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 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 24 | static char *dhcp_proxy_error_strings[] = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 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 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 35 | typedef enum |
| 36 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 37 | #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s, |
| 38 | foreach_dhcp_proxy_to_server_input_next |
| 39 | #undef _ |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 40 | DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 41 | } dhcp_proxy_to_server_input_next_t; |
| 42 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 43 | typedef struct |
| 44 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 45 | /* 0 => to server, 1 => to client */ |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 46 | int which; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 47 | ip4_address_t trace_ip4_address; |
| 48 | u32 error; |
| 49 | u32 sw_if_index; |
| 50 | u32 original_sw_if_index; |
| 51 | } dhcp_proxy_trace_t; |
| 52 | |
| 53 | #define VPP_DHCP_OPTION82_SUB1_SIZE 6 |
| 54 | #define VPP_DHCP_OPTION82_SUB5_SIZE 6 |
| 55 | #define VPP_DHCP_OPTION82_VSS_SIZE 12 |
| 56 | #define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \ |
| 57 | VPP_DHCP_OPTION82_SUB5_SIZE + \ |
| 58 | VPP_DHCP_OPTION82_VSS_SIZE +3) |
| 59 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 60 | static vlib_node_registration_t dhcp_proxy_to_server_node; |
| 61 | static vlib_node_registration_t dhcp_proxy_to_client_node; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 62 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 63 | static u8 * |
| 64 | format_dhcp_proxy_trace (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 65 | { |
| 66 | CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| 67 | CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 68 | dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *); |
| 69 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 70 | if (t->which == 0) |
| 71 | s = format (s, "DHCP proxy: sent to server %U\n", |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 72 | format_ip4_address, &t->trace_ip4_address, t->error); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 73 | else |
| 74 | s = format (s, "DHCP proxy: broadcast to client from %U\n", |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 75 | format_ip4_address, &t->trace_ip4_address); |
| 76 | |
| 77 | if (t->error != (u32) ~ 0) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 78 | s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]); |
| 79 | |
| 80 | s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n", |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 81 | t->original_sw_if_index, t->sw_if_index); |
| 82 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 83 | return s; |
| 84 | } |
| 85 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 86 | static u8 * |
| 87 | format_dhcp_proxy_header_with_length (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 88 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 89 | dhcp_header_t *h = va_arg (*args, dhcp_header_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 90 | u32 max_header_bytes = va_arg (*args, u32); |
| 91 | u32 header_bytes; |
| 92 | |
| 93 | header_bytes = sizeof (h[0]); |
| 94 | if (max_header_bytes != 0 && header_bytes > max_header_bytes) |
| 95 | return format (s, "dhcp header truncated"); |
| 96 | |
| 97 | s = format (s, "DHCP Proxy"); |
| 98 | |
| 99 | return s; |
| 100 | } |
| 101 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 102 | static uword |
| 103 | dhcp_proxy_to_server_input (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 104 | vlib_node_runtime_t * node, |
| 105 | vlib_frame_t * from_frame) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 106 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 107 | u32 n_left_from, next_index, *from, *to_next; |
| 108 | dhcp_proxy_main_t *dpm = &dhcp_proxy_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 109 | from = vlib_frame_vector_args (from_frame); |
| 110 | n_left_from = from_frame->n_vectors; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 111 | u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0; |
| 112 | u32 pkts_no_interface_address = 0; |
| 113 | u32 pkts_too_big = 0; |
| 114 | ip4_main_t *im = &ip4_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 115 | |
| 116 | next_index = node->cached_next_index; |
| 117 | |
| 118 | while (n_left_from > 0) |
| 119 | { |
| 120 | u32 n_left_to_next; |
| 121 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 122 | 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] | 123 | |
| 124 | while (n_left_from > 0 && n_left_to_next > 0) |
| 125 | { |
| 126 | u32 bi0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 127 | vlib_buffer_t *b0; |
| 128 | udp_header_t *u0; |
| 129 | dhcp_header_t *h0; |
| 130 | ip4_header_t *ip0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 131 | u32 next0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 132 | u32 old0, new0; |
| 133 | ip_csum_t sum0; |
| 134 | u32 error0 = (u32) ~ 0; |
| 135 | u32 sw_if_index = 0; |
| 136 | u32 original_sw_if_index = 0; |
| 137 | u8 *end = NULL; |
| 138 | u32 fib_index; |
| 139 | dhcp_proxy_t *proxy; |
| 140 | dhcp_server_t *server; |
| 141 | u32 rx_sw_if_index; |
| 142 | dhcp_option_t *o; |
| 143 | u32 len = 0; |
| 144 | vlib_buffer_free_list_t *fl; |
| 145 | u8 is_discover = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 146 | |
| 147 | bi0 = from[0]; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 148 | from += 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 149 | n_left_from -= 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 150 | |
| 151 | b0 = vlib_get_buffer (vm, bi0); |
| 152 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 153 | h0 = vlib_buffer_get_current (b0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 154 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 155 | /* |
| 156 | * udp_local hands us the DHCP header, need udp hdr, |
| 157 | * ip hdr to relay to server |
| 158 | */ |
| 159 | vlib_buffer_advance (b0, -(sizeof (*u0))); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 160 | u0 = vlib_buffer_get_current (b0); |
| 161 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 162 | /* This blows. Return traffic has src_port = 67, dst_port = 67 */ |
| 163 | if (u0->src_port == |
