Nothing in missing/getaddrinfo.c is used in tcpdump, and it's a pain to

make it build on Tru64 UNIX, so get rid of it.

2 files changed, 0 insertions, 1118 deletions

diff --git a/missing/addrinfo.h b/missing/addrinfo.h
index 1b5f92ec..d3d63cd7 100644
--- a/missing/addrinfo.h
+++ b/missing/addrinfo.h
@@ -81,9 +81,6 @@ struct addrinfo {
 
 extern void freeaddrinfo (struct addrinfo *);
 extern void freehostent (struct hostent *);
-extern char *gai_strerror (int);
-extern int getaddrinfo (const char *, const char *,
-			    const struct addrinfo *, struct addrinfo **);
 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 *);
diff --git a/missing/getaddrinfo.c b/missing/getaddrinfo.c
deleted file mode 100644
index d74d5bca..00000000
--- a/missing/getaddrinfo.c
+++ /dev/null
@@ -1,1115 +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.
- */
-
-/*
- * "#ifdef FAITH" part is local hack for supporting IPv4-v6 translator.
- *
- * Issues to be discussed:
- * - Thread safe-ness must be checked.
- * - Return values.  There are nonstandard return values defined and used
- *   in the source code.  This is because RFC2553 is silent about which error
- *   code must be returned for which situation.
- * Note:
- * - We use getipnodebyname() just for thread-safeness.  There's no intent
- *   to let it do PF_UNSPEC (actually we never pass PF_UNSPEC to
- *   getipnodebyname().
- * - The code filters out AFs that are not supported by the kernel,
- *   when globbing NULL hostname (to loopback, or wildcard).  Is it the right
- *   thing to do?  What is the relationship with post-RFC2553 AI_ADDRCONFIG
- *   in ai_flags?
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#ifndef lint
-static const char rcsid[] _U_ =
-     "@(#) $Header: /tcpdump/master/tcpdump/missing/getaddrinfo.c,v 1.13 2003-11-16 09:36:48 guy Exp $";
-#endif
-
-#include <sys/types.h>
-#include <sys/param.h>
-#if 0
-#include <sys/sysctl.h>
-#endif
-#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 <stdlib.h>
-#include <stddef.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <errno.h>
-
-#ifndef HAVE_U_INT32_T
-#include "bittypes.h"
-#endif
-
-#ifndef HAVE_SOCKADDR_STORAGE
-#include "sockstorage.h"
-#endif
-
-#ifdef NEED_ADDRINFO_H
-#include "addrinfo.h"
-#endif
-
-#if defined(__KAME__) && defined(INET6)
-# define FAITH
-#endif
-
-#define SUCCESS 0
-#define ANY 0
-#define YES 1
-#define NO  0
-
-#ifdef FAITH
-static int translate = NO;
-static struct in6_addr faith_prefix = IN6ADDR_ANY_INIT;
-#endif
-
-static const char in_addrany[] = { 0, 0, 0, 0 };
-static const char in6_addrany[] = {
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-static const char in_loopback[] = { 127, 0, 0, 1 };
-static const char in6_loopback[] = {
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
-};
-
-struct sockinet {
-	u_char	si_len;
-	u_char	si_family;
-	u_short	si_port;
-	u_int32_t si_scope_id;
-};
-
-static const struct afd {
-	int a_af;
-	int a_addrlen;
-	int a_socklen;
-	int a_off;
-	const char *a_addrany;
-	const char *a_loopback;
-	int a_scoped;
-} afdl [] = {
-#ifdef INET6
-	{PF_INET6, sizeof(struct in6_addr),
-	 sizeof(struct sockaddr_in6),
-	 offsetof(struct sockaddr_in6, sin6_addr),
