Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * proxy_node.c: dhcp proxy node processing |
| 3 | * |
| 4 | * Copyright (c) 2013 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 <vlib/vlib.h> |
| 19 | #include <vnet/pg/pg.h> |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 20 | #include <vnet/dhcp/dhcp_proxy.h> |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 21 | #include <vnet/dhcp/client.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 22 | #include <vnet/fib/ip4_fib.h> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 23 | |
| 24 | static char * dhcp_proxy_error_strings[] = { |
| 25 | #define dhcp_proxy_error(n,s) s, |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 26 | #include <vnet/dhcp/dhcp4_proxy_error.def> |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 27 | #undef dhcp_proxy_error |
| 28 | }; |
| 29 | |
| 30 | #define foreach_dhcp_proxy_to_server_input_next \ |
| 31 | _ (DROP, "error-drop") \ |
| 32 | _ (LOOKUP, "ip4-lookup") \ |
| 33 | _ (SEND_TO_CLIENT, "dhcp-proxy-to-client") |
| 34 | |
| 35 | typedef enum { |
| 36 | #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s, |
| 37 | foreach_dhcp_proxy_to_server_input_next |
| 38 | #undef _ |
| 39 | DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, |
| 40 | } dhcp_proxy_to_server_input_next_t; |
| 41 | |
| 42 | typedef struct { |
| 43 | /* 0 => to server, 1 => to client */ |
| 44 | int which; |
| 45 | ip4_address_t trace_ip4_address; |
| 46 | u32 error; |
| 47 | u32 sw_if_index; |
| 48 | u32 original_sw_if_index; |
| 49 | } dhcp_proxy_trace_t; |
| 50 | |
| 51 | #define VPP_DHCP_OPTION82_SUB1_SIZE 6 |
| 52 | #define VPP_DHCP_OPTION82_SUB5_SIZE 6 |
| 53 | #define VPP_DHCP_OPTION82_VSS_SIZE 12 |
| 54 | #define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \ |
| 55 | VPP_DHCP_OPTION82_SUB5_SIZE + \ |
| 56 | VPP_DHCP_OPTION82_VSS_SIZE +3) |
| 57 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 58 | static vlib_node_registration_t dhcp_proxy_to_server_node; |
| 59 | static vlib_node_registration_t dhcp_proxy_to_client_node; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 60 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 61 | static u8 * |
| 62 | format_dhcp_proxy_trace (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 63 | { |
| 64 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| 65 | CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| 66 | dhcp_proxy_trace_t * t = va_arg (*args, dhcp_proxy_trace_t *); |
| 67 | |
| 68 | if (t->which == 0) |
| 69 | s = format (s, "DHCP proxy: sent to server %U\n", |
| 70 | format_ip4_address, &t->trace_ip4_address, t->error); |
| 71 | else |
| 72 | s = format (s, "DHCP proxy: broadcast to client from %U\n", |
| 73 | format_ip4_address, &t->trace_ip4_address); |
| 74 | |
| 75 | if (t->error != (u32)~0) |
| 76 | s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]); |
| 77 | |
| 78 | s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n", |
| 79 | t->original_sw_if_index, t->sw_if_index); |
| 80 | |
| 81 | return s; |
| 82 | } |
| 83 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 84 | static u8 * |
| 85 | format_dhcp_proxy_header_with_length (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 86 | { |
| 87 | dhcp_header_t * h = va_arg (*args, dhcp_header_t *); |
| 88 | u32 max_header_bytes = va_arg (*args, u32); |
| 89 | u32 header_bytes; |
| 90 | |
| 91 | header_bytes = sizeof (h[0]); |
| 92 | if (max_header_bytes != 0 && header_bytes > max_header_bytes) |
| 93 | return format (s, "dhcp header truncated"); |
| 94 | |
| 95 | s = format (s, "DHCP Proxy"); |
| 96 | |
| 97 | return s; |
| 98 | } |
| 99 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 100 | static uword |
| 101 | dhcp_proxy_to_server_input (vlib_main_t * vm, |
| 102 | vlib_node_runtime_t * node, |
| 103 | vlib_frame_t * from_frame) |
| 104 | { |
| 105 | u32 n_left_from, next_index, * from, * to_next; |
| 106 | dhcp_proxy_main_t * dpm = &dhcp_proxy_main; |
| 107 | from = vlib_frame_vector_args (from_frame); |
| 108 | n_left_from = from_frame->n_vectors; |
| 109 | u32 pkts_to_server=0, pkts_to_client=0, pkts_no_server=0; |
| 110 | u32 pkts_no_interface_address=0; |
| 111 | u32 pkts_too_big=0; |
| 112 | ip4_main_t * im = &ip4_main; |
| 113 | |
| 114 | next_index = node->cached_next_index; |
| 115 | |
| 116 | while (n_left_from > 0) |
| 117 | { |
| 118 | u32 n_left_to_next; |
| 119 | |
| 120 | vlib_get_next_frame (vm, node, next_index, |
| 121 | to_next, n_left_to_next); |
| 122 | |
| 123 | while (n_left_from > 0 && n_left_to_next > 0) |
| 124 | { |
| 125 | u32 bi0; |
| 126 | vlib_buffer_t * b0; |
| 127 | udp_header_t * u0; |
| 128 | dhcp_header_t * h0; |
| 129 | ip4_header_t * ip0; |
| 130 | u32 next0; |
| 131 | u32 old0, new0; |
| 132 | ip_csum_t sum0; |
| 133 | u32 error0 = (u32) ~0; |
| 134 | u32 sw_if_index = 0; |
| 135 | u32 original_sw_if_index = 0; |
| 136 | u8 *end = NULL; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 137 | u32 fib_index; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 138 | dhcp_proxy_t *proxy; |
| 139 | dhcp_server_t *server; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 140 | u32 rx_sw_if_index; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 141 | dhcp_option_t *o; |
| 142 | u32 len = 0; |
| 143 | vlib_buffer_free_list_t *fl; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 144 | u8 is_discover = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 145 | |
| 146 | bi0 = from[0]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 147 | from += 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 148 | n_left_from -= 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 149 | |
