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> |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 19 | #include <vnet/ip/ip6.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 20 | #include <vnet/ethernet/ethernet.h> |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 21 | #include <vnet/ethernet/arp.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 22 | #include <vnet/l2/l2_input.h> |
| 23 | #include <vppinfra/mhash.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 24 | #include <vnet/fib/ip4_fib.h> |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 25 | #include <vnet/fib/fib_entry_src.h> |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 26 | #include <vnet/adj/adj_nbr.h> |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 27 | #include <vnet/adj/adj_mcast.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 28 | #include <vnet/mpls/mpls.h> |
Neale Ranns | 3b81a1e | 2018-09-06 09:50:26 -0700 | [diff] [blame] | 29 | #include <vnet/l2/feat_bitmap.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 30 | |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 31 | /** |
| 32 | * @file |
| 33 | * @brief IPv4 ARP. |
| 34 | * |
| 35 | * This file contains code to manage the IPv4 ARP tables (IP Address |
| 36 | * to MAC Address lookup). |
| 37 | */ |
| 38 | |
| 39 | |
Dave Barach | f9bd620 | 2015-12-14 13:22:11 -0500 | [diff] [blame] | 40 | void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); |
| 41 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 42 | /** |
| 43 | * @brief Per-interface ARP configuration and state |
| 44 | */ |
| 45 | typedef struct ethernet_arp_interface_t_ |
| 46 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 47 | /** |
| 48 | * Hash table of ARP entries. |
| 49 | * Since this hash table is per-interface, the key is only the IPv4 address. |
| 50 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 51 | uword *arp_entries; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 52 | } ethernet_arp_interface_t; |
| 53 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 54 | typedef struct |
| 55 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 56 | ip4_address_t lo_addr; |
| 57 | ip4_address_t hi_addr; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 58 | u32 fib_index; |
| 59 | } ethernet_proxy_arp_t; |
| 60 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 61 | typedef struct |
| 62 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 63 | u32 next_index; |
| 64 | uword node_index; |
| 65 | uword type_opaque; |
| 66 | uword data; |
| 67 | /* Used for arp event notification only */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 68 | void *data_callback; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 69 | u32 pid; |
| 70 | } pending_resolution_t; |
| 71 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 72 | typedef struct |
| 73 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 74 | /* Hash tables mapping name to opcode. */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 75 | uword *opcode_by_name; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 76 | |
| 77 | /* lite beer "glean" adjacency handling */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 78 | uword *pending_resolutions_by_address; |
| 79 | pending_resolution_t *pending_resolutions; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 80 | |
| 81 | /* Mac address change notification */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 82 | uword *mac_changes_by_address; |
| 83 | pending_resolution_t *mac_changes; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 84 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 85 | ethernet_arp_ip4_entry_t *ip4_entry_pool; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 86 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 87 | /* ARP attack mitigation */ |
| 88 | u32 arp_delete_rotor; |
| 89 | u32 limit_arp_cache_size; |
| 90 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 91 | /** Per interface state */ |
| 92 | ethernet_arp_interface_t *ethernet_arp_by_sw_if_index; |
| 93 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 94 | /* Proxy arp vector */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 95 | ethernet_proxy_arp_t *proxy_arps; |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 96 | |
| 97 | uword wc_ip4_arp_publisher_node; |
Eyal Bari | c125ecc | 2017-09-20 11:29:17 +0300 | [diff] [blame] | 98 | uword wc_ip4_arp_publisher_et; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 99 | } ethernet_arp_main_t; |
| 100 | |
| 101 | static ethernet_arp_main_t ethernet_arp_main; |
| 102 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 103 | typedef struct |
| 104 | { |
| 105 | u32 sw_if_index; |
| 106 | ethernet_arp_ip4_over_ethernet_address_t a; |
| 107 | int is_static; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 108 | int is_no_fib_entry; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 109 | int flags; |
| 110 | #define ETHERNET_ARP_ARGS_REMOVE (1<<0) |
| 111 | #define ETHERNET_ARP_ARGS_FLUSH (1<<1) |
| 112 | #define ETHERNET_ARP_ARGS_POPULATE (1<<2) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 113 | #define ETHERNET_ARP_ARGS_WC_PUB (1<<3) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 114 | } vnet_arp_set_ip4_over_ethernet_rpc_args_t; |
| 115 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 116 | static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 }; |
| 117 | |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 118 | /* Node index for send_garp_na_process */ |
| 119 | u32 send_garp_na_process_node_index; |
| 120 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 121 | static void |
| 122 | set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 123 | * a); |
| 124 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 125 | static u8 * |
| 126 | format_ethernet_arp_hardware_type (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 127 | { |
| 128 | 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] | 129 | char *t = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 130 | switch (h) |
| 131 | { |
| 132 | #define _(n,f) case n: t = #f; break; |
| 133 | foreach_ethernet_arp_hardware_type; |
| 134 | #undef _ |
| 135 | |
| 136 | default: |
| 137 | return format (s, "unknown 0x%x", h); |
| 138 | } |
| 139 | |
| 140 | return format (s, "%s", t); |
| 141 | } |
| 142 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 143 | static u8 * |
| 144 | format_ethernet_arp_opcode (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 145 | { |
| 146 | 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] | 147 | char *t = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 148 | switch (o) |
| 149 | { |
| 150 | #define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break; |
| 151 | foreach_ethernet_arp_opcode; |
| 152 | #undef _ |
| 153 | |
| 154 | default: |
| 155 | return format (s, "unknown 0x%x", o); |
| 156 | } |
| 157 | |
| 158 | return format (s, "%s", t); |
| 159 | } |
| 160 | |
| 161 | static uword |
| 162 | unformat_ethernet_arp_opcode_host_byte_order (unformat_input_t * input, |
| 163 | va_list * args) |
| 164 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 165 | int *result = va_arg (*args, int *); |
| 166 | ethernet_arp_main_t *am = ðernet_arp_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 167 | int x, i; |
| 168 | |
| 169 | /* Numeric opcode. */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 170 | if (unformat (input, "0x%x", &x) || unformat (input, "%d", &x)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 171 | { |
| 172 | if (x >= (1 << 16)) |
| 173 | return 0; |
| 174 | *result = x; |
| 175 | return 1; |
| 176 | } |
| 177 | |
| 178 | /* Named type. */ |
| 179 | if (unformat_user (input, unformat_vlib_number_by_name, |
| 180 | am->opcode_by_name, &i)) |
| 181 | { |
| 182 | *result = i; |
| 183 | return 1; |
| 184 | } |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static uword |
| 190 | unformat_ethernet_arp_opcode_net_byte_order (unformat_input_t * input, |
| 191 | va_list * args) |
| 192 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 193 | int *result = va_arg (*args, int *); |
| 194 | if (!unformat_user |
| 195 | (input, unformat_ethernet_arp_opcode_host_byte_order, result)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 196 | return 0; |
| 197 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 198 | *result = clib_host_to_net_u16 ((u16) * result); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 199 | return 1; |
| 200 | } |
| 201 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 202 | static u8 * |
| 203 | format_ethernet_arp_header (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 204 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 205 | ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 206 | u32 max_header_bytes = va_arg (*va, u32); |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 207 | u32 indent; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 208 | u16 l2_type, l3_type; |
| 209 | |
| 210 | if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes) |
| 211 | return format (s, "ARP header truncated"); |
| 212 | |
| 213 | l2_type = clib_net_to_host_u16 (a->l2_type); |
| 214 | l3_type = clib_net_to_host_u16 (a->l3_type); |
| 215 | |
| 216 | indent = format_get_indent (s); |
| 217 | |
| 218 | s = format (s, "%U, type %U/%U, address size %d/%d", |
| 219 | format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode), |
| 220 | format_ethernet_arp_hardware_type, l2_type, |
| 221 | format_ethernet_type, l3_type, |
| 222 | a->n_l2_address_bytes, a->n_l3_address_bytes); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 223 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 224 | if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet |
| 225 | && l3_type == ETHERNET_TYPE_IP4) |
| 226 | { |
| 227 | s = format (s, "\n%U%U/%U -> %U/%U", |
| 228 | format_white_space, indent, |
| 229 | format_ethernet_address, a->ip4_over_ethernet[0].ethernet, |
| 230 | format_ip4_address, &a->ip4_over_ethernet[0].ip4, |
| 231 | format_ethernet_address, a->ip4_over_ethernet[1].ethernet, |
| 232 | format_ip4_address, &a->ip4_over_ethernet[1].ip4); |
| 233 | } |
| 234 | else |
| 235 | { |
| 236 | uword n2 = a->n_l2_address_bytes; |
| 237 | uword n3 = a->n_l3_address_bytes; |
| 238 | s = format (s, "\n%U%U/%U -> %U/%U", |
| 239 | format_white_space, indent, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 240 | format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2, |
| 241 | format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3, |
| 242 | format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2, |
| 243 | format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | return s; |
| 247 | } |
| 248 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 249 | u8 * |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 250 | format_ethernet_arp_ip4_entry (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 251 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 252 | vnet_main_t *vnm = va_arg (*va, vnet_main_t *); |
| 253 | ethernet_arp_ip4_entry_t *e = va_arg (*va, ethernet_arp_ip4_entry_t *); |
| 254 | vnet_sw_interface_t *si; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 255 | u8 *flags = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 256 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 257 | if (!e) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 258 | return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 259 | "Flags", "Ethernet", "Interface"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 260 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 261 | si = vnet_get_sw_interface (vnm, e->sw_if_index); |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 262 | |
| 263 | if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 264 | flags = format (flags, "S"); |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 265 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 266 | if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC) |
| 267 | flags = format (flags, "D"); |
| 268 | |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 269 | if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY) |
| 270 | flags = format (flags, "N"); |
| 271 | |
Neale Ranns | 5c994c1 | 2017-08-04 06:22:23 -0700 | [diff] [blame] | 272 | s = format (s, "%=12U%=16U%=6s%=20U%U", |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 273 | format_vlib_time, vnm->vlib_main, e->time_last_updated, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 274 | format_ip4_address, &e->ip4_address, |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 275 | flags ? (char *) flags : "", |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 276 | format_ethernet_address, e->ethernet_address, |
| 277 | format_vnet_sw_interface_name, vnm, si); |
| 278 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 279 | vec_free (flags); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 280 | return s; |
| 281 | } |
| 282 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 283 | typedef struct |
| 284 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 285 | u8 packet_data[64]; |
| 286 | } ethernet_arp_input_trace_t; |
| 287 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 288 | static u8 * |
| 289 | format_ethernet_arp_input_trace (u8 * s, va_list * va) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 290 | { |
| 291 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); |
| 292 | 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] | 293 | 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] | 294 | |
| 295 | s = format (s, "%U", |
| 296 | format_ethernet_arp_header, |
| 297 | t->packet_data, sizeof (t->packet_data)); |
| 298 | |
| 299 | return s; |
| 300 | } |
| 301 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 302 | static u8 * |
| 303 | format_arp_term_input_trace (u8 * s, va_list * va) |
| 304 | { |
| 305 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); |
