Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 168 insertions, 0 deletions

diff --git a/epan/dissectors/packet-bofl.c b/epan/dissectors/packet-bofl.c
new file mode 100644
index 00000000..35f3122d
--- /dev/null
+++ b/epan/dissectors/packet-bofl.c
@@ -0,0 +1,168 @@
+/* packet-bofl.c
+ * Routines for Wellfleet BOFL dissection
+ * Wellfleet -> Baynetworks -> Nortel -> Avaya -> Extremenetworks
+ * Protocol is now called Simple Loop Protection Protocol (SLPP)
+ * Author: Endoh Akira (endoh@netmarks.co.jp)
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * The following information was copied from
+ * http://web.archive.org/web/20150608035209/http://www.protocols.com/pbook/bridge.htm#WellfleetBOFL
+ *
+ * The Wellfleet Breath of Life (BOFL) protocol is used as a line sensing
+ * protocol on:
+ *
+ * - Ethernet LANs to detect transmitter jams.
+ * - Synchronous lines running WFLT STD protocols to determine if the line
+ *   is up.
+ * - Dial backup PPP lines.
+ *
+ * The frame format of Wellfleet BOFL is shown following the Ethernet header
+ * in the following illustration:
+ *
+ *  Destination   Source    8102    PDU   Sequence   Padding
+ *       6           6        2      4       4       n bytes
+ */
+
+/* From the above link:
+ *
+ * Wellfleet BOFL
+ *
+ * The Wellfleet Breath of Life (BOFL) protocol is used as a line sensing protocol on:
+ *
+ * Ethernet LANs to detect transmitter jams.
+ * Synchronous lines running WFLT STD protocols to determine if the line is up.
+ * Dial backup PPP lines.
+ * The frame format of Wellfleet BOFL is shown following the Ethernet header in the following illustration:
+ *
+ * Destination | Source |8102 | PDU | Sequence | Padding
+ *  6          |  6     | 2   |  4  |  4       | n bytes
+ * <-------------------------->
+ *       Ethernet Header
+ *
+ * 8102
+ * EtherType (0x8102 for Wellfleet BOFL frames).
+ *
+ * PDU
+ * PDU field normally equals 0x01010000, but may equal 0x01011111 in some new releases on synchronous links.
+ *
+ * Sequence
+ * 4-byte sequence field is an incremental counter.
+ *
+ * Padding
+ * Padding to fill out the frame to 64 bytes.
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+
+#define ETHER_TYPE_SLPP 0x8102
+#define BOFL_MIN_LEN    8
+
+void proto_register_bofl(void);
+void proto_reg_handoff_bofl(void);
+
+static dissector_handle_t bofl_handle;
+
+/* Initialize the protocol and registered fields */
+static int proto_bofl       = -1;
+static int hf_bofl_pdu      = -1;
+static int hf_bofl_sequence = -1;
+static int hf_bofl_padding  = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_bofl = -1;
+
+/* Code to actually dissect the packets */
+static int
+dissect_bofl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    proto_item  *ti;
+    proto_tree  *bofl_tree;
+    gint        len;
+    guint32     pdu, sequence;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "BOFL");
+
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    ti = proto_tree_add_item(tree, proto_bofl, tvb, 0, -1, ENC_NA);
+    bofl_tree = proto_item_add_subtree(ti, ett_bofl);
+
+    pdu = tvb_get_ntohl(tvb, 0);
+    col_add_fstr(pinfo->cinfo, COL_INFO,
+        "PDU: 0x%08x", pdu);
+    proto_tree_add_uint(bofl_tree, hf_bofl_pdu, tvb, 0, 4, pdu);
+
+    sequence = tvb_get_ntohl(tvb, 4);
+
+    col_append_fstr(pinfo->cinfo, COL_INFO,
+        " Sequence: %u", sequence);
+
+    proto_tree_add_uint(bofl_tree, hf_bofl_sequence, tvb, 4, 4, sequence);
+
+    len = tvb_reported_length_remaining(tvb, 8);
+    if (len > 0)
+        proto_tree_add_item(bofl_tree, hf_bofl_padding, tvb, 8, -1, ENC_NA);
+
+    return tvb_captured_length(tvb);
+}
+
+
+void
+proto_register_bofl(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_bofl_pdu,
+          { "PDU", "bofl.pdu",
+            FT_UINT32, BASE_HEX, NULL, 0,
+            "PDU; normally equals 0x01010000 or 0x01011111", HFILL }
+        },
+        { &hf_bofl_sequence,
+          { "Sequence", "bofl.sequence",
+            FT_UINT32, BASE_DEC, NULL, 0,
+            "incremental counter", HFILL }
+        },
+        { &hf_bofl_padding,
+          { "Padding", "bofl.padding",
+            FT_BYTES, BASE_NONE, NULL, 0,
+            NULL, HFILL }
+        }
+    };
+
+    static gint *ett[] = {
+        &ett_bofl,
+    };
+
+    proto_bofl = proto_register_protocol("Wellfleet Breath of Life",
+                                         "BOFL", "bofl");
+    proto_register_field_array(proto_bofl, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    bofl_handle = register_dissector("bofl", dissect_bofl, proto_bofl);
+}
+
+
+void
+proto_reg_handoff_bofl(void)
+{
+    dissector_add_uint("ethertype", ETHER_TYPE_SLPP, bofl_handle);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */