Adding upstream version 4.99.4.upstream/4.99.4upstream

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

1 files changed, 1330 insertions, 0 deletions

diff --git a/addrtoname.c b/addrtoname.c
new file mode 100644
index 0000000..914665c
--- /dev/null
+++ b/addrtoname.c
@@ -0,0 +1,1330 @@
+/*
+ * Copyright (c) 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.
+ *
+ *  Internet, ethernet, port, and protocol string to address
+ *  and address to string conversion routines
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_CASPER
+#include <libcasper.h>
+#include <casper/cap_dns.h>
+#endif /* HAVE_CASPER */
+
+#include "netdissect-stdinc.h"
+
+#ifdef USE_ETHER_NTOHOST
+  #if defined(NET_ETHERNET_H_DECLARES_ETHER_NTOHOST)
+    /*
+     * OK, just include <net/ethernet.h>.
+     */
+    #include <net/ethernet.h>
+  #elif defined(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST)
+    /*
+     * OK, just include <netinet/ether.h>
+     */
+    #include <netinet/ether.h>
+  #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_NTOHOST)
+    /*
+     * OK, just include <sys/ethernet.h>
+     */
+    #include <sys/ethernet.h>
+  #elif defined(ARPA_INET_H_DECLARES_ETHER_NTOHOST)
+    /*
+     * OK, just include <arpa/inet.h>
+     */
+    #include <arpa/inet.h>
+  #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST)
+    /*
+     * OK, include <netinet/if_ether.h>, after all the other stuff we
+     * need to include or define for its benefit.
+     */
+    #define NEED_NETINET_IF_ETHER_H
+  #else
+    /*
+     * We'll have to declare it ourselves.
+     * If <netinet/if_ether.h> defines struct ether_addr, include
+     * it.  Otherwise, define it ourselves.
+     */
+    #ifdef HAVE_STRUCT_ETHER_ADDR
+      #define NEED_NETINET_IF_ETHER_H
+    #else /* HAVE_STRUCT_ETHER_ADDR */
+	struct ether_addr {
+		/* Beware FreeBSD calls this "octet". */
+		unsigned char ether_addr_octet[MAC_ADDR_LEN];
+	};
+    #endif /* HAVE_STRUCT_ETHER_ADDR */
+  #endif /* what declares ether_ntohost() */
+
+  #ifdef NEED_NETINET_IF_ETHER_H
+    /*
+     * Include diag-control.h before <net/if.h>, which too defines a macro
+     * named ND_UNREACHABLE.
+     */
+    #include "diag-control.h"
+    #include <net/if.h>		/* Needed on some platforms */
+    #include <netinet/in.h>	/* Needed on some platforms */
+    #include <netinet/if_ether.h>
+  #endif /* NEED_NETINET_IF_ETHER_H */
+
+  #ifndef HAVE_DECL_ETHER_NTOHOST
+    /*
+     * No header declares it, so declare it ourselves.
+     */
+    extern int ether_ntohost(char *, const struct ether_addr *);
+  #endif /* !defined(HAVE_DECL_ETHER_NTOHOST) */
+#endif /* USE_ETHER_NTOHOST */
+
+#include <pcap.h>
+#include <pcap-namedb.h>
+#ifndef HAVE_GETSERVENT
+#include <getservent.h>
+#endif
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "addrtostr.h"
+#include "ethertype.h"
+#include "llc.h"
+#include "extract.h"
+#include "oui.h"
+
+/*
+ * hash tables for whatever-to-name translations
+ *
+ * ndo_error() called on strdup(3) failure with S_ERR_ND_MEM_ALLOC status
+ */
+
+#define HASHNAMESIZE 4096
+
+struct hnamemem {
+	uint32_t addr;
+	const char *name;
+	struct hnamemem *nxt;
+};
+
+static struct hnamemem hnametable[HASHNAMESIZE];
+static struct hnamemem tporttable[HASHNAMESIZE];
+static struct hnamemem uporttable[HASHNAMESIZE];
+static struct hnamemem eprototable[HASHNAMESIZE];
+static struct hnamemem dnaddrtable[HASHNAMESIZE];
+static struct hnamemem ipxsaptable[HASHNAMESIZE];
+
+#ifdef _WIN32
+/*
+ * fake gethostbyaddr for Win2k/XP
+ * gethostbyaddr() returns incorrect value when AF_INET6 is passed
+ * to 3rd argument.
+ *
+ * h_name in struct hostent is only valid.
+ */
+static struct hostent *
+win32_gethostbyaddr(const char *addr, int len, int type)
+{
+	static struct hostent host;
+	static char hostbuf[NI_MAXHOST];
+	char hname[NI_MAXHOST];
+	struct sockaddr_in6 addr6;
+
+	host.h_name = hostbuf;
+	switch (type) {
+	case AF_INET:
+		return gethostbyaddr(addr, len, type);
+		break;
+	case AF_INET6:
+		memset(&addr6, 0, sizeof(addr6));
+		addr6.sin6_family = AF_INET6;
+		memcpy(&addr6.sin6_addr, addr, len);
+		if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
+		    hname, sizeof(hname), NULL, 0, 0)) {
+			return NULL;
+		} else {
+			strlcpy(host.h_name, hname, NI_MAXHOST);
+			return &host;
+		}
+		break;
+	default:
+		return NULL;
+	}
+}
+#define gethostbyaddr win32_gethostbyaddr
+#endif /* _WIN32 */
+
+struct h6namemem {
+	nd_ipv6 addr;
+	char *name;
+	struct h6namemem *nxt;
+};
+
+static struct h6namemem h6nametable[HASHNAMESIZE];
+
+struct enamemem {
+	u_short e_addr0;
+	u_short e_addr1;
+	u_short e_addr2;
+	const char *e_name;
+	u_char *e_nsap;			/* used only for nsaptable[] */
+	struct enamemem *e_nxt;
+};
+
+static struct enamemem enametable[HASHNAMESIZE];
+static struct enamemem nsaptable[HASHNAMESIZE];
+
+struct bsnamemem {
+	u_short bs_addr0;
+	u_short bs_addr1;
+	u_short bs_addr2;
+	const char *bs_name;
+	u_char *bs_bytes;
+	unsigned int bs_nbytes;
+	struct bsnamemem *bs_nxt;
+};
+
+static struct bsnamemem bytestringtable[HASHNAMESIZE];
+
+struct protoidmem {
+	uint32_t p_oui;
+	u_short p_proto;
+	const char *p_name;
+	struct protoidmem *p_nxt;
+};
+
+static struct protoidmem protoidtable[HASHNAMESIZE];
+
+/*
+ * A faster replacement for inet_ntoa().
