-Retry get channel authentication capabilities command without the IPMI 2.0 bit

if the first one receives '0xCC'.  The x336 BMC, for one, checks the values 
 of the 'reserved' bits instead of ignoring them.


git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2188 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/ipmi.pm

@@ -4259,6 +4259,34 @@ sub getchanauthcap {
 	}
 
 	$code = $response[20];
+    if ($code == 0xcc) {
+        #Despite the fact that the IPMI 1.5 spec declared the high bits to be
+        #reserved, some 1.5 BMCs checked the value anyway (erroneously)
+        #This retries with the IPMI 2.0 bit cleared
+    	@data = ($rqsa,$seqlun,0x38,0x0e,0x04);
+    	@rn = ($rssa,$netfun);
+    	$length = (scalar @data)+4;
+    	
+    	@msg = (
+    		@rmcp,
+    		$auth,
+    		@seqnum,
+    		@session_id,
+    		$length,
+    		$rssa,
+    		$netfun,
+    		dochksum(\@rn),
+    		@data,
+    		dochksum(\@data)
+    	);
+
+    	($error,@response) = domsg($sock,\@msg,$timeout,0);
+    
+    	if($error) {
+    		return($error);
+    	}
+    	$code = $response[20];
+    }
 	if($code != 0x00) {
 		$error = $codes{$code};
 		if(!$error) {