CVS commit: src/sys/net

["Ryota Ozaki" <ozaki-r%netbsd.org@localhost>]

Module Name:    src
Committed By:   ozaki-r
Date:           Fri Nov  9 06:44:31 UTC 2018

Modified Files:
        src/sys/net: if_bridge.c

Log Message:
Fix that brconfig <bridge> (addr) can't show a large number of MAC addresses

The command shows only 256 addresses at maximum even if a bridge caches more
addresses.  It occurs because the kernel doesn't return an error if the command
passes a short buffer that can't store all cached addresses; the kernel fills
cached addresses as much as possible and returns it without telling that the
result is truncated.

Fix the issue by telling a required size of a buffer if a buffer passed from the
command is not enough, which lets the command retry with an enough buffer.

Reported by k-goda@IIJ


To generate a diff of this commit:
cvs rdiff -u -r1.159 -r1.160 src/sys/net/if_bridge.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.