diff --git a/lib/net/http.rb b/lib/net/http.rb
index 4ae5349202..104dca9681 100644
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@@ -3,7 +3,7 @@
 = net/http.rb
 
 maintained by Minero Aoki <aamine@dp.u-netsurf.ne.jp>
-This file is derived from http-access.rb
+This file is derived from "http-access.rb".
 
 This library is distributed under the terms of the Ruby license.
 You can freely distribute/modify this library.
@@ -22,7 +22,7 @@ class HTTPBadResponse < HTTPError; end
 
 =begin
 
-= HTTP class
+= class HTTP
 
 == Class Methods
 
@@ -62,39 +62,58 @@ class HTTPBadResponse < HTTPError; end
 
 
     def get( path, u_header = nil, ret = '' )
-      header = connecting {
+      u_header ||= {}
+      header = connecting( u_header ) {
         @command.get ret, edit_path(path), u_header
       }
+
       return header, ret
     end
 
     def head( path, u_header = nil )
-      connecting {
+      u_header ||= {}
+      header = connecting( u_header ) {
         @command.head edit_path(path), u_header
       }
+
+      header
     end
 
 
     private
 
 
-    def connecting
-      if @socket.closed? then
+    # called when connecting
+    def do_finish
+      unless @socket.closed? then
+        @command.head '/', { 'Connection' => 'Close' }
+      end
+    end
+
+    def connecting( u_header )
+      u_header = procheader( u_header )
+
+      if not @socket then
+        u_header['Connection'] = 'Close'
+        start
+      elsif @socket.closed? then
         @socket.reopen
       end
-      header = yield
-      @socket.close unless keep_alive? header
 
-      header
+      yield
+
+      unless keep_alive? u_header then
+        @socket.close
+      end
     end
 
     def keep_alive?( header )
-      if str = header[ 'connection' ] then
-        if /\Aconnection:\s*keep-alive/i === str then
+      if str = header['Connection'] then
+        if /\A\s*keep-alive/i === str then
           return true
         end
       else
-        if @http_version == '1.1' then
+        if @command.http_version == '1.1' then
           return true
         end
       end
@@ -102,14 +121,16 @@ class HTTPBadResponse < HTTPError; end
       false
     end
 
-    
-    def do_finish
-      unless @command.error_occured or @socket.closed? then
-        head '/', { 'Connection' => 'Close' }
+    def procheader( h )
+      new = {}
+      h.each do |k,v|
+        arr = k.split('-')
+        arr.each{|i| i.capitalize! }
+        new[ arr.join('-') ] = v
       end
     end
 
-
+    
     def edit_path( path )
       path
     end
@@ -148,7 +169,7 @@ class HTTPBadResponse < HTTPError; end
     end
 
 
-    attr :http_version
+    attr_reader :http_version
 
     def get( ret, path, u_header = nil )
       header = get_response(
@@ -195,12 +216,6 @@ class HTTPBadResponse < HTTPError; end
     private
 
 
-    def do_quit
-      unless @socket.closed? then
-        @socket.close
-      end
-    end
-
     def get_response( line, u_header )
       @socket.writeline line
       write_header u_header
@@ -231,7 +246,7 @@ class HTTPBadResponse < HTTPError; end
               when ?3 then RetryCode
               when ?4 then ServerBusyCode
               when ?5 then FatalErrorCode
-              else UnknownCode
+              else         UnknownCode
               end
       klass.new( status, discrip )
     end
diff --git a/lib/net/protocol.rb b/lib/net/protocol.rb
index aa8a007adf..6d2e34e127 100644
--- a/lib/net/protocol.rb
+++ b/lib/net/protocol.rb
@@ -15,7 +15,7 @@ require 'socket'
 
 module Net
 
-  Version = '1.1.5'
+  Version = '1.1.6'
 
 =begin
 
@@ -100,8 +100,7 @@ Object
           end
           private :connect
             
-          attr :proxyaddr
-          attr :proxyport
+          attr_reader :proxyaddr, :proxyport
         -
         def klass.proxy?
           true
@@ -155,11 +154,8 @@ Object
     end
 
 
-    attr :address
-    attr :port
-
-    attr :command
-    attr :socket
+    attr_reader :address, :port,
+                :command, :socket
 
 
     def start( *args )
@@ -176,23 +172,13 @@ Object
     end
 
     def finish
-      if @command then
-        do_finish
-        disconnect
-      end
+      ret = active?
 
