/* @(#)clnt_generic.c 2.2 88/08/01 4.0 RPCSRC */ /* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if !defined(lint) && defined(SCCSIDS) static char sccsid[] = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI"; #endif /* * Copyright (C) 1987, Sun Microsystems, Inc. */ #include <alloca.h> #include <errno.h> #include <string.h> #include <rpc/rpc.h> #include <sys/socket.h> #include <sys/errno.h> #include <netdb.h> /* * Generic client creation: takes (hostname, program-number, protocol) and * returns client handle. Default options are set, which the user can * change using the rpc equivalent of ioctl()'s. */ CLIENT * clnt_create (const char *hostname, u_long prog, u_long vers, const char *proto) { struct hostent hostbuf, *h; size_t hstbuflen; char *hsttmpbuf; struct protoent protobuf, *p; size_t prtbuflen; char *prttmpbuf; struct sockaddr_in sin; struct sockaddr_un sun; int sock; struct timeval tv; CLIENT *client; int herr; if (strcmp (proto, "unix") == 0) { __bzero ((char *)&sun, sizeof (sun)); sun.sun_family = AF_UNIX; strcpy (sun.sun_path, hostname); sock = RPC_ANYSOCK; client = clntunix_create (&sun, prog, vers, &sock, 0, 0); if (client == NULL) return NULL; tv.tv_sec = 25; tv.tv_usec = 0; clnt_control (client, CLSET_TIMEOUT, (char *)&tv); return client; } hstbuflen = 1024; hsttmpbuf = __alloca (hstbuflen); while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen, &h, &herr) < 0) if (herr != NETDB_INTERNAL || errno != ERANGE) { rpc_createerr.cf_stat = RPC_UNKNOWNHOST; return NULL; } else { /* Enlarge the buffer. */ hstbuflen *= 2; hsttmpbuf = __alloca (hstbuflen); } if (h->h_addrtype != AF_INET) { /* * Only support INET for now */ rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = EAFNOSUPPORT; return NULL; } sin.sin_family = h->h_addrtype; sin.sin_port = 0; __bzero (sin.sin_zero, sizeof (sin.sin_zero)); bcopy (h->h_addr, (char *) &sin.sin_addr, h->h_length); prtbuflen = 1024; prttmpbuf = __alloca (prtbuflen); while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p) < 0) if (errno != ERANGE) { rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; return NULL; } else { /* Enlarge the buffer. */ prtbuflen *= 2; prttmpbuf = __alloca (prtbuflen); } sock = RPC_ANYSOCK; switch (p->p_proto) { case IPPROTO_UDP: tv.tv_sec = 5; tv.tv_usec = 0; client = clntudp_create (&sin, prog, vers, tv, &sock); if (client == NULL) { return NULL; } tv.tv_sec = 25; clnt_control (client, CLSET_TIMEOUT, (char *)&tv); break; case IPPROTO_TCP: client = clnttcp_create (&sin, prog, vers, &sock, 0, 0); if (client == NULL) { return NULL; } tv.tv_sec = 25; tv.tv_usec = 0; clnt_control (client, CLSET_TIMEOUT, (char *)&tv); break; default: rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; return (NULL); } return client; }