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-rw-r--r--lib/diameter/src/app/diameter_capx.erl145
-rw-r--r--lib/diameter/src/app/diameter_peer_fsm.erl87
2 files changed, 140 insertions, 92 deletions
diff --git a/lib/diameter/src/app/diameter_capx.erl b/lib/diameter/src/app/diameter_capx.erl
index aa5318e79d..138e76411e 100644
--- a/lib/diameter/src/app/diameter_capx.erl
+++ b/lib/diameter/src/app/diameter_capx.erl
@@ -62,6 +62,7 @@
-define(NOSECURITY, ?'DIAMETER_BASE_RESULT-CODE_DIAMETER_NO_COMMON_SECURITY').
-define(NO_INBAND_SECURITY, 0).
+-define(TLS, 1).
%% ===========================================================================
@@ -80,7 +81,7 @@ recv_CER(CER, Svc) ->
try_it([fun rCER/2, CER, Svc]).
-spec recv_CEA(#diameter_base_CEA{}, #diameter_service{})
- -> tried({['Unsigned32'()], #diameter_caps{}}).
+ -> tried({['Unsigned32'()], ['Unsigned32'()], #diameter_caps{}}).
recv_CEA(CEA, Svc) ->
try_it([fun rCEA/2, CEA, Svc]).
@@ -126,10 +127,11 @@ mk_caps(Caps0, Opts) ->
set_cap({Key, _}, _) ->
?THROW({duplicate, Key}).
-cap(K, V) when K == 'Origin-Host';
- K == 'Origin-Realm';
- K == 'Vendor-Id';
- K == 'Product-Name' ->
+cap(K, V)
+ when K == 'Origin-Host';
+ K == 'Origin-Realm';
+ K == 'Vendor-Id';
+ K == 'Product-Name' ->
V;
cap('Host-IP-Address', Vs)
@@ -139,11 +141,8 @@ cap('Host-IP-Address', Vs)
cap('Firmware-Revision', V) ->
[V];
-%% Not documented but accept it as long as it's what we support.
-cap('Inband-Security-Id', [0] = Vs) -> %% NO_INBAND_SECURITY
- Vs;
-
-cap(K, Vs) when K /= 'Inband-Security-Id', is_list(Vs) ->
+cap(_, Vs)
+ when is_list(Vs) ->
Vs;
cap(K, V) ->
@@ -161,28 +160,10 @@ ipaddr(A) ->
%%
%% Build a CER record to send to a remote peer.
-bCER(#diameter_caps{origin_host = Host,
- origin_realm = Realm,
- host_ip_address = Addrs,
- vendor_id = Vid,
- product_name = Name,
- origin_state_id = OSI,
- supported_vendor_id = SVid,
- auth_application_id = AuId,
- acct_application_id = AcId,
- vendor_specific_application_id = VSA,
- firmware_revision = Rev}) ->
- #diameter_base_CER{'Origin-Host' = Host,
- 'Origin-Realm' = Realm,
- 'Host-IP-Address' = Addrs,
- 'Vendor-Id' = Vid,
- 'Product-Name' = Name,
- 'Origin-State-Id' = OSI,
- 'Supported-Vendor-Id' = SVid,
- 'Auth-Application-Id' = AuId,
- 'Acct-Application-Id' = AcId,
- 'Vendor-Specific-Application-Id' = VSA,
- 'Firmware-Revision' = Rev}.
+%% Use the fact that diameter_caps has the same field names as CER.
+bCER(#diameter_caps{} = Rec) ->
+ #diameter_base_CER{}
+ = list_to_tuple([diameter_base_CER | tl(tuple_to_list(Rec))]).
%% rCER/2
%%
@@ -219,19 +200,16 @@ bCER(#diameter_caps{origin_host = Host,
%% That is, each side sends all of its capabilities and is responsible for
%% not sending commands that the peer doesn't support.
-%% TODO: Make it an option to send only common applications in CEA to
-%% allow backwards compatibility, and also because there are likely
-%% servers that expect this. Or maybe a callback.
-
%% 6.10. Inband-Security-Id AVP
%%
%% NO_INBAND_SECURITY 0
%% This peer does not support TLS. This is the default value, if the
%% AVP is omitted.
