From a7fed7620b6eeaba98a558df46bb50a31828b462 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Thu, 21 Apr 2011 11:05:14 +0200 Subject: [PATCH] netfilter: xt_CT: provide info on why a rule was rejected Signed-off-by: Jan Engelhardt Signed-off-by: Patrick McHardy --- net/netfilter/xt_CT.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c index 782e51986a6f..0221d10de75a 100644 --- a/net/netfilter/xt_CT.c +++ b/net/netfilter/xt_CT.c @@ -5,7 +5,7 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ - +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include @@ -95,8 +95,11 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par) if (info->helper[0]) { ret = -ENOENT; proto = xt_ct_find_proto(par); - if (!proto) + if (!proto) { + pr_info("You must specify a L4 protocol, " + "and not use inversions on it.\n"); goto err3; + } ret = -ENOMEM; help = nf_ct_helper_ext_add(ct, GFP_KERNEL); @@ -107,8 +110,10 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par) help->helper = nf_conntrack_helper_try_module_get(info->helper, par->family, proto); - if (help->helper == NULL) + if (help->helper == NULL) { + pr_info("No such helper \"%s\"\n", info->helper); goto err3; + } } __set_bit(IPS_TEMPLATE_BIT, &ct->status); -- 2.20.1