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-rw-r--r--epan/dissectors/packet-fcoib.c357
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diff --git a/epan/dissectors/packet-fcoib.c b/epan/dissectors/packet-fcoib.c
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+++ b/epan/dissectors/packet-fcoib.c
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+/*
+ * packet-fcoib.c
+ * Routines for FCoIB dissection - Fibre Channel over Infiniband
+ * Copyright (c) 2010 Mellanox Technologies Ltd. (slavak@mellanox.co.il)
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * Based on packet-fcoe.c, Copyright (c) 2006 Nuova Systems, Inc. (jre@nuovasystems.com)
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/crc32-tvb.h>
+#include <epan/expert.h>
+#include <epan/addr_resolv.h>
+#include "packet-fc.h"
+
+void proto_register_fcoib(void);
+void proto_reg_handoff_fcoib(void);
+
+#define FCOIB_HEADER_LEN 16 /* header: encap. header, SOF, and padding */
+#define FCOIB_TRAILER_LEN 8 /* trailer: FC-CRC, EOF and padding */
+#define FCOIB_VER_OFFSET 2 /* offset of ver field (in bytes) inside FCoIB Encap. header */
+
+typedef enum {
+ FCOIB_EOFn = 0x41,
+ FCOIB_EOFt = 0x42,
+ FCOIB_EOFrt = 0x44,
+ FCOIB_EOFdt = 0x46,
+ FCOIB_EOFni = 0x49,
+ FCOIB_EOFdti = 0x4E,
+ FCOIB_EOFrti = 0x4F,
+ FCOIB_EOFa = 0x50
+} fcoib_eof_t;
+
+typedef enum {
+ FCOIB_SOFf = 0x28,
+ FCOIB_SOFi4 = 0x29,
+ FCOIB_SOFi2 = 0x2D,
+ FCOIB_SOFi3 = 0x2E,
+ FCOIB_SOFn4 = 0x31,
+ FCOIB_SOFn2 = 0x35,
+ FCOIB_SOFn3 = 0x36,
+ FCOIB_SOFc4 = 0x39
+} fcoib_sof_t;
+
+static const value_string fcoib_eof_vals[] = {
+ {FCOIB_EOFn, "EOFn" },
+ {FCOIB_EOFt, "EOFt" },
+ {FCOIB_EOFrt, "EOFrt" },
+ {FCOIB_EOFdt, "EOFdt" },
+ {FCOIB_EOFni, "EOFni" },
+ {FCOIB_EOFdti, "EOFdti" },
+ {FCOIB_EOFrti, "EOFrti" },
+ {FCOIB_EOFa, "EOFa" },
+ {0, NULL}
+};
+
+static const value_string fcoib_sof_vals[] = {
+ {FCOIB_SOFf, "SOFf" },
+ {FCOIB_SOFi4, "SOFi4" },
+ {FCOIB_SOFi2, "SOFi2" },
+ {FCOIB_SOFi3, "SOFi3" },
+ {FCOIB_SOFn4, "SOFn4" },
+ {FCOIB_SOFn2, "SOFn2" },
+ {FCOIB_SOFn3, "SOFn3" },
+ {FCOIB_SOFc4, "SOFc4" },
+ {0, NULL}
+};
+
+static int proto_fcoib = -1;
+static int hf_fcoib_ver = -1;
+static int hf_fcoib_sig = -1;
+static int hf_fcoib_sof = -1;
+static int hf_fcoib_eof = -1;
+static int hf_fcoib_crc = -1;
+static int hf_fcoib_crc_status = -1;
+
+static int ett_fcoib = -1;
+
+static expert_field ei_fcoib_crc = EI_INIT;
+
+static dissector_handle_t fc_handle;
+
+static int
+dissect_fcoib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+ gint crc_offset;
+ gint eof_offset;
+ gint sof_offset;
+ gint frame_len;
+ guint version;
+ const char *ver;
+ guint8 sof = 0;
+ guint8 eof = 0;
+ guint8 sig = 0;
+ const char *eof_str;
+ const char *sof_str;
+ const char *crc_msg;
+ const char *len_msg;
+ proto_item *ti;
+ proto_tree *fcoib_tree;
+ tvbuff_t *next_tvb;
+ gboolean crc_exists;
+ guint32 crc_computed = 0;
+ guint32 crc = 0;
+ fc_data_t fc_data;
+
+ frame_len = tvb_reported_length_remaining(tvb, 0) -
+ FCOIB_HEADER_LEN - FCOIB_TRAILER_LEN;
+ crc_offset = FCOIB_HEADER_LEN + frame_len;
+ eof_offset = crc_offset + 4;
+ sof_offset = FCOIB_HEADER_LEN - 1;
+
+ if (frame_len <= 0)
+ return 0; /* this packet isn't even long enough to contain the header+trailer w/o FC payload! */
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "FCoIB");
+ next_tvb = tvb_new_subset_length(tvb, FCOIB_HEADER_LEN, frame_len);
+
+ /*
+ * Only version 0 is defined at this point.
