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utils.go
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utils.go
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package enforcer
import (
"github.com/aporeto-inc/trireme-lib/collector"
"github.com/aporeto-inc/trireme-lib/enforcer/lookup"
"github.com/aporeto-inc/trireme-lib/enforcer/utils/packet"
"github.com/aporeto-inc/trireme-lib/policy"
)
func (d *Datapath) reportFlow(p *packet.Packet, connection *TCPConnection, sourceID string, destID string, context *PUContext, mode string, plc *policy.FlowPolicy) {
c := &collector.FlowRecord{
ContextID: context.ID,
Source: &collector.EndPoint{
ID: sourceID,
IP: p.SourceAddress.String(),
Port: p.SourcePort,
Type: collector.PU,
},
Destination: &collector.EndPoint{
ID: destID,
IP: p.DestinationAddress.String(),
Port: p.DestinationPort,
Type: collector.PU,
},
Tags: context.Annotations,
Action: plc.Action,
DropReason: mode,
PolicyID: plc.PolicyID,
}
d.collector.CollectFlowEvent(c)
}
func (d *Datapath) reportAcceptedFlow(p *packet.Packet, conn *TCPConnection, sourceID string, destID string, context *PUContext, plc *policy.FlowPolicy) {
if conn != nil {
conn.SetReported(RejectReported)
}
d.reportFlow(p, conn, sourceID, destID, context, "NA", plc)
}
func (d *Datapath) reportRejectedFlow(p *packet.Packet, conn *TCPConnection, sourceID string, destID string, context *PUContext, mode string, plc *policy.FlowPolicy) {
if conn != nil {
conn.SetReported(AcceptReported)
}
if plc == nil {
plc = &policy.FlowPolicy{
Action: policy.Reject,
PolicyID: "",
}
}
d.reportFlow(p, conn, sourceID, destID, context, mode, plc)
}
func (d *Datapath) reportExternalServiceFlow(context *PUContext, flowpolicy *policy.FlowPolicy, app bool, p *packet.Packet) {
src := &collector.EndPoint{
IP: p.SourceAddress.String(),
Port: p.SourcePort,
}
dst := &collector.EndPoint{
IP: p.DestinationAddress.String(),
Port: p.DestinationPort,
}
if flowpolicy == nil {
flowpolicy = &policy.FlowPolicy{
Action: policy.Reject,
ServiceID: "default",
}
}
if app {
src.ID = context.ManagementID
src.Type = collector.PU
dst.ID = flowpolicy.ServiceID
dst.Type = collector.Address
} else {
src.ID = flowpolicy.ServiceID
src.Type = collector.Address
dst.ID = context.ManagementID
dst.Type = collector.PU
}
record := &collector.FlowRecord{
ContextID: context.ID,
Source: src,
Destination: dst,
DropReason: collector.PolicyDrop,
Action: flowpolicy.Action,
Tags: context.Annotations,
PolicyID: flowpolicy.PolicyID,
}
d.collector.CollectFlowEvent(record)
}
func (d *Datapath) reportReverseExternalServiceFlow(context *PUContext, flowpolicy *policy.FlowPolicy, app bool, p *packet.Packet) {
src := &collector.EndPoint{
IP: p.DestinationAddress.String(),
Port: p.DestinationPort,
}
dst := &collector.EndPoint{
IP: p.SourceAddress.String(),
Port: p.SourcePort,
}
if flowpolicy == nil {
flowpolicy = &policy.FlowPolicy{
Action: policy.Reject,
ServiceID: "default",
}
}
if app {
src.ID = context.ManagementID
src.Type = collector.PU
dst.ID = flowpolicy.ServiceID
dst.Type = collector.Address
} else {
src.ID = flowpolicy.ServiceID
src.Type = collector.Address
dst.ID = context.ManagementID
dst.Type = collector.PU
}
record := &collector.FlowRecord{
ContextID: context.ID,
Source: src,
Destination: dst,
DropReason: collector.PolicyDrop,
Action: flowpolicy.Action,
Tags: context.Annotations,
PolicyID: flowpolicy.PolicyID,
}
d.collector.CollectFlowEvent(record)
}
// createRuleDBs creates the database of rules from the policy
func createRuleDBs(policyRules policy.TagSelectorList) (*lookup.PolicyDB, *lookup.PolicyDB) {
acceptRules := lookup.NewPolicyDB()
rejectRules := lookup.NewPolicyDB()
for _, rule := range policyRules {
if rule.Policy.Action&policy.Accept != 0 {
acceptRules.AddPolicy(rule)
} else if rule.Policy.Action&policy.Reject != 0 {
rejectRules.AddPolicy(rule)
} else {
continue
}
}
return acceptRules, rejectRules
}