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

/* @(#)svc.c	2.4 88/08/11 4.0 RPCSRC; from 1.44 88/02/08 SMI */
/*
 * 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(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)svc.c 1.41 87/10/13 Copyr 1984 Sun Micro";
#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	/* @(#)svc.c 2.4 88/08/11 4.0 RPCSRC; from 1.44 88/02/08 SMI */
	2	/*
	3	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	4	* unrestricted use provided that this legend is included on all tape
	5	* media and as a part of the software program in whole or part. Users
	6	* may copy or modify Sun RPC without charge, but are not authorized
	7	* to license or distribute it to anyone else except as part of a product or
	8	* program developed by the user.
	9	*
	10	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	11	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	12	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	13	*
	14	* Sun RPC is provided with no support and without any obligation on the
	15	* part of Sun Microsystems, Inc. to assist in its use, correction,
	16	* modification or enhancement.
	17	*
	18	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	19	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	20	* OR ANY PART THEREOF.
	21	*
	22	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	23	* or profits or other special, indirect and consequential damages, even if
	24	* Sun has been advised of the possibility of such damages.
	25	*
	26	* Sun Microsystems, Inc.
	27	* 2550 Garcia Avenue
	28	* Mountain View, California 94043
	29	*/
	30	#if !defined(lint) && defined(SCCSIDS)
	31	static char sccsid[] = "@(#)svc.c 1.41 87/10/13 Copyr 1984 Sun Micro";
	32	#endif
	33
	34	/*
	35	* svc.c, Server-side remote procedure call interface.
	36	*
	37	* There are two sets of procedures here. The xprt routines are
	38	* for handling transport handles. The svc routines handle the
	39	* list of service routines.
	40	*
	41	* Copyright (C) 1984, Sun Microsystems, Inc.
	42	*/
	43
	44	#include <sys/errno.h>
	45	#include <rpc/rpc.h>
	46	#include <rpc/pmap_clnt.h>
	47
	48	extern int errno;
	49
	50	#ifdef FD_SETSIZE
	51	static SVCXPRT **xports;
	52	#else
	53	#define NOFILE 32
	54
	55	static SVCXPRT *xports[NOFILE];
	56	#endif /* def FD_SETSIZE */
	57
	58	#define NULL_SVC ((struct svc_callout *)0)
	59	#define RQCRED_SIZE 400 /* this size is excessive */
	60
	61	/*
	62	* The services list
	63	* Each entry represents a set of procedures (an rpc program).
	64	* The dispatch routine takes request structs and runs the
65	* apropriate procedure.
66	*/
67	static struct svc_callout {
68	struct svc_callout *sc_next;
69	u_long sc_prog;
70	u_long sc_vers;
71	void (*sc_dispatch)();
72	} *svc_head;
73
74	static struct svc_callout *svc_find();
75
76	/* ************* SVCXPRT related stuff ************** */
77
78	/*
79	* Activate a transport handle.
80	*/
81	void
82	xprt_register(xprt)
83	SVCXPRT *xprt;
84	{
85	register int sock = xprt->xp_sock;
86
87	#ifdef FD_SETSIZE
88	if (xports == NULL) {
89	xports = (SVCXPRT **)
90	mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
91	}
92	if (sock < _rpc_dtablesize()) {
93	xports[sock] = xprt;
94	FD_SET(sock, &svc_fdset);
95	}
96	#else
97	if (sock < NOFILE) {
98	xports[sock] = xprt;
99	svc_fds \|= (1 << sock);
100	}
101	#endif /* def FD_SETSIZE */
102
103	}
104
105	/*
106	* De-activate a transport handle.
107	*/
108	void
109	xprt_unregister(xprt)
110	SVCXPRT *xprt;
111	{
112	register int sock = xprt->xp_sock;
113
114	#ifdef FD_SETSIZE
115	if ((sock < _rpc_dtablesize()) && (xports[sock] == xprt)) {
116	xports[sock] = (SVCXPRT *)0;
117	FD_CLR(sock, &svc_fdset);
118	}
119	#else
120	if ((sock < NOFILE) && (xports[sock] == xprt)) {
121	xports[sock] = (SVCXPRT *)0;
122	svc_fds &= ~(1 << sock);
123	}
124	#endif /* def FD_SETSIZE */
125	}
126
127
128	/* ******************** CALLOUT list related stuff *********** */
129
130	/*
131	* Add a service program to the callout list.
132	* The dispatch routine will be called when a rpc request for this
133	* program number comes in.
134	*/
135	bool_t
136	svc_register(xprt, prog, vers, dispatch, protocol)
137	SVCXPRT *xprt;
138	u_long prog;
139	u_long vers;
140	void (*dispatch)();
141	int protocol;
142	{
143	struct svc_callout *prev;
144	register struct svc_callout *s;
145
146	if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
147	if (s->sc_dispatch == dispatch)
148	goto pmap_it; /* he is registering another xptr */
149	return (FALSE);
150	}
151	s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
152	if (s == (struct svc_callout *)0) {
153	return (FALSE);
154	}
155	s->sc_prog = prog;
156	s->sc_vers = vers;
157	s->sc_dispatch = dispatch;
158	s->sc_next = svc_head;
159	svc_head = s;
160	pmap_it:
161	/* now register the information with the local binder service */
162	if (protocol) {
163	return (pmap_set(prog, vers, protocol, xprt->xp_port));
164	}
165	return (TRUE);
166	}
167
168	/*
169	* Remove a service program from the callout list.
