MINOR: checks: add min-recv tcp-check expect option
Some expect rules cannot be satisfied due to inherent ambiguity towards
the received data: in the absence of match, the current behavior is to
be forced to wait either the end of the connection or a buffer full,
whichever comes first. Only then does the matching diagnostic is
considered conclusive. For instance :
tcp-check connect
tcp-check expect !rstring "^error"
tcp-check expect string "valid"
This check will only succeed if the connection is closed by the server before
the check timeout. Otherwise the first expect rule will wait for more data until
"^error" regex matches or the check expires.
Allow the user to explicitly define an amount of data that will be
considered enough to determine the value of the check.
This allows succeeding on negative rstring rules, as previously
in valid condition no match happened, and the matching was repeated
until the end of the connection. This could timeout the check
while no error was happening.
[Cf: I slighly updated the patch. The parameter was renamed and the value is a
signed integer to support -1 as default value to ignore the parameter.]
diff --git a/include/types/checks.h b/include/types/checks.h
index 294adc6..93d552f 100644
--- a/include/types/checks.h
+++ b/include/types/checks.h
@@ -232,6 +232,7 @@
/* sent string is string */
char *string; /* sent or expected string */
int string_len; /* string length */
+ int min_recv; /* Minimum amount of data before an expect can be applied. (default: -1, ignored) */
struct my_regex *expect_regex; /* expected */
int inverse; /* 0 = regular match, 1 = inverse match */
unsigned short port; /* port to connect to */