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Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/netfilter/xt_devgroup.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Xtables: Device group match");
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MODULE_ALIAS("ipt_devgroup");
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MODULE_ALIAS("ip6t_devgroup");
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static bool devgroup_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct xt_devgroup_info *info = par->matchinfo;
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if (info->flags & XT_DEVGROUP_MATCH_SRC &&
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(((info->src_group ^ xt_in(par)->group) & info->src_mask ? 1 : 0) ^
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((info->flags & XT_DEVGROUP_INVERT_SRC) ? 1 : 0)))
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return false;
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if (info->flags & XT_DEVGROUP_MATCH_DST &&
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(((info->dst_group ^ xt_out(par)->group) & info->dst_mask ? 1 : 0) ^
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((info->flags & XT_DEVGROUP_INVERT_DST) ? 1 : 0)))
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return false;
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return true;
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}
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static int devgroup_mt_checkentry(const struct xt_mtchk_param *par)
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{
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const struct xt_devgroup_info *info = par->matchinfo;
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if (info->flags & ~(XT_DEVGROUP_MATCH_SRC | XT_DEVGROUP_INVERT_SRC |
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XT_DEVGROUP_MATCH_DST | XT_DEVGROUP_INVERT_DST))
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return -EINVAL;
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if (info->flags & XT_DEVGROUP_MATCH_SRC &&
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par->hook_mask & ~((1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_FORWARD)))
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return -EINVAL;
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if (info->flags & XT_DEVGROUP_MATCH_DST &&
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par->hook_mask & ~((1 << NF_INET_FORWARD) |
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(1 << NF_INET_LOCAL_OUT) |
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(1 << NF_INET_POST_ROUTING)))
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return -EINVAL;
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return 0;
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}
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static struct xt_match devgroup_mt_reg __read_mostly = {
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.name = "devgroup",
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.match = devgroup_mt,
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.checkentry = devgroup_mt_checkentry,
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.matchsize = sizeof(struct xt_devgroup_info),
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.family = NFPROTO_UNSPEC,
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.me = THIS_MODULE
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};
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static int __init devgroup_mt_init(void)
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{
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return xt_register_match(&devgroup_mt_reg);
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}
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static void __exit devgroup_mt_exit(void)
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{
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xt_unregister_match(&devgroup_mt_reg);
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}
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module_init(devgroup_mt_init);
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module_exit(devgroup_mt_exit);
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