Provide sticky ARP flag for network interface which marks it as the
"sticky" one similarly to what we have for bridges. Once interface is
marked sticky, any address resolved using the ARP will be saved as a
static one in the ARP table. Such functionality may be used to prevent
ARP spoofing or to decrease latencies in Ethernet networks.
The drawbacks include potential limitations in usage of ARP-based
load-balancers and high-availability solutions such as carp(4).
The implemented option is disabled by default, therefore should not
impact the default behaviour of the networking stack.
Sponsored by: Conclusive Engineering sp. z o.o.
Reviewed By: melifaro, pauamma_gundo.com
Differential Revision: https://reviews.freebsd.org/D35314
MFC after: 2 weeks
"ifconfig -g groupname" prints a list of interface names,
which could be confusing, because it differs from
the behavior of "ifconfig -a -g groupname".
While here, add two examples showing the difference between
"ifconfig -a -g groupname" and "ifconfig -g groupname".
Fixes: 0dad3f0e1512 Import interface groups from OpenBSD.
MFC after: 2 weeks
This reference has been present in the manual page since the initial
import of BSD 4.4 Lite sbin Sources. It's time for it to be removed.
MFC after: 2 weeks
- Remove extraneous examples
- Apply "-compact" to the list macros so that it is possible to fit the
definitions of the types and formats in one terminal screen.
MFC after: 2 weeks
This change is about moving the -f documentation into the right place in
the manual. Also, document the IFCONFIG_FORMAT variable in the
ENVIRONMENT section.
MFC after: 2 weeks
In order to clean up the layout of the manual page, let's keep
parameters in the end of the DESCRIPTION section. This patch does not
change any content, it's meant to only move the content around before
refactoring.
MFC after: 2 weeks
- There is no need to mention in the synopsis that -f can be a list of
comma-separated type:format pairs. Let's keep it simple instead.
- Mention that -f can be supplied multiple times.
- Add -f to other entries in the synopsis where it can be used.
MFC after: 2 weeks
As documented, the -C flag can only be used on its own. Any other
command modifiers and flags are ignored when -C is used. Reflect that in
synopsis.
MFC after: 2 weeks
We document capability codes (the CAPS field of "ifconfig wlan0 scan")
in both ifconfig(8) and the handbook. The list is more complete in the
manual page, while the descriptions of individual capabilities are more
detailed in the handbook.
In order to reduce content duplication and bit rot, let's move
handbook's details to the manual page and reference the manual page
whenever necessary.
Reviewed by: debdrup
Reviewed by: Pau Amma
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D34662
When we exposed the PFSYNCF_OK flag to userspace in 5f5bf88949d we
unintentionally caused defer mode to always be enabled.
The ioctl check only looked for nonzero, not for the PFSYNCF_DEFER flag.
Fix this check and ensure ifconfig sets the flag.
Reviewed by: glebius
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D33244
A quick grep through the kernel code shows network drivers compute the
changed bits of network capabilities after a SIOCSIFCAP IOCTL(2) by
using the bitwise exclusive or operation. When the set capabilities
are equal to the already read capabilities, no action will be taken.
Let ifconfig(8) predict this case and skip the SIOCSIFCAP IOCTL(2)
system call.
Discussed with: kib@ (revert change in case of issues)
MFC after: 1 week
Sponsored by: NVIDIA Networking
