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Vector Packet Processing
ipfix_packet.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 #ifndef __included_ipfix_packet_h__
16 #define __included_ipfix_packet_h__
17 
19 
20 /* From RFC-7011:
21  * https://tools.ietf.org/html/rfc7011
22  */
23 
24 typedef struct {
30 
31 static inline u32 version_length (u16 length)
32 {
33  return clib_host_to_net_u32 (0x000a0000 | length);
34 }
35 
36 
37 /*
38  * The Field Specifier format is shown in Figure G.
39  *
40  * 0 1 2 3
41  * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
42  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
43  * |E| Information Element ident. | Field Length |
44  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45  * | Enterprise Number |
46  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
47  *
48  * Figure G: Field Specifier Format
49  *
50  * Where:
51  *
52  * E
53  *
54  * Enterprise bit. This is the first bit of the Field Specifier. If
55  * this bit is zero, the Information Element identifier identifies an
56  * Information Element in [IANA-IPFIX], and the four-octet Enterprise
57  * Number field MUST NOT be present. If this bit is one, the
58  * Information Element identifier identifies an enterprise-specific
59  * Information Element, and the Enterprise Number field MUST be
60  * present.
61  */
62 
63 typedef struct {
67 
68 typedef struct {
71 
72 static inline u32 ipfix_e_id_length (int e, u16 id, u16 length)
73 {
74  u32 value;
75  value = (e<<31) | ((id&0x7FFF) <<16) | length;
76  return clib_host_to_net_u32 (value);
77 }
78 
79 /*
80  * Every Set contains a common header. This header is defined in
81  * Figure I.
82  *
83  * 0 1 2 3
84  * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
85  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
86  * | Set ID | Length |
87  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
88  *
89  * Figure I: Set Header Format
90  *
91  * Each Set Header field is exported in network format. The fields are
92  * defined as follows:
93  *
94  * Set ID
95  *
96  * Identifies the Set. A value of 2 is reserved for Template Sets.
97  * A value of 3 is reserved for Options Template Sets. Values from 4
98  * to 255 are reserved for future use. Values 256 and above are used
99  * for Data Sets. The Set ID values of 0 and 1 are not used, for
100  * historical reasons [RFC3954].
101  *
102  * Length
103  *
104  * Total length of the Set, in octets, including the Set Header, all
105  * records, and the optional padding. Because an individual Set MAY
106  * contain multiple records, the Length value MUST be used to
107  * determine the position of the next Set.
108  */
109 
110 typedef struct {
113 
114 static inline u32 ipfix_set_id_length (u16 set_id, u16 length)
115 {
116  return clib_host_to_net_u32 ((set_id<<16) | length);
117 }
118 
119 /*
120  * The format of the Template Record is shown in Figure J. It consists
121  * of a Template Record Header and one or more Field Specifiers. Field
122  * Specifiers are defined in Figure G above.
123  *
124  * +--------------------------------------------------+
125  * | Template Record Header |
126  * +--------------------------------------------------+
127  * | Field Specifier |
128  * +--------------------------------------------------+
129  * | Field Specifier |
130  * +--------------------------------------------------+
131  * ...
132  * +--------------------------------------------------+
133  * | Field Specifier |
134  * +--------------------------------------------------+
135  *
136  * Figure J: Template Record Format
137  *
138  * The format of the Template Record Header is shown in Figure K.
139  *
140  * 0 1 2 3
141  * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
142  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
143  * | Template ID (> 255) | Field Count |
144  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
145  *
146  * Figure K: Template Record Header Format
147  *
148  * The Template Record Header Field definitions are as follows:
149  *
150  * Template ID
151  *
152  * Each Template Record is given a unique Template ID in the range
153  * 256 to 65535. This uniqueness is local to the Transport Session
154  * and Observation Domain that generated the Template ID. Since
155  * Template IDs are used as Set IDs in the Sets they describe (see
156  * Section 3.4.3), values 0-255 are reserved for special Set types
157  * (e.g., Template Sets themselves), and Templates and Options
158  * Templates (see Section 3.4.2) cannot share Template IDs within a
159  * Transport Session and Observation Domain. There are no
160  * constraints regarding the order of the Template ID allocation. As
161  * Exporting Processes are free to allocate Template IDs as they see
162  * fit, Collecting Processes MUST NOT assume incremental Template
163  * IDs, or anything about the contents of a Template based on its
164  * Template ID alone.
165  *
166  * Field Count
167  *
168  * Number of fields in this Template Record.
169  */
170 
171 typedef struct {
174 
175 static inline u32 ipfix_id_count (u16 id, u16 count)
176 {
177  return clib_host_to_net_u32 ((id<<16) | count);
178 }
179 
180 /* Template packet */
181 typedef struct {
187 
188 #endif /* __included_ipfix_packet_h__ */
static u32 ipfix_e_id_length(int e, u16 id, u16 length)
Definition: ipfix_packet.h:72
static u32 version_length(u16 length)
Definition: ipfix_packet.h:31
static u32 ipfix_id_count(u16 id, u16 count)
Definition: ipfix_packet.h:175
unsigned int u32
Definition: types.h:88
size_t count
Definition: vapi.c:40
ipfix_message_header_t h
Definition: ipfix_packet.h:182
static u32 ipfix_set_id_length(u16 set_id, u16 length)
Definition: ipfix_packet.h:114
unsigned short u16
Definition: types.h:57
ipfix_template_header_t t
Definition: ipfix_packet.h:184
ipfix_set_header_t s
Definition: ipfix_packet.h:183