79 lines
1.4 KiB
Go
79 lines
1.4 KiB
Go
package common
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import (
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C "github.com/Dreamacro/clash/constant"
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"net/netip"
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)
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type IPSuffix struct {
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*Base
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ipBytes []byte
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bits int
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payload string
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adapter string
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isSourceIP bool
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noResolveIP bool
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}
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func (is *IPSuffix) RuleType() C.RuleType {
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if is.isSourceIP {
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return C.SrcIPSuffix
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}
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return C.IPSuffix
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}
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func (is *IPSuffix) Match(metadata *C.Metadata) bool {
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ip := metadata.DstIP
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if is.isSourceIP {
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ip = metadata.SrcIP
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}
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mIPBytes := ip.AsSlice()
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if len(is.ipBytes) != len(mIPBytes) {
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return false
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}
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size := len(mIPBytes)
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bits := is.bits
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for i := bits / 8; i > 0; i-- {
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if is.ipBytes[size-i] != mIPBytes[size-i] {
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return false
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}
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}
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if (is.ipBytes[size-bits/8-1] << (8 - bits%8)) != (mIPBytes[size-bits/8-1] << (8 - bits%8)) {
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return false
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}
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return true
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}
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func (is *IPSuffix) Adapter() string {
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return is.adapter
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}
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func (is *IPSuffix) Payload() string {
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return is.payload
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}
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func (is *IPSuffix) ShouldResolveIP() bool {
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return !is.noResolveIP
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}
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func NewIPSuffix(payload, adapter string, isSrc, noResolveIP bool) (*IPSuffix, error) {
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ipnet, err := netip.ParsePrefix(payload)
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if err != nil {
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return nil, errPayload
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}
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return &IPSuffix{
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Base: &Base{},
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payload: payload,
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ipBytes: ipnet.Addr().AsSlice(),
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bits: ipnet.Bits(),
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adapter: adapter,
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isSourceIP: isSrc,
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noResolveIP: noResolveIP,
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}, nil
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}
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