network

package
v0.0.0-...-51844b1 Latest Latest
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 Go to latest Published: Mar 2, 2021 License: Apache-2.0 Imports: 51 Imported by: 0

Documentation

Overview

Example (IpRangesOverlap) 
rangePairs := [][2]string{
	{"10.1.1.1-10.1.1.2", "10.1.1.3-10.1.1.4"},
	{"10.1.1.1-10.1.2.1", "10.1.1.254-10.1.1.255"},
	{"10.1.1.1-10.1.1.6", "10.1.1.5-10.1.1.9"},
	{"10.1.1.5-10.1.1.9", "10.1.1.1-10.1.1.6"},
	{"::1-::2", "::3-::4"},
	{"::1-::6", "::5-::9"},
	{"::5-::9", "::1-::6"},
}

for _, pair := range rangePairs {
	r0, _ := parseIPRange(pair[0])
	r1, _ := parseIPRange(pair[1])
	result := IPRangesOverlap(r0, r1)
	fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", r0, r1, result)
}

// also do a couple of tests with ranges that have no end
singleIPRange := &shared.IPRange{
	Start: net.ParseIP("10.1.1.4"),
}
otherRange, _ := parseIPRange("10.1.1.1-10.1.1.6")

fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, otherRange, IPRangesOverlap(singleIPRange, otherRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", otherRange, singleIPRange, IPRangesOverlap(otherRange, singleIPRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, singleIPRange, IPRangesOverlap(singleIPRange, singleIPRange))

otherRange, _ = parseIPRange("10.1.1.8-10.1.1.9")

fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, otherRange, IPRangesOverlap(singleIPRange, otherRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", otherRange, singleIPRange, IPRangesOverlap(otherRange, singleIPRange))

Output:

Range1: 10.1.1.1-10.1.1.2, Range2: 10.1.1.3-10.1.1.4, overlapped: false
Range1: 10.1.1.1-10.1.2.1, Range2: 10.1.1.254-10.1.1.255, overlapped: true
Range1: 10.1.1.1-10.1.1.6, Range2: 10.1.1.5-10.1.1.9, overlapped: true
Range1: 10.1.1.5-10.1.1.9, Range2: 10.1.1.1-10.1.1.6, overlapped: true
Range1: ::1-::2, Range2: ::3-::4, overlapped: false
Range1: ::1-::6, Range2: ::5-::9, overlapped: true
Range1: ::5-::9, Range2: ::1-::6, overlapped: true
Range1: 10.1.1.4, Range2: 10.1.1.1-10.1.1.6, overlapped: true
Range1: 10.1.1.1-10.1.1.6, Range2: 10.1.1.4, overlapped: true
Range1: 10.1.1.4, Range2: 10.1.1.4, overlapped: true
Range1: 10.1.1.4, Range2: 10.1.1.8-10.1.1.9, overlapped: false
Range1: 10.1.1.8-10.1.1.9, Range2: 10.1.1.4, overlapped: false
Example (ParseIPRange) 
_, allowedv4NetworkA, _ := net.ParseCIDR("192.168.1.0/24")
_, allowedv4NetworkB, _ := net.ParseCIDR("192.168.0.0/16")
_, allowedv6NetworkA, _ := net.ParseCIDR("fd22:c952:653e:3df6::/64")
_, allowedv6NetworkB, _ := net.ParseCIDR("fd22:c952:653e::/48")

ipRanges := []string{
	// Ranges within allowedv4NetworkA.
	"192.168.1.1-192.168.1.255",
	"0.0.0.1-192.168.1.255",
	"0.0.0.1-0.0.0.255",
	// Ranges outsde of allowedv4NetworkA but within allowedv4NetworkB.
	"192.168.0.1-192.168.0.255",
	"192.168.0.0-192.168.0.0",
	"0.0.2.0-0.0.2.255",
	// Invalid IP ranges.
	"0.0.0.0.1-192.168.1.255",
	"192.0.0.1-192.0.0.255",
	"0.0.0.1-01.0.0.255",
	"0.0.2.1-0.0.0.255",
	// Ranges within allowedv6NetworkA.
	"fd22:c952:653e:3df6::1-fd22:c952:653e:3df6::FFFF",
	"::1-::FFFF",
	// Ranges outsde of allowedv6NetworkA but within allowedv6NetworkB.
	"fd22:c952:653e:FFFF::1-fd22:c952:653e:FFFF::FFFF",
	"::AAAA:FFFF:FFFF:FFFF:1-::AAAA:FFFF:FFFF:FFFF:FFFF",
}

