Parse PCAP files into dump978 format.

tools/parse_pcap.go

@@ -0,0 +1,57 @@
+/*
+	Copyright (c) 2018 Christopher Young
+	Distributable under the terms of The "BSD New" License
+	that can be found in the LICENSE file, herein included
+	as part of this header.
+
+	parse_pcap.go: Parse pcap captures. Harris format.
+*/
+
+package main
+
+import (
+	"encoding/hex"
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Printf("usage: %s <file1.pcap> [file2.pcap] ...\n", os.Args[0])
+		return
+	}
+
+	for i := 1; i < len(os.Args); i++ {
+		err := parseFile(os.Args[i])
+		if err != nil {
+			fmt.Printf("error parsing file '%s': %s\n", os.Args[i], err.Error())
+		}
+	}
+}
+
+func parseFile(fn string) error {
+	file, err := os.Open(fn)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	wiresharkHeader := make([]byte, 24)
+	// Read the WireShark header. Don't use any of the data.
+	n, err := file.Read(wiresharkHeader)
+	if n < 24 || err != nil {
+		err = fmt.Errorf("couldn't read WireShark header.")
+		return err
+	}
+
+	data := make([]byte, 498)
+	for {
+		n, err = file.Read(data)
+		if n < 498 || err != nil {
+			return nil
+		}
+		fisbData := data[70:494]
+		// Fake FIS-B station header (copy/pasted from Detroit area transmission).
+		fmt.Printf("+3c2643887cdcab80%s;\n", hex.EncodeToString(fisbData))
+	}
+}