commit 2e8b937f0f6b5c2c3bf86661581a85e2e97892b9
author Ningyuan Wang <nywang@google.com> Mon Jan 25 14:15:46 2016 -0800
committer Ningyuan Wang <nywang@google.com> Thu Jan 28 15:10:21 2016 -0800
tree 3694bf12a08a14e73d1df727ef06cc4bed75b7b8
parent 787f45dbfce666afb7da75375b86f28ef4162399

DHCPV4: make and send dhcp packet

This adds two functions.
One is MakeRawPacket(), extracting payload from DHCPMessage
object and filling the IP and UDP headers.

Another is SendRawPacket(), sending the dhcp packet through
raw socket.

Bug: 25642025
TEST=compile and unittest

Change-Id: Ib9efca5d96b768757d26e70119564b98e819bb34

dhcpv4.h

diff --git a/dhcpv4.h b/dhcpv4.h
index f0132c8..6d32e52 100644
--- a/dhcpv4.h
+++ b/dhcpv4.h
@@ -21,12 +21,13 @@
 
 #include <base/macros.h>
 #include <base/strings/stringprintf.h>
+#include <shill/net/byte_string.h>
+#include <shill/net/io_handler_factory_container.h>
+#include <shill/net/sockets.h>
 
 #include "dhcp_client/dhcp.h"
+#include "dhcp_client/dhcp_message.h"
 #include "dhcp_client/event_dispatcher_interface.h"
-#include "shill/net/byte_string.h"
-#include "shill/net/io_handler_factory_container.h"
-#include "shill/net/sockets.h"
 
 namespace dhcp_client {
 
@@ -47,6 +48,12 @@
   void Stop();
 
  private:
+  bool CreateRawSocket();
+  bool MakeRawPacket(const DHCPMessage& message, shill::ByteString* buffer);
+  void OnReadError(const std::string& error_msg);
+  void ParseMessage(shill::InputData* data);
+  bool SendRawPacket(const shill::ByteString& buffer);
+
   // Interface parameters.
   std::string interface_name_;
   shill::ByteString hardware_address_;
@@ -76,9 +83,8 @@
   // Helper class with wrapped socket relavent functions.
   std::unique_ptr<shill::Sockets> sockets_;
 
-  bool CreateRawSocket();
-  void ParseMessage(shill::InputData* data);
-  void OnReadError(const std::string& error_msg);
+  uint32_t from_;
+  uint32_t to_;
 
   DISALLOW_COPY_AND_ASSIGN(DHCPV4);
 };