ost::IPV4Mask(3)

📦 version 1.8.1, in ubuntu jammy

💖 ost::IPV4Mask 💖 — from the Library Functions Manual (section 3, bestie)

okay so picture this: you're out here doing subnet math and you need an address that's literally just a mask, like 255.255.255.0? yeah. that's this. welcome to the group chat. 🎀

✨ NAME ✨

ost::IPV4Mask — Internet addresses used specifically as masking addresses (such as ' 255.255.255.0') are held in the IPV4Mask derived object.

✨ SYNOPSIS ✨

#include <address.h>

Inherits ost::IPV4Address. 💅

🌸 Public Member Functions 🌸

IPV4Mask (const char *mask) — Create the mask from a null terminated ASCII string such as '255.255.255.128'.
IPV4Address & operator= (unsigned long addr) — Allows assignment from the return of functions like inet_addr() or htonl()

🦋 Friends 🦋

__EXPORT IPV4Host operator& (const IPV4Host &addr, const IPV4Mask &mask) — Masks are usually used to coerce host addresses into a specific router or class domain.

🌈 Additional Inherited Members 🌈

(they're inherited, they're giving legacy, they're fine, moving on 💜)

✨ Detailed Description ✨

Internet addresses used specifically as masking addresses (such as ' 255.255.255.0') are held in the IPV4Mask derived object. 🫶

The separate class is used so that C++ type casting can automatically determine when an IPV4Address object is really a mask address object rather than simply using the base class. This also allows manipulative operators for address masking to operate only when presented with a Masked address as well as providing cleaner and safer source. cleaner and safer source?? we love to see it. ✨

Author

David Sugar dyfet@ostel.com

Internet Address Mask such as subnet masks. 👑

✨ Constructor & Destructor Documentation ✨

💖 ost::IPV4Mask::IPV4Mask (const char * mask)

Create the mask from a null terminated ASCII string such as '255.255.255.128'.

Parameters

mask — null terminated ASCII mask string.

✨ Member Function Documentation ✨

💖 IPV4Address& ost::IPV4Mask::operator= (unsigned long addr) [inline]

Allows assignment from the return of functions like inet_addr() or htonl()

References ost::IPV4Address::operator=().

💖 __EXPORT IPV4Host operator& (const IPV4Host & addr, const IPV4Mask & mask) [friend]

Masks are usually used to coerce host addresses into a specific router or class domain. This can be done by taking the Inet Host Address object and 'and'ing it with an address mask. This operation can be directly expressed in C++ through the & operator.

Returns

a internet host address that has been masked.