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60 lines
1.7 KiB
60 lines
1.7 KiB
/*
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* Copyright (c) 2022 by Geoffrey Merck F4FXL / KC3FRA
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <sys/types.h>
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#include <cstring>
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#include "NetUtils.h"
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bool CNetUtils::lookupV4(const std::string& hostname, sockaddr_storage& addr)
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{
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struct addrinfo hints;
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::memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET;
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return lookup(hostname, addr, hints);
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}
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bool CNetUtils::lookupV6(const std::string& hostname, sockaddr_storage& addr)
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{
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struct addrinfo hints;
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::memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET6;
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return lookup(hostname, addr, hints);
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}
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bool CNetUtils::lookup(const std::string& hostname, sockaddr_storage& addr, struct addrinfo& hints)
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{
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struct addrinfo *res;
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int err = getaddrinfo(hostname.c_str(), nullptr, &hints, &res);
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if(err != 0) {
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::memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET;
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lookup("255.255.255.255", addr, hints);
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return false;
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}
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::memcpy(&addr, res->ai_addr, res->ai_addrlen);
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::freeaddrinfo(res);
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return true;
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} |