Default to first interface from pcap_findalldevs()

[tcpdump] / print-atm.c

diff --git a/print-atm.c b/print-atm.c
index 6104c361aabf6b6346b6681b426a7541d94f3cb0..7489158b5ba0605c2771d96d50e2415d7dc6c422 100644 (file)
--- a/print-atm.c
+++ b/print-atm.c
@@ -18,130 +18,311 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */

-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.24 2002-07-11 09:17:23 guy Exp $ (LBL)";
-#endif

 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 

-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
+#include <netdissect-stdinc.h>

 
 

-#include <stdio.h>
-#include <pcap.h>
-#include <string.h>
-
-#include "interface.h"
+#include "netdissect.h"

 #include "extract.h"
 #include "addrtoname.h"
 #include "extract.h"
 #include "addrtoname.h"

-#include "ethertype.h"

 #include "atm.h"
 #include "atm.h"

-#include "atmuni31.h"
+#include "llc.h"

 
 

-#include "ether.h"
+/* start of the original atmuni31.h */

 
 /*
 
 /*

- * Print an RFC 1483 LLC-encapsulated ATM frame.
+ * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Yen Yen Lim and
+        North Dakota State University
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.

  */
  */

-static void
-atm_llc_print(const u_char *p, int length, int caplen)
-{
-       struct ether_header ehdr;
-       u_short ether_type;
-       u_short extracted_ethertype;

 
 

-       ether_type = p[6] << 8 | p[7];
+/* Based on UNI3.1 standard by ATM Forum */
+
+/* ATM traffic types based on VPI=0 and (the following VCI */
+#define VCI_PPC                        0x05    /* Point-to-point signal msg */
+#define VCI_BCC                        0x02    /* Broadcast signal msg */
+#define VCI_OAMF4SC            0x03    /* Segment OAM F4 flow cell */
+#define VCI_OAMF4EC            0x04    /* End-to-end OAM F4 flow cell */
+#define VCI_METAC              0x01    /* Meta signal msg */
+#define VCI_ILMIC              0x10    /* ILMI msg */
+
+/* Q.2931 signalling messages */
+#define CALL_PROCEED           0x02    /* call proceeding */
+#define CONNECT                        0x07    /* connect */
+#define CONNECT_ACK            0x0f    /* connect_ack */
+#define SETUP                  0x05    /* setup */
+#define RELEASE                        0x4d    /* release */
+#define RELEASE_DONE           0x5a    /* release_done */
+#define RESTART                        0x46    /* restart */
+#define RESTART_ACK            0x4e    /* restart ack */
+#define STATUS                 0x7d    /* status */
+#define STATUS_ENQ             0x75    /* status ack */
+#define ADD_PARTY              0x80    /* add party */
+#define ADD_PARTY_ACK          0x81    /* add party ack */
+#define ADD_PARTY_REJ          0x82    /* add party rej */
+#define DROP_PARTY             0x83    /* drop party */
+#define DROP_PARTY_ACK         0x84    /* drop party ack */
+
+/* Information Element Parameters in the signalling messages */
+#define CAUSE                  0x08    /* cause */
+#define ENDPT_REF              0x54    /* endpoint reference */
+#define AAL_PARA               0x58    /* ATM adaptation layer parameters */
+#define TRAFF_DESCRIP          0x59    /* atm traffic descriptors */
+#define CONNECT_ID             0x5a    /* connection identifier */
+#define QOS_PARA               0x5c    /* quality of service parameters */
+#define B_HIGHER               0x5d    /* broadband higher layer information */
+#define B_BEARER               0x5e    /* broadband bearer capability */
+#define B_LOWER                        0x5f    /* broadband lower information */
+#define CALLING_PARTY          0x6c    /* calling party number */
+#define CALLED_PARTY           0x70    /* called party nmber */
+
+#define Q2931                  0x09
+
+/* Q.2931 signalling general messages format */
+#define PROTO_POS       0      /* offset of protocol discriminator */
+#define CALL_REF_POS    2      /* offset of call reference value */
+#define MSG_TYPE_POS    5      /* offset of message type */
+#define MSG_LEN_POS     7      /* offset of mesage length */
+#define IE_BEGIN_POS    9      /* offset of first information element */
+
+/* format of signalling messages */
+#define TYPE_POS       0
+#define LEN_POS                2
+#define FIELD_BEGIN_POS 4
+
+/* end of the original atmuni31.h */
+
+static const char tstr[] = "[|atm]";
+
+#define OAM_CRC10_MASK 0x3ff
+#define OAM_PAYLOAD_LEN 48
+#define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
+#define OAM_CELLTYPE_FUNCTYPE_LEN 1
+
+static const struct tok oam_f_values[] = {
+    { VCI_OAMF4SC, "OAM F4 (segment)" },
+    { VCI_OAMF4EC, "OAM F4 (end)" },
+    { 0, NULL }
+};

