/usr/share/gocode/src/github.com/docker/libnetwork/drivers/solaris/bridge/bridge.go is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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package bridge
import (
"bufio"
"errors"
"fmt"
"net"
"os"
"os/exec"
"strconv"
"strings"
"sync"
"github.com/Sirupsen/logrus"
"github.com/docker/libnetwork/datastore"
"github.com/docker/libnetwork/discoverapi"
"github.com/docker/libnetwork/driverapi"
"github.com/docker/libnetwork/iptables"
"github.com/docker/libnetwork/netlabel"
"github.com/docker/libnetwork/netutils"
"github.com/docker/libnetwork/options"
"github.com/docker/libnetwork/portmapper"
"github.com/docker/libnetwork/types"
)
const (
networkType = "bridge"
// DefaultBridgeName is the default name for the bridge interface managed
// by the driver when unspecified by the caller.
DefaultBridgeName = "docker0"
// BridgeName label for bridge driver
BridgeName = "com.docker.network.bridge.name"
// EnableIPMasquerade label for bridge driver
EnableIPMasquerade = "com.docker.network.bridge.enable_ip_masquerade"
// EnableICC label
EnableICC = "com.docker.network.bridge.enable_icc"
// DefaultBindingIP label
DefaultBindingIP = "com.docker.network.bridge.host_binding_ipv4"
// DefaultBridge label
DefaultBridge = "com.docker.network.bridge.default_bridge"
// DefaultGatewayV4AuxKey represents the default-gateway configured by the user
DefaultGatewayV4AuxKey = "DefaultGatewayIPv4"
// DefaultGatewayV6AuxKey represents the ipv6 default-gateway configured by the user
DefaultGatewayV6AuxKey = "DefaultGatewayIPv6"
)
// configuration info for the "bridge" driver.
type configuration struct {
EnableIPForwarding bool
EnableIPTables bool
EnableUserlandProxy bool
}
// networkConfiguration for network specific configuration
type networkConfiguration struct {
ID string
BridgeName string
BridgeNameInternal string
EnableIPv6 bool
EnableIPMasquerade bool
EnableICC bool
Mtu int
DefaultBindingIntf string
DefaultBindingIP net.IP
DefaultBridge bool
// Internal fields set after ipam data parsing
AddressIPv4 *net.IPNet
AddressIPv6 *net.IPNet
DefaultGatewayIPv4 net.IP
DefaultGatewayIPv6 net.IP
dbIndex uint64
dbExists bool
Internal bool
}
// endpointConfiguration represents the user specified configuration for the sandbox endpoint
type endpointConfiguration struct {
MacAddress net.HardwareAddr
PortBindings []types.PortBinding
ExposedPorts []types.TransportPort
}
// containerConfiguration represents the user specified configuration for a container
type containerConfiguration struct {
ParentEndpoints []string
ChildEndpoints []string
}
// cnnectivityConfiguration represents the user specified configuration regarding the external connectivity
type connectivityConfiguration struct {
PortBindings []types.PortBinding
ExposedPorts []types.TransportPort
}
type bridgeEndpoint struct {
id string
nid string
srcName string
addr *net.IPNet
addrv6 *net.IPNet
macAddress net.HardwareAddr
config *endpointConfiguration // User specified parameters
containerConfig *containerConfiguration
extConnConfig *connectivityConfiguration
portMapping []types.PortBinding // Operation port bindings
dbIndex uint64
dbExists bool
}
type bridgeInterface struct {
bridgeIPv4 *net.IPNet
bridgeIPv6 *net.IPNet
gatewayIPv4 net.IP
gatewayIPv6 net.IP
}
type bridgeNetwork struct {
id string
bridge *bridgeInterface
config *networkConfiguration
endpoints map[string]*bridgeEndpoint // key: endpoint id
portMapper *portmapper.PortMapper
driver *driver // The network's driver
sync.Mutex
}
type driver struct {
config *configuration
network *bridgeNetwork
natChain *iptables.ChainInfo
filterChain *iptables.ChainInfo
isolationChain *iptables.ChainInfo
networks map[string]*bridgeNetwork
store datastore.DataStore
sync.Mutex
defrouteIP net.IP
}
// New constructs a new bridge driver
func newDriver() *driver {
return &driver{networks: map[string]*bridgeNetwork{}}
}
// Init registers a new instance of bridge driver
func Init(dc driverapi.DriverCallback, config map[string]interface{}) error {
d := newDriver()
if err := d.configure(config); err != nil {
return err
}
c := driverapi.Capability{
DataScope: datastore.LocalScope,
}
return dc.RegisterDriver(networkType, d, c)
}
func (d *driver) NetworkAllocate(id string, option map[string]string, ipV4Data, ipV6Data []driverapi.IPAMData) (map[string]string, error) {
return nil, types.NotImplementedErrorf("not implemented")
}
func (d *driver) NetworkFree(id string) error {
return types.NotImplementedErrorf("not implemented")
}
func (d *driver) EventNotify(etype driverapi.EventType, nid, tableName, key string, value []byte) {
}
func (d *driver) CreateNetwork(id string, option map[string]interface{}, nInfo driverapi.NetworkInfo, ipV4Data, ipV6Data []driverapi.IPAMData) error {
if len(ipV4Data) == 0 || ipV4Data[0].Pool.String() == "0.0.0.0/0" {
return types.BadRequestErrorf("ipv4 pool is empty")
}
// Sanity checks
d.Lock()
if _, ok := d.networks[id]; ok {
d.Unlock()
return types.ForbiddenErrorf("network %s exists", id)
}
d.Unlock()
// Parse and validate the config. It should not conflict with existing networks' config
config, err := parseNetworkOptions(d, id, option)
if err != nil {
return err
}
err = config.processIPAM(id, ipV4Data, ipV6Data)
if err != nil {
return err
}
if err = d.createNetwork(config); err != nil {
return err
}
return d.storeUpdate(config)
}
func newInterface(config *networkConfiguration) *bridgeInterface {
i := &bridgeInterface{}
i.bridgeIPv4 = config.AddressIPv4
i.gatewayIPv4 = config.AddressIPv4.IP
if config.BridgeName == "" {
config.BridgeName = DefaultBridgeName
}
return i
}
// This function prunes the pf.conf for the firewall
// that enable the service successfully.
func fixPFConf() error {
conf := "/etc/firewall/pf.conf"
f, err := os.Open("/etc/firewall/pf.conf")
if err != nil {
return fmt.Errorf("cannot open %s: %v", conf, err)
}
defer f.Close()
// Look for line beginning with "REMOVE THIS LINE"
modify := false
lines := []string{}
scanner := bufio.NewScanner(f)
for scanner.Scan() {
l := scanner.Text()
if strings.Contains(l, "REMOVE THIS LINE") {
modify = true
continue
}
lines = append(lines, fmt.Sprintf("%s\n", l))
}
if err = scanner.Err(); err != nil {
return fmt.Errorf("cannot open %s: %v", conf, err)
}
// No changes needed to fix pf.conf
if !modify {
return nil
}
// Write back the file removing the line found above
tmpname := "/etc/firewall/pf.conf.tmp." + strconv.Itoa(os.Getpid())
tmp, err := os.OpenFile(tmpname,
os.O_CREATE|os.O_TRUNC|os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
return fmt.Errorf("cannot open %s: %v", tmpname, err)
}
defer tmp.Close()
for _, l := range lines {
_, err = tmp.WriteString(l)
if err != nil {
return fmt.Errorf("cannot write to %s: %v",
tmpname, err)
}
}
if err = tmp.Sync(); err != nil {
return fmt.Errorf("cannot sync %s: %v", tmpname, err)
}
if err = os.Rename(tmpname, conf); err != nil {
return fmt.Errorf("cannot rename %s to %s: %v",
tmpname, conf, err)
}
return nil
}
func (d *driver) initFirewall() error {
out, err := exec.Command("/usr/bin/svcs", "-Ho", "state",
"firewall").Output()
if err != nil {
return fmt.Errorf("cannot check firewall state: %v", err)
}
state := strings.TrimSpace(string(out))
if state != "online" {
if state != "disabled" {
return fmt.Errorf("firewall service is in %s state. "+
"please enable service manually.", state)
}
if err = fixPFConf(); err != nil {
return fmt.Errorf("cannot verify pf.conf: %v", err)
}
err = exec.Command("/usr/sbin/svcadm", "enable", "-ts",
"firewall").Run()
if err != nil {
return fmt.Errorf("cannot enable firewall service: %v", err)
}
}
out, err = exec.Command("/usr/sbin/pfctl", "-sr").Output()
if err != nil {
return fmt.Errorf("failed to list firewall rules: %v", err)
}
if strings.Contains(string(out), "anchor \"_auto/docker/*\" all") {
return nil
}
pfctlCmd := "(/usr/sbin/pfctl -sr; " +
"/usr/bin/echo \"anchor \\\"_auto/docker/*\\\"\") |" +
"/usr/sbin/pfctl -f -"
err = exec.Command("/usr/bin/bash", "-c", pfctlCmd).Run()
if err != nil {
return fmt.Errorf("failed to add docker firewall rules: %v", err)
}
return nil
}
func (d *driver) initRouting() error {
err := exec.Command("/usr/sbin/ipadm", "set-prop", "-t",
"-p", "forwarding=on", "ipv4").Run()
if err != nil {
return fmt.Errorf("cannot switch-on IP forwarding: %v", err)
}
routeCmd := "/usr/sbin/ipadm show-addr -p -o addr " +
"`/usr/sbin/route get default | /usr/bin/grep interface | " +
"/usr/bin/awk '{print $2}'`"
out, err := exec.Command("/usr/bin/bash", "-c", routeCmd).Output()
if err != nil {
return fmt.Errorf("cannot get default route: %v", err)
}
defroute := strings.SplitN(string(out), "/", 2)
d.defrouteIP = net.ParseIP(defroute[0])
if d.defrouteIP == nil {
return &ErrNoIPAddr{}
}
return nil
}
func (d *driver) configure(option map[string]interface{}) error {
var err error
if err = d.initFirewall(); err != nil {
return fmt.Errorf("failed to configure firewall: %v", err)
}
if err = d.initRouting(); err != nil {
return fmt.Errorf("failed to configure routing: %v", err)
}
if err = d.initStore(option); err != nil {
return fmt.Errorf("failed to initialize datastore: %v", err)
}
return nil
}
func (d *driver) getNetwork(id string) (*bridgeNetwork, error) {
d.Lock()
defer d.Unlock()
if id == "" {
return nil, types.BadRequestErrorf("invalid network id: %s", id)
}
if nw, ok := d.networks[id]; ok {
return nw, nil
}
return nil, types.NotFoundErrorf("network not found: %s", id)
}
// Return a slice of networks over which caller can iterate safely
func (d *driver) getNetworks() []*bridgeNetwork {
d.Lock()
defer d.Unlock()
ls := make([]*bridgeNetwork, 0, len(d.networks))
for _, nw := range d.networks {
ls = append(ls, nw)
}
return ls
}
func bridgeSetup(config *networkConfiguration) error {
var err error
var bindingIntf string
bridgeName := config.BridgeName
gwName := fmt.Sprintf("%s_gw0", bridgeName)
gwIP := config.AddressIPv4.String()
if config.DefaultBindingIP == nil {
// Default to net0 if bindingIP is not provided.
bindingIntf = "net0"
} else {
ipadmCmd := "/usr/sbin/ipadm show-addr -p -o addrobj,addr |" +
"/usr/bin/grep " + config.DefaultBindingIP.String()
out, err := exec.Command("/usr/bin/bash", "-c", ipadmCmd).Output()
if err != nil {
logrus.Warn("cannot find binding interface")
return err
}
bindingIntf = strings.SplitN(string(out), "/", 2)[0]
if bindingIntf == "" {
logrus.Warnf("cannot parse binding interface %s", string(out))
return &ErrNoIPAddr{}
}
}
config.DefaultBindingIntf = bindingIntf
err = exec.Command("/usr/sbin/dladm", "create-etherstub",
"-t", config.BridgeNameInternal).Run()
if err != nil {
logrus.Warnf("cannot create etherstub %s: %+v", config.BridgeNameInternal, err)
return err
}
err = exec.Command("/usr/sbin/dladm", "create-vnic",
"-t", "-l", config.BridgeNameInternal, gwName).Run()
if err != nil {
logrus.Warnf("cannot create vnic %s", gwName)
return err
}
err = exec.Command("/usr/sbin/ifconfig", gwName,
"plumb", gwIP, "up").Run()
if err != nil {
logrus.Warnf("cannot create gateway interface %s on %s",
gwIP, gwName)
return err
}
tableName := "bridge_nw_subnets"
pfAnchor := fmt.Sprintf("_auto/docker/%s", tableName)
err = exec.Command("/usr/sbin/pfctl", "-a", pfAnchor, "-t", tableName, "-T", "add", gwIP).Run()
if err != nil {
logrus.Warnf("cannot add bridge network '%s' to PF table", bridgeName)
}
pfCmd := fmt.Sprintf(