-	 in6_addrany, in6_loopback, 1},
-#endif
-	{PF_INET, sizeof(struct in_addr),
-	 sizeof(struct sockaddr_in),
-	 offsetof(struct sockaddr_in, sin_addr),
-	 in_addrany, in_loopback, 0},
-	{0, 0, 0, 0, NULL, NULL, 0},
-};
-
-struct explore {
-	int e_af;
-	int e_socktype;
-	int e_protocol;
-	const char *e_protostr;
-	int e_wild;
-#define WILD_AF(ex)		((ex)->e_wild & 0x01)
-#define WILD_SOCKTYPE(ex)	((ex)->e_wild & 0x02)
-#define WILD_PROTOCOL(ex)	((ex)->e_wild & 0x04)
-};
-
-static const struct explore explore[] = {
-#if 0
-	{ PF_LOCAL, 0, ANY, ANY, NULL, 0x01 },
-#endif
-#ifdef INET6
-	{ PF_INET6, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 },
-	{ PF_INET6, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 },
-	{ PF_INET6, SOCK_RAW, ANY, NULL, 0x05 },
-#endif
-	{ PF_INET, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 },
-	{ PF_INET, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 },
-	{ PF_INET, SOCK_RAW, ANY, NULL, 0x05 },
-	{ -1, 0, 0, NULL, 0 },
-};
-
-#ifdef INET6
-#define PTON_MAX	16
-#else
-#define PTON_MAX	4
-#endif
-
-
-static int str_isnumber (const char *);
-static int explore_fqdn (const struct addrinfo *, const char *,
-	const char *, struct addrinfo **);
-static int explore_null (const struct addrinfo *, const char *,
-	const char *, struct addrinfo **);
-static int explore_numeric (const struct addrinfo *, const char *,
-	const char *, struct addrinfo **);
-static int explore_numeric_scope (const struct addrinfo *, const char *,
-	const char *, struct addrinfo **);
-static int get_name (const char *, const struct afd *, struct addrinfo **,
-	char *, const struct addrinfo *, const char *);
-static int get_canonname (const struct addrinfo *,
-	struct addrinfo *, const char *);
-static struct addrinfo *get_ai (const struct addrinfo *,
-	const struct afd *, const char *);
-static int get_portmatch (const struct addrinfo *, const char *);
-static int get_port (struct addrinfo *, const char *, int);
-static const struct afd *find_afd (int);
-
-static char *ai_errlist[] = {
-	"Success",
-	"Address family for hostname not supported",	/* EAI_ADDRFAMILY */
-	"Temporary failure in name resolution",		/* EAI_AGAIN      */
-	"Invalid value for ai_flags",		       	/* EAI_BADFLAGS   */
-	"Non-recoverable failure in name resolution", 	/* EAI_FAIL       */
-	"ai_family not supported",			/* EAI_FAMILY     */
-	"Memory allocation failure", 			/* EAI_MEMORY     */
-	"No address associated with hostname", 		/* EAI_NODATA     */
-	"hostname nor servname provided, or not known",	/* EAI_NONAME     */
-	"servname not supported for ai_socktype",	/* EAI_SERVICE    */
-	"ai_socktype not supported", 			/* EAI_SOCKTYPE   */
-	"System error returned in errno", 		/* EAI_SYSTEM     */
-	"Invalid value for hints",			/* EAI_BADHINTS	  */
-	"Resolved protocol is unknown",			/* EAI_PROTOCOL   */
-	"Unknown error", 				/* EAI_MAX        */
-};
-
-/* XXX macros that make external reference is BAD. */
-
-#define GET_AI(ai, afd, addr) \
-do { \
-	/* external reference: pai, error, and label free */ \
-	(ai) = get_ai(pai, (afd), (addr)); \
-	if ((ai) == NULL) { \
-		error = EAI_MEMORY; \
-		goto free; \
-	} \
-} while (0)
-
-#define GET_PORT(ai, serv) \
-do { \