| 150 | b0 = vlib_get_buffer (vm, bi0); |
| 151 | |
| 152 | h0 = vlib_buffer_get_current (b0); |
| 153 | |
| 154 | /* |
| 155 | * udp_local hands us the DHCP header, need udp hdr, |
| 156 | * ip hdr to relay to server |
| 157 | */ |
| 158 | vlib_buffer_advance (b0, -(sizeof(*u0))); |
| 159 | u0 = vlib_buffer_get_current (b0); |
| 160 | |
| 161 | /* This blows. Return traffic has src_port = 67, dst_port = 67 */ |
| 162 | if (u0->src_port == clib_net_to_host_u16(UDP_DST_PORT_dhcp_to_server)) |
| 163 | { |
| 164 | vlib_buffer_advance (b0, sizeof(*u0)); |
| 165 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT; |
| 166 | error0 = 0; |
| 167 | pkts_to_client++; |
| 168 | goto do_enqueue; |
| 169 | } |
| 170 | |
| 171 | rx_sw_if_index = vnet_buffer(b0)->sw_if_index[VLIB_RX]; |
| 172 | |
| 173 | fib_index = im->fib_index_by_sw_if_index [rx_sw_if_index]; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 174 | proxy = dhcp_get_proxy(dpm, fib_index, FIB_PROTOCOL_IP4); |
| 175 | |
| 176 | if (PREDICT_FALSE (NULL == proxy)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 177 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 178 | error0 = DHCP_PROXY_ERROR_NO_SERVER; |
| 179 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
| 180 | pkts_no_server++; |
| 181 | goto do_trace; |
| 182 | } |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 183 | |
| 184 | server = &proxy->dhcp_servers[0]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 185 | vlib_buffer_advance (b0, -(sizeof(*ip0))); |
| 186 | ip0 = vlib_buffer_get_current (b0); |
| 187 | |
| 188 | /* disable UDP checksum */ |
| 189 | u0->checksum = 0; |
| 190 | sum0 = ip0->checksum; |
| 191 | old0 = ip0->dst_address.as_u32; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 192 | new0 = server->dhcp_server.ip4.as_u32; |
| 193 | ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 194 | sum0 = ip_csum_update (sum0, old0, new0, |
| 195 | ip4_header_t /* structure */, |
| 196 | dst_address /* changed member */); |
| 197 | ip0->checksum = ip_csum_fold (sum0); |
| 198 | |
| 199 | sum0 = ip0->checksum; |
| 200 | old0 = ip0->src_address.as_u32; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 201 | new0 = proxy->dhcp_src_address.ip4.as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 202 | ip0->src_address.as_u32 = new0; |
| 203 | sum0 = ip_csum_update (sum0, old0, new0, |
| 204 | ip4_header_t /* structure */, |
| 205 | src_address /* changed member */); |
| 206 | ip0->checksum = ip_csum_fold (sum0); |
| 207 | |
| 208 | /* Send to DHCP server via the configured FIB */ |
| 209 | vnet_buffer(b0)->sw_if_index[VLIB_TX] = |
| 210 | server->server_fib_index; |
| 211 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 212 | h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 213 | pkts_to_server++; |
| 214 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 215 | o = (dhcp_option_t *) h0->options; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 216 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 217 | fib_index = im->fib_index_by_sw_if_index |
| 218 | [vnet_buffer(b0)->sw_if_index[VLIB_RX]]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 219 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 220 | end = b0->data + b0->current_data + b0->current_length; |
| 221 | /* TLVs are not performance-friendly... */ |
| 222 | while (o->option != 0xFF /* end of options */ && (u8 *)o < end) |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 223 | { |
| 224 | if (DHCP_PACKET_OPTION_MSG_TYPE == o->option) |
| 225 | { |
| 226 | if (DHCP_PACKET_DISCOVER == o->data[0]) |
| 227 | { |
| 228 | is_discover = 1; |
| 229 | } |
| 230 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 231 | o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 232 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 233 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 234 | fl = vlib_buffer_get_free_list (vm, b0->free_list_index); |
| 235 | // start write at (option*)o, some packets have padding |
| 236 | if (((u8 *)o - (u8 *)b0->data + VPP_DHCP_OPTION82_SIZE) > fl->n_data_bytes) |
| 237 | { |
| 238 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
| 239 | pkts_too_big++; |
| 240 | goto do_trace; |
| 241 | } |
| 242 | |
| 243 | if ((o->option == 0xFF) && ((u8 *)o <= end)) |
| 244 | { |
| 245 | vnet_main_t *vnm = vnet_get_main(); |
| 246 | u16 old_l0, new_l0; |
| 247 | ip4_address_t _ia0, * ia0 = &_ia0; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 248 | dhcp_vss_t *vss; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 249 | vnet_sw_interface_t *swif; |
| 250 | sw_if_index = 0; |
| 251 | original_sw_if_index = 0; |
| 252 | |
| 253 | original_sw_if_index = sw_if_index = |
| 254 | vnet_buffer(b0)->sw_if_index[VLIB_RX]; |
| 255 | swif = vnet_get_sw_interface (vnm, sw_if_index); |
| 256 | if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) |
| 257 | sw_if_index = swif->unnumbered_sw_if_index; |
| 258 | |
| 259 | /* |
| 260 | * Get the first ip4 address on the [client-side] |
| 261 | * RX interface, if not unnumbered. otherwise use |
| 262 | * the loopback interface's ip address. |
| 263 | */ |
| 264 | ia0 = ip4_interface_first_address(&ip4_main, sw_if_index, 0); |
| 265 | |
| 266 | if (ia0 == 0) |
| 267 | { |
| 268 | error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 269 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 270 | pkts_no_interface_address++; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 271 | goto do_trace; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 272 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 273 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 274 | /* Add option 82 */ |
