diff options
Diffstat (limited to 'lib/diameter/src/base/diameter_service.erl')
| -rw-r--r-- | lib/diameter/src/base/diameter_service.erl | 89 |
1 files changed, 73 insertions, 16 deletions
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl index c9c3179630..0bba8117a5 100644 --- a/lib/diameter/src/base/diameter_service.erl +++ b/lib/diameter/src/base/diameter_service.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2010-2011. All Rights Reserved. +%% Copyright Ericsson AB 2010-2012. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -65,9 +65,27 @@ -include_lib("diameter/include/diameter.hrl"). -include("diameter_internal.hrl"). +%% The "old" states maintained in this module historically. -define(STATE_UP, up). -define(STATE_DOWN, down). +-type op_state() :: ?STATE_UP + | ?STATE_DOWN. + +%% The RFC 3539 watchdog states that are now maintained, albeit +%% along with the old up/down. okay = up, else down. +-define(WD_INITIAL, initial). +-define(WD_OKAY, okay). +-define(WD_SUSPECT, suspect). +-define(WD_DOWN, down). +-define(WD_REOPEN, reopen). + +-type wd_state() :: ?WD_INITIAL + | ?WD_OKAY + | ?WD_SUSPECT + | ?WD_DOWN + | ?WD_REOPEN. + -define(DEFAULT_TC, 30000). %% RFC 3588 ch 2.1 -define(DEFAULT_TIMEOUT, 5000). %% for outgoing requests -define(RESTART_TC, 1000). %% if restart was this recent @@ -117,7 +135,8 @@ type :: match(connect | accept), ref :: match(reference()), %% key into diameter_config options :: match([diameter:transport_opt()]),%% from start_transport - op_state = ?STATE_DOWN :: match(?STATE_DOWN | ?STATE_UP), + op_state = {?STATE_DOWN, ?WD_INITIAL} + :: match(op_state() | {op_state(), wd_state()}), started = now(), %% at process start conn = false :: match(boolean() | pid())}). %% true at accept, pid() at connection_up (connT key) @@ -516,13 +535,33 @@ transition({reconnect, Pid}, S) -> reconnect(Pid, S), ok; -%% Watchdog is sending notification of a state transition. +%% Watchdog is sending notification of a state transition. Note that +%% the connection_up/down messages are pre-date this message and are +%% still used. A 'watchdog' message will follow these and communicate +%% the same state as was set in handling connection_up/down. transition({watchdog, Pid, {TPid, From, To}}, #state{service_name = SvcName, peerT = PeerT}) -> - #peer{ref = Ref, type = T, options = Opts} + #peer{ref = Ref, type = T, options = Opts, op_state = {OS,_}} + = P = fetch(PeerT, Pid), + insert(PeerT, P#peer{op_state = {OS, To}}), send_event(SvcName, {watchdog, Ref, TPid, {From, To}, {T, Opts}}), ok; +%% Death of a peer process results in the removal of it's peer and any +%% associated conn record when 'DOWN' is received (after this) but the +%% states will be {?STATE_UP, ?WD_DOWN} for a short time. (No real +%% problem since ?WD_* is only used in service_info.) We set ?WD_OKAY +%% as a consequence of connection_up since we know a watchdog is +%% coming. We can't set anything at connection_down since we don't +%% know if the subsequent watchdog message will be ?WD_DOWN or +%% ?WD_SUSPECT. We don't (yet) set ?STATE_* as a consequence of a +%% watchdog message since this requires changing some of the matching +%% on ?STATE_*. +%% +%% Death of a conn process results in connection_down followed by +%% watchdog ?WD_DOWN. The latter doesn't result in the conn record +%% being deleted since 'DOWN' from death of its peer doesn't (yet) +%% deal with the record having been removed. %% Monitor process has died. Just die with a reason that tells %% diameter_config about the happening. If a cleaner shutdown is @@ -887,7 +926,14 @@ accepted(Pid, _TPid, #state{peerT = PeerT} = S) -> fetch(Tid, Key) -> [T] = ets:lookup(Tid, Key), - T. + case T of + #peer{op_state = ?STATE_UP} = P -> + P#peer{op_state = {?STATE_UP, ?WD_OKAY}}; + #peer{op_state = ?STATE_DOWN} = P -> + P#peer{op_state = {?STATE_DOWN, ?WD_DOWN}}; + _ -> + T + end. %%% --------------------------------------------------------------------------- %%% # connection_up/3 @@ -933,12 +979,12 @@ connection_up(T, P, C, #state{peerT = PeerT, service = #diameter_service{applications = Apps}} = S) -> - #peer{conn = TPid, op_state = ?STATE_DOWN} + #peer{conn = TPid, op_state = {?STATE_DOWN, _}} = P, #conn{apps = SApps, caps = Caps} = C, - insert(PeerT, P#peer{op_state = ?STATE_UP}), + insert(PeerT, P#peer{op_state = {?STATE_UP, ?WD_OKAY}}), request_peer_up(TPid), report_status(up, P, C, S, T), @@ -987,22 +1033,22 @@ peer_cb(MFA, Alias) -> connection_down(Pid, #state{peerT = PeerT, connT = ConnT} = S) -> - #peer{op_state = ?STATE_UP, %% assert + #peer{op_state = {?STATE_UP, WS}, %% assert conn = TPid} = P = fetch(PeerT, Pid), C = fetch(ConnT, TPid), - insert(PeerT, P#peer{op_state = ?STATE_DOWN}), + insert(PeerT, P#peer{op_state = {?STATE_DOWN, WS}}), connection_down(P,C,S). %% connection_down/3 -connection_down(#peer{op_state = ?STATE_DOWN}, _, S) -> +connection_down(#peer{op_state = {?STATE_DOWN, _}}, _, S) -> S; connection_down(#peer{conn = TPid, - op_state = ?STATE_UP} + op_state = {?STATE_UP, _}} = P, #conn{caps = Caps, apps = SApps} @@ -1051,7 +1097,7 @@ peer_down(Pid, Reason, #state{peerT = PeerT} = S) -> %% Send an event at connection establishment failure. closed({shutdown, {close, _TPid, Reason}}, - #peer{op_state = ?STATE_DOWN, + #peer{op_state = {?STATE_DOWN, _}, ref = Ref, type = Type, options = Opts}, @@ -2858,15 +2904,26 @@ it_acc(ConnT, Acc, #peer{pid = Pid, op_state = OS, started = T, conn = TPid}) -> + WS = wd_state(OS), dict:append(Ref, [{type, Type}, {options, Opts}, - {watchdog, {Pid, T, OS}} - | info_conn(ConnT, TPid)], + {watchdog, {Pid, T, WS}} + | info_conn(ConnT, TPid, WS /= ?WD_DOWN)], Acc). -info_conn(ConnT, TPid) -> - info_conn(ets:lookup(ConnT, TPid)). +info_conn(ConnT, TPid, true) + when is_pid(TPid) -> + info_conn(ets:lookup(ConnT, TPid)); +info_conn(_, _, _) -> + []. + +wd_state({_,S}) -> + S; +wd_state(?STATE_UP) -> + ?WD_OKAY; +wd_state(?STATE_DOWN) -> + ?WD_DOWN. info_conn([#conn{pid = Pid, apps = SApps, caps = Caps, started = T}]) -> [{peer, {Pid, T}}, |