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ovn-nb-acl.go
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ovn-nb-acl.go
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package ovs
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/ovn-org/libovsdb/model"
"github.com/ovn-org/libovsdb/ovsdb"
netv1 "k8s.io/api/networking/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/klog/v2"
kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
ovsclient "github.com/kubeovn/kube-ovn/pkg/ovsdb/client"
"github.com/kubeovn/kube-ovn/pkg/ovsdb/ovnnb"
"github.com/kubeovn/kube-ovn/pkg/util"
)
// UpdateIngressACLOps return operation that creates an ingress ACL
func (c *OVNNbClient) UpdateIngressACLOps(pgName, asIngressName, asExceptName, protocol string, npp []netv1.NetworkPolicyPort, logEnable bool, namedPortMap map[string]*util.NamedPortInfo) ([]ovsdb.Operation, error) {
acls := make([]*ovnnb.ACL, 0)
if strings.HasSuffix(asIngressName, ".0") || strings.HasSuffix(asIngressName, ".all") {
// create the default drop rule for only once
// both IPv4 and IPv6 traffic should be forbade in dual-stack situation
allIPMatch := NewAndACLMatch(
NewACLMatch("outport", "==", "@"+pgName, ""),
NewACLMatch("ip", "", "", ""),
)
options := func(acl *ovnnb.ACL) {
if logEnable {
acl.Log = true
acl.Severity = &ovnnb.ACLSeverityWarning
}
}
defaultDropACL, err := c.newACLWithoutCheck(pgName, ovnnb.ACLDirectionToLport, util.IngressDefaultDrop, allIPMatch.String(), ovnnb.ACLActionDrop, options)
if err != nil {
return nil, fmt.Errorf("new default drop ingress acl for port group %s: %v", pgName, err)
}
acls = append(acls, defaultDropACL)
}
/* allow acl */
matches := newNetworkPolicyACLMatch(pgName, asIngressName, asExceptName, protocol, ovnnb.ACLDirectionToLport, npp, namedPortMap)
for _, m := range matches {
allowACL, err := c.newACLWithoutCheck(pgName, ovnnb.ACLDirectionToLport, util.IngressAllowPriority, m, ovnnb.ACLActionAllowRelated)
if err != nil {
return nil, fmt.Errorf("new allow ingress acl for port group %s: %v", pgName, err)
}
acls = append(acls, allowACL)
}
ops, err := c.CreateAclsOps(pgName, portGroupKey, acls...)
if err != nil {
return nil, err
}
return ops, nil
}
// UpdateEgressACLOps return operation that creates an egress ACL
func (c *OVNNbClient) UpdateEgressACLOps(pgName, asEgressName, asExceptName, protocol string, npp []netv1.NetworkPolicyPort, logEnable bool, namedPortMap map[string]*util.NamedPortInfo) ([]ovsdb.Operation, error) {
acls := make([]*ovnnb.ACL, 0)
if strings.HasSuffix(asEgressName, ".0") || strings.HasSuffix(asEgressName, ".all") {
// create the default drop rule for only once
// both IPv4 and IPv6 traffic should be forbade in dual-stack situation
allIPMatch := NewAndACLMatch(
NewACLMatch("inport", "==", "@"+pgName, ""),
NewACLMatch("ip", "", "", ""),
)
options := func(acl *ovnnb.ACL) {
if logEnable {
acl.Log = true
acl.Severity = &ovnnb.ACLSeverityWarning
}
if acl.Options == nil {
acl.Options = make(map[string]string)
}
acl.Options["apply-after-lb"] = "true"
}
defaultDropACL, err := c.newACLWithoutCheck(pgName, ovnnb.ACLDirectionFromLport, util.EgressDefaultDrop, allIPMatch.String(), ovnnb.ACLActionDrop, options)
if err != nil {
klog.Error(err)
return nil, fmt.Errorf("new default drop egress acl for port group %s: %v", pgName, err)
}
acls = append(acls, defaultDropACL)
}
/* allow acl */
matches := newNetworkPolicyACLMatch(pgName, asEgressName, asExceptName, protocol, ovnnb.ACLDirectionFromLport, npp, namedPortMap)
for _, m := range matches {
allowACL, err := c.newACLWithoutCheck(pgName, ovnnb.ACLDirectionFromLport, util.EgressAllowPriority, m, ovnnb.ACLActionAllowRelated, func(acl *ovnnb.ACL) {
if acl.Options == nil {
acl.Options = make(map[string]string)
}
acl.Options["apply-after-lb"] = "true"
})
if err != nil {
klog.Error(err)
return nil, fmt.Errorf("new allow egress acl for port group %s: %v", pgName, err)
}
acls = append(acls, allowACL)
}
ops, err := c.CreateAclsOps(pgName, portGroupKey, acls...)
