328 lines
8.8 KiB
C
328 lines
8.8 KiB
C
/* $NetBSD: svc_simple.c,v 1.29 2006/03/21 23:58:24 christos Exp $ */
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/*
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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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/*
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* Copyright (c) 1986-1991 by Sun Microsystems Inc.
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*/
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/* #pragma ident "@(#)svc_simple.c 1.18 94/04/24 SMI" */
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/*
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* svc_simple.c
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* Simplified front end to rpc.
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*/
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/*
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* This interface creates a virtual listener for all the services
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* started thru rpc_reg(). It listens on the same endpoint for
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* all the services and then executes the corresponding service
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* for the given prognum and procnum.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: svc_simple.c,v 1.29 2006/03/21 23:58:24 christos Exp $");
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#endif
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#include "namespace.h"
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#include "reentrant.h"
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#include <sys/types.h>
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#include <rpc/rpc.h>
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#include <rpc/nettype.h>
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#include <assert.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rpc_internal.h"
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#ifdef __weak_alias
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__weak_alias(rpc_reg,_rpc_reg)
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#endif
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static void universal __P((struct svc_req *, SVCXPRT *));
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static struct proglst {
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char *(*p_progname) __P((char *));
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rpcprog_t p_prognum;
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rpcvers_t p_versnum;
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rpcproc_t p_procnum;
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SVCXPRT *p_transp;
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char *p_netid;
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char *p_xdrbuf;
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int p_recvsz;
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xdrproc_t p_inproc, p_outproc;
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struct proglst *p_nxt;
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} *proglst;
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static const char rpc_reg_err[] = "%s: %s";
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static const char rpc_reg_msg[] = "rpc_reg: ";
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static const char __reg_err1[] = "can't find appropriate transport";
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static const char __reg_err2[] = "can't get protocol info";
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static const char __reg_err3[] = "unsupported transport size";
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static const char __no_mem_str[] = "out of memory";
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/*
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* For simplified, easy to use kind of rpc interfaces.
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* nettype indicates the type of transport on which the service will be
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* listening. Used for conservation of the system resource. Only one
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* handle is created for all the services (actually one of each netid)
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* and same xdrbuf is used for same netid. The size of the arguments
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* is also limited by the recvsize for that transport, even if it is
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* a COTS transport. This may be wrong, but for cases like these, they
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* should not use the simplified interfaces like this.
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*/
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int
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rpc_reg(prognum, versnum, procnum, progname, inproc, outproc, nettype)
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rpcprog_t prognum; /* program number */
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rpcvers_t versnum; /* version number */
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rpcproc_t procnum; /* procedure number */
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char *(*progname) __P((char *)); /* Server routine */
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xdrproc_t inproc, outproc; /* in/out XDR procedures */
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char *nettype; /* nettype */
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{
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struct netconfig *nconf;
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int done = FALSE;
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void *handle;
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#ifdef _REENTRANT
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extern mutex_t proglst_lock;
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#endif
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if (procnum == NULLPROC) {
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warnx("%s can't reassign procedure number %u", rpc_reg_msg,
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NULLPROC);
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return (-1);
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}
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if (nettype == NULL)
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nettype = __UNCONST("netpath"); /* The default behavior */
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if ((handle = __rpc_setconf(nettype)) == NULL) {
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warnx(rpc_reg_err, rpc_reg_msg, __reg_err1);
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return (-1);
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}
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/* VARIABLES PROTECTED BY proglst_lock: proglst */
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mutex_lock(&proglst_lock);
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while ((nconf = __rpc_getconf(handle)) != NULL) {
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struct proglst *pl;
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SVCXPRT *svcxprt;
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int madenow;
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u_int recvsz;
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char *xdrbuf;
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char *netid;
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madenow = FALSE;
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svcxprt = NULL;
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recvsz = 0;
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xdrbuf = NULL;
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netid = NULL;
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for (pl = proglst; pl; pl = pl->p_nxt)
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if (strcmp(pl->p_netid, nconf->nc_netid) == 0) {
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svcxprt = pl->p_transp;
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xdrbuf = pl->p_xdrbuf;
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recvsz = pl->p_recvsz;
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netid = pl->p_netid;
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break;
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}
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if (svcxprt == NULL) {
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struct __rpc_sockinfo si;
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svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
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if (svcxprt == NULL)
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continue;
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if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) {
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warnx(rpc_reg_err, rpc_reg_msg, __reg_err2);
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SVC_DESTROY(svcxprt);
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continue;
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}
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recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0);
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if (recvsz == 0) {
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warnx(rpc_reg_err, rpc_reg_msg, __reg_err3);
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SVC_DESTROY(svcxprt);
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continue;
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}
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if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) ||
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((netid = strdup(nconf->nc_netid)) == NULL)) {
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warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str);
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if (xdrbuf != NULL)
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free(xdrbuf);
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if (netid != NULL)
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free(netid);
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SVC_DESTROY(svcxprt);
