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linux: Refactors Owner/Group to DevicePermissions

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This commit is contained in:
Matthew Ellison 2017-05-23 14:58:32 -04:00
parent 15d1b3ddbb
commit 937f6ba955
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GPG key ID: A815A44BDC8DD409
2 changed files with 24 additions and 20 deletions
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30
params_linux.go
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@ -2,6 +2,18 @@
package water
type DevicePermissions struct {
// ID of the user which will be granted ownership of the device.
// If set to a negative value, the owner value will not be changed.
// By default, Linux sets the owner to -1, which allows any user.
Owner uint
// ID of the group which will be granted access to the device.
// If set to a negative value, the group value will not be changed.
// By default, Linux sets the group to -1, which allows any group.
Group uint
}
// PlatformSpecificParams defines parameters in Config that are specific to
// Linux. A zero-value of such type is valid, yielding an interface
// with OS defined name.
@ -15,20 +27,12 @@ type PlatformSpecificParams struct {
// Enable or disable persistence mode for the interface device.
Persist bool
// ID of the user which will be granted ownership of the device.
// If set to a negative value, the owner value will not be changed.
// By default, Linux sets the owner to -1, which allows any user.
Owner int
// ID of the group which will be granted access to the device.
// If set to a negative value, the group value will not be changed.
// By default, Linux sets the group to -1, which allows any group.
Group int
// Owner and Group permissions for the device.
// A zero-value of this field, i.e. nil, indicates that no changes to owner
// or group will be made.
Permissions *DevicePermissions
}
func defaultPlatformSpecificParams() PlatformSpecificParams {
return PlatformSpecificParams{
Owner: -1,
Group: -1,
}
return PlatformSpecificParams{}
}

14
syscalls_linux.go
View file

@ -81,16 +81,16 @@ func createInterface(fd uintptr, ifName string, flags uint16) (createdIFName str
func setDeviceOptions(fd uintptr, config Config) (err error) {
// Set Device Owner
if config.Owner >= 0 {
if err = ioctl(fd, syscall.TUNSETOWNER, uintptr(config.Owner)); err != nil {
// Device Permissions
if config.Permissions != nil {
// Set Owner
if err = ioctl(fd, syscall.TUNSETOWNER, uintptr(config.Permissions.Owner)); err != nil {
return
}
}
// Set Device Group
if config.Group >= 0 {
if err = ioctl(fd, syscall.TUNSETGROUP, uintptr(config.Group)); err != nil {
// Set Group
if err = ioctl(fd, syscall.TUNSETGROUP, uintptr(config.Permissions.Group)); err != nil {
return
}
}