CLASSIFY target added.

diff --git a/extensions/.CLASSIFY-test b/extensions/.CLASSIFY-test
new file mode 100755 (executable)
index 0000000..352be4c
--- /dev/null
+++ b/extensions/.CLASSIFY-test
@@ -0,0 +1,3 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/net/ipv4/netfilter/ipt_CLASSIFY.c ] && echo CLASSIFY
+

diff --git a/extensions/libipt_CLASSIFY.c b/extensions/libipt_CLASSIFY.c
new file mode 100644 (file)
index 0000000..ac14b76
--- /dev/null
+++ b/extensions/libipt_CLASSIFY.c
@@ -0,0 +1,130 @@
+/* Shared library add-on to iptables to add CLASSIFY target support. */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_CLASSIFY.h>
+#include <linux/types.h>
+#include <linux/pkt_sched.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+       printf(
+"CLASSIFY target v%s options:\n"
+"  --set-class [MAJOR:MINOR]    Set skb->priority value\n"
+"\n",
+IPTABLES_VERSION);
+}
+
+static struct option opts[] = {
+       { "set-class", 1, 0, '1' },
+       { 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct ipt_entry_target *t, unsigned int *nfcache)
+{
+}
+
+int string_to_priority(const unsigned char *s, unsigned int *p)
+{
+       unsigned int i, j;
+
+       if (sscanf(s, "%x:%x", &i, &j) != 2)
+               return 1;
+       
+       *p = TC_H_MAKE(i<<16, j);
+       return 0;
+}
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ipt_entry *entry,
+      struct ipt_entry_target **target)
+{
+       struct ipt_classify_target_info *clinfo
+               = (struct ipt_classify_target_info *)(*target)->data;
+
+       switch (c) {
+       case '1':
+               if (string_to_priority(optarg, &clinfo->priority))
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Bad class value `%s'", optarg);
+               if (*flags)
+                       exit_error(PARAMETER_PROBLEM,
+                                  "CLASSIFY: Can't specify --set-class twice");
+               *flags = 1;
+               break;
+
+       default:
+               return 0;
+       }
+
+       return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM,
+                          "CLASSIFY: Parameter --set-class is required");
+}
+
+static void
+print_class(unsigned int priority, int numeric)
+{
+       printf("%x:%x ", TC_H_MAJ(priority)>>16, TC_H_MIN(priority));
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ipt_ip *ip,
+      const struct ipt_entry_target *target,
+      int numeric)
+{
+       const struct ipt_classify_target_info *clinfo =
+               (const struct ipt_classify_target_info *)target->data;
+       printf("CLASSIFY set ");
+       print_class(clinfo->priority, numeric);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
+{
+       const struct ipt_classify_target_info *clinfo =
+               (const struct ipt_classify_target_info *)target->data;
+
+       printf("--set-class %.4x:%.4x ",
+              TC_H_MAJ(clinfo->priority)>>16, TC_H_MIN(clinfo->priority));
+}
+
+static
+struct iptables_target classify
+= { NULL,
+    "CLASSIFY",
+    IPTABLES_VERSION,
+    IPT_ALIGN(sizeof(struct ipt_classify_target_info)),
+    IPT_ALIGN(sizeof(struct ipt_classify_target_info)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+       register_target(&classify);
+}