156 lines
4.2 KiB
C
156 lines
4.2 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* Copyright (C) 1987, Sun Microsystems, Inc.
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*/
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#include <alloca.h>
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#include <errno.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <netdb.h>
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/*
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* Generic client creation: takes (hostname, program-number, protocol) and
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* returns client handle. Default options are set, which the user can
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* change using the rpc equivalent of ioctl()'s.
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*/
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CLIENT *
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clnt_create (const char *hostname, u_long prog, u_long vers,
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const char *proto)
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{
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struct hostent hostbuf, *h;
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size_t hstbuflen;
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char *hsttmpbuf;
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struct protoent protobuf, *p;
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size_t prtbuflen;
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char *prttmpbuf;
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struct sockaddr_in sin;
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struct sockaddr_un sun;
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int sock;
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struct timeval tv;
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CLIENT *client;
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int herr;
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if (strcmp (proto, "unix") == 0)
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{
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__bzero ((char *)&sun, sizeof (sun));
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sun.sun_family = AF_UNIX;
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strcpy (sun.sun_path, hostname);
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sock = RPC_ANYSOCK;
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client = clntunix_create (&sun, prog, vers, &sock, 0, 0);
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if (client == NULL)
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return NULL;
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tv.tv_sec = 25;
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tv.tv_usec = 0;
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clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
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return client;
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}
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hstbuflen = 1024;
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hsttmpbuf = __alloca (hstbuflen);
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while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
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&h, &herr) < 0)
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if (herr != NETDB_INTERNAL || errno != ERANGE)
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{
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rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
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return NULL;
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}
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else
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{
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/* Enlarge the buffer. */
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hstbuflen *= 2;
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hsttmpbuf = __alloca (hstbuflen);
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}
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if (h->h_addrtype != AF_INET)
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{
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/*
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* Only support INET for now
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*/
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
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return NULL;
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}
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sin.sin_family = h->h_addrtype;
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sin.sin_port = 0;
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__bzero (sin.sin_zero, sizeof (sin.sin_zero));
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bcopy (h->h_addr, (char *) &sin.sin_addr, h->h_length);
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prtbuflen = 1024;
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prttmpbuf = __alloca (prtbuflen);
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while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p)
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< 0)
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if (errno != ERANGE)
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{
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rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
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rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
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return NULL;
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}
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else
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{
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/* Enlarge the buffer. */
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prtbuflen *= 2;
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prttmpbuf = __alloca (prtbuflen);
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}
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sock = RPC_ANYSOCK;
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switch (p->p_proto)
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{
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case IPPROTO_UDP:
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tv.tv_sec = 5;
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tv.tv_usec = 0;
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client = clntudp_create (&sin, prog, vers, tv, &sock);
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if (client == NULL)
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{
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return NULL;
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}
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tv.tv_sec = 25;
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clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
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break;
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case IPPROTO_TCP:
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client = clnttcp_create (&sin, prog, vers, &sock, 0, 0);
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if (client == NULL)
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{
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return NULL;
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}
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tv.tv_sec = 25;
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tv.tv_usec = 0;
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clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
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break;
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default:
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
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return (NULL);
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}
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return client;
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}
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