See Also
 Important: |
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The following table describes IPPROTO_IPV6 Socket Options. See getsockoptand setsockoptfor more information on getting and setting socket options. To enumerate protocols and discover supported properties for each installed protocol, use the WSAEnumProtocolsfunction.
Some socket options require more explanation than these tables can convey; such options contain links to additional pages.
IPPROTO_IPV6
| Option | get/set/both | Optval type | Description |
|---|---|---|---|
|
IPV6_ADD_MEMBERSHIP |
set |
struct ipv6_mreq |
Join the supplied multicast group on the given interface index |
|
IPV6_DROP_MEMBERSHIP |
set |
struct ipv6_mreq |
Leave the supplied multicast group from the given interface |
|
IPV6_HDRINCL |
both |
BOOL |
Indicates IPv6 header will be supplied on all outgoing data |
|
IPV6_HOPLIMIT |
both |
BOOL |
Indicates that hop (TTL) information should be returned in the WSARecvMsg function |
|
IPV6_JOIN_GROUP |
set |
struct ipv6_mreq |
Same as IPV6_ADD_MEMBERSHIP |
|
IPV6_LEAVE_GROUP |
set |
struct ipv6_m |
Same as IPV6_DROP_MEMBERSHIP |
|
IPV6_MULTICAST_HOPS |
both |
DWORD |
Sets/gets the TTL value associated with IPv6 multicast traffic on the socket |
|
IPV6_MULTICAST_IF |
both |
DWORD |
Sets the outgoing (IPv6) interface for multicast traffic. This is important for multihomed machines. The input value is the 4-byte interface index of the desired outgoing interface (use GetAdaptersAddresses to obtain index information). |
|
IPV6_MULTICAST_LOOP |
both |
BOOL |
Indicates multicast data sent on socket will be echoed to the sockets receive buffer if it is also joined on the destination multicast group |
|
IPV6_PKTINFO |
both |
BOOL |
Indicates that packet information should be returned in the WSARecvMsg function |
|
IPV6_PROTECTION_LEVEL |
both |
INT |
Enables restriction of a socket to a specified scope, such as addresses with the same link local or site local prefix. Provides various restriction levels and default settings. See Using IPV6_PROTECTION_LEVELfor more information. |
|
IPV6_UNICAST_HOPS |
both |
DWORD |
Sets/gets the current TTL value associated with IPv6 socket |