network: Do not apply ethernet headers for loopback devices.

This reverts large portions of e2b57695fc3ec43cad099ab3dd93bdd99e052761
and all of 4e9653027d9094f4d57fd294d46ce6eb461b697f, and adjusts
the "tunnel" and "loopback_frame" handlers appropriately.

Initially, this logic was added so that libpcap continued working;
however, it seems that we can change some of the Haiku-specific code
in libpcap and have it continue to operate without requiring such
ethernet headers to be appended.

Fixes #18801.

Change-Id: Ie06908affde894ad1516fbc27e06298309a4e082
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7403
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

net_stack: for local delivery, also capture packets when enabled

the packet capture expects frames: prepend an ethernet header for the capture.

Change-Id: I3d09da2a5a6924a545cc4fbc9dd1577bd3248226
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6452
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

* Reworked the complete stack to allow more than one address per network
interface - this caused quite a number of changes.
* Network interfaces, and its addresses are now reference counted (not yet
complete, though, InterfaceAddresses need to hold references to their
interface as well).
* There are two known regressions of this commit that I will fix later:
- you cannot remove interfaces anymore
- IPv4 multicast was broken anyway, but now it's disabled, too.
* Moved a device_interfaces.cpp|h out of interfaces.cpp.
* The datalink layer chain is now instantiated per domain per interface,
not just per interface anymore.
* When a buffer reaches the network layer, it has no known interface yet, ie.
the ipv4|6|whatever modules need to set this manually.
* Added more debug output, and some new debugger commands, the control option
is now printed in clear text.
* Added hash_address() function to the address modules. Added "const" to
set_to_defaults() where needed.
* Fixed net_buffer's restore header functions offset use as reported by Atis.
* Improved buffer dump output, use the domain module to print the address if
available.
* Moved net_buffer::type into the union, as it's not needed by the upper layers
anymore.
* Moved IPv6 specific code from {add|remove}_default_route() to where it
belongs, but disabled it for the time being.
* Completely discarded useless ipv4_datagram module.
* Added ping6 to the build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37794 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the stack send out interface change notifications where needed (at least
hopefully :-)).
* Improved interface change notification to include the flags that changed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37594 a95241bf-73f2-0310-859d-f6bbb57e9c96

* More or less completed the network notification module - it does not remove
old invalid user listeners yet, though (ie. if a team dies).
* Implemented userland network monitor functions.
* Added a few notifications to the network stack, even though this part isn't
complete yet (especially notify_interface_changed()).
* Added optional debug output to the notifications module.
* Added the module to the image, it basically works now (tested).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28825 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress of a network notification implementation.
* Compiles, but doesn't work at all yet. For those who wonder: the networking
notifications are put into a separate module, so that the network stack can
be unloaded without losing connection, IOW user applications will continue
to retrieve notifications when the stack is loaded again.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28790 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the way the socket functions work:
- The net_stack driver is no longer used. Instead we have a kernel
module which is directly used by syscall implementations in the
kernel. I.e. we no longer tunnel those functions through ioctls, but
have normal syscalls.
- Removed the superfluous net starter module.
- Implemented the FDTYPE_SOCKET type file_descriptors, that is sockets
are no longer vnode based.
- Adjusted libnetwork (the socket function implementations)
accordingly.
- Adjusted netstat accordingly.
* Socket module:
- Implemented socketpair().
- Added "kernel" parameter to the control hook. Quite a few more hooks
would actually need the parameter, but I didn't change those yet,
since that would probably also require changes to the protocol
module interface.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24908 a95241bf-73f2-0310-859d-f6bbb57e9c96

* net_buffer is a module, so it shouldn't have its initializers called
indirectly by the stack - they are now again usable separately as well.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22673 a95241bf-73f2-0310-859d-f6bbb57e9c96

net_buffer is the first user of the new slab allocator, let's see how it goes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20834 a95241bf-73f2-0310-859d-f6bbb57e9c96

introduced a new helper class DatagramSocket which provides a consistent base interface and functionality for the implementation of datagram-based sockets.

- made the ipv4 raw, udp and link protocols use DatagramSocket.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20672 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Completed the previous commit and merger of the team/network/new_stack branch.
* Removed ppp_up and pppcontrol from the image for now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18457 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Reworked the complete stack to allow more than one address per network
interface - this caused quite a number of changes.
* Network interfaces, and its addresses are now reference counted (not yet
complete, though, InterfaceAddresses need to hold references to their
interface as well).
* There are two known regressions of this commit that I will fix later:
- you cannot remove interfaces anymore
- IPv4 multicast was broken anyway, but now it's disabled, too.
* Moved a device_interfaces.cpp|h out of interfaces.cpp.
* The datalink layer chain is now instantiated per domain per interface,
not just per interface anymore.
* When a buffer reaches the network layer, it has no known interface yet, ie.
the ipv4|6|whatever modules need to set this manually.
* Added more debug output, and some new debugger commands, the control option
is now printed in clear text.
* Added hash_address() function to the address modules. Added "const" to
set_to_defaults() where needed.
* Fixed net_buffer's restore header functions offset use as reported by Atis.
* Improved buffer dump output, use the domain module to print the address if
available.
* Moved net_buffer::type into the union, as it's not needed by the upper layers
anymore.
* Moved IPv6 specific code from {add|remove}_default_route() to where it
belongs, but disabled it for the time being.
* Completely discarded useless ipv4_datagram module.
* Added ping6 to the build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37794 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the stack send out interface change notifications where needed (at least
hopefully :-)).
* Improved interface change notification to include the flags that changed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37594 a95241bf-73f2-0310-859d-f6bbb57e9c96

* More or less completed the network notification module - it does not remove
old invalid user listeners yet, though (ie. if a team dies).
* Implemented userland network monitor functions.
* Added a few notifications to the network stack, even though this part isn't
complete yet (especially notify_interface_changed()).
* Added optional debug output to the notifications module.
* Added the module to the image, it basically works now (tested).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28825 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress of a network notification implementation.
* Compiles, but doesn't work at all yet. For those who wonder: the networking
notifications are put into a separate module, so that the network stack can
be unloaded without losing connection, IOW user applications will continue
to retrieve notifications when the stack is loaded again.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28790 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the way the socket functions work:
- The net_stack driver is no longer used. Instead we have a kernel
module which is directly used by syscall implementations in the
kernel. I.e. we no longer tunnel those functions through ioctls, but
have normal syscalls.
- Removed the superfluous net starter module.
- Implemented the FDTYPE_SOCKET type file_descriptors, that is sockets
are no longer vnode based.
- Adjusted libnetwork (the socket function implementations)
accordingly.
- Adjusted netstat accordingly.
* Socket module:
- Implemented socketpair().
- Added "kernel" parameter to the control hook. Quite a few more hooks
would actually need the parameter, but I didn't change those yet,
since that would probably also require changes to the protocol
module interface.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24908 a95241bf-73f2-0310-859d-f6bbb57e9c96

* net_buffer is a module, so it shouldn't have its initializers called
indirectly by the stack - they are now again usable separately as well.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22673 a95241bf-73f2-0310-859d-f6bbb57e9c96

net_buffer is the first user of the new slab allocator, let's see how it goes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20834 a95241bf-73f2-0310-859d-f6bbb57e9c96

introduced a new helper class DatagramSocket which provides a consistent base interface and functionality for the implementation of datagram-based sockets.

- made the ipv4 raw, udp and link protocols use DatagramSocket.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20672 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Completed the previous commit and merger of the team/network/new_stack branch.
* Removed ppp_up and pppcontrol from the image for now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18457 a95241bf-73f2-0310-859d-f6bbb57e9c96