Rework initial auto joining and add big TODOs.

* If we have a configured network, then we always try to connect to it
as soon as the interface has been brought up.
* If we don't have a configured network and are auto configuring, we
use the AutoconfigLooper to also do initial auto joins.
* Before issuing auto joins we need to wait for scan results to come
in, so we watch for corresponding messages.

For now auto joining is a one shot attempt as the infrastructure to
properly tell reasons for scans apart is not yet there.

Store the active flag if there is an initial link.

This ensures that we don't spuriously re-detect a link if we have a
race between starting to watch for link state changes and detecting the
initial link.

Don't try to auto-configure network interfaces with no link.

We already start watching for link state changes, so as soon as a link
is established the configuration will be triggered.

Fix slight oversight in previous commit.

Only trigger autoconfiguration if the link status changed from down
to up.

Keep more accurate track of media status changes.

AutoConfigLooper now remembers the last media state it received from the device,
and compares both to see if the active state actually changed. Should help with
quality changes where the link didn't actually drop. May also help on ethernet
if the chipset sends spurious link status change notifications.

NetServer: Add IPv6 link local address to each nic on boot

* Remove old ioctl code, cleanup AutoLooper.
* Move link local code into NetServer
AutoLooper should only be used for things that
count as "auto-configuration" such as DHCP, router
advertisements, and DHCPv6
* Properly form IPv6 link local address from MAC address
* I think some IPv6 routes are needed still for proper
local link connectivity.
* Duplicate Address Detection is still a TODO
* Style cleanup

Patch by Atis Elsts from GSoC 2010 that was overlooked.
- Adds IPv6 fragmentation support and some partial work to enable configuration of IPv6 in net_server. Not currently in the build.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41291 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented INIT-REBOOT DHCP state: as required per DHCP specs,
we now request the last address we got from DHCP server, and only on failure
we fallback on the whole INIT state (discover, collect offer, etc).
This should fix people losing their IP address at each renewal, or far worse,
after the link goes up again.
Closed #7346.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41285 a95241bf-73f2-0310-859d-f6bbb57e9c96

Revert files that were commit by mistake in previous commit. Sorry.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41279 a95241bf-73f2-0310-859d-f6bbb57e9c96

Avoid deadlock.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41278 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Now uses the new network API instead of directly using socket ioctls.
This makes the code much cleaner and simpler.
* Completely untested, though (will do that next).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39595 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix the build.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29236 a95241bf-73f2-0310-859d-f6bbb57e9c96

* The auto-config looper now correctly sets the IFF_CONFIGURING flag - it
cannot be set in the AF_LINK level.
* It now also checks for this flag, so that the fallback configuration won't
overwrite a manually configured interface anymore.
* When an interface is configured, the IFF_CONFIGURING flag is now cleared as
it should.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29230 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Pulled an AutoconfigClient class out of DHCPClient - all clients are supposed
to inherit from that one (there is still just a single client, though, this
just simplifies having a generic mechanism to register and use auto-config
clients).
* AutoconfigLooper now listens to link changes, and will reconfigure the
interface if a new link is there - this even seems to work in emulation, will
test on real hardware next.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28827 a95241bf-73f2-0310-859d-f6bbb57e9c96

- Changed default address for failed DHCP requests from 192.168.0.x to
169.254.0.x, as this is the IANA reserved address for default
configuration.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24415 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved the network status replicant into its own application, similar to what
ProcessController and PowerStatus are doing.
* Currently polls for info only - later, the stack should support listeners for
interface related changes.
* Also works under BONE (although it doesn't make much sense to use it there).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20655 a95241bf-73f2-0310-859d-f6bbb57e9c96

net_server: initial replicant version.

* Still picture-less and thus ugly.
* It provides updated information on what the net_server is doing in terms of interface configuration.
* It is also able to show simplistic address information for configured interfaces.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20523 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented lease time renewal.
* The DHCPClient is now added to its looper before doing the negotiation, so that
it's BMessenger is already valid.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19478 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress of DHCP - the interface should now be correctly configured.
* Lease times are currently ignored, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19462 a95241bf-73f2-0310-859d-f6bbb57e9c96

The beginnings of automatic configuration of network devices using DHCP; this is
currently only triggered when there is no configuration file - it can't be configured
this way yet.
All DHCP currently does is to send a UDP broadcast DHCP discover message. More to come.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19437 a95241bf-73f2-0310-859d-f6bbb57e9c96

Rework initial auto joining and add big TODOs.

