mirror of
https://github.com/KingDuckZ/kamokan.git
synced 2025-01-13 19:56:40 +00:00
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
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/* Copyright 2017, Michele Santullo
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* This file is part of "tawashi".
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*
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* "tawashi" 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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* "tawashi" 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 "tawashi". If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ip_utils.hpp"
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#include "duckhandy/lexical_cast.hpp"
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#include "duckhandy/int_to_string_ary.hpp"
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#include "cgi_env.hpp"
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#include "tawashiConfig.h"
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#include <spdlog/spdlog.h>
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#include <cassert>
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#include <algorithm>
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#include <ciso646>
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#if !defined(TAWASHI_WITH_IP_LOGGING)
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extern "C" void tiger (const char* parStr, uint64_t parLength, uint64_t parHash[3], char parPadding);
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#endif
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namespace tawashi {
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namespace {
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std::string hash_if_configured (const std::string& parIP) a_always_inline;
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#if !defined(TAWASHI_WITH_IP_LOGGING)
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std::string hashed_ip (const std::string& parIP) {
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using dhandy::tags::hex;
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uint64_t hash[3];
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tiger(parIP.data(), parIP.size(), hash, 0x80);
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auto h1 = dhandy::int_to_string_ary<char, hex>(hash[0]);
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auto h2 = dhandy::int_to_string_ary<char, hex>(hash[1]);
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auto h3 = dhandy::int_to_string_ary<char, hex>(hash[2]);
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std::string retval(2 * sizeof(uint64_t) * 3, '0');
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assert(h1.size() <= 2 * sizeof(uint64_t));
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std::copy(h1.begin(), h1.end(), retval.begin() + 2 * sizeof(uint64_t) * 0 + 2 * sizeof(uint64_t) - h1.size());
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assert(h2.size() <= 2 * sizeof(uint64_t));
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std::copy(h2.begin(), h2.end(), retval.begin() + 2 * sizeof(uint64_t) * 1 + 2 * sizeof(uint64_t) - h2.size());
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assert(h3.size() <= 2 * sizeof(uint64_t));
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std::copy(h3.begin(), h3.end(), retval.begin() + 2 * sizeof(uint64_t) * 2 + 2 * sizeof(uint64_t) - h3.size());
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SPDLOG_DEBUG(spdlog::get("statuslog"), "IP \"{}\" hashed -> \"{}\"", parIP, retval);
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assert(retval.size() == 16 * 3);
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return retval;
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}
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#endif
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inline std::string hash_if_configured (const std::string& parIP) {
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#if defined(TAWASHI_WITH_IP_LOGGING)
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return parIP;
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#else
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return hashed_ip(parIP);
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#endif
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}
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} //unnamed namespace
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//see: https://stackoverflow.com/questions/18799808/how-do-i-count-unique-visitors-to-my-site
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std::string guess_real_remote_ip (const cgi::Env& parCgiEnv) {
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if (not parCgiEnv.http_client_ip().empty()) {
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return hash_if_configured(parCgiEnv.http_client_ip());
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}
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else if (not parCgiEnv.http_x_forwarded_for().empty()) {
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return hash_if_configured(parCgiEnv.http_x_forwarded_for());
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}
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else {
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return hash_if_configured(parCgiEnv.remote_addr());
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}
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}
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} //namespace tawashi
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