tree 0a2e5418f92c4665e24f3fda336cf1027b9e5970
parent 3543cdbd173902cf38ad3085045e3b97bd5b46f0
author Willy Tarreau <w@1wt.eu> 1399708108 +0200
committer Willy Tarreau <w@1wt.eu> 1399708108 +0200
encoding latin1

MEDIUM: unix: avoid a double connect probe when no data are sent

Plain "tcp" health checks sent to a unix socket cause two connect()
calls to be made, one to connect, and a second one to verify that the
connection properly established. But with unix sockets, we get
immediate notification of success, so we can avoid this second
attempt. However we need to ensure that we'll visit the connection
handler even if there's no remaining handshake pending, so for this
we claim we have some data to send in order to enable polling for
writes if there's no more handshake.