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54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#pragma once
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#include "net_int.hpp"
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namespace llarp
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{
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/// get a netmask with the higest numset bits set
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constexpr huint128_t
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_netmask_ipv6_bits(uint32_t numset)
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{
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return (128 - numset) ? (huint128_t{1} << numset) | _netmask_ipv6_bits(numset + 1)
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: huint128_t{0};
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}
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constexpr huint128_t
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netmask_ipv6_bits(uint32_t numset)
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{
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return _netmask_ipv6_bits(128 - numset);
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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 a 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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return huint32_t{(d) | (c << 8) | (b << 16) | (a << 24)};
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}
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// IPv4 mapped address live at ::ffff:0:0/96
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constexpr std::array<uint8_t, 12> ipv4_map_prefix{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff};
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namespace net
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{
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inline auto
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ipaddr_netmask_bits(uint32_t bits, int af)
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{
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if (af == AF_INET6)
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return netmask_ipv6_bits(bits);
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return ExpandV4(netmask_ipv4_bits(bits));
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};
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} // namespace net
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} // namespace llarp
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