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/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2009, Jan Vidar Krey
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
/*
* This file is used for fiddling with IP-addresses,
* primarily used for IP-banning in uhub.
*/
#ifndef HAVE_UHUB_IPCALC_H
#define HAVE_UHUB_IPCALC_H
struct ip_addr_encap {
int af;
union {
struct in_addr in;
struct in6_addr in6;
} internal_ip_data;
};
struct ip_range
{
struct ip_addr_encap lo;
struct ip_addr_encap hi;
};
extern int ip_convert_to_binary(const char* text_addr, struct ip_addr_encap* raw);
extern const char* ip_convert_to_string(struct ip_addr_encap* raw);
/**
* Convert a string on the form:
* ip-ip or ip/mask to an iprange.
*
* Note: both IPv4 and IPv6 addresses are valid, but if a range is given
* both addresses must be of the same address family.
*
* Valid examples of address
* IPv4:
* 192.168.2.1
* 192.168.0.0/16
* 192.168.0.0-192.168.255.255
*
* IPv6:
* 2001:4860:A005::68
* 2001:4860:A005::0/80
* 2001:4860:A005::0-2001:4860:A005:ffff:ffff:ffff:ffff:ffff
*
* @return 0 if invalid, 1 if OK
*/
extern int ip_convert_address_to_range(const char* address, struct ip_range* range);
/**
* @return 1 if addr is inside range, 0 otherwise
*/
extern int ip_in_range(struct ip_addr_encap* addr, struct ip_range* range);
/**
* @return 1 if address is a valid IPv4 address in text notation
* 0 if invalid
*/
extern int ip_is_valid_ipv4(const char* address);
/**
* @return 1 if address is a valid IPv6 address in text notation
* 0 if invalid
*/
extern int ip_is_valid_ipv6(const char* address);
/**
* This function converts an IP address in text_address to a binary
* struct sockaddr.
* This will auto-detect if the IP-address is IPv6 (and that is supported),
* or if IPv4 should be used.
* NOTE: Use sockaddr_storage to allocate enough memory for IPv6.
*
* @param text_addr is an ipaddress either ipv6 or ipv4.
* Special magic addresses called "any" and "loopback" exist,
* and will work accross IPv6/IPv4.
* @param port Fill the struct sockaddr* with the given port, can safely be ignored.
*/
extern int ip_convert_address(const char* text_address, int port, struct sockaddr* addr, socklen_t* addr_len);
extern int ip_mask_create_left(int af, int bits, struct ip_addr_encap* result);
extern int ip_mask_create_right(int af, int bits, struct ip_addr_encap* result);
extern void ip_mask_apply_AND(struct ip_addr_encap* address, struct ip_addr_encap* mask, struct ip_addr_encap* result);
extern void ip_mask_apply_OR(struct ip_addr_encap* address, struct ip_addr_encap* mask, struct ip_addr_encap* result);
/**
* @return <0 if a is less than b
* @return >0 if a is greater than b
* @return 0 if they are equal
*/
extern int ip_compare(struct ip_addr_encap* a, struct ip_addr_encap* b);
#endif /* HAVE_UHUB_IPCALC_H */
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