1 files changed, 17 insertions, 0 deletions
diff --git a/src/ip.go b/src/ip.go
new file mode 100644
index 0000000..3137891
--- /dev/null
+++ b/src/ip.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"net"
+)
+
+const (
+	IPv4version   = 4
+	IPv4offsetSrc = 12
+	IPv4offsetDst = IPv4offsetSrc + net.IPv4len
+)
+
+const (
+	IPv6version   = 6
+	IPv6offsetSrc = 8
+	IPv6offsetDst = IPv6offsetSrc + net.IPv6len
+)