"/usr/bin/echo \"pass out on %s from %s:network to any nat-to (%s)\n"+
"block in quick from { <%s>, ! %s } to %s\" |"+
"/usr/sbin/pfctl -a _auto/docker/%s -f -",
bindingIntf, gwName, bindingIntf,
tableName, gwIP, gwIP,
bridgeName)
err = exec.Command("/usr/bin/bash", "-c", pfCmd).Run()
if err != nil {
logrus.Warnf("cannot add pf rule using: %s", pfCmd)
return err
}
return nil
}
func bridgeCleanup(config *networkConfiguration, logErr bool) {
var err error
bridgeName := config.BridgeName
tableName := "bridge_nw_subnets"
gwName := fmt.Sprintf("%s_gw0", bridgeName)
gwIP := config.AddressIPv4.String()
pfAnchor := fmt.Sprintf("_auto/docker/%s", bridgeName)
tableAnchor := fmt.Sprintf("_auto/docker/%s", tableName)
err = exec.Command("/usr/sbin/pfctl", "-a", pfAnchor, "-F", "all").Run()
if err != nil && logErr {
logrus.Warn("cannot flush firewall rules")
}
err = exec.Command("/usr/sbin/ifconfig", gwName, "unplumb").Run()
if err != nil && logErr {
logrus.Warn("cannot remove gateway interface")
}
err = exec.Command("/usr/sbin/dladm", "delete-vnic",
"-t", gwName).Run()
if err != nil && logErr {
logrus.Warn("cannot delete vnic")
}
err = exec.Command("/usr/sbin/dladm", "delete-etherstub",
"-t", config.BridgeNameInternal).Run()
if err != nil && logErr {
logrus.Warn("cannot delete etherstub")
}
err = exec.Command("/usr/sbin/pfctl", "-a", tableAnchor, "-t", tableName, "-T", "delete", gwIP).Run()
if err != nil && logErr {
logrus.Warnf("cannot remove bridge network '%s' from PF table", bridgeName)
}
}
func (d *driver) createNetwork(config *networkConfiguration) error {
var err error
logrus.Infof("Creating bridge network: %s %s %s", config.ID,
config.BridgeName, config.AddressIPv4)
networkList := d.getNetworks()
for i, nw := range networkList {
nw.Lock()
nwConfig := nw.config
nw.Unlock()
if err := nwConfig.Conflicts(config); err != nil {
if config.DefaultBridge {
// We encountered and identified a stale default network
// We must delete it as libnetwork is the source of thruth
// The default network being created must be the only one
// This can happen only from docker 1.12 on ward
logrus.Infof("Removing stale default bridge network %s (%s)", nwConfig.ID, nwConfig.BridgeName)
if err := d.DeleteNetwork(nwConfig.ID); err != nil {
logrus.Warnf("Failed to remove stale default network: %s (%s): %v. Will remove from store.", nwConfig.ID, nwConfig.BridgeName, err)
d.storeDelete(nwConfig)
}
networkList = append(networkList[:i], networkList[i+1:]...)
} else {
return types.ForbiddenErrorf(
"cannot create network %s (%s): "+
"conflicts with network %s (%s): %s",
nwConfig.BridgeName, config.ID, nw.id,
nw.config.BridgeName, err.Error())
}
}
}
if config.DefaultBindingIP == nil ||
config.DefaultBindingIP.IsUnspecified() {
config.DefaultBindingIP = d.defrouteIP
}
// Create and set network handler in driver
network := &bridgeNetwork{
id: config.ID,
endpoints: make(map[string]*bridgeEndpoint),
config: config,
portMapper: portmapper.New(""),
driver: d,
}
d.Lock()
d.networks[config.ID] = network
d.Unlock()
// On failure make sure to reset driver network handler to nil
defer func() {
if err != nil {
d.Lock()
delete(d.networks, config.ID)
d.Unlock()
}
}()
// Create or retrieve the bridge L3 interface
bridgeIface := newInterface(config)
network.bridge = bridgeIface
// Verify the network configuration does not conflict with previously installed
// networks. This step is needed now because driver might have now set the bridge
// name on this config struct. And because we need to check for possible address
// conflicts, so we need to check against operational networks.
if err = config.conflictsWithNetworks(config.ID, networkList); err != nil {
return err
}
// We only attempt to create the bridge when the requested device name is
// the default one.
