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parsedaddr.go
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parsedaddr.go
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//
// Copyright 2020-2022 Sean C Foley
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package ipaddr
import (
"strconv"
"sync"
"unsafe"
"github.com/seancfoley/ipaddress-go/ipaddr/addrerr"
"github.com/seancfoley/ipaddress-go/ipaddr/addrstrparam"
)
// How address sections and addresses and ranges can be created here:
// section (with no error) -> address -> sequential range
// non-nil hostSection -> hostAddress
// nil hostSection -> section (with no error) -> address -> hostAddress
// lower/upper boundary -> sequential range
// lower boundary -> mask (ie address used as mask)
type translatedResult struct {
sections *sectionResult
rng *SequentialRange[*IPAddress]
mask *IPAddress
//series IPAddressDivisionSeries // TODO LATER division grouping creation
}
type boundaryResult struct {
lowerSection, upperSection *IPAddressSection
}
func (res *boundaryResult) createRange() *SequentialRange[*IPAddress] {
//we need to add zone in order to reuse the lower and upper
lowerSection := res.lowerSection
creator := lowerSection.getAddrType().getIPNetwork().getIPAddressCreator()
rangeLower := creator.createAddressInternalFromSection(lowerSection, NoZone, nil)
var rangeUpper *IPAddress
if res.upperSection == nil {
rangeUpper = rangeLower
} else {
rangeUpper = creator.createAddressInternalFromSection(res.upperSection, NoZone, nil)
}
result := rangeLower.SpanWithRange(rangeUpper)
return result
}
func (res *boundaryResult) createMask() *IPAddress {
lowerSection := res.lowerSection
creator := lowerSection.getAddrType().getIPNetwork().getIPAddressCreator()
return creator.createAddressInternalFromSection(res.lowerSection, NoZone, nil)
}
type sectionResult struct {
section, hostSection *IPAddressSection
address, hostAddress *IPAddress
joinHostError, joinAddressError /* inet_aton, single seg */, mixedError, maskError addrerr.IncompatibleAddressError
}
func (res *sectionResult) withoutAddressException() bool {
return res.joinAddressError == nil && res.mixedError == nil && res.maskError == nil
}
type parsedIPAddress struct {
ipAddressParseData
ipAddrProvider // provides a few methods like isInvalid
options addrstrparam.IPAddressStringParams
originator HostIdentifierString
vals translatedResult
skipCntains *bool
maskers, mixedMaskers []Masker
creationLock sync.Mutex
}
func (parseData *parsedIPAddress) values() *translatedResult {
return &parseData.vals
}
func (parseData *parsedIPAddress) providerCompare(other ipAddressProvider) (int, addrerr.IncompatibleAddressError) {
return providerCompare(parseData, other)
}
func (parseData *parsedIPAddress) providerEquals(other ipAddressProvider) (bool, addrerr.IncompatibleAddressError) {
return providerEquals(parseData, other)
}
func (parseData *parsedIPAddress) isProvidingIPAddress() bool {
return true
}
func (parseData *parsedIPAddress) getType() ipType {
return fromVersion(parseData.getProviderIPVersion())
}
func (parseData *parsedIPAddress) getParameters() addrstrparam.IPAddressStringParams {
return parseData.options
}
// Note: the following are needed because we have two anonymous fields and there are name clashes
// Instead of defaulting to the default methods in ipAddressProvider, we need to defer to our parsed data for these methods
//
func (parseData *parsedIPAddress) isProvidingMixedIPv6() bool {
return parseData.ipAddressParseData.isProvidingMixedIPv6()
}
func (parseData *parsedIPAddress) isProvidingIPv6() bool {
return parseData.ipAddressParseData.isProvidingIPv6()
}
func (parseData *parsedIPAddress) isProvidingIPv4() bool {
return parseData.ipAddressParseData.isProvidingIPv4()
}
func (parseData *parsedIPAddress) isProvidingBase85IPv6() bool {
return parseData.ipAddressParseData.isProvidingBase85IPv6()
}
func (parseData *parsedIPAddress) getProviderIPVersion() IPVersion {
return parseData.ipAddressParseData.getProviderIPVersion()
}
