From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ahmed Amamou Subject: [RFC PATCH 01/24] net: rbridge: add trill frame description Date: Wed, 24 Sep 2014 17:51:57 +0200 Message-ID: <1411573940-14079-2-git-send-email-ahmed@gandi.net> References: <1411573940-14079-1-git-send-email-ahmed@gandi.net> Cc: william@gandi.net, f.cachereul@alphalink.fr, Ahmed Amamou , Emmanuel Hocdet , Kamel Haddadou To: netdev@vger.kernel.org Return-path: Received: from mail4.gandi.net ([217.70.183.210]:38926 "EHLO mail4.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753013AbaIXP6L (ORCPT ); Wed, 24 Sep 2014 11:58:11 -0400 In-Reply-To: <1411573940-14079-1-git-send-email-ahmed@gandi.net> Sender: netdev-owner@vger.kernel.org List-ID: add basic trill header description and basic header getter and setter fuctions Signed-off-by: Ahmed Amamou Signed-off-by: Emmanuel Hocdet Signed-off-by: Kamel Haddadou --- include/linux/if_trill.h | 89 +++++++++++++++++++++++++++++++++++++++++++ include/uapi/linux/if_ether.h | 1 + 2 files changed, 90 insertions(+) create mode 100644 include/linux/if_trill.h diff --git a/include/linux/if_trill.h b/include/linux/if_trill.h new file mode 100644 index 0000000..ad9c631 --- /dev/null +++ b/include/linux/if_trill.h @@ -0,0 +1,89 @@ +#ifndef _LINUX_IF_TRILL_H_ +#define _LINUX_IF_TRILL_H_ + +#include + +/* + * trill_hdr structure + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | V | R |M|op-Length| Hop Count | + *+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + *| Egress RBridge Nickname | Ingress RBridge Nickname | + *+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + */ + +struct trill_hdr { + __be16 th_flags; + __be16 th_egressnick; + __be16 th_ingressnick; +} __attribute__ ((packed)); + +static inline u16 trill_get_version(u16 trill_flags) +{ + return ((trill_flags >> 14) & 0x0003); +} + +static inline u16 trill_set_version(u16 trill_flags, u16 v) +{ + trill_flags |= ((v & 0x0003) << 14); + return trill_flags; +} + +static inline u16 trill_get_reserved(u16 trill_flags) +{ + return ((trill_flags >> 12) & 0x0003); +} + +static inline u16 trill_set_reserved(u16 trill_flags, u16 v) +{ + trill_flags |= ((v & 0x0003) << 12); + return trill_flags; +} + +static inline u16 trill_get_multidest(u16 trill_flags) +{ + return ((trill_flags >> 11) & 0x0001); +} + +static inline u16 trill_set_multidest(u16 trill_flags, u16 flag) +{ + trill_flags |= ((flag & 0x0001) << 11); + return trill_flags; +} + +/* len is in 4 bytes units << 2*/ +static inline size_t trill_get_optslen(u16 trill_flags) +{ + return (((trill_flags >> 6) & 0x001F) << 2); +} + +static inline u16 trill_set_optslen(u16 trill_flags, u16 len) +{ + trill_flags |= (((len >> 2) & 0x001F) << 6); + return trill_flags; +} + +static inline u16 trill_get_hopcount(u16 trill_flags) +{ + return (trill_flags & 0x003F); +} + +static inline u16 trill_set_hopcount(u16 trill_flags, u16 count) +{ + trill_flags |= (count & 0x003F); + return trill_flags; +} + +static inline void trillhdr_dec_hopcount(struct trill_hdr *trh) +{ + u8 *flags = (u8 *) & (trh->th_flags); + if (flags[1] & 0x3F) + flags[1] -= 1; +} + +static inline size_t trill_header_len(struct trill_hdr *trh) +{ + return (sizeof(*trh) + trill_get_optslen(ntohs(trh->th_flags))); +} +#endif /* !(_LINUX_IF_TRILL_H_) */ diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h index 0f8210b..a9eb2f2 100644 --- a/include/uapi/linux/if_ether.h +++ b/include/uapi/linux/if_ether.h @@ -48,6 +48,7 @@ #define ETH_P_BPQ 0x08FF /* G8BPQ AX.25 Ethernet Packet [ NOT AN OFFICIALLY REGISTERED ID ] */ #define ETH_P_IEEEPUP 0x0a00 /* Xerox IEEE802.3 PUP packet */ #define ETH_P_IEEEPUPAT 0x0a01 /* Xerox IEEE802.3 PUP Addr Trans packet */ +#define ETH_P_TRILL 0x22F3 /* TRILL frames RFC 6325 */ #define ETH_P_BATMAN 0x4305 /* B.A.T.M.A.N.-Advanced packet [ NOT AN OFFICIALLY REGISTERED ID ] */ #define ETH_P_DEC 0x6000 /* DEC Assigned proto */ #define ETH_P_DNA_DL 0x6001 /* DEC DNA Dump/Load */ -- 1.9.1