| 275 | o->option = 82; /* option 82 */ |
| 276 | o->length = 12; /* 12 octets to follow */ |
| 277 | o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */ |
| 278 | o->data[1] = 4; /* length of suboption */ |
| 279 | o->data[2] = (original_sw_if_index >> 24) & 0xFF; |
| 280 | o->data[3] = (original_sw_if_index >> 16) & 0xFF; |
| 281 | o->data[4] = (original_sw_if_index >> 8) & 0xFF; |
| 282 | o->data[5] = (original_sw_if_index >> 0) & 0xFF; |
| 283 | o->data[6] = 5; /* suboption 5 (client RX intfc address) */ |
| 284 | o->data[7] = 4; /* length 4 */ |
| 285 | o->data[8] = ia0->as_u8[0]; |
| 286 | o->data[9] = ia0->as_u8[1]; |
| 287 | o->data[10] = ia0->as_u8[2]; |
| 288 | o->data[11] = ia0->as_u8[3]; |
| 289 | o->data[12] = 0xFF; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 290 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 291 | vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 292 | if (NULL != vss) |
| 293 | { |
| 294 | u32 opt82_fib_id=0, opt82_oui=0; |
| 295 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 296 | opt82_oui = vss->oui; |
| 297 | opt82_fib_id = vss->fib_id; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 298 | |
| 299 | o->data[12] = 151; /* vss suboption */ |
| 300 | if (255 == opt82_fib_id) { |
| 301 | o->data[13] = 1; /* length */ |
| 302 | o->data[14] = 255; /* vss option type */ |
| 303 | o->data[15] = 152; /* vss control suboption */ |
| 304 | o->data[16] = 0; /* length */ |
| 305 | /* and a new "end-of-options" option (0xff) */ |
| 306 | o->data[17] = 0xFF; |
| 307 | o->length += 5; |
| 308 | } else { |
| 309 | o->data[13] = 8; /* length */ |
| 310 | o->data[14] = 1; /* vss option type */ |
| 311 | o->data[15] = (opt82_oui >> 16) & 0xff; |
| 312 | o->data[16] = (opt82_oui >> 8) & 0xff; |
| 313 | o->data[17] = (opt82_oui ) & 0xff; |
| 314 | o->data[18] = (opt82_fib_id >> 24) & 0xff; |
| 315 | o->data[19] = (opt82_fib_id >> 16) & 0xff; |
| 316 | o->data[20] = (opt82_fib_id >> 8) & 0xff; |
| 317 | o->data[21] = (opt82_fib_id) & 0xff; |
| 318 | o->data[22] = 152; /* vss control suboption */ |
| 319 | o->data[23] = 0; /* length */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 320 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 321 | /* and a new "end-of-options" option (0xff) */ |
| 322 | o->data[24] = 0xFF; |
| 323 | o->length += 12; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 324 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 325 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 326 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 327 | len = o->length + 3; |
| 328 | b0->current_length += len; |
| 329 | /* Fix IP header length and checksum */ |
| 330 | old_l0 = ip0->length; |
| 331 | new_l0 = clib_net_to_host_u16 (old_l0); |
| 332 | new_l0 += len; |
| 333 | new_l0 = clib_host_to_net_u16 (new_l0); |
| 334 | ip0->length = new_l0; |
| 335 | sum0 = ip0->checksum; |
| 336 | sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, |
| 337 | length /* changed member */); |
| 338 | ip0->checksum = ip_csum_fold (sum0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 339 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 340 | /* Fix UDP length */ |
| 341 | new_l0 = clib_net_to_host_u16 (u0->length); |
| 342 | new_l0 += len; |
| 343 | u0->length = clib_host_to_net_u16 (new_l0); |
| 344 | } else { |
| 345 | vlib_node_increment_counter |
| 346 | (vm, dhcp_proxy_to_server_node.index, |
| 347 | DHCP_PROXY_ERROR_OPTION_82_ERROR, 1); |
| 348 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 349 | |
| 350 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP; |
| 351 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 352 | /* |
| 353 | * If we have multiple servers configured and this is the |
| 354 | * client's discover message, then send copies to each of |
| 355 | * those servers |
| 356 | */ |
| 357 | if (is_discover && vec_len(proxy->dhcp_servers) > 1) |
| 358 | { |
| 359 | u32 ii; |
| 360 | |
| 361 | for (ii = 1; ii < vec_len(proxy->dhcp_servers); ii++) |
| 362 | { |
| 363 | vlib_buffer_t *c0; |
| 364 | u32 ci0; |
| 365 | |
| 366 | c0 = vlib_buffer_copy(vm, b0); |
| 367 | ci0 = vlib_get_buffer_index(vm, c0); |
| 368 | server = &proxy->dhcp_servers[ii]; |
| 369 | |
| 370 | ip0 = vlib_buffer_get_current (c0); |
| 371 | |
| 372 | sum0 = ip0->checksum; |
| 373 | old0 = ip0->dst_address.as_u32; |
| 374 | new0 = server->dhcp_server.ip4.as_u32; |
| 375 | ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; |
| 376 | sum0 = ip_csum_update (sum0, old0, new0, |
| 377 | ip4_header_t /* structure */, |
| 378 | dst_address /* changed member */); |
| 379 | ip0->checksum = ip_csum_fold (sum0); |
| 380 | |
| 381 | to_next[0] = ci0; |
| 382 | to_next += 1; |
| 383 | n_left_to_next -= 1; |
| 384 | |
| 385 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 386 | to_next, n_left_to_next, |
| 387 | ci0, next0); |
| 388 | |
| 389 | if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 390 | { |
| 391 | dhcp_proxy_trace_t *tr; |
| 392 | |
| 393 | tr = vlib_add_trace (vm, node, c0, sizeof (*tr)); |
| 394 | tr->which = 0; /* to server */ |
| 395 | tr->error = error0; |
| 396 | tr->original_sw_if_index = original_sw_if_index; |
| 397 | tr->sw_if_index = sw_if_index; |
| 398 | if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) |
| 399 | tr->trace_ip4_address.as_u32 = server->dhcp_server.ip4.as_u32; |
| 400 | } |
| 401 | |
| 402 | if (PREDICT_FALSE(0 == n_left_to_next)) |
| 403 | { |
| 404 | vlib_put_next_frame (vm, node, next_index, |
| 405 | n_left_to_next); |
| 406 | vlib_get_next_frame (vm, node, next_index, |
| 407 | to_next, n_left_to_next); |
| 408 | } |
| 409 | } |
| 410 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 411 | do_trace: |
