*
* Laurent Deniel <deniel@worldnet.fr>
*
- * $Id: packet-fddi.c,v 1.37 2000/08/07 03:20:33 guy Exp $
+ * $Id: packet-fddi.c,v 1.57 2002/08/02 23:35:49 jmayer Exp $
*
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * 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
# include "config.h"
#endif
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
#include <stdio.h>
+#include <string.h>
#include <glib.h>
-#include "packet.h"
+#include <epan/bitswap.h>
+#include <epan/packet.h>
#include "packet-fddi.h"
#include "packet-llc.h"
-#include "resolv.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;
/* FDDI Frame Control values */
#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_DHOST 1
#define FDDI_P_SHOST 7
-/* "swaptab[i]" is the value of "i" with the bits reversed. */
-static u_char swaptab[256] = {
- 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
- 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
- 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
- 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
- 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
- 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
- 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
- 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
- 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
- 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
- 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
- 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
- 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
- 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
- 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
- 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
- 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
- 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
- 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
- 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
- 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
- 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
- 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
- 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
- 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
- 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
- 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
- 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
- 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
- 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
- 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
- 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
-};
+static dissector_handle_t llc_handle;
+static dissector_handle_t data_handle;
static void
-swap_mac_addr(u_char *swapped_addr, const u_char *orig_addr)
+swap_mac_addr(guchar *swapped_addr, const guchar *orig_addr)
{
int i;
for (i = 0; i < 6; i++) {
- swapped_addr[i] = swaptab[orig_addr[i]];
+ swapped_addr[i] = BIT_SWAP(orig_addr[i]);
}
}
void
-capture_fddi(const u_char *pd, packet_counts *ld)
+capture_fddi(const guchar *pd, int len, packet_counts *ld)
{
int offset = 0, fc;
- if (!BYTES_ARE_IN_FRAME(0, FDDI_HEADER_SIZE)) {
+ if (!BYTES_ARE_IN_FRAME(0, len, FDDI_HEADER_SIZE)) {
ld->other++;
return;
}
case FDDI_FC_LLC_ASYNC + 13 :
case FDDI_FC_LLC_ASYNC + 14 :
case FDDI_FC_LLC_ASYNC + 15 :
- capture_llc(pd, offset, ld);
+ capture_llc(pd, offset, len, ld);
return;
default :
ld->other++;
}
}
-void
+
+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;
- static u_char src[6], dst[6];
- u_char src_swapped[6], dst_swapped[6];
+ proto_tree *fc_tree;
+ static guchar src[6], dst[6];
+ guchar src_swapped[6], dst_swapped[6];
tvbuff_t *next_tvb;
- pinfo->current_proto = "FDDI";
- if (check_col(pinfo->fd, COL_PROTOCOL))
