Merge pull request #1131 from SummerGGift/fix_bug_in_nfs_ipv6

[nfs] : fix bug in nfs when enable ipv6

components/dfs/filesystems/nfs/rpc/clnt_generic.c

-/* @(#)clnt_generic.c	2.2 88/08/01 4.0 RPCSRC */
+/* @(#)clnt_generic.c   2.2 88/08/01 4.0 RPCSRC */
 /*
  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  * unrestricted use provided that this legend is included on all tape
@@ -41,49 +41,47 @@ static char sccsid[] = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";
  * returns client handle. Default options are set, which the user can
  * change using the rpc equivalent of ioctl()'s.
  */
-CLIENT *clnt_create (const char *hostname, const unsigned long prog,
-				 const unsigned long vers, const char *proto)
+CLIENT *clnt_create(const char *hostname, const unsigned long prog,
+                    const unsigned long vers, const char *proto)
 {
-	int sock;
-	struct hostent *h;
-	struct sockaddr_in sin;
-	struct timeval tv;
-	CLIENT *client;
+    int sock;
+    struct sockaddr_in server;
+    struct addrinfo hint, *res = NULL;
+    struct timeval tv;
+    CLIENT *client;
+    int ret;
 
-	h = (struct hostent *)gethostbyname(hostname);
-	if (h == NULL) {
-		rt_kprintf("unknown host\n");
-		return (NULL);
-	}
-	if (h->h_addrtype != AF_INET) {
-		rt_kprintf("unknow inet\n");
-		return (NULL);
-	}
-	memset((char*)&sin,0,sizeof(sin));
-	sin.sin_family = h->h_addrtype;
-	sin.sin_port = 0;
-	memmove((char *) &sin.sin_addr, h->h_addr, h->h_length);
+    memset(&hint, 0, sizeof(hint));
+    ret = getaddrinfo(hostname, NULL, &hint, &res);
+    if (ret != 0)
+    {
+        rt_kprintf("getaddrinfo err: %d '%s'\n", ret, hostname);
+        return NULL;
+    }
 
-	sock = -1;
-	if (strcmp(proto, "udp") == 0)
-	{
-		tv.tv_sec = 5;
-		tv.tv_usec = 0;
-		client = clntudp_create(&sin, prog, vers, tv, &sock);
-		if (client == NULL) return NULL;
-		tv.tv_sec = 1;
-		clnt_control(client, CLSET_TIMEOUT, (char*)&tv);
-	}
-	else
-	{
-		rt_kprintf("unknow protocol\n");
-		return NULL;
-	}
+    memcpy(&server, res->ai_addr, sizeof(struct sockaddr_in));
+    freeaddrinfo(res);
 
-	return (client);
+    sock = -1;
+    if (strcmp(proto, "udp") == 0)
+    {
+        tv.tv_sec = 5;
+        tv.tv_usec = 0;
+        client = clntudp_create(&server, prog, vers, tv, &sock);
+        if (client == NULL) return NULL;
+        tv.tv_sec = 1;
+        clnt_control(client, CLSET_TIMEOUT, (char *)&tv);
+    }
+    else
+    {
+        rt_kprintf("unknow protocol\n");
+        return NULL;
+    }
+
+    return (client);
 }
 
 void clnt_perror(CLIENT *rpch, const char *s)
 {
-	rt_kprintf("rpc client error:%s\n", s);
+    rt_kprintf("rpc client error:%s\n", s);
 }