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https://github.com/oxen-io/oxen-storage-server.git
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466babe353
address_v4::to_ulong() already does the desired conversion to host order before returning the value.
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
#include "ip_utils.h"
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#include <tuple>
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#include <boost/endian/conversion.hpp>
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namespace oxen {
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/// Most of this file is copied from lokid (https://github.com/oxen-io/oxen-core/pull/1393)
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uint32_t netmask_ipv4_bits(int prefix) {
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if (prefix) {
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return ~((1 << (32 - prefix)) - 1);
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} else {
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return uint32_t{0};
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}
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}
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uint32_t ipaddr_ipv4_bits(const uint8_t a, const uint8_t b, const uint8_t c,
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const uint8_t d) {
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return ((a << 24) | (b << 16) | (c << 8) | d);
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}
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std::tuple<uint32_t, uint32_t> FromIPv4(const uint8_t a, const uint8_t b,
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const uint8_t c, const uint8_t d,
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const uint32_t netmask) {
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return std::tuple<uint32_t, uint32_t>{ipaddr_ipv4_bits(a, b, c, d),
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netmask_ipv4_bits(netmask)};
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}
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// clang-format off
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std::array bogonRanges = { FromIPv4(0, 0, 0, 0, 8),
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FromIPv4(10, 0, 0, 0, 8),
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FromIPv4(100, 64, 0, 0, 10),
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FromIPv4(127, 0, 0, 0, 8),
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FromIPv4(169, 254, 0, 0, 16),
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FromIPv4(172, 16, 0, 0, 12),
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FromIPv4(192, 0, 0, 0, 24),
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FromIPv4(192, 0, 2, 0, 24),
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FromIPv4(192, 88, 99, 0, 24),
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FromIPv4(192, 168, 0, 0, 16),
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FromIPv4(198, 18, 0, 0, 15),
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FromIPv4(198, 51, 100, 0, 24),
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FromIPv4(203, 0, 113, 0, 24),
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FromIPv4(224, 0, 0, 0, 4),
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FromIPv4(240, 0, 0, 0, 4) };
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// clang-format on
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static bool is_ip_public_inner(const uint32_t ip)
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{
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for(const auto ipRange: bogonRanges) {
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uint32_t netstart = (std::get<0>(ipRange) & std::get<1>(ipRange)); // first ip in subnet
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uint32_t netend = (netstart | ~std::get<1>(ipRange)); // last ip in subnet
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if ((ip >= netstart) && (ip <= netend))
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return false;
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}
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return true;
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}
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bool is_ip_public(boost::asio::ip::address_v4 addr) {
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uint32_t bytes = addr.to_ulong();
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return is_ip_public_inner(bytes);
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}
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} // namespace oxen
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