diff options
Diffstat (limited to 'release/src/linux/linux/net/ipv4/netfilter/ipt_CLASSIFY.c')
-rw-r--r-- | release/src/linux/linux/net/ipv4/netfilter/ipt_CLASSIFY.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/release/src/linux/linux/net/ipv4/netfilter/ipt_CLASSIFY.c b/release/src/linux/linux/net/ipv4/netfilter/ipt_CLASSIFY.c new file mode 100644 index 00000000..f7320721 --- /dev/null +++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_CLASSIFY.c @@ -0,0 +1,82 @@ +/* + * This is a module which is used for setting the skb->priority field + * of an skb for qdisc classification. + */ + +#include <linux/module.h> +#include <linux/skbuff.h> +#include <linux/ip.h> +#include <net/checksum.h> + +#include <linux/netfilter_ipv4/ip_tables.h> +#include <linux/netfilter_ipv4/ipt_CLASSIFY.h> + +MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("iptables qdisc classification target module"); + +static unsigned int +target(struct sk_buff **pskb, + unsigned int hooknum, + const struct net_device *in, + const struct net_device *out, + const void *targinfo, + void *userinfo) +{ + const struct ipt_classify_target_info *clinfo = targinfo; + + if((*pskb)->priority != clinfo->priority) { + (*pskb)->priority = clinfo->priority; + (*pskb)->nfcache |= NFC_ALTERED; + } + + return IPT_CONTINUE; +} + +static int +checkentry(const char *tablename, + const struct ipt_entry *e, + void *targinfo, + unsigned int targinfosize, + unsigned int hook_mask) +{ + if (targinfosize != IPT_ALIGN(sizeof(struct ipt_classify_target_info))){ + printk(KERN_ERR "CLASSIFY: invalid size (%u != %u).\n", + targinfosize, + IPT_ALIGN(sizeof(struct ipt_classify_target_info))); + return 0; + } + + if (hook_mask & ~(1 << NF_IP_POST_ROUTING)) { + printk(KERN_ERR "CLASSIFY: only valid in POST_ROUTING.\n"); + return 0; + } + + if (strcmp(tablename, "mangle") != 0) { + printk(KERN_WARNING "CLASSIFY: can only be called from " + "\"mangle\" table, not \"%s\".\n", + tablename); + return 0; + } + + return 1; +} + +static struct ipt_target ipt_classify_reg += { { NULL, NULL }, "CLASSIFY", target, checkentry, NULL, THIS_MODULE }; + +static int __init init(void) +{ + if (ipt_register_target(&ipt_classify_reg)) + return -EINVAL; + + return 0; +} + +static void __exit fini(void) +{ + ipt_unregister_target(&ipt_classify_reg); +} + +module_init(init); +module_exit(fini); |