-	/* external reference: error and label free */ \
-	error = get_port((ai), (serv), 0); \
-	if (error != 0) \
-		goto free; \
-} while (0)
-
-#define GET_CANONNAME(ai, str) \
-do { \
-	/* external reference: pai, error and label free */ \
-	error = get_canonname(pai, (ai), (str)); \
-	if (error != 0) \
-		goto free; \
-} while (0)
-
-#define ERR(err) \
-do { \
-	/* external reference: error, and label bad */ \
-	error = (err); \
-	goto bad; \
-} while (0)
-
-#define MATCH_FAMILY(x, y, w) \
-	((x) == (y) || ((w) && ((x) == PF_UNSPEC || (y) == PF_UNSPEC)))
-#define MATCH(x, y, w) \
-	((x) == (y) || ((w) && ((x) == ANY || (y) == ANY)))
-
-char *
-gai_strerror(ecode)
-	int ecode;
-{
-	if (ecode < 0 || ecode > EAI_MAX)
-		ecode = EAI_MAX;
-	return ai_errlist[ecode];
-}
-
-void
-freeaddrinfo(ai)
-	struct addrinfo *ai;
-{
-	struct addrinfo *next;
-
-	do {
-		next = ai->ai_next;
-		if (ai->ai_canonname)
-			free(ai->ai_canonname);
-		/* no need to free(ai->ai_addr) */
-		free(ai);
-	} while ((ai = next) != NULL);
-}
-
-static int
-str_isnumber(p)
-	const char *p;
-{
-	char *q = (char *)p;
-	while (*q) {
-		if (! isdigit((unsigned char)*q))
-			return NO;
-		q++;
-	}
-	return YES;
-}
-
-int
-getaddrinfo(hostname, servname, hints, res)
-	const char *hostname, *servname;
-	const struct addrinfo *hints;
-	struct addrinfo **res;
-{
-	struct addrinfo sentinel;
-	struct addrinfo *cur;
-	int error = 0;
-	struct addrinfo ai;
-	struct addrinfo ai0;
-	struct addrinfo *pai;
-	const struct afd *afd;
-	const struct explore *ex;
-
-#ifdef FAITH
-	static int firsttime = 1;
-
-	if (firsttime) {
-		/* translator hack */
-		char *q = getenv("GAI");
-		if (q && inet_pton(AF_INET6, q, &faith_prefix) == 1)
-			translate = YES;
-		firsttime = 0;
-	}
-#endif
-
-	sentinel.ai_next = NULL;
-	cur = &sentinel;
-	pai = &ai;
-	pai->ai_flags = 0;
-	pai->ai_family = PF_UNSPEC;
-	pai->ai_socktype = ANY;
-	pai->ai_protocol = ANY;
-	pai->ai_addrlen = 0;
-	pai->ai_canonname = NULL;
-	pai->ai_addr = NULL;
-	pai->ai_next = NULL;
-
-	if (hostname == NULL && servname == NULL)
-		return EAI_NONAME;
-	if (hints) {
-		/* error check for hints */
-		if (hints->ai_addrlen || hints->ai_canonname ||
-		    hints->ai_addr || hints->ai_next)
-			ERR(EAI_BADHINTS); /* xxx */
-		if (hints->ai_flags & ~AI_MASK)
-			ERR(EAI_BADFLAGS);
-		switch (hints->ai_family) {
-		case PF_UNSPEC:
-		case PF_INET:
-#ifdef INET6
-		case PF_INET6:
-#endif
-			break;
-		default:
-			ERR(EAI_FAMILY);
-		}
-		memcpy(pai, hints, sizeof(*pai));
-
-		/*
-		 * if both socktype/protocol are specified, check if they
-		 * are meaningful combination.
-		 */
-		if (pai->ai_socktype != ANY && pai->ai_protocol != ANY) {
-			for (ex = explore; ex->e_af >= 0; ex++) {
-				if (pai->ai_family != ex->e_af)
-					continue;
-				if (ex->e_socktype == ANY)
-					continue;
-				if (ex->e_protocol == ANY)
-					continue;
-				if (pai->ai_socktype == ex->e_socktype
-				 && pai->ai_protocol != ex->e_protocol) {
-					ERR(EAI_BADHINTS);
-				}
-			}
-		}
-	}
-
-	/*
-	 * check for special cases.  (1) numeric servname is disallowed if
-	 * socktype/protocol are left unspecified. (2) servname is disallowed
-	 * for raw and other inet{,6} sockets.
-	 */
-	if (MATCH_FAMILY(pai->ai_family, PF_INET, 1)
-#ifdef PF_INET6
-	 || MATCH_FAMILY(pai->ai_family, PF_INET6, 1)
-#endif
-	    ) {
-		ai0 = *pai;
-
-		if (pai->ai_family == PF_UNSPEC) {
-#ifdef PF_INET6
-			pai->ai_family = PF_INET6;
-#else
-			pai->ai_family = PF_INET;
-#endif
-		}
-		error = get_portmatch(pai, servname);
-		if (error)
-			ERR(error);
-
-		*pai = ai0;
-	}
-
-	ai0 = *pai;
-
-	/* NULL hostname, or numeric hostname */
-	for (ex = explore; ex->e_af >= 0; ex++) {
-		*pai = ai0;
-
-		if (!MATCH_FAMILY(pai->ai_family, ex->e_af, WILD_AF(ex)))
-			continue;
-		if (!MATCH(pai->ai_socktype, ex->e_socktype, WILD_SOCKTYPE(ex)))
-			continue;
-		if (!MATCH(pai->ai_protocol, ex->e_protocol, WILD_PROTOCOL(ex)))
-			continue;
-
-		if (pai->ai_family == PF_UNSPEC)
-			pai->ai_family = ex->e_af;
-		if (pai->ai_socktype == ANY && ex->e_socktype != ANY)
-			pai->ai_socktype = ex->e_socktype;
-		if (pai->ai_protocol == ANY && ex->e_protocol != ANY)
-			pai->ai_protocol = ex->e_protocol;
-
-		if (hostname == NULL)
-			error = explore_null(pai, hostname, servname, &cur->ai_next);
-		else
-			error = explore_numeric_scope(pai, hostname, servname, &cur->ai_next);
-
-		if (error)
-			goto free;
-
-		while (cur && cur->ai_next)
-			cur = cur->ai_next;
-	}
-
-	/*
-	 * XXX
-	 * If numreic representation of AF1 can be interpreted as FQDN
-	 * representation of AF2, we need to think again about the code below.
-	 */
-	if (sentinel.ai_next)
-		goto good;
-
-	if (pai->ai_flags & AI_NUMERICHOST)
-		ERR(EAI_NONAME);
-	if (hostname == NULL)
-		ERR(EAI_NONAME);
-
-	/*
-	 * hostname as alphabetical name.
-	 * we would like to prefer AF_INET6 than AF_INET, so we'll make a
-	 * outer loop by AFs.
-	 */
-	for (afd = afdl; afd->a_af; afd++) {
-		*pai = ai0;
-
-		if (!MATCH_FAMILY(pai->ai_family, afd->a_af, 1))
-			continue;
-
-		for (ex = explore; ex->e_af >= 0; ex++) {
-			*pai = ai0;
-
-			if (pai->ai_family == PF_UNSPEC)
-				pai->ai_family = afd->a_af;
-
-			if (!MATCH_FAMILY(pai->ai_family, ex->e_af, WILD_AF(ex)))
-				continue;
-			if (!MATCH(pai->ai_socktype, ex->e_socktype,
-					WILD_SOCKTYPE(ex))) {
-				continue;
-			}
-			if (!MATCH(pai->ai_protocol, ex->e_protocol,
-					WILD_PROTOCOL(ex))) {
-				continue;
-			}
-
-			if (pai->ai_family == PF_UNSPEC)
-				pai->ai_family = ex->e_af;
-			if (pai->ai_socktype == ANY && ex->e_socktype != ANY)
-				pai->ai_socktype = ex->e_socktype;
-			if (pai->ai_protocol == ANY && ex->e_protocol != ANY)
-				pai->ai_protocol = ex->e_protocol;
-
-			error = explore_fqdn(pai, hostname, servname,
-				&cur->ai_next);
-
-			while (cur && cur->ai_next)
-				cur = cur->ai_next;
-		}
-	}
-
-	/* XXX */
-	if (sentinel.ai_next)
-		error = 0;
-
-	if (error)
-		goto free;
-	if (error == 0) {
-		if (sentinel.ai_next) {
- good:
-			*res = sentinel.ai_next;
-			return SUCCESS;
-		} else
-			error = EAI_FAIL;
-	}
- free:
- bad:
-	if (sentinel.ai_next)
-		freeaddrinfo(sentinel.ai_next);
-	*res = NULL;
-	return error;
-}
-
-/*
- * FQDN hostname, DNS lookup
- */
-static int
-explore_fqdn(pai, hostname, servname, res)
-	const struct addrinfo *pai;
-	const char *hostname;
-	const char *servname;
-	struct addrinfo **res;
-{
-	struct hostent *hp;
-	int h_error;
-	int af;
-	char **aplist = NULL, *apbuf = NULL;
-	char *ap;
-	struct addrinfo sentinel, *cur;
-	int i;
-#ifndef USE_GETIPNODEBY
-	int naddrs;
-#endif
-	const struct afd *afd;
-	int error;
-
-	*res = NULL;
-	sentinel.ai_next = NULL;
-	cur = &sentinel;
-
-	/*
-	 * Do not filter unsupported AFs here.  We need to honor content of
-	 * databases (/etc/hosts, DNS and others).  Otherwise we cannot
-	 * replace gethostbyname() by getaddrinfo().
