Release 4.11 net/netfilter/nf_conntrack_netbios_ns.c
/*
* NetBIOS name service broadcast connection tracking helper
*
* (c) 2005 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
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
/*
* This helper tracks locally originating NetBIOS name service
* requests by issuing permanent expectations (valid until
* timing out) matching all reply connections from the
* destination network. The only NetBIOS specific thing is
* actually the port number.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/in.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#define NMBD_PORT 137
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("NetBIOS name service broadcast connection tracking helper");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ip_conntrack_netbios_ns");
MODULE_ALIAS_NFCT_HELPER("netbios_ns");
static unsigned int timeout __read_mostly = 3;
module_param(timeout, uint, S_IRUSR);
MODULE_PARM_DESC(timeout, "timeout for master connection/replies in seconds");
static struct nf_conntrack_expect_policy exp_policy = {
.max_expected = 1,
};
static int netbios_ns_help(struct sk_buff *skb, unsigned int protoff,
struct nf_conn *ct, enum ip_conntrack_info ctinfo)
{
return nf_conntrack_broadcast_help(skb, protoff, ct, ctinfo, timeout);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 28 | 73.68% | 1 | 25.00% |
| Jiri Olsa | 7 | 18.42% | 1 | 25.00% |
| Herbert Xu | 2 | 5.26% | 1 | 25.00% |
| Eric Dumazet | 1 | 2.63% | 1 | 25.00% |
| Total | 38 | 100.00% | 4 | 100.00% |
static struct nf_conntrack_helper helper __read_mostly = {
.name = "netbios-ns",
.tuple.src.l3num = NFPROTO_IPV4,
.tuple.src.u.udp.port = cpu_to_be16(NMBD_PORT),
.tuple.dst.protonum = IPPROTO_UDP,
.me = THIS_MODULE,
.help = netbios_ns_help,
.expect_policy = &exp_policy,
};
static int __init nf_conntrack_netbios_ns_init(void)
{
exp_policy.timeout = timeout;
return nf_conntrack_helper_register(&helper);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 22 | 100.00% | 2 | 100.00% |
| Total | 22 | 100.00% | 2 | 100.00% |
static void __exit nf_conntrack_netbios_ns_fini(void)
{
nf_conntrack_helper_unregister(&helper);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
module_init(nf_conntrack_netbios_ns_init);
module_exit(nf_conntrack_netbios_ns_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 205 | 86.86% | 2 | 28.57% |
| Jiri Olsa | 22 | 9.32% | 1 | 14.29% |
| Pablo Neira Ayuso | 5 | 2.12% | 1 | 14.29% |
| Herbert Xu | 2 | 0.85% | 1 | 14.29% |
| Eric Dumazet | 1 | 0.42% | 1 | 14.29% |
| Harvey Harrison | 1 | 0.42% | 1 | 14.29% |
| Total | 236 | 100.00% | 7 | 100.00% |
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