Release 4.18 net/netfilter/xt_connmark.c
/*
* xt_connmark - Netfilter module to operate on connection marks
*
* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
* by Henrik Nordstrom <hno@marasystems.com>
* Copyright © CC Computer Consultants GmbH, 2007 - 2008
* Jan Engelhardt <jengelh@medozas.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_connmark.h>
MODULE_AUTHOR("Henrik Nordstrom <hno@marasystems.com>");
MODULE_DESCRIPTION("Xtables: connection mark operations");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_CONNMARK");
MODULE_ALIAS("ip6t_CONNMARK");
MODULE_ALIAS("ipt_connmark");
MODULE_ALIAS("ip6t_connmark");
static unsigned int
connmark_tg_shift(struct sk_buff *skb, const struct xt_connmark_tginfo2 *info)
{
enum ip_conntrack_info ctinfo;
u_int32_t new_targetmark;
struct nf_conn *ct;
u_int32_t newmark;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL)
return XT_CONTINUE;
switch (info->mode) {
case XT_CONNMARK_SET:
newmark = (ct->mark & ~info->ctmask) ^ info->ctmark;
if (info->shift_dir == D_SHIFT_RIGHT)
newmark >>= info->shift_bits;
else
newmark <<= info->shift_bits;
if (ct->mark != newmark) {
ct->mark = newmark;
nf_conntrack_event_cache(IPCT_MARK, ct);
}
break;
case XT_CONNMARK_SAVE:
new_targetmark = (skb->mark & info->nfmask);
if (info->shift_dir == D_SHIFT_RIGHT)
new_targetmark >>= info->shift_bits;
else
new_targetmark <<= info->shift_bits;
newmark = (ct->mark & ~info->ctmask) ^
new_targetmark;
if (ct->mark != newmark) {
ct->mark = newmark;
nf_conntrack_event_cache(IPCT_MARK, ct);
}
break;
case XT_CONNMARK_RESTORE:
new_targetmark = (ct->mark & info->ctmask);
if (info->shift_dir == D_SHIFT_RIGHT)
new_targetmark >>= info->shift_bits;
else
new_targetmark <<= info->shift_bits;
newmark = (skb->mark & ~info->nfmask) ^
new_targetmark;
skb->mark = newmark;
break;
}
return XT_CONTINUE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 158 | 60.54% | 1 | 20.00% |
| Jack Ma | 83 | 31.80% | 2 | 40.00% |
| Pablo Neira Ayuso | 19 | 7.28% | 1 | 20.00% |
| Harald Welte | 1 | 0.38% | 1 | 20.00% |
| Total | 261 | 100.00% | 5 | 100.00% |
static unsigned int
connmark_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct xt_connmark_tginfo1 *info = par->targinfo;
const struct xt_connmark_tginfo2 info2 = {
.ctmark = info->ctmark,
.ctmask = info->ctmask,
.nfmask = info->nfmask,
.mode = info->mode,
};
return connmark_tg_shift(skb, &info2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 37 | 51.39% | 1 | 50.00% |
| Jack Ma | 35 | 48.61% | 1 | 50.00% |
| Total | 72 | 100.00% | 2 | 100.00% |
static unsigned int
connmark_tg_v2(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct xt_connmark_tginfo2 *info = par->targinfo;
return connmark_tg_shift(skb, info);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jack Ma | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
static int connmark_tg_check(const struct xt_tgchk_param *par)
{
int ret;
ret = nf_ct_netns_get(par->net, par->family);
if (ret < 0)
pr_info_ratelimited("cannot load conntrack support for proto=%u\n",
par->family);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 40 | 86.96% | 4 | 66.67% |
| Florian Westphal | 6 | 13.04% | 2 | 33.33% |
| Total | 46 | 100.00% | 6 | 100.00% |
static void connmark_tg_destroy(const struct xt_tgdtor_param *par)
{
nf_ct_netns_put(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 18 | 78.26% | 1 | 50.00% |
| Florian Westphal | 5 | 21.74% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
