socket

package
v0.0.0-...-522126a Latest Latest
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 Go to latest Published: Dec 23, 2019 License: Apache-2.0 Imports: 15 Imported by: 0

Documentation

Overview

Package socket provides the interfaces that need to be provided by socket implementations and providers, as well as per family demultiplexing of socket creation.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func GetSockOptEmitUnimplementedEvent 

func GetSockOptEmitUnimplementedEvent(t *kernel.Task, name int)

GetSockOptEmitUnimplementedEvent emits unimplemented event if name is valid. It contains names that are valid for GetSockOpt when level is SOL_SOCKET.

func New 

func New(t *kernel.Task, family int, stype linux.SockType, protocol int) (*fs.File, *syserr.Error)

New creates a new socket with the given family, type and protocol.

func NewDirent 

func NewDirent(ctx context.Context, d *device.Device) *fs.Dirent

NewDirent returns a sockfs fs.Dirent that resides on device d.

func Pair 

func Pair(t *kernel.Task, family int, stype linux.SockType, protocol int) (*fs.File, *fs.File, *syserr.Error)

Pair creates a new connected socket pair with the given family, type and protocol.

func RegisterProvider 

func RegisterProvider(family int, provider Provider)

RegisterProvider registers the provider of a given address family so that sockets of that type can be created via socket() and/or socketpair() syscalls.

func SetSockOptEmitUnimplementedEvent 

func SetSockOptEmitUnimplementedEvent(t *kernel.Task, name int)

SetSockOptEmitUnimplementedEvent emits unimplemented event if name is valid. It contains names that are valid for SetSockOpt when level is SOL_SOCKET.

func UnmarshalSockAddr 

func UnmarshalSockAddr(family int, data []byte) linux.SockAddr

UnmarshalSockAddr unmarshals memory representing a struct sockaddr to one of the ABI socket address types.

Precondition: data must be long enough to represent a socket address of the given family.

Types

type ControlMessages 

type ControlMessages struct {
	Unix transport.ControlMessages
	IP   tcpip.ControlMessages
}

ControlMessages represents the union of unix control messages and tcpip control messages.

func (*ControlMessages) Release 

func (c *ControlMessages) Release()

Release releases Unix domain socket credentials and rights.

type Provider 

type Provider interface {
	// Socket creates a new socket.
	//
	// If a nil Socket _and_ a nil error is returned, it means that the
	// protocol is not supported. A non-nil error should only be returned
	// if the protocol is supported, but an error occurs during creation.
	Socket(t *kernel.Task, stype linux.SockType, protocol int) (*fs.File, *syserr.Error)

	// Pair creates a pair of connected sockets.
	//
	// See Socket for error information.
	Pair(t *kernel.Task, stype linux.SockType, protocol int) (*fs.File, *fs.File, *syserr.Error)
}

Provider is the interface implemented by providers of sockets for specific address families (e.g., AF_INET).

type SendReceiveTimeout 

type SendReceiveTimeout struct {
	// contains filtered or unexported fields
}

SendReceiveTimeout stores timeouts for send and receive calls.

It is meant to be embedded into Socket implementations to help satisfy the interface.

Care must be taken when copying SendReceiveTimeout as it contains atomic variables.

+stateify savable

func (*SendReceiveTimeout) RecvTimeout 

func (to *SendReceiveTimeout) RecvTimeout() int64

RecvTimeout implements Socket.RecvTimeout.

func (*SendReceiveTimeout) SendTimeout 

func (to *SendReceiveTimeout) SendTimeout() int64

SendTimeout implements Socket.SendTimeout.

func (*SendReceiveTimeout) SetRecvTimeout 

func (to *SendReceiveTimeout) SetRecvTimeout(nanoseconds int64)

SetRecvTimeout implements Socket.SetRecvTimeout.

func (*SendReceiveTimeout) SetSendTimeout 

func (to *SendReceiveTimeout) SetSendTimeout(nanoseconds int64)

SetSendTimeout implements Socket.SetSendTimeout.

type Socket 

type Socket interface {
	fs.FileOperations

	// Connect implements the connect(2) linux syscall.
	Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr.Error

	// Accept implements the accept4(2) linux syscall.
	// Returns fd, real peer address length and error. Real peer address
	// length is only set if len(peer) > 0.
	Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, linux.SockAddr, uint32, *syserr.Error)

	// Bind implements the bind(2) linux syscall.
	Bind(t *kernel.Task, sockaddr []byte) *syserr.Error

	// Listen implements the listen(2) linux syscall.
	Listen(t *kernel.Task, backlog int) *syserr.Error

	// Shutdown implements the shutdown(2) linux syscall.
	Shutdown(t *kernel.Task, how int) *syserr.Error

