1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2
3 /* GIO - GLib Input, Output and Streaming Library
4 *
5 * Copyright (C) 2008 Red Hat, Inc.
6 * Copyright (C) 2018 Igalia S.L.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General
19 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "config.h"
23 #include <glib.h>
24 #include "glibintl.h"
25
26 #include <stdlib.h>
27 #include "gnetworkaddress.h"
28 #include "gasyncresult.h"
29 #include "ginetaddress.h"
30 #include "ginetsocketaddress.h"
31 #include "gnetworkingprivate.h"
32 #include "gproxyaddressenumerator.h"
33 #include "gresolver.h"
34 #include "gtask.h"
35 #include "gsocketaddressenumerator.h"
36 #include "gioerror.h"
37 #include "gsocketconnectable.h"
38
39 #include <string.h>
40
41 /* As recommended by RFC 8305 this is the time it waits for a following
42 DNS response to come in (ipv4 waiting on ipv6 generally)
43 */
44 #define HAPPY_EYEBALLS_RESOLUTION_DELAY_MS 50
45
46 /**
47 * SECTION:gnetworkaddress
48 * @short_description: A GSocketConnectable for resolving hostnames
49 * @include: gio/gio.h
50 *
51 * #GNetworkAddress provides an easy way to resolve a hostname and
52 * then attempt to connect to that host, handling the possibility of
53 * multiple IP addresses and multiple address families.
54 *
55 * The enumeration results of resolved addresses *may* be cached as long
56 * as this object is kept alive which may have unexpected results if
57 * alive for too long.
58 *
59 * See #GSocketConnectable for an example of using the connectable
60 * interface.
61 */
62
63 /**
64 * GNetworkAddress:
65 *
66 * A #GSocketConnectable for resolving a hostname and connecting to
67 * that host.
68 */
69
70 struct _GNetworkAddressPrivate {
71 gchar *hostname;
72 guint16 port;
73 GList *cached_sockaddrs;
74 gchar *scheme;
75
76 gint64 resolver_serial;
77 };
78
79 enum {
80 PROP_0,
81 PROP_HOSTNAME,
82 PROP_PORT,
83 PROP_SCHEME,
84 };
85
86 static void g_network_address_set_property (GObject *object,
87 guint prop_id,
88 const GValue *value,
89 GParamSpec *pspec);
90 static void g_network_address_get_property (GObject *object,
91 guint prop_id,
92 GValue *value,
93 GParamSpec *pspec);
94
95 static void g_network_address_connectable_iface_init (GSocketConnectableIface *iface);
96 static GSocketAddressEnumerator *g_network_address_connectable_enumerate (GSocketConnectable *connectable);
97 static GSocketAddressEnumerator *g_network_address_connectable_proxy_enumerate (GSocketConnectable *connectable);
98 static gchar *g_network_address_connectable_to_string (GSocketConnectable *connectable);
99
G_DEFINE_TYPE_WITH_CODE(GNetworkAddress,g_network_address,G_TYPE_OBJECT,G_ADD_PRIVATE (GNetworkAddress)G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,g_network_address_connectable_iface_init))100 G_DEFINE_TYPE_WITH_CODE (GNetworkAddress, g_network_address, G_TYPE_OBJECT,
101 G_ADD_PRIVATE (GNetworkAddress)
102 G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,
103 g_network_address_connectable_iface_init))
104
105 static void
106 g_network_address_finalize (GObject *object)
107 {
108 GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
109
110 g_free (addr->priv->hostname);
111 g_free (addr->priv->scheme);
112 g_list_free_full (addr->priv->cached_sockaddrs, g_object_unref);
113
114 G_OBJECT_CLASS (g_network_address_parent_class)->finalize (object);
115 }
116
117 static void
g_network_address_class_init(GNetworkAddressClass * klass)118 g_network_address_class_init (GNetworkAddressClass *klass)
119 {
120 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
121
122 gobject_class->set_property = g_network_address_set_property;
123 gobject_class->get_property = g_network_address_get_property;
124 gobject_class->finalize = g_network_address_finalize;
125
126 g_object_class_install_property (gobject_class, PROP_HOSTNAME,
127 g_param_spec_string ("hostname",
128 P_("Hostname"),
129 P_("Hostname to resolve"),
130 NULL,
131 G_PARAM_READWRITE |
132 G_PARAM_CONSTRUCT_ONLY |
133 G_PARAM_STATIC_STRINGS));
134 g_object_class_install_property (gobject_class, PROP_PORT,
135 g_param_spec_uint ("port",
136 P_("Port"),
137 P_("Network port"),
138 0, 65535, 0,
139 G_PARAM_READWRITE |
140 G_PARAM_CONSTRUCT_ONLY |
141 G_PARAM_STATIC_STRINGS));
142
143 g_object_class_install_property (gobject_class, PROP_SCHEME,
144 g_param_spec_string ("scheme",
145 P_("Scheme"),
146 P_("URI Scheme"),
147 NULL,
148 G_PARAM_READWRITE |
149 G_PARAM_CONSTRUCT_ONLY |
150 G_PARAM_STATIC_STRINGS));
151 }
152
153 static void
g_network_address_connectable_iface_init(GSocketConnectableIface * connectable_iface)154 g_network_address_connectable_iface_init (GSocketConnectableIface *connectable_iface)
155 {
156 connectable_iface->enumerate = g_network_address_connectable_enumerate;
157 connectable_iface->proxy_enumerate = g_network_address_connectable_proxy_enumerate;
158 connectable_iface->to_string = g_network_address_connectable_to_string;
159 }
160
161 static void
g_network_address_init(GNetworkAddress * addr)162 g_network_address_init (GNetworkAddress *addr)
163 {
164 addr->priv = g_network_address_get_instance_private (addr);
165 }
166
167 static void
g_network_address_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)168 g_network_address_set_property (GObject *object,
169 guint prop_id,
170 const GValue *value,
171 GParamSpec *pspec)
172 {
173 GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
174
175 switch (prop_id)
176 {
177 case PROP_HOSTNAME:
178 g_free (addr->priv->hostname);
179 addr->priv->hostname = g_value_dup_string (value);
180 break;
181
182 case PROP_PORT:
183 addr->priv->port = g_value_get_uint (value);
184 break;
185
186 case PROP_SCHEME:
187 g_free (addr->priv->scheme);
188 addr->priv->scheme = g_value_dup_string (value);
189 break;
190
191 default:
192 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
193 break;
194 }
195
196 }
197
198 static void
g_network_address_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)199 g_network_address_get_property (GObject *object,
200 guint prop_id,
201 GValue *value,
202 GParamSpec *pspec)
203 {
204 GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
205
206 switch (prop_id)
207 {
208 case PROP_HOSTNAME:
209 g_value_set_string (value, addr->priv->hostname);
210 break;
211
212 case PROP_PORT:
213 g_value_set_uint (value, addr->priv->port);
214 break;
215
216 case PROP_SCHEME:
217 g_value_set_string (value, addr->priv->scheme);
218 break;
219
220 default:
221 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
222 break;
223 }
224
225 }
226
227 /*
228 * inet_addresses_to_inet_socket_addresses:
229 * @addresses: (transfer full): #GList of #GInetAddress
230 *
231 * Returns: (transfer full): #GList of #GInetSocketAddress
232 */
233 static GList *
inet_addresses_to_inet_socket_addresses(GNetworkAddress * addr,GList * addresses)234 inet_addresses_to_inet_socket_addresses (GNetworkAddress *addr,
235 GList *addresses)
236 {
237 GList *a, *socket_addresses = NULL;
238
239 for (a = addresses; a; a = a->next)
240 {
241 GSocketAddress *sockaddr = g_inet_socket_address_new (a->data, addr->priv->port);
242 socket_addresses = g_list_append (socket_addresses, g_steal_pointer (&sockaddr));
243 g_object_unref (a->data);
244 }
245
246 g_list_free (addresses);
247 return socket_addresses;
248 }
249
250 /*
251 * g_network_address_set_cached_addresses:
252 * @addr: A #GNetworkAddress
253 * @addresses: (transfer full): List of #GInetAddress or #GInetSocketAddress
254 * @resolver_serial: Serial of #GResolver used
255 *
256 * Consumes @addresses and uses them to replace the current internal list.
