projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a536df35 PM |
1 | /* (C) 2001-2002 Magnus Boden <mb@ozaba.mine.nu> |
| 2 | * | |
| 3 | * This program is free software; you can redistribute it and/or modify | |
| 4 | * it under the terms of the GNU General Public License version 2 as | |
| 5 | * published by the Free Software Foundation. | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/module.h> | |
| a536df35 PM |
9 | #include <linux/udp.h> |
| 10 | ||
| 11 | #include <net/netfilter/nf_nat_helper.h> | |
| 12 | #include <net/netfilter/nf_nat_rule.h> | |
| 13 | #include <net/netfilter/nf_conntrack_helper.h> | |
| 14 | #include <net/netfilter/nf_conntrack_expect.h> | |
| 15 | #include <linux/netfilter/nf_conntrack_tftp.h> | |
| 16 | ||
| 17 | MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>"); | |
| 18 | MODULE_DESCRIPTION("TFTP NAT helper"); | |
| 19 | MODULE_LICENSE("GPL"); | |
| 20 | MODULE_ALIAS("ip_nat_tftp"); | |
| 21 | ||
| 3db05fea | 22 | static unsigned int help(struct sk_buff *skb, |
| a536df35 PM |
23 | enum ip_conntrack_info ctinfo, |
| 24 | struct nf_conntrack_expect *exp) | |
| 25 | { | |
| de24b4eb | 26 | const struct nf_conn *ct = exp->master; |
| a536df35 PM |
27 | |
| 28 | exp->saved_proto.udp.port | |
| 29 | = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.udp.port; | |
| 30 | exp->dir = IP_CT_DIR_REPLY; | |
| 31 | exp->expectfn = nf_nat_follow_master; | |
| 6823645d | 32 | if (nf_ct_expect_related(exp) != 0) |
| a536df35 PM |
33 | return NF_DROP; |
| 34 | return NF_ACCEPT; | |
| 35 | } | |
| 36 | ||
| 37 | static void __exit nf_nat_tftp_fini(void) | |
| 38 | { | |
| a9b3cd7f | 39 | RCU_INIT_POINTER(nf_nat_tftp_hook, NULL); |
| a536df35 PM |
40 | synchronize_rcu(); |
| 41 | } | |
| 42 | ||
| 43 | static int __init nf_nat_tftp_init(void) | |
| 44 | { | |
| d1332e0a | 45 | BUG_ON(nf_nat_tftp_hook != NULL); |
| a9b3cd7f | 46 | RCU_INIT_POINTER(nf_nat_tftp_hook, help); |
| a536df35 PM |
47 | return 0; |
| 48 | } | |
| 49 | ||
| 50 | module_init(nf_nat_tftp_init); | |
| 51 | module_exit(nf_nat_tftp_fini); |