--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/openenvcore/libc/src/net/getaddrinfo.c Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,2879 @@
+/* $KAME: getaddrinfo.c,v 1.15 2000/07/09 04:37:24 itojun Exp $ */
+
+/*
+ * 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.
+ *
+ * Portions Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
+ */
+
+/*
+ * "#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.
+ * - freeaddrinfo(NULL). RFC2553 is silent about it. XNET 5.2 says it is
+ * invalid. current code - SEGV on freeaddrinfo(NULL)
+ *
+ * Note:
+ * - 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?
+ * - (post-2553) semantics of AI_ADDRCONFIG itself is too vague.
+ * (1) what should we do against numeric hostname (2) what should we do
+ * against NULL hostname (3) what is AI_ADDRCONFIG itself. AF not ready?
+ * non-loopback address configured? global address configured?
+ *
+ * OS specific notes for netbsd/openbsd/freebsd4/bsdi4:
+ * - To avoid search order issue, we have a big amount of code duplicate
+ * from gethnamaddr.c and some other places. The issues that there's no
+ * lower layer function to lookup "IPv4 or IPv6" record. Calling
+ * gethostbyname2 from getaddrinfo will end up in wrong search order, as
+ * presented above.
+ *
+ * OS specific notes for freebsd4:
+ * - FreeBSD supported $GAI. The code does not.
+ * - FreeBSD allowed classful IPv4 numeric (127.1), the code does not.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/net/getaddrinfo.c,v 1.69.2.1 2005/07/22 20:17:30 ume Exp $");
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <sys/queue.h>
+#ifdef INET6
+#ifndef __SYMBIAN32__
+#include <net/if_var.h>
+#include <sys/sysctl.h>
+#endif //__SYMBIAN32__
+#include <sys/ioctl.h>
+#include <netinet6/in6_var.h> /* XXX */
+#endif
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#ifndef __SYMBIAN32__
+#include <rpc/rpc.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+#endif //__SYMBIAN32__
+#include <netdb.h>
+#include <resolv.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "res_config.h"
+
+#ifdef DEBUG
+#include "sys/syslog.h"
+#endif
+
+#include <stdarg.h>
+#include <nsswitch.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+
+#ifdef __SYMBIAN32__
+#if defined(__KAME__)
+#undef __KAME__
+#endif
+#endif
+
+#if defined(__KAME__) && defined(INET6)
+# define FAITH
+#endif
+
+#define SUCCESS 0
+#define ANY 0
+#define YES 1
+#define NO 0
+
+static const char in_addrany[] = { 0, 0, 0, 0 };
+static const char in_loopback[] = { 127, 0, 0, 1 };
+#ifdef INET6
+static const char in6_addrany[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+static const char in6_loopback[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
+};
+#endif
+
+struct policyqueue {
+ TAILQ_ENTRY(policyqueue) pc_entry;
+#ifdef INET6
+ struct in6_addrpolicy pc_policy;
+#endif
+};
+TAILQ_HEAD(policyhead, policyqueue);
+
+static const struct afd {
+ int a_af;
+ int a_addrlen;
+ socklen_t a_socklen;
+ int a_off;
+ const char *a_addrany;
+ const char *a_loopback;
+ int a_scoped;
+} afdl [] = {
+#ifdef INET6
+#define N_INET6 0
+ {PF_INET6, sizeof(struct in6_addr),
+ sizeof(struct sockaddr_in6),
+ offsetof(struct sockaddr_in6, sin6_addr),
+ in6_addrany, in6_loopback, 1},
+#define N_INET 1
+#else
+#define N_INET 0
+#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 },
+ { PF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 },
+ { PF_UNSPEC, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 },
+ { PF_UNSPEC, SOCK_RAW, ANY, NULL, 0x05 },
+ { -1, 0, 0, NULL, 0 },
+};
+
+#ifdef INET6
+#define PTON_MAX 16
+#else
+#define PTON_MAX 4
+#endif
+
+#define AIO_SRCFLAG_DEPRECATED 0x1
+
+struct ai_order {
+ union {
+ struct sockaddr_storage aiou_ss;
+ struct sockaddr aiou_sa;
+ } aio_src_un;
+#define aio_srcsa aio_src_un.aiou_sa
+ u_int32_t aio_srcflag;
+ int aio_srcscope;
+ int aio_dstscope;
+ struct policyqueue *aio_srcpolicy;
+ struct policyqueue *aio_dstpolicy;
+ struct addrinfo *aio_ai;
+ int aio_matchlen;
+};
+
+#ifndef __SYMBIAN32__
+static const ns_src default_dns_files[] = {
+ { NSSRC_FILES, NS_SUCCESS },
+ { NSSRC_DNS, NS_SUCCESS },
+ { 0 }
+};
+#endif//__SYMBIAN32__
+
+struct res_target {
+ struct res_target *next;
+ const char *name; /* domain name */
+ int qclass, qtype; /* class and type of query */
+ u_char *answer; /* buffer to put answer */
+ int anslen; /* size of answer buffer */
+ int n; /* result length */
+};
+
+#define MAXPACKET (64*1024)
+
+typedef union {
+ HEADER hdr;
+ u_char buf[MAXPACKET];
+} querybuf;
+
+static int str2number(const char *);
+static int explore_null(const struct addrinfo *,
+ const char *, struct addrinfo **);
+static int explore_numeric(const struct addrinfo *, const char *,
+ const char *, struct addrinfo **, const char *);
+static int explore_numeric_scope(const struct addrinfo *, const char *,
+ const char *, struct addrinfo **);
+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 int addrconfig(struct addrinfo *);
+static void set_source(struct ai_order *, struct policyhead *);
+static int comp_dst(const void *, const void *);
+#ifdef INET6
+static int ip6_str2scopeid(char *, struct sockaddr_in6 *, u_int32_t *);
+#endif
+static int gai_addr2scopetype(struct sockaddr *);
+#ifndef __SYMBIAN32__
+static int explore_fqdn(const struct addrinfo *, const char *,
+ const char *, struct addrinfo **);
+#endif //__SYMBIAN32__
+static int reorder(struct addrinfo *);
+static int get_addrselectpolicy(struct policyhead *);
+static void free_addrselectpolicy(struct policyhead *);
+static struct policyqueue *match_addrselectpolicy(struct sockaddr *,
+ struct policyhead *);
+static int matchlen(struct sockaddr *, struct sockaddr *);
+
+#ifndef __SYMBIAN32__
+static struct addrinfo *getanswer(const querybuf *, int, const char *, int,
+ const struct addrinfo *);
+#endif //__SYMBIAN32__
+
+#if defined(RESOLVSORT)
+static int addr4sort(struct addrinfo *);
+#endif
+#ifndef __SYMBIAN32__
+static int _dns_getaddrinfo(void *, void *, va_list);
+static void _sethtent(FILE **);
+static void _endhtent(FILE **);
+#endif /* __SYMBIAN32__ */
+#ifndef __SYMBIAN32__
+static struct addrinfo *_gethtent(FILE **, const char *,
+ const struct addrinfo *);
+static int _files_getaddrinfo(void *, void *, va_list);
+#endif // __SYMBIAN32__
+#ifdef YP
+static struct addrinfo *_yphostent(char *, const struct addrinfo *);
+static int _yp_getaddrinfo(void *, void *, va_list);
+#endif
+
+#ifndef __SYMBIAN32__
+static int res_queryN(const char *, struct res_target *);
+static int res_searchN(const char *, struct res_target *);
+static int res_querydomainN(const char *, const char *,
+ struct res_target *);
+#endif //__SYMBIAN32__
+#ifdef __SYMBIAN32__
+extern int getaddrinfo_private(const char*, const struct addrinfo*, struct addrinfo**);
+extern void freeaddrinfo_private(struct addrinfo*);
+static long int explore_hostname( struct addrinfo *, const char *,
+ const char *, struct addrinfo **, const struct addrinfo *);
+#endif
+/* 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 (/*CONSTCOND*/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 (/*CONSTCOND*/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 (/*CONSTCOND*/0)
+
+#define ERR(err) \
+do { \
+ /* external reference: error, and label bad */ \
+ error = (err); \
+ goto bad; \
+ /*NOTREACHED*/ \
+} while (/*CONSTCOND*/0)
+
+#define MATCH_FAMILY(x, y, w) \
+ ((x) == (y) || (/*CONSTCOND*/(w) && ((x) == PF_UNSPEC || (y) == PF_UNSPEC)))
+#define MATCH(x, y, w) \
+ ((x) == (y) || (/*CONSTCOND*/(w) && ((x) == ANY || (y) == ANY)))
+
+EXPORT_C void
+freeaddrinfo(ai)
+ struct addrinfo *ai;
+{
+ struct addrinfo *next;
+
+ if(ai == NULL)
+ {
+ return ;
+ }
+
+
+ do {
+ next = ai->ai_next;
+ if (ai->ai_canonname)
+ free(ai->ai_canonname);
+ /* no need to free(ai->ai_addr) */
+ free(ai);
+ ai = next;
+ } while (ai);
+}
+
+static int
+str2number(p)
+ const char *p;
+{
+ char *ep;
+ unsigned long v;
+
+ if (*p == '\0')
+ return -1;
+ ep = NULL;
+ errno = 0;
+ v = strtoul(p, &ep, 10);
+ if (errno == 0 && ep && *ep == '\0' && v <= UINT_MAX)
+ return v;
+ else
+ return -1;
+}
+
+EXPORT_C 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 explore *ex;
+ int numeric = 0;
+ memset(&sentinel, 0, sizeof(sentinel));
+ 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);
+ }
+ }
+ }
+ }
+
+ /*
+ * post-2553: AI_ALL and AI_V4MAPPED are effective only against
+ * AF_INET6 query. They need to be ignored if specified in other
+ * occassions.
+ */
+ switch (pai->ai_flags & (AI_ALL | AI_V4MAPPED)) {
+ case AI_V4MAPPED:
+ case AI_ALL | AI_V4MAPPED:
+ if (pai->ai_family != AF_INET6)
+ pai->ai_flags &= ~(AI_ALL | AI_V4MAPPED);
+ break;
+#ifndef __SYMBIAN32__
+ case AI_ALL:
+#if 1
+ /* illegal */
+ ERR(EAI_BADFLAGS);
+#else
+ pai->ai_flags &= ~(AI_ALL | AI_V4MAPPED);
+#endif
+ break;
+#endif /*__SYMBIAN32__*/
+ }
+
+ /*
+ * 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; /* backup *pai */
+
+ if (pai->ai_family == PF_UNSPEC) {
+#ifdef PF_INET6
+#ifdef __SYMBIAN32__
+// XXX: Fix this
+ pai->ai_family = PF_INET;
+#else
+ pai->ai_family = PF_INET6;
+#endif // __SYMBIAN32__
+#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;
+
+ /* PF_UNSPEC entries are prepared for DNS queries only */
+ if (ex->e_af == PF_UNSPEC)
+ continue;
+
+ 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, 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) {
+ numeric = 1;
+ goto good;
+ }
+
+ if (hostname == NULL)
+ ERR(EAI_NONAME); /* used to be EAI_NODATA */
+ if (pai->ai_flags & AI_NUMERICHOST)
+ ERR(EAI_NONAME);
+
+ if ((pai->ai_flags & AI_ADDRCONFIG) != 0 && !addrconfig(&ai0))
+ ERR(EAI_FAIL);
+
+ /*
+ * hostname as alphabetical name.
+ * we would like to prefer AF_INET6 than AF_INET, so we'll make a
+ * outer loop by AFs.
+ */
+ for (ex = explore; ex->e_af >= 0; ex++) {
+ *pai = ai0;
+
+ /* require exact match for family field */
+ if (pai->ai_family != ex->e_af)
+ 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;
+
+ }
+
+#ifdef __SYMBIAN32__
+ if (pai->ai_family == PF_UNSPEC)
+ pai->ai_family = ex->e_af;
+#endif
+ 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;
+
+#ifndef __SYMBIAN32__
+ error = explore_fqdn(pai, hostname, servname,
+ &cur->ai_next);
+#else
+
+ error = explore_hostname(pai, hostname, servname,
+ &cur->ai_next, hints);
+ if(error == -1 || error == EAI_MEMORY)
+ goto bad;
+ else
+ error = 0;
+
+
+#endif//__SYMBIAN32__
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+ /* XXX inhibit errors if we have the result */
+ if (sentinel.ai_next)
+ error = 0;
+
+good:
+ /*
+ * ensure we return either:
+ * - error == 0, non-NULL *res
+ * - error != 0, NULL *res
+ */
+ if (error == 0) {
+ if (sentinel.ai_next) {
+ /*
+ * If the returned entry is for an active connection,
+ * and the given name is not numeric, reorder the
+ * list, so that the application would try the list
+ * in the most efficient order.
+ */
+ if (hints == NULL || !(hints->ai_flags & AI_PASSIVE)) {
+ if (!numeric)
+ (void)reorder(&sentinel);
+ }
+ *res = sentinel.ai_next;
+ return SUCCESS;
+ } else
+ error = EAI_FAIL;
+ }
+free:
+bad:
+ if (sentinel.ai_next)
+ freeaddrinfo(sentinel.ai_next);
+ *res = NULL;
+ return error;
+}
+
+static int
+reorder(sentinel)
+ struct addrinfo *sentinel;
+{
+ struct addrinfo *ai, **aip;
+ struct ai_order *aio;
+ int i, n;
+ struct policyhead policyhead;
+
+ /* count the number of addrinfo elements for sorting. */
+ for (n = 0, ai = sentinel->ai_next; ai != NULL; ai = ai->ai_next, n++)
+ ;
+
+ /*
+ * If the number is small enough, we can skip the reordering process.
+ */
+ if (n <= 1)
+ return(n);
+
+ /* allocate a temporary array for sort and initialization of it. */
+ if ((aio = malloc(sizeof(*aio) * n)) == NULL)
+ return(n); /* give up reordering */
+ memset(aio, 0, sizeof(*aio) * n);
+
+ /* retrieve address selection policy from the kernel */
+ TAILQ_INIT(&policyhead);
+ if (!get_addrselectpolicy(&policyhead)) {
+ /* no policy is installed into kernel, we don't sort. */
+ free(aio);
+ return (n);
+ }
+
+ for (i = 0, ai = sentinel->ai_next; i < n; ai = ai->ai_next, i++) {
+ aio[i].aio_ai = ai;
+ aio[i].aio_dstscope = gai_addr2scopetype(ai->ai_addr);
+ aio[i].aio_dstpolicy = match_addrselectpolicy(ai->ai_addr,
+ &policyhead);
+ set_source(&aio[i], &policyhead);
+ }
+
+ /* perform sorting. */
+ qsort(aio, n, sizeof(*aio), comp_dst);
+
+ /* reorder the addrinfo chain. */
+ for (i = 0, aip = &sentinel->ai_next; i < n; i++) {
+ *aip = aio[i].aio_ai;
+ aip = &aio[i].aio_ai->ai_next;
+ }
+ *aip = NULL;
+
+ /* cleanup and return */
+ free(aio);
+ free_addrselectpolicy(&policyhead);
+ return(n);
+}
+
+static int
+get_addrselectpolicy(head)
+ struct policyhead *head;
+{
+#ifdef __SYMBIAN32__
+
+ head = head; /*to fix warning 'variable/argument not used in function' */
+#endif //__SYMBIAN32__
+
+#ifndef __SYMBIAN32__
+#ifdef INET6
+ int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_ADDRCTLPOLICY };
+ size_t l;
+ char *buf;
+ struct in6_addrpolicy *pol, *ep;
+
+ if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0)
+ return (0);
+ if ((buf = malloc(l)) == NULL)
+ return (0);
+ if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
+ free(buf);
+ return (0);
+ }
+
+ ep = (struct in6_addrpolicy *)(buf + l);
+ for (pol = (struct in6_addrpolicy *)buf; pol + 1 <= ep; pol++) {
+ struct policyqueue *new;
+
+ if ((new = malloc(sizeof(*new))) == NULL) {
+ free_addrselectpolicy(head); /* make the list empty */
+ break;
+ }
+ new->pc_policy = *pol;
+ TAILQ_INSERT_TAIL(head, new, pc_entry);
+ }
+
+ free(buf);
+ return (1);
+#else
+ return (0);
+#endif
+#else
+ return (0);
+#endif /* __SYMBIAN32__ */
+}
+
+static void
+free_addrselectpolicy(head)
+ struct policyhead *head;
+{
+ struct policyqueue *ent, *nent;
+
+ for (ent = TAILQ_FIRST(head); ent; ent = nent) {
+ nent = TAILQ_NEXT(ent, pc_entry);
+ TAILQ_REMOVE(head, ent, pc_entry);
+ free(ent);
+ }
+}
+
+static struct policyqueue *
+match_addrselectpolicy(addr, head)
+ struct sockaddr *addr;
+ struct policyhead *head;
+{
+#ifdef INET6
+ struct policyqueue *ent, *bestent = NULL;
+ struct in6_addrpolicy *pol;
+ int matchlen, bestmatchlen = -1;
+ u_char *mp, *ep, *k, *p, m;
+ struct sockaddr_in6 key;
+
+ switch(addr->sa_family) {
+ case AF_INET6:
+ key = *(struct sockaddr_in6 *)addr;
+ break;
+ case AF_INET:
+ /* convert the address into IPv4-mapped IPv6 address. */
+ memset(&key, 0, sizeof(key));
+ key.sin6_family = AF_INET6;
+ key.sin6_len = sizeof(key);
+ key.sin6_addr.s6_addr[10] = 0xff;
+ key.sin6_addr.s6_addr[11] = 0xff;
+ memcpy(&key.sin6_addr.s6_addr[12],
+ &((struct sockaddr_in *)addr)->sin_addr, 4);
+ break;
+ default:
+ return(NULL);
+ }
+
+ for (ent = TAILQ_FIRST(head); ent; ent = TAILQ_NEXT(ent, pc_entry)) {
+ pol = &ent->pc_policy;
+ matchlen = 0;
+
+ mp = (u_char *)&pol->addrmask.sin6_addr;
+ ep = mp + 16; /* XXX: scope field? */
+ k = (u_char *)&key.sin6_addr;
+ p = (u_char *)&pol->addr.sin6_addr;
+ for (; mp < ep && *mp; mp++, k++, p++) {
+ m = *mp;
+ if ((*k & m) != *p)
+ goto next; /* not match */
+ if (m == 0xff) /* short cut for a typical case */
+ matchlen += 8;
+ else {
+ while (m >= 0x80) {
+ matchlen++;
+ m <<= 1;
+ }
+ }
+ }
+
+ /* matched. check if this is better than the current best. */
+ if (matchlen > bestmatchlen) {
+ bestent = ent;
+ bestmatchlen = matchlen;
+ }
+
+ next:
+ continue;
+ }
+
+ return(bestent);
+#else
+ return(NULL);
+#endif
+
+}
+
+static void
+set_source(aio, ph)
+ struct ai_order *aio;
+ struct policyhead *ph;
+{
+ struct addrinfo ai = *aio->aio_ai;
+ struct sockaddr_storage ss;
+ socklen_t srclen;
+ int s;
+
+ /* set unspec ("no source is available"), just in case */
+ aio->aio_srcsa.sa_family = AF_UNSPEC;
+ aio->aio_srcscope = -1;
+
+ switch(ai.ai_family) {
+ case AF_INET:
+#ifdef INET6
+ case AF_INET6:
+#endif
+ break;
+ default: /* ignore unsupported AFs explicitly */
+ return;
+ }
+
+ /* XXX: make a dummy addrinfo to call connect() */
+ ai.ai_socktype = SOCK_DGRAM;
+ ai.ai_protocol = IPPROTO_UDP; /* is UDP too specific? */
+ ai.ai_next = NULL;
+ memset(&ss, 0, sizeof(ss));
+ memcpy(&ss, ai.ai_addr, ai.ai_addrlen);
+ ai.ai_addr = (struct sockaddr *)&ss;
+ get_port(&ai, "1", 0);
+
+ /* open a socket to get the source address for the given dst */
+#ifndef __SYMBIAN32__
+ if ((s = _socket(ai.ai_family, ai.ai_socktype, ai.ai_protocol)) < 0)
+ return; /* give up */
+ if (_connect(s, ai.ai_addr, ai.ai_addrlen) < 0)
+ goto cleanup;
+ srclen = ai.ai_addrlen;
+ if (_getsockname(s, &aio->aio_srcsa, &srclen) < 0) {
+ aio->aio_srcsa.sa_family = AF_UNSPEC;
+#else
+ if ((s = socket(ai.ai_family, ai.ai_socktype, ai.ai_protocol)) < 0)
+ return; /* give up */
+ if (connect(s, ai.ai_addr, ai.ai_addrlen) < 0)
+ goto cleanup;
+ srclen = ai.ai_addrlen;
+ if (getsockname(s, &aio->aio_srcsa, &srclen) < 0) {
+ aio->aio_srcsa.sa_family = AF_UNSPEC;
+#endif
+ goto cleanup;
+ }
+ aio->aio_srcscope = gai_addr2scopetype(&aio->aio_srcsa);
+ aio->aio_srcpolicy = match_addrselectpolicy(&aio->aio_srcsa, ph);
+ aio->aio_matchlen = matchlen(&aio->aio_srcsa, aio->aio_ai->ai_addr);
+#ifndef __SYMBIAN32__
+/*
+ * XXX:
+ * This path is not traversed
+ * get_addrselectpolicy() returns 0 and reorder() does
+ * not call this routine yet.
