netfilter: nf_nat: support IPv6 in FTP NAT helper

Signed-off-by: Patrick McHardy <kaber@trash.net>

3 files changed, 0 insertions, 143 deletions

diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index b266296..8c6c692 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -221,11 +221,6 @@ config NF_NAT_PROTO_GRE
 	tristate
 	depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
 
-config NF_NAT_FTP
-	tristate
-	depends on NF_CONNTRACK && NF_NAT_IPV4
-	default NF_NAT_IPV4 && NF_CONNTRACK_FTP
-
 config NF_NAT_IRC
 	tristate
 	depends on NF_CONNTRACK && NF_NAT_IPV4
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 0ea3acc..4d8a4ad 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
 
 # NAT helpers (nf_conntrack)
 obj-$(CONFIG_NF_NAT_AMANDA) += nf_nat_amanda.o
-obj-$(CONFIG_NF_NAT_FTP) += nf_nat_ftp.o
 obj-$(CONFIG_NF_NAT_H323) += nf_nat_h323.o
 obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o
 obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o
diff --git a/net/ipv4/netfilter/nf_nat_ftp.c b/net/ipv4/netfilter/nf_nat_ftp.c
deleted file mode 100644
index dd5e387..0000000
--- a/net/ipv4/netfilter/nf_nat_ftp.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/* FTP extension for TCP NAT alteration. */
-
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/ip.h>
-#include <linux/tcp.h>
-#include <linux/netfilter_ipv4.h>
-#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_conntrack_helper.h>
-#include <net/netfilter/nf_conntrack_expect.h>
-#include <linux/netfilter/nf_conntrack_ftp.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Rusty Russell <rusty@rustcorp.com.au>");
-MODULE_DESCRIPTION("ftp NAT helper");
-MODULE_ALIAS("ip_nat_ftp");
-
-/* FIXME: Time out? --RR */
-
-static int nf_nat_ftp_fmt_cmd(enum nf_ct_ftp_type type,
-			      char *buffer, size_t buflen,
-			      __be32 addr, u16 port)
-{
-	switch (type) {
-	case NF_CT_FTP_PORT:
-	case NF_CT_FTP_PASV:
-		return snprintf(buffer, buflen, "%u,%u,%u,%u,%u,%u",
-				((unsigned char *)&addr)[0],
-				((unsigned char *)&addr)[1],
-				((unsigned char *)&addr)[2],
-				((unsigned char *)&addr)[3],
-				port >> 8,
-				port & 0xFF);
-	case NF_CT_FTP_EPRT:
-		return snprintf(buffer, buflen, "|1|%pI4|%u|", &addr, port);
-	case NF_CT_FTP_EPSV:
-		return snprintf(buffer, buflen, "|||%u|", port);
-	}
-
-	return 0;
-}
-
-/* So, this packet has hit the connection tracking matching code.
-   Mangle it, and change the expectation to match the new version. */
-static unsigned int nf_nat_ftp(struct sk_buff *skb,
-			       enum ip_conntrack_info ctinfo,
-			       enum nf_ct_ftp_type type,
-			       unsigned int protoff,
-			       unsigned int matchoff,
-			       unsigned int matchlen,
-			       struct nf_conntrack_expect *exp)
-{
-	__be32 newip;
-	u_int16_t port;
-	int dir = CTINFO2DIR(ctinfo);
-	struct nf_conn *ct = exp->master;
-	char buffer[sizeof("|1|255.255.255.255|65535|")];
-	unsigned int buflen;
-
-	pr_debug("FTP_NAT: type %i, off %u len %u\n", type, matchoff, matchlen);
-
-	/* Connection will come from wherever this packet goes, hence !dir */
-	newip = ct->tuplehash[!dir].tuple.dst.u3.ip;
-	exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
-	exp->dir = !dir;
-
-	/* When you see the packet, we need to NAT it the same as the
-	 * this one. */
-	exp->expectfn = nf_nat_follow_master;
-
-	/* Try to get same port: if not, try to change it. */
-	for (port = ntohs(exp->saved_proto.tcp.port); port != 0; port++) {
-		int ret;
-
-		exp->tuple.dst.u.tcp.port = htons(port);
-		ret = nf_ct_expect_related(exp);
-		if (ret == 0)
-			break;
-		else if (ret != -EBUSY) {
-			port = 0;
-			break;
-		}
-	}
-
-	if (port == 0)
-		return NF_DROP;
-
-	buflen = nf_nat_ftp_fmt_cmd(type, buffer, sizeof(buffer), newip, port);
-	if (!buflen)
-		goto out;
-
-	pr_debug("calling nf_nat_mangle_tcp_packet\n");
-
-	if (!nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff, matchoff,
-				      matchlen, buffer, buflen))
-		goto out;
-
-	return NF_ACCEPT;
-
-out:
-	nf_ct_unexpect_related(exp);
-	return NF_DROP;
-}
-
-static void __exit nf_nat_ftp_fini(void)
-{
-	RCU_INIT_POINTER(nf_nat_ftp_hook, NULL);
-	synchronize_rcu();
-}
-
-static int __init nf_nat_ftp_init(void)
-{
-	BUG_ON(nf_nat_ftp_hook != NULL);
-	RCU_INIT_POINTER(nf_nat_ftp_hook, nf_nat_ftp);
-	return 0;
-}
-
-/* Prior to 2.6.11, we had a ports param.  No longer, but don't break users. */
-static int warn_set(const char *val, struct kernel_param *kp)
-{
-	printk(KERN_INFO KBUILD_MODNAME
-	       ": kernel >= 2.6.10 only uses 'ports' for conntrack modules\n");
-	return 0;
-}
-module_param_call(ports, warn_set, NULL, NULL, 0);
-
-module_init(nf_nat_ftp_init);
-module_exit(nf_nat_ftp_fini);