8c644623fe
Introduce a new syscall TUNSETGROUP for group ownership setting of tap devices. The user now is allowed to send packages if either his euid or his egid matches the one specified via tunctl (via -u or -g respecitvely). If both, gid and uid, are set via tunctl, both have to match. Signed-off-by: Guido Guenther <agx@sigxcpu.org> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Universal TUN/TAP device driver.
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* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* $Id: if_tun.h,v 1.2 2001/06/01 18:39:47 davem Exp $
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*/
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#ifndef __IF_TUN_H
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#define __IF_TUN_H
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/* Uncomment to enable debugging */
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/* #define TUN_DEBUG 1 */
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#ifdef __KERNEL__
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#ifdef TUN_DEBUG
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#define DBG if(tun->debug)printk
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#define DBG1 if(debug==2)printk
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#else
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#define DBG( a... )
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#define DBG1( a... )
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#endif
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struct tun_struct {
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struct list_head list;
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unsigned long flags;
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int attached;
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uid_t owner;
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gid_t group;
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wait_queue_head_t read_wait;
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struct sk_buff_head readq;
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struct net_device *dev;
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struct net_device_stats stats;
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struct fasync_struct *fasync;
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unsigned long if_flags;
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u8 dev_addr[ETH_ALEN];
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u32 chr_filter[2];
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u32 net_filter[2];
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#ifdef TUN_DEBUG
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int debug;
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#endif
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};
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#endif /* __KERNEL__ */
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/* Read queue size */
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#define TUN_READQ_SIZE 500
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/* TUN device flags */
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#define TUN_TUN_DEV 0x0001
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#define TUN_TAP_DEV 0x0002
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#define TUN_TYPE_MASK 0x000f
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#define TUN_FASYNC 0x0010
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#define TUN_NOCHECKSUM 0x0020
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#define TUN_NO_PI 0x0040
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#define TUN_ONE_QUEUE 0x0080
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#define TUN_PERSIST 0x0100
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/* Ioctl defines */
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#define TUNSETNOCSUM _IOW('T', 200, int)
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#define TUNSETDEBUG _IOW('T', 201, int)
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#define TUNSETIFF _IOW('T', 202, int)
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#define TUNSETPERSIST _IOW('T', 203, int)
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#define TUNSETOWNER _IOW('T', 204, int)
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#define TUNSETLINK _IOW('T', 205, int)
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#define TUNSETGROUP _IOW('T', 206, int)
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/* TUNSETIFF ifr flags */
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#define IFF_TUN 0x0001
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#define IFF_TAP 0x0002
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#define IFF_NO_PI 0x1000
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#define IFF_ONE_QUEUE 0x2000
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struct tun_pi {
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unsigned short flags;
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unsigned short proto;
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};
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#define TUN_PKT_STRIP 0x0001
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#endif /* __IF_TUN_H */
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