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https://github.com/mmueller41/genode.git
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a845dffa63
A userland component that ports the Linux WireGuard kernel module (originally from kernel version 5.14.21) and integrates it via a NIC session (public network side) and an Uplink session (private network side). The WireGuard-specific device configuration is done through the component configuration. The port is done using lx_emul, lx_kit and the virt_linux targets. The commit adds also 4 corresponding run scripts of which 3 are fully automated of which 1 is added to the autopilot. :Warning: Although in principal functioning, the WireGuard port has not been exposed to a sufficient amount of real-world testing, so far. Therefore, we strongly recommend not to use it in any security-critical scenarios! There is no guarantee that the port meets any of the security goals pursued by the WireGuard protocol or other WireGuard implementations! Ref #4397
100 lines
2.0 KiB
C++
100 lines
2.0 KiB
C++
/*
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* \brief Cache for received ARP information
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* \author Martin Stein
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* \date 2016-08-19
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*/
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/*
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* Copyright (C) 2016-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* local includes */
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#include <arp_cache.h>
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using namespace Net;
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using namespace Genode;
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/*********************
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** Arp_cache_entry **
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*********************/
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Arp_cache_entry::Arp_cache_entry(Ipv4_address const &ip,
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Mac_address const &mac)
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:
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_ip(ip), _mac(mac)
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{ }
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bool Arp_cache_entry::_higher(Ipv4_address const &ip) const
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{
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return memcmp(ip.addr, _ip.addr, sizeof(_ip.addr)) > 0;
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}
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Arp_cache_result Arp_cache_entry::find_by_ip(Ipv4_address const &ip) const
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{
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if (ip == _ip) {
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return Const_pointer<Arp_cache_entry> { *this };
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}
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Arp_cache_entry const *const entry = child(_higher(ip));
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if (!entry) {
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return Arp_cache_result(Arp_cache_error::NO_MATCH);
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}
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return entry->find_by_ip(ip);
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}
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void Arp_cache_entry::print(Output &output) const
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{
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Genode::print(output, _ip, " > ", _mac);
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}
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/***************
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** Arp_cache **
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***************/
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void Arp_cache::new_entry(Ipv4_address const &ip, Mac_address const &mac)
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{
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if (_entries[_curr].constructed()) {
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remove(&(*_entries[_curr]));
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}
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_entries[_curr].construct(ip, mac);
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Arp_cache_entry &entry = *_entries[_curr];
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insert(&entry);
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if (_curr < NR_OF_ENTRIES - 1) {
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_curr++;
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} else {
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_curr = 0;
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};
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}
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Arp_cache_result Arp_cache::find_by_ip(Ipv4_address const &ip) const
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{
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if (!first()) {
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return Arp_cache_error::NO_MATCH;
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}
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return first()->find_by_ip(ip);
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}
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void Arp_cache::destroy_entries_with_mac(Mac_address const &mac)
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{
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for (unsigned curr = 0; curr < NR_OF_ENTRIES; curr++) {
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try {
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Arp_cache_entry &entry = *_entries[curr];
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if (entry.mac() != mac) {
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continue;
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}
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log("destroy ARP entry ", entry);
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remove(&entry);
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_entries[curr].destruct();
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} catch (Arp_cache_entry_slot::Deref_unconstructed_object) { }
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}
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}
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