patch-2.3.99-pre2 linux/net/ipv4/netfilter/ipt_tos.c

• Lines: 54
• Date: Fri Mar 17 10:56:20 2000
• Orig file: v2.3.99-pre1/linux/net/ipv4/netfilter/ipt_tos.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre1/linux/net/ipv4/netfilter/ipt_tos.c linux/net/ipv4/netfilter/ipt_tos.c
@@ -0,0 +1,53 @@
+/* Kernel module to match TOS values. */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter_ipv4/ipt_tos.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+EXPORT_NO_SYMBOLS;
+
+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_tos_info *info = matchinfo;
+	const struct iphdr *iph = skb->nh.iph;
+
+	return (iph->tos == info->tos) ^ info->invert;
+}
+
+static int
+checkentry(const char *tablename,
+           const struct ipt_ip *ip,
+           void *matchinfo,
+           unsigned int matchsize,
+           unsigned int hook_mask)
+{
+	if (matchsize != IPT_ALIGN(sizeof(struct ipt_tos_info)))
+		return 0;
+
+	return 1;
+}
+
+static struct ipt_match tos_match
+= { { NULL, NULL }, "tos", &match, &checkentry, THIS_MODULE };
+
+static int __init init(void)
+{
+	return ipt_register_match(&tos_match);
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_match(&tos_match);
+}
+
+module_init(init);
+module_exit(fini);