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6loWPAN: Use information in struct ieee802154_data_ind_s when reassembling a packet

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This commit is contained in:
Gregory Nutt
2017-05-05 11:36:16 -06:00
parent 1854902185
commit 0eb7ec046e
4 changed files with 78 additions and 17 deletions
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net/sixlowpan/sixlowpan_input.c
+67 -9
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@@ -61,6 +61,7 @@
#include "nuttx/net/netdev.h"
#include "nuttx/net/ip.h"
#include "nuttx/net/sixlowpan.h"
#include "nuttx/wireless/ieee802154/ieee802154_mac.h"
#ifdef CONFIG_NET_PKT
# include "pkt/pkt.h"
@@ -129,6 +130,55 @@ static uint8_t g_bitbucket[UNCOMP_MAXHDR];
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: sixlowpan_compare_fragsrc
*
* Description:
* Check if the fragment that we just received is from the same source as
* the previosly received fragements.
*
* Input Parameters:
* ieee - IEEE 802.15.4 MAC driver state reference
* ind - Characteristics of the newly received frame
*
* Returned Value:
* true if the sources are the same.
*
****************************************************************************/
static bool sixlowpan_compare_fragsrc(FAR struct ieee802154_driver_s *ieee,
FAR const struct ieee802154_data_ind_s *ind)
{
/* Check for an extended source address */
if (ind->src.mode == IEEE802154_ADDRMODE_EXTENDED)
{
/* Was the first source address also extended? */
if (ieee->i_fragsrc.extended)
{
/* Yes.. perform the extended address comparison */
return sixlowpan_eaddrcmp(ieee->i_fragsrc.u.eaddr.u8, ind->src.eaddr);
}
}
else
{
/* Short source address. Was the first source address also short? */
if (!ieee->i_fragsrc.extended)
{
/* Yes.. perform the extended short comparison */
return sixlowpan_saddrcmp(ieee->i_fragsrc.u.saddr.u8, &ind->src.saddr);
}
}
/* Address are different size and, hence, cannot match */
return false;
}
/****************************************************************************
* Name: sixlowpan_compress_ipv6hdr
*
@@ -235,6 +285,7 @@ static void sixlowpan_uncompress_ipv6hdr(FAR uint8_t *fptr, FAR uint8_t *bptr)
*
* Input Parameters:
* ieee - The IEEE802.15.4 MAC network driver interface.
* ind - Meta data characterizing the received frame.
* iob - The IOB containing the frame.
*
* Returned Value:
@@ -246,6 +297,7 @@ static void sixlowpan_uncompress_ipv6hdr(FAR uint8_t *fptr, FAR uint8_t *bptr)
****************************************************************************/
static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
FAR const struct ieee802154_data_ind_s *ind,
FAR struct iob_s *iob)
{
FAR uint8_t *fptr; /* Convenience pointer to beginning of the frame */
@@ -401,8 +453,8 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
/* Verify that this fragment is part of that reassembly sequence */
else if (fragsize != ieee->i_pktlen || ieee->i_reasstag != fragtag /* ||
!sixlowpan_addrcmp(&ieee->i_fragsrc, &ind->???) */)
else if (fragsize != ieee->i_pktlen || ieee->i_reasstag != fragtag ||
!sixlowpan_compare_fragsrc(ieee, ind))
{
/* The packet is a fragment that does not belong to the packet
* being reassembled or the packet is not a fragment.
@@ -459,10 +511,16 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
* address.
*/
#warning Missing logic
#if 0
sixlowpan_addrcopy(&ieee->i_fragsrc, ind->???]);
#endif
if (ind->src.mode == IEEE802154_ADDRMODE_EXTENDED)
{
ieee->i_fragsrc.extended = true;
sixlowpan_eaddrcopy(ieee->i_fragsrc.u.eaddr.u8, ind->src.eaddr);
}
else
{
memset(&ieee->i_fragsrc, 0, sizeof(struct sixlowpan_tagaddr_s));
sixlowpan_saddrcopy(ieee->i_fragsrc.u.saddr.u8, &ind->src.saddr);
}
}
#endif /* CONFIG_NET_6LOWPAN_FRAG */
@@ -698,7 +756,7 @@ static int sixlowpan_dispatch(FAR struct ieee802154_driver_s *ieee)
* framelist - The head of an incoming list of frames. Normally this
* would be a single frame. A list may be provided if
* appropriate, however.
* ind - Meta data characterizing the received packet. If there are
* ind - Meta data characterizing the received frame. If there are
* multilple frames in the list, this meta data must apply to
* all of the frames!
*
@@ -709,7 +767,7 @@ static int sixlowpan_dispatch(FAR struct ieee802154_driver_s *ieee)
int sixlowpan_input(FAR struct ieee802154_driver_s *ieee,
FAR struct iob_s *framelist,
FAR const struct eee802154_data_ind_s *ind)
FAR const struct ieee802154_data_ind_s *ind)
{
int ret = -EINVAL;
@@ -730,7 +788,7 @@ int sixlowpan_input(FAR struct ieee802154_driver_s *ieee,
/* Process the frame, decompressing it into the packet buffer */
ret = sixlowpan_frame_process(ieee, iob);
ret = sixlowpan_frame_process(ieee, ind, iob);
/* Free the IOB the held the consumed frame */