fixed wireshark lua script with ethernet tunneling

pointer check @ plain packet

2 files changed, 7 insertions, 3 deletions

diff --git a/plainPacket.cpp b/plainPacket.cpp
index c3aa089..ab9ccea 100644
--- a/plainPacket.cpp
+++ b/plainPacket.cpp
@@ -58,8 +58,12 @@ void PlainPacket::setPayloadType(payload_type_t payload_type)
   if(!payload_type_)
     return;
   
-  if(payload_type == PAYLOAD_TYPE_TUN)
-  {
+  if(payload_type == PAYLOAD_TYPE_TUN) {
+    if(!payload_) {
+      *payload_type_ = PAYLOAD_TYPE_T_HTON(0);
+      return;
+    }
+
     struct ip* hdr = reinterpret_cast<struct ip*>(payload_);
     if(hdr->ip_v == 4)
       *payload_type_ = PAYLOAD_TYPE_T_HTON(PAYLOAD_TYPE_TUN4);
diff --git a/wireshark-lua/satp.lua b/wireshark-lua/satp.lua
index be88557..140f971 100644
--- a/wireshark-lua/satp.lua
+++ b/wireshark-lua/satp.lua
@@ -12,7 +12,7 @@ do
 
  local payload_dissector = {
        [0x0800] = "ip",
-       [0x6558] = "ethernet",
+       [0x6558] = "eth",
        [0x86DD] = "ipv6"
  }