On Wed, Dec 1, 2021 at 9:06 AM Martinez, Ricardo <ricardo.martinez@xxxxxxxxxxxxxxx> wrote: > On 11/6/2021 11:08 AM, Sergey Ryazanov wrote: >> On Mon, Nov 1, 2021 at 6:57 AM Ricardo Martinez wrote: >>> +#define IPV4_VERSION 0x40 >>> +#define IPV6_VERSION 0x60 >> >> Just curious why the _VERSION suffix? Why not, for example, PKT_TYPE_ prefix? > > Nothing special about _VERSION, but it does look a bit weird, will use > PKT_TYPE_ as suggested I checked the driver code again and found that these constants are really used to distinguish between IPv4 and IPv6 packets by checking the first byte of the data packet (IP header version field). Now I am wondering, does the modem firmware report a packet type in one of the BAT or PIT headers? If the modem is already reporting a packet type, then it is better to use the provided information instead of touching the packet data. Otherwise, if the modem does not explicitly report a packet type, and you have to check the version field of the IP header, then it seems Ok to keep the names of these constants as they are (with the _VERSION suffix). -- Sergey
