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