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Diffstat (limited to 'sunrpc/clnt_gen.c')
-rw-r--r--sunrpc/clnt_gen.c70
1 files changed, 50 insertions, 20 deletions
diff --git a/sunrpc/clnt_gen.c b/sunrpc/clnt_gen.c
index e54e77828b..d7b949caa6 100644
--- a/sunrpc/clnt_gen.c
+++ b/sunrpc/clnt_gen.c
@@ -6,11 +6,11 @@
  * may copy or modify Sun RPC without charge, but are not authorized
  * to license or distribute it to anyone else except as part of a product or
  * program developed by the user.
- * 
+ *
  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- * 
+ *
  * Sun RPC is provided with no support and without any obligation on the
  * part of Sun Microsystems, Inc. to assist in its use, correction,
  * modification or enhancement.
@@ -18,11 +18,11 @@
  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  * OR ANY PART THEREOF.
- * 
+ *
  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  * or profits or other special, indirect and consequential damages, even if
  * Sun has been advised of the possibility of such damages.
- * 
+ *
  * Sun Microsystems, Inc.
  * 2550 Garcia Avenue
  * Mountain View, California  94043
@@ -33,6 +33,8 @@ static char sccsid[] = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";
 /*
  * Copyright (C) 1987, Sun Microsystems, Inc.
  */
+#include <alloca.h>
+#include <errno.h>
 #include <rpc/rpc.h>
 #include <sys/socket.h>
 #include <sys/errno.h>
@@ -40,7 +42,7 @@ static char sccsid[] = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";
 
 /*
  * Generic client creation: takes (hostname, program-number, protocol) and
- * returns client handle. Default options are set, which the user can 
+ * returns client handle. Default options are set, which the user can
  * change using the rpc equivalent of ioctl()'s.
  */
 CLIENT *
@@ -50,36 +52,64 @@ clnt_create(hostname, prog, vers, proto)
 	unsigned vers;
 	char *proto;
 {
-	struct hostent *h;
-	struct protoent *p;
+	struct hostent hostbuf, *h;
+	size_t hstbuflen;
+	char *hsttmpbuf;
+	struct protoent protobuf, *p;
+	size_t prtbuflen;
+	char *prttmpbuf;
 	struct sockaddr_in sin;
 	int sock;
 	struct timeval tv;
 	CLIENT *client;
+	int herr;
+
+	hstbuflen = 1024;
+	hsttmpbuf = __alloca (hstbuflen);
+	while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
+				  &h, &herr) < 0)
+	  if (herr != NETDB_INTERNAL || errno != ERANGE)
+	    {
+	      rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
+	      return NULL;
+	    }
+	  else
+	    {
+	      /* Enlarge the buffer.  */
+	      hstbuflen *= 2;
+	      hsttmpbuf = __alloca (hstbuflen);
+	    }
 
-	h = gethostbyname(hostname);
-	if (h == NULL) {
-		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
-		return (NULL);
-	}
 	if (h->h_addrtype != AF_INET) {
 		/*
 		 * Only support INET for now
 		 */
 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
-		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT; 
+		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
 		return (NULL);
 	}
 	sin.sin_family = h->h_addrtype;
 	sin.sin_port = 0;
 	bzero(sin.sin_zero, sizeof(sin.sin_zero));
 	bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
-	p = getprotobyname(proto);
-	if (p == NULL) {
-		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
-		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 
-		return (NULL);
-	}
+
+	prtbuflen = 1024;
+	prttmpbuf = __alloca (prtbuflen);
+	while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p)
+	       < 0)
+	  if (errno != ERANGE)
+	    {
+	      rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
+	      rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
+	      return NULL;
+	    }
+	  else
+	    {
+	      /* Enlarge the buffer.  */
+	      prtbuflen *= 2;
+	      prttmpbuf = __alloca (prtbuflen);
+	    }
+
 	sock = RPC_ANYSOCK;
 	switch (p->p_proto) {
 	case IPPROTO_UDP:
@@ -103,7 +133,7 @@ clnt_create(hostname, prog, vers, proto)
 		break;
 	default:
 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
-		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT; 
+		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 		return (NULL);
 	}
 	return (client);