commit b51e0742b9349c6414956570c76a2152f5b22106
author Jay Satiro <raysatiro@yahoo.com> Thu Nov 02 00:30:28 2017 -0400
committer Jay Satiro <raysatiro@yahoo.com> Thu Nov 02 00:30:28 2017 -0400
tree e81d21b23a4f4157133fd3880731abb9b1438b4b
parent 544bfdebea2a9e8be1c01fc7954cd49638fe2803

url: fix CURLOPT_DNS_CACHE_TIMEOUT arg value check to allow -1

Prior to this change since f121575 (7.56.1+) CURLOPT_DNS_CACHE_TIMEOUT
erroneously rejected -1 with CURLE_BAD_FUNCTION_ARGUMENT.

lib/url.c

diff --git a/lib/url.c b/lib/url.c
index c334578..2e801e5 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -722,7 +722,7 @@
   switch(option) {
   case CURLOPT_DNS_CACHE_TIMEOUT:
     arg = va_arg(param, long);
-    if(arg < 0)
+    if(arg < -1)
       return CURLE_BAD_FUNCTION_ARGUMENT;
     data->set.dns_cache_timeout = arg;
     break;