[asterisk-users] Trying to forward calls by using the Callee's context as the forward dial context

[John French]

I'm simply trying to forward calls to users who have the call forwarding 
feature enabled (FWD Status and FWD Ph Number kept in the astDB).  The 
problem is that I want users to be able to forward calls to numbers that 
they would normally be allowed to dial within their own context. (I 
don't want a local call only person forwarding to a long dist number, 
for example.)  I'm able to get the channel context for SIP devices but 
not for IAX or Zap Devices.  I need some pointers on getting IAXPEER to 
work and how to handle getting the ZAP context info.  If there's an 
easier way, I'm all ears.  Thanks.

; #####################Set Some Variables####################
exten => s,1,Set(DEVICE=${ARG1}) ;i.e. SIP/johns_phone
exten => s,n,Set(Protocol=${CUT(DEVICE,/,1)}) ;Parse out SIP
exten => s,n,Set(Phone=${CUT(DEVICE,/,2)})  ;Parse out johns_phone

;Stuff omitted for some amout of brevity....

; #####################Make Forward Calls######################
; We only want people to be able to forward to numbers they could 
normally call
; We'll have to somehow get their dialing contexts from the channel conf 
files.
exten => s,n(Forward),NoOp()

exten => s,n,GotoIf($["${Protocol}" = "SIP"]?SIPDev)
exten => s,n,GotoIf($["${Protocol}" = "IAX2"]?IAXDev)
exten => s,n,Goto(ZapDev)

;ok, they are an IAX device so use IAXPEER
exten => 
s,n(IAXDev),Set(CalledUsersContext=${IAXPEER(${Phone}:context)})
exten => s,n,Goto(dial_time)

;ok, they are an SIP device so use SIPPEER
exten => 
s,n(SIPDev),Set(CalledUsersContext=${SIPPEER(${Phone}:context)})
exten => s,n,Goto(dial_time)

;ok, they are an Zap device so use... Uhhhhh.
exten => s,n(ZapDev),NoOp( I have no clue how to get the zap channel's 
context...)

exten => s,n(dial_time),NoOp(======================> Chan Type 
${Protocol})
exten => s,n,NoOp(======================> Chan Name ${Phone})
exten => s,n,NoOp(======================> Channel User's context 
${CalledUsersContext})
exten => s,n,Dial(Local/${FWDNumber}@${CalledUsersContext}/n)


Results at console on verbosity 9:
SIPPEER() Works as advertised when I dial a SIP phone which has been 
call forwarded
    -- Executing NoOp("Zap/1-1", "======================> Chan Type 
SIP") in new stack
    -- Executing NoOp("Zap/1-1", "======================> Chan Name 
jf_linksys") in new stack
    -- Executing NoOp("Zap/1-1", "======================> Channel Users 
context longdistance_users") in new stack
    -- Executing Dial("Zap/1-1", "Local/5551212 at longdistance_users/n") 
in new stack

IAXPEER() Seems to be broken or I don't know how to use it properly.
    -- Executing NoOp("SIP/jf_linksys-08f20548", 
"======================> Chan Type IAX2") in new stack
    -- Executing NoOp("SIP/jf_linksys-08f20548", 
"======================> Chan Name johns_pc") in new stack
    -- Executing NoOp("SIP/jf_linksys-08f20548", 
"======================> Channel Users context ") in new stack
    -- Executing Dial("SIP/jf_linksys-08f20548", "Local/5551212@/n") in 
new stack