[apple/libinfo.git] / rpc.subproj / svc.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

#if defined(LIBC_SCCS) && !defined(lint) 
/*static char *sccsid = "from: @(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)svc.c	2.4 88/08/11 4.0 RPCSRC";*/
static char *rcsid = "$Id: svc.c,v 1.4 2002/02/19 20:36:24 epeyton Exp $";
#endif

/*
 * svc.c, Server-side remote procedure call interface.
 *
 * There are two sets of procedures here.  The xprt routines are
 * for handling transport handles.  The svc routines handle the
 * list of service routines.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include <stdlib.h>
#include <string.h>
#include <sys/errno.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>

extern int errno;

static SVCXPRT **xports;

#define NULL_SVC ((struct svc_callout *)0)
#define	RQCRED_SIZE	400		/* this size is excessive */

#define max(a, b) (a > b ? a : b)

/*
 * The services list
 * Each entry represents a set of procedures (an rpc program).
 * The dispatch routine takes request structs and runs the
 * apropriate procedure.
 */
static struct svc_callout {
	struct svc_callout *sc_next;
#ifdef __LP64__
	uint32_t		    sc_prog;
	uint32_t		    sc_vers;
#else
	u_long		    sc_prog;
	u_long		    sc_vers;
#endif
	void		    (*sc_dispatch)();
} *svc_head;

static struct svc_callout *svc_find();

/* ***************  SVCXPRT related stuff **************** */

extern int svc_maxfd;

/*
 * Activate a transport handle.
 */
void
xprt_register(xprt)
	SVCXPRT *xprt;
{
	register int sock = xprt->xp_sock;

	if (xports == NULL) {
		xports = (SVCXPRT **)
			mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
	}
	if (sock < FD_SETSIZE) {
		xports[sock] = xprt;
		FD_SET(sock, &svc_fdset);
		svc_maxfd = max(svc_maxfd, sock);
	}
}

/*
 * De-activate a transport handle. 
 */
void
xprt_unregister(xprt) 
	SVCXPRT *xprt;
{ 
	register int sock = xprt->xp_sock;

	if ((sock < FD_SETSIZE) && (xports[sock] == xprt)) {
		xports[sock] = (SVCXPRT *)0;
		FD_CLR(sock, &svc_fdset);
		if (sock == svc_maxfd) {
			for (svc_maxfd--; svc_maxfd>=0; svc_maxfd--)
				if (xports[svc_maxfd])
					break;
		}
	}
}


/* ********************** CALLOUT list related stuff ************* */

/*
 * Add a service program to the callout list.
 * The dispatch routine will be called when a rpc request for this
 * program number comes in.
 */
bool_t
svc_register(xprt, prog, vers, dispatch, protocol)
#ifdef __LP64__
	SVCXPRT *xprt;
	uint32_t prog;
	uint32_t vers;
	void (*dispatch)();
	int32_t protocol;
#else
	SVCXPRT *xprt;
	u_long prog;
	u_long vers;
	void (*dispatch)();
	int protocol;
#endif
{
	struct svc_callout *prev;
	register struct svc_callout *s;

	if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
		if (s->sc_dispatch == dispatch)
			goto pmap_it;  /* he is registering another xptr */
		return (FALSE);
	}
	s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
	if (s == (struct svc_callout *)0) {
		return (FALSE);
	}
	s->sc_prog = prog;
	s->sc_vers = vers;
	s->sc_dispatch = dispatch;
	s->sc_next = svc_head;
	svc_head = s;
pmap_it:
	/* now register the information with the local binder service */
	if (protocol) {
		return (pmap_set(prog, vers, protocol, xprt->xp_port));
	}
	return (TRUE);
}

/*
 * Remove a service program from the callout list.
 */
void
svc_unregister(prog, vers)
#ifdef __LP64__
	uint32_t prog;
	uint32_t vers;
#else
	u_long prog;
	u_long vers;
#endif
{
	struct svc_callout *prev;
	register struct svc_callout *s;

	if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
		return;
	if (prev == NULL_SVC) {
		svc_head = s->sc_next;
	} else {
		prev->sc_next = s->sc_next;
	}
	s->sc_next = NULL_SVC;
	mem_free((char *) s, (u_int) sizeof(struct svc_callout));
	/* now unregister the information with the local binder service */
	(void)pmap_unset(prog, vers);
}

