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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef	_INET_IPTUN_H
     27 #define	_INET_IPTUN_H
     28 
     29 #include <sys/socket.h>
     30 #include <sys/types.h>
     31 #include <sys/dld_ioc.h>
     32 #include <netinet/in.h>
     33 #include <netinet/ip6.h>
     34 
     35 #ifdef	__cplusplus
     36 extern "C" {
     37 #endif
     38 
     39 /*
     40  * from http://www.iana.org/assignments/ip-parameters
     41  */
     42 #define	IPTUN_DEFAULT_HOPLIMIT		64
     43 /* from RFC 2473 */
     44 #define	IPTUN_DEFAULT_ENCAPLIMIT	4
     45 
     46 #define	IPTUN_CREATE		IPTUNIOC(1)
     47 #define	IPTUN_DELETE		IPTUNIOC(2)
     48 #define	IPTUN_MODIFY		IPTUNIOC(3)
     49 #define	IPTUN_INFO		IPTUNIOC(4)
     50 #define	IPTUN_SET_6TO4RELAY	IPTUNIOC(9)
     51 #define	IPTUN_GET_6TO4RELAY	IPTUNIOC(10)
     52 
     53 typedef enum {
     54 	IPTUN_TYPE_UNKNOWN = 0,
     55 	IPTUN_TYPE_IPV4,
     56 	IPTUN_TYPE_IPV6,
     57 	IPTUN_TYPE_6TO4
     58 } iptun_type_t;
     59 
     60 /*
     61  * To maintain proper alignment of fields between 32bit user-land and 64bit
     62  * kernel, all fields in iptun_kparams_t after itk_fields must be in
     63  * descending order of size.  Due to strict structure size checks done in the
     64  * iptun ioctl processing, the structure size must be the same on 32 and 64
     65  * bit.  amd64 will pad the end of the structure to make the end 64bit
     66  * aligned, so we must add explicit padding to make sure that it's similarly
     67  * aligned when compiled in 32 bit mode.
     68  */
     69 typedef struct iptun_kparams {
     70 	datalink_id_t		iptun_kparam_linkid;
     71 	uint32_t		iptun_kparam_flags;
     72 	struct sockaddr_storage	iptun_kparam_laddr;	/* local address */
     73 	struct sockaddr_storage	iptun_kparam_raddr;	/* remote address */
     74 	ipsec_req_t		iptun_kparam_secinfo;
     75 	iptun_type_t		iptun_kparam_type;
     76 	uint32_t		_iptun_kparam_padding;
     77 } iptun_kparams_t;
     78 
     79 /* itk_flags */
     80 #define	IPTUN_KPARAM_TYPE	0x00000001 /* itk_type is set */
     81 #define	IPTUN_KPARAM_LADDR	0x00000002 /* itk_laddr is set */
     82 #define	IPTUN_KPARAM_RADDR	0x00000004 /* itk_raddr is set */
     83 #define	IPTUN_KPARAM_SECINFO	0x00000008 /* itk_secinfo is set */
     84 #define	IPTUN_KPARAM_IMPLICIT	0x00000010 /* implicitly created IP tunnel */
     85 #define	IPTUN_KPARAM_IPSECPOL	0x00000020 /* ipsecconf(1M) policy present */
     86 
     87 #ifdef	__cplusplus
     88 }
     89 #endif
     90 
     91 #endif	/* _INET_IPTUN_H */
     92