lib.network: ipv6 parser from string
Add a library function to parse and validate an IPv6 address from a string. It can parse the first two versions of an IPv6 address according to https://datatracker.ietf.org/doc/html/rfc4291#section-2.2. The third form "x:x:x:x:x:x.d.d.d.d" is not yet implemented. Optionally parser can accept prefix length (128 is default). Add shell script network.sh to test IPv6 parser functionality.
This commit is contained in:
woojiq
117
lib/tests/network.sh
Executable file
117
lib/tests/network.sh
Executable file
@@ -0,0 +1,117 @@
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#!/usr/bin/env bash
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# Tests lib/network.nix
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# Run:
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# [nixpkgs]$ lib/tests/network.sh
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# or:
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# [nixpkgs]$ nix-build lib/tests/release.nix
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set -euo pipefail
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shopt -s inherit_errexit
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if [[ -n "${TEST_LIB:-}" ]]; then
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NIX_PATH=nixpkgs="$(dirname "$TEST_LIB")"
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else
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NIX_PATH=nixpkgs="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.."; pwd)"
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fi
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export NIX_PATH
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die() {
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echo >&2 "test case failed: " "$@"
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exit 1
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}
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tmp="$(mktemp -d)"
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clean_up() {
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rm -rf "$tmp"
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}
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trap clean_up EXIT SIGINT SIGTERM
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work="$tmp/work"
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mkdir "$work"
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cd "$work"
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prefixExpression='
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let
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lib = import <nixpkgs/lib>;
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internal = import <nixpkgs/lib/network/internal.nix> {
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inherit lib;
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};
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in
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with lib;
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with lib.network;
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'
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expectSuccess() {
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local expr=$1
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local expectedResult=$2
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if ! result=$(nix-instantiate --eval --strict --json --show-trace \
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--expr "$prefixExpression ($expr)"); then
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die "$expr failed to evaluate, but it was expected to succeed"
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fi
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if [[ ! "$result" == "$expectedResult" ]]; then
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die "$expr == $result, but $expectedResult was expected"
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fi
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}
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expectSuccessRegex() {
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local expr=$1
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local expectedResultRegex=$2
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if ! result=$(nix-instantiate --eval --strict --json --show-trace \
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--expr "$prefixExpression ($expr)"); then
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die "$expr failed to evaluate, but it was expected to succeed"
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fi
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if [[ ! "$result" =~ $expectedResultRegex ]]; then
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die "$expr == $result, but $expectedResultRegex was expected"
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fi
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}
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expectFailure() {
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local expr=$1
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local expectedErrorRegex=$2
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if result=$(nix-instantiate --eval --strict --json --show-trace 2>"$work/stderr" \
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--expr "$prefixExpression ($expr)"); then
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die "$expr evaluated successfully to $result, but it was expected to fail"
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fi
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if [[ ! "$(<"$work/stderr")" =~ $expectedErrorRegex ]]; then
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die "Error was $(<"$work/stderr"), but $expectedErrorRegex was expected"
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fi
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}
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# Internal functions
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expectSuccess '(internal._ipv6.split "0:0:0:0:0:0:0:0").address' '[0,0,0,0,0,0,0,0]'
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expectSuccess '(internal._ipv6.split "000a:000b:000c:000d:000e:000f:ffff:aaaa").address' '[10,11,12,13,14,15,65535,43690]'
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expectSuccess '(internal._ipv6.split "::").address' '[0,0,0,0,0,0,0,0]'
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expectSuccess '(internal._ipv6.split "::0000").address' '[0,0,0,0,0,0,0,0]'
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expectSuccess '(internal._ipv6.split "::1").address' '[0,0,0,0,0,0,0,1]'
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expectSuccess '(internal._ipv6.split "::ffff").address' '[0,0,0,0,0,0,0,65535]'
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expectSuccess '(internal._ipv6.split "::000f").address' '[0,0,0,0,0,0,0,15]'
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expectSuccess '(internal._ipv6.split "::1:1:1:1:1:1:1").address' '[0,1,1,1,1,1,1,1]'
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expectSuccess '(internal._ipv6.split "1::").address' '[1,0,0,0,0,0,0,0]'
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expectSuccess '(internal._ipv6.split "1:1:1:1:1:1:1::").address' '[1,1,1,1,1,1,1,0]'
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expectSuccess '(internal._ipv6.split "1:1:1:1::1:1:1").address' '[1,1,1,1,0,1,1,1]'
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expectSuccess '(internal._ipv6.split "1::1").address' '[1,0,0,0,0,0,0,1]'
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expectFailure 'internal._ipv6.split "0:0:0:0:0:0:0:-1"' "contains malformed characters for IPv6 address"
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expectFailure 'internal._ipv6.split "::0:"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split ":0::"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "0::0:"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "0:0:"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "0:0:0:0:0:0:0:0:0"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "0:0:0:0:0:0:0:0:"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "::0:0:0:0:0:0:0:0"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "0::0:0:0:0:0:0:0"' "is not a valid IPv6 address"
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expectFailure 'internal._ipv6.split "::10000"' "0x10000 is not a valid u16 integer"
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expectSuccess '(internal._ipv6.split "::").prefixLength' '128'
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expectSuccess '(internal._ipv6.split "::/1").prefixLength' '1'
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expectSuccess '(internal._ipv6.split "::/128").prefixLength' '128'
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expectFailure '(internal._ipv6.split "::/0").prefixLength' "IPv6 subnet should be in range \[1;128\], got 0"
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expectFailure '(internal._ipv6.split "::/129").prefixLength' "IPv6 subnet should be in range \[1;128\], got 129"
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expectFailure '(internal._ipv6.split "/::/").prefixLength' "is not a valid IPv6 address in CIDR notation"
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# Library API
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expectSuccess 'lib.network.ipv6.fromString "2001:DB8::ffff/64"' '{"address":"2001:db8:0:0:0:0:0:ffff","prefixLength":64}'
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expectSuccess 'lib.network.ipv6.fromString "1234:5678:90ab:cdef:fedc:ba09:8765:4321/44"' '{"address":"1234:5678:90ab:cdef:fedc:ba09:8765:4321","prefixLength":44}'
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echo >&2 tests ok
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@@ -65,6 +65,9 @@ pkgs.runCommand "nixpkgs-lib-tests-nix-${nix.version}" {
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echo "Running lib/tests/sources.sh"
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TEST_LIB=$PWD/lib bash lib/tests/sources.sh
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echo "Running lib/tests/network.sh"
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TEST_LIB=$PWD/lib bash lib/tests/network.sh
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echo "Running lib/fileset/tests.sh"
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TEST_LIB=$PWD/lib bash lib/fileset/tests.sh
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