*
* Laurent Deniel <deniel@worldnet.fr>
*
- * $Id: packet-fddi.c,v 1.3 1998/10/13 05:12:13 guy Exp $
+ * $Id: packet-fddi.c,v 1.9 1999/02/09 00:35:37 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
# include "config.h"
#endif
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
#include <gtk/gtk.h>
#include <stdio.h>
-#include <pcap.h>
#include "ethereal.h"
#include "packet.h"
#define FDDI_P_DHOST 1
#define FDDI_P_SHOST 7
-void dissect_fddi(const u_char *pd, frame_data *fd, GtkTree *tree)
+/* On some systems, the FDDI MAC addresses are bit-swapped. */
+#if !defined(ultrix) && !defined(__alpha) && !defined(__bsdi)
+#define BIT_SWAPPED_MAC_ADDRS
+#endif
+
+#ifdef BIT_SWAPPED_MAC_ADDRS
+/* "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,
+};
+#endif
+
+static void get_mac_addr(u_char *swapped_addr, const u_char *addr)
{
+ int i;
+ for (i = 0; i < 6; i++) {
+#ifdef BIT_SWAPPED_MAC_ADDRS
+ swapped_addr[i] = swaptab[addr[i]];
+#else
+ swapped_addr[i] = addr[i];
+#endif
+ }
+}
+
+void
+capture_fddi(const u_char *pd, guint32 cap_len, packet_counts *ld) {
+ int offset = 0, fc;
+
+ if (cap_len < FDDI_HEADER_SIZE) {
+ ld->other++;
+ return;
+ }
+ offset = FDDI_HEADER_SIZE;
+
+ fc = (int) pd[FDDI_P_FC];
+
+ 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, cap_len, ld);
+ return;
+
+ default :
+ ld->other++;
+ return;
+
+ } /* fc */
+
+} /* capture_fddi */
+
+void dissect_fddi(const u_char *pd, frame_data *fd, GtkTree *tree)
+{
int offset = 0, fc;
GtkWidget *fh_tree, *ti;
+ u_char src[6], dst[6];
if (fd->cap_len < FDDI_HEADER_SIZE) {
dissect_data(pd, offset, fd, tree);
return;
}
+ /* Extract the source and destination addresses, possibly bit-swapping
+ them. */
+ get_mac_addr(dst, (u_char *)&pd[FDDI_P_DHOST]);
+ get_mac_addr(src, (u_char *)&pd[FDDI_P_SHOST]);
+
fc = (int) pd[FDDI_P_FC];
- if (fd->win_info[COL_NUM]) {
- strcpy(fd->win_info[COL_DESTINATION], get_ether_name((u_char *)&pd[FDDI_P_DHOST]));
- strcpy(fd->win_info[COL_SOURCE], get_ether_name((u_char *)&pd[FDDI_P_SHOST]));
- strcpy(fd->win_info[COL_INFO], "FDDI");
- }
+ if (check_col(fd, COL_RES_DL_SRC))
+ col_add_str(fd, COL_RES_DL_SRC, get_ether_name(src));
+ if (check_col(fd, COL_RES_DL_DST))
+ col_add_str(fd, COL_RES_DL_DST, get_ether_name(dst));
+ if (check_col(fd, COL_UNRES_DL_SRC))
+ col_add_str(fd, COL_UNRES_DL_SRC, ether_to_str(src));
+ if (check_col(fd, COL_UNRES_DL_DST))
+ col_add_str(fd, COL_UNRES_DL_DST, ether_to_str(dst));
+ if (check_col(fd, COL_PROTOCOL))
+ col_add_str(fd, COL_PROTOCOL, "N/A");
+ if (check_col(fd, COL_INFO))
+ col_add_str(fd, COL_INFO, "FDDI");
if (tree) {
ti = add_item_to_tree(GTK_WIDGET(tree), 0, offset,
- "FDDI %s (%d on wire, %d captured)",
+ "FDDI %s",
(fc >= FDDI_FC_LLC_ASYNC_MIN && fc <= FDDI_FC_LLC_ASYNC_MAX) ?
- "Async LLC" : "unsupported FC",
- fd->pkt_len, fd->cap_len);
+ "Async LLC" : "unsupported FC");
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]));
+ ether_to_str(dst), get_ether_name(dst));
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]));
+ ether_to_str(src), get_ether_name(src));
}
offset = FDDI_HEADER_SIZE;
} /* fc */
} /* dissect_fddi */
-