+ * Don't print the version in the short summary if it is zero.
+ */
+ ver = "";
+ version = tvb_get_guint8(tvb, 0 + FCOIB_VER_OFFSET) >> 4;
+ if (version != 0)
+ ver = wmem_strdup_printf(pinfo->pool, ver, "ver %d ", version);
+
+ if (tvb_bytes_exist(tvb, 0, 1))
+ sig = tvb_get_guint8(tvb, 0) >> 6;
+
+ eof_str = "none";
+ if (tvb_bytes_exist(tvb, eof_offset, 1)) {
+ eof = tvb_get_guint8(tvb, eof_offset);
+ eof_str = val_to_str(eof, fcoib_eof_vals, "0x%x");
+ }
+
+ sof_str = "none";
+ if (tvb_bytes_exist(tvb, sof_offset, 1)) {
+ sof = tvb_get_guint8(tvb, sof_offset);
+ sof_str = val_to_str(sof, fcoib_sof_vals, "0x%x");
+ }
+
+ /*
+ * Check the CRC.
+ */
+ crc_msg = "";
+ crc_exists = tvb_bytes_exist(tvb, crc_offset, 4);
+ if (crc_exists) {
+ crc = tvb_get_ntohl(tvb, crc_offset);
+ crc_computed = crc32_802_tvb(next_tvb, frame_len);
+ if (crc != crc_computed) {
+ crc_msg = " [bad FC CRC]";
+ }
+ }
+ len_msg = "";
+ if ((frame_len % 4) != 0 || frame_len < 24) {
+ len_msg = " [invalid length]";
+ }
+
+ ti = proto_tree_add_protocol_format(tree, proto_fcoib, tvb, 0,
+ FCOIB_HEADER_LEN,
+ "FCoIB %s(%s/%s) %d bytes%s%s", ver,
+ sof_str, eof_str,
+ frame_len, crc_msg,
+ len_msg);
+
+ /* Dissect the FCoIB Encapsulation header */
+
+ fcoib_tree = proto_item_add_subtree(ti, ett_fcoib);
+ proto_tree_add_uint(fcoib_tree, hf_fcoib_sig, tvb, 0, 1, sig);
+ proto_tree_add_uint(fcoib_tree, hf_fcoib_ver, tvb, FCOIB_VER_OFFSET, 1, version);
+ proto_tree_add_uint(fcoib_tree, hf_fcoib_sof, tvb, sof_offset, 1, sof);
+
+ /*
+ * Create the CRC information.
+ */
+ if (crc_exists) {
+ proto_tree_add_checksum(fcoib_tree, tvb, crc_offset, hf_fcoib_crc, hf_fcoib_crc_status, &ei_fcoib_crc, pinfo, crc_computed, ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY);
+ proto_tree_set_appendix(fcoib_tree, tvb, crc_offset,
+ tvb_captured_length_remaining (tvb, crc_offset));
+ } else {
+ proto_tree_add_checksum(fcoib_tree, tvb, crc_offset, hf_fcoib_crc, hf_fcoib_crc_status, &ei_fcoib_crc, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NOT_PRESENT);
+ }
+
+ /*
+ * Interpret the EOF.
+ */
+ if (tvb_bytes_exist(tvb, eof_offset, 1)) {
+ proto_tree_add_item(fcoib_tree, hf_fcoib_eof, tvb, eof_offset, 1, ENC_BIG_ENDIAN);
+ }
+
+ /* Set the SOF/EOF flags in the packet_info header */
+ fc_data.sof_eof = 0;
+ if (sof == FCOIB_SOFi3 || sof == FCOIB_SOFi2 || sof == FCOIB_SOFi4) {
+ fc_data.sof_eof = FC_DATA_SOF_FIRST_FRAME;
+ } else if (sof == FCOIB_SOFf) {
+ fc_data.sof_eof = FC_DATA_SOF_SOFF;
+ }
+
+ if (eof != FCOIB_EOFn) {
+ fc_data.sof_eof |= FC_DATA_EOF_LAST_FRAME;
+ if (eof != FCOIB_EOFt) {
+ fc_data.sof_eof |= FC_DATA_EOF_INVALID;
+ }
+ }
+
+ /* Call the FC Dissector if this is carrying an FC frame */
+ fc_data.ethertype = ETHERTYPE_UNK;
+
+ if (fc_handle) {
+ call_dissector_with_data(fc_handle, next_tvb, pinfo, tree, &fc_data);
+ } else {
+ call_data_dissector(next_tvb, pinfo, tree);
+ }
+
+ return tvb_captured_length(tvb);
+}
+
+static gboolean
+dissect_fcoib_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+ gint crc_offset;
+ gint eof_offset;
+ gint sof_offset;
+ gint frame_len;
+ guint8 sof = 0;
+ guint8 eof = 0;
+ guint8 sig = 0;
+
+ frame_len = tvb_reported_length_remaining(tvb, 0) -
+ FCOIB_HEADER_LEN - FCOIB_TRAILER_LEN;
+ crc_offset = FCOIB_HEADER_LEN + frame_len;
+ eof_offset = crc_offset + 4;
+ sof_offset = FCOIB_HEADER_LEN - 1;
+
+ if (frame_len <= 0)
+ return FALSE; /* this packet isn't even long enough to contain the header+trailer w/o FC payload! */
+
+ /* we start off with some basic heuristics checks to make sure this could be a FCoIB packet */
+
+ if (tvb_bytes_exist(tvb, 0, 1))
+ sig = tvb_get_guint8(tvb, 0) >> 6;
