Adding upstream version 4.99.3.upstream/4.99.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 701 insertions, 0 deletions

diff --git a/print-atalk.c b/print-atalk.c
new file mode 100644
index 0000000..d9f86c7
--- /dev/null
+++ b/print-atalk.c
@@ -0,0 +1,701 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: AppleTalk printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+#include "extract.h"
+#include "appletalk.h"
+
+
+static const struct tok type2str[] = {
+	{ ddpRTMP,		"rtmp" },
+	{ ddpRTMPrequest,	"rtmpReq" },
+	{ ddpECHO,		"echo" },
+	{ ddpIP,		"IP" },
+	{ ddpARP,		"ARP" },
+	{ ddpKLAP,		"KLAP" },
+	{ 0,			NULL }
+};
+
+struct aarp {
+	nd_uint16_t	htype, ptype;
+	nd_uint8_t	halen, palen;
+	nd_uint16_t	op;
+	nd_mac_addr	hsaddr;
+	uint8_t		psaddr[4];
+	nd_mac_addr	hdaddr;
+	uint8_t		pdaddr[4];
+};
+
+static void atp_print(netdissect_options *, const struct atATP *, u_int);
+static void atp_bitmap_print(netdissect_options *, u_char);
+static void nbp_print(netdissect_options *, const struct atNBP *, u_int, u_short, u_char, u_char);
+static const struct atNBPtuple *nbp_tuple_print(netdissect_options *ndo, const struct atNBPtuple *,
+						const u_char *,
+						u_short, u_char, u_char);
+static const struct atNBPtuple *nbp_name_print(netdissect_options *, const struct atNBPtuple *,
+					       const u_char *);
+static const char *ataddr_string(netdissect_options *, u_short, u_char);
+static void ddp_print(netdissect_options *, const u_char *, u_int, u_int, u_short, u_char, u_char);
+static const char *ddpskt_string(netdissect_options *, u_int);
+
+/*
+ * Print LLAP packets received on a physical LocalTalk interface.
+ */
+void
+ltalk_if_print(netdissect_options *ndo,
+               const struct pcap_pkthdr *h, const u_char *p)
+{
+	u_int hdrlen;
+
+	ndo->ndo_protocol = "ltalk";
+	hdrlen = llap_print(ndo, p, h->len);
+	if (hdrlen == 0) {
+		/* Cut short by the snapshot length. */
+		ndo->ndo_ll_hdr_len += h->caplen;
+		return;
+	}
+	ndo->ndo_ll_hdr_len += hdrlen;
+}
+
+/*
+ * Print AppleTalk LLAP packets.
+ */
+u_int
+llap_print(netdissect_options *ndo,
+           const u_char *bp, u_int length)
+{
+	const struct LAP *lp;
+	const struct atDDP *dp;
+	const struct atShortDDP *sdp;
+	u_short snet;
+	u_int hdrlen;
+
+	ndo->ndo_protocol = "llap";
+	if (length < sizeof(*lp)) {
+		ND_PRINT(" [|llap %u]", length);
+		return (length);
+	}
+	if (!ND_TTEST_LEN(bp, sizeof(*lp))) {
+		nd_print_trunc(ndo);
+		return (0);	/* cut short by the snapshot length */
+	}
+	lp = (const struct LAP *)bp;
+	bp += sizeof(*lp);
+	length -= sizeof(*lp);
+	hdrlen = sizeof(*lp);
+	switch (GET_U_1(lp->type)) {
+
+	case lapShortDDP:
+		if (length < ddpSSize) {
+			ND_PRINT(" [|sddp %u]", length);
+			return (length);
+		}
