B.A.T.M.A.N August 2015

b.a.t.m.a.n@lists.open-mesh.org

17 participants
58 discussions

[B.A.T.M.A.N.] pull request: batman-adv 20150825
by Antonio Quartulli 25 Aug '15

25 Aug '15

Hello David, here you have another batch intended for net-next/linux-4.3. Most of the patches are about code restyling and beautification, but we also a couple of non critical fixes which didn't make their way through net. Please pull or let me know of any problem! Thanks a lot, Antonio The following changes since commit 56fff0a01fa056502a28d67cb5a2714d64780415: Merge branch 'fjes' (2015-08-24 14:06:37 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batman-adv-for-davem for you to fetch changes up to 854d2a63de86a769db4dbed75b660f544b3c0c7a: batman-adv: beautify supported routing algorithm list (2015-08-25 00:12:24 +0200) ---------------------------------------------------------------- Included changes: - code restyling and beautification - use int kernel types instead of C99 - update kereldoc - prevent potential hlist double deletion of VLAN objects - fix gw bandwidth calculation - convert list to hlist when needed - add lockdep_asserts calls in function with lock requirements described in kerneldoc ---------------------------------------------------------------- Marek Lindner (6): batman-adv: update kernel doc of batadv_tt_global_del_orig_entry() batman-adv: rename batadv_new_tt_req_node to batadv_tt_req_node_new batman-adv: convert orig_node->vlan_list to hlist batman-adv: prevent potential hlist double deletion batman-adv: convert bat_priv->tt.req_list to hlist batman-adv: beautify supported routing algorithm list Sven Eckelmann (9): batman-adv: Replace C99 int types with kernel type batman-adv: Fix kerneldoc over 80 column lines batman-adv: Remove multiple assignment per line batman-adv: Remove batadv_ types forward declarations batman-adv: Return EINVAL on invalid gw_bandwidth change batman-adv: Fix gw_bandwidth calculation on 32 bit systems batman-adv: Annotate deleting functions with external lock via lockdep batman-adv: Add lockdep_asserts for documented external locks batman-adv: Fix conditional statements indentation net/batman-adv/bat_iv_ogm.c | 102 +++++------ net/batman-adv/bitarray.c | 6 +- net/batman-adv/bitarray.h | 10 +- net/batman-adv/bridge_loop_avoidance.c | 78 ++++----- net/batman-adv/bridge_loop_avoidance.h | 8 +- net/batman-adv/debugfs.h | 1 - net/batman-adv/distributed-arp-table.c | 62 +++---- net/batman-adv/distributed-arp-table.h | 8 +- net/batman-adv/fragmentation.c | 13 +- net/batman-adv/gateway_client.c | 27 +-- net/batman-adv/gateway_client.h | 2 +- net/batman-adv/gateway_common.c | 67 +++++-- net/batman-adv/gateway_common.h | 1 - net/batman-adv/hash.c | 6 +- net/batman-adv/hash.h | 12 +- net/batman-adv/icmp_socket.c | 6 +- net/batman-adv/icmp_socket.h | 1 - net/batman-adv/main.c | 84 ++++----- net/batman-adv/main.h | 48 +++-- net/batman-adv/multicast.c | 35 ++-- net/batman-adv/multicast.h | 2 - net/batman-adv/network-coding.c | 55 +++--- net/batman-adv/network-coding.h | 4 - net/batman-adv/originator.c | 22 +-- net/batman-adv/originator.h | 11 +- net/batman-adv/packet.h | 204 +++++++++++----------- net/batman-adv/routing.c | 24 +-- net/batman-adv/routing.h | 6 +- net/batman-adv/send.c | 8 +- net/batman-adv/send.h | 11 +- net/batman-adv/soft-interface.c | 26 ++- net/batman-adv/soft-interface.h | 4 - net/batman-adv/sysfs.c | 4 +- net/batman-adv/sysfs.h | 2 - net/batman-adv/translation-table.c | 308 ++++++++++++++++++--------------- net/batman-adv/translation-table.h | 31 ++-- net/batman-adv/types.h | 113 ++++++------ 37 files changed, 733 insertions(+), 679 deletions(-)

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[B.A.T.M.A.N.] [PATCH-maint 0/4] Some fixes for DAT/TT/Speedy join corner cases
by Simon Wunderlich 25 Aug '15

