1 /* 2 * Universal TUN/TAP device driver. 3 * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk (at) 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 __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