fmt.Println("With allowed networks")
for _, ipRange := range ipRanges {
	parsedRange, err := parseIPRange(ipRange, allowedv4NetworkA, allowedv4NetworkB, allowedv6NetworkA, allowedv6NetworkB)
	if err != nil {
		fmt.Printf("Err: %v\n", err)
		continue
	}

	fmt.Printf("Start: %s, End: %s\n", parsedRange.Start.String(), parsedRange.End.String())
}

fmt.Println("Without allowed networks")
for _, ipRange := range ipRanges {
	parsedRange, err := parseIPRange(ipRange)
	if err != nil {
		fmt.Printf("Err: %v\n", err)
		continue
	}

	fmt.Printf("Start: %s, End: %s\n", parsedRange.Start.String(), parsedRange.End.String())
}

Output:

With allowed networks
Start: 192.168.1.1, End: 192.168.1.255
Start: 192.168.1.1, End: 192.168.1.255
Start: 192.168.1.1, End: 192.168.1.255
Start: 192.168.0.1, End: 192.168.0.255
Start: 192.168.0.0, End: 192.168.0.0
Start: 192.168.2.0, End: 192.168.2.255
Err: Start IP "0.0.0.0.1" is invalid
Err: IP range "192.0.0.1-192.0.0.255" does not fall within any of the allowed networks [192.168.1.0/24 192.168.0.0/16 fd22:c952:653e:3df6::/64 fd22:c952:653e::/48]
Err: IP range "0.0.0.1-01.0.0.255" does not fall within any of the allowed networks [192.168.1.0/24 192.168.0.0/16 fd22:c952:653e:3df6::/64 fd22:c952:653e::/48]
Err: Start IP "0.0.2.1" must be less than End IP "0.0.0.255"
Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
Start: fd22:c952:653e:ffff::1, End: fd22:c952:653e:ffff::ffff
Start: fd22:c952:653e:aaaa:ffff:ffff:ffff:1, End: fd22:c952:653e:aaaa:ffff:ffff:ffff:ffff
Without allowed networks
Start: 192.168.1.1, End: 192.168.1.255
Start: 0.0.0.1, End: 192.168.1.255
Start: 0.0.0.1, End: 0.0.0.255
Start: 192.168.0.1, End: 192.168.0.255
Start: 192.168.0.0, End: 192.168.0.0
Start: 0.0.2.0, End: 0.0.2.255
Err: Start IP "0.0.0.0.1" is invalid
Start: 192.0.0.1, End: 192.0.0.255
Start: 0.0.0.1, End: 1.0.0.255
Err: Start IP "0.0.2.1" must be less than End IP "0.0.0.255"
Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
Start: ::1, End: ::ffff
Start: fd22:c952:653e:ffff::1, End: fd22:c952:653e:ffff::ffff
Start: ::aaaa:ffff:ffff:ffff:1, End: ::aaaa:ffff:ffff:ffff:ffff

Index

Examples

Constants

View Source 
const ForkdnsServersListFile = "servers.conf"

ForkdnsServersListFile file that contains the server candidates list.

View Source 
const ForkdnsServersListPath = "forkdns.servers"

ForkdnsServersListPath defines the path that contains the forkdns server candidate file.