25 Aug '15

Upon debugging a network with dangling, bogus TT entries, I found a couple of bugs for which I would like to propose fixes. The network showed the following symptoms: * DAT was enabled * VLANs were used, but not every originator used the same VLANs * I've found global entries assigned to originators which actually never had the client in question connected to them. These false target originators didn't even had the VLANs in use or bridged for which the entry was done. This caused packets sent to be sent to these wrong originators. * The wrong entries also didn't get purged automatically, since they didn't announce the VLAN in question through their TT TLVLs, and the TT code didn't check for excess VLANs. * Furthermore, the temp flag was removed too early from the TT entries so that the purge function was not removing the entry after a timeout as well. * I've found that with DAT, the cached ARP replies may cause these TT entries to be created on behalf of the answering host. This is wrong, since the answering host (usually) doesn't actually has the client connected. Three of these four patches fix various issues connected with the problem described above. The fourth one is merely a style fix which does not neccessarily have to be adopted to maint. We have not yet tested these patches in the network, and the bug also appears only once in a couple of days. Therefore I'd like to ask to review these patches thoroughly, and if you agree to the fixes we will apply them in this production network. Thanks, Simon Simon Wunderlich (4): batman-adv: fix speedy join for DAT cache replies batman-adv: avoid keeping false temporary entry batman-adv: unify flags access style in tt global add batman-adv: detect local excess vlans in TT request net/batman-adv/routing.c | 17 +++++++++++++---- net/batman-adv/translation-table.c | 33 ++++++++++++++++++++++++++++++--- 2 files changed, 43 insertions(+), 7 deletions(-) -- 2.5.0

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[B.A.T.M.A.N.] Kernel crashes when using more than one interface in bat0
by Bjoern Franke 23 Aug '15

23 Aug '15

Hi, we are using batman-adv in our Freifunk network for meshing over several interfaces. The nodes are connected to vpn-servers via fastd, the vpn-servers are connected via tincd or gretap. When we put the fastd-interface and the tinc (or gretap)-inteface into bat0, the kernel crashes after some time. With 2013.4, no crashes occured, but since the update to 2014.3 the issue happens sometimes after 5 minutes, sometimes after 3 days. Upgrading to 2015.1 did not solve the problem, it seems the crashes occur more often then. Unfornately we have no logs now, because after the crashes no ssh -access to the servers are possible. nc / mm / bl are set disabled and seem to have no effect on this issue. Regards Bjoern -- xmpp bjo(a)schafweide.org

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Re: [B.A.T.M.A.N.] Why we switched to Babel
by Marek Lindner 19 Aug '15

19 Aug '15

On Saturday, August 15, 2015 07:05:17 Marc Juul wrote: > > I am afraid by telling your mesh users that you switched to an IP based > > mesh protocol you lure them into a false sense of 'non-traceability'. It > > kind of feels like a debate we had almost a decade ago when WiFi came to > > the masses. People had the feeling to use WiFi they had to learn what this > > cumbersome SSL thing is. Because WiFi is insecure as the waves leave your > > home and the neighbors can eavesdrop on you .. Countless hours had to be > > invested into educating our mesh users that SSL always is a good thing. > > > > Personally, I rotate my MAC address on a daily basis. That works not only > > with > > batman-adv but everywhere. Obviously, that won't help you against the > > countless ad networks, Google, Facebook, etc, etc > > I hear you. > > The biggest danger I feel is that associating to one of our access points > once with your phone would then allow anyone, even a technically > semi-literate stalker, to track you and find out where you live and work > using something we built. My fear would be that someone could use this data > to put up a public web app where any idiot can put in a MAC address and > instantly get a nice map of movement activity. I think we are at a point in our discussion where we just repeat what was already said. batman-adv certainly can be improved to provide better anonymity by default. Even with such a mechanism in place people can be tracked in your network (with IP mesh routing or without). Tracking without connecting to your network is even easier than that. Therefore, I favor education over a technology arms race. The latter you won't be able to win as you eventually will have to battle people's desire for the 'least effort route'. > Hopefully these tracking services you mention are not quite so easy to > access and use for something like this by an unlicensed individual (but > maybe they are?) though even if others are making these types of services > available, I'd rather not make it easy for them to use our network for their > nefarious purposes. These systems are built for absolutely non-technical users. For those who prefer videos over boring texts: https://www.youtube.com/watch?v=hCGiGaRp7-U I recommend to pay close attention to the section they call 'loyal customers' (around 1:30min into the video). Note that this was just the first search result that came up. There are many more. Cheers, Marek