+ */
+#ifdef INET6
+ if (ai.ai_family == AF_INET6) {
+ struct in6_ifreq ifr6;
+ u_int32_t flags6;
+
+ /* XXX: interface name should not be hardcoded */
+ strncpy(ifr6.ifr_name, "lo0", sizeof(ifr6.ifr_name));
+ memset(&ifr6, 0, sizeof(ifr6));
+ memcpy(&ifr6.ifr_addr, ai.ai_addr, ai.ai_addrlen);
+#ifdef __SYMBIAN32__
+ if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) == 0) {
+#else
+ if (_ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) == 0) {
+#endif //__SYMBIAN32__
+ flags6 = ifr6.ifr_ifru.ifru_flags6;
+ if ((flags6 & IN6_IFF_DEPRECATED))
+ aio->aio_srcflag |= AIO_SRCFLAG_DEPRECATED;
+ }
+ }
+#endif
+#endif
+
+ cleanup:
+#ifndef __SYMBIAN32__
+ _close(s);
+#else
+ close(s);
+#endif /* __SYMBIAN32__ */
+ return;
+}
+
+static int
+matchlen(src, dst)
+ struct sockaddr *src, *dst;
+{
+ int match = 0;
+ u_char *s, *d;
+ u_char *lim, r;
+ int addrlen;
+
+ switch (src->sa_family) {
+#ifdef INET6
+ case AF_INET6:
+ s = (u_char *)&((struct sockaddr_in6 *)src)->sin6_addr;
+ d = (u_char *)&((struct sockaddr_in6 *)dst)->sin6_addr;
+ addrlen = sizeof(struct in6_addr);
+ lim = s + addrlen;
+ break;
+#endif
+ case AF_INET:
+ s = (u_char *)&((struct sockaddr_in *)src)->sin_addr;
+ d = (u_char *)&((struct sockaddr_in *)dst)->sin_addr;
+ addrlen = sizeof(struct in_addr);
+ lim = s + addrlen;
+ break;
+ default:
+ return(0);
+ }
+
+ while (s < lim)
+ if ((r = (*d++ ^ *s++)) != 0) {
+ while (r < addrlen * 8) {
+ match++;
+ r <<= 1;
+ }
+ break;
+ } else
+ match += 8;
+ return(match);
+}
+
+static int
+comp_dst(arg1, arg2)
+ const void *arg1, *arg2;
+{
+ const struct ai_order *dst1 = arg1, *dst2 = arg2;
+
+ /*
+ * Rule 1: Avoid unusable destinations.
+ * XXX: we currently do not consider if an appropriate route exists.
+ */
+ if (dst1->aio_srcsa.sa_family != AF_UNSPEC &&
+ dst2->aio_srcsa.sa_family == AF_UNSPEC) {
+ return(-1);
+ }
+ if (dst1->aio_srcsa.sa_family == AF_UNSPEC &&
+ dst2->aio_srcsa.sa_family != AF_UNSPEC) {
+ return(1);
+ }
+
+ /* Rule 2: Prefer matching scope. */
+ if (dst1->aio_dstscope == dst1->aio_srcscope &&
+ dst2->aio_dstscope != dst2->aio_srcscope) {
+ return(-1);
+ }
+ if (dst1->aio_dstscope != dst1->aio_srcscope &&
+ dst2->aio_dstscope == dst2->aio_srcscope) {
+ return(1);
+ }
+
+ /* Rule 3: Avoid deprecated addresses. */
+ if (dst1->aio_srcsa.sa_family != AF_UNSPEC &&
+ dst2->aio_srcsa.sa_family != AF_UNSPEC) {
+ if (!(dst1->aio_srcflag & AIO_SRCFLAG_DEPRECATED) &&
+ (dst2->aio_srcflag & AIO_SRCFLAG_DEPRECATED)) {
+ return(-1);
+ }
+ if ((dst1->aio_srcflag & AIO_SRCFLAG_DEPRECATED) &&
+ !(dst2->aio_srcflag & AIO_SRCFLAG_DEPRECATED)) {
+ return(1);
+ }
+ }
+
+ /* Rule 4: Prefer home addresses. */
+ /* XXX: not implemented yet */
+
+ /* Rule 5: Prefer matching label. */
+#ifdef INET6
+ if (dst1->aio_srcpolicy && dst1->aio_dstpolicy &&
+ dst1->aio_srcpolicy->pc_policy.label ==
+ dst1->aio_dstpolicy->pc_policy.label &&
+ (dst2->aio_srcpolicy == NULL || dst2->aio_dstpolicy == NULL ||
+ dst2->aio_srcpolicy->pc_policy.label !=
+ dst2->aio_dstpolicy->pc_policy.label)) {
+ return(-1);
+ }
+ if (dst2->aio_srcpolicy && dst2->aio_dstpolicy &&
+ dst2->aio_srcpolicy->pc_policy.label ==
+ dst2->aio_dstpolicy->pc_policy.label &&
+ (dst1->aio_srcpolicy == NULL || dst1->aio_dstpolicy == NULL ||
+ dst1->aio_srcpolicy->pc_policy.label !=
+ dst1->aio_dstpolicy->pc_policy.label)) {
+ return(1);
+ }
+#endif
+
+ /* Rule 6: Prefer higher precedence. */
+#ifdef INET6
+ if (dst1->aio_dstpolicy &&
+ (dst2->aio_dstpolicy == NULL ||
+ dst1->aio_dstpolicy->pc_policy.preced >
+ dst2->aio_dstpolicy->pc_policy.preced)) {
+ return(-1);
+ }
+ if (dst2->aio_dstpolicy &&
+ (dst1->aio_dstpolicy == NULL ||
+ dst2->aio_dstpolicy->pc_policy.preced >
+ dst1->aio_dstpolicy->pc_policy.preced)) {
+ return(1);
+ }
+#endif
+
+ /* Rule 7: Prefer native transport. */
+ /* XXX: not implemented yet */
+
+ /* Rule 8: Prefer smaller scope. */
+ if (dst1->aio_dstscope >= 0 &&
+ dst1->aio_dstscope < dst2->aio_dstscope) {
+ return(-1);
+ }
+ if (dst2->aio_dstscope >= 0 &&
+ dst2->aio_dstscope < dst1->aio_dstscope) {
+ return(1);
+ }
+
+ /*
+ * Rule 9: Use longest matching prefix.
+ * We compare the match length in a same AF only.
+ */
+ if (dst1->aio_ai->ai_addr->sa_family ==
+ dst2->aio_ai->ai_addr->sa_family) {
+ if (dst1->aio_matchlen > dst2->aio_matchlen) {
+ return(-1);
+ }
+ if (dst1->aio_matchlen < dst2->aio_matchlen) {
+ return(1);
+ }
+ }
+
+ /* Rule 10: Otherwise, leave the order unchanged. */
+ return(-1);
+}
+
+/*
+ * Copy from scope.c.
+ * XXX: we should standardize the functions and link them as standard
+ * library.
