First try of the wlan-helper

1 files changed, 365 insertions, 0 deletions

diff --git a/src/transport/gnunet-transport-wlan-helper.h b/src/transport/gnunet-transport-wlan-helper.h
new file mode 100644
index 000000000..f8fa145f2
--- /dev/null
+++ b/src/transport/gnunet-transport-wlan-helper.h
@@ -0,0 +1,365 @@
+/*
+     This file is part of GNUnet.
+     (C) 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/gnunet-wlan.h
+ * @brief common internal definitions for the wlan mediator
+ * @author David Brodski
+ */
+ 
+#ifndef gnunet_wlan_H
+#define gnunet_wlan_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <resolv.h>
+#include <string.h>
+#include <utime.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <pcap.h>
+#include <endian.h>
+#include <pcap/pcap.h>
+
+
+typedef unsigned int u32;
+typedef unsigned short u16;
+typedef unsigned char u8;
+typedef u32 __le32;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define le16_to_cpu(x) (x)
+#define le32_to_cpu(x) (x)
+#else
+#define le16_to_cpu(x) ((((x)&0xff)<<8)|(((x)&0xff00)>>8))
+#define le32_to_cpu(x) \
+((((x)&0xff)<<24)|(((x)&0xff00)<<8)|(((x)&0xff0000)>>8)|(((x)&0xff000000)>>24))
+#endif
+#define unlikely(x) (x)
+
+
+#endif /* gnunet_wlan_H */
+
+
+/*
+ * Copyright (c) 2003, 2004 David Young.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of David Young may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DAVID
+ * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+/*
+ * Modifications to fit into the linux IEEE 802.11 stack,
+ * Mike Kershaw (dragorn@kismetwireless.net)
+ */
+
+#ifndef IEEE80211RADIOTAP_H
+#define IEEE80211RADIOTAP_H
+
+#include <linux/if_ether.h>
+#include <linux/kernel.h>
+//#include <asm/unaligned.h>
+
+/* Base version of the radiotap packet header data */
+#define PKTHDR_RADIOTAP_VERSION         0
+
+/* A generic radio capture format is desirable. There is one for
+ * Linux, but it is neither rigidly defined (there were not even
+ * units given for some fields) nor easily extensible.
+ *
+ * I suggest the following extensible radio capture format. It is
+ * based on a bitmap indicating which fields are present.
+ *
+ * I am trying to describe precisely what the application programmer
+ * should expect in the following, and for that reason I tell the
+ * units and origin of each measurement (where it applies), or else I
+ * use sufficiently weaselly language ("is a monotonically nondecreasing
+ * function of...") that I cannot set false expectations for lawyerly
+ * readers.
+ */
+
+/*
+ * The radio capture header precedes the 802.11 header.
+ * All data in the header is little endian on all platforms.
+ */
+struct ieee80211_radiotap_header {
+        u8 it_version;          /* Version 0. Only increases
+                                 * for drastic changes,
+                                 * introduction of compatible
+                                 * new fields does not count.
+                                 */
+        u8 it_pad;
+        __le16 it_len;          /* length of the whole
+                                 * header in bytes, including
+                                 * it_version, it_pad,
+                                 * it_len, and data fields.
+                                 */
+        __le32 it_present;      /* A bitmap telling which
+                                 * fields are present. Set bit 31
+                                 * (0x80000000) to extend the
+                                 * bitmap by another 32 bits.
+                                 * Additional extensions are made
+                                 * by setting bit 31.
+                                 */
+} __packed;
+
+/* Name                                 Data type    Units
+ * ----                                 ---------    -----
+ *
+ * IEEE80211_RADIOTAP_TSFT              __le64       microseconds
+ *
+ *      Value in microseconds of the MAC's 64-bit 802.11 Time
+ *      Synchronization Function timer when the first bit of the
+ *      MPDU arrived at the MAC. For received frames, only.
+ *
+ * IEEE80211_RADIOTAP_CHANNEL           2 x __le16   MHz, bitmap
+ *
+ *      Tx/Rx frequency in MHz, followed by flags (see below).
+ *
+ * IEEE80211_RADIOTAP_FHSS              __le16       see below
+ *
+ *      For frequency-hopping radios, the hop set (first byte)
+ *      and pattern (second byte).
