diff options
Diffstat (limited to 'kernel/linux/net/bridge/netfilter/ebt_redirect.c')
-rw-r--r-- | kernel/linux/net/bridge/netfilter/ebt_redirect.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/kernel/linux/net/bridge/netfilter/ebt_redirect.c b/kernel/linux/net/bridge/netfilter/ebt_redirect.c new file mode 100644 index 0000000..c26d57b --- /dev/null +++ b/kernel/linux/net/bridge/netfilter/ebt_redirect.c @@ -0,0 +1,65 @@ +/* + * ebt_redirect + * + * Authors: + * Bart De Schuymer <bart.de.schuymer@pandora.be> + * + * April, 2002 + * + */ + +#include <linux/netfilter_bridge/ebtables.h> +#include <linux/netfilter_bridge/ebt_redirect.h> +#include <linux/netfilter_bridge.h> +#include <linux/skbuff.h> +#include <linux/module.h> +#include <net/sock.h> +#include "../br_private.h" + +static __u8 ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr, + const struct net_device *in, const struct net_device *out, + const void *data, unsigned int datalen) +{ + struct ebt_redirect_info *infostuff = (struct ebt_redirect_info *) data; + + memcpy((**pskb).mac.ethernet->h_dest, + in->br_port->br->dev.dev_addr, ETH_ALEN); + (*pskb)->pkt_type = PACKET_HOST; + return infostuff->target; +} + +static int ebt_target_redirect_check(const char *tablename, unsigned int hooknr, + const struct ebt_entry *e, void *data, unsigned int datalen) +{ + struct ebt_redirect_info *infostuff = (struct ebt_redirect_info *) data; + + if ( (strcmp(tablename, "nat") || hooknr != NF_BR_PRE_ROUTING) && + (strcmp(tablename, "broute") || hooknr != NF_BR_BROUTING) ) + return -EINVAL; + if (datalen != sizeof(struct ebt_redirect_info)) + return -EINVAL; + if (infostuff->target >= NUM_STANDARD_TARGETS) + return -EINVAL; + return 0; +} + +static struct ebt_target redirect_target = +{ + {NULL, NULL}, EBT_REDIRECT_TARGET, ebt_target_redirect, + ebt_target_redirect_check, NULL, THIS_MODULE +}; + +static int __init init(void) +{ + return ebt_register_target(&redirect_target); +} + +static void __exit fini(void) +{ + ebt_unregister_target(&redirect_target); +} + +module_init(init); +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); |