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-rw-r--r--lib/diameter/doc/src/diameter_app.xml24
-rw-r--r--lib/diameter/src/base/diameter_service.erl49
-rw-r--r--lib/diameter/test/diameter_traffic_SUITE.erl25
3 files changed, 71 insertions, 27 deletions
diff --git a/lib/diameter/doc/src/diameter_app.xml b/lib/diameter/doc/src/diameter_app.xml
index ac056c2d39..b6870f7c28 100644
--- a/lib/diameter/doc/src/diameter_app.xml
+++ b/lib/diameter/doc/src/diameter_app.xml
@@ -382,7 +382,7 @@ communicate transport (or any other) data to the callback.</p>
<p>
A returned <seealso marker="#packet">packet()</seealso> can set
the <c>header</c> field to a
-<c>#diameter_header{}</c> in order to specify values that should
+<c>#diameter_header{}</c> to specify values that should
be preserved in the outgoing request, values otherwise being those in
the header record contained in <c>Packet</c>.
A returned <c>length</c>, <c>cmd_code</c> or <c>application_id</c> is
@@ -537,7 +537,8 @@ not selected.</p>
| {relay, [Opt]}
| discard
| {eval|eval_packet, Action, PostF}</v>
-<v>Reply = {reply, <seealso marker="#message">message()</seealso>}
+<v>Reply = {reply, <seealso marker="#packet">packet()</seealso>
+ | <seealso marker="#message">message()</seealso>}
| {protocol_error, 3000..3999}</v>
<v>Opt = <seealso marker="diameter#call_opt">diameter:call_opt()</seealso></v>
<v>PostF = <seealso marker="diameter#evaluable">diameter:evaluable()</seealso></v>
@@ -568,7 +569,7 @@ The argument <seealso marker="#packet">packet()</seealso> has the following sign
</code>
<p>
-The <c>msg</c> field will be <c>undefined</c> only in case the request has
+The <c>msg</c> field will be <c>undefined</c> in case the request has
been received in the relay application.
Otherwise it contains the record representing the request as outlined
in <seealso
@@ -590,19 +591,26 @@ the relay application.</p>
The <c>transport_data</c> field contains an arbitrary term passed into
diameter from the transport module in question, or the atom
<c>undefined</c> if the transport specified no data.
-The term is preserved in the <seealso marker="#packet">packet()</seealso> containing any answer message
-sent back to the transport process unless another value is explicitly
-specified.</p>
+The term is preserved if a <seealso
+marker="#packet">message()</seealso> is returned but must be set
+explicitly in a returned <seealso marker="#packet">packet()</seealso>.</p>
<p>
The semantics of each of the possible return values are as follows.</p>
<taglist>
-<tag><c>{reply, <seealso marker="#message">message()</seealso>}</c></tag>
+<tag><c>{reply, <seealso marker="#packet">packet()</seealso>
+ | <seealso marker="#message">message()</seealso>}</c></tag>
<item>
<p>
-Send the specified answer message to the peer.</p>
+Send the specified answer message to the peer.
+In the case of a <seealso marker="#packet">packet()</seealso>, the
+message to be sent must be set in the
+<c>msg</c> field and the <c>header</c> field can be set to a
+<c>#diameter_header{}</c> to specify values that should be
+preserved in the outgoing answer, appropriate values otherwise
+being set by diameter.</p>
</item>
<tag><c>{protocol_error, 3000..3999}</c></tag>
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl
index 395d0b77af..29046e6462 100644
--- a/lib/diameter/src/base/diameter_service.erl
+++ b/lib/diameter/src/base/diameter_service.erl
@@ -2177,15 +2177,13 @@ reply([Msg], Dict, TPid, Fs, Pkt)
reply(Msg, Dict, TPid, Fs, Pkt#diameter_packet{errors = []});
%% No errors or a diameter_header/avp list.
-reply(Msg, Dict, TPid, Fs, #diameter_packet{errors = Es,
- transport_data = TD}
- = ReqPkt)
+reply(Msg, Dict, TPid, Fs, #diameter_packet{errors = Es} = ReqPkt)
when [] == Es;
is_record(hd(Msg), diameter_header) ->
Pkt = diameter_codec:encode(Dict, make_answer_packet(Msg, ReqPkt)),
eval_packet(Pkt, Fs),
incr(send, Pkt, Dict, TPid), %% count result codes in sent answers
- send(TPid, Pkt#diameter_packet{transport_data = TD});
+ send(TPid, Pkt);
%% Or not: set Result-Code and Failed-AVP AVP's.
reply(Msg, Dict, TPid, Fs, #diameter_packet{errors = [H|_] = Es} = Pkt) ->
@@ -2200,23 +2198,36 @@ eval_packet(Pkt, Fs) ->
%% make_answer_packet/2
+%% A reply message clears the R and T flags and retains the P flag.