func (parseData *parsedIPAddress) getIPAddressParseData() *ipAddressParseData {
return &parseData.ipAddressParseData
}
// creation methods start here
func (parseData *parsedIPAddress) createSections(doSections, doRangeBoundaries, withUpper bool) (sections sectionResult, boundaries boundaryResult) {
version := parseData.getProviderIPVersion()
if version.IsIPv4() {
return parseData.createIPv4Sections(doSections, doRangeBoundaries, withUpper)
} else if version.IsIPv6() {
return parseData.createIPv6Sections(doSections, doRangeBoundaries, withUpper)
}
return
}
func (parseData *parsedIPAddress) getProviderSeqRange() *SequentialRange[*IPAddress] {
val := parseData.values()
result := (*SequentialRange[*IPAddress])(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(&val.rng))))
if result == nil {
parseData.creationLock.Lock()
result = val.rng
if result == nil {
sections := val.sections
if sections == nil {
_, boundaries := parseData.createSections(false, true, true)
// creates lower, upper, then range from the two
result = boundaries.createRange()
} else {
if sections.withoutAddressException() {
result = sections.address.ToSequentialRange()
} else {
_, boundaries := parseData.createSections(false, true, true)
result = boundaries.createRange()
}
}
dataLoc := (*unsafe.Pointer)(unsafe.Pointer(&val.rng))
atomicStorePointer(dataLoc, unsafe.Pointer(result))
}
parseData.creationLock.Unlock()
}
return result
}
// this is for parsed addresses which are masks in and of themselves
// with masks, only the lower value matters
func (parseData *parsedIPAddress) getValForMask() *IPAddress {
val := parseData.values()
mask := (*IPAddress)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(&val.mask))))
if mask == nil {
parseData.creationLock.Lock()
mask = val.mask
if mask == nil {
_, boundaries := parseData.createSections(false, true, false)
mask = boundaries.createMask()
dataLoc := (*unsafe.Pointer)(unsafe.Pointer(&val.mask))
atomicStorePointer(dataLoc, unsafe.Pointer(mask))
}
parseData.creationLock.Unlock()
}
return mask
}
func (parseData *parsedIPAddress) getCachedAddresses(forHostAddr bool) *sectionResult {
val := parseData.values()
sections := (*sectionResult)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(&val.sections))))
if sections == nil {
parseData.creationLock.Lock()
sections = val.sections
if sections == nil {
sects, _ := parseData.createSections(true, false, false)
sections = §s
dataLoc := (*unsafe.Pointer)(unsafe.Pointer(&val.sections))
atomicStorePointer(dataLoc, unsafe.Pointer(sections))
}
parseData.creationLock.Unlock()
}
if sections.withoutAddressException() {
var addr *IPAddress
if forHostAddr {
addr = (*IPAddress)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(§ions.hostAddress))))
} else {
addr = (*IPAddress)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(§ions.address))))
}
if addr == nil {
parseData.creationLock.Lock()
if forHostAddr {
addr = sections.hostAddress
} else {
addr = sections.address
}
if addr == nil {
var section *IPAddressSection
var originator HostIdentifierString
if forHostAddr {
section = sections.hostSection
if section == nil {
section = sections.section
}
} else {
section = sections.section
originator = parseData.originator
}
creator := section.getAddrType().getIPNetwork().getIPAddressCreator()
addr = creator.createAddressInternalFromSection(section, parseData.getQualifier().getZone(), originator)
var dataLoc *unsafe.Pointer
if forHostAddr {
dataLoc = (*unsafe.Pointer)(unsafe.Pointer(§ions.hostAddress))
} else {
// if range created first, stick the lower and upper into the address cache,
// but only if the address no prefix, because the range never has prefix lengths
if rng := val.rng; rng != nil && !addr.IsPrefixed() {
cache := addr.cache
if cache != nil {
cache.addrsCache = &addrsCache{
lower: rng.lower.ToAddressBase(),
upper: rng.upper.ToAddressBase(),
}
}
}
dataLoc = (*unsafe.Pointer)(unsafe.Pointer(§ions.address))
}
atomicStorePointer(dataLoc, unsafe.Pointer(addr))
}
parseData.creationLock.Unlock()
}
}
return sections
}
