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mgw_nat
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mgw_nat: add some more comments to the code

This commit is contained in:
Harald Welte 2012-02-14 09:49:51 +01:00
parent a53a63a8da
commit 432ea566ff
1 changed files with 11 additions and 0 deletions
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11
src/mgw_nat.erl
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@ -283,6 +283,10 @@ mangle_isup_number(from_stp, MsgT, NumType, PartyNum) when MsgT == ?ISUP_MSGT_CO
mangle_isup_number(from_msc, _, _, PartyNum) ->
PartyNum.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% low-level number manipulation routines
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% replace the prefix of PartyNum with NewPfx _if_ the current prefix matches MatchPfx
isup_party_replace_prefix(PartyNum, MatchPfxInt, NewPfxInt) ->
DigitsIn = PartyNum#party_number.phone_number,
@ -300,6 +304,9 @@ isup_party_replace_prefix(PartyNum, MatchPfxInt, NewPfxInt) ->
end,
PartyNum#party_number{phone_number = DigitsOut}.
% ensure the number is in international format. If it is national, add
% CountryCodeInt and switch type to international. If it's already
% national, just leave it at that.
isup_party_internationalize(PartyNum, CountryCodeInt) ->
#party_number{phone_number = DigitsIn, nature_of_addr_ind = Nature} = PartyNum,
CountryCode = osmo_util:int2digit_list(CountryCodeInt),
@ -335,6 +342,10 @@ isup_party_nat00_internationalize(PartyNum) ->
end,
PartyNum#party_number{phone_number = DigitsOut, nature_of_addr_ind = NatureOut}.
% ensure that the resulting number is in national format. If the input
% is national, there is no change. If the input is international, _and_
% the country code equals CountryCodeInt, strip the CC and convert to
% national.
isup_party_nationalize(PartyNum, CountryCodeInt) ->
#party_number{phone_number = DigitsIn, nature_of_addr_ind = Nature} = PartyNum,
CountryCode = osmo_util:int2digit_list(CountryCodeInt),