B.A.T.M.A.N July 2018

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

10 participants
18 discussions

[B.A.T.M.A.N.] Issue with mesh network on different RTL chipsets
by Francesco Salvatore [fabbricadigitale] 19 Jul '18

19 Jul '18

Hi, we are trying to build a mesh network on Raspberry Pi boards with some USB Wi-Fi adapters that have different Realtek chipsets and, consequently, different drivers. Specifically we have: Gateway => driver rtl8812au (probably the chipset is rtl8811a) Client => driver rtl8821cu (probably the chipset is rtl8811u) We are using Raspbian with kernel 4.14.34-v7+ and we tried using built-in kernel version of batman-adv (2017.3) and then with latest stable (2018.2), built with all compile flags active, less than network coding option. The problem is (seems to be) related to client > gateway communication, specifically in receive capability of the gateway if we use the scenario described above. The client is able to join the network because gateway recognises it as an originator and the client correctly recognises the gateway, but even so no client network traffic is visible on the gateway. For example, the client is unable to obtain an IP address from DHCP server; we can see DHCPOFFER packet on the client (dumping with tcpdump) but we cannot see the same packet transit through the gateway. The client is also unable to ping or traceroute other neighbours or even the gateway. We also tried to disable, one by one, multicast optimization, bridge loop avoidance, fragmentation and so forth, but unfortunately without success. All test were made using batctl tools (ping, traceroute, tcpdump etc.). In other cases, i.e. if we swap the roles (using rtl8812au as client and rtl8821cu as gateway) or if we use same chipset both for client and gateway, we have no issue at all. Do you know if there's any issue related to listed hardware chipsets? If yes, you know of some action I can take to fix that problem? Thank you, have a nice day!

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[B.A.T.M.A.N.] [PATCH 0/6] pull request for net: batman-adv 2018-07-17
by Simon Wunderlich 18 Jul '18

18 Jul '18

Hi David, here are some batman-adv bugfixes for net. Please pull or let me know of any problem! Thank you, Simon The following changes since commit ce397d215ccd07b8ae3f71db689aedb85d56ab40: Linux 4.18-rc1 (2018-06-17 08:04:49 +0900) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-net-for-davem-20180717 for you to fetch changes up to a44ebeff6bbd6ef50db41b4195fca87b21aefd20: batman-adv: Fix multicast TT issues with bogus ROAM flags (2018-06-23 10:29:33 +0200) ---------------------------------------------------------------- Here are some batman-adv fixes: - Fix gateway refcounting in BATMAN IV and V, by Sven Eckelmann (2 patches) - Fix debugfs paths when renaming interfaces, by Sven Eckelmann (2 patches) - Fix TT flag issues, by Linus Luessing (2 patches) ---------------------------------------------------------------- Linus Lüssing (2): batman-adv: Avoid storing non-TT-sync flags on singular entries too batman-adv: Fix multicast TT issues with bogus ROAM flags Sven Eckelmann (4): batman-adv: Fix bat_ogm_iv best gw refcnt after netlink dump batman-adv: Fix bat_v best gw refcnt after netlink dump batman-adv: Fix debugfs path for renamed hardif batman-adv: Fix debugfs path for renamed softif net/batman-adv/bat_iv_ogm.c | 4 +++- net/batman-adv/bat_v.c | 4 +++- net/batman-adv/debugfs.c | 40 ++++++++++++++++++++++++++++++++++++++ net/batman-adv/debugfs.h | 11 +++++++++++ net/batman-adv/hard-interface.c | 37 +++++++++++++++++++++++++++++------ net/batman-adv/translation-table.c | 7 +++++-- 6 files changed, 93 insertions(+), 10 deletions(-)

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[B.A.T.M.A.N.] [PATCH 0/7] pull request for net-next: batman-adv 2018-07-17
by Simon Wunderlich 18 Jul '18

18 Jul '18

Hi David, here is a little cleanup pull request of batman-adv to go into net-next. Please pull or let me know of any problem! Thank you, Simon The following changes since commit ce397d215ccd07b8ae3f71db689aedb85d56ab40: Linux 4.18-rc1 (2018-06-17 08:04:49 +0900) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-next-for-davem-20180717 for you to fetch changes up to 993a4a5f7cd3aef53be3953d11f86b2d3630ebb8: batman-adv: Convert batadv_dat_addr_t to proper type (2018-07-08 12:56:38 +0200) ---------------------------------------------------------------- This feature/cleanup patchset includes the following patches: - Don't call BATMAN_V experimental in Kconfig anymore, by Sven Eckelmann - Enable DAT by default at compile time, by Antonio Quartulli - Remove obsolete default n in Kconfig, by Sven Eckelmann - Fix checkpatch spelling errors, by Sven Eckelmann - Unify header guards style, by Sven Eckelmann - Consolidate batadv_purge_orig functions, by Sven Eckelmann - Replace type define with proper typedef, by Sven Eckelmann ---------------------------------------------------------------- Antonio Quartulli (1): batman-adv: enable DAT by default at compile time Sven Eckelmann (6): batman-adv: Drop "experimental" from BATMAN_V Kconfig batman-adv: Remove "default n" in Kconfig batman-adv: fix checkpatch warning about misspelled "cache" batman-adv: Unify include guards style batman-adv: Join batadv_purge_orig_ref and _batadv_purge_orig batman-adv: Convert batadv_dat_addr_t to proper type net/batman-adv/Kconfig | 8 ++------ net/batman-adv/bat_iv_ogm.h | 6 +++--- net/batman-adv/bat_v_ogm.h | 6 +++--- net/batman-adv/debugfs.c | 2 +- net/batman-adv/originator.c | 17 ++++++----------- net/batman-adv/types.h | 7 ++++--- 6 files changed, 19 insertions(+), 27 deletions(-)

