rawfile

package
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Published: Dec 23, 2019 License: Apache-2.0 Imports: 4 Imported by: 0

Documentation

Overview

Package rawfile contains utilities for using the netstack with raw host files on Linux hosts.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func BlockingRead

func BlockingRead(fd int, b []byte) (int, *tcpip.Error)

BlockingRead reads from a file descriptor that is set up as non-blocking. If no data is available, it will block in a poll() syscall until the file descriptor becomes readable.

func BlockingReadv

func BlockingReadv(fd int, iovecs []syscall.Iovec) (int, *tcpip.Error)

BlockingReadv reads from a file descriptor that is set up as non-blocking and stores the data in a list of iovecs buffers. If no data is available, it will block in a poll() syscall until the file descriptor becomes readable.

func BlockingRecvMMsg

func BlockingRecvMMsg(fd int, msgHdrs []MMsgHdr) (int, *tcpip.Error)

BlockingRecvMMsg reads from a file descriptor that is set up as non-blocking and stores the received messages in a slice of MMsgHdr structures. If no data is available, it will block in a poll() syscall until the file descriptor becomes readable.

func GetMTU

func GetMTU(name string) (uint32, error)

GetMTU determines the MTU of a network interface device.

func NonBlockingSendMMsg

func NonBlockingSendMMsg(fd int, msgHdrs []MMsgHdr) (int, *tcpip.Error)

NonBlockingSendMMsg sends multiple messages on a socket.

func NonBlockingWrite

func NonBlockingWrite(fd int, buf []byte) *tcpip.Error

NonBlockingWrite writes the given buffer to a file descriptor. It fails if partial data is written.

func NonBlockingWrite3

func NonBlockingWrite3(fd int, b1, b2, b3 []byte) *tcpip.Error

NonBlockingWrite3 writes up to three byte slices to a file descriptor in a single syscall. It fails if partial data is written.

func TranslateErrno

func TranslateErrno(e syscall.Errno) *tcpip.Error

TranslateErrno translate an errno from the syscall package into a *tcpip.Error.

Valid, but unrecognized errnos will be translated to tcpip.ErrInvalidEndpointState (EINVAL). Panics on invalid errnos.

Types

type MMsgHdr

type MMsgHdr struct {
	Msg syscall.Msghdr
	Len uint32
	// contains filtered or unexported fields
}

MMsgHdr represents the mmsg_hdr structure required by recvmmsg() on linux.

type PollEvent

type PollEvent struct {
	FD      int32
	Events  int16
	Revents int16
}

PollEvent represents the pollfd structure passed to a poll() system call.

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