![Guy Harris](/assets/img/avatar_default.png)
- Decoders for the few remaining FC protocols not included in my first patch. Included in this list are decoders for FC-CT (common transport), Name Server (dNS), Fabric Configuration Server (FCS) and Zone Server (FZS). - Decoder for MDS Debug Port Adapter. MDS Debug Port Adapter (internal name was Boardwalk and this is the file name) is a piece of hardware that can be purchased with Cisco's MDS Fibre Channel switches that converts FC frames into Ethernet frames. One end is connected to a port on a FC switch and the other end is connected to a FE/GE Ethernet port. The decoder included here decodes the encapsulation header that carries information such as SOF/EOF of FC frames. svn path=/trunk/; revision=6919
299 lines
8.8 KiB
C
299 lines
8.8 KiB
C
/* packet-brdwlk.c
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* Routines for decoding MDS Port Analyzer Adapter (FC in Eth) Header
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* Copyright 2001, Dinesh G Dutt <ddutt@andiamo.com>
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*
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* $Id: packet-brdwlk.c,v 1.1 2003/01/14 01:17:44 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* Copied from WHATEVER_FILE_YOU_USED (where "WHATEVER_FILE_YOU_USED"
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* is a dissector file; if you just copied this from README.developer,
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* don't bother with the "Copied from" - you don't even need to put
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* in a "Copied from" if you copied an existing dissector, especially
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* if the bulk of the code in the new dissector is your code)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include <epan/packet.h>
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#include "etypes.h"
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#define BRDWLK_MAX_PACKET_CNT 0xFFFF
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#define BRDWLK_TRUNCATED_BIT 0x8
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#define FCM_DELIM_SOFC1 0x01
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#define FCM_DELIM_SOFI1 0x02
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#define FCM_DELIM_SOFI2 0x04
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#define FCM_DELIM_SOFI3 0x06
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#define FCM_DELIM_SOFN1 0x03
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#define FCM_DELIM_SOFN2 0x05
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#define FCM_DELIM_SOFN3 0x07
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#define FCM_DELIM_SOFF 0x08
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#define FCM_DELIM_SOFC4 0x09
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#define FCM_DELIM_SOFI4 0x0A
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#define FCM_DELIM_SOFN4 0x0B
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#define FCM_DELIM_EOFT 0x01
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#define FCM_DELIM_EOFDT 0x02
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#define FCM_DELIM_EOFN 0x03
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#define FCM_DELIM_EOFA 0x04
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#define FCM_DELIM_EOFNI 0x07
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#define FCM_DELIM_EOFDTI 0x06
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#define FCM_DELIM_EOFRT 0x0A
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#define FCM_DELIM_EOFRTI 0x0E
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#define FCM_DELIM_NOEOF 0xF0
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#define FCM_DELIM_EOFJUMBO 0xF1
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static const value_string brdwlk_sof_vals[] = {
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{FCM_DELIM_SOFI1, "SOFi1"},
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{FCM_DELIM_SOFI2, "SOFi2"},
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{FCM_DELIM_SOFI3, "SOFi3"},
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{FCM_DELIM_SOFN1, "SOFn1"},
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{FCM_DELIM_SOFN2, "SOFn2"},
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{FCM_DELIM_SOFN3, "SOFn3"},
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{FCM_DELIM_SOFF, "SOFf"},
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{0, NULL},
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};
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static const value_string brdwlk_eof_vals[] = {
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{FCM_DELIM_EOFDT, "EOFdt"},
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{FCM_DELIM_EOFA, "EOFa"},
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{FCM_DELIM_EOFN, "EOFn"},
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{FCM_DELIM_EOFT, "EOFt"},
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{0, NULL},
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};
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static const value_string brdwlk_frametype_vals[] = {
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{0, NULL},
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};
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static const value_string brdwlk_error_vals[] = {
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{0, NULL},
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};
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static int hf_brdwlk_sof = -1;
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static int hf_brdwlk_eof = -1;
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static int hf_brdwlk_error = -1;
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static int hf_brdwlk_vsan = -1;
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static int hf_brdwlk_pktcnt = -1;
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static int hf_brdwlk_drop = -1;
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/* Initialize the subtree pointers */
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static gint ett_brdwlk = -1;
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static gint proto_brdwlk = -1;
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static guint16 packet_count = 0;
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static gboolean first_pkt = TRUE; /* start of capture */
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static dissector_handle_t data_handle;
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static dissector_handle_t fc_dissector_handle;
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static gchar *
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brdwlk_err_to_str (guint8 error, char *str)
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{
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if (str != NULL) {
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str[0] = '\0';
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if (error & 0x2) {
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strcat (str, "Empty Frame, ");
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}
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if (error & 0x4) {
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strcat (str, "No Data, ");
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}
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if (error & 0x8) {
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strcat (str, "Truncated, ");
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}
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if (error & 0x10) {
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strcat (str, "Bad FC CRC, ");
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}
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if (error & 0x20) {
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strcat (str, "Fifo Full, ");
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}
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if (error & 0x40) {
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strcat (str, "Jumbo FC Frame, ");