- col_add_str(pinfo->fd, COL_PROTOCOL, "FDDI");
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "FDDI");
fc = (int) tvb_get_guint8(tvb, FDDI_P_FC);
fc_str = fddifc_to_str(fc);
- if (check_col(pinfo->fd, COL_INFO))
- col_add_str(pinfo->fd, COL_INFO, fc_str);
+ 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,
"Fiber Distributed Data Interface, %s", fc_str);
fh_tree = proto_item_add_subtree(ti, ett_fddi);
- proto_tree_add_uint(fh_tree, hf_fddi_fc, tvb, FDDI_P_FC, 1, fc);
+ ti = proto_tree_add_uint_format(fh_tree, hf_fddi_fc, tvb, FDDI_P_FC, 1, fc,
+ "Frame Control: 0x%02x (%s)", 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, 1, fc);
+ switch (fc & FDDI_FC_CLFF) {
+
+ case FDDI_FC_SMT:
+ proto_tree_add_uint(fc_tree, hf_fddi_fc_smt_subtype, tvb, FDDI_P_FC, 1, fc);
+ break;
+
+ case FDDI_FC_MAC:
+ if (fc != FDDI_FC_RT)
+ proto_tree_add_uint(fc_tree, hf_fddi_fc_mac_subtype, tvb, FDDI_P_FC, 1, fc);
+ break;
+
+ case FDDI_FC_LLC_ASYNC:
+ if (!(fc & FDDI_FC_ASYNC_R))
+ proto_tree_add_uint(fc_tree, hf_fddi_fc_prio, tvb, FDDI_P_FC, 1, fc);
+ break;
+ }
}
/* Extract the destination address, possibly bit-swapping it. */
if (bitswapped)
- swap_mac_addr(dst, (u_char *) tvb_get_ptr(tvb, FDDI_P_DHOST, 6));
+ swap_mac_addr(dst, (guchar *) tvb_get_ptr(tvb, FDDI_P_DHOST, 6));
else
- memcpy(dst, (u_char *) tvb_get_ptr(tvb, FDDI_P_DHOST, 6), sizeof dst);
- swap_mac_addr(dst_swapped, (u_char*) tvb_get_ptr(tvb, FDDI_P_DHOST, 6));
+ memcpy(dst, (guchar *) tvb_get_ptr(tvb, FDDI_P_DHOST, 6), sizeof dst);
+ swap_mac_addr(dst_swapped, (guchar*) tvb_get_ptr(tvb, FDDI_P_DHOST, 6));
/* XXX - copy them to some buffer associated with "pi", rather than
just making "dst" static? */
- SET_ADDRESS(&pi.dl_dst, AT_ETHER, 6, &dst[0]);
- SET_ADDRESS(&pi.dst, AT_ETHER, 6, &dst[0]);
+ SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, &dst[0]);
+ SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, &dst[0]);
if (fh_tree) {
proto_tree_add_ether(fh_tree, hf_fddi_dst, tvb, FDDI_P_DHOST, 6, dst);
/* Extract the source address, possibly bit-swapping it. */
if (bitswapped)
- swap_mac_addr(src, (u_char *) tvb_get_ptr(tvb, FDDI_P_SHOST, 6));
+ swap_mac_addr(src, (guchar *) tvb_get_ptr(tvb, FDDI_P_SHOST, 6));
else
- memcpy(src, (u_char *) tvb_get_ptr(tvb, FDDI_P_SHOST, 6), sizeof src);
- swap_mac_addr(src_swapped, (u_char*) tvb_get_ptr(tvb, FDDI_P_SHOST, 6));
+ memcpy(src, (guchar *) tvb_get_ptr(tvb, FDDI_P_SHOST, 6), sizeof src);
+ swap_mac_addr(src_swapped, (guchar*) tvb_get_ptr(tvb, FDDI_P_SHOST, 6));
/* XXX - copy them to some buffer associated with "pi", rather than
just making "src" static? */
- SET_ADDRESS(&pi.dl_src, AT_ETHER, 6, &src[0]);
- SET_ADDRESS(&pi.src, AT_ETHER, 6, &src[0]);
+ SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, &src[0]);
+ SET_ADDRESS(&pinfo->src, AT_ETHER, 6, &src[0]);
if (fh_tree) {
proto_tree_add_ether(fh_tree, hf_fddi_src, tvb, FDDI_P_SHOST, 6, src);
case FDDI_FC_LLC_ASYNC + 13 :
case FDDI_FC_LLC_ASYNC + 14 :
case FDDI_FC_LLC_ASYNC + 15 :
- dissect_llc(next_tvb, pinfo, tree);
+ call_dissector(llc_handle, next_tvb, pinfo, tree);
return;
default :
- dissect_data(next_tvb, pinfo, tree);
+ 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)
{
*/
{ &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" }},
+ "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" }},
+ "Source or Destination Hardware Address", HFILL }},
};
static gint *ett[] = {
&ett_fddi,
+ &ett_fddi_fc,
};
- proto_fddi = proto_register_protocol ("Fiber Distributed Data Interface", "fddi" );
+ 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);
+}
+
+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);
}
git.samba.org / obnox / wireshark / wip.git / blobdiff