if config.BridgeName != DefaultBridgeName && config.DefaultBridge {
return NonDefaultBridgeExistError(config.BridgeName)
}
bridgeCleanup(config, false)
err = bridgeSetup(config)
if err != nil {
return err
}
return nil
}
func (d *driver) DeleteNetwork(nid string) error {
var err error
// Get network handler and remove it from driver
d.Lock()
n, ok := d.networks[nid]
d.Unlock()
if !ok {
return types.InternalMaskableErrorf("network %s does not exist", nid)
}
d.Lock()
delete(d.networks, nid)
d.Unlock()
// On failure set network handler back in driver, but
// only if is not already taken over by some other thread
defer func() {
if err != nil {
d.Lock()
if _, ok := d.networks[nid]; !ok {
d.networks[nid] = n
}
d.Unlock()
}
}()
// Sanity check
if n == nil {
err = driverapi.ErrNoNetwork(nid)
return err
}
// Cannot remove network if endpoints are still present
if len(n.endpoints) != 0 {
err = ActiveEndpointsError(n.id)
return err
}
bridgeCleanup(n.config, true)
logrus.Infof("Deleting bridge network: %s", nid[:12])
return d.storeDelete(n.config)
}
func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo, epOptions map[string]interface{}) error {
if ifInfo == nil {
return errors.New("invalid interface passed")
}
// Get the network handler and make sure it exists
d.Lock()
n, ok := d.networks[nid]
d.Unlock()
if !ok {
return types.NotFoundErrorf("network %s does not exist", nid)
}
if n == nil {
return driverapi.ErrNoNetwork(nid)
}
// Sanity check
n.Lock()
if n.id != nid {
n.Unlock()
return InvalidNetworkIDError(nid)
}
n.Unlock()
// Check if endpoint id is good and retrieve correspondent endpoint
ep, err := n.getEndpoint(eid)
if err != nil {
return err
}
// Endpoint with that id exists either on desired or other sandbox
if ep != nil {
return driverapi.ErrEndpointExists(eid)
}
// Try to convert the options to endpoint configuration
epConfig, err := parseEndpointOptions(epOptions)
if err != nil {
return err
}
// Create and add the endpoint
n.Lock()
endpoint := &bridgeEndpoint{id: eid, config: epConfig}
n.endpoints[eid] = endpoint
n.Unlock()
// On failure make sure to remove the endpoint
defer func() {
if err != nil {
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
}
}()
// Create the sandbox side pipe interface
if ifInfo.MacAddress() == nil {
// No MAC address assigned to interface. Generate a random MAC to assign
endpoint.macAddress = netutils.GenerateRandomMAC()
if err := ifInfo.SetMacAddress(endpoint.macAddress); err != nil {
logrus.Warnf("Unable to set mac address: %s to endpoint: %s",
endpoint.macAddress.String(), endpoint.id)
return err
}
} else {
endpoint.macAddress = ifInfo.MacAddress()
}
endpoint.addr = ifInfo.Address()
endpoint.addrv6 = ifInfo.AddressIPv6()
c := n.config
// Program any required port mapping and store them in the endpoint
endpoint.portMapping, err = n.allocatePorts(endpoint, c.DefaultBindingIntf, c.DefaultBindingIP, true)
if err != nil {
return err
}
return nil
}
func (d *driver) DeleteEndpoint(nid, eid string) error {
var err error
// Get the network handler and make sure it exists
d.Lock()
n, ok := d.networks[nid]
d.Unlock()
if !ok {
return types.InternalMaskableErrorf("network %s does not exist", nid)
}
if n == nil {
return driverapi.ErrNoNetwork(nid)
}
// Sanity Check
n.Lock()
if n.id != nid {
n.Unlock()
return InvalidNetworkIDError(nid)
}
n.Unlock()
// Check endpoint id and if an endpoint is actually there
ep, err := n.getEndpoint(eid)
if err != nil {
return err
}
if ep == nil {
return EndpointNotFoundError(eid)
}
// Remove it
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
// On failure make sure to set back ep in n.endpoints, but only
// if it hasn't been taken over already by some other thread.
defer func() {
if err != nil {
n.Lock()
if _, ok := n.endpoints[eid]; !ok {
n.endpoints[eid] = ep
}
n.Unlock()
}
}()
err = n.releasePorts(ep)
if err != nil {
logrus.Warn(err)
}
return nil
}
func (d *driver) EndpointOperInfo(nid, eid string) (map[string]interface{}, error) {
// Get the network handler and make sure it exists
d.Lock()
n, ok := d.networks[nid]
d.Unlock()
if !ok {
return nil, types.NotFoundErrorf("network %s does not exist", nid)
}
if n == nil {
return nil, driverapi.ErrNoNetwork(nid)
}
// Sanity check
n.Lock()
if n.id != nid {
n.Unlock()
return nil, InvalidNetworkIDError(nid)
}
n.Unlock()
// Check if endpoint id is good and retrieve correspondent endpoint
ep, err := n.getEndpoint(eid)
if err != nil {
return nil, err
}
if ep == nil {
return nil, driverapi.ErrNoEndpoint(eid)
}
m := make(map[string]interface{})
if ep.extConnConfig != nil && ep.extConnConfig.ExposedPorts != nil {
// Return a copy of the config data
epc := make([]types.TransportPort, 0, len(ep.extConnConfig.ExposedPorts))
for _, tp := range ep.extConnConfig.ExposedPorts {
epc = append(epc, tp.GetCopy())
}
m[netlabel.ExposedPorts] = epc
}
if ep.portMapping != nil {
// Return a copy of the operational data
pmc := make([]types.PortBinding, 0, len(ep.portMapping))
for _, pm := range ep.portMapping {
pmc = append(pmc, pm.GetCopy())
}
m[netlabel.PortMap] = pmc
}
if len(ep.macAddress) != 0 {
m[netlabel.MacAddress] = ep.macAddress
}
return m, nil
}
// Join method is invoked when a Sandbox is attached to an endpoint.
