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net: ipv4: Add DiffServ DSCP code point definitions

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Add DSCP defines for cases where the IPv4 packets need
classification.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2025-02-28 15:41:24 +02:00 committed by Benjamin Cabé
parent 0a0297229d
commit f7d37ea87c
1 changed files with 20 additions and 0 deletions
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20
subsys/net/ip/ipv4.h
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@ -25,6 +25,26 @@
#define NET_IPV4_DSCP_OFFSET 2
#define NET_IPV4_ECN_MASK 0x03
/* IPv4 DiffServ code points (DSCP) for Assured Forwarding (AF) group.
* See https://tools.ietf.org/html/rfc2597
* https://en.wikipedia.org/wiki/Differentiated_services
*/
/* Drop probability low */
#define NET_IPV4_DSCP_AF11 10 /* 001010 */ /* Class 1 */
#define NET_IPV4_DSCP_AF21 18 /* 010010 */ /* Class 2 */
#define NET_IPV4_DSCP_AF31 26 /* 011010 */ /* Class 3 */
#define NET_IPV4_DSCP_AF41 34 /* 100010 */ /* Class 4 */
/* Drop probability medium */
#define NET_IPV4_DSCP_AF12 12 /* 001100 */ /* Class 1 */
#define NET_IPV4_DSCP_AF22 20 /* 010100 */ /* Class 2 */
#define NET_IPV4_DSCP_AF32 28 /* 011100 */ /* Class 3 */
#define NET_IPV4_DSCP_AF42 36 /* 100100 */ /* Class 4 */
/* Drop probability high */
#define NET_IPV4_DSCP_AF13 14 /* 001110 */ /* Class 1 */
#define NET_IPV4_DSCP_AF23 22 /* 010110 */ /* Class 2 */
#define NET_IPV4_DSCP_AF33 30 /* 011110 */ /* Class 3 */
#define NET_IPV4_DSCP_AF43 38 /* 100110 */ /* Class 4 */
/* IPv4 Options */
#define NET_IPV4_OPTS_EO 0 /* End of Options */
#define NET_IPV4_OPTS_NOP 1 /* No operation */