+		if (!ND_TTEST_LEN(bp, ddpSSize)) {
+			ND_PRINT(" [|sddp]");
+			return (0);	/* cut short by the snapshot length */
+		}
+		sdp = (const struct atShortDDP *)bp;
+		ND_PRINT("%s.%s",
+		    ataddr_string(ndo, 0, GET_U_1(lp->src)),
+		    ddpskt_string(ndo, GET_U_1(sdp->srcSkt)));
+		ND_PRINT(" > %s.%s:",
+		    ataddr_string(ndo, 0, GET_U_1(lp->dst)),
+		    ddpskt_string(ndo, GET_U_1(sdp->dstSkt)));
+		bp += ddpSSize;
+		length -= ddpSSize;
+		hdrlen += ddpSSize;
+		ddp_print(ndo, bp, length, GET_U_1(sdp->type), 0,
+			  GET_U_1(lp->src), GET_U_1(sdp->srcSkt));
+		break;
+
+	case lapDDP:
+		if (length < ddpSize) {
+			ND_PRINT(" [|ddp %u]", length);
+			return (length);
+		}
+		if (!ND_TTEST_LEN(bp, ddpSize)) {
+			ND_PRINT(" [|ddp]");
+			return (0);	/* cut short by the snapshot length */
+		}
+		dp = (const struct atDDP *)bp;
+		snet = GET_BE_U_2(dp->srcNet);
+		ND_PRINT("%s.%s",
+			 ataddr_string(ndo, snet, GET_U_1(dp->srcNode)),
+			 ddpskt_string(ndo, GET_U_1(dp->srcSkt)));
+		ND_PRINT(" > %s.%s:",
+		    ataddr_string(ndo, GET_BE_U_2(dp->dstNet), GET_U_1(dp->dstNode)),
+		    ddpskt_string(ndo, GET_U_1(dp->dstSkt)));
+		bp += ddpSize;
+		length -= ddpSize;
+		hdrlen += ddpSize;
+		ddp_print(ndo, bp, length, GET_U_1(dp->type), snet,
+			  GET_U_1(dp->srcNode), GET_U_1(dp->srcSkt));
+		break;
+
+#ifdef notdef
+	case lapKLAP:
+		klap_print(bp, length);
+		break;
+#endif
+
+	default:
+		ND_PRINT("%u > %u at-lap#%u %u",
+		    GET_U_1(lp->src), GET_U_1(lp->dst), GET_U_1(lp->type),
+		    length);
+		break;
+	}
+	return (hdrlen);
+}
+
+/*
+ * Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
+ * when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
+ * packets in them).
+ */
+void
+atalk_print(netdissect_options *ndo,
+            const u_char *bp, u_int length)
+{
+	const struct atDDP *dp;
+	u_short snet;
+
+	ndo->ndo_protocol = "atalk";
+        if(!ndo->ndo_eflag)
+            ND_PRINT("AT ");
+
+	if (length < ddpSize) {
+		ND_PRINT(" [|ddp %u]", length);
+		return;
+	}
+	if (!ND_TTEST_LEN(bp, ddpSize)) {
+		ND_PRINT(" [|ddp]");
+		return;
+	}
+	dp = (const struct atDDP *)bp;
+	snet = GET_BE_U_2(dp->srcNet);
+	ND_PRINT("%s.%s", ataddr_string(ndo, snet, GET_U_1(dp->srcNode)),
+		 ddpskt_string(ndo, GET_U_1(dp->srcSkt)));
+	ND_PRINT(" > %s.%s: ",
+	       ataddr_string(ndo, GET_BE_U_2(dp->dstNet), GET_U_1(dp->dstNode)),
+	       ddpskt_string(ndo, GET_U_1(dp->dstSkt)));
+	bp += ddpSize;
+	length -= ddpSize;
+	ddp_print(ndo, bp, length, GET_U_1(dp->type), snet,
+		  GET_U_1(dp->srcNode), GET_U_1(dp->srcSkt));
+}
+
+/* XXX should probably pass in the snap header and do checks like arp_print() */
+void
+aarp_print(netdissect_options *ndo,
+           const u_char *bp, u_int length)
+{
