InfiniBand support for tcpdump.

InfiniBand support for tcpdump.
This is an in-house patch. Sent upstream for potential inclusion in future
versions of tcpdump.

(also adding print-ipoib.c to CMakeLists.txt, asked by @guyharris)

(s/u_int16_t/uint16_t asked by @guyharris)

CMakeLists.txt

@@ -988,6 +988,7 @@ set(NETDISSECT_SOURCE_LIST_C
     print-ipcomp.c
     print-ipfc.c
     print-ipnet.c
+    print-ipoib.c
     print-ipx.c
     print-isakmp.c
     print-isoclns.c

Makefile.in

@@ -151,6 +151,7 @@ LIBNETDISSECT_SRC=\
 	print-ipcomp.c \
 	print-ipfc.c \
 	print-ipnet.c \
+	print-ipoib.c \
 	print-ipx.c \
 	print-isakmp.c \
 	print-isoclns.c \

netdissect.h

@@ -481,6 +481,7 @@ extern u_int ieee802_11_radio_if_print IF_PRINTER_ARGS;
 extern u_int ieee802_15_4_if_print IF_PRINTER_ARGS;
 extern u_int ieee802_15_4_tap_if_print IF_PRINTER_ARGS;
 extern u_int ipfc_if_print IF_PRINTER_ARGS;
+extern u_int ipoib_if_print IF_PRINTER_ARGS;
 extern u_int ipnet_if_print IF_PRINTER_ARGS;
 extern u_int juniper_atm1_if_print IF_PRINTER_ARGS;
 extern u_int juniper_atm2_if_print IF_PRINTER_ARGS;

print-arp.c

@@ -54,6 +54,7 @@ struct  arp_pkthdr {
 #define ARPHRD_ATM2225  19      /* ATM (RFC 2225) */
 #define ARPHRD_STRIP    23      /* Ricochet Starmode Radio hardware format */
 #define ARPHRD_IEEE1394 24      /* IEEE 1394 (FireWire) hardware format */
+#define ARPHRD_INFINIBAND 32    /* InfiniBand RFC 4391 */
         nd_uint16_t ar_pro;     /* format of protocol address */
         nd_uint8_t  ar_hln;     /* length of hardware address */
         nd_uint8_t  ar_pln;     /* length of protocol address */
@@ -114,6 +115,7 @@ static const struct tok arphrd_values[] = {
     { ARPHRD_STRIP, "Strip" },
     { ARPHRD_IEEE1394, "IEEE 1394" },
     { ARPHRD_ATM2225, "ATM" },
+    { ARPHRD_INFINIBAND, "InfiniBand" },
     { 0, NULL }
 };
 

print-ipoib.c

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 
+ *	1997, 2000, 2011, 2012
+ *	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.
+ */
+/*
+ * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+
+#include <stdio.h>
+#include <pcap.h>
+
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+
+extern const struct tok ethertype_values[];
+
+#define	IPOIB_HDRLEN	44
+
+static inline void
+ipoib_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+	uint16_t ether_type;
+	char abuf[40];
+
+	ether_type = GET_BE_U_2(&bp[40]);
+	if (!ndo->ndo_qflag) {
+		(void)printf(", ethertype %s (0x%04x)",
+			     tok2str(ethertype_values,"Unknown", ether_type),
+			     ether_type);
+	} else {
+		(void)printf(", ethertype %s",
+			     tok2str(ethertype_values,"Unknown", ether_type));
+	}
+
+	(void)printf(", length %u: ", length);
+}
+
+/*
+ * Print an InfiniBand frame.
+ * This might be encapsulated within another frame; we might be passed
+ * a pointer to a function that can print header information for that
+ * frame's protocol, and an argument to pass to that function.
+ */
+static void
+ipoib_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen,
+    void (*print_encap_header)(const u_char *), const u_char *encap_header_arg)
+{
+	const u_char *orig_hdr = p;
+	u_int orig_length;
+	u_short ether_type;
+	u_short extracted_ether_type;
+
+	if (caplen < IPOIB_HDRLEN || length < IPOIB_HDRLEN) {
+		printf("[|ipoib]");
+		return;
+	}
+
+	if (ndo->ndo_eflag) {
+		if (print_encap_header != NULL)
+			(*print_encap_header)(encap_header_arg);
+		ipoib_hdr_print(ndo, p, length);
+	}
+	orig_length = length;
+
+	length -= IPOIB_HDRLEN;
+	caplen -= IPOIB_HDRLEN;
+	ether_type = GET_BE_U_2(&p[40]);
+	p += IPOIB_HDRLEN;
+
+	if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
+		/* ether_type not known, print raw packet */
+		if (!ndo->ndo_eflag) {
+			if (print_encap_header != NULL)
+				(*print_encap_header)(encap_header_arg);
+			ipoib_hdr_print(ndo, orig_hdr , orig_length);
+		}
+
+		if (!ndo->ndo_suppress_default_print)
+			ND_DEFAULTPRINT(p, caplen);
+	}
+}
+
+/*
+ * This is the top level routine of the printer.  'p' points
+ * to the ether header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
+ * is the number of bytes actually captured.
+ */
+u_int
+ipoib_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
+{
+	ipoib_print(ndo, p, h->len, h->caplen, NULL, NULL);
+
+	return (IPOIB_HDRLEN);
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */

print.c

@@ -106,6 +106,9 @@ static const struct printer printers[] = {
 #ifdef DLT_IPV6
 	{ raw_if_print,		DLT_IPV6 },
 #endif
+#ifdef DLT_IPOIB
+	{ ipoib_if_print,       DLT_IPOIB },
+#endif
 #ifdef DLT_USB_LINUX
 	{ usb_linux_48_byte_if_print, DLT_USB_LINUX},
 #endif /* DLT_USB_LINUX */