func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
network, err := d.getNetwork(nid)
if err != nil {
return err
}
endpoint, err := network.getEndpoint(eid)
if err != nil {
return err
}
if endpoint == nil {
return EndpointNotFoundError(eid)
}
endpoint.containerConfig, err = parseContainerOptions(options)
if err != nil {
return err
}
err = jinfo.SetGateway(network.bridge.gatewayIPv4)
if err != nil {
return err
}
err = jinfo.SetGatewayIPv6(network.bridge.gatewayIPv6)
if err != nil {
return err
}
return nil
}
func (d *driver) link(network *bridgeNetwork, endpoint *bridgeEndpoint, enable bool) error {
return nil
}
// Leave method is invoked when a Sandbox detaches from an endpoint.
func (d *driver) Leave(nid, eid string) error {
network, err := d.getNetwork(nid)
if err != nil {
return types.InternalMaskableErrorf("%s", err)
}
endpoint, err := network.getEndpoint(eid)
if err != nil {
return err
}
if endpoint == nil {
return EndpointNotFoundError(eid)
}
return nil
}
func (d *driver) ProgramExternalConnectivity(nid, eid string, options map[string]interface{}) error {
network, err := d.getNetwork(nid)
if err != nil {
return err
}
endpoint, err := network.getEndpoint(eid)
if err != nil {
return err
}
if endpoint == nil {
return EndpointNotFoundError(eid)
}
endpoint.extConnConfig, err = parseConnectivityOptions(options)
if err != nil {
return err
}
// Program any required port mapping and store them in the endpoint
endpoint.portMapping, err = network.allocatePorts(endpoint, network.config.DefaultBindingIntf, network.config.DefaultBindingIP, true)
if err != nil {
return err
}
if !network.config.EnableICC {
return d.link(network, endpoint, true)
}
return nil
}
func (d *driver) RevokeExternalConnectivity(nid, eid string) error {
network, err := d.getNetwork(nid)
if err != nil {
return err
}
endpoint, err := network.getEndpoint(eid)
if err != nil {
return err
}
if endpoint == nil {
return EndpointNotFoundError(eid)
}
err = network.releasePorts(endpoint)
if err != nil {
logrus.Warn(err)
}
return nil
}
func (d *driver) Type() string {
return networkType
}
func (d *driver) IsBuiltIn() bool {
return true
}
// DiscoverNew is a notification for a new discovery event, such as a new node joining a cluster
func (d *driver) DiscoverNew(dType discoverapi.DiscoveryType, data interface{}) error {
return nil
}
// DiscoverDelete is a notification for a discovery delete event, such as a node leaving a cluster
func (d *driver) DiscoverDelete(dType discoverapi.DiscoveryType, data interface{}) error {
return nil
}
// Validate performs a static validation on the network configuration parameters.
// Whatever can be assessed a priori before attempting any programming.
func (c *networkConfiguration) Validate() error {
if c.Mtu < 0 {
return ErrInvalidMtu(c.Mtu)
}
// If bridge v4 subnet is specified
if c.AddressIPv4 != nil {
// If default gw is specified, it must be part of bridge subnet
if c.DefaultGatewayIPv4 != nil {
if !c.AddressIPv4.Contains(c.DefaultGatewayIPv4) {
return &ErrInvalidGateway{}
}
}
}
// If default v6 gw is specified, AddressIPv6 must be specified and gw must belong to AddressIPv6 subnet
if c.EnableIPv6 && c.DefaultGatewayIPv6 != nil {
if c.AddressIPv6 == nil || !c.AddressIPv6.Contains(c.DefaultGatewayIPv6) {
return &ErrInvalidGateway{}
}
}
return nil
}
// Checks whether this network's configuration for the network with this id conflicts with any of the passed networks
func (c *networkConfiguration) conflictsWithNetworks(id string, others []*bridgeNetwork) error {
for _, nw := range others {
nw.Lock()
nwID := nw.id
nwConfig := nw.config
nwBridge := nw.bridge
nw.Unlock()
if nwID == id {
continue
}
// Verify the name (which may have been set by newInterface()) does not conflict with
// existing bridge interfaces. Ironically the system chosen name gets stored in the config...
// Basically we are checking if the two original configs were both empty.
if nwConfig.BridgeName == c.BridgeName {
return types.ForbiddenErrorf("conflicts with network %s (%s) by bridge name", nwID, nwConfig.BridgeName)
}
// If this network config specifies the AddressIPv4, we need
// to make sure it does not conflict with any previously allocated
// bridges. This could not be completely caught by the config conflict
// check, because networks which config does not specify the AddressIPv4
// get their address and subnet selected by the driver (see electBridgeIPv4())
if c.AddressIPv4 != nil {
if nwBridge.bridgeIPv4.Contains(c.AddressIPv4.IP) ||
c.AddressIPv4.Contains(nwBridge.bridgeIPv4.IP) {
return types.ForbiddenErrorf("conflicts with network %s (%s) by ip network", nwID, nwConfig.BridgeName)
}
}
}
return nil
}
// Conflicts check if two NetworkConfiguration objects overlap
func (c *networkConfiguration) Conflicts(o *networkConfiguration) error {
if o == nil {
return fmt.Errorf("same configuration")
}
// Also empty, because only one network with empty name is allowed
if c.BridgeName == o.BridgeName {
return fmt.Errorf("networks have same bridge name")
}
// They must be in different subnets
if (c.AddressIPv4 != nil && o.AddressIPv4 != nil) &&
(c.AddressIPv4.Contains(o.AddressIPv4.IP) || o.AddressIPv4.Contains(c.AddressIPv4.IP)) {
return fmt.Errorf("networks have overlapping IPv4")
}
// They must be in different v6 subnets
if (c.AddressIPv6 != nil && o.AddressIPv6 != nil) &&
(c.AddressIPv6.Contains(o.AddressIPv6.IP) || o.AddressIPv6.Contains(c.AddressIPv6.IP)) {
return fmt.Errorf("networks have overlapping IPv6")
}
return nil
}
func (c *networkConfiguration) fromLabels(labels map[string]string) error {
var err error
for label, value := range labels {
switch label {
case BridgeName:
c.BridgeName = value
case netlabel.DriverMTU:
if c.Mtu, err = strconv.Atoi(value); err != nil {
return parseErr(label, value, err.Error())
}
case netlabel.EnableIPv6:
if c.EnableIPv6, err = strconv.ParseBool(value); err != nil {
return parseErr(label, value, err.Error())
}
case EnableIPMasquerade:
if c.EnableIPMasquerade, err = strconv.ParseBool(value); err != nil {
return parseErr(label, value, err.Error())
}
case EnableICC:
if c.EnableICC, err = strconv.ParseBool(value); err != nil {
return parseErr(label, value, err.Error())
}
case DefaultBridge:
if c.DefaultBridge, err = strconv.ParseBool(value); err != nil {
return parseErr(label, value, err.Error())
}
case DefaultBindingIP:
if c.DefaultBindingIP = net.ParseIP(value); c.DefaultBindingIP == nil {
return parseErr(label, value, "nil ip")
}
}
}
return nil
}
func parseErr(label, value, errString string) error {
return types.BadRequestErrorf("failed to parse %s value: %v (%s)", label, value, errString)
}
func parseNetworkGenericOptions(data interface{}) (*networkConfiguration, error) {
var (
err error
config *networkConfiguration
)
switch opt := data.(type) {
case *networkConfiguration:
config = opt
case map[string]string:
config = &networkConfiguration{
EnableICC: true,
EnableIPMasquerade: true,
}
err = config.fromLabels(opt)
case options.Generic:
var opaqueConfig interface{}
if opaqueConfig, err = options.GenerateFromModel(opt, config); err == nil {
config = opaqueConfig.(*networkConfiguration)
}
default:
err = types.BadRequestErrorf("do not recognize network configuration format: %T", opt)
}
return config, err
}
func parseNetworkOptions(d *driver, id string, option options.Generic) (*networkConfiguration, error) {
var (
err error
config = &networkConfiguration{}
)
// Parse generic label first, config will be re-assigned
if genData, ok := option[netlabel.GenericData]; ok && genData != nil {