+	const struct aarp *ap;
+
+#define AT(member) ataddr_string(ndo, (ap->member[1]<<8)|ap->member[2],ap->member[3])
+
+	ndo->ndo_protocol = "aarp";
+	ND_PRINT("aarp ");
+	ap = (const struct aarp *)bp;
+	if (!ND_TTEST_SIZE(ap)) {
+		/* Just bail if we don't have the whole chunk. */
+		nd_print_trunc(ndo);
+		return;
+	}
+	if (length < sizeof(*ap)) {
+		ND_PRINT(" [|aarp %u]", length);
+		return;
+	}
+	if (GET_BE_U_2(ap->htype) == 1 &&
+	    GET_BE_U_2(ap->ptype) == ETHERTYPE_ATALK &&
+	    GET_U_1(ap->halen) == MAC_ADDR_LEN && GET_U_1(ap->palen) == 4)
+		switch (GET_BE_U_2(ap->op)) {
+
+		case 1:				/* request */
+			ND_PRINT("who-has %s tell %s", AT(pdaddr), AT(psaddr));
+			return;
+
+		case 2:				/* response */
+			ND_PRINT("reply %s is-at %s", AT(psaddr), GET_ETHERADDR_STRING(ap->hsaddr));
+			return;
+
+		case 3:				/* probe (oy!) */
+			ND_PRINT("probe %s tell %s", AT(pdaddr), AT(psaddr));
+			return;
+		}
+	ND_PRINT("len %u op %u htype %u ptype %#x halen %u palen %u",
+	    length, GET_BE_U_2(ap->op), GET_BE_U_2(ap->htype),
+	    GET_BE_U_2(ap->ptype), GET_U_1(ap->halen), GET_U_1(ap->palen));
+}
+
+/*
+ * Print AppleTalk Datagram Delivery Protocol packets.
+ */
+static void
+ddp_print(netdissect_options *ndo,
+          const u_char *bp, u_int length, u_int t,
+          u_short snet, u_char snode, u_char skt)
+{
+
+	switch (t) {
+
+	case ddpNBP:
+		nbp_print(ndo, (const struct atNBP *)bp, length, snet, snode, skt);
+		break;
+
+	case ddpATP:
+		atp_print(ndo, (const struct atATP *)bp, length);
+		break;
+
+	case ddpEIGRP:
+		eigrp_print(ndo, bp, length);
+		break;
+
+	default:
+		ND_PRINT(" at-%s %u", tok2str(type2str, NULL, t), length);
+		break;
+	}
+}
+
+static void
+atp_print(netdissect_options *ndo,
+          const struct atATP *ap, u_int length)
+{
+	uint8_t control;
+	uint32_t data;
+
+	if ((const u_char *)(ap + 1) > ndo->ndo_snapend) {
+		/* Just bail if we don't have the whole chunk. */
+		nd_print_trunc(ndo);
+		return;
+	}
+	if (length < sizeof(*ap)) {
+		ND_PRINT(" [|atp %u]", length);
+		return;
+	}
+	length -= sizeof(*ap);
+	control = GET_U_1(ap->control);
+	switch (control & 0xc0) {
+
+	case atpReqCode:
+		ND_PRINT(" atp-req%s %u",
+			     control & atpXO? " " : "*",
+			     GET_BE_U_2(ap->transID));
+
+		atp_bitmap_print(ndo, GET_U_1(ap->bitmap));
+
+		if (length != 0)
+			ND_PRINT(" [len=%u]", length);
+
+		switch (control & (atpEOM|atpSTS)) {
+		case atpEOM:
+			ND_PRINT(" [EOM]");
+			break;
+		case atpSTS:
+			ND_PRINT(" [STS]");
+			break;
+		case atpEOM|atpSTS:
+			ND_PRINT(" [EOM,STS]");
+			break;
+		}
+		break;
+
+	case atpRspCode:
+		ND_PRINT(" atp-resp%s%u:%u (%u)",
+			     control & atpEOM? "*" : " ",
+			     GET_BE_U_2(ap->transID), GET_U_1(ap->bitmap),
+			     length);
