[app][inetsrv] add tftp server.

app/inetsrv/tftp.h

 /*
- * Copyright (c) 2015 Travis Geiselbrecht
+ * Copyright (c) 2015 Carlos Pizano-Uribe <cpu@chromium.org>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files
  * (the "Software"), to deal in the Software without restriction,
  * including without limitation the rights to use, copy, modify, merge,
  * publish, distribute, sublicense, and/or sell copies of the Software,
  * and to permit persons to whom the Software is furnished to do so,
  * subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
+
 #pragma once
 
-#include <platform/bcm2835.h>
+typedef int (*tftp_callback_t)(void *data, size_t len, void *arg);
 
-#define GICBASE(n)  (CPUPRIV_BASE_PHYS)
-#define GICC_OFFSET (0x0100)
-#define GICD_OFFSET (0x1000)
+int tftp_server_init(void *arg);
 
+int tftp_set_write_client(const char* file_name, tftp_callback_t cb, void* arg);