8a16b7a18f
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319 lines
8.7 KiB
C
319 lines
8.7 KiB
C
/* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#if defined(LIBC_SCCS) && !defined(lint)
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#ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
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static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* svc_generic.c, Server side for RPC.
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*
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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 <sys/socket.h>
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#include <netinet/in.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 <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.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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extern int __svc_vc_setflag(SVCXPRT *, int);
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/*
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* The highest level interface for server creation.
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* It tries for all the nettokens in that particular class of token
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* and returns the number of handles it can create and/or find.
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*
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* It creates a link list of all the handles it could create.
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* If svc_create() is called multiple times, it uses the handle
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* created earlier instead of creating a new handle every time.
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*
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* prognum - Program number
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* versnum - Version number
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* nettype - Networktype token
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*/
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int
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svc_create(void (*dispatch)(struct svc_req *, SVCXPRT *),
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rpcprog_t prognum, rpcvers_t versnum, const char *nettype)
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{
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struct xlist {
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SVCXPRT *xprt; /* Server handle */
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struct xlist *next; /* Next item */
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} *l;
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static struct xlist *xprtlist; /* A link list of all the handles */
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int num = 0;
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SVCXPRT *xprt;
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struct netconfig *nconf;
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void *handle;
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/* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */
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if ((handle = __rpc_setconf(nettype)) == NULL) {
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warnx("svc_create: unknown protocol");
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return (0);
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}
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while ((nconf = __rpc_getconf(handle)) != NULL) {
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mutex_lock(&xprtlist_lock);
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for (l = xprtlist; l; l = l->next) {
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if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) {
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/* Found an old one, use it */
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(void) rpcb_unset(prognum, versnum, nconf);
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if (svc_reg(l->xprt, prognum, versnum,
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dispatch, nconf) == FALSE)
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warnx(
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"svc_create: could not register prog %u vers %u on %s",
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(unsigned)prognum, (unsigned)versnum,
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nconf->nc_netid);
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else
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num++;
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break;
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}
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}
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if (l == NULL) {
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/* It was not found. Now create a new one */
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xprt = svc_tp_create(dispatch, prognum, versnum, nconf);
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if (xprt) {
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l = (struct xlist *)malloc(sizeof (*l));
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if (l == NULL) {
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warnx("svc_create: no memory");
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mutex_unlock(&xprtlist_lock);
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num = 0;
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goto done;
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}
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l->xprt = xprt;
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l->next = xprtlist;
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xprtlist = l;
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num++;
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}
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}
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mutex_unlock(&xprtlist_lock);
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}
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done:
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__rpc_endconf(handle);
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/*
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* In case of num == 0; the error messages are generated by the
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* underlying layers; and hence not needed here.
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*/
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return (num);
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}
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/*
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* The high level interface to svc_tli_create().
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* It tries to create a server for "nconf" and registers the service
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* with the rpcbind. It calls svc_tli_create();
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*
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* prognum - Program number
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* versnum - Version number
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* ncofn - Netconfig structure for the network
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*/
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SVCXPRT *
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svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *),
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rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf)
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{
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SVCXPRT *xprt;
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if (nconf == NULL) {
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warnx(
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"svc_tp_create: invalid netconfig structure for prog %u vers %u",
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(unsigned)prognum, (unsigned)versnum);
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return (NULL);
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}
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xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
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if (xprt == NULL) {
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return (NULL);
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}
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/*LINTED const castaway*/
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(void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
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if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
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warnx(
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"svc_tp_create: Could not register prog %u vers %u on %s",
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(unsigned)prognum, (unsigned)versnum,
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nconf->nc_netid);
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SVC_DESTROY(xprt);
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return (NULL);
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}
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return (xprt);
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}
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/*
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* If fd is RPC_ANYFD, then it opens a fd for the given transport
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* provider (nconf cannot be NULL then). If the t_state is T_UNBND and
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* bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
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* NULL bindadr and Connection oriented transports, the value of qlen
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* is set to 8.
