diff --git a/print-atm.c b/print-atm.c
index d664d6e..b132a6d 100644
--- a/print-atm.c
+++ b/print-atm.c
@@ -20,7 +20,7 @@
  */
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38.2.6 2006/01/25 13:27:24 hannes Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.49 2007-10-22 19:37:51 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -43,41 +43,75 @@
 
 #include "ether.h"
 
-struct tok oam_f_values[] = {
-    { OAMF4SC, "OAM F4 (segment)" },
-    { OAMF4EC, "OAM F4 (end)" },
+#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 }
 };
 
-struct tok oam_celltype_values[] = {
-    { 0x1, "Fault Management" },
-    { 0x2, "Performance Management" },
-    { 0x8, "activate/deactivate" },
-    { 0xf, "System Management" },
+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 }
 };
 
-struct tok oam_fm_functype_values[] = {
-    { 0x0, "AIS" },
-    { 0x1, "RDI" },
-    { 0x4, "Continuity Check" },
-    { 0x8, "Loopback" },
+#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 }
 };
 
-struct tok oam_pm_functype_values[] = {
+#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 }
 };
 
-struct tok oam_ad_functype_values[] = {
+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 */
@@ -195,7 +229,7 @@
 /*
  * ATM signalling.
  */
-static struct tok msgtype2str[] = {
+static const struct tok msgtype2str[] = {
 	{ CALL_PROCEED,		"Call_proceeding" },
 	{ CONNECT,		"Connect" },
 	{ CONNECT_ACK,		"Connect_ack" },
@@ -236,10 +270,12 @@
 		printf(":%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]);
 		printf("CALL_REF:0x%06x", call_ref);
 	} else {
@@ -261,24 +297,24 @@
 	if (vpi == 0) {
 		switch (vci) {
 
-		case PPC:
+		case VCI_PPC:
 			sig_print(p, caplen);
 			return;
 
-		case BCC:
+		case VCI_BCC:
 			printf("broadcast sig: ");
 			return;
 
-		case OAMF4SC: /* fall through */
-		case OAMF4EC:
+		case VCI_OAMF4SC: /* fall through */
+		case VCI_OAMF4EC:
                         oam_print(p, length, ATM_OAM_HEC);
 			return;
 
-		case METAC:
+		case VCI_METAC:
 			printf("meta: ");
 			return;
 
-		case ILMIC:
+		case VCI_ILMIC:
 			printf("ilmi: ");
 			snmp_print(p, length);
 			return;
@@ -301,26 +337,53 @@
 	}
 }
 
+struct oam_fm_loopback_t {
+    u_int8_t loopback_indicator;
+    u_int8_t correlation_tag[4];
+    u_int8_t loopback_id[12];
+    u_int8_t source_id[12];
+    u_int8_t unused[16];
+};
+
+struct oam_fm_ais_rdi_t {
+    u_int8_t failure_type;
+    u_int8_t failure_location[16];
+    u_int8_t unused[28];
+};
+
 int 
 oam_print (const u_char *p, u_int length, u_int hec) {
 
     u_int32_t cell_header;
-    u_int16_t cell_type, func_type,vpi,vci,payload,clp;
+    u_int16_t vpi, vci, cksum, cksum_shouldbe, idx;
+    u_int8_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+4+hec))>>4) & 0x0f;
-    func_type = *(p+4+hec) & 0x0f;
+    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;
 
-    printf("%s, vpi %u, vci %u, payload %u, clp %u, ",
+    printf("%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
            tok2str(oam_f_values, "OAM F5", vci),
-           vpi, vci, payload, clp);
+           vpi, vci,
+           tok2str(atm_pty_values, "Unknown", payload),
+           clp, length);
 
-    printf("cell-type %s (%u)",
+    if (!vflag) {
+        return 1;
+    }
+
+    printf("\n\tcell-type %s (%u)",
            tok2str(oam_celltype_values, "unknown", cell_type),
            cell_type);
 
@@ -328,9 +391,61 @@
         printf(", func-type unknown (%u)", func_type);
     else
         printf(", func-type %s (%u)",
-               bittok2str(oam_functype_values[cell_type],"none",func_type),
+               tok2str(oam_functype_values[cell_type],"none",func_type),
                func_type);
 
-    printf(", length %u",length);
+    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);
+        printf("\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));
+        printf("\n\tLocation-ID ");
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
+            if (idx % 2) {
+                printf("%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx]));
+            }
+        }
+        printf("\n\tSource-ID   ");
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
+            if (idx % 2) {
+                printf("%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);
+        printf("\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type);
+        printf("\n\tLocation-ID ");
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
+            if (idx % 2) {
+                printf("%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);
+    
+    printf("\n\tcksum 0x%03x (%scorrect)",
+           cksum,
+           cksum_shouldbe == 0 ? "" : "in");
+
     return 1;
 }