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 __net_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 xt_table packet_mangler = {
.name = "mangle",
.valid_hooks = MANGLE_VALID_HOOKS,
- .lock = RW_LOCK_UNLOCKED,
+ .lock = __RW_LOCK_UNLOCKED(packet_mangler.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
/* The work comes in here from netfilter.c. */
static unsigned int
-ipt_route_hook(unsigned int hook,
- struct sk_buff **pskb,
+ipt_pre_routing_hook(unsigned int hook,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ipt_do_table(skb, hook, in, out,
+ nf_pre_routing_net(in, out)->ipv4.iptable_mangle);
+}
+
+static unsigned int
+ipt_post_routing_hook(unsigned int hook,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ipt_do_table(skb, hook, in, out,
+ nf_post_routing_net(in, out)->ipv4.iptable_mangle);
+}
+
+static unsigned int
+ipt_local_in_hook(unsigned int hook,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ipt_do_table(skb, hook, in, out,
+ nf_local_in_net(in, out)->ipv4.iptable_mangle);
+}
+
+static unsigned int
+ipt_forward_hook(unsigned int hook,
+ 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);
+ return ipt_do_table(skb, hook, in, out,
+ nf_forward_net(in, out)->ipv4.iptable_mangle);
}
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 *))
u_int32_t mark;
/* root is playing with raw sockets. */
- if ((*pskb)->len < sizeof(struct iphdr)
- || ip_hdrlen(*pskb) < 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 */
- mark = (*pskb)->mark;
- iph = ip_hdr(*pskb);
+ 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);
+ ret = ipt_do_table(skb, hook, in, out,
+ nf_local_out_net(in, out)->ipv4.iptable_mangle);
/* Reroute for ANY change. */
if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE) {
- iph = ip_hdr(*pskb);
+ iph = ip_hdr(skb);
if (iph->saddr != saddr ||
iph->daddr != daddr ||
- (*pskb)->mark != mark ||
+ skb->mark != mark ||
iph->tos != tos)
- if (ip_route_me_harder(pskb, RTN_UNSPEC))
+ if (ip_route_me_harder(skb, RTN_UNSPEC))
ret = NF_DROP;
}
return ret;
}
-static struct nf_hook_ops ipt_ops[] = {
+static struct nf_hook_ops ipt_ops[] __read_mostly = {
{
- .hook = ipt_route_hook,
+ .hook = ipt_pre_routing_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,
+ .hook = ipt_local_in_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,
+ .hook = ipt_forward_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,
+ .hook = ipt_post_routing_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
+ .hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_MANGLE,
},
};
+static int __net_init iptable_mangle_net_init(struct net *net)
+{
+ /* Register table */
+ net->ipv4.iptable_mangle =
+ ipt_register_table(net, &packet_mangler, &initial_table.repl);
+ if (IS_ERR(net->ipv4.iptable_mangle))
+ return PTR_ERR(net->ipv4.iptable_mangle);
+ return 0;
+}
+
+static void __net_exit iptable_mangle_net_exit(struct net *net)
+{
+ ipt_unregister_table(net->ipv4.iptable_mangle);
+}
+
+static struct pernet_operations iptable_mangle_net_ops = {
+ .init = iptable_mangle_net_init,
+ .exit = iptable_mangle_net_exit,
+};
+
static int __init iptable_mangle_init(void)
{
int ret;
- /* Register table */
- ret = ipt_register_table(&packet_mangler, &initial_table.repl);
+ ret = register_pernet_subsys(&iptable_mangle_net_ops);
if (ret < 0)
return ret;
return ret;
cleanup_table:
- ipt_unregister_table(&packet_mangler);
+ unregister_pernet_subsys(&iptable_mangle_net_ops);
return ret;
}
static void __exit iptable_mangle_fini(void)
{
nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
- ipt_unregister_table(&packet_mangler);
+ unregister_pernet_subsys(&iptable_mangle_net_ops);
}
module_init(iptable_mangle_init);
projects / linux-2.6 / blobdiff