| 164 | clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server)) |
| 165 | { |
| 166 | vlib_buffer_advance (b0, sizeof (*u0)); |
| 167 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT; |
| 168 | error0 = 0; |
| 169 | pkts_to_client++; |
| 170 | goto do_enqueue; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 171 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 172 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 173 | rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| 174 | |
| 175 | fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index]; |
| 176 | proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4); |
| 177 | |
| 178 | if (PREDICT_FALSE (NULL == proxy)) |
| 179 | { |
| 180 | error0 = DHCP_PROXY_ERROR_NO_SERVER; |
| 181 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
| 182 | pkts_no_server++; |
| 183 | goto do_trace; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 184 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 185 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 186 | server = &proxy->dhcp_servers[0]; |
| 187 | vlib_buffer_advance (b0, -(sizeof (*ip0))); |
| 188 | ip0 = vlib_buffer_get_current (b0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 189 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 190 | /* disable UDP checksum */ |
| 191 | u0->checksum = 0; |
| 192 | sum0 = ip0->checksum; |
| 193 | old0 = ip0->dst_address.as_u32; |
| 194 | new0 = server->dhcp_server.ip4.as_u32; |
| 195 | ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; |
| 196 | sum0 = ip_csum_update (sum0, old0, new0, |
| 197 | ip4_header_t /* structure */ , |
| 198 | dst_address /* changed member */ ); |
| 199 | ip0->checksum = ip_csum_fold (sum0); |
| 200 | |
| 201 | sum0 = ip0->checksum; |
| 202 | old0 = ip0->src_address.as_u32; |
| 203 | new0 = proxy->dhcp_src_address.ip4.as_u32; |
| 204 | ip0->src_address.as_u32 = new0; |
| 205 | sum0 = ip_csum_update (sum0, old0, new0, |
| 206 | ip4_header_t /* structure */ , |
| 207 | src_address /* changed member */ ); |
| 208 | ip0->checksum = ip_csum_fold (sum0); |
| 209 | |
| 210 | /* Send to DHCP server via the configured FIB */ |
| 211 | vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index; |
| 212 | |
| 213 | h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32; |
| 214 | pkts_to_server++; |
| 215 | |
| 216 | o = (dhcp_option_t *) h0->options; |
| 217 | |
| 218 | fib_index = im->fib_index_by_sw_if_index |
| 219 | [vnet_buffer (b0)->sw_if_index[VLIB_RX]]; |
| 220 | |
| 221 | end = b0->data + b0->current_data + b0->current_length; |
| 222 | /* TLVs are not performance-friendly... */ |
| 223 | while (o->option != 0xFF /* end of options */ && (u8 *) o < end) |
| 224 | { |
| 225 | if (DHCP_PACKET_OPTION_MSG_TYPE == o->option) |
| 226 | { |
| 227 | if (DHCP_PACKET_DISCOVER == o->data[0]) |
| 228 | { |
| 229 | is_discover = 1; |
| 230 | } |
| 231 | } |
| 232 | o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); |
| 233 | } |
| 234 | |
| 235 | fl = |
| 236 | vlib_buffer_get_free_list (vm, |
| 237 | vlib_buffer_get_free_list_index (b0)); |
| 238 | // start write at (option*)o, some packets have padding |
| 239 | if (((u8 *) o - (u8 *) b0->data + VPP_DHCP_OPTION82_SIZE) > |
| 240 | fl->n_data_bytes) |
| 241 | { |
| 242 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
| 243 | pkts_too_big++; |
| 244 | goto do_trace; |
| 245 | } |
| 246 | |
| 247 | if ((o->option == 0xFF) && ((u8 *) o <= end)) |
| 248 | { |
| 249 | vnet_main_t *vnm = vnet_get_main (); |
| 250 | u16 old_l0, new_l0; |
| 251 | ip4_address_t _ia0, *ia0 = &_ia0; |
| 252 | dhcp_vss_t *vss; |
| 253 | vnet_sw_interface_t *swif; |
| 254 | sw_if_index = 0; |
| 255 | original_sw_if_index = 0; |
| 256 | |
| 257 | original_sw_if_index = sw_if_index = |
| 258 | vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| 259 | swif = vnet_get_sw_interface (vnm, sw_if_index); |
| 260 | if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) |
| 261 | sw_if_index = swif->unnumbered_sw_if_index; |
| 262 | |
| 263 | /* |
| 264 | * Get the first ip4 address on the [client-side] |
| 265 | * RX interface, if not unnumbered. otherwise use |
| 266 | * the loopback interface's ip address. |
| 267 | */ |
| 268 | ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); |
| 269 | |
| 270 | if (ia0 == 0) |
| 271 | { |
| 272 | error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; |
| 273 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; |
| 274 | pkts_no_interface_address++; |
| 275 | goto do_trace; |
| 276 | } |
| 277 | |
| 278 | /* Add option 82 */ |
| 279 | o->option = 82; /* option 82 */ |
| 280 | o->length = 12; /* 12 octets to follow */ |
| 281 | o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */ |
| 282 | o->data[1] = 4; /* length of suboption */ |
| 283 | u32 *o_ifid = (u32 *) & o->data[2]; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 284 | *o_ifid = clib_host_to_net_u32 (original_sw_if_index); |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 285 | o->data[6] = 5; /* suboption 5 (client RX intfc address) */ |
| 286 | o->data[7] = 4; /* length 4 */ |
| 287 | u32 *o_addr = (u32 *) & o->data[8]; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 288 | *o_addr = ia0->as_u32; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 289 | o->data[12] = 0xFF; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 290 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 291 | vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4); |
| 292 | if (vss) |
| 293 | { |
| 294 | u32 id_len; /* length of VPN ID */ |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 295 | |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 296 | if (vss->vss_type == VSS_TYPE_VPN_ID) |
| 297 | { |
| 298 | id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */ |
| 299 | memcpy (&o->data[15], vss->vpn_id, id_len); |
| 300 | } |
| 301 | else if (vss->vss_type == VSS_TYPE_ASCII) |
| 302 | { |
| 303 | id_len = vec_len (vss->vpn_ascii_id); |
| 304 | memcpy (&o->data[15], vss->vpn_ascii_id, id_len); |
| 305 | } |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 306 | else /* must be VSS_TYPE_DEFAULT, no VPN ID */ |
| 307 | id_len = 0; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 308 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 309 | o->data[12] = 151; /* vss suboption */ |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 310 | o->data[13] = id_len + 1; /* length: vss_type + id_len */ |
| 311 | o->data[14] = vss->vss_type; /* vss option type */ |
| 312 | o->data[15 + id_len] = 152; /* vss control suboption */ |
| 313 | o->data[16 + id_len] = 0; /* length */ |
| 314 | o->data[17 + id_len] = 0xFF; /* "end-of-options" (0xFF) */ |
| 315 | /* 5 bytes for suboption headers 151+len, 152+len and 0xFF */ |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 316 | o->length += id_len + 5; |
| 317 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 318 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 319 | len = o->length + 3; |
| 320 | b0->current_length += len; |
| 321 | /* Fix IP header length and checksum */ |
| 322 | old_l0 = ip0->length; |
| 323 | new_l0 = clib_net_to_host_u16 (old_l0); |
| 324 | new_l0 += len; |
| 325 | new_l0 = clib_host_to_net_u16 (new_l0); |
| 326 | ip0->length = new_l0; |
| 327 | sum0 = ip0->checksum; |
| 328 | sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, |
| 329 | length /* changed member */ ); |
| 330 | ip0->checksum = ip_csum_fold (sum0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 331 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 332 | /* Fix UDP length */ |
| 333 | new_l0 = clib_net_to_host_u16 (u0->length); |
| 334 | new_l0 += len; |
| 335 | u0->length = clib_host_to_net_u16 (new_l0); |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 336 | } |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 337 | else |
| 338 | { |
| 339 | vlib_node_increment_counter |
| 340 | (vm, dhcp_proxy_to_server_node.index, |
| 341 | DHCP_PROXY_ERROR_OPTION_82_ERROR, 1); |
| 342 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 343 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 344 | next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 345 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 346 | /* |
| 347 | * If we have multiple servers configured and this is the |
| 348 | * client's discover message, then send copies to each of |
| 349 | * those servers |
| 350 | */ |
| 351 | if (is_discover && vec_len (proxy->dhcp_servers) > 1) |
| 352 | { |
| 353 | u32 ii; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 354 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 355 | for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++) |
| 356 | { |
| 357 | vlib_buffer_t *c0; |
| 358 | u32 ci0; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 359 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 360 | c0 = vlib_buffer_copy (vm, b0); |
| 361 | ci0 = vlib_get_buffer_index (vm, c0); |
| 362 | server = &proxy->dhcp_servers[ii]; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 363 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 364 | ip0 = vlib_buffer_get_current (c0); |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 365 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 366 | sum0 = ip0->checksum; |
| 367 | old0 = ip0->dst_address.as_u32; |
| 368 | new0 = server->dhcp_server.ip4.as_u32; |
| 369 | ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; |
| 370 | sum0 = ip_csum_update (sum0, old0, new0, |
| 371 | ip4_header_t /* structure */ , |
| 372 | dst_address /* changed member */ ); |
| 373 | ip0->checksum = ip_csum_fold (sum0); |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 374 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 375 | to_next[0] = ci0; |
| 376 | to_next += 1; |
| 377 | n_left_to_next -= 1; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 378 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 379 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 380 | to_next, n_left_to_next, |
| 381 | ci0, next0); |
| 382 | |
| 383 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 384 | { |
| 385 | dhcp_proxy_trace_t *tr; |
| 386 | |
| 387 | tr = vlib_add_trace (vm, node, c0, sizeof (*tr)); |
| 388 | tr->which = 0; /* to server */ |
| 389 | tr->error = error0; |
| 390 | tr->original_sw_if_index = original_sw_if_index; |
| 391 | tr->sw_if_index = sw_if_index; |
| 392 | if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) |
| 393 | tr->trace_ip4_address.as_u32 = |
| 394 | server->dhcp_server.ip4.as_u32; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 395 | } |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 396 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 397 | if (PREDICT_FALSE (0 == n_left_to_next)) |
| 398 | { |
| 399 | vlib_put_next_frame (vm, node, next_index, |
| 400 | n_left_to_next); |
| 401 | vlib_get_next_frame (vm, node, next_index, |
| 402 | to_next, n_left_to_next); |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | do_trace: |
| 407 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 408 | { |
| 409 | dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node, |
| 410 | b0, sizeof (*tr)); |
| 411 | tr->which = 0; /* to server */ |
| 412 | tr->error = error0; |
| 413 | tr->original_sw_if_index = original_sw_if_index; |
| 414 | tr->sw_if_index = sw_if_index; |
| 415 | if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) |
| 416 | tr->trace_ip4_address.as_u32 = |
| 417 | proxy->dhcp_servers[0].dhcp_server.ip4.as_u32; |
| 418 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 419 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 420 | do_enqueue: |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 421 | to_next[0] = bi0; |
| 422 | to_next += 1; |
| 423 | n_left_to_next -= 1; |
| 424 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 425 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 426 | to_next, n_left_to_next, |
| 427 | bi0, next0); |
| 428 | } |
| 429 | |
| 430 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 431 | } |
| 432 | |
| 433 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 434 | DHCP_PROXY_ERROR_RELAY_TO_CLIENT, |
| 435 | pkts_to_client); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 436 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 437 | DHCP_PROXY_ERROR_RELAY_TO_SERVER, |
| 438 | pkts_to_server); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 439 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 440 | DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 441 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 442 | DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS, |
| 443 | pkts_no_interface_address); |
| 444 | vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, |
| 445 | DHCP_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 446 | return from_frame->n_vectors; |
| 447 | } |
| 448 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 449 | /* *INDENT-OFF* */ |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 450 | VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 451 | .function = dhcp_proxy_to_server_input, |
