Release 4.11 net/netfilter/xt_iprange.c
/*
* xt_iprange - Netfilter module to match IP address ranges
*
* (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* (C) CC Computer Consultants GmbH, 2008
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_iprange.h>
static bool
iprange_mt4(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_iprange_mtinfo *info = par->matchinfo;
const struct iphdr *iph = ip_hdr(skb);
bool m;
if (info->flags & IPRANGE_SRC) {
m = ntohl(iph->saddr) < ntohl(info->src_min.ip);
m |= ntohl(iph->saddr) > ntohl(info->src_max.ip);
m ^= !!(info->flags & IPRANGE_SRC_INV);
if (m) {
pr_debug("src IP %pI4 NOT in range %s%pI4-%pI4\n",
&iph->saddr,
(info->flags & IPRANGE_SRC_INV) ? "(INV) " : "",
&info->src_min.ip,
&info->src_max.ip);
return false;
}
}
if (info->flags & IPRANGE_DST) {
m = ntohl(iph->daddr) < ntohl(info->dst_min.ip);
m |= ntohl(iph->daddr) > ntohl(info->dst_max.ip);
m ^= !!(info->flags & IPRANGE_DST_INV);
if (m) {
pr_debug("dst IP %pI4 NOT in range %s%pI4-%pI4\n",
&iph->daddr,
(info->flags & IPRANGE_DST_INV) ? "(INV) " : "",
&info->dst_min.ip,
&info->dst_max.ip);
return false;
}
}
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 219 | 87.60% | 3 | 37.50% |
Harald Welte | 12 | 4.80% | 1 | 12.50% |
Harvey Harrison | 8 | 3.20% | 1 | 12.50% |
Alexey Dobriyan | 8 | 3.20% | 1 | 12.50% |
Patrick McHardy | 2 | 0.80% | 1 | 12.50% |
Thomas Jacob | 1 | 0.40% | 1 | 12.50% |
Total | 250 | 100.00% | 8 | 100.00% |
static inline int
iprange_ipv6_lt(const struct in6_addr *a, const struct in6_addr *b)
{
unsigned int i;
for (i = 0; i < 4; ++i) {
if (a->s6_addr32[i] != b->s6_addr32[i])
return ntohl(a->s6_addr32[i]) < ntohl(b->s6_addr32[i]);
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 59 | 75.64% | 2 | 66.67% |
Thomas Jacob | 19 | 24.36% | 1 | 33.33% |
Total | 78 | 100.00% | 3 | 100.00% |
static bool
iprange_mt6(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_iprange_mtinfo *info = par->matchinfo;
const struct ipv6hdr *iph = ipv6_hdr(skb);
bool m;
if (info->flags & IPRANGE_SRC) {
m = iprange_ipv6_lt(&iph->saddr, &info->src_min.in6);
m |= iprange_ipv6_lt(&info->src_max.in6, &iph->saddr);
m ^= !!(info->flags & IPRANGE_SRC_INV);
if (m) {
pr_debug("src IP %pI6 NOT in range %s%pI6-%pI6\n",
&iph->saddr,
(info->flags & IPRANGE_SRC_INV) ? "(INV) " : "",
&info->src_min.in6,
&info->src_max.in6);
return false;
}
}
if (info->flags & IPRANGE_DST) {
m = iprange_ipv6_lt(&iph->daddr, &info->dst_min.in6);
m |= iprange_ipv6_lt(&info->dst_max.in6, &iph->daddr);
m ^= !!(info->flags & IPRANGE_DST_INV);
if (m) {
pr_debug("dst IP %pI6 NOT in range %s%pI6-%pI6\n",
&iph->daddr,
(info->flags & IPRANGE_DST_INV) ? "(INV) " : "",
&info->dst_min.in6,
&info->dst_max.in6);
return false;
}
}
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 148 | 60.16% | 3 | 50.00% |
Thomas Jacob | 90 | 36.59% | 2 | 33.33% |
Alexey Dobriyan | 8 | 3.25% | 1 | 16.67% |
Total | 246 | 100.00% | 6 | 100.00% |
static struct xt_match iprange_mt_reg[] __read_mostly = {
{
.name = "iprange",
.revision = 1,
.family = NFPROTO_IPV4,
.match = iprange_mt4,
.matchsize = sizeof(struct xt_iprange_mtinfo),
.me = THIS_MODULE,
},
{
.name = "iprange",
.revision = 1,
.family = NFPROTO_IPV6,
.match = iprange_mt6,
.matchsize = sizeof(struct xt_iprange_mtinfo),
.me = THIS_MODULE,
},
};
static int __init iprange_mt_init(void)
{
return xt_register_matches(iprange_mt_reg, ARRAY_SIZE(iprange_mt_reg));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 20 | 100.00% | 1 | 100.00% |
Total | 20 | 100.00% | 1 | 100.00% |
static void __exit iprange_mt_exit(void)
{
xt_unregister_matches(iprange_mt_reg, ARRAY_SIZE(iprange_mt_reg));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 16 | 84.21% | 1 | 50.00% |
Harald Welte | 3 | 15.79% | 1 | 50.00% |
Total | 19 | 100.00% | 2 | 100.00% |
module_init(iprange_mt_init);
module_exit(iprange_mt_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
MODULE_DESCRIPTION("Xtables: arbitrary IPv4 range matching");
MODULE_ALIAS("ipt_iprange");
MODULE_ALIAS("ip6t_iprange");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jan Engelhardt | 578 | 76.05% | 11 | 57.89% |
Thomas Jacob | 110 | 14.47% | 3 | 15.79% |
Harald Welte | 36 | 4.74% | 1 | 5.26% |
Alexey Dobriyan | 16 | 2.11% | 1 | 5.26% |
Phil Oester | 10 | 1.32% | 1 | 5.26% |
Harvey Harrison | 8 | 1.05% | 1 | 5.26% |
Patrick McHardy | 2 | 0.26% | 1 | 5.26% |
Total | 760 | 100.00% | 19 | 100.00% |
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