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 1.3 1995/10/22 14:51:12 phk 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 #include <string.h> 44 45 /* 46 * Generic client creation: takes (hostname, program-number, protocol) and 47 * returns client handle. Default options are set, which the user can 48 * change using the rpc equivalent of ioctl()'s. 49 */ 50 CLIENT * 51 clnt_create(hostname, prog, vers, proto) 52 char *hostname; 53 u_long prog; 54 u_long vers; 55 char *proto; 56 { 57 struct hostent *h; 58 struct protoent *p; 59 struct sockaddr_in sin; 60 int sock; 61 struct timeval tv; 62 CLIENT *client; 63 64 h = gethostbyname(hostname); 65 if (h == NULL) { 66 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 67 return (NULL); 68 } 69 if (h->h_addrtype != AF_INET) { 70 /* 71 * Only support INET for now 72 */ 73 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 74 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT; 75 return (NULL); 76 } 77 memset(&sin, 0, sizeof(sin)); 78 sin.sin_len = sizeof(struct sockaddr_in); 79 sin.sin_family = h->h_addrtype; 80 sin.sin_port = 0; 81 bzero(sin.sin_zero, sizeof(sin.sin_zero)); 82 bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length); 83 p = getprotobyname(proto); 84 if (p == NULL) { 85 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 86 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 87 return (NULL); 88 } 89 sock = RPC_ANYSOCK; 90 switch (p->p_proto) { 91 case IPPROTO_UDP: 92 tv.tv_sec = 5; 93 tv.tv_usec = 0; 94 client = clntudp_create(&sin, prog, vers, tv, &sock); 95 if (client == NULL) { 96 return (NULL); 97 } 98 tv.tv_sec = 25; 99 clnt_control(client, CLSET_TIMEOUT, &tv); 100 break; 101 case IPPROTO_TCP: 102 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0); 103 if (client == NULL) { 104 return (NULL); 105 } 106 tv.tv_sec = 25; 107 tv.tv_usec = 0; 108 clnt_control(client, CLSET_TIMEOUT, &tv); 109 break; 110 default: 111 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 112 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 113 return (NULL); 114 } 115 return (client); 116 } 117