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![Thomas Gleixner](/assets/img/avatar_default.png)
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>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* (C) 1999-2001 Michal Ludvig <michal@logix.cz>
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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/if_ether.h>
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#include <linux/if_packet.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/netfilter/xt_pkttype.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Michal Ludvig <michal@logix.cz>");
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MODULE_DESCRIPTION("Xtables: link layer packet type match");
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MODULE_ALIAS("ipt_pkttype");
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MODULE_ALIAS("ip6t_pkttype");
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static bool
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pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct xt_pkttype_info *info = par->matchinfo;
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u_int8_t type;
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if (skb->pkt_type != PACKET_LOOPBACK)
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type = skb->pkt_type;
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else if (xt_family(par) == NFPROTO_IPV4 &&
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ipv4_is_multicast(ip_hdr(skb)->daddr))
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type = PACKET_MULTICAST;
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else if (xt_family(par) == NFPROTO_IPV6)
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type = PACKET_MULTICAST;
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else
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type = PACKET_BROADCAST;
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return (type == info->pkttype) ^ info->invert;
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}
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static struct xt_match pkttype_mt_reg __read_mostly = {
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.name = "pkttype",
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.revision = 0,
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.family = NFPROTO_UNSPEC,
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.match = pkttype_mt,
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.matchsize = sizeof(struct xt_pkttype_info),
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.me = THIS_MODULE,
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};
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static int __init pkttype_mt_init(void)
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{
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return xt_register_match(&pkttype_mt_reg);
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}
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static void __exit pkttype_mt_exit(void)
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{
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xt_unregister_match(&pkttype_mt_reg);
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}
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module_init(pkttype_mt_init);
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module_exit(pkttype_mt_exit);
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