The Tor Browser / file revision

 /*-

  * Copyright (c) 1982, 1986, 1993

  *	The Regents of the University of California.  All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  * 4. Neither the name of the University nor the names of its contributors

  *    may be used to endorse or promote products derived from this software

  *    without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  *

  */

 #ifndef _USER_IP_ICMP_H_

 #define _USER_IP_ICMP_H_

 /*

  * Interface Control Message Protocol Definitions.

  * Per RFC 792, September 1981.

  */

 /*

  * Internal of an ICMP Router Advertisement

  */

 struct icmp_ra_addr {

 	u_int32_t ira_addr;

 	u_int32_t ira_preference;

 };

 /*

  * Structure of an icmp header.

  */

 struct icmphdr {

 	u_char	icmp_type;		/* type of message, see below */

 	u_char	icmp_code;		/* type sub code */

 	u_short	icmp_cksum;		/* ones complement cksum of struct */

 };

 #if defined(__Userspace_os_Windows)

 struct icmp6_hdr {

 	u_int8_t icmp6_type;

 	u_int8_t icmp6_code;

 	u_int16_t icmp6_cksum;

 	union {

 		u_int32_t icmp6_un_data32[1];

 		u_int16_t icmp6_un_data16[2];

 		u_int8_t icmp6_un_data8[4];

 	} icmp6_dataun;

 } __packed;

 #define icmp6_data32 icmp6_dataun.icmp6_un_data32

 #define icmp6_mtu icmp6_data32[0]

 #endif

 /*

  * Structure of an icmp packet.

  *

  * XXX: should start with a struct icmphdr.

  */

 struct icmp {

 	u_char	icmp_type;		/* type of message, see below */

 	u_char	icmp_code;		/* type sub code */

 	u_short	icmp_cksum;		/* ones complement cksum of struct */

 	union {

 		u_char ih_pptr;			/* ICMP_PARAMPROB */

 		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */

 		struct ih_idseq {

 			uint16_t	icd_id;	/* network format */

 			uint16_t	icd_seq; /* network format */

 		} ih_idseq;

 		int ih_void;

 		/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */

 		struct ih_pmtu {

 			uint16_t ipm_void;	/* network format */

 			uint16_t ipm_nextmtu;	/* network format */

 		} ih_pmtu;

 		struct ih_rtradv {

 			u_char irt_num_addrs;

 			u_char irt_wpa;

 			u_int16_t irt_lifetime;

 		} ih_rtradv;

 	} icmp_hun;

 #define	icmp_pptr	icmp_hun.ih_pptr

 #define	icmp_gwaddr	icmp_hun.ih_gwaddr

 #define	icmp_id		icmp_hun.ih_idseq.icd_id

 #define	icmp_seq	icmp_hun.ih_idseq.icd_seq

 #define	icmp_void	icmp_hun.ih_void

 #define	icmp_pmvoid	icmp_hun.ih_pmtu.ipm_void

 #define	icmp_nextmtu	icmp_hun.ih_pmtu.ipm_nextmtu

 #define	icmp_num_addrs	icmp_hun.ih_rtradv.irt_num_addrs

 #define	icmp_wpa	icmp_hun.ih_rtradv.irt_wpa

 #define	icmp_lifetime	icmp_hun.ih_rtradv.irt_lifetime

 	union {

 		struct id_ts {			/* ICMP Timestamp */

 			/*

 			 * The next 3 fields are in network format,

 			 * milliseconds since 00:00 GMT

 			 */

 			uint32_t its_otime;	/* Originate */

 			uint32_t its_rtime;	/* Receive */

 			uint32_t its_ttime;	/* Transmit */

 		} id_ts;

 		struct id_ip  {

 			struct ip idi_ip;

 			/* options and then 64 bits of data */

 		} id_ip;

 		struct icmp_ra_addr id_radv;

 		u_int32_t id_mask;

 		char	id_data[1];

 	} icmp_dun;

 #define	icmp_otime	icmp_dun.id_ts.its_otime

 #define	icmp_rtime	icmp_dun.id_ts.its_rtime

 #define	icmp_ttime	icmp_dun.id_ts.its_ttime

 #define	icmp_ip		icmp_dun.id_ip.idi_ip

 #define	icmp_radv	icmp_dun.id_radv

 #define	icmp_mask	icmp_dun.id_mask

 #define	icmp_data	icmp_dun.id_data

 };

 /*

  * Lower bounds on packet lengths for various types.

  * For the error advice packets must first insure that the

  * packet is large enough to contain the returned ip header.

  * Only then can we do the check to see if 64 bits of packet

  * data have been returned, since we need to check the returned

  * ip header length.

