megaco_binary_name_resolver_v1.erl

OTP是开放电信平台的简称

    decode_item({Scope, Item}, [A, B], SubItem).

decode_item(Scope, [A, B], Item) ->
    ?d("decode_item -> entry",[]),
    case A of
        16#00 -> 
            case B of
                16#01 -> decode_g(Scope, Item);
                16#02 -> decode_root(Scope, Item);
                16#03 -> decode_tonegen(Scope, Item);
                16#04 -> decode_tonedet(Scope, Item);
                16#05 -> decode_dg(Scope, Item);
                16#06 -> decode_dd(Scope, Item);
                16#07 -> decode_cg(Scope, Item);
                16#08 -> decode_cd(Scope, Item);
                16#09 -> decode_al(Scope, Item);
                16#0a -> decode_ct(Scope, Item);
                16#0b -> decode_nt(Scope, Item);
                16#0c -> decode_rtp(Scope, Item);
                16#0d -> decode_tdmc(Scope, Item);
                16#00 -> decode_native(Scope, Item)
            end;
        16#fe ->
            case B of
                %% Proprietary extension
                16#fe -> decode_swb(Scope, Item)
            end;
        16#ff ->
            case B of
                16#ff when Item == [16#ff, 16#ff] -> "*"
            end
    end.

decode_package(Package) ->
    ?d("decode_package -> entry with"
       "~n   Package: ~p", [Package]),
    [A, B] = Package,
    case A of
        16#00 -> 
            case B of
                16#01 -> "g";
                16#02 -> "root";
                16#03 -> "tonegen";
                16#04 -> "tonedet";
                16#05 -> "dg";
                16#06 -> "dd";
                16#07 -> "cg";
                16#08 -> "cd";
                16#09 -> "al";
                16#0a -> "ct";
                16#0b -> "nt";
                16#0c -> "rtp";
                16#0d -> "tdmc";
                16#00 -> ""
            end;
        16#fe ->
            case B of
                16#fe ->  "swb"
            end;
        16#ff ->
            case B of
                16#ff -> "*"
            end
    end.

decode_profile([A, B]) ->
    case A of
        16#00 -> 
            case B of
                16#fe -> "resgw";
		_     -> "profile" ++ [A + $0, B + $0]
            end;
	_ ->
	    "profile" ++ [A + $0, B + $0]
    end.

decode_dialplan([A, B]) ->
    "dialplan" ++ [A + $0, B + $0].

decode_mid(Mid) ->
    case Mid of
	{domainName, DN} ->
	    Lower = to_lower(DN#'DomainName'.name),	    
	    {domainName, DN#'DomainName'{name = Lower}};
	{deviceName, PathName} ->
	    Lower = to_lower(PathName),
	    {deviceName, Lower};
	Other ->
	    Other
    end.

to_lower(Chars) ->
    [?LOWER(Char) || Char <- Chars].

%%----------------------------------------------------------------------
%% Encode package name from internal form
%% Scope  ::= property | event | signal | statistics
%%----------------------------------------------------------------------

encode(mid, Package) ->
    encode_mid(Package);
encode(package, Package) ->
    encode_package(Package);
encode(profile, Profile) ->
    encode_profile(Profile);
encode(dialplan, Dialplan) ->
    encode_dialplan(Dialplan);
encode(Scope, PackageItem) when atom(Scope) ->
    ?d("encode(~p) -> entry with"
       "~n   PackageItem: ~p", [Scope, PackageItem]),
    case string:tokens(PackageItem, [$/]) of
	[Package, Item] ->
	    ?d("encode -> "
	       "~n   Package: ~p"
	       "~n   Item:    ~p", [Package, Item]),
	    encode_package(Package) ++ encode_item(Scope, Package, Item);
	[Item] ->
	    ?d("encode -> Item: ~p", [Item]),
	    [16#00, 16#00 | encode_native(Scope, Item)]
    end;
encode({Scope, PackageItem}, SubItem) when atom(Scope) ->
    ?d("encode(~p) -> entry with"
       "~n   PackageItem: ~p"
       "~n   SubItem:     ~p", [Scope, PackageItem, SubItem]),
    case string:tokens(PackageItem, [$/]) of
	[Package, Item] ->
	    ?d("encode -> "
	       "~n   Package: ~p"
	       "~n   Item:    ~p", [Package, Item]),
	    encode_item({Scope, Item}, Package, SubItem);
	[_Item] ->
	    ?d("encode -> _Item: ~p", [_Item]),
	    encode_native(Scope, SubItem)
    end.

