--- bsdSockResource.c_orig	Mon Jul 15 13:06:01 2002
+++ bsdSockResource.c	Mon Jul 15 13:07:10 2002
@@ -39,6 +39,8 @@
 #include "bsdSocketResource.h"
 #include "epicsAssert.h"
 
+#define MAX_HOSTNAME_LENGTH 64
+
 /*
  * NOOP
  */
@@ -77,13 +79,25 @@
 		pBuf[bufSize-1] = '\0';
 	}
 	else {
-		ent = gethostbyaddr((char *) &paddr->sin_addr, 
-				sizeof(paddr->sin_addr), AF_INET);
-		if(ent){
-			pString = ent->h_name;
-		}
-		else{
-			pString = inet_ntoa (paddr->sin_addr);
+		static char lastHost[MAX_HOSTNAME_LENGTH+1];
+		static struct sockaddr_in lastAddr;
+		
+		/* There should be a mutex lock here... */
+		
+		if (memcmp(&paddr->sin_addr, &lastAddr.sin_addr, sizeof(paddr->sin_addr)) == 0) {
+			pString = lastHost;
+		} else {
+			ent = gethostbyaddr((char *) &paddr->sin_addr, 
+					sizeof(paddr->sin_addr), AF_INET);
+			if(ent){
+				pString = ent->h_name;
+			}
+			else{
+				pString = inet_ntoa (paddr->sin_addr);
+			}
+			strncpy(lastHost, pString, MAX_HOSTNAME_LENGTH);
+			lastHost[MAX_HOSTNAME_LENGTH] = '\0';
+			lastAddr.sin_addr = paddr->sin_addr;
 		}
 
 		/*
@@ -96,6 +110,8 @@
 		else {
 			sprintf (pBuf, "%.*s", (int) (bufSize-1), pString);
 		}
+
+		/* There should be a mutex unlock here... */
 	}
 }