  */

 #define	ICMP_MINLEN	8				/* abs minimum */

 #define	ICMP_TSLEN	(8 + 3 * sizeof (uint32_t))	/* timestamp */

 #define	ICMP_MASKLEN	12				/* address mask */

 #define	ICMP_ADVLENMIN	(8 + sizeof (struct ip) + 8)	/* min */

 #define	ICMP_ADVLEN(p)	(8 + ((p)->icmp_ip.ip_hl << 2) + 8)

 	/* N.B.: must separately check that ip_hl >= 5 */

 /*

  * Definition of type and code field values.

  */

 #define	ICMP_ECHOREPLY		0		/* echo reply */

 #define	ICMP_UNREACH		3		/* dest unreachable, codes: */

 #define		ICMP_UNREACH_NET	0		/* bad net */

 #define		ICMP_UNREACH_HOST	1		/* bad host */

 #define		ICMP_UNREACH_PROTOCOL	2		/* bad protocol */

 #define		ICMP_UNREACH_PORT	3		/* bad port */

 #define		ICMP_UNREACH_NEEDFRAG	4		/* IP_DF caused drop */

 #define		ICMP_UNREACH_SRCFAIL	5		/* src route failed */

 #define		ICMP_UNREACH_NET_UNKNOWN 6		/* unknown net */

 #define		ICMP_UNREACH_HOST_UNKNOWN 7		/* unknown host */

 #define		ICMP_UNREACH_ISOLATED	8		/* src host isolated */

 #define		ICMP_UNREACH_NET_PROHIB	9		/* prohibited access */

 #define		ICMP_UNREACH_HOST_PROHIB 10		/* ditto */

 #define		ICMP_UNREACH_TOSNET	11		/* bad tos for net */

 #define		ICMP_UNREACH_TOSHOST	12		/* bad tos for host */

 #define		ICMP_UNREACH_FILTER_PROHIB 13		/* admin prohib */

 #define		ICMP_UNREACH_HOST_PRECEDENCE 14		/* host prec vio. */

 #define		ICMP_UNREACH_PRECEDENCE_CUTOFF 15	/* prec cutoff */

 #define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */

 #define	ICMP_REDIRECT		5		/* shorter route, codes: */

 #define		ICMP_REDIRECT_NET	0		/* for network */

 #define		ICMP_REDIRECT_HOST	1		/* for host */

 #define		ICMP_REDIRECT_TOSNET	2		/* for tos and net */

 #define		ICMP_REDIRECT_TOSHOST	3		/* for tos and host */

 #define	ICMP_ALTHOSTADDR	6		/* alternate host address */

 #define	ICMP_ECHO		8		/* echo service */

 #define	ICMP_ROUTERADVERT	9		/* router advertisement */

 #define		ICMP_ROUTERADVERT_NORMAL		0	/* normal advertisement */

 #define		ICMP_ROUTERADVERT_NOROUTE_COMMON	16	/* selective routing */

 #define	ICMP_ROUTERSOLICIT	10		/* router solicitation */

 #define	ICMP_TIMXCEED		11		/* time exceeded, code: */

 #define		ICMP_TIMXCEED_INTRANS	0		/* ttl==0 in transit */

 #define		ICMP_TIMXCEED_REASS	1		/* ttl==0 in reass */

 #define	ICMP_PARAMPROB		12		/* ip header bad */

 #define		ICMP_PARAMPROB_ERRATPTR 0		/* error at param ptr */

 #define		ICMP_PARAMPROB_OPTABSENT 1		/* req. opt. absent */

 #define		ICMP_PARAMPROB_LENGTH 2			/* bad length */

 #define	ICMP_TSTAMP		13		/* timestamp request */

 #define	ICMP_TSTAMPREPLY	14		/* timestamp reply */

 #define	ICMP_IREQ		15		/* information request */

 #define	ICMP_IREQREPLY		16		/* information reply */

 #define	ICMP_MASKREQ		17		/* address mask request */

 #define	ICMP_MASKREPLY		18		/* address mask reply */

 #define	ICMP_TRACEROUTE		30		/* traceroute */

 #define	ICMP_DATACONVERR	31		/* data conversion error */

 #define	ICMP_MOBILE_REDIRECT	32		/* mobile host redirect */

 #define	ICMP_IPV6_WHEREAREYOU	33		/* IPv6 where-are-you */

 #define	ICMP_IPV6_IAMHERE	34		/* IPv6 i-am-here */

 #define	ICMP_MOBILE_REGREQUEST	35		/* mobile registration req */

 #define	ICMP_MOBILE_REGREPLY	36		/* mobile registration reply */

 #define	ICMP_SKIP		39		/* SKIP */

 #define	ICMP_PHOTURIS		40		/* Photuris */

 #define		ICMP_PHOTURIS_UNKNOWN_INDEX	1	/* unknown sec index */

 #define		ICMP_PHOTURIS_AUTH_FAILED	2	/* auth failed */

 #define		ICMP_PHOTURIS_DECRYPT_FAILED	3	/* decrypt failed */

 #define	ICMP_MAXTYPE		40

 #define	ICMP_INFOTYPE(type) \

 	((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \

 	(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \

 	(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \

 	(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \

 	(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)

 #endif