diff options
Diffstat (limited to 'net/ipv4/netfilter/ip_conntrack_netbios_ns.c')
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_netbios_ns.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_netbios_ns.c b/net/ipv4/netfilter/ip_conntrack_netbios_ns.c deleted file mode 100644 index cc6dd49c9da0..000000000000 --- a/net/ipv4/netfilter/ip_conntrack_netbios_ns.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * 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/skbuff.h> -#include <linux/netdevice.h> -#include <linux/inetdevice.h> -#include <linux/if_addr.h> -#include <linux/in.h> -#include <linux/ip.h> -#include <net/route.h> - -#include <linux/netfilter.h> -#include <linux/netfilter_ipv4.h> -#include <linux/netfilter_ipv4/ip_conntrack.h> -#include <linux/netfilter_ipv4/ip_conntrack_helper.h> - -#define NMBD_PORT 137 - -MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); -MODULE_DESCRIPTION("NetBIOS name service broadcast connection tracking helper"); -MODULE_LICENSE("GPL"); - -static unsigned int timeout = 3; -module_param(timeout, uint, 0400); -MODULE_PARM_DESC(timeout, "timeout for master connection/replies in seconds"); - -static int help(struct sk_buff **pskb, - struct ip_conntrack *ct, enum ip_conntrack_info ctinfo) -{ - struct ip_conntrack_expect *exp; - struct iphdr *iph = (*pskb)->nh.iph; - struct rtable *rt = (struct rtable *)(*pskb)->dst; - struct in_device *in_dev; - __be32 mask = 0; - - /* we're only interested in locally generated packets */ - if ((*pskb)->sk == NULL) - goto out; - if (rt == NULL || !(rt->rt_flags & RTCF_BROADCAST)) - goto out; - if (CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) - goto out; - - rcu_read_lock(); - in_dev = __in_dev_get_rcu(rt->u.dst.dev); - if (in_dev != NULL) { - for_primary_ifa(in_dev) { - if (ifa->ifa_broadcast == iph->daddr) { - mask = ifa->ifa_mask; - break; - } - } endfor_ifa(in_dev); - } - rcu_read_unlock(); - - if (mask == 0) - goto out; - - exp = ip_conntrack_expect_alloc(ct); - if (exp == NULL) - goto out; - - exp->tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple; - exp->tuple.src.u.udp.port = htons(NMBD_PORT); - - exp->mask.src.ip = mask; - exp->mask.src.u.udp.port = htons(0xFFFF); - exp->mask.dst.ip = htonl(0xFFFFFFFF); - exp->mask.dst.u.udp.port = htons(0xFFFF); - exp->mask.dst.protonum = 0xFF; - - exp->expectfn = NULL; - exp->flags = IP_CT_EXPECT_PERMANENT; - - ip_conntrack_expect_related(exp); - ip_conntrack_expect_put(exp); - - ip_ct_refresh(ct, *pskb, timeout * HZ); -out: - return NF_ACCEPT; -} - -static struct ip_conntrack_helper helper = { - .name = "netbios-ns", - .tuple = { - .src = { - .u = { - .udp = { - .port = __constant_htons(NMBD_PORT), - } - } - }, - .dst = { - .protonum = IPPROTO_UDP, - }, - }, - .mask = { - .src = { - .u = { - .udp = { - .port = __constant_htons(0xFFFF), - } - } - }, - .dst = { - .protonum = 0xFF, - }, - }, - .max_expected = 1, - .me = THIS_MODULE, - .help = help, -}; - -static int __init ip_conntrack_netbios_ns_init(void) -{ - helper.timeout = timeout; - return ip_conntrack_helper_register(&helper); -} - -static void __exit ip_conntrack_netbios_ns_fini(void) -{ - ip_conntrack_helper_unregister(&helper); -} - -module_init(ip_conntrack_netbios_ns_init); -module_exit(ip_conntrack_netbios_ns_fini); |