Line data Source code
1 : /*
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:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
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.
14 : */
15 : #ifndef __included_udp_h__
16 : #define __included_udp_h__
17 :
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>
24 :
25 : #include <vnet/ip/ip.h>
26 : #include <vnet/session/transport.h>
27 :
28 : #define UDP_NO_NODE_SET ((u16) ~0)
29 :
30 : typedef enum
31 : {
32 : #define udp_error(f, n, s, d) UDP_ERROR_##f,
33 : #include <vnet/udp/udp_error.def>
34 : #undef udp_error
35 : UDP_N_ERROR,
36 : } udp_error_t;
37 :
38 : #define foreach_udp_connection_flag \
39 : _(CONNECTED, "CONNECTED") /**< connected mode */ \
40 : _(OWNS_PORT, "OWNS_PORT") /**< port belong to conn (UDPC) */ \
41 : _(CLOSING, "CLOSING") /**< conn closed with data */ \
42 : _(LISTEN, "LISTEN") /**< conn is listening */ \
43 : _(MIGRATED, "MIGRATED") /**< cloned to another thread */ \
44 :
45 : enum udp_conn_flags_bits
46 : {
47 : #define _(sym, str) UDP_CONN_F_BIT_##sym,
48 : foreach_udp_connection_flag
49 : #undef _
50 : UDP_CONN_N_FLAGS
51 : };
52 :
53 : typedef enum udp_conn_flags_
54 : {
55 : #define _(sym, str) UDP_CONN_F_##sym = 1 << UDP_CONN_F_BIT_##sym,
56 : foreach_udp_connection_flag
57 : #undef _
58 : } udp_conn_flags_t;
59 :
60 : #define foreach_udp_cfg_flag _ (NO_CSUM_OFFLOAD, "no-csum-offload")
61 :
62 : typedef enum udp_cfg_flag_bits_
63 : {
64 : #define _(sym, str) UDP_CFG_F_##sym##_BIT,
65 : foreach_udp_cfg_flag
66 : #undef _
67 : UDP_CFG_N_FLAG_BITS
68 : } udp_cfg_flag_bits_e;
69 :
70 : typedef enum udp_cfg_flag_
71 : {
72 : #define _(sym, str) UDP_CFG_F_##sym = 1 << UDP_CFG_F_##sym##_BIT,
73 : foreach_udp_cfg_flag
74 : #undef _
75 : UDP_CFG_N_FLAGS
76 : } __clib_packed udp_cfg_flags_t;
77 :
78 : typedef struct
79 : {
80 : /** Required for pool_get_aligned */
81 : CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
82 : transport_connection_t connection; /**< must be first */
83 : clib_spinlock_t rx_lock; /**< rx fifo lock */
84 : u8 flags; /**< connection flags */
85 : udp_cfg_flags_t cfg_flags; /**< configuration flags */
86 : u16 mss; /**< connection mss */
87 : u32 sw_if_index; /**< connection sw_if_index */
88 : u32 next_node_index; /**< Can be used to control next node in output */
89 : u32 next_node_opaque; /**< Opaque to pass to next node */
90 : } udp_connection_t;
91 :
92 : #define udp_csum_offload(uc) (!((uc)->cfg_flags & UDP_CFG_F_NO_CSUM_OFFLOAD))
93 :
94 : typedef struct
95 : {
96 : /* Name (a c string). */
97 : char *name;
98 :
99 : /* Port number in host byte order. */
100 : udp_dst_port_t dst_port;
101 :
102 : /* Node which handles this type. */
103 : u32 node_index;
104 :
105 : /* Next index for this type. */
106 : u32 next_index;
107 :
108 : /* Parser for packet generator edits for this protocol */
109 : unformat_function_t *unformat_pg_edit;
110 : } udp_dst_port_info_t;
111 :
112 : typedef enum
113 : {
114 : UDP_IP6 = 0,
115 : UDP_IP4, /* the code is full of is_ip4... */
116 : N_UDP_AF,
117 : } udp_af_t;
118 :
119 : typedef struct udp_worker_
120 : {
121 : udp_connection_t *connections;
122 : u32 *pending_cleanups;
123 : } udp_worker_t;
124 :
125 : typedef struct
126 : {
127 : udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
128 :
129 : /* Hash tables mapping name/protocol to protocol info index. */
130 : uword *dst_port_info_by_name[N_UDP_AF];
131 : uword *dst_port_info_by_dst_port[N_UDP_AF];
132 :
133 : /* Sparse vector mapping udp dst_port in network byte order
134 : to next index. */
135 : u16 *next_by_dst_port4;
136 : u16 *next_by_dst_port6;
137 : u8 punt_unknown4;