+ */
+static int
+gai_addr2scopetype(sa)
+ struct sockaddr *sa;
+{
+#ifdef INET6
+ struct sockaddr_in6 *sa6;
+#endif
+ struct sockaddr_in *sa4;
+
+ switch(sa->sa_family) {
+#ifdef INET6
+ case AF_INET6:
+ sa6 = (struct sockaddr_in6 *)sa;
+ if (IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)) {
+ /* just use the scope field of the multicast address */
+ return(sa6->sin6_addr.s6_addr[2] & 0x0f);
+ }
+ /*
+ * Unicast addresses: map scope type to corresponding scope
+ * value defined for multcast addresses.
+ * XXX: hardcoded scope type values are bad...
+ */
+ if (IN6_IS_ADDR_LOOPBACK(&sa6->sin6_addr))
+ return(1); /* node local scope */
+ if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr))
+ return(2); /* link-local scope */
+ if (IN6_IS_ADDR_SITELOCAL(&sa6->sin6_addr))
+ return(5); /* site-local scope */
+ return(14); /* global scope */
+ break;
+#endif
+ case AF_INET:
+ /*
+ * IPv4 pseudo scoping according to RFC 3484.
+ */
+ sa4 = (struct sockaddr_in *)sa;
+ /* IPv4 autoconfiguration addresses have link-local scope. */
+ if (((u_char *)&sa4->sin_addr)[0] == 169 &&
+ ((u_char *)&sa4->sin_addr)[1] == 254)
+ return(2);
+ /* Private addresses have site-local scope. */
+ if (((u_char *)&sa4->sin_addr)[0] == 10 ||
+ (((u_char *)&sa4->sin_addr)[0] == 172 &&
+ (((u_char *)&sa4->sin_addr)[1] & 0xf0) == 16) ||
+ (((u_char *)&sa4->sin_addr)[0] == 192 &&
+ ((u_char *)&sa4->sin_addr)[1] == 168))
+ return(14); /* XXX: It should be 5 unless NAT */
+ /* Loopback addresses have link-local scope. */
+ if (((u_char *)&sa4->sin_addr)[0] == 127)
+ return(2);
+ return(14);
+ break;
+ default:
+ errno = EAFNOSUPPORT; /* is this a good error? */
+ return(-1);
+ }
+}
+
+/*
+ * 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, servname, res)
+ const struct addrinfo *pai;
+ 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?
+ */
+#ifndef __SYMBIAN32__
+ s = _socket(pai->ai_family, SOCK_DGRAM, 0);
+#else
+ s=socket(pai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+#endif /* __SYMBIAN32__ */
+ if (s < 0) {
+ if (errno != EMFILE)
+ return 0;
+ } else
+#ifndef __SYMBIAN32__
+ _close(s);
+#else
+ close(s);
+#endif /*__SYMBIAN32__*/
+ /*
+ * 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 == NULL)
+ return 0;
+
+ 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, canonname)
+ const struct addrinfo *pai;
+ const char *hostname;
+ const char *servname;
+ struct addrinfo **res;
+ const char *canonname;
+{
+ const struct afd *afd;
+ struct addrinfo *cur;
+ struct addrinfo sentinel;
+ int error;
+ char pton[PTON_MAX];
+
+ *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);
+ if (afd == NULL)
+ return 0;
+
+ switch (afd->a_af) {
+#if 1 /*X/Open spec*/
+ case AF_INET:
+ if (inet_aton(hostname, (struct in_addr *)pton) == 1) {
+ if (pai->ai_family == afd->a_af ||
+ pai->ai_family == PF_UNSPEC /*?*/) {
+ GET_AI(cur->ai_next, afd, pton);
+ GET_PORT(cur->ai_next, servname);
+ if ((pai->ai_flags & AI_CANONNAME)) {
+ /*
+ * Set the numeric address itself as
+ * the canonical name, based on a
+ * clarification in rfc3493.
+ */
+ GET_CANONNAME(cur->ai_next, canonname);
+ }
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ } else
+ ERR(EAI_FAMILY); /*xxx*/
+ }
+ break;
+#endif
+ default:
+ if (inet_pton(afd->a_af, hostname, pton) == 1) {
+ if (pai->ai_family == afd->a_af ||
+ pai->ai_family == PF_UNSPEC /*?*/) {
+ GET_AI(cur->ai_next, afd, pton);
+ GET_PORT(cur->ai_next, servname);
+ if ((pai->ai_flags & AI_CANONNAME)) {
+ /*
+ * Set the numeric address itself as
+ * the canonical name, based on a
+ * clarification in rfc3493.
+ */
+ GET_CANONNAME(cur->ai_next, canonname);
+ }
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ } else
+ ERR(EAI_FAMILY); /* XXX */
+ }
+ break;
+ }
+
+ *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;
+{
+#if !defined(SCOPE_DELIMITER) || !defined(INET6)
+ return explore_numeric(pai, hostname, servname, res, hostname);
+#else
+ const struct afd *afd;
+ struct addrinfo *cur;
+ int error;
+ char *cp, *hostname2 = NULL, *scope, *addr;
+ 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 == NULL)
+ return 0;
+
+ if (!afd->a_scoped)
+ return explore_numeric(pai, hostname, servname, res, hostname);
+
+ cp = strchr(hostname, SCOPE_DELIMITER);
+ if (cp == NULL)
+ return explore_numeric(pai, hostname, servname, res, hostname);
+
+ /*
+ * 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';
+ addr = hostname2;
+ scope = cp + 1;
+
+ error = explore_numeric(pai, addr, servname, res, hostname);
+ if (error == 0) {
+ u_int32_t scopeid;
+
+ for (cur = *res; cur; cur = cur->ai_next) {
+ if (cur->ai_family != AF_INET6)
+ continue;
+ sin6 = (struct sockaddr_in6 *)(void *)cur->ai_addr;
+ if (ip6_str2scopeid(scope, sin6, &scopeid) == -1) {
+ free(hostname2);
+ return(EAI_NONAME); /* XXX: is return OK? */
+ }
+ sin6->sin6_scope_id = scopeid;
+ }
+ }
+
+ free(hostname2);
+
+ return error;
+#endif
+}
+
+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 = strdup(str);
+ if (ai->ai_canonname == NULL)
+ return EAI_MEMORY;
+ }
+ 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;
+#ifdef FAITH
+ struct in6_addr faith_prefix;
+ char *fp_str;
+ int translate = 0;
+#endif
+
+#ifdef FAITH
+ /*
+ * Transfrom an IPv4 addr into a special IPv6 addr format for
+ * IPv6->IPv4 translation gateway. (only TCP is supported now)
+ *
+ * +-----------------------------------+------------+
+ * | faith prefix part (12 bytes) | embedded |
+ * | | IPv4 addr part (4 bytes)
+ * +-----------------------------------+------------+
+ *
+ * faith prefix part is specified as ascii IPv6 addr format
+ * in environmental variable GAI.
+ * For FAITH to work correctly, routing to faith prefix must be
+ * setup toward a machine where a FAITH daemon operates.
+ * Also, the machine must enable some mechanizm
+ * (e.g. faith interface hack) to divert those packet with
+ * faith prefixed destination addr to user-land FAITH daemon.
+ */
+ fp_str = getenv("GAI");
+ if (fp_str && inet_pton(AF_INET6, fp_str, &faith_prefix) == 1 &&
+ afd->a_af == AF_INET && pai->ai_socktype == SOCK_STREAM) {
+ u_int32_t v4a;
+ u_int8_t v4a_top;
+
+ memcpy(&v4a, addr, sizeof v4a);
+ v4a_top = v4a >> IN_CLASSA_NSHIFT;
+ if (!IN_MULTICAST(v4a) && !IN_EXPERIMENTAL(v4a) &&
+ v4a_top != 0 && v4a != IN_LOOPBACKNET) {
+ afd = &afdl[N_INET6];
+ memcpy(&faith_prefix.s6_addr[12], addr,
+ sizeof(struct in_addr));
+ translate = 1;
+ }
+ }
+#endif
+
+ 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 *)(void *)(ai + 1);
+ memset(ai->ai_addr, 0, (size_t)afd->a_socklen);
+#ifndef __SYMBIAN32__
+ ai->ai_addr->sa_len = afd->a_socklen;
+#endif /* __SYMBIAN32__ */
+ ai->ai_addrlen = afd->a_socklen;
+#ifndef __SYMBIAN32__
+ ai->ai_addr->sa_family = ai->ai_family = afd->a_af;
+#endif
+ p = (char *)(void *)(ai->ai_addr);
+#ifdef FAITH
+ if (translate == 1)
+ memcpy(p + afd->a_off, &faith_prefix, (size_t)afd->a_addrlen);
+ else
+#endif
+ memcpy(p + afd->a_off, addr, (size_t)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. */
+ /* LINTED const cast */
+ 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;
+ }
+
+ port = str2number(servname);
+ if (port >= 0) {
+ if (!allownumeric)
+ return EAI_SERVICE;
+ if (port < 0 || port > 65535)
+ return EAI_SERVICE;
+ port = htons(port);
+ } else {
+ if (ai->ai_flags & AI_NUMERICSERV)
+ return EAI_NONAME;
+ 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 *)(void *)
+ ai->ai_addr)->sin_port = port;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ ((struct sockaddr_in6 *)(void *)
+ 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;
+}
+
+/*
+ * post-2553: AI_ADDRCONFIG check. if we use getipnodeby* as backend, backend
+ * will take care of it.
+ * the semantics of AI_ADDRCONFIG is not defined well. we are not sure
+ * if the code is right or not.
