[unix-history] / sys / sys / protosw.h

/*-
 * Copyright (c) 1982, 1986 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 *
 *	from: @(#)protosw.h	7.8 (Berkeley) 4/28/91
 *	$Id: protosw.h,v 1.4 1993/11/18 00:12:34 wollman Exp $
 */

#ifndef _SYS_PROTOSW_H_
#define _SYS_PROTOSW_H_ 1

struct mbuf;			/* forward declarations */
struct socket;

/*
 * Protocol switch table.
 *
 * Each protocol has a handle initializing one of these structures,
 * which is used for protocol-protocol and system-protocol communication.
 *
 * A protocol is called through the pr_init entry before any other.
 * Thereafter it is called every 200ms through the pr_fasttimo entry and
 * every 500ms through the pr_slowtimo for timer based actions.
 * The system will call the pr_drain entry if it is low on space and
 * this should throw away any non-critical data.
 *
 * Protocols pass data between themselves as chains of mbufs using
 * the pr_input and pr_output hooks.  Pr_input passes data up (towards
 * UNIX) and pr_output passes it down (towards the interfaces); control
 * information passes up and down on pr_ctlinput and pr_ctloutput.
 * The protocol is responsible for the space occupied by any the
 * arguments to these entries and must dispose it.
 *
 * The userreq routine interfaces protocols to the system and is
 * described below.
 *
 * Beware that protocol families may make puns of this structure with
 * pr_{ctl,}{in,out}put routines having prototypes appropriate for that
 * protocol's conventions.  (See, for example, netinet/in_var.h.)
 */
struct protosw {
	short	pr_type;		/* socket type used for */
	struct	domain *pr_domain;	/* domain protocol a member of */
	short	pr_protocol;		/* protocol number */
	short	pr_flags;		/* see below */
/* protocol-protocol hooks */
	int	(*pr_input)();		/* input to protocol (from below) */
	int	(*pr_output)();		/* output to protocol (from above) */
	void	(*pr_ctlinput)();	/* control input (from below) */
	int	(*pr_ctloutput)(int, struct socket *, int, int, 
				struct mbuf **);
				/* control output (from above) */
/* user-protocol hook */
	int	(*pr_usrreq)(struct socket *, int, struct mbuf *, 
			     struct mbuf *, struct mbuf *, struct mbuf *);
				/* user request: see list below */
/* utility hooks */
	void	(*pr_init)(void); /* initialization hook */
	void	(*pr_fasttimo)(void); /* fast timeout (200ms) */
	void	(*pr_slowtimo)(void); /* slow timeout (500ms) */
	void	(*pr_drain)(void); /* flush any excess space possible */
};

#define	PR_SLOWHZ	2		/* 2 slow timeouts per second */
#define	PR_FASTHZ	5		/* 5 fast timeouts per second */

/*
 * Values for pr_flags.
 * PR_ADDR requires PR_ATOMIC;
 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
 */
#define	PR_ATOMIC	0x01		/* exchange atomic messages only */
#define	PR_ADDR		0x02		/* addresses given with messages */
#define	PR_CONNREQUIRED	0x04		/* connection required by protocol */
#define	PR_WANTRCVD	0x08		/* want PRU_RCVD calls */
#define	PR_RIGHTS	0x10		/* passes capabilities */

/*
 * The arguments to usrreq are:
 *	(*protosw[].pr_usrreq)(up, req, m, nam, opt);
 * where up is a (struct socket *), req is one of these requests,
 * m is a optional mbuf chain containing a message,
 * nam is an optional mbuf chain containing an address,
 * and opt is a pointer to a socketopt structure or nil.
 * The protocol is responsible for disposal of the mbuf chain m,
 * the caller is responsible for any space held by nam and opt.
 * A non-zero return from usrreq gives an
 * UNIX error number which should be passed to higher level software.
 */
#define	PRU_ATTACH		0	/* attach protocol to up */
#define	PRU_DETACH		1	/* detach protocol from up */
#define	PRU_BIND		2	/* bind socket to address */
#define	PRU_LISTEN		3	/* listen for connection */
#define	PRU_CONNECT		4	/* establish connection to peer */
#define	PRU_ACCEPT		5	/* accept connection from peer */
#define	PRU_DISCONNECT		6	/* disconnect from peer */
#define	PRU_SHUTDOWN		7	/* won't send any more data */
#define	PRU_RCVD		8	/* have taken data; more room now */
#define	PRU_SEND		9	/* send this data */
#define	PRU_ABORT		10	/* abort (fast DISCONNECT, DETATCH) */
#define	PRU_CONTROL		11	/* control operations on protocol */
#define	PRU_SENSE		12	/* return status into m */
#define	PRU_RCVOOB		13	/* retrieve out of band data */
#define	PRU_SENDOOB		14	/* send out of band data */
#define	PRU_SOCKADDR		15	/* fetch socket's address */
#define	PRU_PEERADDR		16	/* fetch peer's address */
#define	PRU_CONNECT2		17	/* connect two sockets */
/* begin for protocols internal use */
#define	PRU_FASTTIMO		18	/* 200ms timeout */
#define	PRU_SLOWTIMO		19	/* 500ms timeout */
#define	PRU_PROTORCV		20	/* receive from below */
#define	PRU_PROTOSEND		21	/* send to below */

