137 lines
6.0 KiB
Erlang
137 lines
6.0 KiB
Erlang
% Conversion tools
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% (C) 2023 by sysmocom
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%
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% All Rights Reserved
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%
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% This program is free software; you can redistribute it and/or modify
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% it under the terms of the GNU Affero General Public License as
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% published by the Free Software Foundation; either version 3 of the
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% License, or (at your option) any later version.
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%
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% This program is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU Affero General Public License
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% along with this program. If not, see <http://www.gnu.org/licenses/>.
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%
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% Additional Permission under GNU AGPL version 3 section 7:
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%
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% If you modify this Program, or any covered work, by linking or
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% combining it with runtime libraries of Erlang/OTP as released by
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% Ericsson on http://www.erlang.org (or a modified version of these
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% libraries), containing parts covered by the terms of the Erlang Public
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% License (http://www.erlang.org/EPLICENSE), the licensors of this
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% Program grant you additional permission to convey the resulting work
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% without the need to license the runtime libraries of Erlang/OTP under
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% the GNU Affero General Public License. Corresponding Source for a
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% non-source form of such a combination shall include the source code
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% for the parts of the runtime libraries of Erlang/OTP used as well as
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% that of the covered work.
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%
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-module(conv).
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-author('Pau Espin Pedrol <pespin@sysmocom.de>').
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-include_lib("osmo_gsup/include/gsup_protocol.hrl").
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-include_lib("gtplib/include/gtp_packet.hrl").
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-include_lib("gtp_utils.hrl").
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-include_lib("conv.hrl").
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-export([ip_to_bin/1, bin_to_ip/1]).
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-export([cause_gtp2gsup/1]).
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-export([dia_rc_success/1, dia_rc_to_gsup_cause/1]).
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-export([gtp2_paa_to_epdg_eua/1, epdg_eua_to_gsup_pdp_address/1]).
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-export([nai_to_imsi/1]).
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% ergw_aaa/src/ergw_aaa_3gpp_dict.erl
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% under GPLv2+
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ip_to_bin(IP) when is_binary(IP) ->
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IP;
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ip_to_bin({A, B, C, D}) ->
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<<A, B, C, D>>;
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ip_to_bin({A, B, C, D, E, F, G, H}) ->
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<<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>>.
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bin_to_ip(<<A:8, B:8, C:8, D:8>> = IP) when is_binary(IP) ->
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{A, B, C, D};
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bin_to_ip(<<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>> = IP) when is_binary(IP) ->
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{A, B, C, D, E, F, G, H};
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bin_to_ip({_, _, _, _} = IP) ->
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IP;
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bin_to_ip({_, _, _, _, _, _, _, _} = IP) ->
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IP.
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-spec cause_gtp2gsup(integer()) -> integer().
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cause_gtp2gsup(?GTP2_CAUSE_REQUEST_ACCEPTED) -> 0;
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cause_gtp2gsup(?GTP2_CAUSE_IMSI_IMEI_NOT_KNOWN) -> ?GSUP_CAUSE_IMSI_UNKNOWN;
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cause_gtp2gsup(?GTP2_CAUSE_INVALID_PEER) -> ?GSUP_CAUSE_ILLEGAL_MS;
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cause_gtp2gsup(?GTP2_CAUSE_DENIED_IN_RAT) -> ?GSUP_CAUSE_GPRS_NOTALLOWED;
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cause_gtp2gsup(?GTP2_CAUSE_NETWORK_FAILURE) -> ?GSUP_CAUSE_NET_FAIL;
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cause_gtp2gsup(?GTP2_CAUSE_APN_CONGESTION) -> ?GSUP_CAUSE_CONGESTION;
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cause_gtp2gsup(?GTP2_CAUSE_GTP_C_ENTITY_CONGESTION) -> ?GSUP_CAUSE_CONGESTION;
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cause_gtp2gsup(?GTP2_CAUSE_USER_AUTHENTICATION_FAILED) -> ?GSUP_CAUSE_GSM_AUTH_UNACCEPT;
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cause_gtp2gsup(?GTP2_CAUSE_MANDATORY_IE_INCORRECT) -> ?GSUP_CAUSE_INV_MAND_INFO;
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cause_gtp2gsup(?GTP2_CAUSE_MANDATORY_IE_MISSING) -> ?GSUP_CAUSE_INV_MAND_INFO;
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cause_gtp2gsup(_) -> ?GSUP_CAUSE_PROTO_ERR_UNSPEC.