// this is for parsed addresses which have associated masks
func (parseData *parsedIPAddress) getProviderMask() *IPAddress {
return parseData.getQualifier().getMaskLower()
}
func (parseData *parsedIPAddress) getProviderHostAddress() (*IPAddress, addrerr.IncompatibleAddressError) {
addrs := parseData.getCachedAddresses(true)
if addrs.mixedError != nil {
return nil, addrs.mixedError
} else if addrs.joinHostError != nil {
return nil, addrs.joinHostError
}
return addrs.hostAddress, nil
}
func (parseData *parsedIPAddress) getProviderAddress() (*IPAddress, addrerr.IncompatibleAddressError) {
addrs := parseData.getCachedAddresses(false)
if addrs.mixedError != nil {
return nil, addrs.mixedError
} else if addrs.maskError != nil {
return nil, addrs.maskError
} else if addrs.joinAddressError != nil {
return nil, addrs.joinAddressError
}
return addrs.address, nil
}
func (parseData *parsedIPAddress) getVersionedAddress(version IPVersion) (*IPAddress, addrerr.IncompatibleAddressError) {
thisVersion := parseData.getProviderIPVersion()
if version != thisVersion {
return nil, nil
}
return parseData.getProviderAddress()
}
func (parseData *parsedIPAddress) getProviderNetworkPrefixLen() PrefixLen {
return parseData.getQualifier().getEquivalentPrefixLen()
}
// TODO LATER getDivisionGrouping
//func (parseData *parsedIPAddress) groupingIsSequential() bool {
// try {
// return getDivisionGrouping().isSequential();
// } catch(IncompatibleAddressException e) {
// // division groupings avoid all IncompatibleAddressException caused by regrouping the values into segments of different size
// // that takes care of two of the sources of IncompatibleAddressException: joining mixed segs, and expanding inet_aton ipv4 or single-segment ipv6 into the standard number of ipv4 or ipv6 segments
//
// // Those remaining are the IncompatibleAddressException caused by masks, which are the result of individual divisions becoming non-sequential
// // So in such cases, you know we are not sequential. So we return false.
// // the usual caveat is that this cannot happen with standard network or host masks
// return false;
// }
// }
//
//func (parseData *parsedIPAddress) IsSequential() bool {
// TranslatedResult<?,?> val = values;
// if(val != null) {
// // check address first
// if(!val.withoutSections()) {
// // address already there, use it if we can
// if(val.withoutAddressException()) {
// return val.getAddress().isSequential();
// }
// return groupingIsSequential();
// }
// if(!val.withoutGrouping()) {
// return groupingIsSequential();
// }
// }
// // neither address nor grouping is there, create the address
// val = getCachedAddresses(false);
// if(val.withoutAddressException()) {
// return val.getAddress().isSequential();
// }
// return groupingIsSequential();
// }
// skips contains checking for addresses already parsed -
// so this is not a case of unusual string formatting, because this is not for comparing strings,
// but more a case of whether the parsing data structures are easy to use or not
func (parseData *parsedIPAddress) skipContains() bool {
segmentCount := parseData.getAddressParseData().getSegmentCount()
// first we must excluded cases where the segments line up differently than standard, although we do not exclude ipv6 compressed
if parseData.isProvidingIPv4() {
if segmentCount != IPv4SegmentCount { // accounts for is_inet_aton_joined, singleSegment and wildcard segments
return true
}
} else {
if parseData.isProvidingMixedIPv6() || (segmentCount != IPv6SegmentCount && !parseData.isCompressed()) { // accounts for single segment and wildcard segments
return true
}
}
// exclude non-standard masks which will modify segment values from their parsed values
mask := parseData.getProviderMask()
if mask != nil && mask.GetBlockMaskPrefixLen(true) == nil { // handles non-standard masks
return true
}
return false
}
//we do not call this method with parse data from inet_aton or single segment strings, so the cast to int is fine.
//this is only for addresses with standard segment counts, although we do allow compressed.
