getsockopt(IPV6_TCLASS) should return the system default (not -1) when no explicit value was specified.
getsockopt(IPV6_TCLASS) should return the system default (not -1) when
no explicit value was specified.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame