Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 228 insertions, 0 deletions

diff --git a/print-openflow.c b/print-openflow.c
new file mode 100644
index 0000000..6024a21
--- /dev/null
+++ b/print-openflow.c
@@ -0,0 +1,228 @@
+/*
+ * This module implements printing of the very basic (version-independent)
+ * OpenFlow header and iteration over OpenFlow messages. It is intended for
+ * dispatching of version-specific OpenFlow message decoding.
+ *
+ *
+ * Copyright (c) 2013 The TCPDUMP project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* \summary: version-independent OpenFlow printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "openflow.h"
+#include "oui.h"
+
+
+static const struct tok ofver_str[] = {
+	{ OF_VER_1_0,	"1.0" },
+	{ OF_VER_1_1,	"1.1" },
+	{ OF_VER_1_2,	"1.2" },
+	{ OF_VER_1_3,	"1.3" },
+	{ OF_VER_1_4,	"1.4" },
+	{ OF_VER_1_5,	"1.5" },
+	{ 0, NULL }
+};
+
+const struct tok onf_exp_str[] = {
+	{ ONF_EXP_ONF,               "ONF Extensions"                                  },
+	{ ONF_EXP_BUTE,              "Budapest University of Technology and Economics" },
+	{ ONF_EXP_NOVIFLOW,          "NoviFlow"                                        },
+	{ ONF_EXP_L3,                "L3+ Extensions, Vendor Neutral"                  },
+	{ ONF_EXP_L4L7,              "L4-L7 Extensions"                                },
+	{ ONF_EXP_WMOB,              "Wireless and Mobility Extensions"                },
+	{ ONF_EXP_FABS,              "Forwarding Abstractions Extensions"              },
+	{ ONF_EXP_OTRANS,            "Optical Transport Extensions"                    },
+	{ ONF_EXP_NBLNCTU,           "Network Benchmarking Lab, NCTU"                  },
+	{ ONF_EXP_MPCE,              "Mobile Packet Core Extensions"                   },
+	{ ONF_EXP_MPLSTPSPTN,        "MPLS-TP OpenFlow Extensions for SPTN"            },
+	{ 0, NULL }
+};
+
+const char *
+of_vendor_name(const uint32_t vendor)
+{
+	const struct tok *table = (vendor & 0xff000000) == 0 ? oui_values : onf_exp_str;
+	return tok2str(table, "unknown", vendor);
+}
+
+void
+of_bitmap_print(netdissect_options *ndo,
+                const struct tok *t, const uint32_t v, const uint32_t u)
+{
+	/* Assigned bits? */
+	if (v & ~u)
+		ND_PRINT(" (%s)", bittok2str(t, "", v));
+	/* Unassigned bits? */
+	if (v & u)
+		ND_PRINT(" (bogus)");
+}
+
+void
+of_data_print(netdissect_options *ndo,
+              const u_char *cp, const u_int len)
+{
+	if (len == 0)
+		return;
+	/* data */
+	ND_PRINT("\n\t data (%u octets)", len);
+	if (ndo->ndo_vflag >= 2)
+		hex_and_ascii_print(ndo, "\n\t  ", cp, len);
+	else
+		ND_TCHECK_LEN(cp, len);
+}
+
+static void
+of_message_print(netdissect_options *ndo,
+                 const u_char *cp, uint16_t len,
+                 const struct of_msgtypeinfo *mti)
+{
+	/*
+	 * Here "cp" and "len" stand for the message part beyond the common
+	 * OpenFlow 1.0 header, if any.
+	 *
+	 * Most message types are longer than just the header, and the length
+	 * constraints may be complex. When possible, validate the constraint
+	 * completely here (REQ_FIXLEN), otherwise check that the message is
+	 * long enough to begin the decoding (REQ_MINLEN) and have the
+	 * type-specific function do any remaining validation.
+	 */
+
+	if (!mti)
+		goto tcheck_remainder;
+
+	if ((mti->req_what == REQ_FIXLEN && len != mti->req_value) ||
+	    (mti->req_what == REQ_MINLEN && len <  mti->req_value))
+		goto invalid;
+
+	if (!ndo->ndo_vflag || !mti->decoder)
+		goto tcheck_remainder;
+
+	mti->decoder(ndo, cp, len);
+	return;
+
+invalid:
+	nd_print_invalid(ndo);
+tcheck_remainder:
+	ND_TCHECK_LEN(cp, len);
+}
+
+/* Print a TCP segment worth of OpenFlow messages presuming the segment begins
+ * on a message boundary. */
+void
+openflow_print(netdissect_options *ndo, const u_char *cp, u_int len)
+{
+	ndo->ndo_protocol = "openflow";
+	ND_PRINT(": OpenFlow");
+	while (len) {
+		/* Print a single OpenFlow message. */
+		uint8_t version, type;
+		uint16_t length;
+		const struct of_msgtypeinfo *mti;
+
+		/* version */
+		version = GET_U_1(cp);
+		OF_FWD(1);
+		ND_PRINT("\n\tversion %s",
+		         tok2str(ofver_str, "unknown (0x%02x)", version));
+		/* type */
+		if (len < 1)
+			goto partial_header;
+		type = GET_U_1(cp);
+		OF_FWD(1);
+		mti =
+			version == OF_VER_1_0 ? of10_identify_msgtype(type) :
+			version == OF_VER_1_3 ? of13_identify_msgtype(type) :
+			NULL;
+		if (mti && mti->name)
+			ND_PRINT(", type %s", mti->name);
+		else
+			ND_PRINT(", type unknown (0x%02x)", type);
+		/* length */
+		if (len < 2)
+			goto partial_header;
+		length = GET_BE_U_2(cp);
+		OF_FWD(2);
+		ND_PRINT(", length %u%s", length,
+		         length < OF_HEADER_FIXLEN ? " (too short!)" : "");
+		/* xid */
+		if (len < 4)
+			goto partial_header;
+		ND_PRINT(", xid 0x%08x", GET_BE_U_4(cp));
+		OF_FWD(4);
+
+		/*
+		 * When a TCP packet can contain several protocol messages,
+		 * and at the same time a protocol message can span several
+		 * TCP packets, decoding an incomplete message at the end of
+		 * a TCP packet requires attention to detail in this loop.
+		 *
+		 * Message length includes the header length and a message
+		 * always includes the basic header. A message length underrun
+		 * fails decoding of the rest of the current packet. At the
+		 * same time, try decoding as much of the current message as
+		 * possible even when it does not end within the current TCP
+		 * segment.
+		 *
+		 * Specifically, to try to process the message body in this
+		 * iteration do NOT require the header "length" to be small
+		 * enough for the full declared OpenFlow message to fit into
+		 * the remainder of the declared TCP segment, same as the full
+		 * declared TCP segment is not required to fit into the
+		 * captured packet buffer.
+		 *
+		 * But DO require the same at the end of this iteration to
+		 * decrement "len" and to proceed to the next iteration.
+		 * (Ideally the declared TCP payload end will be at or after
+		 * the captured packet buffer end, but stay safe even when
+		 * that's somehow not the case.)
+		 */
+		if (length < OF_HEADER_FIXLEN)
+			goto invalid;
+
+		of_message_print(ndo, cp, length - OF_HEADER_FIXLEN, mti);
+		if (length - OF_HEADER_FIXLEN > len)
+			break;
+		OF_FWD(length - OF_HEADER_FIXLEN);
+	} /* while (len) */
+	return;
+
+partial_header:
+	ND_PRINT(" (end of TCP payload)");
+	ND_TCHECK_LEN(cp, len);
+	return;
+invalid: /* fail the current packet */
+	nd_print_invalid(ndo);
+	ND_TCHECK_LEN(cp, len);
+}