diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/netfilter/xt_dscp.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/netfilter/xt_dscp.c')
-rw-r--r-- | kernel/net/netfilter/xt_dscp.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/kernel/net/netfilter/xt_dscp.c b/kernel/net/netfilter/xt_dscp.c new file mode 100644 index 000000000..64670fc5d --- /dev/null +++ b/kernel/net/netfilter/xt_dscp.c @@ -0,0 +1,115 @@ +/* IP tables module for matching the value of the IPv4/IPv6 DSCP field + * + * (C) 2002 by Harald Welte <laforge@netfilter.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/module.h> +#include <linux/skbuff.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <net/dsfield.h> + +#include <linux/netfilter/x_tables.h> +#include <linux/netfilter/xt_dscp.h> + +MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); +MODULE_DESCRIPTION("Xtables: DSCP/TOS field match"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_dscp"); +MODULE_ALIAS("ip6t_dscp"); +MODULE_ALIAS("ipt_tos"); +MODULE_ALIAS("ip6t_tos"); + +static bool +dscp_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_dscp_info *info = par->matchinfo; + u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT; + + return (dscp == info->dscp) ^ !!info->invert; +} + +static bool +dscp_mt6(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_dscp_info *info = par->matchinfo; + u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT; + + return (dscp == info->dscp) ^ !!info->invert; +} + +static int dscp_mt_check(const struct xt_mtchk_param *par) +{ + const struct xt_dscp_info *info = par->matchinfo; + + if (info->dscp > XT_DSCP_MAX) { + pr_info("dscp %x out of range\n", info->dscp); + return -EDOM; + } + + return 0; +} + +static bool tos_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_tos_match_info *info = par->matchinfo; + + if (par->family == NFPROTO_IPV4) + return ((ip_hdr(skb)->tos & info->tos_mask) == + info->tos_value) ^ !!info->invert; + else + return ((ipv6_get_dsfield(ipv6_hdr(skb)) & info->tos_mask) == + info->tos_value) ^ !!info->invert; +} + +static struct xt_match dscp_mt_reg[] __read_mostly = { + { + .name = "dscp", + .family = NFPROTO_IPV4, + .checkentry = dscp_mt_check, + .match = dscp_mt, + .matchsize = sizeof(struct xt_dscp_info), + .me = THIS_MODULE, + }, + { + .name = "dscp", + .family = NFPROTO_IPV6, + .checkentry = dscp_mt_check, + .match = dscp_mt6, + .matchsize = sizeof(struct xt_dscp_info), + .me = THIS_MODULE, + }, + { + .name = "tos", + .revision = 1, + .family = NFPROTO_IPV4, + .match = tos_mt, + .matchsize = sizeof(struct xt_tos_match_info), + .me = THIS_MODULE, + }, + { + .name = "tos", + .revision = 1, + .family = NFPROTO_IPV6, + .match = tos_mt, + .matchsize = sizeof(struct xt_tos_match_info), + .me = THIS_MODULE, + }, +}; + +static int __init dscp_mt_init(void) +{ + return xt_register_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg)); +} + +static void __exit dscp_mt_exit(void) +{ + xt_unregister_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg)); +} + +module_init(dscp_mt_init); +module_exit(dscp_mt_exit); |