encode_item(_Scope, _Package, "*") ->
    [16#ff, 16#ff];
encode_item(Scope, Package, Item) ->
    ?d("encode_item(~s) -> entry", [Package]),
    case Package of
        "g"       -> encode_g(Scope, Item);
        "root"    -> encode_root(Scope, Item);
        "tonegen" -> encode_tonegen(Scope, Item);
        "tonedet" -> encode_tonedet(Scope, Item);
        "dg"      -> encode_dg(Scope, Item);
        "dd"      -> encode_dd(Scope, Item);
        "cg"      -> encode_cg(Scope, Item);
        "cd"      -> encode_cd(Scope, Item);
        "al"      -> encode_al(Scope, Item);
        "ct"      -> encode_ct(Scope, Item);
        "nt"      -> encode_nt(Scope, Item);
        "rtp"     -> encode_rtp(Scope, Item);
        "tdmc"    -> encode_tdmc(Scope, Item);
        "swb"     -> encode_swb(Scope, Item)
    end.

encode_package(Package) ->
    case Package of
        "g"       -> [16#00, 16#01];
        "root"    -> [16#00, 16#02];
        "tonegen" -> [16#00, 16#03];
        "tonedet" -> [16#00, 16#04];
        "dg"      -> [16#00, 16#05];
        "dd"      -> [16#00, 16#06];
        "cg"      -> [16#00, 16#07];
        "cd"      -> [16#00, 16#08];
        "al"      -> [16#00, 16#09];
        "ct"      -> [16#00, 16#0a];
        "nt"      -> [16#00, 16#0b];
        "rtp"     -> [16#00, 16#0c];
        "tdmc"    -> [16#00, 16#0d];
        ""        -> [16#00, 16#00];
	"*"       -> [16#ff, 16#ff];
        "swb"     -> [16#fe, 16#fe]
    end.

encode_profile(Profile) ->
    case Profile of
        "resgw" ->
	    [16#00, 16#fe];
	[$p, $r, $o, $f, $i, $l, $e | Name] ->
	    case Name of
		[A, B] -> [A - $0, B - $0];
		[B]    -> [0, B - $0];
		[]     -> [0, 0]
	    end
    end.

encode_dialplan(Dialplan) ->
    case Dialplan of
	[$d, $i, $a, $l, $p, $l, $a, $n | Name] ->
	    case Name of
		[A, B] -> [A - $0, B - $0];
		[B]    -> [0, B - $0];
		[]     -> [0, 0]
	    end
    end.

encode_mid(Mid) ->
    Mid.


%%----------------------------------------------------------------------
%% Name:    g - Generic
%% Version: 1
%% Extends: None
%% Purpose: Generic package for commonly encountered items
%%----------------------------------------------------------------------

capabilities_g() ->
    [
     {event, "cause"},
     {event, "sc"}
    ].

encode_g(event, Item) ->
    case Item of
	"cause"  -> [16#00, 16#01];
	"sc"     -> [16#00, 16#02]
    end;

encode_g({event_parameter, Item}, SubItem) ->
    case Item of
	"cause"  -> 
	    case SubItem of
		"Generalcause" -> [16#00, 16#01];
		"Failurecause" -> [16#00, 16#02]
	    end;
	"sc" ->
	    case SubItem of
		"SigID" -> [16#00, 16#01];
		"Meth"  -> [16#00, 16#02];
		"SLID"  -> [16#00, 16#03]
	    end
    end.

decode_g(event, Item) ->
    case Item of
	[16#00, 16#01] -> "cause";
	[16#00, 16#02] -> "sc"
    end;

decode_g({event_parameter, Item}, SubItem) ->
    case Item of
        [16#00, 16#01] -> % Event: cause
            case SubItem of
                [16#00, 16#01] -> "Generalcause";
		[16#00, 16#02] -> "Failurecause"
            end;

        [16#00, 16#02] -> % Event: sc
            case SubItem of
                [16#00, 16#01] -> "SigID";
                [16#00, 16#02] -> "Meth";
		[16#00, 16#03] -> "SLID"
            end
    end.


