( Cidr(..),
cidr_from_string,
cidr_tests,
- combine_all
+ combine_all,
+ contains,
+ contains_proper,
+ max_octet1,
+ max_octet2,
+ max_octet3,
+ max_octet4,
+ min_octet1,
+ min_octet2,
+ min_octet3,
+ min_octet4,
+ prop_all_cidrs_contain_themselves,
+ prop_contains_proper_intransitive
) where
import Data.List (nubBy)
import Test.HUnit
+import Test.QuickCheck
+import qualified Bit as B
import IPv4Address
import ListUtils
import Maskable
show cidr = (show (ipv4address cidr)) ++ "/" ++ (show (maskbits cidr))
+instance Arbitrary Cidr where
+ arbitrary = do
+ ipv4 <- arbitrary :: Gen IPv4Address
+ mask <- arbitrary :: Gen Maskbits
+ return (Cidr ipv4 mask)
+
+ coarbitrary _ = variant 0
+
+
-- Two CIDR ranges are equivalent if they have the same network bits
-- and the masks are the same.
equivalent :: Cidr -> Cidr -> Bool
equivalent Cidr.None _ = False
equivalent _ Cidr.None = False
equivalent (Cidr addr1 mbits1) (Cidr addr2 mbits2) =
- (mbits1 == mbits2) && ((apply_mask addr1 mbits1) == (apply_mask addr2 mbits2))
+ (mbits1 == mbits2) && ((apply_mask addr1 mbits1 B.Zero) == (apply_mask addr2 mbits2 B.Zero))
-- Returns the mask portion of a CIDR address. That is, everything
-- after the trailing slash.
maskbits_from_cidr_string :: String -> Maskbits
-maskbits_from_cidr_string s =
- maskbits_from_string ((splitWith (`elem` "/") s) !! 1)
+maskbits_from_cidr_string s
+ | length partlist == 2 = maskbits_from_string (partlist !! 1)
+ | otherwise = Maskbits.None
+ where
+ partlist = (splitWith (`elem` "/") s)
-- Takes an IP address String in CIDR notation, and returns a list of
+min_host :: Cidr -> IPv4Address
+min_host Cidr.None = IPv4Address.None
+min_host (Cidr IPv4Address.None _) = IPv4Address.None
+min_host (Cidr _ Maskbits.None) = IPv4Address.None
+min_host (Cidr addr mask) = apply_mask addr mask B.Zero
+
+
+max_host :: Cidr -> IPv4Address
+max_host Cidr.None = IPv4Address.None
+max_host (Cidr IPv4Address.None _) = IPv4Address.None
+max_host (Cidr _ Maskbits.None) = IPv4Address.None
+max_host (Cidr addr mask) = apply_mask addr mask B.One
+
+
+min_octet1 :: Cidr -> Octet
+min_octet1 cidr = octet1 (min_host cidr)
+
+min_octet2 :: Cidr -> Octet
+min_octet2 cidr = octet2 (min_host cidr)
+
+min_octet3 :: Cidr -> Octet
+min_octet3 cidr = octet3 (min_host cidr)
+
+min_octet4 :: Cidr -> Octet
+min_octet4 cidr = octet4 (min_host cidr)
+
+max_octet1 :: Cidr -> Octet
+max_octet1 cidr = octet1 (max_host cidr)
+
+max_octet2 :: Cidr -> Octet
+max_octet2 cidr = octet2 (max_host cidr)
+
+max_octet3 :: Cidr -> Octet
+max_octet3 cidr = octet3 (max_host cidr)
+
+max_octet4 :: Cidr -> Octet
+max_octet4 cidr = octet4 (max_host cidr)
+
+
+
-- Return true if the first argument (a CIDR range) contains the
-- second (another CIDR range). There are a lot of ways we can be fed
-- junk here. For lack of a better alternative, just return False when
| mbits1 > mbits2 = False
| otherwise = addr1masked == addr2masked
where
- addr1masked = apply_mask addr1 mbits1
- addr2masked = apply_mask addr2 mbits1
+ addr1masked = apply_mask addr1 mbits1 B.Zero
+ addr2masked = apply_mask addr2 mbits1 B.Zero
