sunrpc/clnt_gen.c

   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 }