138 : u8 punt_unknown6;
139 :
140 : /* Udp local to input arc index */
141 : u32 local_to_input_edge[N_UDP_AF];
142 :
143 : /*
144 : * UDP transport layer per-thread context
145 : */
146 :
147 : udp_worker_t *wrk;
148 : udp_connection_t *listener_pool;
149 :
150 : /* Refcounts for ports consumed by udp transports to handle
151 : * both passive and active opens using the same port */
152 : u16 *transport_ports_refcnt[N_UDP_AF];
153 :
154 : u16 default_mtu;
155 : u16 msg_id_base;
156 : u8 csum_offload;
157 :
158 : u8 icmp_send_unreachable_disabled;
159 : } udp_main_t;
160 :
161 : extern udp_main_t udp_main;
162 : extern vlib_node_registration_t udp4_input_node;
163 : extern vlib_node_registration_t udp6_input_node;
164 : extern vlib_node_registration_t udp4_local_node;
165 : extern vlib_node_registration_t udp6_local_node;
166 : extern vlib_node_registration_t udp4_output_node;
167 : extern vlib_node_registration_t udp6_output_node;
168 :
169 : void udp_add_dst_port (udp_main_t * um, udp_dst_port_t dst_port,
170 : char *dst_port_name, u8 is_ip4);
171 :
172 : always_inline udp_worker_t *
173 234508 : udp_worker_get (u32 thread_index)
174 : {
175 234508 : return vec_elt_at_index (udp_main.wrk, thread_index);
176 : }
177 :
178 : always_inline udp_connection_t *
179 234347 : udp_connection_get (u32 conn_index, u32 thread_index)
180 : {
181 234347 : udp_worker_t *wrk = udp_worker_get (thread_index);
182 :
183 234347 : if (pool_is_free_index (wrk->connections, conn_index))
184 0 : return 0;
185 234347 : return pool_elt_at_index (wrk->connections, conn_index);
186 : }
187 :
188 : always_inline udp_connection_t *
189 62 : udp_listener_get (u32 conn_index)
190 : {
191 62 : return pool_elt_at_index (udp_main.listener_pool, conn_index);
192 : }
193 :
194 : always_inline udp_main_t *
195 619 : vnet_get_udp_main ()
196 : {
197 619 : return &udp_main;
198 : }
199 :
200 : always_inline udp_connection_t *
201 94317 : udp_connection_from_transport (transport_connection_t * tc)
202 : {
203 94317 : return ((udp_connection_t *) tc);
204 : }
205 :
206 : void udp_connection_free (udp_connection_t * uc);
207 : udp_connection_t *udp_connection_alloc (u32 thread_index);
208 :
209 : always_inline udp_connection_t *
210 0 : udp_connection_clone_safe (u32 connection_index, u32 thread_index)
211 : {
212 0 : u32 current_thread_index = vlib_get_thread_index (), new_index;
213 : udp_connection_t *old_c, *new_c;
214 :
215 0 : new_c = udp_connection_alloc (current_thread_index);
216 0 : new_index = new_c->c_c_index;
217 : /* Connection pool always realloced with barrier */
218 0 : old_c = udp_main.wrk[thread_index].connections + connection_index;
219 0 : clib_memcpy_fast (new_c, old_c, sizeof (*new_c));
220 0 : old_c->flags |= UDP_CONN_F_MIGRATED;
221 0 : new_c->c_thread_index = current_thread_index;
222 0 : new_c->c_c_index = new_index;
223 0 : new_c->c_fib_index = old_c->c_fib_index;
224 : /* Assume cloned sessions don't need lock */
225 0 : new_c->rx_lock = 0;
226 0 : return new_c;
227 : }
228 :
229 : always_inline udp_dst_port_info_t *
230 1477 : udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
231 : {
232 1477 : uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
233 1477 : return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
234 : }
235 :
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;
241 :
242 : void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
243 :
244 : /*
245 : * fd.io coding-style-patch-verification: ON
246 : *
247 : * Local Variables:
248 : * eval: (c-set-style "gnu")
249 : * End:
250 : */
251 :
252 : #endif /* __included_udp_h__ */
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