diff options
Diffstat (limited to 'lib/hipe/test/bs_SUITE_data/bs_extract.erl')
| -rw-r--r-- | lib/hipe/test/bs_SUITE_data/bs_extract.erl | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/lib/hipe/test/bs_SUITE_data/bs_extract.erl b/lib/hipe/test/bs_SUITE_data/bs_extract.erl new file mode 100644 index 0000000000..0492689fa8 --- /dev/null +++ b/lib/hipe/test/bs_SUITE_data/bs_extract.erl @@ -0,0 +1,94 @@ +%% -*- erlang-indent-level: 2 -*- +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% +%% Among testing other things, this module shows why performing LCM on +%% SPARC is currently problematic. SPARC does not mark untagged values +%% as dead when they are live over function calls which in turn causes +%% them to be traced by the garbage collector leading to crashes. +%% +%% A simple way to get this behaviour is to compile just the function +%% +%% {bsextract,tid_internal_storage,2} +%% +%% with the compiler option "rtl_lcm" on and without. +%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +-module(bs_extract). + +-export([test/0]). + +-include("bs_decode_extract.hrl"). + +-define(PDU, <<30,16,0,90,0,1,0,0,255,255,255,255,81,67,101,7,0,0,0,96, + 6,12,146,18,14,0,15,252,16,0,0,17,0,0,128,0,2,241,33,131, + 0,20,7,97,112,110,48,49,51,97,8,101,114,105,99,115,115, + 111,110,2,115,101,132,0,20,128,192,35,16,1,5,0,16,5,117, + 115,101,114,53,5,112,97,115,115,53,133,0,4,172,28,12,1, + 133,0,4,172,28,12,3,134,0,8,145,148,113,129,0,0,0,0>>). + +-define(RES, {ok, {mvsgT_imsi, <<81,67,101,7,0,0,0,240>>}}). + +test() -> + ?RES = extract_v0_opt(1000, ?PDU), + ok. + +extract_v0_opt(0, Pdu) -> + get_external_id(Pdu); +extract_v0_opt(N, Pdu) -> + {ok,_} = get_external_id(Pdu), + extract_v0_opt(N-1, Pdu). + +get_external_id(<<0:3,_:4,0:1,1:8,_Length:16,SequenceNumber:16, + _FlowLabel:16,_SNDCP_N_PDU_Number:8,_:3/binary-unit:8, + _TID:8/binary-unit:8,_InformationElements/binary>>) -> + {echo,#sesT_echoReqV0{},SequenceNumber}; +%% Create PDP Context Request +%% GTP97, SNN=0 +%% (No SNDCP N-PDU number) +get_external_id(<<0:3,_:4,0:1,16:8,_Length:16,_SequenceNumber:16, + _FlowLabel:16,_SNDCP_N_PDU_Number:8,_:3/binary-unit:8, + TID:8/binary-unit:8,_InformationElements/binary>>) -> + {ok,_IMSI} = extract_imsi(TID); +%%% Update PDP Context Request +%%% GTP97, SNN=0 +%%% (No SNDCP N-PDU number) +get_external_id(<<0:3,_:4,0:1,18:8,_Length:16,_SequenceNumber:16, + _FlowLabel:16,_SNDCP_N_PDU_Number:8,_:3/binary-unit:8, + TID:8/binary-unit:8,_InformationElements/binary>>) -> + {ok,_IMSI} = extract_imsi(TID); +%%% Delete PDP Context Request +%%% GTP97, SNN=0 +%%% (No SNDCP N-PDU number) +get_external_id(<<0:3,_:4,0:1,20:8,_Length:16,_SequenceNumber:16, + _FlowLabel:16,_SNDCP_N_PDU_Number:8,_:3/binary-unit:8, + TID:8/binary-unit:8,_InformationElements/binary>>) -> + {ok,_IMSI} = extract_imsi(TID); +%%% Error handling: GTP Message Too Short +%%% Error handling: Unknown GTP Signalling message. +%%% Error handling: Unexpected GTP Signalling message. +get_external_id(_GTP_Message) -> + fault. + +%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +%% extract_imsi/1 +%% Get the IMSI element from TID +extract_imsi(TID) -> + {ok,#mvsgT_tid{imsi=IMSI}} = tid_internal_storage(TID,[]), + {ok,IMSI}. + +%%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +%%% tid_internal_storage/3 +%%% Convert TID binary to internal datatype +tid_internal_storage(Bin,_) -> + Size = byte_size(Bin) - 1, + <<Front:Size/binary,NSAPI:4,DigitN:4>> = Bin, + Result = + case DigitN of + 2#1111 -> + #mvsgT_tid{imsi = #mvsgT_imsi{value=Front}, nsapi = NSAPI}; + _ -> + Value = <<Front/binary,2#1111:4,DigitN:4>>, + #mvsgT_tid{imsi = #mvsgT_imsi{value = Value}, nsapi = NSAPI} + end, + {ok,Result}. |