diff options
Diffstat (limited to 'net/ipv4/netfilter/ip_nat_amanda.c')
-rw-r--r-- | net/ipv4/netfilter/ip_nat_amanda.c | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/net/ipv4/netfilter/ip_nat_amanda.c b/net/ipv4/netfilter/ip_nat_amanda.c deleted file mode 100644 index 85df1a9aed33..000000000000 --- a/net/ipv4/netfilter/ip_nat_amanda.c +++ /dev/null @@ -1,85 +0,0 @@ -/* Amanda extension for TCP NAT alteration. - * (C) 2002 by Brian J. Murrell <netfilter@interlinx.bc.ca> - * based on a copy of HW's ip_nat_irc.c as well as other modules - * - * 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. - * - * Module load syntax: - * insmod ip_nat_amanda.o - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/netfilter.h> -#include <linux/skbuff.h> -#include <linux/ip.h> -#include <linux/udp.h> -#include <net/tcp.h> -#include <net/udp.h> - -#include <linux/netfilter_ipv4.h> -#include <linux/netfilter_ipv4/ip_nat.h> -#include <linux/netfilter_ipv4/ip_nat_helper.h> -#include <linux/netfilter_ipv4/ip_conntrack_helper.h> -#include <linux/netfilter_ipv4/ip_conntrack_amanda.h> - - -MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>"); -MODULE_DESCRIPTION("Amanda NAT helper"); -MODULE_LICENSE("GPL"); - -static unsigned int help(struct sk_buff **pskb, - enum ip_conntrack_info ctinfo, - unsigned int matchoff, - unsigned int matchlen, - struct ip_conntrack_expect *exp) -{ - char buffer[sizeof("65535")]; - u_int16_t port; - unsigned int ret; - - /* Connection comes from client. */ - exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port; - exp->dir = IP_CT_DIR_ORIGINAL; - - /* When you see the packet, we need to NAT it the same as the - * this one (ie. same IP: it will be TCP and master is UDP). */ - exp->expectfn = ip_nat_follow_master; - - /* Try to get same port: if not, try to change it. */ - for (port = ntohs(exp->saved_proto.tcp.port); port != 0; port++) { - exp->tuple.dst.u.tcp.port = htons(port); - if (ip_conntrack_expect_related(exp) == 0) - break; - } - - if (port == 0) - return NF_DROP; - - sprintf(buffer, "%u", port); - ret = ip_nat_mangle_udp_packet(pskb, exp->master, ctinfo, - matchoff, matchlen, - buffer, strlen(buffer)); - if (ret != NF_ACCEPT) - ip_conntrack_unexpect_related(exp); - return ret; -} - -static void __exit ip_nat_amanda_fini(void) -{ - rcu_assign_pointer(ip_nat_amanda_hook, NULL); - synchronize_rcu(); -} - -static int __init ip_nat_amanda_init(void) -{ - BUG_ON(rcu_dereference(ip_nat_amanda_hook)); - rcu_assign_pointer(ip_nat_amanda_hook, help); - return 0; -} - -module_init(ip_nat_amanda_init); -module_exit(ip_nat_amanda_fini); |