osd-contiki/apps
Robert Quattlebaum f145c17039 core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor.
This patch updates the DNS resolver to support IPv6 and introduces an
improved API for looking up DNS entries. This patch also adds optional
support for mDNS lookups and responses to the DNS resolver.

Here is a quick summary of the changes:

 * Added support for IPv6 lookups.
 * DNS queries now honor record expiration.
 * Added support for mDNS, compatible with "Bonjour".
 * Implemented a new lookup api, `resolv_lookup2()`, which provides
   more information about the state of the record(error, expired,
   looking-up, etc.).

About mDNS/Bonjour Support
--------------------------

This patch adds basic support for mDNS/Bonjour, which allows you to
refer to the name of a device instead of its IP address. This is
incredibly convenient for IPv6 addresses because they tend to be very
long and difficult to remember. It is especially important for
link-local IPv6 addresses, since not all programs support the '%'
notation for indicating a network interface (required on systems with
more than one network interface to disambiguate).

In other words, instead of typing in this:

 * `http://[fe80::58dc:d7ed:a644:628f%en1]/`

You can type this instead:

 * `http://contiki.local/`

Huge improvement, no?

The convenience extends beyond that: this mechanism can be used for
nodes to talk to each other based on their human-readable names instead
of their IPv6 addresses. So instead of a switch on
`aaaa::58dc:d7ed:a644:628f` triggering an actuator on
`aaaa::ed26:19c1:4bd2:f95b`, `light-switch.local` can trigger the
actuator on `living-room-lights.local`.

What you need to do to be able to look up `.local` names on your
workstation depends on a few factors:

 * Your machine needs to be able to send and receive multicast packets
   to and from the LoWPAN. You can do this easily with the Jackdaw
   firmware on an RZUSBStick. If you have a border router, you will need
   it to bridge the mDNS multicast packets across the border.

 * If you are using a Mac, you win. All Apple devices support mDNS
   lookups.

 * If you are using Windows, you can install Apple's Bonjour for Windows
   package. (This may be already installed on your machine if you have
   installed iTunes) After you install this you can easily do `.local`
   lookups.

 * If you are using a Unix machine, you can install Avahi.

The default hostname is set to `contiki.local.`. You can change the
hostname programmatically by calling `resolv_set_hostname()`. You can
change the default hostname by changing `CONTIKI_CONF_DEFAULT_HOSTNAME`.

You may disable mDNS support by setting `RESOLV_CONF_SUPPORTS_MDNS` to
`0`.

---------------------------------

core/net/resolv: `resolv_lookup2()` -> `resolv_lookup()`

Note that this patch should fix several `resolv_lookup()` bugs
that already existed. There were many cases where `resolv_lookup()`
was being called and the IP address ignored, but later code
assumed that the IP address had been fetched... ANYWAY, those
should be fixed now.

---------------------------------

examples/udp-ipv6: Updated client to use MDNS to lookup the server.

Also updated the Cooja regression test simulation.
2013-03-10 11:40:08 -07:00
..
about Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
antelope Added some comments about Antelope and Coffee. 2012-11-19 13:21:59 +01:00
calc Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
cmdd Converted u8_t to uint8_t and u16_t to uint16_t in the apps directory. 2012-02-21 08:33:25 -05:00
codeprop Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
collect-view DOS EOL and indentation fixes (core/ apps/ cpu/) 2012-10-30 13:43:51 +00:00
deluge Cleanup of the node-id.h files. The node-id.h file contains 2012-11-20 19:59:46 +01:00
dhcp core/net/uip: Rename uip_ethaddr to uip_lladdr. 2013-03-10 11:39:11 -07:00
directory Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
email core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
er-coap-03 Revised Erbium observing. 2012-02-01 03:24:49 +01:00
er-coap-07 Renamed static functions for clearer memory profiles. 2012-05-13 17:29:21 +02:00
erbium Clean-up and fix for rest-server-example. 2012-03-29 18:56:46 +02:00
ftp core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
httpd-ws core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
irc core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
json * Simple JSON parser and generator. 2012-06-12 16:42:16 +02:00
netconf Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
ping6 Converted u8_t to uint8_t and u16_t to uint16_t in the apps directory. 2012-02-21 08:33:25 -05:00
powertrace Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
process-list Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
program-handler Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
rest-coap Converted u8_t to uint8_t and u16_t to uint16_t in the apps directory. 2012-02-21 08:33:25 -05:00
rest-common Cleanup of the node-id.h files. The node-id.h file contains 2012-11-20 19:59:46 +01:00
rest-http Converted u8_t to uint8_t and u16_t to uint16_t in the apps directory. 2012-02-21 08:33:25 -05:00
serial-shell Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
servreg-hack Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
shell core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
slip-cmd Added check for illegal attributes in packet attribute serialization 2012-04-20 22:40:24 +02:00
telnet core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
telnetd Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
twitter Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
unit-test Do not return test execution status. The information is already available in the test object, and it becomes possible for test function to easily clean up state allocated during the test by putting such code after UNIT_TEST_END. 2011-12-01 14:40:54 +01:00
vnc core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
webbrowser core/net/resolv: IPv6 and mDNS ("Bonjour") support. Major refactor. 2013-03-10 11:40:08 -07:00
webserver Lifted restrictions on accepted MIME type. 2013-02-19 00:25:36 +01:00
webserver-nano Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00