diff options
author | Gilbert Ramirez <gram@alumni.rice.edu> | 2004-07-18 18:06:47 +0000 |
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committer | Gilbert Ramirez <gram@alumni.rice.edu> | 2004-07-18 18:06:47 +0000 |
commit | 669db206cb1f270046ad400fff7655e20c63e723 (patch) | |
tree | 4eff24a2e16c8963e497e1fc575f35e6af59bd26 /epan/dissectors/packet-fddi.c | |
parent | ae46c27a38700af669ef907491081f09df6f6b2c (diff) |
Move dissectors to epan/dissectors directory.
Also move ncp222.py, x11-fields, process-x11-fields.pl,
make-reg-dotc, and make-reg-dotc.py.
Adjust #include lines in files that include packet-*.h
files.
svn path=/trunk/; revision=11410
Diffstat (limited to 'epan/dissectors/packet-fddi.c')
-rw-r--r-- | epan/dissectors/packet-fddi.c | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/epan/dissectors/packet-fddi.c b/epan/dissectors/packet-fddi.c new file mode 100644 index 0000000000..a676f5767d --- /dev/null +++ b/epan/dissectors/packet-fddi.c @@ -0,0 +1,498 @@ +/* packet-fddi.c + * Routines for FDDI packet disassembly + * + * Laurent Deniel <laurent.deniel@free.fr> + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <string.h> +#include <glib.h> +#include <epan/bitswap.h> +#include <epan/packet.h> +#include "prefs.h" +#include "packet-fddi.h" +#include "packet-llc.h" +#include "tap.h" + +#include <epan/resolv.h> + +static int proto_fddi = -1; +static int hf_fddi_fc = -1; +static int hf_fddi_fc_clf = -1; +static int hf_fddi_fc_prio = -1; +static int hf_fddi_fc_smt_subtype = -1; +static int hf_fddi_fc_mac_subtype = -1; +static int hf_fddi_dst = -1; +static int hf_fddi_src = -1; +static int hf_fddi_addr = -1; + +static gint ett_fddi = -1; +static gint ett_fddi_fc = -1; + +static int fddi_tap = -1; + +static gboolean fddi_padding = FALSE; + +#define FDDI_PADDING ((fddi_padding) ? 3 : 0) + +/* FDDI Frame Control values */ + +#define FDDI_FC_VOID 0x00 /* Void frame */ +#define FDDI_FC_NRT 0x80 /* Nonrestricted token */ +#define FDDI_FC_RT 0xc0 /* Restricted token */ +#define FDDI_FC_MAC 0xc0 /* MAC frame */ +#define FDDI_FC_SMT 0x40 /* SMT frame */ +#define FDDI_FC_SMT_INFO 0x41 /* SMT Info */ +#define FDDI_FC_SMT_NSA 0x4F /* SMT Next station adrs */ +#define FDDI_FC_SMT_MIN FDDI_FC_SMT_INFO +#define FDDI_FC_SMT_MAX FDDI_FC_SMT_NSA +#define FDDI_FC_MAC_MIN 0xc1 +#define FDDI_FC_MAC_BEACON 0xc2 /* MAC Beacon frame */ +#define FDDI_FC_MAC_CLAIM 0xc3 /* MAC Claim frame */ +#define FDDI_FC_MAC_MAX 0xcf +#define FDDI_FC_LLC_ASYNC 0x50 /* Async. LLC frame */ +#define FDDI_FC_LLC_ASYNC_MIN FDDI_FC_LLC_ASYNC +#define FDDI_FC_LLC_ASYNC_DEF 0x54 +#define FDDI_FC_LLC_ASYNC_MAX 0x5f +#define FDDI_FC_LLC_SYNC 0xd0 /* Sync. LLC frame */ +#define FDDI_FC_LLC_SYNC_MIN FDDI_FC_LLC_SYNC +#define FDDI_FC_LLC_SYNC_MAX 0xd7 +#define FDDI_FC_IMP_ASYNC 0x60 /* Implementor Async. */ +#define FDDI_FC_IMP_ASYNC_MIN FDDI_FC_IMP_ASYNC +#define FDDI_FC_IMP_ASYNC_MAX 0x6f +#define FDDI_FC_IMP_SYNC 0xe0 /* Implementor