#define	PRU_NREQ		21

#ifdef PRUREQUESTS
char *prurequests[] = {
	"ATTACH",	"DETACH",	"BIND",		"LISTEN",
	"CONNECT",	"ACCEPT",	"DISCONNECT",	"SHUTDOWN",
	"RCVD",		"SEND",		"ABORT",	"CONTROL",
	"SENSE",	"RCVOOB",	"SENDOOB",	"SOCKADDR",
	"PEERADDR",	"CONNECT2",	"FASTTIMO",	"SLOWTIMO",
	"PROTORCV",	"PROTOSEND",
};
#endif

/*
 * The arguments to the ctlinput routine are
 *	(*protosw[].pr_ctlinput)(cmd, sa, arg);
 * where cmd is one of the commands below, sa is a pointer to a sockaddr,
 * and arg is an optional caddr_t argument used within a protocol family.
 */
#define	PRC_IFDOWN		0	/* interface transition */
#define	PRC_ROUTEDEAD		1	/* select new route if possible ??? */
#define	PRC_QUENCH2		3	/* DEC congestion bit says slow down */
#define	PRC_QUENCH		4	/* some one said to slow down */
#define	PRC_MSGSIZE		5	/* message size forced drop */
#define	PRC_HOSTDEAD		6	/* host appears to be down */
#define	PRC_HOSTUNREACH		7	/* deprecated (use PRC_UNREACH_HOST) */
#define	PRC_UNREACH_NET		8	/* no route to network */
#define	PRC_UNREACH_HOST	9	/* no route to host */
#define	PRC_UNREACH_PROTOCOL	10	/* dst says bad protocol */
#define	PRC_UNREACH_PORT	11	/* bad port # */
/* was	PRC_UNREACH_NEEDFRAG	12	   (use PRC_MSGSIZE) */
#define	PRC_UNREACH_SRCFAIL	13	/* source route failed */
#define PRC_UNREACH_NETUNKNOWN	14	/* network unknown */
#define PRC_UNREACH_HOSTUNKNOWN	15	/* host unknown */
#define PRC_UNREACH_ISOLATED	16	/* source host is isolated */
#define PRC_UNREACH_NETADMIN	17	/* communication administratively */
#define PRC_UNREACH_HOSTADMIN	18	/* prohibited with net/host */
#define PRC_UNREACH_TOSNET	19	/* net unreachable with this TOS */
#define PRC_UNREACH_TOSHOST	20	/* host unreachable with this TOS */

#define	PRC_REDIRECT_NET	21	/* net routing redirect */
#define	PRC_REDIRECT_HOST	22	/* host routing redirect */
#define	PRC_REDIRECT_TOSNET	23	/* redirect for type of service & net */
#define	PRC_REDIRECT_TOSHOST	24	/* redirect for tos & host */
#define	PRC_TIMXCEED_INTRANS	25	/* packet lifetime expired in transit */
#define	PRC_TIMXCEED_REASS	26	/* lifetime expired on reass q */
#define	PRC_PARAMPROB		27	/* header incorrect */
#define PRC_OPTION_MISSING	28	/* required option missing */
#define PRC_MTUCHANGED		29	/* lower layer MTU has changed */

#define	PRC_NCMDS		30

#define	PRC_IS_REDIRECT(cmd)	\
	((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
#define PRC_IS_UNREACH(cmd)	\
	((cmd) >= PRC_UNREACH_NET && (cmd) <= PRC_UNREACH_TOSHOST)

