diff --git a/configs/everything.cfg b/configs/everything.cfg
index d7ab9f1..85bee67 100755
--- a/configs/everything.cfg
+++ b/configs/everything.cfg
@@ -11,7 +11,7 @@ modules/lib/print.lua
 modules/drivers/kbd.lua
 modules/lib/cdlib.lua
 modules/lib/relib.lua
-modules/net/copper.lua
+modules/net/ncd.lua
 modules/util/motd.lua
 modules/lib/readline.lua
 modules/lib/shutil.lua
diff --git a/configs/headless.cfg b/configs/headless.cfg
index f0bc9e6..0690330 100755
--- a/configs/headless.cfg
+++ b/configs/headless.cfg
@@ -9,7 +9,7 @@ modules/lib/io.lua
 modules/lib/print.lua
 modules/lib/cdlib.lua
 modules/lib/relib.lua
-modules/net/copper.lua
+modules/net/ncd.lua
 modules/util/motd.lua
 modules/lib/readline.lua
 modules/lib/shutil.lua
diff --git a/configs/minimal.cfg b/configs/minimal.cfg
index b253ee0..db56986 100755
--- a/configs/minimal.cfg
+++ b/configs/minimal.cfg
@@ -11,7 +11,7 @@ modules/lib/print.lua
 modules/drivers/kbd.lua
 modules/lib/cdlib.lua
 modules/lib/relib.lua
-modules/net/copper.lua
+modules/net/ncd.lua
 modules/util/motd.lua
 modules/lib/readline.lua
 modules/lib/shutil.lua
diff --git a/modules/net/ncd.lua b/modules/net/ncd.lua
new file mode 100644
index 0000000..c00ccd3
--- /dev/null
+++ b/modules/net/ncd.lua
@@ -0,0 +1,156 @@
+net = {}
+net.id = computer.address():sub(1,8)
+net.delay = 2
+net.np = 4957
+net.cache = true
+net.cache_time = 16
+net.log = false
+if cdlib and relib then
+spawn("ncd",function() print(pcall(function()
+
+ local olog = log
+ local function log(...)
+  if net.log then
+   for k,v in ipairs({...}) do
+    olog("[ncd] " .. tostring(v))
+   end
+  end
+ end
+
+ local mtab = {} -- modem table
+ local lkr = {} -- LKR cache, contains copper_name = {modem="modem address last received from",addr="address last received from"}
+ local rpackets = {} -- packets that have already been seen
+ local pqueue = {} -- queue for packets to be sent. same format as relib.encode accepts. contains:
+-- packet_id = {
+--  pid = "3 char string of random data, same as packet_id",
+--  addr = "address to send to",
+--  port = #port number, 0-65535,
+--  msg = "the packet data",
+--  wf = "packet ID to wait till ack'd"
+--  at = #attempts,
+--  lst = #time of last attempt (USE UPTIME, NOT os.time() BECAUSE WINDOWS IS DUMB)
+-- }
+
+ for modem in component.list("modem") do
+  mtab[#mtab+1] = modem
+  log("added "..modem)
+  component.invoke(modem,"open",net.np)
+ end
+
+ local function send(addr,msg,hops,src)
+  log("sending packet "..msg.." to "..addr)
+  local src=src or net.id
+  local hops=hops or 0
+  if lkr[addr] and net.cache then
+   component.invoke(lkr[addr].modem,"send",lkr[addr].addr,net.np,"copper",cdlib.encode(hops,src,addr,msg))
+  else
+   for _,modem in ipairs(mtab) do
+--    log(modem,"broadcast",net.np,hops,net.id,addr,msg,cdlib.encode(hops,net.id,addr,msg))
+    component.invoke(modem,"broadcast",net.np,"copper",cdlib.encode(hops,net.id,addr,msg))
+   end
+  end
+ end
+ local function enqueue(addr,port,msg,waitfor)
+  local qp = {}
+  qp.msg = msg
+  qp.addr = addr
+  qp.port = port
+  qp.wf = waitfor
+  qp.pid = os.gensalt(3)
+  qp.at = 0
+  qp.pt = 1
+  qp.lst = 0
+  pqueue[qp.pid] = qp
+  for k,v in pairs(qp) do log(k.." = "..tostring(v)) end
+  return qp.pid
+ end
+ net.send = enqueue
+
+ local function ppacket(hops,src,dst,data)
+  if not rpackets[src..dst..data] then
+   if dst == net.id then
+    log("packet addressed here")
+    event.push("net_rmsg",src,data)
+    local pd = relib.decode(data)
+    log(pd)
+    if pd then
+     log("valid relib packet")
+     for k,v in pairs(pd) do log(k.." = "..v) end
+     if pd.port and pd.pid and pd.at and pd.pt then
+      if pd.pt == 0 then
+       log("unreliable packet")
+       event.push("net_msg",src,pd.port,pd.msg)
+      elseif pd.pt == 1 then
+       log("reliable packet, sending ack")
+       event.push("net_msg",src,pd.port,pd.msg)
+       pd.pt = 2
+       pd.addr = src
+       pd.lst = 0
+       pd.msg = ""
+       pd.unreliable=true
+       pqueue[pd.pid] = pd
+       for k,v in pairs(pqueue[pd.pid]) do log(k.." = "..tostring(v)) end
+      elseif pd.pt == 2 then
+       log("ack packet: "..pd.pid)
+       pqueue[pd.pid] = nil
+      end
+     end
+    end
+   elseif src ~= net.id then
+    if hops < 255 then
+     send(dst,data,hops+1,src)
+    end
+   end
+   rpackets[src..dst..data] = computer.uptime()
+  end
+ end
+
+ while true do
+  local ev = {event.pull()}
+
+  if ev[1] == "rsendmsg" or ev[1] == "sendmsg" or ev[1] == "modem_message" then
+--   log(table.unpack(ev))
+  end
+
+  if ev[1] == "rsendmsg" then
+   send(ev[2],ev[3])
+  elseif ev[1] == "sendmsg" then
+   table.remove(ev,1)
+   enqueue(table.unpack(ev))
+  elseif ev[1] == "modem_message" and ev[4] == net.np and ev[6] == "copper" then
+   local hops,src,dst,data = cdlib.decode(ev[7])
+   if hops and src and dst and data then
+    if lkr[src] ~= ev[3] then
+     log("lkr["..tostring(src).."] = "..tostring(ev[3]))
+     lkr[src] = {modem=ev[2],addr=ev[3],time=computer.uptime()}
+    end
+    ppacket(hops,src,dst,data)
+   end
+  end
+
+  for k,v in pairs(pqueue) do
+   if computer.uptime() > v.lst+net.delay and pqueue[v.wf] == nil then
+    send(v.addr,relib.encode(v))
+    v.lst = computer.uptime()
+    v.at = v.at+1
+    if v.at > 254 then
+     pqueue[k] = nil
+    end
+    if v.unreliable then pqueue[k] = nil end
+   end
+  end
+
+  for k,v in pairs(lkr) do
+   if computer.uptime() > v.time+net.cache_time then
+    lkr[k] = nil
+   end
+  end
+  for k,v in pairs(rpackets) do
+   if computer.uptime() > v+net.cache_time then
+    rpackets[k] = nil
+   end
+  end
+
+ end
+end)) end)
+end