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package mux
import (
"sync"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/protocol"
)
type SessionManager struct {
sync.RWMutex
sessions map[uint16]*Session
count uint16
closed bool
}
func NewSessionManager() *SessionManager {
return &SessionManager{
count: 0,
sessions: make(map[uint16]*Session, 16),
}
}
func (m *SessionManager) Closed() bool {
m.RLock()
defer m.RUnlock()
return m.closed
}
func (m *SessionManager) Size() int {
m.RLock()
defer m.RUnlock()
return len(m.sessions)
}
func (m *SessionManager) Count() int {
m.RLock()
defer m.RUnlock()
return int(m.count)
}
func (m *SessionManager) Allocate() *Session {
m.Lock()
defer m.Unlock()
if m.closed {
return nil
}
m.count++
s := &Session{
ID: m.count,
parent: m,
}
m.sessions[s.ID] = s
return s
}
func (m *SessionManager) Add(s *Session) {
m.Lock()
defer m.Unlock()
if m.closed {
return
}
m.count++
m.sessions[s.ID] = s
}
func (m *SessionManager) Remove(id uint16) {
m.Lock()
defer m.Unlock()
if m.closed {
return
}
delete(m.sessions, id)
if len(m.sessions) == 0 {
m.sessions = make(map[uint16]*Session, 16)
}
}
func (m *SessionManager) Get(id uint16) (*Session, bool) {
m.RLock()
defer m.RUnlock()
if m.closed {
return nil, false
}
s, found := m.sessions[id]
return s, found
}
func (m *SessionManager) CloseIfNoSession() bool {
m.Lock()
defer m.Unlock()
if m.closed {
return true
}
if len(m.sessions) != 0 {
return false
}
m.closed = true
return true
}
func (m *SessionManager) Close() error {
m.Lock()
defer m.Unlock()
if m.closed {
return nil
}
m.closed = true
for _, s := range m.sessions {
common.Close(s.input)
common.Close(s.output)
}
m.sessions = nil
return nil
}
// Session represents a client connection in a Mux connection.
type Session struct {
input buf.Reader
output buf.Writer
parent *SessionManager
ID uint16
transferType protocol.TransferType
}
// Close closes all resources associated with this session.
func (s *Session) Close() error {
common.Close(s.output)
common.Close(s.input)
s.parent.Remove(s.ID)
return nil
}
// NewReader creates a buf.Reader based on the transfer type of this Session.
func (s *Session) NewReader(reader *buf.BufferedReader) buf.Reader {
if s.transferType == protocol.TransferTypeStream {
return NewStreamReader(reader)
}
return NewPacketReader(reader)
}
|