#ifdef PRCREQUESTS
char	*prcrequests[] = {
	"IFDOWN", "ROUTEDEAD", "#2", "DEC-BIT-QUENCH2",
	"QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
	"NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
	"#12", "SRCFAIL-UNREACH", "NET-UNKNOWN", "HOST-UNKNOWN",
	"HOST-ISOLATED", "NET-ADMIN-UNREACH", "HOST-ADMIN-UNREACH",
	"TOSNET-UNREACH", "TOSHOST-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
	"TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
	"PARAMPROB", "OPTION-MISSING", "MTU-CHANGED"
};
#endif

/*
 * The arguments to ctloutput are:
 *	(*protosw[].pr_ctloutput)(req, so, level, optname, optval);
 * req is one of the actions listed below, so is a (struct socket *),
 * level is an indication of which protocol layer the option is intended.
 * optname is a protocol dependent socket option request,
 * optval is a pointer to a mbuf-chain pointer, for value-return results.
 * The protocol is responsible for disposal of the mbuf chain *optval
 * if supplied,
 * the caller is responsible for any space held by *optval, when returned.
 * A non-zero return from usrreq gives an
 * UNIX error number which should be passed to higher level software.
 */
#define	PRCO_GETOPT	0
#define	PRCO_SETOPT	1

