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author | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
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committer | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
commit | 008d0be72b2f160382c6e880765e96b64a050c65 (patch) | |
tree | 36f48a98a3815a408e2ce1693dd182af90f80305 /release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c | |
parent | 611becfb8726c60cb060368541ad98191d4532f5 (diff) | |
download | tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.gz tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.bz2 |
imported original firmware WRT54GL_v4.30.11_11_US
Diffstat (limited to 'release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c')
-rw-r--r-- | release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c b/release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c new file mode 100644 index 00000000..b320e29b --- /dev/null +++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_mac.c @@ -0,0 +1,65 @@ +/* Kernel module to match MAC address parameters. */ +#include <linux/module.h> +#include <linux/skbuff.h> +#include <linux/if_ether.h> + +#include <linux/netfilter_ipv4/ipt_mac.h> +#include <linux/netfilter_ipv4/ip_tables.h> + +static int +match(const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const void *matchinfo, + int offset, + const void *hdr, + u_int16_t datalen, + int *hotdrop) +{ + const struct ipt_mac_info *info = matchinfo; + + /* Is mac pointer valid? */ + return (skb->mac.raw >= skb->head + && (skb->mac.raw + ETH_HLEN) <= skb->data + /* If so, compare... */ + && ((memcmp(skb->mac.ethernet->h_source, info->srcaddr, ETH_ALEN) + == 0) ^ info->invert)); +} + +static int +ipt_mac_checkentry(const char *tablename, + const struct ipt_ip *ip, + void *matchinfo, + unsigned int matchsize, + unsigned int hook_mask) +{ + /* FORWARD isn't always valid, but it's nice to be able to do --RR */ + if (hook_mask + & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN) + | (1 << NF_IP_FORWARD))) { + printk("ipt_mac: only valid for PRE_ROUTING, LOCAL_IN or FORWARD.\n"); + return 0; + } + + if (matchsize != IPT_ALIGN(sizeof(struct ipt_mac_info))) + return 0; + + return 1; +} + +static struct ipt_match mac_match += { { NULL, NULL }, "mac", &match, &ipt_mac_checkentry, NULL, THIS_MODULE }; + +static int __init init(void) +{ + return ipt_register_match(&mac_match); +} + +static void __exit fini(void) +{ + ipt_unregister_match(&mac_match); +} + +module_init(init); +module_exit(fini); +MODULE_LICENSE("GPL"); |