	// GetSockOpt implements the getsockopt(2) linux syscall.
	GetSockOpt(t *kernel.Task, level int, name int, outPtr usermem.Addr, outLen int) (interface{}, *syserr.Error)

	// SetSockOpt implements the setsockopt(2) linux syscall.
	SetSockOpt(t *kernel.Task, level int, name int, opt []byte) *syserr.Error

	// GetSockName implements the getsockname(2) linux syscall.
	//
	// addrLen is the address length to be returned to the application, not
	// necessarily the actual length of the address.
	GetSockName(t *kernel.Task) (addr linux.SockAddr, addrLen uint32, err *syserr.Error)

	// GetPeerName implements the getpeername(2) linux syscall.
	//
	// addrLen is the address length to be returned to the application, not
	// necessarily the actual length of the address.
	GetPeerName(t *kernel.Task) (addr linux.SockAddr, addrLen uint32, err *syserr.Error)

	// RecvMsg implements the recvmsg(2) linux syscall.
	//
	// senderAddrLen is the address length to be returned to the application,
	// not necessarily the actual length of the address.
	//
	// flags control how RecvMsg should be completed. msgFlags indicate how
	// the RecvMsg call was completed. Note that control message truncation
	// may still be required even if the MSG_CTRUNC bit is not set in
	// msgFlags. In that case, the caller should set MSG_CTRUNC appropriately.
	//
	// If err != nil, the recv was not successful.
	RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlDataLen uint64) (n int, msgFlags int, senderAddr linux.SockAddr, senderAddrLen uint32, controlMessages ControlMessages, err *syserr.Error)

	// SendMsg implements the sendmsg(2) linux syscall. SendMsg does not take
	// ownership of the ControlMessage on error.
	//
	// If n > 0, err will either be nil or an error from t.Block.
	SendMsg(t *kernel.Task, src usermem.IOSequence, to []byte, flags int, haveDeadline bool, deadline ktime.Time, controlMessages ControlMessages) (n int, err *syserr.Error)

	// SetRecvTimeout sets the timeout (in ns) for recv operations. Zero means
	// no timeout, and negative means DONTWAIT.
	SetRecvTimeout(nanoseconds int64)

	// RecvTimeout gets the current timeout (in ns) for recv operations. Zero
	// means no timeout, and negative means DONTWAIT.
	RecvTimeout() int64

	// SetSendTimeout sets the timeout (in ns) for send operations. Zero means
	// no timeout, and negative means DONTWAIT.
	SetSendTimeout(nanoseconds int64)

	// SendTimeout gets the current timeout (in ns) for send operations. Zero
	// means no timeout, and negative means DONTWAIT.
	SendTimeout() int64

	// State returns the current state of the socket, as represented by Linux in
	// procfs. The returned state value is protocol-specific.
	State() uint32

	// Type returns the family, socket type and protocol of the socket.
	Type() (family int, skType linux.SockType, protocol int)
}

Socket is the interface containing socket syscalls used by the syscall layer to redirect them to the appropriate implementation.

Source Files

View all Source files

Directories

Path Synopsis
Package control provides internal representations of socket control messages.
 Package control provides internal representations of socket control messages.
Package hostinet implements AF_INET and AF_INET6 sockets using the host's network stack.
 Package hostinet implements AF_INET and AF_INET6 sockets using the host's network stack.
Package netfilter helps the sentry interact with netstack's netfilter capabilities.
 Package netfilter helps the sentry interact with netstack's netfilter capabilities.
Package netlink provides core functionality for netlink sockets.
 Package netlink provides core functionality for netlink sockets.
port
Package port provides port ID allocation for netlink sockets.
 Package port provides port ID allocation for netlink sockets.
route
Package route provides a NETLINK_ROUTE socket protocol.
 Package route provides a NETLINK_ROUTE socket protocol.
uevent
Package uevent provides a NETLINK_KOBJECT_UEVENT socket protocol.
 Package uevent provides a NETLINK_KOBJECT_UEVENT socket protocol.
Package netstack provides an implementation of the socket.Socket interface that is backed by a tcpip.Endpoint.
 Package netstack provides an implementation of the socket.Socket interface that is backed by a tcpip.Endpoint.
Package rpcinet implements sockets using an RPC for each syscall.
 Package rpcinet implements sockets using an RPC for each syscall.
conn
Package conn is an RPC connection to a syscall RPC server.
 Package conn is an RPC connection to a syscall RPC server.
notifier
Package notifier implements an FD notifier implementation over RPC.
 Package notifier implements an FD notifier implementation over RPC.
Package unix provides an implementation of the socket.Socket interface for the AF_UNIX protocol family.
 Package unix provides an implementation of the socket.Socket interface for the AF_UNIX protocol family.
transport
Package transport contains the implementation of Unix endpoints.
 Package transport contains the implementation of Unix endpoints.

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