Release 4.11 net/netfilter/nf_nat_amanda.c
/* 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
* (C) 2006-2012 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/udp.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat_helper.h>
#include <linux/netfilter/nf_conntrack_amanda.h>
MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>");
MODULE_DESCRIPTION("Amanda NAT helper");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ip_nat_amanda");
static unsigned int help(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_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 = nf_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++) {
int res;
exp->tuple.dst.u.tcp.port = htons(port);
res = nf_ct_expect_related(exp);
if (res == 0)
break;
else if (res != -EBUSY) {
port = 0;
break;
}
}
if (port == 0) {
nf_ct_helper_log(skb, exp->master, "all ports in use");
return NF_DROP;
}
sprintf(buffer, "%u", port);
ret = nf_nat_mangle_udp_packet(skb, exp->master, ctinfo,
protoff, matchoff, matchlen,
buffer, strlen(buffer));
if (ret != NF_ACCEPT) {
nf_ct_helper_log(skb, exp->master, "cannot mangle packet");
nf_ct_unexpect_related(exp);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 189 | 78.42% | 3 | 42.86% |
| Pablo Neira Ayuso | 46 | 19.09% | 2 | 28.57% |
| Eric Dumazet | 4 | 1.66% | 1 | 14.29% |
| Herbert Xu | 2 | 0.83% | 1 | 14.29% |
| Total | 241 | 100.00% | 7 | 100.00% |
static void __exit nf_nat_amanda_fini(void)
{
RCU_INIT_POINTER(nf_nat_amanda_hook, NULL);
synchronize_rcu();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 18 | 94.74% | 1 | 50.00% |
| Stephen Hemminger | 1 | 5.26% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static int __init nf_nat_amanda_init(void)
{
BUG_ON(nf_nat_amanda_hook != NULL);
RCU_INIT_POINTER(nf_nat_amanda_hook, help);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 25 | 96.15% | 2 | 66.67% |
| Stephen Hemminger | 1 | 3.85% | 1 | 33.33% |
| Total | 26 | 100.00% | 3 | 100.00% |
module_init(nf_nat_amanda_init);
module_exit(nf_nat_amanda_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 284 | 83.28% | 5 | 45.45% |
| Pablo Neira Ayuso | 49 | 14.37% | 3 | 27.27% |
| Eric Dumazet | 4 | 1.17% | 1 | 9.09% |
| Stephen Hemminger | 2 | 0.59% | 1 | 9.09% |
| Herbert Xu | 2 | 0.59% | 1 | 9.09% |
| Total | 341 | 100.00% | 11 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.