[unix-history] / lib / librpc / rpc / svc.c

/*
 * 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 1.3 1993/08/26 00:53:37 jtc 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 <sys/errno.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>

extern int errno;

#ifdef FD_SETSIZE
static SVCXPRT **xports;
#else
#define NOFILE 32

static SVCXPRT *xports[NOFILE];
#endif /* def FD_SETSIZE */

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

/*
 * 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;
	u_long		    sc_prog;
	u_long		    sc_vers;
	void		    (*sc_dispatch)();
} *svc_head;

static struct svc_callout *svc_find();

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

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

#ifdef FD_SETSIZE
	if (xports == NULL) {
		xports = (SVCXPRT **)
			mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
	}
	if (sock < _rpc_dtablesize()) {
		xports[sock] = xprt;
		FD_SET(sock, &svc_fdset);
	}
#else
	if (sock < NOFILE) {
		xports[sock] = xprt;
		svc_fds |= (1 << sock);
	}
#endif /* def FD_SETSIZE */

}

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

#ifdef FD_SETSIZE
	if ((sock < _rpc_dtablesize()) && (xports[sock] == xprt)) {
		xports[sock] = (SVCXPRT *)0;
		FD_CLR(sock, &svc_fdset);
	}
#else
	if ((sock < NOFILE) && (xports[sock] == xprt)) {
		xports[sock] = (SVCXPRT *)0;
		svc_fds &= ~(1 << sock);
	}
#endif /* def FD_SETSIZE */
}


/* ********************** 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)
	SVCXPRT *xprt;
	u_long prog;
	u_long vers;
	void (*dispatch)();
	int protocol;
{
	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)
	u_long prog;
	u_long vers;
{
	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)
	u_long prog;
	u_long vers;
	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)
	register SVCXPRT *xprt; 
	u_long low_vers;
	u_long high_vers;
{
	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;
{
#ifdef FD_SETSIZE
	fd_set readfds;

	FD_ZERO(&readfds);
	readfds.fds_bits[0] = rdfds;
	svc_getreqset(&readfds);
#else
	int readfds = rdfds & svc_fds;

