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-rw-r--r--lib/diameter/src/base/diameter_watchdog.erl18
1 files changed, 8 insertions, 10 deletions
diff --git a/lib/diameter/src/base/diameter_watchdog.erl b/lib/diameter/src/base/diameter_watchdog.erl
index 0b32974efe..82ca603cf3 100644
--- a/lib/diameter/src/base/diameter_watchdog.erl
+++ b/lib/diameter/src/base/diameter_watchdog.erl
@@ -49,6 +49,8 @@
-define(IS_NATURAL(N), (is_integer(N) andalso 0 =< N)).
+-define(CHOOSE(B,T,F), if (B) -> T; true -> F end).
+
-record(config,
{suspect = 1 :: non_neg_integer(), %% OKAY -> SUSPECT
okay = 3 :: non_neg_integer()}). %% REOPEN -> OKAY
@@ -61,7 +63,7 @@
%% {M,F,A} -> integer() >= 0
num_dwa = 0 :: -1 | non_neg_integer(),
%% number of DWAs received in reopen,
- %% or to send in okay before moving to suspect
+ %% or number of timeouts before okay -> suspect
%% end PCB
parent = self() :: pid(), %% service process
transport :: pid() | undefined, %% peer_fsm process
@@ -424,7 +426,7 @@ transition({'DOWN', _, process, TPid, _Reason},
#watchdog{transport = TPid,
status = T}
= S) ->
- set_watchdog(S#watchdog{status = case T of initial -> T; _ -> down end,
+ set_watchdog(S#watchdog{status = ?CHOOSE(initial == T, T, down),
pending = false,
transport = undefined});
@@ -668,9 +670,10 @@ timeout(#watchdog{status = okay,
case N of
1 ->
S#watchdog{status = suspect};
- _ -> %% non-standard
- send_watchdog(S#watchdog{pending = false,
- num_dwa = decr(N)})
+ 0 -> %% non-standard: never move to suspect
+ S;
+ N -> %% non-standard: more timeouts before moving
+ S#watchdog{num_dwa = N-1}
end;
%% SUSPECT Timer expires CloseConnection()
@@ -725,11 +728,6 @@ timeout(#watchdog{status = T} = S)
T == down ->
restart(S).
-decr(0 = N) ->
- N;
-decr(N) ->
- N-1.
-
%% restart/1
restart(#watchdog{transport = undefined} = S) ->