+ */
+const char *
+intoa(uint32_t addr)
+{
+	char *cp;
+	u_int byte;
+	int n;
+	static char buf[sizeof(".xxx.xxx.xxx.xxx")];
+
+	addr = ntohl(addr);
+	cp = buf + sizeof(buf);
+	*--cp = '\0';
+
+	n = 4;
+	do {
+		byte = addr & 0xff;
+		*--cp = (char)(byte % 10) + '0';
+		byte /= 10;
+		if (byte > 0) {
+			*--cp = (char)(byte % 10) + '0';
+			byte /= 10;
+			if (byte > 0)
+				*--cp = (char)byte + '0';
+		}
+		*--cp = '.';
+		addr >>= 8;
+	} while (--n > 0);
+
+	return cp + 1;
+}
+
+static uint32_t f_netmask;
+static uint32_t f_localnet;
+#ifdef HAVE_CASPER
+cap_channel_t *capdns;
+#endif
+
+/*
+ * Return a name for the IP address pointed to by ap.  This address
+ * is assumed to be in network byte order.
+ *
+ * NOTE: ap is *NOT* necessarily part of the packet data, so you
+ * *CANNOT* use the ND_TCHECK_* or ND_TTEST_* macros on it.  Furthermore,
+ * even in cases where it *is* part of the packet data, the caller
+ * would still have to check for a null return value, even if it's
+ * just printing the return value with "%s" - not all versions of
+ * printf print "(null)" with "%s" and a null pointer, some of them
+ * don't check for a null pointer and crash in that case.
+ *
+ * The callers of this routine should, before handing this routine
+ * a pointer to packet data, be sure that the data is present in
+ * the packet buffer.  They should probably do those checks anyway,
+ * as other data at that layer might not be IP addresses, and it
+ * also needs to check whether they're present in the packet buffer.
+ */
+const char *
+ipaddr_string(netdissect_options *ndo, const u_char *ap)
+{
+	struct hostent *hp;
+	uint32_t addr;
+	struct hnamemem *p;
+
+	memcpy(&addr, ap, sizeof(addr));
+	p = &hnametable[addr & (HASHNAMESIZE-1)];
+	for (; p->nxt; p = p->nxt) {
+		if (p->addr == addr)
+			return (p->name);
+	}
+	p->addr = addr;
+	p->nxt = newhnamemem(ndo);
+
+	/*
+	 * Print names unless:
+	 *	(1) -n was given.
+	 *      (2) Address is foreign and -f was given. (If -f was not
+	 *	    given, f_netmask and f_localnet are 0 and the test
+	 *	    evaluates to true)
+	 */
+	if (!ndo->ndo_nflag &&
+	    (addr & f_netmask) == f_localnet) {
+#ifdef HAVE_CASPER
+		if (capdns != NULL) {
+			hp = cap_gethostbyaddr(capdns, (char *)&addr, 4,
+			    AF_INET);
+		} else
+#endif
+			hp = gethostbyaddr((char *)&addr, 4, AF_INET);
+		if (hp) {
+			char *dotp;
+
+			p->name = strdup(hp->h_name);
+			if (p->name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(hp->h_name)", __func__);
+			if (ndo->ndo_Nflag) {
+				/* Remove domain qualifications */
+				dotp = strchr(p->name, '.');
+				if (dotp)
+					*dotp = '\0';
+			}
+			return (p->name);
+		}
+	}
+	p->name = strdup(intoa(addr));
+	if (p->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(intoa(addr))", __func__);
+	return (p->name);
+}
+
+/*
+ * Return a name for the IP6 address pointed to by ap.  This address
+ * is assumed to be in network byte order.
+ */
+const char *
+ip6addr_string(netdissect_options *ndo, const u_char *ap)
+{
+	struct hostent *hp;
+	union {
+		nd_ipv6 addr;
+		struct for_hash_addr {
+			char fill[14];
+			uint16_t d;
+		} addra;
+	} addr;
+	struct h6namemem *p;
+	const char *cp;
+	char ntop_buf[INET6_ADDRSTRLEN];
+
+	memcpy(&addr, ap, sizeof(addr));
+	p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
+	for (; p->nxt; p = p->nxt) {
+		if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
+			return (p->name);
+	}
+	memcpy(p->addr, addr.addr, sizeof(nd_ipv6));
+	p->nxt = newh6namemem(ndo);
+
+	/*
+	 * Do not print names if -n was given.
