311 lines
8.7 KiB
C
311 lines
8.7 KiB
C
/* $NetBSD: svc_simple.c,v 1.20 2000/07/06 03:10:35 christos Exp $ */
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/*-
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 through 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 "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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <err.h>
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#include "un-namespace.h"
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#include "rpc_com.h"
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#include "mt_misc.h"
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static void universal(struct svc_req *, SVCXPRT *);
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static struct proglst {
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char *(*p_progname)(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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* prognum - program number
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* versnum - version number
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* procnum - procedure number
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* progname - Server routine
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* inproc, outproc - in/out XDR procedures
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* nettype - nettype
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*/
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int
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rpc_reg(rpcprog_t prognum, rpcvers_t versnum, rpcproc_t procnum,
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char *(*progname)(char *), xdrproc_t inproc, xdrproc_t outproc,
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char *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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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 = "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 = 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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}
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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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free(xdrbuf);
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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 can't 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(struct svc_req *rqstp, 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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/*
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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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