[NETFILTER] PPTP helper: Fix compilation of conntrack helper without NAT

This patch fixes compilation of the PPTP conntrack helper when NAT is
configured off.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

net/ipv4/netfilter/ip_conntrack_helper_pptp.c

@@ -270,14 +270,10 @@ exp_gre(struct ip_conntrack *master,
 	exp_orig->expectfn = pptp_expectfn;
 	exp_orig->flags = 0;
 
-	exp_orig->dir = IP_CT_DIR_ORIGINAL;
-
 	/* both expectations are identical apart from tuple */
 	memcpy(exp_reply, exp_orig, sizeof(*exp_reply));
 	memcpy(&exp_reply->tuple, &exp_tuples[1], sizeof(exp_reply->tuple));
 
-	exp_reply->dir = !exp_orig->dir;
-
 	if (ip_nat_pptp_hook_exp_gre)
 		ret = ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply);
 	else {

net/ipv4/netfilter/ip_nat_helper_pptp.c

@@ -216,6 +216,7 @@ pptp_exp_gre(struct ip_conntrack_expect *expect_orig,
 	expect_orig->saved_proto.gre.key = htons(nat_pptp_info->pac_call_id);
 	expect_orig->tuple.src.u.gre.key = htons(nat_pptp_info->pns_call_id);
 	expect_orig->tuple.dst.u.gre.key = htons(ct_pptp_info->pac_call_id);
+	expect_orig->dir = IP_CT_DIR_ORIGINAL;
 	inv_t.src.ip = reply_t->src.ip;
 	inv_t.dst.ip = reply_t->dst.ip;
 	inv_t.src.u.gre.key = htons(nat_pptp_info->pac_call_id);
@@ -233,6 +234,7 @@ pptp_exp_gre(struct ip_conntrack_expect *expect_orig,
 	expect_reply->saved_proto.gre.key = htons(nat_pptp_info->pns_call_id);
 	expect_reply->tuple.src.u.gre.key = htons(nat_pptp_info->pac_call_id);
 	expect_reply->tuple.dst.u.gre.key = htons(ct_pptp_info->pns_call_id);
+	expect_reply->dir = IP_CT_DIR_REPLY;
 	inv_t.src.ip = orig_t->src.ip;
 	inv_t.dst.ip = orig_t->dst.ip;
 	inv_t.src.u.gre.key = htons(nat_pptp_info->pns_call_id);