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[B.A.T.M.A.N.] pull request: batman-adv 20150814
by Antonio Quartulli 17 Aug '15

17 Aug '15

Hi David, this is our first batch intended for net-next/linux-4.3 (resent after fixing the parenthesis as reported by Sergei). Here you have all those non-critical fixes/changes that we couldn't merge into the net tree as it was already too late in the release cycle. This is a summary of what each patch does: - patch 1 by Sven Eckelmann is changing the way the GW metric is computed so that the resulting operation does not make use of divisions and also does not lead to any data type promotion. This is a requirement for patch 2; - patch 2 by Ruben Wisniewski is changing the type of the variable used in the same GW metric computation as patch 1 to uint64_t so that potential integer overflows are prevented. Thanks to Sven's patch above no 64bit division will be involved; - patches 3, 4, 5 and 6 by Linus Lüssing are converting plain bitwise operations on capability bits to set/clear/test_bit() in order to ensure their atomicity and prevent potential race conditions; - patch 7, also by Linus, is making the multicast TVLV parsing routine thread-safe in order to prevent potential race conditions upon reception of two OGMs from the same originator at the same time; - patch 8 by Marek Lindner prevents potential double deletions of TT Request objects from its lists which would lead to a kernel crash. - patch 9 by Simon Wunderlich is ensuring that no enqueued packet is leaked when an interface is deactivated; - patch 10 by Linus Lüssing is setting the network header in the skb struct right after a packet was delivered to the batman virtual interface so that subsequent call to ip/ipv6_hdr() do not crash. Please pull or let me know of any problem! Thanks a lot David, Antonio The following changes since commit 07a51cd3794960548627a27aae68c1446341db32: vxlan: fix fdb_dump index calculation (2015-08-10 21:15:18 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batman-adv-for-davem for you to fetch changes up to 53cf037bf846417fd92dc92ddf97267f69b110f4: batman-adv: Fix potentially broken skb network header access (2015-08-14 22:52:10 +0200) ---------------------------------------------------------------- Included changes: - avoid integer overflow in GW selection routine - prevent race condition by making capability bit changes atomic (use clear/set/test_bit) - fix synchronization issue in mcast tvlv handler - fix crash on double list removal of TT Request objects - fix leak by puring packets enqueued for sending upon iface removal - ensure network header pointer is set in skb ---------------------------------------------------------------- Linus Lüssing (6): batman-adv: Make DAT capability changes atomic batman-adv: Make NC capability changes atomic batman-adv: Make TT capability changes atomic batman-adv: Make MCAST capability changes atomic batman-adv: Fix potential synchronization issues in mcast tvlv handler batman-adv: Fix potentially broken skb network header access Marek Lindner (1): batman-adv: protect tt request from double deletion Ruben Wisniewski (1): batman-adv: Avoid u32 overflow during gateway select Simon Wunderlich (1): batman-adv: remove broadcast packets scheduled for purged outgoing if Sven Eckelmann (1): batman-adv: Replace gw_reselect divisor with simple shift net/batman-adv/distributed-arp-table.c | 7 +-- net/batman-adv/gateway_client.c | 8 +--- net/batman-adv/multicast.c | 81 +++++++++++++++++++++++++--------- net/batman-adv/network-coding.c | 7 +-- net/batman-adv/originator.c | 5 +++ net/batman-adv/send.c | 3 +- net/batman-adv/soft-interface.c | 7 ++- net/batman-adv/translation-table.c | 17 ++++--- net/batman-adv/types.h | 15 ++++--- 9 files changed, 102 insertions(+), 48 deletions(-)

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[B.A.T.M.A.N.] [PATCH] alfred: mention libcap in the README
by Simon Wunderlich 17 Aug '15

