Release 4.8 net/ipv6/netfilter/nf_nat_proto_icmpv6.c
/*
* Copyright (c) 2011 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.
*
* Based on Rusty Russell's IPv4 ICMP NAT code. Development of IPv6
* NAT funded by Astaro.
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/icmpv6.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 bool
icmpv6_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype,
const union nf_conntrack_man_proto *min,
const union nf_conntrack_man_proto *max)
{
return ntohs(tuple->src.u.icmp.id) >= ntohs(min->icmp.id) &&
ntohs(tuple->src.u.icmp.id) <= ntohs(max->icmp.id);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 73 | 100.00% | 1 | 100.00% |
| Total | 73 | 100.00% | 1 | 100.00% |
static void
icmpv6_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)
{
static u16 id;
unsigned int range_size;
unsigned int i;
range_size = ntohs(range->max_proto.icmp.id) -
ntohs(range->min_proto.icmp.id) + 1;
if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED))
range_size = 0xffff;
for (i = 0; ; ++id) {
tuple->src.u.icmp.id = htons(ntohs(range->min_proto.icmp.id) +
(id % range_size));
if (++i == range_size || !nf_nat_used_tuple(tuple, ct))
return;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 144 | 100.00% | 1 | 100.00% |
| Total | 144 | 100.00% | 1 | 100.00% |
static bool
icmpv6_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 icmp6hdr *hdr;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct icmp6hdr *)(skb->data + hdroff);
l3proto->csum_update(skb, iphdroff, &hdr->icmp6_cksum,
tuple, maniptype);
if (hdr->icmp6_type == ICMPV6_ECHO_REQUEST ||
hdr->icmp6_type == ICMPV6_ECHO_REPLY) {
inet_proto_csum_replace2(&hdr->icmp6_cksum, skb,
hdr->icmp6_identifier,
tuple->src.u.icmp.id, false);
hdr->icmp6_identifier = tuple->src.u.icmp.id;
}
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 148 | 98.01% | 1 | 33.33% |
| phil oester | phil oester | 2 | 1.32% | 1 | 33.33% |
| tom herbert | tom herbert | 1 | 0.66% | 1 | 33.33% |
| Total | 151 | 100.00% | 3 | 100.00% |
const struct nf_nat_l4proto nf_nat_l4proto_icmpv6 = {
.l4proto = IPPROTO_ICMPV6,
.manip_pkt = icmpv6_manip_pkt,
.in_range = icmpv6_in_range,
.unique_tuple = icmpv6_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 |
| patrick mchardy | patrick mchardy | 430 | 99.08% | 1 | 25.00% |
| phil oester | phil oester | 2 | 0.46% | 1 | 25.00% |
| tom herbert | tom herbert | 1 | 0.23% | 1 | 25.00% |
| americo wang | americo wang | 1 | 0.23% | 1 | 25.00% |
| Total | 434 | 100.00% | 4 | 100.00% |
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