mac80211: update injection documentation
We don't currently support antenna or rate setting, so remove that. Also update the link -- the current one is dead and the wiki can be kept updated easier. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -12,38 +12,22 @@ following format:
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The radiotap format is discussed in
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The radiotap format is discussed in
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./Documentation/networking/radiotap-headers.txt.
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./Documentation/networking/radiotap-headers.txt.
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Despite 13 radiotap argument types are currently defined, most only make sense
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Despite many radiotap parameters being currently defined, most only make sense
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to appear on received packets. The following information is parsed from the
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to appear on received packets. The following information is parsed from the
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radiotap headers and used to control injection:
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radiotap headers and used to control injection:
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* IEEE80211_RADIOTAP_RATE
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rate in 500kbps units, automatic if invalid or not present
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* IEEE80211_RADIOTAP_ANTENNA
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antenna to use, automatic if not present
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* IEEE80211_RADIOTAP_DBM_TX_POWER
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transmit power in dBm, automatic if not present
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* IEEE80211_RADIOTAP_FLAGS
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* IEEE80211_RADIOTAP_FLAGS
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IEEE80211_RADIOTAP_F_FCS: FCS will be removed and recalculated
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IEEE80211_RADIOTAP_F_FCS: FCS will be removed and recalculated
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IEEE80211_RADIOTAP_F_WEP: frame will be encrypted if key available
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IEEE80211_RADIOTAP_F_WEP: frame will be encrypted if key available
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IEEE80211_RADIOTAP_F_FRAG: frame will be fragmented if longer than the
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IEEE80211_RADIOTAP_F_FRAG: frame will be fragmented if longer than the
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current fragmentation threshold. Note that
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current fragmentation threshold.
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this flag is only reliable when software
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fragmentation is enabled)
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The injection code can also skip all other currently defined radiotap fields
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The injection code can also skip all other currently defined radiotap fields
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facilitating replay of captured radiotap headers directly.
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facilitating replay of captured radiotap headers directly.
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Here is an example valid radiotap header defining these three parameters
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Here is an example valid radiotap header defining some parameters
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0x00, 0x00, // <-- radiotap version
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0x00, 0x00, // <-- radiotap version
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0x0b, 0x00, // <- radiotap header length
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0x0b, 0x00, // <- radiotap header length
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@ -72,8 +56,8 @@ interface), along the following lines:
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...
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...
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r = pcap_inject(ppcap, u8aSendBuffer, nLength);
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r = pcap_inject(ppcap, u8aSendBuffer, nLength);
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You can also find sources for a complete inject test applet here:
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You can also find a link to a complete inject application here:
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http://penumbra.warmcat.com/_twk/tiki-index.php?page=packetspammer
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http://wireless.kernel.org/en/users/Documentation/packetspammer
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Andy Green <andy@warmcat.com>
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Andy Green <andy@warmcat.com>
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