| 306 | CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); |
| 307 | ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *); |
| 308 | |
| 309 | /* arp-term trace data saved is either arp or ip6/icmp6 packet: |
| 310 | - for arp, the 1st 16-bit field is hw type of value of 0x0001. |
| 311 | - for ip6, the first nibble has value of 6. */ |
| 312 | s = format (s, "%U", t->packet_data[0] == 0 ? |
| 313 | format_ethernet_arp_header : format_ip6_header, |
| 314 | t->packet_data, sizeof (t->packet_data)); |
| 315 | |
| 316 | return s; |
| 317 | } |
| 318 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 319 | static void |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 320 | arp_nbr_probe (ip_adjacency_t * adj) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 321 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 322 | vnet_main_t *vnm = vnet_get_main (); |
| 323 | ip4_main_t *im = &ip4_main; |
| 324 | ip_interface_address_t *ia; |
| 325 | ethernet_arp_header_t *h; |
| 326 | vnet_hw_interface_t *hi; |
| 327 | vnet_sw_interface_t *si; |
| 328 | ip4_address_t *src; |
| 329 | vlib_buffer_t *b; |
| 330 | vlib_main_t *vm; |
| 331 | u32 bi = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 332 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 333 | vm = vlib_get_main (); |
John Lo | cbec1a1 | 2016-07-05 18:34:40 -0400 | [diff] [blame] | 334 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 335 | si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index); |
| 336 | |
| 337 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 338 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 339 | return; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 340 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 341 | |
| 342 | src = |
| 343 | ip4_interface_address_matching_destination (im, |
| 344 | &adj->sub_type.nbr.next_hop. |
| 345 | ip4, |
| 346 | adj->rewrite_header. |
| 347 | sw_if_index, &ia); |
| 348 | if (!src) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 349 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 350 | return; |
| 351 | } |
| 352 | |
| 353 | h = |
| 354 | vlib_packet_template_get_packet (vm, &im->ip4_arp_request_packet_template, |
| 355 | &bi); |
John Lo | 084606b | 2018-06-19 15:27:48 -0400 | [diff] [blame] | 356 | if (!h) |
| 357 | return; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 358 | |
| 359 | hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index); |
| 360 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 361 | clib_memcpy_fast (h->ip4_over_ethernet[0].ethernet, |
| 362 | hi->hw_address, |
| 363 | sizeof (h->ip4_over_ethernet[0].ethernet)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 364 | |
| 365 | h->ip4_over_ethernet[0].ip4 = src[0]; |
| 366 | h->ip4_over_ethernet[1].ip4 = adj->sub_type.nbr.next_hop.ip4; |
| 367 | |
| 368 | b = vlib_get_buffer (vm, bi); |
| 369 | vnet_buffer (b)->sw_if_index[VLIB_RX] = |
| 370 | vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index; |
| 371 | |
| 372 | /* Add encapsulation string for software interface (e.g. ethernet header). */ |
| 373 | vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t)); |
| 374 | vlib_buffer_advance (b, -adj->rewrite_header.data_bytes); |
| 375 | |
| 376 | { |
| 377 | vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); |
| 378 | u32 *to_next = vlib_frame_vector_args (f); |
| 379 | to_next[0] = bi; |
| 380 | f->n_vectors = 1; |
| 381 | vlib_put_frame_to_node (vm, hi->output_node_index, f); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | static void |
| 386 | arp_mk_complete (adj_index_t ai, ethernet_arp_ip4_entry_t * e) |
| 387 | { |
| 388 | adj_nbr_update_rewrite |
| 389 | (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 390 | ethernet_build_rewrite (vnet_get_main (), |
| 391 | e->sw_if_index, |
| 392 | adj_get_link_type (ai), e->ethernet_address)); |
| 393 | } |
| 394 | |
| 395 | static void |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 396 | arp_mk_incomplete (adj_index_t ai) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 397 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 398 | ip_adjacency_t *adj = adj_get (ai); |
| 399 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 400 | adj_nbr_update_rewrite |
| 401 | (ai, |
| 402 | ADJ_NBR_REWRITE_FLAG_INCOMPLETE, |
| 403 | ethernet_build_rewrite (vnet_get_main (), |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 404 | adj->rewrite_header.sw_if_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 405 | VNET_LINK_ARP, |
| 406 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 407 | } |
| 408 | |
| 409 | static ethernet_arp_ip4_entry_t * |
| 410 | arp_entry_find (ethernet_arp_interface_t * eai, const ip4_address_t * addr) |
| 411 | { |
| 412 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 413 | ethernet_arp_ip4_entry_t *e = NULL; |
| 414 | uword *p; |
| 415 | |
| 416 | if (NULL != eai->arp_entries) |
| 417 | { |
| 418 | p = hash_get (eai->arp_entries, addr->as_u32); |
| 419 | if (!p) |
| 420 | return (NULL); |
| 421 | |
| 422 | e = pool_elt_at_index (am->ip4_entry_pool, p[0]); |
| 423 | } |
| 424 | |
| 425 | return (e); |
| 426 | } |
| 427 | |
| 428 | static adj_walk_rc_t |
| 429 | arp_mk_complete_walk (adj_index_t ai, void *ctx) |
| 430 | { |
| 431 | ethernet_arp_ip4_entry_t *e = ctx; |
| 432 | |
| 433 | arp_mk_complete (ai, e); |
| 434 | |
| 435 | return (ADJ_WALK_RC_CONTINUE); |
| 436 | } |
| 437 | |
| 438 | static adj_walk_rc_t |
| 439 | arp_mk_incomplete_walk (adj_index_t ai, void *ctx) |
| 440 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 441 | arp_mk_incomplete (ai); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 442 | |
| 443 | return (ADJ_WALK_RC_CONTINUE); |
| 444 | } |
| 445 | |
| 446 | void |
| 447 | arp_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai) |
| 448 | { |
| 449 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 450 | ethernet_arp_interface_t *arp_int; |
| 451 | ethernet_arp_ip4_entry_t *e; |
| 452 | ip_adjacency_t *adj; |
| 453 | |
| 454 | adj = adj_get (ai); |
| 455 | |
| 456 | vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index); |
| 457 | arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
| 458 | e = arp_entry_find (arp_int, &adj->sub_type.nbr.next_hop.ip4); |
| 459 | |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 460 | switch (adj->lookup_next_index) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 461 | { |
Ole Trøan | 438f630 | 2018-02-15 21:56:06 +0000 | [diff] [blame] | 462 | case IP_LOOKUP_NEXT_GLEAN: |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 463 | adj_glean_update_rewrite (ai); |
| 464 | break; |
| 465 | case IP_LOOKUP_NEXT_ARP: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 466 | if (NULL != e) |
| 467 | { |
| 468 | adj_nbr_walk_nh4 (sw_if_index, |
| 469 | &e->ip4_address, arp_mk_complete_walk, e); |
| 470 | } |
| 471 | else |
| 472 | { |
| 473 | /* |
| 474 | * no matching ARP entry. |
| 475 | * construct the rewrite required to for an ARP packet, and stick |
| 476 | * that in the adj's pipe to smoke. |
| 477 | */ |
| 478 | adj_nbr_update_rewrite |
| 479 | (ai, |
| 480 | ADJ_NBR_REWRITE_FLAG_INCOMPLETE, |
| 481 | ethernet_build_rewrite |
| 482 | (vnm, |
| 483 | sw_if_index, |
| 484 | VNET_LINK_ARP, |
| 485 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 486 | |
| 487 | /* |
| 488 | * since the FIB has added this adj for a route, it makes sense it |
| 489 | * may want to forward traffic sometime soon. Let's send a |
| 490 | * speculative ARP. just one. If we were to do periodically that |
| 491 | * wouldn't be bad either, but that's more code than i'm prepared to |
| 492 | * write at this time for relatively little reward. |
| 493 | */ |
| 494 | arp_nbr_probe (adj); |
| 495 | } |
| 496 | break; |
Neale Ranns | 1855b8e | 2018-07-11 10:31:26 -0700 | [diff] [blame] | 497 | case IP_LOOKUP_NEXT_BCAST: |
| 498 | adj_nbr_update_rewrite (ai, |
| 499 | ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 500 | ethernet_build_rewrite |
| 501 | (vnm, |
| 502 | sw_if_index, |
| 503 | VNET_LINK_IP4, |
| 504 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); |
| 505 | break; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 506 | case IP_LOOKUP_NEXT_MCAST: |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 507 | { |
| 508 | /* |
| 509 | * Construct a partial rewrite from the known ethernet mcast dest MAC |
| 510 | */ |
| 511 | u8 *rewrite; |
| 512 | u8 offset; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 513 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 514 | rewrite = ethernet_build_rewrite (vnm, |
| 515 | sw_if_index, |
| 516 | adj->ia_link, |
| 517 | ethernet_ip4_mcast_dst_addr ()); |
| 518 | offset = vec_len (rewrite) - 2; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 519 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 520 | /* |
| 521 | * Complete the remaining fields of the adj's rewrite to direct the |
| 522 | * complete of the rewrite at switch time by copying in the IP |
| 523 | * dst address's bytes. |
Neale Ranns | 889fe94 | 2017-06-01 05:43:19 -0400 | [diff] [blame] | 524 | * Ofset is 2 bytes into the MAC desintation address. |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 525 | */ |
Neale Ranns | 889fe94 | 2017-06-01 05:43:19 -0400 | [diff] [blame] | 526 | adj_mcast_update_rewrite (ai, rewrite, offset); |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 527 | |
Neale Ranns | 2e7fbcc | 2017-03-15 04:22:25 -0700 | [diff] [blame] | 528 | break; |
| 529 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 530 | case IP_LOOKUP_NEXT_DROP: |
| 531 | case IP_LOOKUP_NEXT_PUNT: |
| 532 | case IP_LOOKUP_NEXT_LOCAL: |
| 533 | case IP_LOOKUP_NEXT_REWRITE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 534 | case IP_LOOKUP_NEXT_MCAST_MIDCHAIN: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 535 | case IP_LOOKUP_NEXT_MIDCHAIN: |
| 536 | case IP_LOOKUP_NEXT_ICMP_ERROR: |
| 537 | case IP_LOOKUP_N_NEXT: |
| 538 | ASSERT (0); |
| 539 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 540 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 541 | } |
| 542 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 543 | static void |
Neale Ranns | 6b3a8ef | 2017-09-11 10:34:33 -0700 | [diff] [blame] | 544 | 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] | 545 | { |
| 546 | fib_prefix_t pfx = { |
| 547 | .fp_len = 32, |
| 548 | .fp_proto = FIB_PROTOCOL_IP4, |
| 549 | .fp_addr.ip4 = e->ip4_address, |
| 550 | }; |
| 551 | |
| 552 | e->fib_entry_index = |
| 553 | fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ, |
| 554 | FIB_ENTRY_FLAG_ATTACHED, |
| 555 | DPO_PROTO_IP4, &pfx.fp_addr, |
| 556 | e->sw_if_index, ~0, 1, NULL, |
| 557 | FIB_ROUTE_PATH_FLAG_NONE); |
| 558 | fib_table_lock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ); |
| 559 | } |
| 560 | |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 561 | static void |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 562 | arp_adj_fib_remove (ethernet_arp_ip4_entry_t * e, u32 fib_index) |
| 563 | { |
| 564 | if (FIB_NODE_INDEX_INVALID != e->fib_entry_index) |
| 565 | { |
| 566 | fib_prefix_t pfx = { |
| 567 | .fp_len = 32, |
| 568 | .fp_proto = FIB_PROTOCOL_IP4, |
| 569 | .fp_addr.ip4 = e->ip4_address, |
| 570 | }; |
| 571 | u32 fib_index; |
| 572 | |
| 573 | fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index); |
| 574 | |
| 575 | fib_table_entry_path_remove (fib_index, &pfx, |
| 576 | FIB_SOURCE_ADJ, |
| 577 | DPO_PROTO_IP4, |
| 578 | &pfx.fp_addr, |
| 579 | e->sw_if_index, ~0, 1, |
| 580 | FIB_ROUTE_PATH_FLAG_NONE); |
| 581 | fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | static ethernet_arp_ip4_entry_t * |
| 586 | force_reuse_arp_entry (void) |
| 587 | { |
| 588 | ethernet_arp_ip4_entry_t *e; |
| 589 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 590 | u32 count = 0; |
| 591 | u32 index = pool_next_index (am->ip4_entry_pool, am->arp_delete_rotor); |
| 592 | if (index == ~0) /* Try again from elt 0 */ |
| 593 | index = pool_next_index (am->ip4_entry_pool, index); |
| 594 | |
| 595 | /* Find a non-static random entry to free up for reuse */ |
| 596 | do |
| 597 | { |
| 598 | if ((count++ == 100) || (index == ~0)) |
| 599 | return NULL; /* give up after 100 entries */ |
| 600 | e = pool_elt_at_index (am->ip4_entry_pool, index); |
| 601 | am->arp_delete_rotor = index; |
| 602 | index = pool_next_index (am->ip4_entry_pool, index); |
| 603 | } |
| 604 | while (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC); |
| 605 | |
| 606 | /* Remove ARP entry from its interface and update fib */ |
| 607 | hash_unset |
| 608 | (am->ethernet_arp_by_sw_if_index[e->sw_if_index].arp_entries, |
| 609 | e->ip4_address.as_u32); |
| 610 | arp_adj_fib_remove |
| 611 | (e, ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index)); |
| 612 | adj_nbr_walk_nh4 (e->sw_if_index, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 613 | &e->ip4_address, arp_mk_incomplete_walk, e); |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 614 | return e; |
| 615 | } |
| 616 | |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 617 | static int |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 618 | vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 619 | vnet_arp_set_ip4_over_ethernet_rpc_args_t |
| 620 | * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 621 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 622 | ethernet_arp_ip4_entry_t *e = 0; |
| 623 | ethernet_arp_main_t *am = ðernet_arp_main; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 624 | ethernet_arp_ip4_over_ethernet_address_t *a = &args->a; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 625 | vlib_main_t *vm = vlib_get_main (); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 626 | int make_new_arp_cache_entry = 1; |
| 627 | uword *p; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 628 | pending_resolution_t *pr, *mc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 629 | ethernet_arp_interface_t *arp_int; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 630 | int is_static = args->is_static; |
