| // Copyright 2019 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "arc/network/address_manager.h" |
| |
| namespace arc_networkd { |
| |
| namespace { |
| |
| // The 100.115.92.0/24 subnet is reserved and not publicly routable. This subnet |
| // is sliced into the following IP pools for use among the various guests: |
| // +---------------+------------+----------------------------------------------+ |
| // | IP Range | Guest | | |
| // +---------------+------------+----------------------------------------------+ |
| // | 0 (/30) | ARC | Also used for legacy single network ARC++ | |
| // | 4 (/30) | ARCVM | Currently a hard-coded reservation | |
| // | 8-20 (/30) | ARC | Used to expose multiple host networks to ARC | |
| // | 24-124 (/30) | Termina VM | Used by Crostini | |
| // | 128-140 (/28) | Plugin VM | Used by Crostini | |
| // | 144-188 | Reserved | | |
| // | 192-252 (/28) | Containers | Used by Crostini | |
| // +---------------+------------+----------------------------------------------+ |
| |
| constexpr uint32_t kBaseAddress = 0x64735c00; // 100.115.92.0 (host order) |
| constexpr uint32_t kDefaultSubnetPrefix = 30; |
| |
| } // namespace |
| |
| AddressManager::AddressManager( |
| std::initializer_list<AddressManager::Guest> guests) { |
| for (auto g : guests) { |
| uint32_t base_addr = kBaseAddress; |
| uint32_t prefix = kDefaultSubnetPrefix; |
| uint32_t subnets = 1; |
| switch (g) { |
| case Guest::ARC: |
| break; |
| case Guest::VM_ARC: |
| base_addr += 4; |
| break; |
| case Guest::ARC_NET: |
| base_addr += 8; |
| subnets = 4; |
| break; |
| case Guest::VM_TERMINA: |
| base_addr += 24; |
| subnets = 26; |
| break; |
| case Guest::VM_PLUGIN: |
| base_addr += 128; |
| prefix = 28; |
| break; |
| case Guest::CONTAINER: |
| base_addr += 192; |
| prefix = 28; |
| subnets = 4; |
| break; |
| } |
| pools_.emplace(g, SubnetPool::New(base_addr, prefix, subnets)); |
| } |
| } |
| |
| MacAddress AddressManager::GenerateMacAddress() { |
| return mac_addrs_.Generate(); |
| } |
| |
| std::unique_ptr<Subnet> AddressManager::AllocateIPv4Subnet( |
| AddressManager::Guest guest) { |
| const auto it = pools_.find(guest); |
| return (it != pools_.end()) ? it->second->Allocate() : nullptr; |
| } |
| |
| } // namespace arc_networkd |