 
 

-       /*
-        * Fake up an Ethernet header for the benefit of printers that
-        * insist on "packetp" pointing to an Ethernet header.
-        */
-       memset(&ehdr, '\0', sizeof ehdr);
+static const struct tok atm_pty_values[] = {
+    { 0x0, "user data, uncongested, SDU 0" },
+    { 0x1, "user data, uncongested, SDU 1" },
+    { 0x2, "user data, congested, SDU 0" },
+    { 0x3, "user data, congested, SDU 1" },
+    { 0x4, "VCC OAM F5 flow segment" },
+    { 0x5, "VCC OAM F5 flow end-to-end" },
+    { 0x6, "Traffic Control and resource Mgmt" },
+    { 0, NULL }
+};

 
 

-       /*
-        * Some printers want to get back at the ethernet addresses.
-        * Rather than pass it all the way down, we set this global.
-        *
-        * Actually, the only printers that use packetp are print-arp.c
-        * and print-bootp.c, and they assume that packetp points to an
-        * Ethernet header.  The right thing to do is to fix them to know
-        * which link type is in use when they excavate. XXX
-        */
-       packetp = (u_char *)&ehdr;
-
-       if (!llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
-           &extracted_ethertype)) {
-               /* ether_type not known, print raw packet */
-               if (extracted_ethertype) {
-                       printf("(LLC %s) ",
-               etherproto_string(htons(extracted_ethertype)));
-               }
-               if (!xflag && !qflag)
-                       default_print(p, caplen);
+#define OAM_CELLTYPE_FM 0x1
+#define OAM_CELLTYPE_PM 0x2
+#define OAM_CELLTYPE_AD 0x8
+#define OAM_CELLTYPE_SM 0xf
+
+static const struct tok oam_celltype_values[] = {
+    { OAM_CELLTYPE_FM, "Fault Management" },
+    { OAM_CELLTYPE_PM, "Performance Management" },
+    { OAM_CELLTYPE_AD, "activate/deactivate" },
+    { OAM_CELLTYPE_SM, "System Management" },
+    { 0, NULL }
+};
+
+#define OAM_FM_FUNCTYPE_AIS       0x0
+#define OAM_FM_FUNCTYPE_RDI       0x1
+#define OAM_FM_FUNCTYPE_CONTCHECK 0x4
+#define OAM_FM_FUNCTYPE_LOOPBACK  0x8
+
+static const struct tok oam_fm_functype_values[] = {
+    { OAM_FM_FUNCTYPE_AIS, "AIS" },
+    { OAM_FM_FUNCTYPE_RDI, "RDI" },
+    { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" },
+    { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" },
+    { 0, NULL }
+};
+
+static const struct tok oam_pm_functype_values[] = {
+    { 0x0, "Forward Monitoring" },
+    { 0x1, "Backward Reporting" },
+    { 0x2, "Monitoring and Reporting" },
+    { 0, NULL }
+};
+
+static const struct tok oam_ad_functype_values[] = {
+    { 0x0, "Performance Monitoring" },
+    { 0x1, "Continuity Check" },
+    { 0, NULL }
+};
+
+#define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1
+
+static const struct tok oam_fm_loopback_indicator_values[] = {
+    { 0x0, "Reply" },
+    { 0x1, "Request" },
+    { 0, NULL }
+};
+
+static const struct tok *oam_functype_values[16] = {
+    NULL,
+    oam_fm_functype_values, /* 1 */
+    oam_pm_functype_values, /* 2 */
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    oam_ad_functype_values, /* 8 */
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+/*
+ * Print an RFC 1483 LLC-encapsulated ATM frame.
+ */
+static u_int
+atm_llc_print(netdissect_options *ndo,
+              const u_char *p, int length, int caplen)
+{
+       int llc_hdrlen;
+
+       llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
+       if (llc_hdrlen < 0) {
+               /* packet not known, print raw packet */
+               if (!ndo->ndo_suppress_default_print)
+                       ND_DEFAULTPRINT(p, caplen);
+               llc_hdrlen = -llc_hdrlen;

        }
        }

+       return (llc_hdrlen);

 }
 
 /*
 }
 
 /*

- * This is the top level routine of the printer.  'p' is the points
- * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
- * 'length' is the length of the packet off the wire, and 'caplen'
+ * Given a SAP value, generate the LLC header value for a UI packet
+ * with that SAP as the source and destination SAP.
+ */
+#define LLC_UI_HDR(sap)        ((sap)<<16 | (sap<<8) | 0x03)
+
+/*
+ * This is the top level routine of the printer.  'p' points
+ * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'

  * is the number of bytes actually captured.
  */
  * is the number of bytes actually captured.
  */

-void
-atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+u_int
+atm_if_print(netdissect_options *ndo,
+             const struct pcap_pkthdr *h, const u_char *p)

 {
        u_int caplen = h->caplen;
        u_int length = h->len;
 {
        u_int caplen = h->caplen;
        u_int length = h->len;

+       uint32_t llchdr;
+       u_int hdrlen = 0;

 
 

-       ++infodelay;
-       ts_print(&h->ts);
-
-       if (caplen < 8) {
-               printf("[|atm]");
-               goto out;
+       if (caplen < 1 || length < 1) {
+               ND_PRINT((ndo, "%s", tstr));
+               return (caplen);

        }
 
        }
 

+        /* Cisco Style NLPID ? */
+        if (*p == LLC_UI) {
+            if (ndo->ndo_eflag)
+                ND_PRINT((ndo, "CNLPID "));
+            isoclns_print(ndo, p + 1, length - 1, caplen - 1);
+            return hdrlen;
+        }
+

        /*
        /*

-        * Some printers want to check that they're not walking off the
-        * end of the packet.
-        * Rather than pass it all the way down, we set this global.
+        * Must have at least a DSAP, an SSAP, and the first byte of the
+        * control field.

         */
         */

-       snapend = p + caplen;
+       if (caplen < 3 || length < 3) {
+               ND_PRINT((ndo, "%s", tstr));
+               return (caplen);
+       }

 
 

-       if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
+       /*
+        * Extract the presumed LLC header into a variable, for quick
+        * testing.
+        * Then check for a header that's neither a header for a SNAP
+        * packet nor an RFC 2684 routed NLPID-formatted PDU nor
+        * an 802.2-but-no-SNAP IP packet.
+        */
+       llchdr = EXTRACT_24BITS(p);
+       if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
+           llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
+           llchdr != LLC_UI_HDR(LLCSAP_IP)) {

                /*
                 * XXX - assume 802.6 MAC header from Fore driver.
                /*
                 * XXX - assume 802.6 MAC header from Fore driver.

-                * XXX - should we also assume it's not a MAC header
-                * if it begins with 0xfe 0xfe 0x03, for RFC 2684
-                * routed NLPID-formatted PDUs?
+                *
+                * Unfortunately, the above list doesn't check for
+                * all known SAPs, doesn't check for headers where
+                * the source and destination SAP aren't the same,
+                * and doesn't check for non-UI frames.  It also
+                * runs the risk of an 802.6 MAC header that happens
+                * to begin with one of those values being
+                * incorrectly treated as an 802.2 header.
+                *
+                * So is that Fore driver still around?  And, if so,
+                * is it still putting 802.6 MAC headers on ATM
+                * packets?  If so, could it be changed to use a
+                * new DLT_IEEE802_6 value if we added it?

