* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * Extended to all five netfilter hooks by Brad Chapman & Harald Welte
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netdevice.h>
#include <net/sock.h>
#include <net/route.h>
#include <linux/ip.h>
+#include <net/ip.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("iptables mangle table");
-#define MANGLE_VALID_HOOKS ((1 << NF_IP_PRE_ROUTING) | \
- (1 << NF_IP_LOCAL_IN) | \
- (1 << NF_IP_FORWARD) | \
- (1 << NF_IP_LOCAL_OUT) | \
- (1 << NF_IP_POST_ROUTING))
+#define MANGLE_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | \
+ (1 << NF_INET_LOCAL_IN) | \
+ (1 << NF_INET_FORWARD) | \
+ (1 << NF_INET_LOCAL_OUT) | \
+ (1 << NF_INET_POST_ROUTING))
/* Ouch - five different hooks? Maybe this should be a config option..... -- BC */
static struct
struct ipt_replace repl;
struct ipt_standard entries[5];
struct ipt_error term;
-} initial_table __initdata
-= { { "mangle", MANGLE_VALID_HOOKS, 6,
- sizeof(struct ipt_standard) * 5 + sizeof(struct ipt_error),
- { [NF_IP_PRE_ROUTING] = 0,
- [NF_IP_LOCAL_IN] = sizeof(struct ipt_standard),
- [NF_IP_FORWARD] = sizeof(struct ipt_standard) * 2,
- [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) * 3,
- [NF_IP_POST_ROUTING] = sizeof(struct ipt_standard) * 4 },
- { [NF_IP_PRE_ROUTING] = 0,
- [NF_IP_LOCAL_IN] = sizeof(struct ipt_standard),
- [NF_IP_FORWARD] = sizeof(struct ipt_standard) * 2,
- [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) * 3,
- [NF_IP_POST_ROUTING] = sizeof(struct ipt_standard) * 4 },
- 0, NULL, { } },
- {
- /* PRE_ROUTING */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_standard),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
- -NF_ACCEPT - 1 } },
- /* LOCAL_IN */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_standard),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
- -NF_ACCEPT - 1 } },
- /* FORWARD */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_standard),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
- -NF_ACCEPT - 1 } },
- /* LOCAL_OUT */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_standard),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
- -NF_ACCEPT - 1 } },
- /* POST_ROUTING */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_standard),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
- -NF_ACCEPT - 1 } },
- },
- /* ERROR */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
- 0,
- sizeof(struct ipt_entry),
- sizeof(struct ipt_error),
- 0, { 0, 0 }, { } },
- { { { { IPT_ALIGN(sizeof(struct ipt_error_target)), IPT_ERROR_TARGET } },
- { } },
- "ERROR"
- }
- }
+} initial_table __initdata = {
+ .repl = {
+ .name = "mangle",
+ .valid_hooks = MANGLE_VALID_HOOKS,
+ .num_entries = 6,
+ .size = sizeof(struct ipt_standard) * 5 + sizeof(struct ipt_error),
+ .hook_entry = {
+ [NF_INET_PRE_ROUTING] = 0,
+ [NF_INET_LOCAL_IN] = sizeof(struct ipt_standard),
+ [NF_INET_FORWARD] = sizeof(struct ipt_standard) * 2,
+ [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard) * 3,
+ [NF_INET_POST_ROUTING] = sizeof(struct ipt_standard) * 4,
+ },
+ .underflow = {
+ [NF_INET_PRE_ROUTING] = 0,
+ [NF_INET_LOCAL_IN] = sizeof(struct ipt_standard),
+ [NF_INET_FORWARD] = sizeof(struct ipt_standard) * 2,
+ [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard) * 3,
+ [NF_INET_POST_ROUTING] = sizeof(struct ipt_standard) * 4,
+ },
+ },
+ .entries = {
+ IPT_STANDARD_INIT(NF_ACCEPT), /* PRE_ROUTING */
+ IPT_STANDARD_INIT(NF_ACCEPT), /* LOCAL_IN */
+ IPT_STANDARD_INIT(NF_ACCEPT), /* FORWARD */
+ IPT_STANDARD_INIT(NF_ACCEPT), /* LOCAL_OUT */
+ IPT_STANDARD_INIT(NF_ACCEPT), /* POST_ROUTING */
+ },
+ .term = IPT_ERROR_INIT, /* ERROR */
};
-static struct ipt_table packet_mangler = {
+static struct xt_table packet_mangler = {
.name = "mangle",
.valid_hooks = MANGLE_VALID_HOOKS,
.lock = RW_LOCK_UNLOCKED,
/* The work comes in here from netfilter.c. */
