sing-box/transport/v2raygrpc/conn.go

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package v2raygrpc
import (
"net"
"os"
"time"
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"github.com/sagernet/sing-box/common/baderror"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/rw"
)
var _ net.Conn = (*GRPCConn)(nil)
type GRPCConn struct {
GunService
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cancel common.ContextCancelCauseFunc
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cache []byte
}
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func NewGRPCConn(service GunService, cancel common.ContextCancelCauseFunc) *GRPCConn {
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if client, isClient := service.(GunService_TunClient); isClient {
service = &clientConnWrapper{client}
}
return &GRPCConn{
GunService: service,
cancel: cancel,
}
}
func (c *GRPCConn) Read(b []byte) (n int, err error) {
if len(c.cache) > 0 {
n = copy(b, c.cache)
c.cache = c.cache[n:]
return
}
hunk, err := c.Recv()
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err = baderror.WrapGRPC(err)
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if err != nil {
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c.cancel(err)
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return
}
n = copy(b, hunk.Data)
if n < len(hunk.Data) {
c.cache = hunk.Data[n:]
}
return
}
func (c *GRPCConn) Write(b []byte) (n int, err error) {
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err = baderror.WrapGRPC(c.Send(&Hunk{Data: b}))
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if err != nil {
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c.cancel(err)
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return
}
return len(b), nil
}
func (c *GRPCConn) Close() error {
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c.cancel(net.ErrClosed)
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return nil
}
func (c *GRPCConn) LocalAddr() net.Addr {
return nil
}
func (c *GRPCConn) RemoteAddr() net.Addr {
return nil
}
func (c *GRPCConn) SetDeadline(t time.Time) error {
return os.ErrInvalid
}
func (c *GRPCConn) SetReadDeadline(t time.Time) error {
return os.ErrInvalid
}
func (c *GRPCConn) SetWriteDeadline(t time.Time) error {
return os.ErrInvalid
}
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func (c *GRPCConn) NeedAdditionalReadDeadline() bool {
return true
}
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func (c *GRPCConn) Upstream() any {
return c.GunService
}
var _ rw.WriteCloser = (*clientConnWrapper)(nil)
type clientConnWrapper struct {
GunService_TunClient
}
func (c *clientConnWrapper) CloseWrite() error {
return c.CloseSend()
}