Release 4.11 net/bridge/netfilter/ebt_snat.c
/*
* ebt_snat
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
*
* June, 2002
*
*/
#include <linux/module.h>
#include <net/sock.h>
#include <linux/if_arp.h>
#include <net/arp.h>
#include <linux/netfilter.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_nat.h>
static unsigned int
ebt_snat_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct ebt_nat_info *info = par->targinfo;
if (!skb_make_writable(skb, 0))
return EBT_DROP;
ether_addr_copy(eth_hdr(skb)->h_source, info->mac);
if (!(info->target & NAT_ARP_BIT) &&
eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
const struct arphdr *ap;
struct arphdr _ah;
ap = skb_header_pointer(skb, 0, sizeof(_ah), &_ah);
if (ap == NULL)
return EBT_DROP;
if (ap->ar_hln != ETH_ALEN)
goto out;
if (skb_store_bits(skb, sizeof(_ah), info->mac, ETH_ALEN))
return EBT_DROP;
}
out:
return info->target | ~EBT_VERDICT_BITS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bart De Schuymer | 131 | 82.91% | 3 | 21.43% |
| Jan Engelhardt | 13 | 8.23% | 5 | 35.71% |
| Herbert Xu | 8 | 5.06% | 2 | 14.29% |
| Arnaldo Carvalho de Melo | 3 | 1.90% | 1 | 7.14% |
| Joonwoo Park | 2 | 1.27% | 2 | 14.29% |
| Joe Perches | 1 | 0.63% | 1 | 7.14% |
| Total | 158 | 100.00% | 14 | 100.00% |
static int ebt_snat_tg_check(const struct xt_tgchk_param *par)
{
const struct ebt_nat_info *info = par->targinfo;
int tmp;
tmp = info->target | ~EBT_VERDICT_BITS;
if (BASE_CHAIN && tmp == EBT_RETURN)
return -EINVAL;
if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0)
return -EINVAL;
tmp = info->target | EBT_VERDICT_BITS;
if ((tmp & ~NAT_ARP_BIT) != ~NAT_ARP_BIT)
return -EINVAL;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bart De Schuymer | 73 | 82.95% | 2 | 28.57% |
| Jan Engelhardt | 15 | 17.05% | 5 | 71.43% |
| Total | 88 | 100.00% | 7 | 100.00% |
static struct xt_target ebt_snat_tg_reg __read_mostly = {
.name = "snat",
.revision = 0,
.family = NFPROTO_BRIDGE,
.table = "nat",
.hooks = (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_POST_ROUTING),
.target = ebt_snat_tg,
.checkentry = ebt_snat_tg_check,
.targetsize = sizeof(struct ebt_nat_info),
.me = THIS_MODULE,
};
static int __init ebt_snat_init(void)
{
return xt_register_target(&ebt_snat_tg_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bart De Schuymer | 13 | 81.25% | 1 | 33.33% |
| Jan Engelhardt | 2 | 12.50% | 1 | 33.33% |
| Andrew Morton | 1 | 6.25% | 1 | 33.33% |
| Total | 16 | 100.00% | 3 | 100.00% |
static void __exit ebt_snat_fini(void)
{
xt_unregister_target(&ebt_snat_tg_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bart De Schuymer | 12 | 80.00% | 1 | 33.33% |
| Jan Engelhardt | 2 | 13.33% | 1 | 33.33% |
| Andrew Morton | 1 | 6.67% | 1 | 33.33% |
| Total | 15 | 100.00% | 3 | 100.00% |
module_init(ebt_snat_init);
module_exit(ebt_snat_fini);
MODULE_DESCRIPTION("Ebtables: Source MAC address translation");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bart De Schuymer | 276 | 70.95% | 4 | 16.00% |
| Jan Engelhardt | 93 | 23.91% | 14 | 56.00% |
| Herbert Xu | 10 | 2.57% | 2 | 8.00% |
| Andrew Morton | 4 | 1.03% | 1 | 4.00% |
| Arnaldo Carvalho de Melo | 3 | 0.77% | 1 | 4.00% |
| Joonwoo Park | 2 | 0.51% | 2 | 8.00% |
| Joe Perches | 1 | 0.26% | 1 | 4.00% |
| Total | 389 | 100.00% | 25 | 100.00% |
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