| 631 | u32 sw_if_index = args->sw_if_index; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 632 | int is_no_fib_entry = args->is_no_fib_entry; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 633 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 634 | vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 635 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 636 | arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 637 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 638 | if (NULL != arp_int->arp_entries) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 639 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 640 | p = hash_get (arp_int->arp_entries, a->ip4.as_u32); |
| 641 | if (p) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 642 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 643 | e = pool_elt_at_index (am->ip4_entry_pool, p[0]); |
| 644 | |
| 645 | /* Refuse to over-write static arp. */ |
| 646 | if (!is_static && (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC)) |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 647 | { |
| 648 | /* if MAC address match, still check to send event */ |
| 649 | if (0 == memcmp (e->ethernet_address, |
| 650 | a->ethernet, sizeof (e->ethernet_address))) |
| 651 | goto check_customers; |
| 652 | return -2; |
| 653 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 654 | make_new_arp_cache_entry = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 655 | } |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 656 | } |
| 657 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 658 | if (make_new_arp_cache_entry) |
| 659 | { |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 660 | if (am->limit_arp_cache_size && |
| 661 | pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size) |
| 662 | { |
| 663 | e = force_reuse_arp_entry (); |
| 664 | if (NULL == e) |
| 665 | return -2; |
| 666 | } |
| 667 | else |
| 668 | pool_get (am->ip4_entry_pool, e); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 669 | |
| 670 | if (NULL == arp_int->arp_entries) |
John Lo | 4fed5b1 | 2018-05-22 03:35:06 -0400 | [diff] [blame] | 671 | arp_int->arp_entries = hash_create (0, sizeof (u32)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 672 | |
| 673 | hash_set (arp_int->arp_entries, a->ip4.as_u32, e - am->ip4_entry_pool); |
| 674 | |
| 675 | e->sw_if_index = sw_if_index; |
| 676 | e->ip4_address = a->ip4; |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 677 | e->fib_entry_index = FIB_NODE_INDEX_INVALID; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 678 | clib_memcpy_fast (e->ethernet_address, |
| 679 | a->ethernet, sizeof (e->ethernet_address)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 680 | |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 681 | if (!is_no_fib_entry) |
| 682 | { |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 683 | arp_adj_fib_add (e, |
| 684 | ip4_fib_table_get_index_for_sw_if_index |
| 685 | (e->sw_if_index)); |
Neale Ranns | 2a3ea49 | 2017-04-19 05:24:40 -0700 | [diff] [blame] | 686 | } |
| 687 | else |
| 688 | { |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 689 | e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY; |
| 690 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 691 | } |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 692 | else |
| 693 | { |
| 694 | /* |
| 695 | * prevent a DoS attack from the data-plane that |
| 696 | * spams us with no-op updates to the MAC address |
| 697 | */ |
| 698 | if (0 == memcmp (e->ethernet_address, |
| 699 | a->ethernet, sizeof (e->ethernet_address))) |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 700 | { |
| 701 | e->time_last_updated = vlib_time_now (vm); |
| 702 | goto check_customers; |
| 703 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 704 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 705 | /* Update ethernet address. */ |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 706 | clib_memcpy_fast (e->ethernet_address, a->ethernet, |
| 707 | sizeof (e->ethernet_address)); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 708 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 709 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 710 | /* Update time stamp and flags. */ |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 711 | e->time_last_updated = vlib_time_now (vm); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 712 | if (is_static) |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 713 | { |
| 714 | e->flags &= ~ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC; |
| 715 | e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC; |
| 716 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 717 | else |
Jon Loeliger | 1f6e928 | 2018-05-17 15:55:00 -0500 | [diff] [blame] | 718 | { |
| 719 | e->flags &= ~ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC; |
| 720 | e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC; |
| 721 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 722 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 723 | 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] | 724 | |
Dave Barach | 59b2565 | 2017-09-10 15:04:27 -0400 | [diff] [blame] | 725 | check_customers: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 726 | /* Customer(s) waiting for this address to be resolved? */ |
| 727 | p = hash_get (am->pending_resolutions_by_address, a->ip4.as_u32); |
| 728 | if (p) |
| 729 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 730 | u32 next_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 731 | next_index = p[0]; |
| 732 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 733 | while (next_index != (u32) ~ 0) |
| 734 | { |
| 735 | pr = pool_elt_at_index (am->pending_resolutions, next_index); |
| 736 | vlib_process_signal_event (vm, pr->node_index, |
| 737 | pr->type_opaque, pr->data); |
| 738 | next_index = pr->next_index; |
| 739 | pool_put (am->pending_resolutions, pr); |
| 740 | } |
| 741 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 742 | hash_unset (am->pending_resolutions_by_address, a->ip4.as_u32); |
| 743 | } |
| 744 | |
| 745 | /* Customer(s) requesting ARP event for this address? */ |
| 746 | p = hash_get (am->mac_changes_by_address, a->ip4.as_u32); |
| 747 | if (p) |
| 748 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 749 | u32 next_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 750 | next_index = p[0]; |
| 751 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 752 | while (next_index != (u32) ~ 0) |
| 753 | { |
| 754 | int (*fp) (u32, u8 *, u32, u32); |
| 755 | int rv = 1; |
| 756 | mc = pool_elt_at_index (am->mac_changes, next_index); |
| 757 | fp = mc->data_callback; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 758 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 759 | /* Call the user's data callback, return 1 to suppress dup events */ |
| 760 | if (fp) |
| 761 | rv = (*fp) (mc->data, a->ethernet, sw_if_index, 0); |
| 762 | |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 763 | /* |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 764 | * Signal the resolver process, as long as the user |
| 765 | * says they want to be notified |
| 766 | */ |
| 767 | if (rv == 0) |
| 768 | vlib_process_signal_event (vm, mc->node_index, |
| 769 | mc->type_opaque, mc->data); |
| 770 | next_index = mc->next_index; |
| 771 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | return 0; |
| 775 | } |
| 776 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 777 | void |
| 778 | vnet_register_ip4_arp_resolution_event (vnet_main_t * vnm, |
| 779 | void *address_arg, |
| 780 | uword node_index, |
| 781 | uword type_opaque, uword data) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 782 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 783 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 784 | ip4_address_t *address = address_arg; |
| 785 | uword *p; |
| 786 | pending_resolution_t *pr; |
| 787 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 788 | pool_get (am->pending_resolutions, pr); |
| 789 | |
| 790 | pr->next_index = ~0; |
| 791 | pr->node_index = node_index; |
| 792 | pr->type_opaque = type_opaque; |
| 793 | pr->data = data; |
| 794 | pr->data_callback = 0; |
| 795 | |
| 796 | p = hash_get (am->pending_resolutions_by_address, address->as_u32); |
| 797 | if (p) |
| 798 | { |
| 799 | /* Insert new resolution at the head of the list */ |
| 800 | pr->next_index = p[0]; |
| 801 | hash_unset (am->pending_resolutions_by_address, address->as_u32); |
| 802 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 803 | |
| 804 | hash_set (am->pending_resolutions_by_address, address->as_u32, |
| 805 | pr - am->pending_resolutions); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 808 | int |
| 809 | vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm, |
| 810 | void *data_callback, |
| 811 | u32 pid, |
| 812 | void *address_arg, |
| 813 | uword node_index, |
| 814 | uword type_opaque, uword data, int is_add) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 815 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 816 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 817 | ip4_address_t *address = address_arg; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 818 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 819 | /* Try to find an existing entry */ |
| 820 | u32 *first = (u32 *) hash_get (am->mac_changes_by_address, address->as_u32); |
| 821 | u32 *p = first; |
| 822 | pending_resolution_t *mc; |
| 823 | while (p && *p != ~0) |
| 824 | { |
| 825 | mc = pool_elt_at_index (am->mac_changes, *p); |
| 826 | if (mc->node_index == node_index && mc->type_opaque == type_opaque |
| 827 | && mc->pid == pid) |
| 828 | break; |
| 829 | p = &mc->next_index; |
| 830 | } |
| 831 | |
| 832 | int found = p && *p != ~0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 833 | if (is_add) |
| 834 | { |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 835 | if (found) |
| 836 | return VNET_API_ERROR_ENTRY_ALREADY_EXISTS; |
| 837 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 838 | pool_get (am->mac_changes, mc); |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 839 | *mc = (pending_resolution_t) |
| 840 | { |
| 841 | .next_index = ~0,.node_index = node_index,.type_opaque = |
| 842 | type_opaque,.data = data,.data_callback = data_callback,.pid = |
| 843 | pid,}; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 844 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 845 | /* Insert new resolution at the end of the list */ |
| 846 | u32 new_idx = mc - am->mac_changes; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 847 | if (p) |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 848 | p[0] = new_idx; |
| 849 | else |
| 850 | hash_set (am->mac_changes_by_address, address->as_u32, new_idx); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 851 | } |
| 852 | else |
| 853 | { |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 854 | if (!found) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 855 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 856 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 857 | /* Clients may need to clean up pool entries, too */ |
| 858 | void (*fp) (u32, u8 *) = data_callback; |
| 859 | if (fp) |
| 860 | (*fp) (mc->data, 0 /* no new mac addrs */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 861 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 862 | /* Remove the entry from the list and delete the entry */ |
| 863 | *p = mc->next_index; |
| 864 | pool_put (am->mac_changes, mc); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 865 | |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 866 | /* Remove from hash if we deleted the last entry */ |
| 867 | if (*p == ~0 && p == first) |
| 868 | hash_unset (am->mac_changes_by_address, address->as_u32); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 869 | } |
Eyal Bari | 8db1de8 | 2017-03-31 02:15:17 +0300 | [diff] [blame] | 870 | return 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | /* 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] | 874 | typedef enum |
| 875 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 876 | ARP_INPUT_NEXT_DROP, |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 877 | ARP_INPUT_NEXT_REPLY_TX, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 878 | ARP_INPUT_N_NEXT, |
| 879 | } arp_input_next_t; |
| 880 | |
| 881 | #define foreach_ethernet_arp_error \ |
| 882 | _ (replies_sent, "ARP replies sent") \ |
| 883 | _ (l2_type_not_ethernet, "L2 type not ethernet") \ |
| 884 | _ (l3_type_not_ip4, "L3 type not IP4") \ |
| 885 | _ (l3_src_address_not_local, "IP4 source address not local to subnet") \ |
| 886 | _ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \ |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 887 | _ (l3_dst_address_unset, "IP4 destination address is unset") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 888 | _ (l3_src_address_is_local, "IP4 source address matches local interface") \ |
| 889 | _ (l3_src_address_learned, "ARP request IP4 source address learned") \ |
| 890 | _ (replies_received, "ARP replies received") \ |
| 891 | _ (opcode_not_request, "ARP opcode not request") \ |
| 892 | _ (proxy_arp_replies_sent, "Proxy ARP replies sent") \ |
| 893 | _ (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] | 894 | _ (gratuitous_arp, "ARP probe or announcement dropped") \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 895 | _ (interface_no_table, "Interface is not mapped to an IP table") \ |
Neale Ranns | d96bad8 | 2017-03-08 01:12:54 -0800 | [diff] [blame] | 896 | _ (interface_not_ip_enabled, "Interface is not IP enabled") \ |
