/* Host name resolution and matching.
- Copyright (C) 1996-2006 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation,
+ Inc.
This file is part of GNU Wget.
GNU Wget is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
GNU Wget is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with Wget; if not, write to the Free Software Foundation, Inc.,
-51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+along with Wget. If not, see <http://www.gnu.org/licenses/>.
-In addition, as a special exception, the Free Software Foundation
-gives permission to link the code of its release of Wget with the
-OpenSSL project's "OpenSSL" library (or with modified versions of it
-that use the same license as the "OpenSSL" library), and distribute
-the linked executables. You must obey the GNU General Public License
-in all respects for all of the code used other than "OpenSSL". If you
-modify this file, you may extend this exception to your version of the
-file, but you are not obligated to do so. If you do not wish to do
-so, delete this exception statement from your version. */
+Additional permission under GNU GPL version 3 section 7
-#include <config.h>
+If you modify this program, or any covered work, by linking or
+combining it with the OpenSSL project's OpenSSL library (or a
+modified version of that library), containing parts covered by the
+terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
+grants you additional permission to convey the resulting work.
+Corresponding Source for a non-source form of such a combination
+shall include the source code for the parts of OpenSSL used as well
+as that of the covered work. */
+
+#include "wget.h"
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#ifndef WINDOWS
+# include <sys/types.h>
# include <sys/socket.h>
# include <netinet/in.h>
# ifndef __BEOS__
# include <arpa/inet.h>
# endif
-# include <netdb.h>
+# ifdef __VMS
+# include "vms_ip.h"
+# else /* def __VMS */
+# include <netdb.h>
+# endif /* def __VMS [else] */
# define SET_H_ERRNO(err) ((void)(h_errno = (err)))
#else /* WINDOWS */
+# include <winsock2.h>
+# include <ws2tcpip.h>
# define SET_H_ERRNO(err) WSASetLastError (err)
#endif /* WINDOWS */
#include <errno.h>
-#include "wget.h"
#include "utils.h"
#include "host.h"
#include "url.h"
# define NO_ADDRESS NO_DATA
#endif
+#if !HAVE_DECL_H_ERRNO && !defined(WINDOWS)
+extern int h_errno;
+#endif
+
+
/* Lists of IP addresses that result from running DNS queries. See
lookup_host for details. */
struct address_list {
- int count; /* number of adrresses */
- ip_address *addresses; /* pointer to the string of addresses */
+ int count; /* number of adrresses */
+ ip_address *addresses; /* pointer to the string of addresses */
- int faulty; /* number of addresses known not to work. */
- bool connected; /* whether we were able to connect to
- one of the addresses in the list,
- at least once. */
+ int faulty; /* number of addresses known not to work. */
+ bool connected; /* whether we were able to connect to
+ one of the addresses in the list,
+ at least once. */
- int refcount; /* reference count; when it drops to
- 0, the entry is freed. */
+ int refcount; /* reference count; when it drops to
+ 0, the entry is freed. */
};
/* Get the bounds of the address list. */
{
case AF_INET:
for (i = 0; i < al->count; i++)
- {
- ip_address *cur = al->addresses + i;
- if (cur->family == AF_INET
- && (cur->data.d4.s_addr == ip->data.d4.s_addr))
- return true;
- }
+ {
+ ip_address *cur = al->addresses + i;
+ if (cur->family == AF_INET
+ && (cur->data.d4.s_addr == ip->data.d4.s_addr))
+ return true;
+ }
return false;
#ifdef ENABLE_IPV6
case AF_INET6:
for (i = 0; i < al->count; i++)
- {
- ip_address *cur = al->addresses + i;
- if (cur->family == AF_INET6
+ {
+ ip_address *cur = al->addresses + i;
+ if (cur->family == AF_INET6
#ifdef HAVE_SOCKADDR_IN6_SCOPE_ID
- && cur->ipv6_scope == ip->ipv6_scope
+ && cur->ipv6_scope == ip->ipv6_scope
#endif
- && IN6_ARE_ADDR_EQUAL (&cur->data.d6, &ip->data.d6))
- return true;
- }
+ && IN6_ARE_ADDR_EQUAL (&cur->data.d6, &ip->data.d6))
+ return true;
+ }
return false;
#endif /* ENABLE_IPV6 */
default:
ip = al->addresses;
