12bce3f4fc
Instead of l3 (arp/ipv4) pushing packets into interface's queue, make them register functions that interface can use to ask l3 for packets.
64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
/*
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* Copyright (C) 2014 Cloudius Systems, Ltd.
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*/
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#include "arp.hh"
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namespace net {
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arp_for_protocol::arp_for_protocol(arp& a, uint16_t proto_num)
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: _arp(a), _proto_num(proto_num) {
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_arp.add(proto_num, this);
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}
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arp_for_protocol::~arp_for_protocol() {
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_arp.del(_proto_num);
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}
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arp::arp(interface* netif) : _netif(netif), _proto(netif, eth_protocol_num::arp, [this] { return get_packet(); })
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, _rx_packets(_proto.receive([this] (packet p, ethernet_address ea) {
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return process_packet(std::move(p), ea);
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},
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[this](forward_hash& out_hash_data, packet& p, size_t off) {
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return forward(out_hash_data, p, off);
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})) {
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}
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std::experimental::optional<l3_protocol::l3packet> arp::get_packet() {
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std::experimental::optional<l3_protocol::l3packet> p;
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if (!_packetq.empty()) {
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p = std::move(_packetq.front());
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_packetq.pop_front();
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}
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return p;
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}
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bool arp::forward(forward_hash& out_hash_data, packet& p, size_t off) {
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auto ah = p.get_header<arp_hdr>(off);
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auto i = _arp_for_protocol.find(ntoh(ah->ptype));
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if (i != _arp_for_protocol.end()) {
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return i->second->forward(out_hash_data, p, off);
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}
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return false;
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}
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void arp::add(uint16_t proto_num, arp_for_protocol* afp) {
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_arp_for_protocol[proto_num] = afp;
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}
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void arp::del(uint16_t proto_num) {
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_arp_for_protocol.erase(proto_num);
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}
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future<>
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arp::process_packet(packet p, ethernet_address from) {
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auto ah = ntoh(*p.get_header<arp_hdr>());
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auto i = _arp_for_protocol.find(ah.ptype);
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if (i != _arp_for_protocol.end()) {
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i->second->received(std::move(p));
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}
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return make_ready_future<>();
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}
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}
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