3 * Routines for FCoIB dissection - Fibre Channel over Infiniband
4 * Copyright (c) 2010 Mellanox Technologies Ltd. (slavak@mellanox.co.il)
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * Based on packet-fcoe.c, Copyright (c) 2006 Nuova Systems, Inc. (jre@nuovasystems.com)
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
32 #include <epan/packet.h>
33 #include <epan/prefs.h>
34 #include <epan/crc32-tvb.h>
35 #include <epan/expert.h>
36 #include <epan/addr_resolv.h>
37 #include "packet-infiniband.h"
38 #include "packet-fc.h"
40 void proto_register_fcoib(void);
41 void proto_reg_handoff_fcoib(void);
43 #define FCOIB_HEADER_LEN 16 /* header: encap. header, SOF, and padding */
44 #define FCOIB_TRAILER_LEN 8 /* trailer: FC-CRC, EOF and padding */
45 #define FCOIB_VER_OFFSET 2 /* offset of ver field (in bytes) inside FCoIB Encap. header */
69 static const value_string fcoib_eof_vals[] = {
70 {FCOIB_EOFn, "EOFn" },
71 {FCOIB_EOFt, "EOFt" },
72 {FCOIB_EOFrt, "EOFrt" },
73 {FCOIB_EOFdt, "EOFdt" },
74 {FCOIB_EOFni, "EOFni" },
75 {FCOIB_EOFdti, "EOFdti" },
76 {FCOIB_EOFrti, "EOFrti" },
77 {FCOIB_EOFa, "EOFa" },
81 static const value_string fcoib_sof_vals[] = {
82 {FCOIB_SOFf, "SOFf" },
83 {FCOIB_SOFi4, "SOFi4" },
84 {FCOIB_SOFi2, "SOFi2" },
85 {FCOIB_SOFi3, "SOFi3" },
86 {FCOIB_SOFn4, "SOFn4" },
87 {FCOIB_SOFn2, "SOFn2" },
88 {FCOIB_SOFn3, "SOFn3" },
89 {FCOIB_SOFc4, "SOFc4" },
93 static int proto_fcoib = -1;
94 static int hf_fcoib_ver = -1;
95 static int hf_fcoib_sig = -1;
96 static int hf_fcoib_sof = -1;
97 static int hf_fcoib_eof = -1;
98 static int hf_fcoib_crc = -1;
99 static int hf_fcoib_crc_status = -1;
101 static int ett_fcoib = -1;
103 static expert_field ei_fcoib_crc = EI_INIT;
105 static dissector_handle_t fc_handle;
107 /* global preferences */
108 static gboolean gPREF_HEUR_EN = TRUE;
109 static gboolean gPREF_MAN_EN = FALSE;
110 static gint gPREF_TYPE[2] = {0};
111 static const char *gPREF_ID[2] = {NULL};
112 static guint gPREF_QP[2] = {0};
114 /* source/destination addresses from preferences menu (parsed from gPREF_TYPE[?], gPREF_ID[?]) */
115 static address manual_addr[2];
116 static void *manual_addr_data[2];
118 static const enum_val_t pref_address_types[] = {
124 /* checks if a packet matches the source/destination manually-configured in preferences */
126 manual_addr_match(packet_info *pinfo) {
128 /* If the manual settings are enabled see if this fits - in which case we can skip
129 the following checks entirely and go straight to dissecting */
130 if ( (addresses_equal(&pinfo->src, &manual_addr[0]) &&
131 addresses_equal(&pinfo->dst, &manual_addr[1]) &&
132 (pinfo->srcport == 0xffffffff /* is unknown */ || pinfo->srcport == gPREF_QP[0]) &&
133 (pinfo->destport == 0xffffffff /* is unknown */ || pinfo->destport == gPREF_QP[1])) ||
134 (addresses_equal(&pinfo->src, &manual_addr[1]) &&
135 addresses_equal(&pinfo->dst, &manual_addr[0]) &&
136 (pinfo->srcport == 0xffffffff /* is unknown */ || pinfo->srcport == gPREF_QP[1]) &&
137 (pinfo->destport == 0xffffffff /* is unknown */ || pinfo->destport == gPREF_QP[0])) )