/*
 * Search the callout list for a program number, return the callout
 * struct.
 */
static struct svc_callout *
svc_find(prog, vers, prev)
#ifdef __LP64__
	uint32_t prog;
	uint32_t vers;
#else
	u_long prog;
	u_long vers;
#endif
	struct svc_callout **prev;
{
	register struct svc_callout *s, *p;

	p = NULL_SVC;
	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
		if ((s->sc_prog == prog) && (s->sc_vers == vers))
			goto done;
		p = s;
	}
done:
	*prev = p;
	return (s);
}

/* ******************* REPLY GENERATION ROUTINES  ************ */

/*
 * Send a reply to an rpc request
 */
bool_t
svc_sendreply(xprt, xdr_results, xdr_location)
	register SVCXPRT *xprt;
	xdrproc_t xdr_results;
	caddr_t xdr_location;
{
	struct rpc_msg rply; 

	rply.rm_direction = REPLY;  
	rply.rm_reply.rp_stat = MSG_ACCEPTED; 
	rply.acpted_rply.ar_verf = xprt->xp_verf; 
	rply.acpted_rply.ar_stat = SUCCESS;
	rply.acpted_rply.ar_results.where = xdr_location;
	rply.acpted_rply.ar_results.proc = xdr_results;
	return (SVC_REPLY(xprt, &rply)); 
}

/*
 * No procedure error reply
 */
void
svcerr_noproc(xprt)
	register SVCXPRT *xprt;
{
	struct rpc_msg rply;

	rply.rm_direction = REPLY;
	rply.rm_reply.rp_stat = MSG_ACCEPTED;
	rply.acpted_rply.ar_verf = xprt->xp_verf;
	rply.acpted_rply.ar_stat = PROC_UNAVAIL;
	SVC_REPLY(xprt, &rply);
}

/*
 * Can't decode args error reply
 */
void
svcerr_decode(xprt)
	register SVCXPRT *xprt;
{
	struct rpc_msg rply; 

	rply.rm_direction = REPLY; 
	rply.rm_reply.rp_stat = MSG_ACCEPTED; 
	rply.acpted_rply.ar_verf = xprt->xp_verf;
	rply.acpted_rply.ar_stat = GARBAGE_ARGS;
	SVC_REPLY(xprt, &rply); 
}

/*
 * Some system error
 */
void
svcerr_systemerr(xprt)
	register SVCXPRT *xprt;
{
	struct rpc_msg rply; 

	rply.rm_direction = REPLY; 
	rply.rm_reply.rp_stat = MSG_ACCEPTED; 
	rply.acpted_rply.ar_verf = xprt->xp_verf;
	rply.acpted_rply.ar_stat = SYSTEM_ERR;
	SVC_REPLY(xprt, &rply); 
}

/*
 * Authentication error reply
 */
void
svcerr_auth(xprt, why)
	SVCXPRT *xprt;
	enum auth_stat why;
{
	struct rpc_msg rply;

	rply.rm_direction = REPLY;
	rply.rm_reply.rp_stat = MSG_DENIED;
	rply.rjcted_rply.rj_stat = AUTH_ERROR;
	rply.rjcted_rply.rj_why = why;
	SVC_REPLY(xprt, &rply);
}

/*
 * Auth too weak error reply
 */
void
svcerr_weakauth(xprt)
	SVCXPRT *xprt;
{

	svcerr_auth(xprt, AUTH_TOOWEAK);
}

/*
 * Program unavailable error reply
 */
void 
svcerr_noprog(xprt)
	register SVCXPRT *xprt;
{
	struct rpc_msg rply;  

	rply.rm_direction = REPLY;   
	rply.rm_reply.rp_stat = MSG_ACCEPTED;  
	rply.acpted_rply.ar_verf = xprt->xp_verf;  
	rply.acpted_rply.ar_stat = PROG_UNAVAIL;
	SVC_REPLY(xprt, &rply);
}

/*
 * Program version mismatch error reply
 */
void  
svcerr_progvers(xprt, low_vers, high_vers)
#ifdef __LP64__
	register SVCXPRT *xprt; 
	uint32_t low_vers;
	uint32_t high_vers;
#else
	register SVCXPRT *xprt; 
	u_long low_vers;
	u_long high_vers;
#endif
{
	struct rpc_msg rply;

	rply.rm_direction = REPLY;
	rply.rm_reply.rp_stat = MSG_ACCEPTED;
	rply.acpted_rply.ar_verf = xprt->xp_verf;
	rply.acpted_rply.ar_stat = PROG_MISMATCH;
	rply.acpted_rply.ar_vers.low = low_vers;
	rply.acpted_rply.ar_vers.high = high_vers;
	SVC_REPLY(xprt, &rply);
}

