- update about nibble label support
- comment fix - do not touch dst region if len == 0
if the user used setsockopt(IP_MULTICAST_IF), return the current interface address on getsockopt(IP_MULTICAST_IF), just like it used to.
multicast set/getsockopts, by using 0.0.0.0/8 (= pass it as network endian value, 24bit in in_addr). follows RFC1724 section 3.3. suggested by Dave Thaler.
following RFC1724 section 3.3. suggested by Dave Thaler.
set of syscalls, otherwise there's race condition possibility. commented from deraadt put NOTREACHED.
with unknown next header.