/**************************************************************************** * net/sixlowpan/sixlowpan_internal.h * * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 2017 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Parts of this file derive from Contiki: * * Copyright (c) 2008, Swedish Institute of Computer Science * All rights reserved. * * Additional fixes for AVR contributed by: * Colin O'Flynn coflynn@newae.com * Eric Gnoske egnoske@gmail.com * Blake Leverett bleverett@gmail.com * Mike Vidales mavida404@gmail.com * Kevin Brown kbrown3@uccs.edu * Nate Bohlmann nate@elfwerks.com * * Additional fixes for MSP430 contributed by: * Joakim Eriksson * Niclas Finne * Nicolas Tsiftes * * 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 copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 __NET_SIXLOWPAN_SIXLOWPAN_INTERNAL_H #define __NET_SIXLOWPAN_SIXLOWPAN_INTERNAL_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #ifdef CONFIG_NET_6LOWPAN /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Copy a generic address */ #define sixlowpan_anyaddrcopy(dest,src,len) \ memcpy(dest, src, len) #ifdef CONFIG_WIRELESS_IEEE802154 /* IEEE 802.15.4 address macros * * Copy a an IEEE 802.15.4 address. */ #define sixlowpan_saddrcopy(dest,src) \ sixlowpan_anyaddrcopy(dest,src,NET_6LOWPAN_SADDRSIZE) #define sixlowpan_eaddrcopy(dest,src) \ sixlowpan_anyaddrcopy(dest,src,NET_6LOWPAN_EADDRSIZE) #define sixlowpan_addrcopy(dest,src) \ sixlowpan_anyaddrcopy(dest,src,NET_6LOWPAN_ADDRSIZE) #endif /* General helper macros ****************************************************/ /* GET 16-bit data: source in network order */ #define GETUINT16(ptr,index) \ ((uint16_t)((((uint16_t)((ptr)[index])) << 8) | ((uint16_t)(((ptr)[(index) + 1]))))) /* PUT 16-bit data: source in host order, result in network order */ #define PUTHOST16(ptr,index,value) \ do \ { \ (ptr)[index] = ((uint16_t)(value) >> 8) & 0xff; \ (ptr)[index + 1] = (uint16_t)(value) & 0xff; \ } \ while (0) /* Return values ************************************************************/ /* Successful return values from header compression logic */ #define COMPRESS_HDR_INLINE 0 /* L2 header not compressed */ #define COMPRESS_HDR_ELIDED 1 /* L2 header compressed */ /* Memory Pools *************************************************************/ #define REASS_POOL_PREALLOCATED 0 #define REASS_POOL_DYNAMIC 1 #define REASS_POOL_RADIO 2 /* Debug ********************************************************************/ #ifdef CONFIG_NET_6LOWPAN_DUMPBUFFER # define sixlowpan_dumpbuffer(m,b,s) ninfodumpbuffer(m,b,s) #else # define sixlowpan_dumpbuffer(m,b,s) #endif /**************************************************************************** * Public Types ****************************************************************************/ /* IPv6 TCP/UDP/ICMPv6 Definitions ******************************************/ #ifdef CONFIG_NET_TCP /* IPv6 + TCP header. Cast compatible based on IPv6 protocol field. */ struct ipv6tcp_hdr_s { struct ipv6_hdr_s ipv6; struct tcp_hdr_s tcp; }; #endif #ifdef CONFIG_NET_UDP /* IPv6 + UDP header */ struct ipv6udp_hdr_s { struct ipv6_hdr_s ipv6; struct udp_hdr_s udp; }; #endif #ifdef CONFIG_NET_ICMPv6 /* IPv6 + ICMPv6 header */ struct ipv6icmp_hdr_s { struct ipv6_hdr_s ipv6; struct icmpv6_iphdr_s icmp; }; #endif #ifdef CONFIG_WIRELESS_IEEE802154 /* In order to provide a customizable IEEE 802.15.4 MAC header, a structure * of meta data is passed to the MAC network driver, struct * ieee802154_frame_meta_s. Many of the settings in this meta data are * fixed, determined by the 6LoWPAN configuration. Other settings depend * on the protocol used in the current packet or on chacteristics of the * destination node. * * The following structure is used to summarize those per-packet * customizations and, along, with the fixed configuration settings, * determines the full form of that meta data. */ struct ieee802_txmetadata_s { uint8_t sextended : 1; /* Extended source address */ uint8_t dextended : 1; /* Extended destination address */ uint8_t xmits; /* Max MAC transmisstion */ uint8_t dpanid[IEEE802154_PANIDSIZE]; /* Destination PAN ID */ struct netdev_maxaddr_s source; /* Source IEEE 802.15.4 address */ struct netdev_maxaddr_s dest; /* Destination IEEE 802.15.4 address */ }; #endif /* This structure holds the packet metadata as a union when multiple * different radio types are supported. */ union sixlowpan_metadata_u { #ifdef CONFIG_WIRELESS_IEEE802154 struct ieee802154_frame_meta_s ieee802154; #endif #ifdef CONFIG_WIRELESS_PKTRADIO struct pktradio_metadata_s pktradio; #endif }; /**************************************************************************** * Public Data ****************************************************************************/ /* The following data values are used to hold intermediate settings while * processing IEEE802.15.4 frames. These globals are shared with incoming * and outgoing frame processing and possibly with multiple IEEE802.15.4 MAC * devices. The network lock provides exclusive use of these globals * during