github.com/metacubex/mihomo@v1.18.5/dns/policy.go (about)

     1  package dns
     2  
     3  import (
     4  	"github.com/metacubex/mihomo/component/trie"
     5  	C "github.com/metacubex/mihomo/constant"
     6  	"github.com/metacubex/mihomo/constant/provider"
     7  )
     8  
     9  type dnsPolicy interface {
    10  	Match(domain string) []dnsClient
    11  }
    12  
    13  type domainTriePolicy struct {
    14  	*trie.DomainTrie[[]dnsClient]
    15  }
    16  
    17  func (p domainTriePolicy) Match(domain string) []dnsClient {
    18  	record := p.DomainTrie.Search(domain)
    19  	if record != nil {
    20  		return record.Data()
    21  	}
    22  	return nil
    23  }
    24  
    25  type geositePolicy struct {
    26  	matcher    fallbackDomainFilter
    27  	inverse    bool
    28  	dnsClients []dnsClient
    29  }
    30  
    31  func (p geositePolicy) Match(domain string) []dnsClient {
    32  	matched := p.matcher.Match(domain)
    33  	if matched != p.inverse {
    34  		return p.dnsClients
    35  	}
    36  	return nil
    37  }
    38  
    39  type domainSetPolicy struct {
    40  	domainSetProvider provider.RuleProvider
    41  	dnsClients        []dnsClient
    42  }
    43  
    44  func (p domainSetPolicy) Match(domain string) []dnsClient {
    45  	metadata := &C.Metadata{Host: domain}
    46  	if ok := p.domainSetProvider.Match(metadata); ok {
    47  		return p.dnsClients
    48  	}
    49  	return nil
    50  }