Ipaddr

Network address manipulation library for Scala. Inspired by netaddr library for Python. Examples in this readme are taken from here.

Tutorial

• IpAddress
• IpNetwork
• IpRange
• IpSet
• Nmap style address

Contributing

Before making any contributions, please check the issues section to make sure your concern is not duplicate. If your issue is not already addressed, please create one. Describe the problem/bug/feature that you would like to be solved. If you are ready to contribute, read on...

1. Fork this repo!
2. Create a new branch with a name that hints about what is added/fixed in the branch.
3. Squash your commits. We like having single commit pull requests :)
4. Open a pull request and make sure your commit message references the issue number.

License

This project is licensed under the Apache License. Please see LICENSE file for more details.

Authors

• Pankaj Khatkar - initial work

IpAddress

Create IpAddress from a string notation or a Long value

val ip1: IpAddress = IpAddress("192.168.0.1")
val ip2: IpAddress = IpAddress(3232235521L) // also represents 192.168.0.1
val ip3: IpAddress = IpAddress("192.168.0.2")

Check the equality

ip1.equals(ip2) // true
ip1.equals(ip3) // false

More information about an IpAddress

ip3.width // 32
ip3.wordSize // 8
ip3.wordCount  // 4
ip3.maxWord  // 255

Numerical representation

val ip: IpAddress = IpAddress(169738753L) // 10.30.2.1
ip.hex // 0a1e0201
ip.words // WrappedArray(10, 30, 2, 1)
ip.bits("-") // 00001010-00011110-00000010-00000001
ip.version // 4

Sorting

val unsortedIpSeq = Seq(IpAddress("192.0.2.130"), IpAddress("10.0.0.1"), IpAddress("192.0.2.128"),
                        IpAddress("192.0.3.0"), IpAddress("192.0.2.0"))
unsortedIpSeq.sorted // List(10.0.0.1, 192.0.2.0, 192.0.2.128, 192.0.2.130, 192.0.3.0)

Categorization

• Private

IpAddress("192.168.0.1").isPrivate // true
IpAddress("8.8.8.8").isPrivate // false

• LinkLocal

IpAddress("169.254.0.0").isLinkLocal // true
IpAddress("192.168.0.1").isLinkLocal  // false

• Loopback

IpAddress("127.0.0.1").isLoopback // true
IpAddress("192.168.0.1").isLoopback  // false

• Multicast

IpAddress("239.192.0.1").isMulticast // true
IpAddress("192.168.0.1").isMulticast  // false

• Unicast

IpAddress("239.192.0.1").isUnicast // false
IpAddress("192.168.0.1").isUnicast  // true

• Reserved

IpAddress("192.0.0.1").isReserved // true
IpAddress("10.1.2.0").isReserved  // false

• Is Netmask

IpAddress("255.255.254.0").isNetmask // true
IpAddress("239.192.0.1").isNetmask  // false

• Is Hostmast

IpAddress("0.0.1.255").isHostmask // true
IpAddress("10.1.2.0").isHostmask  // false

Comparing IpAddress

IpAddress("192.0.2.1") == IpAddress("192.0.2.1") // true
IpAddress("192.0.2.1") < IpAddress("192.0.2.2") // true
IpAddress("192.0.2.2") > IpAddress("192.0.2.1") // true
IpAddress("192.0.2.1") != IpAddress("192.0.2.1") // false
IpAddress("192.0.2.1") >= IpAddress("192.0.2.1") // true
IpAddress("192.0.2.2") >= IpAddress("192.0.2.1") // true
IpAddress("192.0.2.1") <= IpAddress("192.0.2.1") // true
IpAddress("192.0.2.1") <= IpAddress("192.0.2.2") // true

IpNetwork

Create an IpNetwork from a CIDR string notation. All of the following calls represent the same network:

val n1 = IpNetwork("192.0.3.112/22")
val n2 = IpNetwork("192.0.3.112", 22)
val n3 = IpNetwork(IpAddress("192.0.3.112"), 22)
val n4 = IpNetwork(3221226352L, 22)

Useful details about a network:

n1.ip // 192.0.3.112
n1.broadcast // 192.0.3.255
n1.netmask // 255.255.252.0
n1.hostmask // 0.0.3.255
n1.size // 1024
n1.first // 3221225472
n1.last // 3221226495
n1.cidr // 192.0.0.0/22, true CIDR address which omits all host bits

val n5 = IpNetwork("192.0.2.1/32") // this creates a network with single host
val n6 = IpNetwork("192.0.2.1") // same as n5
n5.ip // 192.0.2.1
n5.broadcast // 192.0.2.1
n5.netmask // 255.255.255.255
n5.hostmask // 0.0.0.0
n5.size // 1
n5.first // 3221225985
n5.last // 3221225985

Checking if an IpAddress/IpNetwork/IpRange belongs to another IpNetwork:

n1.contains("192.0.3.136") // true
n1.contains(IpNetwork("192.0.3.112/24")) // true
n1.contains(IpRange("192.0.3.112", "192.0.3.115")) // true

Get a list of IpAddresses belonging to an IpNetwork:

IpNetwork("192.0.3.112/30").iter // Vector(192.0.3.112, 192.0.3.113, 192.0.3.114, 192.0.3.115)

Sorting

val unsortedNetworks = Seq(IpNetwork("192.0.2.128/28"), IpNetwork("192.0.3.0/24"),
                           IpNetwork("192.0.2.0/24"), IpNetwork("172.24/12"))
unsortedNetworks.sorted // List(172.24.0.0/12, 192.0.2.0/24, 192.0.2.128/28, 192.0.3.0/24)

Comparing IpNetworks

IpNetwork compares the subnets (or lower and upper boundaries) rather than their individual IP address values. That's why following example returns true.

