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-rw-r--r--lib/diameter/src/base/diameter_traffic.erl130
1 files changed, 80 insertions, 50 deletions
diff --git a/lib/diameter/src/base/diameter_traffic.erl b/lib/diameter/src/base/diameter_traffic.erl
index f2ac745053..5fac61f416 100644
--- a/lib/diameter/src/base/diameter_traffic.erl
+++ b/lib/diameter/src/base/diameter_traffic.erl
@@ -32,7 +32,8 @@
-export([receive_message/4]).
%% towards diameter_peer_fsm and diameter_watchdog
--export([incr_error/3,
+-export([incr/4,
+ incr_error/4,
incr_rc/4]).
%% towards diameter_service
@@ -48,6 +49,8 @@
-include_lib("diameter/include/diameter.hrl").
-include("diameter_internal.hrl").
+-define(LOGX(Reason, T), begin ?LOG(Reason, T), x({Reason, T}) end).
+
-define(RELAY, ?DIAMETER_DICT_RELAY).
-define(BASE, ?DIAMETER_DICT_COMMON). %% Note: the RFC 3588 dictionary
@@ -113,38 +116,52 @@ peer_down(TPid) ->
failover(TPid).
%% ---------------------------------------------------------------------------
-%% incr_error/3
+%% incr/4
%% ---------------------------------------------------------------------------
-%% A decoded message with errors.
-incr_error(Dir, #diameter_packet{header = H, errors = [_|_]}, TPid) ->
- incr_error(Dir, H, TPid);
+incr(Dir, #diameter_packet{header = H}, TPid, Dict) ->
+ incr(Dir, H, TPid, Dict);
-%% An encoded message with errors and an identifiable header ...
-incr_error(Dir, {_, _, #diameter_header{} = H}, TPid) ->
- incr_error(Dir, H, TPid);
+incr(Dir, #diameter_header{} = H, TPid, Dict) ->
+ incr(TPid, {msg_id(H, Dict), Dir}).
-%% ... or not.
-incr_error(Dir, {_,_}, TPid) ->
- incr(TPid, {unknown, Dir, error});
+%% ---------------------------------------------------------------------------
+%% incr_error/4
+%% ---------------------------------------------------------------------------
-incr_error(Dir, #diameter_header{} = H, TPid) ->
- incr_error(Dir, diameter_codec:msg_id(H), TPid);
+%% Decoded message without errors.
+incr_error(recv, #diameter_packet{errors = []}, _, _) ->
+ ok;
-incr_error(Dir, {_,_,_} = Id, TPid) ->
- incr(TPid, {Id, Dir, error});
+incr_error(recv = D, #diameter_packet{header = H}, TPid, Dict) ->
+ incr_error(D, H, TPid, Dict);
-incr_error(_, _, _) ->
- false.
+%% Encoded message with errors and an identifiable header ...
+incr_error(send = D, {_, _, #diameter_header{} = H}, TPid, Dict) ->
+ incr_error(D, H, TPid, Dict);
+
+%% ... or not.
+incr_error(send = D, {_,_}, TPid, _) ->
+ incr_error(D, unknown, TPid);
+incr_error(Dir, #diameter_header{} = H, TPid, Dict) ->
+ incr_error(Dir, msg_id(H, Dict), TPid);
+
+incr_error(Dir, Id, TPid, _) ->
+ incr_error(Dir, Id, TPid).
+
+incr_error(Dir, Id, TPid) ->
+ incr(TPid, {Id, Dir, error}).
+
%% ---------------------------------------------------------------------------
%% incr_rc/4
%% ---------------------------------------------------------------------------
--spec incr_rc(send|recv, #diameter_packet{}, TPid, Dict0)
+-spec incr_rc(send|recv, Pkt, TPid, Dict0)
-> {Counter, non_neg_integer()}
| Reason
- when TPid :: pid(),
+ when Pkt :: #diameter_packet{},
+ TPid :: pid(),
Dict0 :: module(),
Counter :: {'Result-Code', integer()}
| {'Experimental-Result', integer(), integer()},
@@ -154,9 +171,8 @@ incr_rc(Dir, Pkt, TPid, Dict0) ->
try
incr_rc(Dir, Pkt, Dict0, TPid, Dict0)
catch
- exit: {invalid_error_bit = E, _} ->
- E;
- exit: no_result_code = E ->
+ exit: {E,_} when E == no_result_code;
+ E == invalid_error_bit ->
E
end.
