105 lines
3.0 KiB
Go
105 lines
3.0 KiB
Go
// Copyright 2018 Google LLC
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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 inet defines semantics for IP stacks.
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package inet
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// Stack represents a TCP/IP stack.
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type Stack interface {
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// Interfaces returns all network interfaces as a mapping from interface
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// indexes to interface properties. Interface indices are strictly positive
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// integers.
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Interfaces() map[int32]Interface
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// InterfaceAddrs returns all network interface addresses as a mapping from
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// interface indexes to a slice of associated interface address properties.
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InterfaceAddrs() map[int32][]InterfaceAddr
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// SupportsIPv6 returns true if the stack supports IPv6 connectivity.
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SupportsIPv6() bool
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// TCPReceiveBufferSize returns TCP receive buffer size settings.
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TCPReceiveBufferSize() (TCPBufferSize, error)
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// SetTCPReceiveBufferSize attempts to change TCP receive buffer size
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// settings.
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SetTCPReceiveBufferSize(size TCPBufferSize) error
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// TCPSendBufferSize returns TCP send buffer size settings.
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TCPSendBufferSize() (TCPBufferSize, error)
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// SetTCPSendBufferSize attempts to change TCP send buffer size settings.
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SetTCPSendBufferSize(size TCPBufferSize) error
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// TCPSACKEnabled returns true if RFC 2018 TCP Selective Acknowledgements
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// are enabled.
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TCPSACKEnabled() (bool, error)
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// SetTCPSACKEnabled attempts to change TCP selective acknowledgement
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// settings.
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SetTCPSACKEnabled(enabled bool) error
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}
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// Interface contains information about a network interface.
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type Interface struct {
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// Keep these fields sorted in the order they appear in rtnetlink(7).
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// DeviceType is the device type, a Linux ARPHRD_* constant.
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DeviceType uint16
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// Flags is the device flags; see netdevice(7), under "Ioctls",
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// "SIOCGIFFLAGS, SIOCSIFFLAGS".
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Flags uint32
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// Name is the device name.
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Name string
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// Addr is the hardware device address.
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Addr []byte
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// MTU is the maximum transmission unit.
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MTU uint32
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}
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// InterfaceAddr contains information about a network interface address.
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type InterfaceAddr struct {
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// Keep these fields sorted in the order they appear in rtnetlink(7).
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// Family is the address family, a Linux AF_* constant.
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Family uint8
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// PrefixLen is the address prefix length.
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PrefixLen uint8
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// Flags is the address flags.
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Flags uint8
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// Addr is the actual address.
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Addr []byte
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}
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// TCPBufferSize contains settings controlling TCP buffer sizing.
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//
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// +stateify savable
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type TCPBufferSize struct {
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// Min is the minimum size.
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Min int
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// Default is the default size.
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Default int
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// Max is the maximum size.
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Max int
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}
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