[#CSubNet-2constructor-02ef]
= xref:CSubNet.adoc[CSubNet]::CSubNet
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `<netaddress.h>`

Construct an invalid subnet (empty, `Match()` always returns false).


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CSubNet/2constructor-02e9.adoc[CSubNet]();
----

[.small]#xref:CSubNet/2constructor-02e9.adoc[_» more..._]#

Construct a single‐host subnet.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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explicit
xref:CSubNet/2constructor-0f.adoc[CSubNet](xref:CNetAddr.adoc[CNetAddr] const& addr);
----

[.small]#xref:CSubNet/2constructor-0f.adoc[_» more..._]#

Construct from a given network start and number of bits (CIDR mask).


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:CSubNet/2constructor-07.adoc[CSubNet](
    xref:CNetAddr.adoc[CNetAddr] const& addr,
    uint8_t mask);
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[.small]#xref:CSubNet/2constructor-07.adoc[_» more..._]#

Construct from a given network start and mask.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:CSubNet/2constructor-01.adoc[CSubNet](
    xref:CNetAddr.adoc[CNetAddr] const& addr,
    xref:CNetAddr.adoc[CNetAddr] const& mask);
----

[.small]#xref:CSubNet/2constructor-01.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *addr* [in]
| The sole address to be contained in the subnet, can also be non‐IPv[46].
| *mask* [in]
| CIDR mask, must be in [0, 32]for IPv4 addresses and in [0, 128]for IPv6 addresses. Otherwise an invalid subnet is created.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#