Release 4.8 net/netfilter/nf_nat_proto_udp.c
/* (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/udp.h>
#include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_l4proto.h>
static u16 udp_port_rover;
static void
udp_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,
&udp_port_rover);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jozsef kadlecsik | jozsef kadlecsik | 30 | 61.22% | 1 | 25.00% |
| patrick mchardy | patrick mchardy | 17 | 34.69% | 2 | 50.00% |
| changli gao | changli gao | 2 | 4.08% | 1 | 25.00% |
| Total | 49 | 100.00% | 4 | 100.00% |
static bool
udp_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 udphdr *hdr;
__be16 *portptr, newport;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct udphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src port */
newport = tuple->src.u.udp.port;
portptr = &hdr->source;
} else {
/* Get rid of dst port */
newport = tuple->dst.u.udp.port;
portptr = &hdr->dest;
}
if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) {
l3proto->csum_update(skb, iphdroff, &hdr->check,
tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
false);
if (!hdr->check)
hdr->check = CSUM_MANGLED_0;
}
*portptr = newport;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jozsef kadlecsik | jozsef kadlecsik | 169 | 84.08% | 1 | 14.29% |
| patrick mchardy | patrick mchardy | 23 | 11.44% | 3 | 42.86% |
| herbert xu | herbert xu | 5 | 2.49% | 1 | 14.29% |
| jan engelhardt | jan engelhardt | 3 | 1.49% | 1 | 14.29% |
| tom herbert | tom herbert | 1 | 0.50% | 1 | 14.29% |
| Total | 201 | 100.00% | 7 | 100.00% |
const struct nf_nat_l4proto nf_nat_l4proto_udp = {
.l4proto = IPPROTO_UDP,
.manip_pkt = udp_manip_pkt,
.in_range = nf_nat_l4proto_in_range,
.unique_tuple = udp_unique_tuple,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
.nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jozsef kadlecsik | jozsef kadlecsik | 256 | 79.26% | 1 | 7.14% |
| patrick mchardy | patrick mchardy | 52 | 16.10% | 7 | 50.00% |
| herbert xu | herbert xu | 5 | 1.55% | 1 | 7.14% |
| jan engelhardt | jan engelhardt | 3 | 0.93% | 1 | 7.14% |
| paul gortmaker | paul gortmaker | 3 | 0.93% | 1 | 7.14% |
| changli gao | changli gao | 2 | 0.62% | 1 | 7.14% |
| tom herbert | tom herbert | 1 | 0.31% | 1 | 7.14% |
| duan jiong | duan jiong | 1 | 0.31% | 1 | 7.14% |
| Total | 323 | 100.00% | 14 | 100.00% |
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