if err != nil {
klog.Error(err)
return nil, err
}
return ops, nil
}
// CreateGatewayACL create allow acl for subnet gateway
func (c *OVNNbClient) CreateGatewayACL(lsName, pgName, gateway string) error {
acls := make([]*ovnnb.ACL, 0)
var parentName, parentType string
switch {
case len(pgName) != 0:
parentName, parentType = pgName, portGroupKey
case len(lsName) != 0:
parentName, parentType = lsName, logicalSwitchKey
default:
return fmt.Errorf("one of port group name and logical switch name must be specified")
}
for _, gw := range strings.Split(gateway, ",") {
protocol := util.CheckProtocol(gw)
ipSuffix := "ip4"
if protocol == kubeovnv1.ProtocolIPv6 {
ipSuffix = "ip6"
}
allowIngressACL, err := c.newACL(parentName, ovnnb.ACLDirectionToLport, util.IngressAllowPriority, fmt.Sprintf("%s.src == %s", ipSuffix, gw), ovnnb.ACLActionAllowStateless)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow ingress acl for %s: %v", parentName, err)
}
options := func(acl *ovnnb.ACL) {
if acl.Options == nil {
acl.Options = make(map[string]string)
}
acl.Options["apply-after-lb"] = "true"
}
allowEgressACL, err := c.newACL(parentName, ovnnb.ACLDirectionFromLport, util.EgressAllowPriority, fmt.Sprintf("%s.dst == %s", ipSuffix, gw), ovnnb.ACLActionAllowStateless, options)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow egress acl for %s: %v", parentName, err)
}
acls = append(acls, allowIngressACL, allowEgressACL)
if ipSuffix == "ip6" {
ndACL, err := c.newACL(parentName, ovnnb.ACLDirectionFromLport, util.EgressAllowPriority, "nd || nd_ra || nd_rs", ovnnb.ACLActionAllowStateless, options)
if err != nil {
klog.Error(err)
return fmt.Errorf("new nd acl for %s: %v", parentName, err)
}
acls = append(acls, ndACL)
}
}
if err := c.CreateAcls(parentName, parentType, acls...); err != nil {
return fmt.Errorf("add gateway acls to %s: %v", pgName, err)
}
return nil
}
// CreateNodeACL create allow acl for node join ip
func (c *OVNNbClient) CreateNodeACL(pgName, nodeIPStr, joinIPStr string) error {
acls := make([]*ovnnb.ACL, 0)
nodeIPs := strings.Split(nodeIPStr, ",")
for _, nodeIP := range nodeIPs {
protocol := util.CheckProtocol(nodeIP)
ipSuffix := "ip4"
if protocol == kubeovnv1.ProtocolIPv6 {
ipSuffix = "ip6"
}
pgAs := fmt.Sprintf("%s_%s", pgName, ipSuffix)
allowIngressACL, err := c.newACL(pgName, ovnnb.ACLDirectionToLport, util.NodeAllowPriority, fmt.Sprintf("%s.src == %s && %s.dst == $%s", ipSuffix, nodeIP, ipSuffix, pgAs), ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow ingress acl for port group %s: %v", pgName, err)
}
options := func(acl *ovnnb.ACL) {
if acl.Options == nil {
acl.Options = make(map[string]string)
}
acl.Options["apply-after-lb"] = "true"
}
allowEgressACL, err := c.newACL(pgName, ovnnb.ACLDirectionFromLport, util.NodeAllowPriority, fmt.Sprintf("%s.dst == %s && %s.src == $%s", ipSuffix, nodeIP, ipSuffix, pgAs), ovnnb.ACLActionAllowRelated, options)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow egress acl for port group %s: %v", pgName, err)
}
acls = append(acls, allowIngressACL, allowEgressACL)
}
for _, joinIP := range strings.Split(joinIPStr, ",") {
if util.ContainsString(nodeIPs, joinIP) {
continue
}
protocol := util.CheckProtocol(joinIP)
ipSuffix := "ip4"
if protocol == kubeovnv1.ProtocolIPv6 {
ipSuffix = "ip6"
}
pgAs := fmt.Sprintf("%s_%s", pgName, ipSuffix)
if err := c.DeleteACL(pgName, portGroupKey, ovnnb.ACLDirectionToLport, util.NodeAllowPriority, fmt.Sprintf("%s.src == %s && %s.dst == $%s", ipSuffix, joinIP, ipSuffix, pgAs)); err != nil {
klog.Errorf("delete ingress acl from port group %s: %v", pgName, err)