+		switch (control & (atpXO|atpSTS)) {
+		case atpXO:
+			ND_PRINT(" [XO]");
+			break;
+		case atpSTS:
+			ND_PRINT(" [STS]");
+			break;
+		case atpXO|atpSTS:
+			ND_PRINT(" [XO,STS]");
+			break;
+		}
+		break;
+
+	case atpRelCode:
+		ND_PRINT(" atp-rel  %u", GET_BE_U_2(ap->transID));
+
+		atp_bitmap_print(ndo, GET_U_1(ap->bitmap));
+
+		/* length should be zero */
+		if (length)
+			ND_PRINT(" [len=%u]", length);
+
+		/* there shouldn't be any control flags */
+		if (control & (atpXO|atpEOM|atpSTS)) {
+			char c = '[';
+			if (control & atpXO) {
+				ND_PRINT("%cXO", c);
+				c = ',';
+			}
+			if (control & atpEOM) {
+				ND_PRINT("%cEOM", c);
+				c = ',';
+			}
+			if (control & atpSTS) {
+				ND_PRINT("%cSTS", c);
+			}
+			ND_PRINT("]");
+		}
+		break;
+
+	default:
+		ND_PRINT(" atp-0x%x  %u (%u)", control,
+			     GET_BE_U_2(ap->transID), length);
+		break;
+	}
+	data = GET_BE_U_4(ap->userData);
+	if (data != 0)
+		ND_PRINT(" 0x%x", data);
+}
+
+static void
+atp_bitmap_print(netdissect_options *ndo,
+                 u_char bm)
+{
+	u_int i;
+
+	/*
+	 * The '& 0xff' below is needed for compilers that want to sign
+	 * extend a u_char, which is the case with the Ultrix compiler.
+	 * (gcc is smart enough to eliminate it, at least on the Sparc).
+	 */
+	if ((bm + 1) & (bm & 0xff)) {
+		char c = '<';
+		for (i = 0; bm; ++i) {
+			if (bm & 1) {
+				ND_PRINT("%c%u", c, i);
+				c = ',';
+			}
+			bm >>= 1;
+		}
+		ND_PRINT(">");
+	} else {
+		for (i = 0; bm; ++i)
+			bm >>= 1;
+		if (i > 1)
+			ND_PRINT("<0-%u>", i - 1);
+		else
+			ND_PRINT("<0>");
+	}
+}
+
+static void
+nbp_print(netdissect_options *ndo,
+          const struct atNBP *np, u_int length, u_short snet,
+          u_char snode, u_char skt)
+{
+	const struct atNBPtuple *tp =
+		(const struct atNBPtuple *)((const u_char *)np + nbpHeaderSize);
+	uint8_t control;
+	u_int i;
+	const u_char *ep;
+
+	if (length < nbpHeaderSize) {
+		ND_PRINT(" truncated-nbp %u", length);
+		return;
+	}
+
+	length -= nbpHeaderSize;
+	if (length < 8) {
+		/* must be room for at least one tuple */
+		ND_PRINT(" truncated-nbp %u", length + nbpHeaderSize);
+		return;
+	}
+	/* ep points to end of available data */
+	ep = ndo->ndo_snapend;
+	if ((const u_char *)tp > ep) {
+		nd_print_trunc(ndo);
+		return;
+	}
+	control = GET_U_1(np->control);
+	switch (i = (control & 0xf0)) {
+
+	case nbpBrRq:
+	case nbpLkUp:
+		ND_PRINT(i == nbpLkUp? " nbp-lkup %u:":" nbp-brRq %u:",
+			 GET_U_1(np->id));
+		if ((const u_char *)(tp + 1) > ep) {
+			nd_print_trunc(ndo);
+			return;
+		}
+		(void)nbp_name_print(ndo, tp, ep);
+		/*
+		 * look for anomalies: the spec says there can only
+		 * be one tuple, the address must match the source
+		 * address and the enumerator should be zero.
