github.com/inazumav/sing-box@v0.0.0-20230926072359-ab51429a14f1/transport/fakeip/memory.go (about)

     1  package fakeip
     2  
     3  import (
     4  	"net/netip"
     5  	"sync"
     6  
     7  	"github.com/inazumav/sing-box/adapter"
     8  	"github.com/sagernet/sing/common/logger"
     9  )
    10  
    11  var _ adapter.FakeIPStorage = (*MemoryStorage)(nil)
    12  
    13  type MemoryStorage struct {
    14  	addressAccess sync.RWMutex
    15  	domainAccess  sync.RWMutex
    16  	addressCache  map[netip.Addr]string
    17  	domainCache4  map[string]netip.Addr
    18  	domainCache6  map[string]netip.Addr
    19  }
    20  
    21  func NewMemoryStorage() *MemoryStorage {
    22  	return &MemoryStorage{
    23  		addressCache: make(map[netip.Addr]string),
    24  		domainCache4: make(map[string]netip.Addr),
    25  		domainCache6: make(map[string]netip.Addr),
    26  	}
    27  }
    28  
    29  func (s *MemoryStorage) FakeIPMetadata() *adapter.FakeIPMetadata {
    30  	return nil
    31  }
    32  
    33  func (s *MemoryStorage) FakeIPSaveMetadata(metadata *adapter.FakeIPMetadata) error {
    34  	return nil
    35  }
    36  
    37  func (s *MemoryStorage) FakeIPSaveMetadataAsync(metadata *adapter.FakeIPMetadata) {
    38  }
    39  
    40  func (s *MemoryStorage) FakeIPStore(address netip.Addr, domain string) error {
    41  	s.addressAccess.Lock()
    42  	s.domainAccess.Lock()
    43  	s.addressCache[address] = domain
    44  	if address.Is4() {
    45  		s.domainCache4[domain] = address
    46  	} else {
    47  		s.domainCache6[domain] = address
    48  	}
    49  	s.domainAccess.Unlock()
    50  	s.addressAccess.Unlock()
    51  	return nil
    52  }
    53  
    54  func (s *MemoryStorage) FakeIPStoreAsync(address netip.Addr, domain string, logger logger.Logger) {
    55  	_ = s.FakeIPStore(address, domain)
    56  }
    57  
    58  func (s *MemoryStorage) FakeIPLoad(address netip.Addr) (string, bool) {
    59  	s.addressAccess.RLock()
    60  	defer s.addressAccess.RUnlock()
    61  	domain, loaded := s.addressCache[address]
    62  	return domain, loaded
    63  }
    64  
    65  func (s *MemoryStorage) FakeIPLoadDomain(domain string, isIPv6 bool) (netip.Addr, bool) {
    66  	s.domainAccess.RLock()
    67  	defer s.domainAccess.RUnlock()
    68  	if !isIPv6 {
    69  		address, loaded := s.domainCache4[domain]
    70  		return address, loaded
    71  	} else {
    72  		address, loaded := s.domainCache6[domain]
    73  		return address, loaded
    74  	}
    75  }
    76  
    77  func (s *MemoryStorage) FakeIPReset() error {
    78  	s.addressCache = make(map[netip.Addr]string)
    79  	s.domainCache4 = make(map[string]netip.Addr)
    80  	s.domainCache6 = make(map[string]netip.Addr)
    81  	return nil
    82  }