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/*
 * 
 * readconf.h
 * 
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * 
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * 
 * Created: Sat Apr 22 00:25:29 1995 ylo
 * 
 * Functions for reading the configuration file.
 * 
 */

/* RCSID("$Id: readconf.h,v 1.11 1999/11/24 00:26:02 deraadt Exp $"); */

#ifndef READCONF_H
#define READCONF_H

/* Data structure for representing a forwarding request. */

typedef struct {
	int     port;		/* Port to forward. */
	char   *host;		/* Host to connect. */
	int     host_port;	/* Port to connect on host. */
}       Forward;
/* Data structure for representing option data. */

typedef struct {
	int     forward_agent;	/* Forward authentication agent. */
	int     forward_x11;	/* Forward X11 display. */
	int     gateway_ports;	/* Allow remote connects to forwarded ports. */
	int     use_privileged_port;	/* Don't use privileged port if false. */
	int     rhosts_authentication;	/* Try rhosts authentication. */
	int     rhosts_rsa_authentication;	/* Try rhosts with RSA
						 * authentication. */
	int     rsa_authentication;	/* Try RSA authentication. */
	int     skey_authentication;	/* Try S/Key or TIS authentication. */
#ifdef KRB4
	int     kerberos_authentication;	/* Try Kerberos
						 * authentication. */
#endif
#ifdef AFS
	int     kerberos_tgt_passing;	/* Try Kerberos tgt passing. */
	int     afs_token_passing;	/* Try AFS token passing. */
#endif
	int     password_authentication;	/* Try password
						 * authentication. */
	int     fallback_to_rsh;/* Use rsh if cannot connect with ssh. */
	int     use_rsh;	/* Always use rsh (don\'t try ssh). */
	int     batch_mode;	/* Batch mode: do not ask for passwords. */
	int     check_host_ip;	/* Also keep track of keys for IP address */
	int     strict_host_key_checking;	/* Strict host key checking. */
	int     compression;	/* Compress packets in both directions. */
	int     compression_level;	/* Compression level 1 (fast) to 9
					 * (best). */
	int     keepalives;	/* Set SO_KEEPALIVE. */
	LogLevel log_level;	/* Level for logging. */

	int     port;		/* Port to connect. */
	int     connection_attempts;	/* Max attempts (seconds) before
					 * giving up */
	int     number_of_password_prompts;	/* Max number of password
						 * prompts. */
	int     cipher;		/* Cipher to use. */
	char   *hostname;	/* Real host to connect. */
	char   *proxy_command;	/* Proxy command for connecting the host. */
	char   *user;		/* User to log in as. */
	int     escape_char;	/* Escape character; -2 = none */

	char   *system_hostfile;/* Path for /etc/ssh_known_hosts. */
	char   *user_hostfile;	/* Path for $HOME/.ssh/known_hosts. */

	int     num_identity_files;	/* Number of files for RSA identities. */
	char   *identity_files[SSH_MAX_IDENTITY_FILES];

	/* Local TCP/IP forward requests. */
	int     num_local_forwards;
	Forward local_forwards[SSH_MAX_FORWARDS_PER_DIRECTION];

	/* Remote TCP/IP forward requests. */
	int     num_remote_forwards;
	Forward remote_forwards[SSH_MAX_FORWARDS_PER_DIRECTION];
}       Options;


/* Initializes options to special values that indicate that they have not
   yet been set.  Read_config_file will only set options with this value.
   Options are processed in the following order: command line, user config
   file, system config file.  Last, fill_default_options is called. */
void    initialize_options(Options * options);

/* Called after processing other sources of option data, this fills those
   options for which no value has been specified with their default values. */
void    fill_default_options(Options * options);

/* Processes a single option line as used in the configuration files.
   This only sets those values that have not already been set.
   Returns 0 for legal options */
int 
process_config_line(Options * options, const char *host,
    char *line, const char *filename, int linenum,
    int *activep);

/* Reads the config file and modifies the options accordingly.  Options should
   already be initialized before this call.  This never returns if there
   is an error.  If the file does not exist, this returns immediately. */
void 
read_config_file(const char *filename, const char *host,
    Options * options);

/* Adds a local TCP/IP port forward to options.  Never returns if there
   is an error. */
void 
add_local_forward(Options * options, int port, const char *host,
    int host_port);

/* Adds a remote TCP/IP port forward to options.  Never returns if there
   is an error. */
void 
add_remote_forward(Options * options, int port, const char *host,
    int host_port);


#endif				/* READCONF_H */