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From be8ed13a90c528adfbe3c8543946bb2c5a2ad713 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Mon, 25 Aug 2014 15:50:36 -0700
Subject: [PATCH] Define IPTOS_CLASS_* macros according to RFC 2474
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Upstream-status: Pending
---
include/netinet/ip.h | 42 ++++++++++++++++++++++++++++++------------
1 file changed, 30 insertions(+), 12 deletions(-)
diff --git a/include/netinet/ip.h b/include/netinet/ip.h
index 19e1249..3fe58b9 100644
--- a/include/netinet/ip.h
+++ b/include/netinet/ip.h
@@ -188,7 +188,25 @@ struct ip_timestamp
#define IPTOS_DSCP_EF 0xb8
/*
- * Definitions for IP type of service (ip_tos)
+ * In RFC 2474, Section 4.2.2.1, the Class Selector Codepoints subsume
+ * the old ToS Precedence values.
+ */
+#define IPTOS_CLASS_MASK 0xe0
+#define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK)
+#define IPTOS_CLASS_CS0 0x00
+#define IPTOS_CLASS_CS1 0x20
+#define IPTOS_CLASS_CS2 0x40
+#define IPTOS_CLASS_CS3 0x60
+#define IPTOS_CLASS_CS4 0x80
+#define IPTOS_CLASS_CS5 0xa0
+#define IPTOS_CLASS_CS6 0xc0
+#define IPTOS_CLASS_CS7 0xe0
+
+#define IPTOS_CLASS_DEFAULT IPTOS_CLASS_CS0
+
+/*
+ * Definitions for IP type of service (ip_tos) [deprecated; use DSCP
+ * and CS definitions above instead.]
*/
#define IPTOS_TOS_MASK 0x1E
#define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK)
@@ -199,18 +217,18 @@ struct ip_timestamp
#define IPTOS_MINCOST IPTOS_LOWCOST
/*
- * Definitions for IP precedence (also in ip_tos) (hopefully unused)
+ * Definitions for IP precedence (also in ip_tos) [also deprecated.]
*/
-#define IPTOS_PREC_MASK 0xe0
-#define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK)
-#define IPTOS_PREC_NETCONTROL 0xe0
-#define IPTOS_PREC_INTERNETCONTROL 0xc0
-#define IPTOS_PREC_CRITIC_ECP 0xa0
-#define IPTOS_PREC_FLASHOVERRIDE 0x80
-#define IPTOS_PREC_FLASH 0x60
-#define IPTOS_PREC_IMMEDIATE 0x40
-#define IPTOS_PREC_PRIORITY 0x20
-#define IPTOS_PREC_ROUTINE 0x00
+#define IPTOS_PREC_MASK IPTOS_CLASS_MASK
+#define IPTOS_PREC(tos) IPTOS_CLASS(tos)
+#define IPTOS_PREC_NETCONTROL IPTOS_CLASS_CS7
+#define IPTOS_PREC_INTERNETCONTROL IPTOS_CLASS_CS6
+#define IPTOS_PREC_CRITIC_ECP IPTOS_CLASS_CS5
+#define IPTOS_PREC_FLASHOVERRIDE IPTOS_CLASS_CS4
+#define IPTOS_PREC_FLASH IPTOS_CLASS_CS3
+#define IPTOS_PREC_IMMEDIATE IPTOS_CLASS_CS2
+#define IPTOS_PREC_PRIORITY IPTOS_CLASS_CS1
+#define IPTOS_PREC_ROUTINE IPTOS_CLASS_CS0
/*
* Definitions for options.
--
2.1.0
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