257 */
258 static void
g_network_address_set_cached_addresses(GNetworkAddress * addr,GList * addresses,guint64 resolver_serial)259 g_network_address_set_cached_addresses (GNetworkAddress *addr,
260 GList *addresses,
261 guint64 resolver_serial)
262 {
263 g_assert (addresses != NULL);
264
265 if (addr->priv->cached_sockaddrs)
266 g_list_free_full (addr->priv->cached_sockaddrs, g_object_unref);
267
268 if (G_IS_INET_SOCKET_ADDRESS (addresses->data))
269 addr->priv->cached_sockaddrs = g_steal_pointer (&addresses);
270 else
271 addr->priv->cached_sockaddrs = inet_addresses_to_inet_socket_addresses (addr, g_steal_pointer (&addresses));
272 addr->priv->resolver_serial = resolver_serial;
273 }
274
275 static gboolean
g_network_address_parse_sockaddr(GNetworkAddress * addr)276 g_network_address_parse_sockaddr (GNetworkAddress *addr)
277 {
278 GSocketAddress *sockaddr;
279
280 g_assert (addr->priv->cached_sockaddrs == NULL);
281
282 sockaddr = g_inet_socket_address_new_from_string (addr->priv->hostname,
283 addr->priv->port);
284 if (sockaddr)
285 {
286 addr->priv->cached_sockaddrs = g_list_append (addr->priv->cached_sockaddrs, sockaddr);
287 return TRUE;
288 }
289 else
290 return FALSE;
291 }
292
293 /**
294 * g_network_address_new:
295 * @hostname: the hostname
296 * @port: the port
297 *
298 * Creates a new #GSocketConnectable for connecting to the given
299 * @hostname and @port.
300 *
301 * Note that depending on the configuration of the machine, a
302 * @hostname of `localhost` may refer to the IPv4 loopback address
303 * only, or to both IPv4 and IPv6; use
304 * g_network_address_new_loopback() to create a #GNetworkAddress that
305 * is guaranteed to resolve to both addresses.
306 *
307 * Returns: (transfer full) (type GNetworkAddress): the new #GNetworkAddress
308 *
309 * Since: 2.22
310 */
311 GSocketConnectable *
g_network_address_new(const gchar * hostname,guint16 port)312 g_network_address_new (const gchar *hostname,
313 guint16 port)
314 {
315 return g_object_new (G_TYPE_NETWORK_ADDRESS,
316 "hostname", hostname,
317 "port", port,
318 NULL);
319 }
320
321 /**
322 * g_network_address_new_loopback:
323 * @port: the port
324 *
325 * Creates a new #GSocketConnectable for connecting to the local host
326 * over a loopback connection to the given @port. This is intended for
327 * use in connecting to local services which may be running on IPv4 or
328 * IPv6.
329 *
330 * The connectable will return IPv4 and IPv6 loopback addresses,
331 * regardless of how the host resolves `localhost`. By contrast,
332 * g_network_address_new() will often only return an IPv4 address when
333 * resolving `localhost`, and an IPv6 address for `localhost6`.
334 *
335 * g_network_address_get_hostname() will always return `localhost` for
336 * a #GNetworkAddress created with this constructor.
337 *
338 * Returns: (transfer full) (type GNetworkAddress): the new #GNetworkAddress
339 *
340 * Since: 2.44
341 */
342 GSocketConnectable *
g_network_address_new_loopback(guint16 port)343 g_network_address_new_loopback (guint16 port)
344 {
345 GNetworkAddress *addr;
346 GList *addrs = NULL;
347
348 addr = g_object_new (G_TYPE_NETWORK_ADDRESS,
349 "hostname", "localhost",
350 "port", port,
351 NULL);
352
353 addrs = g_list_append (addrs, g_inet_address_new_loopback (AF_INET6));
354 addrs = g_list_append (addrs, g_inet_address_new_loopback (AF_INET));
355 g_network_address_set_cached_addresses (addr, g_steal_pointer (&addrs), 0);
356
357 return G_SOCKET_CONNECTABLE (addr);
358 }
359
360 /**
361 * g_network_address_parse:
362 * @host_and_port: the hostname and optionally a port
363 * @default_port: the default port if not in @host_and_port
364 * @error: a pointer to a #GError, or %NULL
365 *
366 * Creates a new #GSocketConnectable for connecting to the given
367 * @hostname and @port. May fail and return %NULL in case
368 * parsing @host_and_port fails.
369 *
370 * @host_and_port may be in any of a number of recognised formats; an IPv6
371 * address, an IPv4 address, or a domain name (in which case a DNS
372 * lookup is performed). Quoting with [] is supported for all address
373 * types. A port override may be specified in the usual way with a
374 * colon.
375 *
376 * If no port is specified in @host_and_port then @default_port will be
377 * used as the port number to connect to.