static bool
connmark_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_connmark_mtinfo1 *info = par->matchinfo;
enum ip_conntrack_info ctinfo;
const struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL)
return false;
return ((ct->mark & info->mask) == info->mark) ^ info->invert;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 64 | 83.12% | 6 | 85.71% |
| Harald Welte | 13 | 16.88% | 1 | 14.29% |
| Total | 77 | 100.00% | 7 | 100.00% |
static int connmark_mt_check(const struct xt_mtchk_param *par)
{
int ret;
ret = nf_ct_netns_get(par->net, par->family);
if (ret < 0)
pr_info_ratelimited("cannot load conntrack support for proto=%u\n",
par->family);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 39 | 84.78% | 5 | 62.50% |
| Florian Westphal | 6 | 13.04% | 2 | 25.00% |
| Pablo Neira Ayuso | 1 | 2.17% | 1 | 12.50% |
| Total | 46 | 100.00% | 8 | 100.00% |
static void connmark_mt_destroy(const struct xt_mtdtor_param *par)
{
nf_ct_netns_put(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 12 | 52.17% | 1 | 20.00% |
| Jan Engelhardt | 6 | 26.09% | 3 | 60.00% |
| Florian Westphal | 5 | 21.74% | 1 | 20.00% |
| Total | 23 | 100.00% | 5 | 100.00% |
static struct xt_target connmark_tg_reg[] __read_mostly = {
{
.name = "CONNMARK",
.revision = 1,
.family = NFPROTO_UNSPEC,
.checkentry = connmark_tg_check,
.target = connmark_tg,
.targetsize = sizeof(struct xt_connmark_tginfo1),
.destroy = connmark_tg_destroy,
.me = THIS_MODULE,
},
{
.name = "CONNMARK",
.revision = 2,
.family = NFPROTO_UNSPEC,
.checkentry = connmark_tg_check,
.target = connmark_tg_v2,
.targetsize = sizeof(struct xt_connmark_tginfo2),
.destroy = connmark_tg_destroy,
.me = THIS_MODULE,
}
};
static struct xt_match connmark_mt_reg __read_mostly = {
.name = "connmark",
.revision = 1,
.family = NFPROTO_UNSPEC,
.checkentry = connmark_mt_check,
.match = connmark_mt,
.matchsize = sizeof(struct xt_connmark_mtinfo1),
.destroy = connmark_mt_destroy,
.me = THIS_MODULE,
};
static int __init connmark_mt_init(void)
{
int ret;
ret = xt_register_targets(connmark_tg_reg,
ARRAY_SIZE(connmark_tg_reg));
if (ret < 0)
return ret;
ret = xt_register_match(&connmark_mt_reg);
if (ret < 0) {
xt_unregister_targets(connmark_tg_reg,
ARRAY_SIZE(connmark_tg_reg));
return ret;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 41 | 63.08% | 3 | 50.00% |
| Jack Ma | 12 | 18.46% | 1 | 16.67% |
| Harald Welte | 11 | 16.92% | 1 | 16.67% |
| Patrick McHardy | 1 | 1.54% | 1 | 16.67% |
| Total | 65 | 100.00% | 6 | 100.00% |
static void __exit connmark_mt_exit(void)
{
xt_unregister_match(&connmark_mt_reg);
xt_unregister_targets(connmark_tg_reg, ARRAY_SIZE(connmark_tg_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Harald Welte | 10 | 40.00% | 2 | 28.57% |
| Jan Engelhardt | 8 | 32.00% | 3 | 42.86% |
| Florian Westphal | 6 | 24.00% | 1 | 14.29% |
| Patrick McHardy | 1 | 4.00% | 1 | 14.29% |
| Total | 25 | 100.00% | 7 | 100.00% |
module_init(connmark_mt_init);
module_exit(connmark_mt_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 490 | 54.99% | 15 | 51.72% |
| Jack Ma | 216 | 24.24% | 2 | 6.90% |
| Harald Welte | 73 | 8.19% | 2 | 6.90% |
| Pablo Neira Ayuso | 69 | 7.74% | 2 | 6.90% |
| Florian Westphal | 28 | 3.14% | 3 | 10.34% |
| Patrick McHardy | 13 | 1.46% | 3 | 10.34% |
| Jeff Kirsher | 1 | 0.11% | 1 | 3.45% |
| Robert P. J. Day | 1 | 0.11% | 1 | 3.45% |
| Total | 891 | 100.00% | 29 | 100.00% |
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