+%%
+%% TLS 1
+%% This node supports TLS security, as defined by [TLS].
rCER(CER, #diameter_service{capabilities = LCaps} = Svc) ->
- #diameter_base_CER{'Inband-Security-Id' = RIS}
- = CER,
#diameter_base_CEA{}
= CEA
= cea_from_cer(bCER(LCaps)),
@@ -241,56 +219,95 @@ rCER(CER, #diameter_service{capabilities = LCaps} = Svc) ->
{SApps,
RCaps,
- build_CEA([] == SApps,
- RIS,
- lists:member(?NO_INBAND_SECURITY, RIS),
- CEA#diameter_base_CEA{'Result-Code' = ?SUCCESS,
- 'Inband-Security-Id' = []})}.
+ build_CEA(SApps,
+ LCaps,
+ RCaps,
+ CEA#diameter_base_CEA{'Result-Code' = ?SUCCESS})}.
-%% TODO: 5.3 of RFC3588 says we MUST return DIAMETER_NO_COMMON_APPLICATION
+%% TODO: 5.3 of RFC 3588 says we MUST return DIAMETER_NO_COMMON_APPLICATION
%% in the CEA and SHOULD disconnect the transport. However, we have
%% no way to guarantee the send before disconnecting.
-build_CEA(true, _, _, CEA) ->
+build_CEA([], _, _, CEA) ->
CEA#diameter_base_CEA{'Result-Code' = ?NOAPP};
-build_CEA(false, [_|_], false, CEA) ->
- CEA#diameter_base_CEA{'Result-Code' = ?NOSECURITY};
-build_CEA(false, [_|_], true, CEA) ->
- CEA#diameter_base_CEA{'Inband-Security-Id' = [?NO_INBAND_SECURITY]};
-build_CEA(false, [], false, CEA) ->
- CEA.
+
+build_CEA(_, LCaps, RCaps, CEA) ->
+ case common_security(LCaps, RCaps) of
+ [] ->
+ CEA#diameter_base_CEA{'Result-Code' = ?NOSECURITY};
+ [_] = IS ->
+ CEA#diameter_base_CEA{'Inband-Security-Id' = IS}
+ end.
+
+%% common_security/2
+
+common_security(#diameter_caps{inband_security_id = LS},
+ #diameter_caps{inband_security_id = RS}) ->
+ cs(LS, RS).
+
+%% Unspecified is equivalent to NO_INBAND_SECURITY.
+cs([], RS) ->
+ cs([?NO_INBAND_SECURITY], RS);
+cs(LS, []) ->
+ cs(LS, [?NO_INBAND_SECURITY]);
+
+%% Agree on TLS if both parties support it. When sending CEA, this is
+%% to ensure the peer is clear that we will be expecting a TLS
+%% handshake since there is no ssl:maybe_accept that would allow the
+%% peer to choose between TLS or not upon reception of our CEA. When
+%% receiving CEA it deals with a server that isn't explicit about its choice.
+%% TODO: Make the choice configurable.
+cs(LS, RS) ->
+ Is = ordsets:to_list(ordsets:intersection(ordsets:from_list(LS),
+ ordsets:from_list(RS))),
+ case lists:member(?TLS, Is) of
+ true ->
+ [?TLS];
+ false when [] == Is ->
+ Is;
+ false ->
+ [hd(Is)] %% probably NO_INBAND_SECURITY
+ end.
+%% The only two values defined by RFC 3588 are NO_INBAND_SECURITY and
+%% TLS but don't enforce this. In theory this allows some other
+%% security mechanism we don't have to know about, although in
+%% practice something there may be a need for more synchronization
+%% than notification by way of an event subscription offers.
%% cea_from_cer/1
+%% CER is a subset of CEA, the latter adding Result-Code and a few
+%% more AVP's.
cea_from_cer(#diameter_base_CER{} = CER) ->
lists:foldl(fun(F,A) -> to_cea(CER, F, A) end,
#diameter_base_CEA{},
record_info(fields, diameter_base_CER)).
to_cea(CER, Field, CEA) ->
- try ?BASE:'#info-'(diameter_base_CEA, {index, Field}) of
- N ->
- setelement(N, CEA, ?BASE:'#get-'(Field, CER))
+ try ?BASE:'#get-'(Field, CER) of
+ V -> ?BASE:'#set-'({Field, V}, CEA)
catch
- error: _ ->
- CEA
+ error: _ -> CEA
end.
