2 * Copyright (c) 2017-2020 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_inlines.h>
20 #include <vnet/udp/udp_local.h>
21 #include <vnet/udp/udp_packet.h>
22 #include <vnet/ip/ip4_packet.h>
23 #include <vnet/ip/format.h>
25 #include <vnet/ip/ip.h>
26 #include <vnet/session/transport.h>
30 #define udp_error(n,s) UDP_ERROR_##n,
31 #include <vnet/udp/udp_error.def>
36 #define foreach_udp_connection_flag \
37 _(CONNECTED, "CONNECTED") /**< connected mode */ \
38 _(OWNS_PORT, "OWNS_PORT") /**< port belong to conn (UDPC) */ \
39 _(CLOSING, "CLOSING") /**< conn closed with data */ \
40 _(LISTEN, "LISTEN") /**< conn is listening */ \
41 _(MIGRATED, "MIGRATED") /**< cloned to another thread */ \
43 enum udp_conn_flags_bits
45 #define _(sym, str) UDP_CONN_F_BIT_##sym,
46 foreach_udp_connection_flag
51 typedef enum udp_conn_flags_
53 #define _(sym, str) UDP_CONN_F_##sym = 1 << UDP_CONN_F_BIT_##sym,
54 foreach_udp_connection_flag
60 /** Required for pool_get_aligned */
61 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
62 transport_connection_t connection; /**< must be first */
63 clib_spinlock_t rx_lock; /**< rx fifo lock */
64 u8 flags; /**< connection flags */
65 u16 mss; /**< connection mss */
70 /* Name (a c string). */
73 /* Port number in host byte order. */
74 udp_dst_port_t dst_port;
76 /* Node which handles this type. */
79 /* Next index for this type. */
82 /* UDP sessions refcount (not tunnels) */
85 /* Parser for packet generator edits for this protocol */
86 unformat_function_t *unformat_pg_edit;
87 } udp_dst_port_info_t;
92 UDP_IP4, /* the code is full of is_ip4... */
98 udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
100 /* Hash tables mapping name/protocol to protocol info index. */
101 uword *dst_port_info_by_name[N_UDP_AF];
102 uword *dst_port_info_by_dst_port[N_UDP_AF];
104 /* Sparse vector mapping udp dst_port in network byte order
106 u16 *next_by_dst_port4;
107 u16 *next_by_dst_port6;
111 /* Udp local to input arc index */
112 u32 local_to_input_edge[N_UDP_AF];
115 * Per-worker thread udp connection pools used with session layer
117 udp_connection_t **connections;
118 u32 *connection_peekers;
119 clib_spinlock_t *peekers_readers_locks;
120 clib_spinlock_t *peekers_write_locks;
121 udp_connection_t *listener_pool;
126 u8 icmp_send_unreachable_disabled;
129 extern udp_main_t udp_main;
130 extern vlib_node_registration_t udp4_input_node;
131 extern vlib_node_registration_t udp6_input_node;
132 extern vlib_node_registration_t udp4_local_node;
133 extern vlib_node_registration_t udp6_local_node;
135 void udp_add_dst_port (udp_main_t * um, udp_dst_port_t dst_port,
136 char *dst_port_name, u8 is_ip4);
138 always_inline udp_connection_t *
139 udp_connection_get (u32 conn_index, u32 thread_index)
141 if (pool_is_free_index (udp_main.connections[thread_index], conn_index))
143 return pool_elt_at_index (udp_main.connections[thread_index], conn_index);
146 always_inline udp_connection_t *
147 udp_listener_get (u32 conn_index)
149 return pool_elt_at_index (udp_main.listener_pool, conn_index);
152 always_inline udp_main_t *
158 always_inline udp_connection_t *
159 udp_connection_from_transport (transport_connection_t * tc)
161 return ((udp_connection_t *) tc);
165 udp_connection_index (udp_connection_t * uc)
167 return (uc - udp_main.connections[uc->c_thread_index]);
170 void udp_connection_free (udp_connection_t * uc);
171 udp_connection_t *udp_connection_alloc (u32 thread_index);
174 * Acquires a lock that blocks a connection pool from expanding.
177 udp_pool_add_peeker (u32 thread_index)
179 if (thread_index != vlib_get_thread_index ())
181 clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
182 udp_main.connection_peekers[thread_index] += 1;
183 if (udp_main.connection_peekers[thread_index] == 1)
184 clib_spinlock_lock_if_init (&udp_main.peekers_write_locks[thread_index]);
185 clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
190 udp_pool_remove_peeker (u32 thread_index)
192 if (thread_index != vlib_get_thread_index ())
194 ASSERT (udp_main.connection_peekers[thread_index] > 0);
195 clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
196 udp_main.connection_peekers[thread_index] -= 1;
197 if (udp_main.connection_peekers[thread_index] == 0)
198 clib_spinlock_unlock_if_init (&udp_main.peekers_write_locks
200 clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
204 always_inline udp_connection_t *
205 udp_connection_clone_safe (u32 connection_index, u32 thread_index)
207 udp_connection_t *old_c, *new_c;
208 u32 current_thread_index = vlib_get_thread_index ();
209 new_c = udp_connection_alloc (current_thread_index);
211 /* If during the memcpy pool is reallocated AND the memory allocator
212 * decides to give the old chunk of memory to somebody in a hurry to
213 * scribble something on it, we have a problem. So add this thread as
214 * a session pool peeker.
216 udp_pool_add_peeker (thread_index);
217 old_c = udp_main.connections[thread_index] + connection_index;
218 clib_memcpy_fast (new_c, old_c, sizeof (*new_c));
219 old_c->flags |= UDP_CONN_F_MIGRATED;
220 udp_pool_remove_peeker (thread_index);
221 new_c->c_thread_index = current_thread_index;
222 new_c->c_c_index = udp_connection_index (new_c);
223 new_c->c_fib_index = old_c->c_fib_index;
224 /* Assume cloned sessions don't need lock */
229 always_inline udp_dst_port_info_t *
230 udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
232 uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
233 return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
236 format_function_t format_udp_header;
237 format_function_t format_udp_rx_trace;
238 format_function_t format_udp_connection;
239 unformat_function_t unformat_udp_header;
240 unformat_function_t unformat_udp_port;
242 void udp_connection_share_port (u16 lcl_port, u8 is_ip4);
244 void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
247 * fd.io coding-style-patch-verification: ON
250 * eval: (c-set-style "gnu")
254 #endif /* __included_udp_h__ */