| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* Copyright (c) 2024 Pengutronix, Oleksij Rempel <kernel@pengutronix.de> */ |
| |
| #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 0 /* 000000, [RFC2474] */ |
| /* CS0 is some times called default (DF) */ |
| #define DSCP_DF 0 /* 000000, [RFC2474] */ |
| #define DSCP_CS1 8 /* 001000, [RFC2474] */ |
| #define DSCP_CS2 16 /* 010000, [RFC2474] */ |
| #define DSCP_CS3 24 /* 011000, [RFC2474] */ |
| #define DSCP_CS4 32 /* 100000, [RFC2474] */ |
| #define DSCP_CS5 40 /* 101000, [RFC2474] */ |
| #define DSCP_CS6 48 /* 110000, [RFC2474] */ |
| #define DSCP_CS7 56 /* 111000, [RFC2474] */ |
| #define DSCP_AF11 10 /* 001010, [RFC2597] */ |
| #define DSCP_AF12 12 /* 001100, [RFC2597] */ |
| #define DSCP_AF13 14 /* 001110, [RFC2597] */ |
| #define DSCP_AF21 18 /* 010010, [RFC2597] */ |
| #define DSCP_AF22 20 /* 010100, [RFC2597] */ |
| #define DSCP_AF23 22 /* 010110, [RFC2597] */ |
| #define DSCP_AF31 26 /* 011010, [RFC2597] */ |
| #define DSCP_AF32 28 /* 011100, [RFC2597] */ |
| #define DSCP_AF33 30 /* 011110, [RFC2597] */ |
| #define DSCP_AF41 34 /* 100010, [RFC2597] */ |
| #define DSCP_AF42 36 /* 100100, [RFC2597] */ |
| #define DSCP_AF43 38 /* 100110, [RFC2597] */ |
| #define DSCP_EF 46 /* 101110, [RFC3246] */ |
| #define DSCP_VOICE_ADMIT 44 /* 101100, [RFC5865] */ |
| |
| /* Pool 3: Standardized assignments, previously available for experimental/local |
| * use |
| */ |
| #define DSCP_LE 1 /* 000001, [RFC8622] */ |
| |
| #define DSCP_MAX 64 |
| |
| #endif /* __DSCP_H__ */ |