378 *
379 * In general, @host_and_port is expected to be provided by the user
380 * (allowing them to give the hostname, and a port override if necessary)
381 * and @default_port is expected to be provided by the application.
382 *
383 * (The port component of @host_and_port can also be specified as a
384 * service name rather than as a numeric port, but this functionality
385 * is deprecated, because it depends on the contents of /etc/services,
386 * which is generally quite sparse on platforms other than Linux.)
387 *
388 * Returns: (transfer full) (type GNetworkAddress): the new
389 * #GNetworkAddress, or %NULL on error
390 *
391 * Since: 2.22
392 */
393 GSocketConnectable *
g_network_address_parse(const gchar * host_and_port,guint16 default_port,GError ** error)394 g_network_address_parse (const gchar *host_and_port,
395 guint16 default_port,
396 GError **error)
397 {
398 GSocketConnectable *connectable;
399 const gchar *port;
400 guint16 portnum;
401 gchar *name;
402
403 g_return_val_if_fail (host_and_port != NULL, NULL);
404
405 port = NULL;
406 if (host_and_port[0] == '[')
407 /* escaped host part (to allow, eg. "[2001:db8::1]:888") */
408 {
409 const gchar *end;
410
411 end = strchr (host_and_port, ']');
412 if (end == NULL)
413 {
414 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
415 _("Hostname “%s” contains “[” but not “]”"), host_and_port);
416 return NULL;
417 }
418
419 if (end[1] == '\0')
420 port = NULL;
421 else if (end[1] == ':')
422 port = &end[2];
423 else
424 {
425 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
426 "The ']' character (in hostname '%s') must come at the"
427 " end or be immediately followed by ':' and a port",
428 host_and_port);
429 return NULL;
430 }
431
432 name = g_strndup (host_and_port + 1, end - host_and_port - 1);
433 }
434
435 else if ((port = strchr (host_and_port, ':')))
436 /* string has a ':' in it */
437 {
438 /* skip ':' */
439 port++;
440
441 if (strchr (port, ':'))
442 /* more than one ':' in string */
443 {
444 /* this is actually an unescaped IPv6 address */
445 name = g_strdup (host_and_port);
446 port = NULL;
447 }
448 else
449 name = g_strndup (host_and_port, port - host_and_port - 1);
450 }
451
452 else
453 /* plain hostname, no port */
454 name = g_strdup (host_and_port);
455
456 if (port != NULL)
457 {
458 if (port[0] == '\0')
459 {
460 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
461 "If a ':' character is given, it must be followed by a "
462 "port (in hostname '%s').", host_and_port);
463 g_free (name);
464 return NULL;
465 }
466
467 else if ('0' <= port[0] && port[0] <= '9')
468 {
469 char *end;
470 long value;
471
472 value = strtol (port, &end, 10);
473 if (*end != '\0' || value < 0 || value > G_MAXUINT16)
474 {
475 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
476 "Invalid numeric port '%s' specified in hostname '%s'",
477 port, host_and_port);
478 g_free (name);
479 return NULL;
480 }
481
482 portnum = value;
483 }
484
485 else
486 {
487 struct servent *entry;
488
489 entry = getservbyname (port, "tcp");
490 if (entry == NULL)
491 {
492 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
493 "Unknown service '%s' specified in hostname '%s'",
494 port, host_and_port);
495 #ifdef HAVE_ENDSERVENT
496 endservent ();
497 #endif
498 g_free (name);
499 return NULL;
500 }
501
502 portnum = g_ntohs (entry->s_port);
503
504 #ifdef HAVE_ENDSERVENT
505 endservent ();
506 #endif
507 }
508 }
509 else
510 {
511 /* No port in host_and_port */
512 portnum = default_port;
513 }
514
515 connectable = g_network_address_new (name, portnum);
516 g_free (name);
517
518 return connectable;
519 }
520
521 /* Allowed characters outside alphanumeric for unreserved. */
522 #define G_URI_OTHER_UNRESERVED "-._~"
523
524 /* This or something equivalent will eventually go into glib/guri.h */
525 gboolean
_g_uri_parse_authority(const char * uri,char ** host,guint16 * port,char ** userinfo,GError ** error)526 _g_uri_parse_authority (const char *uri,
527 char **host,
528 guint16 *port,
529 char **userinfo,
530 GError **error)
531 {
532 char *ascii_uri, *tmp_str;
533 const char *start, *p, *at, *delim;
534 char c;
535
536 g_return_val_if_fail (uri != NULL, FALSE);
537
538 if (host)
539 *host = NULL;
540
541 if (port)
542 *port = 0;
543
544 if (userinfo)
545 *userinfo = NULL;
546
547 /* Catch broken URIs early by trying to convert to ASCII. */
548 ascii_uri = g_hostname_to_ascii (uri);
549 if (!ascii_uri)
550 goto error;
551
552 /* From RFC 3986 Decodes:
553 * URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
554 * hier-part = "//" authority path-abempty
555 * path-abempty = *( "/" segment )
556 * authority = [ userinfo "@" ] host [ ":" port ]
557 */
558
559 /* Check we have a valid scheme */
560 tmp_str = g_uri_parse_scheme (ascii_uri);
561
562 if (tmp_str == NULL)
563 goto error;
564
565 g_free (tmp_str);
566
567 /* Decode hier-part:
568 * hier-part = "//" authority path-abempty
569 */
570 p = ascii_uri;
571 start = strstr (p, "//");
572
573 if (start == NULL)
574 goto error;
575
576 start += 2;
577
578 /* check if the @ sign is part of the authority before attempting to
579 * decode the userinfo */
580 delim = strpbrk (start, "/?#[]");
581 at = strchr (start, '@');
582 if (at && delim && at > delim)
583 at = NULL;
584
585 if (at != NULL)
586 {
587 /* Decode userinfo:
588 * userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
589 * unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
590 * pct-encoded = "%" HEXDIG HEXDIG
591 */
592 p = start;
593 while (1)
594 {
595 c = *p++;
596
597 if (c == '@')
598 break;
599
600 /* pct-encoded */
601 if (c == '%')
602 {
603 if (!(g_ascii_isxdigit (p[0]) ||
604 g_ascii_isxdigit (p[1])))
605 goto error;
606
607 p++;
608
609 continue;
610 }
611
612 /* unreserved / sub-delims / : */
613 if (!(g_ascii_isalnum (c) ||
614 strchr (G_URI_OTHER_UNRESERVED, c) ||
615 strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c) ||
616 c == ':'))
617 goto error;
618 }
619
620 if (userinfo)
621 *userinfo = g_strndup (start, p - start - 1);
622
623 start = p;
624 }
625 else
626 {
627 p = start;
628 }
629
630
631 /* decode host:
632 * host = IP-literal / IPv4address / reg-name
633 * reg-name = *( unreserved / pct-encoded / sub-delims )
634 */
635
636 /* If IPv6 or IPvFuture */
637 if (*p == '[')
638 {
639 gboolean has_scope_id = FALSE, has_bad_scope_id = FALSE;
640
641 start++;
642 p++;
643 while (1)
644 {
645 c = *p++;
646
647 if (c == ']')
648 break;
649
650 if (c == '%' && !has_scope_id)
651 {
652 has_scope_id = TRUE;
653 if (p[0] != '2' || p[1] != '5')
654 has_bad_scope_id = TRUE;
655 continue;
656 }
657
658 /* unreserved / sub-delims */
659 if (!(g_ascii_isalnum (c) ||
660 strchr (G_URI_OTHER_UNRESERVED, c) ||
661 strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c) ||
662 c == ':' ||
663 c == '.'))
664 goto error;
665 }
666
667 if (host)
668 {
669 if (has_bad_scope_id)
670 *host = g_strndup (start, p - start - 1);
671 else
672 *host = g_uri_unescape_segment (start, p - 1, NULL);
673 }
674
675 c = *p++;
676 }
677 else
678 {
679 while (1)
680 {
681 c = *p++;
682
683 if (c == ':' ||
684 c == '/' ||
685 c == '?' ||
686 c == '#' ||
687 c == '\0')
688 break;
689
690 /* pct-encoded */
691 if (c == '%')
692 {
693 if (!(g_ascii_isxdigit (p[0]) ||
694 g_ascii_isxdigit (p[1])))
695 goto error;
696
697 p++;
698
699 continue;
700 }
701
702 /* unreserved / sub-delims */
703 if (!(g_ascii_isalnum (c) ||
704 strchr (G_URI_OTHER_UNRESERVED, c) ||
705 strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c)))
706 goto error;
707 }
708
709 if (host)
710 *host = g_uri_unescape_segment (start, p - 1, NULL);
711 }
712
713 if (c == ':')
714 {
715 /* Decode port:
716 * port = *DIGIT
717 */
718 guint tmp = 0;
719
720 while (1)
721 {
722 c = *p++;
723
724 if (c == '/' ||
725 c == '?' ||
726 c == '#' ||
727 c == '\0')
728 break;
729
730 if (!g_ascii_isdigit (c))
731 goto error;
732
733 tmp = (tmp * 10) + (c - '0');
734
735 if (tmp > 65535)
736 goto error;
737 }
738 if (port)
739 *port = (guint16) tmp;
740 }
741
742 g_free (ascii_uri);
743
744 return TRUE;
745
746 error:
747 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
748 "Invalid URI ‘%s’", uri);
749
750 if (host && *host)
751 {
752 g_free (*host);
753 *host = NULL;
754 }
755
756 if (userinfo && *userinfo)
757 {
758 g_free (*userinfo);
759 *userinfo = NULL;
760 }
761
762 g_free (ascii_uri);
763
764 return FALSE;
765 }
766
767 gchar *
_g_uri_from_authority(const gchar * protocol,const gchar * host,guint port,const gchar * userinfo)768 _g_uri_from_authority (const gchar *protocol,
769 const gchar *host,
770 guint port,
771 const gchar *userinfo)
772 {
773 GString *uri;
774
775 uri = g_string_new (protocol);
776 g_string_append (uri, "://");
777
778 if (userinfo)
779 {
780 g_string_append_uri_escaped (uri, userinfo, G_URI_RESERVED_CHARS_ALLOWED_IN_USERINFO, FALSE);
781 g_string_append_c (uri, '@');
782 }
783
784 if (g_hostname_is_non_ascii (host))
785 {
786 gchar *ace_encoded = g_hostname_to_ascii (host);
787
788 if (!ace_encoded)
789 {
790 g_string_free (uri, TRUE);
791 return NULL;
792 }
793 g_string_append (uri, ace_encoded);
794 g_free (ace_encoded);
795 }
796 else if (strchr (host, ':'))
797 g_string_append_printf (uri, "[%s]", host);
798 else
799 g_string_append (uri, host);
800
801 if (port != 0)
802 g_string_append_printf (uri, ":%u", port);
803
804 return g_string_free (uri, FALSE);
805 }
806
807 /**
808 * g_network_address_parse_uri:
809 * @uri: the hostname and optionally a port
810 * @default_port: The default port if none is found in the URI
811 * @error: a pointer to a #GError, or %NULL
812 *
813 * Creates a new #GSocketConnectable for connecting to the given
814 * @uri. May fail and return %NULL in case parsing @uri fails.
815 *
816 * Using this rather than g_network_address_new() or
817 * g_network_address_parse() allows #GSocketClient to determine
818 * when to use application-specific proxy protocols.
819 *
820 * Returns: (transfer full) (type GNetworkAddress): the new
821 * #GNetworkAddress, or %NULL on error
822 *
823 * Since: 2.26
824 */
825 GSocketConnectable *
g_network_address_parse_uri(const gchar * uri,guint16 default_port,GError ** error)826 g_network_address_parse_uri (const gchar *uri,
827 guint16 default_port,
828 GError **error)
829 {
830 GSocketConnectable *conn;
831 gchar *scheme;
832 gchar *hostname;
833 guint16 port;
834
835 if (!_g_uri_parse_authority (uri, &hostname, &port, NULL, error))
836 return NULL;
837
838 if (port == 0)
839 port = default_port;
840
841 scheme = g_uri_parse_scheme (uri);
842
843 conn = g_object_new (G_TYPE_NETWORK_ADDRESS,
844 "hostname", hostname,
845 "port", port,
846 "scheme", scheme,
847 NULL);
848
849 g_free (scheme);
850 g_free (hostname);
851
852 return conn;
853 }
854
855 /**
856 * g_network_address_get_hostname:
857 * @addr: a #GNetworkAddress
858 *
859 * Gets @addr's hostname. This might be either UTF-8 or ASCII-encoded,
860 * depending on what @addr was created with.