+ *
+ * IEEE80211_RADIOTAP_RATE              u8           500kb/s
+ *
+ *      Tx/Rx data rate
+ *
+ * IEEE80211_RADIOTAP_DBM_ANTSIGNAL     s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      RF signal power at the antenna, decibel difference from
+ *      one milliwatt.
+ *
+ * IEEE80211_RADIOTAP_DBM_ANTNOISE      s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      RF noise power at the antenna, decibel difference from one
+ *      milliwatt.
+ *
+ * IEEE80211_RADIOTAP_DB_ANTSIGNAL      u8           decibel (dB)
+ *
+ *      RF signal power at the antenna, decibel difference from an
+ *      arbitrary, fixed reference.
+ *
+ * IEEE80211_RADIOTAP_DB_ANTNOISE       u8           decibel (dB)
+ *
+ *      RF noise power at the antenna, decibel difference from an
+ *      arbitrary, fixed reference point.
+ *
+ * IEEE80211_RADIOTAP_LOCK_QUALITY      __le16       unitless
+ *
+ *      Quality of Barker code lock. Unitless. Monotonically
+ *      nondecreasing with "better" lock strength. Called "Signal
+ *      Quality" in datasheets.  (Is there a standard way to measure
+ *      this?)
+ *
+ * IEEE80211_RADIOTAP_TX_ATTENUATION    __le16       unitless
+ *
+ *      Transmit power expressed as unitless distance from max
+ *      power set at factory calibration.  0 is max power.
+ *      Monotonically nondecreasing with lower power levels.
+ *
+ * IEEE80211_RADIOTAP_DB_TX_ATTENUATION __le16       decibels (dB)
+ *
+ *      Transmit power expressed as decibel distance from max power
+ *      set at factory calibration.  0 is max power.  Monotonically
+ *      nondecreasing with lower power levels.
+ *
+ * IEEE80211_RADIOTAP_DBM_TX_POWER      s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      Transmit power expressed as dBm (decibels from a 1 milliwatt
+ *      reference). This is the absolute power level measured at
+ *      the antenna port.
+ *
+ * IEEE80211_RADIOTAP_FLAGS             u8           bitmap
+ *
+ *      Properties of transmitted and received frames. See flags
+ *      defined below.
+ *
+ * IEEE80211_RADIOTAP_ANTENNA           u8           antenna index
+ *
+ *      Unitless indication of the Rx/Tx antenna for this packet.
+ *      The first antenna is antenna 0.
+ *
+ * IEEE80211_RADIOTAP_RX_FLAGS          __le16       bitmap
+ *
+ *     Properties of received frames. See flags defined below.
+ *
+ * IEEE80211_RADIOTAP_TX_FLAGS          __le16       bitmap
+ *
+ *     Properties of transmitted frames. See flags defined below.
+ *
+ * IEEE80211_RADIOTAP_RTS_RETRIES       u8           data
+ *
+ *     Number of rts retries a transmitted frame used.
+ *
+ * IEEE80211_RADIOTAP_DATA_RETRIES      u8           data
+ *
+ *     Number of unicast retries a transmitted frame used.
