7d6a21b4d7
1. Added missing function prototypes.
2. Added missing function return types.
3. Added missing function argument types.
4. Added missing headers for system function prototypes.
5. Corrected casts in select() args.
6. Got rid of more "extern int errno" rubbish.
7. Added extra parentheses around assignment used as truth value.
8. Fixed bug in clnt_{tcp, udp}create() where pointers could be free'd
even if they hadn't been successfully malloc()'d.
484 lines
11 KiB
C
484 lines
11 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro";*/
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/*static char *sccsid = "from: @(#)svc.c 2.4 88/08/11 4.0 RPCSRC";*/
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static char *rcsid = "$Id: svc.c,v 1.3 1995/10/22 14:51:34 phk Exp $";
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#endif
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/*
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* svc.c, Server-side remote procedure call interface.
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*
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* There are two sets of procedures here. The xprt routines are
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* for handling transport handles. The svc routines handle the
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* list of service routines.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <sys/errno.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#ifdef FD_SETSIZE
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static SVCXPRT **xports;
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#else
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#define NOFILE 32
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static SVCXPRT *xports[NOFILE];
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#endif /* def FD_SETSIZE */
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#define NULL_SVC ((struct svc_callout *)0)
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#define RQCRED_SIZE 400 /* this size is excessive */
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int _rpc_dtablesize(void);
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/*
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* The services list
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* Each entry represents a set of procedures (an rpc program).
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* The dispatch routine takes request structs and runs the
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* apropriate procedure.
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*/
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static struct svc_callout {
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struct svc_callout *sc_next;
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u_long sc_prog;
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u_long sc_vers;
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void (*sc_dispatch)();
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} *svc_head;
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static struct svc_callout *svc_find();
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/* *************** SVCXPRT related stuff **************** */
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/*
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* Activate a transport handle.
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*/
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void
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xprt_register(xprt)
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SVCXPRT *xprt;
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{
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register int sock = xprt->xp_sock;
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#ifdef FD_SETSIZE
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if (xports == NULL) {
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xports = (SVCXPRT **)
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mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
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}
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if (sock < _rpc_dtablesize()) {
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xports[sock] = xprt;
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FD_SET(sock, &svc_fdset);
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}
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#else
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if (sock < NOFILE) {
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xports[sock] = xprt;
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svc_fds |= (1 << sock);
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}
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#endif /* def FD_SETSIZE */
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}
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/*
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* De-activate a transport handle.
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*/
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void
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xprt_unregister(xprt)
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SVCXPRT *xprt;
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{
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register int sock = xprt->xp_sock;
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#ifdef FD_SETSIZE
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if ((sock < _rpc_dtablesize()) && (xports[sock] == xprt)) {
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xports[sock] = (SVCXPRT *)0;
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FD_CLR(sock, &svc_fdset);
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}
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#else
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if ((sock < NOFILE) && (xports[sock] == xprt)) {
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xports[sock] = (SVCXPRT *)0;
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svc_fds &= ~(1 << sock);
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}
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#endif /* def FD_SETSIZE */
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}
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/* ********************** CALLOUT list related stuff ************* */
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/*
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* Add a service program to the callout list.
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* The dispatch routine will be called when a rpc request for this
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* program number comes in.
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*/
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bool_t
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svc_register(xprt, prog, vers, dispatch, protocol)
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SVCXPRT *xprt;
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u_long prog;
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u_long vers;
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void (*dispatch)();
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int protocol;
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{
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struct svc_callout *prev;
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register struct svc_callout *s;
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if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
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if (s->sc_dispatch == dispatch)
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goto pmap_it; /* he is registering another xptr */
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return (FALSE);
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}
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s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
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if (s == (struct svc_callout *)0) {
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return (FALSE);
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}
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s->sc_prog = prog;
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s->sc_vers = vers;
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s->sc_dispatch = dispatch;
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s->sc_next = svc_head;
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svc_head = s;
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pmap_it:
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/* now register the information with the local binder service */
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if (protocol) {
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return (pmap_set(prog, vers, protocol, xprt->xp_port));
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}
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return (TRUE);
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}
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/*
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* Remove a service program from the callout list.
