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Networking: Fix race condition that can cause missing loss-of-connection events. From Max Holtzberg

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This commit is contained in:
Gregory Nutt 2013-09-06 08:25:03 -06:00
parent fb37248343
commit abc006453f
2 changed files with 14 additions and 0 deletions
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3
ChangeLog
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@ -5502,4 +5502,7 @@
changes made to pl2303, but untested (2013-9-5).
* arch/arm/src/sama5/sam_udphs.c: The high-speed device side driver
is now functional (although more testing is always needed) (2013-9-5).
* net/net_monitor.c: Fixes a race condition where a loss of connection
may not be detected when the connection is lost before it has been
accepted (from Max Holtzberg) (2013-9-6).

11
net/net_monitor.c
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@ -132,6 +132,17 @@ int net_startmonitor(FAR struct socket *psock)
conn->connection_private = (void*)psock;
conn->connection_event = connection_event;
/* Check if the connection has already been closed before any callbacks have
* been registered. (Maybe the connection is lost before accept has registered
* the monitoring callback.)
*/
if (conn->tcpstateflags == UIP_CLOSED)
{
connection_event(conn, UIP_CLOSE);
}
return OK;
}