861 *
862 * Returns: @addr's hostname
863 *
864 * Since: 2.22
865 */
866 const gchar *
g_network_address_get_hostname(GNetworkAddress * addr)867 g_network_address_get_hostname (GNetworkAddress *addr)
868 {
869 g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), NULL);
870
871 return addr->priv->hostname;
872 }
873
874 /**
875 * g_network_address_get_port:
876 * @addr: a #GNetworkAddress
877 *
878 * Gets @addr's port number
879 *
880 * Returns: @addr's port (which may be 0)
881 *
882 * Since: 2.22
883 */
884 guint16
g_network_address_get_port(GNetworkAddress * addr)885 g_network_address_get_port (GNetworkAddress *addr)
886 {
887 g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), 0);
888
889 return addr->priv->port;
890 }
891
892 /**
893 * g_network_address_get_scheme:
894 * @addr: a #GNetworkAddress
895 *
896 * Gets @addr's scheme
897 *
898 * Returns: @addr's scheme (%NULL if not built from URI)
899 *
900 * Since: 2.26
901 */
902 const gchar *
g_network_address_get_scheme(GNetworkAddress * addr)903 g_network_address_get_scheme (GNetworkAddress *addr)
904 {
905 g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), NULL);
906
907 return addr->priv->scheme;
908 }
909
910 #define G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (_g_network_address_address_enumerator_get_type ())
911 #define G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR, GNetworkAddressAddressEnumerator))
912
913 typedef enum {
914 RESOLVE_STATE_NONE = 0,
915 RESOLVE_STATE_WAITING_ON_IPV4 = 1 << 0,
916 RESOLVE_STATE_WAITING_ON_IPV6 = 1 << 1,
917 } ResolveState;
918
919 typedef struct {
920 GSocketAddressEnumerator parent_instance;
921
922 GNetworkAddress *addr; /* (owned) */
923 GList *addresses; /* (owned) (nullable) */
924 GList *current_item; /* (unowned) (nullable) */
925 GTask *queued_task; /* (owned) (nullable) */
926 GTask *waiting_task; /* (owned) (nullable) */
927 GError *last_error; /* (owned) (nullable) */
928 GSource *wait_source; /* (owned) (nullable) */
929 GMainContext *context; /* (owned) (nullable) */
930 ResolveState state;
931 } GNetworkAddressAddressEnumerator;
932
933 typedef struct {
934 GSocketAddressEnumeratorClass parent_class;
935
936 } GNetworkAddressAddressEnumeratorClass;
937
938 static GType _g_network_address_address_enumerator_get_type (void);
G_DEFINE_TYPE(GNetworkAddressAddressEnumerator,_g_network_address_address_enumerator,G_TYPE_SOCKET_ADDRESS_ENUMERATOR)939 G_DEFINE_TYPE (GNetworkAddressAddressEnumerator, _g_network_address_address_enumerator, G_TYPE_SOCKET_ADDRESS_ENUMERATOR)
940
941 static void
942 g_network_address_address_enumerator_finalize (GObject *object)
943 {
944 GNetworkAddressAddressEnumerator *addr_enum =
945 G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (object);
946
947 if (addr_enum->wait_source)
948 {
949 g_source_destroy (addr_enum->wait_source);
950 g_clear_pointer (&addr_enum->wait_source, g_source_unref);
951 }
952 g_clear_object (&addr_enum->queued_task);
953 g_clear_object (&addr_enum->waiting_task);
954 g_clear_error (&addr_enum->last_error);
955 g_object_unref (addr_enum->addr);
956 g_clear_pointer (&addr_enum->context, g_main_context_unref);
957 g_list_free_full (addr_enum->addresses, g_object_unref);
958
959 G_OBJECT_CLASS (_g_network_address_address_enumerator_parent_class)->finalize (object);
960 }
961
962 static inline GSocketFamily
get_address_family(GInetSocketAddress * address)963 get_address_family (GInetSocketAddress *address)
964 {
965 return g_inet_address_get_family (g_inet_socket_address_get_address (address));
966 }
967
968 static void
list_split_families(GList * list,GList ** out_ipv4,GList ** out_ipv6)969 list_split_families (GList *list,
970 GList **out_ipv4,
971 GList **out_ipv6)
972 {
973 g_assert (out_ipv4);
974 g_assert (out_ipv6);
975
976 while (list)
977 {
978 GSocketFamily family = get_address_family (list->data);
979 switch (family)
980 {
981 case G_SOCKET_FAMILY_IPV4:
982 *out_ipv4 = g_list_prepend (*out_ipv4, list->data);
983 break;
984 case G_SOCKET_FAMILY_IPV6:
985 *out_ipv6 = g_list_prepend (*out_ipv6, list->data);
986 break;
987 case G_SOCKET_FAMILY_INVALID:
988 case G_SOCKET_FAMILY_UNIX:
989 g_assert_not_reached ();
990 }
991
992 list = g_list_next (list);
993 }
994
995 *out_ipv4 = g_list_reverse (*out_ipv4);
996 *out_ipv6 = g_list_reverse (*out_ipv6);
997 }
998
999 static GList *
list_interleave_families(GList * list1,GList * list2)1000 list_interleave_families (GList *list1,
1001 GList *list2)
1002 {
1003 GList *interleaved = NULL;
1004
1005 while (list1 || list2)
1006 {
1007 if (list1)
1008 {
1009 interleaved = g_list_append (interleaved, list1->data);
1010 list1 = g_list_delete_link (list1, list1);
1011 }
1012 if (list2)
1013 {
1014 interleaved = g_list_append (interleaved, list2->data);
1015 list2 = g_list_delete_link (list2, list2);
1016 }
1017 }
1018
1019 return interleaved;
1020 }
1021
1022 /* list_copy_interleaved:
1023 * @list: (transfer container): List to copy
1024 *
1025 * Does a shallow copy of a list with address families interleaved.
1026 *
1027 * For example:
1028 * Input: [ipv6, ipv6, ipv4, ipv4]
1029 * Output: [ipv6, ipv4, ipv6, ipv4]
1030 *
1031 * Returns: (transfer container): A new list
1032 */
1033 static GList *
list_copy_interleaved(GList * list)1034 list_copy_interleaved (GList *list)
1035 {
1036 GList *ipv4 = NULL, *ipv6 = NULL;
1037
1038 list_split_families (list, &ipv4, &ipv6);
1039 return list_interleave_families (ipv6, ipv4);
1040 }
1041
1042 /* list_concat_interleaved:
1043 * @parent_list: (transfer container): Already existing list
1044 * @current_item: (transfer container): Item after which to resort
1045 * @new_list: (transfer container): New list to be interleaved and concatenated
1046 *
1047 * This differs from g_list_concat() + list_copy_interleaved() in that it sorts
1048 * items in the previous list starting from @current_item and concats the results
1049 * to @parent_list.
