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package libnetwork
import (
"fmt"
"net"
"sync"
"github.com/docker/docker/libnetwork/internal/setmatrix"
)
var (
// A global monotonic counter to assign firewall marks to
// services.
fwMarkCtr uint32 = 256
fwMarkCtrMu sync.Mutex
)
type portConfigs []*PortConfig
func (p portConfigs) String() string {
if len(p) == 0 {
return ""
}
pc := p[0]
str := fmt.Sprintf("%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
for _, pc := range p[1:] {
str = str + fmt.Sprintf(",%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
}
return str
}
type serviceKey struct {
id string
ports string
}
type service struct {
name string // Service Name
id string // Service ID
// Map of loadbalancers for the service one-per attached
// network. It is keyed with network ID.
loadBalancers map[string]*loadBalancer
// List of ingress ports exposed by the service
ingressPorts portConfigs
// Service aliases
aliases []string
// This maps tracks for each IP address the list of endpoints ID
// associated with it. At stable state the endpoint ID expected is 1
// but during transition and service change it is possible to have
// temporary more than 1
ipToEndpoint setmatrix.SetMatrix[string]
deleted bool
sync.Mutex
}
// assignIPToEndpoint inserts the mapping between the IP and the endpoint identifier
// returns true if the mapping was not present, false otherwise
// returns also the number of endpoints associated to the IP
func (s *service) assignIPToEndpoint(ip, eID string) (bool, int) {
return s.ipToEndpoint.Insert(ip, eID)
}
// removeIPToEndpoint removes the mapping between the IP and the endpoint identifier
// returns true if the mapping was deleted, false otherwise
// returns also the number of endpoints associated to the IP
func (s *service) removeIPToEndpoint(ip, eID string) (bool, int) {
return s.ipToEndpoint.Remove(ip, eID)
}
func (s *service) printIPToEndpoint(ip string) (string, bool) {
return s.ipToEndpoint.String(ip)
}
type lbBackend struct {
ip net.IP
disabled bool
}
type loadBalancer struct {
vip net.IP
fwMark uint32
// Map of backend IPs backing this loadbalancer on this
// network. It is keyed with endpoint ID.
backEnds map[string]*lbBackend
// Back pointer to service to which the loadbalancer belongs.
service *service
sync.Mutex
}
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