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Release 4.14 net/netfilter/nf_conntrack_netbios_ns.c

Directory: net/netfilter
/*
 *      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

PersonTokensPropCommitsCommitProp
Patrick McHardy2873.68%125.00%
Jiri Olsa718.42%125.00%
Herbert Xu25.26%125.00%
Eric Dumazet12.63%125.00%
Total38100.00%4100.00%

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) { NF_CT_HELPER_BUILD_BUG_ON(0); exp_policy.timeout = timeout; return nf_conntrack_helper_register(&helper); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy2281.48%266.67%
Florian Westphal518.52%133.33%
Total27100.00%3100.00%


static void __exit nf_conntrack_netbios_ns_fini(void) { nf_conntrack_helper_unregister(&helper); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy15100.00%1100.00%
Total15100.00%1100.00%

module_init(nf_conntrack_netbios_ns_init); module_exit(nf_conntrack_netbios_ns_fini);

Overall Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy20585.06%225.00%
Jiri Olsa229.13%112.50%
Florian Westphal52.07%112.50%
Pablo Neira Ayuso52.07%112.50%
Herbert Xu20.83%112.50%
Eric Dumazet10.41%112.50%
Harvey Harrison10.41%112.50%
Total241100.00%8100.00%
Directory: net/netfilter
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