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PktRadion/6LoWPAN: Fix more issues related to single byte radio addressing.

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This commit is contained in:
Gregory Nutt 2017-07-31 11:41:09 -06:00
parent e4f3e32d7b
commit 678b63c887
2 changed files with 23 additions and 23 deletions
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2
configs/sim/pktradio/defconfig
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@ -21,6 +21,8 @@ CONFIG_BUILTIN=y
CONFIG_DEBUG_SYMBOLS=y
CONFIG_DISABLE_POLL=y
CONFIG_DRIVERS_WIRELESS=y
CONFIG_EXAMPLES_NETTEST_DAEMON_STACKSIZE=4096
CONFIG_EXAMPLES_NETTEST_LOOPBACK=y
CONFIG_EXAMPLES_NETTEST_SERVER_PORTNO=61616
CONFIG_EXAMPLES_NETTEST_SERVERIPv6ADDR_1=0xfe80
CONFIG_EXAMPLES_NETTEST_SERVERIPv6ADDR_6=0x00ff

44
net/sixlowpan/sixlowpan_hc06.c
View File

@ -392,6 +392,9 @@ static void uncompress_addr(FAR const struct netdev_varaddr_s *addr,
bool usemac = (prefpost & 0x0100) != 0;
uint8_t prefcount = (prefpost >> 4) & 0xf;
uint8_t postcount = prefpost & 0x0f;
int destndx;
int endndx;
int i;
/* The value 16 is encoded as 0xf in the 4 bit-fields. */
@ -443,7 +446,7 @@ static void uncompress_addr(FAR const struct netdev_varaddr_s *addr,
if (postcount > 0)
{
if (postcount == 2 && prefcount < 11)
if (postcount <= 2 && prefcount < 11)
{
/* 16 bits uncompression ipaddr=0000:00ff:fe00:XXXX */
@ -451,37 +454,32 @@ static void uncompress_addr(FAR const struct netdev_varaddr_s *addr,
ipaddr[6] = HTONS(0xfe00);
}
/* Handle the even bytes in the address */
/* If the postcount is even then take extra care with endian-ness */
if ((postcount & 1) == 0)
destndx = 8 - (postcount >> 1);
endndx = 8 - (postcount & 1);
for (i = destndx; i < endndx; i++)
{
int destndx = 8 - (postcount >> 1);
int i;
/* Big-endian, network order */
for (i = destndx; i < 8; i++)
{
/* Big-endian, network order */
ipaddr[i] = (uint16_t)srcptr[0] << 8 | (uint16_t)srcptr[1];
srcptr += 2;
}
/* If the was a standard MAC based address then toggle */
if (fullmac)
{
ipaddr[destndx] ^= 0x0200;
}
ipaddr[i] = (uint16_t)srcptr[0] << 8 | (uint16_t)srcptr[1];
srcptr += 2;
}
/* postcount is odd... REVISIT: I am not sure about bye ordering. */
/* Handle any remaining odd byte */
else
if ((postcount & 1) != 0)
{
FAR uint8_t *destptr = (FAR uint8_t *)&ipaddr[0];
int offset = 16 - postcount;
ipaddr[7] = (uint16_t)(*srcptr) << 8;
}
memcpy(&destptr[offset], srcptr, postcount);
/* If the was a standard MAC based address then toggle */
if (fullmac)
{
ipaddr[7] ^= 0x0200;
}
/* If we took the data from packet, then update the packet pointer */