for (ptr = ai; ptr != NULL; ptr = ptr->ai_next)
- if (ptr->ai_family == AF_INET6)
+ if (ptr->ai_family == AF_INET6)
{
- const struct sockaddr_in6 *sin6 =
- (const struct sockaddr_in6 *)ptr->ai_addr;
- ip->family = AF_INET6;
- ip->data.d6 = sin6->sin6_addr;
+ const struct sockaddr_in6 *sin6 =
+ (const struct sockaddr_in6 *)ptr->ai_addr;
+ ip->family = AF_INET6;
+ ip->data.d6 = sin6->sin6_addr;
#ifdef HAVE_SOCKADDR_IN6_SCOPE_ID
- ip->ipv6_scope = sin6->sin6_scope_id;
+ ip->ipv6_scope = sin6->sin6_scope_id;
#endif
- ++ip;
- }
+ ++ip;
+ }
else if (ptr->ai_family == AF_INET)
{
- const struct sockaddr_in *sin =
- (const struct sockaddr_in *)ptr->ai_addr;
- ip->family = AF_INET;
- ip->data.d4 = sin->sin_addr;
- ++ip;
+ const struct sockaddr_in *sin =
+ (const struct sockaddr_in *)ptr->ai_addr;
+ ip->family = AF_INET;
+ ip->data.d4 = sin->sin_addr;
+ ++ip;
}
assert (ip - al->addresses == cnt);
return al;
{
--al->refcount;
DEBUGP (("Releasing 0x%0*lx (new refcount %d).\n", PTR_FORMAT (al),
- al->refcount));
+ al->refcount));
if (al->refcount <= 0)
{
DEBUGP (("Deleting unused 0x%0*lx.\n", PTR_FORMAT (al)));
}
/* Print error messages for host errors. */
-static char *
+static const char *
host_errstr (int error)
{
/* Can't use switch since some of these constants can be equal,
static int
getaddrinfo_with_timeout (const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res,
- double timeout)
+ const struct addrinfo *hints, struct addrinfo **res,
+ double timeout)
{
struct gaiwt_context ctx;
ctx.node = node;
int ch = *str++;
if (ch >= '0' && ch <= '9')
- {
- val = val * 10 + (ch - '0');
-
- if (val > 255)
- return false;
- if (!saw_digit)
- {
- if (++octets > 4)
- return false;
- saw_digit = true;
- }
- }
+ {
+ val = val * 10 + (ch - '0');
+
+ if (val > 255)
+ return false;
+ if (!saw_digit)
+ {
+ if (++octets > 4)
+ return false;
+ saw_digit = true;
+ }
+ }
else if (ch == '.' && saw_digit)
- {
- if (octets == 4)
- return false;
- val = 0;
- saw_digit = false;
- }
+ {
+ if (octets == 4)
+ return false;
+ val = 0;
+ saw_digit = false;
+ }
else
- return false;
+ return false;
}
if (octets < 4)
return false;
-
+
return true;
}
if (str == end)
return false;
-
+
/* Leading :: requires some special handling. */
if (*str == ':')
{
++str;
if (str == end || *str != ':')
- return false;
+ return false;
}
curtok = str;
int ch = *str++;
/* if ch is a number, add it to val. */
- if (ISXDIGIT (ch))
- {
- val <<= 4;
- val |= XDIGIT_TO_NUM (ch);
- if (val > 0xffff)
- return false;
- saw_xdigit = true;
- continue;
- }
+ if (c_isxdigit (ch))
+ {
+ val <<= 4;
+ val |= XDIGIT_TO_NUM (ch);
+ if (val > 0xffff)
+ return false;
+ saw_xdigit = true;
+ continue;
+ }
/* if ch is a colon ... */
if (ch == ':')
- {
- curtok = str;
- if (!saw_xdigit)
- {
- if (colonp != NULL)
- return false;
- colonp = str + tp;
- continue;
- }
- else if (str == end)
- return false;
- if (tp > ns_in6addrsz - ns_int16sz)
- return false;
- tp += ns_int16sz;
- saw_xdigit = false;
- val = 0;
- continue;
- }
+ {
+ curtok = str;
+ if (!saw_xdigit)
+ {
+ if (colonp != NULL)
+ return false;
+ colonp = str + tp;
+ continue;
+ }
+ else if (str == end)
+ return false;
+ if (tp > ns_in6addrsz - ns_int16sz)
+ return false;
+ tp += ns_int16sz;
+ saw_xdigit = false;
+ val = 0;
+ continue;
+ }
/* if ch is a dot ... */
if (ch == '.' && (tp <= ns_in6addrsz - ns_inaddrsz)
- && is_valid_ipv4_address (curtok, end) == 1)
- {
- tp += ns_inaddrsz;
- saw_xdigit = false;
- break;
- }
-
+ && is_valid_ipv4_address (curtok, end) == 1)
+ {
+ tp += ns_inaddrsz;
+ saw_xdigit = false;
+ break;
+ }
+
return false;
}
if (saw_xdigit)
{
- if (tp > ns_in6addrsz - ns_int16sz)
- return false;
+ if (tp > ns_in6addrsz - ns_int16sz)
+ return false;
tp += ns_int16sz;
}
if (colonp != NULL)
{
- if (tp == ns_in6addrsz)
- return false;
+ if (tp == ns_in6addrsz)
+ return false;
tp = ns_in6addrsz;
}
int i;
debug_logprintf ("Caching %s =>", host);
for (i = 0; i < al->count; i++)
- debug_logprintf (" %s", print_address (al->addresses + i));
+ debug_logprintf (" %s", print_address (al->addresses + i));
debug_logprintf ("\n");
}
}
LH_SILENT - don't print the "resolving ... done" messages.
