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 \
82 _ (67, dhcp_to_server) \
83 _ (68, dhcp_to_client) \
99 #define foreach_udp6_dst_port \
101 _ (547, dhcpv6_to_server) \
102 _ (546, dhcpv6_to_client) \
105 _ (3785, bfd_echo6) \
106 _ (4341, lisp_gpe6) \
108 _ (4790, VXLAN6_GPE) \
111 _ (53053, dns_reply6)
115 #define _(n,f) UDP_DST_PORT_##f = n,
116 foreach_udp4_dst_port foreach_udp6_dst_port
122 #define _(n,f) UDP6_DST_PORT_##f = n,
123 foreach_udp6_dst_port
129 /* Name (a c string). */
132 /* GRE protocol type in host byte order. */
133 udp_dst_port_t dst_port;
135 /* Node which handles this type. */
138 /* Next index for this type. */
140 } udp_dst_port_info_t;
145 UDP_IP4, /* the code is full of is_ip4... */
151 udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
153 /* Hash tables mapping name/protocol to protocol info index. */
154 uword *dst_port_info_by_name[N_UDP_AF];
155 uword *dst_port_info_by_dst_port[N_UDP_AF];
157 /* Sparse vector mapping udp dst_port in network byte order
159 u16 *next_by_dst_port4;
160 u16 *next_by_dst_port6;
165 vlib_main_t *vlib_main;
168 always_inline udp_dst_port_info_t *
169 udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
171 uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
172 return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
175 format_function_t format_udp_header;
176 format_function_t format_udp_rx_trace;
178 unformat_function_t unformat_udp_header;
180 void udp_register_dst_port (vlib_main_t * vm,
181 udp_dst_port_t dst_port,
182 u32 node_index, u8 is_ip4);
185 udp_unregister_dst_port (vlib_main_t * vm,
186 udp_dst_port_t dst_port, u8 is_ip4);
188 void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
191 ip_udp_fixup_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 is_ip4)
202 ip0 = vlib_buffer_get_current (b0);
204 /* fix the <bleep>ing outer-IP checksum */
205 sum0 = ip0->checksum;
206 /* old_l0 always 0, see the rewrite setup */
207 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
209 sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
210 length /* changed member */ );
211 ip0->checksum = ip_csum_fold (sum0);
212 ip0->length = new_l0;
215 udp0 = (udp_header_t *) (ip0 + 1);
216 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
218 udp0->length = new_l0;
225 ip0 = vlib_buffer_get_current (b0);
227 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
229 ip0->payload_length = new_l0;
232 udp0 = (udp_header_t *) (ip0 + 1);
233 udp0->length = new_l0;
236 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
237 ASSERT (bogus0 == 0);
239 if (udp0->checksum == 0)
240 udp0->checksum = 0xffff;
245 ip_udp_encap_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 * ec0, word ec_len,
248 vlib_buffer_advance (b0, -ec_len);
254 ip0 = vlib_buffer_get_current (b0);
256 /* Apply the encap string. */
257 clib_memcpy (ip0, ec0, ec_len);
258 ip_udp_fixup_one (vm, b0, 1);
264 ip0 = vlib_buffer_get_current (b0);
266 /* Apply the encap string. */
267 clib_memcpy (ip0, ec0, ec_len);
268 ip_udp_fixup_one (vm, b0, 0);
273 ip_udp_encap_two (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * b1,
274 u8 * ec0, u8 * ec1, word ec_len, u8 is_v4)
277 udp_header_t *udp0, *udp1;
279 ASSERT (_vec_len (ec0) == _vec_len (ec1));
281 vlib_buffer_advance (b0, -ec_len);
282 vlib_buffer_advance (b1, -ec_len);
286 ip4_header_t *ip0, *ip1;
287 ip_csum_t sum0, sum1;
288 u16 old_l0 = 0, old_l1 = 0;
290 ip0 = vlib_buffer_get_current (b0);
291 ip1 = vlib_buffer_get_current (b1);
293 /* Apply the encap string */
294 clib_memcpy (ip0, ec0, ec_len);
295 clib_memcpy (ip1, ec1, ec_len);
297 /* fix the <bleep>ing outer-IP checksum */
298 sum0 = ip0->checksum;
299 sum1 = ip1->checksum;
301 /* old_l0 always 0, see the rewrite setup */
302 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
303 new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
305 sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
306 length /* changed member */ );
307 sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
308 length /* changed member */ );
310 ip0->checksum = ip_csum_fold (sum0);
311 ip1->checksum = ip_csum_fold (sum1);
313 ip0->length = new_l0;
314 ip1->length = new_l1;
317 udp0 = (udp_header_t *) (ip0 + 1);
318 udp1 = (udp_header_t *) (ip1 + 1);
321 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
324 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1) -
326 udp0->length = new_l0;
327 udp1->length = new_l1;
331 ip6_header_t *ip0, *ip1;
334 ip0 = vlib_buffer_get_current (b0);
335 ip1 = vlib_buffer_get_current (b1);
337 /* Apply the encap string. */
338 clib_memcpy (ip0, ec0, ec_len);
339 clib_memcpy (ip1, ec1, ec_len);
341 new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
343 new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
345 ip0->payload_length = new_l0;
346 ip1->payload_length = new_l1;
349 udp0 = (udp_header_t *) (ip0 + 1);
350 udp1 = (udp_header_t *) (ip1 + 1);
352 udp0->length = new_l0;
353 udp1->length = new_l1;
356 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
358 ip6_tcp_udp_icmp_compute_checksum (vm, b1, ip1, &bogus1);
359 ASSERT (bogus0 == 0);
360 ASSERT (bogus1 == 0);
362 if (udp0->checksum == 0)
363 udp0->checksum = 0xffff;
364 if (udp1->checksum == 0)
365 udp1->checksum = 0xffff;
370 * fd.io coding-style-patch-verification: ON
373 * eval: (c-set-style "gnu")
377 #endif /* __included_udp_h__ */