-
+
%% rCEA/2
-rCEA(CEA, #diameter_service{capabilities = LCaps} = Svc)
- when is_record(CEA, diameter_base_CEA) ->
- #diameter_base_CEA{'Result-Code' = RC}
- = CEA,
-
+rCEA(#diameter_base_CEA{'Result-Code' = RC}
+ = CEA,
+ #diameter_service{capabilities = LCaps}
+ = Svc) ->
RC == ?SUCCESS orelse ?THROW({'Result-Code', RC}),
RCaps = capx_to_caps(CEA),
SApps = common_applications(LCaps, RCaps, Svc),
- [] == SApps andalso ?THROW({no_common_apps, LCaps, RCaps}),
+ [] == SApps andalso ?THROW(no_common_applications),
+
+ IS = common_security(LCaps, RCaps),
+
+ [] == IS andalso ?THROW(no_common_security),
- {SApps, RCaps};
+ {SApps, IS, RCaps};
rCEA(CEA, _Svc) ->
?THROW({invalid, CEA}).
diff --git a/lib/diameter/src/app/diameter_peer_fsm.erl b/lib/diameter/src/app/diameter_peer_fsm.erl
index 0252fb3809..282fa2742f 100644
--- a/lib/diameter/src/app/diameter_peer_fsm.erl
+++ b/lib/diameter/src/app/diameter_peer_fsm.erl
@@ -52,6 +52,9 @@
-define(GOAWAY, ?'DIAMETER_BASE_DISCONNECT-CAUSE_DO_NOT_WANT_TO_TALK_TO_YOU').
-define(REBOOT, ?'DIAMETER_BASE_DISCONNECT-CAUSE_REBOOTING').
+-define(NO_INBAND_SECURITY, 0).
+-define(TLS, 1).
+
-define(LOOP_TIMEOUT, 2000).
%% RFC 3588:
@@ -195,10 +198,8 @@ handle_info(T, #state{} = State) ->
?LOG(stop, T),
x(T, State)
catch
- throw: {?MODULE, close = C, Reason} ->
- ?LOG(C, {Reason, T}),
- x(Reason, State);
- throw: {?MODULE, abort, Reason} ->
+ throw: {?MODULE, Tag, Reason} ->
+ ?LOG(Tag, {Reason, T}),
{stop, {shutdown, Reason}, State}
end.
@@ -281,10 +282,9 @@ transition(shutdown, _) -> %% DPR already send: ensure expected timeout
%% Request to close the transport connection.
transition({close = T, Pid}, #state{parent = Pid,
- transport = TPid}
- = S) ->
+ transport = TPid}) ->
diameter_peer:close(TPid),
- close(T,S);
+ {stop, T};
%% DPA reception has timed out.
transition(dpa_timeout, _) ->
@@ -418,11 +418,11 @@ rcv('CER' = N, Pkt, #state{state = recv_CER} = S) ->
%% Anything but CER/CEA in a non-Open state is an error, as is
%% CER/CEA in anything but recv_CER/Wait-CEA.