return err
}
if err := c.DeleteACL(pgName, portGroupKey, ovnnb.ACLDirectionFromLport, util.NodeAllowPriority, fmt.Sprintf("%s.dst == %s && %s.src == $%s", ipSuffix, joinIP, ipSuffix, pgAs)); err != nil {
klog.Errorf("delete egress acl from port group %s: %v", pgName, err)
return err
}
}
if err := c.CreateAcls(pgName, portGroupKey, acls...); err != nil {
return fmt.Errorf("add node acls to port group %s: %v", pgName, err)
}
return nil
}
func (c *OVNNbClient) CreateSgDenyAllACL(sgName string) error {
pgName := GetSgPortGroupName(sgName)
ingressACL, err := c.newACL(pgName, ovnnb.ACLDirectionToLport, util.SecurityGroupDropPriority, fmt.Sprintf("outport == @%s && ip", pgName), ovnnb.ACLActionDrop)
if err != nil {
klog.Error(err)
return fmt.Errorf("new deny all ingress acl for security group %s: %v", sgName, err)
}
egressACL, err := c.newACL(pgName, ovnnb.ACLDirectionFromLport, util.SecurityGroupDropPriority, fmt.Sprintf("inport == @%s && ip", pgName), ovnnb.ACLActionDrop)
if err != nil {
klog.Error(err)
return fmt.Errorf("new deny all egress acl for security group %s: %v", sgName, err)
}
if err := c.CreateAcls(pgName, portGroupKey, ingressACL, egressACL); err != nil {
return fmt.Errorf("add deny all acl to port group %s: %v", pgName, err)
}
return nil
}
func (c *OVNNbClient) CreateSgBaseACL(sgName, direction string) error {
pgName := GetSgPortGroupName(sgName)
// ingress rule
portDirection := "outport"
dhcpv4UdpSrc, dhcpv4UdpDst := "67", "68"
dhcpv6UdpSrc, dhcpv6UdpDst := "547", "546"
icmpv6Type := "{130, 134, 135, 136}"
// 130 group membership query
// 133 router solicitation
// 134 router advertisement
// 135 neighbor solicitation
// 136 neighbor advertisement
if direction == ovnnb.ACLDirectionFromLport { // egress rule
portDirection = "inport"
dhcpv4UdpSrc, dhcpv4UdpDst = dhcpv4UdpDst, dhcpv4UdpSrc
dhcpv6UdpSrc, dhcpv6UdpDst = dhcpv6UdpDst, dhcpv6UdpSrc
icmpv6Type = "{130, 133, 135, 136}"
}
acls := make([]*ovnnb.ACL, 0)
newACL := func(match string) {
acl, err := c.newACL(pgName, ovnnb.ACLDirectionToLport, util.SecurityGroupBasePriority, match, ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
klog.Errorf("new base ingress acl for security group %s: %v", sgName, err)
return
}
acls = append(acls, acl)
}
// allow arp
allArpMatch := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("arp", "", "", ""),
)
newACL(allArpMatch.String())
// icmpv6
icmpv6Match := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("icmp6.type", "==", icmpv6Type, ""),
NewACLMatch("icmp6.code", "==", "0", ""),
NewACLMatch("ip.ttl", "==", "255", ""),
)
newACL(icmpv6Match.String())
// dhcpv4 offer
dhcpv4Match := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("udp.src", "==", dhcpv4UdpSrc, ""),
NewACLMatch("udp.dst", "==", dhcpv4UdpDst, ""),
NewACLMatch("ip4", "", "", ""),
)
newACL(dhcpv4Match.String())
// dhcpv6 offer
dhcpv6Match := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("udp.src", "==", dhcpv6UdpSrc, ""),
NewACLMatch("udp.dst", "==", dhcpv6UdpDst, ""),
NewACLMatch("ip6", "", "", ""),
)
newACL(dhcpv6Match.String())
// vrrp
vrrpMatch := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("ip.proto", "==", "112", ""),
)
newACL(vrrpMatch.String())
if err := c.CreateAcls(pgName, portGroupKey, acls...); err != nil {
return fmt.Errorf("add ingress acls to port group %s: %v", pgName, err)
}
return nil
}
func (c *OVNNbClient) UpdateSgACL(sg *kubeovnv1.SecurityGroup, direction string) error {
pgName := GetSgPortGroupName(sg.Name)
// clear acl
if err := c.DeleteAcls(pgName, portGroupKey, direction, nil); err != nil {