| 412 | if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 413 | { |
| 414 | dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node, |
| 415 | b0, sizeof (*tr)); |
| 416 | tr->which = 0; /* to server */ |
| 417 | tr->error = error0; |
| 418 | tr->original_sw_if_index = original_sw_if_index; |
| 419 | tr->sw_if_index = sw_if_index; |
| 420 | if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 421 | tr->trace_ip4_address.as_u32 = |
| 422 | proxy->dhcp_servers[0].dhcp_server.ip4.as_u32; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | do_enqueue: |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 426 | to_next[0] = bi0; |
| 427 | to_next += 1; |
| 428 | n_left_to_next -= 1; |
| 429 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 430 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 431 | to_next, n_left_to_next, |
| 432 | bi0, next0); |
| 433 | } |
| 434 | |
| 435 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 436 | } |
| 437 | |
| 438 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 439 | DHCP_PROXY_ERROR_RELAY_TO_CLIENT, |
| 440 | pkts_to_client); |
| 441 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 442 | DHCP_PROXY_ERROR_RELAY_TO_SERVER, |
| 443 | pkts_to_server); |
| 444 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 445 | DHCP_PROXY_ERROR_NO_SERVER, |
| 446 | pkts_no_server); |
| 447 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 448 | DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS, |
| 449 | pkts_no_interface_address); |
| 450 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 451 | DHCP_PROXY_ERROR_PKT_TOO_BIG, |
| 452 | pkts_too_big); |
| 453 | return from_frame->n_vectors; |
| 454 | } |
| 455 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 456 | VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 457 | .function = dhcp_proxy_to_server_input, |
| 458 | .name = "dhcp-proxy-to-server", |
| 459 | /* Takes a vector of packets. */ |
| 460 | .vector_size = sizeof (u32), |
| 461 | |
| 462 | .n_errors = DHCP_PROXY_N_ERROR, |
| 463 | .error_strings = dhcp_proxy_error_strings, |
| 464 | |
| 465 | .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, |
| 466 | .next_nodes = { |
| 467 | #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n, |
| 468 | foreach_dhcp_proxy_to_server_input_next |
| 469 | #undef _ |
| 470 | }, |
| 471 | |
| 472 | .format_buffer = format_dhcp_proxy_header_with_length, |
| 473 | .format_trace = format_dhcp_proxy_trace, |
| 474 | #if 0 |
| 475 | .unformat_buffer = unformat_dhcp_proxy_header, |
| 476 | #endif |
| 477 | }; |
| 478 | |
| 479 | static uword |
| 480 | dhcp_proxy_to_client_input (vlib_main_t * vm, |
| 481 | vlib_node_runtime_t * node, |
| 482 | vlib_frame_t * from_frame) |
| 483 | { |
| 484 | u32 n_left_from, * from; |
| 485 | ethernet_main_t *em = ethernet_get_main (vm); |
| 486 | dhcp_proxy_main_t * dpm = &dhcp_proxy_main; |
| 487 | vnet_main_t * vnm = vnet_get_main(); |
| 488 | ip4_main_t * im = &ip4_main; |
| 489 | |
| 490 | from = vlib_frame_vector_args (from_frame); |
| 491 | n_left_from = from_frame->n_vectors; |
| 492 | |
| 493 | while (n_left_from > 0) |
| 494 | { |
| 495 | u32 bi0; |
| 496 | vlib_buffer_t * b0; |
| 497 | udp_header_t * u0; |
| 498 | dhcp_header_t * h0; |
| 499 | ip4_header_t * ip0 = 0; |
| 500 | ip4_address_t * ia0 = 0; |
| 501 | u32 old0, new0; |
| 502 | ip_csum_t sum0; |
| 503 | ethernet_interface_t *ei0; |
| 504 | ethernet_header_t *mac0; |
| 505 | vnet_hw_interface_t *hi0; |
| 506 | vlib_frame_t *f0; |
| 507 | u32 * to_next0; |
| 508 | u32 sw_if_index = ~0; |
| 509 | vnet_sw_interface_t *si0; |
| 510 | u32 error0 = (u32)~0; |
| 511 | vnet_sw_interface_t *swif; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 512 | u32 fib_index; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 513 | dhcp_proxy_t *proxy; |
| 514 | dhcp_server_t *server; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 515 | u32 original_sw_if_index = (u32) ~0; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 516 | ip4_address_t relay_addr = { |
| 517 | .as_u32 = 0, |
| 518 | }; |
| 519 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 520 | bi0 = from[0]; |
| 521 | from += 1; |
| 522 | n_left_from -= 1; |
| 523 | |
| 524 | b0 = vlib_get_buffer (vm, bi0); |
| 525 | h0 = vlib_buffer_get_current (b0); |
| 526 | |
| 527 | /* |
| 528 | * udp_local hands us the DHCP header, need udp hdr, |
| 529 | * ip hdr to relay to client |
| 530 | */ |
| 531 | vlib_buffer_advance (b0, -(sizeof(*u0))); |
| 532 | u0 = vlib_buffer_get_current (b0); |
| 533 | |
| 534 | vlib_buffer_advance (b0, -(sizeof(*ip0))); |
| 535 | ip0 = vlib_buffer_get_current (b0); |
| 536 | |
| 537 | /* Consumed by dhcp client code? */ |
| 538 | if (dhcp_client_for_us (bi0, b0, ip0, u0, h0)) |
| 539 | continue; |
| 540 | |
| 541 | if (1 /* dpm->insert_option_82 */) |
| 542 | { |
| 543 | dhcp_option_t *o = (dhcp_option_t *) h0->options; |
| 544 | dhcp_option_t *sub; |
| 545 | |
| 546 | /* Parse through TLVs looking for option 82. |
| 547 | The circuit-ID is the FIB number we need |
| 548 | to track down the client-facing interface */ |
| 549 | |
| 550 | while (o->option != 0xFF /* end of options */ && |
| 551 | (u8 *) o < (b0->data + b0->current_data + b0->current_length)) |
| 552 | { |
| 553 | if (o->option == 82) |
| 554 | { |
| 555 | u32 vss_exist = 0; |
| 556 | u32 vss_ctrl = 0; |
| 557 | sub = (dhcp_option_t *) &o->data[0]; |
| 558 | while (sub->option != 0xFF /* end of options */ && |
| 559 | (u8 *) sub < (u8 *)(o + o->length)) { |
| 560 | /* If this is one of ours, it will have |
| 561 | total length 12, circuit-id suboption type, |
| 562 | and the sw_if_index */ |
