From a29fc154a0f0a7b5f4b73ae8ab9abc1e66b120cd Mon Sep 17 00:00:00 2001
From: XeonSquared <redtailedairways@gmail.com>
Date: Wed, 9 Jan 2019 16:23:30 +1100
Subject: [PATCH] added a terminal server and bad netcat clone

---
 exec/nc.lua         | 16 ++++++++++++++++
 exec/shell.lua      |  6 +++++-
 service/termsrv.lua | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 exec/nc.lua
 create mode 100644 service/termsrv.lua

diff --git a/exec/nc.lua b/exec/nc.lua
new file mode 100644
index 0000000..f4bd0ff
--- /dev/null
+++ b/exec/nc.lua
@@ -0,0 +1,16 @@
+local minitel = require "minitel"
+local tA = {...}
+
+host, port = tA[1], tA[2]
+
+local socket = minitel.open(host,port)
+if not socket then return false end
+local b = ""
+repeat
+ io.write(socket:read("*a"))
+ coroutine.yield()
+ b = io.read(nil,true) or ""
+ if b:len() > 0 then
+  socket:write(b.."\n")
+ end
+until socket.state ~= "open"
diff --git a/exec/shell.lua b/exec/shell.lua
index 1930b7b..4213cfb 100644
--- a/exec/shell.lua
+++ b/exec/shell.lua
@@ -1,7 +1,11 @@
 local shenv = {}
+function shenv.quit()
+ os.setenv("run",nil)
+end
 setmetatable(shenv,{__index=function(_,k) if _G[k] then return _G[k] elseif fs.exists("/boot/exec/"..k..".lua") then return loadfile("/boot/exec/"..k..".lua") end end})
 print(_VERSION)
-while true do
+os.setenv("run",true)
+while os.getenv("run") do
  io.write((os.getenv("PWD") or _VERSION).."> ")
  tResult = {pcall(load(io.read(),"shell","t",shenv))}
  if tResult[1] == true then table.remove(tResult,1) end
diff --git a/service/termsrv.lua b/service/termsrv.lua
new file mode 100644
index 0000000..c5c55cf
--- /dev/null
+++ b/service/termsrv.lua
@@ -0,0 +1,36 @@
+print(pcall(function()
+local minitel = require "minitel"
+local port = 22
+local logfile = "/boot/termsrv.log"
+
+if logfile then
+ local log = io.open(logfile,"a")
+ os.setenv("t",log.fd)
+end
+while true do
+ local sock = minitel.listen(port)
+ print(string.format("[%s] Connection from %s:%d",os.date("%Y-%m-%d %H:%M"),sock.addr,sock.port))
+ os.spawn(function() _G.worked = {pcall(function()
+  local fdi, fdo = io.newfd()
+  function fdo.read(d)
+    return sock:read(d)
+  end
+  function fdo.write(d)
+    return sock:write(d)
+  end
+  function fdo.close()
+   sock:close()
+  end
+  fd[fdi] = fdo
+  os.setenv("t",fdi)
+  sock:write(string.format("Connected to %s on port %d\n",computer.address():sub(1,8),sock.port))
+  local pid = spawnfile("/boot/exec/shell.lua",string.format("shell [%s:%d]",sock.addr,sock.port))
+  repeat
+   coroutine.yield()
+  until sock.state ~= "open" or not tTasks[pid]
+  fdo.close()
+  sock:close()
+  os.kill(pid)
+ end)} end,string.format("remote login [%s:%d]",sock.addr,sock.port))
+end
+end))