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-define(DIA_VENDOR_3GPP, 10415).
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% transient (only in Experimental-Result-Code)
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-define(DIAMETER_AUTHENTICATION_DATA_UNAVAILABLE, 4181).
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-define(DIAMETER_ERROR_CAMEL_SUBSCRIPTION_PRESENT, 4182).
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% permanent (only in Experimental-Result-Code)
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-define(DIAMETER_ERROR_USER_UNKNOWN, 5001).
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-define(DIAMETER_AUTHORIZATION_REJECTED, 5003).
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-define(DIAMETER_ERROR_ROAMING_NOT_ALLOWED, 5004).
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-define(DIAMETER_MISSING_AVP, 5005).
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-define(DIAMETER_UNABLE_TO_COMPLY, 5012).
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-define(DIAMETER_ERROR_UNKNOWN_EPS_SUBSCRIPTION, 5420).
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-define(DIAMETER_ERROR_RAT_NOT_ALLOWED, 5421).
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-define(DIAMETER_ERROR_EQUIPMENT_UNKNOWN, 5422).
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-define(DIAMETER_ERROR_UNKOWN_SERVING_NODE, 5423).
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dia_rc_success(#epdg_dia_rc{result_code = 2001}) -> ok;
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dia_rc_success(#epdg_dia_rc{result_code = 2002}) -> ok;
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dia_rc_success(_) -> invalid_result_code.
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-spec dia_rc_to_gsup_cause(#epdg_dia_rc{}) -> non_neg_integer().
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = 2001}) -> 0;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = 2002}) -> 0;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_ERROR_USER_UNKNOWN}) -> ?GSUP_CAUSE_IMSI_UNKNOWN;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_AUTHORIZATION_REJECTED}) -> ?GSUP_CAUSE_LA_NOTALLOWED;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_ERROR_ROAMING_NOT_ALLOWED}) -> ?GSUP_CAUSE_ROAMING_NOTALLOWED;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_ERROR_UNKNOWN_EPS_SUBSCRIPTION}) -> ?GSUP_CAUSE_NO_SUIT_CELL_IN_LA;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_UNABLE_TO_COMPLY}) -> ?GSUP_CAUSE_NET_FAIL;
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dia_rc_to_gsup_cause(#epdg_dia_rc{result_code = ?DIAMETER_MISSING_AVP}) -> ?GSUP_CAUSE_PROTO_ERR_UNSPEC;
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dia_rc_to_gsup_cause(_) -> ?GSUP_CAUSE_NET_FAIL.
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gtp2_paa_to_epdg_eua(#v2_pdn_address_allocation{type = ipv4, address = Addr}) ->
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#epdg_eua{type_nr = ?GTP_PDP_ADDR_TYPE_NR_IPv4,
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ipv4 = Addr};
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gtp2_paa_to_epdg_eua(#v2_pdn_address_allocation{type = ipv6, address = Addr}) ->
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#epdg_eua{type_nr = ?GTP_PDP_ADDR_TYPE_NR_IPv6,
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ipv6 = Addr}.
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%TODO: IPv4v6
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epdg_eua_to_gsup_pdp_address(#epdg_eua{type_nr = ?GTP_PDP_ADDR_TYPE_NR_IPv4, ipv4 = Addr}) ->
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#{pdp_type_org => 1,
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pdp_type_nr => ?GTP_PDP_ADDR_TYPE_NR_IPv4,
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address => #{ ipv4 => Addr}};
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epdg_eua_to_gsup_pdp_address(#epdg_eua{type_nr = ?GTP_PDP_ADDR_TYPE_NR_IPv6, ipv6 = Addr}) ->
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#{pdp_type_org => 1,
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pdp_type_nr => ?GTP_PDP_ADDR_TYPE_NR_IPv6,
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address => #{ ipv6 => Addr}}.
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%TODO: IPv4v6
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% 3GPP TS 23.003 clause 19
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% Input: "<IMSI>@nai.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
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% % TODO: lead number prefix
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nai_to_imsi(NAI) ->
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NAIRev = string:reverse(NAI),
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ImsiRev = string:find(NAIRev, "@", trailing),
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ImsiRev2 = string:trim(ImsiRev, leading, "@"),
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string:reverse(ImsiRev2).
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