Need to add SIP header to outbound calls on PJSIP trunk

FreePBX Configuration
8

Here is my final solution. I welcome improvements.

Caveats:

  1. The trunk name is Skyetel
  2. NoOp Traces in Dialplan set to 1 in Advanced Settings
  3. All outbounds routes start with known values to match against.
[macro-dialout-trunk-predial-hook]
; Much thanks to Lorne Gaetz with Sangoma for answering questions.
; https://community.freepbx.org/t/need-to-add-sip-header-to-outbound-calls-on-pjsip-trunk/60441/4
exten => s,1,NoOp(Entering user defined context [macro-dialout-trunk-predial-hook] in extensions_custom.conf)
; Get trunk name. If it is Skyetel determine a tenant, if not, exit.
exten => s,n,ExecIF($["${OUT_${DIAL_TRUNK}_SUFFIX}"!=""]?Set(trunk_name=${OUT_${DIAL_TRUNK}_SUFFIX}):Set(trunk_name=${OUT_${DIAL_TRUNK}}))
exten => s,n,GotoIf($["${trunk_name}"=="@Skyetel"]?determine_tenant:exit_macro)
; Based on outbound route name, add a SIP header X-Tenant=X
exten => s,n(determine_tenant),NoOp(We are heading for the Skyetel Trunk, determine the X-Tenant based on outbound route)
; Set x_tenant = to tenant.stl by default.
exten => s,n,Set(x_tenant=tenant.stl)
; Change it if the call is on a Cape, Jeff City, or Quincy outbound route.
exten => s,n,ExecIf($["${OUTBOUND_ROUTE_NAME:0:4}"=="Cape"]?Set(x_tenant=tenant.cape))
exten => s,n,ExecIf($["${OUTBOUND_ROUTE_NAME:0:9}"=="Jeff City"]?Set(x_tenant=tenant.jeffcity))
exten => s,n,ExecIf($["${OUTBOUND_ROUTE_NAME:0:6}"=="Quincy"]?Set(x_tenant=tenant.quincy))
exten => s,n,NoOp(Based on the outbound route name of ${OUTBOUND_ROUTE_NAME}, the X-Tenant is being set to ${x_tenant}.)
exten => s,n,GoSub(func-set-sipheader,s,1(X-Tenant,${x_tenant}))
exten => s,n(exit_macro),MacroExit()
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