2 * Copyright (c) 2017 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __included_udp_h__
16 #define __included_udp_h__
18 #include <vnet/vnet.h>
19 #include <vnet/udp/udp_packet.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/ip/ip4.h>
22 #include <vnet/ip/ip4_packet.h>
23 #include <vnet/pg/pg.h>
24 #include <vnet/ip/format.h>
26 #include <vnet/ip/ip.h>
27 #include <vnet/session/transport.h>
31 transport_connection_t connection; /** must be first */
33 /** ersatz MTU to limit fifo pushes to test data size */
37 typedef struct _udp_uri_main
39 /* Per-worker thread udp connection pools */
40 udp_connection_t **udp_sessions;
41 udp_connection_t *udp_listeners;
44 vlib_main_t *vlib_main;
45 vnet_main_t *vnet_main;
50 extern udp_uri_main_t udp_uri_main;
51 extern vlib_node_registration_t udp4_uri_input_node;
53 always_inline udp_uri_main_t *
59 always_inline udp_connection_t *
60 udp_connection_get (u32 conn_index, u32 thread_index)
62 return pool_elt_at_index (udp_uri_main.udp_sessions[thread_index],
66 always_inline udp_connection_t *
67 udp_listener_get (u32 conn_index)
69 return pool_elt_at_index (udp_uri_main.udp_listeners, conn_index);
74 #define udp_error(n,s) UDP_ERROR_##n,
75 #include <vnet/udp/udp_error.def>
80 #define foreach_udp4_dst_port \
81 _ (67, dhcp_to_server) \
82 _ (68, dhcp_to_client) \
96 #define foreach_udp6_dst_port \
97 _ (547, dhcpv6_to_server) \
98 _ (546, dhcpv6_to_client) \
101 _ (3785, bfd_echo6) \
102 _ (4341, lisp_gpe6) \
104 _ (4790, vxlan6_gpe) \
109 #define _(n,f) UDP_DST_PORT_##f = n,
110 foreach_udp4_dst_port foreach_udp6_dst_port
116 #define _(n,f) UDP6_DST_PORT_##f = n,
117 foreach_udp6_dst_port
123 /* Name (a c string). */
126 /* GRE protocol type in host byte order. */
127 udp_dst_port_t dst_port;
129 /* Node which handles this type. */
132 /* Next index for this type. */
134 } udp_dst_port_info_t;
139 UDP_IP4, /* the code is full of is_ip4... */
145 udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
147 /* Hash tables mapping name/protocol to protocol info index. */
148 uword *dst_port_info_by_name[N_UDP_AF];
149 uword *dst_port_info_by_dst_port[N_UDP_AF];
151 /* Sparse vector mapping udp dst_port in network byte order
153 u16 *next_by_dst_port4;
154 u16 *next_by_dst_port6;
159 vlib_main_t *vlib_main;
162 always_inline udp_dst_port_info_t *
163 udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
165 uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
166 return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
169 format_function_t format_udp_header;
170 format_function_t format_udp_rx_trace;
172 unformat_function_t unformat_udp_header;
174 void udp_register_dst_port (vlib_main_t * vm,
175 udp_dst_port_t dst_port,
176 u32 node_index, u8 is_ip4);
179 udp_unregister_dst_port (vlib_main_t * vm,
180 udp_dst_port_t dst_port, u8 is_ip4);
182 void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
185 ip_udp_fixup_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 is_ip4)
196 ip0 = vlib_buffer_get_current (b0);
198 /* fix the <bleep>ing outer-IP checksum */
199 sum0 = ip0->checksum;
200 /* old_l0 always 0, see the rewrite setup */
201 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
203 sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
204 length /* changed member */ );
205 ip0->checksum = ip_csum_fold (sum0);
206 ip0->length = new_l0;
209 udp0 = (udp_header_t *) (ip0 + 1);
210 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
212 udp0->length = new_l0;
219 ip0 = vlib_buffer_get_current (b0);
221 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
223 ip0->payload_length = new_l0;
226 udp0 = (udp_header_t *) (ip0 + 1);
227 udp0->length = new_l0;
230 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
231 ASSERT (bogus0 == 0);
233 if (udp0->checksum == 0)
234 udp0->checksum = 0xffff;
239 ip_udp_encap_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 * ec0, word ec_len,
242 vlib_buffer_advance (b0, -ec_len);
248 ip0 = vlib_buffer_get_current (b0);
250 /* Apply the encap string. */
251 clib_memcpy (ip0, ec0, ec_len);
252 ip_udp_fixup_one (vm, b0, 1);
258 ip0 = vlib_buffer_get_current (b0);
260 /* Apply the encap string. */
261 clib_memcpy (ip0, ec0, ec_len);
262 ip_udp_fixup_one (vm, b0, 0);
267 ip_udp_encap_two (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * b1,
268 u8 * ec0, u8 * ec1, word ec_len, u8 is_v4)
271 udp_header_t *udp0, *udp1;
273 ASSERT (_vec_len (ec0) == _vec_len (ec1));
275 vlib_buffer_advance (b0, -ec_len);
276 vlib_buffer_advance (b1, -ec_len);
280 ip4_header_t *ip0, *ip1;
281 ip_csum_t sum0, sum1;
282 u16 old_l0 = 0, old_l1 = 0;
284 ip0 = vlib_buffer_get_current (b0);
285 ip1 = vlib_buffer_get_current (b1);
287 /* Apply the encap string */
288 clib_memcpy (ip0, ec0, ec_len);
289 clib_memcpy (ip1, ec1, ec_len);
291 /* fix the <bleep>ing outer-IP checksum */
292 sum0 = ip0->checksum;
293 sum1 = ip1->checksum;
295 /* old_l0 always 0, see the rewrite setup */
296 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
297 new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
299 sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
300 length /* changed member */ );
301 sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
302 length /* changed member */ );
304 ip0->checksum = ip_csum_fold (sum0);
305 ip1->checksum = ip_csum_fold (sum1);
307 ip0->length = new_l0;
308 ip1->length = new_l1;
311 udp0 = (udp_header_t *) (ip0 + 1);
312 udp1 = (udp_header_t *) (ip1 + 1);
315 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
318 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1) -
320 udp0->length = new_l0;
321 udp1->length = new_l1;
325 ip6_header_t *ip0, *ip1;
328 ip0 = vlib_buffer_get_current (b0);
329 ip1 = vlib_buffer_get_current (b1);
331 /* Apply the encap string. */
332 clib_memcpy (ip0, ec0, ec_len);
333 clib_memcpy (ip1, ec1, ec_len);
335 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
337 new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
339 ip0->payload_length = new_l0;
340 ip1->payload_length = new_l1;
343 udp0 = (udp_header_t *) (ip0 + 1);
344 udp1 = (udp_header_t *) (ip1 + 1);
346 udp0->length = new_l0;
347 udp1->length = new_l1;
350 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
352 ip6_tcp_udp_icmp_compute_checksum (vm, b1, ip1, &bogus1);
353 ASSERT (bogus0 == 0);
354 ASSERT (bogus1 == 0);
356 if (udp0->checksum == 0)
357 udp0->checksum = 0xffff;
358 if (udp1->checksum == 0)
359 udp1->checksum = 0xffff;
364 * fd.io coding-style-patch-verification: ON
367 * eval: (c-set-style "gnu")
371 #endif /* __included_udp_h__ */