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[69.196.128.153]) by smtp.gmail.com with ESMTPSA id d9sm2979465qth.34.2020.03.19.19.39.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Mar 2020 19:39:19 -0700 (PDT) From: Alexander Aring To: davem@davemloft.net Cc: kuznet@ms2.inr.ac.ru, yoshfuji@linux-ipv6.org, kuba@kernel.org, dav.lebrun@gmail.com, mcr@sandelman.ca, stefan@datenfreihafen.org, kai.beckmann@hs-rm.de, martin.gergeleit@hs-rm.de, robert.kaiser@hs-rm.de, netdev@vger.kernel.org, Alexander Aring Subject: [PATCHv2 net-next 1/5] include: uapi: linux: add rpl sr header definition Date: Thu, 19 Mar 2020 22:38:57 -0400 Message-Id: <20200320023901.31129-2-alex.aring@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200320023901.31129-1-alex.aring@gmail.com> References: <20200320023901.31129-1-alex.aring@gmail.com> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds a uapi header for rpl struct definition. The segments data can be accessed over rpl_segaddr or rpl_segdata macros. In case of compri and compre is zero the segment data is not compressed and can be accessed by rpl_segaddr. In the other case the compressed data can be accessed by rpl_segdata and interpreted as byte array. Signed-off-by: Alexander Aring --- include/uapi/linux/rpl.h | 48 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 include/uapi/linux/rpl.h diff --git a/include/uapi/linux/rpl.h b/include/uapi/linux/rpl.h new file mode 100644 index 000000000000..1dccb55cf8c6 --- /dev/null +++ b/include/uapi/linux/rpl.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ +/* + * IPv6 RPL-SR implementation + * + * Author: + * (C) 2020 Alexander Aring + */ + +#ifndef _UAPI_LINUX_RPL_H +#define _UAPI_LINUX_RPL_H + +#include +#include +#include + +/* + * RPL SR Header + */ +struct ipv6_rpl_sr_hdr { + __u8 nexthdr; + __u8 hdrlen; + __u8 type; + __u8 segments_left; +#if defined(__LITTLE_ENDIAN_BITFIELD) + __u32 cmpre:4, + cmpri:4, + reserved:4, + pad:4, + reserved1:16; +#elif defined(__BIG_ENDIAN_BITFIELD) + __u32 reserved:20, + pad:4, + cmpri:4, + cmpre:4; +#else +#error "Please fix " +#endif + + union { + struct in6_addr addr[0]; + __u8 data[0]; + } segments; +} __attribute__((packed)); + +#define rpl_segaddr segments.addr +#define rpl_segdata segments.data + +#endif