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https://github.com/oxen-io/lokinet.git
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154 lines
3.4 KiB
C++
154 lines
3.4 KiB
C++
#ifndef LLARP_NET_HPP
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#define LLARP_NET_HPP
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#include <net/address_info.hpp>
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#include <net/net_int.hpp>
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#include <net/net.h>
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#include <util/logger.hpp>
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#include <util/mem.hpp>
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#include <util/string_view.hpp>
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#include <functional>
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#include <stdlib.h> // for itoa
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#include <vector>
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// for addrinfo
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#ifndef _WIN32
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#else
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <wspiapi.h>
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#define inet_aton(x, y) inet_pton(AF_INET, x, y)
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#endif
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bool
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operator==(const sockaddr& a, const sockaddr& b);
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bool
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operator==(const sockaddr_in& a, const sockaddr_in& b);
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bool
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operator==(const sockaddr_in6& a, const sockaddr_in6& b);
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bool
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operator<(const sockaddr_in6& a, const sockaddr_in6& b);
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bool
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operator<(const in6_addr& a, const in6_addr& b);
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bool
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operator==(const in6_addr& a, const in6_addr& b);
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struct privatesInUse
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{
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// true if used by real NICs on start
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// false if not used, and means we could potentially use it if needed
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bool ten; // 16m ips
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bool oneSeven; // 1m ips
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bool oneNine; // 65k ips
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};
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struct privatesInUse
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llarp_getPrivateIfs();
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namespace llarp
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{
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struct IPRange
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{
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huint32_t addr;
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huint32_t netmask_bits;
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/// return true if ip is contained in this ip range
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bool
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Contains(const huint32_t& ip) const
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{
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return (addr & netmask_bits) == (ip & netmask_bits);
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}
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friend std::ostream&
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operator<<(std::ostream& out, const IPRange& a)
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{
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return out << a.addr << "/" << a.netmask_bits;
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}
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};
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/// get a netmask with the higest numset bits set
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constexpr uint32_t
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__netmask_ipv4_bits(uint32_t numset)
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{
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return (32 - numset) ? (1 << numset) | __netmask_ipv4_bits(numset + 1) : 0;
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}
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/// get an ipv4 netmask given some /N range
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constexpr huint32_t
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netmask_ipv4_bits(uint32_t num)
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{
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return huint32_t{__netmask_ipv4_bits(32 - num)};
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}
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constexpr huint32_t
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ipaddr_ipv4_bits(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
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{
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#if __BYTE_ORDER == __ORDER_BIG_ENDIAN__
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return huint32_t{(a) | (b << 8) | (c << 16) | (d << 24)};
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#else
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return huint32_t{(d) | (c << 8) | (b << 16) | (a << 24)};
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#endif
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}
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constexpr IPRange
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iprange_ipv4(byte_t a, byte_t b, byte_t c, byte_t d, byte_t mask)
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{
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return IPRange{ipaddr_ipv4_bits(a, b, c, d), netmask_ipv4_bits(mask)};
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}
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bool
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IsIPv4Bogon(const huint32_t& addr);
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constexpr bool
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ipv6_is_siit(const in6_addr& addr)
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{
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return addr.s6_addr[11] == 0xff && addr.s6_addr[10] == 0xff
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&& addr.s6_addr[9] == 0 && addr.s6_addr[8] == 0 && addr.s6_addr[7] == 0
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&& addr.s6_addr[6] == 0 && addr.s6_addr[5] == 0 && addr.s6_addr[4] == 0
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&& addr.s6_addr[3] == 0 && addr.s6_addr[2] == 0 && addr.s6_addr[1] == 0
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&& addr.s6_addr[0] == 0;
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}
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bool
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IsBogon(const in6_addr& addr);
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bool
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IsBogonRange(const in6_addr& host, const in6_addr& mask);
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struct Addr; // fwd declr
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bool
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AllInterfaces(int af, Addr& addr);
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/// get first network interface with public address
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bool
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GetBestNetIF(std::string& ifname, int af = AF_INET);
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/// look at adapter ranges and find a free one
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std::string
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findFreePrivateRange();
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/// look at adapter names and find a free one
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std::string
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findFreeLokiTunIfName();
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/// get network interface address for network interface with ifname
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bool
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GetIFAddr(const std::string& ifname, Addr& addr, int af = AF_INET);
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} // namespace llarp
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#include <net/net_addr.hpp>
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#include <net/net_inaddr.hpp>
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#endif
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