| 563 | if (sub->option == 1 && sub->length == 4) |
| 564 | { |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 565 | sw_if_index = ((sub->data[0] << 24) | |
| 566 | (sub->data[1] << 16) | |
| 567 | (sub->data[2] << 8) | |
| 568 | (sub->data[3])); |
| 569 | } |
| 570 | else if (sub->option == 5 && sub->length == 4) |
| 571 | { |
| 572 | relay_addr.as_u8[0] = sub->data[0]; |
| 573 | relay_addr.as_u8[1] = sub->data[1]; |
| 574 | relay_addr.as_u8[2] = sub->data[2]; |
| 575 | relay_addr.as_u8[3] = sub->data[3]; |
| 576 | } |
| 577 | else if (sub->option == 151 && |
| 578 | sub->length == 7 && |
| 579 | sub->data[0] == 1) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 580 | vss_exist = 1; |
| 581 | else if (sub->option == 152 && sub->length == 0) |
| 582 | vss_ctrl = 1; |
| 583 | sub = (dhcp_option_t *) |
| 584 | (((uword) sub) + (sub->length + 2)); |
| 585 | } |
| 586 | if (vss_ctrl && vss_exist) |
| 587 | vlib_node_increment_counter |
| 588 | (vm, dhcp_proxy_to_client_node.index, |
| 589 | DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1); |
| 590 | |
| 591 | } |
| 592 | o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | if (sw_if_index == (u32)~0) |
| 597 | { |
| 598 | error0 = DHCP_PROXY_ERROR_NO_OPTION_82; |
| 599 | |
| 600 | drop_packet: |
| 601 | vlib_node_increment_counter (vm, dhcp_proxy_to_client_node.index, |
| 602 | error0, 1); |
| 603 | f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index); |
| 604 | to_next0 = vlib_frame_vector_args (f0); |
| 605 | to_next0[0] = bi0; |
| 606 | f0->n_vectors = 1; |
| 607 | vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0); |
| 608 | goto do_trace; |
| 609 | } |
| 610 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 611 | if (relay_addr.as_u32 == 0) |
| 612 | { |
| 613 | error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR; |
| 614 | goto drop_packet; |
| 615 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 616 | |
| 617 | if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index)) |
| 618 | { |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 619 | error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 620 | goto drop_packet; |
| 621 | } |
| 622 | |
| 623 | fib_index = im->fib_index_by_sw_if_index [sw_if_index]; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 624 | proxy = dhcp_get_proxy(dpm, fib_index, FIB_PROTOCOL_IP4); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 625 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 626 | if (PREDICT_FALSE (NULL == proxy)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 627 | { |
| 628 | error0 = DHCP_PROXY_ERROR_NO_SERVER; |
| 629 | goto drop_packet; |
| 630 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 631 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 632 | vec_foreach(server, proxy->dhcp_servers) |
| 633 | { |
| 634 | if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32) |
| 635 | { |
| 636 | goto server_found; |
| 637 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 638 | } |
| 639 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 640 | error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS; |
| 641 | goto drop_packet; |
| 642 | |
| 643 | server_found: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 644 | vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index; |
| 645 | |
| 646 | swif = vnet_get_sw_interface (vnm, sw_if_index); |
| 647 | original_sw_if_index = sw_if_index; |
| 648 | if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) |
| 649 | sw_if_index = swif->unnumbered_sw_if_index; |
| 650 | |
Dave Barach | 203c632 | 2016-06-26 10:29:03 -0400 | [diff] [blame] | 651 | ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 652 | if (ia0 == 0) |
| 653 | { |
| 654 | error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; |
| 655 | goto drop_packet; |
| 656 | } |
| 657 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 658 | if (relay_addr.as_u32 != ia0->as_u32) |
| 659 | { |
| 660 | error0 = DHCP_PROXY_ERROR_BAD_YIADDR; |
| 661 | goto drop_packet; |
| 662 | } |
| 663 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 664 | u0->checksum = 0; |
| 665 | u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client); |
| 666 | sum0 = ip0->checksum; |
| 667 | old0 = ip0->dst_address.as_u32; |
| 668 | new0 = 0xFFFFFFFF; |
| 669 | ip0->dst_address.as_u32 = new0; |
| 670 | sum0 = ip_csum_update (sum0, old0, new0, |
| 671 | ip4_header_t /* structure */, |
| 672 | dst_address /* offset of changed member */); |
| 673 | ip0->checksum = ip_csum_fold (sum0); |
| 674 | |
| 675 | sum0 = ip0->checksum; |
| 676 | old0 = ip0->src_address.as_u32; |
| 677 | new0 = ia0->as_u32; |
| 678 | ip0->src_address.as_u32 = new0; |
| 679 | sum0 = ip_csum_update (sum0, old0, new0, |
| 680 | ip4_header_t /* structure */, |
| 681 | src_address /* offset of changed member */); |
| 682 | ip0->checksum = ip_csum_fold (sum0); |
| 683 | |
| 684 | vlib_buffer_advance (b0, -(sizeof(ethernet_header_t))); |
| 685 | si0 = vnet_get_sw_interface (vnm, original_sw_if_index); |
| 686 | if (si0->type == VNET_SW_INTERFACE_TYPE_SUB) |
| 687 | vlib_buffer_advance (b0, -4 /* space for VLAN tag */); |
| 688 | |
| 689 | mac0 = vlib_buffer_get_current (b0); |
| 690 | |
| 691 | hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index); |
| 692 | ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance); |
Damjan Marion | f1213b8 | 2016-03-13 02:22:06 +0100 | [diff] [blame] | 693 | clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 694 | memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address)); |
| 695 | mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ? |
| 696 | clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x0800); |
