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net/sixlowpan: The logic that extracts interface identifier from the IP address needs to be generalized to handle cases where the address is not a link local address.

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This commit is contained in:
Anthony Merlino 2017-11-20 14:36:21 -06:00 • committed by Gregory Nutt
parent 003a37e37f
commit 35a54d7a1e
1 changed files with 7 additions and 6 deletions
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13
net/sixlowpan/sixlowpan_utils.c
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@ -250,14 +250,15 @@ int sixlowpan_destaddrfromip(FAR struct radio_driver_s *radio,
return OK;
}
/* Otherwise, the destination MAC address is encoded in the IP address */
/* Otherwise, the destination MAC address is encoded in the IP address */
/* Check for compressible link-local address.
* REVISIT: This should not restrict us to link-local addresses.
*/
/* If the address is link-local, or matches the prefix of the local address,
* the interface identifier can be extracted from the lower bits of the address.
*/
if (ipaddr[0] != HTONS(0xfe80) || ipaddr[1] != 0 ||
ipaddr[2] != 0 || ipaddr[3] != 0)
if (!sixlowpan_islinklocal(ipaddr) &&
!net_ipv6addr_maskcmp(radio->r_dev.d_ipv6addr, ipaddr,
radio->r_dev.d_ipv6netmask))
{
return -EADDRNOTAVAIL;
}