that processing. */ /* g_uncomp_hdrlen is the length of the headers before compression (if HC2 * is used this includes the UDP header in addition to the IP header). */ extern uint8_t g_uncomp_hdrlen; /* g_frame_hdrlen is the total length of (the processed) 6lowpan headers * (fragment headers, IPV6 or HC1, HC2, and HC1 and HC2 non compressed * fields). */ extern uint8_t g_frame_hdrlen; /**************************************************************************** * Public Types ****************************************************************************/ /**************************************************************************** * Public Function Prototypes ****************************************************************************/ struct net_driver_s; /* Forward reference */ struct radio_driver_s; /* Forward reference */ struct devif_callback_s; /* Forward reference */ struct ipv6_hdr_s; /* Forward reference */ struct netdev_varaddr_s; /* Forward reference */ struct iob_s; /* Forward reference */ /**************************************************************************** * Name: sixlowpan_send * * Description: * Process an outgoing UDP or ICMPv6 packet. Takes an IP packet and * formats it to be sent on an 802.15.4 network using 6lowpan. Called * from common UDP/ICMPv6 send logic. * * The payload data is in the caller 'buf' and is of length 'buflen'. * Compressed headers will be added and if necessary the packet is * fragmented. The resulting packet/fragments are submitted to the MAC * via the network driver r_req_data method. * * Input Parameters: * dev - The IEEE802.15.4 MAC network driver interface. * list - Head of callback list for send event handler * ipv6hdr - IPv6 header followed by UDP or ICMPv6 header. * buf - Data to send * len - Length of data to send * destmac - The IEEE802.15.4 MAC address of the destination * timeout - Send timeout in milliseconds * * Returned Value: * Ok is returned on success; Otherwise a negated errno value is returned. * This function is expected to fail if the driver is not an IEEE802.15.4 * MAC network driver. In that case, the logic will fall back to normal * IPv4/IPv6 formatting. * * Assumptions: * Called with the network locked. * ****************************************************************************/ int sixlowpan_send(FAR struct net_driver_s *dev, FAR struct devif_callback_s **list, FAR struct devif_callback_s **list_tail, FAR const struct ipv6_hdr_s *ipv6hdr, FAR const void *buf, size_t len, FAR const struct netdev_varaddr_s *destmac, unsigned int timeout); /**************************************************************************** * Name: sixlowpan_meta_data * * Description: * Based on the collected attributes and addresses, construct the MAC meta * data structure that we need to interface with the IEEE802.15.4 MAC. * * Input Parameters: * radio - Reference to a radio network driver state instance. * pktmeta - Meta-data specific to the current outgoing frame * meta - Location to return the corresponding meta data reference * (obfuscated). * * Returned Value: * Ok is returned on success; Otherwise a negated errno value is returned. * * Assumptions: * Called with the network locked. * ****************************************************************************/ #ifdef CONFIG_WIRELESS_IEEE802154 int sixlowpan_meta_data(FAR struct radio_driver_s *radio, FAR const struct ieee802_txmetadata_s *pktmeta, FAR struct ieee802154_frame_meta_s *meta); #endif /**************************************************************************** * Name: sixlowpan_frame_hdrlen * * Description: * This function is before the first frame has been sent in order to * determine what the size of the IEEE802.15.4 header will be. No frame * buffer is required to make this determination. * * Input Parameters: * radio - Reference to a radio network driver state instance. * meta - obfuscated meta data that describes the MAC header * * Returned Value: * The frame header length is returned on success; otherwise, a negated * errno value is return on failure. * ****************************************************************************/ int sixlowpan_frame_hdrlen(FAR struct radio_driver_s *radio, FAR const void *meta); /**************************************************************************** * Name: sixlowpan_frame_submit * * Description: * This function is called after eiether (1) the IEEE802.15.4 MAC driver * polls for TX data or (2) after the IEEE802.15.4 MAC driver provides a * new incoming frame and the network responds with an outgoing packet. It * submits any new outgoing frame to the MAC. * * Input Parameters: * radio - Reference to a radio network driver state instance. * meta - Obfuscated metadata that describes the MAC header * frame - The IOB containing the frame to be submitted. * * Returned Value: * Zero (OK) is returned on success; otherwise, a negated errno value is * return on any failure. * ****************************************************************************/ int sixlowpan_frame_submit(FAR struct radio_driver_s *radio, FAR const void *meta, FAR struct iob_s *frame); /**************************************************************************** * Name: sixlowpan_queue_frames * * Description: * Process an outgoing UDP or TCP packet. This function is called from * the send event handler when a TX poll is received. It formats the * list of frames to be sent by the IEEE802.15.4 MAC driver. * * The payload data is in the caller 'buf' and is of length 'buflen'. * Compressed headers will be added and if necessary the packet is * fragmented. The resulting packet/fragments are submitted to the MAC * via the network driver r_req_data method. * * Input Parameters: * radio - Reference to a radio network driver state instance. * ipv6 - IPv6 header followed by TCP or UDP header. * buf - Beginning of the packet packet to send (with IPv6 + protocol * headers) * buflen - Length of data to send (includes IPv6 and protocol headers) * destmac - The IEEE802.15.4 MAC address of the destination * * Returned Value: * Ok is returned on success; Otherwise a negated errno value is returned. * This function is expected to fail if the driver is not an IEEE802.15.4 * MAC network driver. In that case, the UDP/TCP will fall back to normal * IPv4/IPv6 formatting. * * Assumptions: * Called with the network locked. * ****************************************************************************/ int sixlowpan_queue_frames(FAR struct radio_driver_s *radio, FAR const struct ipv6_hdr_s *ipv6, FAR const void *buf, size_t buflen, FAR const struct netdev_varaddr_s *destmac); /**************************************************************************** * Name: sixlowpan_hc06_initialize * * Description: * sixlowpan_hc06_initialize() is called during OS initialization at * power-up reset. It is called from the common sixlowpan_initialize() * function. sixlowpan_hc06_initialize() configures HC06 networking data * structures. It is called prior to platform-specific driver * initialization so that the 6LoWPAN networking subsystem is prepared to * deal with network driver initialization actions. * * Input Parameters: * None * * Returned Value: * None * ****************************************************************************/ #ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06 void sixlowpan_hc06_initialize(void); #endif /**************************************************************************** * Name: sixlowpan_compresshdr_hc06 * * Description: * Compress IP/UDP header * * This function is called by the 6lowpan code to create a compressed * 6lowpan packet in the packetbuf buffer from a full IPv6 packet in the * uip_buf buffer. * * HC-06: * * Originally draft-ietf-6lowpan-hc, version 6: * http://tools.ietf.org/html/draft-ietf-6lowpan-hc-06, * * Updated to: * * RFC 6282: * https://tools.ietf.org/html/rfc6282 * * NOTE: sixlowpan_compresshdr_hc06() does not support ISA100_UDP header * compression * * Input Parameters: * radio - Reference to a radio network driver state instance. * ipv6 - The IPv6 header to be compressed * destmac - L2 destination address, needed to compress the IP * destination field * fptr - Pointer to frame to be compressed. * * Returned Value: * On success the indications of the defines COMPRESS_HDR_* are returned. * A negated errno value is returned on failure. * ****************************************************************************/ #ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06 int sixlowpan_compresshdr_hc06(FAR struct radio_driver_s *radio, FAR const struct ipv6_hdr_s *ipv6, FAR const struct netdev_varaddr_s *destmac, FAR uint8_t *fptr); #endif /**************************************************************************** * Name: sixlowpan_uncompresshdr_hc06 * * Description: * Uncompress HC06 (i.e., IPHC and LOWPAN_UDP) headers and put them in * sixlowpan_buf * * This function is called by the input function when the dispatch is HC06. * We process the frame in the IOB buffer, uncompress the header fields, * and copy the result into the driver packet buffer. At the end of the * decompression, g_frame_hdrlen and g_uncompressed_hdrlen are set to the * appropriate values * * Input Parameters: * radio - Reference to a radio network driver state instance. * metadata - Obfuscated MAC metadata including node addressing * information. * iplen - Equal to 0 if the packet is not a fragment (IP length is * then inferred from the L2 length), non 0 if the packet is * a first fragment. * iob - Pointer to the IOB containing the received frame. * fptr - Pointer to frame to be compressed. * bptr - Output goes here. Normally this is a known offset into * d_buf, may be redirected to a "bitbucket" on the case of * FRAGN frames. * * Returned Value: * None * ****************************************************************************/ #ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06 void sixlowpan_uncompresshdr_hc06(FAR struct radio_driver_s *radio, FAR const void *metadata, uint16_t iplen, FAR struct iob_s *iob, FAR uint8_t *fptr, FAR uint8_t *bptr); #endif /**************************************************************************** * Name: sixlowpan_compresshdr_hc1 * * Description: * Compress IP/UDP header using HC1 and HC_UDP * * This function is called by the 6lowpan code to create a compressed * 6lowpan packet in the packetbuf buffer from a full IPv6 packet in the * uip_buf buffer. * * Input Parameters: * radio - Reference to a radio network driver state instance. * ipv6 - The IPv6 header to be compressed * destmac - L2 destination address, needed to compress the IP * destination field * fptr - Pointer to frame to be compressed. * * Returned Value: * On success the indications of the defines COMPRESS_HDR_* are returned. * A negated errno value is returned on failure. * ****************************************************************************/ #ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1 int sixlowpan_compresshdr_hc1(FAR struct radio_driver_s *radio, FAR const struct ipv6_hdr_s *ipv6, FAR const struct netdev_varaddr_s *destmac, FAR uint8_t *fptr); #endif /**************************************************************************** * Name: sixlowpan_uncompresshdr_hc1 * * Description: * Uncompress HC1 (and HC_UDP) headers and put them in sixlowpan_buf * * This function is called by the input function when the dispatch is * HC1. It processes the frame in the IOB buffer, uncompresses the * header fields, and copies the result in the packet buffer. At the * end of the decompression, g_frame_hdrlen and uncompressed_hdr_len * are set to the appropriate values * * Input Parameters: * radio - Reference to a radio network driver state instance. * metadata - Obfuscated MAC metadata including node addressing * information. * iplen - Equal to 0 if the packet is not a fragment (IP length is * then inferred from the L2 length), non 0 if the packet is * a 1st fragment. * iob - Pointer to the IOB containing the received frame. * fptr - Pointer to frame to be uncompressed. * bptr - Output goes here. Normally this is a known offset into * d_buf, may be redirected to a "bitbucket" on the case of * FRAGN frames. * * Returned Value: * Zero (OK) is returned on success, on failure a negated errno value is * returned. * ****************************************************************************/ #ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1 int sixlowpan_uncompresshdr_hc1(FAR struct radio_driver_s *radio, FAR const void *metadata, uint16_t iplen, FAR struct iob_s *iob, FAR uint8_t *fptr, FAR uint8_t *bptr); #endif /**************************************************************************** * Name: sixlowpan_nexthopaddr * * Description: * sixlowpan_nexthopaddr(): If the destination is on-link, extract the * IEEE 802.15.14 destination address from the destination IP address. If * the destination is not reachable directly, use the routing table (if * available) or fall back to the default router IP address and use the * router IP address to derive the IEEE 802.15.4 MAC address. * ****************************************************************************/ int sixlowpan_nexthopaddr(FAR struct radio_driver_s *radio, FAR const net_ipv6addr_t ipaddr, FAR struct netdev_varaddr_s *destaddr); /**************************************************************************** * Name: sixlowpan_islinklocal, sixlowpan_destaddrfromip, and * sixlowpan_ismacbased * * Description: * sixlowpan_destaddrfromip(): Extract the IEEE 802.15.14 destination * address from a MAC-based destination IPv6 address. This function * handles a tagged address union which may either a short or and * extended destination address. * * In the case there the IEEE 802.15.4 node functions as an endpoint in a * start topology, the destination address will, instead, be the address * of the star hub (which is assumed to be the address of the coordinator). * * sixlowpan_ipfrom[s|e]addr(): Create a link-local, MAC-based IPv6 * address from an IEEE802.15.4 short address (saddr) or extended address * (eaddr). * * sixlowpan_islinklocal() and sixlowpan_ismacbased() will return true for * address created in this fashion. sixlowpan_destaddrfromip() is * intended to handle a tagged address or any size. Local addresses are * of a fixed but configurable size and sixlowpan_isaddrbased() is for use * with such local addresses. * * 128 112 96 80 64 48 32 16 * ---- ---- ---- ---- ---- ---- ---- ---- * fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE * 48-bit MAC * fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE * EUI-64 * ****************************************************************************/ #define sixlowpan_islinklocal(ipaddr) ((ipaddr)[0] == NTOHS(0xfe80)) int sixlowpan_destaddrfromip(FAR struct radio_driver_s *radio, const net_ipv6addr_t ipaddr, FAR struct netdev_varaddr_s *addr); void sixlowpan_ipfromaddr(FAR const struct netdev_varaddr_s *addr, FAR net_ipv6addr_t ipaddr); bool sixlowpan_ismacbased(const net_ipv6addr_t ipaddr, FAR const struct netdev_varaddr_s *addr); /**************************************************************************** * Name: sixlowpan_radio_framelen * * Description: * Get the maximum frame length supported by radio network