diff options
Diffstat (limited to 'Documentation/networking/mac80211-injection.txt')
| -rw-r--r-- | Documentation/networking/mac80211-injection.txt | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/Documentation/networking/mac80211-injection.txt b/Documentation/networking/mac80211-injection.txt index 53ef7a06f49..3a930072b16 100644 --- a/Documentation/networking/mac80211-injection.txt +++ b/Documentation/networking/mac80211-injection.txt @@ -12,18 +12,26 @@ following format: The radiotap format is discussed in ./Documentation/networking/radiotap-headers.txt. -Despite 13 radiotap argument types are currently defined, most only make sense -to appear on received packets. Currently three kinds of argument are used by -the injection code, although it knows to skip any other arguments that are -present (facilitating replay of captured radiotap headers directly): +Despite many radiotap parameters being currently defined, most only make sense +to appear on received packets. The following information is parsed from the +radiotap headers and used to control injection: - - IEEE80211_RADIOTAP_RATE - u8 arg in 500kbps units (0x02 --> 1Mbps) + * IEEE80211_RADIOTAP_FLAGS - - IEEE80211_RADIOTAP_ANTENNA - u8 arg, 0x00 = ant1, 0x01 = ant2 + IEEE80211_RADIOTAP_F_FCS: FCS will be removed and recalculated + IEEE80211_RADIOTAP_F_WEP: frame will be encrypted if key available + IEEE80211_RADIOTAP_F_FRAG: frame will be fragmented if longer than the + current fragmentation threshold. - - IEEE80211_RADIOTAP_DBM_TX_POWER - u8 arg, dBm + * IEEE80211_RADIOTAP_TX_FLAGS -Here is an example valid radiotap header defining these three parameters + IEEE80211_RADIOTAP_F_TX_NOACK: frame should be sent without waiting for + an ACK even if it is a unicast frame + +The injection code can also skip all other currently defined radiotap fields +facilitating replay of captured radiotap headers directly. + +Here is an example valid radiotap header defining some parameters 0x00, 0x00, // <-- radiotap version 0x0b, 0x00, // <- radiotap header length @@ -52,8 +60,8 @@ interface), along the following lines: ... r = pcap_inject(ppcap, u8aSendBuffer, nLength); -You can also find sources for a complete inject test applet here: +You can also find a link to a complete inject application here: -http://penumbra.warmcat.com/_twk/tiki-index.php?page=packetspammer +http://wireless.kernel.org/en/users/Documentation/packetspammer Andy Green <andy@warmcat.com> |