17 Aug '15

Reported-by: Florian Steinel <alfred(a)open-mesh.org.flonet.net> Signed-off-by: Simon Wunderlich <sw(a)simonwunderlich.de> --- README | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/README b/README index 7cef9f6..938a275 100644 --- a/README +++ b/README @@ -29,8 +29,9 @@ alfred depends on: * librt (usually part of libc) * IPv6 support in the kernel/host system -and if distributing GPS information: - * libgps +and optionally: + * libgps - if you want to distribute GPS information + * libcap - if you want extra security by dropping unneeded privileges To compile alfred, simply type: @@ -53,6 +54,10 @@ CONFIG_ALFRED_GPSD=n: $ make CONFIG_ALFRED_GPSD=n $ make CONFIG_ALFRED_GPSD=n install +If don't want to compile with libcap to drop privileges, use: + + $ make CONFIG_ALFRED_CAPABILITIES=n + $ make CONFIG_ALFRED_CAPABILITIES=n install Usage ----- -- 2.1.4

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Re: [B.A.T.M.A.N.] Why we switched to Babel
by Marek Lindner 15 Aug '15

15 Aug '15

On Saturday, August 15, 2015 04:21:27 Marc Juul wrote: > > What spoke against using the batman-adv layer2 fragmentation: > > > > http://www.open-mesh.org/projects/open-mesh/wiki/2012-09-24-GSoC-2012-Mart > > in-Hundebolls-Final-Report ? > > This was a while back now but if I remember correctly we were getting > terrible performance when using fragmentation. We were at the time using > the old Picostation 2 HP routers, which we only later learned perform > terribly even when they're just acting as dumb bridges, so that could > definitely have been a significant factor. None of our team were super > experienced with wifi/mesh when we started out and we are much wiser now > than we were a year ago when we made this switch, so it's possible that we > could go back and use fragmentation and have batman-adv work for us now. I'd expect some impact on performance but nothing as dramatic as what you are describing. Would be interesting to get actual numbers. > However, the privacy issue with a city-wide network using the client MAC > address for identification still stands as something we do not know how to > fix for batman-adv. To make matters worse we've had some people > misinterpret what we're doing and then go out and tell others that we're > making some privacy-focused network with anti-NSA-surveillance measures, > which made it even worse to have to explain that anyone who knows your MAC > can track you as you move about the city. Though I recognize and share the desire for privacy batman-adv is first and foremost a mesh protocol. Not an anonymizer or NSA-defender. That being said, I am not adverse to somebody working on this subject and making batman-adv a better place. I do like to point that even by not using batman-adv one can easily be tracked via the MAC address on a national or global scale. Search online for the magic words 'presence analytics' and you'll get an impressive list of companies (most of them based in the Bay area) offering products & tools able to track you all around the country or even internationally (depends on the size of your business). I myself have been contacted by quite a number of companies asking me to help them to develop such systems. You don't even need to connect to these hotspots to be tracked. Passing by is enough. I am afraid by telling your mesh users that you switched to an IP based mesh protocol you lure them into a false sense of 'non-traceability'. It kind of feels like a debate we had almost a decade ago when WiFi came to the masses. People had the feeling to use WiFi they had to learn what this cumbersome SSL thing is. Because WiFi is insecure as the waves leave your home and the neighbors can eavesdrop on you .. Countless hours had to be invested into educating our mesh users that SSL always is a good thing. Personally, I rotate my MAC address on a daily basis. That works not only with batman-adv but everywhere. Obviously, that won't help you against the countless ad networks, Google, Facebook, etc, etc Cheers, Marek

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[B.A.T.M.A.N.] batman-adv 2015.1 released
by Marek Lindner 15 Aug '15

