patch-2.4.20 linux-2.4.20/net/ipv4/netfilter/ipt_dscp.c
Next file: linux-2.4.20/net/ipv4/netfilter/ipt_ecn.c
Previous file: linux-2.4.20/net/ipv4/netfilter/ipt_conntrack.c
Back to the patch index
Back to the overall index
- Lines: 59
- Date:
Thu Nov 28 15:53:15 2002
- Orig file:
linux-2.4.19/net/ipv4/netfilter/ipt_dscp.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/net/ipv4/netfilter/ipt_dscp.c linux-2.4.20/net/ipv4/netfilter/ipt_dscp.c
@@ -0,0 +1,58 @@
+/* IP tables module for matching the value of the IPv4 DSCP field
+ *
+ * ipt_dscp.c,v 1.3 2002/08/05 19:00:21 laforge Exp
+ *
+ * (C) 2002 by Harald Welte <laforge@gnumonks.org>
+ *
+ * This software is distributed under the terms GNU GPL
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter_ipv4/ipt_dscp.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("IP tables DSCP matching module");
+MODULE_LICENSE("GPL");
+
+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_dscp_info *info = matchinfo;
+ const struct iphdr *iph = skb->nh.iph;
+
+ u_int8_t sh_dscp = ((info->dscp << IPT_DSCP_SHIFT) & IPT_DSCP_MASK);
+
+ return ((iph->tos&IPT_DSCP_MASK) == sh_dscp) ^ 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_dscp_info)))
+ return 0;
+
+ return 1;
+}
+
+static struct ipt_match dscp_match = { { NULL, NULL }, "dscp", &match,
+ &checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ return ipt_register_match(&dscp_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&dscp_match);
+
+}
+
+module_init(init);
+module_exit(fini);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)