func (parseData *parsedIPAddress) isPrefixSubnet(networkPrefixLength BitCount) bool {
var bytesPerSegment int
var max SegInt
var bitsPerSegment BitCount
if parseData.isProvidingIPv4() {
bytesPerSegment = IPv4BytesPerSegment
bitsPerSegment = IPv4BitsPerSegment
max = IPv4MaxValuePerSegment
} else {
bytesPerSegment = IPv6BytesPerSegment
bitsPerSegment = IPv6BitsPerSegment
max = IPv6MaxValuePerSegment
}
addressParseData := parseData.getAddressParseData()
segmentCount := addressParseData.getSegmentCount()
if parseData.isCompressed() {
compressedCount := IPv6SegmentCount - segmentCount
compressedIndex := addressParseData.getConsecutiveSeparatorSegmentIndex()
return isPrefixSubnet(
func(segmentIndex int) SegInt {
if segmentIndex >= compressedIndex {
if segmentIndex-compressedIndex < compressedCount {
return 0
}
segmentIndex -= compressedCount
}
return SegInt(parseData.getValue(segmentIndex, keyLower))
},
func(segmentIndex int) SegInt {
if segmentIndex >= compressedIndex {
if segmentIndex-compressedIndex < compressedCount {
return 0
}
segmentIndex -= compressedCount
}
return SegInt(parseData.getValue(segmentIndex, keyUpper))
},
segmentCount+compressedCount,
bytesPerSegment,
bitsPerSegment,
max,
networkPrefixLength,
zerosOrFullRange)
}
return isPrefixSubnet(
func(segmentIndex int) SegInt {
return SegInt(parseData.getValue(segmentIndex, keyLower))
},
func(segmentIndex int) SegInt {
return SegInt(parseData.getValue(segmentIndex, keyUpper))
},
segmentCount,
bytesPerSegment,
bitsPerSegment,
max,
networkPrefixLength,
zerosOrFullRange)
}
func (parseData *parsedIPAddress) containmentCheck(other ipAddressProvider, networkOnly, equals, checkZone bool) (res boolSetting) {
if otherParsed, ok := other.(*parsedIPAddress); ok {
sect := (*sectionResult)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(&parseData.vals.sections))))
otherSect := (*sectionResult)(atomicLoadPointer((*unsafe.Pointer)(unsafe.Pointer(&otherParsed.vals.sections))))
if sect == nil || otherSect == nil {
// one or the other value not yet created, so take the shortcut that provides an answer most (but not all) of the time
// An answer is provided for all normalized, conventional or canonical addresses
res = parseData.containsProv(otherParsed, networkOnly, equals)
if checkZone && res.isSet && res.val {
res.val = parseData.getQualifier().getZone() == otherParsed.getQualifier().getZone()
}
} // else we defer to the values-based containment check (in the caller), which is best since it is ready to go
}
return
}
func (parseData *parsedIPAddress) containsProvider(other ipAddressProvider) (res boolSetting) {
return parseData.containmentCheck(other, false, false, true)
}
func (parseData *parsedIPAddress) parsedEquals(other ipAddressProvider) (res boolSetting) {
return parseData.containmentCheck(other, false, true, true)
}
func (parseData *parsedIPAddress) prefixContainsProvider(other ipAddressProvider) boolSetting {
return parseData.containmentCheck(other, true, false, false)
}
func (parseData *parsedIPAddress) prefixEqualsProvider(other ipAddressProvider) boolSetting {
return parseData.containmentCheck(other, true, true, false)
}
//not used for invalid, or cases where parseData.isEmpty or parseData.isAll
func (parseData *parsedIPAddress) containsProv(other *parsedIPAddress, networkOnly, equals bool) (res boolSetting) {
pd := parseData.getAddressParseData()
otherParseData := other.getAddressParseData()
segmentData := pd.getSegmentData() //grab this field for thread safety, other threads can make it disappear
otherSegmentData := otherParseData.getSegmentData() //grab this field for thread safety, other threads can make it disappear
if segmentData == nil || otherSegmentData == nil {
return
} else if parseData.skipContains() || other.skipContains() { // this excludes mixed addresses, amongst others
return
}
ipVersion := parseData.getProviderIPVersion()
if ipVersion != other.getProviderIPVersion() {
return boolSetting{true, false}
