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Date:   Fri, 7 Aug 2020 15:15:52 +0200
From:   Oleksij Rempel <>
To:     Zhang Changzhong <>
Subject: Re: [PATCH net 0/4] support multipacket broadcast message

On Fri, Aug 07, 2020 at 05:36:38PM +0800, Zhang Changzhong wrote:
> Hi Oleksij,
> We have tested this j1939 stack according to SAE J1939-21. It works fine for
> most cases, but when we test multipacket broadcast message function we found
> the receiver can't receive those packets.
> You can reproduce on CAN bus or vcan, for vcan case use cangw to connect vcan0
> and vcan1:
> sudo cangw -A -s vcan0 -d vcan1 -e
> sudo cangw -A -s vcan1 -d vcan0 -e
> To reproduce it use following commands:
> testj1939 -B -r vcan1:0x90 &
> testj1939 -B -s20 vcan0:0x80 :,0x12300
> Besides, candump receives correct packets while testj1939 receives nothing.

Ok, thank you!

i'm able to reproduce it and added following test:

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