dotcloud/docker

package overlay

import (
    "context"
    "fmt"
    "net"

    "github.com/containerd/log"
    "github.com/docker/docker/libnetwork/driverapi"
    "github.com/docker/docker/libnetwork/types"
    "github.com/gogo/protobuf/proto"
    "go.opentelemetry.io/otel"
    "go.opentelemetry.io/otel/attribute"
    "go.opentelemetry.io/otel/trace"
)

// Join method is invoked when a Sandbox is attached to an endpoint.
func (d *driver) Join(ctx context.Context, nid, eid string, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
    ctx, span := otel.Tracer("").Start(ctx, "libnetwork.drivers.windows_overlay.Join", trace.WithAttributes(
        attribute.String("nid", nid),
        attribute.String("eid", eid),
        attribute.String("sboxKey", sboxKey)))
    defer span.End()

    if err := validateID(nid, eid); err != nil {
        return err
    }

    n := d.network(nid)
    if n == nil {
        return fmt.Errorf("could not find network with id %s", nid)
    }

    ep := n.endpoint(eid)
    if ep == nil {
        return fmt.Errorf("could not find endpoint with id %s", eid)
    }

    buf, err := proto.Marshal(&PeerRecord{
        EndpointIP:       ep.addr.String(),
        EndpointMAC:      ep.mac.String(),
        TunnelEndpointIP: n.providerAddress,
    })
    if err != nil {
        return err
    }

    if err := jinfo.AddTableEntry(ovPeerTable, eid, buf); err != nil {
        log.G(ctx).Errorf("overlay: Failed adding table entry to joininfo: %v", err)
    }

    if ep.disablegateway {
        jinfo.DisableGatewayService()
    }

    return nil
}

func (d *driver) EventNotify(etype driverapi.EventType, nid, tableName, key string, value []byte) {
    if tableName != ovPeerTable {
        log.G(context.TODO()).Errorf("Unexpected table notification for table %s received", tableName)
        return
    }

    eid := key

    var peer PeerRecord
    if err := proto.Unmarshal(value, &peer); err != nil {
        log.G(context.TODO()).Errorf("Failed to unmarshal peer record: %v", err)
        return
    }

    n := d.network(nid)
    if n == nil {
        return
    }

    // Ignore local peers. We already know about them and they
    // should not be added to vxlan fdb.
    if peer.TunnelEndpointIP == n.providerAddress {
        return
    }

    addr, err := types.ParseCIDR(peer.EndpointIP)
    if err != nil {
        log.G(context.TODO()).Errorf("Invalid peer IP %s received in event notify", peer.EndpointIP)
        return
    }

    mac, err := net.ParseMAC(peer.EndpointMAC)
    if err != nil {
        log.G(context.TODO()).Errorf("Invalid mac %s received in event notify", peer.EndpointMAC)
        return
    }

    vtep := net.ParseIP(peer.TunnelEndpointIP)
    if vtep == nil {
        log.G(context.TODO()).Errorf("Invalid VTEP %s received in event notify", peer.TunnelEndpointIP)
        return
    }

    if etype == driverapi.Delete {
        d.peerDelete(nid, eid, addr.IP, addr.Mask, mac, vtep, true)
        return
    }

    err = d.peerAdd(nid, eid, addr.IP, addr.Mask, mac, vtep, true)
    if err != nil {
        log.G(context.TODO()).Errorf("peerAdd failed (%v) for ip %s with mac %s", err, addr.IP.String(), mac.String())
    }
}

func (d *driver) DecodeTableEntry(tablename string, key string, value []byte) (string, map[string]string) {
    return "", nil
}

// Leave method is invoked when a Sandbox detaches from an endpoint.
func (d *driver) Leave(nid, eid string) error {
    if err := validateID(nid, eid); err != nil {
        return err
    }

    return nil
}