svc_generic.c revision 288113
174462Salfred/* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */ 274462Salfred 3258578Shrs/*- 4258578Shrs * Copyright (c) 2009, Sun Microsystems, Inc. 5258578Shrs * All rights reserved. 6258578Shrs * 7258578Shrs * Redistribution and use in source and binary forms, with or without 8258578Shrs * modification, are permitted provided that the following conditions are met: 9258578Shrs * - Redistributions of source code must retain the above copyright notice, 10258578Shrs * this list of conditions and the following disclaimer. 11258578Shrs * - Redistributions in binary form must reproduce the above copyright notice, 12258578Shrs * this list of conditions and the following disclaimer in the documentation 13258578Shrs * and/or other materials provided with the distribution. 14258578Shrs * - Neither the name of Sun Microsystems, Inc. nor the names of its 15258578Shrs * contributors may be used to endorse or promote products derived 16258578Shrs * from this software without specific prior written permission. 1774462Salfred * 18258578Shrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19258578Shrs * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20258578Shrs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21258578Shrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22258578Shrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23258578Shrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24258578Shrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25258578Shrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26258578Shrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27258578Shrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28258578Shrs * POSSIBILITY OF SUCH DAMAGE. 2974462Salfred */ 3074462Salfred 3174462Salfred/* 3274462Salfred * Copyright (c) 1986-1991 by Sun Microsystems Inc. 3374462Salfred */ 3474462Salfred 35136581Sobrien#if defined(LIBC_SCCS) && !defined(lint) 36136581Sobrien#ident "@(#)svc_generic.c 1.19 94/04/24 SMI" 3774462Salfredstatic char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro"; 3874462Salfred#endif 3992990Sobrien#include <sys/cdefs.h> 4092990Sobrien__FBSDID("$FreeBSD: head/lib/libc/rpc/svc_generic.c 288113 2015-09-22 15:40:07Z rodrigc $"); 4174462Salfred 4274462Salfred/* 4374462Salfred * svc_generic.c, Server side for RPC. 4474462Salfred * 4574462Salfred */ 4674462Salfred 4775094Siedowse#include "namespace.h" 4874462Salfred#include "reentrant.h" 4974462Salfred#include <sys/types.h> 5074462Salfred#include <sys/socket.h> 5174462Salfred#include <netinet/in.h> 5274462Salfred#include <rpc/rpc.h> 5374462Salfred#include <rpc/nettype.h> 5474462Salfred#include <stdio.h> 5574462Salfred#include <errno.h> 5674462Salfred#include <stdlib.h> 5774462Salfred#include <string.h> 5874462Salfred#include <unistd.h> 5974462Salfred#include <err.h> 6074462Salfred#include "un-namespace.h" 6174462Salfred 6274462Salfred#include "rpc_com.h" 63156090Sdeischen#include "mt_misc.h" 6474462Salfred 6592905Sobrienextern int __svc_vc_setflag(SVCXPRT *, int); 6674462Salfred 6774462Salfred/* 6874462Salfred * The highest level interface for server creation. 6974462Salfred * It tries for all the nettokens in that particular class of token 7074462Salfred * and returns the number of handles it can create and/or find. 7174462Salfred * 7274462Salfred * It creates a link list of all the handles it could create. 7374462Salfred * If svc_create() is called multiple times, it uses the handle 7474462Salfred * created earlier instead of creating a new handle every time. 75288113Srodrigc * 76288113Srodrigc * prognum - Program number 77288113Srodrigc * versnum - Version number 78288113Srodrigc * nettype - Networktype token 7974462Salfred */ 8074462Salfredint 81288113Srodrigcsvc_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 82288113Srodrigc rpcprog_t prognum, rpcvers_t versnum, const char *nettype) 8374462Salfred{ 8474462Salfred struct xlist { 8574462Salfred SVCXPRT *xprt; /* Server handle */ 8674462Salfred struct xlist *next; /* Next item */ 8774462Salfred } *l; 8874462Salfred static struct xlist *xprtlist; /* A link list of all the handles */ 8974462Salfred int num = 0; 9074462Salfred SVCXPRT *xprt; 9174462Salfred struct netconfig *nconf; 9274462Salfred void *handle; 9374462Salfred 