Release 4.8 net/netfilter/nf_nat_proto_dccp.c
/*
* DCCP NAT protocol helper
*
* Copyright (c) 2005, 2006, 2008 Patrick McHardy <kaber@trash.net>
*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/dccp.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t dccp_port_rover;
static void
dccp_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&dccp_port_rover);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 47 | 95.92% | 2 | 66.67% |
| changli gao | changli gao | 2 | 4.08% | 1 | 33.33% |
| Total | 49 | 100.00% | 3 | 100.00% |
static bool
dccp_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)
{
struct dccp_hdr *hdr;
__be16 *portptr, oldport, newport;
int hdrsize = 8; /* DCCP connection tracking guarantees this much */
if (skb->len >= hdroff + sizeof(struct dccp_hdr))
hdrsize = sizeof(struct dccp_hdr);
if (!skb_make_writable(skb, hdroff + hdrsize))
return false;
hdr = (struct dccp_hdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
newport = tuple->src.u.dccp.port;
portptr = &hdr->dccph_sport;
} else {
newport = tuple->dst.u.dccp.port;
portptr = &hdr->dccph_dport;
}
oldport = *portptr;
*portptr = newport;
if (hdrsize < sizeof(*hdr))
return true;
l3proto->csum_update(skb, iphdroff, &hdr->dccph_checksum,
tuple, maniptype);
inet_proto_csum_replace2(&hdr->dccph_checksum, skb, oldport, newport,
false);
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 210 | 97.67% | 3 | 60.00% |
| jan engelhardt | jan engelhardt | 4 | 1.86% | 1 | 20.00% |
| tom herbert | tom herbert | 1 | 0.47% | 1 | 20.00% |
| Total | 215 | 100.00% | 5 | 100.00% |
static const struct nf_nat_l4proto nf_nat_l4proto_dccp = {
.l4proto = IPPROTO_DCCP,
.manip_pkt = dccp_manip_pkt,
.in_range = nf_nat_l4proto_in_range,
.unique_tuple = dccp_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_dccp_init(void)
{
int err;
err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
if (err < 0)
goto err1;
err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
if (err < 0)
goto err2;
return 0;
err2:
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
err1:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 68 | 100.00% | 2 | 100.00% |
| Total | 68 | 100.00% | 2 | 100.00% |
static void __exit nf_nat_proto_dccp_fini(void)
{
nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 25 | 100.00% | 2 | 100.00% |
| Total | 25 | 100.00% | 2 | 100.00% |
module_init(nf_nat_proto_dccp_init);
module_exit(nf_nat_proto_dccp_fini);
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("DCCP NAT protocol helper");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 448 | 98.25% | 3 | 42.86% |
| jan engelhardt | jan engelhardt | 4 | 0.88% | 1 | 14.29% |
| changli gao | changli gao | 2 | 0.44% | 1 | 14.29% |
| tom herbert | tom herbert | 1 | 0.22% | 1 | 14.29% |
| duan jiong | duan jiong | 1 | 0.22% | 1 | 14.29% |
| Total | 456 | 100.00% | 7 | 100.00% |
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