Neale Ranns | 7425f92 | 2019-01-23 00:36:16 -0800 | [diff] [blame] | 897 | _ (unnumbered_mismatch, "RX interface is unnumbered to different subnet") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 898 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 899 | typedef enum |
| 900 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 901 | #define _(sym,string) ETHERNET_ARP_ERROR_##sym, |
| 902 | foreach_ethernet_arp_error |
| 903 | #undef _ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 904 | ETHERNET_ARP_N_ERROR, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 905 | } ethernet_arp_input_error_t; |
| 906 | |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 907 | static int |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 908 | arp_unnumbered (vlib_buffer_t * p0, |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 909 | u32 input_sw_if_index, u32 conn_sw_if_index) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 910 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 911 | vnet_main_t *vnm = vnet_get_main (); |
| 912 | vnet_interface_main_t *vim = &vnm->interface_main; |
| 913 | vnet_sw_interface_t *si; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 914 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 915 | /* verify that the input interface is unnumbered to the connected. |
| 916 | * the connected interface is the interface on which the subnet is |
| 917 | * configured */ |
| 918 | si = &vim->sw_interfaces[input_sw_if_index]; |
| 919 | |
| 920 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED && |
| 921 | (si->unnumbered_sw_if_index == conn_sw_if_index))) |
| 922 | { |
| 923 | /* the input interface is not unnumbered to the interface on which |
| 924 | * the sub-net is configured that covers the ARP request. |
| 925 | * So this is not the case for unnumbered.. */ |
| 926 | return 0; |
| 927 | } |
| 928 | |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 929 | return !0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 930 | } |
| 931 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 932 | static u32 |
| 933 | arp_learn (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 934 | ethernet_arp_main_t * am, u32 sw_if_index, |
| 935 | const ethernet_arp_ip4_over_ethernet_address_t * addr) |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 936 | { |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 937 | vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, addr, 0, 0); |
| 938 | return (ETHERNET_ARP_ERROR_l3_src_address_learned); |
| 939 | } |
| 940 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 941 | static uword |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 942 | 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] | 943 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 944 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 945 | vnet_main_t *vnm = vnet_get_main (); |
| 946 | ip4_main_t *im4 = &ip4_main; |
| 947 | u32 n_left_from, next_index, *from, *to_next; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 948 | u32 n_replies_sent = 0, n_proxy_arp_replies_sent = 0; |
| 949 | |
| 950 | from = vlib_frame_vector_args (frame); |
| 951 | n_left_from = frame->n_vectors; |
| 952 | next_index = node->cached_next_index; |
| 953 | |
| 954 | if (node->flags & VLIB_NODE_FLAG_TRACE) |
| 955 | vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, |
| 956 | /* stride */ 1, |
| 957 | sizeof (ethernet_arp_input_trace_t)); |
| 958 | |
| 959 | while (n_left_from > 0) |
| 960 | { |
| 961 | u32 n_left_to_next; |
| 962 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 963 | 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] | 964 | |
| 965 | while (n_left_from > 0 && n_left_to_next > 0) |
| 966 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 967 | vlib_buffer_t *p0; |
| 968 | vnet_hw_interface_t *hw_if0; |
| 969 | ethernet_arp_header_t *arp0; |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 970 | ethernet_header_t *eth_rx, *eth_tx; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 971 | const ip4_address_t *if_addr0; |
| 972 | ip4_address_t proxy_src; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 973 | 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] | 974 | u8 is_request0, dst_is_local0, is_unnum0, is_vrrp_reply0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 975 | ethernet_proxy_arp_t *pa; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 976 | fib_node_index_t dst_fei, src_fei; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 977 | const fib_prefix_t *pfx0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 978 | fib_entry_flag_t src_flags, dst_flags; |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 979 | u8 *rewrite0, rewrite0_len; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 980 | |
| 981 | pi0 = from[0]; |
| 982 | to_next[0] = pi0; |
| 983 | from += 1; |
| 984 | to_next += 1; |
| 985 | n_left_from -= 1; |
| 986 | n_left_to_next -= 1; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 987 | pa = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 988 | |
| 989 | p0 = vlib_get_buffer (vm, pi0); |
| 990 | arp0 = vlib_buffer_get_current (p0); |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 991 | /* Fill in ethernet header. */ |
| 992 | eth_rx = ethernet_buffer_get_header (p0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 993 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 994 | is_request0 = arp0->opcode |
| 995 | == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 996 | |
| 997 | error0 = ETHERNET_ARP_ERROR_replies_sent; |
| 998 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 999 | error0 = |
| 1000 | (arp0->l2_type != |
| 1001 | clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) ? |
| 1002 | ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0); |
| 1003 | error0 = |
| 1004 | (arp0->l3_type != |
| 1005 | clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ? |
| 1006 | ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0); |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1007 | error0 = |
| 1008 | (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ? |
| 1009 | ETHERNET_ARP_ERROR_l3_dst_address_unset : error0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1010 | |
| 1011 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 1012 | |
Neale Ranns | d96bad8 | 2017-03-08 01:12:54 -0800 | [diff] [blame] | 1013 | /* not playing the ARP game if the interface is not IPv4 enabled */ |
| 1014 | error0 = |
| 1015 | (im4->ip_enabled_by_sw_if_index[sw_if_index0] == 0 ? |
| 1016 | ETHERNET_ARP_ERROR_interface_not_ip_enabled : error0); |
| 1017 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1018 | if (error0) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1019 | goto drop2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1020 | |
| 1021 | /* Check that IP address is local and matches incoming interface. */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1022 | fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); |
| 1023 | if (~0 == fib_index0) |
| 1024 | { |
| 1025 | error0 = ETHERNET_ARP_ERROR_interface_no_table; |
| 1026 | goto drop2; |
| 1027 | |
| 1028 | } |
| 1029 | dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), |
| 1030 | &arp0->ip4_over_ethernet[1].ip4, |
| 1031 | 32); |
Matus Fabian | dccbee3 | 2017-01-31 22:20:30 -0800 | [diff] [blame] | 1032 | dst_flags = fib_entry_get_flags (dst_fei); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1033 | |
Matus Fabian | dccbee3 | 2017-01-31 22:20:30 -0800 | [diff] [blame] | 1034 | conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1035 | |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1036 | /* Honor unnumbered interface, if any */ |
| 1037 | is_unnum0 = sw_if_index0 != conn_sw_if_index0; |
| 1038 | |
| 1039 | { |
| 1040 | /* |
| 1041 | * we're looking for FIB entries that indicate the source |
| 1042 | * is attached. There may be more specific non-attached |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1043 | * routes that match the source, but these do not influence |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1044 | * whether we respond to an ARP request, i.e. they do not |
| 1045 | * influence whether we are the correct way for the sender |
| 1046 | * to reach us, they only affect how we reach the sender. |
| 1047 | */ |
| 1048 | fib_entry_t *src_fib_entry; |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1049 | const fib_prefix_t *pfx; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1050 | fib_entry_src_t *src; |
| 1051 | fib_source_t source; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1052 | int attached; |
| 1053 | int mask; |
| 1054 | |
| 1055 | mask = 32; |
| 1056 | attached = 0; |
| 1057 | |
| 1058 | do |
| 1059 | { |
| 1060 | src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), |
| 1061 | &arp0-> |
| 1062 | ip4_over_ethernet[0].ip4, |
| 1063 | mask); |
| 1064 | src_fib_entry = fib_entry_get (src_fei); |
| 1065 | |
| 1066 | /* |
| 1067 | * It's possible that the source that provides the |
| 1068 | * flags we need, or the flags we must not have, |
| 1069 | * is not the best source, so check then all. |
| 1070 | */ |
| 1071 | /* *INDENT-OFF* */ |
| 1072 | FOR_EACH_SRC_ADDED(src_fib_entry, src, source, |
| 1073 | ({ |
| 1074 | src_flags = fib_entry_get_flags_for_source (src_fei, source); |
| 1075 | |
| 1076 | /* Reject requests/replies with our local interface |
| 1077 | address. */ |
| 1078 | if (FIB_ENTRY_FLAG_LOCAL & src_flags) |
| 1079 | { |
| 1080 | error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local; |
Neale Ranns | 24b170a | 2017-08-15 05:33:11 -0700 | [diff] [blame] | 1081 | /* |
| 1082 | * When VPP has an interface whose address is also |
| 1083 | * applied to a TAP interface on the host, then VPP's |
| 1084 | * TAP interface will be unnumbered to the 'real' |
| 1085 | * interface and do proxy ARP from the host. |
| 1086 | * The curious aspect of this setup is that ARP requests |
| 1087 | * from the host will come from the VPP's own address. |
| 1088 | * So don't drop immediately here, instead go see if this |
| 1089 | * is a proxy ARP case. |
| 1090 | */ |
| 1091 | goto drop1; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1092 | } |
| 1093 | /* A Source must also be local to subnet of matching |
| 1094 | * interface address. */ |
| 1095 | if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) || |
| 1096 | (FIB_ENTRY_FLAG_CONNECTED & src_flags)) |
| 1097 | { |
| 1098 | attached = 1; |
| 1099 | break; |
| 1100 | } |
| 1101 | /* |
| 1102 | * else |
| 1103 | * The packet was sent from an address that is not |
| 1104 | * connected nor attached i.e. it is not from an |
| 1105 | * address that is covered by a link's sub-net, |
| 1106 | * nor is it a already learned host resp. |
| 1107 | */ |
| 1108 | })); |
| 1109 | /* *INDENT-ON* */ |
| 1110 | |
| 1111 | /* |
| 1112 | * shorter mask lookup for the next iteration. |
| 1113 | */ |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1114 | pfx = fib_entry_get_prefix (src_fei); |
| 1115 | mask = pfx->fp_len - 1; |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1116 | |
| 1117 | /* |
| 1118 | * continue until we hit the default route or we find |
| 1119 | * the attached we are looking for. The most likely |
| 1120 | * outcome is we find the attached with the first source |
| 1121 | * on the first lookup. |
| 1122 | */ |
| 1123 | } |
| 1124 | while (!attached && |
| 1125 | !fib_entry_is_sourced (src_fei, FIB_SOURCE_DEFAULT_ROUTE)); |
| 1126 | |
| 1127 | if (!attached) |
| 1128 | { |
| 1129 | /* |
| 1130 | * the matching route is a not attached, i.e. it was |
| 1131 | * added as a result of routing, rather than interface/ARP |
| 1132 | * configuration. If the matching route is not a host route |
| 1133 | * (i.e. a /32) |
| 1134 | */ |
| 1135 | error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local; |
| 1136 | goto drop2; |
| 1137 | } |
| 1138 | } |
| 1139 | |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1140 | if (fib_entry_is_sourced (dst_fei, FIB_SOURCE_ADJ)) |
| 1141 | { |
| 1142 | /* |
| 1143 | * We matched an adj-fib on ths source subnet (a /32 previously |
| 1144 | * added as a result of ARP). If this request is a gratuitous |
| 1145 | * ARP, then learn from it. |
| 1146 | * The check for matching an adj-fib, is to prevent hosts |
| 1147 | * from spamming us with gratuitous ARPS that might otherwise |
| 1148 | * blow our ARP cache |
| 1149 | */ |
| 1150 | if (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 1151 | arp0->ip4_over_ethernet[1].ip4.as_u32) |
| 1152 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1153 | &arp0->ip4_over_ethernet[0]); |
| 1154 | goto drop2; |
| 1155 | } |
| 1156 | else if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1157 | { |
| 1158 | error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local; |
| 1159 | goto drop1; |
| 1160 | } |
| 1161 | |
Neale Ranns | 797235a | 2017-01-09 14:33:38 +0100 | [diff] [blame] | 1162 | if (sw_if_index0 != fib_entry_get_resolving_interface (src_fei)) |
| 1163 | { |
| 1164 | /* |
| 1165 | * The interface the ARP was received on is not the interface |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 1166 | * on which the covering prefix is configured. Maybe this is a |
| 1167 | * case for unnumbered. |
Neale Ranns | 797235a | 2017-01-09 14:33:38 +0100 | [diff] [blame] | 1168 | */ |
| 1169 | is_unnum0 = 1; |
| 1170 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1171 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1172 | dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags); |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1173 | pfx0 = fib_entry_get_prefix (dst_fei); |
| 1174 | if_addr0 = &pfx0->fp_addr.ip4; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1175 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 1176 | is_vrrp_reply0 = |
| 1177 | ((arp0->opcode == |
| 1178 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) |
| 1179 | && |
| 1180 | (!memcmp |
| 1181 | (arp0->ip4_over_ethernet[0].ethernet, vrrp_prefix, |
| 1182 | sizeof (vrrp_prefix)))); |