Synch. */ + +#define FDDI_FC_CLFF 0xF0 /* Class/Length/Format bits */ +#define FDDI_FC_ZZZZ 0x0F /* Control bits */ + +/* + * Async frame ZZZZ bits: + */ +#define FDDI_FC_ASYNC_R 0x08 /* Reserved */ +#define FDDI_FC_ASYNC_PRI 0x07 /* Priority */ + +#define CLFF_BITS(fc) (((fc) & FDDI_FC_CLFF) >> 4) +#define ZZZZ_BITS(fc) ((fc) & FDDI_FC_ZZZZ) + +static const value_string clf_vals[] = { + { CLFF_BITS(FDDI_FC_VOID), "Void" }, + { CLFF_BITS(FDDI_FC_SMT), "SMT" }, + { CLFF_BITS(FDDI_FC_LLC_ASYNC), "Async LLC" }, + { CLFF_BITS(FDDI_FC_IMP_ASYNC), "Implementor Async" }, + { CLFF_BITS(FDDI_FC_NRT), "Nonrestricted Token" }, + { CLFF_BITS(FDDI_FC_MAC), "MAC" }, + { CLFF_BITS(FDDI_FC_LLC_SYNC), "Sync LLC" }, + { CLFF_BITS(FDDI_FC_IMP_SYNC), "Implementor Sync" }, + { 0, NULL } +}; + +static const value_string smt_subtype_vals[] = { + { ZZZZ_BITS(FDDI_FC_SMT_INFO), "Info" }, + { ZZZZ_BITS(FDDI_FC_SMT_NSA), "Next Station Address" }, + { 0, NULL } +}; + +static const value_string mac_subtype_vals[] = { + { ZZZZ_BITS(FDDI_FC_MAC_BEACON), "Beacon" }, + { ZZZZ_BITS(FDDI_FC_MAC_CLAIM), "Claim" }, + { 0, NULL } +}; + +#define FDDI_HEADER_SIZE 13 + +/* field positions */ + +#define FDDI_P_FC 0 +#define FDDI_P_DHOST 1 +#define FDDI_P_SHOST 7 + +static dissector_handle_t llc_handle; +static dissector_handle_t data_handle; + +static void +swap_mac_addr(guint8 *swapped_addr, const guint8 *orig_addr) +{ + int i; + + for (i = 0; i < 6; i++) { + swapped_addr[i] = BIT_SWAP(orig_addr[i]); + } +} + + +void +capture_fddi(const guchar *pd, int len, packet_counts *ld) +{ + int offset = 0, fc; + + if (!BYTES_ARE_IN_FRAME(0, len, FDDI_HEADER_SIZE + FDDI_PADDING)) { + ld->other++; + return; + } + offset = FDDI_PADDING + FDDI_HEADER_SIZE; + + fc = (int) pd[FDDI_P_FC+FDDI_PADDING]; + + switch (fc) { + + /* From now, only 802.2 SNAP (Async. LCC frame) is supported */ + + case FDDI_FC_LLC_ASYNC + 0 : + case FDDI_FC_LLC_ASYNC + 1 : + case FDDI_FC_LLC_ASYNC + 2 : + case FDDI_FC_LLC_ASYNC + 3 : + case FDDI_FC_LLC_ASYNC + 4 : + case FDDI_FC_LLC_ASYNC + 5 : + case FDDI_FC_LLC_ASYNC + 6 : + case FDDI_FC_LLC_ASYNC + 7 : + case FDDI_FC_LLC_ASYNC + 8 : + case FDDI_FC_LLC_ASYNC + 9 : + case FDDI_FC_LLC_ASYNC + 10 : + case FDDI_FC_LLC_ASYNC + 11 : + case FDDI_FC_LLC_ASYNC + 12 : + case FDDI_FC_LLC_ASYNC + 13 : + case FDDI_FC_LLC_ASYNC + 14 : + case FDDI_FC_LLC_ASYNC + 15 : + capture_llc(pd, offset, len, ld); + return; + default : + ld->other++; + return; + + } /* fc */ + +} /* capture_fddi */ + +static gchar * +fddifc_to_str(int fc) +{ + static gchar strbuf[128+1]; + + switch (fc) { + + case FDDI_FC_VOID: /* Void frame */ + return "Void frame"; + + case FDDI_FC_NRT: /* Nonrestricted token */ + return "Nonrestricted token"; + + case FDDI_FC_RT: /* Restricted token */ + return "Restricted token"; + + case FDDI_FC_SMT_INFO: /* SMT Info */ + return "SMT info"; + + case FDDI_FC_SMT_NSA: /* SMT Next station adrs */ + return "SMT Next station