ipv6_hdr_t Struct Reference

Data type to represent an IPv6 packet header. More...

Detailed Description

Data type to represent an IPv6 packet header.

The structure of the header is as follows:

                     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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| Traffic Class |           Flow Label                  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|         Payload Length        |  Next Header  |   Hop Limit   |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+                                                               +
|                                                               |
+                         Source Address                        +
|                                                               |
+                                                               +
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+                                                               +
|                                                               |
+                      Destination Address                      +
|                                                               |
+                                                               +
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

See also

RFC 8200, section 3

Definition at line 66 of file hdr.h.

#include <hdr.h>

Data Fields
network_uint32_t	v_tc_fl
	Version, traffic class, and flow label. More...
network_uint16_t	len
	payload length of this packet.
uint8_t	nh
	type of next header in this packet.
uint8_t	hl
	hop limit for this packet.
ipv6_addr_t	src
	source address of this packet.
ipv6_addr_t	dst
	destination address of this packet.

Field Documentation

v_tc_fl

network_uint32_t ipv6_hdr_t::v_tc_fl

Version, traffic class, and flow label.

The version are the 4 most significant bits, the traffic class the 8 next bit, and the remainding 20 bits are the flow label (see above).

This module provides helper functions to set, get, and check these fields accordingly:

• ipv6_hdr_set_version()
• ipv6_hdr_get_version()
• ipv6_hdr_is()
• ipv6_hdr_set_tc()
• ipv6_hdr_set_tc_ecn()
• ipv6_hdr_set_tc_dscp()
• ipv6_hdr_get_tc()
• ipv6_hdr_get_tc_ecn()
• ipv6_hdr_get_tc_dscp()
• ipv6_hdr_set_fl()
• ipv6_hdr_get_fl()

Definition at line 88 of file hdr.h.

---

The documentation for this struct was generated from the following file:

• sys/include/net/ipv6/hdr.h