MAJOR: checks: rework completely bogus state machine
The porting of checks to using connections was totally bogus. Some checks
were considered successful as soon as the connection was established,
regardless of any response. Some errors would be triggered upon recv
if polling was enabled for send or if the send channel was shut down.
Now the behaviour is much better. It would be cleaner to perform the
fd_delete() in wake_srv_chk() and to process failures and timeouts
separately, but this is already a good start.
diff --git a/include/types/server.h b/include/types/server.h
index 87ca0be..ac7ab7b 100644
--- a/include/types/server.h
+++ b/include/types/server.h
@@ -60,6 +60,7 @@
#define SRV_TPROXY_MASK 0x0700 /* bind to a non-local address to reach this server */
#define SRV_SEND_PROXY 0x0800 /* this server talks the PROXY protocol */
#define SRV_NON_STICK 0x1000 /* never add connections allocated to this server to a stick table */
+#define SRV_CHK_RUNNING 0x2000 /* a check is currently running on this server */
/* function which act on servers need to return various errors */
#define SRV_STATUS_OK 0 /* everything is OK. */