9474462Salfred/* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */ 9574462Salfred 9674462Salfred if ((handle = __rpc_setconf(nettype)) == NULL) { 9774462Salfred warnx("svc_create: unknown protocol"); 9874462Salfred return (0); 9974462Salfred } 10074462Salfred while ((nconf = __rpc_getconf(handle)) != NULL) { 10174462Salfred mutex_lock(&xprtlist_lock); 10274462Salfred for (l = xprtlist; l; l = l->next) { 10374462Salfred if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) { 10474462Salfred /* Found an old one, use it */ 10574462Salfred (void) rpcb_unset(prognum, versnum, nconf); 10674462Salfred if (svc_reg(l->xprt, prognum, versnum, 10774462Salfred dispatch, nconf) == FALSE) 10874462Salfred warnx( 10974462Salfred "svc_create: could not register prog %u vers %u on %s", 11074462Salfred (unsigned)prognum, (unsigned)versnum, 11174462Salfred nconf->nc_netid); 11274462Salfred else 11374462Salfred num++; 11474462Salfred break; 11574462Salfred } 11674462Salfred } 11774462Salfred if (l == NULL) { 11874462Salfred /* It was not found. Now create a new one */ 11974462Salfred xprt = svc_tp_create(dispatch, prognum, versnum, nconf); 12074462Salfred if (xprt) { 12174462Salfred l = (struct xlist *)malloc(sizeof (*l)); 12274462Salfred if (l == NULL) { 12374462Salfred warnx("svc_create: no memory"); 12474462Salfred mutex_unlock(&xprtlist_lock); 12574462Salfred return (0); 12674462Salfred } 12774462Salfred l->xprt = xprt; 12874462Salfred l->next = xprtlist; 12974462Salfred xprtlist = l; 13074462Salfred num++; 13174462Salfred } 13274462Salfred } 13374462Salfred mutex_unlock(&xprtlist_lock); 13474462Salfred } 13574462Salfred __rpc_endconf(handle); 13674462Salfred /* 13774462Salfred * In case of num == 0; the error messages are generated by the 13874462Salfred * underlying layers; and hence not needed here. 13974462Salfred */ 14074462Salfred return (num); 14174462Salfred} 14274462Salfred 14374462Salfred/* 14474462Salfred * The high level interface to svc_tli_create(). 14574462Salfred * It tries to create a server for "nconf" and registers the service 14674462Salfred * with the rpcbind. It calls svc_tli_create(); 147288113Srodrigc * 148288113Srodrigc * prognum - Program number 149288113Srodrigc * versnum - Version number 150288113Srodrigc * ncofn - Netconfig structure for the network 15174462Salfred */ 15274462SalfredSVCXPRT * 153288113Srodrigcsvc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 154288113Srodrigc rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf) 15574462Salfred{ 15674462Salfred SVCXPRT *xprt; 15774462Salfred 15874462Salfred if (nconf == NULL) { 15974462Salfred warnx( 16074462Salfred "svc_tp_create: invalid netconfig structure for prog %u vers %u", 16174462Salfred (unsigned)prognum, (unsigned)versnum); 16274462Salfred return (NULL); 16374462Salfred } 16474462Salfred xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 16574462Salfred if (xprt == NULL) { 16674462Salfred return (NULL); 16774462Salfred } 16874462Salfred /*LINTED const castaway*/ 16974462Salfred (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 17074462Salfred if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 17174462Salfred warnx( 17274462Salfred "svc_tp_create: Could not register prog %u vers %u on %s", 17374462Salfred (unsigned)prognum, (unsigned)versnum, 17474462Salfred nconf->nc_netid); 17574462Salfred SVC_DESTROY(xprt); 17674462Salfred return (NULL); 17774462Salfred } 17874462Salfred return (xprt); 17974462Salfred} 18074462Salfred 18174462Salfred/* 18274462Salfred * If fd is RPC_ANYFD, then it opens a fd for the given transport 18374462Salfred * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 18474462Salfred * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 18574462Salfred * NULL bindadr and Connection oriented transports, the value of qlen 18674462Salfred * is set to 8. 18774462Salfred * 18874462Salfred * If sendsz or recvsz are zero, their default values are chosen. 