new file mode 100644
--- /dev/null
+++ b/packages/net/snmp/lib/current/src/callback.c
@@ -0,0 +1,187 @@
+//==========================================================================
+//
+//      ./lib/current/src/callback.c
+//
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//####UCDSNMPCOPYRIGHTBEGIN####
+//
+// -------------------------------------------
+//
+// Portions of this software may have been derived from the UCD-SNMP
+// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of
+// California at Davis, which was originally based on the Carnegie Mellon
+// University SNMP implementation.  Portions of this software are therefore
+// covered by the appropriate copyright disclaimers included herein.
+//
+// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"
+// -------------------------------------------
+//
+//####UCDSNMPCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    hmt
+// Contributors: hmt
+// Date:         2000-05-30
+// Purpose:      Port of UCD-SNMP distribution to eCos.
+// Description:  
+//              
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+/********************************************************************
+       Copyright 1989, 1991, 1992 by Carnegie Mellon University
+
+			  Derivative Work -
+Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
+
+			 All Rights Reserved
+
+Permission to use, copy, modify and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appears in all copies and
+that both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of CMU and The Regents of
+the University of California not be used in advertising or publicity
+pertaining to distribution of the software without specific written
+permission.
+
+CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
+WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR
+THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
+INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*********************************************************************/
+/* callback.c: A generic callback mechanism */
+
+#include <config.h>
+#include <sys/types.h>
+#include <stdio.h>
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#else
+#include <strings.h>
+#endif
+
+#if HAVE_DMALLOC_H
+#include <dmalloc.h>
+#endif
+
+#include "tools.h"
+#include "callback.h"
+#include "asn1.h"
+#include "snmp_api.h"
+#include "snmp_debug.h"
+
+static struct snmp_gen_callback *thecallbacks[MAX_CALLBACK_IDS][MAX_CALLBACK_SUBIDS];
+
+/* the chicken. or the egg.  You pick. */
+void
+init_callbacks(void) {
+  /* probably not needed? Should be full of 0's anyway? */
+  /* (poses a problem if you put init_callbacks() inside of
+     init_snmp() and then want the app to register a callback before
+     init_snmp() is called in the first place.  -- Wes */
+  /* memset(thecallbacks, 0, sizeof(thecallbacks)); */
+}
+
+int
+snmp_register_callback(int major, int minor, SNMPCallback *new_callback,
+                       void *arg) {
+
+  struct snmp_gen_callback *scp;
+  
+  if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
+    return SNMPERR_GENERR;
+  }
+  
+  if (thecallbacks[major][minor] != NULL) {
+    /* get to the end of the list */
+    for(scp = thecallbacks[major][minor]; scp->next != NULL; scp = scp->next);
+
+    /* mallocate a new entry */
+    scp->next = SNMP_MALLOC_STRUCT(snmp_gen_callback);
+    scp = scp->next;
+  } else {
+    /* mallocate a new entry */
+    scp = SNMP_MALLOC_STRUCT(snmp_gen_callback);
+
+    /* make the new node the head */
+    thecallbacks[major][minor] = scp;
+  }
+
+  if (scp == NULL)
+    return SNMPERR_GENERR;
+
+  scp->sc_client_arg = arg;
+  scp->sc_callback = new_callback;
+
+  DEBUGMSGTL(("callback","registered callback for maj=%d min=%d\n",
+              major, minor));
+
+  return SNMPERR_SUCCESS;
+}
+
+int
+snmp_call_callbacks(int major, int minor, void *caller_arg) {
+  struct snmp_gen_callback *scp;
+
+  if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
+    return SNMPERR_GENERR;
+  }
+
+  DEBUGMSGTL(("callback","START calling callbacks for maj=%d min=%d\n",
+              major, minor));
+
+  /* for each registered callback of type major and minor */
+  for(scp = thecallbacks[major][minor]; scp != NULL; scp = scp->next) {
+
+    DEBUGMSGTL(("callback","calling a callback for maj=%d min=%d\n",
+                major, minor));
+
+    /* call them */
+    (*(scp->sc_callback))(major, minor, caller_arg, scp->sc_client_arg);
+  }
+  
+  DEBUGMSGTL(("callback","END calling callbacks for maj=%d min=%d\n",
+              major, minor));
+
+  return SNMPERR_SUCCESS;
+}