+	 */
+	if (!ndo->ndo_nflag) {
+#ifdef HAVE_CASPER
+		if (capdns != NULL) {
+			hp = cap_gethostbyaddr(capdns, (char *)&addr,
+			    sizeof(addr), AF_INET6);
+		} else
+#endif
+			hp = gethostbyaddr((char *)&addr, sizeof(addr),
+			    AF_INET6);
+		if (hp) {
+			char *dotp;
+
+			p->name = strdup(hp->h_name);
+			if (p->name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(hp->h_name)", __func__);
+			if (ndo->ndo_Nflag) {
+				/* Remove domain qualifications */
+				dotp = strchr(p->name, '.');
+				if (dotp)
+					*dotp = '\0';
+			}
+			return (p->name);
+		}
+	}
+	cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
+	p->name = strdup(cp);
+	if (p->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(cp)", __func__);
+	return (p->name);
+}
+
+static const char hex[16] = {
+	'0', '1', '2', '3', '4', '5', '6', '7',
+	'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+};
+
+/*
+ * Convert an octet to two hex digits.
+ *
+ * Coverity appears either:
+ *
+ *    not to believe the C standard when it asserts that a uint8_t is
+ *    exactly 8 bits in size;
+ *
+ *    not to believe that an unsigned type of exactly 8 bits has a value
+ *    in the range of 0 to 255;
+ *
+ *    not to believe that, for a range of unsigned values, if you shift
+ *    one of those values right by 4 bits, the maximum result value is
+ *    the maximum value shifted right by 4 bits, with no stray 1's shifted
+ *    in;
+ *
+ *    not to believe that 255 >> 4 is 15;
+ *
+ * so it gets upset that we're taking a "tainted" unsigned value, shifting
+ * it right 4 bits, and using it as an index into a 16-element array.
+ *
+ * So we do a stupid pointless masking of the result of the shift with
+ * 0xf, to hammer the point home to Coverity.
+ */
+static inline char *
+octet_to_hex(char *cp, uint8_t octet)
+{
+	*cp++ = hex[(octet >> 4) & 0xf];
+	*cp++ = hex[(octet >> 0) & 0xf];
+	return (cp);
+}
+
+/* Find the hash node that corresponds the ether address 'ep' */
+
+static struct enamemem *
+lookup_emem(netdissect_options *ndo, const u_char *ep)
+{
+	u_int i, j, k;
+	struct enamemem *tp;
+
+	k = (ep[0] << 8) | ep[1];
+	j = (ep[2] << 8) | ep[3];
+	i = (ep[4] << 8) | ep[5];
+
+	tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
+	while (tp->e_nxt)
+		if (tp->e_addr0 == i &&
+		    tp->e_addr1 == j &&
+		    tp->e_addr2 == k)
+			return tp;
+		else
+			tp = tp->e_nxt;
+	tp->e_addr0 = (u_short)i;
+	tp->e_addr1 = (u_short)j;
+	tp->e_addr2 = (u_short)k;
+	tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
+	if (tp->e_nxt == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
+
+	return tp;
+}
+
+/*
+ * Find the hash node that corresponds to the bytestring 'bs'
+ * with length 'nlen'
+ */
+
+static struct bsnamemem *
+lookup_bytestring(netdissect_options *ndo, const u_char *bs,
+		  const unsigned int nlen)
+{
+	struct bsnamemem *tp;
+	u_int i, j, k;
+
+	if (nlen >= 6) {
+		k = (bs[0] << 8) | bs[1];
+		j = (bs[2] << 8) | bs[3];
+		i = (bs[4] << 8) | bs[5];
+	} else if (nlen >= 4) {
+		k = (bs[0] << 8) | bs[1];
+		j = (bs[2] << 8) | bs[3];
+		i = 0;
+	} else
+		i = j = k = 0;
+
+	tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
+	while (tp->bs_nxt)
+		if (nlen == tp->bs_nbytes &&
+		    tp->bs_addr0 == i &&
+		    tp->bs_addr1 == j &&
+		    tp->bs_addr2 == k &&
+		    memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0)
+			return tp;
+		else
+			tp = tp->bs_nxt;
+
+	tp->bs_addr0 = (u_short)i;
+	tp->bs_addr1 = (u_short)j;
+	tp->bs_addr2 = (u_short)k;
+
+	tp->bs_bytes = (u_char *) calloc(1, nlen);
+	if (tp->bs_bytes == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: calloc", __func__);
+
+	memcpy(tp->bs_bytes, bs, nlen);
+	tp->bs_nbytes = nlen;
+	tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp));
+	if (tp->bs_nxt == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: calloc", __func__);
+
+	return tp;
+}
+
+/* Find the hash node that corresponds the NSAP 'nsap' */
+
+static struct enamemem *
+lookup_nsap(netdissect_options *ndo, const u_char *nsap,
+	    u_int nsap_length)
+{
+	u_int i, j, k;
+	struct enamemem *tp;
+	const u_char *ensap;
+
+	if (nsap_length > 6) {
+		ensap = nsap + nsap_length - 6;
+		k = (ensap[0] << 8) | ensap[1];
+		j = (ensap[2] << 8) | ensap[3];
+		i = (ensap[4] << 8) | ensap[5];
+	}
+	else
+		i = j = k = 0;
+
+	tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
+	while (tp->e_nxt)
+		if (nsap_length == tp->e_nsap[0] &&
+		    tp->e_addr0 == i &&
+		    tp->e_addr1 == j &&
+		    tp->e_addr2 == k &&
+		    memcmp((const char *)nsap,
+			(char *)&(tp->e_nsap[1]), nsap_length) == 0)
+			return tp;
+		else
+			tp = tp->e_nxt;
+	tp->e_addr0 = (u_short)i;
+	tp->e_addr1 = (u_short)j;
+	tp->e_addr2 = (u_short)k;
+	tp->e_nsap = (u_char *)malloc(nsap_length + 1);
+	if (tp->e_nsap == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: malloc", __func__);
+	tp->e_nsap[0] = (u_char)nsap_length;	/* guaranteed < ISONSAP_MAX_LENGTH */
+	memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
+	tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
+	if (tp->e_nxt == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
+
+	return tp;
+}
+
+/* Find the hash node that corresponds the protoid 'pi'. */
+
+static struct protoidmem *
+lookup_protoid(netdissect_options *ndo, const u_char *pi)
+{
+	u_int i, j;
+	struct protoidmem *tp;
+
+	/* 5 octets won't be aligned */
+	i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
+	j =   (pi[3] << 8) + pi[4];
+	/* XXX should be endian-insensitive, but do big-endian testing  XXX */
+
+	tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
+	while (tp->p_nxt)
+		if (tp->p_oui == i && tp->p_proto == j)
+			return tp;
+		else
+			tp = tp->p_nxt;
+	tp->p_oui = i;
+	tp->p_proto = (u_short)j;
+	tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
+	if (tp->p_nxt == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
+
+	return tp;
+}
+
+const char *
+etheraddr_string(netdissect_options *ndo, const uint8_t *ep)
+{
+	int i;
+	char *cp;
+	struct enamemem *tp;
+	int oui;
+	char buf[BUFSIZE];
+
+	tp = lookup_emem(ndo, ep);
+	if (tp->e_name)
+		return (tp->e_name);
+#ifdef USE_ETHER_NTOHOST
+	if (!ndo->ndo_nflag) {
+		char buf2[BUFSIZE];
+		/*
+		 * This is a non-const copy of ep for ether_ntohost(), which
+		 * has its second argument non-const in OpenBSD. Also saves a
+		 * type cast.
+		 */
+		struct ether_addr ea;
+
+		memcpy (&ea, ep, MAC_ADDR_LEN);
+		if (ether_ntohost(buf2, &ea) == 0) {
+			tp->e_name = strdup(buf2);
+			if (tp->e_name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(buf2)", __func__);
+			return (tp->e_name);
+		}
+	}
+#endif
+	cp = buf;
+	oui = EXTRACT_BE_U_3(ep);
+	cp = octet_to_hex(cp, *ep++);
+	for (i = 5; --i >= 0;) {
+		*cp++ = ':';
+		cp = octet_to_hex(cp, *ep++);
+	}
+
+	if (!ndo->ndo_nflag) {
+		snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
+		    tok2str(oui_values, "Unknown", oui));
+	} else
+		*cp = '\0';
+	tp->e_name = strdup(buf);
+	if (tp->e_name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(buf)", __func__);
+	return (tp->e_name);
+}
+
+const char *
+le64addr_string(netdissect_options *ndo, const uint8_t *ep)
+{
+	const unsigned int len = 8;
+	u_int i;
+	char *cp;
+	struct bsnamemem *tp;
+	char buf[BUFSIZE];
+
+	tp = lookup_bytestring(ndo, ep, len);
+	if (tp->bs_name)
+		return (tp->bs_name);
+
+	cp = buf;
+	for (i = len; i > 0 ; --i) {
+		cp = octet_to_hex(cp, *(ep + i - 1));
+		*cp++ = ':';
+	}
+	cp --;
+
+	*cp = '\0';
+
+	tp->bs_name = strdup(buf);
+	if (tp->bs_name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(buf)", __func__);
+
+	return (tp->bs_name);
+}
+
+const char *
+linkaddr_string(netdissect_options *ndo, const uint8_t *ep,
+		const unsigned int type, const unsigned int len)
+{
+	u_int i;
+	char *cp;
+	struct bsnamemem *tp;
+
+	if (len == 0)
+		return ("<empty>");
+
+	if (type == LINKADDR_ETHER && len == MAC_ADDR_LEN)
+		return (etheraddr_string(ndo, ep));
+
+	if (type == LINKADDR_FRELAY)
+		return (q922_string(ndo, ep, len));
+
+	tp = lookup_bytestring(ndo, ep, len);
+	if (tp->bs_name)
+		return (tp->bs_name);
+
+	tp->bs_name = cp = (char *)malloc(len*3);
+	if (tp->bs_name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: malloc", __func__);
+	cp = octet_to_hex(cp, *ep++);
+	for (i = len-1; i > 0 ; --i) {
+		*cp++ = ':';
+		cp = octet_to_hex(cp, *ep++);
+	}
+	*cp = '\0';
+	return (tp->bs_name);
+}
+
+#define ISONSAP_MAX_LENGTH 20
+const char *
+isonsap_string(netdissect_options *ndo, const uint8_t *nsap,
+	       u_int nsap_length)
+{
+	u_int nsap_idx;
+	char *cp;
+	struct enamemem *tp;
+
+	if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
+		return ("isonsap_string: illegal length");
+
+	tp = lookup_nsap(ndo, nsap, nsap_length);
+	if (tp->e_name)
+		return tp->e_name;
+
+	tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
+	if (cp == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: malloc", __func__);
+
+	for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
+		cp = octet_to_hex(cp, *nsap++);
+		if (((nsap_idx & 1) == 0) &&
+		     (nsap_idx + 1 < nsap_length)) {
+			*cp++ = '.';
+		}
+	}
+	*cp = '\0';
+	return (tp->e_name);
+}
+
+const char *
+tcpport_string(netdissect_options *ndo, u_short port)
+{
+	struct hnamemem *tp;
+	uint32_t i = port;
+	char buf[sizeof("00000")];
+
+	for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
+		if (tp->addr == i)
+			return (tp->name);
+
+	tp->addr = i;
+	tp->nxt = newhnamemem(ndo);
+
+	(void)snprintf(buf, sizeof(buf), "%u", i);
+	tp->name = strdup(buf);
+	if (tp->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(buf)", __func__);
+	return (tp->name);
+}
+
+const char *
