1 files changed, 0 insertions, 150 deletions
diff --git a/net/ipv4/netfilter/nf_nat_proto_gre.c b/net/ipv4/netfilter/nf_nat_proto_gre.c
deleted file mode 100644
index 00fda6331ce5..000000000000
--- a/net/ipv4/netfilter/nf_nat_proto_gre.c
+++ /dev/null
@@ -1,150 +0,0 @@
-/*
- * nf_nat_proto_gre.c
- *
- * NAT protocol helper module for GRE.
- *
- * GRE is a generic encapsulation protocol, which is generally not very
- * suited for NAT, as it has no protocol-specific part as port numbers.
- *
- * It has an optional key field, which may help us distinguishing two
- * connections between the same two hosts.
- *
- * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784
- *
- * PPTP is built on top of a modified version of GRE, and has a mandatory
- * field called "CallID", which serves us for the same purpose as the key
- * field in plain GRE.
- *
- * Documentation about PPTP can be found in RFC 2637
- *
- * (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- *
- * (C) 2006-2012 Patrick McHardy <kaber@trash.net>
- *
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-
-#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_l4proto.h>
-#include <linux/netfilter/nf_conntrack_proto_gre.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
-MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
-
-/* generate unique tuple ... */
-static void
-gre_unique_tuple(const struct nf_nat_l3proto *l3proto,
-		 struct nf_conntrack_tuple *tuple,
-		 const struct nf_nat_range2 *range,
-		 enum nf_nat_manip_type maniptype,
-		 const struct nf_conn *ct)
-{
-	static u_int16_t key;
-	__be16 *keyptr;
-	unsigned int min, i, range_size;
-
-	/* If there is no master conntrack we are not PPTP,
-	   do not change tuples */
-	if (!ct->master)
-		return;
-
-	if (maniptype == NF_NAT_MANIP_SRC)
-		keyptr = &tuple->src.u.gre.key;
-	else
-		keyptr = &tuple->dst.u.gre.key;
-
-	if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED)) {
-		pr_debug("%p: NATing GRE PPTP\n", ct);
-		min = 1;
-		range_size = 0xffff;
-	} else {
-		min = ntohs(range->min_proto.gre.key);
-		range_size = ntohs(range->max_proto.gre.key) - min + 1;
-	}
-
-	pr_debug("min = %u, range_size = %u\n", min, range_size);
-
-	for (i = 0; ; ++key) {
-		*keyptr = htons(min + key % range_size);
-		if (++i == range_size || !nf_nat_used_tuple(tuple, ct))
-			return;
-	}
-
-	pr_debug("%p: no NAT mapping\n", ct);
-	return;
-}
-
-/* manipulate a GRE packet according to maniptype */
-static bool
-gre_manip_pkt(struct sk_buff *skb,
-	      const struct nf_nat_l3proto *l3proto,
-	      unsigned int iphdroff, unsigned int hdroff,
-	      const struct nf_conntrack_tuple *tuple,
-	      enum nf_nat_manip_type maniptype)
-{
-	const struct gre_base_hdr *greh;
-	struct pptp_gre_header *pgreh;
-
-	/* pgreh includes two optional 32bit fields which are not required
-	 * to be there.  That's where the magic '8' comes from */
-	if (!skb_make_writable(skb, hdroff + sizeof(*pgreh) - 8))
-		return false;
-
-	greh = (void *)skb->data + hdroff;
-	pgreh = (struct pptp_gre_header *)greh;
-
-	/* we only have destination manip of a packet, since 'source key'
-	 * is not present in the packet itself */
-	if (maniptype != NF_NAT_MANIP_DST)
-		return true;
-
-	switch (greh->flags & GRE_VERSION) {
-	case GRE_VERSION_0:
-		/* We do not currently NAT any GREv0 packets.
-		 * Try to behave like "nf_nat_proto_unknown" */
-		break;
-	case GRE_VERSION_1:
-		pr_debug("call_id -> 0x%04x\n", ntohs(tuple->dst.u.gre.key));
-		pgreh->call_id = tuple->dst.u.gre.key;
-		break;
-	default:
-		pr_debug("can't nat unknown GRE version\n");
-		return false;
-	}
-	return true;
-}
-
-static const struct nf_nat_l4proto gre = {
-	.l4proto		= IPPROTO_GRE,
-	.manip_pkt		= gre_manip_pkt,
-	.in_range		= nf_nat_l4proto_in_range,
-	.unique_tuple		= gre_unique_tuple,
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
-	.nlattr_to_range	= nf_nat_l4proto_nlattr_to_range,
-#endif
-};
-
-static int __init nf_nat_proto_gre_init(void)
-{
-	return nf_nat_l4proto_register(NFPROTO_IPV4, &gre);
-}
-
-static void __exit nf_nat_proto_gre_fini(void)
-{
-	nf_nat_l4proto_unregister(NFPROTO_IPV4, &gre);
-}
-
-module_init(nf_nat_proto_gre_init);
-module_exit(nf_nat_proto_gre_fini);
-
-void nf_nat_need_gre(void)
-{
-	return;
-}
-EXPORT_SYMBOL_GPL(nf_nat_need_gre);