| 1183 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1184 | /* Trash ARP packets whose ARP-level source addresses do not |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 1185 | match their L2-frame-level source addresses, unless it's |
| 1186 | a reply from a VRRP virtual router */ |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1187 | if (memcmp |
| 1188 | (eth_rx->src_address, arp0->ip4_over_ethernet[0].ethernet, |
| 1189 | sizeof (eth_rx->src_address)) && !is_vrrp_reply0) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1190 | { |
| 1191 | error0 = ETHERNET_ARP_ERROR_l2_address_mismatch; |
| 1192 | goto drop2; |
| 1193 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1194 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 1195 | /* Learn or update sender's mapping only for replies to addresses |
| 1196 | * that are local to the subnet */ |
| 1197 | if (arp0->opcode == |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1198 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1199 | { |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1200 | if (dst_is_local0) |
| 1201 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1202 | &arp0->ip4_over_ethernet[0]); |
| 1203 | else |
| 1204 | /* a reply for a non-local destination could be a GARP. |
| 1205 | * GARPs for hosts we know were handled above, so this one |
| 1206 | * we drop */ |
| 1207 | error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local; |
| 1208 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1209 | goto drop1; |
| 1210 | } |
zhaoqingling | b4c42cd | 2017-12-23 15:20:59 +0800 | [diff] [blame] | 1211 | else if (arp0->opcode == |
| 1212 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) && |
| 1213 | (dst_is_local0 == 0)) |
| 1214 | { |
| 1215 | goto drop1; |
| 1216 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1217 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1218 | send_reply: |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1219 | /* Send a reply. |
| 1220 | An adjacency to the sender is not always present, |
| 1221 | so we use the interface to build us a rewrite string |
| 1222 | which will contain all the necessary tags. */ |
| 1223 | rewrite0 = ethernet_build_rewrite (vnm, sw_if_index0, |
| 1224 | VNET_LINK_ARP, |
| 1225 | eth_rx->src_address); |
| 1226 | rewrite0_len = vec_len (rewrite0); |
| 1227 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1228 | /* Figure out how much to rewind current data from adjacency. */ |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1229 | vlib_buffer_advance (p0, -rewrite0_len); |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1230 | eth_tx = vlib_buffer_get_current (p0); |
| 1231 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1232 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 1233 | hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); |
| 1234 | |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 1235 | /* Send reply back through input interface */ |
| 1236 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 1237 | next0 = ARP_INPUT_NEXT_REPLY_TX; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1238 | |
| 1239 | arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply); |
| 1240 | |
| 1241 | arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0]; |
| 1242 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1243 | clib_memcpy_fast (arp0->ip4_over_ethernet[0].ethernet, |
| 1244 | hw_if0->hw_address, 6); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1245 | clib_mem_unaligned (&arp0->ip4_over_ethernet[0].ip4.data_u32, u32) = |
| 1246 | if_addr0->data_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1247 | |
| 1248 | /* Hardware must be ethernet-like. */ |
| 1249 | ASSERT (vec_len (hw_if0->hw_address) == 6); |
| 1250 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1251 | /* the rx nd tx ethernet headers wil overlap in the case |
| 1252 | * when we received a tagged VLAN=0 packet, but we are sending |
| 1253 | * back untagged */ |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1254 | clib_memcpy_fast (eth_tx, rewrite0, vec_len (rewrite0)); |
Neale Ranns | a3a3a9d | 2017-08-08 12:35:11 -0700 | [diff] [blame] | 1255 | vec_free (rewrite0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1256 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1257 | if (NULL == pa) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1258 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1259 | if (is_unnum0) |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 1260 | { |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1261 | if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0)) |
Neale Ranns | 7425f92 | 2019-01-23 00:36:16 -0800 | [diff] [blame] | 1262 | { |
| 1263 | error0 = ETHERNET_ARP_ERROR_unnumbered_mismatch; |
| 1264 | goto drop2; |
| 1265 | } |
Neale Ranns | 436d06b | 2016-11-30 07:41:53 -0800 | [diff] [blame] | 1266 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1267 | } |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 1268 | |
Neale Ranns | 24b170a | 2017-08-15 05:33:11 -0700 | [diff] [blame] | 1269 | /* We are going to reply to this request, so, in the absence of |
| 1270 | errors, learn the sender */ |
| 1271 | if (!error0) |
| 1272 | error0 = arp_learn (vnm, am, sw_if_index0, |
| 1273 | &arp0->ip4_over_ethernet[1]); |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 1274 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1275 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, |
| 1276 | n_left_to_next, pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1277 | |
| 1278 | n_replies_sent += 1; |
| 1279 | continue; |
| 1280 | |
| 1281 | drop1: |
Neale Ranns | 59ae61e | 2018-06-07 18:09:49 -0700 | [diff] [blame] | 1282 | if (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 1283 | arp0->ip4_over_ethernet[1].ip4.as_u32) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1284 | { |
| 1285 | error0 = ETHERNET_ARP_ERROR_gratuitous_arp; |
| 1286 | goto drop2; |
| 1287 | } |
| 1288 | /* See if proxy arp is configured for the address */ |
| 1289 | if (is_request0) |
| 1290 | { |
| 1291 | vnet_sw_interface_t *si; |
| 1292 | u32 this_addr = clib_net_to_host_u32 |
| 1293 | (arp0->ip4_over_ethernet[1].ip4.as_u32); |
| 1294 | u32 fib_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 | si = vnet_get_sw_interface (vnm, sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1297 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1298 | if (!(si->flags & VNET_SW_INTERFACE_FLAG_PROXY_ARP)) |
| 1299 | goto drop2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1300 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1301 | fib_index0 = vec_elt (im4->fib_index_by_sw_if_index, |
| 1302 | sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1303 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1304 | vec_foreach (pa, am->proxy_arps) |
| 1305 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 1306 | u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr.as_u32); |
| 1307 | 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] | 1308 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1309 | /* an ARP request hit in the proxy-arp table? */ |
| 1310 | if ((this_addr >= lo_addr && this_addr <= hi_addr) && |
| 1311 | (fib_index0 == pa->fib_index)) |
| 1312 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1313 | proxy_src.as_u32 = |
| 1314 | arp0->ip4_over_ethernet[1].ip4.data_u32; |
| 1315 | |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 1316 | /* |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 1317 | * change the interface address to the proxied |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1318 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1319 | if_addr0 = &proxy_src; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1320 | is_unnum0 = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1321 | n_proxy_arp_replies_sent++; |
| 1322 | goto send_reply; |
| 1323 | } |
| 1324 | } |
| 1325 | } |
| 1326 | |
| 1327 | drop2: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1328 | |
| 1329 | next0 = ARP_INPUT_NEXT_DROP; |
| 1330 | p0->error = node->errors[error0]; |
| 1331 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1332 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, |
| 1333 | n_left_to_next, pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
| 1336 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 1337 | } |
| 1338 | |
| 1339 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1340 | ETHERNET_ARP_ERROR_replies_sent, |
| 1341 | n_replies_sent - n_proxy_arp_replies_sent); |
| 1342 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1343 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1344 | ETHERNET_ARP_ERROR_proxy_arp_replies_sent, |
| 1345 | n_proxy_arp_replies_sent); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1346 | return frame->n_vectors; |
| 1347 | } |
| 1348 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1349 | static char *ethernet_arp_error_strings[] = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1350 | #define _(sym,string) string, |
| 1351 | foreach_ethernet_arp_error |
| 1352 | #undef _ |
| 1353 | }; |
| 1354 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1355 | /* *INDENT-OFF* */ |
| 1356 | VLIB_REGISTER_NODE (arp_input_node, static) = |
| 1357 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1358 | .function = arp_input, |
| 1359 | .name = "arp-input", |
| 1360 | .vector_size = sizeof (u32), |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1361 | .n_errors = ETHERNET_ARP_N_ERROR, |
| 1362 | .error_strings = ethernet_arp_error_strings, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1363 | .n_next_nodes = ARP_INPUT_N_NEXT, |
| 1364 | .next_nodes = { |
| 1365 | [ARP_INPUT_NEXT_DROP] = "error-drop", |
John Lo | d1f5d04 | 2016-04-12 18:20:39 -0400 | [diff] [blame] | 1366 | [ARP_INPUT_NEXT_REPLY_TX] = "interface-output", |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1367 | }, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1368 | .format_buffer = format_ethernet_arp_header, |
| 1369 | .format_trace = format_ethernet_arp_input_trace, |
| 1370 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1371 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1372 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1373 | static int |
| 1374 | ip4_arp_entry_sort (void *a1, void *a2) |
| 1375 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1376 | ethernet_arp_ip4_entry_t *e1 = a1; |
| 1377 | ethernet_arp_ip4_entry_t *e2 = a2; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1378 | |
| 1379 | int cmp; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1380 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1381 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1382 | 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] | 1383 | if (!cmp) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1384 | cmp = ip4_address_compare (&e1->ip4_address, &e2->ip4_address); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1385 | return cmp; |
| 1386 | } |
| 1387 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1388 | ethernet_arp_ip4_entry_t * |
John Lo | 7f358b3 | 2018-04-28 01:19:24 -0400 | [diff] [blame] | 1389 | ip4_neighbors_pool (void) |
| 1390 | { |
| 1391 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1392 | return am->ip4_entry_pool; |
| 1393 | } |
| 1394 | |
| 1395 | ethernet_arp_ip4_entry_t * |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1396 | ip4_neighbor_entries (u32 sw_if_index) |
| 1397 | { |
| 1398 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1399 | ethernet_arp_ip4_entry_t *n, *ns = 0; |
| 1400 | |
| 1401 | /* *INDENT-OFF* */ |
| 1402 | pool_foreach (n, am->ip4_entry_pool, ({ |
| 1403 | if (sw_if_index != ~0 && n->sw_if_index != sw_if_index) |
| 1404 | continue; |
| 1405 | vec_add1 (ns, n[0]); |
| 1406 | })); |
| 1407 | /* *INDENT-ON* */ |
| 1408 | |
| 1409 | if (ns) |
| 1410 | vec_sort_with_function (ns, ip4_arp_entry_sort); |
| 1411 | return ns; |
| 1412 | } |
| 1413 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1414 | static clib_error_t * |
| 1415 | show_ip4_arp (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1416 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1417 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1418 | vnet_main_t *vnm = vnet_get_main (); |
| 1419 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1420 | ethernet_arp_ip4_entry_t *e, *es; |
| 1421 | ethernet_proxy_arp_t *pa; |
| 1422 | clib_error_t *error = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1423 | u32 sw_if_index; |
| 1424 | |
| 1425 | /* Filter entries by interface if given. */ |
| 1426 | sw_if_index = ~0; |
| 1427 | (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index); |
| 1428 | |
Pavel Kotucek | 3e046ea | 2016-12-05 08:27:37 +0100 | [diff] [blame] | 1429 | es = ip4_neighbor_entries (sw_if_index); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1430 | if (es) |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1431 | { |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1432 | 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] | 1433 | vec_foreach (e, es) |
| 1434 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1435 | vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, e); |
Keith Wiles | cb46684 | 2016-02-11 19:21:10 -0600 | [diff] [blame] | 1436 | } |
| 1437 | vec_free (es); |
| 1438 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1439 | |
| 1440 | if (vec_len (am->proxy_arps)) |
| 1441 | { |
| 1442 | vlib_cli_output (vm, "Proxy arps enabled for:"); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1443 | vec_foreach (pa, am->proxy_arps) |
| 1444 | { |
| 1445 | vlib_cli_output (vm, "Fib_index %d %U - %U ", |
| 1446 | pa->fib_index, |
| 1447 | format_ip4_address, &pa->lo_addr, |
| 1448 | format_ip4_address, &pa->hi_addr); |