+ if (tvb_bytes_exist(tvb, eof_offset, 1))
+ eof = tvb_get_guint8(tvb, eof_offset);
+ if (tvb_bytes_exist(tvb, sof_offset, 1))
+ sof = tvb_get_guint8(tvb, sof_offset);
+
+ if (sig != 1)
+ return FALSE; /* the sig field in the FCoIB Encap. header MUST be 2'b01*/
+ if (!tvb_bytes_exist(tvb, eof_offset + 1, 3) || tvb_get_ntoh24(tvb, eof_offset + 1) != 0)
+ return FALSE; /* 3 bytes of RESERVED field immediately after eEOF MUST be 0 */
+ if (!try_val_to_str(sof, fcoib_sof_vals))
+ return FALSE; /* invalid value for SOF */
+ if (!try_val_to_str(eof, fcoib_eof_vals))
+ return FALSE; /* invalid value for EOF */
+
+ dissect_fcoib(tvb, pinfo, tree, data);
+ return TRUE;
+}
+
+void
+proto_register_fcoib(void)
+{
+ module_t *fcoib_module;
+
+ /* Setup list of header fields See Section 1.6.1 for details*/
+ static hf_register_info hf[] = {
+ { &hf_fcoib_sof,
+ {"SOF", "fcoib.sof", FT_UINT8, BASE_HEX, VALS(fcoib_sof_vals), 0,
+ NULL, HFILL}},
+ { &hf_fcoib_eof,
+ {"EOF", "fcoib.eof", FT_UINT8, BASE_HEX, VALS(fcoib_eof_vals), 0,
+ NULL, HFILL}},
+ { &hf_fcoib_sig,
+ {"Signature", "fcoib.sig", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}},
+ { &hf_fcoib_ver,
+ {"Version", "fcoib.ver", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL}},
+ { &hf_fcoib_crc,
+ {"CRC", "fcoib.crc", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}},
+ { &hf_fcoib_crc_status,
+ {"CRC Status", "fcoib.crc.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 0x0,
+ NULL, HFILL }},
+ };
+ static gint *ett[] = {
+ &ett_fcoib,
+ };
+
+ static ei_register_info ei[] = {
+ { &ei_fcoib_crc, { "fcoib.crc.bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
+ };
+
+ expert_module_t* expert_fcoib;
+
+ /* Register the protocol name and description */
+ proto_fcoib = proto_register_protocol("Fibre Channel over Infiniband",
+ "FCoIB", "fcoib");
+
+ /* Required function calls to register the header fields and
+ * subtrees used */
+ proto_register_field_array(proto_fcoib, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ expert_fcoib = expert_register_protocol(proto_fcoib);
+ expert_register_field_array(expert_fcoib, ei, array_length(ei));
+
+ fcoib_module = prefs_register_protocol(proto_fcoib, NULL);
+
+ prefs_register_static_text_preference(fcoib_module, "use_decode_as",
+ "Heuristic matching preferences removed. Use Infiniband protocol preferences or Decode As.",
+ "Simple heuristics can still be enable (may generate false positives) through Infiniband protocol preferences."
+ "To force FCoIB dissection use Decode As");
+
+ prefs_register_obsolete_preference(fcoib_module, "heur_en");
+ prefs_register_obsolete_preference(fcoib_module, "manual_en");
+
+ prefs_register_obsolete_preference(fcoib_module, "addr_a");
+ prefs_register_obsolete_preference(fcoib_module, "addr_a_type");
+ prefs_register_obsolete_preference(fcoib_module, "addr_a_id");
+ prefs_register_obsolete_preference(fcoib_module, "addr_a_qp");
+
+ prefs_register_obsolete_preference(fcoib_module, "addr_b");
+ prefs_register_obsolete_preference(fcoib_module, "addr_b_type");
+ prefs_register_obsolete_preference(fcoib_module, "addr_b_id");
+ prefs_register_obsolete_preference(fcoib_module, "addr_b_qp");
+}
+
+void
+proto_reg_handoff_fcoib(void)
+{
+ heur_dissector_add("infiniband.payload", dissect_fcoib_heur, "Fibre Channel over Infiniband", "fc_infiniband", proto_fcoib, HEURISTIC_ENABLE);
+
+ dissector_add_for_decode_as("infiniband", create_dissector_handle( dissect_fcoib, proto_fcoib ) );
+
+ fc_handle = find_dissector_add_dependency("fc", proto_fcoib);
+}
+
+/*
+ * 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:
+ */
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