Chapril/xmpp.chapril.org-ejabberd
25
1
Fork 0
mirror of https://github.com/processone/ejabberd.git synced 2024-11-26 16:26:24 +01:00
Code Releases Activity

XEP-0198: Improve handling of too large 'h' values

Browse Source 
If the client says that it handled more stanzas than we sent (due to a
bug in the client's or in our code), increase our outgoing stanza count
accordingly.  There's no point in sticking to the old value even if it
was correct, as the client surely won't fix its count during the current
session.
This commit is contained in:
Holger Weiss 2014-05-09 18:28:14 +02:00
parent 15369ff9d7
commit 6d5bfcfe9b
1 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/ejabberd_c2s.erl
View File

@ -2686,16 +2686,13 @@ handle_r(StateData) ->
send_element(StateData, Res),
StateData.
handle_a(#state{jid = JID, mgmt_stanzas_out = NumStanzasOut} = StateData,
Attrs) ->
handle_a(StateData, Attrs) ->
case catch jlib:binary_to_integer(xml:get_attr_s(<<"h">>, Attrs)) of
H when is_integer(H), H >= 0 ->
?DEBUG("~s acknowledged ~B of ~B stanzas",
[jlib:jid_to_string(JID), H, NumStanzasOut]),
mgmt_queue_drop(StateData, H);
check_h_attribute(StateData, H);
_ ->
?DEBUG("Ignoring invalid ACK element from ~s",
[jlib:jid_to_string(JID)]),
[jlib:jid_to_string(StateData#state.jid)]),
StateData
end.
@ -2728,7 +2725,7 @@ handle_resume(StateData, Attrs) ->
end,
case R of
{ok, ResumedState, NumHandled} ->
NewState = mgmt_queue_drop(ResumedState, NumHandled),
NewState = check_h_attribute(ResumedState, NumHandled),
AttrXmlns = NewState#state.mgmt_xmlns,
AttrId = make_resume_id(NewState),
AttrH = jlib:integer_to_binary(NewState#state.mgmt_stanzas_in),
@ -2754,6 +2751,16 @@ handle_resume(StateData, Attrs) ->
error
end.
check_h_attribute(#state{mgmt_stanzas_out = NumStanzasOut} = StateData, H)
when H > NumStanzasOut ->
?DEBUG("~s acknowledged ~B stanzas, but only ~B were sent",
[jlib:jid_to_string(StateData#state.jid), H, NumStanzasOut]),
mgmt_queue_drop(StateData#state{mgmt_stanzas_out = H}, NumStanzasOut);
check_h_attribute(#state{mgmt_stanzas_out = NumStanzasOut} = StateData, H) ->
?DEBUG("~s acknowledged ~B of ~B stanzas",
[jlib:jid_to_string(StateData#state.jid), H, NumStanzasOut]),
mgmt_queue_drop(StateData, H).
update_num_stanzas_in(#state{mgmt_state = active} = StateData, El) ->
NewNum = case {is_stanza(El), StateData#state.mgmt_stanzas_in} of
{true, 4294967295} ->