diff --git a/KittenOS/README.md b/KittenOS/README.md
index ec28a09..7c4c2aa 100644
--- a/KittenOS/README.md
+++ b/KittenOS/README.md
@@ -24,13 +24,12 @@ Due to how KittenOS's security model works, you have to initialise the library i
 
 ```
 local minitel = neo.requireAccess("x.svc.minitel","minitel daemon access")
-local computer = neo.requireAccess("k.computer","pushing packets")
 local event = require("event")(neo)
 
-local net = require("net")(event,computer,minitel)
+local net = require("net")(event,minitel)
 ```
 
-This gives access to the event API, computer API and Minitel service to the net library.
+This gives access to the event API and Minitel service to the net library.
 
 ### API
 
@@ -42,7 +41,7 @@ Being a direct port of the OpenOS version, the API is the same.
 
 *net.usend(host, port, data, pid)* - Sends an unreliable packet to *host* on *port* containing *data*, optionally with the packet ID *pid*.
 
-*net.rsend(host, port, data)* - Sends a reliable packet to *host* on *port* containing *data*.
+*net.rsend(host, port, data, block)* - Sends a reliable packet to *host* on *port* containing *data*. If *block* is true, don't wait for a reply.
 
 #### Layer 4
 
diff --git a/KittenOS/libs/net.lua b/KittenOS/libs/net.lua
index 619d939..d3183d4 100644
--- a/KittenOS/libs/net.lua
+++ b/KittenOS/libs/net.lua
@@ -1,6 +1,8 @@
-function returnNet(event,computer,minitel)
+function returnNet(event,minitel)
 
 local dbug = false
+local computer = {}
+computer.uptime = os.uptime
 
 function print(...)
  if dbug then
@@ -49,9 +51,10 @@ function net.usend(to,port,data,npID)
  minitel.sendPacket(0,to,port,data,npID)
 end
 
-function net.rsend(to,port,data)
+function net.rsend(to,port,data,block)
  local pid, stime = net.genPacketID(), computer.uptime() + net.streamdelay
- computer.pushSignal("net_send",1,to,port,data,pid)
+ minitel.sendPacket(1,to,port,data,pid)
+ if block then return pid end
  repeat
   _,rpid = svcpull("net_ack")
  until rpid == pid or computer.uptime() > stime
@@ -117,7 +120,7 @@ local function socket(addr,port,sclose) -- todo, add remote closing of sockets
 end
 
 function net.open(to,port)
- net.rsend(to,port,"openstream")
+ if not net.rsend(to,port,"openstream") then return false, "no ack from host" end
  local st = computer.uptime()+net.streamdelay
  local est = false
  while true do