B.A.T.M.A.N February 2017

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

12 participants
28 discussions

[B.A.T.M.A.N.] Distributing Data using BATMAN-Multicast
by Shantanoo Desai 17 Feb '17

17 Feb '17

Hello all, I have developed a Multicast based Data Distribution protocol and would like to compare it with Batman's Multicast feature. I know how to enable the multicast on the the mesh interface but is there any tool or utility I can use to send data over the Mesh network ? scp of sftp won't work since there is no multicast or broadcasting present in them. I would like to compare how quick can data be disseminated in a Batman enabled Mesh network versus the protocol that I have developed over an adhoc network consisting of multiple Raspberry Pis. Any hints would be suggested. Thanks, Shan -- Shantanoo Desai MSc. Communication & Information Tech. Bremen, Germany

4 3

[B.A.T.M.A.N.] Unable to Change from BATMAN_IV to BATMAN_V
by leftbydefault＠riseup.net 17 Feb '17

17 Feb '17

I came across a thread previously on this same issue with respect to openwrt. I tried to change the routing algo following tweaking section of batman wiki as soon as loading the batman_adv module. I am able to see BATMAN_V under availabile algorithms but available for next instance of batx. I understand it has to be done before this bat0 interface is created, but I am doing this before bringing up bat0 using ifconfig batctl 2016.4 batman-adv 2016.4 -- Sent from my phone

2 1

Re: [B.A.T.M.A.N.] [PATCH 3.2 049/126] batman-adv: fix splat on disabling an interface
by Linus Lüssing 16 Feb '17

16 Feb '17

On Wed, Feb 15, 2017 at 10:41:34PM +0000, Ben Hutchings wrote: > 3.2.85-rc1 review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Linus Lüssing <linus.luessing(a)c0d3.blue> > > commit 9799c50372b23ed774791bdb87d700f1286ee8a9 upstream. Hi Ben, This commit was reverted in 27915aa61060fd8954a68a86657784705955088a ('batman-adv: Revert "fix splat on disabling an interface"'). Greg dropped this patch from his stable queue back then, too [0]. Regards, Linus [0]: https://marc.info/?l=linux-kernel&m=147938417410032

2 1

[B.A.T.M.A.N.] [PATCH v7 1/5] batman-adv: prevent multiple ARP replies sent by gateways if dat enabled
by Sven Eckelmann 16 Feb '17

16 Feb '17

From: Andreas Pape <APape(a)phoenixcontact.com> If dat is enabled it must be made sure that only the backbone gw which has claimed the remote destination for the ARP request answers the ARP request directly if the MAC address is known due to the local dat table. This prevents multiple ARP replies in a common backbone if more than one gateway already knows the remote mac searched for in the ARP request. Signed-off-by: Andreas Pape <apape(a)phoenixcontact.com> Acked-by: Simon Wunderlich <sw(a)simonwunderlich.de> [sven(a)narfation.org: fix conflicts with current version] Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/bridge_loop_avoidance.c | 49 ++++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 11 ++++++++ net/batman-adv/distributed-arp-table.c | 15 +++++++++++ 3 files changed, 75 insertions(+) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index e7f690b..41ab4a6 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -2450,3 +2450,52 @@ out: return ret; } + +#ifdef CONFIG_BATMAN_ADV_DAT +/** + * batadv_bla_check_claim - check if address is claimed + * + * @bat_priv: the bat priv with all the soft interface information + * @addr: mac address of which the claim status is checked + * @vid: the VLAN ID + * + * addr is checked if this address is claimed by the local device itself. + * + * Return: true if bla is disabled or the mac is claimed by the device, + * false if the device addr is already claimed by another gateway + */ +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, + u8 *addr, unsigned short vid) +{ + struct batadv_bla_claim search_claim; + struct batadv_bla_claim *claim = NULL; + struct batadv_hard_iface *primary_if = NULL; + bool ret = true; + + if (!atomic_read(&bat_priv->bridge_loop_avoidance)) + return ret; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if) + return ret; + + /* First look if the mac address is claimed */ + ether_addr_copy(search_claim.addr, addr); + search_claim.vid = vid; + + claim = batadv_claim_hash_find(bat_priv, &search_claim); + + /* If there is a claim and we are not owner of the claim, + * return false. + */ + if (claim) { + if (!batadv_compare_eth(claim->backbone_gw->orig, + primary_if->net_dev->dev_addr)) + ret = false; + batadv_claim_put(claim); + } + + batadv_hardif_put(primary_if); + return ret; +} +#endif diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 1ae93e4..86b8740 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -51,6 +51,10 @@ void batadv_bla_status_update(struct net_device *net_dev); int batadv_bla_init(struct batadv_priv *bat_priv); void batadv_bla_free(struct batadv_priv *bat_priv); int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); +#ifdef CONFIG_BATMAN_ADV_DAT +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid); +#endif #define BATADV_BLA_CRC_INIT 0 #else /* ifdef CONFIG_BATMAN_ADV_BLA */ @@ -127,6 +131,13 @@ static inline int batadv_bla_backbone_dump(struct sk_buff *msg, return -EOPNOTSUPP; } +static inline +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid) +{ + return true; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */ #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index e257efd..cf53404 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -43,6 +43,7 @@ #include <linux/workqueue.h> #include <net/arp.h> +#include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "log.h" @@ -1007,6 +1008,20 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, goto out; } + /* If BLA is enabled, only send ARP replies if we have claimed + * the destination for the ARP request or if no one else of + * the backbone gws belonging to our backbone has claimed the + * destination. + */ + if (!batadv_bla_check_claim(bat_priv, + dat_entry->mac_addr, vid)) { + batadv_dbg(BATADV_DBG_DAT, bat_priv, + "Device %pM claimed by another backbone gw. Don't send ARP reply!", + dat_entry->mac_addr); + ret = true; + goto out; + } + skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src, bat_priv->soft_iface, ip_dst, hw_src, dat_entry->mac_addr, hw_src); -- 2.9.3