Variables

View Source 
var ErrUnknownDriver = fmt.Errorf("Unknown driver")

ErrUnknownDriver is the "Unknown driver" error

Functions

func AttachInterface 

func AttachInterface(bridgeName string, devName string) error

AttachInterface attaches an interface to a bridge.

func BridgeVLANDefaultPVID 

func BridgeVLANDefaultPVID(interfaceName string) (string, error)

BridgeVLANDefaultPVID returns the VLAN default port VLAN ID (PVID).

func BridgeVLANFilterSetStatus 

func BridgeVLANFilterSetStatus(interfaceName string, status string) error

BridgeVLANFilterSetStatus sets the status of VLAN filtering on a bridge interface.

func BridgeVLANFilteringStatus 

func BridgeVLANFilteringStatus(interfaceName string) (string, error)

BridgeVLANFilteringStatus returns whether VLAN filtering is enabled on a bridge interface.

func BridgeVLANSetDefaultPVID 

func BridgeVLANSetDefaultPVID(interfaceName string, vlanID string) error

BridgeVLANSetDefaultPVID sets the VLAN default port VLAN ID (PVID).

func DefaultGatewaySubnetV4 

func DefaultGatewaySubnetV4() (*net.IPNet, string, error)

DefaultGatewaySubnetV4 returns subnet of default gateway interface.

func DetachInterface 

func DetachInterface(bridgeName string, devName string) error

DetachInterface detaches an interface from a bridge.

func ForkdnsServersList 

func ForkdnsServersList(networkName string) ([]string, error)

ForkdnsServersList reads the server list file and returns the list as a slice.

func GetDevMTU 

func GetDevMTU(devName string) (uint32, error)

GetDevMTU retrieves the current MTU setting for a named network device.

func GetHostDevice 

func GetHostDevice(parent string, vlan string) string

GetHostDevice returns the interface name to use for a combination of parent device name and VLAN ID. If no vlan ID supplied, parent name is returned unmodified. If non-empty VLAN ID is supplied then it will look for an existing VLAN device and return that, otherwise it will return the default "parent.vlan" format as name.

func GetLeaseAddresses 

func GetLeaseAddresses(networkName string, hwaddr string) ([]net.IP, error)

GetLeaseAddresses returns the lease addresses for a network and hwaddr.

func GetMACSlice 

func GetMACSlice(hwaddr string) []string

GetMACSlice parses MAC address.

func GetNeighbourIPs 

func GetNeighbourIPs(interfaceName string, hwaddr string) ([]net.IP, error)

GetNeighbourIPs returns the IP addresses in the neighbour cache for a particular interface and MAC.

func IPRangesOverlap 

func IPRangesOverlap(r1, r2 *shared.IPRange) bool

IPRangesOverlap checks whether two ip ranges have ip addresses in common

func InterfaceBindWait 

func InterfaceBindWait(ifName string) error

InterfaceBindWait waits for network interface to appear after being bound to a driver.

func InterfaceExists 

func InterfaceExists(nic string) bool

InterfaceExists returns true if network interface exists.

func InterfaceRemove 

func InterfaceRemove(nic string) error

InterfaceRemove removes a network interface by name.

func InterfaceSetMTU 

func InterfaceSetMTU(nic string, mtu string) error

InterfaceSetMTU sets the MTU of a network interface.

func IsNativeBridge 

func IsNativeBridge(bridgeName string) bool

IsNativeBridge returns whether the bridge name specified is a Linux native bridge.

func RandomDevName 

func RandomDevName(prefix string) string

RandomDevName returns a random device name with prefix. If the random string combined with the prefix exceeds 13 characters then empty string is returned. This is to ensure we support buggy dhclient applications: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=858580

func SRIOVFindFreeVirtualFunction 

func SRIOVFindFreeVirtualFunction(s *state.State, parentDev string) (string, int, error)

SRIOVFindFreeVirtualFunction looks on the specified parent device for an unused virtual function. Returns the name of the interface and virtual function index ID if found, error if not.

func SRIOVGetHostDevicesInUse 

func SRIOVGetHostDevicesInUse(s *state.State) (map[string]struct{}, error)

SRIOVGetHostDevicesInUse returns a map of host device names that have been used by devices in other instances and networks on the local node. Used when selecting physical and SR-IOV VF devices to avoid conflicts.