@@ -234,7 +250,7 @@ spawn_request(TPid, Pkt, Dict0, Opts, RecvData) ->
spawn_opt(fun() -> recv_request(TPid, Pkt, Dict0, RecvData) end, Opts)
catch
error: system_limit = E -> %% discard
- ?LOG({error, E}, now())
+ ?LOG(error, E)
end.
%% ---------------------------------------------------------------------------
@@ -263,8 +279,9 @@ recv_R({#diameter_app{id = Id, dictionary = Dict} = App, Caps},
Pkt0,
Dict0,
RecvData) ->
+ incr(recv, Pkt0, TPid, Dict),
Pkt = errors(Id, diameter_codec:decode(Id, Dict, Pkt0)),
- incr_error(recv, Pkt, TPid),
+ incr_error(recv, Pkt, TPid, Dict),
{Caps, Pkt, App, recv_R(App, TPid, Dict0, Caps, RecvData, Pkt)};
%% Note that the decode is different depending on whether or not Id is
%% ?APP_ID_RELAY.
@@ -336,23 +353,25 @@ rc(N) ->
%% This error is returned when a request is received with an invalid
%% message length.
-errors(_, #diameter_packet{header = #diameter_header{length = Len},
+errors(_, #diameter_packet{header = #diameter_header{length = Len} = H,
bin = Bin,
errors = Es}
= Pkt)
when Len < 20;
0 /= Len rem 4;
8*Len /= bit_size(Bin) ->
+ ?LOG(invalid_message_length, {H, bit_size(Bin)}),
Pkt#diameter_packet{errors = [5015 | Es]};
%% DIAMETER_UNSUPPORTED_VERSION 5011
%% This error is returned when a request was received, whose version
%% number is unsupported.
-errors(_, #diameter_packet{header = #diameter_header{version = V},
+errors(_, #diameter_packet{header = #diameter_header{version = V} = H,
errors = Es}
= Pkt)
when V /= ?DIAMETER_VERSION ->
+ ?LOG(unsupported_version, H),
Pkt#diameter_packet{errors = [5011 | Es]};
%% DIAMETER_COMMAND_UNSUPPORTED 3001
@@ -360,12 +379,13 @@ errors(_, #diameter_packet{header = #diameter_header{version = V},
%% recognize or support. This MUST be used when a Diameter node
%% receives an experimental command that it does not understand.
-errors(Id, #diameter_packet{header = #diameter_header{is_proxiable = P},
+errors(Id, #diameter_packet{header = #diameter_header{is_proxiable = P} = H,
msg = M,
errors = Es}
= Pkt)
when ?APP_ID_RELAY /= Id, undefined == M; %% don't know the command
?APP_ID_RELAY == Id, not P -> %% command isn't proxiable
+ ?LOG(command_unsupported, H),
Pkt#diameter_packet{errors = [3001 | Es]};
%% DIAMETER_INVALID_HDR_BITS 3008
@@ -374,9 +394,11 @@ errors(Id, #diameter_packet{header = #diameter_header{is_proxiable = P},
%% inconsistent with the command code's definition.
errors(_, #diameter_packet{header = #diameter_header{is_request = true,
- is_error = true},
+ is_error = true}
+ = H,
errors = Es}
= Pkt) ->
+ ?LOG(invalid_hdr_bits, H),
Pkt#diameter_packet{errors = [3008 | Es]};
%% Green.
@@ -532,7 +554,6 @@ answer_message(RC,
origin_realm = {OR,_}},
Dict0,
Pkt) ->
- ?LOG({error, RC}, Pkt),
{Dict0, answer_message(OH, OR, RC, Dict0, Pkt)}.
%% resend/7
@@ -651,6 +672,7 @@ reply(Msg, Dict, TPid, Dict0, Fs, ReqPkt) ->
TPid,
reset(make_answer_packet(Msg, ReqPkt), Dict, Dict0),
Fs),
+ incr(send, Pkt, TPid, Dict),
incr_rc(send, Pkt, Dict, TPid, Dict0), %% count outgoing
send(TPid, Pkt).
@@ -1035,21 +1057,29 @@ incr_rc(Dir, Pkt, Dict, TPid, Dict0) ->
errors = Es}
= Pkt,
- Id = diameter_codec:msg_id(Hdr),
+ Id = msg_id(Hdr, Dict),
%% Count incoming decode errors.