}
segmentCount := pd.getSegmentCount()
otherSegmentCount := otherParseData.getSegmentCount()
var max SegInt
var compressedAlready, otherCompressedAlready bool
var expectedSegCount, bytesPerSegment int
var bitsPerSegment BitCount
if parseData.isProvidingIPv4() {
max = IPv4MaxValuePerSegment
expectedSegCount = IPv4SegmentCount
bitsPerSegment = IPv4BitsPerSegment
bytesPerSegment = IPv4BytesPerSegment
compressedAlready = true
otherCompressedAlready = true
} else {
max = IPv6MaxValuePerSegment
expectedSegCount = IPv6SegmentCount
bitsPerSegment = IPv6BitsPerSegment
bytesPerSegment = IPv6BytesPerSegment
compressedAlready = expectedSegCount == segmentCount
otherCompressedAlready = expectedSegCount == otherSegmentCount
}
pref := parseData.getProviderNetworkPrefixLen()
otherPref := other.getProviderNetworkPrefixLen()
var networkSegIndex, hostSegIndex, endIndex, otherHostAllSegIndex, hostAllSegIndex int
endIndex = segmentCount
// determine what indexes to use for network, host, and prefix block adjustments (hostAllSegIndex and otherHostAllSegIndex)
var adjustedOtherPref PrefixLen
if pref == nil {
networkOnly = false
hostAllSegIndex = expectedSegCount
otherHostAllSegIndex = expectedSegCount
hostSegIndex = expectedSegCount
networkSegIndex = hostSegIndex - 1
} else {
prefLen := pref.bitCount()
if networkOnly {
hostSegIndex = getHostSegmentIndex(prefLen, bytesPerSegment, bitsPerSegment)
hostAllSegIndex = hostSegIndex
otherHostAllSegIndex = hostSegIndex
networkSegIndex = getNetworkSegmentIndex(prefLen, bytesPerSegment, bitsPerSegment)
// we treat the other as if it were a prefix block of the same prefix length
// this allows us to compare entire segments for prefixEquals, ignoring the host values
adjustedOtherPref = pref
} else {
otherHostAllSegIndex = expectedSegCount
hostSegIndex = getHostSegmentIndex(prefLen, bytesPerSegment, bitsPerSegment)
networkSegIndex = getNetworkSegmentIndex(prefLen, bytesPerSegment, bitsPerSegment)
if parseData.isPrefixSubnet(prefLen) {
hostAllSegIndex = hostSegIndex
if !equals {
// no need to look at host for containment when a prefix subnet
networkOnly = true
}
} else {
hostAllSegIndex = expectedSegCount
}
}
}
// Now determine if the other is a prefix block subnet, and if so, adjust otherHostAllSegIndex
if otherPref != nil {
otherPrefLen := otherPref.bitCount()
if adjustedOtherPref == nil || otherPrefLen < adjustedOtherPref.bitCount() {
otherHostIndex := getHostSegmentIndex(otherPrefLen, bytesPerSegment, bitsPerSegment)
if otherHostIndex < otherHostAllSegIndex &&
other.isPrefixSubnet(otherPrefLen) {
otherHostAllSegIndex = otherHostIndex
}
} else {
otherPref = adjustedOtherPref
}
} else {
otherPref = adjustedOtherPref
}
i, j, normalizedCount := 0, 0, 0
var compressedCount, otherCompressedCount int
for i < endIndex || compressedCount > 0 {
if networkOnly && normalizedCount > networkSegIndex {
break
}
var lower, upper SegInt
if compressedCount <= 0 {
lower = SegInt(parseData.getValue(i, keyLower))
upper = SegInt(parseData.getValue(i, keyUpper))
}
if normalizedCount >= hostAllSegIndex { // we've reached the prefixed segment
segPrefLength := getSegmentPrefixLength(bitsPerSegment, pref, normalizedCount)
segPref := segPrefLength.bitCount()
networkMask := ^SegInt(0) << uint(bitsPerSegment-segPref)
hostMask := ^networkMask
lower &= networkMask
upper |= hostMask
}
var otherLower, otherUpper SegInt
if normalizedCount > otherHostAllSegIndex {
otherLower = 0
otherUpper = max
} else {
if otherCompressedCount <= 0 {
otherLower = SegInt(otherParseData.getValue(j, keyLower))
otherUpper = SegInt(otherParseData.getValue(j, keyUpper))
}
if normalizedCount == otherHostAllSegIndex { // we've reached the prefixed segment
segPrefLength := getSegmentPrefixLength(bitsPerSegment, otherPref, normalizedCount)
segPref := segPrefLength.bitCount()
networkMask := ^SegInt(0) << uint(bitsPerSegment-segPref)
hostMask := ^networkMask
otherLower &= networkMask
otherUpper |= hostMask
