diff options
-rw-r--r-- | epan/dissectors/Makefile.common | 1 | ||||
-rw-r--r-- | epan/dissectors/packet-ethertype.c | 1 | ||||
-rw-r--r-- | epan/dissectors/packet-fcoe.c | 338 | ||||
-rw-r--r-- | epan/etypes.h | 4 |
4 files changed, 344 insertions, 0 deletions
diff --git a/epan/dissectors/Makefile.common b/epan/dissectors/Makefile.common index c05b43a38c..a231c8d9fc 100644 --- a/epan/dissectors/Makefile.common +++ b/epan/dissectors/Makefile.common @@ -369,6 +369,7 @@ CLEAN_DISSECTOR_SRC = \ packet-fcfzs.c \ packet-fcip.c \ packet-fclctl.c \ + packet-fcoe.c \ packet-fcp.c \ packet-fcsb3.c \ packet-fcsp.c \ diff --git a/epan/dissectors/packet-ethertype.c b/epan/dissectors/packet-ethertype.c index 0a4b1ecf58..33fc5a1570 100644 --- a/epan/dissectors/packet-ethertype.c +++ b/epan/dissectors/packet-ethertype.c @@ -131,6 +131,7 @@ const value_string etype_vals[] = { {PPP_PAP, "PPP Password Authentication Protocol" }, {PPP_CCP, "PPP Compression Control Protocol" }, {ETHERTYPE_LLT, "Veritas Low Latency Transport (not officially registered)"}, + {ETHERTYPE_FCOE, "Fibre Channel over Ethernet" }, {0, NULL } }; static void add_dix_trailer(proto_tree *fh_tree, int trailer_id, tvbuff_t *tvb, diff --git a/epan/dissectors/packet-fcoe.c b/epan/dissectors/packet-fcoe.c new file mode 100644 index 0000000000..bd8384585d --- /dev/null +++ b/epan/dissectors/packet-fcoe.c @@ -0,0 +1,338 @@ +/* + * packet-fcoe.c + * Routines for FCoE dissection - Fibre Channel over Ethernet + * Copyright (c) 2006 Nuova Systems, Inc. (jre@nuovasystems.com) + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * Based on packet-fcip.c, Copyright 2001, Dinesh G Dutt (ddutt@cisco.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * For FCoE protocol details, see http://fcoe.com. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <glib.h> + +#include <epan/packet.h> +#include <epan/prefs.h> +#include <epan/crc32.h> +#include <epan/etypes.h> +#include <epan/expert.h> + +#define FCOE_ENCAP_HEADER_LEN 2 + +typedef enum { + FCOE_EOFn = 0x41, + FCOE_EOFt = 0x42, + FCOE_EOFrt = 0x44, + FCOE_EOFdt = 0x46, + FCOE_EOFni = 0x49, + FCOE_EOFdti = 0x4E, + FCOE_EOFrti = 0x4F, + FCOE_EOFa = 0x50 +} fcoe_eof_t; + +typedef enum { + FCOE_SOFf = 0x8, + FCOE_SOFi4 = 0x9, + FCOE_SOFi2 = 0xD, + FCOE_SOFi3 = 0xE, + FCOE_SOFn4 = 0x1, + FCOE_SOFn2 = 0x5, + FCOE_SOFn3 = 0x6, + FCOE_SOFc4 = 0x9 +} fcoe_sof_t; + +static const value_string fcoe_eof_vals[] = { + {FCOE_EOFn, "EOFn" }, + {FCOE_EOFt, "EOFt" }, + {FCOE_EOFrt, "EOFrt" }, + {FCOE_EOFdt, "EOFdt" }, + {FCOE_EOFni, "EOFni" }, + {FCOE_EOFdti, "EOFdti" }, + {FCOE_EOFrti, "EOFrti" }, + {FCOE_EOFa, "EOFa" }, + {0, NULL} +}; + +static const value_string fcoe_sof_vals[] = { + {FCOE_SOFf, "SOFf" }, + {FCOE_SOFi4, "SOFi4" }, + {FCOE_SOFi2, "SOFi2" }, + {FCOE_SOFi3, "SOFi3" }, + {FCOE_SOFn4, "SOFn4" }, + {FCOE_SOFn2, "SOFn2" }, + {FCOE_SOFn3, "SOFn3" }, + {FCOE_SOFc4, "SOFc4" }, + {0, NULL} +}; + +static int proto_fcoe = -1; +static int hf_fcoe_ver = -1; +static int hf_fcoe_len = -1; +static int hf_fcoe_sof = -1; +static int hf_fcoe_eof = -1; +static int hf_fcoe_crc = -1; +static int hf_fcoe_crc_bad = -1; +static int hf_fcoe_crc_good = -1; + +static int ett_fcoe = -1; +static int ett_fcoe_crc = -1; + +static guint fcoe_ethertype = ETHERTYPE_FCOE; + +static dissector_handle_t data_handle; +static