IpNetwork("192.0.2.0/24") == IpNetwork("192.0.2.112/24") // true

You can exactly specify which portion of each IpNetwork you’d like to compare.

IpNetwork("192.0.2.0/24").ip == IpNetwork("192.0.2.112/24").ip // false
IpNetwork("192.0.2.0/24").ip < IpNetwork("192.0.2.112/24").ip // true
IpNetwork("192.0.2.0/24").cidr == IpNetwork("192.0.2.112/24").cidr // true
IpNetwork("192.0.2.0/24") == IpNetwork("192.0.3.0/24") // false
IpNetwork("192.0.2.0/24") != IpNetwork("192.0.3.0/24") // true
IpNetwork("192.0.2.0/24") < IpNetwork("192.0.3.0/24") // true

IpRange

Create an IpRange from dot-delimited IP addresses

val r1 = IpRange("10.1.2.3", "10.1.2.9")
r1.toString // 10.1.2.3-10.1.2.9

More information about an IpRange

r1.first // 167838211
r1.last // 167838217
r1.size // 7
r1.cidrs  // Vector(10.1.2.3/32, 10.1.2.4/30, 10.1.2.8/31)

Check if an IpAddress/IpNetwork/IpRange belongs to another IpRange

r1.contains(IpAddress("10.1.2.4")) // true
r1.contains("10.1.2.4") // true
r1.contains("10.1.2.12") // false
r1.contains(IpNetwork("10.1.2.0/31")) // false

IpSet

Create an IpSet form IpNetwork, IpRange or a sequence of IpNetwork elements

val s1 = IpSet(IpRange("10.1.2.0", "10.1.2.8"))
val s2 = IpSet(IpNetwork("10.1.2.0/28"))
val s3 = IpSet(Seq(IpNetwork("10.1.2.0"), IpNetwork("10.1.2.8")))
val emptySet = IpSet()
s1.head // 10.1.2.0/29
s1.ipRange // 10.1.2.0-10.1.2.8
s2.ipRange // 10.1.2.0-10.1.2.15
s1.isContiguous // true
s1.volume // 9

Adding and removing elements from IpSet

Add/remove an IpAddress, IpNetwork and IpRange from an IpSet.

s1 + IpAddress("10.1.2.10") // IpSet(10.1.2.0/29, 10.1.2.8/32, 10.1.2.10/32)
s1 + IpAddress("10.1.2.0") // IpSet(10.1.2.0/29, 10.1.2.8/32)
s1 - IpAddress("10.1.2.0") // IpSet(10.1.2.1/32, 10.1.2.2/31, 10.1.2.4/30, 10.1.2.8/32)
s1 - IpNetwork("10.1.2.2/31") // IpSet(10.1.2.0/31, 10.1.2.4/30, 10.1.2.8/32)
s1 - IpRange("10.1.2.0", "10.1.2.8") // IpSet()

Comparing IpSets

val largeSet = IpSet(IpRange("10.1.2.0", "10.1.2.8"))
val smallSet = IpSet(IpRange("10.1.2.0", "10.1.2.6"))
smallSet < largeSet // true
smallSet < smallSet // false
smallSet <= largeSet // true.  Equivalent to smallSet.subsetOf(largeSet)
smallSet > largeSet // false
smallSet >= largeSet // false. Equivalent to smallSet.supersetOf(largeSet)

IpSet membership

Check if an IpAddress or IpNetwork belongs to an IpSet.

val ipSet = IpSet(IpRange("10.1.2.0", "10.1.2.8"))
ipSet.contains(IpAddress("10.1.2.6")) // true
ipSet.contains(IpAddress("10.1.2.9")) // false
ipSet.contains(IpNetwork("10.1.2.4/30")) // true

Check if an IpSet belongs to another IpSet

val s1 = IpSet(Seq(IpNetwork("10.1.2.6"), IpNetwork("10.1.2.8")))
val s2 = IpSet(Seq(IpNetwork("10.1.2.8"), IpNetwork("10.1.2.10")))
val s3 = IpSet(IpNetwork("10.1.2.9"))
s1.isDisjoint(s2) // false
s1.isDisjoint(s3) // true. Because s3 has nothing in common with s1.

Set operations on IpSet

val s1 = IpSet(Seq(IpNetwork("10.1.2.6"), IpNetwork("10.1.2.8")))
val s2 = IpSet(Seq(IpNetwork("10.1.2.8"), IpNetwork("10.1.2.10")))
s1 & s2 // IpSet(10.1.2.8/32). Equivalent to s1.intersect(s2)
s1 | s2 // IpSet(10.1.2.6/32, 10.1.2.8/32, 10.1.2.10/32). Equivalent to s1.union(s2)
s1 ^ s2 // IpSet(10.1.2.6/32, 10.1.2.10/32). Equivalent to s1.symmetricDiff(s2)

Nmap style addresses

Ipaddr library provides some helper methods to operate on Nmap style address.

Nmap.validNmapRange("192.168.3-5,7.1") // true
Nmap.validNmapRange("10.2-3.4.5-8") // true
Nmap.validNmapRange("172.163.-.12") // true
Nmap.validNmapRange("10.1.2,1-3") // false
Nmap.validNmapRange("1.2.256.2") // false
Nmap.validNmapRange("17.12.12-a.3") // false

Generate an Iterator over Ipaddress contained in an Nmap address.

Nmap.iterNmapRange("192.168.3-5,7.1")

Above code returns an Iterator with IpAddresses 192.168.3.1, 192.168.4.1, 192.168.5.1, 192.168.7.1.