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authorJan Engelhardt <jengelh@inai.de>2013-01-10 12:30:05 +0000
committerPablo Neira Ayuso <pablo@netfilter.org>2013-01-13 12:54:12 +0100
commit5b76c4948fe6977bead2359c2054f3e6a2dcf3d0 (patch)
tree84ddb40fd0bc96f882ecca646b4966b2b717c377 /net/netfilter
parent1e47ee8367babe6a5e8adf44a714c7086657b87e (diff)
downloadvexpress-lsk-5b76c4948fe6977bead2359c2054f3e6a2dcf3d0.tar.gz
netfilter: x_tables: print correct hook names for ARP
arptables 0.0.4 (released on 10th Jan 2013) supports calling the CLASSIFY target, but on adding a rule to the wrong chain, the diagnostic is as follows: # arptables -A INPUT -j CLASSIFY --set-class 0:0 arptables: Invalid argument # dmesg | tail -n1 x_tables: arp_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from INPUT/FORWARD This is incorrect, since xt_CLASSIFY.c does specify (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD). This patch corrects the x_tables diagnostic message to print the proper hook names for the NFPROTO_ARP case. Affects all kernels down to and including v2.6.31. Signed-off-by: Jan Engelhardt <jengelh@inai.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
-rw-r--r--net/netfilter/x_tables.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 8d987c3573f..7b3a9e5999c 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -345,19 +345,27 @@ int xt_find_revision(u8 af, const char *name, u8 revision, int target,
}
EXPORT_SYMBOL_GPL(xt_find_revision);
-static char *textify_hooks(char *buf, size_t size, unsigned int mask)
+static char *
+textify_hooks(char *buf, size_t size, unsigned int mask, uint8_t nfproto)
{
- static const char *const names[] = {
+ static const char *const inetbr_names[] = {
"PREROUTING", "INPUT", "FORWARD",
"OUTPUT", "POSTROUTING", "BROUTING",
};
- unsigned int i;
+ static const char *const arp_names[] = {
+ "INPUT", "FORWARD", "OUTPUT",
+ };
+ const char *const *names;
+ unsigned int i, max;
char *p = buf;
bool np = false;
int res;
+ names = (nfproto == NFPROTO_ARP) ? arp_names : inetbr_names;
+ max = (nfproto == NFPROTO_ARP) ? ARRAY_SIZE(arp_names) :
+ ARRAY_SIZE(inetbr_names);
*p = '\0';
- for (i = 0; i < ARRAY_SIZE(names); ++i) {
+ for (i = 0; i < max; ++i) {
if (!(mask & (1 << i)))
continue;
res = snprintf(p, size, "%s%s", np ? "/" : "", names[i]);
@@ -402,8 +410,10 @@ int xt_check_match(struct xt_mtchk_param *par,
pr_err("%s_tables: %s match: used from hooks %s, but only "
"valid from %s\n",
xt_prefix[par->family], par->match->name,
- textify_hooks(used, sizeof(used), par->hook_mask),
- textify_hooks(allow, sizeof(allow), par->match->hooks));
+ textify_hooks(used, sizeof(used), par->hook_mask,
+ par->family),
+ textify_hooks(allow, sizeof(allow), par->match->hooks,
+ par->family));
return -EINVAL;
}
if (par->match->proto && (par->match->proto != proto || inv_proto)) {
@@ -575,8 +585,10 @@ int xt_check_target(struct xt_tgchk_param *par,
pr_err("%s_tables: %s target: used from hooks %s, but only "
"usable from %s\n",
xt_prefix[par->family], par->target->name,
- textify_hooks(used, sizeof(used), par->hook_mask),
- textify_hooks(allow, sizeof(allow), par->target->hooks));
+ textify_hooks(used, sizeof(used), par->hook_mask,
+ par->family),
+ textify_hooks(allow, sizeof(allow), par->target->hooks,
+ par->family));
return -EINVAL;
}
if (par->target->proto && (par->target->proto != proto || inv_proto)) {