-	 */
-
-	/*
-	 * if the servname does not match socktype/protocol, ignore it.
-	 */
-	if (get_portmatch(pai, servname) != 0)
-		return 0;
-
-	afd = find_afd(pai->ai_family);
-
-	/*
-	 * post-RFC2553: should look at (pai->ai_flags & AI_ADDRCONFIG)
-	 * rather than hardcoding it.  we may need to add AI_ADDRCONFIG
-	 * handling code by ourselves in case we don't have getipnodebyname().
-	 */
-#ifdef USE_GETIPNODEBY
-	hp = getipnodebyname(hostname, pai->ai_family, AI_ADDRCONFIG, &h_error);
-#else
-#ifdef HAVE_GETHOSTBYNAME2
-	hp = gethostbyname2(hostname, pai->ai_family);
-#else
-	if (pai->ai_family != AF_INET)
-		return 0;
-	hp = gethostbyname(hostname);
-#ifdef HAVE_H_ERRNO
-	h_error = h_errno;
-#else
-	h_error = EINVAL;
-#endif
-#endif /*HAVE_GETHOSTBYNAME2*/
-#endif /*USE_GETIPNODEBY*/
-
-	if (hp == NULL) {
-		switch (h_error) {
-		case HOST_NOT_FOUND:
-		case NO_DATA:
-			error = EAI_NODATA;
-			break;
-		case TRY_AGAIN:
-			error = EAI_AGAIN;
-			break;
-		case NO_RECOVERY:
-		case NETDB_INTERNAL:
-		default:
-			error = EAI_FAIL;
-			break;
-		}
-	} else if ((hp->h_name == NULL) || (hp->h_name[0] == 0)
-			|| (hp->h_addr_list[0] == NULL)) {
-#ifdef USE_GETIPNODEBY
-		freehostent(hp);
-#endif
-		hp = NULL;
-		error = EAI_FAIL;
-	}
-
-	if (hp == NULL)
-		goto free;
-
-#ifdef USE_GETIPNODEBY
-	aplist = hp->h_addr_list;
-#else
-	/*
-	 * hp will be overwritten if we use gethostbyname2().
-	 * always deep copy for simplification.
-	 */
-	for (naddrs = 0; hp->h_addr_list[naddrs] != NULL; naddrs++)
-		;
-	naddrs++;
-	aplist = (char **)malloc(sizeof(aplist[0]) * naddrs);
-	apbuf = (char *)malloc(hp->h_length * naddrs);
-	if (aplist == NULL || apbuf == NULL) {
-		error = EAI_MEMORY;
-		goto free;
-	}
-	memset(aplist, 0, sizeof(aplist[0]) * naddrs);
-	for (i = 0; i < naddrs; i++) {
-		if (hp->h_addr_list[i] == NULL) {
-			aplist[i] = NULL;
-			continue;
-		}
-		memcpy(&apbuf[i * hp->h_length], hp->h_addr_list[i],
-			hp->h_length);
-		aplist[i] = &apbuf[i * hp->h_length];
-	}
-#endif
-
-	for (i = 0; aplist[i] != NULL; i++) {
-		af = hp->h_addrtype;
-		ap = aplist[i];
-#ifdef AF_INET6
-		if (af == AF_INET6
-		 && IN6_IS_ADDR_V4MAPPED((struct in6_addr *)ap)) {
-			af = AF_INET;
-			ap = ap + sizeof(struct in6_addr)
-				- sizeof(struct in_addr);
-		}
-#endif
-
-		if (af != pai->ai_family)
-			continue;
-
-		if ((pai->ai_flags & AI_CANONNAME) == 0) {
-			GET_AI(cur->ai_next, afd, ap);
-			GET_PORT(cur->ai_next, servname);
-		} else {
-			/*
-			 * if AI_CANONNAME and if reverse lookup
-			 * fail, return ai anyway to pacify
-			 * calling application.
-			 *
-			 * XXX getaddrinfo() is a name->address
-			 * translation function, and it looks
-			 * strange that we do addr->name
-			 * translation here.