| 697 | |
| 698 | if (si0->type == VNET_SW_INTERFACE_TYPE_SUB) |
| 699 | { |
| 700 | u32 * vlan_tag = (u32 *)(mac0+1); |
| 701 | u32 tmp; |
| 702 | tmp = (si0->sub.id << 16) | 0x0800; |
| 703 | *vlan_tag = clib_host_to_net_u32 (tmp); |
| 704 | } |
| 705 | |
| 706 | /* $$$ This needs to be rewritten, for sure */ |
| 707 | f0 = vlib_get_frame_to_node (vm, hi0->output_node_index); |
| 708 | to_next0 = vlib_frame_vector_args (f0); |
| 709 | to_next0[0] = bi0; |
| 710 | f0->n_vectors = 1; |
| 711 | vlib_put_frame_to_node (vm, hi0->output_node_index, f0); |
| 712 | |
| 713 | do_trace: |
| 714 | if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 715 | { |
| 716 | dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node, |
| 717 | b0, sizeof (*tr)); |
| 718 | tr->which = 1; /* to client */ |
| 719 | tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0; |
| 720 | tr->error = error0; |
| 721 | tr->original_sw_if_index = original_sw_if_index; |
| 722 | tr->sw_if_index = sw_if_index; |
| 723 | } |
| 724 | } |
| 725 | return from_frame->n_vectors; |
| 726 | } |
| 727 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 728 | VLIB_REGISTER_NODE (dhcp_proxy_to_client_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 729 | .function = dhcp_proxy_to_client_input, |
| 730 | .name = "dhcp-proxy-to-client", |
| 731 | /* Takes a vector of packets. */ |
| 732 | .vector_size = sizeof (u32), |
| 733 | |
| 734 | .n_errors = DHCP_PROXY_N_ERROR, |
| 735 | .error_strings = dhcp_proxy_error_strings, |
| 736 | .format_buffer = format_dhcp_proxy_header_with_length, |
| 737 | .format_trace = format_dhcp_proxy_trace, |
| 738 | #if 0 |
| 739 | .unformat_buffer = unformat_dhcp_proxy_header, |
| 740 | #endif |
| 741 | }; |
| 742 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 743 | static clib_error_t * |
| 744 | dhcp4_proxy_init (vlib_main_t * vm) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 745 | { |
| 746 | dhcp_proxy_main_t * dm = &dhcp_proxy_main; |
| 747 | vlib_node_t * error_drop_node; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 748 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 749 | error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); |
| 750 | dm->error_drop_node_index = error_drop_node->index; |
| 751 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 752 | udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client, |
| 753 | dhcp_proxy_to_client_node.index, 1 /* is_ip4 */); |
| 754 | |
| 755 | udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server, |
| 756 | dhcp_proxy_to_server_node.index, 1 /* is_ip4 */); |
| 757 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 758 | return 0; |
| 759 | } |
| 760 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 761 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 762 | VLIB_INIT_FUNCTION (dhcp4_proxy_init); |
| 763 | |
| 764 | int |
| 765 | dhcp4_proxy_set_server (ip46_address_t *addr, |
| 766 | ip46_address_t *src_addr, |
| 767 | u32 rx_table_id, |
| 768 | u32 server_table_id, |
| 769 | int is_del) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 770 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 771 | u32 rx_fib_index = 0; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 772 | int rc = 0; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 773 | |
Neale Ranns | fca0c24 | 2017-01-13 07:57:46 -0800 | [diff] [blame] | 774 | const fib_prefix_t all_1s = |
| 775 | { |
| 776 | .fp_len = 32, |
| 777 | .fp_addr.ip4.as_u32 = 0xffffffff, |
| 778 | .fp_proto = FIB_PROTOCOL_IP4, |
| 779 | }; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 780 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 781 | if (ip46_address_is_zero(addr)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 782 | return VNET_API_ERROR_INVALID_DST_ADDRESS; |
| 783 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 784 | if (ip46_address_is_zero(src_addr)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 785 | return VNET_API_ERROR_INVALID_SRC_ADDRESS; |
| 786 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 787 | rx_fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 788 | rx_table_id); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 789 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 790 | if (is_del) |
| 791 | { |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 792 | if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index, |
| 793 | addr, server_table_id)) |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 794 | { |
| 795 | fib_table_entry_special_remove(rx_fib_index, |
| 796 | &all_1s, |
| 797 | FIB_SOURCE_DHCP); |
| 798 | fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4); |
| 799 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 800 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 801 | else |
| 802 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 803 | if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4, |
| 804 | addr, src_addr, |
| 805 | rx_fib_index, server_table_id)) |
| 806 | { |
| 807 | fib_table_entry_special_add(rx_fib_index, |
| 808 | &all_1s, |
| 809 | FIB_SOURCE_DHCP, |
| 810 | FIB_ENTRY_FLAG_LOCAL, |
| 811 | ADJ_INDEX_INVALID); |
| 812 | fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4); |
| 813 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 814 | } |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 815 | fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 816 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 817 | return (rc); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 818 | } |
| 819 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 820 | static clib_error_t * |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 821 | dhcp4_proxy_set_command_fn (vlib_main_t * vm, |
