Tiki RSS feed for the wiki pages http://penumbra.warmcat.com/_twk/tiki-wiki_rss.php?ver=2 Wed, 08 Sep 2010 00:50:53 +0100 Tiki CMS/Groupware via FeedCreator 1.7.2.1 http://penumbra.warmcat.com/_twk/img/tiki/tikilogo.png Penumbra http://penumbra.warmcat.com/_twk/tiki-index.php en-us Penumbra http://penumbra.warmcat.com/_twk/tiki-index.php?page=Penumbra .diffchar { color:red; } -
2007-07-16: mac80211 injection patches in Linus git ;-) will be in 2.6.23rc1?div> />iv class="titlebar">2007-07-13: MAC80211 INJECTION PATCHES ARE GOING INTO 2.6 KERNEL!!! Official pull request ki external" href="http://www.spinics.net/lists/linux-wireless/msg03613.html" rel="external">here

2007-06-13: packetspammer-0.6 with FC7 (S)RPM... from packetspammer page... looks like there might be some good news shortly ;-)

2007-03-16: packetspammer-0.4 available from Downloads as part of mac80211 "out of the box" support effort

2007-02-25: Dscape 80211 stack drivers: iwlwifi and rt73usb (rt2571 USB2 chipset)

2007-02-25: penumbrad-0.1 available: Core data transfer using https UI is pretty stable and complete

2007-02-12: penumbrad-0.0.2 is transferring files using penumbra packets and https!

2007-02-05: IPW2200 support available in Downloads!

2007-01-31: BCM43XX support now available in Downloads!

2007-01-25: ZD1211 USB chipset support available in Downloads!

2007-01-24: Packets transferred in both directions from ipw3945 laptops associated to different WPA networks! Early proof-of-concept patches and usermode code are available from the Downloads link at the left
+
2007-07-16: Linus' vanilla 2.6.23-rc1 onward is "Penumbra Ready" with no patches or new modules needed ;-)

2007-06-13: packetspammer-0.6 with FC7 (S)RPM... from packetspammer page...
]]> Thu, 09 Aug 2007 09:13:18 +0100 Downloads http://penumbra.warmcat.com/_twk/tiki-index.php?page=Downloads .diffchar { color:red; } -

Mac80211_stack_support_built_into_Linus_tree_based_kernels">Mac80211 stack support built into Linus tree-based kernels

+

rc1_kernels_are_quot_Penumbra_ready_quot_">2.6.23rc1+ kernels are "Penumbra-ready"

]]> Thu, 19 Jul 2007 15:07:18 +0100 packetspammer http://penumbra.warmcat.com/_twk/tiki-index.php?page=packetspammer .diffchar { color:red; } - Tarball: 7.tar.gz" rel="">packetspammer-0.7.tar.gz

F7 Binary RPM: 7-7.i686.rpm" rel="">packetspammer-0.7-7.i686.rpm

F7 SRPM: 7-7.src.rpm" rel="">packetspammer-0.7-7.src.rpm
+ Tarball: 6.tar.gz" rel="">packetspammer-0.6.tar.gz

F7 Binary RPM: 6-6.i686.rpm" rel="">packetspammer-0.6-6.i686.rpm

F7 SRPM: 6-6.src.rpm" rel="">packetspammer-0.6-6.src.rpm
- -w/--writeonly Do not monitor RX, just do injection
- Example 1:
- packetspammer -w wlan0 Spam without monitoring
-
- Example 2:
]]> Mon, 16 Jul 2007 16:28:55 +0100 penumbrad http://penumbra.warmcat.com/_twk/tiki-index.php?page=penumbrad .diffchar { color:red; } - Passing on requests is not implemented yet, but the rest of the file transfer actions are, so that two penumbra stations within range can pass files around using the protcol from requests by a browser.
+ Passing on requests is not implemented yet, but the rest of the file transfer actions are, so that two penumbra stations within range can pass files around using the protocol from requests by a browser.
]]> Wed, 11 Apr 2007 09:33:52 +0100 Implementation http://penumbra.warmcat.com/_twk/tiki-index.php?page=Implementation .diffchar { color:red; } - The payload is protected using a 255:223 Reed-Solomon? Forward Error Correction coding. This is capable to correct any 16 symbol errors over each 223 bytes of payload. To maximize the benefit of this protection, bulk data packets are limited to 213 bytes of actual payload (and a 10-byte header), giving a 255 byte encoded packet payload so each fragment fits inside a single error correction coding cycle. The Reed-Solomon? coding also means there is no need for a payload CRC.
+ The payload is protected using a 255:223 Reed-Solomon? Forward Error Correction coding. This is capable to correct any 16 symbol errors over each 223 bytes of payload. An extremely cool feature of this coding is that any amount of damage to a symbol (a byte in this case) counts as the same, so for serialized bitstreams like in ieee80211, it can recover from a dropout period of up to 128 bits since that still only damaged 16 bytes. To maximize the benefit of this protection, bulk data packets are limited to 213 bytes of actual payload (and a 10-byte header), giving a 255 byte encoded packet payload so each fragment fits inside a single error correction coding cycle. The Reed-Solomon? coding also means there is no need for a payload CRC.
]]> Fri, 30 Mar 2007 10:34:17 +0100 RFC http://penumbra.warmcat.com/_twk/tiki-index.php?page=RFC .diffchar { color:red; } + 0.0.2
- Download: 3.txt" rel="">penumbra-rfc-0.0.3.txt
+ 0.0.4

Defined content for other IEEE80211 header fields.