}
}
if equals {
if lower != otherLower || upper != otherUpper {
return boolSetting{true, false}
}
} else {
if lower > otherLower || upper < otherUpper {
return boolSetting{true, false}
}
}
if !compressedAlready {
if compressedCount > 0 {
compressedCount--
if compressedCount == 0 {
compressedAlready = true
}
} else if parseData.segmentIsCompressed(i) {
i++
compressedCount = expectedSegCount - segmentCount
} else {
i++
}
} else {
i++
}
if !otherCompressedAlready {
if otherCompressedCount > 0 {
otherCompressedCount--
if otherCompressedCount == 0 {
otherCompressedAlready = true
}
} else if other.segmentIsCompressed(j) {
j++
otherCompressedCount = expectedSegCount - otherSegmentCount
} else {
j++
}
} else {
j++
}
normalizedCount++
}
return boolSetting{true, true}
}
func allocateSegments(
segments,
originalSegments []*AddressDivision,
segmentCount,
originalCount int) []*AddressDivision {
if segments == nil {
segments = createSegmentArray(segmentCount)
if originalCount > 0 {
copy(segments, originalSegments[:originalCount])
}
}
return segments
}
func (parseData *parsedIPAddress) createIPv4Sections(doSections, doRangeBoundaries, withUpper bool) (sections sectionResult, boundaries boundaryResult) {
qualifier := parseData.getQualifier()
prefLen := getPrefixLength(qualifier)
isMultiple := false
isHostMultiple := false
var segIsMult bool
mask := parseData.getProviderMask()
if mask != nil && mask.GetBlockMaskPrefixLen(true) != nil {
mask = nil //we don't do any masking if the mask is a subnet mask, instead we just map it to the corresponding prefix length
}
hasMask := mask != nil
addrParseData := parseData.getAddressParseData()
segmentCount := addrParseData.getSegmentCount()
if hasMask && parseData.maskers == nil {
parseData.maskers = make([]Masker, segmentCount)
}
creator := ipv4Type.getIPNetwork().getIPAddressCreator()
missingCount := IPv4SegmentCount - segmentCount
var hostSegments, segments, lowerSegments, upperSegments []*AddressDivision
if doSections {
segments = createSegmentArray(IPv4SegmentCount)
} else if doRangeBoundaries {
lowerSegments = createSegmentArray(IPv4SegmentCount)
} else {
return
}
expandedSegments := missingCount <= 0
expandedStart, expandedEnd := -1, -1
addressString := parseData.str
maskedIsDifferent := false
for i, normalizedSegmentIndex := 0, 0; i < segmentCount; i++ {
lower := addrParseData.getValue(i, keyLower)
upper := addrParseData.getValue(i, keyUpper)
if !expandedSegments {
//check for any missing segments that we should account for here
isLastSegment := i == segmentCount-1
isWildcard := addrParseData.isWildcard(i)
expandedSegments = isLastSegment
if !expandedSegments {
// if we are inet_aton, we must wait for last segment
// otherwise, we check if we are wildcard and no other wildcard further down
expandedSegments = !parseData.is_inet_aton_joined() && isWildcard
if expandedSegments {
for j := i + 1; j < segmentCount; j++ {
if addrParseData.isWildcard(j) { //another wildcard further down
expandedSegments = false
break
}
}
}
}
if expandedSegments {
if isWildcard {
upper = 0xffffffff >> uint((3-missingCount)<<3)
} else {
expandedStart = i
expandedEnd = i + missingCount
}
bits := BitCount(missingCount+1) << ipv4BitsToSegmentBitshift // BitCount(missingCount+1) * IPv4BitsPerSegment
var maskedLower, maskedUpper uint64
if hasMask {
var divMask uint64
for k := 0; k <= missingCount; k++ {
divMask = (divMask << uint(IPv4BitsPerSegment)) | uint64(mask.GetSegment(normalizedSegmentIndex+k).GetSegmentValue())
}
masker := parseData.maskers[i]
if masker == nil {
maxValue := ^(^uint64(0) << uint(bits))
masker = MaskRange(lower, upper, divMask, maxValue)
parseData.maskers[i] = masker
}
if !masker.IsSequential() && sections.maskError == nil {
sections.maskError = &incompatibleAddressError{
addressError: addressError{
str: maskString(lower, upper, divMask),
key: "ipaddress.error.maskMismatch",
},
}
}
maskedLower = masker.GetMaskedLower(lower, divMask)