/* ******************* SERVER INPUT STUFF ******************* */

/*
 * Get server side input from some transport.
 *
 * Statement of authentication parameters management:
 * This function owns and manages all authentication parameters, specifically
 * the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
 * the "cooked" credentials (rqst->rq_clntcred).
 * However, this function does not know the structure of the cooked
 * credentials, so it make the following assumptions: 
 *   a) the structure is contiguous (no pointers), and
 *   b) the cred structure size does not exceed RQCRED_SIZE bytes. 
 * In all events, all three parameters are freed upon exit from this routine.
 * The storage is trivially management on the call stack in user land, but
 * is mallocated in kernel land.
 */

void
svc_getreq(rdfds)
	int rdfds;
{
	fd_set readfds;

	FD_ZERO(&readfds);
	readfds.fds_bits[0] = rdfds;
	svc_getreqset(&readfds);
}

void
svc_getreqset(readfds)
	fd_set *readfds;
{
	enum xprt_stat stat;
	struct rpc_msg msg;
	int prog_found;
#ifdef __LP64__
	uint32_t low_vers;
	uint32_t high_vers;
#else
	u_long low_vers;
	u_long high_vers;
#endif
	struct svc_req r;
	register SVCXPRT *xprt;
#ifdef __LP64__
	register uint32_t mask;
#else
	register u_long mask;
#endif
	register int bit;
#ifdef __LP64__
	register uint32_t *maskp;
#else
	register u_long *maskp;
#endif
	register int sock;
	char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
	msg.rm_call.cb_cred.oa_base = cred_area;
	msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
	r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);

#ifdef __LP64__
	maskp = (uint32_t *)readfds->fds_bits;
#else
	maskp = (u_long *)readfds->fds_bits;
#endif
	for (sock = 0; sock <= svc_maxfd; sock += NFDBITS) {
	    for (mask = *maskp++; (bit = ffs(mask)); mask ^= (1 << (bit - 1))) {
		if ((sock + bit) > (svc_maxfd + 1))
			/* if we're past our sockets */
			return;
		/* sock has input waiting */
		xprt = xports[sock + bit - 1];
		if (xprt == NULL)
			/* But do we control sock? */
			continue;
		/* now receive msgs from xprtprt (support batch calls) */
		do {
			if (SVC_RECV(xprt, &msg)) {

				/* now find the exported program and call it */
				register struct svc_callout *s;
				enum auth_stat why;