170	*/
171	void
172	svc_unregister(prog, vers)
173	u_long prog;
174	u_long vers;
175	{
176	struct svc_callout *prev;
177	register struct svc_callout *s;
178
179	if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
180	return;
181	if (prev == NULL_SVC) {
182	svc_head = s->sc_next;
183	} else {
184	prev->sc_next = s->sc_next;
185	}
186	s->sc_next = NULL_SVC;
187	mem_free((char *) s, (u_int) sizeof(struct svc_callout));
188	/* now unregister the information with the local binder service */
189	(void)pmap_unset(prog, vers);
190	}
191
192	/*
193	* Search the callout list for a program number, return the callout
194	* struct.
195	*/
196	static struct svc_callout *
197	svc_find(prog, vers, prev)
198	u_long prog;
199	u_long vers;
200	struct svc_callout **prev;
201	{
202	register struct svc_callout s, p;
203
204	p = NULL_SVC;
205	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
206	if ((s->sc_prog == prog) && (s->sc_vers == vers))
207	goto done;
208	p = s;
209	}
210	done:
211	*prev = p;
212	return (s);
213	}
214
215	/* ***************** REPLY GENERATION ROUTINES ********** */
216
217	/*
218	* Send a reply to an rpc request
219	*/
220	bool_t
221	svc_sendreply(xprt, xdr_results, xdr_location)
222	register SVCXPRT *xprt;
223	xdrproc_t xdr_results;
224	caddr_t xdr_location;
225	{
226	struct rpc_msg rply;
227
228	rply.rm_direction = REPLY;
229	rply.rm_reply.rp_stat = MSG_ACCEPTED;
230	rply.acpted_rply.ar_verf = xprt->xp_verf;
231	rply.acpted_rply.ar_stat = SUCCESS;
232	rply.acpted_rply.ar_results.where = xdr_location;
233	rply.acpted_rply.ar_results.proc = xdr_results;
234	return (SVC_REPLY(xprt, &rply));
235	}
236
237	/*
238	* No procedure error reply
239	*/
240	void
241	svcerr_noproc(xprt)
242	register SVCXPRT *xprt;
243	{
244	struct rpc_msg rply;
245
246	rply.rm_direction = REPLY;
247	rply.rm_reply.rp_stat = MSG_ACCEPTED;
248	rply.acpted_rply.ar_verf = xprt->xp_verf;
249	rply.acpted_rply.ar_stat = PROC_UNAVAIL;
250	SVC_REPLY(xprt, &rply);
251	}
252
253	/*
254	* Can't decode args error reply
255	*/
256	void
257	svcerr_decode(xprt)
258	register SVCXPRT *xprt;
259	{
260	struct rpc_msg rply;
261
262	rply.rm_direction = REPLY;
263	rply.rm_reply.rp_stat = MSG_ACCEPTED;
264	rply.acpted_rply.ar_verf = xprt->xp_verf;
265	rply.acpted_rply.ar_stat = GARBAGE_ARGS;
266	SVC_REPLY(xprt, &rply);
267	}
268
269	/*
270	* Some system error
271	*/
272	void
273	svcerr_systemerr(xprt)
274	register SVCXPRT *xprt;
275	{
276	struct rpc_msg rply;
277
278	rply.rm_direction = REPLY;
279	rply.rm_reply.rp_stat = MSG_ACCEPTED;
280	rply.acpted_rply.ar_verf = xprt->xp_verf;
281	rply.acpted_rply.ar_stat = SYSTEM_ERR;
282	SVC_REPLY(xprt, &rply);
283	}
284
285	/*
286	* Authentication error reply
287	*/
288	void
289	svcerr_auth(xprt, why)
290	SVCXPRT *xprt;
291	enum auth_stat why;
292	{
293	struct rpc_msg rply;
294
295	rply.rm_direction = REPLY;
296	rply.rm_reply.rp_stat = MSG_DENIED;
297	rply.rjcted_rply.rj_stat = AUTH_ERROR;
298	rply.rjcted_rply.rj_why = why;
299	SVC_REPLY(xprt, &rply);
300	}
301
302	/*
303	* Auth too weak error reply
304	*/
305	void
306	svcerr_weakauth(xprt)
307	SVCXPRT *xprt;
308	{
309
310	svcerr_auth(xprt, AUTH_TOOWEAK);
311	}
312
313	/*
314	* Program unavailable error reply
315	*/
316	void
317	svcerr_noprog(xprt)
318	register SVCXPRT *xprt;
319	{
320	struct rpc_msg rply;
321
322	rply.rm_direction = REPLY;
323	rply.rm_reply.rp_stat = MSG_ACCEPTED;
324	rply.acpted_rply.ar_verf = xprt->xp_verf;
325	rply.acpted_rply.ar_stat = PROG_UNAVAIL;
326	SVC_REPLY(xprt, &rply);
327	}
328
329	/*
330	* Program version mismatch error reply
331	*/
332	void
333	svcerr_progvers(xprt, low_vers, high_vers)
334	register SVCXPRT *xprt;
335	u_long low_vers;
336	u_long high_vers;
337	{
338	struct rpc_msg rply;
339
340	rply.rm_direction = REPLY;
341	rply.rm_reply.rp_stat = MSG_ACCEPTED;
342	rply.acpted_rply.ar_verf = xprt->xp_verf;
343	rply.acpted_rply.ar_stat = PROG_MISMATCH;
344	rply.acpted_rply.ar_vers.low = low_vers;
345	rply.acpted_rply.ar_vers.high = high_vers;
346	SVC_REPLY(xprt, &rply);
347	}
348
349	/* ***************** SERVER INPUT STUFF ***************** */
350
351	/*
352	* Get server side input from some transport.