driver. * * Input Parameters: * radio - Reference to a radio network driver state instance. * * Returned Value: * A non-negative, maximum frame lengthis returned on success; A negated * errno valueis returned on any failure. * ****************************************************************************/ int sixlowpan_radio_framelen(FAR struct radio_driver_s *radio); /**************************************************************************** * Name: sixlowpan_src_panid * * Description: * Get the source PAN ID from the IEEE802.15.4 radio. * * Input Parameters: * radio - Reference to a radio network driver state instance. * panid - The location in which to return the PAN ID. 0xfff may be * returned if the device is not associated. * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ #ifdef CONFIG_WIRELESS_IEEE802154 int sixlowpan_src_panid(FAR struct radio_driver_s *radio, FAR uint8_t *panid); #endif /**************************************************************************** * Name: sixlowpan_extract_srcaddr * * Description: * Extract the source MAC address from the radio-specific RX metadata, and * return the source address in a radio-agnostic form. * * Input Parameters: * radio - Reference to a radio network driver state instance. * metadata - Opaque reference to the radio-specific RX metadata. * srcaddr - The location in which to return the source MAC address. * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ int sixlowpan_extract_srcaddr(FAR struct radio_driver_s *radio, FAR const void *metadata, FAR struct netdev_varaddr_s *srcaddr); /**************************************************************************** * Name: sixlowpan_extract_destaddr * * Description: * Extract the destination MAC address from the radio-specific RX metadata, * and return the destination address in a radio-agnostic form. * * Input Parameters: * radio - Reference to a radio network driver state instance. * metadata - Opaque reference to the radio-specific RX metadata. * destaddr - The location in which to return the destination MAC address. * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ int sixlowpan_extract_destaddr(FAR struct radio_driver_s *radio, FAR const void *metadata, FAR struct netdev_varaddr_s *destaddr); /**************************************************************************** * Name: sixlowpan_reass_initialize * * Description: * This function initializes the reassembly buffer allocator. This * function must be called early in the initialization sequence before * any radios begin operation. * * Called only once during network initialization. * * Input Parameters: * None * * Returned Value: * None * ****************************************************************************/ void sixlowpan_reass_initialize(void); /**************************************************************************** * Name: sixlowpan_reass_allocate * * Description: * The sixlowpan_reass_allocate function will get a free reassembly buffer * structure for use by 6LoWPAN. * * This function will first attempt to allocate from the g_free_reass * list. If that the list is empty, then the reassembly buffer structure * will be allocated from the dynamic memory pool. * * Input Parameters: * reasstag - The reassembly tag for subsequent lookup. * fragsrc - The source address of the fragment. * * Returned Value: * A reference to the allocated reass structure. All fields used by the * reasembly logic have been zeroed. On a failure to allocate, NULL is * returned. * * Assumptions: * The network is locked. * ****************************************************************************/ FAR struct sixlowpan_reassbuf_s * sixlowpan_reass_allocate(uint16_t reasstag, FAR const struct netdev_varaddr_s *fragsrc); /**************************************************************************** * Name: sixlowpan_reass_find * * Description: * Find a previously allocated, active reassembly buffer with the specified * reassembly tag. * * Input Parameters: * reasstag - The reassembly tag to match. * fragsrc - The source address of the fragment. * * Returned Value: * A reference to the matching reass structure. * * Assumptions: * The network is locked. * ****************************************************************************/ FAR struct sixlowpan_reassbuf_s * sixlowpan_reass_find(uint16_t reasstag, FAR const struct netdev_varaddr_s *fragsrc); /**************************************************************************** * Name: sixlowpan_reass_free * * Description: * The sixlowpan_reass_free function will return a reass structure * to the free list of messages if it was a pre-allocated reass * structure. If the reass structure was allocated dynamically it will * be deallocated. * * Input Parameters: * reass - reass structure to free * * Returned Value: * None * * Assumptions: * The network is locked. * ****************************************************************************/ void sixlowpan_reass_free(FAR struct sixlowpan_reassbuf_s *reass); #endif /* CONFIG_NET_6LOWPAN */ #endif /* __NET_SIXLOWPAN_SIXLOWPAN_INTERNAL_H */