-			 */
-			get_name(ap, afd, &cur->ai_next,
-				ap, pai, servname);
-		}
-
-		while (cur && cur->ai_next)
-			cur = cur->ai_next;
-	}
-
-	*res = sentinel.ai_next;
-	return 0;
-
-free:
-#ifdef USE_GETIPNODEBY
-	if (hp)
-		freehostent(hp);
-#endif
-	if (aplist)
-		free(aplist);
-	if (apbuf)
-		free(apbuf);
-	if (sentinel.ai_next)
-		freeaddrinfo(sentinel.ai_next);
-	return error;
-}
-
-/*
- * hostname == NULL.
- * passive socket -> anyaddr (0.0.0.0 or ::)
- * non-passive socket -> localhost (127.0.0.1 or ::1)
- */
-static int
-explore_null(pai, hostname, servname, res)
-	const struct addrinfo *pai;
-	const char *hostname;
-	const char *servname;
-	struct addrinfo **res;
-{
-	int s;
-	const struct afd *afd;
-	struct addrinfo *cur;
-	struct addrinfo sentinel;
-	int error;
-
-	*res = NULL;
-	sentinel.ai_next = NULL;
-	cur = &sentinel;
-
-	/*
-	 * filter out AFs that are not supported by the kernel
-	 * XXX errno?
-	 */
-	s = socket(pai->ai_family, SOCK_DGRAM, 0);
-	if (s < 0) {
-		if (errno != EMFILE)
-			return 0;
-	} else
-		close(s);
-
-	/*
-	 * if the servname does not match socktype/protocol, ignore it.
-	 */
-	if (get_portmatch(pai, servname) != 0)
-		return 0;
-
-	afd = find_afd(pai->ai_family);
-
-	if (pai->ai_flags & AI_PASSIVE) {
-		GET_AI(cur->ai_next, afd, afd->a_addrany);
-		/* xxx meaningless?
-		 * GET_CANONNAME(cur->ai_next, "anyaddr");
-		 */
-		GET_PORT(cur->ai_next, servname);
-	} else {
-		GET_AI(cur->ai_next, afd, afd->a_loopback);
-		/* xxx meaningless?
-		 * GET_CANONNAME(cur->ai_next, "localhost");
-		 */
-		GET_PORT(cur->ai_next, servname);
-	}
-	cur = cur->ai_next;
-
-	*res = sentinel.ai_next;
-	return 0;
-
-free:
-	if (sentinel.ai_next)
-		freeaddrinfo(sentinel.ai_next);
-	return error;
-}
-
-/*
- * numeric hostname
- */
-static int
-explore_numeric(pai, hostname, servname, res)
-	const struct addrinfo *pai;
-	const char *hostname;
-	const char *servname;
-	struct addrinfo **res;
-{
-	const struct afd *afd;
-	struct addrinfo *cur;
-	struct addrinfo sentinel;
-	int error;
-	char pton[PTON_MAX];
-	int flags;
-
-	*res = NULL;
-	sentinel.ai_next = NULL;
-	cur = &sentinel;
-
-	/*
-	 * if the servname does not match socktype/protocol, ignore it.
-	 */
-	if (get_portmatch(pai, servname) != 0)
-		return 0;
-
-	afd = find_afd(pai->ai_family);
-	flags = pai->ai_flags;
-
-	if (inet_pton(afd->a_af, hostname, pton) == 1) {
-		u_int32_t v4a;
-#ifdef INET6
-		u_char pfx;
-#endif
-
-		switch (afd->a_af) {
-		case AF_INET:
-			v4a = (u_int32_t)ntohl(((struct in_addr *)pton)->s_addr);
-			if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
-				flags &= ~AI_CANONNAME;
-			v4a >>= IN_CLASSA_NSHIFT;
-			if (v4a == 0 || v4a == IN_LOOPBACKNET)
-				flags &= ~AI_CANONNAME;
-			break;
-#ifdef INET6
-		case AF_INET6:
-			pfx = ((struct in6_addr *)pton)->s6_addr[0];
-			if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
-				flags &= ~AI_CANONNAME;
-			break;
-#endif
-		}
-
-		if (pai->ai_family == afd->a_af ||
-		    pai->ai_family == PF_UNSPEC /*?*/) {
-			if ((flags & AI_CANONNAME) == 0) {
-				GET_AI(cur->ai_next, afd, pton);
-				GET_PORT(cur->ai_next, servname);
-			} else {
-				/*
-				 * if AI_CANONNAME and if reverse lookup
-				 * fail, return ai anyway to pacify
-				 * calling application.
