435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
71 lines
2.4 KiB
Go
71 lines
2.4 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
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package ipv6
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import (
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"net"
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"golang.org/x/net/internal/socket"
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)
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// ReadFrom reads a payload of the received IPv6 datagram, from the
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// endpoint c, copying the payload into b. It returns the number of
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// bytes copied into b, the control message cm and the source address
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// src of the received datagram.
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func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
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if !c.ok() {
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return 0, nil, nil, errInvalidConn
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}
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c.rawOpt.RLock()
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m := socket.Message{
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Buffers: [][]byte{b},
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OOB: NewControlMessage(c.rawOpt.cflags),
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}
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c.rawOpt.RUnlock()
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switch c.PacketConn.(type) {
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case *net.UDPConn:
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if err := c.RecvMsg(&m, 0); err != nil {
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return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
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}
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case *net.IPConn:
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if err := c.RecvMsg(&m, 0); err != nil {
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return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
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}
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default:
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return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errInvalidConnType}
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}
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if m.NN > 0 {
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cm = new(ControlMessage)
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if err := cm.Parse(m.OOB[:m.NN]); err != nil {
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return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
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}
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cm.Src = netAddrToIP16(m.Addr)
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}
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return m.N, cm, m.Addr, nil
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}
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// WriteTo writes a payload of the IPv6 datagram, to the destination
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// address dst through the endpoint c, copying the payload from b. It
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// returns the number of bytes written. The control message cm allows
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// the IPv6 header fields and the datagram path to be specified. The
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// cm may be nil if control of the outgoing datagram is not required.
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func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
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if !c.ok() {
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return 0, errInvalidConn
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}
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m := socket.Message{
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Buffers: [][]byte{b},
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OOB: cm.Marshal(),
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Addr: dst,
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}
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err = c.SendMsg(&m, 0)
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if err != nil {
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err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Addr: opAddr(dst), Err: err}
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}
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return m.N, err
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}
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