[DragonFlyBSD - Bug #3306] Add description support for ifconfig(8)

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Fri Nov 12 17:12:07 PST 2021

Issue #3306 has been updated by dillon.

The ioctl code in the kernel needs to ensure that the buffer is zero-terminated, or it needs to zero-terminate the buffer itself, that it stores in if_description.  Otherwise the strlen() on the read side will overrun the buffer if userland intentionally sets a description that is not zero-terminated.


Bug #3306: Add description support for ifconfig(8)

* Author: tuxillo
* Status: In Progress
* Priority: Normal
* Category: Userland
* Target version: 6.2
* Start date: 2021-11-12

Is there a chance the 'ifconfig NIC description XXX' functionality
will sync with the FreeBSD ? This is a fairly popular option.

# ifconfig vlan1 description vm1-vlan
ifconfig: description: bad value

OpenBSD also has a similar capability[1], as NetBSD as well[2]


fn1. https://man.openbsd.org/ifconfig.8

fn2. https://man.netbsd.org/ifconfig.8

01-if-descr.patch (11.7 KB)

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