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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __included_ipfix_packet_h__
#define __included_ipfix_packet_h__
#include <vnet/flow/ipfix_info_elements.h>
/* From RFC-7011:
* https://tools.ietf.org/html/rfc7011
*/
typedef struct {
u32 version_length;
u32 export_time;
u32 sequence_number;
u32 domain_id;
} ipfix_message_header_t;
static inline u32 version_length (u16 length)
{
return clib_host_to_net_u32 (0x000a0000 | length);
}
/*
* The Field Specifier format is shown in Figure G.
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |E| Information Element ident. | Field Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Enterprise Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Figure G: Field Specifier Format
*
* Where:
*
* E
*
* Enterprise bit. This is the first bit of the Field Specifier. If
* this bit is zero, the Information Element identifier identifies an
* Information Element in [IANA-IPFIX], and the four-octet Enterprise
* Number field MUST NOT be present. If this bit is one, the
* Information Element identifier identifies an enterprise-specific
* Information Element, and the Enterprise Number field MUST be
* present.
*/
typedef struct {
u32 e_id_length;
u32 enterprise;
} ipfix_enterprise_field_specifier_t;
typedef struct {
u32 e_id_length;
} ipfix_field_specifier_t;
static inline u32 ipfix_e_id_length (int e, u16 id, u16 length)
{
u32 value;
value = (e<<31) | ((id&0x7FFF) <<16) | length;
return clib_host_to_net_u32 (value);
}
/*
* Every Set contains a common header. This header is defined in
* Figure I.
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Set ID | Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Figure I: Set Header Format
*
* Each Set Header field is exported in network format. The fields are
* defined as follows:
*
* Set ID
*
* Identifies the Set. A value of 2 is reserved for Template Sets.
* A value of 3 is reserved for Options Template Sets. Values from 4
* to 255 are reserved for future use. Values 256 and above are used
* for Data Sets. The Set ID values of 0 and 1 are not used, for
* historical reasons [RFC3954].
*
* Length
*
* Total length of the Set, in octets, including the Set Header, all
* records, and the optional padding. Because an individual Set MAY
* contain multiple records, the Length value MUST be used to
* determine the position of the next Set.
*/
typedef struct {
u32 set_id_length;
} ipfix_set_header_t;
static inline u32 ipfix_set_id_length (u16 set_id, u16 length)
{
return clib_host_to_net_u32 ((set_id<<16) | length);
}
/*
* The format of the Template Record is shown in Figure J. It consists
* of a Template Record Header and one or more Field Specifiers. Field
* Specifiers are defined in Figure G above.
*
* +--------------------------------------------------+
* | Template Record Header |
* +--------------------------------------------------+
* | Field Specifier |
* +--------------------------------------------------+
* | Field Specifier |
* +--------------------------------------------------+
* ...
* +--------------------------------------------------+
* | Field Specifier |
* +--------------------------------------------------+
*
* Figure J: Template Record Format
*
* The format of the Template Record Header is shown in Figure K.
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Template ID (> 255) | Field Count |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Figure K: Template Record Header Format
*
* The Template Record Header Field definitions are as follows:
*
* Template ID
*
* Each Template Record is given a unique Template ID in the range
* 256 to 65535. This uniqueness is local to the Transport Session
* and Observation Domain that generated the Template ID. Since
* Template IDs are used as Set IDs in the Sets they describe (see
* Section 3.4.3), values 0-255 are reserved for special Set types
* (e.g., Template Sets themselves), and Templates and Options
* Templates (see Section 3.4.2) cannot share Template IDs within a
* Transport Session and Observation Domain. There are no
* constraints regarding the order of the Template ID allocation. As
* Exporting Processes are free to allocate Template IDs as they see
* fit, Collecting Processes MUST NOT assume incremental Template
* IDs, or anything about the contents of a Template based on its
* Template ID alone.
*
* Field Count
*
* Number of fields in this Template Record.
*/
typedef struct {
u32 id_count;
} ipfix_template_header_t;
static inline u32 ipfix_id_count (u16 id, u16 count)
{
return clib_host_to_net_u32 ((id<<16) | count);
}
/* Template packet */
typedef struct {
ipfix_message_header_t h;
ipfix_set_header_t s;
ipfix_template_header_t t;
ipfix_field_specifier_t fields[0];
} ipfix_template_packet_t;
#endif /* __included_ipfix_packet_h__ */
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