| 452 | .name = "dhcp-proxy-to-server", |
| 453 | /* Takes a vector of packets. */ |
| 454 | .vector_size = sizeof (u32), |
| 455 | |
| 456 | .n_errors = DHCP_PROXY_N_ERROR, |
| 457 | .error_strings = dhcp_proxy_error_strings, |
| 458 | |
| 459 | .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, |
| 460 | .next_nodes = { |
| 461 | #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n, |
| 462 | foreach_dhcp_proxy_to_server_input_next |
| 463 | #undef _ |
| 464 | }, |
| 465 | |
| 466 | .format_buffer = format_dhcp_proxy_header_with_length, |
| 467 | .format_trace = format_dhcp_proxy_trace, |
| 468 | #if 0 |
| 469 | .unformat_buffer = unformat_dhcp_proxy_header, |
| 470 | #endif |
| 471 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 472 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 473 | |
| 474 | static uword |
| 475 | dhcp_proxy_to_client_input (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 476 | vlib_node_runtime_t * node, |
| 477 | vlib_frame_t * from_frame) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 478 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 479 | u32 n_left_from, *from; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 480 | ethernet_main_t *em = ethernet_get_main (vm); |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 481 | dhcp_proxy_main_t *dpm = &dhcp_proxy_main; |
| 482 | vnet_main_t *vnm = vnet_get_main (); |
| 483 | ip4_main_t *im = &ip4_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 484 | |
| 485 | from = vlib_frame_vector_args (from_frame); |
| 486 | n_left_from = from_frame->n_vectors; |
| 487 | |
| 488 | while (n_left_from > 0) |
| 489 | { |
| 490 | u32 bi0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 491 | vlib_buffer_t *b0; |
| 492 | udp_header_t *u0; |
| 493 | dhcp_header_t *h0; |
| 494 | ip4_header_t *ip0 = 0; |
| 495 | ip4_address_t *ia0 = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 496 | u32 old0, new0; |
| 497 | ip_csum_t sum0; |
| 498 | ethernet_interface_t *ei0; |
| 499 | ethernet_header_t *mac0; |
| 500 | vnet_hw_interface_t *hi0; |
| 501 | vlib_frame_t *f0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 502 | u32 *to_next0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 503 | u32 sw_if_index = ~0; |
| 504 | vnet_sw_interface_t *si0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 505 | u32 error0 = (u32) ~ 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 506 | vnet_sw_interface_t *swif; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 507 | u32 fib_index; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 508 | dhcp_proxy_t *proxy; |
| 509 | dhcp_server_t *server; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 510 | u32 original_sw_if_index = (u32) ~ 0; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 511 | ip4_address_t relay_addr = { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 512 | .as_u32 = 0, |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 513 | }; |
| 514 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 515 | bi0 = from[0]; |
| 516 | from += 1; |
| 517 | n_left_from -= 1; |
| 518 | |
| 519 | b0 = vlib_get_buffer (vm, bi0); |
| 520 | h0 = vlib_buffer_get_current (b0); |
| 521 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 522 | /* |
| 523 | * udp_local hands us the DHCP header, need udp hdr, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 524 | * ip hdr to relay to client |
| 525 | */ |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 526 | vlib_buffer_advance (b0, -(sizeof (*u0))); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 527 | u0 = vlib_buffer_get_current (b0); |
| 528 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 529 | vlib_buffer_advance (b0, -(sizeof (*ip0))); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 530 | ip0 = vlib_buffer_get_current (b0); |
| 531 | |
| 532 | /* Consumed by dhcp client code? */ |
| 533 | if (dhcp_client_for_us (bi0, b0, ip0, u0, h0)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 534 | continue; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 535 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 536 | if (1 /* dpm->insert_option_82 */ ) |
| 537 | { |
| 538 | dhcp_option_t *o = (dhcp_option_t *) h0->options; |
| 539 | dhcp_option_t *sub; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 540 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 541 | /* Parse through TLVs looking for option 82. |
| 542 | The circuit-ID is the FIB number we need |
| 543 | to track down the client-facing interface */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 544 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 545 | while (o->option != 0xFF /* end of options */ && |
| 546 | (u8 *) o < |
| 547 | (b0->data + b0->current_data + b0->current_length)) |
| 548 | { |
| 549 | if (o->option == 82) |
| 550 | { |
| 551 | u32 vss_exist = 0; |
| 552 | u32 vss_ctrl = 0; |
| 553 | sub = (dhcp_option_t *) & o->data[0]; |
| 554 | while (sub->option != 0xFF /* end of options */ && |
| 555 | (u8 *) sub < (u8 *) (o + o->length)) |
| 556 | { |
| 557 | /* If this is one of ours, it will have |
| 558 | total length 12, circuit-id suboption type, |
| 559 | and the sw_if_index */ |
| 560 | if (sub->option == 1 && sub->length == 4) |
| 561 | { |
| 562 | sw_if_index = ((sub->data[0] << 24) | |
| 563 | (sub->data[1] << 16) | |
| 564 | (sub->data[2] << 8) | |
| 565 | (sub->data[3])); |
| 566 | } |
| 567 | else if (sub->option == 5 && sub->length == 4) |
| 568 | { |
| 569 | relay_addr.as_u8[0] = sub->data[0]; |
| 570 | relay_addr.as_u8[1] = sub->data[1]; |
| 571 | relay_addr.as_u8[2] = sub->data[2]; |
| 572 | relay_addr.as_u8[3] = sub->data[3]; |
| 573 | } |
| 574 | else if (sub->option == 151 && |
| 575 | sub->length == 7 && sub->data[0] == 1) |
| 576 | vss_exist = 1; |
| 577 | else if (sub->option == 152 && sub->length == 0) |
| 578 | vss_ctrl = 1; |
| 579 | sub = (dhcp_option_t *) |
| 580 | (((uword) sub) + (sub->length + 2)); |
| 581 | } |
| 582 | if (vss_ctrl && vss_exist) |
| 583 | vlib_node_increment_counter |
| 584 | (vm, dhcp_proxy_to_client_node.index, |
| 585 | DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 586 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 587 | } |
| 588 | o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | if (sw_if_index == (u32) ~ 0) |
| 593 | { |
| 594 | error0 = DHCP_PROXY_ERROR_NO_OPTION_82; |
| 595 | |
| 596 | drop_packet: |
| 597 | vlib_node_increment_counter (vm, dhcp_proxy_to_client_node.index, |
| 598 | error0, 1); |