3 10

[B.A.T.M.A.N.] throughput on wired interfaces?
by dan 15 Feb '17

15 Feb '17

Anyone know what the throughput capacity of batman-adv is? To be more specific, if I have gigabit ethernet interfaces in bat0 on a number of nodes, will batman-adv cause a significant drop in throughput when relaying traffic or cause a significant increase in latency? What about 10G?

1 0

[B.A.T.M.A.N.] how to hand ptp links and still access radio management interfaces
by dan 11 Feb '17

11 Feb '17

I'm trying to figure out the best way to handle this: (bat0-eth1) <===> PTP Radio1 ~~~~~~~ PTP Radio2 <===> (eth1-bat0) (eth1 is in bat0) These radios only have 1 interface (ie, no management interface) so I have to handle their configuration by assigning an IP to the same interface I want to connect into batman-adv. I considered: bat0-bridge-eth1 <===> PTP Radio1 ~~~~~~~ PTP Radio2 <===> eth1-bridge-bat0 but this means the link isn't in the mesh I don't know if this would work: bat0-bridge-eth1 <===> PTP Radio1 ~~~~~~~ PTP Radio2 <===> eth1-bridge-bat0 (bat0-eth1.10)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(bat0-eth1.10) because I don't know if the eth1.10 vlan will be touched by the bridge, or if it will work with bat0 this way. The purpose here is to use higher end radios like a ubiquiti airfiber 5x to reduce hop-counts and increase capacity. Any thoughts?

3 6

[B.A.T.M.A.N.] [PATCH 0/6] batman-adv: broadcast packet aggregation
by Linus Lüssing 09 Feb '17

09 Feb '17

Hi, Here is a first patchset to reintroduce aggregation support for BATMAN V, too - as well as any other packet type with a broadcast destination. Branch: * https://git.open-mesh.org/batman-adv.git/shortlog/refs/heads/linus/aggregat… Regards, Linus PS: Requires: "batman-adv: Introduce packet type independent TVLV handler API" (40e5c9e798ec, available on patchwork or linus/aggregation branch) --- RFC->v1: * removed tvlv (un)pack ctx wrappers * fixed a crash when deaggregating ARP packets * now compile tested down to 3.2, too (no issues found) * now stress tested with multicast traffic of a larger, public mesh setup

2 8

[B.A.T.M.A.N.] bat0 trunk vlans?
by dan 09 Feb '17

09 Feb '17

Assuming MTU is great enough (1528 right? 1500+24 batman-adv+4 VLAN), can the bat0 interface act as trunk for VLANs? 2 Nodes: bat0: eth1 bridge0: eth0|bat0 device connected to node1-eth0 tags vlan20, does that traverse the bat0 mesh and come out node2-eth0 with tag in-tact? Does it traverse node1-eth0 at all? I have another post on how to manage PtP radios in-line a batman-adv link, wondering if I can configure them to a management VLAN bat0-eth0 native vlan bat1-eth0.10 <- radio interface vlan10 ... and if so, how does that effect the possibility of trunking VLANs across bat0. in theory, bat0 fully encapsulates packets entering node1-eth0 so the VLAN is invisible 'outside' batman-adv encapsulation so bat-eth0.10 should work, but I just don't know how batman-adv handles VLANs... thanks

4 3

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

B.A.T.M.A.N February 2017