/
portset.go
119 lines (91 loc) · 2.73 KB
/
portset.go
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package iptablesctrl
import (
"fmt"
"strconv"
"github.com/aporeto-inc/go-ipset/ipset"
"go.aporeto.io/trireme-lib/controller/constants"
"go.aporeto.io/trireme-lib/policy"
"go.uber.org/zap"
)
func (i *Instance) getPortSet(contextID string) string {
portset, err := i.contextIDToPortSetMap.Get(contextID)
if err != nil {
return ""
}
return portset.(string)
}
// createPortSets creates either UID or process port sets. This is only
// needed for Linux PUs and it returns immediately for container PUs.
func (i *Instance) createPortSet(contextID string, puInfo *policy.PUInfo) error {
if i.mode == constants.RemoteContainer {
return nil
}
username := puInfo.Runtime.Options().UserID
prefix := ""
if username != "" {
prefix = uidPortSetPrefix
} else {
prefix = processPortSetPrefix
}
portSetName := puPortSetName(contextID, prefix)
if puseterr := i.createPUPortSet(portSetName); puseterr != nil {
return puseterr
}
i.contextIDToPortSetMap.AddOrUpdate(contextID, portSetName)
return nil
}
// deletePortSet delets the ports set that was created for a Linux PU.
// It returns without errors for container PUs.
func (i *Instance) deletePortSet(contextID string) error {
if i.mode == constants.RemoteContainer {
return nil
}
portSetName := i.getPortSet(contextID)
if portSetName == "" {
return fmt.Errorf("Failed to find port set")
}
ips := ipset.IPSet{
Name: portSetName,
}
if err := ips.Destroy(); err != nil {
return fmt.Errorf("Failed to delete pu port set "+portSetName, zap.Error(err))
}
if err := i.contextIDToPortSetMap.Remove(contextID); err != nil {
zap.L().Debug("portset not found for the contextID", zap.String("contextID", contextID))
}
return nil
}
// DeletePortFromPortSet deletes ports from port sets
func (i *Instance) DeletePortFromPortSet(contextID string, port string) error {
portSetName := i.getPortSet(contextID)
if portSetName == "" {
return fmt.Errorf("unable to get portset for contextID %s", contextID)
}
ips := ipset.IPSet{
Name: portSetName,
}
if _, err := strconv.Atoi(port); err != nil {
return fmt.Errorf("invalid port: %s", err)
}
if err := ips.Del(port); err != nil {
return fmt.Errorf("unable to delete port from portset: %s", err)
}
return nil
}
// AddPortToPortSet adds ports to the portsets
func (i *Instance) AddPortToPortSet(contextID string, port string) error {
portSetName := i.getPortSet(contextID)
if portSetName == "" {
return fmt.Errorf("unable to get portset for contextID %s", contextID)
}
ips := ipset.IPSet{
Name: portSetName,
}
if _, err := strconv.Atoi(port); err != nil {
return fmt.Errorf("invalid port: %s", err)
}
if err := ips.Add(port, 0); err != nil {
return fmt.Errorf("unable to add port to portset: %s", err)
}
return nil
}