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*/
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void
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svc_unregister(prog, vers)
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u_long prog;
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u_long vers;
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{
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struct svc_callout *prev;
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register struct svc_callout *s;
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if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
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return;
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if (prev == NULL_SVC) {
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svc_head = s->sc_next;
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} else {
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prev->sc_next = s->sc_next;
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}
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s->sc_next = NULL_SVC;
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mem_free((char *) s, (u_int) sizeof(struct svc_callout));
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/* now unregister the information with the local binder service */
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(void)pmap_unset(prog, vers);
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}
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/*
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* Search the callout list for a program number, return the callout
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* struct.
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*/
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static struct svc_callout *
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svc_find(prog, vers, prev)
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u_long prog;
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u_long vers;
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struct svc_callout **prev;
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{
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register struct svc_callout *s, *p;
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p = NULL_SVC;
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for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
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if ((s->sc_prog == prog) && (s->sc_vers == vers))
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goto done;
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p = s;
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}
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done:
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*prev = p;
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return (s);
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}
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/* ******************* REPLY GENERATION ROUTINES ************ */
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/*
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* Send a reply to an rpc request
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*/
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bool_t
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svc_sendreply(xprt, xdr_results, xdr_location)
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register SVCXPRT *xprt;
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xdrproc_t xdr_results;
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caddr_t xdr_location;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = SUCCESS;
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rply.acpted_rply.ar_results.where = xdr_location;
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rply.acpted_rply.ar_results.proc = xdr_results;
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return (SVC_REPLY(xprt, &rply));
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}
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/*
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* No procedure error reply
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*/
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void
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svcerr_noproc(xprt)
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register SVCXPRT *xprt;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = PROC_UNAVAIL;
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SVC_REPLY(xprt, &rply);
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}
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/*
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* Can't decode args error reply
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*/
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void
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svcerr_decode(xprt)
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register SVCXPRT *xprt;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = GARBAGE_ARGS;
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SVC_REPLY(xprt, &rply);
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}
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/*
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* Some system error
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*/
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void
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svcerr_systemerr(xprt)
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register SVCXPRT *xprt;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = SYSTEM_ERR;
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SVC_REPLY(xprt, &rply);
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}
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/*
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* Authentication error reply
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*/
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void
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svcerr_auth(xprt, why)
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SVCXPRT *xprt;
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enum auth_stat why;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_DENIED;
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rply.rjcted_rply.rj_stat = AUTH_ERROR;
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rply.rjcted_rply.rj_why = why;
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SVC_REPLY(xprt, &rply);
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}
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/*
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* Auth too weak error reply
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*/
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void
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svcerr_weakauth(xprt)
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SVCXPRT *xprt;
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{
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svcerr_auth(xprt, AUTH_TOOWEAK);
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}
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/*
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* Program unavailable error reply
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*/
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void
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svcerr_noprog(xprt)
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register SVCXPRT *xprt;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = PROG_UNAVAIL;
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SVC_REPLY(xprt, &rply);
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}
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/*
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* Program version mismatch error reply
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*/
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void
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svcerr_progvers(xprt, low_vers, high_vers)
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register SVCXPRT *xprt;
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u_long low_vers;
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u_long high_vers;
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{
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struct rpc_msg rply;
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rply.rm_direction = REPLY;
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rply.rm_reply.rp_stat = MSG_ACCEPTED;
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rply.acpted_rply.ar_verf = xprt->xp_verf;
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rply.acpted_rply.ar_stat = PROG_MISMATCH;
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rply.acpted_rply.ar_vers.low = low_vers;
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rply.acpted_rply.ar_vers.high = high_vers;
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SVC_REPLY(xprt, &rply);
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}
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/* ******************* SERVER INPUT STUFF ******************* */
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/*
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* Get server side input from some transport.