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[B.A.T.M.A.N.] [PATCH] batman-adv: fix checkpatch warning about misspelled "cache"
by Sven Eckelmann 17 Jul '18

17 Jul '18

commit a2d4df9b673c ("spelling.txt: add more spellings to spelling.txt") introduced the spellcheck of "cache" for checkpatch.pl. Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c index 87479c60..3cb82378 100644 --- a/net/batman-adv/debugfs.c +++ b/net/batman-adv/debugfs.c @@ -118,7 +118,7 @@ static int batadv_bla_backbone_table_open(struct inode *inode, #ifdef CONFIG_BATMAN_ADV_DAT /** - * batadv_dat_cache_open() - Prepare file handler for reads from dat_chache + * batadv_dat_cache_open() - Prepare file handler for reads from dat_cache * @inode: inode which was opened * @file: file handle to be initialized * -- 2.11.0

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[B.A.T.M.A.N.] [PATCH v2 1/2] batman-adv: Remove "default n" in Kconfig
by Sven Eckelmann 17 Jul '18

17 Jul '18

The "default n" is the default value for any bool or tristate Kconfig setting. It is therefore not necessary to add it to a config entry. Reported-by: Sergei Shtylyov <sergei.shtylyov(a)cogentembedded.com> Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- v2: changed "the an config entry" to "a config entry" in commit message net/batman-adv/Kconfig | 5 ----- 1 file changed, 5 deletions(-) diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig index de8034d80623..41bb67d70c83 100644 --- a/net/batman-adv/Kconfig +++ b/net/batman-adv/Kconfig @@ -24,7 +24,6 @@ config BATMAN_ADV depends on NET select CRC16 select LIBCRC32C - default n help B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing protocol for multi-hop ad-hoc mesh networks. The @@ -60,7 +59,6 @@ config BATMAN_ADV_BLA config BATMAN_ADV_DAT bool "Distributed ARP Table" depends on BATMAN_ADV && INET - default n help This option enables DAT (Distributed ARP Table), a DHT based mechanism that increases ARP reliability on sparse wireless @@ -70,7 +68,6 @@ config BATMAN_ADV_DAT config BATMAN_ADV_NC bool "Network Coding" depends on BATMAN_ADV - default n help This option enables network coding, a mechanism that aims to increase the overall network throughput by fusing multiple @@ -84,7 +81,6 @@ config BATMAN_ADV_NC config BATMAN_ADV_MCAST bool "Multicast optimisation" depends on BATMAN_ADV && INET && !(BRIDGE=m && BATMAN_ADV=y) - default n help This option enables the multicast optimisation which aims to reduce the air overhead while improving the reliability of @@ -94,7 +90,6 @@ config BATMAN_ADV_DEBUGFS bool "batman-adv debugfs entries" depends on BATMAN_ADV depends on DEBUG_FS - default n help Enable this to export routing related debug tables via debugfs. The information for each soft-interface and used hard-interface can be -- 2.17.0

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[B.A.T.M.A.N.] [RFC 0/2] batman-adv: Default build sync with Kconfig
by Sven Eckelmann 17 Jul '18

17 Jul '18

Hi, yes, this is a rather harsh reminder that you should keep your settings in Kconfig and the out-of-tree module Makefiles in sync. Please submit an alternate patch (with a good commit message) for net/batman-adv/Kconfig when you want to keep the feature enabled by default. Kind regards, Sven Sven Eckelmann (2): batman-adv: Disable DAT during compilation batman-adv: Disable MCAST during compilation Makefile | 4 ++-- README.external.rst | 4 ++-- gen-compat-autoconf.sh | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) -- 2.17.0

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[B.A.T.M.A.N.] [PATCH 0/3] batman-adv: Minor cleanups
by Sven Eckelmann 17 Jul '18

17 Jul '18

Hi, this mini patchset contains some minor cleanups which are on my HDD since a longer time but were never submitted. They still didn't reach a critical mass - but they will not get better with age. Kind regards, Sven Sven Eckelmann (3): batman-adv: Unify include guards style batman-adv: Join batadv_purge_orig_ref and _batadv_purge_orig batman-adv: Convert batadv_dat_addr_t to proper type net/batman-adv/bat_iv_ogm.h | 6 +++--- net/batman-adv/bat_v_ogm.h | 6 +++--- net/batman-adv/originator.c | 17 ++++++----------- net/batman-adv/types.h | 7 ++++--- 4 files changed, 16 insertions(+), 20 deletions(-) -- 2.18.0

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[B.A.T.M.A.N.] What is link throughput used for?
by dan 07 Jul '18

07 Jul '18

I'm not finding a document describing how link throughput is used in routing decisions but I see in 2016.1 setting this value (and the default of learning it) are described: Throughput override Available since: batman-adv 2016.1 Defines the throughput value to be used by B.A.T.M.A.N. V when estimating the link throughput for all neighbors connected to this interface. If the value is set to 0 then batman-adv will try to estimate the throughput by itself by either querying the WiFi driver or the Ethernet interface. B.A.T.M.A.N. IV ignores the setting entirely. cat /sys/class/net/eth0/batman_adv/throughput_override 0.0 MBit How is this used? Where's the documentation? Thanks.

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B.A.T.M.A.N July 2018