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[logs] update packet logs to use gopacket
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lts-po
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Aug 26, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| module main | ||
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| go 1.18 | ||
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| require github.com/spr-networks/sprbus v0.0.0-20220811094515-092f7af34fb2 | ||
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| require ( | ||
| github.com/golang/protobuf v1.5.2 // indirect | ||
| github.com/moby/moby v20.10.17+incompatible // indirect | ||
| golang.org/x/net v0.0.0-20201021035429-f5854403a974 // indirect | ||
| golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 // indirect | ||
| golang.org/x/text v0.3.3 // indirect | ||
| google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect | ||
| google.golang.org/grpc v1.48.0 // indirect | ||
| google.golang.org/protobuf v1.27.1 // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| package main | ||
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| import ( | ||
| "bufio" | ||
| "encoding/json" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
| "os/exec" | ||
| "regexp" | ||
| "strings" | ||
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| "github.com/spr-networks/sprbus" | ||
| ) | ||
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| var ServerEventSock = "/state/plugins/packet_logs/server.sock" | ||
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| var pipeFile = "/state/plugins/packet_logs/ulogd.json" | ||
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| type nftEntry struct { | ||
| //Timestamp time.Time `json:"timestamp"` | ||
| //TODO cannot parse "+0200\"" as | ||
| Timestamp string `json:"timestamp"` | ||
| Action string `json:"action"` | ||
| InterfaceIn string `json:"oob.in"` | ||
| InterfaceOut string `json:"oob.out"` | ||
| } | ||
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| // runs in a thread | ||
| func startUlogd() { | ||
| cmd := exec.Command("ulogd", "-c", "/etc/ulogd.conf") | ||
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| err := cmd.Run() | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| } | ||
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| func sprServer() { | ||
| _, err := sprbus.NewServer(ServerEventSock) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| } | ||
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| func main() { | ||
| log.Println("starting ulogd2...") | ||
| go startUlogd() | ||
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| go sprServer() | ||
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| client, err := sprbus.NewClient(ServerEventSock) | ||
| defer client.Close() | ||
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| if err != nil { | ||
| log.Fatal("err", err) | ||
| } | ||
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| fmt.Println("sprbus client connected") | ||
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| log.Println("open ulogd named pipe for reading") | ||
| file, err := os.OpenFile(pipeFile, os.O_RDONLY, os.ModeNamedPipe) | ||
| if err != nil { | ||
| log.Fatal("open error:", err) | ||
| } | ||
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| reader := bufio.NewReader(file) | ||
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| log.Println("entering main loop") | ||
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| for { | ||
| line, err := reader.ReadBytes('\n') | ||
| if err != nil { | ||
| log.Println("read error:", err) | ||
| continue | ||
| } | ||
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| var logEntry netfilterEntry | ||
| if err := json.Unmarshal(line, &logEntry); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
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| fmt.Printf("## [%v] %v == %v\n", *logEntry.OobPrefix, *logEntry.Timestamp, *logEntry.Action) | ||
| if logEntry.SrcIp != nil && logEntry.DestIp != nil && logEntry.SrcPort != nil && logEntry.DestPort != nil { | ||
| fmt.Printf("## %v:%v -> %v:%v\n", *logEntry.SrcIp, *logEntry.SrcPort, *logEntry.DestIp, *logEntry.DestPort) | ||
| } | ||
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| //action := "" | ||
| /*if logEntry.Action != nil { | ||
| action = *logEntry.Action | ||
| }*/ | ||
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| prefix := "" | ||
| if logEntry.OobPrefix != nil { | ||
| prefix = strings.TrimSpace(strings.ToLower(*logEntry.OobPrefix)) | ||
| } | ||
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| registeredPrefix := regexp.MustCompile(`^(lan|wan|drop):(in|out|forward|input|mac|pfw)$`).MatchString | ||
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| topic := fmt.Sprintf("nft:%s", prefix) | ||
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| if registeredPrefix(prefix) { | ||
| //fmt.Printf("%% publish. #subscribers: %d, hasClients= %v\n", len(server.Subscribers(topic)), hasClients) | ||
| //log.Printf("subscribers: %v == %v\n", topic, server) | ||
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| client.Publish(topic, string(line)) | ||
| } else { | ||
| topic = fmt.Sprintf("nft:ip") | ||
| client.Publish(topic, string(line)) | ||
| } | ||
| } | ||
| } |
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