	svc_getreqset(&readfds);
#endif /* def FD_SETSIZE */
}

void
svc_getreqset(readfds)
#ifdef FD_SETSIZE
	fd_set *readfds;
{
#else
	int *readfds;
{
    int readfds_local = *readfds;
#endif /* def FD_SETSIZE */
	enum xprt_stat stat;
	struct rpc_msg msg;
	int prog_found;
	u_long low_vers;
	u_long high_vers;
	struct svc_req r;
	register SVCXPRT *xprt;
	register u_long mask;
	register int bit;
	register u_long *maskp;
	register int setsize;
	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 FD_SETSIZE
	setsize = _rpc_dtablesize();	
	maskp = (u_long *)readfds->fds_bits;
	for (sock = 0; sock < setsize; sock += NFDBITS) {
	    for (mask = *maskp++; bit = ffs(mask); mask ^= (1 << (bit - 1))) {
		/* sock has input waiting */
		xprt = xports[sock + bit - 1];
#else
	for (sock = 0; readfds_local != 0; sock++, readfds_local >>= 1) {
	    if ((readfds_local & 1) != 0) {
		/* sock has input waiting */
		xprt = xports[sock];
#endif /* def FD_SETSIZE */
		/* 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
15637ed4 RG	1	/*
	2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	3	* unrestricted use provided that this legend is included on all tape
	4	* media and as a part of the software program in whole or part. Users
	5	* may copy or modify Sun RPC without charge, but are not authorized
	6	* to license or distribute it to anyone else except as part of a product or
	7	* program developed by the user.
	8	*
	9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	12	*
	13	* Sun RPC is provided with no support and without any obligation on the
	14	* part of Sun Microsystems, Inc. to assist in its use, correction,
	15	* modification or enhancement.
	16	*
	17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	19	* OR ANY PART THEREOF.
	20	*
	21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	22	* or profits or other special, indirect and consequential damages, even if
	23	* Sun has been advised of the possibility of such damages.
	24	*
	25	* Sun Microsystems, Inc.
	26	* 2550 Garcia Avenue
	27	* Mountain View, California 94043
	28	*/
d2bc008e C	29
	30	#if defined(LIBC_SCCS) && !defined(lint)
	31	/static char sccsid = "from: @(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro";*/
	32	/static char sccsid = "from: @(#)svc.c 2.4 88/08/11 4.0 RPCSRC";*/
	33	static char *rcsid = "$Id: svc.c,v 1.3 1993/08/26 00:53:37 jtc Exp $";
15637ed4 RG	34	#endif
	35
	36	/*
	37	* svc.c, Server-side remote procedure call interface.
	38	*
	39	* There are two sets of procedures here. The xprt routines are
	40	* for handling transport handles. The svc routines handle the
	41	* list of service routines.
	42	*
	43	* Copyright (C) 1984, Sun Microsystems, Inc.
	44	*/
	45
	46	#include <sys/errno.h>
	47	#include <rpc/rpc.h>
	48	#include <rpc/pmap_clnt.h>
	49
	50	extern int errno;
	51
	52	#ifdef FD_SETSIZE
	53	static SVCXPRT **xports;
	54	#else
	55	#define NOFILE 32
	56
	57	static SVCXPRT *xports[NOFILE];
	58	#endif /* def FD_SETSIZE */
	59
	60	#define NULL_SVC ((struct svc_callout *)0)
	61	#define RQCRED_SIZE 400 /* this size is excessive */
	62
	63	/*
	64	* The services list
	65	* Each entry represents a set of procedures (an rpc program).
	66	* The dispatch routine takes request structs and runs the
	67	* apropriate procedure.
	68	*/
	69	static struct svc_callout {
	70	struct svc_callout *sc_next;
	71	u_long sc_prog;
	72	u_long sc_vers;
	73	void (*sc_dispatch)();
	74	} *svc_head;
	75
	76	static struct svc_callout *svc_find();
	77
	78	/* ************* SVCXPRT related stuff ************** */
	79
	80	/*
	81	* Activate a transport handle.
	82	*/
	83	void
	84	xprt_register(xprt)
	85	SVCXPRT *xprt;
	86	{
	87	register int sock = xprt->xp_sock;
	88
	89	#ifdef FD_SETSIZE
	90	if (xports == NULL) {
	91	xports = (SVCXPRT **)
	92	mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
	93	}
	94	if (sock < _rpc_dtablesize()) {
	95	xports[sock] = xprt;
	96	FD_SET(sock, &svc_fdset);
	97	}
98	#else
99	if (sock < NOFILE) {
100	xports[sock] = xprt;
101	svc_fds \|= (1 << sock);
102	}
103	#endif /* def FD_SETSIZE */
104
105	}
106
107	/*
108	* De-activate a transport handle.
109	*/
110	void
111	xprt_unregister(xprt)
112	SVCXPRT *xprt;
113	{
114	register int sock = xprt->xp_sock;
115
116	#ifdef FD_SETSIZE
117	if ((sock < _rpc_dtablesize()) && (xports[sock] == xprt)) {
118	xports[sock] = (SVCXPRT *)0;
119	FD_CLR(sock, &svc_fdset);
120	}
121	#else
122	if ((sock < NOFILE) && (xports[sock] == xprt)) {
123	xports[sock] = (SVCXPRT *)0;
124	svc_fds &= ~(1 << sock);
125	}