| 599 | f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index); |
| 600 | to_next0 = vlib_frame_vector_args (f0); |
| 601 | to_next0[0] = bi0; |
| 602 | f0->n_vectors = 1; |
| 603 | vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0); |
| 604 | goto do_trace; |
| 605 | } |
| 606 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 607 | if (relay_addr.as_u32 == 0) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 608 | { |
| 609 | error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR; |
| 610 | goto drop_packet; |
| 611 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 612 | |
| 613 | if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 614 | { |
| 615 | error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF; |
| 616 | goto drop_packet; |
| 617 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 618 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 619 | fib_index = im->fib_index_by_sw_if_index[sw_if_index]; |
| 620 | proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 621 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 622 | if (PREDICT_FALSE (NULL == proxy)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 623 | { |
| 624 | error0 = DHCP_PROXY_ERROR_NO_SERVER; |
| 625 | goto drop_packet; |
| 626 | } |
| 627 | |
| 628 | vec_foreach (server, proxy->dhcp_servers) |
| 629 | { |
| 630 | if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32) |
| 631 | { |
| 632 | goto server_found; |
| 633 | } |
| 634 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 635 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 636 | error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS; |
| 637 | goto drop_packet; |
| 638 | |
| 639 | server_found: |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 640 | vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index; |
| 641 | |
| 642 | swif = vnet_get_sw_interface (vnm, sw_if_index); |
| 643 | original_sw_if_index = sw_if_index; |
| 644 | if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 645 | sw_if_index = swif->unnumbered_sw_if_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 646 | |
Dave Barach | 203c632 | 2016-06-26 10:29:03 -0400 | [diff] [blame] | 647 | ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 648 | if (ia0 == 0) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 649 | { |
| 650 | error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; |
| 651 | goto drop_packet; |
| 652 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 653 | |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 654 | if (relay_addr.as_u32 != ia0->as_u32) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 655 | { |
| 656 | error0 = DHCP_PROXY_ERROR_BAD_YIADDR; |
| 657 | goto drop_packet; |
| 658 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 659 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 660 | u0->checksum = 0; |
| 661 | u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client); |
| 662 | sum0 = ip0->checksum; |
| 663 | old0 = ip0->dst_address.as_u32; |
| 664 | new0 = 0xFFFFFFFF; |
| 665 | ip0->dst_address.as_u32 = new0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 666 | sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ , |
| 667 | dst_address /* offset of changed member */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 668 | ip0->checksum = ip_csum_fold (sum0); |
| 669 | |
| 670 | sum0 = ip0->checksum; |
| 671 | old0 = ip0->src_address.as_u32; |
| 672 | new0 = ia0->as_u32; |
| 673 | ip0->src_address.as_u32 = new0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 674 | sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ , |
| 675 | src_address /* offset of changed member */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 676 | ip0->checksum = ip_csum_fold (sum0); |
| 677 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 678 | vlib_buffer_advance (b0, -(sizeof (ethernet_header_t))); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 679 | si0 = vnet_get_sw_interface (vnm, original_sw_if_index); |
| 680 | if (si0->type == VNET_SW_INTERFACE_TYPE_SUB) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 681 | vlib_buffer_advance (b0, -4 /* space for VLAN tag */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 682 | |
| 683 | mac0 = vlib_buffer_get_current (b0); |
| 684 | |
| 685 | hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index); |
| 686 | ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance); |
Damjan Marion | f1213b8 | 2016-03-13 02:22:06 +0100 | [diff] [blame] | 687 | clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address)); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 688 | memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address)); |
| 689 | mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ? |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 690 | clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x0800); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 691 | |
| 692 | if (si0->type == VNET_SW_INTERFACE_TYPE_SUB) |
| 693 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 694 | u32 *vlan_tag = (u32 *) (mac0 + 1); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 695 | u32 tmp; |
| 696 | tmp = (si0->sub.id << 16) | 0x0800; |
| 697 | *vlan_tag = clib_host_to_net_u32 (tmp); |
| 698 | } |
| 699 | |
| 700 | /* $$$ This needs to be rewritten, for sure */ |
| 701 | f0 = vlib_get_frame_to_node (vm, hi0->output_node_index); |
| 702 | to_next0 = vlib_frame_vector_args (f0); |
| 703 | to_next0[0] = bi0; |
| 704 | f0->n_vectors = 1; |
| 705 | vlib_put_frame_to_node (vm, hi0->output_node_index, f0); |
| 706 | |
| 707 | do_trace: |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 708 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 709 | { |
| 710 | dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node, |
| 711 | b0, sizeof (*tr)); |
| 712 | tr->which = 1; /* to client */ |
| 713 | tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0; |
| 714 | tr->error = error0; |
| 715 | tr->original_sw_if_index = original_sw_if_index; |
| 716 | tr->sw_if_index = sw_if_index; |
| 717 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 718 | } |
| 719 | return from_frame->n_vectors; |
| 720 | } |
| 721 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 722 | /* *INDENT-OFF* */ |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 723 | VLIB_REGISTER_NODE (dhcp_proxy_to_client_node, static) = { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 724 | .function = dhcp_proxy_to_client_input, |
| 725 | .name = "dhcp-proxy-to-client", |
