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// This file is a part of the IncludeOS unikernel - www.includeos.org
//
// Copyright 2016 Oslo and Akershus University College of Applied Sciences
// and Alfred Bratterud
//
// Licensed under the Apache License, Version 2.0 (the "License");
// 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.
#include <hw/devices.hpp>
#include <net/inet>
#include <hw/mac_addr.hpp>
namespace net
{
Inet& Super_stack::create(hw::Nic& nic, int N, int sub)
{
INFO("Network", "Creating stack for %s on %s (MTU=%u)",
nic.driver_name(), nic.device_name().c_str(), nic.MTU());
auto& stacks = inet().stacks_.at(N);
auto it = stacks.find(sub);
if(it != stacks.end() and it->second != nullptr) {
throw Super_stack_err{"Stack already exists ["
+ std::to_string(N) + "," + std::to_string(sub) + "]"};
}
auto inet = [&nic]()->auto {
switch(nic.proto()) {
case hw::Nic::Proto::ETH:
return std::make_unique<Inet>(nic);
default:
throw Super_stack_err{"Nic not supported"};
}
}();
Ensures(inet != nullptr);
stacks[sub] = std::move(inet);
return *stacks[sub];
}
Inet& Super_stack::get(int N)
{
if (N < 0 || N >= (int) hw::Devices::devices<hw::Nic>().size())
throw Stack_not_found{"No IP4 stack found with index: " + std::to_string(N) +
". Missing device (NIC) or driver."};
auto& stacks = inet().stacks_.at(N);
if(stacks[0] != nullptr)
return *stacks[0];
// create network stack
auto& nic = hw::Devices::get<hw::Nic>(N);
return inet().create(nic, N, 0);
}
Inet& Super_stack::get(int N, int sub)
{
if (N < 0 || N >= (int) hw::Devices::devices<hw::Nic>().size())
throw Stack_not_found{"No IP4 stack found with index: " + std::to_string(N) +
". Missing device (NIC) or driver."};
auto& stacks = inet().stacks_.at(N);
auto it = stacks.find(sub);
if(it != stacks.end()) {
Expects(it->second != nullptr && "Creating empty subinterfaces doesn't make sense");
return *it->second;
}
throw Stack_not_found{"IP4 Stack not found ["
+ std::to_string(N) + "," + std::to_string(sub) + "]"};
}
Inet& Super_stack::get(const std::string& mac)
{
MAC::Addr link_addr{mac.c_str()};
auto index = hw::Devices::nic_index(link_addr);
// If no NIC, no point looking more
if(index < 0)
throw Stack_not_found{"No NIC found with MAC address " + mac};
auto& stacks = inet().stacks_.at(index);
auto& stack = stacks[0];
if(stack != nullptr) {
Expects(stack->link_addr() == link_addr);
return *stack;
}
// If not found, create
return inet().create(hw::Devices::nic(index), index, 0);
}
// Duplication of code to keep sanity intact
Inet& Super_stack::get(const std::string& mac, int sub)
{
auto index = hw::Devices::nic_index(mac.c_str());
if(index < 0)
throw Stack_not_found{"No NIC found with MAC address " + mac};
return get(index, sub);
}
Super_stack::Super_stack()
{
if (hw::Devices::devices<hw::Nic>().empty())
INFO("Network", "No registered network interfaces found");
for (size_t i = 0; i < hw::Devices::devices<hw::Nic>().size(); i++) {
stacks_.emplace_back();
stacks_.back()[0] = nullptr;
}
}
}