| 822 | unformat_input_t * input, |
| 823 | vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 824 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 825 | ip46_address_t server_addr, src_addr; |
| 826 | u32 server_table_id = 0, rx_table_id = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 827 | int is_del = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 828 | int set_src = 0, set_server = 0; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 829 | |
| 830 | memset(&server_addr, 0, sizeof(server_addr)); |
| 831 | memset(&src_addr, 0, sizeof(src_addr)); |
| 832 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 833 | while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) |
| 834 | { |
| 835 | if (unformat (input, "server %U", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 836 | unformat_ip4_address, &server_addr.ip4)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 837 | set_server = 1; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 838 | else if (unformat (input, "server-fib-id %d", &server_table_id)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 839 | ; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 840 | else if (unformat (input, "rx-fib-id %d", &rx_table_id)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 841 | ; |
| 842 | else if (unformat(input, "src-address %U", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 843 | unformat_ip4_address, &src_addr.ip4)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 844 | set_src = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 845 | else if (unformat (input, "delete") || |
| 846 | unformat (input, "del")) |
| 847 | is_del = 1; |
| 848 | else |
| 849 | break; |
| 850 | } |
| 851 | |
| 852 | if (is_del || (set_server && set_src)) |
| 853 | { |
| 854 | int rv; |
| 855 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 856 | rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id, |
| 857 | server_table_id, is_del); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 858 | switch (rv) |
| 859 | { |
| 860 | case 0: |
| 861 | return 0; |
| 862 | |
| 863 | case VNET_API_ERROR_INVALID_DST_ADDRESS: |
| 864 | return clib_error_return (0, "Invalid server address"); |
| 865 | |
| 866 | case VNET_API_ERROR_INVALID_SRC_ADDRESS: |
| 867 | return clib_error_return (0, "Invalid src address"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 868 | |
| 869 | case VNET_API_ERROR_NO_SUCH_ENTRY: |
| 870 | return clib_error_return |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 871 | (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 872 | |
| 873 | default: |
| 874 | return clib_error_return (0, "BUG: rv %d", rv); |
| 875 | } |
| 876 | } |
| 877 | else |
| 878 | return clib_error_return (0, "parse error`%U'", |
| 879 | format_unformat_error, input); |
| 880 | } |
| 881 | |
| 882 | VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = { |
| 883 | .path = "set dhcp proxy", |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 884 | .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 885 | .function = dhcp4_proxy_set_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 886 | }; |
| 887 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 888 | static u8 * |
| 889 | format_dhcp4_proxy_server (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 890 | { |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 891 | dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 892 | ip4_fib_t * rx_fib, * server_fib; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 893 | dhcp_server_t *server; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 894 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 895 | if (proxy == 0) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 896 | { |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 897 | s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address", |
| 898 | "Servers FIB,Address"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 899 | return s; |
| 900 | } |
| 901 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 902 | rx_fib = ip4_fib_get(proxy->rx_fib_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 903 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 904 | s = format (s, "%=14u%=16U", |
| 905 | rx_fib->table_id, |
| 906 | format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY); |
| 907 | |
| 908 | vec_foreach(server, proxy->dhcp_servers) |
| 909 | { |
| 910 | server_fib = ip4_fib_get(server->server_fib_index); |
| 911 | s = format (s, "%u,%U ", |
| 912 | server_fib->table_id, |
| 913 | format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY); |
| 914 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 915 | return s; |
| 916 | } |
| 917 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 918 | static int |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame^] | 919 | dhcp4_proxy_show_walk (dhcp_proxy_t *server, |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 920 | void *ctx) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 921 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 922 | vlib_main_t * vm = ctx; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 923 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 924 | vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 925 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 926 | return (1); |
| 927 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 928 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 929 | static clib_error_t * |
| 930 | dhcp4_proxy_show_command_fn (vlib_main_t * vm, |
| 931 | unformat_input_t * input, |
| 932 | vlib_cli_command_t * cmd) |
