289b30715d
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
118 lines
2.7 KiB
Go
118 lines
2.7 KiB
Go
// Copyright 2011 Google Inc. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package uuid
|
|
|
|
import (
|
|
"net"
|
|
"sync"
|
|
)
|
|
|
|
var (
|
|
nodeMu sync.Mutex
|
|
interfaces []net.Interface // cached list of interfaces
|
|
ifname string // name of interface being used
|
|
nodeID []byte // hardware for version 1 UUIDs
|
|
)
|
|
|
|
// NodeInterface returns the name of the interface from which the NodeID was
|
|
// derived. The interface "user" is returned if the NodeID was set by
|
|
// SetNodeID.
|
|
func NodeInterface() string {
|
|
defer nodeMu.Unlock()
|
|
nodeMu.Lock()
|
|
return ifname
|
|
}
|
|
|
|
// SetNodeInterface selects the hardware address to be used for Version 1 UUIDs.
|
|
// If name is "" then the first usable interface found will be used or a random
|
|
// Node ID will be generated. If a named interface cannot be found then false
|
|
// is returned.
|
|
//
|
|
// SetNodeInterface never fails when name is "".
|
|
func SetNodeInterface(name string) bool {
|
|
defer nodeMu.Unlock()
|
|
nodeMu.Lock()
|
|
return setNodeInterface(name)
|
|
}
|
|
|
|
func setNodeInterface(name string) bool {
|
|
if interfaces == nil {
|
|
var err error
|
|
interfaces, err = net.Interfaces()
|
|
if err != nil && name != "" {
|
|
return false
|
|
}
|
|
}
|
|
|
|
for _, ifs := range interfaces {
|
|
if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
|
|
if setNodeID(ifs.HardwareAddr) {
|
|
ifname = ifs.Name
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
// We found no interfaces with a valid hardware address. If name
|
|
// does not specify a specific interface generate a random Node ID
|
|
// (section 4.1.6)
|
|
if name == "" {
|
|
if nodeID == nil {
|
|
nodeID = make([]byte, 6)
|
|
}
|
|
randomBits(nodeID)
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// NodeID returns a slice of a copy of the current Node ID, setting the Node ID
|
|
// if not already set.
|
|
func NodeID() []byte {
|
|
defer nodeMu.Unlock()
|
|
nodeMu.Lock()
|
|
if nodeID == nil {
|
|
setNodeInterface("")
|
|
}
|
|
nid := make([]byte, 6)
|
|
copy(nid, nodeID)
|
|
return nid
|
|
}
|
|
|
|
// SetNodeID sets the Node ID to be used for Version 1 UUIDs. The first 6 bytes
|
|
// of id are used. If id is less than 6 bytes then false is returned and the
|
|
// Node ID is not set.
|
|
func SetNodeID(id []byte) bool {
|
|
defer nodeMu.Unlock()
|
|
nodeMu.Lock()
|
|
if setNodeID(id) {
|
|
ifname = "user"
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func setNodeID(id []byte) bool {
|
|
if len(id) < 6 {
|
|
return false
|
|
}
|
|
if nodeID == nil {
|
|
nodeID = make([]byte, 6)
|
|
}
|
|
copy(nodeID, id)
|
|
return true
|
|
}
|
|
|
|
// NodeID returns the 6 byte node id encoded in uuid. It returns nil if uuid is
|
|
// not valid. The NodeID is only well defined for version 1 and 2 UUIDs.
|
|
func (uuid UUID) NodeID() []byte {
|
|
if len(uuid) != 16 {
|
|
return nil
|
|
}
|
|
node := make([]byte, 6)
|
|
copy(node, uuid[10:])
|
|
return node
|
|
}
|