APR::IpSubnet(3) Perl API for accessing APRs ip_subnet structures

Synopsis

  use APR::IpSubnet ();
  
  my $ipsub = APR::IpSubnet->new($pool, "127.0.0.1");
  $ok = $ipsub->test($sock_addr);

Description

"APR::IpSubnet" object represents a range of IP addresses (IPv4/IPv6). A socket connection can be matched against this range to test whether the IP it's coming from is inside or outside of this range.

API

"APR::IpSubnet" provides the following functions and/or methods:

new

Create an IP subnet represenation object 

  $ipsubnet = APR::IpSubnet->new($pool, $ip);
  $ipsubnet = APR::IpSubnet->new($pool, $ip, $mask_or_numbits);
obj: "APR::IpSubnet" (class name)
arg1: $pool ( "APR::Pool object" )
arg2: $ip ( string )
IP address in one of the two formats: IPv4 (e.g. ``127.0.0.1'') or IPv6 (e.g. ``::1''). IPv6 addresses are accepted only if APR has the IPv6 support enabled.
opt arg3: $mask_or_numbits ( string )
An optional IP mask (e.g. ``255.0.0.0'') or number of bits (e.g. ``15'').

If none provided, the default is not to mask off.

ret: $ret ( "APR::IpSubnet object" )
The IP-subnet object
excpt: "APR::Error"
since: 2.0.00

test

Test the IP address in the socket address object against a pre-built ip-subnet representation. 

  $ret = $ipsub->test($sockaddr);
obj: $ipsub ( "APR::IpSubnet object" )
The ip-subnet representation
arg1: $sockaddr ( "APR::SockAddr object" )
The socket address to test
ret: $ret ( boolean )
true if the socket address is within the subnet, false otherwise
since: 2.0.00

This method is used for testing whether or not an address is within a subnet. It's used by module "mod_access" to check whether the client IP fits into the IP range, supplied by "Allow"/"Deny" directives.

Example:

Allow accesses only from the localhost (IPv4): 

  use APR::IpSubnet ();
  use Apache2::Connection ();
  use Apache2::RequestRec ();
  my $ipsub = APR::IpSubnet->new($r->pool, "127.0.0.1");
  ok $ipsub->test($r->connection->remote_addr);

See Also

mod_perl 2.0 documentation.

Copyright

mod_perl 2.0 and its core modules are copyrighted under The Apache Software License, Version 2.0.

Authors

The mod_perl development team and numerous contributors.

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