Index: b/nse_nsock.cc
===================================================================
--- a/nse_nsock.cc
+++ b/nse_nsock.cc
@@ -33,7 +33,7 @@
 enum {
   NSOCK_POOL = lua_upvalueindex(1),
   NSOCK_SOCKET = lua_upvalueindex(2), /* nsock socket metatable */
-  PCAP_SOCKET = lua_upvalueindex(3), /* pcap socket metatable */
+  PCAP_SOCKET_NMAP = lua_upvalueindex(3), /* pcap socket metatable */
   THREAD_SOCKETS = lua_upvalueindex(4), /* <Thread, Table of Sockets (keys)> */
   CONNECT_WAITING = lua_upvalueindex(5), /* Threads waiting to lock */
   KEY_PCAP = lua_upvalueindex(6) /* Keys to pcap sockets */
@@ -969,7 +969,7 @@ static int nsock_gc (lua_State *L)
 }
 
 
-/****************** PCAP_SOCKET ***********************************************/
+/****************** PCAP_SOCKET_NMAP ***********************************************/
 
 static void dnet_to_pcap_device_name (lua_State *L, const char *device)
 {
@@ -1036,7 +1036,7 @@ static int l_pcap_open (lua_State *L)
       nsock_iod_delete(*nsiod, NSOCK_PENDING_ERROR);
       luaL_error(L, "can't open pcap reader on %s", device);
     }
-    lua_pushvalue(L, PCAP_SOCKET);
+    lua_pushvalue(L, PCAP_SOCKET_NMAP);
     lua_setmetatable(L, -2);
     lua_pushvalue(L, 7); /* the pcap socket key */
     lua_pushvalue(L, -2); /* the pcap socket nsiod */
@@ -1144,7 +1144,7 @@ LUALIB_API int luaopen_nsock (lua_State
   /* library upvalues */
   nsock_pool nsp = new_pool(L); /* NSOCK_POOL */
   lua_newtable(L); /* NSOCK_SOCKET */
-  lua_newtable(L); /* PCAP_SOCKET */
+  lua_newtable(L); /* PCAP_SOCKET_NMAP */
   nseU_weaktable(L, 0, MAX_PARALLELISM, "k"); /* THREAD_SOCKETS */
   nseU_weaktable(L, 0, 1000, "k"); /* CONNECT_WAITING */
   nseU_weaktable(L, 0, 0, "v"); /* KEY_PCAP */
@@ -1164,11 +1164,11 @@ LUALIB_API int luaopen_nsock (lua_State
   lua_pop(L, 1); /* NSOCK_SOCKET */
 
   /* Create the nsock pcap metatable */
-  lua_pushvalue(L, top+3); /* PCAP_SOCKET */
+  lua_pushvalue(L, top+3); /* PCAP_SOCKET_NMAP */
   for (i = top+1; i <= top+nupvals; i++) lua_pushvalue(L, i);
   lua_pushcclosure(L, pcap_gc, nupvals);
   lua_setfield(L, top+3, "__gc");
-  lua_pop(L, 1); /* PCAP_SOCKET */
+  lua_pop(L, 1); /* PCAP_SOCKET_NMAP */
 
 #if HAVE_OPENSSL
   /* Set up the SSL certificate userdata code in nse_ssl_cert.cc. */