diff options
author | Patrick McHardy <kaber@trash.net> | 2012-08-26 17:14:06 (GMT) |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-30 01:00:14 (GMT) |
commit | c7232c9979cba684c50b64c513c4a83c9aa70563 (patch) | |
tree | dbe0fdac62191d85935f5a3dfe815c1b1add60f9 /net/ipv4/netfilter/nf_nat_proto_udp.c | |
parent | 051966c0c644a1c96092d4206e00704ade813c9a (diff) | |
download | linux-fsl-qoriq-c7232c9979cba684c50b64c513c4a83c9aa70563.tar.xz |
netfilter: add protocol independent NAT core
Convert the IPv4 NAT implementation to a protocol independent core and
address family specific modules.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/netfilter/nf_nat_proto_udp.c')
-rw-r--r-- | net/ipv4/netfilter/nf_nat_proto_udp.c | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/net/ipv4/netfilter/nf_nat_proto_udp.c b/net/ipv4/netfilter/nf_nat_proto_udp.c deleted file mode 100644 index 9883336..0000000 --- a/net/ipv4/netfilter/nf_nat_proto_udp.c +++ /dev/null @@ -1,82 +0,0 @@ -/* (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/types.h> -#include <linux/export.h> -#include <linux/init.h> -#include <linux/ip.h> -#include <linux/udp.h> - -#include <linux/netfilter.h> -#include <net/netfilter/nf_nat.h> -#include <net/netfilter/nf_nat_core.h> -#include <net/netfilter/nf_nat_rule.h> -#include <net/netfilter/nf_nat_protocol.h> - -static u_int16_t udp_port_rover; - -static void -udp_unique_tuple(struct nf_conntrack_tuple *tuple, - const struct nf_nat_ipv4_range *range, - enum nf_nat_manip_type maniptype, - const struct nf_conn *ct) -{ - nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, &udp_port_rover); -} - -static bool -udp_manip_pkt(struct sk_buff *skb, - unsigned int iphdroff, - const struct nf_conntrack_tuple *tuple, - enum nf_nat_manip_type maniptype) -{ - const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff); - struct udphdr *hdr; - unsigned int hdroff = iphdroff + iph->ihl*4; - __be32 oldip, newip; - __be16 *portptr, newport; - - if (!skb_make_writable(skb, hdroff + sizeof(*hdr))) - return false; - - iph = (struct iphdr *)(skb->data + iphdroff); - hdr = (struct udphdr *)(skb->data + hdroff); - - if (maniptype == NF_NAT_MANIP_SRC) { - /* Get rid of src ip and src pt */ - oldip = iph->saddr; - newip = tuple->src.u3.ip; - newport = tuple->src.u.udp.port; - portptr = &hdr->source; - } else { - /* Get rid of dst ip and dst pt */ - oldip = iph->daddr; - newip = tuple->dst.u3.ip; - newport = tuple->dst.u.udp.port; - portptr = &hdr->dest; - } - if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) { - inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1); - inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, - 0); - if (!hdr->check) - hdr->check = CSUM_MANGLED_0; - } - *portptr = newport; - return true; -} - -const struct nf_nat_protocol nf_nat_protocol_udp = { - .protonum = IPPROTO_UDP, - .manip_pkt = udp_manip_pkt, - .in_range = nf_nat_proto_in_range, - .unique_tuple = udp_unique_tuple, -#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) - .nlattr_to_range = nf_nat_proto_nlattr_to_range, -#endif -}; |