145 dissect_fcoib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
153 gint bytes_remaining;
162 proto_tree *fcoib_tree;
165 guint32 crc_computed = 0;
167 gboolean packet_match_manual;
170 frame_len = tvb_reported_length_remaining(tvb, 0) -
171 FCOIB_HEADER_LEN - FCOIB_TRAILER_LEN;
172 crc_offset = FCOIB_HEADER_LEN + frame_len;
173 eof_offset = crc_offset + 4;
174 sof_offset = FCOIB_HEADER_LEN - 1;
177 return FALSE; /* this packet isn't even long enough to contain the header+trailer w/o FC payload! */
179 packet_match_manual = manual_addr_match(pinfo);
181 if (!packet_match_manual && !gPREF_HEUR_EN)
182 return FALSE; /* user doesn't want us trying to automatically identify FCoIB packets */
184 /* we start off with some basic heuristics checks to make sure this could be a FCoIB packet */
186 if (tvb_bytes_exist(tvb, 0, 1))
187 sig = tvb_get_guint8(tvb, 0) >> 6;
188 if (tvb_bytes_exist(tvb, eof_offset, 1))
189 eof = tvb_get_guint8(tvb, eof_offset);
190 if (tvb_bytes_exist(tvb, sof_offset, 1))
191 sof = tvb_get_guint8(tvb, sof_offset);
193 if (!packet_match_manual) {
195 return FALSE; /* the sig field in the FCoIB Encap. header MUST be 2'b01*/
196 if (!tvb_bytes_exist(tvb, eof_offset + 1, 3) || tvb_get_ntoh24(tvb, eof_offset + 1) != 0)
197 return FALSE; /* 3 bytes of RESERVED field immediately after eEOF MUST be 0 */
198 if (!try_val_to_str(sof, fcoib_sof_vals))
199 return FALSE; /* invalid value for SOF */
200 if (!try_val_to_str(eof, fcoib_eof_vals))
201 return FALSE; /* invalid value for EOF */
205 col_set_str(pinfo->cinfo, COL_PROTOCOL, "FCoIB");
206 bytes_remaining = tvb_captured_length_remaining(tvb, FCOIB_HEADER_LEN);
207 if (bytes_remaining > frame_len)
208 bytes_remaining = frame_len; /* backing length */
209 next_tvb = tvb_new_subset(tvb, FCOIB_HEADER_LEN, bytes_remaining, frame_len);
212 * Only version 0 is defined at this point.
213 * Don't print the version in the short summary if it is zero.
216 version = tvb_get_guint8(tvb, 0 + FCOIB_VER_OFFSET) >> 4;
218 ver = wmem_strdup_printf(wmem_packet_scope(), ver, "ver %d ", version);
221 if (tvb_bytes_exist(tvb, eof_offset, 1)) {
222 eof_str = val_to_str(eof, fcoib_eof_vals, "0x%x");
226 if (tvb_bytes_exist(tvb, sof_offset, 1)) {
227 sof_str = val_to_str(sof, fcoib_sof_vals, "0x%x");
234 crc_exists = tvb_bytes_exist(tvb, crc_offset, 4);
236 crc = tvb_get_ntohl(tvb, crc_offset);
237 crc_computed = crc32_802_tvb(next_tvb, frame_len);
238 if (crc != crc_computed) {
239 crc_msg = " [bad FC CRC]";
243 if ((frame_len % 4) != 0 || frame_len < 24) {
244 len_msg = " [invalid length]";
247 ti = proto_tree_add_protocol_format(tree, proto_fcoib, tvb, 0,
249 "FCoIB %s(%s/%s) %d bytes%s%s", ver,
254 /* Dissect the FCoIB Encapsulation header */
256 fcoib_tree = proto_item_add_subtree(ti, ett_fcoib);
257 proto_tree_add_uint(fcoib_tree, hf_fcoib_sig, tvb, 0, 1, sig);
258 proto_tree_add_uint(fcoib_tree, hf_fcoib_ver, tvb, FCOIB_VER_OFFSET, 1, version);
259 proto_tree_add_uint(fcoib_tree, hf_fcoib_sof, tvb, sof_offset, 1, sof);
262 * Create the CRC information.
