Blame view
net/netfilter/nf_conntrack_netbios_ns.c
2.2 KB
92703eee4 [NETFILTER]: nf_c... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
/* * 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> |
92703eee4 [NETFILTER]: nf_c... |
21 |
#include <linux/in.h> |
92703eee4 [NETFILTER]: nf_c... |
22 23 24 25 26 27 28 29 30 31 32 |
#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"); |
4dc06f963 netfilter: nf_con... |
33 |
MODULE_ALIAS_NFCT_HELPER("netbios_ns"); |
92703eee4 [NETFILTER]: nf_c... |
34 35 |
static unsigned int timeout __read_mostly = 3; |
93557f53e netfilter: nf_con... |
36 |
module_param(timeout, uint, S_IRUSR); |
92703eee4 [NETFILTER]: nf_c... |
37 |
MODULE_PARM_DESC(timeout, "timeout for master connection/replies in seconds"); |
6002f266b [NETFILTER]: nf_c... |
38 39 40 |
static struct nf_conntrack_expect_policy exp_policy = { .max_expected = 1, }; |
93557f53e netfilter: nf_con... |
41 42 43 44 45 |
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); } |
92703eee4 [NETFILTER]: nf_c... |
46 47 |
static struct nf_conntrack_helper helper __read_mostly = { .name = "netbios-ns", |
93557f53e netfilter: nf_con... |
48 |
.tuple.src.l3num = NFPROTO_IPV4, |
09640e636 net: replace uses... |
49 |
.tuple.src.u.udp.port = cpu_to_be16(NMBD_PORT), |
92703eee4 [NETFILTER]: nf_c... |
50 |
.tuple.dst.protonum = IPPROTO_UDP, |
92703eee4 [NETFILTER]: nf_c... |
51 |
.me = THIS_MODULE, |
93557f53e netfilter: nf_con... |
52 |
.help = netbios_ns_help, |
6002f266b [NETFILTER]: nf_c... |
53 |
.expect_policy = &exp_policy, |
92703eee4 [NETFILTER]: nf_c... |
54 55 56 57 |
}; static int __init nf_conntrack_netbios_ns_init(void) { |
6002f266b [NETFILTER]: nf_c... |
58 |
exp_policy.timeout = timeout; |
92703eee4 [NETFILTER]: nf_c... |
59 60 61 62 63 64 65 66 67 68 |
return nf_conntrack_helper_register(&helper); } static void __exit nf_conntrack_netbios_ns_fini(void) { nf_conntrack_helper_unregister(&helper); } module_init(nf_conntrack_netbios_ns_init); module_exit(nf_conntrack_netbios_ns_fini); |