Don't require IPv6 library support in order to support IPv6 addresses.

Have our own routines to convert between IPv4/IPv6 addresses and
strings; that helps if, for example, we want to build binary versions of
tcpdump for Windows that can run both on NT 5 (W2K/WXP), which doesn't
have inet_ntop() or inet_pton(), and NT 6 (Vista/7/8/10), which do.  It
also means that we don't require IPv6 library support on UN*X to print
addresses (if somebody wants to build tcpdump for older UN*Xes lacking
IPv6 support in the system library or in add-on libraries).

Get rid of files in the missing directory that we don't need, and
various no-longer-necessary autoconf tests.

5 files changed, 0 insertions, 711 deletions

diff --git a/missing/addrinfo.h b/missing/addrinfo.h
deleted file mode 100644
index bf4bbf6e..00000000
--- a/missing/addrinfo.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
- * 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. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
- */
-
-#ifndef HAVE_ADDRINFO
-
-/*
- * Error return codes from getaddrinfo()
- */
-#define	EAI_ADDRFAMILY	 1	/* address family for hostname not supported */
-#define	EAI_AGAIN	 2	/* temporary failure in name resolution */
-#define	EAI_BADFLAGS	 3	/* invalid value for ai_flags */
-#define	EAI_FAIL	 4	/* non-recoverable failure in name resolution */
-#define	EAI_FAMILY	 5	/* ai_family not supported */
-#define	EAI_MEMORY	 6	/* memory allocation failure */
-#define	EAI_NODATA	 7	/* no address associated with hostname */
-#define	EAI_NONAME	 8	/* hostname nor servname provided, or not known */
-#define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
-#define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
-#define	EAI_SYSTEM	11	/* system error returned in errno */
-#define EAI_BADHINTS	12
-#define EAI_PROTOCOL	13
-#define EAI_MAX		14
-
-/* internal error */
-#define	NETDB_INTERNAL	-1	/* see errno */
-
-/*
- * Flag values for getaddrinfo()
- */
-#define	AI_PASSIVE	0x00000001 /* get address to use bind() */
-#define	AI_CANONNAME	0x00000002 /* fill ai_canonname */
-#define	AI_NUMERICHOST	0x00000004 /* prevent name resolution */
-/* valid flags for addrinfo */
-#define	AI_MASK		(AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
-
-#define	AI_ALL		0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
-#define	AI_V4MAPPED_CFG	0x00000200 /* accept IPv4-mapped if kernel supports */
-#define	AI_ADDRCONFIG	0x00000400 /* only if any address is assigned */
-#define	AI_V4MAPPED	0x00000800 /* accept IPv4-mapped IPv6 address */
-/* special recommended flags for getipnodebyname */
-#define	AI_DEFAULT	(AI_V4MAPPED_CFG | AI_ADDRCONFIG)
-
-struct addrinfo {
-	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME */
-	int	ai_family;	/* PF_xxx */
-	int	ai_socktype;	/* SOCK_xxx */
-	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
-	size_t	ai_addrlen;	/* length of ai_addr */
-	char	*ai_canonname;	/* canonical name for hostname */
-	struct sockaddr *ai_addr;	/* binary address */
-	struct addrinfo *ai_next;	/* next structure in linked list */
-};
-
-extern void freeaddrinfo (struct addrinfo *);
-extern void freehostent (struct hostent *);
-extern int getnameinfo (const struct sockaddr *, size_t, char *,
-			    size_t, char *, size_t, int);
-extern struct hostent *getipnodebyaddr (const void *, size_t, int, int *);
-extern struct hostent *getipnodebyname (const char *, int, int, int *);
-extern int inet_pton (int, const char *, void *);
-extern const char *inet_ntop (int, const void *, char *, size_t);
-#endif /* HAVE_ADDRINFO */
-
-/*
- * Constants for getnameinfo()
- */
-#ifndef NI_MAXHOST
-#define	NI_MAXHOST	1025
-#endif
-#ifndef NI_MAXSERV
-#define	NI_MAXSERV	32
-#endif
-
-/*
- * Flag values for getnameinfo()
- */
-#ifndef NI_NOFQDN
-#define	NI_NOFQDN	0x00000001
-#endif
-#ifndef NI_NUMERICHOST
-#define	NI_NUMERICHOST	0x00000002
-#endif
-#ifndef NI_NAMEREQD
-#define	NI_NAMEREQD	0x00000004
-#endif
-#ifndef NI_NUMERICSERV
-#define	NI_NUMERICSERV	0x00000008
-#endif
-#ifndef NI_DGRAM
-#define	NI_DGRAM	0x00000010
-#endif
diff --git a/missing/getnameinfo.c b/missing/getnameinfo.c
deleted file mode 100644
index 63aba731..00000000
--- a/missing/getnameinfo.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
- * 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. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
- */
-
-/*
- * Issues to be discussed:
- * - Thread safe-ness must be checked
- * - Return values.  There seems to be no standard for return value (RFC2553)
- *   but INRIA implementation returns EAI_xxx defined for getaddrinfo().
