 2368 | goto drop; |
| 2369 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2370 | /* Trash ARP packets whose ARP-level source addresses do not |
John Lo | 0131b6c | 2018-06-25 12:35:21 -0400 | [diff] [blame] | 2371 | match, or if requester address is mcast */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2372 | if (PREDICT_FALSE |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2373 | (!ethernet_mac_address_equal (eth0->src_address, |
| 2374 | arp0->ip4_over_ethernet[0]. |
| 2375 | mac.bytes)) |
| 2376 | || ethernet_address_cast (arp0->ip4_over_ethernet[0].mac.bytes)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2377 | { |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2378 | /* VRRP virtual MAC may be different to SMAC in ARP reply */ |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2379 | if (!ethernet_mac_address_equal |
| 2380 | (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix)) |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2381 | { |
| 2382 | error0 = ETHERNET_ARP_ERROR_l2_address_mismatch; |
| 2383 | goto drop; |
| 2384 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2385 | } |
John Lo | 0131b6c | 2018-06-25 12:35:21 -0400 | [diff] [blame] | 2386 | if (PREDICT_FALSE |
| 2387 | (ip4_address_is_multicast (&arp0->ip4_over_ethernet[0].ip4))) |
| 2388 | { |
| 2389 | error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local; |
| 2390 | goto drop; |
| 2391 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2392 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2393 | /* Check if anyone want ARP request events for L2 BDs */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2394 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2395 | ethernet_arp_main_t *am = ðernet_arp_main; |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 2396 | if (am->wc_ip4_arp_publisher_node != (uword) ~ 0) |
| 2397 | vnet_arp_wc_publish (sw_if_index0, &arp0->ip4_over_ethernet[0]); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2398 | } |
| 2399 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2400 | /* lookup BD mac_by_ip4 hash table for MAC entry */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2401 | ip0 = arp0->ip4_over_ethernet[1].ip4.as_u32; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2402 | bd_index0 = vnet_buffer (p0)->l2.bd_index; |
| 2403 | if (PREDICT_FALSE ((bd_index0 != last_bd_index) |
| 2404 | || (last_bd_index == (u16) ~ 0))) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2405 | { |
| 2406 | last_bd_index = bd_index0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2407 | last_bd_config = vec_elt_at_index (l2im->bd_configs, bd_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2408 | } |
| 2409 | macp0 = (u8 *) hash_get (last_bd_config->mac_by_ip4, ip0); |
| 2410 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2411 | if (PREDICT_FALSE (!macp0)) |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2412 | goto next_l2_feature; /* MAC not found */ |
Neale Ranns | d2bb614 | 2019-03-04 14:11:25 -0800 | [diff] [blame^] | 2413 | if (PREDICT_FALSE (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 2414 | arp0->ip4_over_ethernet[1].ip4.as_u32)) |
| 2415 | goto next_l2_feature; /* GARP */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2416 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2417 | /* MAC found, send ARP reply - |
| 2418 | Convert ARP request packet to ARP reply */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2419 | arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply); |
| 2420 | arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0]; |
| 2421 | arp0->ip4_over_ethernet[0].ip4.as_u32 = ip0; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2422 | mac_address_from_bytes (&arp0->ip4_over_ethernet[0].mac, macp0); |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2423 | clib_memcpy_fast (eth0->dst_address, eth0->src_address, 6); |
| 2424 | clib_memcpy_fast (eth0->src_address, macp0, 6); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2425 | n_replies_sent += 1; |
| 2426 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2427 | output_response: |
| 2428 | /* For BVI, need to use l2-fwd node to send ARP reply as |
| 2429 | l2-output node cannot output packet to BVI properly */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2430 | cfg0 = vec_elt_at_index (l2im->configs, sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2431 | if (PREDICT_FALSE (cfg0->bvi)) |
| 2432 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2433 | vnet_buffer (p0)->l2.feature_bitmap |= L2INPUT_FEAT_FWD; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2434 | vnet_buffer (p0)->sw_if_index[VLIB_RX] = 0; |
| 2435 | goto next_l2_feature; |
| 2436 | } |
| 2437 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2438 | /* Send ARP/ND reply back out input interface through l2-output */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2439 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 2440 | next0 = ARP_TERM_NEXT_L2_OUTPUT; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2441 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2442 | to_next, n_left_to_next, pi0, |
| 2443 | next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2444 | continue; |
| 2445 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2446 | check_ip6_nd: |
| 2447 | /* IP6 ND event notification or solicitation handling to generate |
| 2448 | local response instead of flooding */ |
| 2449 | iph0 = (ip6_header_t *) l3h0; |
| 2450 | if (PREDICT_FALSE (ethertype0 == ETHERNET_TYPE_IP6 && |
| 2451 | iph0->protocol == IP_PROTOCOL_ICMP6 && |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2452 | !ip6_address_is_unspecified |
| 2453 | (&iph0->src_address))) |
| 2454 | { |
| 2455 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2456 | if (vnet_ip6_nd_term |
| 2457 | (vm, node, p0, eth0, iph0, sw_if_index0, |
Eyal Bari | a0623f8 | 2017-03-30 03:05:06 +0300 | [diff] [blame] | 2458 | vnet_buffer (p0)->l2.bd_index)) |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2459 | goto output_response; |
| 2460 | } |
| 2461 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2462 | next_l2_feature: |
| 2463 | { |
John Lo | beb0b2e | 2017-07-22 00:21:36 -0400 | [diff] [blame] | 2464 | next0 = vnet_l2_feature_next (p0, arp_term_next_node_index, |
| 2465 | L2INPUT_FEAT_ARP_TERM); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2466 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2467 | to_next, n_left_to_next, |
| 2468 | pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2469 | continue; |
| 2470 | } |
| 2471 | |
| 2472 | drop: |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2473 | if (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 || |
| 2474 | (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 2475 | arp0->ip4_over_ethernet[1].ip4.as_u32)) |
| 2476 | { |
| 2477 | error0 = ETHERNET_ARP_ERROR_gratuitous_arp; |
| 2478 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2479 | next0 = ARP_TERM_NEXT_DROP; |
| 2480 | p0->error = node->errors[error0]; |
| 2481 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2482 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2483 | to_next, n_left_to_next, pi0, |
| 2484 | next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2485 | } |
| 2486 | |
| 2487 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 2488 | } |
| 2489 | |
| 2490 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2491 | ETHERNET_ARP_ERROR_replies_sent, n_replies_sent); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2492 | return frame->n_vectors; |
| 2493 | } |
| 2494 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2495 | /* *INDENT-OFF* */ |
| 2496 | VLIB_REGISTER_NODE (arp_term_l2bd_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2497 | .function = arp_term_l2bd, |
| 2498 | .name = "arp-term-l2bd", |
| 2499 | .vector_size = sizeof (u32), |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2500 | .n_errors = ETHERNET_ARP_N_ERROR, |
| 2501 | .error_strings = ethernet_arp_error_strings, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2502 | .n_next_nodes = ARP_TERM_N_NEXT, |
| 2503 | .next_nodes = { |
| 2504 | [ARP_TERM_NEXT_L2_OUTPUT] = "l2-output", |
| 2505 | [ARP_TERM_NEXT_DROP] = "error-drop", |
| 2506 | }, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2507 | .format_buffer = format_ethernet_arp_header, |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2508 | .format_trace = format_arp_term_input_trace, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2509 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2510 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2511 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2512 | clib_error_t * |
| 2513 | arp_term_init (vlib_main_t * vm) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2514 | { |
| 2515 | // Initialize the feature next-node indexes |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2516 | feat_bitmap_init_next_nodes (vm, |
| 2517 | arp_term_l2bd_node.index, |
| 2518 | L2INPUT_N_FEAT, |
| 2519 | l2input_get_feat_names (), |
| 2520 | arp_term_next_node_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2521 | return 0; |
| 2522 | } |
| 2523 | |
| 2524 | VLIB_INIT_FUNCTION (arp_term_init); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2525 | |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2526 | void |
| 2527 | change_arp_mac (u32 sw_if_index, ethernet_arp_ip4_entry_t * e) |
| 2528 | { |
| 2529 | if (e->sw_if_index == sw_if_index) |
| 2530 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2531 | adj_nbr_walk_nh4 (e->sw_if_index, |
| 2532 | &e->ip4_address, arp_mk_complete_walk, e); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2533 | } |
| 2534 | } |
| 2535 | |
| 2536 | void |
Neale Ranns | 3be6b28 | 2016-12-20 14:24:01 +0000 | [diff] [blame] | 2537 | ethernet_arp_change_mac (u32 sw_if_index) |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2538 | { |
| 2539 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2540 | ethernet_arp_ip4_entry_t *e; |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 2541 | adj_index_t ai; |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2542 | |
| 2543 | /* *INDENT-OFF* */ |
| 2544 | pool_foreach (e, am->ip4_entry_pool, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2545 | ({ |
| 2546 | change_arp_mac (sw_if_index, e); |
| 2547 | })); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2548 | /* *INDENT-ON* */ |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 2549 | |
| 2550 | ai = adj_glean_get (FIB_PROTOCOL_IP4, sw_if_index); |
| 2551 | |