1050 *
1051 * Returns: (transfer container): New start of list
1052 */
1053 static GList *
list_concat_interleaved(GList * parent_list,GList * current_item,GList * new_list)1054 list_concat_interleaved (GList *parent_list,
1055 GList *current_item,
1056 GList *new_list)
1057 {
1058 GList *ipv4 = NULL, *ipv6 = NULL, *interleaved, *trailing = NULL;
1059 GSocketFamily last_family = G_SOCKET_FAMILY_IPV4; /* Default to starting with ipv6 */
1060
1061 if (current_item)
1062 {
1063 last_family = get_address_family (current_item->data);
1064
1065 /* Unused addresses will get removed, resorted, then readded */
1066 trailing = g_list_next (current_item);
1067 current_item->next = NULL;
1068 }
1069
1070 list_split_families (trailing, &ipv4, &ipv6);
1071 list_split_families (new_list, &ipv4, &ipv6);
1072 g_list_free (new_list);
1073
1074 if (trailing)
1075 g_list_free (trailing);
1076
1077 if (last_family == G_SOCKET_FAMILY_IPV4)
1078 interleaved = list_interleave_families (ipv6, ipv4);
1079 else
1080 interleaved = list_interleave_families (ipv4, ipv6);
1081
1082 return g_list_concat (parent_list, interleaved);
1083 }
1084
1085 static void
maybe_update_address_cache(GNetworkAddressAddressEnumerator * addr_enum,GResolver * resolver)1086 maybe_update_address_cache (GNetworkAddressAddressEnumerator *addr_enum,
1087 GResolver *resolver)
1088 {
1089 GList *addresses, *p;
1090
1091 /* Only cache complete results */
1092 if (addr_enum->state & RESOLVE_STATE_WAITING_ON_IPV4 || addr_enum->state & RESOLVE_STATE_WAITING_ON_IPV6)
1093 return;
1094
1095 /* The enumerators list will not necessarily be fully sorted */
1096 addresses = list_copy_interleaved (addr_enum->addresses);
1097 for (p = addresses; p; p = p->next)
1098 g_object_ref (p->data);
1099
1100 g_network_address_set_cached_addresses (addr_enum->addr, g_steal_pointer (&addresses), g_resolver_get_serial (resolver));
1101 }
1102
1103 static void
g_network_address_address_enumerator_add_addresses(GNetworkAddressAddressEnumerator * addr_enum,GList * addresses,GResolver * resolver)1104 g_network_address_address_enumerator_add_addresses (GNetworkAddressAddressEnumerator *addr_enum,
1105 GList *addresses,
1106 GResolver *resolver)
1107 {
1108 GList *new_addresses = inet_addresses_to_inet_socket_addresses (addr_enum->addr, addresses);
1109
1110 if (addr_enum->addresses == NULL)
1111 addr_enum->addresses = g_steal_pointer (&new_addresses);
1112 else
1113 addr_enum->addresses = list_concat_interleaved (addr_enum->addresses, addr_enum->current_item, g_steal_pointer (&new_addresses));
1114
1115 maybe_update_address_cache (addr_enum, resolver);
1116 }
1117
1118 static gpointer
copy_object(gconstpointer src,gpointer user_data)1119 copy_object (gconstpointer src,
1120 gpointer user_data)
1121 {
1122 return g_object_ref (G_OBJECT (src));
1123 }
1124
1125 static GSocketAddress *
init_and_query_next_address(GNetworkAddressAddressEnumerator * addr_enum)1126 init_and_query_next_address (GNetworkAddressAddressEnumerator *addr_enum)
1127 {
1128 GList *next_item;
1129
1130 if (addr_enum->addresses == NULL)
1131 addr_enum->addresses = g_list_copy_deep (addr_enum->addr->priv->cached_sockaddrs,
1132 copy_object, NULL);
1133
1134 /* We always want to look at the next item at call time to get the latest results.
1135 That means that sometimes ->next is NULL this call but is valid next call.
1136 */
1137 if (addr_enum->current_item == NULL)
1138 next_item = addr_enum->current_item = addr_enum->addresses;
1139 else
1140 next_item = g_list_next (addr_enum->current_item);
1141
1142 if (next_item)
1143 {
1144 addr_enum->current_item = next_item;
1145 return g_object_ref (addr_enum->current_item->data);
1146 }
1147 else
1148 return NULL;
1149 }
1150
1151 static GSocketAddress *
g_network_address_address_enumerator_next(GSocketAddressEnumerator * enumerator,GCancellable * cancellable,GError ** error)1152 g_network_address_address_enumerator_next (GSocketAddressEnumerator *enumerator,
1153 GCancellable *cancellable,
1154 GError **error)
1155 {
1156 GNetworkAddressAddressEnumerator *addr_enum =
1157 G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (enumerator);
1158
1159 if (addr_enum->addresses == NULL)
1160 {
1161 GNetworkAddress *addr = addr_enum->addr;
1162 GResolver *resolver = g_resolver_get_default ();
1163 gint64 serial = g_resolver_get_serial (resolver);
1164
1165 if (addr->priv->resolver_serial != 0 &&
1166 addr->priv->resolver_serial != serial)
1167 {
1168 /* Resolver has reloaded, discard cached addresses */
1169 g_list_free_full (addr->priv->cached_sockaddrs, g_object_unref);
1170 addr->priv->cached_sockaddrs = NULL;
1171 }
1172
1173 if (!addr->priv->cached_sockaddrs)
1174 g_network_address_parse_sockaddr (addr);
1175 if (!addr->priv->cached_sockaddrs)
1176 {
1177 GList *addresses;
1178
