commits September 2019

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Broadcast (5a22fa5)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit 5a22fa56ba5991c727fa103a711ebe97cef90ee7 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Sat May 4 00:58:11 2019 +0000 doc: batman-adv/Broadcast >--------------------------------------------------------------- 5a22fa56ba5991c727fa103a711ebe97cef90ee7 batman-adv/Broadcast.textile | 4 ---- 1 file changed, 4 deletions(-) diff --git a/batman-adv/Broadcast.textile b/batman-adv/Broadcast.textile index 095f207..920de22 100644 --- a/batman-adv/Broadcast.textile +++ b/batman-adv/Broadcast.textile @@ -75,7 +75,3 @@ h3. Distributed ARP Table: DHT and Caching h3. IP Multicast Optimizations * See: [[Multicast-optimizations|Multicast Optimizations]] \ No newline at end of file - -h3. __noflood__ Firewall Tagging - -WIP \ No newline at end of file

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Noflood-broadcast-prevention (d37b2cc)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit d37b2cc715faf93a2de60e56b620c7cc22c72d20 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Tue May 7 09:35:29 2019 +0000 doc: batman-adv/Noflood-broadcast-prevention >--------------------------------------------------------------- d37b2cc715faf93a2de60e56b620c7cc22c72d20 batman-adv/Noflood-broadcast-prevention.textile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/batman-adv/Noflood-broadcast-prevention.textile b/batman-adv/Noflood-broadcast-prevention.textile index f21406a..b27d815 100644 --- a/batman-adv/Noflood-broadcast-prevention.textile +++ b/batman-adv/Noflood-broadcast-prevention.textile @@ -1,3 +1,7 @@ +Prior Readings: + +* [[Broadcast|Broadcasts in B.A.T.M.A.N. Advanced]] + h1. "Noflood"-mark: Broadcast Flood Prevention !{width:25%}noflood-sign.png!

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Feature-History (707c941)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit 707c9411a4a031af1117a3e5a8865df407cd9218 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Thu May 23 12:07:44 2019 +0000 doc: batman-adv/Feature-History >--------------------------------------------------------------- 707c9411a4a031af1117a3e5a8865df407cd9218 batman-adv/Feature-History.textile | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/batman-adv/Feature-History.textile b/batman-adv/Feature-History.textile index e4a8447..d624eef 100644 --- a/batman-adv/Feature-History.textile +++ b/batman-adv/Feature-History.textile @@ -30,8 +30,6 @@ h1. Feature History ** Multicast TT + TVLV support: v2014.2.0 ** Bridge support: v2016.3 ** Multicast-to-multi-unicast: v2019.2 -* *Netlink* -** v2016.3 (+ v2016.4, v2016.5, ...) * *Network Coding* ** v2013.2.0 * *BATMAN IV* @@ -49,3 +47,4 @@ h1. Feature History * *Misc:* ** Hop-penalty 15 -> 30: v2014.4.0 (and in v2012.2.0? how much?) ** Multiple mesh interfaces: v2010.2.0 +** Netlink: v2016.3 (+ v2016.4, v2016.5, ...) \ No newline at end of file

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Extended-isolation: don't reference deprecated sysfs files (fbaa5a2)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit fbaa5a2317b3e1109473fa021a0cad45964323c3 Author: Sven Eckelmann <sven(a)narfation.org> Date: Sun Mar 3 19:36:23 2019 +0000 doc: batman-adv/Extended-isolation: don't reference deprecated sysfs files >--------------------------------------------------------------- fbaa5a2317b3e1109473fa021a0cad45964323c3 batman-adv/Extended-isolation.textile | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/batman-adv/Extended-isolation.textile b/batman-adv/Extended-isolation.textile index 7aeaff7..32f8f42 100644 --- a/batman-adv/Extended-isolation.textile +++ b/batman-adv/Extended-isolation.textile @@ -22,8 +22,6 @@ With these commands, all the the packets coming in through _eth1_ will be marked The next step it is to configure batman-adv properly, meaning that the user must tell the kernel module which is the value to match in the _skb->mark_ field when detecting isolated clients. <pre> -# echo 6/0xffffffff >/sys/devices/virtual/net/bat0/mesh/isolation_mark -or # batctl isola 0x06/0xFFFFFFFF # VALUE/MASK </pre> @@ -49,12 +47,12 @@ h3. How to drop broadcast traffic Following the example reported in the previous sections, a set of tc commands can help to drop all the broadcast packets having been marked with a given fwmark: <pre> # tc qdisc add dev eth1 root handle 1: prio -# tc qdisc add dev eth1 parent 1:3 handle 30: netem loss 100%25 +# tc qdisc add dev eth1 parent 1:3 handle 30: netem loss 100% # tc filter add dev eth1 parent 1:0 protocol all prio 1 handle 6 fw classid 1:3 </pre> With this instructions two task are accomplished: -# a netem queue is created telling to drop 100%25 of the packets entering it +# a netem queue is created telling to drop 100% of the packets entering it # a filter rule is added in order to redirect all the traffic matching the specified mark to the netem queue. Note that _tc_ is used instead of iptables because the latter would only be able to work on frames carrying IPv4/6 packets, while in this case the target is the entire traffic.

