Add Model#expect, support block at post/pre config

Now we can deal with pager and additional PW prompts, such as 'enable'

Examples in IOS model how to use.

The Telnet implementation is particularly fugly, I just need one line in
'waitfor' to handle pager while waiting for prompt, but couldn't figure
out clean way to do it, so needed to rewrit whole Telnet#waitfor just to
add that line.

1 files changed, 93 insertions, 2 deletions

diff --git a/lib/oxidized/input/telnet.rb b/lib/oxidized/input/telnet.rb
index 0ec08f9..c1afde2 100644
--- a/lib/oxidized/input/telnet.rb
+++ b/lib/oxidized/input/telnet.rb
@@ -10,7 +10,8 @@ module Oxidized
       @timeout = CFG.timeout
       @node.model.cfg['telnet'].each { |cb| instance_exec &cb }
       begin
-        @telnet  = Net::Telnet.new 'Host' => @node.ip, 'Waittime' => @timeout
+        @telnet  = Net::Telnet.new 'Host' => @node.ip, 'Waittime' => @timeout,
+                                   'Model' => @node.model
         expect username
         @telnet.puts @node.auth[:username]
         expect password
@@ -32,6 +33,10 @@ module Oxidized
       end
     end
 
+    def send data
+      @telnet.write data
+    end
+
     private
 
     def expect re
@@ -40,7 +45,7 @@ module Oxidized
 
     def disconnect
       begin
-        @pre_logout.each { |command| cmd(command, nil) }
+        disconnect_cli
         @telnet.close
       rescue Errno::ECONNRESET
       end
@@ -56,3 +61,89 @@ module Oxidized
 
   end
 end
+
+
+class Net::Telnet
+  ## FIXME: we just need 'line = model.expects line' to handle pager
+  ## how to do this, without redefining the whole damn thing
+  def waitfor(options) # :yield: recvdata
+    time_out = @options["Timeout"]
+    waittime = @options["Waittime"]
+    fail_eof = @options["FailEOF"]
+    model    = @options["Model"]
+
+    if options.kind_of?(Hash)
+      prompt   = if options.has_key?("Match")
+                   options["Match"]
+                 elsif options.has_key?("Prompt")
+                   options["Prompt"]
+                 elsif options.has_key?("String")
+                   Regexp.new( Regexp.quote(options["String"]) )
+                 end
+      time_out = options["Timeout"]  if options.has_key?("Timeout")
+      waittime = options["Waittime"] if options.has_key?("Waittime")
+      fail_eof = options["FailEOF"]  if options.has_key?("FailEOF")
+    else
+      prompt = options
+    end
+
+    if time_out == false
+      time_out = nil
+    end
+
+    line = ''
+    buf = ''
+    rest = ''
+    until(prompt === line and not IO::select([@sock], nil, nil, waittime))
+      unless IO::select([@sock], nil, nil, time_out)
+        raise Net::ReadTimeout, "timed out while waiting for more data"
+      end
+      begin
+        c = @sock.readpartial(1024 * 1024)
+        @dumplog.log_dump('<', c) if @options.has_key?("Dump_log")
+        if @options["Telnetmode"]
+          c = rest + c
+          if Integer(c.rindex(/#{IAC}#{SE}/no) || 0) <
+             Integer(c.rindex(/#{IAC}#{SB}/no) || 0)
+            buf = preprocess(c[0 ... c.rindex(/#{IAC}#{SB}/no)])
+            rest = c[c.rindex(/#{IAC}#{SB}/no) .. -1]
+          elsif pt = c.rindex(/#{IAC}[^#{IAC}#{AO}#{AYT}#{DM}#{IP}#{NOP}]?\z/no) ||
+                     c.rindex(/\r\z/no)
+            buf = preprocess(c[0 ... pt])
+            rest = c[pt .. -1]
+          else
+            buf = preprocess(c)
+            rest = ''
+          end
+       else
+         # Not Telnetmode.
+         #
+         # We cannot use preprocess() on this data, because that
+         # method makes some Telnetmode-specific assumptions.
+         buf = rest + c
+         rest = ''
+         unless @options["Binmode"]
+           if pt = buf.rindex(/\r\z/no)
+             buf = buf[0 ... pt]
+             rest = buf[pt .. -1]
+           end
+           buf.gsub!(/#{EOL}/no, "\n")
+         end
+        end
+        @log.print(buf) if @options.has_key?("Output_log")
+        line += buf
+        line = model.expects line
+        line = yield line if block_given?
+        yield buf if block_given?
+      rescue EOFError # End of file reached
+        raise if fail_eof
+        if line == ''
+          line = nil
+          yield nil if block_given?
+        end
+        break
+      end
+    end
+    line
+  end
+end