265 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);
266 proto_tree_set_appendix(fcoib_tree, tvb, crc_offset,
267 tvb_captured_length_remaining (tvb, crc_offset));
269 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);
275 if (tvb_bytes_exist(tvb, eof_offset, 1)) {
276 proto_tree_add_item(fcoib_tree, hf_fcoib_eof, tvb, eof_offset, 1, ENC_BIG_ENDIAN);
279 /* Set the SOF/EOF flags in the packet_info header */
281 if (sof == FCOIB_SOFi3 || sof == FCOIB_SOFi2 || sof == FCOIB_SOFi4) {
282 fc_data.sof_eof = FC_DATA_SOF_FIRST_FRAME;
283 } else if (sof == FCOIB_SOFf) {
284 fc_data.sof_eof = FC_DATA_SOF_SOFF;
287 if (eof != FCOIB_EOFn) {
288 fc_data.sof_eof |= FC_DATA_EOF_LAST_FRAME;
289 } else if (eof != FCOIB_EOFt) {
290 fc_data.sof_eof |= FC_DATA_EOF_INVALID;
293 /* Call the FC Dissector if this is carrying an FC frame */
294 fc_data.ethertype = 0;
297 call_dissector_with_data(fc_handle, next_tvb, pinfo, tree, &fc_data);
299 call_data_dissector(next_tvb, pinfo, tree);
306 proto_register_fcoib(void)
308 module_t *fcoib_module;
310 /* Setup list of header fields See Section 1.6.1 for details*/
311 static hf_register_info hf[] = {
313 {"SOF", "fcoib.sof", FT_UINT8, BASE_HEX, VALS(fcoib_sof_vals), 0,
316 {"EOF", "fcoib.eof", FT_UINT8, BASE_HEX, VALS(fcoib_eof_vals), 0,
319 {"Signature", "fcoib.sig", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}},
321 {"Version", "fcoib.ver", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL}},
323 {"CRC", "fcoib.crc", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}},
324 { &hf_fcoib_crc_status,
325 {"CRC Status", "fcoib.crc.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 0x0,
328 static gint *ett[] = {
332 static ei_register_info ei[] = {
333 { &ei_fcoib_crc, { "fcoib.crc.bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
336 expert_module_t* expert_fcoib;
338 /* Register the protocol name and description */
339 proto_fcoib = proto_register_protocol("Fibre Channel over Infiniband",
342 /* Required function calls to register the header fields and
344 proto_register_field_array(proto_fcoib, hf, array_length(hf));
345 proto_register_subtree_array(ett, array_length(ett));
346 expert_fcoib = expert_register_protocol(proto_fcoib);
347 expert_register_field_array(expert_fcoib, ei, array_length(ei));
349 fcoib_module = prefs_register_protocol(proto_fcoib, proto_reg_handoff_fcoib);
351 prefs_register_bool_preference(fcoib_module, "heur_en", "Enable heuristic identification of FCoIB packets",
352 "When this option is enabled Wireshark will attempt to identify FCoIB packets automatically "
353 "based on some common features (may generate false positives)",
356 prefs_register_bool_preference(fcoib_module, "manual_en", "Enable manual settings",
357 "Enables dissecting packets between the manually configured source/destination as FCoIB traffic",
360 prefs_register_static_text_preference(fcoib_module, "addr_a", "Address A",
361 "Side A of the manually-configured connection");
362 prefs_register_enum_preference(fcoib_module, "addr_a_type", "Address Type",
363 "Type of address specified", &gPREF_TYPE[0], pref_address_types, FALSE);
364 prefs_register_string_preference(fcoib_module, "addr_a_id", "ID",
365 "LID/GID of address A", &gPREF_ID[0]);
366 prefs_register_uint_preference(fcoib_module, "addr_a_qp", "QP Number",
367 "QP Number for address A", 10, &gPREF_QP[0]);
369 prefs_register_static_text_preference(fcoib_module, "addr_b", "Address B",
370 "Side B of the manually-configured connection");
371 prefs_register_enum_preference(fcoib_module, "addr_b_type", "Address Type",
372 "Type of address specified", &gPREF_TYPE[1], pref_address_types, FALSE);
373 prefs_register_string_preference(fcoib_module, "addr_b_id", "ID",
374 "LID/GID of address B", &gPREF_ID[1]);
375 prefs_register_uint_preference(fcoib_module, "addr_b_qp", "QP Number",
376 "QP Number for address B", 10, &gPREF_QP[1]);
380 proto_reg_handoff_fcoib(void)
382 static gboolean initialized = FALSE;
385 heur_dissector_add("infiniband.payload", dissect_fcoib, "Fibre Channel over Infiniband", "fc_infiniband", proto_fcoib, HEURISTIC_ENABLE);
387 fc_handle = find_dissector_add_dependency("fc", proto_fcoib);
393 /* the manual setting is enabled, so parse the settings into the address type */
394 gboolean error_occured = FALSE;
398 for (i = 0; i < 2; i++) {
399 if (gPREF_ID[i][0] == '\0') {
400 error_occured = TRUE;
401 } else if (gPREF_TYPE[i] == 0) { /* LID */
402 errno = 0; /* reset any previous error indicators */
403 *((guint16*)manual_addr_data[i]) = (guint16)strtoul(gPREF_ID[i], ¬_parsed, 0);
404 if (errno || *not_parsed != '\0') {
405 error_occured = TRUE;
407 set_address(&manual_addr[i], AT_IB, sizeof(guint16), manual_addr_data[i]);
410 if (!str_to_ip6( gPREF_ID[i], manual_addr_data[i])) {
411 error_occured = TRUE;
413 set_address(&manual_addr[i], AT_IB, GID_SIZE, manual_addr_data[i]);
418 /* an invalid id was specified - disable manual settings until it's fixed */
419 gPREF_MAN_EN = FALSE;
428 * Editor modelines - http://www.wireshark.org/tools/modelines.html
433 * indent-tabs-mode: nil
436 * vi: set shiftwidth=4 tabstop=8 expandtab:
437 * :indentSize=4:tabSize=8:noTabs=true: