Update libpcap to 1.9.0 (no patches applied yet)

libpcap/pcap-common.h

@@ -1,3 +1,25 @@
+/*
+ * Copyright (c) 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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, (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, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * 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.
+ *
+ * pcap-common.h - common code for pcap and pcapng files
+ */
 
 /*
  * We use the "receiver-makes-right" approach to byte order,
@@ -13,9 +35,13 @@
  * machine (if the file was written in little-end order).
  */
 #define	SWAPLONG(y) \
-((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
+    (((((u_int)(y))&0xff)<<24) | \
+     ((((u_int)(y))&0xff00)<<8) | \
+     ((((u_int)(y))&0xff0000)>>8) | \
+     ((((u_int)(y))>>24)&0xff))
 #define	SWAPSHORT(y) \
-	( (((y)&0xff)<<8) | ((u_short)((y)&0xff00)>>8) )
+     ((u_short)(((((u_int)(y))&0xff)<<8) | \
+                ((((u_int)(y))&0xff00)>>8)))
 
 extern int dlt_to_linktype(int dlt);
 
@@ -23,3 +49,5 @@ extern int linktype_to_dlt(int linktype);
 
 extern void swap_pseudo_headers(int linktype, struct pcap_pkthdr *hdr,
     u_char *data);
+
+extern u_int max_snaplen_for_dlt(int dlt);