+ *
+ * XXX PF_UNSPEC -> PF_INET6 + PF_INET mapping needs to be in sync with
+ * _dns_getaddrinfo.
+ */
+static int
+addrconfig(pai)
+ struct addrinfo *pai;
+{
+ int s, af;
+
+ /*
+ * TODO:
+ * Note that implementation dependent test for address
+ * configuration should be done everytime called
+ * (or apropriate interval),
+ * because addresses will be dynamically assigned or deleted.
+ */
+ af = pai->ai_family;
+ if (af == AF_UNSPEC) {
+#ifndef __SYMBIAN32__
+ if ((s = _socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
+ af = AF_INET;
+ else {
+ _close(s);
+ if ((s = _socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ af = AF_INET6;
+ else
+ _close(s);
+ }
+#else
+ if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ af = AF_INET;
+ else {
+ close(s);
+ if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ af = AF_INET6;
+ else
+ close(s);
+ }
+#endif /*__SYMBIAN32__*/
+ }
+ if (af != AF_UNSPEC) {
+#ifndef __SYMBIAN32__
+ if ((s = _socket(af, SOCK_DGRAM, 0)) < 0)
+ return 0;
+ _close(s);
+#else
+ if ((s = socket(af, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ return 0;
+ close(s);
+#endif /*__SYMBIAN32__*/
+ }
+ pai->ai_family = af;
+ return 1;
+}
+
+#ifdef INET6
+/* convert a string to a scope identifier. XXX: IPv6 specific */
+static int
+ip6_str2scopeid(scope, sin6, scopeid)
+ char *scope;
+ struct sockaddr_in6 *sin6;
+ u_int32_t *scopeid;
+{
+ u_long lscopeid;
+ struct in6_addr *a6;
+ char *ep;
+
+ a6 = &sin6->sin6_addr;
+
+ /* empty scopeid portion is invalid */
+ if (*scope == '\0')
+ return -1;
+
+ if (IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) {
+ /*
+ * We currently assume a one-to-one mapping between links
+ * and interfaces, so we simply use interface indices for
+ * like-local scopes.
+ */
+ *scopeid = if_nametoindex(scope);
+ if (*scopeid == 0)
+ goto trynumeric;
+ return 0;
+ }
+
+ /* still unclear about literal, allow numeric only - placeholder */
+ if (IN6_IS_ADDR_SITELOCAL(a6) || IN6_IS_ADDR_MC_SITELOCAL(a6))
+ goto trynumeric;
+ if (IN6_IS_ADDR_MC_ORGLOCAL(a6))
+ goto trynumeric;
+ else
+ goto trynumeric; /* global */
+
+ /* try to convert to a numeric id as a last resort */
+ trynumeric:
+ errno = 0;
+ lscopeid = strtoul(scope, &ep, 10);
+ *scopeid = (u_int32_t)(lscopeid & 0xffffffffUL);
+ if (errno == 0 && ep && *ep == '\0' && *scopeid == lscopeid)
+ return 0;
+ else
+ return -1;
+}
+#endif
+
+/*
+ * FQDN hostname, DNS lookup
+ */
+#ifndef __SYMBIAN32__
+static int
+explore_fqdn(pai, hostname, servname, res)
+ const struct addrinfo *pai;
+ const char *hostname;
+ const char *servname;
+ struct addrinfo **res;
+{
+ struct addrinfo *result;
+ struct addrinfo *cur;
+ int error = 0;
+ static const ns_dtab dtab[] = {
+ NS_FILES_CB(_files_getaddrinfo, NULL)
+ { NSSRC_DNS, _dns_getaddrinfo, NULL }, /* force -DHESIOD */
+ NS_NIS_CB(_yp_getaddrinfo, NULL)
+ { 0 }
+ };
+
+ result = NULL;
+
+ /*
+ * if the servname does not match socktype/protocol, ignore it.
+ */
+ if (get_portmatch(pai, servname) != 0)
+ return 0;
+
+ switch (_nsdispatch(&result, dtab, NSDB_HOSTS, "getaddrinfo",
+ default_dns_files, hostname, pai)) {
+ case NS_TRYAGAIN:
+ error = EAI_AGAIN;
+ goto free;
+ case NS_UNAVAIL:
+ error = EAI_FAIL;
+ goto free;
+ case NS_NOTFOUND:
+ error = EAI_NONAME;
+ goto free;
+ case NS_SUCCESS:
+ error = 0;
+ for (cur = result; cur; cur = cur->ai_next) {
+ GET_PORT(cur, servname);
+ /* canonname should be filled already */
+ }
+ break;
+ }
+
+ *res = result;
+
+ return 0;
+
+free:
+ if (result)
+ freeaddrinfo(result);
+ return error;
+}
+#endif
+#ifdef DEBUG
+static const char AskedForGot[] =
+ "gethostby*.getanswer: asked for \"%s\", got \"%s\"";
+#endif
+
+#ifndef __SYMBIAN32__
+static struct addrinfo *
+getanswer(answer, anslen, qname, qtype, pai)
+ const querybuf *answer;
+ int anslen;
+ const char *qname;
+ int qtype;
+ const struct addrinfo *pai;
+{
+ struct addrinfo sentinel, *cur;
+ struct addrinfo ai;
+ const struct afd *afd;
+ char *canonname;
+ const HEADER *hp;
+ const u_char *cp;
+ int n;
+ const u_char *eom;
+ char *bp, *ep;
+ int type, class, ancount, qdcount;
+ int haveanswer, had_error;
+ char tbuf[MAXDNAME];
+ int (*name_ok)(const char *);
+ char hostbuf[8*1024];
+
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ canonname = NULL;
+ eom = answer->buf + anslen;
+ switch (qtype) {
+ case T_A:
+ case T_AAAA:
+ case T_ANY: /*use T_ANY only for T_A/T_AAAA lookup*/
+ name_ok = res_hnok;
+ break;
+ default:
+ return (NULL); /* XXX should be abort(); */
+ }
+ /*
+ * find first satisfactory answer
+ */
+ hp = &answer->hdr;
+ ancount = ntohs(hp->ancount);
+ qdcount = ntohs(hp->qdcount);
+ bp = hostbuf;
+ ep = hostbuf + sizeof hostbuf;
+ cp = answer->buf + HFIXEDSZ;
+ if (qdcount != 1) {
+ h_errno = NO_RECOVERY;
+ return (NULL);
+ }
+ n = dn_expand(answer->buf, eom, cp, bp, ep - bp);
+ if ((n < 0) || !(*name_ok)(bp)) {
+ h_errno = NO_RECOVERY;
+ return (NULL);
+ }
+ cp += n + QFIXEDSZ;
+ if (qtype == T_A || qtype == T_AAAA || qtype == T_ANY) {
+ /* res_send() has already verified that the query name is the
+ * same as the one we sent; this just gets the expanded name
+ * (i.e., with the succeeding search-domain tacked on).
+ */
+ n = strlen(bp) + 1; /* for the \0 */
+ if (n >= MAXHOSTNAMELEN) {
+ h_errno = NO_RECOVERY;
+ return (NULL);
+ }
+ canonname = bp;
+ bp += n;
+ /* The qname can be abbreviated, but h_name is now absolute. */
+ qname = canonname;
+ }
+ haveanswer = 0;
+ had_error = 0;
+ while (ancount-- > 0 && cp < eom && !had_error) {
+ n = dn_expand(answer->buf, eom, cp, bp, ep - bp);
+ if ((n < 0) || !(*name_ok)(bp)) {
+ had_error++;
+ continue;
+ }
+ cp += n; /* name */
+ type = _getshort(cp);
+ cp += INT16SZ; /* type */
+ class = _getshort(cp);
+ cp += INT16SZ + INT32SZ; /* class, TTL */
+ n = _getshort(cp);
+ cp += INT16SZ; /* len */
+ if (class != C_IN) {
+ /* XXX - debug? syslog? */
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ if ((qtype == T_A || qtype == T_AAAA || qtype == T_ANY) &&
+ type == T_CNAME) {
+ n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
+ if ((n < 0) || !(*name_ok)(tbuf)) {
+ had_error++;
+ continue;
+ }
+ cp += n;
+ /* Get canonical name. */
+ n = strlen(tbuf) + 1; /* for the \0 */
+ if (n > ep - bp || n >= MAXHOSTNAMELEN) {
+ had_error++;
+ continue;
+ }
+ strlcpy(bp, tbuf, ep - bp);
+ canonname = bp;
+ bp += n;
+ continue;
+ }
+ if (qtype == T_ANY) {
+ if (!(type == T_A || type == T_AAAA)) {
+ cp += n;
+ continue;
+ }
+ } else if (type != qtype) {
+#ifdef DEBUG
+ if (type != T_KEY && type != T_SIG)
+#ifndef __SYMBIAN32__
+ syslog(LOG_NOTICE|LOG_AUTH,
+ "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
+ qname, p_class(C_IN), p_type(qtype),
+ p_type(type));
+#endif/* __SYMBIAN32__ */
+#endif/* DEBUG */
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ switch (type) {
+ case T_A:
+ case T_AAAA:
+ if (strcasecmp(canonname, bp) != 0) {
+#ifdef DEBUG
+#ifndef __SYMBIAN32__
+ syslog(LOG_NOTICE|LOG_AUTH,
+ AskedForGot,canonname, bp);
+#endif/* __SYMBIAN32__ */
+#endif/* DEBUG */
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ if (type == T_A && n != INADDRSZ) {
+ cp += n;
+ continue;
+ }
+ if (type == T_AAAA && n != IN6ADDRSZ) {
+ cp += n;
+ continue;
+ }
+#ifdef FILTER_V4MAPPED
+ if (type == T_AAAA) {
+ struct in6_addr in6;
+ memcpy(&in6, cp, sizeof(in6));
+ if (IN6_IS_ADDR_V4MAPPED(&in6)) {
+ cp += n;
+ continue;
+ }
+ }
+#endif
+ if (!haveanswer) {
+ int nn;
+
+ canonname = bp;
+ nn = strlen(bp) + 1; /* for the \0 */
+ bp += nn;
+ }
+
+ /* don't overwrite pai */
+ ai = *pai;
+ ai.ai_family = (type == T_A) ? AF_INET : AF_INET6;
+ afd = find_afd(ai.ai_family);
+ if (afd == NULL) {
+ cp += n;
+ continue;
+ }
+ cur->ai_next = get_ai(&ai, afd, (const char *)cp);
+ if (cur->ai_next == NULL)
+ had_error++;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ cp += n;
+ break;
+ default:
+ abort();
+ }
+ if (!had_error)
+ haveanswer++;
+ }
+ if (haveanswer) {
+#if defined(RESOLVSORT)
+ /*
+ * We support only IPv4 address for backward
+ * compatibility against gethostbyname(3).
