81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package outbound
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import (
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"bytes"
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"crypto/tls"
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xtls "github.com/xtls/go"
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"net"
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"strconv"
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"sync"
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"time"
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"github.com/Dreamacro/clash/component/resolver"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/transport/socks5"
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)
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var (
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globalClientSessionCache tls.ClientSessionCache
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globalClientXSessionCache xtls.ClientSessionCache
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once sync.Once
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)
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func tcpKeepAlive(c net.Conn) {
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if tcp, ok := c.(*net.TCPConn); ok {
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tcp.SetKeepAlive(true)
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tcp.SetKeepAlivePeriod(30 * time.Second)
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}
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}
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func getClientSessionCache() tls.ClientSessionCache {
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once.Do(func() {
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globalClientSessionCache = tls.NewLRUClientSessionCache(128)
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})
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return globalClientSessionCache
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}
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func getClientXSessionCache() xtls.ClientSessionCache {
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once.Do(func() {
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globalClientXSessionCache = xtls.NewLRUClientSessionCache(128)
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})
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return globalClientXSessionCache
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}
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func serializesSocksAddr(metadata *C.Metadata) []byte {
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var buf [][]byte
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aType := uint8(metadata.AddrType)
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p, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
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port := []byte{uint8(p >> 8), uint8(p & 0xff)}
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switch metadata.AddrType {
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case socks5.AtypDomainName:
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len := uint8(len(metadata.Host))
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host := []byte(metadata.Host)
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buf = [][]byte{{aType, len}, host, port}
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case socks5.AtypIPv4:
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host := metadata.DstIP.To4()
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buf = [][]byte{{aType}, host, port}
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case socks5.AtypIPv6:
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host := metadata.DstIP.To16()
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buf = [][]byte{{aType}, host, port}
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}
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return bytes.Join(buf, nil)
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}
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func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
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host, port, err := net.SplitHostPort(address)
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if err != nil {
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return nil, err
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}
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ip, err := resolver.ResolveIP(host)
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if err != nil {
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return nil, err
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}
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return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
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}
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func safeConnClose(c net.Conn, err error) {
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if err != nil {
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c.Close()
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}
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}
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