Release 4.11 net/netfilter/xt_connlabel.c
/*
* (C) 2013 Astaro GmbH & Co KG
*
* 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/module.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_labels.h>
#include <linux/netfilter/x_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Florian Westphal <fw@strlen.de>");
MODULE_DESCRIPTION("Xtables: add/match connection trackling labels");
MODULE_ALIAS("ipt_connlabel");
MODULE_ALIAS("ip6t_connlabel");
static bool
connlabel_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_connlabel_mtinfo *info = par->matchinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn_labels *labels;
struct nf_conn *ct;
bool invert = info->options & XT_CONNLABEL_OP_INVERT;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL || nf_ct_is_untracked(ct))
return invert;
labels = nf_ct_labels_find(ct);
if (!labels)
return invert;
if (test_bit(info->bit, labels->bits))
return !invert;
if (info->options & XT_CONNLABEL_OP_SET) {
if (!test_and_set_bit(info->bit, labels->bits))
nf_conntrack_event_cache(IPCT_LABEL, ct);
return !invert;
}
return invert;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 144 | 100.00% | 2 | 100.00% |
| Total | 144 | 100.00% | 2 | 100.00% |
static int connlabel_mt_check(const struct xt_mtchk_param *par)
{
const int options = XT_CONNLABEL_OP_INVERT |
XT_CONNLABEL_OP_SET;
struct xt_connlabel_mtinfo *info = par->matchinfo;
int ret;
if (info->options & ~options) {
pr_err("Unknown options in mask %x\n", info->options);
return -EINVAL;
}
ret = nf_ct_netns_get(par->net, par->family);
if (ret < 0) {
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
return ret;
}
ret = nf_connlabels_get(par->net, info->bit);
if (ret < 0)
nf_ct_netns_put(par->net, par->family);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 111 | 90.98% | 2 | 66.67% |
| Joe Stringer | 11 | 9.02% | 1 | 33.33% |
| Total | 122 | 100.00% | 3 | 100.00% |
static void connlabel_mt_destroy(const struct xt_mtdtor_param *par)
{
nf_connlabels_put(par->net);
nf_ct_netns_put(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 27 | 90.00% | 2 | 66.67% |
| Joe Stringer | 3 | 10.00% | 1 | 33.33% |
| Total | 30 | 100.00% | 3 | 100.00% |
static struct xt_match connlabels_mt_reg __read_mostly = {
.name = "connlabel",
.family = NFPROTO_UNSPEC,
.checkentry = connlabel_mt_check,
.match = connlabel_mt,
.matchsize = sizeof(struct xt_connlabel_mtinfo),
.destroy = connlabel_mt_destroy,
.me = THIS_MODULE,
};
static int __init connlabel_mt_init(void)
{
return xt_register_match(&connlabels_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static void __exit connlabel_mt_exit(void)
{
xt_unregister_match(&connlabels_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
module_init(connlabel_mt_init);
module_exit(connlabel_mt_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 414 | 96.73% | 3 | 75.00% |
| Joe Stringer | 14 | 3.27% | 1 | 25.00% |
| Total | 428 | 100.00% | 4 | 100.00% |
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