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Date: Thu, 19 Feb 2015 01:15:44 +0100 From: Nikolay Aleksandrov <nikolay@...hat.com> To: Mahesh Bandewar <maheshb@...gle.com>, Jay Vosburgh <j.vosburgh@...il.com>, Andy Gospodarek <andy@...yhouse.net>, Veaceslav Falico <vfalico@...il.com>, David Miller <davem@...emloft.net> CC: Maciej Zenczykowski <maze@...gle.com>, netdev <netdev@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com> Subject: Re: [PATCH next v5 5/6] bonding: Allow userspace to set actors' macaddr in an AD-system. On 02/18/2015 11:31 PM, Mahesh Bandewar wrote: > In an AD system, the communication between actor and partner is the > business between these two entities. In the current setup anyone on the > same L2 can "guess" the LACPDU contents and then possibly send the > spoofed LACPDUs and trick the partner causing connectivity issues for > the AD system. This patch allows to use a random mac-address obscuring > it's identity making it harder for someone in the L2 is do the same thing. > > This patch allows user-space to choose the mac-address for the AD-system. > This mac-address can not be NULL or a Multicast. If the mac-address is set > from user-space; kernel will honor it and will not overwrite it. In the > absence (value from user space); the logic will default to using the > masters' mac as the mac-address for the AD-system. > > It can be set using example code below - > > # modprobe bonding mode=4 > # sys_mac_addr=$(printf '%02x:%02x:%02x:%02x:%02x:%02x' \ > $(( (RANDOM & 0xFE) | 0x02 )) \ > $(( RANDOM & 0xFF )) \ > $(( RANDOM & 0xFF )) \ > $(( RANDOM & 0xFF )) \ > $(( RANDOM & 0xFF )) \ > $(( RANDOM & 0xFF ))) > # echo $sys_mac_addr > /sys/class/net/bond0/bonding/ad_actor_system > # echo +eth1 > /sys/class/net/bond0/bonding/slaves > ... > # ip link set bond0 up > > Signed-off-by: Mahesh Bandewar <maheshb@...gle.com> > --- > v1: > Initial version > v2: > Renamed ad_actor_system_mac_address to ad_actor_system > v3: > Fixed commit message. > v4: > Rebase > v5: > Cosmetic changes > > Documentation/networking/bonding.txt | 12 ++++++++++++ > drivers/net/bonding/bond_3ad.c | 7 ++++++- > drivers/net/bonding/bond_main.c | 1 + > drivers/net/bonding/bond_options.c | 29 +++++++++++++++++++++++++++++ > drivers/net/bonding/bond_procfs.c | 6 ++++++ > drivers/net/bonding/bond_sysfs.c | 15 +++++++++++++++ > include/net/bond_options.h | 1 + > include/net/bonding.h | 1 + > 8 files changed, 71 insertions(+), 1 deletion(-) > Reviewed-by: Nikolay Aleksandrov <nikolay@...hat.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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