/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (c) 2024 Pengutronix, Oleksij Rempel <[email protected]> */ #ifndef __DSCP_H__ #define __DSCP_H__ /* * DSCP Pools and Codepoint Space Division: * * The Differentiated Services (Diffserv) architecture defines a method for * classifying and managing network traffic using the DS field in IPv4 and IPv6 * packet headers. This field can carry one of 64 distinct DSCP (Differentiated * Services Code Point) values, which are divided into three pools based on * their Least Significant Bits (LSB) patterns and intended usage. Each pool has * a specific registration procedure for assigning DSCP values: * * Pool 1 (Standards Action Pool): * - Codepoint Space: xxxxx0 * This pool includes DSCP values ending in '0' (binary), allocated via * Standards Action. It is intended for globally recognized traffic classes, * ensuring interoperability across the internet. This pool encompasses * well-known DSCP values such as CS0-CS7, AFxx, EF, and VOICE-ADMIT. * * Pool 2 (Experimental/Local Use Pool): * - Codepoint Space: xxxx11 * Reserved for DSCP values ending in '11' (binary), this pool is designated * for Experimental or Local Use. It allows for private or temporary traffic * marking schemes not intended for standardized global use, facilitating * testing and network-specific configurations without impacting * interoperability. * * Pool 3 (Preferential Standardization Pool): * - Codepoint Space: xxxx01 * Initially reserved for experimental or local use, this pool now serves as * a secondary standardization resource should Pool 1 become exhausted. DSCP * values ending in '01' (binary) are assigned via Standards Action, with a * focus on adopting new, standardized traffic classes as the need arises. * * For pool updates see: * https://www.iana.org/assignments/dscp-registry/dscp-registry.xhtml */ /* Pool 1: Standardized DSCP values as per [RFC8126] */ #define DSCP_CS0 … /* CS0 is some times called default (DF) */ #define DSCP_DF … #define DSCP_CS1 … #define DSCP_CS2 … #define DSCP_CS3 … #define DSCP_CS4 … #define DSCP_CS5 … #define DSCP_CS6 … #define DSCP_CS7 … #define DSCP_AF11 … #define DSCP_AF12 … #define DSCP_AF13 … #define DSCP_AF21 … #define DSCP_AF22 … #define DSCP_AF23 … #define DSCP_AF31 … #define DSCP_AF32 … #define DSCP_AF33 … #define DSCP_AF41 … #define DSCP_AF42 … #define DSCP_AF43 … #define DSCP_EF … #define DSCP_VOICE_ADMIT … /* Pool 3: Standardized assignments, previously available for experimental/local * use */ #define DSCP_LE … #define DSCP_MAX … #endif /* __DSCP_H__ */
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