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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2014 Cloudius Systems, Ltd.
*/
#include "ARP.h"
arp_for_protocol::arp_for_protocol(arp& a, uint16_t proto_num)
: _arp(a), _proto_num(proto_num)
{
_arp.add(proto_num, this);
}
arp_for_protocol::~arp_for_protocol()
{
_arp.del(_proto_num);
}
arp::arp(interface* netif):
_netif(netif),
_proto(netif, eth_protocol_num::arp, [this] { return get_packet(); }),
_rx_packets(
_proto.receive(
[this] (Packet p, ethernet_address ea) {
return process_packet(std::move(p), ea);
},
[this](forward_hash& out_hash_data, Packet& p, size_t off) {
return forward(out_hash_data, p, off);
}
)
)
{}
Tub<l3_protocol::l3packet> arp::get_packet()
{
Tub<l3_protocol::l3packet> p;
if (!_packetq.empty()) {
p = std::move(_packetq.front());
_packetq.pop_front();
}
return p;
}
bool arp::forward(forward_hash& out_hash_data, Packet& p, size_t off)
{
auto ah = p.get_header<arp_hdr>(off);
auto i = _arp_for_protocol.find(ntoh(ah->ptype));
if (i != _arp_for_protocol.end()) {
return i->second->forward(out_hash_data, p, off);
}
return false;
}
void arp::add(uint16_t proto_num, arp_for_protocol* afp)
{
_arp_for_protocol[proto_num] = afp;
}
void arp::del(uint16_t proto_num)
{
_arp_for_protocol.erase(proto_num);
}
int arp::process_packet(Packet p, ethernet_address from)
{
auto ah = p.get_header<arp_hdr>()->ntoh();
auto i = _arp_for_protocol.find(ah.ptype);
if (i != _arp_for_protocol.end()) {
i->second->received(std::move(p));
}
return 0;
}
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