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*
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* If sendsz or recvsz are zero, their default values are chosen.
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*
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* fd - Connection end point
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* nconf - Netconfig struct for nettoken
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* bindaddr - Local bind address
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* sendsz - Max sendsize
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* recvxz - Max recvsize
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*/
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SVCXPRT *
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svc_tli_create(int fd, const struct netconfig *nconf,
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const struct t_bind *bindaddr, u_int sendsz, u_int recvsz)
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{
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SVCXPRT *xprt = NULL; /* service handle */
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bool_t madefd = FALSE; /* whether fd opened here */
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struct __rpc_sockinfo si;
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struct sockaddr_storage ss;
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socklen_t slen;
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if (fd == RPC_ANYFD) {
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if (nconf == NULL) {
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warnx("svc_tli_create: invalid netconfig");
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return (NULL);
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}
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fd = __rpc_nconf2fd(nconf);
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if (fd == -1) {
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warnx(
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"svc_tli_create: could not open connection for %s",
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nconf->nc_netid);
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return (NULL);
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}
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__rpc_nconf2sockinfo(nconf, &si);
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madefd = TRUE;
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} else {
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/*
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* It is an open descriptor. Get the transport info.
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*/
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if (!__rpc_fd2sockinfo(fd, &si)) {
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warnx(
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"svc_tli_create: could not get transport information");
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return (NULL);
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}
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}
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/*
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* If the fd is unbound, try to bind it.
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*/
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if (madefd || !__rpc_sockisbound(fd)) {
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if (bindaddr == NULL) {
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if (bindresvport(fd, NULL) < 0) {
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memset(&ss, 0, sizeof ss);
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ss.ss_family = si.si_af;
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ss.ss_len = si.si_alen;
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if (_bind(fd, (struct sockaddr *)(void *)&ss,
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(socklen_t)si.si_alen) < 0) {
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warnx(
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"svc_tli_create: could not bind to anonymous port");
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goto freedata;
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}
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}
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_listen(fd, SOMAXCONN);
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} else {
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if (_bind(fd,
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(struct sockaddr *)bindaddr->addr.buf,
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(socklen_t)si.si_alen) < 0) {
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warnx(
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"svc_tli_create: could not bind to requested address");
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goto freedata;
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}
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_listen(fd, (int)bindaddr->qlen);
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}
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}
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/*
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* call transport specific function.
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*/
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switch (si.si_socktype) {
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case SOCK_STREAM:
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slen = sizeof ss;
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if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
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== 0) {
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/* accepted socket */
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xprt = svc_fd_create(fd, sendsz, recvsz);
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} else
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xprt = svc_vc_create(fd, sendsz, recvsz);
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if (!nconf || !xprt)
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break;
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#if 0
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/* XXX fvdl */
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if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
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strcmp(nconf->nc_protofmly, "inet6") == 0)
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(void) __svc_vc_setflag(xprt, TRUE);
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#endif
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break;
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case SOCK_DGRAM:
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xprt = svc_dg_create(fd, sendsz, recvsz);
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break;
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default:
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warnx("svc_tli_create: bad service type");
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goto freedata;
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}
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if (xprt == NULL)
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/*
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* The error messages here are spitted out by the lower layers:
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* svc_vc_create(), svc_fd_create() and svc_dg_create().
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*/
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goto freedata;
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/* Fill in type of service */
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xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
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if (nconf) {
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xprt->xp_netid = strdup(nconf->nc_netid);
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xprt->xp_tp = strdup(nconf->nc_device);
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}
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return (xprt);
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freedata:
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if (madefd)
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(void)_close(fd);
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if (xprt) {
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if (!madefd) /* so that svc_destroy doesnt close fd */
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xprt->xp_fd = RPC_ANYFD;
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SVC_DESTROY(xprt);
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}
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return (NULL);
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}
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