| 933 | { |
| 934 | vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, NULL /* header line */); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 935 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 936 | dhcp_proxy_walk(FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 937 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 938 | return (NULL); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = { |
| 942 | .path = "show dhcp proxy", |
| 943 | .short_help = "Display dhcp proxy server info", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 944 | .function = dhcp4_proxy_show_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 945 | }; |
| 946 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 947 | static clib_error_t * |
| 948 | dhcp_option_82_vss_fn (vlib_main_t * vm, |
| 949 | unformat_input_t * input, |
| 950 | vlib_cli_command_t * cmd) |
| 951 | { |
| 952 | int is_del = 0, got_new_vpn_id=0; |
| 953 | u32 oui=0, fib_id=0, tbl_id=~0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 954 | |
| 955 | while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) |
| 956 | { |
| 957 | |
| 958 | if (unformat(input, "delete") || unformat(input, "del")) |
| 959 | is_del = 1; |
| 960 | else if (unformat (input, "oui %d", &oui)) |
| 961 | got_new_vpn_id = 1; |
| 962 | else if (unformat (input, "vpn-id %d", &fib_id)) |
| 963 | got_new_vpn_id = 1; |
| 964 | else if (unformat (input, "table %d", &tbl_id)) |
| 965 | got_new_vpn_id = 1; |
| 966 | else |
| 967 | break; |
| 968 | } |
| 969 | if (tbl_id == ~0) |
| 970 | return clib_error_return (0, "no table ID specified."); |
| 971 | |
| 972 | if (is_del || got_new_vpn_id) |
| 973 | { |
| 974 | int rv; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 975 | rv = dhcp_proxy_set_vss(FIB_PROTOCOL_IP4, tbl_id, oui, fib_id, is_del); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 976 | switch (rv) |
| 977 | { |
| 978 | case 0: |
| 979 | return 0; |
| 980 | |
| 981 | case VNET_API_ERROR_NO_SUCH_FIB: |
| 982 | return clib_error_return (0, "option 82 vss(oui:%d, vpn-id:%d) not found in table %d", |
| 983 | oui, fib_id, tbl_id); |
| 984 | |
| 985 | case VNET_API_ERROR_NO_SUCH_ENTRY: |
| 986 | return clib_error_return (0, "option 82 vss for table %d not found in in pool.", |
| 987 | tbl_id); |
| 988 | default: |
| 989 | return clib_error_return (0, "BUG: rv %d", rv); |
| 990 | } |
| 991 | } |
| 992 | else |
| 993 | return clib_error_return (0, "parse error`%U'", |
| 994 | format_unformat_error, input); |
| 995 | } |
| 996 | |
| 997 | VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = { |
| 998 | .path = "set dhcp option-82 vss", |
| 999 | .short_help = "set dhcp option-82 vss [del] table <table id> oui <oui> vpn-id <vpn-id>", |
| 1000 | .function = dhcp_option_82_vss_fn, |
| 1001 | }; |
| 1002 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1003 | static clib_error_t * |
| 1004 | dhcp_vss_show_command_fn (vlib_main_t * vm, |
| 1005 | unformat_input_t * input, |
| 1006 | vlib_cli_command_t * cmd) |
| 1007 | |
| 1008 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1009 | dhcp_vss_walk(FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 1010 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1011 | return (NULL); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = { |
| 1015 | .path = "show dhcp vss", |
| 1016 | .short_help = "show dhcp VSS", |
| 1017 | .function = dhcp_vss_show_command_fn, |
| 1018 | }; |
| 1019 | |
| 1020 | static clib_error_t * |
| 1021 | dhcp_option_82_address_show_command_fn (vlib_main_t * vm, |
| 1022 | unformat_input_t * input, |
| 1023 | vlib_cli_command_t * cmd) |
| 1024 | |
| 1025 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1026 | vnet_main_t *vnm = vnet_get_main(); |
| 1027 | u32 sw_if_index0=0, sw_if_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1028 | vnet_sw_interface_t *swif; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1029 | ip4_address_t *ia0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1030 | |
| 1031 | while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) |
| 1032 | { |
| 1033 | |
| 1034 | if (unformat(input, "%U", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1035 | unformat_vnet_sw_interface, vnm, &sw_if_index0)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1036 | { |
| 1037 | swif = vnet_get_sw_interface (vnm, sw_if_index0); |
| 1038 | sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ? |
| 1039 | swif->unnumbered_sw_if_index : sw_if_index0; |
Dave Barach | 203c632 | 2016-06-26 10:29:03 -0400 | [diff] [blame] | 1040 | ia0 = ip4_interface_first_address(&ip4_main, sw_if_index, 0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1041 | if (ia0) |
| 1042 | { |
| 1043 | vlib_cli_output (vm, "%=20s%=20s", "interface", |
| 1044 | "source IP address"); |
| 1045 | |
| 1046 | vlib_cli_output (vm, "%=20U%=20U", |
| 1047 | format_vnet_sw_if_index_name, |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1048 | vnm, sw_if_index0, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1049 | format_ip4_address, ia0); |
| 1050 | } |
| 1051 | else |
| 1052 | vlib_cli_output (vm, "%=34s %=20U", |
| 1053 | "No IPv4 address configured on", |
| 1054 | format_vnet_sw_if_index_name, |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1055 | vnm, sw_if_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1056 | } |
| 1057 | else |
| 1058 | break; |
| 1059 | } |
| 1060 | |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = { |
| 1065 | .path = "show dhcp option-82-address interface", |
| 1066 | .short_help = "show dhcp option-82-address interface <interface>", |
| 1067 | .function = dhcp_option_82_address_show_command_fn, |
| 1068 | }; |