LH_BIND - resolve addresses for use with bind, which under
IPv6 means to use AI_PASSIVE flag to getaddrinfo.
- Passive lookups are not cached under IPv6.
+ Passive lookups are not cached under IPv6.
LH_REFRESH - if HOST is cached, remove the entry from the cache
and resolve it anew. */
uint32_t addr_ipv4 = (uint32_t)inet_addr (host);
if (addr_ipv4 != (uint32_t) -1)
{
- /* No need to cache host->addr relation, just return the
- address. */
- char *vec[2];
- vec[0] = (char *)&addr_ipv4;
- vec[1] = NULL;
- return address_list_from_ipv4_addresses (vec);
+ /* No need to cache host->addr relation, just return the
+ address. */
+ char *vec[2];
+ vec[0] = (char *)&addr_ipv4;
+ vec[1] = NULL;
+ return address_list_from_ipv4_addresses (vec);
}
}
#else /* ENABLE_IPV6 */
if (use_cache)
{
if (!(flags & LH_REFRESH))
- {
- al = cache_query (host);
- if (al)
- return al;
- }
+ {
+ al = cache_query (host);
+ if (al)
+ return al;
+ }
else
- cache_remove (host);
+ cache_remove (host);
}
/* No luck with the cache; resolve HOST. */
if (!silent && !numeric_address)
- logprintf (LOG_VERBOSE, _("Resolving %s... "), escnonprint (host));
+ {
+ char *str = NULL, *name;
+
+ if (opt.enable_iri && (name = idn_decode ((char *) host)) != NULL)
+ {
+ int len = strlen (host) + strlen (name) + 4;
+ str = xmalloc (len);
+ snprintf (str, len, "%s (%s)", name, host);
+ str[len-1] = '\0';
+ xfree (name);
+ }
+
+ logprintf (LOG_VERBOSE, _("Resolving %s... "),
+ quotearg_style (escape_quoting_style, str ? str : host));
+
+ if (str)
+ xfree (str);
+ }
#ifdef ENABLE_IPV6
{
hints.ai_family = AF_INET6;
else
/* We tried using AI_ADDRCONFIG, but removed it because: it
- misinterprets IPv6 loopbacks, it is broken on AIX 5.1, and
- it's unneeded since we sort the addresses anyway. */
- hints.ai_family = AF_UNSPEC;
+ misinterprets IPv6 loopbacks, it is broken on AIX 5.1, and
+ it's unneeded since we sort the addresses anyway. */
+ hints.ai_family = AF_UNSPEC;
if (flags & LH_BIND)
hints.ai_flags |= AI_PASSIVE;
#ifdef AI_NUMERICHOST
if (numeric_address)
{
- /* Where available, the AI_NUMERICHOST hint can prevent costly
- access to DNS servers. */
- hints.ai_flags |= AI_NUMERICHOST;
- timeout = 0; /* no timeout needed when "resolving"
- numeric hosts -- avoid setting up
- signal handlers and such. */
+ /* Where available, the AI_NUMERICHOST hint can prevent costly
+ access to DNS servers. */
+ hints.ai_flags |= AI_NUMERICHOST;
+ timeout = 0; /* no timeout needed when "resolving"
+ numeric hosts -- avoid setting up
+ signal handlers and such. */
}
#endif
err = getaddrinfo_with_timeout (host, NULL, &hints, &res, timeout);
if (err != 0 || res == NULL)
{
- if (!silent)
- logprintf (LOG_VERBOSE, _("failed: %s.\n"),
- err != EAI_SYSTEM ? gai_strerror (err) : strerror (errno));
- return NULL;
+ if (!silent)
+ logprintf (LOG_VERBOSE, _("failed: %s.\n"),
+ err != EAI_SYSTEM ? gai_strerror (err) : strerror (errno));
+ return NULL;
}
al = address_list_from_addrinfo (res);
freeaddrinfo (res);
if (!al)
{
- logprintf (LOG_VERBOSE,
- _("failed: No IPv4/IPv6 addresses for host.\n"));
- return NULL;
+ logprintf (LOG_VERBOSE,
+ _("failed: No IPv4/IPv6 addresses for host.\n"));
+ return NULL;
}
