lib/libc/rpc/clnt_generic.c

   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  * @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI
  30  * @(#)clnt_generic.c   2.2 88/08/01 4.0 RPCSRC
  31  * $FreeBSD: src/lib/libc/rpc/clnt_generic.c,v 1.9.2.1 2001/03/05 10:48:28 obrien Exp $
  32  * $DragonFly: src/lib/libc/rpc/clnt_generic.c,v 1.4 2005/01/31 22:29:38 dillon Exp $
  33  */
  34
  35 /*
  36  * Copyright (C) 1987, Sun Microsystems, Inc.
  37  */
  38 #include <rpc/rpc.h>
  39 #include <sys/socket.h>
  40 #include <errno.h>
  41 #include <netdb.h>
  42 #include <string.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(const char *hostname, u_long prog, u_long vers, const char *proto)
  51 {
  52         struct hostent *h;
  53         struct protoent *p;
  54         struct sockaddr_in sin;
  55         struct sockaddr_un sun;
  56         int sock;
  57         static struct timeval tv;
  58         CLIENT *client;
  59
  60         if (!strcmp(proto, "unix")) {
  61                 bzero((char *)&sun, sizeof(sun));
  62                 sun.sun_family = AF_UNIX;
  63                 strcpy(sun.sun_path, hostname);
  64                 sun.sun_len = sizeof(sun.sun_len) + sizeof(sun.sun_family) +
  65                                 strlen(sun.sun_path) + 1;
  66                 sock = RPC_ANYSOCK;
  67                 client = clntunix_create(&sun, prog, vers, &sock, 0, 0);
  68                 if (client == NULL)
  69                         return(NULL);
  70                 tv.tv_sec = 25;
  71                 tv.tv_usec = 0;
  72                 clnt_control(client, CLSET_TIMEOUT, &tv);
  73                 return(client);
  74         }
  75
  76         h = gethostbyname(hostname);
  77         if (h == NULL) {
  78                 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
  79                 return (NULL);
  80         }
  81         if (h->h_addrtype != AF_INET) {
  82                 /*
  83                  * Only support INET for now
  84                  */
  85                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
  86                 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
  87                 return (NULL);
  88         }
  89         memset(&sin, 0, sizeof(sin));
  90         sin.sin_len = sizeof(struct sockaddr_in);
  91         sin.sin_family = h->h_addrtype;
  92         sin.sin_port = 0;
  93         memcpy((char*)&sin.sin_addr, h->h_addr, h->h_length);
  94         p = getprotobyname(proto);
  95         if (p == NULL) {
  96                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
  97                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
  98                 return (NULL);
  99         }
 100         sock = RPC_ANYSOCK;
 101         switch (p->p_proto) {
 102         case IPPROTO_UDP:
 103                 tv.tv_sec = 5;
 104                 tv.tv_usec = 0;
 105                 client = clntudp_create(&sin, prog, vers, tv, &sock);
 106                 if (client == NULL) {
 107                         return (NULL);
 108                 }
 109 #if 0   /* XXX do we need this? */
 110                 tv.tv_sec = 25;
 111                 tv.tv_usec = 0;
 112                 clnt_control(client, CLSET_TIMEOUT, &tv);
 113 #endif
 114                 break;
 115         case IPPROTO_TCP:
 116                 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
 117                 if (client == NULL) {
 118                         return (NULL);
 119                 }
 120 #if 0   /* XXX do we need this? */
 121                 tv.tv_sec = 25;
 122                 tv.tv_usec = 0;
 123                 clnt_control(client, CLSET_TIMEOUT, &tv);
 124 #endif
 125                 break;
 126         default:
 127                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 128                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 129                 return (NULL);
 130         }
 131         return (client);
 132 }