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[NETOBSERV-44] Consumming goflow2 as a library.
Using goflow2 as a library to directly receive netflow event with the kube-enricher
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package netflow | ||
|
|
||
| import ( | ||
| "context" | ||
| "log" | ||
|
|
||
| goflow2Format "github.com/netsampler/goflow2/format" | ||
| _ "github.com/netsampler/goflow2/format/protobuf" | ||
| "github.com/netsampler/goflow2/utils" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
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| type GoflowDriver struct { | ||
| in chan map[string]interface{} | ||
| } | ||
|
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| func NewDriver(hostname string, port int) *GoflowDriver { | ||
| gf := GoflowDriver{} | ||
| gf.in = make(chan map[string]interface{}) | ||
|
|
||
| go func(in chan map[string]interface{}) { | ||
| ctx := context.Background() | ||
|
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| transporter := NewWrapper(in) | ||
|
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| formatter, err := goflow2Format.FindFormat(ctx, "pb") | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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| sNF := &utils.StateNetFlow{ | ||
| Format: formatter, | ||
| Transport: transporter, | ||
| Logger: logrus.StandardLogger(), | ||
| } | ||
| err = sNF.FlowRoutine(1, hostname, port, false) | ||
| log.Fatal(err) | ||
|
|
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| }(gf.in) | ||
|
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| return &gf | ||
| } | ||
|
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| func (gf *GoflowDriver) Next() (map[string]interface{}, error) { | ||
| msg := <-gf.in | ||
| return msg, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package netflow | ||
|
|
||
| import ( | ||
| "github.com/golang/protobuf/proto" | ||
| pbFormat "github.com/netobserv/goflow2-kube-enricher/pkg/format/pb" | ||
| goflowpb "github.com/netsampler/goflow2/pb" | ||
| ) | ||
|
|
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| // This is en implementation of the goflow2 transport interface | ||
| type TransportWrapper struct { | ||
| c chan map[string]interface{} | ||
| } | ||
|
|
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| func NewWrapper(c chan map[string]interface{}) *TransportWrapper { | ||
| tw := TransportWrapper{c: c} | ||
| return &tw | ||
| } | ||
|
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| func (w *TransportWrapper) Send(key, data []byte) error { | ||
| message := goflowpb.FlowMessage{} | ||
| err := proto.Unmarshal(data, &message) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| renderedMsg, err := pbFormat.RenderMessage(message) | ||
| if err == nil { | ||
| w.c <- renderedMsg | ||
| } | ||
| return err | ||
| } |
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