contains_proper :: Cidr -> Cidr -> Bool
contains_proper cidr1 cidr2 =
- (cidr1 `contains` cidr2) && (not (cidr1 == cidr2))
+ (cidr1 `contains` cidr2) && (not (cidr2 `contains` cidr1))
-- A CIDR range is redundant (with respect to the given list) if
-- HUnit Tests
+test_min_host1 :: Test
+test_min_host1 =
+ TestCase $ assertEqual "The minimum host in 10.0.0.0/24 is 10.0.0.0" expected actual
+ where
+ actual = show $ min_host (cidr_from_string "10.0.0.0/24")
+ expected = "10.0.0.0"
+
+
+test_max_host1 :: Test
+test_max_host1 =
+ TestCase $ assertEqual "The maximum host in 10.0.0.0/24 is 10.0.0.255" expected actual
+ where
+ actual = show $ min_host (cidr_from_string "10.0.0.0/24")
+ expected = "10.0.0.255"
+
+
test_equality1 :: Test
test_equality1 =
TestCase $ assertEqual "10.1.1.0/23 equals itself" True (cidr1 == cidr1)
cidr2 = cidr_from_string "10.1.2.0/24"
+test_combine_contained1 :: Test
+test_combine_contained1 =
+ TestCase $ assertEqual "10.0.0.0/8, 10.1.0.0/16, and 10.1.1.0/24 combine to 10.0.0.0/8" expected_cidrs (combine_contained test_cidrs)
+ where
+ cidr1 = cidr_from_string "10.0.0.0/8"
+ cidr2 = cidr_from_string "10.1.0.0/16"
+ cidr3 = cidr_from_string "10.1.1.0/24"
+ expected_cidrs = [cidr1]
+ test_cidrs = [cidr1, cidr2, cidr3]
+
+
+test_combine_contained2 :: Test
+test_combine_contained2 =
+ TestCase $ assertEqual "192.168.3.0/23 does not contain 192.168.1.0/24" [cidr1, cidr2] (combine_contained [cidr1, cidr2])
+ where
+ cidr1 = cidr_from_string "192.168.3.0/23"
+ cidr2 = cidr_from_string "192.168.1.0/24"
+
+
+test_combine_all1 :: Test
+test_combine_all1 =
+ TestCase $ assertEqual "10.0.0.0/24 is adjacent to 10.0.1.0/24 and 10.0.3.0/23 contains 10.0.2.0/24" expected_cidrs (combine_all test_cidrs)
+ where
+ cidr1 = cidr_from_string "10.0.0.0/24"
+ cidr2 = cidr_from_string "10.0.1.0/24"
+ cidr3 = cidr_from_string "10.0.2.0/24"
+ cidr4 = cidr_from_string "10.0.3.0/23"
+ cidr5 = cidr_from_string "10.0.0.0/23"
+ expected_cidrs = [cidr4, cidr5]
+ test_cidrs = [cidr1, cidr2, cidr3, cidr4]
+
+
+test_combine_all2 :: Test
+test_combine_all2 =
+ TestCase $ assertEqual "127.0.0.1/32 combines with itself recursively" expected_cidrs (combine_all test_cidrs)
+ where
+ cidr1 = cidr_from_string "127.0.0.1/32"
+ expected_cidrs = [cidr1]
+ test_cidrs = [cidr1, cidr1, cidr1, cidr1, cidr1]
+
+
cidr_tests :: [Test]
-cidr_tests = [ test_equality1,
+cidr_tests = [ test_min_host1,
+ test_max_host1,
+ test_equality1,
test_contains1,
test_contains2,
test_contains_proper1,
test_adjacent1,
test_adjacent2,
test_adjacent3,
- test_adjacent4
+ test_adjacent4,
+ test_combine_contained1,
+ test_combine_contained2,
+ test_combine_all1,
+ test_combine_all2
]
+
+
+-- QuickCheck Tests
+prop_all_cidrs_contain_themselves :: Cidr -> Bool
+prop_all_cidrs_contain_themselves cidr1 = cidr1 `contains` cidr1
+
+
+-- If cidr1 properly contains cidr2, then by definition cidr2
+-- does not properly contain cidr1.
+prop_contains_proper_intransitive :: Cidr -> Cidr -> Property
+prop_contains_proper_intransitive cidr1 cidr2 =
+ (cidr1 `contains_proper` cidr2) ==>
+ (not (cidr2 `contains_proper` cidr1))