Merge remote-tracking branch 'goog/tcpdump'
* goog/tcpdump: (3066 commits)
Remove old version. Getting ready for new tcpdump 4.5
Support -Q for setting the capture direction.
Clean up the TLV processing loop.
With -A and -AA, don't send CRs to the standard output.
Use the new libpcap <pcap/nflog.h> for NFLOG definitions and declarations.
Do our own isascii(), isprint(), isgraph(), and toascii().
Fix a compiler warning.
Don't use the __attribute__((packed)) on most platforms.
The interval in an AODV HELLO extension is not aligned on a 4-byte boundary.
As with memcpy, so with memcmp.
More UNALIGNED_MEM{CPY,CMP} on IP addresses.
Another case where UNALIGNED_MEMCPY() is probably necessary.
No need for casting back and forth.
Only do the unaligned_mem{cpy,cmp} hack if necessary.
No need to declare unaligned_mem{cpy,cmp} in netdissect.h *and* interface.h.
More possibly-unaligned memcpy()s and assignments - use unaligned_memcpy().
Check for compiling for IPv6; don't check whether we can create an IPv6 socket.
Use unaligned_memcmp() to compare with IPv{4,6} addresses in a packet.
Use EXTRACT_nBITS even when just testing against zero.
Fix some more unaligned accesses.
...
Change-Id: I9e98707d30c989b9e32dcd5af798bd0746ab4434
diff --git a/print-vxlan.c b/print-vxlan.c
new file mode 100644
index 0000000..8034463
--- /dev/null
+++ b/print-vxlan.c
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ *
+ * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+#include "udp.h"
+
+/*
+ * VXLAN header, draft-mahalingam-dutt-dcops-vxlan-03
+ *
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |R|R|R|R|I|R|R|R| Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | VXLAN Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+void
+vxlan_print(const u_char *bp, u_int len)
+{
+ u_int8_t flags;
+ u_int32_t vni;
+
+ if (len < 8) {
+ printf("[|VXLAN]");
+ return;
+ }
+
+ flags = *bp;
+ bp += 4;
+
+ vni = EXTRACT_24BITS(bp);
+ bp += 4;
+
+ printf("VXLAN, ");
+
+ fputs("flags [", stdout);
+ if (flags & 0x08)
+ fputs("I", stdout);
+ else
+ fputs(".", stdout);
+ fputs("] ", stdout);
+
+ printf("(0x%02x), ", flags);
+ printf("vni %u\n", vni);
+
+ ether_print(gndo, bp, len - 8, len - 8, NULL, NULL);
+ return;
+}