-				 *
-				 * XXX getaddrinfo() is a name->address
-				 * translation function, and it looks
-				 * strange that we do addr->name
-				 * translation here.
-				 */
-				get_name(pton, afd, &cur->ai_next,
-					pton, pai, servname);
-			}
-			while (cur && cur->ai_next)
-				cur = cur->ai_next;
-		} else
-			ERR(EAI_FAMILY);	/*xxx*/
-	}
-
-	*res = sentinel.ai_next;
-	return 0;
-
-free:
-bad:
-	if (sentinel.ai_next)
-		freeaddrinfo(sentinel.ai_next);
-	return error;
-}
-
-/*
- * numeric hostname with scope
- */
-static int
-explore_numeric_scope(pai, hostname, servname, res)
-	const struct addrinfo *pai;
-	const char *hostname;
-	const char *servname;
-	struct addrinfo **res;
-{
-#ifndef SCOPE_DELIMITER
-	return explore_numeric(pai, hostname, servname, res);
-#else
-	const struct afd *afd;
-	struct addrinfo *cur;
-	int error;
-	char *cp, *hostname2 = NULL;
-	int scope;
-	struct sockaddr_in6 *sin6;
-
-	/*
-	 * if the servname does not match socktype/protocol, ignore it.
-	 */
-	if (get_portmatch(pai, servname) != 0)
-		return 0;
-
-	afd = find_afd(pai->ai_family);
-	if (!afd->a_scoped)
-		return explore_numeric(pai, hostname, servname, res);
-
-	cp = strchr(hostname, SCOPE_DELIMITER);
-	if (cp == NULL)
-		return explore_numeric(pai, hostname, servname, res);
-
-	/*
-	 * Handle special case of <scoped_address><delimiter><scope id>
-	 */
-	hostname2 = strdup(hostname);
-	if (hostname2 == NULL)
-		return EAI_MEMORY;
-	/* terminate at the delimiter */
-	hostname2[cp - hostname] = '\0';
-
-	cp++;
-	switch (pai->ai_family) {
-#ifdef INET6
-	case AF_INET6:
-		scope = if_nametoindex(cp);
-		if (scope == 0) {
-			free(hostname2);
-			return (EAI_NONAME);
-		}
-		break;
-#endif
-	}
-
-	error = explore_numeric(pai, hostname2, servname, res);
-	if (error == 0) {
-		for (cur = *res; cur; cur = cur->ai_next) {
-			if (cur->ai_family != AF_INET6)
-				continue;
-			sin6 = (struct sockaddr_in6 *)cur->ai_addr;
-			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) ||
-			    IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr))
-				sin6->sin6_scope_id = scope;
-		}
-	}
-
-	free(hostname2);
-
-	return error;
-#endif
-}
-
-static int
-get_name(addr, afd, res, numaddr, pai, servname)
-	const char *addr;
-	const struct afd *afd;
-	struct addrinfo **res;
-	char *numaddr;
-	const struct addrinfo *pai;
-	const char *servname;
-{
-	struct hostent *hp = NULL;
-	struct addrinfo *cur = NULL;
-	int error = 0;
-	char *ap = NULL, *cn = NULL;
-#ifdef USE_GETIPNODEBY
-	int h_error;
-
-	hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error);
-#else
-	hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);
-#endif
-	if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
-#ifdef USE_GETIPNODEBY
-		GET_AI(cur, afd, hp->h_addr_list[0]);
-		GET_PORT(cur, servname);
-		GET_CANONNAME(cur, hp->h_name);
-#else
-		/* hp will be damaged if we use gethostbyaddr() */
-		if ((ap = (char *)malloc(hp->h_length)) == NULL) {
-			error = EAI_MEMORY;
-			goto free;
-		}
-		memcpy(ap, hp->h_addr_list[0], hp->h_length);
-		if ((cn = strdup(hp->h_name)) == NULL) {
-			error = EAI_MEMORY;
-			goto free;
-		}
-
-		GET_AI(cur, afd, ap);
-		GET_PORT(cur, servname);