| 1449 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1450 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1451 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1452 | return error; |
| 1453 | } |
| 1454 | |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 1455 | /*? |
| 1456 | * Display all the IPv4 ARP entries. |
| 1457 | * |
| 1458 | * @cliexpar |
| 1459 | * Example of how to display the IPv4 ARP table: |
| 1460 | * @cliexstart{show ip arp} |
| 1461 | * Time FIB IP4 Flags Ethernet Interface |
| 1462 | * 346.3028 0 6.1.1.3 de:ad:be:ef:ba:be GigabitEthernet2/0/0 |
| 1463 | * 3077.4271 0 6.1.1.4 S de:ad:be:ef:ff:ff GigabitEthernet2/0/0 |
| 1464 | * 2998.6409 1 6.2.2.3 de:ad:be:ef:00:01 GigabitEthernet2/0/0 |
| 1465 | * Proxy arps enabled for: |
| 1466 | * Fib_index 0 6.0.0.1 - 6.0.0.11 |
| 1467 | * @cliexend |
| 1468 | ?*/ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1469 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1470 | VLIB_CLI_COMMAND (show_ip4_arp_command, static) = { |
| 1471 | .path = "show ip arp", |
| 1472 | .function = show_ip4_arp, |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 1473 | .short_help = "show ip arp", |
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 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1476 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1477 | typedef struct |
| 1478 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1479 | pg_edit_t l2_type, l3_type; |
| 1480 | pg_edit_t n_l2_address_bytes, n_l3_address_bytes; |
| 1481 | pg_edit_t opcode; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1482 | struct |
| 1483 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1484 | pg_edit_t ethernet; |
| 1485 | pg_edit_t ip4; |
| 1486 | } ip4_over_ethernet[2]; |
| 1487 | } pg_ethernet_arp_header_t; |
| 1488 | |
| 1489 | static inline void |
| 1490 | pg_ethernet_arp_header_init (pg_ethernet_arp_header_t * p) |
| 1491 | { |
| 1492 | /* Initialize fields that are not bit fields in the IP header. */ |
| 1493 | #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] | 1494 | _(l2_type); |
| 1495 | _(l3_type); |
| 1496 | _(n_l2_address_bytes); |
| 1497 | _(n_l3_address_bytes); |
| 1498 | _(opcode); |
| 1499 | _(ip4_over_ethernet[0].ethernet); |
| 1500 | _(ip4_over_ethernet[0].ip4); |
| 1501 | _(ip4_over_ethernet[1].ethernet); |
| 1502 | _(ip4_over_ethernet[1].ip4); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1503 | #undef _ |
| 1504 | } |
| 1505 | |
| 1506 | uword |
| 1507 | unformat_pg_arp_header (unformat_input_t * input, va_list * args) |
| 1508 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1509 | pg_stream_t *s = va_arg (*args, pg_stream_t *); |
| 1510 | pg_ethernet_arp_header_t *p; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1511 | u32 group_index; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1512 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1513 | p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ethernet_arp_header_t), |
| 1514 | &group_index); |
| 1515 | pg_ethernet_arp_header_init (p); |
| 1516 | |
| 1517 | /* Defaults. */ |
| 1518 | pg_edit_set_fixed (&p->l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet); |
| 1519 | pg_edit_set_fixed (&p->l3_type, ETHERNET_TYPE_IP4); |
| 1520 | pg_edit_set_fixed (&p->n_l2_address_bytes, 6); |
| 1521 | pg_edit_set_fixed (&p->n_l3_address_bytes, 4); |
| 1522 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1523 | if (!unformat (input, "%U: %U/%U -> %U/%U", |
| 1524 | unformat_pg_edit, |
| 1525 | unformat_ethernet_arp_opcode_net_byte_order, &p->opcode, |
| 1526 | unformat_pg_edit, |
| 1527 | unformat_ethernet_address, &p->ip4_over_ethernet[0].ethernet, |
| 1528 | unformat_pg_edit, |
| 1529 | unformat_ip4_address, &p->ip4_over_ethernet[0].ip4, |
| 1530 | unformat_pg_edit, |
| 1531 | unformat_ethernet_address, &p->ip4_over_ethernet[1].ethernet, |
| 1532 | unformat_pg_edit, |
| 1533 | unformat_ip4_address, &p->ip4_over_ethernet[1].ip4)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1534 | { |
| 1535 | /* Free up any edits we may have added. */ |
| 1536 | pg_free_edit_group (s); |
| 1537 | return 0; |
| 1538 | } |
| 1539 | return 1; |
| 1540 | } |
| 1541 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1542 | clib_error_t * |
| 1543 | ip4_set_arp_limit (u32 arp_limit) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1544 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1545 | ethernet_arp_main_t *am = ðernet_arp_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1546 | |
| 1547 | am->limit_arp_cache_size = arp_limit; |
| 1548 | return 0; |
| 1549 | } |
| 1550 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1551 | /** |
| 1552 | * @brief Control Plane hook to remove an ARP entry |
| 1553 | */ |
| 1554 | int |
| 1555 | vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1556 | u32 sw_if_index, |
| 1557 | const |
| 1558 | ethernet_arp_ip4_over_ethernet_address_t * |
| 1559 | a) |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1560 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1561 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args; |
Damjan Marion | 102ec52 | 2016-03-29 13:18:17 +0200 | [diff] [blame] | 1562 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1563 | args.sw_if_index = sw_if_index; |
| 1564 | args.flags = ETHERNET_ARP_ARGS_REMOVE; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1565 | clib_memcpy_fast (&args.a, a, sizeof (*a)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1566 | |
| 1567 | vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback, |
| 1568 | (u8 *) & args, sizeof (args)); |
| 1569 | return 0; |
| 1570 | } |
| 1571 | |
| 1572 | /** |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1573 | * @brief publish wildcard arp event |
| 1574 | * @param sw_if_index The interface on which the ARP entires are acted |
| 1575 | */ |
| 1576 | static int |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1577 | vnet_arp_wc_publish (u32 sw_if_index, |
| 1578 | const ethernet_arp_ip4_over_ethernet_address_t * a) |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1579 | { |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1580 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { |
| 1581 | .flags = ETHERNET_ARP_ARGS_WC_PUB, |
| 1582 | .sw_if_index = sw_if_index, |
| 1583 | .a = *a |
| 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); |
Eyal Bari | 2019748 | 2017-09-13 12:29:08 +0300 | [diff] [blame] | 1605 | r->ip4 = args->a.ip4.as_u32; |
| 1606 | r->sw_if_index = args->sw_if_index; |
| 1607 | memcpy (r->mac, args->a.ethernet, sizeof r->mac); |
| 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 | |
| 1635 | e = arp_entry_find (eai, &args->a.ip4); |
| 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 | */ |
| 1649 | if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC) |
| 1650 | { |
| 1651 | e->flags &= ~ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC; |
| 1652 | } |
| 1653 | else if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC) |
| 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 = { |
| 1710 | .a.ip4.as_u32 = e->ip4_address.as_u32, |
| 1711 | .sw_if_index = e->sw_if_index, |
| 1712 | .flags = ETHERNET_ARP_ARGS_FLUSH, |
| 1713 | }; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1714 | clib_memcpy_fast (&delme.a.ethernet, e->ethernet_address, 6); |
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 | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1840 | e = arp_entry_find (eai, &args->a.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 | |
| 1865 | e = arp_entry_find (eai, &args->a.ip4); |
| 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 = { |
| 1919 | .a.ip4.as_u32 = e->ip4_address.as_u32, |
| 1920 | .sw_if_index = e->sw_if_index, |
| 1921 | }; |
| 1922 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1923 | clib_memcpy_fast (&update_me.a.ethernet, e->ethernet_address, 6); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1924 | |
| 1925 | if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) |
| 1926 | { |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1927 | update_me.flags = ETHERNET_ARP_ARGS_POPULATE; |
| 1928 | vnet_arp_populate_ip4_over_ethernet_internal (vnm, &update_me); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1929 | } |
| 1930 | else |
| 1931 | { |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1932 | update_me.flags = ETHERNET_ARP_ARGS_FLUSH; |
| 1933 | vnet_arp_flush_ip4_over_ethernet_internal (vnm, &update_me); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1934 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1935 | } |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1936 | vec_free (to_update); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1937 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1938 | return 0; |
| 1939 | } |
| 1940 | |
| 1941 | VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_arp_sw_interface_up_down); |
| 1942 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1943 | static void |
| 1944 | 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] | 1945 | { |
| 1946 | u8 old; |
| 1947 | int i; |
| 1948 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1949 | for (i = 3; i >= 0; i--) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1950 | { |
| 1951 | old = a->ip4.as_u8[i]; |
| 1952 | a->ip4.as_u8[i] += 1; |
| 1953 | if (old < a->ip4.as_u8[i]) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1954 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1955 | } |
| 1956 | |
| 1957 | for (i = 5; i >= 0; i--) |
| 1958 | { |
| 1959 | old = a->ethernet[i]; |
| 1960 | a->ethernet[i] += 1; |
| 1961 | if (old < a->ethernet[i]) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1962 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1963 | } |
| 1964 | } |
| 1965 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1966 | int |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1967 | vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm, |
Neale Ranns | cf7efe0 | 2018-09-24 08:34:11 +0000 | [diff] [blame] | 1968 | u32 sw_if_index, |
| 1969 | const ethernet_arp_ip4_over_ethernet_address_t |
| 1970 | * a, int is_static, int is_no_fib_entry) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1971 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1972 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args; |
| 1973 | |
| 1974 | args.sw_if_index = sw_if_index; |
| 1975 | args.is_static = is_static; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 1976 | args.is_no_fib_entry = is_no_fib_entry; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1977 | args.flags = 0; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 1978 | clib_memcpy_fast (&args.a, a, sizeof (*a)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1979 | |
| 1980 | vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback, |
| 1981 | (u8 *) & args, sizeof (args)); |
| 1982 | return 0; |
| 1983 | } |
| 1984 | |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 1985 | void |
| 1986 | proxy_arp_walk (proxy_arp_walk_t cb, void *data) |
| 1987 | { |
| 1988 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 1989 | ethernet_proxy_arp_t *pa; |
| 1990 | |
| 1991 | vec_foreach (pa, am->proxy_arps) |
| 1992 | { |
| 1993 | if (!cb (&pa->lo_addr, &pa->hi_addr, pa->fib_index, data)) |
| 1994 | break; |
| 1995 | } |
| 1996 | } |
| 1997 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1998 | int |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 1999 | vnet_proxy_arp_add_del (ip4_address_t * lo_addr, |
| 2000 | ip4_address_t * hi_addr, u32 fib_index, int is_del) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2001 | { |
| 2002 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2003 | ethernet_proxy_arp_t *pa; |
| 2004 | u32 found_at_index = ~0; |
| 2005 | |
| 2006 | vec_foreach (pa, am->proxy_arps) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2007 | { |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 2008 | if (pa->lo_addr.as_u32 == lo_addr->as_u32 && |
| 2009 | 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] | 2010 | { |
| 2011 | found_at_index = pa - am->proxy_arps; |
| 2012 | break; |
| 2013 | } |
| 2014 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2015 | |
| 2016 | if (found_at_index != ~0) |
| 2017 | { |
| 2018 | /* Delete, otherwise it's already in the table */ |
| 2019 | if (is_del) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2020 | vec_delete (am->proxy_arps, 1, found_at_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2021 | return 0; |
| 2022 | } |
| 2023 | /* delete, no such entry */ |
| 2024 | if (is_del) |
| 2025 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
| 2026 | |
| 2027 | /* add, not in table */ |
| 2028 | vec_add2 (am->proxy_arps, pa, 1); |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 2029 | pa->lo_addr.as_u32 = lo_addr->as_u32; |
| 2030 | pa->hi_addr.as_u32 = hi_addr->as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2031 | pa->fib_index = fib_index; |
| 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | /* |
Damjan Marion | 607de1a | 2016-08-16 22:53:54 +0200 | [diff] [blame] | 2036 | * Remove any proxy arp entries asdociated with the |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2037 | * specificed fib. |
| 2038 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2039 | int |
| 2040 | vnet_proxy_arp_fib_reset (u32 fib_id) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2041 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2042 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2043 | ethernet_proxy_arp_t *pa; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2044 | u32 *entries_to_delete = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2045 | u32 fib_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2046 | int i; |
| 2047 | |
Neale Ranns | 107e7d4 | 2017-04-11 09:55:19 -0700 | [diff] [blame] | 2048 | fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id); |
| 2049 | if (~0 == fib_index) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2050 | return VNET_API_ERROR_NO_SUCH_ENTRY; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2051 | |