+udpport_string(netdissect_options *ndo, u_short port)
+{
+	struct hnamemem *tp;
+	uint32_t i = port;
+	char buf[sizeof("00000")];
+
+	for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
+		if (tp->addr == i)
+			return (tp->name);
+
+	tp->addr = i;
+	tp->nxt = newhnamemem(ndo);
+
+	(void)snprintf(buf, sizeof(buf), "%u", i);
+	tp->name = strdup(buf);
+	if (tp->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(buf)", __func__);
+	return (tp->name);
+}
+
+const char *
+ipxsap_string(netdissect_options *ndo, u_short port)
+{
+	char *cp;
+	struct hnamemem *tp;
+	uint32_t i = port;
+	char buf[sizeof("0000")];
+
+	for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
+		if (tp->addr == i)
+			return (tp->name);
+
+	tp->addr = i;
+	tp->nxt = newhnamemem(ndo);
+
+	cp = buf;
+	port = ntohs(port);
+	*cp++ = hex[port >> 12 & 0xf];
+	*cp++ = hex[port >> 8 & 0xf];
+	*cp++ = hex[port >> 4 & 0xf];
+	*cp++ = hex[port & 0xf];
+	*cp++ = '\0';
+	tp->name = strdup(buf);
+	if (tp->name == NULL)
+		(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				  "%s: strdup(buf)", __func__);
+	return (tp->name);
+}
+
+static void
+init_servarray(netdissect_options *ndo)
+{
+	struct servent *sv;
+	struct hnamemem *table;
+	int i;
+	char buf[sizeof("0000000000")];
+
+	while ((sv = getservent()) != NULL) {
+		int port = ntohs(sv->s_port);
+		i = port & (HASHNAMESIZE-1);
+		if (strcmp(sv->s_proto, "tcp") == 0)
+			table = &tporttable[i];
+		else if (strcmp(sv->s_proto, "udp") == 0)
+			table = &uporttable[i];
+		else
+			continue;
+
+		while (table->name)
+			table = table->nxt;
+		if (ndo->ndo_nflag) {
+			(void)snprintf(buf, sizeof(buf), "%d", port);
+			table->name = strdup(buf);
+		} else
+			table->name = strdup(sv->s_name);
+		if (table->name == NULL)
+			(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					  "%s: strdup", __func__);
+
+		table->addr = port;
+		table->nxt = newhnamemem(ndo);
+	}
+	endservent();
+}
+
+static const struct eproto {
+	const char *s;
+	u_short p;
+} eproto_db[] = {
+	{ "aarp", ETHERTYPE_AARP },
+	{ "arp", ETHERTYPE_ARP },
+	{ "atalk", ETHERTYPE_ATALK },
+	{ "decnet", ETHERTYPE_DN },
+	{ "ip", ETHERTYPE_IP },
+	{ "ip6", ETHERTYPE_IPV6 },
+	{ "lat", ETHERTYPE_LAT },
+	{ "loopback", ETHERTYPE_LOOPBACK },
+	{ "mopdl", ETHERTYPE_MOPDL },
+	{ "moprc", ETHERTYPE_MOPRC },
+	{ "rarp", ETHERTYPE_REVARP },
+	{ "sca", ETHERTYPE_SCA },
+	{ (char *)0, 0 }
+};
+
+static void
+init_eprotoarray(netdissect_options *ndo)
+{
+	int i;
+	struct hnamemem *table;
+
+	for (i = 0; eproto_db[i].s; i++) {
+		int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
+		table = &eprototable[j];
+		while (table->name)
+			table = table->nxt;
+		table->name = eproto_db[i].s;
+		table->addr = htons(eproto_db[i].p);
+		table->nxt = newhnamemem(ndo);
+	}
+}
+
+static const struct protoidlist {
+	const u_char protoid[5];
+	const char *name;
+} protoidlist[] = {
+	{{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
+	{{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
+	{{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
+	{{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
+	{{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
+	{{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
+};
+
+/*
+ * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
+ * types.
+ */
+static void
+init_protoidarray(netdissect_options *ndo)
+{
+	int i;
+	struct protoidmem *tp;
+	const struct protoidlist *pl;
+	u_char protoid[5];
+
+	protoid[0] = 0;
+	protoid[1] = 0;
+	protoid[2] = 0;
+	for (i = 0; eproto_db[i].s; i++) {
+		u_short etype = htons(eproto_db[i].p);
+
+		memcpy((char *)&protoid[3], (char *)&etype, 2);
+		tp = lookup_protoid(ndo, protoid);
+		tp->p_name = strdup(eproto_db[i].s);
+		if (tp->p_name == NULL)
+			(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+				"%s: strdup(eproto_db[i].s)", __func__);
+	}
+	/* Hardwire some SNAP proto ID names */
+	for (pl = protoidlist; pl->name != NULL; ++pl) {
+		tp = lookup_protoid(ndo, pl->protoid);
+		/* Don't override existing name */
+		if (tp->p_name != NULL)
+			continue;
+
+		tp->p_name = pl->name;
+	}
+}
+
+static const struct etherlist {
+	const nd_mac_addr addr;
+	const char *name;
+} etherlist[] = {
+	{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
+	{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
+};
+
+/*
+ * Initialize the ethers hash table.  We take two different approaches
+ * depending on whether or not the system provides the ethers name
+ * service.  If it does, we just wire in a few names at startup,
+ * and etheraddr_string() fills in the table on demand.  If it doesn't,
+ * then we suck in the entire /etc/ethers file at startup.  The idea
+ * is that parsing the local file will be fast, but spinning through
+ * all the ethers entries via NIS & next_etherent might be very slow.