/* Reorder addresses so that IPv4 ones (or IPv6 ones, as per
the addresses with the same family is undisturbed. */
if (al->count > 1 && opt.prefer_family != prefer_none)
stable_sort (al->addresses, al->count, sizeof (ip_address),
- opt.prefer_family == prefer_ipv4
- ? cmp_prefer_ipv4 : cmp_prefer_ipv6);
+ opt.prefer_family == prefer_ipv4
+ ? cmp_prefer_ipv4 : cmp_prefer_ipv6);
}
#else /* not ENABLE_IPV6 */
{
struct hostent *hptr = gethostbyname_with_timeout (host, timeout);
if (!hptr)
{
- if (!silent)
- {
- if (errno != ETIMEDOUT)
- logprintf (LOG_VERBOSE, _("failed: %s.\n"),
- host_errstr (h_errno));
- else
- logputs (LOG_VERBOSE, _("failed: timed out.\n"));
- }
- return NULL;
+ if (!silent)
+ {
+ if (errno != ETIMEDOUT)
+ logprintf (LOG_VERBOSE, _("failed: %s.\n"),
+ host_errstr (h_errno));
+ else
+ logputs (LOG_VERBOSE, _("failed: timed out.\n"));
+ }
+ return NULL;
}
/* Do older systems have h_addr_list? */
al = address_list_from_ipv4_addresses (hptr->h_addr_list);
#endif /* not ENABLE_IPV6 */
/* Print the addresses determined by DNS lookup, but no more than
- three. */
+ three if show_all_dns_entries is not specified. */
if (!silent && !numeric_address)
{
int i;
- int printmax = al->count <= 3 ? al->count : 3;
+ int printmax = al->count;
+
+ if (!opt.show_all_dns_entries && printmax > 3)
+ printmax = 3;
+
for (i = 0; i < printmax; i++)
- {
- logputs (LOG_VERBOSE, print_address (al->addresses + i));
- if (i < printmax - 1)
- logputs (LOG_VERBOSE, ", ");
- }
+ {
+ logputs (LOG_VERBOSE, print_address (al->addresses + i));
+ if (i < printmax - 1)
+ logputs (LOG_VERBOSE, ", ");
+ }
if (printmax != al->count)
- logputs (LOG_VERBOSE, ", ...");
+ logputs (LOG_VERBOSE, ", ...");
logputs (LOG_VERBOSE, "\n");
}
if (opt.domains)
{
if (!sufmatch ((const char **)opt.domains, u->host))
- return false;
+ return false;
}
if (opt.exclude_domains)
{
if (sufmatch ((const char **)opt.exclude_domains, u->host))
- return false;
+ return false;
}
return true;
}
lw = strlen (what);
for (i = 0; list[i]; i++)
{
+ if (list[i][0] == '\0')
+ continue;
+
for (j = strlen (list[i]), k = lw; j >= 0 && k >= 0; j--, k--)
- if (TOLOWER (list[i][j]) != TOLOWER (what[k]))
- break;
+ if (c_tolower (list[i][j]) != c_tolower (what[k]))
+ break;
/* The domain must be first to reach to beginning. */
if (j == -1)
- return true;
+ return true;
}
return false;
}
{
hash_table_iterator iter;
for (hash_table_iterate (host_name_addresses_map, &iter);
- hash_table_iter_next (&iter);
- )
- {
- char *host = iter.key;
- struct address_list *al = iter.value;
- xfree (host);
- assert (al->refcount == 1);
- address_list_delete (al);
- }
+ hash_table_iter_next (&iter);
+ )
+ {
+ char *host = iter.key;
+ struct address_list *al = iter.value;
+ xfree (host);
+ assert (al->refcount == 1);
+ address_list_delete (al);
+ }
hash_table_destroy (host_name_addresses_map);
host_name_addresses_map = NULL;
}
}
+
+bool
+is_valid_ip_address (const char *name)
+{
+ const char *endp;
+
+ endp = name + strlen(name);
+ if (is_valid_ipv4_address (name, endp))
+ return true;
+#ifdef ENABLE_IPV6
+ if (is_valid_ipv6_address (name, endp))
+ return true;
+#endif
+ return false;
+}
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