1179 addresses = g_resolver_lookup_by_name (resolver,
1180 addr->priv->hostname,
1181 cancellable, error);
1182 if (!addresses)
1183 {
1184 g_object_unref (resolver);
1185 return NULL;
1186 }
1187
1188 g_network_address_set_cached_addresses (addr, g_steal_pointer (&addresses), serial);
1189 }
1190
1191 g_object_unref (resolver);
1192 }
1193
1194 return init_and_query_next_address (addr_enum);
1195 }
1196
1197 static void
complete_queued_task(GNetworkAddressAddressEnumerator * addr_enum,GTask * task,GError * error)1198 complete_queued_task (GNetworkAddressAddressEnumerator *addr_enum,
1199 GTask *task,
1200 GError *error)
1201 {
1202 if (error)
1203 g_task_return_error (task, error);
1204 else
1205 {
1206 GSocketAddress *sockaddr = init_and_query_next_address (addr_enum);
1207 g_task_return_pointer (task, g_steal_pointer (&sockaddr), g_object_unref);
1208 }
1209 g_object_unref (task);
1210 }
1211
1212 static int
on_address_timeout(gpointer user_data)1213 on_address_timeout (gpointer user_data)
1214 {
1215 GNetworkAddressAddressEnumerator *addr_enum = user_data;
1216
1217 /* Upon completion it may get unref'd by the owner */
1218 g_object_ref (addr_enum);
1219
1220 if (addr_enum->queued_task != NULL)
1221 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->queued_task),
1222 g_steal_pointer (&addr_enum->last_error));
1223 else if (addr_enum->waiting_task != NULL)
1224 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->waiting_task),
1225 NULL);
1226
1227 g_clear_pointer (&addr_enum->wait_source, g_source_unref);
1228 g_object_unref (addr_enum);
1229
1230 return G_SOURCE_REMOVE;
1231 }
1232
1233 static void
got_ipv6_addresses(GObject * source_object,GAsyncResult * result,gpointer user_data)1234 got_ipv6_addresses (GObject *source_object,
1235 GAsyncResult *result,
1236 gpointer user_data)
1237 {
1238 GNetworkAddressAddressEnumerator *addr_enum = user_data;
1239 GResolver *resolver = G_RESOLVER (source_object);
1240 GList *addresses;
1241 GError *error = NULL;
1242
1243 addr_enum->state ^= RESOLVE_STATE_WAITING_ON_IPV6;
1244
1245 addresses = g_resolver_lookup_by_name_with_flags_finish (resolver, result, &error);
1246 if (!error)
1247 g_network_address_address_enumerator_add_addresses (addr_enum, g_steal_pointer (&addresses), resolver);
1248 else
1249 g_debug ("IPv6 DNS error: %s", error->message);
1250
1251 /* If ipv4 was first and waiting on us it can stop waiting */
1252 if (addr_enum->wait_source)
1253 {
1254 g_source_destroy (addr_enum->wait_source);
1255 g_clear_pointer (&addr_enum->wait_source, g_source_unref);
1256 }
1257
1258 /* If we got an error before ipv4 then let its response handle it.
1259 * If we get ipv6 response first or error second then
1260 * immediately complete the task.
1261 */
1262 if (error != NULL && !addr_enum->last_error && (addr_enum->state & RESOLVE_STATE_WAITING_ON_IPV4))
1263 {
1264 /* ipv6 lookup failed, but ipv4 is still outstanding. wait. */
1265 addr_enum->last_error = g_steal_pointer (&error);
1266 }
1267 else if (addr_enum->waiting_task != NULL)
1268 {
1269 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->waiting_task), NULL);
1270 }
1271 else if (addr_enum->queued_task != NULL)
1272 {
1273 GError *task_error = NULL;
1274
1275 /* If both errored just use the ipv6 one,
1276 but if ipv6 errored and ipv4 didn't we don't error */
1277 if (error != NULL && addr_enum->last_error)
1278 task_error = g_steal_pointer (&error);
1279
1280 g_clear_error (&addr_enum->last_error);
1281 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->queued_task),
1282 g_steal_pointer (&task_error));
1283 }
1284
1285 g_clear_error (&error);
1286 g_object_unref (addr_enum);
1287 }
1288
1289 static void
got_ipv4_addresses(GObject * source_object,GAsyncResult * result,gpointer user_data)1290 got_ipv4_addresses (GObject *source_object,
1291 GAsyncResult *result,
1292 gpointer user_data)
1293 {
1294 GNetworkAddressAddressEnumerator *addr_enum = user_data;
1295 GResolver *resolver = G_RESOLVER (source_object);
1296 GList *addresses;
1297 GError *error = NULL;
1298
1299 addr_enum->state ^= RESOLVE_STATE_WAITING_ON_IPV4;
1300
1301 addresses = g_resolver_lookup_by_name_with_flags_finish (resolver, result, &error);
1302 if (!error)
1303 g_network_address_address_enumerator_add_addresses (addr_enum, g_steal_pointer (&addresses), resolver);
1304 else
1305 g_debug ("IPv4 DNS error: %s", error->message);
1306
1307 if (addr_enum->wait_source)
1308 {
1309 g_source_destroy (addr_enum->wait_source);
1310 g_clear_pointer (&addr_enum->wait_source, g_source_unref);
1311 }
1312
1313 /* If ipv6 already came in and errored then we return.
1314 * If ipv6 returned successfully then we don't need to do anything unless
1315 * another enumeration was waiting on us.
1316 * If ipv6 hasn't come we should wait a short while for it as RFC 8305 suggests.
