[NETFILTER]: nf_conntrack_netlink: clean up NAT protocol parsing
Move responsibility for setting the IP_NAT_RANGE_PROTO_SPECIFIED flag
to the NAT protocol, properly propagate errors and get rid of ugly
return value convention.
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/ipv4/netfilter/nf_nat_proto_common.c b/net/ipv4/netfilter/nf_nat_proto_common.c
index ef4dc39..4904b862 100644
--- a/net/ipv4/netfilter/nf_nat_proto_common.c
+++ b/net/ipv4/netfilter/nf_nat_proto_common.c
@@ -105,24 +105,16 @@
int nf_nat_proto_nlattr_to_range(struct nlattr *tb[],
struct nf_nat_range *range)
{
- int ret = 0;
-
- /* we have to return whether we actually parsed something or not */
-
if (tb[CTA_PROTONAT_PORT_MIN]) {
- ret = 1;
range->min.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
+ range->max.all = range->min.tcp.port;
+ range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
}
-
- if (!tb[CTA_PROTONAT_PORT_MAX]) {
- if (ret)
- range->max.all = range->min.all;
- } else {
- ret = 1;
+ if (tb[CTA_PROTONAT_PORT_MAX]) {
range->max.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]);
+ range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
}
-
- return ret;
+ return 0;
}
EXPORT_SYMBOL_GPL(nf_nat_proto_range_to_nlattr);
#endif
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4a1b42b..79d5ecd 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -705,19 +705,10 @@
return err;
npt = nf_nat_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
-
- if (!npt->nlattr_to_range) {
- nf_nat_proto_put(npt);
- return 0;
- }
-
- /* nlattr_to_range returns 1 if it parsed, 0 if not, neg. on error */
- if (npt->nlattr_to_range(tb, range) > 0)
- range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
-
+ if (npt->nlattr_to_range)
+ err = npt->nlattr_to_range(tb, range);
nf_nat_proto_put(npt);
-
- return 0;
+ return err;
}
static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