- * - RFC2553 says that we should raise error on short buffer.  X/Open says
- *   we need to truncate the result.  We obey RFC2553 (and X/Open should be
- *   modified).
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <net/if.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <arpa/nameser.h>
-#include <netdb.h>
-#include <resolv.h>
-#include <string.h>
-#include <stddef.h>
-#include <errno.h>
-
-#ifdef NEED_ADDRINFO_H
-#include "addrinfo.h"
-#endif
-
-#define SUCCESS 0
-#define ANY 0
-#define YES 1
-#define NO  0
-
-static struct afd {
-	int a_af;
-	int a_addrlen;
-	int a_socklen;
-	int a_off;
-} afdl [] = {
-#ifdef INET6
-	{PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
-		offsetof(struct sockaddr_in6, sin6_addr)},
-#endif
-	{PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
-		offsetof(struct sockaddr_in, sin_addr)},
-	{0, 0, 0},
-};
-
-struct sockinet {
-	u_char	si_len;
-	u_char	si_family;
-	u_short	si_port;
-};
-
-#define ENI_NOSOCKET 	0
-#define ENI_NOSERVNAME	1
-#define ENI_NOHOSTNAME	2
-#define ENI_MEMORY	3
-#define ENI_SYSTEM	4
-#define ENI_FAMILY	5
-#define ENI_SALEN	6
-
-int
-getnameinfo(sa, salen, host, hostlen, serv, servlen, flags)
-	const struct sockaddr *sa;
-	size_t salen;
-	char *host;
-	size_t hostlen;
-	char *serv;
-	size_t servlen;
-	int flags;
-{
-	struct afd *afd;
-	struct servent *sp;
-	struct hostent *hp;
-	u_short port;
-	int family, i;
-	char *addr, *p;
-	uint32_t v4a;
-	int h_error;
-	char numserv[512];
-	char numaddr[512];
-
-	if (sa == NULL)
-		return ENI_NOSOCKET;
-
-#ifdef HAVE_SA_LEN	/*XXX*/
-	if (sa->sa_len != salen)
-		return ENI_SALEN;
-#endif
-
-	family = sa->sa_family;
-	for (i = 0; afdl[i].a_af; i++)
-		if (afdl[i].a_af == family) {
-			afd = &afdl[i];
-			goto found;
-		}
-	return ENI_FAMILY;
-
- found:
-	if (salen != afd->a_socklen)
-		return ENI_SALEN;
-
-	port = ((struct sockinet *)sa)->si_port; /* network byte order */
-	addr = (char *)sa + afd->a_off;
-
-	if (serv == NULL || servlen == 0) {
-		/*
-		 * do nothing in this case.
-		 * in case you are wondering if "&&" is more correct than
-		 * "||" here: RFC2553 says that serv == NULL OR servlen == 0
-		 * means that the caller does not want the result.
-		 */
-	} else {
-		if (flags & NI_NUMERICSERV)
-			sp = NULL;
-		else {
-			sp = getservbyport(port,
-				(flags & NI_DGRAM) ? "udp" : "tcp");
-		}
-		if (sp) {
-			if (strlen(sp->s_name) + 1 > servlen)
-				return ENI_MEMORY;
-			strcpy(serv, sp->s_name);
-		} else {
-			snprintf(numserv, sizeof(numserv), "%d", ntohs(port));
-			if (strlen(numserv) + 1 > servlen)
-				return ENI_MEMORY;
-			strcpy(serv, numserv);
-		}
-	}
-
-	switch (sa->sa_family) {
-	case AF_INET:
-                v4a = (uint32_t)
-			ntohl(((struct sockaddr_in *)sa)->sin_addr.s_addr);
-		if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
-			flags |= NI_NUMERICHOST;
-		v4a >>= IN_CLASSA_NSHIFT;
-		if (v4a == 0)
-			flags |= NI_NUMERICHOST;
-		break;
-#ifdef INET6
-	case AF_INET6:
-	    {
-		struct sockaddr_in6 *sin6;
-		sin6 = (struct sockaddr_in6 *)sa;
-		switch (sin6->sin6_addr.s6_addr[0]) {
-		case 0x00:
-			if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
-				;
-			else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
-				;
-			else
-				flags |= NI_NUMERICHOST;
-			break;
-		default:
-			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
-				flags |= NI_NUMERICHOST;
-			}
-			else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
-				flags |= NI_NUMERICHOST;
-			break;
-		}
-	    }
-		break;
-#endif
-	}
-	if (host == NULL || hostlen == 0) {
-		/*
-		 * do nothing in this case.