				r.rq_xprt = xprt;
				r.rq_prog = msg.rm_call.cb_prog;
				r.rq_vers = msg.rm_call.cb_vers;
				r.rq_proc = msg.rm_call.cb_proc;
				r.rq_cred = msg.rm_call.cb_cred;
				/* first authenticate the message */
				if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
					svcerr_auth(xprt, why);
					goto call_done;
				}
				/* now match message with a registered service*/
				prog_found = FALSE;
				low_vers = 0 - 1;
				high_vers = 0;
				for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
					if (s->sc_prog == r.rq_prog) {
						if (s->sc_vers == r.rq_vers) {
							(*s->sc_dispatch)(&r, xprt);
							goto call_done;
						}  /* found correct version */
						prog_found = TRUE;
						if (s->sc_vers < low_vers)
							low_vers = s->sc_vers;
						if (s->sc_vers > high_vers)
							high_vers = s->sc_vers;
					}   /* found correct program */
				}
				/*
				 * if we got here, the program or version
				 * is not served ...
				 */
				if (prog_found)
					svcerr_progvers(xprt,
					low_vers, high_vers);
				else
					 svcerr_noprog(xprt);
				/* Fall through to ... */
			}
		call_done:
			if ((stat = SVC_STAT(xprt)) == XPRT_DIED){
				SVC_DESTROY(xprt);
				break;
			}
		} while (stat == XPRT_MOREREQS);
	    }
	}
}
Commit	Line	Data
03fb6eb0 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
ad21edcc A	6	* Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.1 (the "License"). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
03fb6eb0 A	13	*
03fb6eb0 A	14	* The Original Code and all software distributed under the License are
ad21edcc	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
03fb6eb0 A	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
03fb6eb0 A	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ad21edcc A	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License.
03fb6eb0 A	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	26	* unrestricted use provided that this legend is included on all tape
	27	* media and as a part of the software program in whole or part. Users
	28	* may copy or modify Sun RPC without charge, but are not authorized
	29	* to license or distribute it to anyone else except as part of a product or
	30	* program developed by the user.
	31	*
	32	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	33	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	34	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	35	*
	36	* Sun RPC is provided with no support and without any obligation on the
	37	* part of Sun Microsystems, Inc. to assist in its use, correction,
	38	* modification or enhancement.
	39	*
	40	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	41	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	42	* OR ANY PART THEREOF.
	43	*
	44	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	45	* or profits or other special, indirect and consequential damages, even if
	46	* Sun has been advised of the possibility of such damages.
	47	*
	48	* Sun Microsystems, Inc.
	49	* 2550 Garcia Avenue
	50	* Mountain View, California 94043
	51	*/
	52
	53	#if defined(LIBC_SCCS) && !defined(lint)
	54	/static char sccsid = "from: @(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro";*/
	55	/static char sccsid = "from: @(#)svc.c 2.4 88/08/11 4.0 RPCSRC";*/
3b7c7bd7	56	static char *rcsid = "$Id: svc.c,v 1.4 2002/02/19 20:36:24 epeyton Exp $";
03fb6eb0 A	57	#endif
	58
	59	/*
	60	* svc.c, Server-side remote procedure call interface.
	61	*
	62	* There are two sets of procedures here. The xprt routines are
	63	* for handling transport handles. The svc routines handle the
	64	* list of service routines.
	65	*
	66	* Copyright (C) 1984, Sun Microsystems, Inc.
	67	*/
	68
3b7c7bd7 A	69	#include <stdlib.h>
3b7c7bd7 A	70	#include <string.h>
03fb6eb0 A	71	#include <sys/errno.h>
	72	#include <rpc/rpc.h>
	73	#include <rpc/pmap_clnt.h>
	74
	75	extern int errno;
	76
