Code Examples

These are the Go code examples. You can also compare to the Java code examples.

Creating, Parsing, Extracting Address/Subnet Info

• Parse IP Address or Subnet String
• Parse IP Address String with Prefix Length as Subnet or IP Address
• Check if String is an IP Address or Host Name
• Parse Socket Address
• Convert to/from []byte, int, or big.Int
• Get Prefix Length, Network Mask, Network Address, Version, Subnet Size and Segments from CIDR Address or Subnet
• Apply Masks and Prefix Lengths
• Check if Multicast
• Control Parsing of IP Addresses with Fewer Segments than Standard

Subnet or Range Containment, Matching, and Comparing

• Check if Subnet Contains Address or Subnet
• Check if Address or Subnet Falls within Arbitrary Address Range
• Select CIDR Prefix Block Subnets Containing an Address
• Select Addresses Contained by a CIDR Prefix Block Subnet
• Get Prefix Blocks Common to List of Addresses
• Longest Prefix Match
• Select Addresses and Subnets within Arbitrary Address Range
• Select Address Ranges Containing Arbitrary Address or Subnet
• Select CIDR Prefix Block Subnets Intersecting with Arbitrary Block
• Select Address Ranges Intersecting with Arbitrary Address Range
• Look up Associated IP Address Data by Containing Subnet or Matching Address
• Sort Addresses, Blocks and Ranges Collectively using Various Orderings
• Use Addresses as Keys for Go built-in maps

Subnetting and Other Subnet Operations

• Iterate through Subnet
• Iterate through Subnet Boundaries
• From Start and End Address, Get a Minimal List of CIDR Blocks Spanning the Range
• From Start and End Address, Get a Single CIDR Block Covering Both
• Merge a List of Addresses or Subnets into a Minimal List of CIDR Blocks
• Break a CIDR Prefix Block into Direct Component Blocks
• Iteratively Break a CIDR Prefix Block into Component Blocks
• Derive New Subnet from Existing CIDR Subnet
• Remove Address or Subnet from Subnet
• Variable Length Subnetting
• Automatic Subnetting
• From Start and End Address, Get a Minimal List of Spanning Subnets, each with Segments either Single-Valued or Full-Range

Converting to/from Other Formats

• Convert to/from Binary String from/to IP Address
• Convert to/from IPv6 Address from/to MAC Address
• Convert to/from IPv6 Address from/to Ascii Base 85 Encoding
• Convert to/from IPv4 Address from/to IPv6 Address
• Write/Read Addresses to/from Byte Buffer in Native Byte Order