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mtp3: add encoder/decoder for MTP3MG

This commit is contained in:
Harald Welte 2012-01-16 15:59:27 +01:00
parent d9c318fdca
commit 642a68b017
1 changed files with 17 additions and 2 deletions
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19
src/mtp3_codec.erl
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@ -34,8 +34,9 @@ parse_mtp3_routing_label(_, LabelBin) when is_binary(LabelBin) ->
parse_mtp3_msg(DataBin) when is_binary(DataBin) ->
<<NetInd:2, 0:2, ServiceInd:4, Remain/binary>> = DataBin,
{ok, RoutLbl, Payload} = parse_mtp3_routing_label(ServiceInd, Remain),
PayloadDec = decode_payload(ServiceInd, Payload),
#mtp3_msg{network_ind = NetInd, service_ind = ServiceInd, routing_label = RoutLbl,
payload = Payload}.
payload = PayloadDec}.
encode_mtp3_routing_label(#mtp3_routing_label{sig_link_sel = Sls, origin_pc = OpcIn,
@ -47,5 +48,19 @@ encode_mtp3_routing_label(#mtp3_routing_label{sig_link_sel = Sls, origin_pc = Op
encode_mtp3_msg(#mtp3_msg{network_ind = NetInd, service_ind = ServiceInd,
routing_label = RoutLbl, payload = Payload}) ->
RoutLblBin = encode_mtp3_routing_label(RoutLbl),
<<NetInd:2, 0:2, ServiceInd:4, RoutLblBin/binary, Payload/binary>>.
PayloadBin = payload_to_binary(Payload),
<<NetInd:2, 0:2, ServiceInd:4, RoutLblBin/binary, PayloadBin/binary>>.
decode_payload(?MTP3_SERV_MGMT, Payload) ->
<<H0:4, H1:4, _:4, Len:4, TP/binary>> = Payload,
#mtp3mg_msg{h0 = H0, h1 = H1, test_pattern = TP};
decode_payload(_, Payload) ->
Payload.
payload_to_binary(#mtp3mg_msg{h0=H0, h1=H1, test_pattern=TP}) ->
Len = byte_size(TP),
<<H0:4, H1:4, 0:4, Len:4, TP/binary>>;
payload_to_binary(Whatever) ->
Whatever.