+ *
+ * XXX pcap_next_etherent doesn't belong in the pcap interface, but
+ * since the pcap module already does name-to-address translation,
+ * it's already does most of the work for the ethernet address-to-name
+ * translation, so we just pcap_next_etherent as a convenience.
+ */
+static void
+init_etherarray(netdissect_options *ndo)
+{
+	const struct etherlist *el;
+	struct enamemem *tp;
+#ifdef USE_ETHER_NTOHOST
+	char name[256];
+#else
+	struct pcap_etherent *ep;
+	FILE *fp;
+
+	/* Suck in entire ethers file */
+	fp = fopen(PCAP_ETHERS_FILE, "r");
+	if (fp != NULL) {
+		while ((ep = pcap_next_etherent(fp)) != NULL) {
+			tp = lookup_emem(ndo, ep->addr);
+			tp->e_name = strdup(ep->name);
+			if (tp->e_name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(ep->addr)", __func__);
+		}
+		(void)fclose(fp);
+	}
+#endif
+
+	/* Hardwire some ethernet names */
+	for (el = etherlist; el->name != NULL; ++el) {
+		tp = lookup_emem(ndo, el->addr);
+		/* Don't override existing name */
+		if (tp->e_name != NULL)
+			continue;
+
+#ifdef USE_ETHER_NTOHOST
+		/*
+		 * Use YP/NIS version of name if available.
+		 */
+		/* Same workaround as in etheraddr_string(). */
+		struct ether_addr ea;
+		memcpy (&ea, el->addr, MAC_ADDR_LEN);
+		if (ether_ntohost(name, &ea) == 0) {
+			tp->e_name = strdup(name);
+			if (tp->e_name == NULL)
+				(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					"%s: strdup(name)", __func__);
+			continue;
+		}
+#endif
+		tp->e_name = el->name;
+	}
+}
+
+static const struct ipxsap_ent {
+	uint16_t	v;
+	const char	*s;
+} ipxsap_db[] = {
+	{ 0x0000, "Unknown" },
+	{ 0x0001, "User" },
+	{ 0x0002, "User Group" },
+	{ 0x0003, "PrintQueue" },
+	{ 0x0004, "FileServer" },
+	{ 0x0005, "JobServer" },
+	{ 0x0006, "Gateway" },
+	{ 0x0007, "PrintServer" },
+	{ 0x0008, "ArchiveQueue" },
+	{ 0x0009, "ArchiveServer" },
+	{ 0x000a, "JobQueue" },
+	{ 0x000b, "Administration" },
+	{ 0x000F, "Novell TI-RPC" },
+	{ 0x0017, "Diagnostics" },
+	{ 0x0020, "NetBIOS" },
+	{ 0x0021, "NAS SNA Gateway" },
+	{ 0x0023, "NACS AsyncGateway" },
+	{ 0x0024, "RemoteBridge/RoutingService" },
+	{ 0x0026, "BridgeServer" },
+	{ 0x0027, "TCP/IP Gateway" },
+	{ 0x0028, "Point-to-point X.25 BridgeServer" },
+	{ 0x0029, "3270 Gateway" },
+	{ 0x002a, "CHI Corp" },
+	{ 0x002c, "PC Chalkboard" },
+	{ 0x002d, "TimeSynchServer" },
+	{ 0x002e, "ARCserve5.0/PalindromeBackup" },
+	{ 0x0045, "DI3270 Gateway" },
+	{ 0x0047, "AdvertisingPrintServer" },
+	{ 0x004a, "NetBlazerModems" },
+	{ 0x004b, "BtrieveVAP" },
+	{ 0x004c, "NetwareSQL" },
+	{ 0x004d, "XtreeNetwork" },
+	{ 0x0050, "BtrieveVAP4.11" },
+	{ 0x0052, "QuickLink" },
+	{ 0x0053, "PrintQueueUser" },
+	{ 0x0058, "Multipoint X.25 Router" },
+	{ 0x0060, "STLB/NLM" },
+	{ 0x0064, "ARCserve" },
+	{ 0x0066, "ARCserve3.0" },
+	{ 0x0072, "WAN CopyUtility" },
+	{ 0x007a, "TES-NetwareVMS" },
+	{ 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
+	{ 0x0095, "DDA OBGYN" },
+	{ 0x0098, "NetwareAccessServer" },
+	{ 0x009a, "Netware for VMS II/NamedPipeServer" },
+	{ 0x009b, "NetwareAccessServer" },
+	{ 0x009e, "PortableNetwareServer/SunLinkNVT" },
+	{ 0x00a1, "PowerchuteAPC UPS" },
+	{ 0x00aa, "LAWserve" },
+	{ 0x00ac, "CompaqIDA StatusMonitor" },
+	{ 0x0100, "PIPE STAIL" },
+	{ 0x0102, "LAN ProtectBindery" },
+	{ 0x0103, "OracleDataBaseServer" },
+	{ 0x0107, "Netware386/RSPX RemoteConsole" },
+	{ 0x010f, "NovellSNA Gateway" },
+	{ 0x0111, "TestServer" },
+	{ 0x0112, "HP PrintServer" },
+	{ 0x0114, "CSA MUX" },
+	{ 0x0115, "CSA LCA" },
+	{ 0x0116, "CSA CM" },
+	{ 0x0117, "CSA SMA" },
+	{ 0x0118, "CSA DBA" },
+	{ 0x0119, "CSA NMA" },
+	{ 0x011a, "CSA SSA" },
+	{ 0x011b, "CSA STATUS" },
+	{ 0x011e, "CSA APPC" },
+	{ 0x0126, "SNA TEST SSA Profile" },
+	{ 0x012a, "CSA TRACE" },
+	{ 0x012b, "NetwareSAA" },
+	{ 0x012e, "IKARUS VirusScan" },
+	{ 0x0130, "CommunicationsExecutive" },
+	{ 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
