FD.io VPP  v17.01-9-ge7dcee4
Vector Packet Processing
ip.h
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1 /*
2  * Copyright (c) 2015 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 /*
16  * ip/ip.h: ip generic (4 or 6) main
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #ifndef included_ip_main_h
41 #define included_ip_main_h
42 
43 #include <vppinfra/hash.h>
44 #include <vppinfra/heap.h> /* adjacency heap */
45 #include <vppinfra/ptclosure.h>
46 
47 #include <vnet/vnet.h>
48 
49 #include <vnet/ip/format.h>
50 #include <vnet/ip/ip_packet.h>
51 #include <vnet/ip/lookup.h>
52 
53 #include <vnet/ip/tcp_packet.h>
54 #include <vnet/ip/udp_packet.h>
55 #include <vnet/ip/icmp46_packet.h>
56 
57 #include <vnet/ip/ip4.h>
58 #include <vnet/ip/ip4_error.h>
59 #include <vnet/ip/ip4_packet.h>
60 #include <vnet/ip/icmp4.h>
61 
62 #include <vnet/ip/ip6.h>
63 #include <vnet/ip/ip6_packet.h>
64 #include <vnet/ip/ip6_error.h>
65 #include <vnet/ip/icmp6.h>
67 
68 /* Per protocol info. */
69 typedef struct
70 {
71  /* Protocol name (also used as hash key). */
72  u8 *name;
73 
74  /* Protocol number. */
76 
77  /* Format function for this IP protocol. */
79 
80  /* Parser for header. */
82 
83  /* Parser for per-protocol matches. */
85 
86  /* Parser for packet generator edits for this protocol. */
89 
90 /* Per TCP/UDP port info. */
91 typedef struct
92 {
93  /* Port name (used as hash key). */
94  u8 *name;
95 
96  /* UDP/TCP port number in network byte order. */
98 
99  /* Port specific format function. */
101 
102  /* Parser for packet generator edits for this protocol. */
105 
106 typedef struct
107 {
108  /* Per IP protocol info. */
110 
111  /* Protocol info index hashed by 8 bit IP protocol. */
113 
114  /* Hash table mapping IP protocol name (see protocols.def)
115  to protocol number. */
117 
118  /* Per TCP/UDP port info. */
120 
121  /* Hash table from network-byte-order port to port info index. */
123 
124  /* Hash table mapping TCP/UDP name to port info index. */
126 } ip_main_t;
127 
128 extern ip_main_t ip_main;
129 
131 
132 static inline ip_protocol_info_t *
134 {
135  uword *p;
136 
137  p = hash_get (im->protocol_info_by_protocol, protocol);
138  return p ? vec_elt_at_index (im->protocol_infos, p[0]) : 0;
139 }
140 
141 static inline tcp_udp_port_info_t *
143 {
144  uword *p;
145 
146  p = hash_get (im->port_info_by_port, port);
147  return p ? vec_elt_at_index (im->port_infos, p[0]) : 0;
148 }
149 
152  vlib_buffer_t * first_buffer,
153  u32 first_buffer_offset,
154  u32 n_bytes_to_checksum, ip_csum_t sum)
155 {
156  vlib_buffer_t *b = first_buffer;
157  u32 n_bytes_left = n_bytes_to_checksum;
158  ASSERT (b->current_length >= first_buffer_offset);
159  void *h;
160  u32 n;
161 
162  n = clib_min (n_bytes_left, b->current_length);
163  h = vlib_buffer_get_current (b) + first_buffer_offset;
164  sum = ip_incremental_checksum (sum, h, n);
166  {
167  while (1)
168  {
169  n_bytes_left -= n;
170  if (n_bytes_left == 0)
171  break;
172  b = vlib_get_buffer (vm, b->next_buffer);
173  n = clib_min (n_bytes_left, b->current_length);
174  h = vlib_buffer_get_current (b);
175  sum = ip_incremental_checksum (sum, h, n);
176  }
177  }
178 
179  return sum;
180 }
181 
182 void ip_del_all_interface_addresses (vlib_main_t * vm, u32 sw_if_index);
183 
186 
187 #endif /* included_ip_main_h */
188 
189 /*
190  * fd.io coding-style-patch-verification: ON
191  *
192  * Local Variables:
193  * eval: (c-set-style "gnu")
194  * End:
195  */
uword * protocol_info_by_name
Definition: ip.h:116
uword * protocol_info_by_protocol
Definition: ip.h:112
static ip_csum_t ip_incremental_checksum_buffer(vlib_main_t *vm, vlib_buffer_t *first_buffer, u32 first_buffer_offset, u32 n_bytes_to_checksum, ip_csum_t sum)
Definition: ip.h:151
#define clib_min(x, y)
Definition: clib.h:326
uword( unformat_function_t)(unformat_input_t *input, va_list *args)
Definition: format.h:231
Definitions for all things IP (v4|v6) unicast and multicast lookup related.
uword * port_info_by_name
Definition: ip.h:125
struct _vlib_node_registration vlib_node_registration_t
uword ip_csum_t
Definition: ip_packet.h:90
Definition: ip.h:106
ip_protocol_t protocol
Definition: ip.h:75
unformat_function_t * unformat_pg_edit
Definition: ip.h:87
ip_csum_t ip_incremental_checksum(ip_csum_t sum, void *_data, uword n_bytes)
Definition: ip_checksum.c:43
#define always_inline
Definition: clib.h:84
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:194
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
#define VLIB_BUFFER_NEXT_PRESENT
Definition: buffer.h:97
uword * port_info_by_port
Definition: ip.h:122
#define hash_get(h, key)
Definition: hash.h:248
static ip_protocol_info_t * ip_get_protocol_info(ip_main_t *im, u32 protocol)
Definition: ip.h:133
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:82
format_function_t * format_header
Definition: ip.h:78
#define PREDICT_FALSE(x)
Definition: clib.h:97
enum ip_protocol ip_protocol_t
void ip_del_all_interface_addresses(vlib_main_t *vm, u32 sw_if_index)
Definition: ip46_cli.c:80
vlib_node_registration_t ip4_inacl_node
(constructor) VLIB_REGISTER_NODE (ip4_inacl_node)
Definition: ip_input_acl.c:393
ip_protocol_info_t * protocol_infos
Definition: ip.h:109
clib_error_t * ip_main_init(vlib_main_t *vm)
Definition: ip_init.c:45
vlib_node_registration_t ip6_inacl_node
(constructor) VLIB_REGISTER_NODE (ip6_inacl_node)
Definition: ip_input_acl.c:418
ip_main_t ip_main
Definition: ip_init.c:42
static tcp_udp_port_info_t * ip_get_tcp_udp_port_info(ip_main_t *im, u32 port)
Definition: ip.h:142
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
unformat_function_t * unformat_pg_edit
Definition: ip.h:103
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:117
unformat_function_t * unformat_header
Definition: ip.h:81
format_function_t * format_header
Definition: ip.h:100
u8 *( format_function_t)(u8 *s, va_list *args)
Definition: format.h:48
unformat_function_t * unformat_match
Definition: ip.h:84
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
u8 * name
Definition: ip.h:72
tcp_udp_port_info_t * port_infos
Definition: ip.h:119
u32 flags
buffer flags: VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:85
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57