wip

[oweals/gnunet.git] / src / transport / plugin_transport_wlan.h

diff --git a/src/transport/plugin_transport_wlan.h b/src/transport/plugin_transport_wlan.h
index dc30b5ff3fa506eaef673fa67f551d496c1e288d..3baa4d79d032c7d891e98a314f37d584c60866f6 100644 (file)
--- a/src/transport/plugin_transport_wlan.h
+++ b/src/transport/plugin_transport_wlan.h
@@ -24,53 +24,98 @@
  * @author David Brodski
  */
 
+#ifndef PLUGIN_TRANSPORT_WLAN
+#define PLUGIN_TRANSPORT_WLAN
+
+#include <stdint.h>
 #include "gnunet_common.h"
 
-typedef unsigned int uint32_t;
-typedef unsigned short uint16_t;
 
-/* Wlan IEEE80211 header default */
-static const uint8_t u8aIeeeHeader[] = 
-  {
-    0x08, 0x01, 0x00, 0x00,
-    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0x13, 0x22, 0x33, 0x44, 0x55, 0x66,
-    0x13, 0x22, 0x33, 0x44, 0x55, 0x66,
-    0x10, 0x86,
-  };
+
+struct MacAddress
+{
+  u_int8_t mac[6];
+};
+
+struct Wlan_Helper_Control_Message
+{
+  struct GNUNET_MessageHeader hdr;
+  struct MacAddress mac;
+};
 
 /**
- * Wlan header
+ * Header for messages which need fragmentation
  */
-
-struct IeeeHeader
+struct FragmentationHeader
 {
+
+  struct GNUNET_MessageHeader header;
+
   /**
-   * Wlan flags
+   * ID of message, to distinguish between the messages, picked randomly.
    */
-  uint32_t flags;
-  
+  uint32_t message_id GNUNET_PACKED;
+
   /**
-   * first mac
+   * Offset or number of this fragment, for fragmentation/segmentation (design choice, TBD)
    */
-  uint8_t mac1[6];
-  
+  uint16_t fragment_off_or_num GNUNET_PACKED;
+
   /**
-   * second mac
+   * CRC of fragment (for error checking)
    */
-  uint8_t mac2[6];
-  
+  uint16_t message_crc GNUNET_PACKED;
+
+// followed by payload
+
+};
+
+/**
+ * Header for messages which need fragmentation
+ */
+struct WlanHeader
+{
+
+  struct GNUNET_MessageHeader header;
+
   /**
-   * third mac
+   * checksum/error correction
    */
-  uint8_t mac3[6];
-  
+  uint32_t crc GNUNET_PACKED;
+
   /**
-   * Wlan flags2
+   * To whom are we talking to (set to our identity
+   * if we are still waiting for the welcome message)
    */
-  uint16_t flags2;
+  struct GNUNET_PeerIdentity target;
+
+// followed by payload
+
 };
 
+/* Wlan IEEE80211 header default */
+//Informations (in German) http://www.umtslink.at/content/WLAN_macheader-196.html
+static const uint8_t u8aIeeeHeader[] = 
+  {
+    0x08, 0x01, // Frame Control 0x08= 00001000 -> | b1,2 = 0 -> Version 0;
+                //      b3,4 = 10 -> Data; b5-8 = 0 -> Normal Data
+               //      0x01 = 00000001 -> | b1 = 1 to DS; b2 = 0 not from DS;
+    0x00, 0x00, // Duration/ID
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // mac1 - in this case receiver
+    0x13, 0x22, 0x33, 0x44, 0x55, 0x66, // mac2 - in this case sender
+    0x13, 0x22, 0x33, 0x44, 0x55, 0x66, // mac3 - in this case bssid
+    0x10, 0x86, //Sequence Control
+  };
+
+// gnunet bssid
+static const struct MacAddress mac_bssid =
+  {  { 0x13, 0x22, 0x33, 0x44, 0x55, 0x66 } } ; 
+
+// broadcast mac
+static const struct MacAddress bc_all_mac =
+  { { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF } };
+
+
 /* this is the template radiotap header we send packets out with */
 
 static const uint8_t u8aRadiotapHeader[] = 
@@ -87,6 +132,47 @@ static const uint8_t u8aRadiotapHeader[] =
     0x01, // <-- antenna
 };
 
+struct Radiotap_Send
+{
+  /**
+     * wlan send rate
+     */
+    uint8_t rate;
+
+    /**
+     * antenna
+     */
+    uint8_t antenna;
+
+    /**
+     * Transmit power expressed as unitless distance from max power set at factory calibration.
+     * 0 is max power. Monotonically nondecreasing with lower power levels.
+     */
+
+    uint16_t tx_power;
+};
+
+// bit field defines for ri_present
+
+#define has_noise 1
+#define has_power 2
+#define has_channel 4
+
+/**
+ * struct to represent infos gathered form the radiotap fields
+ */
+
+struct Radiotap_rx {
+        uint32_t ri_present;
+        uint64_t ri_mactime;
+        int32_t ri_power;
+        int32_t ri_noise;
+        uint32_t ri_channel;
+        uint32_t ri_freq;
+        uint32_t ri_rate;
+        uint32_t ri_antenna;
+};
+
 /**
  * Radiotap Header
  */
@@ -95,7 +181,9 @@ struct RadiotapHeader
   /**
    * radiotap version
    */
-  uint16_t version GNUNET_PACKED;
+  u_int8_t version;
+
+  u_int8_t pad_version;
   
   /**
    * radiotap header length
@@ -103,7 +191,7 @@ struct RadiotapHeader
   uint16_t length GNUNET_PACKED;
   
   /**
-   * bitmap
+   * bitmap, fields present
    */
   uint32_t bitmap GNUNET_PACKED;
   
@@ -144,3 +232,4 @@ struct RadiotapHeader
   uint8_t antenna;
 };
 
+#endif