+	{ 0x0135, "NetwareNamingServicesProfile" },
+	{ 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
+	{ 0x0141, "LAN SpoolServer" },
+	{ 0x0152, "IRMALAN Gateway" },
+	{ 0x0154, "NamedPipeServer" },
+	{ 0x0166, "NetWareManagement" },
+	{ 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
+	{ 0x0173, "Compaq" },
+	{ 0x0174, "Compaq SNMP Agent" },
+	{ 0x0175, "Compaq" },
+	{ 0x0180, "XTreeServer/XTreeTools" },
+	{ 0x018A, "NASI ServicesBroadcastServer" },
+	{ 0x01b0, "GARP Gateway" },
+	{ 0x01b1, "Binfview" },
+	{ 0x01bf, "IntelLanDeskManager" },
+	{ 0x01ca, "AXTEC" },
+	{ 0x01cb, "ShivaNetModem/E" },
+	{ 0x01cc, "ShivaLanRover/E" },
+	{ 0x01cd, "ShivaLanRover/T" },
+	{ 0x01ce, "ShivaUniversal" },
+	{ 0x01d8, "CastelleFAXPressServer" },
+	{ 0x01da, "CastelleLANPressPrintServer" },
+	{ 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
+	{ 0x01f0, "LEGATO" },
+	{ 0x01f5, "LEGATO" },
+	{ 0x0233, "NMS Agent/NetwareManagementAgent" },
+	{ 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
+	{ 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
+	{ 0x023a, "LANtern" },
+	{ 0x023c, "MAVERICK" },
+	{ 0x023f, "NovellSMDR" },
+	{ 0x024e, "NetwareConnect" },
+	{ 0x024f, "NASI ServerBroadcast Cisco" },
+	{ 0x026a, "NMS ServiceConsole" },
+	{ 0x026b, "TimeSynchronizationServer Netware 4.x" },
+	{ 0x0278, "DirectoryServer Netware 4.x" },
+	{ 0x027b, "NetwareManagementAgent" },
+	{ 0x0280, "Novell File and Printer Sharing Service for PC" },
+	{ 0x0304, "NovellSAA Gateway" },
+	{ 0x0308, "COM/VERMED" },
+	{ 0x030a, "GalacticommWorldgroupServer" },
+	{ 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
+	{ 0x0320, "AttachmateGateway" },
+	{ 0x0327, "MicrosoftDiagnostiocs" },
+	{ 0x0328, "WATCOM SQL Server" },
+	{ 0x0335, "MultiTechSystems MultisynchCommServer" },
+	{ 0x0343, "Xylogics RemoteAccessServer/LANModem" },
+	{ 0x0355, "ArcadaBackupExec" },
+	{ 0x0358, "MSLCD1" },
+	{ 0x0361, "NETINELO" },
+	{ 0x037e, "Powerchute UPS Monitoring" },
+	{ 0x037f, "ViruSafeNotify" },
+	{ 0x0386, "HP Bridge" },
+	{ 0x0387, "HP Hub" },
+	{ 0x0394, "NetWare SAA Gateway" },
+	{ 0x039b, "LotusNotes" },
+	{ 0x03b7, "CertusAntiVirus" },
+	{ 0x03c4, "ARCserve4.0" },
+	{ 0x03c7, "LANspool3.5" },
+	{ 0x03d7, "LexmarkPrinterServer" },
+	{ 0x03d8, "LexmarkXLE PrinterServer" },
+	{ 0x03dd, "BanyanENS NetwareClient" },
+	{ 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
+	{ 0x03e1, "UnivelUnixware" },
+	{ 0x03e4, "UnivelUnixware" },
+	{ 0x03fc, "IntelNetport" },
+	{ 0x03fd, "PrintServerQueue" },
+	{ 0x040A, "ipnServer" },
+	{ 0x040D, "LVERRMAN" },
+	{ 0x040E, "LVLIC" },
+	{ 0x0414, "NET Silicon (DPI)/Kyocera" },
+	{ 0x0429, "SiteLockVirus" },
+	{ 0x0432, "UFHELPR???" },
+	{ 0x0433, "Synoptics281xAdvancedSNMPAgent" },
+	{ 0x0444, "MicrosoftNT SNA Server" },
+	{ 0x0448, "Oracle" },
+	{ 0x044c, "ARCserve5.01" },
+	{ 0x0457, "CanonGP55" },
+	{ 0x045a, "QMS Printers" },
+	{ 0x045b, "DellSCSI Array" },
+	{ 0x0491, "NetBlazerModems" },
+	{ 0x04ac, "OnTimeScheduler" },
+	{ 0x04b0, "CD-Net" },
+	{ 0x0513, "EmulexNQA" },
+	{ 0x0520, "SiteLockChecks" },
+	{ 0x0529, "SiteLockChecks" },
+	{ 0x052d, "CitrixOS2 AppServer" },
+	{ 0x0535, "Tektronix" },
+	{ 0x0536, "Milan" },
+	{ 0x055d, "Attachmate SNA gateway" },
+	{ 0x056b, "IBM8235 ModemServer" },
+	{ 0x056c, "ShivaLanRover/E PLUS" },
+	{ 0x056d, "ShivaLanRover/T PLUS" },
+	{ 0x0580, "McAfeeNetShield" },
+	{ 0x05B8, "NLM to workstation communication (Revelation Software)" },
+	{ 0x05BA, "CompatibleSystemsRouters" },
+	{ 0x05BE, "CheyenneHierarchicalStorageManager" },
+	{ 0x0606, "JCWatermarkImaging" },
+	{ 0x060c, "AXISNetworkPrinter" },
+	{ 0x0610, "AdaptecSCSIManagement" },
+	{ 0x0621, "IBM AntiVirus" },
+	{ 0x0640, "Windows95 RemoteRegistryService" },
+	{ 0x064e, "MicrosoftIIS" },
+	{ 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
+	{ 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