address"; + + case FDDI_FC_MAC_BEACON: /* MAC Beacon frame */ + return "MAC beacon"; + + case FDDI_FC_MAC_CLAIM: /* MAC Claim frame */ + return "MAC claim token"; + + default: + switch (fc & FDDI_FC_CLFF) { + + case FDDI_FC_MAC: + sprintf(strbuf, "MAC frame, control %x", fc & FDDI_FC_ZZZZ); + return strbuf; + + case FDDI_FC_SMT: + sprintf(strbuf, "SMT frame, control %x", fc & FDDI_FC_ZZZZ); + return strbuf; + + case FDDI_FC_LLC_ASYNC: + if (fc & FDDI_FC_ASYNC_R) + sprintf(strbuf, "Async LLC frame, control %x", fc & FDDI_FC_ZZZZ); + else + sprintf(strbuf, "Async LLC frame, priority %d", + fc & FDDI_FC_ASYNC_PRI); + return strbuf; + + case FDDI_FC_LLC_SYNC: + if (fc & FDDI_FC_ZZZZ) { + sprintf(strbuf, "Sync LLC frame, control %x", fc & FDDI_FC_ZZZZ); + return strbuf; + } else + return "Sync LLC frame"; + + case FDDI_FC_IMP_ASYNC: + sprintf(strbuf, "Implementor async frame, control %x", + fc & FDDI_FC_ZZZZ); + return strbuf; + + case FDDI_FC_IMP_SYNC: + sprintf(strbuf, "Implementor sync frame, control %x", + fc & FDDI_FC_ZZZZ); + return strbuf; + break; + + default: + return "Unknown frame type"; + } + } +} + + +static void +dissect_fddi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + gboolean bitswapped) +{ + proto_tree *fh_tree = NULL; + proto_item *ti; + gchar *fc_str; + proto_tree *fc_tree; + static guchar src[6], dst[6]; + guchar src_swapped[6], dst_swapped[6]; + tvbuff_t *next_tvb; + static fddi_hdr fddihdrs[4]; + static int fddihdr_num=0; + fddi_hdr *fddihdr; + + fddihdr_num++; + if(fddihdr_num>=4){ + fddihdr_num=0; + } + fddihdr=&fddihdrs[fddihdr_num]; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "FDDI"); + + fddihdr->fc = tvb_get_guint8(tvb, FDDI_P_FC + FDDI_PADDING); + fc_str = fddifc_to_str(fddihdr->fc); + + if (check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, fc_str); + + if (tree) { + ti = proto_tree_add_protocol_format(tree, proto_fddi, tvb, 0, FDDI_HEADER_SIZE+FDDI_PADDING, + "Fiber Distributed Data Interface, %s", fc_str); + fh_tree = proto_item_add_subtree(ti, ett_fddi); + ti = proto_tree_add_uint_format(fh_tree, hf_fddi_fc, tvb, FDDI_P_FC + FDDI_PADDING, 1, fddihdr->fc, + "Frame Control: 0x%02x (%s)", fddihdr->fc, fc_str); + fc_tree = proto_item_add_subtree(ti, ett_fddi_fc); + proto_tree_add_uint(fc_tree, hf_fddi_fc_clf, tvb, FDDI_P_FC + FDDI_PADDING, 1, fddihdr->fc); + switch ((fddihdr->fc) & FDDI_FC_CLFF) { + + case FDDI_FC_SMT: + proto_tree_add_uint(fc_tree, hf_fddi_fc_smt_subtype, tvb, FDDI_P_FC + FDDI_PADDING, 1, fddihdr->fc); + break; + + case FDDI_FC_MAC: + if (fddihdr->fc != FDDI_FC_RT) + proto_tree_add_uint(fc_tree, hf_fddi_fc_mac_subtype, tvb, FDDI_P_FC + FDDI_PADDING, 1, fddihdr->fc); + break; + + case FDDI_FC_LLC_ASYNC: + if (!