189288113Srodrigc * 190288113Srodrigc * fd - Connection end point 191288113Srodrigc * nconf - Netconfig struct for nettoken 192288113Srodrigc * bindaddr - Local bind address 193288113Srodrigc * sendsz - Max sendsize 194288113Srodrigc * recvxz - Max recvsize 19574462Salfred */ 19674462SalfredSVCXPRT * 197288113Srodrigcsvc_tli_create(int fd, const struct netconfig *nconf, 198288113Srodrigc const struct t_bind *bindaddr, u_int sendsz, u_int recvsz) 19974462Salfred{ 20074462Salfred SVCXPRT *xprt = NULL; /* service handle */ 20174462Salfred bool_t madefd = FALSE; /* whether fd opened here */ 20274462Salfred struct __rpc_sockinfo si; 20374462Salfred struct sockaddr_storage ss; 20474462Salfred socklen_t slen; 20574462Salfred 20674462Salfred if (fd == RPC_ANYFD) { 20774462Salfred if (nconf == NULL) { 20874462Salfred warnx("svc_tli_create: invalid netconfig"); 20974462Salfred return (NULL); 21074462Salfred } 21174462Salfred fd = __rpc_nconf2fd(nconf); 21274462Salfred if (fd == -1) { 21374462Salfred warnx( 21474462Salfred "svc_tli_create: could not open connection for %s", 21574462Salfred nconf->nc_netid); 21674462Salfred return (NULL); 21774462Salfred } 21874462Salfred __rpc_nconf2sockinfo(nconf, &si); 21974462Salfred madefd = TRUE; 22074462Salfred } else { 22174462Salfred /* 22274462Salfred * It is an open descriptor. Get the transport info. 22374462Salfred */ 22474462Salfred if (!__rpc_fd2sockinfo(fd, &si)) { 22574462Salfred warnx( 22674462Salfred "svc_tli_create: could not get transport information"); 22774462Salfred return (NULL); 22874462Salfred } 22974462Salfred } 23074462Salfred 23174462Salfred /* 23274462Salfred * If the fd is unbound, try to bind it. 23374462Salfred */ 23474462Salfred if (madefd || !__rpc_sockisbound(fd)) { 23574462Salfred if (bindaddr == NULL) { 23674462Salfred if (bindresvport(fd, NULL) < 0) { 23774462Salfred memset(&ss, 0, sizeof ss); 23874462Salfred ss.ss_family = si.si_af; 23974462Salfred ss.ss_len = si.si_alen; 24074462Salfred if (_bind(fd, (struct sockaddr *)(void *)&ss, 24174462Salfred (socklen_t)si.si_alen) < 0) { 24274462Salfred warnx( 24374462Salfred "svc_tli_create: could not bind to anonymous port"); 24474462Salfred goto freedata; 24574462Salfred } 24674462Salfred } 24774462Salfred _listen(fd, SOMAXCONN); 24874462Salfred } else { 24974462Salfred if (_bind(fd, 250115133Smbr (struct sockaddr *)bindaddr->addr.buf, 25174462Salfred (socklen_t)si.si_alen) < 0) { 25274462Salfred warnx( 25374462Salfred "svc_tli_create: could not bind to requested address"); 25474462Salfred goto freedata; 25574462Salfred } 25674462Salfred _listen(fd, (int)bindaddr->qlen); 25774462Salfred } 25874462Salfred 25974462Salfred } 26074462Salfred /* 26174462Salfred * call transport specific function. 26274462Salfred */ 26374462Salfred switch (si.si_socktype) { 26474462Salfred case SOCK_STREAM: 26574462Salfred slen = sizeof ss; 26674462Salfred if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 26774462Salfred == 0) { 26874462Salfred /* accepted socket */ 26974462Salfred xprt = svc_fd_create(fd, sendsz, recvsz); 27074462Salfred } else 27174462Salfred xprt = svc_vc_create(fd, sendsz, recvsz); 27274462Salfred if (!nconf || !xprt) 27374462Salfred break; 27474462Salfred#if 0 27574462Salfred /* XXX fvdl */ 27674462Salfred if (strcmp(nconf->nc_protofmly, "inet") == 0 || 27774462Salfred strcmp(nconf->nc_protofmly, "inet6") == 0) 27874462Salfred (void) __svc_vc_setflag(xprt, TRUE); 27974462Salfred#endif 28074462Salfred break; 28174462Salfred case SOCK_DGRAM: 28274462Salfred xprt = svc_dg_create(fd, sendsz, recvsz); 28374462Salfred break; 28474462Salfred default: 28574462Salfred warnx("svc_tli_create: bad service type"); 28674462Salfred goto freedata; 28774462Salfred } 28874462Salfred 28974462Salfred if (xprt == NULL) 29074462Salfred /* 29174462Salfred * The error messages here are spitted out by the lower layers: 29274462Salfred * svc_vc_create(), svc_fd_create() and svc_dg_create(). 29374462Salfred */ 29474462Salfred goto freedata; 29574462Salfred 29674462Salfred /* Fill in type of service */ 29774462Salfred xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 29874462Salfred 29974462Salfred if (nconf) { 30074462Salfred xprt->xp_netid = strdup(nconf->nc_netid); 30174462Salfred xprt->xp_tp = strdup(nconf->nc_device); 30274462Salfred } 30374462Salfred return (xprt); 30474462Salfred 30574462Salfredfreedata: 30674462Salfred if (madefd) 30774462Salfred (void)_close(fd); 30874462Salfred if (xprt) { 30974462Salfred if (!madefd) /* so that svc_destroy doesnt close fd */ 31074462Salfred xprt->xp_fd = RPC_ANYFD; 31174462Salfred SVC_DESTROY(xprt); 31274462Salfred } 31374462Salfred return (NULL); 31474462Salfred} 315