                 */
                 */

-               if (eflag)
-                       printf("%04x%04x %04x%04x ",
-                              p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
-                              p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
-                              p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
-                              p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
+               if (caplen < 20 || length < 20) {
+                       ND_PRINT((ndo, "%s", tstr));
+                       return (caplen);
+               }
+               if (ndo->ndo_eflag)
+                       ND_PRINT((ndo, "%08x%08x %08x%08x ",
+                              EXTRACT_32BITS(p),
+                              EXTRACT_32BITS(p+4),
+                              EXTRACT_32BITS(p+8),
+                              EXTRACT_32BITS(p+12)));

                p += 20;
                length -= 20;
                caplen -= 20;
                p += 20;
                length -= 20;
                caplen -= 20;

+               hdrlen += 20;

        }
        }

-       atm_llc_print(p, length, caplen);
-       if (xflag)
-               default_print(p, caplen);
- out:
-       putchar('\n');
+       hdrlen += atm_llc_print(ndo, p, length, caplen);
+       return (hdrlen);

 }
 
 /*
  * ATM signalling.
  */
 }
 
 /*
  * ATM signalling.
  */

-static struct tok msgtype2str[] = {
+static const struct tok msgtype2str[] = {

        { CALL_PROCEED,         "Call_proceeding" },
        { CONNECT,              "Connect" },
        { CONNECT_ACK,          "Connect_ack" },
        { CALL_PROCEED,         "Call_proceeding" },
        { CONNECT,              "Connect" },
        { CONNECT_ACK,          "Connect_ack" },


@@ -161,36 +342,39 @@ static struct tok msgtype2str[] = {
 };
 
 static void
 };
 
 static void

-sig_print(const u_char *p, int caplen)
+sig_print(netdissect_options *ndo,
+          const u_char *p, int caplen)

 {
 {

-       bpf_u_int32 call_ref;
+       uint32_t call_ref;

 
        if (caplen < PROTO_POS) {
 
        if (caplen < PROTO_POS) {

-               printf("[|atm]");
+               ND_PRINT((ndo, "%s", tstr));

                return;
        }
        if (p[PROTO_POS] == Q2931) {
                /*
                return;
        }
        if (p[PROTO_POS] == Q2931) {
                /*

-                * protocol:Q.2931 for User to Network Interface 
+                * protocol:Q.2931 for User to Network Interface

                 * (UNI 3.1) signalling
                 */
                 * (UNI 3.1) signalling
                 */

-               printf("Q.2931");
+               ND_PRINT((ndo, "Q.2931"));

                if (caplen < MSG_TYPE_POS) {
                if (caplen < MSG_TYPE_POS) {

-                       printf(" [|atm]");
+                       ND_PRINT((ndo, " %s", tstr));

                        return;
                }
                        return;
                }

-               printf(":%s ",
-                   tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
+               ND_PRINT((ndo, ":%s ",
+                   tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));

 
 

-               if (caplen < CALL_REF_POS+3) {
-                       printf("[|atm]");
-                       return;
-               }
+               /*
+                * The call reference comes before the message type,
+                * so if we know we have the message type, which we
+                * do from the caplen test above, we also know we have
+                * the call reference.
+                */

                call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
                call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);

-               printf("CALL_REF:0x%06x", call_ref);
+               ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));

        } else {
                /* SCCOP with some unknown protocol atop it */
        } else {
                /* SCCOP with some unknown protocol atop it */

-               printf("SSCOP, proto %d ", p[PROTO_POS]);
+               ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));

        }
 }
 
        }
 }
 


@@ -198,46 +382,37 @@ sig_print(const u_char *p, int caplen)
  * Print an ATM PDU (such as an AAL5 PDU).
  */
 void
  * Print an ATM PDU (such as an AAL5 PDU).
  */
 void

-atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
-    u_int caplen)
+atm_print(netdissect_options *ndo,
+          u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
+          u_int caplen)

 {
 {

-       if (eflag)
-               printf("VPI:%u VCI:%u ", vpi, vci);
-
-       /*
-        * Some printers want to check that they're not walking off the
-        * end of the packet.
-        * Rather than pass it all the way down, we set this global.
-        */
-       snapend = p + caplen;
+       if (ndo->ndo_eflag)
+               ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci));

 
        if (vpi == 0) {
                switch (vci) {
 
 
        if (vpi == 0) {
                switch (vci) {
 

-               case PPC:
-                       sig_print(p, caplen);
-                       goto out;
-
-               case BCC:
-                       printf("broadcast sig: ");
-                       goto out;
+               case VCI_PPC:
+                       sig_print(ndo, p, caplen);
+                       return;

 
 