%%----------------------------------------------------------------------
%% Name:    root - Base Root Package
%% Version: 1
%% Extends: None
%% Purpose: This package defines Gateway wide properties.
%%----------------------------------------------------------------------

capabilities_root() ->
    [
     {property, "maxNumberOfContexts"},
     {property, "maxTerminationsPerContext"},
     {property, "normalMGExecutionTime"},
     {property, "normalMGCExecutionTime"},
     {property, "MGProvisionalResponseTimerValue"},
     {property, "MGCProvisionalResponseTimerValue"}
    ].

encode_root(Scope, Item) ->
    case Scope of
        property ->
            case Item of
                "maxNumberOfContexts"              -> [16#00, 16#01];
                "maxTerminationsPerContext"        -> [16#00, 16#02];
                "normalMGExecutionTime"            -> [16#00, 16#03];
                "normalMGCExecutionTime"           -> [16#00, 16#04];
                "MGProvisionalResponseTimerValue"  -> [16#00, 16#05];
                "MGCProvisionalResponseTimerValue" -> [16#00, 16#06]
            end
    end.

decode_root(Scope, Item) ->
    case Scope of
        property ->
            case Item of
                [16#00, 16#01] -> "maxNumberOfContexts";
                [16#00, 16#02] -> "maxTerminationsPerContext";
                [16#00, 16#03] -> "normalMGExecutionTime";
                [16#00, 16#04] -> "normalMGCExecutionTime";
                [16#00, 16#05] -> "MGProvisionalResponseTimerValue";
		[16#00, 16#06] -> "MGCProvisionalResponseTimerValue"
            end
    end.


%%----------------------------------------------------------------------
%% Name:    tonegen - Tone Generator Package
%% Version: 1
%% Extends: None
%% Purpose: This package defines signals to generate audio tones.
%%          This package does not specify parameter values. It is
%%          intended to be extendable. Generally, tones are defined
%%          as an individual signal with a parameter, ind,
%%          representing "interdigit" time delay, and a tone id to
%%          be used with playtones.  A tone id should be kept
%%          consistent with any tone generation for the same tone.
%%          MGs are expected to be provisioned with the characteristics
%%          of appropriate tones for the country in which the MG is located.
%%----------------------------------------------------------------------

capabilities_tonegen() ->
    [
     {signal, "pt"}
    ].

encode_tonegen(signal, Item) ->
    case Item of
	"pt" -> [16#00, 16#01]
    end;

encode_tonegen({signal_parameter, Item}, SubItem) ->
    case Item of
        "pt" ->
            case SubItem of
                "tl"  -> [16#00, 16#01];
                "ind" -> [16#00, 16#02]
            end
    end.

decode_tonegen(signal, Item) ->
    case Item of
	[16#00, 16#01] -> "pt"
    end;

decode_tonegen({signal_parameter, Item}, SubItem) ->
    case Item of
        [16#00, 16#01] -> % Event: pt
            case SubItem of
                [16#00, 16#01] -> "tl";
                [16#00, 16#02] -> "ind"
            end
    end.


%%----------------------------------------------------------------------
%% Name:    tonedet - Tone Detection Package
%% Version: 1
%% Extends: None
%% Purpose: This Package defines events for audio tone detection.
%%          Tones are selected by name (tone id). MGs are expected
%%          to be provisioned with the characteristics of appropriate
%%          tones for the country in which the MG is located.
%%          
%%          This package does not specify parameter values.
%%          It is intended to be extendable.
%%----------------------------------------------------------------------

capabilities_tonedet() ->
    [
     {event, "std"},
     {event, "etd"},
     {event, "ltd"}
    ].

encode_tonedet(event, Item) ->
    case Item of
	"std" -> [16#00, 16#01];
	"etd" -> [16#00, 16#02];
	"ltd" -> [16#00, 16#03]
    end;

encode_tonedet({event_parameter, Item}, SubItem) ->
    case Item of
        "std" ->
            case SubItem of
                "tl"  -> [16#00, 16#01];
                "tid" -> [16#00, 16#03]
            end;
        "etd" ->
            case SubItem of
                "tl"  -> [16#00, 16#01];
                "tid" -> [16#00, 16#03];
                "dur" -> [16#00, 16#02]
            end;
        "ltd" ->
            case SubItem of
                "tl"  -> [16#00, 16#01];
                "dur" -> [16#00, 16#02];
                "tid" -> [16#00, 16#03]
            end
    end.

decode_tonedet(event, Item) ->
    case Item of
	[16#00, 16#01] -> "std";