diff options
Diffstat (limited to 'lib/diameter/src/base/diameter_traffic.erl')
| -rw-r--r-- | lib/diameter/src/base/diameter_traffic.erl | 88 |
1 files changed, 45 insertions, 43 deletions
diff --git a/lib/diameter/src/base/diameter_traffic.erl b/lib/diameter/src/base/diameter_traffic.erl index 692a01e651..c169d3fc2c 100644 --- a/lib/diameter/src/base/diameter_traffic.erl +++ b/lib/diameter/src/base/diameter_traffic.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2013-2015. All Rights Reserved. +%% Copyright Ericsson AB 2013-2016. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -41,7 +41,6 @@ -export([make_recvdata/1, peer_up/1, peer_down/1, - failover/1, pending/1]). %% towards ?MODULE @@ -80,6 +79,7 @@ apps :: [#diameter_app{}], sequence :: diameter:sequence(), codec :: [{string_decode, boolean()} + | {strict_mbit, boolean()} | {incoming_maxlen, diameter:message_length()}]}). %% Note that incoming_maxlen is currently handled in diameter_peer_fsm, %% so that any message exceeding the maximum is discarded. Retain the @@ -106,7 +106,8 @@ make_recvdata([SvcName, PeerT, Apps, SvcOpts | _]) -> sequence = Mask, codec = [T || {K,_} = T <- SvcOpts, lists:member(K, [string_decode, - incoming_maxlen])]}. + incoming_maxlen, + strict_mbit])]}. %% --------------------------------------------------------------------------- %% peer_up/1 @@ -167,7 +168,7 @@ incr_error(Dir, Id, TPid, _) -> incr_error(Dir, Id, TPid) -> incr(TPid, {Id, Dir, error}). - + %% --------------------------------------------------------------------------- %% incr_rc/4 %% --------------------------------------------------------------------------- @@ -1483,16 +1484,12 @@ send_R(Pkt0, caps = Caps, packet = Pkt0}, - try - incr(send, Pkt, TPid, AppDict), - TRef = send_request(TPid, Pkt, Req, SvcName, Timeout), - Pid ! Ref, %% tell caller a send has been attempted - handle_answer(SvcName, - App, - recv_A(Timeout, SvcName, App, Opts, {TRef, Req})) - after - erase_requests(Pkt) - end. + incr(send, Pkt, TPid, AppDict), + TRef = send_request(TPid, Pkt, Req, SvcName, Timeout), + Pid ! Ref, %% tell caller a send has been attempted + handle_answer(SvcName, + App, + recv_A(Timeout, SvcName, App, Opts, {TRef, Req})). %% recv_A/5 @@ -1568,6 +1565,8 @@ answer(Pkt, Req) -> a(Pkt, SvcName, ModX, AE, Req). +-spec a(_, _, _) -> no_return(). %% silence dialyzer + a(#diameter_packet{errors = Es} = Pkt, SvcName, @@ -1692,9 +1691,18 @@ encode(_, _, #diameter_packet{} = Pkt) -> send_request(TPid, #diameter_packet{bin = Bin} = Pkt, Req, _SvcName, Timeout) when node() == node(TPid) -> - %% Store the outgoing request before sending to avoid a race with - %% reply reception. - TRef = store_request(TPid, Bin, Req, Timeout), + Seqs = diameter_codec:sequence_numbers(Bin), + TRef = erlang:start_timer(Timeout, self(), TPid), + Entry = {Seqs, Req, TRef}, + + %% Ensure that request table is cleaned even if we receive an exit + %% signal. An alternative would be to simply trap exits, but + %% callbacks are applied in this process, and these could possibly + %% be expecting the prevailing behaviour. + Self = self(), + spawn(fun() -> diameter_lib:wait([Self]), erase_request(Entry) end), + + store_request(Entry, TPid), send(TPid, Pkt), TRef; @@ -1709,31 +1717,21 @@ send_request(TPid, #diameter_packet{} = Pkt, Req, SvcName, Timeout) -> %% send/1 send({TPid, Pkt, #request{handler = Pid} = Req0, SvcName, Timeout, TRef}) -> - Seqs = diameter_codec:sequence_numbers(Pkt), Req = Req0#request{handler = self()}, - Ref = send_request(TPid, Pkt, Req, SvcName, Timeout), - - try - recv(TPid, Pid, TRef, Ref) - after - %% Remove only the entry for this specific send since a resend - %% from the originating node can pick another transport on - %% this one. - ets:delete_object(?REQUEST_TABLE, {Seqs, Req, Ref}) - end. + recv(TPid, Pid, TRef, send_request(TPid, Pkt, Req, SvcName, Timeout)). %% recv/4 %% %% Relay an answer from a remote node. -recv(TPid, Pid, TRef, Ref) -> +recv(TPid, Pid, TRef, LocalTRef) -> receive {answer, _, _, _, _} = A -> Pid ! A; - {failover = T, Ref} -> + {failover = T, LocalTRef} -> Pid ! {T, TRef}; T -> - exit({timeout, Ref, TPid} = T) + exit({timeout, LocalTRef, TPid} = T) end. %% send/2 @@ -1810,17 +1808,21 @@ resend_request(Pkt0, TRef = send_request(TPid, Pkt, Req, SvcName, Tmo), {TRef, Req}. -%% store_request/4 +%% store_request/2 -store_request(TPid, Bin, Req, Timeout) -> - Seqs = diameter_codec:sequence_numbers(Bin), - TRef = erlang:start_timer(Timeout, self(), TPid), - ets:insert(?REQUEST_TABLE, {Seqs, Req, TRef}), +store_request(T, TPid) -> + ets:insert(?REQUEST_TABLE, T), ets:member(?REQUEST_TABLE, TPid) - orelse (self() ! {failover, TRef}), %% failover/1 may have missed - TRef. + orelse begin + {_Seqs, _Req, TRef} = T, + self() ! {failover, TRef} %% failover/1 may have missed + end. %% lookup_request/2 +%% +%% Note the match on both the key and transport pid. The latter is +%% necessary since the same Hop-by-Hop and End-to-End identifiers are +%% reused in the case of retransmission. lookup_request(Msg, TPid) -> Seqs = diameter_codec:sequence_numbers(Msg), @@ -1834,10 +1836,10 @@ lookup_request(Msg, TPid) -> false end. -%% erase_requests/1 +%% erase_request/1 -erase_requests(Pkt) -> - ets:delete(?REQUEST_TABLE, diameter_codec:sequence_numbers(Pkt)). +erase_request(T) -> + ets:delete_object(?REQUEST_TABLE, T). %% match_requests/1 @@ -1860,10 +1862,10 @@ failover(TPid) when is_pid(TPid) -> lists:foreach(fun failover/1, match_requests(TPid)); %% Note that a request process can store its request after failover -%% notifications are sent here: store_request/4 sends the notification +%% notifications are sent here: store_request/2 sends the notification %% in that case. -%% Failover as a consequence of request_peer_down/1: inform the +%% Failover as a consequence of peer_down/1: inform the %% request process. failover({_, Req, TRef}) -> #request{handler = Pid, |