添加 github.com/pion/dtls 代码

dtls-2.0.9/pkg/protocol/extension/errors.go

@@ -0,0 +1,14 @@
+package extension
+
+import (
+	"errors"
+
+	"github.com/pion/dtls/v2/pkg/protocol"
+)
+
+var (
+	errBufferTooSmall       = &protocol.TemporaryError{Err: errors.New("buffer is too small")}                         //nolint:goerr113
+	errInvalidExtensionType = &protocol.FatalError{Err: errors.New("invalid extension type")}                          //nolint:goerr113
+	errInvalidSNIFormat     = &protocol.FatalError{Err: errors.New("invalid server name format")}                      //nolint:goerr113
+	errLengthMismatch       = &protocol.InternalError{Err: errors.New("data length and declared length do not match")} //nolint:goerr113
+)