-      if @socket and not @socket.closed? then
-        @socket.close
-        @socket = nil
-      end
+      do_finish if @command
+      disconnect
+      @active = false
 
-      if active? then
-        @active = false
-
-        return true
-      else
-        return false
-      end
+      ret
     end
 
     def active?
@@ -211,6 +197,7 @@ Object
     end
 
     def do_finish
+      @command.quit
     end
 
 
@@ -220,8 +207,10 @@ Object
     end
 
     def disconnect
-      @command.quit
       @command = nil
+      if @socket and not @socket.closed? then
+        @socket.close
+      end
       @socket  = nil
     end
 
@@ -257,27 +246,30 @@ Object
     def initialize( sock )
       @socket = sock
       @error_occured = false
+      @last_reply = nil
     end
 
-    attr :socket, true
-    attr :error_occured
+    attr_reader :socket, :error_occured, :last_reply
+    attr_writer :socket
 
     def quit
       if @socket and not @socket.closed? then
-        begin
-          do_quit
-        ensure
-          @socket.close unless @socket.closed?
-          @socket = nil
-        end
+        do_quit
         @error_occured = false
       end
     end
 
+
     private
 
+    def do_quit
+    end
+
+    # abstract get_reply()
+
     def check_reply( *oks )
-      reply_must( get_reply, *oks )
+      @last_reply = get_reply
+      reply_must( @last_reply, *oks )
     end
 
     def reply_must( rep, *oks )
@@ -310,13 +302,25 @@ Object
 
   class ReplyCode
 
+    class << self
+
+      def error_type( err )
+        @err = err
+      end
+
+      def error!( mes )
+        raise @err, mes
+      end
+
+    end
+        
     def initialize( cod, mes )
       @code = cod
       @msg  = mes
     end
 
-    attr :code
-    attr :msg
+    attr_reader :code, :msg
+
 
     def error!( sending )
       mes = <<MES
@@ -328,42 +332,41 @@ writing string is:
 error message from server is:
 %s
 MES
-      raise self.type::Error,
-        sprintf( mes, @code, Net.quote(sending), Net.quote(@msg) )
+      type.error! sprintf( mes, @code, Net.quote(sending), Net.quote(@msg) )
     end
 
   end
 
   class SuccessCode < ReplyCode
-    Error = ProtoUnknownError
+    error_type ProtoUnknownError
   end
 
   class ContinueCode < SuccessCode
-    Error = ProtoUnknownError
+    error_type ProtoUnknownError
   end
 
   class ErrorCode < ReplyCode
-    Error = ProtocolError
+    error_type ProtocolError
   end
 
   class SyntaxErrorCode < ErrorCode
-    Error = ProtoSyntaxError
+    error_type ProtoSyntaxError
   end
 
   class FatalErrorCode < ErrorCode
-    Error = ProtoFatalError
+    error_type ProtoFatalError
   end
 
   class ServerBusyCode < ErrorCode
-    Error = ProtoServerError
+    error_type ProtoServerError
   end
 
   class RetryCode < ReplyCode
-    Error = ProtoRetryError
+    error_type ProtoRetryError
   end
 
   class UnknownCode < ReplyCode
-    Error = ProtoUnknownError
+    error_type ProtoUnknownError
   end
 
 
@@ -498,7 +501,6 @@ Object
       @socket = TCPsocket.new( @addr, @port )
     end
 
-
     attr :socket, true
 
     def close
@@ -515,14 +517,14 @@ Object
     end
     alias addr address
 
-    attr :port
+    attr_reader :port
 
     def ip_address
       @ipaddr.dup
     end
     alias ipaddr ip_address
 
-    attr :sending
+    attr_reader :sending
 
 
     CRLF    = "\r\n"
diff --git a/lib/net/smtp.rb b/lib/net/smtp.rb
index 4b2986dea2..2c387db43c 100644
--- a/lib/net/smtp.rb
+++ b/lib/net/smtp.rb
@@ -36,7 +36,7 @@ Net::Protocol
   This method opens TCP connection and start SMTP.
   If protocol had been started, do nothing and return false.
 
-: sendmail( mailsrc, from_domain, to_addrs )
+: sendmail( mailsrc, from_addr, to_addrs )
   This method sends 'mailsrc' as mail. SMTPSession read strings
   from 'mailsrc' by calling 'each' iterator, and convert them
   into "\r\n" terminated string when write.
@@ -47,7 +47,7 @@ Net::Protocol
   * Net::ProtoUnknownError: unknown error
   * Net::ProtoServerBusy: temporary error (errno.420/450)
 
-: ready( from_domain, to_addrs ) {|adapter| .... }
+: ready( from_addr, to_addrs ) {|adapter| .... }
   This method stands by the SMTP object for sending mail.
   In the block of this iterator, you can call ONLY 'write' method
   for 'adapter'.
@@ -133,11 +133,11 @@ Net::Command
 
 : mailfrom( from_addr )
   This method sends "MAIL FROM" command.
-  from_addr is your mail address(????@????).
+  from_addr is your mail address (xxxx@xxxx)
 
 : rcpt( to_addrs )
   This method sends "RCPT TO" command.
-  to_addrs is array of mail address(???@???) of destination.
+  to_addrs is array of mail address (xxxx@xxxx) of destination.
 
 : data
   This method sends "DATA" command.