- recv /= Dir orelse [] == Es orelse incr_error(Dir, Id, TPid),
+ recv /= Dir orelse [] == Es orelse incr_error(Dir, Id, TPid, Dict),
%% Exit on a missing result code.
T = rc_counter(Dict, Msg),
- T == false andalso x(no_result_code, answer, [Dir, Pkt]),
+ T == false andalso ?LOGX(no_result_code, {Dict, Dir, Hdr}),
{Ctr, RC} = T,
%% Or on an inappropriate value.
is_result(RC, E, Dict0)
- orelse x({invalid_error_bit, RC}, answer, [Dir, Pkt]),
+ orelse ?LOGX(invalid_error_bit, {Dict, Dir, Hdr, RC}),
- incr(TPid, {Id, Dir, Ctr}).
+ incr(TPid, {Id, Dir, Ctr}),
+ Ctr.
+
+%% Only count on known keeps so as not to be vulnerable to attack:
+%% there are 2^32 (application ids) * 2^24 (command codes) * 2 (R-bits)
+%% = 2^57 Ids for an attacker to choose from.
+msg_id(Hdr, Dict) ->
+ {_ApplId, Code, R} = Id = diameter_codec:msg_id(Hdr),
+ choose('' == Dict:msg_name(Code, 0 == R), unknown, Id).
%% No E-bit: can't be 3xxx.
is_result(RC, false, _Dict0) ->
@@ -1067,8 +1097,8 @@ is_result(RC, true, _) ->
%% incr/2
-incr(TPid, {_, _, T} = Counter) ->
- {T, diameter_stats:incr(Counter, TPid, 1)}.
+incr(TPid, Counter) ->
+ diameter_stats:incr(Counter, TPid, 1).
%% rc_counter/2
@@ -1112,13 +1142,6 @@ int(N)
int(_) ->
undefined.
--spec x(any(), atom(), list()) -> no_return().
-
-%% Warn and exit request process on errors in an incoming answer.
-x(Reason, F, A) ->
- diameter_lib:warning_report(Reason, {?MODULE, F, A}),
- x(Reason).
-
x(T) ->
exit(T).
@@ -1425,12 +1448,14 @@ handle_answer(SvcName,
%% want to examine the answer?
handle_A(Pkt, SvcName, Dict, Dict0, App, #request{transport = TPid} = Req) ->
+ incr(recv, Pkt, TPid, Dict),
+
try
incr_rc(recv, Pkt, Dict, TPid, Dict0) %% count incoming
of
_ -> answer(Pkt, SvcName, App, Req)
catch
- exit: no_result_code ->
+ exit: {no_result_code, _} ->
%% RFC 6733 requires one of Result-Code or
%% Experimental-Result, but the decode will have detected
%% a missing AVP. If both are optional in the dictionary
@@ -1462,11 +1487,16 @@ a(#diameter_packet{errors = Es}
callback == AE ->
cb(ModX, handle_answer, [Pkt, msg(P), SvcName, {TPid, Caps}]);
-a(Pkt, SvcName, _, report, Req) ->
- x(errors, handle_answer, [SvcName, Req, Pkt]);
+a(Pkt, SvcName, _, AE, _) ->
+ a(Pkt#diameter_packet.header, SvcName, AE).
+
+a(Hdr, SvcName, report) ->
+ MFA = {?MODULE, handle_answer, [SvcName, Hdr]},
+ diameter_lib:warning_report(errors, MFA),
+ a(Hdr, SvcName, discard);
-a(Pkt, SvcName, _, discard, Req) ->
- x({errors, handle_answer, [SvcName, Req, Pkt]}).
+a(Hdr, SvcName, discard) ->
+ x({answer_errors, {SvcName, Hdr}}).
%% Note that we don't check that the application id in the answer's
%% header is what we expect. (TODO: Does the rfc says anything about
@@ -1544,7 +1574,7 @@ encode(Dict, TPid, #diameter_packet{bin = undefined} = Pkt) ->
diameter_codec:encode(Dict, Pkt)
catch
exit: {diameter_codec, encode, T} = Reason ->
- incr_error(send, T, TPid),
+ incr_error(send, T, TPid, Dict),
exit(Reason)
end;
@@ -1652,7 +1682,7 @@ resend_request(Pkt0,
packet = Pkt0,
caps = Caps},
- ?LOG(retransmission, Req),
+ ?LOG(retransmission, Pkt#diameter_packet.header),
TRef = send_request(TPid, Pkt, Req, SvcName, Tmo),
{TRef, Req}.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 19:20:44 +0000