[newlib-cygwin] Cygwin: Add #define for IPTOS_DSCP_VA in <netinet/ip.h>

[Mark Geisert]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=6fde14c0e24aa7e6dd73ba96b8ec60962261e2d5

commit 6fde14c0e24aa7e6dd73ba96b8ec60962261e2d5
Author: Mark Geisert <mark@maxrnd.com>
Date:   Mon Sep 28 22:54:56 2026 -0700

    Cygwin: Add #define for IPTOS_DSCP_VA in <netinet/ip.h>
    
    Define IPTOS_DSCP_VA (0xb0) according to RFC 5865 to complete the DSCP
    code point definitions in <netinet/ip.h>. This fixes compilation for
    utilities like openbsd-netcat.
    
    I provide this patch to the Cygwin sources under the 2-clause BSD license.
    
    Signed-off-by: Michał Korczak <omikorin@disroot.org>
    Reviewed-by: Mark Geisert <mark@maxrnd.com>

Diff:
---
 winsup/cygwin/include/netinet/ip.h | 3 ++-
 winsup/cygwin/release/3.7.0        | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/include/netinet/ip.h b/winsup/cygwin/include/netinet/ip.h
index 5db1bd9ce..8b67a5c6e 100644
--- a/winsup/cygwin/include/netinet/ip.h
+++ b/winsup/cygwin/include/netinet/ip.h
@@ -83,7 +83,7 @@ struct ip {
 #define IP_MAXPACKET	65535	/* maximum packet size */
 
 /*
- * Definitions for DiffServ Codepoints as per RFC2474
+ * Definitions for DiffServ Codepoints as per RFC2474 and RFC5865.
  */
 #define IPTOS_DSCP_CS0		0x00
 #define IPTOS_DSCP_CS1		0x20
@@ -103,6 +103,7 @@ struct ip {
 #define IPTOS_DSCP_AF42		0x90
 #define IPTOS_DSCP_AF43		0x98
 #define IPTOS_DSCP_CS5		0xa0
+#define IPTOS_DSCP_VA		0xb0
 #define IPTOS_DSCP_EF		0xb8
 #define IPTOS_DSCP_CS6		0xc0
 #define IPTOS_DSCP_CS7		0xe0
diff --git a/winsup/cygwin/release/3.7.0 b/winsup/cygwin/release/3.7.0
index a18f0b3d9..7db780179 100644
--- a/winsup/cygwin/release/3.7.0
+++ b/winsup/cygwin/release/3.7.0
@@ -28,6 +28,8 @@ What's new:
 
 - Support for uid/gid passthrough for NFSv4 clients without involving LDAP.
 
+- Add #define for IPTOS_DSCP_VA in <netinet/ip.h>.
+
 
 Fixes:
 ------