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MTP3: parsing of mgmt messages

This commit is contained in:
Harald Welte 2012-01-16 20:03:37 +01:00
parent b668988e25
commit 429456f13f
2 changed files with 19 additions and 5 deletions
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9
include/mtp3.hrl
View File

@ -21,4 +21,13 @@
payload
}).
-record(mtp3mg_msg, {
h0,
h1,
payload
}).
-define(MTP3MG_H0_TEST, 1).
-define(MTP3MG_H1_SLTM, 1).
-define(MTP3MG_H1_SLTA, 2).

15
src/mtp3_codec.erl
View File

@ -48,19 +48,24 @@ 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),
PayloadBin = payload_to_binary(Payload),
PayloadBin = payload_to_binary(ServiceInd, Payload),
<<NetInd:2, 0:2, ServiceInd:4, RoutLblBin/binary, PayloadBin/binary>>.
decode_payload(?MTP3_SERV_MGMT, Payload) ->
decode_payload(?MTP3_SERV_MTN, Payload) ->
<<H0:4, H1:4, _:4, Len:4, TP/binary>> = Payload,
#mtp3mg_msg{h0 = H0, h1 = H1, test_pattern = TP};
#mtp3mg_msg{h0 = H0, h1 = H1, payload = TP};
decode_payload(?MTP3_SERV_MGMT, Payload) ->
<<H0:4, H1:4, Remain/binary>> = Payload,
#mtp3mg_msg{h0 = H0, h1 = H1, payload = Payload};
decode_payload(_, Payload) ->
Payload.
payload_to_binary(#mtp3mg_msg{h0=H0, h1=H1, test_pattern=TP}) ->
payload_to_binary(?MTP3_SERV_MTN, #mtp3mg_msg{h0=H0, h1=H1, payload=TP}) ->
Len = byte_size(TP),
<<H0:4, H1:4, 0:4, Len:4, TP/binary>>;
payload_to_binary(Whatever) ->
payload_to_binary(?MTP3_SERV_MGMT, #mtp3mg_msg{h0=H0, h1=H1, payload=Payload}) ->
<<H0:4, H1:4, Payload/binary>>;
payload_to_binary(_, Whatever) ->
Whatever.