*
* Laurent Deniel <deniel@worldnet.fr>
*
- * $Id: packet-fddi.c,v 1.2 1998/10/10 18:23:43 gerald Exp $
+ * $Id: packet-fddi.c,v 1.55 2001/12/10 00:25:27 guy 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
-#include <gtk/gtk.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
#include <stdio.h>
-
-#include <pcap.h>
-
-#include "ethereal.h"
+#include <string.h>
+#include <glib.h>
+#include "bitswap.h"
#include "packet.h"
+#include "packet-fddi.h"
+#include "packet-llc.h"
#include "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_VOID 0x00 /* Void frame */
#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_DHOST 1
#define FDDI_P_SHOST 7
-void dissect_fddi(const u_char *pd, frame_data *fd, GtkTree *tree)
+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)
{
+ int i;
+ for (i = 0; i < 6; i++) {
+ swapped_addr[i] = BIT_SWAP(orig_addr[i]);
+ }
+}
+
+
+void
+capture_fddi(const u_char *pd, int len, packet_counts *ld)
+{
int offset = 0, fc;
- GtkWidget *fh_tree, *ti;
- if (fd->cap_len < FDDI_HEADER_SIZE) {
- dissect_data(pd, offset, fd, tree);
+ if (!BYTES_ARE_IN_FRAME(0, len, FDDI_HEADER_SIZE)) {
+ ld->other++;
return;
}
+ offset = FDDI_HEADER_SIZE;
fc = (int) pd[FDDI_P_FC];
- if (fd->win_info[0]) {
- strcpy(fd->win_info[2], get_ether_name((u_char *)&pd[FDDI_P_DHOST]));
- strcpy(fd->win_info[1], get_ether_name((u_char *)&pd[FDDI_P_SHOST]));
- strcpy(fd->win_info[4], "FDDI");
+ 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)
+{
+ int fc;
+ proto_tree *fh_tree = NULL;
+ proto_item *ti;
+ gchar *fc_str;
+ proto_tree *fc_tree;
+ static u_char src[6], dst[6];
+ u_char src_swapped[6], dst_swapped[6];
+ tvbuff_t *next_tvb;
+
+ 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->cinfo, COL_INFO))
+ col_add_str(pinfo->cinfo, COL_INFO, fc_str);
if (tree) {
- ti = add_item_to_tree(GTK_WIDGET(tree), 0, offset,
- "FDDI %s (%d on wire, %d captured)",
- (fc >= FDDI_FC_LLC_ASYNC_MIN && fc <= FDDI_FC_LLC_ASYNC_MAX) ?
- "Async LLC" : "unsupported FC",
- fd->pkt_len, fd->cap_len);
-
- fh_tree = gtk_tree_new();
- add_subtree(ti, fh_tree, ETT_FDDI);
- add_item_to_tree(fh_tree, FDDI_P_FC, 1, "Frame Control: 0x%02x", fc);
- add_item_to_tree(fh_tree, FDDI_P_DHOST, 6, "Destination: %s (%s)",
- ether_to_str((guint8 *) &pd[FDDI_P_DHOST]),
- get_ether_name((u_char *) &pd[FDDI_P_DHOST]));
- add_item_to_tree(fh_tree, FDDI_P_SHOST, 6, "Source: %s (%s)",
- ether_to_str((guint8 *) &pd[FDDI_P_SHOST]),
- get_ether_name((u_char *)&pd[FDDI_P_SHOST]));
+ 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);
+ 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;
}
+ }
- offset = FDDI_HEADER_SIZE;
+ /* Extract the destination address, possibly bit-swapping it. */
+ if (bitswapped)
+ swap_mac_addr(dst, (u_char *) 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));
+
+ /* 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]);
+
+ if (fh_tree) {
+ proto_tree_add_ether(fh_tree, hf_fddi_dst, tvb, FDDI_P_DHOST, 6, dst);
+ proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_DHOST, 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, 6, dst_swapped);
+ proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_DHOST, 6, dst_swapped);
+ }
+
+ /* Extract the source address, possibly bit-swapping it. */
+ if (bitswapped)
+ swap_mac_addr(src, (u_char *) 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));
+
+ /* 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]);
+
+ if (fh_tree) {
+ proto_tree_add_ether(fh_tree, hf_fddi_src, tvb, FDDI_P_SHOST, 6, src);
+ proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_SHOST, 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, 6, src_swapped);
+ proto_tree_add_ether_hidden(fh_tree, hf_fddi_addr, tvb, FDDI_P_SHOST, 6, src_swapped);
+ }
+
+ next_tvb = tvb_new_subset(tvb, FDDI_HEADER_SIZE, -1, -1);
switch (fc) {
case FDDI_FC_LLC_ASYNC + 13 :
case FDDI_FC_LLC_ASYNC + 14 :
case FDDI_FC_LLC_ASYNC + 15 :
- dissect_llc(pd, offset, fd, tree);
+ call_dissector(llc_handle, next_tvb, pinfo, tree);
return;
default :
- dissect_data(pd, offset, fd, 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)
+{
+ 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,
+ };
+
+ 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