| 726 | /* Takes a vector of packets. */ |
| 727 | .vector_size = sizeof (u32), |
| 728 | |
| 729 | .n_errors = DHCP_PROXY_N_ERROR, |
| 730 | .error_strings = dhcp_proxy_error_strings, |
| 731 | .format_buffer = format_dhcp_proxy_header_with_length, |
| 732 | .format_trace = format_dhcp_proxy_trace, |
| 733 | #if 0 |
| 734 | .unformat_buffer = unformat_dhcp_proxy_header, |
| 735 | #endif |
| 736 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 737 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 738 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 739 | static clib_error_t * |
| 740 | dhcp4_proxy_init (vlib_main_t * vm) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 741 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 742 | dhcp_proxy_main_t *dm = &dhcp_proxy_main; |
| 743 | vlib_node_t *error_drop_node; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 744 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 745 | error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); |
| 746 | dm->error_drop_node_index = error_drop_node->index; |
| 747 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 748 | udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client, |
| 749 | dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 750 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 751 | udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server, |
| 752 | dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ ); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 753 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 754 | return 0; |
| 755 | } |
| 756 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 757 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 758 | VLIB_INIT_FUNCTION (dhcp4_proxy_init); |
| 759 | |
| 760 | int |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 761 | dhcp4_proxy_set_server (ip46_address_t * addr, |
| 762 | ip46_address_t * src_addr, |
| 763 | u32 rx_table_id, u32 server_table_id, int is_del) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 764 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 765 | u32 rx_fib_index = 0; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 766 | int rc = 0; |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 767 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 768 | const fib_prefix_t all_1s = { |
| 769 | .fp_len = 32, |
| 770 | .fp_addr.ip4.as_u32 = 0xffffffff, |
| 771 | .fp_proto = FIB_PROTOCOL_IP4, |
Neale Ranns | fca0c24 | 2017-01-13 07:57:46 -0800 | [diff] [blame] | 772 | }; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 773 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 774 | if (ip46_address_is_zero (addr)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 775 | return VNET_API_ERROR_INVALID_DST_ADDRESS; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 776 | |
| 777 | if (ip46_address_is_zero (src_addr)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 778 | return VNET_API_ERROR_INVALID_SRC_ADDRESS; |
| 779 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 780 | rx_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, |
| 781 | rx_table_id, |
| 782 | FIB_SOURCE_DHCP); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 783 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 784 | if (is_del) |
| 785 | { |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 786 | if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 787 | addr, server_table_id)) |
| 788 | { |
| 789 | fib_table_entry_special_remove (rx_fib_index, |
| 790 | &all_1s, FIB_SOURCE_DHCP); |
| 791 | fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); |
| 792 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 793 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 794 | else |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 795 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 796 | if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 797 | addr, src_addr, |
| 798 | rx_fib_index, server_table_id)) |
| 799 | { |
| 800 | fib_table_entry_special_add (rx_fib_index, |
| 801 | &all_1s, |
| 802 | FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_LOCAL); |
| 803 | fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); |
| 804 | } |
| 805 | } |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 806 | fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 807 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 808 | return (rc); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 809 | } |
| 810 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 811 | static clib_error_t * |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 812 | dhcp4_proxy_set_command_fn (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 813 | unformat_input_t * input, |
| 814 | vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 815 | { |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 816 | ip46_address_t server_addr, src_addr; |
| 817 | u32 server_table_id = 0, rx_table_id = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 818 | int is_del = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 819 | int set_src = 0, set_server = 0; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 820 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 821 | memset (&server_addr, 0, sizeof (server_addr)); |
| 822 | memset (&src_addr, 0, sizeof (src_addr)); |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 823 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 824 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 825 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 826 | if (unformat (input, "server %U", |
| 827 | unformat_ip4_address, &server_addr.ip4)) |
| 828 | set_server = 1; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 829 | else if (unformat (input, "server-fib-id %d", &server_table_id)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 830 | ; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 831 | else if (unformat (input, "rx-fib-id %d", &rx_table_id)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 832 | ; |
| 833 | else if (unformat (input, "src-address %U", |
| 834 | unformat_ip4_address, &src_addr.ip4)) |
| 835 | set_src = 1; |
| 836 | else if (unformat (input, "delete") || unformat (input, "del")) |
| 837 | is_del = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 838 | else |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 839 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | if (is_del || (set_server && set_src)) |
| 843 | { |
| 844 | int rv; |
