84 lines
2.0 KiB
C
Executable File
84 lines
2.0 KiB
C
Executable File
/* x_tables module for setting the IPv4/IPv6 DSCP field, Version 1.8
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*
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* (C) 2002 by Harald Welte <laforge@netfilter.org>
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* based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh <mgm@paktronix.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* See RFC2474 for a description of the DSCP field within the IP Header.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_PRIO.h>
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MODULE_AUTHOR("SAMSUNG Electronics, IPC team <@samsung.com>");
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MODULE_DESCRIPTION("Xtables: PRIO modification");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_PRIO");
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MODULE_ALIAS("ip6t_PRIO");
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#define XT_PRIO_MAX 0xFFFFFFFF
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#define HIGH_PRIO 0x10
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static unsigned int
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prio_tg(struct sk_buff *skb, const struct xt_action_param *par)
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{
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const struct xt_PRIO_info *dinfo = par->targinfo;
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skb->priomark = dinfo->prio;
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return XT_CONTINUE;
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}
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static int prio_tg_check(const struct xt_tgchk_param *par)
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{
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const struct xt_PRIO_info *info = par->targinfo;
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if (info->prio > XT_PRIO_MAX) {
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pr_info("prio %x out of range\n", info->prio);
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return -EDOM;
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}
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return 0;
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}
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static struct xt_target prio_tg_reg[] __read_mostly = {
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{
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.name = "PRIO",
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.family = NFPROTO_IPV4,
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.checkentry = prio_tg_check,
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.target = prio_tg,
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.targetsize = sizeof(struct xt_PRIO_info),
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.table = "mangle",
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.me = THIS_MODULE,
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},
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{
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.name = "PRIO",
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.family = NFPROTO_IPV6,
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.checkentry = prio_tg_check,
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.target = prio_tg,
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.targetsize = sizeof(struct xt_PRIO_info),
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.table = "mangle",
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.me = THIS_MODULE,
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},
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};
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static int __init prio_tg_init(void)
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{
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return xt_register_targets(prio_tg_reg, ARRAY_SIZE(prio_tg_reg));
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}
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static void __exit prio_tg_exit(void)
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{
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xt_unregister_targets(prio_tg_reg, ARRAY_SIZE(prio_tg_reg));
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}
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module_init(prio_tg_init);
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module_exit(prio_tg_exit);
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