net/sixlowpan: Record and restore d_buf on entry/exit of sixlowpan_input. This avoids an issue where d_buf gets set to NULL by sixlowpan, and then is used by forwarding logic from another network interface before getting set back to the drivers internal b
Approved-by: GregoryN <gnutt@nuttx.org>
sixlowpan: Fixes logic surrounding the Universal/Local bit. This bit represents whether the IID is locally/globally administered. The U/L bit is bit 1 of the MSB of the EUI-64. It should only be inverted in cases where there is a full EUI-64. In cases whe
* sixlowpan: Fixes logic surrounding the Universal/Local bit. This bit represents whether the IID is locally/globally administered. The U/L bit is bit 1 of the MSB of the EUI-64. It should only be inverted in cases where there is a full EUI-64. In cases where the IID is derived from say, a short address, this bit should be forced to 0, indicating that it is locally administered.
See:
https://tools.ietf.org/html/rfc4291#section-2.5.1https://tools.ietf.org/html/rfc4944#section-6https://tools.ietf.org/html/rfc2464#section-4
* sixlowpan: Account for endianness with U/L bit.
Approved-by: GregoryN <gnutt@nuttx.org>
net/sixlowpan: Fixes decompression of ipaddr from MAC address. The logic used to populate the IP from the radio address should match sixlowpan_ipfromsaddr/sixlowpan_ipfromeaddr
Approved-by: GregoryN <gnutt@nuttx.org>
The MLD implementation did not follow the RFC correctly when it is the Querier. The Querier should use a general query and get query messages from all members of all groups. This would be driven by a single timer per sub-nset since all groups are queried at once. Instead, the design used a Multicast Address Specific Query with one timer per group and ignores groups that we are not members of.
Similary, the MLDv1 compatibility timer should be a single, separate timer, not a per-group timer.
net/mld: Group may be NULL when sending a general query
net/icmpv6/icmpv6_input.c: Correct caculation of the ICMPv6 header address
net/mld/mld_query.c: Correct back test for group found.
net/mld/mld_report.c: Fix host vs. network order problem.
net/mld/mld_send.c: Correct the address used in sending the General Query. It should be the unspecified address in that case.
net/mld: Querying workaround. The MLD implementation does not follow the RFC correct when it is the Querier. The Querier should use a general query and get query messages from all members of all groups. This would be driven by a single timer since all groups are queried at once. Instead, the design currently uses a Multicast Address Specific Query with one timer per group and ignores groups that we are not members of.
Normally it is required that the network be in the "down" state when re-configuring the network interface. This is thought not to be a necessary here because.
1. The ICMPv6 logic here runs with the network locked so there can be no outgoing packets with bad source IP addresses from any asynchronous network activity using the device being reconfigured.
2. Incoming packets depend only upon the MAC filtering. Network drivers do not use the IP address; they filter incoming packets using only the MAC address which is not being changed here.
Gregory Nutt
Anthony Merlino
Xiang Xiao