From 7c3064fb746daf713c6dc75aaad2d3ba26e0a133 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Fri, 1 Feb 2013 02:23:21 +0000
Subject: send packet works as well

git-svn-id: https://svn.spreadspace.org/avr/trunk@113 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 usb-eth/usb-eth.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

(limited to 'usb-eth')

diff --git a/usb-eth/usb-eth.c b/usb-eth/usb-eth.c
index 59bf963..b0d6eda 100644
--- a/usb-eth/usb-eth.c
+++ b/usb-eth/usb-eth.c
@@ -24,6 +24,7 @@
 #include <avr/wdt.h>
 #include <avr/interrupt.h>
 #include <avr/power.h>
+#include <string.h>
 
 #include "util.h"
 #include "led.h"
@@ -39,6 +40,9 @@
 #include <LUFA/Drivers/USB/USB.h>
 #include "lufa-descriptor-rndis.h"
 
+#define ADAPTER_MAC_ADDR {0x02, 0x00, 0x02, 0x00, 0x02, 0x00}
+#define MY_MAC_ADDR      {0x01, 0x02, 0x03, 0x04, 0x05, 0x06}
+
 /** LUFA RNDIS Class driver interface configuration and state information. This structure is
  *  passed to all RNDIS Class driver functions, so that multiple instances of the same class
  *  within a device can be differentiated from one another.
@@ -62,7 +66,7 @@ USB_ClassInfo_RNDIS_Device_t Ethernet_RNDIS_Interface =
         .NotificationEndpointDoubleBank = false,
 
         .AdapterVendorDescription       = "LUFA RNDIS Adapter",
-        .AdapterMACAddress              = {{0x02, 0x00, 0x02, 0x00, 0x02, 0x00}},
+        .AdapterMACAddress              = {ADAPTER_MAC_ADDR},
       },
   };
 
@@ -80,7 +84,24 @@ void EVENT_USB_Device_ControlRequest(void)
 
 /* end LUFA RNDIS Class driver specific definitions*/
 
-uint8_t recv_buf[1514];
+
+typedef uint8_t mac_addr_t[6];
+typedef struct __attribute__((__packed__))
+{
+  mac_addr_t dest;
+  mac_addr_t src;
+  uint16_t ether_type;
+} ethernet_frame_header_t;
+
+typedef struct {
+  uint8_t data[1550];
+  uint16_t len;
+} ethernet_buf_t;
+
+ethernet_buf_t eth_recv_buf;
+ethernet_frame_header_t* eth_recv_hdr = (ethernet_frame_header_t*)eth_recv_buf.data;
+mac_addr_t my_mac = MY_MAC_ADDR;
+
 
 int main(void)
 {
@@ -97,8 +118,12 @@ int main(void)
     if (RNDIS_Device_IsPacketReceived(&Ethernet_RNDIS_Interface))
     {
       led_on();
-      uint16_t len = sizeof(recv_buf);
-      RNDIS_Device_ReadPacket(&Ethernet_RNDIS_Interface, &recv_buf, &len);
+      RNDIS_Device_ReadPacket(&Ethernet_RNDIS_Interface, eth_recv_buf.data, &(eth_recv_buf.len));
+
+      memcpy(eth_recv_hdr->dest, eth_recv_hdr->src, sizeof(mac_addr_t));
+      memcpy(eth_recv_hdr->src, my_mac, sizeof(mac_addr_t));
+
+      RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface, eth_recv_buf.data, eth_recv_buf.len);
       led_off();
     }
     
-- 
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