+%% The E flag will be set at encode. 6.2 of 3588 requires the same P
+%% flag on an answer as on the request. A #diameter_packet{} returned
+%% from a handle_request callback can circumvent this by setting its
+%% own header values.
+make_answer_packet(#diameter_packet{header = Hdr,
+ msg = Msg,
+ transport_data = TD},
+ #diameter_packet{header = ReqHdr}) ->
+ Hdr0 = ReqHdr#diameter_header{version = ?DIAMETER_VERSION,
+ is_request = false,
+ is_error = undefined,
+ is_retransmitted = false},
+ #diameter_packet{header = fold_record(Hdr0, Hdr),
+ msg = Msg,
+ transport_data = TD};
+
%% Binaries and header/avp lists are sent as-is.
-make_answer_packet(Bin, _)
+make_answer_packet(Bin, #diameter_packet{transport_data = TD})
when is_binary(Bin) ->
- #diameter_packet{bin = Bin};
-make_answer_packet([#diameter_header{} | _] = Msg, _) ->
- #diameter_packet{msg = Msg};
-
-%% Otherwise a reply message clears the R and T flags and retains the
-%% P flag. The E flag will be set at encode. 6.2 of 3588 requires the
-%% same P flag on an answer as on the request.
-make_answer_packet(Msg, #diameter_packet{header = ReqHdr}) ->
- Hdr = ReqHdr#diameter_header{version = ?DIAMETER_VERSION,
- is_request = false,
- is_error = undefined,
- is_retransmitted = false},
- #diameter_packet{header = Hdr,
- msg = Msg}.
+ #diameter_packet{bin = Bin,
+ transport_data = TD};
+make_answer_packet([#diameter_header{} | _] = Msg,
+ #diameter_packet{transport_data = TD}) ->
+ #diameter_packet{msg = Msg,
+ transport_data = TD};
+
+%% Otherwise, preserve transport_data.
+make_answer_packet(Msg, #diameter_packet{transport_data = TD} = Pkt) ->
+ make_answer_packet(#diameter_packet{msg = Msg, transport_data = TD}, Pkt).
%% rc/1
diff --git a/lib/diameter/test/diameter_traffic_SUITE.erl b/lib/diameter/test/diameter_traffic_SUITE.erl
index 5744ff0307..fa9333a226 100644
--- a/lib/diameter/test/diameter_traffic_SUITE.erl
+++ b/lib/diameter/test/diameter_traffic_SUITE.erl
@@ -38,6 +38,7 @@
result_codes/1,
send_ok/1,
send_nok/1,
+ send_bad_answer/1,
send_arbitrary/1,
send_unknown/1,
send_unknown_mandatory/1,
@@ -208,6 +209,7 @@ end_per_testcase(_, _) ->
tc() ->
[send_ok,
send_nok,
+ send_bad_answer,
send_arbitrary,
send_unknown,
send_unknown_mandatory,
@@ -308,6 +310,14 @@ send_nok(Config) ->
#'diameter_base_answer-message'{'Result-Code' = ?INVALID_AVP_BITS}
= call(Config, Req).
+%% Send an accounting ACR that the server tries to answer with an
+%% inappropriate header, resulting in no answer being sent and the
+%% request timing out.
+send_bad_answer(Config) ->
+ Req = ['ACR', {'Accounting-Record-Type', ?EVENT_RECORD},
+ {'Accounting-Record-Number', 2}],
+ {error, timeout} = call(Config, Req).
+
%% Send an ASR with an arbitrary AVP and expect success and the same
%% AVP in the reply.
send_arbitrary(Config) ->
@@ -770,6 +780,21 @@ request(#diameter_base_accounting_ACR{'Accounting-Record-Number' = 0},
request(#diameter_base_accounting_ACR{'Session-Id' = SId,
'Accounting-Record-Type' = RT,
+ 'Accounting-Record-Number' = 2 = RN},
+ #diameter_caps{origin_host = {OH, _},
+ origin_realm = {OR, _}}) ->
+ Ans = ['ACA', {'Result-Code', ?SUCCESS},
+ {'Session-Id', SId},
+ {'Origin-Host', OH},
+ {'Origin-Realm', OR},
+ {'Accounting-Record-Type', RT},
+ {'Accounting-Record-Number', RN}],
+
+ {reply, #diameter_packet{header = #diameter_header{is_error = true},%% not
+ msg = Ans}};
+
+request(#diameter_base_accounting_ACR{'Session-Id' = SId,
+ 'Accounting-Record-Type' = RT,
'Accounting-Record-Number' = RN},
#diameter_caps{origin_host = {OH, _},
origin_realm = {OR, _}}) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 21:10:30 +0000