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Check if we got a file

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maride 2020-12-15 14:58:33 +01:00
parent 1c23ca3859
commit 8a76ed7d99
1 changed files with 5 additions and 0 deletions
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5
file.go
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@ -19,6 +19,11 @@ func registerFileFlags() {
// Opens the PCAP, returns its packets and the link type or an error
func openPCAP() (*gopacket.PacketSource, layers.LinkType, error) {
// Check if we even got a file.
if *filenameFlag == "" {
return nil, 0, fmt.Errorf("missing file to analyze. Please specifiy it with --file")
}
// Open specified file
handle, openErr := pcap.OpenOffline(*filenameFlag)
if openErr != nil {