/* * Copyright 2011, Siemens AG * written by Alexander Smirnov <[email protected]> */ /* * Based on patches from Jon Smirl <[email protected]> * Copyright (c) 2011 Jon Smirl <[email protected]> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* Jon's code is based on 6lowpan implementation for Contiki which is: * Copyright (c) 2008, Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef __6LOWPAN_H__ #define __6LOWPAN_H__ #include <linux/debugfs.h> #include <net/ipv6.h> #include <net/net_namespace.h> /* special link-layer handling */ #include <net/mac802154.h> #define EUI64_ADDR_LEN … #define LOWPAN_NHC_MAX_ID_LEN … /* Maximum next header compression length which we currently support inclusive * possible inline data. */ #define LOWPAN_NHC_MAX_HDR_LEN … /* Max IPHC Header len without IPv6 hdr specific inline data. * Useful for getting the "extra" bytes we need at worst case compression. * * LOWPAN_IPHC + CID + LOWPAN_NHC_MAX_ID_LEN */ #define LOWPAN_IPHC_MAX_HEADER_LEN … /* Maximum worst case IPHC header buffer size */ #define LOWPAN_IPHC_MAX_HC_BUF_LEN … /* SCI/DCI is 4 bit width, so we have maximum 16 entries */ #define LOWPAN_IPHC_CTX_TABLE_SIZE … #define LOWPAN_DISPATCH_IPV6 … #define LOWPAN_DISPATCH_IPHC … #define LOWPAN_DISPATCH_IPHC_MASK … static inline bool lowpan_is_ipv6(u8 dispatch) { … } static inline bool lowpan_is_iphc(u8 dispatch) { … } #define LOWPAN_PRIV_SIZE(llpriv_size) … enum lowpan_lltypes { … }; enum lowpan_iphc_ctx_flags { … }; struct lowpan_iphc_ctx { … }; struct lowpan_iphc_ctx_table { … }; static inline bool lowpan_iphc_ctx_is_active(const struct lowpan_iphc_ctx *ctx) { … } static inline bool lowpan_iphc_ctx_is_compression(const struct lowpan_iphc_ctx *ctx) { … } struct lowpan_dev { … }; struct lowpan_802154_neigh { … }; static inline struct lowpan_802154_neigh *lowpan_802154_neigh(void *neigh_priv) { … } static inline struct lowpan_dev *lowpan_dev(const struct net_device *dev) { … } /* private device info */ struct lowpan_802154_dev { … }; static inline struct lowpan_802154_dev *lowpan_802154_dev(const struct net_device *dev) { … } struct lowpan_802154_cb { … }; static inline struct lowpan_802154_cb *lowpan_802154_cb(const struct sk_buff *skb) { … } static inline void lowpan_iphc_uncompress_eui64_lladdr(struct in6_addr *ipaddr, const void *lladdr) { … } static inline void lowpan_iphc_uncompress_eui48_lladdr(struct in6_addr *ipaddr, const void *lladdr) { … } #ifdef DEBUG /* print data in line */ static inline void raw_dump_inline(const char *caller, char *msg, const unsigned char *buf, int len) { if (msg) pr_debug("%s():%s: ", caller, msg); print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false); } /* print data in a table format: * * addr: xx xx xx xx xx xx * addr: xx xx xx xx xx xx * ... */ static inline void raw_dump_table(const char *caller, char *msg, const unsigned char *buf, int len) { if (msg) pr_debug("%s():%s:\n", caller, msg); print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false); } #else static inline void raw_dump_table(const char *caller, char *msg, const unsigned char *buf, int len) { … } static inline void raw_dump_inline(const char *caller, char *msg, const unsigned char *buf, int len) { … } #endif /** * lowpan_fetch_skb - getting inline data from 6LoWPAN header * * This function will pull data from sk buffer and put it into data to * remove the 6LoWPAN inline data. This function returns true if the * sk buffer is too small to pull the amount of data which is specified * by len. * * @skb: the buffer where the inline data should be pulled from. * @data: destination buffer for the inline data. * @len: amount of data which should be pulled in bytes. */ static inline bool lowpan_fetch_skb(struct sk_buff *skb, void *data, unsigned int len) { … } static inline bool lowpan_802154_is_valid_src_short_addr(__le16 addr) { … } static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data, const size_t len) { … } int lowpan_register_netdevice(struct net_device *dev, enum lowpan_lltypes lltype); int lowpan_register_netdev(struct net_device *dev, enum lowpan_lltypes lltype); void lowpan_unregister_netdevice(struct net_device *dev); void lowpan_unregister_netdev(struct net_device *dev); /** * lowpan_header_decompress - replace 6LoWPAN header with IPv6 header * * This function replaces the IPHC 6LoWPAN header which should be pointed at * skb->data and skb_network_header, with the IPv6 header. * It would be nice that the caller have the necessary headroom of IPv6 header * and greatest Transport layer header, this would reduce the overhead for * reallocate headroom. * * @skb: the buffer which should be manipulate. * @dev: the lowpan net device pointer. * @daddr: destination lladdr of mac header which is used for compression * methods. * @saddr: source lladdr of mac header which is used for compression * methods. */ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev, const void *daddr, const void *saddr); /** * lowpan_header_compress - replace IPv6 header with 6LoWPAN header * * This function replaces the IPv6 header which should be pointed at * skb->data and skb_network_header, with the IPHC 6LoWPAN header. * The caller need to be sure that the sk buffer is not shared and at have * at least a headroom which is smaller or equal LOWPAN_IPHC_MAX_HEADER_LEN, * which is the IPHC "more bytes than IPv6 header" at worst case. * * @skb: the buffer which should be manipulate. * @dev: the lowpan net device pointer. * @daddr: destination lladdr of mac header which is used for compression * methods. * @saddr: source lladdr of mac header which is used for compression * methods. */ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev, const void *daddr, const void *saddr); #endif /* __6LOWPAN_H__ */
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