((fddihdr->fc) & FDDI_FC_ASYNC_R)) + proto_tree_add_uint(fc_tree, hf_fddi_fc_prio, tvb, FDDI_P_FC + FDDI_PADDING, 1, fddihdr->fc); + break; + } + } + + /* Extract the destination address, possibly bit-swapping it. */ + if (bitswapped) + swap_mac_addr(dst, tvb_get_ptr(tvb, FDDI_P_DHOST + FDDI_PADDING, 6)); + else + memcpy(dst, tvb_get_ptr(tvb, FDDI_P_DHOST + FDDI_PADDING, 6), sizeof dst); + swap_mac_addr(dst_swapped, tvb_get_ptr(tvb, FDDI_P_DHOST + FDDI_PADDING, 6)); + + /* XXX - copy them to some buffer associated with "pi", rather than + just making "dst" static? */ + SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, &dst[0]); + SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, &dst[0]); + SET_ADDRESS(&fddihdr->dst, AT_ETHER, 6, &dst[0]); + + if (fh_tree) { + proto_tree_add_ether(fh_tree, hf_fddi_dst, tvb, FDDI_P_DHOST + FDDI_PADDING, 6, dst); + proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_DHOST + FDDI_PADDING, 6, dst); + + /* hide some bit-swapped mac address fields in the proto_tree, just in case */ + proto_tree_add_ether_hidden(fh_tree, hf_fddi_dst, tvb, FDDI_P_DHOST + FDDI_PADDING, 6, dst_swapped); + proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_DHOST + FDDI_PADDING, 6, dst_swapped); + } + + /* Extract the source address, possibly bit-swapping it. */ + if (bitswapped) + swap_mac_addr(src, tvb_get_ptr(tvb, FDDI_P_SHOST + FDDI_PADDING, 6)); + else + memcpy(src, tvb_get_ptr(tvb, FDDI_P_SHOST + FDDI_PADDING, 6), sizeof src); + swap_mac_addr(src_swapped, tvb_get_ptr(tvb, FDDI_P_SHOST + FDDI_PADDING, 6)); + + /* XXX - copy them to some buffer associated with "pi", rather than + just making "src" static? */ + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, &src[0]); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, &src[0]); + SET_ADDRESS(&fddihdr->src, AT_ETHER, 6, &src[0]); + + if (fh_tree) { + proto_tree_add_ether(fh_tree, hf_fddi_src, tvb, FDDI_P_SHOST + FDDI_PADDING, 6, src); + proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_SHOST + FDDI_PADDING, 6, src); + + /* hide some bit-swapped mac address fields in the proto_tree, just in case */ + proto_tree_add_ether_hidden(fh_tree, hf_fddi_src, tvb, FDDI_P_SHOST + FDDI_PADDING, 6, src_swapped); + proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_SHOST + FDDI_PADDING, 6, src_swapped); + } + + next_tvb = tvb_new_subset(tvb, FDDI_HEADER_SIZE + FDDI_PADDING, -1, -1); + + + tap_queue_packet(fddi_tap, pinfo, fddihdr); + + switch (fddihdr->fc) { + + /* From now, only 802.2 SNAP (Async. LCC frame) is supported */ + + case FDDI_FC_LLC_ASYNC + 0 : + case FDDI_FC_LLC_ASYNC + 1 : + case FDDI_FC_LLC_ASYNC + 2 : + case FDDI_FC_LLC_ASYNC + 3 : + case FDDI_FC_LLC_ASYNC + 4 : + case FDDI_FC_LLC_ASYNC + 5 : + case FDDI_FC_LLC_ASYNC + 6 : + case FDDI_FC_LLC_ASYNC + 7 : + case FDDI_FC_LLC_ASYNC + 8 : + case FDDI_FC_LLC_ASYNC + 9 : + case FDDI_FC_LLC_ASYNC + 10 : + case FDDI_FC_LLC_ASYNC + 11 : + case FDDI_FC_LLC_ASYNC + 12 : + case FDDI_FC_LLC_ASYNC + 13 : + case FDDI_FC_LLC_ASYNC + 14 : + case FDDI_FC_LLC_ASYNC + 15 : + call_dissector(llc_handle, next_tvb, pinfo, tree); + return; + + default : + call_dissector(data_handle,next_tvb, pinfo, tree); + return; + + } /* fc */ +} /* dissect_fddi */ + + +static void +dissect_fddi_bitswapped(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_fddi(tvb, pinfo, tree, TRUE); +} + +static void +dissect_fddi_not_bitswapped(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_fddi(tvb, pinfo, tree, FALSE); +} + +void +proto_register_fddi(void) +{ + static hf_register_info hf[] = { + + /* + * XXX - we want this guy to have his own private formatting + * routine, using "fc_to_str()"; if "fc_to_str()" returns + * NULL, just show the hex value, else show the string. + */ + { &hf_fddi_fc, + { "Frame Control", "fddi.fc", FT_UINT8, BASE_HEX, NULL, 0x0, + "", HFILL }}, + + { &hf_fddi_fc_clf, + { "Class/Length/Format", "fddi.fc.clf", FT_UINT8, BASE_HEX, VALS(clf_vals), FDDI_FC_CLFF, + "", HFILL }}, + + { &hf_fddi_fc_prio, + { "Priority", "fddi.fc.prio", FT_UINT8, BASE_DEC, NULL, FDDI_FC_ASYNC_PRI, + "", HFILL }}, + + { &hf_fddi_fc_smt_subtype, + { "SMT Subtype", "fddi.fc.smt_subtype", FT_UINT8, BASE_DEC, VALS(smt_subtype_vals), FDDI_FC_ZZZZ, + "", HFILL }}, + + { &hf_fddi_fc_mac_subtype, + { "MAC Subtype", "fddi.fc.mac_subtype", FT_UINT8, BASE_DEC, VALS(mac_subtype_vals), FDDI_FC_ZZZZ, + "", HFILL }}, + + { &hf_fddi_dst, + { "Destination", "fddi.dst", FT_ETHER, BASE_NONE, NULL, 0x0, + "Destination Hardware Address", HFILL }}, + + { &hf_fddi_src, + { "Source", "fddi.src", FT_ETHER, BASE_NONE, NULL, 0x0, + "", HFILL }}, + + { &hf_fddi_addr, + { "Source or Destination Address", "fddi.addr", FT_ETHER, BASE_NONE, NULL, 0x0, + "Source or Destination Hardware Address", HFILL }}, + + }; + static gint *ett[] = { + &ett_fddi, + &ett_fddi_fc, + }; + + module_t *fddi_module; + + proto_fddi = proto_register_protocol("Fiber Distributed Data Interface", + "FDDI", "fddi"); + proto_register_field_array(proto_fddi, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + /* + * Called from various dissectors for encapsulated FDDI frames. + * We assume the MAC addresses in them aren't bitswapped. + */ + register_dissector("fddi", dissect_fddi_not_bitswapped, proto_fddi); + + fddi_module = prefs_register_protocol(proto_fddi, NULL); + prefs_register_bool_preference(fddi_module, "padding", + "Add 3-byte padding to all FDDI packets", + "Whether the FDDI dissector should add 3-byte padding to all " + "captured FDDI packets (useful with e.g. Tru64 UNIX tcpdump)", + &fddi_padding); + + fddi_tap = register_tap("fddi"); +} + +void +proto_reg_handoff_fddi(void) +{ + dissector_handle_t fddi_handle, fddi_bitswapped_handle; + + /* + * Get a handle for the LLC dissector. + */ + llc_handle = find_dissector("llc"); + data_handle = find_dissector("data"); + + fddi_handle = find_dissector("fddi"); + dissector_add("wtap_encap", WTAP_ENCAP_FDDI, fddi_handle); + fddi_bitswapped_handle = + create_dissector_handle(dissect_fddi_bitswapped, proto_fddi); + dissector_add("wtap_encap", WTAP_ENCAP_FDDI_BITSWAPPED, + fddi_bitswapped_handle); +} |