-		GET_CANONNAME(cur, cn);
-		free(ap); ap = NULL;
-		free(cn); cn = NULL;
-#endif
-	} else {
-		GET_AI(cur, afd, numaddr);
-		GET_PORT(cur, servname);
-	}
-
-#ifdef USE_GETIPNODEBY
-	if (hp)
-		freehostent(hp);
-#endif
-	*res = cur;
-	return SUCCESS;
- free:
-	if (cur)
-		freeaddrinfo(cur);
-	if (ap)
-		free(ap);
-	if (cn)
-		free(cn);
-#ifdef USE_GETIPNODEBY
-	if (hp)
-		freehostent(hp);
-#endif
-	*res = NULL;
-	return error;
-}
-
-static int
-get_canonname(pai, ai, str)
-	const struct addrinfo *pai;
-	struct addrinfo *ai;
-	const char *str;
-{
-	if ((pai->ai_flags & AI_CANONNAME) != 0) {
-		ai->ai_canonname = (char *)malloc(strlen(str) + 1);
-		if (ai->ai_canonname == NULL)
-			return EAI_MEMORY;
-		strcpy(ai->ai_canonname, str);
-	}
-	return 0;
-}
-
-static struct addrinfo *
-get_ai(pai, afd, addr)
-	const struct addrinfo *pai;
-	const struct afd *afd;
-	const char *addr;
-{
-	char *p;
-	struct addrinfo *ai;
-
-	ai = (struct addrinfo *)malloc(sizeof(struct addrinfo)
-		+ (afd->a_socklen));
-	if (ai == NULL)
-		return NULL;
-
-	memcpy(ai, pai, sizeof(struct addrinfo));
-	ai->ai_addr = (struct sockaddr *)(ai + 1);
-	memset(ai->ai_addr, 0, afd->a_socklen);
-#ifdef HAVE_SOCKADDR_SA_LEN
-	ai->ai_addr->sa_len = afd->a_socklen;
-#endif
-	ai->ai_addrlen = afd->a_socklen;
-	ai->ai_addr->sa_family = ai->ai_family = afd->a_af;
-	p = (char *)(ai->ai_addr);
-	memcpy(p + afd->a_off, addr, afd->a_addrlen);
-	return ai;
-}
-
-static int
-get_portmatch(ai, servname)
-	const struct addrinfo *ai;
-	const char *servname;
-{
-
-	/* get_port does not touch first argument. when matchonly == 1. */
-	return get_port((struct addrinfo *)ai, servname, 1);
-}
-
-static int
-get_port(ai, servname, matchonly)
-	struct addrinfo *ai;
-	const char *servname;
-	int matchonly;
-{
-	const char *proto;
-	struct servent *sp;
-	int port;
-	int allownumeric;
-
-	if (servname == NULL)
-		return 0;
-	switch (ai->ai_family) {
-	case AF_INET:
-#ifdef AF_INET6
-	case AF_INET6:
-#endif
-		break;
-	default:
-		return 0;
-	}
-
-	switch (ai->ai_socktype) {
-	case SOCK_RAW:
-		return EAI_SERVICE;
-	case SOCK_DGRAM:
-	case SOCK_STREAM:
-		allownumeric = 1;
-		break;
-	case ANY:
-		allownumeric = 0;
-		break;
-	default:
-		return EAI_SOCKTYPE;
-	}
-
-	if (str_isnumber(servname)) {
-		if (!allownumeric)
-			return EAI_SERVICE;
-		port = htons(atoi(servname));
-		if (port < 0 || port > 65535)
-			return EAI_SERVICE;
-	} else {
-		switch (ai->ai_socktype) {
-		case SOCK_DGRAM:
-			proto = "udp";
-			break;
-		case SOCK_STREAM:
-			proto = "tcp";
-			break;
-		default:
-			proto = NULL;
-			break;
-		}
-
-		if ((sp = getservbyname(servname, proto)) == NULL)
-			return EAI_SERVICE;
-		port = sp->s_port;
-	}
-
-	if (!matchonly) {
-		switch (ai->ai_family) {
-		case AF_INET:
-			((struct sockaddr_in *)ai->ai_addr)->sin_port = port;
-			break;
-#ifdef INET6
-		case AF_INET6:
-			((struct sockaddr_in6 *)ai->ai_addr)->sin6_port = port;
-			break;
-#endif
-		}
-	}
-
-	return 0;
-}
-
-static const struct afd *
-find_afd(af)
-	int af;
-{
-	const struct afd *afd;
-
-	if (af == PF_UNSPEC)
-		return NULL;
-	for (afd = afdl; afd->a_af; afd++) {
-		if (afd->a_af == af)
-			return afd;
-	}
-	return NULL;
-}