-		 * in case you are wondering if "&&" is more correct than
-		 * "||" here: RFC2553 says that host == NULL OR hostlen == 0
-		 * means that the caller does not want the result.
-		 */
-	} else if (flags & NI_NUMERICHOST) {
-		/* NUMERICHOST and NAMEREQD conflicts with each other */
-		if (flags & NI_NAMEREQD)
-			return ENI_NOHOSTNAME;
-		if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr))
-		    == NULL)
-			return ENI_SYSTEM;
-		if (strlen(numaddr) + 1 > hostlen)
-			return ENI_MEMORY;
-		strcpy(host, numaddr);
-#if defined(INET6) && defined(NI_WITHSCOPEID)
-		if (afd->a_af == AF_INET6 &&
-		    (IN6_IS_ADDR_LINKLOCAL((struct in6_addr *)addr) ||
-		     IN6_IS_ADDR_MULTICAST((struct in6_addr *)addr)) &&
-		    ((struct sockaddr_in6 *)sa)->sin6_scope_id) {
-#ifndef ALWAYS_WITHSCOPE
-			if (flags & NI_WITHSCOPEID)
-#endif /* !ALWAYS_WITHSCOPE */
-			{
-				char *ep = strchr(host, '\0');
-				unsigned int ifindex =
-					((struct sockaddr_in6 *)sa)->sin6_scope_id;
-
-				*ep = SCOPE_DELIMITER;
-				if ((if_indextoname(ifindex, ep + 1)) == NULL)
-					/* XXX what should we do? */
-					strncpy(ep + 1, "???", 3);
-			}
-		}
-#endif /* INET6 */
-	} else {
-#ifdef USE_GETIPNODEBY
-		hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error);
-#else
-		hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);
-#ifdef HAVE_H_ERRNO
-		h_error = h_errno;
-#else
-		h_error = EINVAL;
-#endif
-#endif
-
-		if (hp) {
-			if (flags & NI_NOFQDN) {
-				p = strchr(hp->h_name, '.');
-				if (p) *p = '\0';
-			}
-			if (strlen(hp->h_name) + 1 > hostlen) {
-#ifdef USE_GETIPNODEBY
-				freehostent(hp);
-#endif
-				return ENI_MEMORY;
-			}
-			strcpy(host, hp->h_name);
-#ifdef USE_GETIPNODEBY
-			freehostent(hp);
-#endif
-		} else {
-			if (flags & NI_NAMEREQD)
-				return ENI_NOHOSTNAME;
-			if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr))
-			    == NULL)
-				return ENI_NOHOSTNAME;
-			if (strlen(numaddr) + 1 > hostlen)
-				return ENI_MEMORY;
-			strcpy(host, numaddr);
-		}
-	}
-	return SUCCESS;
-}
diff --git a/missing/inet_aton.c b/missing/inet_aton.c
deleted file mode 100644
index 098dc857..00000000
--- a/missing/inet_aton.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * 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 the Kungliga Tekniska
- *      Högskolan and its contributors.
- *
- * 4. Neither the name of the Institute 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 BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
- */
-
-#include <netdissect-stdinc.h>
-
-/* Minimal implementation of inet_aton.
- * Cannot distinguish between failure and a local broadcast address. */
-
-#ifndef INADDR_NONE
-#define INADDR_NONE 0xffffffff
-#endif
-
-int
-inet_aton(const char *cp, struct in_addr *addr)
-{
-  addr->s_addr = inet_addr(cp);
-  return (addr->s_addr == INADDR_NONE) ? 0 : 1;
-}
diff --git a/missing/inet_ntop.c b/missing/inet_ntop.c
deleted file mode 100644
index 77928db9..00000000
--- a/missing/inet_ntop.c
+++ /dev/null
@@ -1,216 +0,0 @@
-/*
- * Copyright (c) 1999 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * 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 the Kungliga Tekniska
- *      Högskolan and its contributors.
- *
- * 4. Neither the name of the Institute 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 BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <netdissect-stdinc.h>
-
-#include <stdio.h>
-
-/*
- *
- */
-
-#ifndef IN6ADDRSZ
-#define IN6ADDRSZ   16   /* IPv6 T_AAAA */
-#endif
-
-#ifndef INT16SZ
-#define INT16SZ     2    /* word size */
-#endif
-
-static const char *
-inet_ntop_v4 (const void *src, char *dst, size_t size)
-{
-    const char digits[] = "0123456789";
-    int i;
-    struct in_addr *addr = (struct in_addr *)src;
-    u_long a = ntohl(addr->s_addr);
-    const char *orig_dst = dst;
-
-    if (size < INET_ADDRSTRLEN) {
-	errno = ENOSPC;
-	return NULL;
-    }
-    for (i = 0; i < 4; ++i) {
-	int n = (a >> (24 - i * 8)) & 0xFF;
-	int non_zerop = 0;
-
-	if (non_zerop || n / 100 > 0) {
-	    *dst++ = digits[n / 100];
-	    n %= 100;
-	    non_zerop = 1;
-	}
-	if (non_zerop || n / 10 > 0) {
-	    *dst++ = digits[n / 10];
-	    n %= 10;
-	    non_zerop = 1;
-	}
-	*dst++ = digits[n];
-	if (i != 3)
-	    *dst++ = '.';
-    }
-    *dst++ = '\0';
-    return orig_dst;
-}
-
-#ifdef INET6
-/*
- * Convert IPv6 binary address into presentation (printable) format.
