1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 /*static char *sccsid = "from: @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";*/ 32 /*static char *sccsid = "from: @(#)clnt_generic.c 2.2 88/08/01 4.0 RPCSRC";*/ 33 static char *rcsid = "$Id: clnt_generic.c,v 1.1 1994/08/07 18:35:43 wollman Exp $"; 34 #endif 35 36 /* 37 * Copyright (C) 1987, Sun Microsystems, Inc. 38 */ 39 #include <rpc/rpc.h> 40 #include <sys/socket.h> 41 #include <sys/errno.h> 42 #include <netdb.h> 43 44 /* 45 * Generic client creation: takes (hostname, program-number, protocol) and 46 * returns client handle. Default options are set, which the user can 47 * change using the rpc equivalent of ioctl()'s. 48 */ 49 CLIENT * 50 clnt_create(hostname, prog, vers, proto) 51 char *hostname; 52 u_long prog; 53 u_long vers; 54 char *proto; 55 { 56 struct hostent *h; 57 struct protoent *p; 58 struct sockaddr_in sin; 59 int sock; 60 struct timeval tv; 61 CLIENT *client; 62 63 h = gethostbyname(hostname); 64 if (h == NULL) { 65 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 66 return (NULL); 67 } 68 if (h->h_addrtype != AF_INET) { 69 /* 70 * Only support INET for now 71 */ 72 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 73 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT; 74 return (NULL); 75 } 76 sin.sin_family = h->h_addrtype; 77 sin.sin_port = 0; 78 bzero(sin.sin_zero, sizeof(sin.sin_zero)); 79 bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length); 80 p = getprotobyname(proto); 81 if (p == NULL) { 82 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 83 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 84 return (NULL); 85 } 86 sock = RPC_ANYSOCK; 87 switch (p->p_proto) { 88 case IPPROTO_UDP: 89 tv.tv_sec = 5; 90 tv.tv_usec = 0; 91 client = clntudp_create(&sin, prog, vers, tv, &sock); 92 if (client == NULL) { 93 return (NULL); 94 } 95 tv.tv_sec = 25; 96 clnt_control(client, CLSET_TIMEOUT, &tv); 97 break; 98 case IPPROTO_TCP: 99 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0); 100 if (client == NULL) { 101 return (NULL); 102 } 103 tv.tv_sec = 25; 104 tv.tv_usec = 0; 105 clnt_control(client, CLSET_TIMEOUT, &tv); 106 break; 107 default: 108 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 109 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 110 return (NULL); 111 } 112 return (client); 113 } 114