From e6869a8f59d779ff4d5a0984c86d80db70784962 Mon Sep 17 00:00:00 2001
From: Marc Boucher <marc@mbsi.ca>
Date: Mon, 20 Mar 2000 06:03:29 +0000
Subject: reorganized tree after kernel merge

---
 extensions/libipt_TOS.c | 173 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 extensions/libipt_TOS.c

(limited to 'extensions/libipt_TOS.c')

diff --git a/extensions/libipt_TOS.c b/extensions/libipt_TOS.c
new file mode 100644
index 00000000..4a8e91ba
--- /dev/null
+++ b/extensions/libipt_TOS.c
@@ -0,0 +1,173 @@
+/* Shared library add-on to iptables to add TOS 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_TOS.h>
+
+struct tosinfo {
+	struct ipt_entry_target t;
+	struct ipt_tos_target_info tos;
+};
+
+/* TOS names and values. */
+struct TOS_value
+{
+	unsigned char TOS;
+	const char *name;
+} TOS_values[] = {
+	{ IPTOS_LOWDELAY,    "Minimize-Delay" },
+	{ IPTOS_THROUGHPUT,  "Maximize-Throughput" },
+	{ IPTOS_RELIABILITY, "Maximize-Reliability" },
+	{ IPTOS_MINCOST,     "Minimize-Cost" },
+	{ IPTOS_NORMALSVC,   "Normal-Service" },
+};
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+	unsigned int i;
+	
+	printf(
+"TOS target v%s options:\n"
+"  --set-tos value                   Set Type of Service field to one of the\n"
+"                                following numeric or descriptive values:\n",
+NETFILTER_VERSION);
+
+	for (i = 0; i < sizeof(TOS_values)/sizeof(struct TOS_value);i++)
+		printf("                                     %s %u (0x%02x)\n",
+		       TOS_values[i].name,
+                       TOS_values[i].TOS,
+                       TOS_values[i].TOS);
+	fputc('\n', stdout);
+}
+
+static struct option opts[] = {
+	{ "set-tos", 1, 0, '1' },
+	{ 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct ipt_entry_target *t, unsigned int *nfcache)
+{
+}
+
+static void
+parse_tos(const unsigned char *s, struct ipt_tos_target_info *info)
+{
+	unsigned int i;
+	int tos = string_to_number(s, 0, 255);
+
+	if (tos != -1) {
+		if (tos == IPTOS_LOWDELAY
+		    || tos == IPTOS_THROUGHPUT
+		    || tos == IPTOS_RELIABILITY
+		    || tos == IPTOS_MINCOST
+		    || tos == IPTOS_NORMALSVC) {
+		    	info->tos = (u_int8_t )tos;
+		    	return;
+		}
+	} else {
+		for (i = 0; i<sizeof(TOS_values)/sizeof(struct TOS_value); i++)
+			if (strcasecmp(s,TOS_values[i].name) == 0) {
+				info->tos = TOS_values[i].TOS;
+				return;
+			}
+	}
+	exit_error(PARAMETER_PROBLEM, "Bad TOS value `%s'", s);
+}
+
+/* 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_tos_target_info *tosinfo
+		= (struct ipt_tos_target_info *)(*target)->data;
+
+	switch (c) {
+	case '1':
+		if (*flags)
+			exit_error(PARAMETER_PROBLEM,
+			           "TOS target: Cant specify --set-tos twice");
+		parse_tos(optarg, tosinfo);
+		*flags = 1;
+		break;
+		
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+	if (!flags)
+		exit_error(PARAMETER_PROBLEM,
+		           "TOS target: Parameter --set-tos is required");
+}
+
+static void
+print_tos(u_int8_t tos, int numeric)
+{
+	unsigned int i;
+	
+	if (!numeric) {
+		for (i = 0; i<sizeof(TOS_values)/sizeof(struct TOS_value); i++)
+			if (TOS_values[i].TOS == tos) {
+				printf("%s ", TOS_values[i].name);
+				return;
+			}
+	}
+	printf("0x%02x ", tos);
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ipt_ip *ip,
+      const struct ipt_entry_target *target,
+      int numeric)
+{
+	const struct ipt_tos_target_info *tosinfo =
+		(const struct ipt_tos_target_info *)target->data;
+	printf("TOS set ");
+	print_tos(tosinfo->tos, 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_tos_target_info *tosinfo =
+		(const struct ipt_tos_target_info *)target->data;
+	
+	printf("--set-tos 0x%02x ", tosinfo->tos);	
+}
+
+struct iptables_target tos
+= { NULL,
+    "TOS",
+    NETFILTER_VERSION,
+    sizeof(struct ipt_tos_target_info),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+	register_target(&tos);
+}
-- 
cgit v1.2.3