#define	PRCO_NCMDS	2

#ifdef PRCOREQUESTS
char	*prcorequests[] = {
	"GETOPT", "SETOPT",
};
#endif

#ifdef KERNEL
extern void domaininit(void);
extern struct protosw *pffindtype(int, int);
extern struct protosw *pffindproto(int, int, int);
struct sockaddr;
extern void pfctlinput(int, struct sockaddr *);
#endif /* KERNEL */
#endif /* _SYS_PROTOSW_H_ */
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1982, 1986 The Regents of the University of California.
	3	* 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.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
01e1b05c	33	* from: @(#)protosw.h 7.8 (Berkeley) 4/28/91
fde1aeb2	34	* $Id: protosw.h,v 1.4 1993/11/18 00:12:34 wollman Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
bcdc7290 GW	37	#ifndef _SYS_PROTOSW_H_
	38	#define _SYS_PROTOSW_H_ 1
	39
fde1aeb2 GW	40	struct mbuf; /* forward declarations */
	41	struct socket;
	42
15637ed4 RG	43	/*
	44	* Protocol switch table.
	45	*
	46	* Each protocol has a handle initializing one of these structures,
	47	* which is used for protocol-protocol and system-protocol communication.
	48	*
	49	* A protocol is called through the pr_init entry before any other.
	50	* Thereafter it is called every 200ms through the pr_fasttimo entry and
	51	* every 500ms through the pr_slowtimo for timer based actions.
	52	* The system will call the pr_drain entry if it is low on space and
	53	* this should throw away any non-critical data.
	54	*
	55	* Protocols pass data between themselves as chains of mbufs using
	56	* the pr_input and pr_output hooks. Pr_input passes data up (towards
fde1aeb2	57	* UNIX) and pr_output passes it down (towards the interfaces); control
15637ed4 RG	58	* information passes up and down on pr_ctlinput and pr_ctloutput.
	59	* The protocol is responsible for the space occupied by any the
	60	* arguments to these entries and must dispose it.
	61	*
	62	* The userreq routine interfaces protocols to the system and is
	63	* described below.
fde1aeb2 GW	64	*
	65	* Beware that protocol families may make puns of this structure with
	66	* pr_{ctl,}{in,out}put routines having prototypes appropriate for that
	67	* protocol's conventions. (See, for example, netinet/in_var.h.)
15637ed4 RG	68	*/
	69	struct protosw {
	70	short pr_type; /* socket type used for */
	71	struct domain pr_domain; / domain protocol a member of */
	72	short pr_protocol; /* protocol number */
	73	short pr_flags; /* see below */
	74	/* protocol-protocol hooks */
	75	int (pr_input)(); / input to protocol (from below) */
	76	int (pr_output)(); / output to protocol (from above) */
fde1aeb2 GW	77	void (pr_ctlinput)(); / control input (from below) */
	78	int (pr_ctloutput)(int, struct socket , int, int,
	79	struct mbuf **);
	80	/* control output (from above) */
15637ed4	81	/* user-protocol hook */
fde1aeb2 GW	82	int (pr_usrreq)(struct socket , int, struct mbuf *,
	83	struct mbuf , struct mbuf , struct mbuf *);
	84	/* user request: see list below */
15637ed4	85	/* utility hooks */
fde1aeb2 GW	86	void (pr_init)(void); / initialization hook */
	87	void (pr_fasttimo)(void); / fast timeout (200ms) */
	88	void (pr_slowtimo)(void); / slow timeout (500ms) */
	89	void (pr_drain)(void); / flush any excess space possible */
15637ed4 RG	90	};
	91
	92	#define PR_SLOWHZ 2 /* 2 slow timeouts per second */
	93	#define PR_FASTHZ 5 /* 5 fast timeouts per second */
	94
	95	/*
	96	* Values for pr_flags.
	97	* PR_ADDR requires PR_ATOMIC;
	98	* PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
	99	*/
	100	#define PR_ATOMIC 0x01 /* exchange atomic messages only */
	101	#define PR_ADDR 0x02 /* addresses given with messages */
	102	#define PR_CONNREQUIRED 0x04 /* connection required by protocol */
	103	#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
	104	#define PR_RIGHTS 0x10 /* passes capabilities */
	105
	106	/*
	107	* The arguments to usrreq are:
	108	* (*protosw[].pr_usrreq)(up, req, m, nam, opt);
	109	* where up is a (struct socket *), req is one of these requests,
	110	* m is a optional mbuf chain containing a message,
	111	* nam is an optional mbuf chain containing an address,
	112	* and opt is a pointer to a socketopt structure or nil.
	113	* The protocol is responsible for disposal of the mbuf chain m,
	114	* the caller is responsible for any space held by nam and opt.
	115	* A non-zero return from usrreq gives an
	116	* UNIX error number which should be passed to higher level software.
	117	*/
	118	#define PRU_ATTACH 0 /* attach protocol to up */
	119	#define PRU_DETACH 1 /* detach protocol from up */
	120	#define PRU_BIND 2 /* bind socket to address */
	121	#define PRU_LISTEN 3 /* listen for connection */
	122	#define PRU_CONNECT 4 /* establish connection to peer */
	123	#define PRU_ACCEPT 5 /* accept connection from peer */
	124	#define PRU_DISCONNECT 6 /* disconnect from peer */
	125	#define PRU_SHUTDOWN 7 /* won't send any more data */
	126	#define PRU_RCVD 8 /* have taken data; more room now */
	127	#define PRU_SEND 9 /* send this data */
	128	#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
	129	#define PRU_CONTROL 11 /* control operations on protocol */
	130	#define PRU_SENSE 12 /* return status into m */