1317 */
1318 if (addr_enum->last_error)
1319 {
1320 g_assert (addr_enum->queued_task);
1321 g_clear_error (&addr_enum->last_error);
1322 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->queued_task),
1323 g_steal_pointer (&error));
1324 }
1325 else if (addr_enum->waiting_task != NULL)
1326 {
1327 complete_queued_task (addr_enum, g_steal_pointer (&addr_enum->waiting_task), NULL);
1328 }
1329 else if (addr_enum->queued_task != NULL)
1330 {
1331 addr_enum->last_error = g_steal_pointer (&error);
1332 addr_enum->wait_source = g_timeout_source_new (HAPPY_EYEBALLS_RESOLUTION_DELAY_MS);
1333 g_source_set_callback (addr_enum->wait_source,
1334 on_address_timeout,
1335 addr_enum, NULL);
1336 g_source_attach (addr_enum->wait_source, addr_enum->context);
1337 }
1338
1339 g_clear_error (&error);
1340 g_object_unref (addr_enum);
1341 }
1342
1343 static void
g_network_address_address_enumerator_next_async(GSocketAddressEnumerator * enumerator,GCancellable * cancellable,GAsyncReadyCallback callback,gpointer user_data)1344 g_network_address_address_enumerator_next_async (GSocketAddressEnumerator *enumerator,
1345 GCancellable *cancellable,
1346 GAsyncReadyCallback callback,
1347 gpointer user_data)
1348 {
1349 GNetworkAddressAddressEnumerator *addr_enum =
1350 G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (enumerator);
1351 GSocketAddress *sockaddr;
1352 GTask *task;
1353
1354 task = g_task_new (addr_enum, cancellable, callback, user_data);
1355 g_task_set_source_tag (task, g_network_address_address_enumerator_next_async);
1356
1357 if (addr_enum->addresses == NULL && addr_enum->state == RESOLVE_STATE_NONE)
1358 {
1359 GNetworkAddress *addr = addr_enum->addr;
1360 GResolver *resolver = g_resolver_get_default ();
1361 gint64 serial = g_resolver_get_serial (resolver);
1362
1363 if (addr->priv->resolver_serial != 0 &&
1364 addr->priv->resolver_serial != serial)
1365 {
1366 /* Resolver has reloaded, discard cached addresses */
1367 g_list_free_full (addr->priv->cached_sockaddrs, g_object_unref);
1368 addr->priv->cached_sockaddrs = NULL;
1369 }
1370
1371 if (addr->priv->cached_sockaddrs == NULL)
1372 {
1373 if (g_network_address_parse_sockaddr (addr))
1374 complete_queued_task (addr_enum, task, NULL);
1375 else
1376 {
1377 /* It does not make sense for this to be called multiple
1378 * times before the initial callback has been called */
1379 g_assert (addr_enum->queued_task == NULL);
1380
1381 addr_enum->state = RESOLVE_STATE_WAITING_ON_IPV4 | RESOLVE_STATE_WAITING_ON_IPV6;
1382 addr_enum->queued_task = g_steal_pointer (&task);
1383 /* Look up in parallel as per RFC 8305 */
1384 g_resolver_lookup_by_name_with_flags_async (resolver,
1385 addr->priv->hostname,
1386 G_RESOLVER_NAME_LOOKUP_FLAGS_IPV6_ONLY,
1387 cancellable,
1388 got_ipv6_addresses, g_object_ref (addr_enum));
1389 g_resolver_lookup_by_name_with_flags_async (resolver,
1390 addr->priv->hostname,
1391 G_RESOLVER_NAME_LOOKUP_FLAGS_IPV4_ONLY,
1392 cancellable,
1393 got_ipv4_addresses, g_object_ref (addr_enum));
1394 }
1395 g_object_unref (resolver);
1396 return;
1397 }
1398
1399 g_object_unref (resolver);
1400 }
1401
1402 sockaddr = init_and_query_next_address (addr_enum);
1403 if (sockaddr == NULL && (addr_enum->state & RESOLVE_STATE_WAITING_ON_IPV4 ||
1404 addr_enum->state & RESOLVE_STATE_WAITING_ON_IPV6))
1405 {
1406 addr_enum->waiting_task = task;
1407 }
1408 else
1409 {
1410 g_task_return_pointer (task, sockaddr, g_object_unref);
1411 g_object_unref (task);
1412 }
1413 }
1414
1415 static GSocketAddress *
g_network_address_address_enumerator_next_finish(GSocketAddressEnumerator * enumerator,GAsyncResult * result,GError ** error)1416 g_network_address_address_enumerator_next_finish (GSocketAddressEnumerator *enumerator,
1417 GAsyncResult *result,
1418 GError **error)
1419 {
1420 g_return_val_if_fail (g_task_is_valid (result, enumerator), NULL);
1421
1422 return g_task_propagate_pointer (G_TASK (result), error);
1423 }
1424
1425 static void
_g_network_address_address_enumerator_init(GNetworkAddressAddressEnumerator * enumerator)1426 _g_network_address_address_enumerator_init (GNetworkAddressAddressEnumerator *enumerator)
1427 {
1428 enumerator->context = g_main_context_ref_thread_default ();
1429 }
1430
1431 static void
_g_network_address_address_enumerator_class_init(GNetworkAddressAddressEnumeratorClass * addrenum_class)1432 _g_network_address_address_enumerator_class_init (GNetworkAddressAddressEnumeratorClass *addrenum_class)
1433 {
1434 GObjectClass *object_class = G_OBJECT_CLASS (addrenum_class);
1435 GSocketAddressEnumeratorClass *enumerator_class =
1436 G_SOCKET_ADDRESS_ENUMERATOR_CLASS (addrenum_class);
1437
1438 enumerator_class->next = g_network_address_address_enumerator_next;
1439 enumerator_class->next_async = g_network_address_address_enumerator_next_async;
1440 enumerator_class->next_finish = g_network_address_address_enumerator_next_finish;
1441 object_class->finalize = g_network_address_address_enumerator_finalize;
1442 }
1443
1444 static GSocketAddressEnumerator *
g_network_address_connectable_enumerate(GSocketConnectable * connectable)1445 g_network_address_connectable_enumerate (GSocketConnectable *connectable)
1446 {
1447 GNetworkAddressAddressEnumerator *addr_enum;
1448
1449 addr_enum = g_object_new (G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR, NULL);
1450 addr_enum->addr = g_object_ref (G_NETWORK_ADDRESS (connectable));
1451
1452 return (GSocketAddressEnumerator *)addr_enum;
1453 }
1454
1455 static GSocketAddressEnumerator *
g_network_address_connectable_proxy_enumerate(GSocketConnectable * connectable)1456 g_network_address_connectable_proxy_enumerate (GSocketConnectable *connectable)
1457 {
1458 GNetworkAddress *self = G_NETWORK_ADDRESS (connectable);
1459 GSocketAddressEnumerator *proxy_enum;
1460 gchar *uri;
1461
1462 uri = _g_uri_from_authority (self->priv->scheme ? self->priv->scheme : "none",
1463 self->priv->hostname,
1464 self->priv->port,
1465 NULL);
1466
1467 proxy_enum = g_object_new (G_TYPE_PROXY_ADDRESS_ENUMERATOR,
1468 "connectable", connectable,
1469 "uri", uri,
1470 NULL);
1471
1472 g_free (uri);
1473
1474 return proxy_enum;
1475 }
1476
1477 static gchar *
g_network_address_connectable_to_string(GSocketConnectable * connectable)1478 g_network_address_connectable_to_string (GSocketConnectable *connectable)
1479 {
1480 GNetworkAddress *addr;
1481 const gchar *scheme;
1482 guint16 port;
1483 GString *out; /* owned */
1484
1485 addr = G_NETWORK_ADDRESS (connectable);
1486 out = g_string_new ("");
1487
1488 scheme = g_network_address_get_scheme (addr);
1489 if (scheme != NULL)
1490 g_string_append_printf (out, "%s:", scheme);
1491
1492 g_string_append (out, g_network_address_get_hostname (addr));
1493
1494 port = g_network_address_get_port (addr);
1495 if (port != 0)
1496 g_string_append_printf (out, ":%u", port);
1497
1498 return g_string_free (out, FALSE);
1499 }
1500