From 404e8ab4615d564a74f92a0d3822b0292dd6224f Mon Sep 17 00:00:00 2001 From: Willy Tarreau Date: Sun, 26 Jul 2009 19:40:40 +0200 Subject: [PATCH] [MINOR] acl: detect and report potential mistakes in ACLs I've discovered a configuration with lots of occurrences of the following : acl xxx hdr_beg (host) xxx The problem is that hdr_beg will match every header against patterns (host) and xxx due to the space between both, which certainly is not what the user wanted. Now we detect such ACLs and report a warning with a suggestion to add "--" between "hdr_beg" and "(host)" if this is definitely what is wanted. --- src/acl.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/src/acl.c b/src/acl.c index f86b1b05f..77ca627e5 100644 --- a/src/acl.c +++ b/src/acl.c @@ -19,6 +19,7 @@ #include #include +#include /* The capabilities of filtering hooks describe the type of information * available to each of them. @@ -761,6 +762,18 @@ struct acl *parse_acl(const char **args, struct list *known_acl) if (!acl_expr) goto out_return; + /* Check for args beginning with an opening parenthesis just after the + * subject, as this is almost certainly a typo. Right now we can only + * emit a warning, so let's do so. + */ + if (*args[2] == '(') + Warning("parsing acl '%s' :\n" + " matching '%s' for pattern '%s' is likely a mistake and probably\n" + " not what you want. Maybe you need to remove the extraneous space before '('.\n" + " If you are really sure this is not an error, please insert '--' between the\n" + " match and the pattern to make this warning message disappear.\n", + args[0], args[1], args[2]); + cur_acl = find_acl_by_name(args[0], known_acl); if (!cur_acl) { name = strdup(args[0]);