maskedUpper = masker.GetMaskedUpper(upper, divMask)
maskedIsDifferent = maskedIsDifferent || maskedLower != lower || maskedUpper != upper
} else {
maskedLower = lower
maskedUpper = upper
}
shift := bits
count := missingCount
for count >= 0 { //add the missing segments
shift -= IPv4BitsPerSegment
currentPrefix := getSegmentPrefixLength(IPv4BitsPerSegment, prefLen, normalizedSegmentIndex)
//currentPrefix := getQualifierSegmentPrefixLength(normalizedSegmentIndex, , qualifier)
hostSegLower := SegInt((lower >> uint(shift)) & IPv4MaxValuePerSegment)
var hostSegUpper SegInt
if lower == upper {
hostSegUpper = hostSegLower
} else {
hostSegUpper = SegInt((upper >> uint(shift)) & IPv4MaxValuePerSegment)
}
var maskedSegLower, maskedSegUpper SegInt
if hasMask {
maskedSegLower = SegInt((maskedLower >> uint(shift)) & IPv4MaxValuePerSegment)
if maskedLower == maskedUpper {
maskedSegUpper = maskedSegLower
} else {
maskedSegUpper = SegInt((maskedUpper >> uint(shift)) & IPv4MaxValuePerSegment)
}
} else {
maskedSegLower = hostSegLower
maskedSegUpper = hostSegUpper
}
if doSections {
if maskedIsDifferent || currentPrefix != nil {
hostSegments = allocateSegments(hostSegments, segments, IPv4SegmentCount, normalizedSegmentIndex)
hostSegments[normalizedSegmentIndex], segIsMult = parseData.createSegment(
addressString,
IPv4,
hostSegLower,
hostSegUpper,
false,
i,
nil,
creator)
isHostMultiple = isHostMultiple || segIsMult
}
segments[normalizedSegmentIndex], segIsMult = parseData.createSegment(
addressString,
IPv4,
maskedSegLower,
maskedSegUpper,
false,
i,
currentPrefix,
creator)
isMultiple = isMultiple || segIsMult
}
if doRangeBoundaries {
isRange := maskedSegLower != maskedSegUpper
if !doSections || isRange {
if doSections {
lowerSegments = allocateSegments(lowerSegments, segments, IPv4SegmentCount, normalizedSegmentIndex)
} // else segments already allocated
lowerSegments[normalizedSegmentIndex], _ = parseData.createSegment(
addressString,
IPv4,
maskedSegLower,
maskedSegLower,
false,
i,
currentPrefix,
creator)
} else if lowerSegments != nil {
lowerSegments[normalizedSegmentIndex] = segments[normalizedSegmentIndex]
}
if withUpper {
if isRange {
upperSegments = allocateSegments(upperSegments, lowerSegments, IPv4SegmentCount, normalizedSegmentIndex)
upperSegments[normalizedSegmentIndex], _ = parseData.createSegment(
addressString,
IPv4,
maskedSegUpper,
maskedSegUpper,
false,
i,
currentPrefix,
creator)
} else if upperSegments != nil {
upperSegments[normalizedSegmentIndex] = lowerSegments[normalizedSegmentIndex]
}
}
}
normalizedSegmentIndex++
count--
}
addrParseData.setBitLength(i, bits)
continue
} //end handle inet_aton joined segments
}
hostLower, hostUpper := lower, upper
var masker Masker
unmasked := true
if hasMask {
masker = parseData.maskers[i]
maskInt := uint64(mask.GetSegment(normalizedSegmentIndex).GetSegmentValue())
if masker == nil {
masker = MaskRange(lower, upper, maskInt, uint64(creator.getMaxValuePerSegment()))
parseData.maskers[i] = masker
}
if !masker.IsSequential() && sections.maskError == nil {
sections.maskError = &incompatibleAddressError{
addressError: addressError{
str: maskString(lower, upper, maskInt),
key: "ipaddress.error.maskMismatch",
},
}
}
lower = masker.GetMaskedLower(lower, maskInt)
upper = masker.GetMaskedUpper(upper, maskInt)
unmasked = hostLower == lower && hostUpper == upper
maskedIsDifferent = maskedIsDifferent || !unmasked
}
segmentPrefixLength := getSegmentPrefixLength(IPv4BitsPerSegment, prefLen, normalizedSegmentIndex)
if doSections {
if maskedIsDifferent || segmentPrefixLength != nil {
hostSegments = allocateSegments(hostSegments, segments, IPv4SegmentCount, normalizedSegmentIndex)
hostSegments[normalizedSegmentIndex], segIsMult = parseData.createSegment(
addressString,
IPv4,
SegInt(hostLower),
SegInt(hostUpper),
true,
i,
nil,
creator)
isHostMultiple = isHostMultiple || segIsMult
}
segments[normalizedSegmentIndex], segIsMult = parseData.createSegment(