| 2052 | vec_foreach (pa, am->proxy_arps) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2053 | { |
| 2054 | if (pa->fib_index == fib_index) |
| 2055 | { |
| 2056 | vec_add1 (entries_to_delete, pa - am->proxy_arps); |
| 2057 | } |
| 2058 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2059 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2060 | for (i = 0; i < vec_len (entries_to_delete); i++) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2061 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2062 | vec_delete (am->proxy_arps, 1, entries_to_delete[i]); |
| 2063 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2064 | |
| 2065 | vec_free (entries_to_delete); |
| 2066 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2067 | return 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2068 | } |
| 2069 | |
| 2070 | static clib_error_t * |
| 2071 | ip_arp_add_del_command_fn (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2072 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2073 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2074 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2075 | u32 sw_if_index; |
| 2076 | ethernet_arp_ip4_over_ethernet_address_t lo_addr, hi_addr, addr; |
| 2077 | int addr_valid = 0; |
| 2078 | int is_del = 0; |
| 2079 | int count = 1; |
| 2080 | u32 fib_index = 0; |
| 2081 | u32 fib_id; |
| 2082 | int is_static = 0; |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2083 | int is_no_fib_entry = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2084 | int is_proxy = 0; |
| 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, |
| 2092 | unformat_ethernet_address, &addr.ethernet)) |
| 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")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2099 | is_static = 1; |
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")) |
| 2102 | is_no_fib_entry = 1; |
| 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 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2145 | vnet_arp_set_ip4_over_ethernet |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2146 | (vnm, sw_if_index, &addr, is_static, is_no_fib_entry); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2147 | |
| 2148 | vlib_process_wait_for_event (vm); |
| 2149 | event_type = vlib_process_get_events (vm, &event_data); |
| 2150 | vec_reset_length (event_data); |
| 2151 | if (event_type != 1) |
| 2152 | clib_warning ("event type %d unexpected", event_type); |
| 2153 | } |
| 2154 | else |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2155 | vnet_arp_unset_ip4_over_ethernet (vnm, sw_if_index, &addr); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2156 | |
| 2157 | increment_ip4_and_mac_address (&addr); |
| 2158 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2159 | } |
| 2160 | else |
| 2161 | { |
| 2162 | return clib_error_return (0, "unknown input `%U'", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2163 | format_unformat_error, input); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2164 | } |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2165 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2166 | return 0; |
| 2167 | } |
| 2168 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2169 | /* *INDENT-OFF* */ |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2170 | /*? |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2171 | * Add or delete IPv4 ARP cache entries. |
| 2172 | * |
| 2173 | * @note 'set ip arp' options (e.g. delete, static, 'fib-id <id>', |
| 2174 | * 'count <number>', 'interface ip4_addr mac_addr') can be added in |
| 2175 | * any order and combination. |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2176 | * |
| 2177 | * @cliexpar |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2178 | * @parblock |
| 2179 | * Add or delete IPv4 ARP cache entries as follows. MAC Address can be in |
| 2180 | * either aa:bb:cc:dd:ee:ff format or aabb.ccdd.eeff format. |
| 2181 | * @cliexcmd{set ip arp GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2182 | * @cliexcmd{set ip arp delete GigabitEthernet2/0/0 6.0.0.3 de:ad:be:ef:ba:be} |
| 2183 | * |
| 2184 | * To add or delete an IPv4 ARP cache entry to or from a specific fib |
| 2185 | * table: |
| 2186 | * @cliexcmd{set ip arp fib-id 1 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2187 | * @cliexcmd{set ip arp fib-id 1 delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2188 | * |
| 2189 | * Add or delete IPv4 static ARP cache entries as follows: |
| 2190 | * @cliexcmd{set ip arp static GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2191 | * @cliexcmd{set ip arp static delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2192 | * |
| 2193 | * For testing / debugging purposes, the 'set ip arp' command can add or |
| 2194 | * delete multiple entries. Supply the 'count N' parameter: |
| 2195 | * @cliexcmd{set ip arp count 10 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe} |
| 2196 | * @endparblock |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2197 | ?*/ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2198 | VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2199 | .path = "set ip arp", |
| 2200 | .short_help = |
Neale Ranns | b3b2de7 | 2017-03-08 05:17:22 -0800 | [diff] [blame] | 2201 | "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] | 2202 | .function = ip_arp_add_del_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2203 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2204 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2205 | |
| 2206 | static clib_error_t * |
| 2207 | set_int_proxy_arp_command_fn (vlib_main_t * vm, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2208 | unformat_input_t * |
| 2209 | input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2210 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2211 | vnet_main_t *vnm = vnet_get_main (); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2212 | u32 sw_if_index; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2213 | vnet_sw_interface_t *si; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2214 | int enable = 0; |
| 2215 | int intfc_set = 0; |
| 2216 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2217 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2218 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2219 | if (unformat (input, "%U", unformat_vnet_sw_interface, |
| 2220 | vnm, &sw_if_index)) |
| 2221 | intfc_set = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2222 | else if (unformat (input, "enable") || unformat (input, "on")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2223 | enable = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2224 | else if (unformat (input, "disable") || unformat (input, "off")) |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2225 | enable = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2226 | else |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2227 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2228 | } |
| 2229 | |
| 2230 | if (intfc_set == 0) |
| 2231 | return clib_error_return (0, "unknown input '%U'", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2232 | format_unformat_error, input); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2233 | |
| 2234 | si = vnet_get_sw_interface (vnm, sw_if_index); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2235 | ASSERT (si); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2236 | if (enable) |
| 2237 | si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2238 | else |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2239 | si->flags &= ~VNET_SW_INTERFACE_FLAG_PROXY_ARP; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2240 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2241 | return 0; |
| 2242 | } |
| 2243 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2244 | /* *INDENT-OFF* */ |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2245 | /*? |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2246 | * Enable proxy-arp on an interface. The vpp stack will answer ARP |
| 2247 | * requests for the indicated address range. Multiple proxy-arp |
| 2248 | * ranges may be provisioned. |
| 2249 | * |
| 2250 | * @note Proxy ARP as a technology is infamous for blackholing traffic. |
| 2251 | * Also, the underlying implementation has not been performance-tuned. |
| 2252 | * Avoid creating an unnecessarily large set of ranges. |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2253 | * |
| 2254 | * @cliexpar |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2255 | * To enable proxy arp on a range of addresses, use: |
Billy McFall | 2d085d9 | 2016-09-13 21:47:55 -0400 | [diff] [blame] | 2256 | * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11} |
| 2257 | * Append 'del' to delete a range of proxy ARP addresses: |
| 2258 | * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11 del} |
| 2259 | * You must then specifically enable proxy arp on individual interfaces: |
| 2260 | * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 enable} |
| 2261 | * To disable proxy arp on an individual interface: |
| 2262 | * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 disable} |
Keith Burns (alagalah) | 6ef7bb9 | 2016-09-10 14:55:04 -0700 | [diff] [blame] | 2263 | ?*/ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2264 | VLIB_CLI_COMMAND (set_int_proxy_enable_command, static) = { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2265 | .path = "set interface proxy-arp", |
| 2266 | .short_help = |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2267 | "set interface proxy-arp <intfc> [enable|disable]", |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2268 | .function = set_int_proxy_arp_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2269 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2270 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2271 | |
| 2272 | |
| 2273 | /* |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2274 | * ARP/ND Termination in a L2 Bridge Domain based on IP4/IP6 to MAC |
| 2275 | * hash tables mac_by_ip4 and mac_by_ip6 for each BD. |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2276 | */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2277 | typedef enum |
| 2278 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2279 | ARP_TERM_NEXT_L2_OUTPUT, |
| 2280 | ARP_TERM_NEXT_DROP, |
| 2281 | ARP_TERM_N_NEXT, |
| 2282 | } arp_term_next_t; |
| 2283 | |
| 2284 | u32 arp_term_next_node_index[32]; |
| 2285 | |
| 2286 | static uword |
| 2287 | arp_term_l2bd (vlib_main_t * vm, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2288 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2289 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2290 | l2input_main_t *l2im = &l2input_main; |
| 2291 | u32 n_left_from, next_index, *from, *to_next; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2292 | u32 n_replies_sent = 0; |
| 2293 | u16 last_bd_index = ~0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2294 | l2_bridge_domain_t *last_bd_config = 0; |
| 2295 | l2_input_config_t *cfg0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2296 | |
| 2297 | from = vlib_frame_vector_args (frame); |
| 2298 | n_left_from = frame->n_vectors; |
| 2299 | next_index = node->cached_next_index; |
| 2300 | |
| 2301 | while (n_left_from > 0) |
| 2302 | { |
| 2303 | u32 n_left_to_next; |
| 2304 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2305 | 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] | 2306 | |
| 2307 | while (n_left_from > 0 && n_left_to_next > 0) |
| 2308 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2309 | vlib_buffer_t *p0; |
| 2310 | ethernet_header_t *eth0; |
| 2311 | ethernet_arp_header_t *arp0; |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2312 | ip6_header_t *iph0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2313 | u8 *l3h0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2314 | u32 pi0, error0, next0, sw_if_index0; |
| 2315 | u16 ethertype0; |
| 2316 | u16 bd_index0; |
| 2317 | u32 ip0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2318 | u8 *macp0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2319 | |
| 2320 | pi0 = from[0]; |
| 2321 | to_next[0] = pi0; |
| 2322 | from += 1; |
| 2323 | to_next += 1; |
| 2324 | n_left_from -= 1; |
| 2325 | n_left_to_next -= 1; |
| 2326 | |
| 2327 | p0 = vlib_get_buffer (vm, pi0); |
Eyal Bari | a0623f8 | 2017-03-30 03:05:06 +0300 | [diff] [blame] | 2328 | // Terminate only local (SHG == 0) ARP |
| 2329 | if (vnet_buffer (p0)->l2.shg != 0) |
| 2330 | goto next_l2_feature; |
| 2331 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2332 | eth0 = vlib_buffer_get_current (p0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2333 | l3h0 = (u8 *) eth0 + vnet_buffer (p0)->l2.l2_len; |
| 2334 | ethertype0 = clib_net_to_host_u16 (*(u16 *) (l3h0 - 2)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2335 | arp0 = (ethernet_arp_header_t *) l3h0; |
| 2336 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2337 | if (ethertype0 != ETHERNET_TYPE_ARP) |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2338 | goto check_ip6_nd; |
| 2339 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2340 | if ((arp0->opcode != |
| 2341 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request)) && |
| 2342 | (arp0->opcode != |
| 2343 | clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))) |
| 2344 | goto check_ip6_nd; |
| 2345 | |
| 2346 | /* Must be ARP request/reply packet here */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2347 | if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && |
| 2348 | (p0->flags & VLIB_BUFFER_IS_TRACED))) |
| 2349 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2350 | u8 *t0 = vlib_add_trace (vm, node, p0, |
| 2351 | sizeof (ethernet_arp_input_trace_t)); |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2352 | clib_memcpy_fast (t0, l3h0, |
