| Value |
Constant |
Description |
| 1 |
swOptionBroadcast |
This option specifies that broadcasting should be enabled
for datagrams. This option is invalid for stream sockets. |
| 2 |
swOptionDontRoute |
This option specifies default routing should not be used.
This option should not be specified unless absolutely necessary. |
| 4 |
swOptionKeepAlive |
This option specifies that packets are to be sent to the
remote system when no data is being exchanged to keep the
connection active. This is only valid for stream sockets. |
| &H10 |
swOptionNoDelay |
This option disables the Nagle algorithm. By default, small
amounts of data written to the socket are buffered, increasing
efficiency and reducing network congestion. However, this
buffering can negatively impact the responsiveness of certain
applications. This option disables this buffering and
immediately sends data packets as they are written to the
socket. |
| &H20 |
swOptionInLine |
This option specifies that out-of-band data should be
received inline with the standard data stream. This option is
only valid for stream sockets. |
| &H800 |
swOptionTrustedSite |
This option specifies the server is trusted. The server
certificate will not be validated and the connection will always
be permitted. This option only affects connections using either
the SSL or TLS protocols. |
| &H1000 |
swOptionSecure |
This option specifies that a secure connection should be
established with the remote host. The specific version of TLS
can be specified by setting the SecureProtocol
property. By default, the connection will use TLS 1.2
and the strongest cipher suites available. Older versions
of Windows prior to Windows 7 and Windows Server 2008 R2 only
support TLS 1.0 and secure connections will automatically
downgrade on those platforms. |
| &H8000 |
swOptionSecureFallback |
This option specifies the client should permit the use
of less secure cipher suites for compatibility with legacy
servers. If this option is specified, the client will allow
connections using TLS 1.0 and cipher suites that use RC4, MD5
and SHA1. |
| &H40000 |
swOptionPreferIPv6 |
This option specifies the client should prefer the use of
IPv6 if the server hostname can be resolved to both an IPv6 and
IPv4 address. This option is ignored if the local system does
not have IPv6 enabled, or when the hostname can only be resolved
to an IPv4 address. If the server hostname can only be resolved
to an IPv6 address, the client will attempt to establish a
connection using IPv6 regardless if this option has been
specified. |