2018-10-19 23:34:09 +00:00
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// Copyright 2018 Google LLC
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2018-04-27 17:37:02 +00:00
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package epsocket
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import (
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"gvisor.googlesource.com/gvisor/pkg/abi/linux"
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"gvisor.googlesource.com/gvisor/pkg/log"
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"gvisor.googlesource.com/gvisor/pkg/sentry/inet"
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"gvisor.googlesource.com/gvisor/pkg/syserr"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv4"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv6"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/stack"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/transport/tcp"
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)
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// Stack implements inet.Stack for netstack/tcpip/stack.Stack.
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2018-08-02 17:41:44 +00:00
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//
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// +stateify savable
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2018-04-27 17:37:02 +00:00
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type Stack struct {
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Stack *stack.Stack `state:"manual"`
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}
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// SupportsIPv6 implements Stack.SupportsIPv6.
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func (s *Stack) SupportsIPv6() bool {
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return s.Stack.CheckNetworkProtocol(ipv6.ProtocolNumber)
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}
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// Interfaces implements inet.Stack.Interfaces.
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func (s *Stack) Interfaces() map[int32]inet.Interface {
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is := make(map[int32]inet.Interface)
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for id, ni := range s.Stack.NICInfo() {
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2018-08-09 05:38:41 +00:00
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var devType uint16
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if ni.Flags.Loopback {
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devType = linux.ARPHRD_LOOPBACK
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}
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2018-04-27 17:37:02 +00:00
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is[int32(id)] = inet.Interface{
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2018-08-09 05:38:41 +00:00
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Name: ni.Name,
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Addr: []byte(ni.LinkAddress),
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Flags: uint32(nicStateFlagsToLinux(ni.Flags)),
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DeviceType: devType,
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MTU: ni.MTU,
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2018-04-27 17:37:02 +00:00
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}
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}
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return is
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}
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// InterfaceAddrs implements inet.Stack.InterfaceAddrs.
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func (s *Stack) InterfaceAddrs() map[int32][]inet.InterfaceAddr {
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nicAddrs := make(map[int32][]inet.InterfaceAddr)
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for id, ni := range s.Stack.NICInfo() {
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var addrs []inet.InterfaceAddr
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for _, a := range ni.ProtocolAddresses {
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var family uint8
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switch a.Protocol {
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case ipv4.ProtocolNumber:
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family = linux.AF_INET
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case ipv6.ProtocolNumber:
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family = linux.AF_INET6
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default:
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log.Warningf("Unknown network protocol in %+v", a)
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continue
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}
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addrs = append(addrs, inet.InterfaceAddr{
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Family: family,
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PrefixLen: uint8(len(a.Address) * 8),
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Addr: []byte(a.Address),
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// TODO: Other fields.
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})
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}
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nicAddrs[int32(id)] = addrs
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}
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return nicAddrs
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}
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// TCPReceiveBufferSize implements inet.Stack.TCPReceiveBufferSize.
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func (s *Stack) TCPReceiveBufferSize() (inet.TCPBufferSize, error) {
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var rs tcp.ReceiveBufferSizeOption
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err := s.Stack.TransportProtocolOption(tcp.ProtocolNumber, &rs)
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return inet.TCPBufferSize{
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Min: rs.Min,
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Default: rs.Default,
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Max: rs.Max,
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}, syserr.TranslateNetstackError(err).ToError()
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}
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// SetTCPReceiveBufferSize implements inet.Stack.SetTCPReceiveBufferSize.
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func (s *Stack) SetTCPReceiveBufferSize(size inet.TCPBufferSize) error {
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rs := tcp.ReceiveBufferSizeOption{
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Min: size.Min,
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Default: size.Default,
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Max: size.Max,
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}
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return syserr.TranslateNetstackError(s.Stack.SetTransportProtocolOption(tcp.ProtocolNumber, rs)).ToError()
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}
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// TCPSendBufferSize implements inet.Stack.TCPSendBufferSize.
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func (s *Stack) TCPSendBufferSize() (inet.TCPBufferSize, error) {
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var ss tcp.SendBufferSizeOption
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err := s.Stack.TransportProtocolOption(tcp.ProtocolNumber, &ss)
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return inet.TCPBufferSize{
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Min: ss.Min,
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Default: ss.Default,
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Max: ss.Max,
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}, syserr.TranslateNetstackError(err).ToError()
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}
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// SetTCPSendBufferSize implements inet.Stack.SetTCPSendBufferSize.
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func (s *Stack) SetTCPSendBufferSize(size inet.TCPBufferSize) error {
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ss := tcp.SendBufferSizeOption{
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Min: size.Min,
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Default: size.Default,
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Max: size.Max,
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}
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return syserr.TranslateNetstackError(s.Stack.SetTransportProtocolOption(tcp.ProtocolNumber, ss)).ToError()
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}
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// TCPSACKEnabled implements inet.Stack.TCPSACKEnabled.
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func (s *Stack) TCPSACKEnabled() (bool, error) {
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var sack tcp.SACKEnabled
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err := s.Stack.TransportProtocolOption(tcp.ProtocolNumber, &sack)
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return bool(sack), syserr.TranslateNetstackError(err).ToError()
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}
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// SetTCPSACKEnabled implements inet.Stack.SetTCPSACKEnabled.
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func (s *Stack) SetTCPSACKEnabled(enabled bool) error {
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return syserr.TranslateNetstackError(s.Stack.SetTransportProtocolOption(tcp.ProtocolNumber, tcp.SACKEnabled(enabled))).ToError()
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}
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