115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2014, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* This file is used for fiddling with IP-addresses,
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* primarily used for IP-banning in uhub.
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*/
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#ifndef HAVE_UHUB_IPCALC_H
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#define HAVE_UHUB_IPCALC_H
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struct ip_addr_encap {
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int af;
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union {
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struct in_addr in;
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struct in6_addr in6;
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} internal_ip_data;
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};
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struct ip_range
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{
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struct ip_addr_encap lo;
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struct ip_addr_encap hi;
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};
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extern int ip_convert_to_binary(const char* text_addr, struct ip_addr_encap* raw);
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extern const char* ip_convert_to_string(struct ip_addr_encap* raw);
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/**
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* Convert a string on the form:
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* ip-ip or ip/mask to an iprange.
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*
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* Note: both IPv4 and IPv6 addresses are valid, but if a range is given
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* both addresses must be of the same address family.
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*
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* Valid examples of address
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* IPv4:
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* 192.168.2.1
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* 192.168.0.0/16
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* 192.168.0.0-192.168.255.255
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*
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* IPv6:
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* 2001:4860:A005::68
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* 2001:4860:A005::0/80
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* 2001:4860:A005::0-2001:4860:A005:ffff:ffff:ffff:ffff:ffff
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*
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* @return 0 if invalid, 1 if OK
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*/
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extern int ip_convert_address_to_range(const char* address, struct ip_range* range);
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/**
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* @return 1 if addr is inside range, 0 otherwise
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*/
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extern int ip_in_range(struct ip_addr_encap* addr, struct ip_range* range);
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/**
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* @return 1 if address is a valid IPv4 address in text notation
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* 0 if invalid
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*/
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extern int ip_is_valid_ipv4(const char* address);
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/**
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* @return 1 if address is a valid IPv6 address in text notation
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* 0 if invalid
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*/
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extern int ip_is_valid_ipv6(const char* address);
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/**
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* This function converts an IP address in text_address to a binary
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* struct sockaddr.
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* This will auto-detect if the IP-address is IPv6 (and that is supported),
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* or if IPv4 should be used.
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* NOTE: Use sockaddr_storage to allocate enough memory for IPv6.
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*
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* @param text_addr is an ipaddress either ipv6 or ipv4.
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* Special magic addresses called "any" and "loopback" exist,
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* and will work across IPv6/IPv4.
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* @param port Fill the struct sockaddr* with the given port, can safely be ignored.
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*/
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extern int ip_convert_address(const char* text_address, int port, struct sockaddr* addr, socklen_t* addr_len);
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extern int ip_mask_create_left(int af, int bits, struct ip_addr_encap* result);
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extern int ip_mask_create_right(int af, int bits, struct ip_addr_encap* result);
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extern void ip_mask_apply_AND(struct ip_addr_encap* address, struct ip_addr_encap* mask, struct ip_addr_encap* result);
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extern void ip_mask_apply_OR(struct ip_addr_encap* address, struct ip_addr_encap* mask, struct ip_addr_encap* result);
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/**
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* @return <0 if a is less than b
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* @return >0 if a is greater than b
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* @return 0 if they are equal
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*/
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extern int ip_compare(struct ip_addr_encap* a, struct ip_addr_encap* b);
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#endif /* HAVE_UHUB_IPCALC_H */
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