- */
-static const char *
-inet_ntop_v6 (const u_char *src, char *dst, size_t size)
-{
-  /*
-   * Note that int32_t and int16_t need only be "at least" large enough
-   * to contain a value of the specified size.  On some systems, like
-   * Crays, there is no such thing as an integer variable with 16 bits.
-   * Keep this in mind if you think this function should have been coded
-   * to use pointer overlays.  All the world's not a VAX.
-   */
-  char  tmp [INET6_ADDRSTRLEN+1];
-  char *tp;
-  struct {
-    long base;
-    long len;
-  } best, cur;
-  u_long words [IN6ADDRSZ / INT16SZ];
-  int    i;
-
-  /* Preprocess:
-   *  Copy the input (bytewise) array into a wordwise array.
-   *  Find the longest run of 0x00's in src[] for :: shorthanding.
-   */
-  memset (words, 0, sizeof(words));
-  for (i = 0; i < IN6ADDRSZ; i++)
-      words[i/2] |= (src[i] << ((1 - (i % 2)) << 3));
-
-  best.len = 0;
-  best.base = -1;
-  cur.len = 0;
-  cur.base  = -1;
-  for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++)
-  {
-    if (words[i] == 0)
-    {
-      if (cur.base == -1)
-           cur.base = i, cur.len = 1;
-      else cur.len++;
-    }
-    else if (cur.base != -1)
-    {
-      if (best.base == -1 || cur.len > best.len)
-         best = cur;
-      cur.base = -1;
-    }
-  }
-  if ((cur.base != -1) && (best.base == -1 || cur.len > best.len))
-     best = cur;
-  if (best.base != -1 && best.len < 2)
-     best.base = -1;
-
-  /* Format the result.
-   */
-  tp = tmp;
-  for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++)
-  {
-    /* Are we inside the best run of 0x00's?
-     */
-    if (best.base != -1 && i >= best.base && i < (best.base + best.len))
-    {
-      if (i == best.base)
-         *tp++ = ':';
-      continue;
-    }
-
-    /* Are we following an initial run of 0x00s or any real hex?
-     */
-    if (i != 0)
-       *tp++ = ':';
-
-    /* Is this address an encapsulated IPv4?
-     */
-    if (i == 6 && best.base == 0 &&
-        (best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
-    {
-      if (!inet_ntop_v4(src+12, tp, sizeof(tmp) - (tp - tmp)))
-      {
-        errno = ENOSPC;
-        return (NULL);
-      }
-      tp += strlen(tp);
-      break;
-    }
-    tp += sprintf (tp, "%lx", words[i]);
-  }
-
-  /* Was it a trailing run of 0x00's?
-   */
-  if (best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ))
-     *tp++ = ':';
-  *tp++ = '\0';
-
-  /* Check for overflow, copy, and we're done.
-   */
-  if ((size_t)(tp - tmp) > size)
-  {
-    errno = ENOSPC;
-    return (NULL);
-  }
-  return strcpy (dst, tmp);
-}
-#endif   /* INET6 */
-
-
-const char *
-inet_ntop(int af, const void *src, char *dst, size_t size)
-{
-    switch (af) {
-    case AF_INET :
-	return inet_ntop_v4 (src, dst, size);
-#ifdef INET6
-    case AF_INET6:
-         return inet_ntop_v6 ((const u_char*)src, dst, size);
-#endif
-    default :
-	errno = EAFNOSUPPORT;
-	return NULL;
-    }
-}
diff --git a/missing/inet_pton.c b/missing/inet_pton.c
deleted file mode 100644
index 66269e22..00000000
--- a/missing/inet_pton.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (c) 1999 Kungliga Tekniska H�gskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * 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 the Kungliga Tekniska
- *      H�gskolan and its contributors.
- *
- * 4. Neither the name of the Institute 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 BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
- */
-
-#include <netdissect-stdinc.h>
-
-int
-inet_pton(int af, const char *src, void *dst)
-{
-    if (af != AF_INET) {
-	errno = EAFNOSUPPORT;
-	return -1;
-    }
-    return inet_aton (src, dst);
-}