	77	static SVCXPRT **xports;
	78
	79	#define NULL_SVC ((struct svc_callout *)0)
	80	#define RQCRED_SIZE 400 /* this size is excessive */
	81
	82	#define max(a, b) (a > b ? a : b)
	83
	84	/*
	85	* The services list
	86	* Each entry represents a set of procedures (an rpc program).
	87	* The dispatch routine takes request structs and runs the
	88	* apropriate procedure.
	89	*/
	90	static struct svc_callout {
	91	struct svc_callout *sc_next;
1c0d47b0 A	92	#ifdef __LP64__
	93	uint32_t sc_prog;
	94	uint32_t sc_vers;
	95	#else
03fb6eb0 A	96	u_long sc_prog;
03fb6eb0 A	97	u_long sc_vers;
1c0d47b0	98	#endif
03fb6eb0 A	99	void (*sc_dispatch)();
	100	} *svc_head;
	101
	102	static struct svc_callout *svc_find();
	103
	104	/* ************* SVCXPRT related stuff ************** */
	105
	106	extern int svc_maxfd;
	107
	108	/*
	109	* Activate a transport handle.
	110	*/
	111	void
	112	xprt_register(xprt)
	113	SVCXPRT *xprt;
	114	{
	115	register int sock = xprt->xp_sock;
	116
	117	if (xports == NULL) {
	118	xports = (SVCXPRT **)
	119	mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
	120	}
	121	if (sock < FD_SETSIZE) {
	122	xports[sock] = xprt;
	123	FD_SET(sock, &svc_fdset);
	124	svc_maxfd = max(svc_maxfd, sock);
	125	}
	126	}
	127
	128	/*
	129	* De-activate a transport handle.
	130	*/
	131	void
	132	xprt_unregister(xprt)
	133	SVCXPRT *xprt;
	134	{
	135	register int sock = xprt->xp_sock;
	136
	137	if ((sock < FD_SETSIZE) && (xports[sock] == xprt)) {
	138	xports[sock] = (SVCXPRT *)0;
	139	FD_CLR(sock, &svc_fdset);
	140	if (sock == svc_maxfd) {
	141	for (svc_maxfd--; svc_maxfd>=0; svc_maxfd--)
	142	if (xports[svc_maxfd])
	143	break;
	144	}
	145	}
	146	}
	147
	148
	149	/* ******************** CALLOUT list related stuff *********** */
	150
	151	/*
	152	* Add a service program to the callout list.
	153	* The dispatch routine will be called when a rpc request for this
	154	* program number comes in.
	155	*/
	156	bool_t
	157	svc_register(xprt, prog, vers, dispatch, protocol)
b3dd680f A	158	#ifdef __LP64__
	159	SVCXPRT *xprt;
	160	uint32_t prog;
	161	uint32_t vers;
	162	void (*dispatch)();
	163	int32_t protocol;
	164	#else
03fb6eb0 A	165	SVCXPRT *xprt;
	166	u_long prog;
	167	u_long vers;
	168	void (*dispatch)();
	169	int protocol;
b3dd680f	170	#endif
03fb6eb0 A	171	{
	172	struct svc_callout *prev;
	173	register struct svc_callout *s;
	174
	175	if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
	176	if (s->sc_dispatch == dispatch)
	177	goto pmap_it; /* he is registering another xptr */
	178	return (FALSE);
	179	}
	180	s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
	181	if (s == (struct svc_callout *)0) {
	182	return (FALSE);
	183	}
	184	s->sc_prog = prog;
	185	s->sc_vers = vers;
	186	s->sc_dispatch = dispatch;
	187	s->sc_next = svc_head;
	188	svc_head = s;
	189	pmap_it:
	190	/* now register the information with the local binder service */
	191	if (protocol) {
	192	return (pmap_set(prog, vers, protocol, xprt->xp_port));
	193	}
	194	return (TRUE);
	195	}
	196
	197	/*
	198	* Remove a service program from the callout list.
	199	*/
	200	void
	201	svc_unregister(prog, vers)
b3dd680f A	202	#ifdef __LP64__
	203	uint32_t prog;
	204	uint32_t vers;
	205	#else
03fb6eb0 A	206	u_long prog;
03fb6eb0 A	207	u_long vers;
b3dd680f	208	#endif
03fb6eb0 A	209	{
	210	struct svc_callout *prev;
	211	register struct svc_callout *s;
	212
	213	if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
	214	return;
	215	if (prev == NULL_SVC) {
	216	svc_head = s->sc_next;
	217	} else {
	218	prev->sc_next = s->sc_next;
	219	}
	220	s->sc_next = NULL_SVC;
	221	mem_free((char *) s, (u_int) sizeof(struct svc_callout));
	222	/* now unregister the information with the local binder service */
	223	(void)pmap_unset(prog, vers);
	224	}
	225
	226	/*
	227	* Search the callout list for a program number, return the callout
	228	* struct.
	229	*/
	230	static struct svc_callout *
