111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
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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, see <http://www.gnu.org/licenses/>.
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*
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* If you would like to incorporate Link into a proprietary software application,
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* please contact <link-devs@ableton.com>.
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*/
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#pragma once
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#include <ableton/platforms/asio/AsioWrapper.hpp>
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#include <ableton/platforms/asio/Util.hpp>
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#include <arpa/inet.h>
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#include <ifaddrs.h>
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#include <net/if.h>
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#include <vector>
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namespace ableton
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{
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namespace platforms
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{
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namespace posix
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{
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namespace detail
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{
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// RAII type to make [get,free]ifaddrs function pairs exception safe
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class GetIfAddrs
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{
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public:
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GetIfAddrs()
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{
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if (getifaddrs(&interfaces)) // returns 0 on success
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{
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interfaces = NULL;
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}
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}
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~GetIfAddrs()
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{
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if (interfaces)
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freeifaddrs(interfaces);
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}
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// RAII must not copy
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GetIfAddrs(GetIfAddrs&) = delete;
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GetIfAddrs& operator=(GetIfAddrs&) = delete;
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template <typename Function>
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void withIfAddrs(Function f)
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{
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if (interfaces)
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f(*interfaces);
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}
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private:
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struct ifaddrs* interfaces = NULL;
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};
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} // namespace detail
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// Posix implementation of ip interface address scanner
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struct ScanIpIfAddrs
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{
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// Scan active network interfaces and return corresponding addresses
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// for all ip-based interfaces.
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std::vector<::asio::ip::address> operator()()
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{
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std::vector<::asio::ip::address> addrs;
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detail::GetIfAddrs getIfAddrs;
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getIfAddrs.withIfAddrs([&addrs](const struct ifaddrs& interfaces) {
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const struct ifaddrs* interface;
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for (interface = &interfaces; interface; interface = interface->ifa_next)
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{
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auto addr = reinterpret_cast<const struct sockaddr_in*>(interface->ifa_addr);
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if (addr && interface->ifa_flags & IFF_UP)
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{
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if (addr->sin_family == AF_INET)
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{
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auto bytes = reinterpret_cast<const char*>(&addr->sin_addr);
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addrs.emplace_back(asio::makeAddress<::asio::ip::address_v4>(bytes));
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}
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else if (addr->sin_family == AF_INET6)
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{
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auto addr6 = reinterpret_cast<const struct sockaddr_in6*>(addr);
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auto bytes = reinterpret_cast<const char*>(&addr6->sin6_addr);
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addrs.emplace_back(asio::makeAddress<::asio::ip::address_v6>(bytes));
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}
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}
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}
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});
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return addrs;
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}
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};
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} // namespace posix
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} // namespace platforms
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} // namespace ableton
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