diff options
Diffstat (limited to 'vendor/golang.org/x/net/ipv4/payload_cmsg.go')
-rw-r--r-- | vendor/golang.org/x/net/ipv4/payload_cmsg.go | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/ipv4/payload_cmsg.go b/vendor/golang.org/x/net/ipv4/payload_cmsg.go new file mode 100644 index 0000000..3f06d76 --- /dev/null +++ b/vendor/golang.org/x/net/ipv4/payload_cmsg.go @@ -0,0 +1,36 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !nacl,!plan9,!windows + +package ipv4 + +import ( + "net" + "syscall" +) + +// ReadFrom reads a payload of the received IPv4 datagram, from the +// endpoint c, copying the payload into b. It returns the number of +// bytes copied into b, the control message cm and the source address +// src of the received datagram. +func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) { + if !c.ok() { + return 0, nil, nil, syscall.EINVAL + } + return c.readFrom(b) +} + +// WriteTo writes a payload of the IPv4 datagram, to the destination +// address dst through the endpoint c, copying the payload from b. It +// returns the number of bytes written. The control message cm allows +// the datagram path and the outgoing interface to be specified. +// Currently only Darwin and Linux support this. The cm may be nil if +// control of the outgoing datagram is not required. +func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) { + if !c.ok() { + return 0, syscall.EINVAL + } + return c.writeTo(b, cm, dst) +} |