+		 */
+		if ((control & 0xf) != 1)
+			ND_PRINT(" [ntup=%u]", control & 0xf);
+		if (GET_U_1(tp->enumerator))
+			ND_PRINT(" [enum=%u]", GET_U_1(tp->enumerator));
+		if (GET_BE_U_2(tp->net) != snet ||
+		    GET_U_1(tp->node) != snode ||
+		    GET_U_1(tp->skt) != skt)
+			ND_PRINT(" [addr=%s.%u]",
+			    ataddr_string(ndo, GET_BE_U_2(tp->net),
+					  GET_U_1(tp->node)),
+			    GET_U_1(tp->skt));
+		break;
+
+	case nbpLkUpReply:
+		ND_PRINT(" nbp-reply %u:", GET_U_1(np->id));
+
+		/* print each of the tuples in the reply */
+		for (i = control & 0xf; i != 0 && tp; i--)
+			tp = nbp_tuple_print(ndo, tp, ep, snet, snode, skt);
+		break;
+
+	default:
+		ND_PRINT(" nbp-0x%x  %u (%u)", control, GET_U_1(np->id),
+			 length);
+		break;
+	}
+}
+
+/* print a counted string */
+static const u_char *
+print_cstring(netdissect_options *ndo,
+              const u_char *cp, const u_char *ep)
+{
+	u_int length;
+
+	if (cp >= ep) {
+		nd_print_trunc(ndo);
+		return (0);
+	}
+	length = GET_U_1(cp);
+	cp++;
+
+	/* Spec says string can be at most 32 bytes long */
+	if (length > 32) {
+		ND_PRINT("[len=%u]", length);
+		return (0);
+	}
+	while (length != 0) {
+		if (cp >= ep) {
+			nd_print_trunc(ndo);
+			return (0);
+		}
+		fn_print_char(ndo, GET_U_1(cp));
+		cp++;
+		length--;
+	}
+	return (cp);
+}
+
+static const struct atNBPtuple *
+nbp_tuple_print(netdissect_options *ndo,
+                const struct atNBPtuple *tp, const u_char *ep,
+                u_short snet, u_char snode, u_char skt)
+{
+	const struct atNBPtuple *tpn;
+
+	if ((const u_char *)(tp + 1) > ep) {
+		nd_print_trunc(ndo);
+		return 0;
+	}
+	tpn = nbp_name_print(ndo, tp, ep);
+
+	/* if the enumerator isn't 1, print it */
+	if (GET_U_1(tp->enumerator) != 1)
+		ND_PRINT("(%u)", GET_U_1(tp->enumerator));
+
+	/* if the socket doesn't match the src socket, print it */
+	if (GET_U_1(tp->skt) != skt)
+		ND_PRINT(" %u", GET_U_1(tp->skt));
+
+	/* if the address doesn't match the src address, it's an anomaly */
+	if (GET_BE_U_2(tp->net) != snet ||
+	    GET_U_1(tp->node) != snode)
+		ND_PRINT(" [addr=%s]",
+		    ataddr_string(ndo, GET_BE_U_2(tp->net), GET_U_1(tp->node)));
+
+	return (tpn);
+}
+
+static const struct atNBPtuple *
+nbp_name_print(netdissect_options *ndo,
+               const struct atNBPtuple *tp, const u_char *ep)
+{
+	const u_char *cp = (const u_char *)tp + nbpTupleSize;
+
+	ND_PRINT(" ");
+
+	/* Object */
+	ND_PRINT("\"");
+	if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
+		/* Type */
+		ND_PRINT(":");
+		if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
+			/* Zone */
+			ND_PRINT("@");
+			if ((cp = print_cstring(ndo, cp, ep)) != NULL)
+				ND_PRINT("\"");
+		}
+	}
+	return ((const struct atNBPtuple *)cp);
+}
+
+
+#define HASHNAMESIZE 4096
+
+struct hnamemem {
+	u_int addr;
+	char *name;
+	struct hnamemem *nxt;
+};
+
+static struct hnamemem hnametable[HASHNAMESIZE];
+
+static const char *
+ataddr_string(netdissect_options *ndo,
+              u_short atnet, u_char athost)
+{
+	struct hnamemem *tp, *tp2;
+	u_int i = (atnet << 8) | athost;
+	char nambuf[256+1];
+	static int first = 1;
+	FILE *fp;
+
+	/*
+	 * Are we doing address to name resolution?
