From 1a8c22e90db6471c278a44e92fcc06420ebff2a6 Mon Sep 17 00:00:00 2001
From: Simon Whitehead <chemnova@gmail.com>
Date: Wed, 5 Nov 2014 11:30:06 +1100
Subject: [PATCH] Added const for default packet size

---
 fastping.go | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/fastping.go b/fastping.go
index 48a42d7..5ead15f 100644
--- a/fastping.go
+++ b/fastping.go
@@ -47,7 +47,12 @@ import (
 	"time"
 )
 
+const TimeSliceLengh = 8
+
 func byteSliceOfSize(n int) []byte {
+	if n == 0 {
+		n = TimeSliceLengh // if its 0 .. default it to 8
+	}
 	b := make([]byte, n)
 	for i := 0; i < len(b); i++ {
 		b[i] = 1
@@ -134,7 +139,7 @@ func NewPinger() *Pinger {
 		addrs:   make(map[string]*net.IPAddr),
 		hasIPv4: false,
 		hasIPv6: false,
-		Size:    64,
+		Size:    TimeSliceLengh,
 		MaxRTT:  time.Second,
 		OnRecv:  nil,
 		OnIdle:  nil,
@@ -409,7 +414,7 @@ func (p *Pinger) sendICMP(conn, conn6 *net.IPConn) (map[string]*net.IPAddr, erro
 			Type: typ, Code: 0,
 			Body: &icmpEcho{
 				ID: p.id, Seq: p.seq,
-				Data: append(t, byteSliceOfSize(p.Size-len(t))...),
+				Data: append(t, byteSliceOfSize(p.Size-TimeSliceLengh)...),
 			},
 		}).Marshal()
 		p.mu.Unlock()
@@ -515,7 +520,7 @@ func (p *Pinger) procRecv(recv *packet, queue map[string]*net.IPAddr) {
 	case *icmpEcho:
 		p.mu.Lock()
 		if pkt.ID == p.id && pkt.Seq == p.seq {
-			rtt = time.Since(bytesToTime(pkt.Data[:8]))
+			rtt = time.Since(bytesToTime(pkt.Data[:TimeSliceLengh]))
 		}
 		p.mu.Unlock()
 	default: