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Merge pull request #40 from chazlever/avro
Add support for Avro as output format
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,254 @@ | ||
| package iohandlers | ||
|
|
||
| import ( | ||
| "os" | ||
|
|
||
| "github.com/hamba/avro/ocf" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| func init() { | ||
| Initializers["avro"] = toAvroInitializer | ||
| Marshalers["avro"] = toAvro | ||
| Closers["avro"] = toAvroCloser | ||
| } | ||
|
|
||
| var ( | ||
| avroEncoder *ocf.Encoder | ||
| avroData avroDnsSchema | ||
| avroSchema string | ||
| ttl int | ||
| rtype int | ||
| ecsSource int | ||
| ecsScope int | ||
| ) | ||
|
|
||
| // Avro doesn't support unsigned integers so we create a new type for serialization. | ||
| type avroDnsSchema struct { | ||
| Timestamp int64 `avro:"timestamp"` | ||
| Sha256 string `avro:"sha256"` | ||
| Udp bool `avro:"udp"` | ||
| Ipv4 bool `avro:"ipv4"` | ||
| SourceAddress string `avro:"src_address"` | ||
| SourcePort int `avro:"src_port"` | ||
| DestinationAddress string `avro:"dst_address"` | ||
| DestinationPort int `avro:"dst_port"` | ||
| Id int `avro:"id"` | ||
| Rcode int `avro:"rcode"` | ||
| Truncated bool `avro:"truncated"` | ||
| Response bool `avro:"response"` | ||
| RecursionDesired bool `avro:"recursion_desired"` | ||
| Answer bool `avro:"answer"` | ||
| Authority bool `avro:"authority"` | ||
| Additional bool `avro:"additional"` | ||
| Qname string `avro:"qname"` | ||
| Qtype int `avro:"qtype"` | ||
| Ttl *int `avro:"ttl"` | ||
| Rname *string `avro:"rname"` | ||
| Rtype *int `avro:"rtype"` | ||
| Rdata *string `avro:"rdata"` | ||
| EcsClient *string `avro:"ecs_client"` | ||
| EcsSource *int `avro:"ecs_source"` | ||
| EcsScope *int `avro:"ecs_scope"` | ||
| Source *string `avro:"source"` | ||
| Sensor *string `avro:"sensor"` | ||
| } | ||
|
|
||
| func toAvroInitializer() { | ||
| avroSchema = `{ | ||
| "type": "record", | ||
| "name": "DnsSchema", | ||
| "namespace": "org.hamba.avro", | ||
| "fields": [ | ||
| { | ||
| "name": "timestamp", | ||
| "type": "long" | ||
| }, | ||
| { | ||
| "name": "sha256", | ||
| "type": "string" | ||
| }, | ||
| { | ||
| "name": "udp", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "ipv4", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "src_address", | ||
| "type": "string" | ||
| }, | ||
| { | ||
| "name": "src_port", | ||
| "type": "int" | ||
| }, | ||
| { | ||
| "name": "dst_address", | ||
| "type": "string" | ||
| }, | ||
| { | ||
| "name": "dst_port", | ||
| "type": "int" | ||
| }, | ||
| { | ||
| "name": "id", | ||
| "type": "int" | ||
| }, | ||
| { | ||
| "name": "rcode", | ||
| "type": "int" | ||
| }, | ||
| { | ||
| "name": "truncated", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "response", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "recursion_desired", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "answer", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "authority", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "additional", | ||
| "type": "boolean" | ||
| }, | ||
| { | ||
| "name": "qname", | ||
| "type": "string" | ||
| }, | ||
| { | ||
| "name": "qtype", | ||
| "type": "int" | ||
| }, | ||
| { | ||
| "name": "ttl", | ||
| "type": ["null", "int"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "rname", | ||
| "type": ["null", "string"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "rtype", | ||
| "type": ["null", "int"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "rdata", | ||
| "type": ["null", "string"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "ecs_client", | ||
| "type": ["null", "string"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "ecs_source", | ||
| "type": ["null", "int"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "ecs_scope", | ||
| "type": ["null", "int"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "source", | ||
| "type": ["null", "string"], | ||
| "default": null | ||
| }, | ||
| { | ||
| "name": "sensor", | ||
| "type": ["null", "string"], | ||
| "default": null | ||
| } | ||
| ] | ||
| }` | ||
|
|
||
| var err error | ||
| avroEncoder, err = ocf.NewEncoder(avroSchema, os.Stdout, ocf.WithCodec(ocf.Snappy)) | ||
| if err != nil { | ||
| log.Fatalf("Error creating Avro Encoder: %v", err) | ||
| } | ||
| } | ||
|
|
||
| func toAvro(d *DnsSchema) { | ||
| avroData.Timestamp = d.Timestamp | ||
| avroData.Sha256 = d.Sha256 | ||
| avroData.Udp = d.Udp | ||
| avroData.Ipv4 = d.Ipv4 | ||
| avroData.SourceAddress = d.SourceAddress | ||
| avroData.SourcePort = int(d.SourcePort) | ||
| avroData.DestinationAddress = d.DestinationAddress | ||
| avroData.DestinationPort = int(d.DestinationPort) | ||
| avroData.Id = int(d.Id) | ||
| avroData.Rcode = d.Rcode | ||
| avroData.Truncated = d.Truncated | ||
| avroData.Response = d.Response | ||
| avroData.RecursionDesired = d.RecursionDesired | ||
| avroData.Answer = d.Answer | ||
| avroData.Authority = d.Authority | ||
| avroData.Additional = d.Additional | ||
| avroData.Qname = d.Qname | ||
| avroData.Qtype = int(d.Qtype) | ||
| avroData.Ttl = nil | ||
| avroData.Rname = d.Rname | ||
| avroData.Rdata = d.Rdata | ||
| avroData.Rtype = nil | ||
| avroData.EcsClient = d.EcsClient | ||
| avroData.EcsSource = nil | ||
| avroData.EcsScope = nil | ||
| avroData.Source = nil | ||
| avroData.Sensor = nil | ||
|
|
||
| // Handle source and sensor | ||
| if len(d.Source) > 0 { | ||
| avroData.Source = &d.Source | ||
| } | ||
| if len(d.Sensor) > 0 { | ||
| avroData.Sensor = &d.Sensor | ||
| } | ||
|
|
||
| // Handle pointers requiring type conversion | ||
| if d.Ttl != nil { | ||
| ttl = int(*d.Ttl) | ||
| avroData.Ttl = &ttl | ||
| } | ||
| if d.Rtype != nil { | ||
| rtype = int(*d.Rtype) | ||
| avroData.Rtype = &rtype | ||
| } | ||
| if d.EcsSource != nil { | ||
| ecsSource = int(*d.EcsSource) | ||
| avroData.EcsSource = &ecsSource | ||
| } | ||
| if d.EcsScope != nil { | ||
| ecsScope = int(*d.EcsScope) | ||
| avroData.EcsScope = &ecsScope | ||
| } | ||
|
|
||
| err := avroEncoder.Encode(&avroData) | ||
| if err != nil { | ||
| log.Warnf("Error encoding Avro: %v", err) | ||
| } | ||
| } | ||
|
|
||
| func toAvroCloser() { | ||
| avroEncoder.Flush() | ||
| avroEncoder.Close() | ||
| } |
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