Download: 4.txt" rel="">penumbra-rfc-0.0.4.txt
]]> Tue, 27 Feb 2007 20:18:52 +0100 FAQ http://penumbra.warmcat.com/_twk/tiki-index.php?page=FAQ .diffchar { color:red; } - Any SSLv2 or SSLv3 -capable browser (which is pretty much all modern browsers) should work fine. It is tested with Konqueror and Firefox here. You don't need any Javascript.


+ Any SSLv2 or SSLv3 -capable browser (which is pretty much all modern browsers) should work fine. It is tested with Konqueror and Firefox here. Javascript is used now for the navigation and category select functionality.
]]> Sun, 11 Feb 2007 17:51:40 +0100 Penumbra Module http://penumbra.warmcat.com/_twk/tiki-index.php?page=Penumbra+Module .diffchar { color:red; } +

Penumbra Module

+
+ The Penumbra Module simplifies and centralizes the support functions needed to add Penumbra support to a wireless device. In most cases the edits required in the wireless driver are reduced to a dozen lines or so.
+
+
Netdev Notification Hook
+
+ A major task of the Penumbra module is to receive notifications about network device addition and removal, and to take care of hooking the hard_start_transmit function pointer in the network device structure. In the hook function, the packet is examined to see if it has the Penumbra Magic MAC. If it does, then instead of being passed through to the ieee80211 stack transmit function, it is given instead to the wireless driver's hard_start_transmit, bypassing encryption and modification by the ieee80211 stack altogether.
+
+ The hooking is transparent and is added on device addition and removed seamlessly on device removal. Packets without the Magic MAC are passed into the ieee80211 stack as usual.
+
+
Penumbra Packet Reception
+
+ When the wireless driver detects the Magic MAC address on an incoming packet, it is able to hand the skb off to a function PenumbraReceivePacket() in the Penumbra module. This takes care of applying the fake UDP header and checksums and other details and then passes the packet into the networking code, again bypassing the ieee80211 stack altogether.
+
+
Magic MAC definition
+
+ The module also exports a pointer to a 6-byte array defining the Magic MAC in a single place, and the drivers export this address and use it when they need to talk about the Magic MAC.
]]> Wed, 31 Jan 2007 13:28:44 +0100 Packet Traces http://penumbra.warmcat.com/_twk/tiki-index.php?page=Packet+Traces .diffchar { color:red; } -
UDP Thread: Received 49 bytes
+
>

> UDP Thread: Received 49 bytes
-
13:56:57.378047 IP (tos 0x0, ttl 1, id 248, offset 0, flags none, proto: UDP (17), length: 77) 0.0.0.0.61441 > 255.255.255.255.61442: udp sum ok UDP, length 49
+
>

> 13:56:57.378047 IP (tos 0x0, ttl 1, id 248, offset 0, flags none, proto: UDP (17), length: 77) 0.0.0.0.61441 > 255.255.255.255.61442: udp sum ok UDP, length 49
-
13:57:41.299824 IP (tos 0x0, ttl 1, id 33017, offset 0, flags none, proto: UDP (17), length: 77) 0.0.0.0.61441 > 255.255.255.255.61442: udp sum ok UDP, length 49
+
>

> 13:57:41.299824 IP (tos 0x0, ttl 1, id 33017, offset 0, flags none, proto: UDP (17), length: 77) 0.0.0.0.61441 > 255.255.255.255.61442: udp sum ok UDP, length 49
-
14:00:56.310673 54.0 Mb/s 2417 MHz (0x00c0) 11:22:33:44:55:66 (oui Unknown) Null > 11:22:33:44:55:66 (oui Unknown) SNAP Information, send seq 48, rcv seq 0, Flags Command, length 57
+
>

> 14:00:56.310673 54.0 Mb/s 2417 MHz (0x00c0) 11:22:33:44:55:66 (oui Unknown) Null > 11:22:33:44:55:66 (oui Unknown) SNAP Information, send seq 48, rcv seq 0, Flags Command, length 57
]]> Wed, 24 Jan 2007 16:04:09 +0100 HomePage http://penumbra.warmcat.com/_twk/tiki-index.php?page=HomePage .diffchar { color:red; } ]]> Mon, 15 Jan 2007 20:43:00 +0100