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Tweaking (f9bc060)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit f9bc060118e602d9b6e0168e77ef7c18be759006 Author: Sven Eckelmann <sven(a)narfation.org> Date: Thu Jun 13 21:15:04 2019 +0000 doc: batman-adv/Tweaking >--------------------------------------------------------------- f9bc060118e602d9b6e0168e77ef7c18be759006 batman-adv/Tweaking.textile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/batman-adv/Tweaking.textile b/batman-adv/Tweaking.textile index 15beb2b..4103457 100644 --- a/batman-adv/Tweaking.textile +++ b/batman-adv/Tweaking.textile @@ -266,11 +266,11 @@ The batX mesh interface created by batman-adv also supports VLANs which enables For example, after adding VLAN 0 and VLAN 1 on top of bat0, the commands can be accessed via the vlan interface name: <pre> # vlan 1 -batctl -m bat0.1 ap_isolation +batctl -m bat0 vid 1 ap_isolation disabled # vlan 0 -batctl -m bat0.0 ap_isolation +batctl -m bat0 vid 0 ap_isolation disabled </pre> @@ -281,6 +281,6 @@ Available since: batman-adv 2014.0.0 Standard WiFi AccessPoints support a feature known as 'AP isolation' which prevents one connected wireless client to talk to another wireless client. In most situations this is considered a security feature. If the WiFi AP interface is bridged into a batman-adv mesh network it might be desirable to extend this wireless client isolation throughout the mesh network, therefore batman-adv has the ability to do just that (disabled by default). <pre> -batctl -m bat0.1 ap_isolation +batctl -m bat0 vid 1 ap_isolation disabled </pre> \ No newline at end of file

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/BATMAN_V_Tests: don't reference deprecated sysfs files (585dfc5)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

1 0

[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Noflood-broadcast-prevention (7908858)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit 7908858fd32a541039bfe083d944e57d0e1e19f6 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Sat May 4 03:52:59 2019 +0000 doc: batman-adv/Noflood-broadcast-prevention >--------------------------------------------------------------- 7908858fd32a541039bfe083d944e57d0e1e19f6 batman-adv/Noflood-broadcast-prevention.textile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/batman-adv/Noflood-broadcast-prevention.textile b/batman-adv/Noflood-broadcast-prevention.textile index 4591013..4ca7744 100644 --- a/batman-adv/Noflood-broadcast-prevention.textile +++ b/batman-adv/Noflood-broadcast-prevention.textile @@ -47,3 +47,5 @@ The batctl command configures the value and mask batman-adv should watch out for The first ebtables command makes sure that link-local IPv6 multicast is never matched for flood prevention. If this rule matches then the firewall will hand over the frame without a mark. The second ebtables rule marks any IPv6 multicast frame which is not a link-local one. For instance multicast packets with a global destination scope. + +batman-adv will then drop such multicast packets with a global destination scope if for example it is unable to distribute it via individual unicast transmissions and would fall back to broadcast flooding. \ No newline at end of file

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Broadcast (7231bb5)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit 7231bb5f5e3457478d5b38f04dc697f32455366f Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri May 3 23:09:23 2019 +0000 doc: batman-adv/Broadcast >--------------------------------------------------------------- 7231bb5f5e3457478d5b38f04dc697f32455366f batman-adv/Broadcast.textile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/batman-adv/Broadcast.textile b/batman-adv/Broadcast.textile index 8277cae..62107cb 100644 --- a/batman-adv/Broadcast.textile +++ b/batman-adv/Broadcast.textile @@ -12,11 +12,14 @@ The basic algorithm used by batman-adv is __classic flooding__. Here every node To avoid frames looping around forever (a broadcast storm) an originating batman-adv node tags the frame with a sequence number which increases with every new broadcast frame this node transmits. The sequence number allows other nodes to detect whether it received a frame before. Such duplicates will then simply be ignored. - h2. Interface Type: WiFi vs. Others In 802.11 based wireless networks broadcast transmissions have one specific downside compared to unicast: While for unicast transmissions a missing frame is detected and retransmitted ("ARQ":https://en.wikipedia.org/wiki/Automatic_repeat_request). +To compensate for that batman-adv (re-)broadcasts a frame on a wireless interface not just once but three times when classic flooding is used. + +Furthermore, for the second and third broadcast a delay of 5ms is applied for each to increase the probability that one of the broadcasts arrives. + h2. Gateway Feature: DHCP Optimizations todo

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[doc] backup-redmine/2019-09-14, master: doc: batman-adv/Broadcast (8648733)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-09-14,master >--------------------------------------------------------------- commit 8648733baf9cb2603ca456a037d12a6db964b1b8 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri May 3 22:57:28 2019 +0000 doc: batman-adv/Broadcast >--------------------------------------------------------------- 8648733baf9cb2603ca456a037d12a6db964b1b8 batman-adv/Broadcast.textile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/batman-adv/Broadcast.textile b/batman-adv/Broadcast.textile index dbaa81f..8277cae 100644 --- a/batman-adv/Broadcast.textile +++ b/batman-adv/Broadcast.textile @@ -1,4 +1,4 @@ -h1. Broadcast +h1. Broadcasts in B.A.T.M.A.N. Advanced !broadcast.png!

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[doc] backup-redmine/2019-09-14, master: doc: open-mesh/Emulation: don't reference deprecated debugfs files (2ac1f91)
by postmaster＠open-mesh.org 15 Sep '19

15 Sep '19

1 0

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commits September 2019