TSG-4030 Security Event Logs 中的 SSL.Intercept State 为 Passthrough 时，并未说明引起 Passthrough 的原因

(当命中 tcp passthrough 时，将 ssl_intercept_status 设置为 passthrough)

common/src/tfe_cmsg.cpp

@@ -62,6 +62,17 @@ int tfe_cmsg_set(struct tfe_cmsg * cmsg, enum tfe_cmsg_tlv_type type, const unsi
 	}
 	struct tfe_cmsg_tlv *tlv = cmsg->tlvs[type];
 	uint16_t length = sizeof(struct tfe_cmsg_tlv) + size;
+
+	// If the current tlv has been set, the previous value will be overwritten
+	if (NULL != tlv)
+	{
+		cmsg->nr_tlvs--;
+		cmsg->size -= tlv->length;
+		cmsg->tlvs[type] = NULL;
+		free(tlv);
+		tlv = NULL;
+	}
+	
 	if(tlv == NULL)
 	{
 		tlv = (struct tfe_cmsg_tlv*)ALLOC(char, length);