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addr_and_mask.h

/* addr_and_mask.h
 * Declarations of routines to fetch IPv4 and IPv6 addresses from a tvbuff
 * and then mask out bits other than those covered by a prefix length
 *
 * $Id: addr_and_mask.h 18197 2006-05-21 05:12:17Z sahlberg $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef __ADDR_AND_MASK_H__
#define __ADDR_AND_MASK_H__

/*
 * These routines return PREFIX_LEN_OK on success, PREFIX_LEN_TOO_LONG if
 * the prefix length is too long, and PREFIX_LEN_ZERO if the prefix length
 * is 0.
 */

#define PREFIX_LEN_OK         0
#define PREFIX_LEN_TOO_LONG   1
#define PREFIX_LEN_ZERO       2

extern int ipv4_addr_and_mask(tvbuff_t *tvb, int offset, guint8 *addr,
    guint32 prefix_len);

extern int ipv6_addr_and_mask(tvbuff_t *tvb, int offset,
    struct e_in6_addr *addr, guint32 prefix_len);

#endif /* __ADDR_AND_MASK_H__  */

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