15 Aug '15

August 10, 2015. The B.A.T.M.A.N. team today releases batman-adv 2015.1 focusing on code cleanups, stability and bugfixes. Since no major code changes were introduced upgrading to this version should bear minimal risks. As the kernel module always depends on the Linux kernel it is compiled against, it does not make sense to provide binaries on our website. As usual, you will find the signed tarballs in our download section: http://downloads.open-mesh.org/batman/releases/batman-adv-2015.1/ as well as prepackaged binaries in your distribution. Important changes ----------------- The default settings for enabling Network Coding and the bridge loop avoidance have been changed. If you are using either feature, please verify that your setup still behaves as expected after the upgrade. Thanks ------ Thanks to all people sending in patches: * Alex Suykov <alex.suykov(a)gmail.com> * Antonio Quartulli <antonio(a)meshcoding.com> * Linus Lüssing <linus.luessing(a)c0d3.blue> * Marek Lindner <mareklindner(a)neomailbox.ch> * Markus Pargmann <mpa(a)pengutronix.de> * Ruben Wisniewsi <ruben(a)vfn-nrw.de> * Simon Wunderlich <sw(a)simonwunderlich.de> * Sven Eckelmann <sven(a)narfation.org> batman-adv ---------- With this release the source directory structure has been modified to align with the batman-adv directory structure in the Linux kernel. This should facilitate proposing and applying patches based on the code base shipped with Linux kernel. In parallel to this restructuring effort, the compat layer (needed to support older Linux kernel versions) also has been modernized. The single compat include file has been divided into separate header files named after their up-to-date counterparts. Previously needed explicit compat includes could be removed, thus further reducing the difference between the Linux kernel code and the out-of-tree repository. To make the first time deployment a better experience the default configuration has been changed: Network Coding support has been disabled due to its dependency on WiFi promiscuous mode that not all WiFi chips/drivers support. The bridge loop avoidance mechanism (BLA) has been enabled to prevent accidental bridge loops from being created. The batman-adv module came with its own Jenkins hash implementation used by all sorts of components like the originator table, the translation table and more. That implementation has been replaced with the in-kernel Jenkins hash which provides better optimized code. The debugfs components aren't compiled into the module anymore when debugfs is not compiled into the kernel. The initialization upon detection of a batman-adv gateway has been fixed as it could cause the kernel to hang on module unload. Various race conditions triggered by concurrent delete events in the translation table code have been fixed as well. Payload broadcast packets scheduled to be forwarded right on batman-adv disable or module onload are now properly purged to prevent memory leaks. With enabled distributed ARP table (DAT) batman-adv might have answered an ARP request for a local client. An additional mac address check prevents confusing switches in the LAN which rely on ARP to learn behind which port the client is located. Quite some effort was spent to improve the overall code readability, cleanups and coding style issues. batctl ------ To support building batctl in combination with the musl C library the if_ether.h header file is now included from the 'netinet' folder instead of the 'linux' folder because musl does not allow mixing includes from 'netinet' and 'linux' at the same time. alfred ------ Interfaces with more than one link-local addresses are now supported by alfred binding to specific an interfaces and its link-local EUI64 address. All outgoing alfred packets will be originating from that single address. The size of the maximum alfred payload was slightly reduced. This ensures that the UDP/IPv6 stack is able to transfer the push data packets between different alfred servers. Happy routing, The B.A.T.M.A.N. team

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[B.A.T.M.A.N.] pull request: batman-adv 20150811
by Antonio Quartulli 14 Aug '15