-rcv(Name, _, #state{state = PS} = S)
+rcv(Name, _, #state{state = PS})
when PS /= 'Open';
Name == 'CER';
Name == 'CEA' ->
- close({Name, PS}, S);
+ {stop, {Name, PS}};
rcv(N, Pkt, S)
when N == 'DWR';
@@ -497,15 +497,20 @@ build_answer('CER',
#diameter_service{capabilities = #diameter_caps{origin_host = OH}}
= Svc,
- {SupportedApps, #diameter_caps{origin_host = DH} = RCaps, CEA}
+ {SupportedApps,
+ #diameter_caps{origin_host = DH} = RCaps,
+ #diameter_base_CEA{'Result-Code' = RC}
+ = CEA}
= recv_CER(CER, S),
try
- [] == SupportedApps
- andalso ?THROW({no_common_application, 5010}),
+ 2001 == RC %% DIAMETER_SUCCESS
+ orelse ?THROW({sent_CEA, RC}),
register_everywhere({?MODULE, connection, OH, DH})
orelse ?THROW({election_lost, 4003}),
- {CEA, [fun open/4, Pkt, SupportedApps, RCaps]}
+ #diameter_base_CEA{'Inband-Security-Id' = [IS]}
+ = CEA,
+ {CEA, [fun open/5, Pkt, SupportedApps, RCaps, {accept, IS}]}
catch
?FAILURE({Reason, RC}) ->
{answer('CER', S) ++ [{'Result-Code', RC}],
@@ -613,7 +618,7 @@ recv_CER(CER, #state{service = Svc}) ->
handle_CEA(#diameter_packet{header = #diameter_header{version = V},
bin = Bin}
= Pkt,
- #state{service = Svc}
+ #state{service = #diameter_service{capabilities = LCaps}}
= S)
when is_binary(Bin) ->
?LOG(recv, 'CEA'),
@@ -626,7 +631,11 @@ handle_CEA(#diameter_packet{header = #diameter_header{version = V},
[] == Errors orelse close({errors, Errors}, S),
- {SApps, #diameter_caps{origin_host = DH} = RCaps} = recv_CEA(CEA, S),
+ {SApps, [IS], #diameter_caps{origin_host = DH} = RCaps}
+ = recv_CEA(CEA, S),
+
+ #diameter_caps{origin_host = OH}
+ = LCaps,
%% Ensure that we don't already have a connection to the peer in
%% question. This isn't the peer election of 3588 except in the
@@ -634,40 +643,62 @@ handle_CEA(#diameter_packet{header = #diameter_header{version = V},
%% receive a CER/CEA, the first that arrives wins the right to a
%% connection with the peer.
- #diameter_service{capabilities = #diameter_caps{origin_host = OH}}
- = Svc,
-
register_everywhere({?MODULE, connection, OH, DH})
- orelse
- close({'CEA', DH}, S),
+ orelse close({'CEA', DH}, S),
- open(DPkt, SApps, RCaps, S).
+ open(DPkt, SApps, RCaps, {connect, IS}, S).
%% recv_CEA/2
recv_CEA(CEA, #state{service = Svc} = S) ->
case diameter_capx:recv_CEA(CEA, Svc) of
- {ok, {[], _}} ->
+ {ok, {_,_}} -> %% return from old code
+ close({'CEA', update}, S);
+ {ok, {[], _, _}} ->
close({'CEA', no_common_application}, S);
- {ok, T} ->
+ {ok, {_, [], _}} ->
+ close({'CEA', no_common_security}, S);
+ {ok, {_,_,_} = T} ->
T;
{error, Reason} ->
close({'CEA', Reason}, S)
end.
-%% open/4
+%% open/5
-open(Pkt, SupportedApps, RCaps, #state{parent = Pid,
- service = Svc}
- = S) ->
- #diameter_service{capabilities = #diameter_caps{origin_host = OH}
+open(Pkt, SupportedApps, RCaps, {Type, IS}, #state{parent = Pid,
+ service = Svc}
+ = S) ->
+ #diameter_service{capabilities = #diameter_caps{origin_host = OH,
+ inband_security_id = LS}
= LCaps}
= Svc,
#diameter_caps{origin_host = DH}
= RCaps,
+
+ tls_ack(lists:member(?TLS, LS), Type, IS, S),
Pid ! {open, self(), {OH,DH}, {capz(LCaps, RCaps), SupportedApps, Pkt}},
+
S#state{state = 'Open'}.
+%% We've advertised TLS support: tell the transport the result
+%% and expect a reply when the handshake is complete.
+tls_ack(true, Type, IS, #state{transport = TPid} = S) ->
+ Ref = make_ref(),
+ MRef = erlang:monitor(process, TPid),
+ TPid ! {diameter, {tls, Ref, Type, IS == ?TLS}},
+ receive
+ {diameter, {tls, Ref}} ->
+ erlang:demonitor(MRef, [flush]);
+ {'DOWN', MRef, process, _, _} = T ->
+ close({tls_ack, T}, S)
+ end;
+
+%% Or not. Don't send anything to the transport so that transports
+%% not supporting TLS work as before without modification.
+tls_ack(false, _, _, _) ->
+ ok.
+
capz(#diameter_caps{} = L, #diameter_caps{} = R) ->
#diameter_caps{}
= list_to_tuple([diameter_caps | lists:zip(tl(tuple_to_list(L)),
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 11:40:16 +0000