	131	#define PRU_RCVOOB 13 /* retrieve out of band data */
	132	#define PRU_SENDOOB 14 /* send out of band data */
	133	#define PRU_SOCKADDR 15 /* fetch socket's address */
	134	#define PRU_PEERADDR 16 /* fetch peer's address */
	135	#define PRU_CONNECT2 17 /* connect two sockets */
	136	/* begin for protocols internal use */
	137	#define PRU_FASTTIMO 18 /* 200ms timeout */
	138	#define PRU_SLOWTIMO 19 /* 500ms timeout */
	139	#define PRU_PROTORCV 20 /* receive from below */
	140	#define PRU_PROTOSEND 21 /* send to below */
	141
	142	#define PRU_NREQ 21
	143
	144	#ifdef PRUREQUESTS
	145	char *prurequests[] = {
	146	"ATTACH", "DETACH", "BIND", "LISTEN",
	147	"CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
	148	"RCVD", "SEND", "ABORT", "CONTROL",
	149	"SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
	150	"PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
	151	"PROTORCV", "PROTOSEND",
	152	};
	153	#endif
154
155	/*
156	* The arguments to the ctlinput routine are
157	* (*protosw[].pr_ctlinput)(cmd, sa, arg);
158	* where cmd is one of the commands below, sa is a pointer to a sockaddr,
159	* and arg is an optional caddr_t argument used within a protocol family.
160	*/
161	#define PRC_IFDOWN 0 /* interface transition */
162	#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
163	#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
164	#define PRC_QUENCH 4 /* some one said to slow down */
165	#define PRC_MSGSIZE 5 /* message size forced drop */
166	#define PRC_HOSTDEAD 6 /* host appears to be down */
167	#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
168	#define PRC_UNREACH_NET 8 /* no route to network */
169	#define PRC_UNREACH_HOST 9 /* no route to host */
170	#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
171	#define PRC_UNREACH_PORT 11 /* bad port # */
172	/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
173	#define PRC_UNREACH_SRCFAIL 13 /* source route failed */
ed36ec52 GW	174	#define PRC_UNREACH_NETUNKNOWN 14 /* network unknown */
	175	#define PRC_UNREACH_HOSTUNKNOWN 15 /* host unknown */
	176	#define PRC_UNREACH_ISOLATED 16 /* source host is isolated */
	177	#define PRC_UNREACH_NETADMIN 17 /* communication administratively */
	178	#define PRC_UNREACH_HOSTADMIN 18 /* prohibited with net/host */
	179	#define PRC_UNREACH_TOSNET 19 /* net unreachable with this TOS */
	180	#define PRC_UNREACH_TOSHOST 20 /* host unreachable with this TOS */
15637ed4	181
ed36ec52 GW	182	#define PRC_REDIRECT_NET 21 /* net routing redirect */
	183	#define PRC_REDIRECT_HOST 22 /* host routing redirect */
	184	#define PRC_REDIRECT_TOSNET 23 /* redirect for type of service & net */
	185	#define PRC_REDIRECT_TOSHOST 24 /* redirect for tos & host */
	186	#define PRC_TIMXCEED_INTRANS 25 /* packet lifetime expired in transit */
	187	#define PRC_TIMXCEED_REASS 26 /* lifetime expired on reass q */
	188	#define PRC_PARAMPROB 27 /* header incorrect */
	189	#define PRC_OPTION_MISSING 28 /* required option missing */
	190	#define PRC_MTUCHANGED 29 /* lower layer MTU has changed */
	191
	192	#define PRC_NCMDS 30
15637ed4 RG	193
	194	#define PRC_IS_REDIRECT(cmd) \
	195	((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
ed36ec52 GW	196	#define PRC_IS_UNREACH(cmd) \
ed36ec52 GW	197	((cmd) >= PRC_UNREACH_NET && (cmd) <= PRC_UNREACH_TOSHOST)
15637ed4 RG	198
	199	#ifdef PRCREQUESTS
	200	char *prcrequests[] = {
	201	"IFDOWN", "ROUTEDEAD", "#2", "DEC-BIT-QUENCH2",
	202	"QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
	203	"NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
ed36ec52 GW	204	"#12", "SRCFAIL-UNREACH", "NET-UNKNOWN", "HOST-UNKNOWN",
	205	"HOST-ISOLATED", "NET-ADMIN-UNREACH", "HOST-ADMIN-UNREACH",
	206	"TOSNET-UNREACH", "TOSHOST-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
15637ed4	207	"TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
ed36ec52	208	"PARAMPROB", "OPTION-MISSING", "MTU-CHANGED"
15637ed4 RG	209	};
	210	#endif
	211
	212	/*
	213	* The arguments to ctloutput are:
	214	* (*protosw[].pr_ctloutput)(req, so, level, optname, optval);
	215	* req is one of the actions listed below, so is a (struct socket *),
	216	* level is an indication of which protocol layer the option is intended.
	217	* optname is a protocol dependent socket option request,
	218	* optval is a pointer to a mbuf-chain pointer, for value-return results.
	219	* The protocol is responsible for disposal of the mbuf chain *optval
	220	* if supplied,
	221	* the caller is responsible for any space held by *optval, when returned.
	222	* A non-zero return from usrreq gives an
	223	* UNIX error number which should be passed to higher level software.
	224	*/
	225	#define PRCO_GETOPT 0
	226	#define PRCO_SETOPT 1
	227
	228	#define PRCO_NCMDS 2
	229
	230	#ifdef PRCOREQUESTS
	231	char *prcorequests[] = {
	232	"GETOPT", "SETOPT",
	233	};
	234	#endif
	235
	236	#ifdef KERNEL
fde1aeb2 GW	237	extern void domaininit(void);
	238	extern struct protosw *pffindtype(int, int);
	239	extern struct protosw *pffindproto(int, int, int);
	240	struct sockaddr;
	241	extern void pfctlinput(int, struct sockaddr *);
	242	#endif /* KERNEL */
bcdc7290	243	#endif /* _SYS_PROTOSW_H_ */