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49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#pragma once
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#include <net/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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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 && addr.s6_addr[9] == 0
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&& addr.s6_addr[8] == 0 && addr.s6_addr[7] == 0 && addr.s6_addr[6] == 0
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&& addr.s6_addr[5] == 0 && addr.s6_addr[4] == 0 && addr.s6_addr[3] == 0
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&& addr.s6_addr[2] == 0 && addr.s6_addr[1] == 0 && addr.s6_addr[0] == 0;
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}
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} // namespace llarp
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