| 845 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 846 | rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id, |
| 847 | server_table_id, is_del); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 848 | switch (rv) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 849 | { |
| 850 | case 0: |
| 851 | return 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 852 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 853 | case VNET_API_ERROR_INVALID_DST_ADDRESS: |
| 854 | return clib_error_return (0, "Invalid server address"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 855 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 856 | case VNET_API_ERROR_INVALID_SRC_ADDRESS: |
| 857 | return clib_error_return (0, "Invalid src address"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 858 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 859 | case VNET_API_ERROR_NO_SUCH_ENTRY: |
| 860 | return clib_error_return |
| 861 | (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id); |
| 862 | |
| 863 | default: |
| 864 | return clib_error_return (0, "BUG: rv %d", rv); |
| 865 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 866 | } |
| 867 | else |
| 868 | return clib_error_return (0, "parse error`%U'", |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 869 | format_unformat_error, input); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 870 | } |
| 871 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 872 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 873 | VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = { |
| 874 | .path = "set dhcp proxy", |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 875 | .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] | 876 | .function = dhcp4_proxy_set_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 877 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 878 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 879 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 880 | static u8 * |
| 881 | format_dhcp4_proxy_server (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 882 | { |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 883 | dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *); |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 884 | ip4_fib_t *rx_fib, *server_fib; |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 885 | dhcp_server_t *server; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 886 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 887 | if (proxy == 0) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 888 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 889 | s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address", |
| 890 | "Servers FIB,Address"); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 891 | return s; |
| 892 | } |
| 893 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 894 | rx_fib = ip4_fib_get (proxy->rx_fib_index); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 895 | |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 896 | s = format (s, "%=14u%=16U", |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 897 | rx_fib->table_id, |
| 898 | format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY); |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 899 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 900 | vec_foreach (server, proxy->dhcp_servers) |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 901 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 902 | server_fib = ip4_fib_get (server->server_fib_index); |
| 903 | s = format (s, "%u,%U ", |
| 904 | server_fib->table_id, |
| 905 | format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY); |
Neale Ranns | 3466c30 | 2017-02-16 07:45:03 -0800 | [diff] [blame] | 906 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 907 | return s; |
| 908 | } |
| 909 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 910 | static int |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 911 | dhcp4_proxy_show_walk (dhcp_proxy_t * server, void *ctx) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 912 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 913 | vlib_main_t *vm = ctx; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 914 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 915 | vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 916 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 917 | return (1); |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 918 | } |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 919 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 920 | static clib_error_t * |
| 921 | dhcp4_proxy_show_command_fn (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 922 | unformat_input_t * input, |
| 923 | vlib_cli_command_t * cmd) |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 924 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 925 | vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, |
| 926 | NULL /* header line */ ); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 927 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 928 | dhcp_proxy_walk (FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 929 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 930 | return (NULL); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 931 | } |
| 932 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 933 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 934 | VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = { |
| 935 | .path = "show dhcp proxy", |
| 936 | .short_help = "Display dhcp proxy server info", |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 937 | .function = dhcp4_proxy_show_command_fn, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 938 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 939 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 940 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 941 | static clib_error_t * |
| 942 | dhcp_option_82_vss_fn (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 943 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 944 | { |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 945 | u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT; |
| 946 | u32 oui = 0, fib_id = 0, tbl_id = ~0; |