14 Aug '15

Hi David, this is our first batch intended for net-next. Here you have all those non-critical fixes/changes that we couldn't merge into the net tree as it was already too late in the release cycle. This is a summary of what each patch does: - patch 1 by Sven Eckelmann is changing the way the GW metric is computed so that the resulting operation does not make use of divisions and also does not lead to any data type promotion. This is a requirement for patch 2; - patch 2 by Ruben Wisniewski is changing the type of the variable used in the same GW metric computation as patch 1 to uint64_t so that potential integer overflows are prevented. Thanks to Sven's patch above no 64bit division will be involved; - patches 3, 4, 5 and 6 by Linus Lüssing are converting plain bitwise operations on capability bits to set/clear/test_bit() in order to ensure their atomicity and prevent potential race conditions; - patch 7, also by Linus, is making the multicast TVLV parsing routine thread-safe in order to prevent potential race conditions upon reception of two OGMs from the same originator at the same time; - patch 8 by Marek Lindner prevents potential double deletions of TT Request objects from its lists which would lead to a kernel crash. - patch 9 by Simon Wunderlich is ensuring that no enqueued packet is leaked when an interface is deactivated; - patch 10 by Linus Lüssing is setting the network header in the skb struct right after a packet was delivered to the batman virtual interface so that subsequent call to ip/ipv6_hdr() do not crash. Please pull or let me know of any problem! Thanks a lot David, Antonio The following changes since commit 07a51cd3794960548627a27aae68c1446341db32: vxlan: fix fdb_dump index calculation (2015-08-10 21:15:18 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batman-adv-for-davem for you to fetch changes up to 125300dd5850a0489b4aacf06e1424a1e34eaefa: batman-adv: Fix potentially broken skb network header access (2015-08-11 18:11:19 +0200) ---------------------------------------------------------------- Included changes: - avoid integer overflow in GW selection routine - prevent race condition by making capability bit changes atomic (use clear/set/test_bit) - fix synchronization issue in mcast tvlv handler - fix crash on double list removal of TT Request objects - fix leak by puring packets enqueued for sending upon iface removal - ensure network header pointer is set in skb ---------------------------------------------------------------- Linus Lüssing (6): batman-adv: Make DAT capability changes atomic batman-adv: Make NC capability changes atomic batman-adv: Make TT capability changes atomic batman-adv: Make MCAST capability changes atomic batman-adv: Fix potential synchronization issues in mcast tvlv handler batman-adv: Fix potentially broken skb network header access Marek Lindner (1): batman-adv: protect tt request from double deletion Ruben Wisniewski (1): batman-adv: Avoid u32 overflow during gateway select Simon Wunderlich (1): batman-adv: remove broadcast packets scheduled for purged outgoing if Sven Eckelmann (1): batman-adv: Replace gw_reselect divisor with simple shift net/batman-adv/distributed-arp-table.c | 7 +-- net/batman-adv/gateway_client.c | 8 +--- net/batman-adv/multicast.c | 81 +++++++++++++++++++++++++--------- net/batman-adv/network-coding.c | 7 +-- net/batman-adv/originator.c | 5 +++ net/batman-adv/send.c | 3 +- net/batman-adv/soft-interface.c | 7 ++- net/batman-adv/translation-table.c | 17 ++++--- net/batman-adv/types.h | 15 ++++--- 9 files changed, 102 insertions(+), 48 deletions(-)

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[B.A.T.M.A.N.] pull request [net]: batman-adv fixes 20150805
by Antonio Quartulli 12 Aug '15

12 Aug '15

Hello David, here you have our patchset for net/linux-4.2 which contains only patches that we think to be important (meaning they fix critical crashes/misbehaviours actually reported by some users). Patch 1 (by me) is preventing DAT from injecting replies received from the mesh into the LAN which would confuse a L2 bridge. Patch 2 introduces several NULL checks in order to prevent spurious kernel crashes due to NULL pointer deferences, by Marek Lindnder. Patches 3, still by Marek, prevent accidental double deletions of tt_local_entry objects from their own lists which would lead to a kernel crash. Patch 4 by Simon Wunderlich fixes a memory leak which is triggered by the missing initialization of the bandwidth_up/down fields of the bat-GW struct. If possible, I'd recommend to consider all these patches for inclusion in the stable releases. Please pull or let me know if anything else is wrong! Thanks a lot David, Antonio The following changes since commit 2475b22526d70234ecfe4a1ff88aed69badefba9: xen-netback: Allocate fraglist early to avoid complex rollback (2015-08-03 22:23:03 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batman-adv-fix-for-davem for you to fetch changes up to 27a4d5efd417b6ef3190e9af357715532d4617a3: batman-adv: initialize up/down values when adding a gateway (2015-08-05 00:31:47 +0200) ---------------------------------------------------------------- Included changes: - prevent DAT from replying on behalf of local clients and confuse L2 bridges - fix crash on double list removal of TT objects (tt_local_entry) - fix crash due to missing NULL checks - initialize bw values for new GWs objects to prevent memory leak ---------------------------------------------------------------- Antonio Quartulli (1): batman-adv: avoid DAT to mess up LAN state Marek Lindner (2): batman-adv: fix kernel crash due to missing NULL checks batman-adv: protect tt_local_entry from concurrent delete events Simon Wunderlich (1): batman-adv: initialize up/down values when adding a gateway net/batman-adv/distributed-arp-table.c | 18 +++++++++++++----- net/batman-adv/gateway_client.c | 2 ++ net/batman-adv/soft-interface.c | 3 +++ net/batman-adv/translation-table.c | 29 ++++++++++++++++++++++++----- 4 files changed, 42 insertions(+), 10 deletions(-)

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B.A.T.M.A.N August 2015