-               case OAMF4SC:
-                       printf("oamF4(segment): ");
-                       goto out;
+               case VCI_BCC:
+                       ND_PRINT((ndo, "broadcast sig: "));
+                       return;

 
 

-               case OAMF4EC:
-                       printf("oamF4(end): ");
-                       goto out;
+               case VCI_OAMF4SC: /* fall through */
+               case VCI_OAMF4EC:
+                       oam_print(ndo, p, length, ATM_OAM_HEC);
+                       return;

 
 

-               case METAC:
-                       printf("meta: ");
-                       goto out;
+               case VCI_METAC:
+                       ND_PRINT((ndo, "meta: "));
+                       return;

 
 

-               case ILMIC:
-                       printf("ilmi: ");
-                       snmp_print(p, length);
-                       goto out;
+               case VCI_ILMIC:
+                       ND_PRINT((ndo, "ilmi: "));
+                       snmp_print(ndo, p, length);
+                       return;

                }
        }
 
                }
        }
 


@@ -248,15 +423,125 @@ atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
                /*
                 * Assumes traffic is LLC if unknown.
                 */
                /*
                 * Assumes traffic is LLC if unknown.
                 */

-               atm_llc_print(p, length, caplen);
+               atm_llc_print(ndo, p, length, caplen);

                break;
 
        case ATM_LANE:
                break;
 
        case ATM_LANE:

-               lane_print(p, length, caplen);
+               lane_print(ndo, p, length, caplen);

                break;
        }
                break;
        }

+}
+
+struct oam_fm_loopback_t {
+    uint8_t loopback_indicator;
+    uint8_t correlation_tag[4];
+    uint8_t loopback_id[12];
+    uint8_t source_id[12];
+    uint8_t unused[16];
+};

 
 

-out:
-       if (xflag)
-               default_print(p, caplen);
+struct oam_fm_ais_rdi_t {
+    uint8_t failure_type;
+    uint8_t failure_location[16];
+    uint8_t unused[28];
+};
+
+int
+oam_print (netdissect_options *ndo,
+           const u_char *p, u_int length, u_int hec)
+{
+    uint32_t cell_header;
+    uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
+    uint8_t  cell_type, func_type, payload, clp;
+
+    union {
+        const struct oam_fm_loopback_t *oam_fm_loopback;
+        const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
+    } oam_ptr;
+
+
+    cell_header = EXTRACT_32BITS(p+hec);
+    cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f;
+    func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f;
+
+    vpi = (cell_header>>20)&0xff;
+    vci = (cell_header>>4)&0xffff;
+    payload = (cell_header>>1)&0x7;
+    clp = cell_header&0x1;
+
+    ND_PRINT((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
+           tok2str(oam_f_values, "OAM F5", vci),
+           vpi, vci,
+           tok2str(atm_pty_values, "Unknown", payload),
+           clp, length));
+
+    if (!ndo->ndo_vflag) {
+        return 1;
+    }
+
+    ND_PRINT((ndo, "\n\tcell-type %s (%u)",
+           tok2str(oam_celltype_values, "unknown", cell_type),
+           cell_type));
+
+    if (oam_functype_values[cell_type] == NULL)
+        ND_PRINT((ndo, ", func-type unknown (%u)", func_type));
+    else
+        ND_PRINT((ndo, ", func-type %s (%u)",
+               tok2str(oam_functype_values[cell_type],"none",func_type),
+               func_type));
+
+    p += ATM_HDR_LEN_NOHEC + hec;
+
+    switch (cell_type << 4 | func_type) {
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
+        oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
+               tok2str(oam_fm_loopback_indicator_values,
+                       "Unknown",
+                       oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK),
+               EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag)));
+        ND_PRINT((ndo, "\n\tLocation-ID "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
+            }
+        }
+        ND_PRINT((ndo, "\n\tSource-ID   "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx])));
+            }
+        }
+        break;
+
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
+        oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
+        ND_PRINT((ndo, "\n\tLocation-ID "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
+            }
+        }
+        break;
+
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
+        /* FIXME */
+        break;
+
+    default:
+        break;
+    }
+
+    /* crc10 checksum verification */
+    cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+        & OAM_CRC10_MASK;
+    cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
+
+    ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)",
+           cksum,
+           cksum_shouldbe == 0 ? "" : "in"));
+
+    return 1;

 }
 }