/* $NetBSD: clnt_simple.c,v 1.33 2015/01/20 18:31:25 christos Exp $ */ /* * Copyright (c) 2010, Oracle America, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of the "Oracle America, Inc." nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1986-1991 by Sun Microsystems Inc. */ /* #ident "@(#)clnt_simple.c 1.17 94/04/24 SMI" */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)clnt_simple.c 1.49 89/01/31 Copyr 1984 Sun Micro"; #else __RCSID("$NetBSD: clnt_simple.c,v 1.33 2015/01/20 18:31:25 christos Exp $"); #endif #endif /* * clnt_simple.c * Simplified front end to client rpc. * */ #include "namespace.h" #include "reentrant.h" #include #include #include #include #include #include #include #include #include #ifdef __weak_alias __weak_alias(rpc_call,_rpc_call) #endif #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 64 #endif #ifndef NETIDLEN #define NETIDLEN 32 #endif struct rpc_call_private { int valid; /* Is this entry valid ? */ CLIENT *client; /* Client handle */ pid_t pid; /* process-id at moment of creation */ rpcprog_t prognum; /* Program */ rpcvers_t versnum; /* Version */ char host[MAXHOSTNAMELEN]; /* Servers host */ char nettype[NETIDLEN]; /* Network type */ }; static struct rpc_call_private *rpc_call_private_main; #ifdef _REENTRANT static void rpc_call_destroy(void *); static void rpc_call_destroy(void *vp) { struct rpc_call_private *rcp = (struct rpc_call_private *)vp; if (rcp) { if (rcp->client) CLNT_DESTROY(rcp->client); free(rcp); } } static thread_key_t rpc_call_key; static once_t rpc_call_once = ONCE_INITIALIZER; static void rpc_call_setup(void) { thr_keycreate(&rpc_call_key, rpc_call_destroy); } #endif /* * This is the simplified interface to the client rpc layer. * The client handle is not destroyed here and is reused for * the future calls to same prog, vers, host and nettype combination. * * The total time available is 25 seconds. */ enum clnt_stat rpc_call( const char * host, /* host name */ rpcprog_t prognum, /* program number */ rpcvers_t versnum, /* version number */ rpcproc_t procnum, /* procedure number */ xdrproc_t inproc, /* in XDR procedures */ const char * in, /* recv data */ xdrproc_t outproc, /* out XDR procedures */ char * out, /* send data */ const char * nettype) /* nettype */ { struct rpc_call_private *rcp = (struct rpc_call_private *) 0; enum clnt_stat clnt_stat; struct timeval timeout, tottimeout; _DIAGASSERT(host != NULL); /* XXX: in may be NULL ??? */ /* XXX: out may be NULL ??? */ /* XXX: nettype may be NULL ??? */ #ifdef _REENTRANT if (__isthreaded) { thr_once(&rpc_call_once, rpc_call_setup); rcp = thr_getspecific(rpc_call_key); } else #endif rcp = rpc_call_private_main; if (rcp == NULL) { rcp = malloc(sizeof (*rcp)); if (rcp == NULL) { rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = errno; return (rpc_createerr.cf_stat); } #ifdef _REENTRANT if (__isthreaded) thr_setspecific(rpc_call_key, (void *) rcp); else #endif rpc_call_private_main = rcp; rcp->valid = 0; rcp->client = NULL; } if ((nettype == NULL) || (nettype[0] == 0)) nettype = "netpath"; if (!(rcp->valid && rcp->pid == getpid() && (rcp->prognum == prognum) && (rcp->versnum == versnum) && (!strcmp(rcp->host, host)) && (!strcmp(rcp->nettype, nettype)))) { int fd; rcp->valid = 0; if (rcp->client) CLNT_DESTROY(rcp->client); /* * Using the first successful transport for that type */ rcp->client = clnt_create(host, prognum, versnum, nettype); rcp->pid = getpid(); if (rcp->client == NULL) { return (rpc_createerr.cf_stat); } /* * Set time outs for connectionless case. Do it * unconditionally. Faster than doing a t_getinfo() * and then doing the right thing. */ timeout.tv_usec = 0; timeout.tv_sec = 5; (void) CLNT_CONTROL(rcp->client, CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) (void)fcntl(fd, F_SETFD, FD_CLOEXEC); rcp->prognum = prognum; rcp->versnum = versnum; if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && (strlen(nettype) < (size_t)NETIDLEN)) { (void) strcpy(rcp->host, host); (void) strcpy(rcp->nettype, nettype); rcp->valid = 1; } else { rcp->valid = 0; } } /* else reuse old client */ tottimeout.tv_sec = 25; tottimeout.tv_usec = 0; clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, in, outproc, out, tottimeout); /* * if call failed, empty cache */ if (clnt_stat != RPC_SUCCESS) rcp->valid = 0; return (clnt_stat); }