Socket†
level†
Whether the request applies to the socket itself or
the underlying protocol being used.
Supported values are:
- IPPROTO_IP : Request applies to IP protocol layer.
- IPPROTO_TCP : Request applies to TCP protocol layer.
- SOL_SOCKET : Request applies to socket layer.
- IPPROTO_IPV6 : Request applies to IPv6 protocol layer.
- IPPROTO_ICMPV6 : Request applies to ICMPv6 protocol layer.
option_name†
Socket Layer†
- SO_PRIORITY
- SO_BROADCAST
- SO_RCVBUF
- SO_KEEPALIVE
IP Layer†
(例)
- IP_TOS
- IP_TTL
- IP_MULTICAST_LOOP
IPv6 Layer†
- IPV6_UNICAST_HOPS
- IPV6_MULTICAST_IF