| 2552 | if (ADJ_INDEX_INVALID != ai) |
| 2553 | adj_glean_update_rewrite (ai); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2554 | } |
| 2555 | |
John Lo | 7e9743a | 2017-09-23 08:59:58 -0400 | [diff] [blame] | 2556 | void |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2557 | send_ip4_garp (vlib_main_t * vm, u32 sw_if_index) |
Neale Ranns | 25b0494 | 2018-04-04 09:34:50 -0700 | [diff] [blame] | 2558 | { |
| 2559 | ip4_main_t *i4m = &ip4_main; |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2560 | ip4_address_t *ip4_addr = ip4_interface_first_address (i4m, sw_if_index, 0); |
Neale Ranns | 25b0494 | 2018-04-04 09:34:50 -0700 | [diff] [blame] | 2561 | |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2562 | send_ip4_garp_w_addr (vm, ip4_addr, sw_if_index); |
Neale Ranns | 25b0494 | 2018-04-04 09:34:50 -0700 | [diff] [blame] | 2563 | } |
| 2564 | |
| 2565 | void |
| 2566 | send_ip4_garp_w_addr (vlib_main_t * vm, |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2567 | const ip4_address_t * ip4_addr, u32 sw_if_index) |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2568 | { |
| 2569 | ip4_main_t *i4m = &ip4_main; |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2570 | vnet_main_t *vnm = vnet_get_main (); |
| 2571 | u8 *rewrite, rewrite_len; |
| 2572 | vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2573 | |
| 2574 | if (ip4_addr) |
| 2575 | { |
| 2576 | clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d", |
| 2577 | format_ip4_address, ip4_addr, sw_if_index); |
| 2578 | |
| 2579 | /* Form GARP packet for output - Gratuitous ARP is an ARP request packet |
| 2580 | where the interface IP/MAC pair is used for both source and request |
| 2581 | MAC/IP pairs in the request */ |
| 2582 | u32 bi = 0; |
| 2583 | ethernet_arp_header_t *h = vlib_packet_template_get_packet |
| 2584 | (vm, &i4m->ip4_arp_request_packet_template, &bi); |
John Lo | 084606b | 2018-06-19 15:27:48 -0400 | [diff] [blame] | 2585 | |
| 2586 | if (!h) |
| 2587 | return; |
| 2588 | |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2589 | mac_address_from_bytes (&h->ip4_over_ethernet[0].mac, hi->hw_address); |
| 2590 | mac_address_from_bytes (&h->ip4_over_ethernet[1].mac, hi->hw_address); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2591 | h->ip4_over_ethernet[0].ip4 = ip4_addr[0]; |
| 2592 | h->ip4_over_ethernet[1].ip4 = ip4_addr[0]; |
| 2593 | |
| 2594 | /* Setup MAC header with ARP Etype and broadcast DMAC */ |
| 2595 | vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2596 | rewrite = |
| 2597 | ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_ARP, |
| 2598 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST); |
| 2599 | rewrite_len = vec_len (rewrite); |
| 2600 | vlib_buffer_advance (b, -rewrite_len); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2601 | ethernet_header_t *e = vlib_buffer_get_current (b); |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2602 | clib_memcpy_fast (e->dst_address, rewrite, rewrite_len); |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2603 | vec_free (rewrite); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2604 | |
| 2605 | /* Send GARP packet out the specified interface */ |
| 2606 | vnet_buffer (b)->sw_if_index[VLIB_RX] = |
| 2607 | vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; |
| 2608 | vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); |
| 2609 | u32 *to_next = vlib_frame_vector_args (f); |
| 2610 | to_next[0] = bi; |
| 2611 | f->n_vectors = 1; |
| 2612 | vlib_put_frame_to_node (vm, hi->output_node_index, f); |
| 2613 | } |
| 2614 | } |
| 2615 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2616 | /* |
Pavel Kotucek | 18934e6 | 2018-11-14 09:24:16 +0100 | [diff] [blame] | 2617 | * Remove any arp entries asociated with the specificed interface |
| 2618 | */ |
Neale Ranns | 8f215b4 | 2019-02-22 12:40:53 +0000 | [diff] [blame] | 2619 | static clib_error_t * |
Pavel Kotucek | 18934e6 | 2018-11-14 09:24:16 +0100 | [diff] [blame] | 2620 | vnet_arp_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) |
| 2621 | { |
| 2622 | if (!is_add && sw_if_index != ~0) |
| 2623 | { |
| 2624 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2625 | ethernet_arp_ip4_entry_t *e; |
| 2626 | /* *INDENT-OFF* */ |
| 2627 | pool_foreach (e, am->ip4_entry_pool, ({ |
| 2628 | if (e->sw_if_index != sw_if_index) |
| 2629 | continue; |
Neale Ranns | 3702930 | 2018-08-10 05:30:06 -0700 | [diff] [blame] | 2630 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { |
| 2631 | .sw_if_index = sw_if_index, |
| 2632 | .ip4 = e->ip4_address, |
| 2633 | }; |
Pavel Kotucek | 18934e6 | 2018-11-14 09:24:16 +0100 | [diff] [blame] | 2634 | vnet_arp_unset_ip4_over_ethernet_internal (vnm, &args); |
| 2635 | })); |
| 2636 | /* *INDENT-ON* */ |
| 2637 | } |
Neale Ranns | 8f215b4 | 2019-02-22 12:40:53 +0000 | [diff] [blame] | 2638 | |
| 2639 | return (NULL); |
Pavel Kotucek | 18934e6 | 2018-11-14 09:24:16 +0100 | [diff] [blame] | 2640 | } |
| 2641 | |
| 2642 | VNET_SW_INTERFACE_ADD_DEL_FUNCTION (vnet_arp_delete_sw_interface); |
| 2643 | |
| 2644 | /* |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2645 | * fd.io coding-style-patch-verification: ON |
| 2646 | * |
| 2647 | * Local Variables: |
| 2648 | * eval: (c-set-style "gnu") |
| 2649 | * End: |
| 2650 | */ |