	231	svc_find(prog, vers, prev)
1c0d47b0 A	232	#ifdef __LP64__
	233	uint32_t prog;
	234	uint32_t vers;
	235	#else
03fb6eb0 A	236	u_long prog;
03fb6eb0 A	237	u_long vers;
1c0d47b0	238	#endif
03fb6eb0 A	239	struct svc_callout **prev;
	240	{
	241	register struct svc_callout s, p;
	242
	243	p = NULL_SVC;
	244	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
	245	if ((s->sc_prog == prog) && (s->sc_vers == vers))
	246	goto done;
	247	p = s;
	248	}
	249	done:
	250	*prev = p;
	251	return (s);
	252	}
	253
	254	/* ***************** REPLY GENERATION ROUTINES ********** */
	255
	256	/*
	257	* Send a reply to an rpc request
	258	*/
	259	bool_t
	260	svc_sendreply(xprt, xdr_results, xdr_location)
	261	register SVCXPRT *xprt;
	262	xdrproc_t xdr_results;
	263	caddr_t xdr_location;
	264	{
	265	struct rpc_msg rply;
	266
	267	rply.rm_direction = REPLY;
	268	rply.rm_reply.rp_stat = MSG_ACCEPTED;
	269	rply.acpted_rply.ar_verf = xprt->xp_verf;
	270	rply.acpted_rply.ar_stat = SUCCESS;
	271	rply.acpted_rply.ar_results.where = xdr_location;
	272	rply.acpted_rply.ar_results.proc = xdr_results;
	273	return (SVC_REPLY(xprt, &rply));
	274	}
	275
	276	/*
	277	* No procedure error reply
	278	*/
	279	void
	280	svcerr_noproc(xprt)
	281	register SVCXPRT *xprt;
	282	{
	283	struct rpc_msg rply;
	284
	285	rply.rm_direction = REPLY;
	286	rply.rm_reply.rp_stat = MSG_ACCEPTED;
	287	rply.acpted_rply.ar_verf = xprt->xp_verf;
	288	rply.acpted_rply.ar_stat = PROC_UNAVAIL;
	289	SVC_REPLY(xprt, &rply);
	290	}
	291
	292	/*
	293	* Can't decode args error reply
	294	*/
	295	void
	296	svcerr_decode(xprt)
	297	register SVCXPRT *xprt;
	298	{
	299	struct rpc_msg rply;
	300
	301	rply.rm_direction = REPLY;
	302	rply.rm_reply.rp_stat = MSG_ACCEPTED;
303	rply.acpted_rply.ar_verf = xprt->xp_verf;
304	rply.acpted_rply.ar_stat = GARBAGE_ARGS;
305	SVC_REPLY(xprt, &rply);
306	}
307
308	/*
309	* Some system error
310	*/
311	void
312	svcerr_systemerr(xprt)
313	register SVCXPRT *xprt;
314	{
315	struct rpc_msg rply;
316
317	rply.rm_direction = REPLY;
318	rply.rm_reply.rp_stat = MSG_ACCEPTED;
319	rply.acpted_rply.ar_verf = xprt->xp_verf;
320	rply.acpted_rply.ar_stat = SYSTEM_ERR;
321	SVC_REPLY(xprt, &rply);
322	}
323
324	/*
325	* Authentication error reply
326	*/
327	void
328	svcerr_auth(xprt, why)
329	SVCXPRT *xprt;
330	enum auth_stat why;
331	{
332	struct rpc_msg rply;
333
334	rply.rm_direction = REPLY;
335	rply.rm_reply.rp_stat = MSG_DENIED;
336	rply.rjcted_rply.rj_stat = AUTH_ERROR;
337	rply.rjcted_rply.rj_why = why;
338	SVC_REPLY(xprt, &rply);
339	}
340
341	/*
342	* Auth too weak error reply
343	*/
344	void
345	svcerr_weakauth(xprt)
346	SVCXPRT *xprt;
347	{
348
349	svcerr_auth(xprt, AUTH_TOOWEAK);
350	}
351
352	/*
353	* Program unavailable error reply
354	*/
355	void
356	svcerr_noprog(xprt)
357	register SVCXPRT *xprt;
358	{
359	struct rpc_msg rply;
360
361	rply.rm_direction = REPLY;
362	rply.rm_reply.rp_stat = MSG_ACCEPTED;
363	rply.acpted_rply.ar_verf = xprt->xp_verf;
364	rply.acpted_rply.ar_stat = PROG_UNAVAIL;
365	SVC_REPLY(xprt, &rply);
366	}
367
368	/*
369	* Program version mismatch error reply
370	*/
371	void
372	svcerr_progvers(xprt, low_vers, high_vers)
b3dd680f A	373	#ifdef __LP64__
	374	register SVCXPRT *xprt;
	375	uint32_t low_vers;
	376	uint32_t high_vers;
	377	#else
03fb6eb0 A	378	register SVCXPRT *xprt;
	379	u_long low_vers;
	380	u_long high_vers;
b3dd680f	381	#endif
03fb6eb0 A	382	{
	383	struct rpc_msg rply;
	384
	385	rply.rm_direction = REPLY;
	386	rply.rm_reply.rp_stat = MSG_ACCEPTED;
	387	rply.acpted_rply.ar_verf = xprt->xp_verf;
	388	rply.acpted_rply.ar_stat = PROG_MISMATCH;
	389	rply.acpted_rply.ar_vers.low = low_vers;
	390	rply.acpted_rply.ar_vers.high = high_vers;
	391	SVC_REPLY(xprt, &rply);
	392	}
	393
	394	/* ***************** SERVER INPUT STUFF ***************** */
	395
	396	/*
	397	* Get server side input from some transport.
	398	*
