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6loWPAN: Framework to support commpress/uncompress operations.

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This commit is contained in:
Gregory Nutt
2017-03-28 12:23:19 -06:00
parent 25496936cc
commit 75a8ad636c
7 changed files with 383 additions and 2 deletions
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net/sixlowpan/sixlowpan.h
+143
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@@ -45,6 +45,15 @@
#ifdef CONFIG_NET_6LOWPAN
/****************************************************************************
* Public Types
****************************************************************************/
struct rimeaddr_s
{
uint8_t u8[CONFIG_NET_6LOWPAN_RIMEADDR_SIZE];
};
/****************************************************************************
* Public Data
****************************************************************************/
@@ -67,6 +76,8 @@ extern FAR struct sixlowpan_rime_sniffer_s *g_sixlowpan_sniffer;
* Public Function Prototypes
****************************************************************************/
struct net_driver_s; /* Forward reference */
/****************************************************************************
* Name: sixlowpan_initialize
*
@@ -88,6 +99,26 @@ extern FAR struct sixlowpan_rime_sniffer_s *g_sixlowpan_sniffer;
void sixlowpan_initialize(void);
/****************************************************************************
* Name: sixlowpan_output
*
* Description:
* Process an outgoing UDP or TCP packet. Called from UDP/TCP logic to
* determine if the the packet should be formatted for 6loWPAN output.
*
* Input Parameters:
* dev - The IEEE802.15.4 MAC network driver interface.
*
* Returned Value:
* Ok is returned on success; Othewise 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.
*
****************************************************************************/
int sixlowpan_output(FAR struct net_driver_s *dev);
/****************************************************************************
* Name: sixlowpan_hc06_initialize
*
@@ -111,5 +142,117 @@ void sixlowpan_initialize(void);
void sixlowpan_hc06_initialize(void);
#endif
/****************************************************************************
* Name: sixlowpan_hc06_initialize
*
* 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 (draft-ietf-6lowpan-hc, version 6)
* http://tools.ietf.org/html/draft-ietf-6lowpan-hc-06
*
* NOTE: sixlowpan_compresshdr_hc06() does not support ISA100_UDP header
* compression
*
* Input Parameters:
* dev - A reference to the IEE802.15.4 network device state
* destaddr - L2 destination address, needed to compress IP dest
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06
void sixlowpan_compresshdr_hc06(FAR struct net_driver_s *dev,
FAR struct rimeaddr_s *destaddr);
#endif
/****************************************************************************
* Name: sixlowpan_hc06_initialize
*
* 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 packet in the rime buffer, uncompress the header fields,
* and copy the result in the sixlowpan buffer. At the end of the
* decompression, g_rime_hdrlen and g_uncompressed_hdrlen are set to the
* appropriate values
*
* Input Parmeters:
* dev - A reference to the IEE802.15.4 network device state
* 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.
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06
void sixlowpan_uncompresshdr_hc06(FAR struct net_driver_s *dev,
uint16_t iplen);
#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 Parmeters:
* dev - A reference to the IEE802.15.4 network device state
* destaddr - L2 destination address, needed to compress the IP
* destination field
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1
void sixlowpan_compresshdr_hc1(FAR struct net_driver_s *dev,
FAR struct rimeaddr_s *destaddr);
#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 packet in the rime buffer, uncompresses the
* header fields, and copies the result in the sixlowpan buffer. At the
* end of the decompression, g_rime_hdrlen and uncompressed_hdr_len
* are set to the appropriate values
*
* Input Parameters:
* dev - A reference to the IEE802.15.4 network device state
* 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.
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1
void sixlowpan_uncompresshdr_hc1(FAR struct net_driver_s *dev,
uint16_t ip_len);
#endif
#endif /* CONFIG_NET_6LOWPAN */
#endif /* _NET_SIXLOWPAN_SIXLOWPAN_H */