| 2353 | sizeof (ethernet_arp_input_trace_t)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2354 | } |
| 2355 | |
John Lo | 0e6f4d6 | 2018-07-13 17:29:58 -0400 | [diff] [blame] | 2356 | error0 = 0; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2357 | error0 = |
| 2358 | (arp0->l2_type != |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2359 | clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) |
| 2360 | ? ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2361 | error0 = |
| 2362 | (arp0->l3_type != |
| 2363 | clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ? |
| 2364 | ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2365 | |
| 2366 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 2367 | |
| 2368 | if (error0) |
| 2369 | goto drop; |
| 2370 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2371 | /* Trash ARP packets whose ARP-level source addresses do not |
John Lo | 0131b6c | 2018-06-25 12:35:21 -0400 | [diff] [blame] | 2372 | match, or if requester address is mcast */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2373 | if (PREDICT_FALSE |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 2374 | (memcmp (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet, |
John Lo | 0131b6c | 2018-06-25 12:35:21 -0400 | [diff] [blame] | 2375 | sizeof (eth0->src_address)) || |
| 2376 | ethernet_address_cast (arp0->ip4_over_ethernet[0].ethernet))) |
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 */ |
| 2379 | if (memcmp (arp0->ip4_over_ethernet[0].ethernet, vrrp_prefix, |
| 2380 | sizeof (vrrp_prefix))) |
| 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 */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2413 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2414 | /* MAC found, send ARP reply - |
| 2415 | Convert ARP request packet to ARP reply */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2416 | arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply); |
| 2417 | arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0]; |
| 2418 | arp0->ip4_over_ethernet[0].ip4.as_u32 = ip0; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2419 | clib_memcpy_fast (arp0->ip4_over_ethernet[0].ethernet, macp0, 6); |
| 2420 | clib_memcpy_fast (eth0->dst_address, eth0->src_address, 6); |
| 2421 | clib_memcpy_fast (eth0->src_address, macp0, 6); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2422 | n_replies_sent += 1; |
| 2423 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2424 | output_response: |
| 2425 | /* For BVI, need to use l2-fwd node to send ARP reply as |
| 2426 | l2-output node cannot output packet to BVI properly */ |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2427 | cfg0 = vec_elt_at_index (l2im->configs, sw_if_index0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2428 | if (PREDICT_FALSE (cfg0->bvi)) |
| 2429 | { |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2430 | vnet_buffer (p0)->l2.feature_bitmap |= L2INPUT_FEAT_FWD; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2431 | vnet_buffer (p0)->sw_if_index[VLIB_RX] = 0; |
| 2432 | goto next_l2_feature; |
| 2433 | } |
| 2434 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2435 | /* Send ARP/ND reply back out input interface through l2-output */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2436 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| 2437 | next0 = ARP_TERM_NEXT_L2_OUTPUT; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2438 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2439 | to_next, n_left_to_next, pi0, |
| 2440 | next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2441 | continue; |
| 2442 | |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2443 | check_ip6_nd: |
| 2444 | /* IP6 ND event notification or solicitation handling to generate |
| 2445 | local response instead of flooding */ |
| 2446 | iph0 = (ip6_header_t *) l3h0; |
| 2447 | if (PREDICT_FALSE (ethertype0 == ETHERNET_TYPE_IP6 && |
| 2448 | iph0->protocol == IP_PROTOCOL_ICMP6 && |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2449 | !ip6_address_is_unspecified |
| 2450 | (&iph0->src_address))) |
| 2451 | { |
| 2452 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2453 | if (vnet_ip6_nd_term |
| 2454 | (vm, node, p0, eth0, iph0, sw_if_index0, |
Eyal Bari | a0623f8 | 2017-03-30 03:05:06 +0300 | [diff] [blame] | 2455 | vnet_buffer (p0)->l2.bd_index)) |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2456 | goto output_response; |
| 2457 | } |
| 2458 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2459 | next_l2_feature: |
| 2460 | { |
John Lo | beb0b2e | 2017-07-22 00:21:36 -0400 | [diff] [blame] | 2461 | next0 = vnet_l2_feature_next (p0, arp_term_next_node_index, |
| 2462 | L2INPUT_FEAT_ARP_TERM); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2463 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2464 | to_next, n_left_to_next, |
| 2465 | pi0, next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2466 | continue; |
| 2467 | } |
| 2468 | |
| 2469 | drop: |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2470 | if (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 || |
| 2471 | (arp0->ip4_over_ethernet[0].ip4.as_u32 == |
| 2472 | arp0->ip4_over_ethernet[1].ip4.as_u32)) |
| 2473 | { |
| 2474 | error0 = ETHERNET_ARP_ERROR_gratuitous_arp; |
| 2475 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2476 | next0 = ARP_TERM_NEXT_DROP; |
| 2477 | p0->error = node->errors[error0]; |
| 2478 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2479 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 2480 | to_next, n_left_to_next, pi0, |
| 2481 | next0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2482 | } |
| 2483 | |
| 2484 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 2485 | } |
| 2486 | |
| 2487 | vlib_error_count (vm, node->node_index, |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2488 | ETHERNET_ARP_ERROR_replies_sent, n_replies_sent); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2489 | return frame->n_vectors; |
| 2490 | } |
| 2491 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2492 | /* *INDENT-OFF* */ |
| 2493 | VLIB_REGISTER_NODE (arp_term_l2bd_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2494 | .function = arp_term_l2bd, |
| 2495 | .name = "arp-term-l2bd", |
| 2496 | .vector_size = sizeof (u32), |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2497 | .n_errors = ETHERNET_ARP_N_ERROR, |
| 2498 | .error_strings = ethernet_arp_error_strings, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2499 | .n_next_nodes = ARP_TERM_N_NEXT, |
| 2500 | .next_nodes = { |
| 2501 | [ARP_TERM_NEXT_L2_OUTPUT] = "l2-output", |
| 2502 | [ARP_TERM_NEXT_DROP] = "error-drop", |
| 2503 | }, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2504 | .format_buffer = format_ethernet_arp_header, |
John Lo | 1edfba9 | 2016-08-27 01:11:57 -0400 | [diff] [blame] | 2505 | .format_trace = format_arp_term_input_trace, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2506 | }; |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2507 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2508 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2509 | clib_error_t * |
| 2510 | arp_term_init (vlib_main_t * vm) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2511 | { |
| 2512 | // Initialize the feature next-node indexes |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2513 | feat_bitmap_init_next_nodes (vm, |
| 2514 | arp_term_l2bd_node.index, |
| 2515 | L2INPUT_N_FEAT, |
| 2516 | l2input_get_feat_names (), |
| 2517 | arp_term_next_node_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 2518 | return 0; |
| 2519 | } |
| 2520 | |
| 2521 | VLIB_INIT_FUNCTION (arp_term_init); |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2522 | |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2523 | void |
| 2524 | change_arp_mac (u32 sw_if_index, ethernet_arp_ip4_entry_t * e) |
| 2525 | { |
| 2526 | if (e->sw_if_index == sw_if_index) |
| 2527 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2528 | adj_nbr_walk_nh4 (e->sw_if_index, |
| 2529 | &e->ip4_address, arp_mk_complete_walk, e); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2530 | } |
| 2531 | } |
| 2532 | |
| 2533 | void |
Neale Ranns | 3be6b28 | 2016-12-20 14:24:01 +0000 | [diff] [blame] | 2534 | ethernet_arp_change_mac (u32 sw_if_index) |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2535 | { |
| 2536 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2537 | ethernet_arp_ip4_entry_t *e; |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 2538 | adj_index_t ai; |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2539 | |
| 2540 | /* *INDENT-OFF* */ |
| 2541 | pool_foreach (e, am->ip4_entry_pool, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 2542 | ({ |
| 2543 | change_arp_mac (sw_if_index, e); |
| 2544 | })); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2545 | /* *INDENT-ON* */ |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 2546 | |
| 2547 | ai = adj_glean_get (FIB_PROTOCOL_IP4, sw_if_index); |
| 2548 | |
| 2549 | if (ADJ_INDEX_INVALID != ai) |
| 2550 | adj_glean_update_rewrite (ai); |
Pavel Kotucek | c631f2d | 2016-09-26 10:40:02 +0200 | [diff] [blame] | 2551 | } |
| 2552 | |
John Lo | 7e9743a | 2017-09-23 08:59:58 -0400 | [diff] [blame] | 2553 | void |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2554 | send_ip4_garp (vlib_main_t * vm, u32 sw_if_index) |
Neale Ranns | 25b0494 | 2018-04-04 09:34:50 -0700 | [diff] [blame] | 2555 | { |
| 2556 | ip4_main_t *i4m = &ip4_main; |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2557 | 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] | 2558 | |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2559 | send_ip4_garp_w_addr (vm, ip4_addr, sw_if_index); |
Neale Ranns | 25b0494 | 2018-04-04 09:34:50 -0700 | [diff] [blame] | 2560 | } |
| 2561 | |
| 2562 | void |
| 2563 | send_ip4_garp_w_addr (vlib_main_t * vm, |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2564 | const ip4_address_t * ip4_addr, u32 sw_if_index) |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2565 | { |
| 2566 | ip4_main_t *i4m = &ip4_main; |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2567 | vnet_main_t *vnm = vnet_get_main (); |
| 2568 | u8 *rewrite, rewrite_len; |
| 2569 | 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] | 2570 | |
| 2571 | if (ip4_addr) |
| 2572 | { |
| 2573 | clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d", |
| 2574 | format_ip4_address, ip4_addr, sw_if_index); |
| 2575 | |
| 2576 | /* Form GARP packet for output - Gratuitous ARP is an ARP request packet |
| 2577 | where the interface IP/MAC pair is used for both source and request |
| 2578 | MAC/IP pairs in the request */ |
| 2579 | u32 bi = 0; |
| 2580 | ethernet_arp_header_t *h = vlib_packet_template_get_packet |
| 2581 | (vm, &i4m->ip4_arp_request_packet_template, &bi); |
John Lo | 084606b | 2018-06-19 15:27:48 -0400 | [diff] [blame] | 2582 | |
| 2583 | if (!h) |
| 2584 | return; |
| 2585 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2586 | clib_memcpy_fast (h->ip4_over_ethernet[0].ethernet, hi->hw_address, |
| 2587 | sizeof (h->ip4_over_ethernet[0].ethernet)); |
| 2588 | clib_memcpy_fast (h->ip4_over_ethernet[1].ethernet, hi->hw_address, |
| 2589 | sizeof (h->ip4_over_ethernet[1].ethernet)); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2590 | h->ip4_over_ethernet[0].ip4 = ip4_addr[0]; |
| 2591 | h->ip4_over_ethernet[1].ip4 = ip4_addr[0]; |
| 2592 | |
| 2593 | /* Setup MAC header with ARP Etype and broadcast DMAC */ |
| 2594 | vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2595 | rewrite = |
| 2596 | ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_ARP, |
| 2597 | VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST); |
| 2598 | rewrite_len = vec_len (rewrite); |
| 2599 | vlib_buffer_advance (b, -rewrite_len); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2600 | ethernet_header_t *e = vlib_buffer_get_current (b); |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 2601 | clib_memcpy_fast (e->dst_address, rewrite, rewrite_len); |
Steven | 9f781d8 | 2018-06-05 11:09:32 -0700 | [diff] [blame] | 2602 | vec_free (rewrite); |
John Lo | 8b81cb4 | 2017-06-26 01:40:20 -0400 | [diff] [blame] | 2603 | |
| 2604 | /* Send GARP packet out the specified interface */ |
| 2605 | vnet_buffer (b)->sw_if_index[VLIB_RX] = |
| 2606 | vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; |
| 2607 | vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); |
| 2608 | u32 *to_next = vlib_frame_vector_args (f); |
| 2609 | to_next[0] = bi; |
| 2610 | f->n_vectors = 1; |
| 2611 | vlib_put_frame_to_node (vm, hi->output_node_index, f); |
| 2612 | } |
| 2613 | } |
| 2614 | |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2615 | /* |
Pavel Kotucek | 18934e6 | 2018-11-14 09:24:16 +0100 | [diff] [blame] | 2616 | * Remove any arp entries asociated with the specificed interface |
| 2617 | */ |
| 2618 | void |
| 2619 | vnet_arp_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) |
| 2620 | { |
| 2621 | if (!is_add && sw_if_index != ~0) |
| 2622 | { |
| 2623 | ethernet_arp_main_t *am = ðernet_arp_main; |
| 2624 | ethernet_arp_ip4_entry_t *e; |
| 2625 | /* *INDENT-OFF* */ |
| 2626 | pool_foreach (e, am->ip4_entry_pool, ({ |
| 2627 | if (e->sw_if_index != sw_if_index) |
| 2628 | continue; |
| 2629 | vnet_arp_set_ip4_over_ethernet_rpc_args_t args = { .sw_if_index = sw_if_index, |
| 2630 | .a.ip4 = e->ip4_address }; |
| 2631 | vnet_arp_unset_ip4_over_ethernet_internal (vnm, &args); |
| 2632 | })); |
| 2633 | /* *INDENT-ON* */ |
| 2634 | } |
| 2635 | } |
| 2636 | |
| 2637 | VNET_SW_INTERFACE_ADD_DEL_FUNCTION (vnet_arp_delete_sw_interface); |
| 2638 | |
| 2639 | /* |
Keith Burns (alagalah) | e70dcc8 | 2016-08-15 18:33:19 -0700 | [diff] [blame] | 2640 | * fd.io coding-style-patch-verification: ON |
| 2641 | * |
| 2642 | * Local Variables: |
| 2643 | * eval: (c-set-style "gnu") |
| 2644 | * End: |
| 2645 | */ |