>Number:         6171
>Category:       bin
>Synopsis:       xntpd -b fails with multiple ip addresses
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people (Utility Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 17 11:35:00 1998
>Last-Modified:
>Originator:     Andreas E. Wrede
>Organization:
Planix, Inc.,  Networking, System Administration, Consulting
>Release:        <NetBSD-current source date> -current Aug 28/98
>Environment:
	
System: NetBSD woffi 1.3G NetBSD 1.3G (WOFFI) #0: Sun Aug 30 19:30:35 EDT 1998 root@woffi:/local4/src/sys/arch/i386/compile/WOFFI i386


>Description:
	
On system that have interfaces with multiple ip address in the same subnet, 
running xntpd with either the -b option or 'broadcastclient' in the ntp.conf 
file will fail with the message:
bind() fd 12, family 2, port 123, addr cc1da13f, in_classd=0 flags=0 fails: Address already in use

Looking at the debug output from xntpd -b -d -d -d, it appears that xntpd 
also gets the broadcast address and the subnet mask wrong if an interface 
has multiple ip addresses in different (sub)networks.

>How-To-Repeat:
Ifconfig an interface with two addresses in the same subnet. 
Start xntpd -b -A
Observer error message in syslog.

>Fix:
Unknown. The workaround is to define the ntp server explicitly in ntp.conf.
>Audit-Trail:
>Unformatted:
running xntpd as a broadcastclient fails if an interface has multiple IP addresses.