🌈style: 调整目录组织，tcpdump源代码放入src目录

src/signature.h

@@ -0,0 +1,29 @@
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
+ * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ *
+ * Functions for signature and digest verification.
+ *
+ * Original code by Hannes Gredler (hannes@juniper.net)
+ */
+
+/* for netdissect_options */
+#include "netdissect.h"
+
+/* signature checking result codes */
+#define SIGNATURE_VALID		0
+#define SIGNATURE_INVALID	1
+#define CANT_ALLOCATE_COPY	2
+#define CANT_CHECK_SIGNATURE	3
+
+extern const struct tok signature_check_values[];
+extern int signature_verify(netdissect_options *, const u_char *, u_int,
+                            const u_char *, void (*)(void *), const void *);