TSG-8364: 重构代码，只解QUIC链接的第一个数据包

src/quic_deprotection_utils.h

@@ -0,0 +1,43 @@
+/**
+ * utils.h
+ *
+ * Created on 2020-11-27
+ * @author: qyc
+ *
+ * @explain: 
+ */
+#ifndef UTILS_H
+#define UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "glib.h"
+
+/*
+ * Decodes a variable-length integer used in QUIC protocol
+ * See https://tools.ietf.org/html/draft-ietf-quic-transport-08#section-8.1
+ */
+#define ENC_VARINT_QUIC	0x00000004
+
+/* Explicit and implicit nonce length (RFC 5116 - Section 3.2.1) */
+#define TLS13_AEAD_NONCE_LENGTH	12
+
+
+/* XXX Should we use GByteArray instead? */
+typedef struct _StringInfo {
+	// Backing storage which may be larger than data_len
+	guchar *data;
+	// Length of the meaningful part of data
+	guint data_len;
+} StringInfo;
+
+gboolean tls13_hkdf_expand_label(int md, const StringInfo *secret, const char *label_prefix, const char *label, guint16 out_len, guchar **out);
+guint tvb_get_varint(const char *tvb, guint offset, guint maxlen, guint64 *value, const guint encoding);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //UTILS_H