156 lines
4.2 KiB
Go
156 lines
4.2 KiB
Go
// Copyright 2018 The gVisor Authors.
|
|
//
|
|
// 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.
|
|
|
|
// Package inet defines semantics for IP stacks.
|
|
package inet
|
|
|
|
// Stack represents a TCP/IP stack.
|
|
type Stack interface {
|
|
// Interfaces returns all network interfaces as a mapping from interface
|
|
// indexes to interface properties. Interface indices are strictly positive
|
|
// integers.
|
|
Interfaces() map[int32]Interface
|
|
|
|
// InterfaceAddrs returns all network interface addresses as a mapping from
|
|
// interface indexes to a slice of associated interface address properties.
|
|
InterfaceAddrs() map[int32][]InterfaceAddr
|
|
|
|
// SupportsIPv6 returns true if the stack supports IPv6 connectivity.
|
|
SupportsIPv6() bool
|
|
|
|
// TCPReceiveBufferSize returns TCP receive buffer size settings.
|
|
TCPReceiveBufferSize() (TCPBufferSize, error)
|
|
|
|
// SetTCPReceiveBufferSize attempts to change TCP receive buffer size
|
|
// settings.
|
|
SetTCPReceiveBufferSize(size TCPBufferSize) error
|
|
|
|
// TCPSendBufferSize returns TCP send buffer size settings.
|
|
TCPSendBufferSize() (TCPBufferSize, error)
|
|
|
|
// SetTCPSendBufferSize attempts to change TCP send buffer size settings.
|
|
SetTCPSendBufferSize(size TCPBufferSize) error
|
|
|
|
// TCPSACKEnabled returns true if RFC 2018 TCP Selective Acknowledgements
|
|
// are enabled.
|
|
TCPSACKEnabled() (bool, error)
|
|
|
|
// SetTCPSACKEnabled attempts to change TCP selective acknowledgement
|
|
// settings.
|
|
SetTCPSACKEnabled(enabled bool) error
|
|
|
|
// Statistics reports stack statistics.
|
|
Statistics(stat interface{}, arg string) error
|
|
|
|
// RouteTable returns the network stack's route table.
|
|
RouteTable() []Route
|
|
|
|
// Resume restarts the network stack after restore.
|
|
Resume()
|
|
}
|
|
|
|
// Interface contains information about a network interface.
|
|
type Interface struct {
|
|
// DeviceType is the device type, a Linux ARPHRD_* constant.
|
|
DeviceType uint16
|
|
|
|
// Flags is the device flags; see netdevice(7), under "Ioctls",
|
|
// "SIOCGIFFLAGS, SIOCSIFFLAGS".
|
|
Flags uint32
|
|
|
|
// Name is the device name.
|
|
Name string
|
|
|
|
// Addr is the hardware device address.
|
|
Addr []byte
|
|
|
|
// MTU is the maximum transmission unit.
|
|
MTU uint32
|
|
}
|
|
|
|
// InterfaceAddr contains information about a network interface address.
|
|
type InterfaceAddr struct {
|
|
// Family is the address family, a Linux AF_* constant.
|
|
Family uint8
|
|
|
|
// PrefixLen is the address prefix length.
|
|
PrefixLen uint8
|
|
|
|
// Flags is the address flags.
|
|
Flags uint8
|
|
|
|
// Addr is the actual address.
|
|
Addr []byte
|
|
}
|
|
|
|
// TCPBufferSize contains settings controlling TCP buffer sizing.
|
|
//
|
|
// +stateify savable
|
|
type TCPBufferSize struct {
|
|
// Min is the minimum size.
|
|
Min int
|
|
|
|
// Default is the default size.
|
|
Default int
|
|
|
|
// Max is the maximum size.
|
|
Max int
|
|
}
|
|
|
|
// StatDev describes one line of /proc/net/dev, i.e., stats for one network
|
|
// interface.
|
|
type StatDev [16]uint64
|
|
|
|
// Route contains information about a network route.
|
|
type Route struct {
|
|
// Family is the address family, a Linux AF_* constant.
|
|
Family uint8
|
|
|
|
// DstLen is the length of the destination address.
|
|
DstLen uint8
|
|
|
|
// SrcLen is the length of the source address.
|
|
SrcLen uint8
|
|
|
|
// TOS is the Type of Service filter.
|
|
TOS uint8
|
|
|
|
// Table is the routing table ID.
|
|
Table uint8
|
|
|
|
// Protocol is the route origin, a Linux RTPROT_* constant.
|
|
Protocol uint8
|
|
|
|
// Scope is the distance to destination, a Linux RT_SCOPE_* constant.
|
|
Scope uint8
|
|
|
|
// Type is the route origin, a Linux RTN_* constant.
|
|
Type uint8
|
|
|
|
// Flags are route flags. See rtnetlink(7) under "rtm_flags".
|
|
Flags uint32
|
|
|
|
// DstAddr is the route destination address (RTA_DST).
|
|
DstAddr []byte
|
|
|
|
// SrcAddr is the route source address (RTA_SRC).
|
|
SrcAddr []byte
|
|
|
|
// OutputInterface is the output interface index (RTA_OIF).
|
|
OutputInterface int32
|
|
|
|
// GatewayAddr is the route gateway address (RTA_GATEWAY).
|
|
GatewayAddr []byte
|
|
}
|