selftests: mptcp: avoid calling pm_nl_ctl with bad IDs
IDs are supposed to be between 0 and 255. In pm_nl_ctl, for both the 'add' and 'get' instruction, the ID is casted in a u_int8_t. So if we give 256, we will delete ID 0. Obviously, the goal is not to delete this ID by giving 256. We could modify pm_nl_ctl and stop if the ID is negative or higher than 255 but probably better not to increase the number of lines for such things in this tool which is only used in selftests. Instead, we use it within the limits. This modification also means that we will no longer add a new ID for the 2nd entry. That's why we removed an expected entry from the dump and introduced with commit dc8eb10e ("selftests: mptcp: add testcases for setting the address ID"). So now we delete ID 9 like before and we add entries for IDs 10 to 255 that are deleted just after. Note that this could be seen as a fix but it was not really an issue so far: we were simply playing with ID 0/1 once again. With the following commit ("selftests: mptcp: add addr argument for del_addr"), it will be different because ID 0 is going to required an address. We don't want errors when trying to delete ID 0 without the address argument. Acked-and-tested-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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