126	#endif /* def FD_SETSIZE */
127	}
128
129
130	/* ******************** CALLOUT list related stuff *********** */
131
132	/*
133	* Add a service program to the callout list.
134	* The dispatch routine will be called when a rpc request for this
135	* program number comes in.
136	*/
137	bool_t
138	svc_register(xprt, prog, vers, dispatch, protocol)
139	SVCXPRT *xprt;
140	u_long prog;
141	u_long vers;
142	void (*dispatch)();
143	int protocol;
144	{
145	struct svc_callout *prev;
146	register struct svc_callout *s;
147
148	if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
149	if (s->sc_dispatch == dispatch)
150	goto pmap_it; /* he is registering another xptr */
151	return (FALSE);
152	}
153	s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
154	if (s == (struct svc_callout *)0) {
155	return (FALSE);
156	}
157	s->sc_prog = prog;
158	s->sc_vers = vers;
159	s->sc_dispatch = dispatch;
160	s->sc_next = svc_head;
161	svc_head = s;
162	pmap_it:
163	/* now register the information with the local binder service */
164	if (protocol) {
165	return (pmap_set(prog, vers, protocol, xprt->xp_port));
166	}
167	return (TRUE);
168	}
169
170	/*
171	* Remove a service program from the callout list.
172	*/
173	void
174	svc_unregister(prog, vers)
175	u_long prog;
176	u_long vers;
177	{
178	struct svc_callout *prev;
179	register struct svc_callout *s;
180
181	if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
182	return;
183	if (prev == NULL_SVC) {
184	svc_head = s->sc_next;
185	} else {
186	prev->sc_next = s->sc_next;
187	}
188	s->sc_next = NULL_SVC;
189	mem_free((char *) s, (u_int) sizeof(struct svc_callout));
190	/* now unregister the information with the local binder service */
191	(void)pmap_unset(prog, vers);
192	}
193
194	/*
195	* Search the callout list for a program number, return the callout
196	* struct.
197	*/
198	static struct svc_callout *
199	svc_find(prog, vers, prev)
200	u_long prog;
201	u_long vers;
202	struct svc_callout **prev;
203	{
204	register struct svc_callout s, p;
205
206	p = NULL_SVC;
207	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
208	if ((s->sc_prog == prog) && (s->sc_vers == vers))
209	goto done;
210	p = s;
211	}
212	done:
213	*prev = p;
214	return (s);
215	}
216
217	/* ***************** REPLY GENERATION ROUTINES ********** */
218
219	/*
220	* Send a reply to an rpc request
221	*/
222	bool_t
223	svc_sendreply(xprt, xdr_results, xdr_location)
224	register SVCXPRT *xprt;
225	xdrproc_t xdr_results;
226	caddr_t xdr_location;
227	{
228	struct rpc_msg rply;
229
230	rply.rm_direction = REPLY;
231	rply.rm_reply.rp_stat = MSG_ACCEPTED;
232	rply.acpted_rply.ar_verf = xprt->xp_verf;
233	rply.acpted_rply.ar_stat = SUCCESS;
234	rply.acpted_rply.ar_results.where = xdr_location;
235	rply.acpted_rply.ar_results.proc = xdr_results;
236	return (SVC_REPLY(xprt, &rply));
237	}
238
239	/*
240	* No procedure error reply
241	*/
242	void
243	svcerr_noproc(xprt)
244	register SVCXPRT *xprt;
245	{
246	struct rpc_msg rply;
247
248	rply.rm_direction = REPLY;
249	rply.rm_reply.rp_stat = MSG_ACCEPTED;
250	rply.acpted_rply.ar_verf = xprt->xp_verf;
251	rply.acpted_rply.ar_stat = PROC_UNAVAIL;
252	SVC_REPLY(xprt, &rply);
253	}
254
255	/*
256	* Can't decode args error reply
257	*/
258	void
259	svcerr_decode(xprt)
260	register SVCXPRT *xprt;
261	{
262	struct rpc_msg rply;
263
264	rply.rm_direction = REPLY;
265	rply.rm_reply.rp_stat = MSG_ACCEPTED;
266	rply.acpted_rply.ar_verf = xprt->xp_verf;
267	rply.acpted_rply.ar_stat = GARBAGE_ARGS;
268	SVC_REPLY(xprt, &rply);
269	}
270
271	/*
272	* Some system error
273	*/
274	void
275	svcerr_systemerr(xprt)
276	register SVCXPRT *xprt;
277	{
278	struct rpc_msg rply;
279
280	rply.rm_direction = REPLY;
281	rply.rm_reply.rp_stat = MSG_ACCEPTED;
282	rply.acpted_rply.ar_verf = xprt->xp_verf;
283	rply.acpted_rply.ar_stat = SYSTEM_ERR;
284	SVC_REPLY(xprt, &rply);
285	}
286
287	/*
288	* Authentication error reply
289	*/
290	void
291	svcerr_auth(xprt, why)
292	SVCXPRT *xprt;
293	enum auth_stat why;
294	{
295	struct rpc_msg rply;
296
297	rply.rm_direction = REPLY;
298	rply.rm_reply.rp_stat = MSG_DENIED;
299	rply.rjcted_rply.rj_stat = AUTH_ERROR;
300	rply.rjcted_rply.rj_why = why;
301	SVC_REPLY(xprt, &rply);
302	}
303
304	/*
305	* Auth too weak error reply
306	*/
307	void
308	svcerr_weakauth(xprt)
309	SVCXPRT *xprt;
310	{
311
312	svcerr_auth(xprt, AUTH_TOOWEAK);
313	}
314
315	/*
316	* Program unavailable error reply
317	*/
318	void
319	svcerr_noprog(xprt)
320	register SVCXPRT *xprt;
321	{
322	struct rpc_msg rply;
323