return fmt.Errorf("delete direction '%s' acls from port group %s: %v", direction, pgName, err)
}
acls := make([]*ovnnb.ACL, 0, 2)
// ingress rule
srcOrDst, portDirection, sgRules := "src", "outport", sg.Spec.IngressRules
if direction == ovnnb.ACLDirectionFromLport { // egress rule
srcOrDst = "dst"
portDirection = "inport"
sgRules = sg.Spec.EgressRules
}
/* create port_group associated acl */
if sg.Spec.AllowSameGroupTraffic {
asName := GetSgV4AssociatedName(sg.Name)
for _, ipSuffix := range []string{"ip4", "ip6"} {
if ipSuffix == "ip6" {
asName = GetSgV6AssociatedName(sg.Name)
}
match := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch(ipSuffix, "", "", ""),
NewACLMatch(ipSuffix+"."+srcOrDst, "==", "$"+asName, ""),
)
acl, err := c.newACL(pgName, direction, util.SecurityGroupAllowPriority, match.String(), ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow acl for security group %s: %v", sg.Name, err)
}
acls = append(acls, acl)
}
}
/* create rule acl */
for _, rule := range sgRules {
acl, err := c.newSgRuleACL(sg.Name, direction, rule)
if err != nil {
klog.Error(err)
return fmt.Errorf("new rule acl for security group %s: %v", sg.Name, err)
}
acls = append(acls, acl)
}
if err := c.CreateAcls(pgName, portGroupKey, acls...); err != nil {
return fmt.Errorf("add acl to port group %s: %v", pgName, err)
}
return nil
}
func (c *OVNNbClient) UpdateLogicalSwitchACL(lsName string, subnetAcls []kubeovnv1.ACL) error {
if err := c.DeleteAcls(lsName, logicalSwitchKey, "", map[string]string{"subnet": lsName}); err != nil {
return fmt.Errorf("delete subnet acls from %s: %v", lsName, err)
}
if len(subnetAcls) == 0 {
return nil
}
acls := make([]*ovnnb.ACL, 0, len(subnetAcls))
options := func(acl *ovnnb.ACL) {
if acl.ExternalIDs == nil {
acl.ExternalIDs = make(map[string]string)
}
acl.ExternalIDs["subnet"] = lsName
}
/* recreate logical switch acl */
for _, subnetACL := range subnetAcls {
acl, err := c.newACL(lsName, subnetACL.Direction, strconv.Itoa(subnetACL.Priority), subnetACL.Match, subnetACL.Action, options)
if err != nil {
klog.Error(err)
return fmt.Errorf("new acl for logical switch %s: %v", lsName, err)
}
acls = append(acls, acl)
}
if err := c.CreateAcls(lsName, logicalSwitchKey, acls...); err != nil {
return fmt.Errorf("add acls to logical switch %s: %v", lsName, err)
}
return nil
}
// UpdateACL update acl
func (c *OVNNbClient) UpdateACL(acl *ovnnb.ACL, fields ...interface{}) error {
if acl == nil {
return fmt.Errorf("address_set is nil")
}
op, err := c.Where(acl).Update(acl, fields...)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for updating acl with 'direction %s priority %d match %s': %v", acl.Direction, acl.Priority, acl.Match, err)
}
if err = c.Transact("acl-update", op); err != nil {
return fmt.Errorf("update acl with 'direction %s priority %d match %s': %v", acl.Direction, acl.Priority, acl.Match, err)
}
return nil
}
// SetLogicalSwitchPrivate will drop all ingress traffic except allow subnets, same subnet and node subnet
func (c *OVNNbClient) SetLogicalSwitchPrivate(lsName, cidrBlock, nodeSwitchCIDR string, allowSubnets []string) error {
// clear acls
if err := c.DeleteAcls(lsName, logicalSwitchKey, "", nil); err != nil {
return fmt.Errorf("clear logical switch %s acls: %v", lsName, err)
}
acls := make([]*ovnnb.ACL, 0)
/* default drop acl */
allIPMatch := NewACLMatch("ip", "", "", "")
options := func(acl *ovnnb.ACL) {
acl.Name = &lsName
acl.Log = true
acl.Severity = &ovnnb.ACLSeverityWarning
}
defaultDropACL, err := c.newACL(lsName, ovnnb.ACLDirectionToLport, util.DefaultDropPriority, allIPMatch.String(), ovnnb.ACLActionDrop, options)
if err != nil {
klog.Error(err)
return fmt.Errorf("new default drop ingress acl for logical switch %s: %v", lsName, err)
}
acls = append(acls, defaultDropACL)
nodeSubnetACLFunc := func(protocol, ipSuffix string) error {
for _, nodeCidr := range strings.Split(nodeSwitchCIDR, ",") {
// skip different address family
if protocol != util.CheckProtocol(nodeCidr) {
continue
}
match := NewACLMatch(ipSuffix+".src", "==", nodeCidr, "")
acl, err := c.newACL(lsName, ovnnb.ACLDirectionToLport, util.NodeAllowPriority, match.String(), ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
return fmt.Errorf("new node subnet ingress acl for logical switch %s: %v", lsName, err)
}
acls = append(acls, acl)
}
return nil
}
allowSubnetACLFunc := func(protocol, ipSuffix, cidr string) error {
for _, allowSubnet := range allowSubnets {
subnet := strings.TrimSpace(allowSubnet)
// skip empty subnet
if len(subnet) == 0 {
continue
}
// skip different address family
if util.CheckProtocol(subnet) != protocol {
continue
}
match := NewOrACLMatch(
NewAndACLMatch(
NewACLMatch(ipSuffix+".src", "==", cidr, ""),
NewACLMatch(ipSuffix+".dst", "==", subnet, ""),
),
NewAndACLMatch(
NewACLMatch(ipSuffix+".src", "==", subnet, ""),
NewACLMatch(ipSuffix+".dst", "==", cidr, ""),
),
)
acl, err := c.newACL(lsName, ovnnb.ACLDirectionToLport, util.SubnetAllowPriority, match.String(), ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
return fmt.Errorf("new allow subnet ingress acl for logical switch %s: %v", lsName, err)
}
acls = append(acls, acl)
}
return nil
}
for _, cidr := range strings.Split(cidrBlock, ",") {
protocol := util.CheckProtocol(cidr)
ipSuffix := "ip4"
if protocol == kubeovnv1.ProtocolIPv6 {
ipSuffix = "ip6"
}
/* same subnet acl */
sameSubnetMatch := NewAndACLMatch(
NewACLMatch(ipSuffix+".src", "==", cidr, ""),
NewACLMatch(ipSuffix+".dst", "==", cidr, ""),
)
sameSubnetACL, err := c.newACL(lsName, ovnnb.ACLDirectionToLport, util.SubnetAllowPriority, sameSubnetMatch.String(), ovnnb.ACLActionAllowRelated)
if err != nil {
klog.Error(err)
return fmt.Errorf("new same subnet ingress acl for logical switch %s: %v", lsName, err)
}
acls = append(acls, sameSubnetACL)
// node subnet acl
if err := nodeSubnetACLFunc(protocol, ipSuffix); err != nil {
klog.Error(err)
return err
}
// allow subnet acl
if err := allowSubnetACLFunc(protocol, ipSuffix, cidr); err != nil {
klog.Error(err)
return err
}
}
if err := c.CreateAcls(lsName, logicalSwitchKey, acls...); err != nil {
klog.Error(err)
return fmt.Errorf("add ingress acls to logical switch %s: %v", lsName, err)
}
return nil
}
func (c *OVNNbClient) SetACLLog(pgName string, logEnable, isIngress bool) error {
direction := ovnnb.ACLDirectionToLport
portDirection := "outport"
if !isIngress {
direction = ovnnb.ACLDirectionFromLport
portDirection = "inport"
}
// match all traffic to or from pgName
allIPMatch := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("ip", "", "", ""),
)
acl, err := c.GetACL(pgName, direction, util.IngressDefaultDrop, allIPMatch.String(), true)
if err != nil {
klog.Error(err)
return err
}
if acl == nil {
return nil // skip if acl not found
}
if acl.Log == logEnable {
return nil
}
acl.Log = logEnable
err = c.UpdateACL(acl, &acl.Log)
if err != nil {
klog.Error(err)
return fmt.Errorf("update acl: %v", err)
}
return nil
}
// CreateAcls create several acl once
// parentType is 'ls' or 'pg'
func (c *OVNNbClient) CreateAcls(parentName, parentType string, acls ...*ovnnb.ACL) error {
ops, err := c.CreateAclsOps(parentName, parentType, acls...)
