Set DSCP marking for IPv6

Author: jedisct1

dnscrypt-proxy/setsockopts_darwin.go

@@ -11,6 +11,7 @@ func (proxy *Proxy) udpListenerConfig() (*net.ListenConfig, error) {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_DF, 0)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF, 4096)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, 4096)
 			})
@@ -24,6 +25,7 @@ func (proxy *Proxy) tcpListenerConfig() (*net.ListenConfig, error) {
 		Control: func(network, address string, c syscall.RawConn) error {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 			})
 			return nil
 		},

dnscrypt-proxy/setsockopts_freebsd.go

@@ -13,6 +13,7 @@ func (proxy *Proxy) udpListenerConfig() (*net.ListenConfig, error) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_BINDANY, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_DF, 0)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF, 4096)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, 4096)
 			})
@@ -28,6 +29,7 @@ func (proxy *Proxy) tcpListenerConfig() (*net.ListenConfig, error) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BINDANY, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_BINDANY, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 			})
 			return nil
 		},

dnscrypt-proxy/setsockopts_linux.go

@@ -12,6 +12,7 @@ func (proxy *Proxy) udpListenerConfig() (*net.ListenConfig, error) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_FREEBIND, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_DF, 0)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(
 					int(fd),
 					syscall.IPPROTO_IP,
@@ -32,6 +33,7 @@ func (proxy *Proxy) tcpListenerConfig() (*net.ListenConfig, error) {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_FREEBIND, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_QUICKACK, 1)
 			})
 			return nil

dnscrypt-proxy/setsockopts_openbsd.go

@@ -12,6 +12,7 @@ func (proxy *Proxy) udpListenerConfig() (*net.ListenConfig, error) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_BINDANY, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_DF, 0)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF, 4096)
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, 4096)
 			})
@@ -26,6 +27,7 @@ func (proxy *Proxy) tcpListenerConfig() (*net.ListenConfig, error) {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_BINDANY, 1)
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 			})
 			return nil
 		},

dnscrypt-proxy/setsockopts_windows.go

@@ -10,6 +10,7 @@ func (proxy *Proxy) udpListenerConfig() (*net.ListenConfig, error) {
 		Control: func(network, address string, c syscall.RawConn) error {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF, 4096)
 				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, 4096)
 			})
@@ -23,6 +24,7 @@ func (proxy *Proxy) tcpListenerConfig() (*net.ListenConfig, error) {
 		Control: func(network, address string, c syscall.RawConn) error {
 			_ = c.Control(func(fd uintptr) {
 				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, syscall.IP_TOS, 0x70)
+				_ = syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, 0x70)
 			})
 			return nil
 		},