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Linux/include/uapi/linux/if_tun.h

  1 /*
  2  *  Universal TUN/TAP device driver.
  3  *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
  4  *
  5  *  This program is free software; you can redistribute it and/or modify
  6  *  it under the terms of the GNU General Public License as published by
  7  *  the Free Software Foundation; either version 2 of the License, or
  8  *  (at your option) any later version.
  9  *
 10  *  This program is distributed in the hope that it will be useful,
 11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 13  *  GNU General Public License for more details.
 14  */
 15 
 16 #ifndef _UAPI__IF_TUN_H
 17 #define _UAPI__IF_TUN_H
 18 
 19 #include <linux/types.h>
 20 #include <linux/if_ether.h>
 21 #include <linux/filter.h>
 22 
 23 /* Read queue size */
 24 #define TUN_READQ_SIZE  500
 25 
 26 /* TUN device flags */
 27 #define TUN_TUN_DEV     0x0001  
 28 #define TUN_TAP_DEV     0x0002
 29 #define TUN_TYPE_MASK   0x000f
 30 
 31 #define TUN_FASYNC      0x0010
 32 #define TUN_NOCHECKSUM  0x0020
 33 #define TUN_NO_PI       0x0040
 34 /* This flag has no real effect */
 35 #define TUN_ONE_QUEUE   0x0080
 36 #define TUN_PERSIST     0x0100  
 37 #define TUN_VNET_HDR    0x0200
 38 #define TUN_TAP_MQ      0x0400
 39 
 40 /* Ioctl defines */
 41 #define TUNSETNOCSUM  _IOW('T', 200, int) 
 42 #define TUNSETDEBUG   _IOW('T', 201, int) 
 43 #define TUNSETIFF     _IOW('T', 202, int) 
 44 #define TUNSETPERSIST _IOW('T', 203, int) 
 45 #define TUNSETOWNER   _IOW('T', 204, int)
 46 #define TUNSETLINK    _IOW('T', 205, int)
 47 #define TUNSETGROUP   _IOW('T', 206, int)
 48 #define TUNGETFEATURES _IOR('T', 207, unsigned int)
 49 #define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
 50 #define TUNSETTXFILTER _IOW('T', 209, unsigned int)
 51 #define TUNGETIFF      _IOR('T', 210, unsigned int)
 52 #define TUNGETSNDBUF   _IOR('T', 211, int)
 53 #define TUNSETSNDBUF   _IOW('T', 212, int)
 54 #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
 55 #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
 56 #define TUNGETVNETHDRSZ _IOR('T', 215, int)
 57 #define TUNSETVNETHDRSZ _IOW('T', 216, int)
 58 #define TUNSETQUEUE  _IOW('T', 217, int)
 59 #define TUNSETIFINDEX   _IOW('T', 218, unsigned int)
 60 #define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
 61 
 62 /* TUNSETIFF ifr flags */
 63 #define IFF_TUN         0x0001
 64 #define IFF_TAP         0x0002
 65 #define IFF_NO_PI       0x1000
 66 /* This flag has no real effect */
 67 #define IFF_ONE_QUEUE   0x2000
 68 #define IFF_VNET_HDR    0x4000
 69 #define IFF_TUN_EXCL    0x8000
 70 #define IFF_MULTI_QUEUE 0x0100
 71 #define IFF_ATTACH_QUEUE 0x0200
 72 #define IFF_DETACH_QUEUE 0x0400
 73 /* read-only flag */
 74 #define IFF_PERSIST     0x0800
 75 #define IFF_NOFILTER    0x1000
 76 
 77 /* Socket options */
 78 #define TUN_TX_TIMESTAMP 1
 79 
 80 /* Features for GSO (TUNSETOFFLOAD). */
 81 #define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
 82 #define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
 83 #define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
 84 #define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
 85 #define TUN_F_UFO       0x10    /* I can handle UFO packets */
 86 
 87 /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
 88 #define TUN_PKT_STRIP   0x0001
 89 struct tun_pi {
 90         __u16  flags;
 91         __be16 proto;
 92 };
 93 
 94 /*
 95  * Filter spec (used for SETXXFILTER ioctls)
 96  * This stuff is applicable only to the TAP (Ethernet) devices.
 97  * If the count is zero the filter is disabled and the driver accepts
 98  * all packets (promisc mode).
 99  * If the filter is enabled in order to accept broadcast packets
100  * broadcast addr must be explicitly included in the addr list.
101  */
102 #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
103 struct tun_filter {
104         __u16  flags; /* TUN_FLT_ flags see above */
105         __u16  count; /* Number of addresses */
106         __u8   addr[0][ETH_ALEN];
107 };
108 
109 #endif /* _UAPI__IF_TUN_H */
110 

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