mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 16:00:57 +01:00
130 lines
2.5 KiB
C++
130 lines
2.5 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <RB_INC_IFADDRS_H
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#ifdef HAVE_IFADDRS_H
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bool
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ircd::net::addrs::has_usable_ipv6_interface()
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try
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{
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return !for_each([](const addr &a)
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{
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if(a.family != AF_INET6)
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return true;
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if(a.scope_id != 0) // global scope
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return true;
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if(~a.flags & IFF_UP) // not up
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return true;
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if(a.flags & IFF_LOOPBACK) // not usable
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return true;
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// return false to break
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return false;
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});
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}
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catch(const std::exception &e)
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{
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log::error
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{
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log, "Failed to check for usable IPv6 interfaces :%s",
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e.what()
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};
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return false;
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}
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#else
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bool
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ircd::net::addrs::has_usable_ipv6_interface()
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{
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return false;
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}
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#endif
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#ifdef HAVE_IFADDRS_H
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[[GCC::optimize(0), clang::optnone]] //XXX: trouble
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bool
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ircd::net::addrs::for_each(const closure &closure)
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{
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return for_each(raw_closure{[&closure]
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(const struct ::ifaddrs *const &ifa)
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{
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addr a;
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a.name = ifa->ifa_name;
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a.flags = ifa->ifa_flags;
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if(ifa->ifa_addr) switch(ifa->ifa_addr->sa_family)
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{
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case AF_INET6:
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{
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const auto sin(reinterpret_cast<const struct ::sockaddr_in6 *>(ifa->ifa_addr));
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const auto ip(reinterpret_cast<const uint128_t *>(sin->sin6_addr.s6_addr));
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a.family = sin->sin6_family;
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a.scope_id = sin->sin6_scope_id;
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a.flowinfo = sin->sin6_flowinfo;
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a.address =
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{
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ntoh(*ip), sin->sin6_port
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};
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break;
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}
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case AF_INET:
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{
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const auto &sin(reinterpret_cast<const struct ::sockaddr_in *>(ifa->ifa_addr));
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a.family = sin->sin_family;
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a.address =
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{
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ntoh(sin->sin_addr.s_addr), sin->sin_port
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};
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break;
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}
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default:
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return true;
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}
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return closure(a);
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}});
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}
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#else
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bool
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ircd::net::addrs::for_each(const closure &closure)
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{
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return true;
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}
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#endif
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#ifdef HAVE_IFADDRS_H
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bool
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ircd::net::addrs::for_each(const raw_closure &closure)
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{
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struct ::ifaddrs *ifap_;
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syscall(::getifaddrs, &ifap_);
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const custom_ptr<struct ::ifaddrs> ifap
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{
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ifap_, ::freeifaddrs
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};
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for(auto ifa(ifap.get()); ifa; ifa = ifa->ifa_next)
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if(!closure(ifa))
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return false;
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return true;
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}
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#else
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bool
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ircd::net::addrs::for_each(const raw_closure &closure)
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{
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return true;
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}
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#endif
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