func SRIOVGetVFDevicePCISlot 

func SRIOVGetVFDevicePCISlot(parentDev string, vfID string) (pci.Device, error)

SRIOVGetVFDevicePCISlot returns the PCI slot name for a network virtual function device.

func SubnetContains 

func SubnetContains(outerSubnet *net.IPNet, innerSubnet *net.IPNet) bool

SubnetContains returns true if outerSubnet contains innerSubnet.

func SubnetIterate 

func SubnetIterate(subnet *net.IPNet, ipFunc func(ip net.IP) error) error

SubnetIterate iterates through each IP in a subnet calling a function for each IP. If the ipFunc returns a non-nil error then the iteration stops and the error is returned.

func SubnetParseAppend 

func SubnetParseAppend(subnets []*net.IPNet, parseSubnet ...string) ([]*net.IPNet, error)

SubnetParseAppend parses one or more string CIDR subnets. Appends to the supplied slice. Returns subnets slice.

func UpdateDNSMasqStatic 

func UpdateDNSMasqStatic(s *state.State, networkName string) error

UpdateDNSMasqStatic rebuilds the DNSMasq static allocations.

func UsedBy 

func UsedBy(s *state.State, networkProjectName string, networkName string, firstOnly bool) ([]string, error)

UsedBy returns list of API resources using network. Accepts firstOnly argument to indicate that only the first resource using network should be returned. This can help to quickly check if the network is in use.

func VLANInterfaceCreate 

func VLANInterfaceCreate(parent string, vlanDevice string, vlanID string, gvrp bool) (bool, error)

VLANInterfaceCreate creates a VLAN interface on parent interface (if needed). Returns boolean indicating if VLAN interface was created.

Types

type Info 

type Info struct {
	Projects           bool // Indicates if driver can be used in network enabled projects.
	NodeSpecificConfig bool // Whether driver has cluster node specific config as a prerequisite for creation.
}

Info represents information about a network driver.

type Network 

type Network interface {
	Type

	// Config.
	Validate(config map[string]string) error
	ID() int64
	Name() string
	Project() string
	Description() string
	Status() string
	LocalStatus() string
	Config() map[string]string
	IsUsed() (bool, error)
	IsManaged() bool
	DHCPv4Subnet() *net.IPNet
	DHCPv6Subnet() *net.IPNet
	DHCPv4Ranges() []shared.IPRange
	DHCPv6Ranges() []shared.IPRange

	// Actions.
	Create(clientType request.ClientType) error
	Start() error
	Stop() error
	Rename(name string) error
	Update(newNetwork api.NetworkPut, targetNode string, clientType request.ClientType) error
	HandleHeartbeat(heartbeatData *cluster.APIHeartbeat) error
	Delete(clientType request.ClientType) error
	// contains filtered or unexported methods
}

Network represents an instantiated LXD network.

func LoadByName 

func LoadByName(s *state.State, projectName string, name string) (Network, error)

LoadByName loads an instantiated network from the database by project and name.

type OVNInstanceNICOpts 

type OVNInstanceNICOpts struct {
	InstanceUUID   string
	DeviceName     string
	InternalRoutes []*net.IPNet
	ExternalRoutes []*net.IPNet
}

OVNInstanceNICOpts options for starting and stopping an OVN Instance NIC.

type OVNInstanceNICSetupOpts 

type OVNInstanceNICSetupOpts struct {
	OVNInstanceNICOpts

	UplinkConfig       map[string]string
	DNSName            string
	MAC                net.HardwareAddr
	IPs                []net.IP
	SecurityACLs       []string
	SecurityACLsRemove []string
}

OVNInstanceNICSetupOpts options for starting an OVN Instance NIC.

type Type 

type Type interface {
	FillConfig(config map[string]string) error
	Info() Info
	ValidateName(name string) error
	Type() string
	DBType() db.NetworkType
}

Type represents a LXD network driver type.

func LoadByType 

func LoadByType(driverType string) (Type, error)

LoadByType loads a network by driver type.

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