/* Declarations for host.c
   Copyright (C) 1995, 1996, 1997, 2001 Free Software Foundation, Inc.

This file is part of GNU Wget.

GNU Wget 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.

GNU Wget 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 Wget; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef HOST_H
#define HOST_H

#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>

#undef INET6

struct url;
struct address_list;

/* wget_sockaddr is used instead of sockaddr where an IPV6 address
   must fit.  */

typedef union {
	struct sockaddr     sa;   /* Generic but too small */
	struct sockaddr_in  sin;  /* IPv4 socket address */
#ifdef INET6
	struct sockaddr_in6 sin6; /* IPv6 socket address */
#endif
} wget_sockaddr;

typedef struct {
  unsigned char bytes[4];
} ip4_address;

/* If compiled with IPv6 support, we internally represent all IP
   addresses as IPv6 addresses.  IPv4 addresses are dynamically mapped
   to IPv6, i.e. stored in the format ::ffff:<Ipv4>.  */

#ifdef INET6
# define MAX_IP_ADDRESS_SIZE 16
#else
# define MAX_IP_ADDRESS_SIZE 4
#endif

typedef struct {
  unsigned char bytes[MAX_IP_ADDRESS_SIZE];
} ip_address;

/* Function declarations */
struct address_list *lookup_host PARAMS ((const char *, int));
char *herrmsg PARAMS ((int));

void address_list_get_bounds PARAMS ((struct address_list *, int *, int *));
void address_list_copy_one PARAMS ((struct address_list *, int,
				    ip_address *));
int address_list_match_all PARAMS ((struct address_list *,
				    struct address_list *));
void address_list_set_faulty PARAMS ((struct address_list *, int));
void address_list_release PARAMS ((struct address_list *));

char *pretty_print_address PARAMS ((ip_address *));

int accept_domain PARAMS ((struct url *));
int sufmatch PARAMS ((const char **, const char *));

void host_cleanup PARAMS ((void));

void wget_sockaddr_set_address PARAMS((wget_sockaddr *, int, 
				       unsigned short, ip_address *));
void wget_sockaddr_set_port PARAMS((wget_sockaddr *, unsigned short));
void *wget_sockaddr_get_addr PARAMS((wget_sockaddr *));
unsigned short wget_sockaddr_get_port PARAMS((const wget_sockaddr *));
int sockaddr_len PARAMS(());
void map_ipv4_to_ip PARAMS((ip4_address *, ip_address *));
int  map_ip_to_ipv4 PARAMS((ip_address *, ip4_address *));
 
extern	int	ip_default_family;	/* defined in host.c */


#endif /* HOST_H */