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-rw-r--r--lib/diameter/src/transport/diameter_tcp.erl38
1 files changed, 25 insertions, 13 deletions
diff --git a/lib/diameter/src/transport/diameter_tcp.erl b/lib/diameter/src/transport/diameter_tcp.erl
index 080eff2055..132088b514 100644
--- a/lib/diameter/src/transport/diameter_tcp.erl
+++ b/lib/diameter/src/transport/diameter_tcp.erl
@@ -88,7 +88,8 @@
frag = <<>> :: frag(), %% message fragment
ssl :: boolean() | [term()], %% ssl options
timeout :: infinity | 0..16#FFFFFFFF, %% fragment timeout
- flush = false :: boolean()}). %% flush fragment at timeout
+ tref = false :: false | reference(), %% fragment timer reference
+ flush = false :: boolean()}). %% flush fragment at timeout?
%% The usual transport using gen_tcp can be replaced by anything
%% sufficiently gen_tcp-like by passing a 'module' option as the first
%% (for simplicity) transport option. The transport_module diameter_etcp
@@ -176,7 +177,6 @@ i({T, Ref, Mod, Pid, Opts, Addrs})
M = if SslOpts -> ssl; true -> Mod end,
setopts(M, Sock),
putr(?REF_KEY, Ref),
- infinity == Tmo orelse erlang:start_timer(Tmo, self(), flush),
#transport{parent = Pid,
module = M,
socket = Sock,
@@ -465,6 +465,7 @@ t(T,S) ->
%% Initial incoming message when we might need to upgrade to TLS:
%% don't request another message until we know.
+
transition({tcp, Sock, Bin}, #transport{socket = Sock,
parent = Pid,
frag = Head,
@@ -478,7 +479,7 @@ transition({tcp, Sock, Bin}, #transport{socket = Sock,
S#transport{frag = B};
Frag ->
setopts(M, Sock),
- S#transport{frag = Frag}
+ start_fragment_timer(S#transport{frag = Frag})
end;
%% Incoming message.
@@ -489,7 +490,7 @@ transition({P, Sock, Bin}, #transport{socket = Sock,
when P == tcp, not B;
P == ssl, B ->
setopts(M, Sock),
- recv(Bin, S);
+ start_fragment_timer(recv(Bin, S));
%% Capabilties exchange has decided on whether or not to run over TLS.
transition({diameter, {tls, Ref, Type, B}}, #transport{parent = Pid}
@@ -500,7 +501,7 @@ transition({diameter, {tls, Ref, Type, B}}, #transport{parent = Pid}
= tls_handshake(Type, B, S),
Pid ! {diameter, {tls, Ref}},
setopts(M, Sock),
- NS#transport{ssl = B};
+ start_fragment_timer(NS#transport{ssl = B});
transition({C, Sock}, #transport{socket = Sock,
ssl = B})
@@ -533,9 +534,8 @@ transition({diameter, {close, Pid}}, #transport{parent = Pid,
stop;
%% Timeout for reception of outstanding packets.
-transition({timeout, _TRef, flush}, #transport{timeout = Tmo} = S) ->
- erlang:start_timer(Tmo, self(), flush),
- flush(S);
+transition({timeout, TRef, flush}, #transport{tref = TRef} = S) ->
+ flush(S#transport{tref = false});
%% Request for the local port number.
transition({resolve_port, Pid}, #transport{socket = Sock,
@@ -684,19 +684,31 @@ bin(Bin)
%% since all messages with length problems are discarded this should
%% also eventually lead to watchdog failover.
+%% No fragment to flush.
+flush(#transport{frag = <<>>} = S) ->
+ S;
+
%% Messages have been received since last timer expiry.
flush(#transport{flush = false} = S) ->
- S#transport{flush = true};
-
-%% No fragment to flush.
-flush(#transport{frag = <<>>}) ->
- ok;
+ start_fragment_timer(S#transport{flush = true});
%% No messages since last expiry.
flush(#transport{frag = Frag, parent = Pid} = S) ->
diameter_peer:recv(Pid, bin(Frag)),
S#transport{frag = <<>>}.
+%% start_fragment_timer/1
+%%
+%% Start a timer only if there's none running and a message to flush.
+
+start_fragment_timer(#transport{frag = B, tref = TRef} = S)
+ when B == <<>>;
+ TRef /= false ->
+ S;
+
+start_fragment_timer(#transport{timeout = Tmo} = S) ->
+ S#transport{tref = erlang:start_timer(Tmo, self(), flush)}.
+
%% accept/2
accept(ssl, LSock) ->