if err != nil {
klog.Error(err)
return err
}
if err = c.Transact("acls-add", ops); err != nil {
return fmt.Errorf("add acls to type %s %s: %v", parentType, parentName, err)
}
return nil
}
func (c *OVNNbClient) CreateBareACL(parentName, direction, priority, match, action string) error {
acl, err := c.newACL(parentName, direction, priority, match, action)
if err != nil {
klog.Error(err)
return fmt.Errorf("new acl direction %s priority %s match %s action %s: %v", direction, priority, match, action, err)
}
op, err := c.ovsDbClient.Create(acl)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for creating acl direction %s priority %s match %s action %s: %v", direction, priority, match, action, err)
}
if err = c.Transact("acl-create", op); err != nil {
return fmt.Errorf("create acl direction %s priority %s match %s action %s: %v", direction, priority, match, action, err)
}
return nil
}
// DeleteAcls delete several acl once,
// delete to-lport and from-lport direction acl when direction is empty, otherwise one-way
// parentType is 'ls' or 'pg'
func (c *OVNNbClient) DeleteAcls(parentName, parentType, direction string, externalIDs map[string]string) error {
ops, err := c.DeleteAclsOps(parentName, parentType, direction, externalIDs)
if err != nil {
klog.Error(err)
return err
}
if err = c.Transact("acls-del", ops); err != nil {
return fmt.Errorf("del acls from type %s %s: %v", parentType, parentName, err)
}
return nil
}
func (c *OVNNbClient) DeleteACL(parentName, parentType, direction, priority, match string) error {
acl, err := c.GetACL(parentName, direction, priority, match, true)
if err != nil {
klog.Error(err)
return err
}
if acl == nil {
return nil // skip if acl not exist
}
// the acls column has a strong reference to the ACL table, so there is no need to delete the ACL
var removeACLOp []ovsdb.Operation
if parentType == portGroupKey { // remove acl from port group
removeACLOp, err = c.portGroupUpdateACLOp(parentName, []string{acl.UUID}, ovsdb.MutateOperationDelete)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for deleting acl from port group %s: %v", parentName, err)
}
} else { // remove acl from logical switch
removeACLOp, err = c.logicalSwitchUpdateACLOp(parentName, []string{acl.UUID}, ovsdb.MutateOperationDelete)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for deleting acl from logical switch %s: %v", parentName, err)
}
}
if err = c.Transact("acls-del", removeACLOp); err != nil {
klog.Error(err)
return fmt.Errorf("del acls from type %s %s: %v", parentType, parentName, err)
}
return nil
}
// GetACL get acl by direction, priority and match,
// be consistent with ovn-nbctl which direction, priority and match determine one acl in port group or logical switch
func (c *OVNNbClient) GetACL(parent, direction, priority, match string, ignoreNotFound bool) (*ovnnb.ACL, error) {
// this is necessary because may exist same direction, priority and match acl in different port group or logical switch
if len(parent) == 0 {
return nil, fmt.Errorf("the parent name is required")
}
ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
defer cancel()
intPriority, _ := strconv.Atoi(priority)
aclList := make([]ovnnb.ACL, 0)
if err := c.ovsDbClient.WhereCache(func(acl *ovnnb.ACL) bool {
return len(acl.ExternalIDs) != 0 && acl.ExternalIDs[aclParentKey] == parent && acl.Direction == direction && acl.Priority == intPriority && acl.Match == match
}).List(ctx, &aclList); err != nil {
return nil, fmt.Errorf("get acl with 'parent %s direction %s priority %s match %s': %v", parent, direction, priority, match, err)
