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add PreferredAuthentications

/*	$OpenBSD: match.h,v 1.7 2001/03/10 17:51:04 markus Exp $	*/

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * This file contains various auxiliary functions related to multiple
 * precision integers.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */
#ifndef MATCH_H
#define MATCH_H

/*
 * Returns true if the given string matches the pattern (which may contain ?
 * and * as wildcards), and zero if it does not match.
 */
int     match_pattern(const char *s, const char *pattern);

/*
 * Tries to match the host name (which must be in all lowercase) against the
 * comma-separated sequence of subpatterns (each possibly preceded by ! to
 * indicate negation).  Returns -1 if negation matches, 1 if there is
 * a positive match, 0 if there is no match at all.
 */
int     match_hostname(const char *host, const char *pattern, u_int len);

/*
 * Returns first item from client-list that is also supported by server-list,
 * caller must xfree() returned string.
 */
char	*match_list(const char *client, const char *server, u_int *next);

#endif