Re: [PATCH] SocketCAN support for libpcap - draft implementation

["Gianluca Varenni" <gianluca.varenni () cacetech com>]

> Presumably aligned(8) means "align on an 8-byte boundary"; if canid_t  
> is a 32-bit quantity, then there should be 3 bytes of padding on *all*  
> platforms.
>
> However, if you're using DLT_CAN20B, what matters here is what  
> *existing* software that uses DLT_CAN20B expects; you would have to  
> arrange to make the frame look like that, regardless of whether it  
> matches "struct can_frame" or not, or you would have to request a  
> different DLT_ value, e.g. DLT_CAN20B_LINUX or DLT_CAN20B_SOCKETCAN or  
> something such as that.
>
> Gianluca, what does the header look like in a DLT_CAN20B packet?


The spec is here

http://www.winpcap.org/gianluca/can.html

Have a nice day
GV
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