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authorAnders Svensson <[email protected]>2011-10-12 15:42:31 +0200
committerAnders Svensson <[email protected]>2012-08-26 16:45:40 +0200
commit9a671bf0c1b0000f6fd8f35f44eb25348e0b415d (patch)
tree374a9612eeda6c43b04bbe09119cf2f4f1b2f99c /lib
parentcfea5eea406ba3af96588ff458e55de9a149d9c5 (diff)
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Use gen_sctp:peeloff/2 to transfer association ownership
The transport process is now controlling process even in the accept case.
Diffstat (limited to 'lib')
-rw-r--r--lib/diameter/src/transport/diameter_sctp.erl88
1 files changed, 52 insertions, 36 deletions
diff --git a/lib/diameter/src/transport/diameter_sctp.erl b/lib/diameter/src/transport/diameter_sctp.erl
index 68b0342cd5..e0cb30e22a 100644
--- a/lib/diameter/src/transport/diameter_sctp.erl
+++ b/lib/diameter/src/transport/diameter_sctp.erl
@@ -62,6 +62,7 @@
-record(transport,
{parent :: pid(),
mode :: {accept, pid()}
+ | accept
| {connect, {list(inet:ip_address()), uint(), list()}}
%% {RAs, RP, Errors}
| connect,
@@ -325,6 +326,11 @@ terminate(_, #transport{assoc_id = undefined}) ->
ok;
terminate(_, #transport{socket = Sock,
+ mode = accept,
+ assoc_id = Id}) ->
+ close(Sock, Id);
+
+terminate(_, #transport{socket = Sock,
mode = {accept, _},
assoc_id = Id}) ->
close(Sock, Id);
@@ -356,13 +362,16 @@ start_timer(S) ->
%% Incoming message from SCTP.
l({sctp, Sock, _RA, _RP, Data} = Msg, #listener{socket = Sock} = S) ->
- setopts(Sock),
- case find(Data, S) of
+ Id = assoc_id(Data),
+
+ try find(Id, Data, S) of
{TPid, NewS} ->
- TPid ! Msg,
+ TPid ! {peeloff, peeloff(Sock, Id, TPid), Msg},
NewS;
false ->
S
+ after
+ setopts(Sock)
end;
%% Transport is asking message to be sent. See send/3 for why the send
@@ -430,15 +439,19 @@ t(T,S) ->
%% transition/2
-%% Incoming message.
-transition({sctp, Sock, _RA, _RP, Data}, #transport{socket = Sock,
- mode = {accept, _}}
- = S) ->
- recv(Data, S);
+%% Listening process is transfering ownership of an association.
+transition({peeloff, Sock, {sctp, LSock, _RA, _RP, _Data} = Msg},
+ #transport{mode = {accept, _},
+ socket = LSock}
+ = S) ->
+ transition(Msg, S#transport{socket = Sock});
-transition({sctp, Sock, _RA, _RP, Data}, #transport{socket = Sock} = S) ->
+%% Incoming message.
+transition({sctp, _Sock, _RA, _RP, Data}, #transport{socket = Sock} = S) ->
setopts(Sock),
recv(Data, S);
+%% Don't match on Sock since in R15B01 it can be the listening socket
+%% in the (peeled-off) accept case, which is likely a bug.
%% Outgoing message.
transition({diameter, {send, Msg}}, S) ->
@@ -456,13 +469,18 @@ transition({diameter, {close, Pid}}, #transport{parent = Pid}) ->
transition({diameter, {tls, _Ref, _Type, _Bool}}, _) ->
stop;
+%% Parent process has died.
+transition({'DOWN', _, process, Pid, _}, #transport{parent = Pid}) ->
+ stop;
+
%% Listener process has died.
transition({'DOWN', _, process, Pid, _}, #transport{mode = {accept, Pid}}) ->
stop;
-%% Parent process has died.
-transition({'DOWN', _, process, Pid, _}, #transport{parent = Pid}) ->
- stop;
+%% Ditto but we have ownership of the association. It might be that
+%% we'll go down anyway though.
+transition({'DOWN', _, process, _Pid, _}, #transport{mode = accept}) ->
+ ok;
%% Request for the local port number.
transition({resolve_port, Pid}, #transport{socket = Sock})
@@ -521,14 +539,6 @@ send(Bin, #transport{streams = {_, OS},
%% send/3
-%% Messages have to be sent from the controlling process, which is
-%% probably a bug. Sending from here causes an inet_reply, Sock,
-%% Status} message to be sent to the controlling process while
-%% gen_sctp:send/4 here hangs.
-send(StreamId, Bin, #transport{assoc_id = AId,
- mode = {accept, LPid}}) ->
- LPid ! {send, AId, StreamId, Bin};
-
send(StreamId, Bin, #transport{socket = Sock,
assoc_id = AId}) ->
send(Sock, AId, StreamId, Bin).
@@ -608,21 +618,15 @@ up(#transport{parent = Pid,
S#transport{mode = C};
up(#transport{parent = Pid,
- mode = {accept, _}}
+ mode = {accept = A, _}}
= S) ->
diameter_peer:up(Pid),
- S.
+ S#transport{mode = A}.
-%% find/2
+%% find/3
-find({[#sctp_sndrcvinfo{assoc_id = Id}], _}
- = Data,
- #listener{tmap = T}
- = S) ->
- f(ets:lookup(T, Id), Data, S);
-
-find({_, Rec} = Data, #listener{tmap = T} = S) ->
- f(ets:lookup(T, assoc_id(Rec)), Data, S).
+find(Id, Data, #listener{tmap = T} = S) ->
+ f(ets:lookup(T, Id), Data, S).
%% New association and a transport waiting for one: use it.
f([],
@@ -663,17 +667,29 @@ f([], _, _) ->
%% assoc_id/1
-assoc_id(#sctp_shutdown_event{assoc_id = Id}) ->
+assoc_id({[#sctp_sndrcvinfo{assoc_id = Id}], _}) ->
+ Id;
+assoc_id({_, Rec}) ->
+ id(Rec).
+
+id(#sctp_shutdown_event{assoc_id = Id}) ->
Id;
-assoc_id(#sctp_assoc_change{assoc_id = Id}) ->
+id(#sctp_assoc_change{assoc_id = Id}) ->
Id;
-assoc_id(#sctp_sndrcvinfo{assoc_id = Id}) ->
+id(#sctp_sndrcvinfo{assoc_id = Id}) ->
Id;
-assoc_id(#sctp_paddr_change{assoc_id = Id}) ->
+id(#sctp_paddr_change{assoc_id = Id}) ->
Id;
-assoc_id(#sctp_adaptation_event{assoc_id = Id}) ->
+id(#sctp_adaptation_event{assoc_id = Id}) ->
Id.
+%% peeloff/3
+
+peeloff(LSock, Id, TPid) ->
+ {ok, Sock} = gen_sctp:peeloff(LSock, Id),
+ ok = gen_sctp:controlling_process(Sock, TPid),
+ Sock.
+
%% connect/4
connect(_, [], _, Reasons) ->