+	{ 0x076C, "Xerox" },
+	{ 0x079b, "ShivaLanRover/E 115" },
+	{ 0x079c, "ShivaLanRover/T 115" },
+	{ 0x07B4, "CubixWorldDesk" },
+	{ 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
+	{ 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
+	{ 0x0810, "ELAN License Server Demo" },
+	{ 0x0824, "ShivaLanRoverAccessSwitch/E" },
+	{ 0x086a, "ISSC Collector" },
+	{ 0x087f, "ISSC DAS AgentAIX" },
+	{ 0x0880, "Intel Netport PRO" },
+	{ 0x0881, "Intel Netport PRO" },
+	{ 0x0b29, "SiteLock" },
+	{ 0x0c29, "SiteLockApplications" },
+	{ 0x0c2c, "LicensingServer" },
+	{ 0x2101, "PerformanceTechnologyInstantInternet" },
+	{ 0x2380, "LAI SiteLock" },
+	{ 0x238c, "MeetingMaker" },
+	{ 0x4808, "SiteLockServer/SiteLockMetering" },
+	{ 0x5555, "SiteLockUser" },
+	{ 0x6312, "Tapeware" },
+	{ 0x6f00, "RabbitGateway" },
+	{ 0x7703, "MODEM" },
+	{ 0x8002, "NetPortPrinters" },
+	{ 0x8008, "WordPerfectNetworkVersion" },
+	{ 0x85BE, "Cisco EIGRP" },
+	{ 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
+	{ 0x9000, "McAfeeNetShield" },
+	{ 0x9604, "CSA-NT_MON" },
+	{ 0xb6a8, "OceanIsleReachoutRemoteControl" },
+	{ 0xf11f, "SiteLockMetering" },
+	{ 0xf1ff, "SiteLock" },
+	{ 0xf503, "Microsoft SQL Server" },
+	{ 0xF905, "IBM TimeAndPlace" },
+	{ 0xfbfb, "TopCallIII FaxServer" },
+	{ 0xffff, "AnyService/Wildcard" },
+	{ 0, (char *)0 }
+};
+
+static void
+init_ipxsaparray(netdissect_options *ndo)
+{
+	int i;
+	struct hnamemem *table;
+
+	for (i = 0; ipxsap_db[i].s != NULL; i++) {
+		u_int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
+		table = &ipxsaptable[j];
+		while (table->name)
+			table = table->nxt;
+		table->name = ipxsap_db[i].s;
+		table->addr = htons(ipxsap_db[i].v);
+		table->nxt = newhnamemem(ndo);
+	}
+}
+
+/*
+ * Initialize the address to name translation machinery.  We map all
+ * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
+ * (i.e., to prevent blocking on the nameserver).  localnet is the IP address
+ * of the local network.  mask is its subnet mask.
+ */
+void
+init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
+{
+	if (ndo->ndo_fflag) {
+		f_localnet = localnet;
+		f_netmask = mask;
+	}
+	if (ndo->ndo_nflag)
+		/*
+		 * Simplest way to suppress names.
+		 */
+		return;
+
+	init_etherarray(ndo);
+	init_servarray(ndo);
+	init_eprotoarray(ndo);
+	init_protoidarray(ndo);
+	init_ipxsaparray(ndo);
+}
+
+const char *
+dnaddr_string(netdissect_options *ndo, u_short dnaddr)
+{
+	struct hnamemem *tp;
+
+	for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
+	     tp = tp->nxt)
+		if (tp->addr == dnaddr)
+			return (tp->name);
+
+	tp->addr = dnaddr;
+	tp->nxt = newhnamemem(ndo);
+	tp->name = dnnum_string(ndo, dnaddr);
+
+	return(tp->name);
+}
+
+/* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
+struct hnamemem *
+newhnamemem(netdissect_options *ndo)
+{
+	struct hnamemem *p;
+	static struct hnamemem *ptr = NULL;
+	static u_int num = 0;
+
+	if (num  == 0) {
+		num = 64;
+		ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
+		if (ptr == NULL)
+			(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					  "%s: calloc", __func__);
+	}
+	--num;
+	p = ptr++;
+	return (p);
+}
+
+/* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
+struct h6namemem *
+newh6namemem(netdissect_options *ndo)
+{
+	struct h6namemem *p;
+	static struct h6namemem *ptr = NULL;
+	static u_int num = 0;
+
+	if (num  == 0) {
+		num = 64;
+		ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
+		if (ptr == NULL)
+			(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+					  "%s: calloc", __func__);
+	}
+	--num;
+	p = ptr++;
+	return (p);
+}
+
+/* Represent TCI part of the 802.1Q 4-octet tag as text. */
+const char *
+ieee8021q_tci_string(const uint16_t tci)
+{
+	static char buf[128];
+	snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
+	         tci & 0xfff,
+	         tci >> 13,
+	         (tci & 0x1000) ? ", DEI" : "");
+	return buf;
+}