/* 
   Unix SMB/CIFS implementation.

   packet utility functions

   Copyright (C) Andrew Tridgell	2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "dlinklist.h"
#include "nbt_server/nbt_server.h"

/*
  we received a badly formed packet - log it
*/
void nbtd_bad_packet(struct nbt_name_packet *packet, 
		     const char *src_address, const char *reason)
{
	DEBUG(2,("nbtd: bad packet '%s' from %s\n", reason, src_address));
	if (DEBUGLVL(5)) {
		NDR_PRINT_DEBUG(nbt_name_packet, packet);		
	}
}


/*
  see if an incoming packet is a broadcast packet from one of our own
  interfaces
*/
BOOL nbtd_self_packet(struct nbt_name_socket *nbtsock, 
		      struct nbt_name_packet *packet, 
		      const char *src_address, int src_port)
{
	struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private, 
						       struct nbtd_interface);
	struct nbtd_server *nbtsrv = iface->nbtsrv;
	
	/* if its not a broadcast then its not considered a self packet */
	if (!(packet->operation & NBT_FLAG_BROADCAST)) {
		return False;
	}

	/* if its not from the nbt port, then it wasn't a broadcast from us */
	if (src_port != lp_nbt_port()) {
		return False;
	}

	/* this uses the fact that iface->nbtsock is our non-broadcast
	   listen address */
	if (iface->nbtsock == nbtsock &&
	    iface != iface->nbtsrv->bcast_interface) {
		return False;
	}

	/* we have to loop over our interface list, seeing if its from
	   one of our own interfaces */
	for (iface=nbtsrv->interfaces;iface;iface=iface->next) {
		if (strcmp(src_address, iface->ip_address) == 0) {
			return True;
		}
	}

	return False;
}