[asterisk-dev] asterisk-1.6.0-beta7.1 chan_sip.c authuser not found when not using deprecated username

[Dennis DeDonatis]

After many hours of debugging, I found out that in build_reply_digest (in chan_sip.c) on line 
14065, if I don't have username=whatever but only have defaultuser=whatever, the check on line 
14069 will show that username has a length of zero.

Please add a warning message of some sort before the return -1.  That would have saved me a 
LOT of time trying to figure out what was going on.

The registration was successful, but I would get the notice:

chan_sip.c: Failed to authenticate on INVITE...

whenever I attempted to make a call.  That was the only message I had to go on.

My main post is to please add a message if chan_sip.c can't find a username for 
build_reply_digest, so feel free to ignore my next question, but it does directly apply.

Is there something else I should be doing in my sip.conf?

[callcentric]
type=friend
context=incoming
host=callcentric.com
username=1777xxx
;defaultuser=1777xxx
secret=xxx
fromdomain=callcentric.com
insecure=port,invite
dtmfmode=rfc2833
canreinvite=no
disallow=all
allow=ulaw
;allow=g729
qualify=yes
fromuser=1777xxx
nat=route

Please let me know if you need more information to duplicate this or if you want me to try 
anything.

Thanks for all of your help.

Dennis