[qemu.git] / slirp / ip_icmp.h

/*
 * 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.
 * 3. 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.
 *
 *	@(#)ip_icmp.h	8.1 (Berkeley) 6/10/93
 * ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp
 */

#ifndef _NETINET_IP_ICMP_H_
#define _NETINET_IP_ICMP_H_

/*
 * Interface Control Message Protocol Definitions.
 * Per RFC 792, September 1981.
 */

typedef uint32_t n_time;

/*
 * Structure of an icmp header.
 */
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 {
			u_short	icd_id;
			u_short	icd_seq;
		} ih_idseq;
		int ih_void;

		/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
		struct ih_pmtu {
			u_short ipm_void;
			u_short ipm_nextmtu;
		} ih_pmtu;
	} 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
	union {
		struct id_ts {
			n_time its_otime;
			n_time its_rtime;
			n_time its_ttime;
		} id_ts;
		struct id_ip  {
			struct ip idi_ip;
			/* options and then 64 bits of data */
		} id_ip;
		uint32_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_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 ensure 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 (n_time))	/* 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_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_ECHO		8		/* echo service */
#define	ICMP_ROUTERADVERT	9		/* router advertisement */
#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_OPTABSENT 1		/* req. opt. absent */
#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_MAXTYPE		18

#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)

void icmp_init(Slirp *slirp);
void icmp_cleanup(Slirp *slirp);
void icmp_input(struct mbuf *, int);
void icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize,
                const char *message);
void icmp_reflect(struct mbuf *);
void icmp_receive(struct socket *so);
void icmp_detach(struct socket *so);

#endif
Commit	Line	Data
f0cbd3ec FB	1	/*
	2	* Copyright (c) 1982, 1986, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
2f5f8996	13	* 3. Neither the name of the University nor the names of its contributors
f0cbd3ec FB	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*
	29	* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
	30	* ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp
	31	*/
	32
	33	#ifndef _NETINET_IP_ICMP_H_
	34	#define _NETINET_IP_ICMP_H_
	35
	36	/*
	37	* Interface Control Message Protocol Definitions.
	38	* Per RFC 792, September 1981.
	39	*/
	40
b6dce92e	41	typedef uint32_t n_time;
f0cbd3ec FB	42
	43	/*
	44	* Structure of an icmp header.
	45	*/
	46	struct icmp {
	47	u_char icmp_type; /* type of message, see below */
	48	u_char icmp_code; /* type sub code */
	49	u_short icmp_cksum; /* ones complement cksum of struct */
	50	union {
	51	u_char ih_pptr; /* ICMP_PARAMPROB */
	52	struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
	53	struct ih_idseq {
	54	u_short icd_id;
	55	u_short icd_seq;
	56	} ih_idseq;
	57	int ih_void;
	58
	59	/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
	60	struct ih_pmtu {
	61	u_short ipm_void;
	62	u_short ipm_nextmtu;
	63	} ih_pmtu;
	64	} icmp_hun;
	65	#define icmp_pptr icmp_hun.ih_pptr
	66	#define icmp_gwaddr icmp_hun.ih_gwaddr
	67	#define icmp_id icmp_hun.ih_idseq.icd_id
	68	#define icmp_seq icmp_hun.ih_idseq.icd_seq
	69	#define icmp_void icmp_hun.ih_void
	70	#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
	71	#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
	72	union {
	73	struct id_ts {
	74	n_time its_otime;
	75	n_time its_rtime;
	76	n_time its_ttime;
	77	} id_ts;
	78	struct id_ip {
	79	struct ip idi_ip;
	80	/* options and then 64 bits of data */
	81	} id_ip;
101c5935 FB	82	uint32_t id_mask;
101c5935 FB	83	char id_data[1];
f0cbd3ec FB	84	} icmp_dun;
	85	#define icmp_otime icmp_dun.id_ts.its_otime
	86	#define icmp_rtime icmp_dun.id_ts.its_rtime
	87	#define icmp_ttime icmp_dun.id_ts.its_ttime
	88	#define icmp_ip icmp_dun.id_ip.idi_ip
	89	#define icmp_mask icmp_dun.id_mask
	90	#define icmp_data icmp_dun.id_data
	91	};
	92
	93	/*
	94	* Lower bounds on packet lengths for various types.
30daca5f SW	95	* For the error advice packets must first ensure that the
30daca5f SW	96	* packet is large enough to contain the returned ip header.
f0cbd3ec FB	97	* Only then can we do the check to see if 64 bits of packet
	98	* data have been returned, since we need to check the returned
	99	* ip header length.
	100	*/
	101	#define ICMP_MINLEN 8 /* abs minimum */
	102	#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
	103	#define ICMP_MASKLEN 12 /* address mask */
	104	#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
	105	#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
	106	/* N.B.: must separately check that ip_hl >= 5 */
	107
	108	/*
	109	* Definition of type and code field values.
	110	*/
	111	#define ICMP_ECHOREPLY 0 /* echo reply */
	112	#define ICMP_UNREACH 3 /* dest unreachable, codes: */
	113	#define ICMP_UNREACH_NET 0 /* bad net */
	114	#define ICMP_UNREACH_HOST 1 /* bad host */
	115	#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
	116	#define ICMP_UNREACH_PORT 3 /* bad port */
	117	#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
	118	#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
	119	#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
	120	#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
	121	#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
	122	#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
	123	#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
	124	#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
	125	#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
	126	#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
	127	#define ICMP_REDIRECT 5 /* shorter route, codes: */
	128	#define ICMP_REDIRECT_NET 0 /* for network */
	129	#define ICMP_REDIRECT_HOST 1 /* for host */
	130	#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
	131	#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
	132	#define ICMP_ECHO 8 /* echo service */
	133	#define ICMP_ROUTERADVERT 9 /* router advertisement */
	134	#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
	135	#define ICMP_TIMXCEED 11 /* time exceeded, code: */
	136	#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
	137	#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
	138	#define ICMP_PARAMPROB 12 /* ip header bad */
	139	#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
	140	#define ICMP_TSTAMP 13 /* timestamp request */
	141	#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
	142	#define ICMP_IREQ 15 /* information request */
	143	#define ICMP_IREQREPLY 16 /* information reply */
	144	#define ICMP_MASKREQ 17 /* address mask request */
	145	#define ICMP_MASKREPLY 18 /* address mask reply */
	146
	147	#define ICMP_MAXTYPE 18
	148
	149	#define ICMP_INFOTYPE(type) \
	150	((type) == ICMP_ECHOREPLY \|\| (type) == ICMP_ECHO \|\| \
	151	(type) == ICMP_ROUTERADVERT \|\| (type) == ICMP_ROUTERSOLICIT \|\| \
	152	(type) == ICMP_TSTAMP \|\| (type) == ICMP_TSTAMPREPLY \|\| \
	153	(type) == ICMP_IREQ \|\| (type) == ICMP_IREQREPLY \|\| \
	154	(type) == ICMP_MASKREQ \|\| (type) == ICMP_MASKREPLY)
	155
e6d43cfb	156	void icmp_init(Slirp *slirp);
a68adc22	157	void icmp_cleanup(Slirp *slirp);
6cb9c6d3	158	void icmp_input(struct mbuf *, int);
7ccfb2eb BS	159	void icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize,
7ccfb2eb BS	160	const char *message);
6cb9c6d3	161	void icmp_reflect(struct mbuf *);
e6d43cfb JK	162	void icmp_receive(struct socket *so);
e6d43cfb JK	163	void icmp_detach(struct socket *so);
f0cbd3ec FB	164
f0cbd3ec FB	165	#endif