+	 */
+	if (!ndo->ndo_nflag) {
+		/*
+		 * Yes.  Have we tried to open and read an AppleTalk
+		 * number to name map file?
+		 */
+		if (!first) {
+			/*
+			 * No; try to do so.
+			 */
+			first = 0;
+			fp = fopen("/etc/atalk.names", "r");
+			if (fp != NULL) {
+				char line[256];
+				u_int i1, i2;
+
+				while (fgets(line, sizeof(line), fp)) {
+					if (line[0] == '\n' || line[0] == 0 ||
+					    line[0] == '#')
+						continue;
+					if (sscanf(line, "%u.%u %256s", &i1,
+					    &i2, nambuf) == 3)
+						/* got a hostname. */
+						i2 |= (i1 << 8);
+					else if (sscanf(line, "%u %256s", &i1,
+					    nambuf) == 2)
+						/* got a net name */
+						i2 = (i1 << 8) | 255;
+					else
+						continue;
+
+					for (tp = &hnametable[i2 & (HASHNAMESIZE-1)];
+					     tp->nxt; tp = tp->nxt)
+						;
+					tp->addr = i2;
+					tp->nxt = newhnamemem(ndo);
+					tp->name = strdup(nambuf);
+					if (tp->name == NULL)
+						(*ndo->ndo_error)(ndo,
+						    S_ERR_ND_MEM_ALLOC,
+						    "%s: strdup(nambuf)", __func__);
+				}
+				fclose(fp);
+			}
+		}
+	}
+
+	/*
+	 * Now try to look up the address in the table.
+	 */
+	for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
+		if (tp->addr == i)
+			return (tp->name);
+
+	/* didn't have the node name -- see if we've got the net name */
+	i |= 255;
+	for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
+		if (tp2->addr == i) {
+			tp->addr = (atnet << 8) | athost;
+			tp->nxt = newhnamemem(ndo);
+			(void)snprintf(nambuf, sizeof(nambuf), "%s.%u",
+			    tp2->name, athost);
+			tp->name = strdup(nambuf);
+			if (tp->name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(nambuf)", __func__);
+			return (tp->name);
+		}
+
+	tp->addr = (atnet << 8) | athost;
+	tp->nxt = newhnamemem(ndo);
+	if (athost != 255)
+		(void)snprintf(nambuf, sizeof(nambuf), "%u.%u", atnet, athost);
+	else
+		(void)snprintf(nambuf, sizeof(nambuf), "%u", atnet);
+	tp->name = strdup(nambuf);
+	if (tp->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(nambuf)", __func__);
+
+	return (tp->name);
+}
+
+static const struct tok skt2str[] = {
+	{ rtmpSkt,	"rtmp" },	/* routing table maintenance */
+	{ nbpSkt,	"nis" },	/* name info socket */
+	{ echoSkt,	"echo" },	/* AppleTalk echo protocol */
+	{ zipSkt,	"zip" },	/* zone info protocol */
+	{ 0,		NULL }
+};
+
+static const char *
+ddpskt_string(netdissect_options *ndo,
+              u_int skt)
+{
+	static char buf[8];
+
+	if (ndo->ndo_nflag) {
+		(void)snprintf(buf, sizeof(buf), "%u", skt);
+		return (buf);
+	}
+	return (tok2str(skt2str, "%u", skt));
+}