mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
3fbe0a2701
Signed-off-by: David Sommerseth <davids@openvpn.net>
219 lines
6.2 KiB
C++
219 lines
6.2 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2020 OpenVPN Inc.
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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 Affero General Public License Version 3
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// as published by the Free Software Foundation.
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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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Enumerate iOS network interfaces
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#ifndef OPENVPN_NETCONF_ENUMIFACE_H
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#define OPENVPN_NETCONF_ENUMIFACE_H
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <ifaddrs.h>
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#ifdef OPENVPN_PLATFORM_IPHONE
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#include <openvpn/netconf/ios/net-route.h>
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#else
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#include <net/route.h>
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#endif
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#include <cstring>
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#include <string>
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#include <sstream>
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#include <memory>
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#include <openvpn/common/size.hpp>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/addr/ip.hpp>
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namespace openvpn {
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class EnumIface
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{
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public:
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OPENVPN_EXCEPTION(enum_iface_error);
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EnumIface()
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: ifinfo(alloc_if_addrs(), free_if_addrs)
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{
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}
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std::string to_string() const
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{
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std::ostringstream os;
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os << "INTERFACES:" << std::endl;
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for (const ifaddrs* i = ifinfo.get(); i->ifa_next; i = i->ifa_next)
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render(i, os);
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return os.str();
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}
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bool iface_up(const char *iface) const
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{
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for (const ifaddrs* i = ifinfo.get(); i->ifa_next; i = i->ifa_next)
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{
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if (!std::strcmp(iface, i->ifa_name)
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&& (i->ifa_flags & RTF_UP)
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&& IP::Addr::sockaddr_defined(i->ifa_addr))
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return true;
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}
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return false;
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}
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protected:
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static void render(const ifaddrs* i, std::ostream& os)
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{
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try {
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os << i->ifa_name;
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os << ' ' << render_flags(i->ifa_flags);
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if (i->ifa_addr)
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{
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const IP::Addr a = IP::Addr::from_sockaddr(i->ifa_addr);
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if (a.defined())
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os << ' ' << a;
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}
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if (i->ifa_netmask)
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{
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const IP::Addr nm = IP::Addr::from_sockaddr(i->ifa_netmask);
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if (nm.defined())
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{
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try {
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unsigned int pl = nm.prefix_len();
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os << '/' << pl;
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}
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catch (const std::exception&)
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{
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}
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}
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}
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if (i->ifa_dstaddr)
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{
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const IP::Addr dst = IP::Addr::from_sockaddr(i->ifa_dstaddr);
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if (dst.defined())
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os << " (" << dst << ')';
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}
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}
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catch (const std::exception&)
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{
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os << " ERROR";
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}
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os << std::endl;
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}
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static std::string render_flags(const u_int flags)
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{
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struct flag_info {
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u_int flag;
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char c;
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};
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static const struct flag_info flag_info[] = {
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# ifdef RTF_UP
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{ RTF_UP, 'U' }, // Route usable
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# endif
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# ifdef RTF_GATEWAY
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{ RTF_GATEWAY, 'G' }, // Destination requires forwarding by intermediary
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# endif
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# ifdef RTF_HOST
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{ RTF_HOST, 'H' }, // Host entry (net otherwise)
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# endif
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# ifdef RTF_REJECT
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{ RTF_REJECT, 'R' }, // Host or net unreachable
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# endif
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# ifdef RTF_DYNAMIC
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{ RTF_DYNAMIC, 'D' }, // Created dynamically (by redirect)
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# endif
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# ifdef RTF_MODIFIED
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{ RTF_MODIFIED, 'M' }, // Modified dynamically (by redirect)
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# endif
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# ifdef RTF_CLONING
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{ RTF_CLONING, 'C' }, // Generate new routes on use
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# endif
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# ifdef RTF_XRESOLVE
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{ RTF_XRESOLVE, 'X' }, // External daemon translates proto to link address
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# endif
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# ifdef RTF_LLINFO
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{ RTF_LLINFO, 'L' }, // Valid protocol to link address translation
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# endif
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# ifdef RTF_STATIC
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{ RTF_STATIC, 'S' }, // Manually added
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# endif
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# ifdef RTF_BLACKHOLE
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{ RTF_BLACKHOLE, 'B' }, // Just discard packets (during updates)
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# endif
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# ifdef RTF_PROTO2
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{ RTF_PROTO2, '2' }, // Protocol specific routing flag #2
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# endif
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# ifdef RTF_PROTO1
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{ RTF_PROTO1, '1' }, // Protocol specific routing flag #1
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# endif
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# ifdef RTF_PRCLONING
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{ RTF_PRCLONING, 'c' }, // Protocol-specified generate new routes on use
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# endif
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# ifdef RTF_WASCLONED
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{ RTF_WASCLONED, 'W' }, // Route was generated as a result of cloning
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# endif
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# ifdef RTF_PROTO3
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{ RTF_PROTO3, '3' }, // Protocol specific routing flag #3
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# endif
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# ifdef RTF_BROADCAST
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{ RTF_BROADCAST, 'b' }, // The route represents a broadcast address
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# endif
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# ifdef RTF_MULTICAST
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{ RTF_MULTICAST, 'm' }, // The route represents a multicast address
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# endif
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# ifdef RTF_IFSCOPE
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{ RTF_IFSCOPE, 'I' }, // Route is associated with an interface scope
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# endif
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# ifdef RTF_IFREF
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{ RTF_IFREF, 'i' }, // Route is holding a reference to the interface
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# endif
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# ifdef RTF_PROXY
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{ RTF_PROXY, 'Y' }, // Proxying; cloned routes will not be scoped
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# endif
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# ifdef RTF_ROUTER
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{ RTF_ROUTER, 'r' }, // Host is a default router
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# endif
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{ 0, '\0' },
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};
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std::string ret;
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for (const struct flag_info *fi = flag_info; fi->flag; ++fi)
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if (flags & fi->flag)
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ret += fi->c;
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return ret;
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}
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static ifaddrs* alloc_if_addrs()
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{
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ifaddrs* ifa = nullptr;
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::getifaddrs(&ifa);
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return ifa;
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}
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static void free_if_addrs(ifaddrs* p)
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{
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// delete method for pointer returned by getifaddrs
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freeifaddrs(p);
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}
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std::unique_ptr<ifaddrs, decltype(&free_if_addrs)> ifinfo;
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};
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}
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#endif
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