353	*
354	* Statement of authentication parameters management:
355	* This function owns and manages all authentication parameters, specifically
356	* the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
357	* the "cooked" credentials (rqst->rq_clntcred).
358	* However, this function does not know the structure of the cooked
359	* credentials, so it make the following assumptions:
360	* a) the structure is contiguous (no pointers), and
361	* b) the cred structure size does not exceed RQCRED_SIZE bytes.
362	* In all events, all three parameters are freed upon exit from this routine.
363	* The storage is trivially management on the call stack in user land, but
364	* is mallocated in kernel land.
365	*/
366
367	void
368	svc_getreq(rdfds)
369	int rdfds;
370	{
371	#ifdef FD_SETSIZE
372	fd_set readfds;
373
374	FD_ZERO(&readfds);
375	readfds.fds_bits[0] = rdfds;
376	svc_getreqset(&readfds);
377	#else
378	int readfds = rdfds & svc_fds;
379
380	svc_getreqset(&readfds);
381	#endif /* def FD_SETSIZE */
382	}
383
384	void
385	svc_getreqset(readfds)
386	#ifdef FD_SETSIZE
387	fd_set *readfds;
388	{
389	#else
390	int *readfds;
391	{
392	int readfds_local = *readfds;
393	#endif /* def FD_SETSIZE */
394	enum xprt_stat stat;
395	struct rpc_msg msg;
396	int prog_found;
397	u_long low_vers;
398	u_long high_vers;
399	struct svc_req r;
400	register SVCXPRT *xprt;
401	register u_long mask;
402	register int bit;
403	register u_long *maskp;
404	register int setsize;
405	register int sock;
406	char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
407	msg.rm_call.cb_cred.oa_base = cred_area;
408	msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
409	r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);
410
411
412	#ifdef FD_SETSIZE
413	setsize = _rpc_dtablesize();
414	maskp = (u_long *)readfds->fds_bits;
415	for (sock = 0; sock < setsize; sock += NFDBITS) {
416	for (mask = *maskp++; bit = ffs(mask); mask ^= (1 << (bit - 1))) {
417	/* sock has input waiting */
418	xprt = xports[sock + bit - 1];
419	#else
420	for (sock = 0; readfds_local != 0; sock++, readfds_local >>= 1) {
421	if ((readfds_local & 1) != 0) {
422	/* sock has input waiting */
423	xprt = xports[sock];
424	#endif /* def FD_SETSIZE */
425	/* now receive msgs from xprtprt (support batch calls) */
426	do {
427	if (SVC_RECV(xprt, &msg)) {
428
429	/* now find the exported program and call it */
430	register struct svc_callout *s;
431	enum auth_stat why;
432
433	r.rq_xprt = xprt;
434	r.rq_prog = msg.rm_call.cb_prog;
435	r.rq_vers = msg.rm_call.cb_vers;
436	r.rq_proc = msg.rm_call.cb_proc;
437	r.rq_cred = msg.rm_call.cb_cred;
438	/* first authenticate the message */
439	if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
440	svcerr_auth(xprt, why);
441	goto call_done;
442	}
443	/* now match message with a registered service*/
444	prog_found = FALSE;
445	low_vers = 0 - 1;
446	high_vers = 0;
447	for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
448	if (s->sc_prog == r.rq_prog) {
449	if (s->sc_vers == r.rq_vers) {
450	(*s->sc_dispatch)(&r, xprt);
451	goto call_done;
452	} /* found correct version */
453	prog_found = TRUE;
454	if (s->sc_vers < low_vers)
455	low_vers = s->sc_vers;
456	if (s->sc_vers > high_vers)
457	high_vers = s->sc_vers;
458	} /* found correct program */
459	}
460	/*
461	* if we got here, the program or version
462	* is not served ...
463	*/
464	if (prog_found)
465	svcerr_progvers(xprt,
466	low_vers, high_vers);
467	else
468	svcerr_noprog(xprt);
469	/* Fall through to ... */
470	}
471	call_done:
472	if ((stat = SVC_STAT(xprt)) == XPRT_DIED){
473	SVC_DESTROY(xprt);
474	break;
475	}
476	} while (stat == XPRT_MOREREQS);
477	}
478	}
479	}