dissector_handle_t fc_handle; +static void fcoe_apply_prefs(void); + +static void +dissect_fcoe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + gint eof_offset = 0; + gint frame_len = 0; + guint version; + char *ver; + guint16 len_sof; + gint bytes_remaining = tvb_length_remaining(tvb, 0); + guint8 sof = 0; + guint8 eof = 0; + const char *eof_str; + char *crc_msg; + proto_item *ti; + proto_item *item; + proto_tree *fcoe_tree = NULL; + proto_tree *crc_tree; + tvbuff_t *next_tvb; + gboolean crc_exists; + guint32 crc_computed = 0; + guint32 crc = 0; + + if (bytes_remaining < FCOE_ENCAP_HEADER_LEN) { + return; + } + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "FCOE"); + + len_sof = tvb_get_ntohs(tvb, 0); + frame_len = (len_sof & 0x3ff0) >> 2; + sof = len_sof & 0xf; + version = len_sof >> 14; + next_tvb = tvb_new_subset(tvb, FCOE_ENCAP_HEADER_LEN, -1, frame_len - 4); + + if (tree) { + + /* + * Only version 0 is defined at this point. + * Don't print the version in the short summary if it is zero. + */ + ver = ""; + if (version != 0) { + int ver_buf_len = 16; + ver = ep_alloc(ver_buf_len); + g_snprintf(ver, ver_buf_len, "ver %d ", version); + } + eof_offset = FCOE_ENCAP_HEADER_LEN + frame_len; + eof_str = "none"; + if (tvb_bytes_exist(tvb, eof_offset, 1)) { + eof = tvb_get_guint8(tvb, eof_offset); + eof_str = val_to_str(eof, fcoe_eof_vals, "0x%x"); + } + + /* + * Check the CRC. + */ + crc_msg = ""; + crc_exists = tvb_bytes_exist(tvb, eof_offset - 4, 4); + if (crc_exists) { + crc = tvb_get_ntohl(tvb, eof_offset - 4); + crc_computed = crc32_802_tvb(next_tvb, frame_len - 4); + if (crc != crc_computed) { + crc_msg = " [bad FC CRC]"; + } + } + + ti = proto_tree_add_protocol_format(tree, proto_fcoe, tvb, 0, + FCOE_ENCAP_HEADER_LEN, + "FCoE %s(%s/%s) %d bytes%s", ver, + val_to_str(sof, fcoe_sof_vals, + "0x%x"), + eof_str, frame_len, crc_msg); + + /* Dissect the FCoE header */ + + fcoe_tree = proto_item_add_subtree(ti, ett_fcoe); + proto_tree_add_uint(fcoe_tree, hf_fcoe_sof, tvb, 1, 1, sof); + proto_tree_add_uint(fcoe_tree, hf_fcoe_ver, tvb, 0, 1, version); + proto_tree_add_uint(fcoe_tree, hf_fcoe_len, tvb, 0, 2, frame_len); + + /* + * Create the CRC information. + */ + item = ti; + if (crc_exists) { + if (crc == crc_computed) { + item = proto_tree_add_uint_format(fcoe_tree, hf_fcoe_crc, tvb, + eof_offset - 4, 4, crc, + "CRC: %8.8x [valid]", crc); + } else { + item = proto_tree_add_uint_format(fcoe_tree, hf_fcoe_crc, tvb, + eof_offset - 4, 4, crc, + "CRC: %8.8x " + "[error: should be %8.8x]", + crc, crc_computed); + expert_add_info_format(pinfo, item, PI_CHECKSUM, PI_ERROR, + "Bad FC CRC %8.8x %8.x", + crc, crc_computed); + } + } + crc_tree = proto_item_add_subtree(item, ett_fcoe_crc); + ti = proto_tree_add_boolean(crc_tree, hf_fcoe_crc_bad, tvb, + eof_offset - 4, 4, + crc_exists && crc != crc_computed); + PROTO_ITEM_SET_GENERATED(ti); + ti = proto_tree_add_boolean(crc_tree, hf_fcoe_crc_good, tvb, + eof_offset - 4, 4, + crc_exists && crc == crc_computed); + PROTO_ITEM_SET_GENERATED(ti); + + /* + * Interpret the EOF. + */ + if (tvb_bytes_exist(tvb, eof_offset, 1)) { + proto_tree_add_item(fcoe_tree, hf_fcoe_eof, tvb, eof_offset, 1, 0); + } + } + + /* Set the SOF/EOF flags in the packet_info header */ + pinfo->sof_eof = 0; + if (sof == FCOE_SOFi3 || sof == FCOE_SOFi2 || sof == FCOE_SOFi4) { + pinfo->sof_eof = PINFO_SOF_FIRST_FRAME; + } else if (sof == FCOE_SOFf) { + pinfo->sof_eof = PINFO_SOF_SOFF; + } + + if (eof != FCOE_EOFn) { + pinfo->sof_eof |= PINFO_EOF_LAST_FRAME; + } else if (eof != FCOE_EOFt) { + pinfo->sof_eof |= PINFO_EOF_INVALID; + } + + /* Call the FC Dissector if this is carrying an FC frame */ + + if (fc_handle) { + call_dissector(fc_handle, next_tvb, pinfo, tree); + } else if (data_handle) { + call_dissector(data_handle, next_tvb, pinfo, tree); + } +} + +void +proto_register_fcoe(void) +{ + /* Setup list of header fields See Section 1.6.1 for details*/ + static hf_register_info hf[] = { + { &hf_fcoe_sof, + {"SOF", "fcoe.sof", FT_UINT8, BASE_HEX, VALS(&fcoe_sof_vals), 0, + "", HFILL}}, + { &hf_fcoe_eof, + {"EOF", "fcoe.eof", FT_UINT8, BASE_HEX, VALS(&fcoe_eof_vals), 0, + "", HFILL}}, + { &hf_fcoe_ver, + {"Version", "fcoe.ver", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL}}, + { &hf_fcoe_len, + {"Frame length", "fcoe.len", FT_UINT32, + BASE_DEC, NULL, 0, "", HFILL}}, + { &hf_fcoe_crc, + {"CRC", "fcoe.crc", FT_UINT32, BASE_HEX, NULL, 0, "", HFILL}}, + { &hf_fcoe_crc_good, + {"CRC good", "fcoe.crc_good", FT_BOOLEAN, BASE_NONE, NULL, 0, + "True: CRC matches packet content; " + "False: doesn't match or not checked.", HFILL }}, + { &hf_fcoe_crc_bad, + {"CRC bad", "fcoe.crc_bad", FT_BOOLEAN, BASE_NONE, NULL, 0, + "True: CRC doesn't match packet content; " + "False: matches or not checked.", HFILL }} + }; + static gint *ett[] = { + &ett_fcoe, + &ett_fcoe_crc + }; + module_t *fcoe_module; + + /* Register the protocol name and description */ + proto_fcoe = proto_register_protocol("Fibre Channel over Ethernet", + "FCoE", "fcoe"); + + /* Required function calls to register the header fields and + * subtrees used */ + proto_register_field_array(proto_fcoe, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + fcoe_module = prefs_register_protocol(proto_fcoe, fcoe_apply_prefs); + prefs_register_uint_preference(fcoe_module, + "ethertype", + "Ether Type", + "ethernet type number used for FCOE", + 16, + &fcoe_ethertype); +} + +static void +fcoe_apply_prefs(void) +{ + static guint active_ethertype = 0; + static dissector_handle_t fcoe_handle; + + if (fcoe_handle == 0) { + fcoe_handle = create_dissector_handle(dissect_fcoe, proto_fcoe); + } + if (active_ethertype != fcoe_ethertype) { + if (active_ethertype != 0) { + dissector_delete("ethertype", active_ethertype, fcoe_handle); + } + if (fcoe_handle != 0) { + dissector_add("ethertype", fcoe_ethertype, fcoe_handle); + active_ethertype = fcoe_ethertype; + } + } + data_handle = find_dissector("data"); + fc_handle = find_dissector("fc"); +} + +/* + * This format is required because a script is used to find these + * routines and create the code that calls these routines. + */ +void +proto_reg_handoff_fcoe(void) +{ + fcoe_apply_prefs(); +} diff --git a/epan/etypes.h b/epan/etypes.h index ce7358b8b8..4aa9748f18 100644 --- a/epan/etypes.h +++ b/epan/etypes.h @@ -340,6 +340,10 @@ #define ETHERTYPE_MRP 0x88e3 /* IEC 61158-6-10 Media Redundancy Protocol (MRP) */ #endif +#ifndef ETHERTYPE_FCOE +#define ETHERTYPE_FCOE 0x8906 /* Fibre Channel over Ethernet */ +#endif + #ifndef ETHERTYPE_LOOP #define ETHERTYPE_LOOP 0x9000 /* used for layer 2 testing (do i see my own frames on the wire) */ #endif |