author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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1 |
/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Filtering ARP tables module. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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3 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* Copyright (C) 2002 David S. Miller (davem@redhat.com) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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7 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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8 |
#include <linux/module.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/netfilter_arp/arp_tables.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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MODULE_LICENSE("GPL"); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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13 |
MODULE_DESCRIPTION("arptables filter table"); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define FILTER_VALID_HOOKS ((1 << NF_ARP_IN) | (1 << NF_ARP_OUT) | \ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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(1 << NF_ARP_FORWARD)) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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17 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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static struct |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct arpt_replace repl; |
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struct arpt_standard entries[3]; |
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struct arpt_error term; |
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} initial_table __net_initdata = { |
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.repl = { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.name = "filter", |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.valid_hooks = FILTER_VALID_HOOKS, |
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.num_entries = 4, |
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.size = sizeof(struct arpt_standard) * 3 + sizeof(struct arpt_error), |
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.hook_entry = { |
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[NF_ARP_IN] = 0, |
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[NF_ARP_OUT] = sizeof(struct arpt_standard), |
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[NF_ARP_FORWARD] = 2 * sizeof(struct arpt_standard), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}, |
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.underflow = { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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[NF_ARP_IN] = 0, |
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[NF_ARP_OUT] = sizeof(struct arpt_standard), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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[NF_ARP_FORWARD] = 2 * sizeof(struct arpt_standard), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.entries = { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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ARPT_STANDARD_INIT(NF_ACCEPT), /* ARP_IN */ |
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ARPT_STANDARD_INIT(NF_ACCEPT), /* ARP_OUT */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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ARPT_STANDARD_INIT(NF_ACCEPT), /* ARP_FORWARD */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.term = ARPT_ERROR_INIT, |
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}; |
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|
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static struct xt_table packet_filter = { |
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.name = "filter", |
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.valid_hooks = FILTER_VALID_HOOKS, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.lock = __RW_LOCK_UNLOCKED(packet_filter.lock), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.private = NULL, |
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.me = THIS_MODULE, |
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.af = NFPROTO_ARP, |
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}; |
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|
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/* The work comes in here from netfilter.c */ |
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static unsigned int arpt_in_hook(unsigned int hook, |
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struct sk_buff *skb, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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const struct net_device *in, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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const struct net_device *out, |
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int (*okfn)(struct sk_buff *)) |
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{ |
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return arpt_do_table(skb, hook, in, out, |
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dev_net(in)->ipv4.arptable_filter); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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static unsigned int arpt_out_hook(unsigned int hook, |
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struct sk_buff *skb, |
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const struct net_device *in, |
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const struct net_device *out, |
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int (*okfn)(struct sk_buff *)) |
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{ |
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return arpt_do_table(skb, hook, in, out, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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dev_net(out)->ipv4.arptable_filter); |
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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static struct nf_hook_ops arpt_ops[] __read_mostly = { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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79 |
{ |
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80 |
.hook = arpt_in_hook, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.owner = THIS_MODULE, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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.pf = NFPROTO_ARP, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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83 |
.hooknum = NF_ARP_IN, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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84 |
.priority = NF_IP_PRI_FILTER, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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85 |
}, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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86 |
{ |
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87 |
.hook = arpt_out_hook, |
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88 |
.owner = THIS_MODULE, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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89 |
.pf = NFPROTO_ARP, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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90 |
.hooknum = NF_ARP_OUT, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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91 |
.priority = NF_IP_PRI_FILTER, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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92 |
}, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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93 |
{ |
2 | 94 |
.hook = arpt_in_hook, |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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.owner = THIS_MODULE, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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96 |
.pf = NFPROTO_ARP, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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97 |
.hooknum = NF_ARP_FORWARD, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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98 |
.priority = NF_IP_PRI_FILTER, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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99 |
}, |
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100 |
}; |
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101 |
|
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102 |
static int __net_init arptable_filter_net_init(struct net *net) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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103 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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104 |
/* Register table */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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105 |
net->ipv4.arptable_filter = |
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Port of Linux 2.6.28 for use with network simulation cradle.
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106 |
arpt_register_table(net, &packet_filter, &initial_table.repl); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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107 |
if (IS_ERR(net->ipv4.arptable_filter)) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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108 |
return PTR_ERR(net->ipv4.arptable_filter); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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109 |
return 0; |
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110 |
} |
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111 |
|
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112 |
static void __net_exit arptable_filter_net_exit(struct net *net) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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113 |
{ |
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114 |
arpt_unregister_table(net->ipv4.arptable_filter); |
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115 |
} |
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116 |
|
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117 |
static struct pernet_operations arptable_filter_net_ops = { |
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118 |
.init = arptable_filter_net_init, |
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119 |
.exit = arptable_filter_net_exit, |
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120 |
}; |
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121 |
|
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122 |
static int __init arptable_filter_init(void) |
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123 |
{ |
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124 |
int ret; |
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125 |
|
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126 |
ret = register_pernet_subsys(&arptable_filter_net_ops); |
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127 |
if (ret < 0) |
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128 |
return ret; |
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129 |
|
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130 |
ret = nf_register_hooks(arpt_ops, ARRAY_SIZE(arpt_ops)); |
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131 |
if (ret < 0) |
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132 |
goto cleanup_table; |
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133 |
return ret; |
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134 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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135 |
cleanup_table: |
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136 |
unregister_pernet_subsys(&arptable_filter_net_ops); |
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137 |
return ret; |
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138 |
} |
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|
139 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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140 |
static void __exit arptable_filter_fini(void) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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141 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
142 |
nf_unregister_hooks(arpt_ops, ARRAY_SIZE(arpt_ops)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
143 |
unregister_pernet_subsys(&arptable_filter_net_ops); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
144 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
145 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
146 |
module_init(arptable_filter_init); |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
147 |
module_exit(arptable_filter_fini); |