ducky/devices
ducky/devices/vendor/github.com/pborman/uuid/node.go
Validate device creation. Update our uuid package to the latest, which is now based on the GitHub fork instead of the Google Code. Also, update our api package to its latest version, which now needs the pqarrays package as a dependency. We fleshed out the validateDeviceCreation. We now pass in the scopes we have (for broad access control) and the user ID (for fine-grained access control). This helper returns the first error it encounters, though it should probably return a slice so we can return multiple errors all at once. Before we even decode the request to create a Device, let's check if the user is even logged in. If we can't ascertain that or they're not, there's no point in even consuming the memory necessary to read the request, because we know we're not going to use it anyways. Finally actually validate the devices we're creating, and return an appropriate error for each error we can get. Also, the api.CheckScopes helper function now takes the scopes passed in as a string slice, and we have an api.GetScopes helper function to retrieve the scopes associated with the request. Let's not keep parsing that. We need two new scopes to control access for device creation; ScopeImport lets users import devices in and is pretty much admin access. ScopeCreateOtherUserDevices allows a user to create Devices that are owned by another user.
| paddy@0 | 1 // Copyright 2011 Google Inc. All rights reserved. |
| paddy@0 | 2 // Use of this source code is governed by a BSD-style |
| paddy@0 | 3 // license that can be found in the LICENSE file. |
| paddy@0 | 4 |
| paddy@0 | 5 package uuid |
| paddy@0 | 6 |
| paddy@0 | 7 import "net" |
| paddy@0 | 8 |
| paddy@0 | 9 var ( |
| paddy@0 | 10 interfaces []net.Interface // cached list of interfaces |
| paddy@0 | 11 ifname string // name of interface being used |
| paddy@0 | 12 nodeID []byte // hardware for version 1 UUIDs |
| paddy@0 | 13 ) |
| paddy@0 | 14 |
| paddy@0 | 15 // NodeInterface returns the name of the interface from which the NodeID was |
| paddy@0 | 16 // derived. The interface "user" is returned if the NodeID was set by |
| paddy@0 | 17 // SetNodeID. |
| paddy@0 | 18 func NodeInterface() string { |
| paddy@0 | 19 return ifname |
| paddy@0 | 20 } |
| paddy@0 | 21 |
| paddy@0 | 22 // SetNodeInterface selects the hardware address to be used for Version 1 UUIDs. |
| paddy@0 | 23 // If name is "" then the first usable interface found will be used or a random |
| paddy@0 | 24 // Node ID will be generated. If a named interface cannot be found then false |
| paddy@0 | 25 // is returned. |
| paddy@0 | 26 // |
| paddy@0 | 27 // SetNodeInterface never fails when name is "". |
| paddy@0 | 28 func SetNodeInterface(name string) bool { |
| paddy@0 | 29 if interfaces == nil { |
| paddy@0 | 30 var err error |
| paddy@0 | 31 interfaces, err = net.Interfaces() |
| paddy@0 | 32 if err != nil && name != "" { |
| paddy@0 | 33 return false |
| paddy@0 | 34 } |
| paddy@0 | 35 } |
| paddy@0 | 36 |
| paddy@0 | 37 for _, ifs := range interfaces { |
| paddy@0 | 38 if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) { |
| paddy@0 | 39 if setNodeID(ifs.HardwareAddr) { |
| paddy@0 | 40 ifname = ifs.Name |
| paddy@0 | 41 return true |
| paddy@0 | 42 } |
| paddy@0 | 43 } |
| paddy@0 | 44 } |
| paddy@0 | 45 |
| paddy@0 | 46 // We found no interfaces with a valid hardware address. If name |
| paddy@0 | 47 // does not specify a specific interface generate a random Node ID |
| paddy@0 | 48 // (section 4.1.6) |
| paddy@0 | 49 if name == "" { |
| paddy@0 | 50 if nodeID == nil { |
| paddy@0 | 51 nodeID = make([]byte, 6) |
| paddy@0 | 52 } |
| paddy@0 | 53 randomBits(nodeID) |
| paddy@0 | 54 return true |
| paddy@0 | 55 } |
| paddy@0 | 56 return false |
| paddy@0 | 57 } |
| paddy@0 | 58 |
| paddy@0 | 59 // NodeID returns a slice of a copy of the current Node ID, setting the Node ID |
| paddy@0 | 60 // if not already set. |
| paddy@0 | 61 func NodeID() []byte { |
| paddy@0 | 62 if nodeID == nil { |
| paddy@0 | 63 SetNodeInterface("") |
| paddy@0 | 64 } |
| paddy@0 | 65 nid := make([]byte, 6) |
| paddy@0 | 66 copy(nid, nodeID) |
| paddy@0 | 67 return nid |
| paddy@0 | 68 } |
| paddy@0 | 69 |
| paddy@0 | 70 // SetNodeID sets the Node ID to be used for Version 1 UUIDs. The first 6 bytes |
| paddy@0 | 71 // of id are used. If id is less than 6 bytes then false is returned and the |
| paddy@0 | 72 // Node ID is not set. |
| paddy@0 | 73 func SetNodeID(id []byte) bool { |
| paddy@0 | 74 if setNodeID(id) { |
| paddy@0 | 75 ifname = "user" |
| paddy@0 | 76 return true |
| paddy@0 | 77 } |
| paddy@0 | 78 return false |
| paddy@0 | 79 } |
| paddy@0 | 80 |
| paddy@0 | 81 func setNodeID(id []byte) bool { |
| paddy@0 | 82 if len(id) < 6 { |
| paddy@0 | 83 return false |
| paddy@0 | 84 } |
| paddy@0 | 85 if nodeID == nil { |
| paddy@0 | 86 nodeID = make([]byte, 6) |
| paddy@0 | 87 } |
| paddy@0 | 88 copy(nodeID, id) |
| paddy@0 | 89 return true |
| paddy@0 | 90 } |
| paddy@0 | 91 |
| paddy@0 | 92 // NodeID returns the 6 byte node id encoded in uuid. It returns nil if uuid is |
| paddy@0 | 93 // not valid. The NodeID is only well defined for version 1 and 2 UUIDs. |
| paddy@0 | 94 func (uuid UUID) NodeID() []byte { |
| paddy@0 | 95 if len(uuid) != 16 { |
| paddy@0 | 96 return nil |
| paddy@0 | 97 } |
| paddy@0 | 98 node := make([]byte, 6) |
| paddy@0 | 99 copy(node, uuid[10:]) |
| paddy@0 | 100 return node |
| paddy@0 | 101 } |