* If we have a configured network, then we always try to connect to it
as soon as the interface has been brought up.
* If we don't have a configured network and are auto configuring, we
use the AutoconfigLooper to also do initial auto joins.
* Before issuing auto joins we need to wait for scan results to come
in, so we watch for corresponding messages.

For now auto joining is a one shot attempt as the infrastructure to
properly tell reasons for scans apart is not yet there.

Store the active flag if there is an initial link.

This ensures that we don't spuriously re-detect a link if we have a
race between starting to watch for link state changes and detecting the
initial link.

Don't try to auto-configure network interfaces with no link.

We already start watching for link state changes, so as soon as a link
is established the configuration will be triggered.

Fix slight oversight in previous commit.

Only trigger autoconfiguration if the link status changed from down
to up.

Keep more accurate track of media status changes.

AutoConfigLooper now remembers the last media state it received from the device,
and compares both to see if the active state actually changed. Should help with
quality changes where the link didn't actually drop. May also help on ethernet
if the chipset sends spurious link status change notifications.

NetServer: Add IPv6 link local address to each nic on boot

* Remove old ioctl code, cleanup AutoLooper.
* Move link local code into NetServer
AutoLooper should only be used for things that
count as "auto-configuration" such as DHCP, router
advertisements, and DHCPv6
* Properly form IPv6 link local address from MAC address
* I think some IPv6 routes are needed still for proper
local link connectivity.
* Duplicate Address Detection is still a TODO
* Style cleanup

Patch by Atis Elsts from GSoC 2010 that was overlooked.
- Adds IPv6 fragmentation support and some partial work to enable configuration of IPv6 in net_server. Not currently in the build.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41291 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented INIT-REBOOT DHCP state: as required per DHCP specs,
we now request the last address we got from DHCP server, and only on failure
we fallback on the whole INIT state (discover, collect offer, etc).
This should fix people losing their IP address at each renewal, or far worse,
after the link goes up again.
Closed #7346.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41285 a95241bf-73f2-0310-859d-f6bbb57e9c96

Revert files that were commit by mistake in previous commit. Sorry.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41279 a95241bf-73f2-0310-859d-f6bbb57e9c96

Avoid deadlock.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41278 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Now uses the new network API instead of directly using socket ioctls.
This makes the code much cleaner and simpler.
* Completely untested, though (will do that next).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39595 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix the build.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29236 a95241bf-73f2-0310-859d-f6bbb57e9c96

* The auto-config looper now correctly sets the IFF_CONFIGURING flag - it
cannot be set in the AF_LINK level.
* It now also checks for this flag, so that the fallback configuration won't
overwrite a manually configured interface anymore.
* When an interface is configured, the IFF_CONFIGURING flag is now cleared as
it should.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29230 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Pulled an AutoconfigClient class out of DHCPClient - all clients are supposed
to inherit from that one (there is still just a single client, though, this
just simplifies having a generic mechanism to register and use auto-config
clients).
* AutoconfigLooper now listens to link changes, and will reconfigure the
interface if a new link is there - this even seems to work in emulation, will
test on real hardware next.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28827 a95241bf-73f2-0310-859d-f6bbb57e9c96

- Changed default address for failed DHCP requests from 192.168.0.x to
169.254.0.x, as this is the IANA reserved address for default
configuration.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24415 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved the network status replicant into its own application, similar to what
ProcessController and PowerStatus are doing.
* Currently polls for info only - later, the stack should support listeners for
interface related changes.
* Also works under BONE (although it doesn't make much sense to use it there).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20655 a95241bf-73f2-0310-859d-f6bbb57e9c96

net_server: initial replicant version.

* Still picture-less and thus ugly.
* It provides updated information on what the net_server is doing in terms of interface configuration.
* It is also able to show simplistic address information for configured interfaces.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20523 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented lease time renewal.
* The DHCPClient is now added to its looper before doing the negotiation, so that
it's BMessenger is already valid.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19478 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress of DHCP - the interface should now be correctly configured.
* Lease times are currently ignored, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19462 a95241bf-73f2-0310-859d-f6bbb57e9c96

The beginnings of automatic configuration of network devices using DHCP; this is
currently only triggered when there is no configuration file - it can't be configured
this way yet.
All DHCP currently does is to send a UDP broadcast DHCP discover message. More to come.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19437 a95241bf-73f2-0310-859d-f6bbb57e9c96