+++ /dev/null
-/*
- * 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 1.3 2002-01-22 08:33:28 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_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(*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;
-}
projects / elisp / starttls.git / commitdiff