/*
- * getaddrinfo(2) emulation.
- * Copyright (C) 1988, 1989, 1992, 1993 Free Software Foundation, Inc.
+ * 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[] =
+ "@(#) $Header: /opt/backups/cvs.m17n.org/root/starttls/Attic/getaddrinfo.c,v 1.2 2000-11-17 10:52:55 ueno 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_PORTABLE_PROTOTYPE
+#include "cdecl_ext.h"
+#endif
+
+#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 __P((const char *));
+static int explore_fqdn __P((const struct addrinfo *, const char *,
+ const char *, struct addrinfo **));
+static int explore_null __P((const struct addrinfo *, const char *,
+ const char *, struct addrinfo **));
+static int explore_numeric __P((const struct addrinfo *, const char *,
+ const char *, struct addrinfo **));
+static int explore_numeric_scope __P((const struct addrinfo *, const char *,
+ const char *, struct addrinfo **));
+static int get_name __P((const char *, const struct afd *, struct addrinfo **,
+ char *, const struct addrinfo *, const char *));
+static int get_canonname __P((const struct addrinfo *,
+ struct addrinfo *, const char *));
+static struct addrinfo *get_ai __P((const struct addrinfo *,
+ const struct afd *, const char *));
+static int get_portmatch __P((const struct addrinfo *, const char *));
+static int get_port __P((struct addrinfo *, const char *, int));
+static const struct afd *find_afd __P((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];
+}
- * Author: Daiki Ueno <daiki@kiss.kake.info.waseda.ac.jp>
+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(*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;
-This file is not part of any package.
+ if (hostname == NULL)
+ error = explore_null(pai, hostname, servname, &cur->ai_next);
+ else
+ error = explore_numeric_scope(pai, hostname, servname, &cur->ai_next);
-GNU Emacs is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+ if (error)
+ goto free;
-GNU Emacs is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
-You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.
+ /*
+ * 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;
-#ifndef HAVE_GETADDRINFO
+ *res = NULL;
+ sentinel.ai_next = NULL;
+ cur = &sentinel;
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <netinet/in.h>
+ /*
+ * 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;
-#ifdef HAVE_NETINET6_IN6_H
-# include <netinet6/in6.h>
-#endif /* HAVE_NETINET6_IN6_H */
+ 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);
+ }
-#include "getaddrinfo.h"
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
-int getaddrinfo (hostname, servname, hints, res)
- const char *hostname;
- const char *servname;
- const struct addrinfo *hints;
- struct addrinfo **res;
+ *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;
{
- struct hostent *host = NULL;
- struct servent *serv = NULL;
- struct protoent *proto;
- int port = 0;
-
-#if (defined (HAVE_SOCKADDR_IN6) && defined (INET6))
- struct sockaddr_in6 *sin =
- (struct sockaddr_in6 *) calloc (1, sizeof (struct sockaddr_in6));
-#else /* (defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
- struct sockaddr_in *sin =
- (struct sockaddr_in *) calloc (1, sizeof (struct sockaddr_in));
-#endif /* !(defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
-
- struct addrinfo *ai = *res =
- (struct addrinfo *) calloc (1, sizeof (struct addrinfo));
-
- if ((~ hints->ai_flags & AI_PASSIVE) && hostname &&
- (host = gethostbyname (hostname)) == NULL) {
- perror ("gethostbyname");
- return EAI_NONAME;
- }
-
- if (hints->ai_protocol &&
- (proto = getprotobynumber (hints->ai_protocol)) == NULL) {
- perror ("getprotobynumber");
- return EAI_NONAME;
- }
-
- if (servname)
- if (isdigit (servname[0]))
- port = atoi (servname);
- else {
- if ((serv = getservbyname (servname, proto->p_name)) == NULL) {
- perror ("getservbyname");
- return EAI_NONAME;
- }
- port = serv->s_port;
- }
-
-#if (defined (HAVE_SOCKADDR_IN6) && defined (INET6))
- if (host)
- memcpy (&sin->sin6_addr, host->h_addr, host->h_length);
- sin->sin6_port = htons (port);
-#else /* (defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
- if (host)
- memcpy (&sin->sin_addr, host->h_addr, host->h_length);
- sin->sin_port = htons (port);
-#endif /* !(defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
-
- if (hints->ai_family == AF_UNSPEC)
- ai->ai_family = host->h_addrtype;
- else
- ai->ai_family = hints->ai_family;
-#if (defined (HAVE_SOCKADDR_IN6) && defined (INET6))
- sin->sin6_family = ai->ai_family;
-#else /* (defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
- sin->sin_family = ai->ai_family;
-#endif /* !(defined (HAVE_SOCKADDR_IN6) && defined (INET6)) */
-
- ai->ai_protocol = hints->ai_protocol;
- ai->ai_socktype = hints->ai_socktype;
- ai->ai_addrlen = sizeof (*sin);
- ai->ai_addr = (struct sockaddr *)sin;
-
- return 0;
+ 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;
}
-void freeaddrinfo (ai)
- struct addrinfo *ai;
+/*
+ * numeric hostname
+ */
+static int
+explore_numeric(pai, hostname, servname, res)
+ const struct addrinfo *pai;
+ const char *hostname;
+ const char *servname;
+ struct addrinfo **res;
{
- struct addrinfo *p;
+ 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
- while (ai != NULL) {
- p = ai;
- ai = ai->ai_next;
- free (p);
- }
+ 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;
}
-#endif /* HAVE_GETADDRINFO */
+/*
+ * 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;
+}
projects / elisp / starttls.git / commitdiff