From b2d424d6b2b279c828c8f295a8e23fc553093110 Mon Sep 17 00:00:00 2001
From: Nils <nils@byreqz.de>
Date: Fri, 31 Dec 2021 00:37:27 +0100
Subject: [PATCH] fix for empty options

---
 main.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/main.go b/main.go
index f4284ba..f401a2a 100644
--- a/main.go
+++ b/main.go
@@ -89,7 +89,7 @@ func ping(w http.ResponseWriter, req *http.Request) {
   cmdopts := map[string]string{"4": "-4", "6": "-6", "d": "-D", "n": "-n", "v": "-v", "c1": "-c1", "c5": "-c5", "c10": "-c10"}
   var opts []string
   opts = append(opts, "-c10") // add default options
-  if len(geturl) > 3 { 
+  if len(geturl) > 3 && len(geturl[3]) > 0 { 
     options := strings.Split(geturl[3], ",")
     opts = append(opts, parseopts(options, cmdopts)...)
   }
@@ -114,7 +114,7 @@ func mtr(w http.ResponseWriter, req *http.Request) {
   cmdopts := map[string]string{"4": "-4", "6": "-6", "u": "-u", "t": "-T", "e": "-e", "x": "-x", "n": "-n", "b": "-b", "z": "-z", "c1": "-c1", "c5": "-c5", "c10": "-c10"}
   var opts []string
   opts = append(opts, "-r", "-w", "-c10") // add default options
-  if len(geturl) > 3 { 
+  if len(geturl) > 3 && len(geturl[3]) > 0 { 
     options := strings.Split(geturl[3], ",")
     opts = append(opts, parseopts(options, cmdopts)...)
   }
@@ -139,7 +139,7 @@ func traceroute(w http.ResponseWriter, req *http.Request) {
   cmdopts := map[string]string{"4": "-4", "6": "-6", "dnf": "-F", "i": "-I", "t": "-T", "n": "-n", "u": "-U", "ul": "-UL", "d": "-D", "b": "--back"}
   var opts []string
   //opts = append(opts, "-c10") // no default options for traceroute
-  if len(geturl) > 3 { 
+  if len(geturl) > 3 && len(geturl[3]) > 0 { 
     options := strings.Split(geturl[3], ",")
     opts = append(opts, parseopts(options, cmdopts)...)
   }