addressString,
IPv4,
SegInt(lower),
SegInt(upper),
unmasked,
i,
segmentPrefixLength,
creator)
isMultiple = isMultiple || segIsMult
}
if doRangeBoundaries {
isRange := lower != upper
if !doSections || isRange {
if doSections {
lowerSegments = allocateSegments(lowerSegments, segments, IPv4SegmentCount, normalizedSegmentIndex)
} // else segments already allocated
lowerSegments[normalizedSegmentIndex], _ = parseData.createSegment(
addressString,
IPv4,
SegInt(lower),
SegInt(lower),
false,
i,
segmentPrefixLength,
creator)
} else if lowerSegments != nil {
lowerSegments[normalizedSegmentIndex] = segments[normalizedSegmentIndex]
}
if withUpper {
if isRange {
upperSegments = allocateSegments(upperSegments, lowerSegments, IPv4SegmentCount, normalizedSegmentIndex)
upperSegments[normalizedSegmentIndex], _ = parseData.createSegment(
addressString,
IPv4,
SegInt(upper),
SegInt(upper),
false,
i,
segmentPrefixLength,
creator)
} else if upperSegments != nil {
upperSegments[normalizedSegmentIndex] = lowerSegments[normalizedSegmentIndex]
}
}
}
normalizedSegmentIndex++
addrParseData.setBitLength(i, IPv4BitsPerSegment)
}
prefLength := getPrefixLength(qualifier)
var result, hostResult *IPAddressSection
if doSections {
result = creator.createPrefixedSectionInternal(segments, isMultiple, prefLength)
sections.section = result
if hostSegments != nil {
hostResult = creator.createSectionInternal(hostSegments, isHostMultiple).ToIP()
sections.hostSection = hostResult
if checkExpandedValues(hostResult, expandedStart, expandedEnd) {
sections.joinHostError = &incompatibleAddressError{
addressError{
str: addressString,
key: "ipaddress.error.invalid.joined.ranges",
},
}
}
}
if checkExpandedValues(result, expandedStart, expandedEnd) {
sections.joinAddressError = &incompatibleAddressError{addressError{str: addressString, key: "ipaddress.error.invalid.joined.ranges"}}
if hostResult == nil {
sections.joinHostError = sections.joinAddressError
}
}
}
if doRangeBoundaries {
// if we have a prefix subnet, it is possible our lower and upper boundaries exceed what appears in the parsed address
prefixLength := getPrefixLength(qualifier)
isPrefixSub := false
if prefixLength != nil {
var lowerSegs, upperSegs []*AddressDivision
if doSections {
upperSegs = segments
lowerSegs = upperSegs
} else {
lowerSegs = lowerSegments
if upperSegments == nil {
upperSegs = lowerSegments
} else {
upperSegs = upperSegments
}
}
isPrefixSub = isPrefixSubnet(
func(index int) SegInt { return lowerSegs[index].ToSegmentBase().GetSegmentValue() },
func(index int) SegInt { return upperSegs[index].ToSegmentBase().GetUpperSegmentValue() },
len(lowerSegs),
IPv4BytesPerSegment,
IPv4BitsPerSegment,
IPv4MaxValuePerSegment,
prefixLength.bitCount(),
zerosOnly)
if isPrefixSub {
if lowerSegments == nil {
//allocate lower segments from address segments
lowerSegments = allocateSegments(lowerSegments, segments, IPv4SegmentCount, IPv4SegmentCount)
}
if upperSegments == nil {
//allocate upper segments from lower segments
upperSegments = allocateSegments(upperSegments, lowerSegments, IPv4SegmentCount, IPv4SegmentCount)
}
}
}
if lowerSegments != nil {
boundaries.lowerSection = creator.createPrefixedSectionInternalSingle(lowerSegments, false, prefLength)
}
if upperSegments != nil {
section := creator.createPrefixedSectionInternal(upperSegments, false, prefLength)
if isPrefixSub {
section = section.ToPrefixBlock()
}
boundaries.upperSection = section.GetUpper()
}
}
return
}
func (parseData *parsedIPAddress) createIPv6Sections(doSections, doRangeBoundaries, withUpper bool) (sections sectionResult, boundaries boundaryResult) {
qualifier := parseData.getQualifier()
prefLen := getPrefixLength(qualifier)
mask := parseData.getProviderMask()
if mask != nil && mask.GetBlockMaskPrefixLen(true) != nil {
mask = nil //we don't do any masking if the mask is a subnet mask, instead we just map it to the corresponding prefix length
}
hasMask := mask != nil
isMultiple := false