| 947 | u8 *vpn_ascii_id = 0; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 948 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 949 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 950 | { |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 951 | if (unformat (input, "table %d", &tbl_id)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 952 | ; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 953 | else if (unformat (input, "oui %d", &oui)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 954 | vss_type = VSS_TYPE_VPN_ID; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 955 | else if (unformat (input, "vpn-id %d", &fib_id)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 956 | vss_type = VSS_TYPE_VPN_ID; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 957 | else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id)) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 958 | vss_type = VSS_TYPE_ASCII; |
| 959 | else if (unformat (input, "delete") || unformat (input, "del")) |
| 960 | is_del = 1; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 961 | else |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 962 | break; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 963 | } |
| 964 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 965 | if (tbl_id == ~0) |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 966 | return clib_error_return (0, "no table ID specified."); |
| 967 | |
| 968 | int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP4, tbl_id, vss_type, |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 969 | vpn_ascii_id, oui, fib_id, is_del); |
| 970 | switch (rv) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 971 | { |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 972 | case 0: |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 973 | return 0; |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 974 | case VNET_API_ERROR_NO_SUCH_ENTRY: |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 975 | return clib_error_return (0, |
| 976 | "option 82 vss for table %d not found in in pool.", |
| 977 | tbl_id); |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 978 | default: |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 979 | return clib_error_return (0, "BUG: rv %d", rv); |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 980 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 981 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 982 | } |
| 983 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 984 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 985 | VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = { |
| 986 | .path = "set dhcp option-82 vss", |
John Lo | 70bfcaf | 2017-11-14 13:19:26 -0500 | [diff] [blame] | 987 | .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]", |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 988 | .function = dhcp_option_82_vss_fn, |
| 989 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 990 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 991 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 992 | static clib_error_t * |
| 993 | dhcp_vss_show_command_fn (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 994 | unformat_input_t * input, vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 995 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 996 | dhcp_vss_walk (FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm); |
Neale Ranns | 20a175a | 2017-02-14 07:28:41 -0800 | [diff] [blame] | 997 | |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 998 | return (NULL); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 999 | } |
| 1000 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1001 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1002 | VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = { |
| 1003 | .path = "show dhcp vss", |
| 1004 | .short_help = "show dhcp VSS", |
| 1005 | .function = dhcp_vss_show_command_fn, |
| 1006 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1007 | /* *INDENT-ON* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1008 | |
| 1009 | static clib_error_t * |
| 1010 | dhcp_option_82_address_show_command_fn (vlib_main_t * vm, |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1011 | unformat_input_t * input, |
| 1012 | vlib_cli_command_t * cmd) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1013 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1014 | vnet_main_t *vnm = vnet_get_main (); |
| 1015 | u32 sw_if_index0 = 0, sw_if_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1016 | vnet_sw_interface_t *swif; |
Neale Ranns | 2dd6852 | 2017-02-16 03:38:59 -0800 | [diff] [blame] | 1017 | ip4_address_t *ia0; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1018 | |
| 1019 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1020 | { |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1021 | |
| 1022 | if (unformat (input, "%U", |
| 1023 | unformat_vnet_sw_interface, vnm, &sw_if_index0)) |
| 1024 | { |
| 1025 | swif = vnet_get_sw_interface (vnm, sw_if_index0); |
| 1026 | sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ? |
| 1027 | swif->unnumbered_sw_if_index : sw_if_index0; |
| 1028 | ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); |
| 1029 | if (ia0) |
| 1030 | { |
| 1031 | vlib_cli_output (vm, "%=20s%=20s", "interface", |
| 1032 | "source IP address"); |
| 1033 | |
| 1034 | vlib_cli_output (vm, "%=20U%=20U", |
| 1035 | format_vnet_sw_if_index_name, |
| 1036 | vnm, sw_if_index0, format_ip4_address, ia0); |
| 1037 | } |
| 1038 | else |
| 1039 | vlib_cli_output (vm, "%=34s %=20U", |
| 1040 | "No IPv4 address configured on", |
| 1041 | format_vnet_sw_if_index_name, vnm, sw_if_index); |
| 1042 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1043 | else |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1044 | break; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1045 | } |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1046 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1047 | return 0; |
| 1048 | } |
| 1049 | |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1050 | /* *INDENT-OFF* */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1051 | VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = { |
| 1052 | .path = "show dhcp option-82-address interface", |
| 1053 | .short_help = "show dhcp option-82-address interface <interface>", |
| 1054 | .function = dhcp_option_82_address_show_command_fn, |
| 1055 | }; |
khemendra kumar | 34719e3 | 2017-12-08 18:06:52 +0530 | [diff] [blame^] | 1056 | /* *INDENT-ON* */ |
| 1057 | |
| 1058 | /* |
| 1059 | * fd.io coding-style-patch-verification: ON |
| 1060 | * |
| 1061 | * Local Variables: |
| 1062 | * eval: (c-set-style "gnu") |
| 1063 | * End: |
| 1064 | */ |