netfilter: nf_nat: support IPv6 in IRC NAT helper

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>

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_IRC
-	tristate
-	depends on NF_CONNTRACK && NF_NAT_IPV4
-	default NF_NAT_IPV4 && NF_CONNTRACK_IRC
-
 config NF_NAT_TFTP
 	tristate
 	depends on NF_CONNTRACK && NF_NAT_IPV4

net/ipv4/netfilter/Makefile

@@ -21,7 +21,6 @@ obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
 
 # NAT helpers (nf_conntrack)
 obj-$(CONFIG_NF_NAT_H323) += nf_nat_h323.o
-obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o
 obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o
 obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o
 obj-$(CONFIG_NF_NAT_TFTP) += nf_nat_tftp.o

net/netfilter/Kconfig

@@ -390,6 +390,11 @@ config NF_NAT_FTP
 	depends on NF_CONNTRACK && NF_NAT
 	default NF_NAT && NF_CONNTRACK_FTP
 
+config NF_NAT_IRC
+	tristate
+	depends on NF_CONNTRACK && NF_NAT
+	default NF_NAT && NF_CONNTRACK_IRC
+
 config NF_NAT_SIP
 	tristate
 	depends on NF_CONNTRACK && NF_NAT

net/netfilter/Makefile

@@ -57,6 +57,7 @@ obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
 # NAT helpers
 obj-$(CONFIG_NF_NAT_AMANDA) += nf_nat_amanda.o
 obj-$(CONFIG_NF_NAT_FTP) += nf_nat_ftp.o
+obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o
 obj-$(CONFIG_NF_NAT_SIP) += nf_nat_sip.o
 
 # transparent proxy support

net/netfilter/nf_conntrack_irc.c

@@ -205,8 +205,7 @@ static int help(struct sk_buff *skb, unsigned int protoff,
 					  IPPROTO_TCP, NULL, &port);
 
 			nf_nat_irc = rcu_dereference(nf_nat_irc_hook);
-			if (nf_nat_irc && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
-			    ct->status & IPS_NAT_MASK)
+			if (nf_nat_irc && ct->status & IPS_NAT_MASK)
 				ret = nf_nat_irc(skb, ctinfo, protoff,
 						 addr_beg_p - ib_ptr,
 						 addr_end_p - addr_beg_p,

net/ipv4/netfilter/nf_nat_irc.c → net/netfilter/nf_nat_irc.c

@@ -34,7 +34,6 @@ static unsigned int help(struct sk_buff *skb,
 			 struct nf_conntrack_expect *exp)
 {
 	char buffer[sizeof("4294967296 65635")];
-	u_int32_t ip;
 	u_int16_t port;
 	unsigned int ret;
 
@@ -60,11 +59,6 @@ static unsigned int help(struct sk_buff *skb,
 	if (port == 0)
 		return NF_DROP;
 
-	ip = ntohl(exp->master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip);
-	sprintf(buffer, "%u %u", ip, port);
-	pr_debug("nf_nat_irc: inserting '%s' == %pI4, port %u\n",
-		 buffer, &ip, port);
-
 	ret = nf_nat_mangle_tcp_packet(skb, exp->master, ctinfo,
 				       protoff, matchoff, matchlen, buffer,
 				       strlen(buffer));