+ *
+ */
+enum ieee80211_radiotap_type {
+        IEEE80211_RADIOTAP_TSFT = 0,
+        IEEE80211_RADIOTAP_FLAGS = 1,
+        IEEE80211_RADIOTAP_RATE = 2,
+        IEEE80211_RADIOTAP_CHANNEL = 3,
+        IEEE80211_RADIOTAP_FHSS = 4,
+        IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
+        IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
+        IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
+        IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
+        IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
+        IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
+        IEEE80211_RADIOTAP_ANTENNA = 11,
+        IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
+        IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
+        IEEE80211_RADIOTAP_RX_FLAGS = 14,
+        IEEE80211_RADIOTAP_TX_FLAGS = 15,
+        IEEE80211_RADIOTAP_RTS_RETRIES = 16,
+        IEEE80211_RADIOTAP_DATA_RETRIES = 17,
+
+        /* valid in every it_present bitmap, even vendor namespaces */
+        IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29,
+        IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
+        IEEE80211_RADIOTAP_EXT = 31
+};
+
+/* Channel flags. */
+#define IEEE80211_CHAN_TURBO    0x0010  /* Turbo channel */
+#define IEEE80211_CHAN_CCK      0x0020  /* CCK channel */
+#define IEEE80211_CHAN_OFDM     0x0040  /* OFDM channel */
+#define IEEE80211_CHAN_2GHZ     0x0080  /* 2 GHz spectrum channel. */
+#define IEEE80211_CHAN_5GHZ     0x0100  /* 5 GHz spectrum channel */
+#define IEEE80211_CHAN_PASSIVE  0x0200  /* Only passive scan allowed */
+#define IEEE80211_CHAN_DYN      0x0400  /* Dynamic CCK-OFDM channel */
+#define IEEE80211_CHAN_GFSK     0x0800  /* GFSK channel (FHSS PHY) */
+
+/* For IEEE80211_RADIOTAP_FLAGS */
+#define IEEE80211_RADIOTAP_F_CFP        0x01    /* sent/received
+                                                 * during CFP
+                                                 */
+#define IEEE80211_RADIOTAP_F_SHORTPRE   0x02    /* sent/received
+                                                 * with short
+                                                 * preamble
+                                                 */
+#define IEEE80211_RADIOTAP_F_WEP        0x04    /* sent/received
+                                                 * with WEP encryption
+                                                 */
+#define IEEE80211_RADIOTAP_F_FRAG       0x08    /* sent/received
+                                                 * with fragmentation
+                                                 */
+#define IEEE80211_RADIOTAP_F_FCS        0x10    /* frame includes FCS */
+#define IEEE80211_RADIOTAP_F_DATAPAD    0x20    /* frame has padding between
+                                                 * 802.11 header and payload
+                                                 * (to 32-bit boundary)
+                                                 */
+#define IEEE80211_RADIOTAP_F_BADFCS     0x40    /* bad FCS */
+
+/* For IEEE80211_RADIOTAP_RX_FLAGS */
+#define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002  /* frame has bad PLCP */
+
+/* For IEEE80211_RADIOTAP_TX_FLAGS */
+#define IEEE80211_RADIOTAP_F_TX_FAIL    0x0001  /* failed due to excessive
+                                                 * retries */
+#define IEEE80211_RADIOTAP_F_TX_CTS     0x0002  /* used cts 'protection' */
+#define IEEE80211_RADIOTAP_F_TX_RTS     0x0004  /* used rts/cts handshake */
+
+/* Ugly macro to convert literal channel numbers into their mhz equivalents
+ * There are certianly some conditions that will break this (like feeding it '30')
+ * but they shouldn't arise since nothing talks on channel 30. */
+#define ieee80211chan2mhz(x) \
+        (((x) <= 14) ? \
+        (((x) == 14) ? 2484 : ((x) * 5) + 2407) : \
+        ((x) + 1000) * 5)
+
+/* helpers */
+static inline int ieee80211_get_radiotap_len(unsigned char *data)
+{
+        struct ieee80211_radiotap_header *hdr =
+                (struct ieee80211_radiotap_header *)data;
+
+        return get_unaligned_le16(&hdr->it_len);
+}
+
+#endif                          /* IEEE80211_RADIOTAP_H */
+
+
+
+/* Radiotap header iteration
+ *   implemented in net/wireless/radiotap.c
+ *   docs in Documentation/networking/radiotap-headers.txt
+ */
+/**
+ * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
+ * @rtheader: pointer to the radiotap header we are walking through
+ * @max_length: length of radiotap header in cpu byte ordering
+ * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg
+ * @this_arg: pointer to current radiotap arg
+ * @arg_index: internal next argument index
+ * @arg: internal next argument pointer
+ * @next_bitmap: internal pointer to next present u32
+ * @bitmap_shifter: internal shifter for curr u32 bitmap, 23344";
+b0 set == arg present
+ */
+
+struct ieee80211_radiotap_iterator {
+        struct ieee80211_radiotap_header *rtheader;
+        int max_length;
+        int this_arg_index;
+        u8 *this_arg;
+
+        int arg_index;
+        u8 *arg;
+        __le32 *next_bitmap;
+        u32 bitmap_shifter;
+};
+
+extern int ieee80211_radiotap_iterator_init(
+   struct ieee80211_radiotap_iterator *iterator,
+   struct ieee80211_radiotap_header *radiotap_header,
+   int max_length);
+
+extern int ieee80211_radiotap_iterator_next(
+   struct ieee80211_radiotap_iterator *iterator);