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*
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* Statement of authentication parameters management:
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* This function owns and manages all authentication parameters, specifically
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* the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
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* the "cooked" credentials (rqst->rq_clntcred).
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* However, this function does not know the structure of the cooked
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* credentials, so it make the following assumptions:
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* a) the structure is contiguous (no pointers), and
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* b) the cred structure size does not exceed RQCRED_SIZE bytes.
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* In all events, all three parameters are freed upon exit from this routine.
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* The storage is trivially management on the call stack in user land, but
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* is mallocated in kernel land.
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*/
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void
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svc_getreq(rdfds)
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int rdfds;
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{
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#ifdef FD_SETSIZE
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fd_set readfds;
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FD_ZERO(&readfds);
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readfds.fds_bits[0] = rdfds;
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svc_getreqset(&readfds);
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#else
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int readfds = rdfds & svc_fds;
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svc_getreqset(&readfds);
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#endif /* def FD_SETSIZE */
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}
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void
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svc_getreqset(readfds)
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#ifdef FD_SETSIZE
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fd_set *readfds;
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{
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#else
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int *readfds;
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{
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int readfds_local = *readfds;
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#endif /* def FD_SETSIZE */
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enum xprt_stat stat;
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struct rpc_msg msg;
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int prog_found;
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u_long low_vers;
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u_long high_vers;
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struct svc_req r;
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register SVCXPRT *xprt;
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register u_long mask;
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register int bit;
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register u_long *maskp;
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register int setsize;
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register int sock;
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char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
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msg.rm_call.cb_cred.oa_base = cred_area;
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msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
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r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);
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#ifdef FD_SETSIZE
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setsize = _rpc_dtablesize();
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maskp = (u_long *)readfds->fds_bits;
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for (sock = 0; sock < setsize; sock += NFDBITS) {
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for (mask = *maskp++; bit = ffs(mask); mask ^= (1 << (bit - 1))) {
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/* sock has input waiting */
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xprt = xports[sock + bit - 1];
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#else
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for (sock = 0; readfds_local != 0; sock++, readfds_local >>= 1) {
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if ((readfds_local & 1) != 0) {
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/* sock has input waiting */
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xprt = xports[sock];
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#endif /* def FD_SETSIZE */
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/* now receive msgs from xprtprt (support batch calls) */
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do {
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if (SVC_RECV(xprt, &msg)) {
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/* now find the exported program and call it */
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register struct svc_callout *s;
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enum auth_stat why;
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r.rq_xprt = xprt;
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r.rq_prog = msg.rm_call.cb_prog;
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r.rq_vers = msg.rm_call.cb_vers;
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r.rq_proc = msg.rm_call.cb_proc;
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r.rq_cred = msg.rm_call.cb_cred;
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/* first authenticate the message */
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if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
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svcerr_auth(xprt, why);
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goto call_done;
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}
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/* now match message with a registered service*/
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prog_found = FALSE;
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low_vers = 0 - 1;
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high_vers = 0;
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for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
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if (s->sc_prog == r.rq_prog) {
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if (s->sc_vers == r.rq_vers) {
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(*s->sc_dispatch)(&r, xprt);
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goto call_done;
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} /* found correct version */
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prog_found = TRUE;
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if (s->sc_vers < low_vers)
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low_vers = s->sc_vers;
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if (s->sc_vers > high_vers)
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high_vers = s->sc_vers;
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} /* found correct program */
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}
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/*
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* if we got here, the program or version
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* is not served ...
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*/
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if (prog_found)
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svcerr_progvers(xprt,
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low_vers, high_vers);
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else
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svcerr_noprog(xprt);
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/* Fall through to ... */
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}
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call_done:
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if ((stat = SVC_STAT(xprt)) == XPRT_DIED){
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SVC_DESTROY(xprt);
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break;
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}
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} while (stat == XPRT_MOREREQS);
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}
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}
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}
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