[newlib-cygwin] Allow to specify PCP on packets not belonging to any VLAN.

[newlib-cygwin] Allow to specify PCP on packets not belonging to any VLAN.

[Sebastian Huber]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b0250c735673311c2d5d268257bc379792a275f8

commit b0250c735673311c2d5d268257bc379792a275f8
Author: kib <kib@FreeBSD.org>
Date:   Tue Mar 27 15:29:32 2018 +0000

    Allow to specify PCP on packets not belonging to any VLAN.
    
    According to 802.1Q-2014, VLAN tagged packets with VLAN id 0 should be
    considered as untagged, and only PCP and DEI values from the VLAN tag
    are meaningful.  See for instance
    https://www.cisco.com/c/en/us/td/docs/switches/connectedgrid/cg-switch-sw-master/software/configuration/guide/vlan0/b_vlan_0.html.
    
    Make it possible to specify PCP value for outgoing packets on an
    ethernet interface.  When PCP is supplied, the tag is appended, VLAN
    id set to 0, and PCP is filled by the supplied value.  The code to do
    VLAN tag encapsulation is refactored from the if_vlan.c and moved into
    if_ethersubr.c.
    
    Drivers might have issues with filtering VID 0 packets on
    receive.  This bug should be fixed for each driver.
    
    Reviewed by:	ae (previous version), hselasky, melifaro
    Sponsored by:	Mellanox Technologies
    MFC after:	2 weeks
    Differential revision:	https://reviews.freebsd.org/D14702

Diff:
---
 newlib/libc/sys/rtems/include/net/if.h     | 3 +++
 newlib/libc/sys/rtems/include/sys/sockio.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/newlib/libc/sys/rtems/include/net/if.h b/newlib/libc/sys/rtems/include/net/if.h
index b73c9f6..d13e737 100644
--- a/newlib/libc/sys/rtems/include/net/if.h
+++ b/newlib/libc/sys/rtems/include/net/if.h
@@ -416,6 +416,7 @@ struct	ifreq {
 #define	ifr_index	ifr_ifru.ifru_index	/* interface index */
 #define	ifr_fib		ifr_ifru.ifru_fib	/* interface fib */
 #define	ifr_vlan_pcp	ifr_ifru.ifru_vlan_pcp	/* VLAN priority */
+#define	ifr_lan_pcp	ifr_ifru.ifru_vlan_pcp	/* VLAN priority */
 };
 
 #define	_SIZEOF_ADDR_IFREQ(ifr) \
@@ -565,6 +566,8 @@ struct ifrsshash {
 	uint32_t	ifrh_types;		/* RSS_TYPE_ */
 };
 
+#define	IFNET_PCP_NONE	0xff	/* PCP disabled */
+
 #endif /* __BSD_VISIBLE */
 
 #ifdef _KERNEL
diff --git a/newlib/libc/sys/rtems/include/sys/sockio.h b/newlib/libc/sys/rtems/include/sys/sockio.h
index a81a563..1ef52c4 100644
--- a/newlib/libc/sys/rtems/include/sys/sockio.h
+++ b/newlib/libc/sys/rtems/include/sys/sockio.h
@@ -140,4 +140,7 @@
 #define	SIOCGIFRSSHASH	_IOWR('i', 151, struct ifrsshash)/* get the current RSS
 							type/func settings */
 
+#define	SIOCGLANPCP	_IOWR('i', 152, struct ifreq)	/* Get (V)LAN PCP */
+#define	SIOCSLANPCP	 _IOW('i', 153, struct ifreq)	/* Set (V)LAN PCP */
+
 #endif /* !_SYS_SOCKIO_H_ */