3c25d989f3
The nic_router component can be used to individually route IPv4 packets between multiple NIC sessions. Thereby, it can translate between different IP subnets. The component supports port forwarding, as well as the partitioning of the TCP and UDP port spaces. Fixes #114
58 lines
1.2 KiB
C++
58 lines
1.2 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 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 General Public License version 2.
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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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Arp_cache_entry::Arp_cache_entry(Ipv4_address ip_addr, Mac_address mac_addr)
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:
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_ip_addr(ip_addr), _mac_addr(mac_addr)
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{ }
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bool Arp_cache_entry::higher(Arp_cache_entry *entry)
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{
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return (memcmp(&entry->_ip_addr.addr, &_ip_addr.addr,
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sizeof(_ip_addr.addr)) > 0);
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}
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Arp_cache_entry &Arp_cache_entry::find_by_ip_addr(Ipv4_address ip_addr)
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{
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if (ip_addr == _ip_addr) {
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return *this; }
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bool const side =
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memcmp(&ip_addr.addr, _ip_addr.addr, sizeof(_ip_addr.addr)) > 0;
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Arp_cache_entry * entry = Avl_node<Arp_cache_entry>::child(side);
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if (!entry) {
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throw Arp_cache::No_matching_entry(); }
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return entry->find_by_ip_addr(ip_addr);
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}
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Arp_cache_entry &Arp_cache::find_by_ip_addr(Ipv4_address ip_addr)
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{
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Arp_cache_entry * const entry = first();
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if (!entry) {
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throw No_matching_entry(); }
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return entry->find_by_ip_addr(ip_addr);
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}
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