30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
The `ip64` module lets an IPv6 Contiki network be connected to an IPv4
|
|
network without any additional configuration or outside software. The
|
|
`ip64` module runs on the RPL root node and translates outgoing IPv6
|
|
packets into IPv4 packets nd incoming IPv4 packets to IPv6 packets.
|
|
|
|
The `ip64` module uses stateful NAT64 (RFC6164) to do the packet
|
|
translation and DNS64 (RFC6147) to catch DNS requests for IPv6
|
|
addresses, turn them into requests for IPv4 addresses, and turn the
|
|
replies into responses for IPv6 addresses. This allows devices on the
|
|
inside IPv6 network to connect to named servers on the outside IPv4
|
|
network.
|
|
|
|
The `ip64` module hooks into the IPv6 stack via a fallback
|
|
interface. Any packet that can not be routed into the local RPL mesh
|
|
will be sent over the fallback interface, where `ip64` picks it up,
|
|
translates it into an IPv4 packet, and sends it over its outgoing
|
|
interface.
|
|
|
|
In addition to providing NAT64 and DNS64 services, the `ip64` module
|
|
also performs DHCPv4 to request IPv4 address for devices connected to
|
|
a medium such as Ethernet. The `ip64` module also performs ARP
|
|
processing to communicate over the Ethernet.
|
|
|
|
The `ip64` module uses a configuration file called `ip64-conf.h` that
|
|
specifies what device to use for the IPv4 network. This file is
|
|
intended to be placed in the platform directory. An example
|
|
configuration file called `ip64-conf-example.h` is provided in this
|
|
directory.
|
|
|