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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 (
"github.com/seancfoley/ipaddress-go/ipaddr/addrstrparam"
"strings"
"github.com/seancfoley/ipaddress-go/ipaddr/addrerr"
)
type embeddedAddress struct {
isUNCIPv6Literal, isReverseDNS bool
addressStringError addrerr.AddressStringError
addressProvider ipAddressProvider
}
var (
noQualifier = &parsedHostIdentifierStringQualifier{}
)
type parsedHostCache struct {
normalizedLabels []string
host string
}
type parsedHost struct {
separatorIndices []int // can be nil
normalizedFlags []bool
labelsQualifier parsedHostIdentifierStringQualifier
embeddedAddress embeddedAddress
originalStr string
*parsedHostCache
params addrstrparam.HostNameParams
}
func (host *parsedHost) getQualifier() *parsedHostIdentifierStringQualifier {
return &host.labelsQualifier
}
func (host *parsedHost) isIPv6Address() bool {
return host.hasEmbeddedAddress() && host.getAddressProvider().isProvidingIPv6()
}
func (host *parsedHost) getPort() Port {
return host.labelsQualifier.getPort()
}
func (host *parsedHost) getService() string {
return host.labelsQualifier.getService()
}
func (host *parsedHost) getNetworkPrefixLen() PrefixLen {
return host.labelsQualifier.getNetworkPrefixLen()
}
func (host *parsedHost) getEquivalentPrefixLen() PrefixLen {
return host.labelsQualifier.getEquivalentPrefixLen()
}
func (host *parsedHost) getMask() *IPAddress {
return host.labelsQualifier.getMaskLower()
}
func (host *parsedHost) getAddressProvider() ipAddressProvider {
return host.embeddedAddress.addressProvider
}
func (host *parsedHost) hasEmbeddedAddress() bool {
return host.embeddedAddress.addressProvider != nil
}
func (host *parsedHost) isAddressString() bool {
return host.getAddressProvider() != nil
}
func (host *parsedHost) asAddress() (*IPAddress, addrerr.IncompatibleAddressError) {
if host.hasEmbeddedAddress() {
return host.getAddressProvider().getProviderAddress()
}
return nil, nil
}
func (host *parsedHost) mapString(addressProvider ipAddressProvider) string {
if addressProvider.isProvidingAllAddresses() {
return SegmentWildcardStr
//} else if addressProvider.isProvidingPrefixOnly() {
//return IPAddressNetwork.getPrefixString(addressProvider.getProviderNetworkPrefixLength())
} else if addressProvider.isProvidingEmpty() {
return ""
}
return host.originalStr
}
func (host *parsedHost) asGenericAddressString() *IPAddressString {
if host.hasEmbeddedAddress() {
addressProvider := host.getAddressProvider()
if addressProvider.isProvidingAllAddresses() {
return NewIPAddressStringParams(SegmentWildcardStr, addressProvider.getParameters())
} else if addressProvider.isProvidingEmpty() {
return NewIPAddressStringParams("", addressProvider.getParameters())
} else {
addr, err := addressProvider.getProviderAddress()
if err != nil {
return NewIPAddressStringParams(host.originalStr, addressProvider.getParameters())
}
return addr.ToAddressString()
}
}
return nil
}
func (host *parsedHost) getHost() string {
return host.buildHostString()
}
func (host *parsedHost) buildHostString() string {
if host.parsedHostCache == nil {
var hostStr string
if host.hasEmbeddedAddress() {
addressProvider := host.getAddressProvider()
addr, err := addressProvider.getProviderAddress()
if err == nil && addr != nil {
section := addr.GetSection()
//port was stripped out
//mask and prefix removed by toNormalizedWildcardString
//getSection() removes zone
hostStr = section.ToCanonicalWildcardString()
} else {
hostStr = host.mapString(addressProvider)
}
} else {
var label string
normalizedFlags := host.normalizedFlags
var hostStrBuilder strings.Builder
for i, lastSep := 0, -1; i < len(host.separatorIndices); i++ {
index := host.separatorIndices[i]
if len(normalizedFlags) > 0 && !normalizedFlags[i] {
var normalizedLabelBuilder strings.Builder
normalizedLabelBuilder.Grow((index - lastSep) - 1)
for j := lastSep + 1; j < index; j++ {
c := host.originalStr[j]
if c >= 'A' && c <= 'Z' {
c = c + ('a' - 'A')
}
normalizedLabelBuilder.WriteByte(c)
}
label = normalizedLabelBuilder.String()
} else {
label = host.originalStr[lastSep+1 : index]
}
if i > 0 {
hostStrBuilder.WriteByte(LabelSeparator)
}
hostStrBuilder.WriteString(label)
lastSep = index
}
hostStr = hostStrBuilder.String()
}
return hostStr
}
return host.parsedHostCache.host
}
func (host *parsedHost) buildNormalizedLabels() []string {
if host.parsedHostCache == nil {
var normalizedLabels []string
if host.hasEmbeddedAddress() {
addressProvider := host.getAddressProvider()
addr, err := addressProvider.getProviderAddress()
if err == nil && addr != nil {
section := addr.GetSection()
normalizedLabels = section.GetSegmentStrings()
} else {
hostStr := host.mapString(addressProvider)
if addressProvider.isProvidingEmpty() {
normalizedLabels = []string{}
} else {
normalizedLabels = []string{hostStr}
}
}
} else {
normalizedLabels = make([]string, len(host.separatorIndices))
normalizedFlags := host.normalizedFlags
for i, lastSep := 0, -1; i < len(normalizedLabels); i++ {
index := host.separatorIndices[i]
if len(normalizedFlags) > 0 && !normalizedFlags[i] {
var normalizedLabelBuilder strings.Builder
normalizedLabelBuilder.Grow((index - lastSep) - 1)
for j := lastSep + 1; j < index; j++ {
c := host.originalStr[j]
if c >= 'A' && c <= 'Z' {
c = c + ('a' - 'A')
}
normalizedLabelBuilder.WriteByte(c)
}
normalizedLabels[i] = normalizedLabelBuilder.String()
} else {
normalizedLabels[i] = host.originalStr[lastSep+1 : index]
}
lastSep = index
}
}
return normalizedLabels
}
return host.parsedHostCache.normalizedLabels
}
func (host *parsedHost) getNormalizedLabels() []string {
return host.buildNormalizedLabels()
}
func (host *parsedHost) isUNCIPv6Literal() bool {
return host.embeddedAddress.isUNCIPv6Literal
}
func (host *parsedHost) isReverseDNS() bool {
return host.embeddedAddress.isReverseDNS
}
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