324	rply.rm_direction = REPLY;
325	rply.rm_reply.rp_stat = MSG_ACCEPTED;
326	rply.acpted_rply.ar_verf = xprt->xp_verf;
327	rply.acpted_rply.ar_stat = PROG_UNAVAIL;
328	SVC_REPLY(xprt, &rply);
329	}
330
331	/*
332	* Program version mismatch error reply
333	*/
334	void
335	svcerr_progvers(xprt, low_vers, high_vers)
336	register SVCXPRT *xprt;
337	u_long low_vers;
338	u_long high_vers;
339	{
340	struct rpc_msg rply;
341
342	rply.rm_direction = REPLY;
343	rply.rm_reply.rp_stat = MSG_ACCEPTED;
344	rply.acpted_rply.ar_verf = xprt->xp_verf;
345	rply.acpted_rply.ar_stat = PROG_MISMATCH;
346	rply.acpted_rply.ar_vers.low = low_vers;
347	rply.acpted_rply.ar_vers.high = high_vers;
348	SVC_REPLY(xprt, &rply);
349	}
350
351	/* ***************** SERVER INPUT STUFF ***************** */
352
353	/*
354	* Get server side input from some transport.
355	*
356	* Statement of authentication parameters management:
357	* This function owns and manages all authentication parameters, specifically
358	* the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
359	* the "cooked" credentials (rqst->rq_clntcred).
360	* However, this function does not know the structure of the cooked
361	* credentials, so it make the following assumptions:
362	* a) the structure is contiguous (no pointers), and
363	* b) the cred structure size does not exceed RQCRED_SIZE bytes.
364	* In all events, all three parameters are freed upon exit from this routine.
365	* The storage is trivially management on the call stack in user land, but
366	* is mallocated in kernel land.
367	*/
368
369	void
370	svc_getreq(rdfds)
371	int rdfds;
372	{
373	#ifdef FD_SETSIZE
374	fd_set readfds;
375
376	FD_ZERO(&readfds);
377	readfds.fds_bits[0] = rdfds;
378	svc_getreqset(&readfds);
379	#else
380	int readfds = rdfds & svc_fds;
381
382	svc_getreqset(&readfds);
383	#endif /* def FD_SETSIZE */
384	}
385
386	void
387	svc_getreqset(readfds)
388	#ifdef FD_SETSIZE
389	fd_set *readfds;
390	{
391	#else
392	int *readfds;
393	{
394	int readfds_local = *readfds;
395	#endif /* def FD_SETSIZE */
396	enum xprt_stat stat;
397	struct rpc_msg msg;
398	int prog_found;
399	u_long low_vers;
400	u_long high_vers;
401	struct svc_req r;
402	register SVCXPRT *xprt;
403	register u_long mask;
404	register int bit;
405	register u_long *maskp;
406	register int setsize;
407	register int sock;
408	char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
409	msg.rm_call.cb_cred.oa_base = cred_area;
410	msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
411	r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);
412
413
414	#ifdef FD_SETSIZE
415	setsize = _rpc_dtablesize();
416	maskp = (u_long *)readfds->fds_bits;
417	for (sock = 0; sock < setsize; sock += NFDBITS) {
418	for (mask = *maskp++; bit = ffs(mask); mask ^= (1 << (bit - 1))) {
419	/* sock has input waiting */
420	xprt = xports[sock + bit - 1];
421	#else
422	for (sock = 0; readfds_local != 0; sock++, readfds_local >>= 1) {
423	if ((readfds_local & 1) != 0) {
424	/* sock has input waiting */
425	xprt = xports[sock];
426	#endif /* def FD_SETSIZE */
427	/* now receive msgs from xprtprt (support batch calls) */
428	do {
429	if (SVC_RECV(xprt, &msg)) {
430
431	/* now find the exported program and call it */
432	register struct svc_callout *s;
433	enum auth_stat why;
434
435	r.rq_xprt = xprt;
436	r.rq_prog = msg.rm_call.cb_prog;
437	r.rq_vers = msg.rm_call.cb_vers;
438	r.rq_proc = msg.rm_call.cb_proc;
439	r.rq_cred = msg.rm_call.cb_cred;
440	/* first authenticate the message */
441	if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
442	svcerr_auth(xprt, why);
443	goto call_done;
444	}
445	/* now match message with a registered service*/
446	prog_found = FALSE;
447	low_vers = 0 - 1;
448	high_vers = 0;
449	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
450	if (s->sc_prog == r.rq_prog) {
451	if (s->sc_vers == r.rq_vers) {
452	(*s->sc_dispatch)(&r, xprt);
453	goto call_done;
454	} /* found correct version */
455	prog_found = TRUE;
456	if (s->sc_vers < low_vers)
457	low_vers = s->sc_vers;
458	if (s->sc_vers > high_vers)
459	high_vers = s->sc_vers;
460	} /* found correct program */
461	}
462	/*
463	* if we got here, the program or version
464	* is not served ...
465	*/
466	if (prog_found)
467	svcerr_progvers(xprt,
468	low_vers, high_vers);
469	else
470	svcerr_noprog(xprt);
471	/* Fall through to ... */
472	}
473	call_done:
474	if ((stat = SVC_STAT(xprt)) == XPRT_DIED){
475	SVC_DESTROY(xprt);
476	break;
477	}
478	} while (stat == XPRT_MOREREQS);
479	}
480	}
481	}