+ */
+ if (_res.nsort && qtype == T_A) {
+ if (addr4sort(&sentinel) < 0) {
+ freeaddrinfo(sentinel.ai_next);
+ h_errno = NO_RECOVERY;
+ return NULL;
+ }
+ }
+#endif /*RESOLVSORT*/
+ if (!canonname)
+ (void)get_canonname(pai, sentinel.ai_next, qname);
+ else
+ (void)get_canonname(pai, sentinel.ai_next, canonname);
+ h_errno = NETDB_SUCCESS;
+ return sentinel.ai_next;
+ }
+
+ h_errno = NO_RECOVERY;
+ return NULL;
+}
+#endif /* __SYMBIAN32__ */
+
+
+#ifdef RESOLVSORT
+#ifndef __SYMBIAN32__
+
+struct addr_ptr {
+ struct addrinfo *ai;
+ int aval;
+};
+
+static int
+addr4sort(struct addrinfo *sentinel)
+{
+ struct addrinfo *ai;
+ struct addr_ptr *addrs, addr;
+ struct sockaddr_in *sin;
+ int naddrs, i, j;
+ int needsort = 0;
+
+ if (!sentinel)
+ return -1;
+ naddrs = 0;
+ for (ai = sentinel->ai_next; ai; ai = ai->ai_next)
+ naddrs++;
+ if (naddrs < 2)
+ return 0; /* We don't need sorting. */
+ if ((addrs = malloc(sizeof(struct addr_ptr) * naddrs)) == NULL)
+ return -1;
+ i = 0;
+ for (ai = sentinel->ai_next; ai; ai = ai->ai_next) {
+ sin = (struct sockaddr_in *)ai->ai_addr;
+ for (j = 0; (unsigned)j < _res.nsort; j++) {
+ if (_res.sort_list[j].addr.s_addr ==
+ (sin->sin_addr.s_addr & _res.sort_list[j].mask))
+ break;
+ }
+ addrs[i].ai = ai;
+ addrs[i].aval = j;
+ if (needsort == 0 && i > 0 && j < addrs[i - 1].aval)
+ needsort = i;
+ i++;
+ }
+ if (!needsort) {
+ free(addrs);
+ return 0;
+ }
+
+ while (needsort < naddrs) {
+ for (j = needsort - 1; j >= 0; j--) {
+ if (addrs[j].aval > addrs[j+1].aval) {
+ addr = addrs[j];
+ addrs[j] = addrs[j + 1];
+ addrs[j + 1] = addr;
+ } else
+ break;
+ }
+ needsort++;
+ }
+
+ ai = sentinel;
+ for (i = 0; i < naddrs; ++i) {
+ ai->ai_next = addrs[i].ai;
+ ai = ai->ai_next;
+ }
+ ai->ai_next = NULL;
+ free(addrs);
+ return 0;
+}
+#endif /*RESOLVSORT*/
+#endif /*__SYMBIAN32__*/
+
+/*ARGSUSED*/
+
+#ifndef __SYMBIAN32__
+static int
+_dns_getaddrinfo(rv, cb_data, ap)
+ void *rv;
+ void *cb_data;
+ va_list ap;
+{
+ struct addrinfo *ai;
+ querybuf *buf, *buf2;
+ const char *hostname;
+ const struct addrinfo *pai;
+ struct addrinfo sentinel, *cur;
+ struct res_target q, q2;
+
+ hostname = va_arg(ap, char *);
+ pai = va_arg(ap, const struct addrinfo *);
+
+ memset(&q, 0, sizeof(q2));
+ memset(&q2, 0, sizeof(q2));
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ buf = malloc(sizeof(*buf));
+ if (!buf) {
+ h_errno = NETDB_INTERNAL;
+ return NS_NOTFOUND;
+ }
+ buf2 = malloc(sizeof(*buf2));
+ if (!buf2) {
+ free(buf);
+ h_errno = NETDB_INTERNAL;
+ return NS_NOTFOUND;
+ }
+
+ switch (pai->ai_family) {
+ case AF_UNSPEC:
+ q.name = hostname;
+ q.qclass = C_IN;
+ q.qtype = T_A;
+ q.answer = buf->buf;
+ q.anslen = sizeof(buf->buf);
+ q.next = &q2;
+ q2.name = hostname;
+ q2.qclass = C_IN;
+ q2.qtype = T_AAAA;
+ q2.answer = buf2->buf;
+ q2.anslen = sizeof(buf2->buf);
+ break;
+ case AF_INET:
+ q.name = hostname;
+ q.qclass = C_IN;
+ q.qtype = T_A;
+ q.answer = buf->buf;
+ q.anslen = sizeof(buf->buf);
+ break;
+ case AF_INET6:
+ q.name = hostname;
+ q.qclass = C_IN;
+ q.qtype = T_AAAA;
+ q.answer = buf->buf;
+ q.anslen = sizeof(buf->buf);
+ break;
+ default:
+ free(buf);
+ free(buf2);
+ return NS_UNAVAIL;
+ }
+ if (res_searchN(hostname, &q) < 0) {
+ free(buf);
+ free(buf2);
+ return NS_NOTFOUND;
+ }
+ /* prefer IPv6 */
+ if (q.next) {
+ ai = getanswer(buf2, q2.n, q2.name, q2.qtype, pai);
+ if (ai) {
+ cur->ai_next = ai;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+ }
+ ai = getanswer(buf, q.n, q.name, q.qtype, pai);
+ if (ai)
+ cur->ai_next = ai;
+ free(buf);
+ free(buf2);
+ if (sentinel.ai_next == NULL)
+ switch (h_errno) {
+ case HOST_NOT_FOUND:
+ return NS_NOTFOUND;
+ case TRY_AGAIN:
+ return NS_TRYAGAIN;
+ default:
+ return NS_UNAVAIL;
+ }
+ *((struct addrinfo **)rv) = sentinel.ai_next;
+ return NS_SUCCESS;
+}
+
+#endif /* __SYMBIAN32__ */
+
+#ifndef __SYMBIAN32__
+static void
+_sethtent(FILE **hostf)
+{
+ if (!*hostf) { }
+
+#ifndef __SYMBIAN32__
+ *hostf = fopen(_PATH_HOSTS, "r");
+#endif
+ else
+ rewind(*hostf);
+}
+
+static void
+_endhtent(FILE **hostf)
+{
+ if (*hostf) {
+ (void) fclose(*hostf);
+ *hostf = NULL;
+ }
+}
+#endif /* __SYMBIAN32__ */
+
+#ifndef __SYMBIAN32__
+
+static struct addrinfo *
+_gethtent(FILE **hostf, const char *name, const struct addrinfo *pai)
+{
+ char *p;
+ char *cp, *tname, *cname;
+ struct addrinfo hints, *res0, *res;
+ int error;
+ const char *addr;
+ char hostbuf[8*1024];
+#ifndef __SYMBIAN32__
+ if (!*hostf && !(*hostf = fopen(_PATH_HOSTS, "r")))
+#endif//__SYMBIAN32__
+ return (NULL);
+again:
+ if (!(p = fgets(hostbuf, sizeof hostbuf, *hostf)))
+ return (NULL);
+ if (*p == '#')
+ goto again;
+ // to strip both carriage return and line feed character
+ cp = strpbrk(p, "#\r\n");
+
+ if (cp != NULL)
+ *cp = '\0';
+ if (!(cp = strpbrk(p, " \t")))
+ goto again;
+ *cp++ = '\0';
+ addr = p;
+ cname = NULL;
+ /* if this is not something we're looking for, skip it. */
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
+ }
+ tname = cp;
+ if (cname == NULL)
+ cname = cp;
+ if ((cp = strpbrk(cp, " \t")) != NULL)
+ *cp++ = '\0';
+ if (strcasecmp(name, tname) == 0)
+ goto found;
+ }
+ goto again;
+
+found:
+ /* we should not glob socktype/protocol here */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = pai->ai_family;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = 0;
+ hints.ai_flags = AI_NUMERICHOST;
+ error = getaddrinfo(addr, "0", &hints, &res0);
+ if (error)
+ goto again;
+#ifdef FILTER_V4MAPPED
+ /* XXX should check all items in the chain */
+ if (res0->ai_family == AF_INET6 &&
+ IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)res0->ai_addr)->sin6_addr)) {
+ freeaddrinfo(res0);
+ goto again;
+ }
+#endif
+ for (res = res0; res; res = res->ai_next) {
+ /* cover it up */
+ res->ai_flags = pai->ai_flags;
+ res->ai_socktype = pai->ai_socktype;
+ res->ai_protocol = pai->ai_protocol;
+
+ if (pai->ai_flags & AI_CANONNAME) {
+ if (get_canonname(pai, res, cname) != 0) {
+ freeaddrinfo(res0);
+ goto again;
+ }
+ }
+ }
+ return res0;
+}
+
+#endif //__SYMBIAN32__
+/*ARGSUSED*/
+#ifndef __SYMBIAN32__
+
+static int
+_files_getaddrinfo(rv, cb_data, ap)
+ void *rv;
+ void *cb_data;
+ va_list ap;
+{
+ const char *name;
+ const struct addrinfo *pai;
+ struct addrinfo sentinel, *cur;
+ struct addrinfo *p;
+ FILE *hostf = NULL;
+ name = va_arg(ap, char *);
+ pai = va_arg(ap, struct addrinfo *);
+
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ _sethtent(&hostf);