	399	* Statement of authentication parameters management:
	400	* This function owns and manages all authentication parameters, specifically
	401	* the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
	402	* the "cooked" credentials (rqst->rq_clntcred).
	403	* However, this function does not know the structure of the cooked
	404	* credentials, so it make the following assumptions:
	405	* a) the structure is contiguous (no pointers), and
	406	* b) the cred structure size does not exceed RQCRED_SIZE bytes.
	407	* In all events, all three parameters are freed upon exit from this routine.
	408	* The storage is trivially management on the call stack in user land, but
	409	* is mallocated in kernel land.
	410	*/
	411
	412	void
	413	svc_getreq(rdfds)
	414	int rdfds;
	415	{
	416	fd_set readfds;
	417
	418	FD_ZERO(&readfds);
	419	readfds.fds_bits[0] = rdfds;
	420	svc_getreqset(&readfds);
	421	}
	422
	423	void
	424	svc_getreqset(readfds)
	425	fd_set *readfds;
	426	{
	427	enum xprt_stat stat;
	428	struct rpc_msg msg;
	429	int prog_found;
1c0d47b0 A	430	#ifdef __LP64__
	431	uint32_t low_vers;
	432	uint32_t high_vers;
	433	#else
03fb6eb0 A	434	u_long low_vers;
03fb6eb0 A	435	u_long high_vers;
1c0d47b0	436	#endif
03fb6eb0 A	437	struct svc_req r;
03fb6eb0 A	438	register SVCXPRT *xprt;
1c0d47b0 A	439	#ifdef __LP64__
	440	register uint32_t mask;
	441	#else
03fb6eb0	442	register u_long mask;
1c0d47b0	443	#endif
03fb6eb0	444	register int bit;
1c0d47b0 A	445	#ifdef __LP64__
	446	register uint32_t *maskp;
	447	#else
03fb6eb0	448	register u_long *maskp;
1c0d47b0	449	#endif
03fb6eb0 A	450	register int sock;
	451	char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
	452	msg.rm_call.cb_cred.oa_base = cred_area;
	453	msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
	454	r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);
	455
1c0d47b0 A	456	#ifdef __LP64__
	457	maskp = (uint32_t *)readfds->fds_bits;
	458	#else
03fb6eb0	459	maskp = (u_long *)readfds->fds_bits;
1c0d47b0	460	#endif
a0865d63	461	for (sock = 0; sock <= svc_maxfd; sock += NFDBITS) {
3b7c7bd7	462	for (mask = *maskp++; (bit = ffs(mask)); mask ^= (1 << (bit - 1))) {
a0865d63 A	463	if ((sock + bit) > (svc_maxfd + 1))
	464	/* if we're past our sockets */
	465	return;
03fb6eb0 A	466	/* sock has input waiting */
	467	xprt = xports[sock + bit - 1];
	468	if (xprt == NULL)
	469	/* But do we control sock? */
	470	continue;
	471	/* now receive msgs from xprtprt (support batch calls) */
	472	do {
	473	if (SVC_RECV(xprt, &msg)) {
	474
	475	/* now find the exported program and call it */
	476	register struct svc_callout *s;
	477	enum auth_stat why;
	478
	479	r.rq_xprt = xprt;
	480	r.rq_prog = msg.rm_call.cb_prog;
	481	r.rq_vers = msg.rm_call.cb_vers;
	482	r.rq_proc = msg.rm_call.cb_proc;
	483	r.rq_cred = msg.rm_call.cb_cred;
	484	/* first authenticate the message */
	485	if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
	486	svcerr_auth(xprt, why);
	487	goto call_done;
	488	}
	489	/* now match message with a registered service*/
	490	prog_found = FALSE;
	491	low_vers = 0 - 1;
	492	high_vers = 0;
	493	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
	494	if (s->sc_prog == r.rq_prog) {
	495	if (s->sc_vers == r.rq_vers) {
	496	(*s->sc_dispatch)(&r, xprt);
	497	goto call_done;
	498	} /* found correct version */
	499	prog_found = TRUE;
	500	if (s->sc_vers < low_vers)
	501	low_vers = s->sc_vers;
	502	if (s->sc_vers > high_vers)
	503	high_vers = s->sc_vers;
	504	} /* found correct program */
	505	}
	506	/*
	507	* if we got here, the program or version
	508	* is not served ...
	509	*/
	510	if (prog_found)
	511	svcerr_progvers(xprt,
	512	low_vers, high_vers);
	513	else
	514	svcerr_noprog(xprt);
	515	/* Fall through to ... */
	516	}
	517	call_done:
	518	if ((stat = SVC_STAT(xprt)) == XPRT_DIED){
	519	SVC_DESTROY(xprt);
	520	break;
	521	}
	522	} while (stat == XPRT_MOREREQS);
	523	}
	524	}
	525	}