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}
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if (error & 0x80) {
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strcat (str, "Ctrl Char Inside Frame");
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}
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}
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return (str);
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}
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/* Code to actually dissect the packets */
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static void
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dissect_brdwlk (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *brdwlk_tree;
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tvbuff_t *next_tvb;
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guint8 error;
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int hdrlen = 2,
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offset = 0;
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guint16 pkt_cnt;
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gchar errstr[512];
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Boardwalk");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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if (tree) {
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ti = proto_tree_add_protocol_format (tree, proto_brdwlk, tvb, 0,
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hdrlen, "Boardwalk");
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brdwlk_tree = proto_item_add_subtree (ti, ett_brdwlk);
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_sof, tvb, offset, 1, 0);
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_vsan, tvb, offset, 2, 0);
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/* Locate EOF which is the last 4 bytes of the frame */
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offset = tvb_reported_length (tvb) - 4;
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_pktcnt, tvb, offset,
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2, 0);
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pkt_cnt = tvb_get_ntohs (tvb, offset);
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if (pkt_cnt != packet_count + 1) {
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if (first_pkt ||
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(!pkt_cnt && (packet_count == BRDWLK_MAX_PACKET_CNT))) {
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proto_tree_add_boolean_hidden (brdwlk_tree, hf_brdwlk_drop, tvb,
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offset, 1, 0);
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}
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else {
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proto_tree_add_boolean_hidden (brdwlk_tree, hf_brdwlk_drop, tvb,
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offset, 1, 1);
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}
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}
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packet_count = pkt_cnt;
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error = tvb_get_guint8 (tvb, offset+2);
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proto_tree_add_uint_format (brdwlk_tree, hf_brdwlk_error, tvb, offset+2,
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1, error, "Error: 0x%x (%s)",
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error, brdwlk_err_to_str (error, errstr));
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#if 0
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/* If received frame is truncated, set is_truncated flag */
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if (error & BRDWLK_TRUNCATED_BIT) {
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pinfo->is_truncated = TRUE;
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}
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#endif
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_eof, tvb, offset+3,
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1, 0);
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}
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next_tvb = tvb_new_subset (tvb, 2, -1, -1);
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if (fc_dissector_handle) {
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call_dissector (fc_dissector_handle, next_tvb, pinfo, tree);
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}
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}
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/* Register the protocol with Ethereal */
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/* this format is require because a script is used to build the C function
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that calls all the protocol registration.
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*/
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void
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proto_register_brdwlk (void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_brdwlk_sof,
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{"SOF", "brdwlk.sof", FT_UINT8, BASE_HEX, VALS (brdwlk_sof_vals),
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0xF0, "SOF", HFILL}},
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{ &hf_brdwlk_eof,
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{"EOF", "brdwlk.eof", FT_UINT8, BASE_HEX, VALS (brdwlk_eof_vals),
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0x0, "EOF", HFILL}},
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{ &hf_brdwlk_error,
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{"Error", "brdwlk.error", FT_UINT8, BASE_DEC, NULL, 0x0, "Error",
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HFILL}},
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{ &hf_brdwlk_pktcnt,
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{"Packet Count", "brdwlk.pktcnt", FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL}},
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{ &hf_brdwlk_drop,
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{"Packet Dropped", "brdwlk.drop", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
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"", HFILL}},
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{ &hf_brdwlk_vsan,
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{"VSAN", "brdwlk.vsan", FT_UINT16, BASE_DEC, NULL, 0xFFF, "",
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HFILL}},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_brdwlk,
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};
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/* Register the protocol name and description */
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proto_brdwlk = proto_register_protocol("Boardwalk",
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"Boardwalk", "brdwlk");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_brdwlk, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/* If this dissector uses sub-dissector registration add a registration routine.
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This format is required because a script is used to find these routines and
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create the code that calls these routines.
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*/
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void
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proto_reg_handoff_brdwlk(void)
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{
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dissector_handle_t brdwlk_handle;
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brdwlk_handle = create_dissector_handle (dissect_brdwlk, proto_brdwlk);
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dissector_add("ethertype", ETHERTYPE_BRDWALK, brdwlk_handle);
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data_handle = find_dissector("data");
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fc_dissector_handle = find_dissector ("fc");
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}
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