static unsigned int
ipt_route_hook(unsigned int hook,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL);
+ return ipt_do_table(skb, hook, in, out, &packet_mangler);
}
static unsigned int
ipt_local_hook(unsigned int hook,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
unsigned int ret;
+ const struct iphdr *iph;
u_int8_t tos;
- u_int32_t saddr, daddr;
- unsigned long nfmark;
+ __be32 saddr, daddr;
+ u_int32_t mark;
/* root is playing with raw sockets. */
- if ((*pskb)->len < sizeof(struct iphdr)
- || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
+ if (skb->len < sizeof(struct iphdr)
+ || ip_hdrlen(skb) < sizeof(struct iphdr)) {
if (net_ratelimit())
- printk("ipt_hook: happy cracking.\n");
+ printk("iptable_mangle: ignoring short SOCK_RAW "
+ "packet.\n");
return NF_ACCEPT;
}
/* Save things which could affect route */
- nfmark = (*pskb)->nfmark;
- saddr = (*pskb)->nh.iph->saddr;
- daddr = (*pskb)->nh.iph->daddr;
- tos = (*pskb)->nh.iph->tos;
+ mark = skb->mark;
+ iph = ip_hdr(skb);
+ saddr = iph->saddr;
+ daddr = iph->daddr;
+ tos = iph->tos;
- ret = ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL);
+ ret = ipt_do_table(skb, hook, in, out, &packet_mangler);
/* Reroute for ANY change. */
- if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE
- && ((*pskb)->nh.iph->saddr != saddr
- || (*pskb)->nh.iph->daddr != daddr
-#ifdef CONFIG_IP_ROUTE_FWMARK
- || (*pskb)->nfmark != nfmark
-#endif
- || (*pskb)->nh.iph->tos != tos))
- return ip_route_me_harder(pskb) == 0 ? ret : NF_DROP;
+ if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE) {
+ iph = ip_hdr(skb);
+
+ if (iph->saddr != saddr ||
+ iph->daddr != daddr ||
+ skb->mark != mark ||
+ iph->tos != tos)
+ if (ip_route_me_harder(skb, RTN_UNSPEC))
+ ret = NF_DROP;
+ }
return ret;
}
.hook = ipt_route_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
+ .hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP_PRI_MANGLE,
},
{
.hook = ipt_route_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
+ .hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP_PRI_MANGLE,
},
{
.hook = ipt_route_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_FORWARD,
+ .hooknum = NF_INET_FORWARD,
.priority = NF_IP_PRI_MANGLE,
},
{
.hook = ipt_local_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
+ .hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_MANGLE,
},
{
.hook = ipt_route_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
+ .hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_MANGLE,
},
};
-static int __init init(void)
+static int __init iptable_mangle_init(void)
{
int ret;
return ret;
/* Register hooks */
- ret = nf_register_hook(&ipt_ops[0]);
+ ret = nf_register_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
if (ret < 0)
goto cleanup_table;
- ret = nf_register_hook(&ipt_ops[1]);
- if (ret < 0)
- goto cleanup_hook0;
-
- ret = nf_register_hook(&ipt_ops[2]);
- if (ret < 0)
- goto cleanup_hook1;
-
- ret = nf_register_hook(&ipt_ops[3]);
- if (ret < 0)
- goto cleanup_hook2;
-
- ret = nf_register_hook(&ipt_ops[4]);
- if (ret < 0)
- goto cleanup_hook3;
-
return ret;
- cleanup_hook3:
- nf_unregister_hook(&ipt_ops[3]);
- cleanup_hook2:
- nf_unregister_hook(&ipt_ops[2]);
- cleanup_hook1:
- nf_unregister_hook(&ipt_ops[1]);
- cleanup_hook0:
- nf_unregister_hook(&ipt_ops[0]);
cleanup_table:
ipt_unregister_table(&packet_mangler);
-
return ret;
}
-static void __exit fini(void)
+static void __exit iptable_mangle_fini(void)
{
- unsigned int i;
-
- for (i = 0; i < sizeof(ipt_ops)/sizeof(struct nf_hook_ops); i++)
- nf_unregister_hook(&ipt_ops[i]);
-
+ nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
ipt_unregister_table(&packet_mangler);
}
-module_init(init);
-module_exit(fini);
+module_init(iptable_mangle_init);
+module_exit(iptable_mangle_fini);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff