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Moodle 4.4.1 (Build: 20240610) (db07c09afc5)
core\ip_utils Class Reference

Static helper class providing some useful internet-protocol-related functions. More...

Static Public Member Functions

static get_ip_address (string $hostname)
 Return IP address for given hostname, or null on failure.
 
static is_domain_in_allowed_list ($domain, $alloweddomains)
 Checks the domain name against a list of allowed domains.
 
static is_domain_matching_pattern ($pattern)
 Checks whether the input string is a valid wildcard domain matching pattern.
 
static is_domain_name ($domainname)
 Syntax checking for domain names, including fully qualified domain names.
 
static is_ip_address ($address)
 Syntax validation for IP addresses, supporting both IPv4 and Ipv6 formats.
 
static is_ip_in_subnet_list ($ip, $list, $delim="\n")
 Is an ip in a given list of subnets?
 
static is_ipv4_address ($address)
 Syntax validation for IPv4 addresses.
 
static is_ipv4_range ($addressrange)
 Syntax checking for IPv4 address ranges.
 
static is_ipv6_address ($address)
 Syntax validation for IPv6 addresses.
 
static is_ipv6_range ($addressrange)
 Syntax validation for IPv6 address ranges.
 

Detailed Description

Static helper class providing some useful internet-protocol-related functions.

License
http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
Author
Jake Dallimore jrhda.nosp@m.llim.nosp@m.ore@g.nosp@m.mail.nosp@m..com

Member Function Documentation

◆ get_ip_address()

static core\ip_utils::get_ip_address ( string $hostname)
static

Return IP address for given hostname, or null on failure.

Parameters
string$hostname
Return values
string|null

◆ is_domain_in_allowed_list()

static core\ip_utils::is_domain_in_allowed_list ( $domain,
$alloweddomains )
static

Checks the domain name against a list of allowed domains.

The list of allowed domains may use wildcards that match {

See also
is_domain_matching_pattern()}. Domains are compared in a case-insensitive manner
Parameters
string$domainDomain address
array$alloweddomainsAn array of allowed domains.
Return values
booleanTrue if the domain matches one of the entries in the allowed domains list.

◆ is_domain_matching_pattern()

static core\ip_utils::is_domain_matching_pattern ( $pattern)
static

Checks whether the input string is a valid wildcard domain matching pattern.

A domain matching pattern is essentially a domain name with a single, leading wildcard (*) label, and at least one other label. The wildcard label is considered to match at least one label at or above (to the left of) its position in the string, but will not match the trailing domain (everything to its right).

The string must be dot-separated, and the whole pattern must follow the domain name syntax rules defined in RFC1034/1035. Namely, the character type (ascii), total-length (253) and label-length (63) restrictions. This function only confirms syntactic correctness. It does not check for the existence of the domain/subdomains.

For example, the string '*.example.com' is a pattern deemed to match any direct subdomain of example.com (such as test.example.com), any higher level subdomains (e.g. another.test.example.com) but will not match the 'example.com' domain itself.

Parameters
string$patternthe string to check.
Return values
booltrue if the input string is a valid domain wildcard matching pattern, false otherwise.

◆ is_domain_name()

static core\ip_utils::is_domain_name ( $domainname)
static

Syntax checking for domain names, including fully qualified domain names.

This function does not verify the existence of the domain name. It only verifies syntactic correctness. This is based on RFC1034/1035 and does not provide support for validation of internationalised domain names (IDNs). All IDNs must be prior-converted to their ascii-compatible encoding before being passed to this function.

Parameters
string$domainnamethe input string to check.
Return values
booltrue if the string has valid syntax, false otherwise.

◆ is_ip_address()

static core\ip_utils::is_ip_address ( $address)
static

Syntax validation for IP addresses, supporting both IPv4 and Ipv6 formats.

Parameters
string$addressthe address to check.
Return values
booltrue if the address is a valid IPv4 of IPv6 address, false otherwise.

◆ is_ip_in_subnet_list()

static core\ip_utils::is_ip_in_subnet_list ( $ip,
$list,
$delim = "\n" )
static

Is an ip in a given list of subnets?

Parameters
string$ip- the IP to test against the list
string$list- the list of IP subnets
string$delima delimiter of the list
Return values
bool

◆ is_ipv4_address()

static core\ip_utils::is_ipv4_address ( $address)
static

Syntax validation for IPv4 addresses.

Parameters
string$addressthe address to check.
Return values
booltrue if the address is a valid IPv4 address, false otherwise.

◆ is_ipv4_range()

static core\ip_utils::is_ipv4_range ( $addressrange)
static

Syntax checking for IPv4 address ranges.

Supports CIDR notation and last-group ranges. Eg. 127.0.0.0/24 or 127.0.0.80-255

Parameters
string$addressrangethe address range to check.
Return values
booltrue if the string is a valid range representation, false otherwise.

◆ is_ipv6_address()

static core\ip_utils::is_ipv6_address ( $address)
static

Syntax validation for IPv6 addresses.

This function does not check whether the address is assigned, only its syntactical correctness.

Parameters
string$addressthe address to check.
Return values
booltrue if the address is a valid IPv6 address, false otherwise.

◆ is_ipv6_range()

static core\ip_utils::is_ipv6_range ( $addressrange)
static

Syntax validation for IPv6 address ranges.

Supports CIDR notation and last-group ranges. Eg. fe80\d98c/64 or fe80\d98c-ffee

Parameters
string$addressrangethe IPv6 address range to check.
Return values
booltrue if the string is a valid range representation, false otherwise.

The documentation for this class was generated from the following file: