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libbsd.txt: Move network interface driver hints

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Sebastian Huber 2022-05-23 11:25:08 +02:00
parent e56945817f
commit a3172c7f26
2 changed files with 14 additions and 11 deletions
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14
CONTRIBUTING.rst
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@ -416,3 +416,17 @@ within interrupt context is not allowed, so the Board Support Package (BSP)
should support the should support the
`Interrupt Manager <https://docs.rtems.org/branches/master/c-user/interrupt/directives.html#rtems-interrupt-server-handler-install>`_ `Interrupt Manager <https://docs.rtems.org/branches/master/c-user/interrupt/directives.html#rtems-interrupt-server-handler-install>`_
in general. in general.
Network Interface Drivers Hints
===============================
Link Up/Down Events
-------------------
You can notifiy the application space of link up/down events in your network
interface driver via the
``if_link_state_change(LINK_STATE_UP/LINK_STATE_DOWN)`` function. The
DHCPCD(8) client is a consumer of these events for example. Make sure that the
interface flag ``IFF_UP`` and the interface driver flag ``IFF_DRV_RUNNING`` is
set in case the link is up, otherwise ``ether_output()`` will return the error
status ``ENETDOWN``.

11
libbsd.txt
View File

@ -7,17 +7,6 @@ RTEMS BSD Library Guide
== Getting Started == Getting Started
== Network Interface Drivers
=== Link Up/Down Events
You can notifiy the application space of link up/down events in your network
interface driver via the if_link_state_change(LINK_STATE_UP/LINK_STATE_DOWN)
function. The DHCPCD(8) client is a consumer of these events for example.
Make sure that the interface flag IFF_UP and the interface driver flag
IFF_DRV_RUNNING is set in case the link is up, otherwise ether_output() will
return the error status ENETDOWN.
== Qemu == Qemu
Use the following script to set up a virtual network with three tap devices Use the following script to set up a virtual network with three tap devices