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break;
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}
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madenow = TRUE;
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}
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/*
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* Check if this (program, version, netid) had already been
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* registered. The check may save a few RPC calls to rpcbind
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*/
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for (pl = proglst; pl; pl = pl->p_nxt)
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if ((pl->p_prognum == prognum) &&
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(pl->p_versnum == versnum) &&
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(strcmp(pl->p_netid, netid) == 0))
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break;
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if (pl == NULL) { /* Not yet */
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(void) rpcb_unset(prognum, versnum, nconf);
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} else {
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/* so that svc_reg does not call rpcb_set() */
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nconf = NULL;
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}
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if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) {
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warnx("%s couldn't register prog %u vers %u for %s",
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rpc_reg_msg, (unsigned)prognum,
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(unsigned)versnum, netid);
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if (madenow) {
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SVC_DESTROY(svcxprt);
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free(xdrbuf);
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free(netid);
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}
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continue;
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}
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pl = malloc(sizeof (struct proglst));
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if (pl == NULL) {
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warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str);
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if (madenow) {
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SVC_DESTROY(svcxprt);
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free(xdrbuf);
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free(netid);
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}
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break;
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}
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pl->p_progname = progname;
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pl->p_prognum = prognum;
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pl->p_versnum = versnum;
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pl->p_procnum = procnum;
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pl->p_inproc = inproc;
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pl->p_outproc = outproc;
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pl->p_transp = svcxprt;
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pl->p_xdrbuf = xdrbuf;
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pl->p_recvsz = recvsz;
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pl->p_netid = netid;
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pl->p_nxt = proglst;
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proglst = pl;
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done = TRUE;
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}
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__rpc_endconf(handle);
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mutex_unlock(&proglst_lock);
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if (done == FALSE) {
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warnx("%s cant find suitable transport for %s",
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rpc_reg_msg, nettype);
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return (-1);
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}
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return (0);
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}
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/*
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* The universal handler for the services registered using registerrpc.
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* It handles both the connectionless and the connection oriented cases.
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*/
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static void
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universal(rqstp, transp)
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struct svc_req *rqstp;
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SVCXPRT *transp;
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{
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rpcprog_t prog;
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rpcvers_t vers;
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rpcproc_t proc;
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char *outdata;
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char *xdrbuf;
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struct proglst *pl;
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#ifdef _REENTRANT
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extern mutex_t proglst_lock;
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#endif
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_DIAGASSERT(rqstp != NULL);
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_DIAGASSERT(transp != NULL);
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/*
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* enforce "procnum 0 is echo" convention
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*/
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if (rqstp->rq_proc == NULLPROC) {
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if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) ==
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FALSE) {
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warnx("svc_sendreply failed");
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}
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return;
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}
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prog = rqstp->rq_prog;
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vers = rqstp->rq_vers;
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proc = rqstp->rq_proc;
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mutex_lock(&proglst_lock);
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for (pl = proglst; pl; pl = pl->p_nxt)
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if (pl->p_prognum == prog && pl->p_procnum == proc &&
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pl->p_versnum == vers &&
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(strcmp(pl->p_netid, transp->xp_netid) == 0)) {
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/* decode arguments into a CLEAN buffer */
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xdrbuf = pl->p_xdrbuf;
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/* Zero the arguments: reqd ! */
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(void) memset(xdrbuf, 0, (size_t)pl->p_recvsz);
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/*
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* Assuming that sizeof (xdrbuf) would be enough
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* for the arguments; if not then the program
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* may bomb. BEWARE!
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*/
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if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
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svcerr_decode(transp);
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mutex_unlock(&proglst_lock);
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return;
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}
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outdata = (*(pl->p_progname))(xdrbuf);
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if (outdata == NULL &&
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pl->p_outproc != (xdrproc_t) xdr_void){
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/* there was an error */
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mutex_unlock(&proglst_lock);
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return;
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}
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if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
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warnx(
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"rpc: rpc_reg trouble replying to prog %u vers %u",
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(unsigned)prog, (unsigned)vers);
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mutex_unlock(&proglst_lock);
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return;
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}
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/* free the decoded arguments */
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(void) svc_freeargs(transp, pl->p_inproc, xdrbuf);
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mutex_unlock(&proglst_lock);
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return;
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}
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mutex_unlock(&proglst_lock);
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/* This should never happen */
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warnx("rpc: rpc_reg: never registered prog %u vers %u",
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(unsigned)prog, (unsigned)vers);
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return;
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}
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