asgardius/android_kernel_motorola_sm6225
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

[BRIDGE]: if no STP then forward all BPDUs

Browse source 
If a bridge is not running STP, then it has no way to detect a cycle
in the network. But if it is not running STP and some other machine
or device is running STP, then if STP BPDU's get forwarded to it can
detect the cycle.

This is how the old 2.4 and early 2.6 code worked.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2007-04-25 22:07:58 -07:00 committed by David S. Miller
parent 2111f8b9e5
commit c2886d6259
1 changed files with 8 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
net/bridge/br_input.c
View file

@ -136,8 +136,14 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
if (skb->protocol == htons(ETH_P_PAUSE))
goto drop;
return (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
NULL, br_handle_local_finish) == 0) ? skb : NULL;
/* Process STP BPDU's through normal netif_receive_skb() path */
if (p->br->stp_enabled != BR_NO_STP) {
if (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
NULL, br_handle_local_finish))
return NULL;
else
return skb;
}
}
switch (p->state) {