+ while ((p = _gethtent(&hostf, name, pai)) != NULL) {
+ cur->ai_next = p;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+ _endhtent(&hostf);
+
+ *((struct addrinfo **)rv) = sentinel.ai_next;
+ if (sentinel.ai_next == NULL)
+ return NS_NOTFOUND;
+ return NS_SUCCESS;
+}
+#endif // __SYMBIAN32__
+
+#ifdef YP
+/*ARGSUSED*/
+static struct addrinfo *
+_yphostent(line, pai)
+ char *line;
+ const struct addrinfo *pai;
+{
+ struct addrinfo sentinel, *cur;
+ struct addrinfo hints, *res, *res0;
+ int error;
+ char *p = line;
+ const char *addr, *canonname;
+ char *nextline;
+ char *cp;
+
+ addr = canonname = NULL;
+
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+nextline:
+ /* terminate line */
+ cp = strchr(p, '\n');
+ if (cp) {
+ *cp++ = '\0';
+ nextline = cp;
+ } else
+ nextline = NULL;
+
+ cp = strpbrk(p, " \t");
+ if (cp == NULL) {
+ if (canonname == NULL)
+ return (NULL);
+ else
+ goto done;
+ }
+ *cp++ = '\0';
+
+ addr = p;
+
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
+ }
+ if (!canonname)
+ canonname = cp;
+ if ((cp = strpbrk(cp, " \t")) != NULL)
+ *cp++ = '\0';
+ }
+
+ hints = *pai;
+ hints.ai_flags = AI_NUMERICHOST;
+ error = getaddrinfo(addr, NULL, &hints, &res0);
+ if (error == 0) {
+ for (res = res0; res; res = res->ai_next) {
+ /* cover it up */
+ res->ai_flags = pai->ai_flags;
+
+ if (pai->ai_flags & AI_CANONNAME)
+ (void)get_canonname(pai, res, canonname);
+ }
+ } else
+ res0 = NULL;
+ if (res0) {
+ cur->ai_next = res0;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+
+ if (nextline) {
+ p = nextline;
+ goto nextline;
+ }
+
+done:
+ return sentinel.ai_next;
+}
+
+/*ARGSUSED*/
+static int
+_yp_getaddrinfo(rv, cb_data, ap)
+ void *rv;
+ void *cb_data;
+ va_list ap;
+{
+ struct addrinfo sentinel, *cur;
+ struct addrinfo *ai = NULL;
+ char *ypbuf;
+ int ypbuflen, r;
+ const char *name;
+ const struct addrinfo *pai;
+ char *ypdomain;
+
+ if (_yp_check(&ypdomain) == 0)
+ return NS_UNAVAIL;
+
+ name = va_arg(ap, char *);
+ pai = va_arg(ap, const struct addrinfo *);
+
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ /* hosts.byname is only for IPv4 (Solaris8) */
+ if (pai->ai_family == PF_UNSPEC || pai->ai_family == PF_INET) {
+ r = yp_match(ypdomain, "hosts.byname", name,
+ (int)strlen(name), &ypbuf, &ypbuflen);
+ if (r == 0) {
+ struct addrinfo ai4;
+
+ ai4 = *pai;
+ ai4.ai_family = AF_INET;
+ ai = _yphostent(ypbuf, &ai4);
+ if (ai) {
+ cur->ai_next = ai;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+ free(ypbuf);
+ }
+ }
+
+ /* ipnodes.byname can hold both IPv4/v6 */
+ r = yp_match(ypdomain, "ipnodes.byname", name,
+ (int)strlen(name), &ypbuf, &ypbuflen);
+ if (r == 0) {
+ ai = _yphostent(ypbuf, pai);
+ if (ai)
+ cur->ai_next = ai;
+ free(ypbuf);
+ }
+
+ if (sentinel.ai_next == NULL) {
+ h_errno = HOST_NOT_FOUND;
+ return NS_NOTFOUND;
+ }
+ *((struct addrinfo **)rv) = sentinel.ai_next;
+ return NS_SUCCESS;
+}
+#endif
+
+/* resolver logic */
+
+extern const char *_res_hostalias(const char *, char *, size_t);
+
+/*
+ * Formulate a normal query, send, and await answer.
+ * Returned answer is placed in supplied buffer "answer".
+ * Perform preliminary check of answer, returning success only
+ * if no error is indicated and the answer count is nonzero.
+ * Return the size of the response on success, -1 on error.
+ * Error number is left in h_errno.
+ *
+ * Caller must parse answer and determine whether it answers the question.
+ */
+#ifndef __SYMBIAN32__
+static int
+res_queryN(name, target)
+ const char *name; /* domain name */
+ struct res_target *target;
+{
+ u_char *buf;
+ HEADER *hp;
+ int n;
+ struct res_target *t;
+ int rcode;
+ int ancount;
+
+ rcode = NOERROR;
+ ancount = 0;
+
+ buf = malloc(MAXPACKET);
+ if (!buf) {
+ h_errno = NETDB_INTERNAL;
+ return -1;
+ }
+
+ for (t = target; t; t = t->next) {
+ int class, type;
+ u_char *answer;
+ int anslen;
+
+ hp = (HEADER *)(void *)t->answer;
+ hp->rcode = NOERROR; /* default */
+
+ /* make it easier... */
+ class = t->qclass;
+ type = t->qtype;
+ answer = t->answer;
+ anslen = t->anslen;
+#ifdef DEBUG
+ if (_res.options & RES_DEBUG)
+ printf(";; res_query(%s, %d, %d)\n", name, class, type);
+#endif
+
+ n = res_mkquery(QUERY, name, class, type, NULL, 0, NULL,
+ buf, MAXPACKET);
+ if (n > 0 && (_res.options & RES_USE_EDNS0) != 0)
+ n = res_opt(n, buf, MAXPACKET, anslen);
+ if (n <= 0) {
+#ifdef DEBUG
+ if (_res.options & RES_DEBUG)
+ printf(";; res_query: mkquery failed\n");
+#endif
+ free(buf);
+ h_errno = NO_RECOVERY;
+ return (n);
+ }
+ n = res_send(buf, n, answer, anslen);
+#if 0
+ if (n < 0) {
+#ifdef DEBUG
+ if (_res.options & RES_DEBUG)
+ printf(";; res_query: send error\n");
+#endif
+ free(buf);
+ h_errno = TRY_AGAIN;
+ return (n);
+ }
+#endif
+
+ if (n < 0 || n > anslen)
+ hp->rcode = FORMERR; /* XXX not very informative */
+ if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) {
+ rcode = hp->rcode; /* record most recent error */
+#ifdef DEBUG
+ if (_res.options & RES_DEBUG)
+ printf(";; rcode = %u, ancount=%u\n", hp->rcode,
+ ntohs(hp->ancount));
+#endif
+ continue;
+ }
+
+ ancount += ntohs(hp->ancount);
+
+ t->n = n;
+ }
+
+ free(buf);
+
+ if (ancount == 0) {
+ switch (rcode) {
+ case NXDOMAIN:
+ h_errno = HOST_NOT_FOUND;
+ break;
+ case SERVFAIL:
+ h_errno = TRY_AGAIN;
+ break;
+ case NOERROR:
+ h_errno = NO_DATA;
+ break;
+ case FORMERR:
+ case NOTIMP:
+ case REFUSED:
+ default:
+ h_errno = NO_RECOVERY;
+ break;
+ }
+ return (-1);
+ }
+ return (ancount);
+}
+
+#endif
+
+/*
+ * Formulate a normal query, send, and retrieve answer in supplied buffer.
+ * Return the size of the response on success, -1 on error.
+ * If enabled, implement search rules until answer or unrecoverable failure
+ * is detected. Error code, if any, is left in h_errno.
+ */
+#ifndef __SYMBIAN32__
+static int
+res_searchN(name, target)
+ const char *name; /* domain name */
+ struct res_target *target;
+{
+ const char *cp, * const *domain;
+ HEADER *hp = (HEADER *)(void *)target->answer; /*XXX*/
+ u_int dots;
+ int trailing_dot, ret, saved_herrno;
+ int got_nodata = 0, got_servfail = 0, tried_as_is = 0;
+ char abuf[MAXDNAME];
+
+ if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
+ h_errno = NETDB_INTERNAL;
+ return (-1);
+ }
+
+ errno = 0;
+ h_errno = HOST_NOT_FOUND; /* default, if we never query */
+ dots = 0;
+ for (cp = name; *cp; cp++)
+ dots += (*cp == '.');
+ trailing_dot = 0;
+ if (cp > name && *--cp == '.')
