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01: /*
02:  *  Universal TUN/TAP device driver.
03:  *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
04:  *
05:  *  This program is free software; you can redistribute it and/or modify
06:  *  it under the terms of the GNU General Public License as published by
07:  *  the Free Software Foundation; either version 2 of the License, or
08:  *  (at your option) any later version.
09:  *
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 __IF_TUN_H
17: #define __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: #define TUN_ONE_QUEUE   0x0080
35: #define TUN_PERSIST     0x0100  
36: #define TUN_VNET_HDR    0x0200
37: 
38: /* Ioctl defines */
39: #define TUNSETNOCSUM  _IOW('T', 200, int) 
40: #define TUNSETDEBUG   _IOW('T', 201, int) 
41: #define TUNSETIFF     _IOW('T', 202, int) 
42: #define TUNSETPERSIST _IOW('T', 203, int) 
43: #define TUNSETOWNER   _IOW('T', 204, int)
44: #define TUNSETLINK    _IOW('T', 205, int)
45: #define TUNSETGROUP   _IOW('T', 206, int)
46: #define TUNGETFEATURES _IOR('T', 207, unsigned int)
47: #define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
48: #define TUNSETTXFILTER _IOW('T', 209, unsigned int)
49: #define TUNGETIFF      _IOR('T', 210, unsigned int)
50: #define TUNGETSNDBUF   _IOR('T', 211, int)
51: #define TUNSETSNDBUF   _IOW('T', 212, int)
52: #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
53: #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
54: #define TUNGETVNETHDRSZ _IOR('T', 215, int)
55: #define TUNSETVNETHDRSZ _IOW('T', 216, int)
56: 
57: /* TUNSETIFF ifr flags */
58: #define IFF_TUN         0x0001
59: #define IFF_TAP         0x0002
60: #define IFF_NO_PI       0x1000
61: #define IFF_ONE_QUEUE   0x2000
62: #define IFF_VNET_HDR    0x4000
63: #define IFF_TUN_EXCL    0x8000
64: 
65: /* Features for GSO (TUNSETOFFLOAD). */
66: #define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
67: #define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
68: #define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
69: #define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
70: #define TUN_F_UFO       0x10    /* I can handle UFO packets */
71: 
72: /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
73: #define TUN_PKT_STRIP   0x0001
74: struct tun_pi {
75:         __u16  flags;
76:         __be16 proto;
77: };
78: 
79: /*
80:  * Filter spec (used for SETXXFILTER ioctls)
81:  * This stuff is applicable only to the TAP (Ethernet) devices.
82:  * If the count is zero the filter is disabled and the driver accepts
83:  * all packets (promisc mode).
84:  * If the filter is enabled in order to accept broadcast packets
85:  * broadcast addr must be explicitly included in the addr list.
86:  */
87: #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
88: struct tun_filter {
89:         __u16  flags; /* TUN_FLT_ flags see above */
90:         __u16  count; /* Number of addresses */
91:         __u8   addr[0][ETH_ALEN];
92: };
93: 
94: #endif /* __IF_TUN_H */
95: 

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