}
// not found
if len(aclList) == 0 {
if ignoreNotFound {
return nil, nil
}
return nil, fmt.Errorf("not found acl with 'parent %s direction %s priority %s match %s'", parent, direction, priority, match)
}
if len(aclList) > 1 {
return nil, fmt.Errorf("more than one acl with same 'parent %s direction %s priority %s match %s'", parent, direction, priority, match)
}
// #nosec G602
return &aclList[0], nil
}
// ListAcls list acls which match the given externalIDs,
// result should include all to-lport and from-lport acls when direction is empty,
// result should include all acls when externalIDs is empty,
// result should include all acls which externalIDs[key] is not empty when externalIDs[key] is ""
// TODO: maybe add other filter conditions(priority or match)
func (c *OVNNbClient) ListAcls(direction string, externalIDs map[string]string) ([]ovnnb.ACL, error) {
ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
defer cancel()
aclList := make([]ovnnb.ACL, 0)
if err := c.WhereCache(aclFilter(direction, externalIDs)).List(ctx, &aclList); err != nil {
klog.Error(err)
return nil, fmt.Errorf("list acls: %v", err)
}
return aclList, nil
}
func (c *OVNNbClient) ACLExists(parent, direction, priority, match string) (bool, error) {
acl, err := c.GetACL(parent, direction, priority, match, true)
return acl != nil, err
}
// newACL return acl with basic information
func (c *OVNNbClient) newACL(parent, direction, priority, match, action string, options ...func(acl *ovnnb.ACL)) (*ovnnb.ACL, error) {
if len(parent) == 0 {
return nil, fmt.Errorf("the parent name is required")
}
if len(direction) == 0 || len(priority) == 0 || len(match) == 0 || len(action) == 0 {
return nil, fmt.Errorf("acl 'direction %s' and 'priority %s' and 'match %s' and 'action %s' is required", direction, priority, match, action)
}
exists, err := c.ACLExists(parent, direction, priority, match)
if err != nil {
klog.Error(err)
return nil, fmt.Errorf("get parent %s acl: %v", parent, err)
}
// found, ignore
if exists {
return nil, nil
}
intPriority, _ := strconv.Atoi(priority)
acl := &ovnnb.ACL{
UUID: ovsclient.NamedUUID(),
Action: action,
Direction: direction,
Match: match,
Priority: intPriority,
ExternalIDs: map[string]string{
aclParentKey: parent,
},
}
for _, option := range options {
option(acl)
}
return acl, nil
}
// newACLWithoutCheck return acl with basic information without check acl exists,
// this would cause duplicated acl, so don't use this function to create acl normally,
// but maybe used for updating network policy acl
func (c *OVNNbClient) newACLWithoutCheck(parent, direction, priority, match, action string, options ...func(acl *ovnnb.ACL)) (*ovnnb.ACL, error) {
if len(parent) == 0 {
return nil, fmt.Errorf("the parent name is required")
}
if len(direction) == 0 || len(priority) == 0 || len(match) == 0 || len(action) == 0 {
return nil, fmt.Errorf("acl 'direction %s' and 'priority %s' and 'match %s' and 'action %s' is required", direction, priority, match, action)
}
intPriority, _ := strconv.Atoi(priority)
acl := &ovnnb.ACL{
UUID: ovsclient.NamedUUID(),
Action: action,
Direction: direction,
Match: match,
Priority: intPriority,
ExternalIDs: map[string]string{
aclParentKey: parent,
},
}
for _, option := range options {
option(acl)
}
return acl, nil
}
// createSgRuleACL create security group rule acl
func (c *OVNNbClient) newSgRuleACL(sgName, direction string, rule *kubeovnv1.SgRule) (*ovnnb.ACL, error) {
ipSuffix := "ip4"
if rule.IPVersion == "ipv6" {
ipSuffix = "ip6"
}
pgName := GetSgPortGroupName(sgName)
// ingress rule