if config, err = parseNetworkGenericOptions(genData); err != nil {
return nil, err
}
}
// Process well-known labels next
if val, ok := option[netlabel.EnableIPv6]; ok {
config.EnableIPv6 = val.(bool)
}
if val, ok := option[netlabel.Internal]; ok {
if internal, ok := val.(bool); ok && internal {
config.Internal = true
}
}
// Finally validate the configuration
if err = config.Validate(); err != nil {
return nil, err
}
if config.BridgeName == "" && config.DefaultBridge == false {
config.BridgeName = "br_" + id[:12] + "_0"
}
lastChar := config.BridgeName[len(config.BridgeName)-1:]
if _, err = strconv.Atoi(lastChar); err != nil {
config.BridgeNameInternal = config.BridgeName + "_0"
} else {
config.BridgeNameInternal = config.BridgeName
}
config.ID = id
return config, nil
}
func (c *networkConfiguration) processIPAM(id string, ipamV4Data, ipamV6Data []driverapi.IPAMData) error {
if len(ipamV4Data) > 1 || len(ipamV6Data) > 1 {
return types.ForbiddenErrorf("bridge driver doesnt support multiple subnets")
}
if len(ipamV4Data) == 0 {
return types.BadRequestErrorf("bridge network %s requires ipv4 configuration", id)
}
if ipamV4Data[0].Gateway != nil {
c.AddressIPv4 = types.GetIPNetCopy(ipamV4Data[0].Gateway)
}
if gw, ok := ipamV4Data[0].AuxAddresses[DefaultGatewayV4AuxKey]; ok {
c.DefaultGatewayIPv4 = gw.IP
}
if len(ipamV6Data) > 0 {
c.AddressIPv6 = ipamV6Data[0].Pool
if ipamV6Data[0].Gateway != nil {
c.AddressIPv6 = types.GetIPNetCopy(ipamV6Data[0].Gateway)
}
if gw, ok := ipamV6Data[0].AuxAddresses[DefaultGatewayV6AuxKey]; ok {
c.DefaultGatewayIPv6 = gw.IP
}
}
return nil
}
func (n *bridgeNetwork) getEndpoint(eid string) (*bridgeEndpoint, error) {
n.Lock()
defer n.Unlock()
if eid == "" {
return nil, InvalidEndpointIDError(eid)
}
if ep, ok := n.endpoints[eid]; ok {
return ep, nil
}
return nil, nil
}
func parseEndpointOptions(epOptions map[string]interface{}) (*endpointConfiguration, error) {
if epOptions == nil {
return nil, nil
}
ec := &endpointConfiguration{}
if opt, ok := epOptions[netlabel.MacAddress]; ok {
if mac, ok := opt.(net.HardwareAddr); ok {
ec.MacAddress = mac
} else {
return nil, &ErrInvalidEndpointConfig{}
}
}
if opt, ok := epOptions[netlabel.PortMap]; ok {
if bs, ok := opt.([]types.PortBinding); ok {
ec.PortBindings = bs
} else {
return nil, &ErrInvalidEndpointConfig{}
}
}
if opt, ok := epOptions[netlabel.ExposedPorts]; ok {
if ports, ok := opt.([]types.TransportPort); ok {
ec.ExposedPorts = ports
} else {
return nil, &ErrInvalidEndpointConfig{}
}
}
return ec, nil
}
func parseContainerOptions(cOptions map[string]interface{}) (*containerConfiguration, error) {
if cOptions == nil {
return nil, nil
}
genericData := cOptions[netlabel.GenericData]
if genericData == nil {
return nil, nil
}
switch opt := genericData.(type) {
case options.Generic:
opaqueConfig, err := options.GenerateFromModel(opt, &containerConfiguration{})
if err != nil {
return nil, err
}
return opaqueConfig.(*containerConfiguration), nil
case *containerConfiguration:
return opt, nil
default:
return nil, nil
}
}
func parseConnectivityOptions(cOptions map[string]interface{}) (*connectivityConfiguration, error) {
if cOptions == nil {
return nil, nil
}
cc := &connectivityConfiguration{}
if opt, ok := cOptions[netlabel.PortMap]; ok {
if pb, ok := opt.([]types.PortBinding); ok {
cc.PortBindings = pb
} else {
return nil, types.BadRequestErrorf("Invalid port mapping data in connectivity configuration: %v", opt)
}
}
if opt, ok := cOptions[netlabel.ExposedPorts]; ok {
if ports, ok := opt.([]types.TransportPort); ok {
cc.ExposedPorts = ports
} else {
return nil, types.BadRequestErrorf("Invalid exposed ports data in connectivity configuration: %v", opt)
}
}
return cc, nil
}
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