+ trailing_dot++;
+
+ /*
+ * if there aren't any dots, it could be a user-level alias
+ */
+ if (!dots && (cp = _res_hostalias(name, abuf, sizeof(abuf))) != NULL)
+ return (res_queryN(cp, target));
+
+ /*
+ * If there are dots in the name already, let's just give it a try
+ * 'as is'. The threshold can be set with the "ndots" option.
+ */
+ saved_herrno = -1;
+ if (dots >= _res.ndots) {
+ ret = res_querydomainN(name, NULL, target);
+ if (ret > 0)
+ return (ret);
+ saved_herrno = h_errno;
+ tried_as_is++;
+ }
+
+ /*
+ * We do at least one level of search if
+ * - there is no dot and RES_DEFNAME is set, or
+ * - there is at least one dot, there is no trailing dot,
+ * and RES_DNSRCH is set.
+ */
+ if ((!dots && (_res.options & RES_DEFNAMES)) ||
+ (dots && !trailing_dot && (_res.options & RES_DNSRCH))) {
+ int done = 0;
+
+ for (domain = (const char * const *)_res.dnsrch;
+ *domain && !done;
+ domain++) {
+
+ ret = res_querydomainN(name, *domain, target);
+ if (ret > 0)
+ return (ret);
+
+ /*
+ * If no server present, give up.
+ * If name isn't found in this domain,
+ * keep trying higher domains in the search list
+ * (if that's enabled).
+ * On a NO_DATA error, keep trying, otherwise
+ * a wildcard entry of another type could keep us
+ * from finding this entry higher in the domain.
+ * If we get some other error (negative answer or
+ * server failure), then stop searching up,
+ * but try the input name below in case it's
+ * fully-qualified.
+ */
+ if (errno == ECONNREFUSED) {
+ h_errno = TRY_AGAIN;
+ return (-1);
+ }
+
+ switch (h_errno) {
+ case NO_DATA:
+ got_nodata++;
+ /* FALLTHROUGH */
+ case HOST_NOT_FOUND:
+ /* keep trying */
+ break;
+ case TRY_AGAIN:
+ if (hp->rcode == SERVFAIL) {
+ /* try next search element, if any */
+ got_servfail++;
+ break;
+ }
+ /* FALLTHROUGH */
+ default:
+ /* anything else implies that we're done */
+ done++;
+ }
+ /*
+ * if we got here for some reason other than DNSRCH,
+ * we only wanted one iteration of the loop, so stop.
+ */
+ if (!(_res.options & RES_DNSRCH))
+ done++;
+ }
+ }
+
+ /*
+ * if we have not already tried the name "as is", do that now.
+ * note that we do this regardless of how many dots were in the
+ * name or whether it ends with a dot.
+ */
+ if (!tried_as_is && (dots || !(_res.options & RES_NOTLDQUERY))) {
+ ret = res_querydomainN(name, NULL, target);
+ if (ret > 0)
+ return (ret);
+ }
+
+ /*
+ * if we got here, we didn't satisfy the search.
+ * if we did an initial full query, return that query's h_errno
+ * (note that we wouldn't be here if that query had succeeded).
+ * else if we ever got a nodata, send that back as the reason.
+ * else send back meaningless h_errno, that being the one from
+ * the last DNSRCH we did.
+ */
+ if (saved_herrno != -1)
+ h_errno = saved_herrno;
+ else if (got_nodata)
+ h_errno = NO_DATA;
+ else if (got_servfail)
+ h_errno = TRY_AGAIN;
+ return (-1);
+}
+#endif
+/*
+ * Perform a call on res_query on the concatenation of name and domain,
+ * removing a trailing dot from name if domain is NULL.
+ */
+
+#ifndef __SYMBIAN32__
+static int
+res_querydomainN(name, domain, target)
+ const char *name, *domain;
+ struct res_target *target;
+{
+ char nbuf[MAXDNAME];
+ const char *longname = nbuf;
+ size_t n, d;
+
+#ifdef DEBUG
+ if (_res.options & RES_DEBUG)
+ printf(";; res_querydomain(%s, %s)\n",
+ name, domain?domain:"<Nil>");
+#endif
+ if (domain == NULL) {
+ /*
+ * Check for trailing '.';
+ * copy without '.' if present.
+ */
+ n = strlen(name);
+ if (n >= MAXDNAME) {
+ h_errno = NO_RECOVERY;
+ return (-1);
+ }
+ if (n > 0 && name[--n] == '.') {
+ strncpy(nbuf, name, n);
+ nbuf[n] = '\0';
+ } else
+ longname = name;
+ } else {
+ n = strlen(name);
+ d = strlen(domain);
+ if (n + d + 1 >= MAXDNAME) {
+ h_errno = NO_RECOVERY;
+ return (-1);
+ }
+ snprintf(nbuf, sizeof(nbuf), "%s.%s", name, domain);
+ }
+ return (res_queryN(longname, target));
+}
+#endif /*__SYMBIAN32__*/
+
+#ifdef __SYMBIAN32__
+static long int
+explore_hostname(pai, hostname, servname, res, hints)
+ struct addrinfo *pai;
+ const char *hostname;
+ const char *servname;
+ struct addrinfo **res;
+ const struct addrinfo *hints;
+{
+ const struct afd *afd;
+ struct addrinfo *cur;
+ struct addrinfo sentinel;
+ int error;
+ int family_flag=0;
+ *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;
+ if (pai->ai_family == PF_UNSPEC) {
+#ifdef PF_INET6
+#ifdef __SYMBIAN32__
+// XXX: Fix this
+ pai->ai_family = PF_INET;
+#else
+ pai->ai_family = PF_INET6;
+#endif // __SYMBIAN32__
+#else
+ pai->ai_family = PF_INET;
+#endif
+ family_flag=1;
+ }
+
+ afd = find_afd(pai->ai_family);
+ if( afd==NULL && family_flag )
+ {
+ if(pai->ai_family==PF_INET6)
+ {
+ pai->ai_family=PF_INET;
+ }
+ else
+ {
+ pai->ai_family=PF_INET6;
+ }
+ afd=find_afd(pai->ai_family);
+ }
+
+ if (afd == NULL)
+ {
+ return 0;
+ }
+
+ if ( pai->ai_family == PF_UNSPEC ||pai->ai_family == afd->a_af)
+ {
+ struct addrinfo *resNative;
+ struct addrinfo *currNative;
+ int haveV4Mapped = 0;
+ /* Get the list of addresses using the native api */
+ int ret = getaddrinfo_private(hostname, pai, &resNative);
+ if(ret != 0)
+ ERR(ret);
+
+ /* copy the addresses to the local list */
+ currNative = resNative;
+ while(currNative)
+ {
+ if(currNative->ai_family == PF_INET && (hints->ai_family == PF_INET || hints->ai_family == PF_UNSPEC))
+ {
+ if(currNative->ai_flags & AI_V4MAPPED)
+ {
+ haveV4Mapped = 1;
+ }
+ else
+ {
+ struct sockaddr_in* sAddrTmp = (struct sockaddr_in*) (currNative->ai_addr);
+ GET_AI(cur->ai_next, afd, (char*)&(sAddrTmp->sin_addr));
+ cur->ai_next->ai_addr->sa_family = cur->ai_next->ai_family = PF_INET;
+ GET_PORT(cur->ai_next, servname);
+
+ if((pai->ai_flags & AI_CANONNAME))
+ GET_CANONNAME(cur->ai_next, currNative->ai_canonname);
+
+ cur = cur->ai_next;
+ }
+ }
+
+ if(currNative->ai_family == PF_INET6 && (hints->ai_family == PF_INET6 || hints->ai_family == PF_UNSPEC))
+ {
+ struct sockaddr_in6* sAddrTmp = (struct sockaddr_in6*) (currNative->ai_addr);
+ GET_AI(cur->ai_next, afd, (char*)&(sAddrTmp->sin6_addr));
+ cur->ai_next->ai_addr->sa_family = cur->ai_next->ai_family = PF_INET6;
+ GET_PORT(cur->ai_next, servname);
+
+ if((pai->ai_flags & AI_CANONNAME))
+ GET_CANONNAME(cur->ai_next, currNative->ai_canonname);
+
+ cur = cur->ai_next;
+ }
+
+ currNative = currNative->ai_next;
+ }
+
+ if(hints->ai_family == PF_INET && !sentinel.ai_next && haveV4Mapped)
+ {
+ currNative = resNative;
+ while(currNative)
+ {
+ //This is the set of Mapped Addresses.
+ if(currNative->ai_flags & AI_V4MAPPED)
+ {
+ struct sockaddr_in* sAddrTmp = (struct sockaddr_in*) (currNative->ai_addr);
+ currNative->ai_flags &= ~AI_V4MAPPED;
+ GET_AI(cur->ai_next, afd, (char*)&(sAddrTmp->sin_addr));
+ cur->ai_next->ai_addr->sa_family = cur->ai_next->ai_family = PF_INET;
+ GET_PORT(cur->ai_next, servname);
+
+ if((pai->ai_flags & AI_CANONNAME))
+ GET_CANONNAME(cur->ai_next, currNative->ai_canonname);
+ cur = cur->ai_next;
+ }
+
+ currNative = currNative->ai_next;
+ }
+ }
+ /* free the address list returned by native api */
+ freeaddrinfo_private(resNative);
+ }
+ else
+ ERR(EAI_FAMILY);
+
+ *res = sentinel.ai_next;
+ return 0;
+
+free:
+bad:
+ if (sentinel.ai_next)
+ freeaddrinfo(sentinel.ai_next);
+ return error;
+}
+
+#endif//__SYMBIAN32__