srcOrDst, portDirection := "src", "outport"
if direction == ovnnb.ACLDirectionFromLport { // egress rule
srcOrDst = "dst"
portDirection = "inport"
}
ipKey := ipSuffix + "." + srcOrDst
/* match all traffic to or from pgName */
allIPMatch := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch(ipSuffix, "", "", ""),
)
/* allow allowed ip traffic */
// type address
allowedIPMatch := NewAndACLMatch(
allIPMatch,
NewACLMatch(ipKey, "==", rule.RemoteAddress, ""),
)
// type securityGroup
remotePgName := GetSgV4AssociatedName(rule.RemoteSecurityGroup)
if rule.IPVersion == "ipv6" {
remotePgName = GetSgV6AssociatedName(rule.RemoteSecurityGroup)
}
if rule.RemoteType == kubeovnv1.SgRemoteTypeSg {
allowedIPMatch = NewAndACLMatch(
allIPMatch,
NewACLMatch(ipKey, "==", "$"+remotePgName, ""),
)
}
/* allow layer 4 traffic */
// allow all layer 4 traffic
match := allowedIPMatch
switch rule.Protocol {
case kubeovnv1.ProtocolICMP:
match = NewAndACLMatch(
allowedIPMatch,
NewACLMatch("icmp4", "", "", ""),
)
if ipSuffix == "ip6" {
match = NewAndACLMatch(
allowedIPMatch,
NewACLMatch("icmp6", "", "", ""),
)
}
case kubeovnv1.ProtocolTCP, kubeovnv1.ProtocolUDP:
match = NewAndACLMatch(
allowedIPMatch,
NewACLMatch(string(rule.Protocol)+".dst", "<=", strconv.Itoa(rule.PortRangeMin), strconv.Itoa(rule.PortRangeMax)),
)
}
action := ovnnb.ACLActionDrop
if rule.Policy == kubeovnv1.PolicyAllow {
action = ovnnb.ACLActionAllowRelated
}
highestPriority, _ := strconv.Atoi(util.SecurityGroupHighestPriority)
acl, err := c.newACL(pgName, direction, strconv.Itoa(highestPriority-rule.Priority), match.String(), action)
if err != nil {
klog.Error(err)
return nil, fmt.Errorf("new security group acl for port group %s: %v", pgName, err)
}
return acl, nil
}
func newNetworkPolicyACLMatch(pgName, asAllowName, asExceptName, protocol, direction string, npp []netv1.NetworkPolicyPort, namedPortMap map[string]*util.NamedPortInfo) []string {
ipSuffix := "ip4"
if protocol == kubeovnv1.ProtocolIPv6 {
ipSuffix = "ip6"
}
// ingress rule
srcOrDst, portDirection := "src", "outport"
if direction == ovnnb.ACLDirectionFromLport { // egress rule
srcOrDst = "dst"
portDirection = "inport"
}
ipKey := ipSuffix + "." + srcOrDst
// match all traffic to or from pgName
allIPMatch := NewAndACLMatch(
NewACLMatch(portDirection, "==", "@"+pgName, ""),
NewACLMatch("ip", "", "", ""),
)
allowedIPMatch := NewAndACLMatch(
allIPMatch,
NewACLMatch(ipKey, "==", "$"+asAllowName, ""),
NewACLMatch(ipKey, "!=", "$"+asExceptName, ""),
)
matches := make([]string, 0)
// allow allowed ip traffic but except
if len(npp) == 0 {
return []string{allowedIPMatch.String()}
}
for _, port := range npp {
protocol := strings.ToLower(string(*port.Protocol))
// allow all tcp or udp traffic
if port.Port == nil {
allLayer4Match := NewAndACLMatch(
allowedIPMatch,
NewACLMatch(protocol, "", "", ""),
)
matches = append(matches, allLayer4Match.String())
continue
}
// allow one tcp or udp port traffic
if port.EndPort == nil {
tcpKey := protocol + ".dst"
var portID int32
if port.Port.Type == intstr.Int {
portID = port.Port.IntVal
} else if namedPortMap != nil {
_, ok := namedPortMap[port.Port.StrVal]
if !ok {
// for cyclonus network policy test case 'should allow ingress access on one named port'
// this case expect all-deny if no named port defined
klog.Errorf("no named port with name %s found ", port.Port.StrVal)
} else {
portID = namedPortMap[port.Port.StrVal].PortID
}
}
oneTCPMatch := NewAndACLMatch(
allowedIPMatch,
NewACLMatch(tcpKey, "==", fmt.Sprintf("%d", portID), ""),
)
matches = append(matches, oneTCPMatch.String())