3 * Copyright (c) 2000-2003 Intel Corporation
4 * Copyright (c) 2006-2007 Sony Corporation
5 * Copyright (c) 2008-2009 Atheros Communications
6 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
8 * See below for more details on licensing and code history.
12 * This has been greatly stripped down from the original file
13 * (upnp_wps_device.c) by Ted Merrill, Atheros Communications
14 * in order to eliminate use of the bulky libupnp library etc.
17 * upnp_wps_device.c is/was a shim layer between wps_opt_upnp.c and
18 * the libupnp library.
19 * The layering (by Sony) was well done; only a very minor modification
20 * to API of upnp_wps_device.c was required.
21 * libupnp was found to be undesirable because:
22 * -- It consumed too much code and data space
23 * -- It uses multiple threads, making debugging more difficult
24 * and possibly reducing reliability.
25 * -- It uses static variables and only supports one instance.
26 * The shim and libupnp are here replaced by special code written
27 * specifically for the needs of hostapd.
28 * Various shortcuts can and are taken to keep the code size small.
29 * Generally, execution time is not as crucial.
32 * -- UPnP requires that we be able to resolve domain names.
33 * While uncommon, if we have to do it then it will stall the entire
34 * hostapd program, which is bad.
35 * This is because we use the standard linux getaddrinfo() function
36 * which is syncronous.
37 * An asyncronous solution would be to use the free "ares" library.
38 * -- Does not have a robust output buffering scheme. Uses a single
39 * fixed size output buffer per TCP/HTTP connection, with possible (although
40 * unlikely) possibility of overflow and likely excessive use of RAM.
41 * A better solution would be to write the HTTP output as a buffered stream,
42 * using chunking: (handle header specially, then) generate data with
43 * a printf-like function into a buffer, catching buffer full condition,
44 * then send it out surrounded by http chunking.
45 * -- There is some code that could be separated out into the common
46 * library to be shared with wpa_supplicant.
47 * -- Needs renaming with module prefix to avoid polluting the debugger
48 * namespace and causing possible collisions with other static fncs
49 * and structure declarations when using the debugger.
50 * -- The http error code generation is pretty bogus, hopefully noone cares.
52 * Author: Ted Merrill, Atheros Communications, based upon earlier work
53 * as explained above and below.
56 * Copyright 2008 Atheros Communications.
58 * The original header (of upnp_wps_device.c) reads:
60 * Copyright (c) 2006-2007 Sony Corporation. All Rights Reserved.
62 * File Name: upnp_wps_device.c
63 * Description: EAP-WPS UPnP device source
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
69 * * Redistributions of source code must retain the above copyright
70 * notice, this list of conditions and the following disclaimer.
71 * * Redistributions in binary form must reproduce the above copyright
72 * notice, this list of conditions and the following disclaimer in
73 * the documentation and/or other materials provided with the
75 * * Neither the name of Sony Corporation nor the names of its
76 * contributors may be used to endorse or promote products derived
77 * from this software without specific prior written permission.
79 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
80 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
81 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
82 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
83 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
84 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
85 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
86 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
87 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
88 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
89 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
91 * Portions from Intel libupnp files, e.g. genlib/net/http/httpreadwrite.c
94 * Copyright (c) 2000-2003 Intel Corporation
95 * All rights reserved.
97 * Redistribution and use in source and binary forms, with or without
98 * modification, are permitted provided that the following conditions are met:
100 * * Redistributions of source code must retain the above copyright notice,
101 * this list of conditions and the following disclaimer.
102 * * Redistributions in binary form must reproduce the above copyright notice,
103 * this list of conditions and the following disclaimer in the documentation
104 * and/or other materials provided with the distribution.
105 * * Neither name of Intel Corporation nor the names of its contributors
106 * may be used to endorse or promote products derived from this software
107 * without specific prior written permission.
109 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
110 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
111 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
112 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
113 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
114 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
115 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
116 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
117 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
118 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
119 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
123 * Overview of WPS over UPnP:
125 * UPnP is a protocol that allows devices to discover each other and control
126 * each other. In UPnP terminology, a device is either a "device" (a server
127 * that provides information about itself and allows itself to be controlled)
128 * or a "control point" (a client that controls "devices") or possibly both.
129 * This file implements a UPnP "device".
131 * For us, we use mostly basic UPnP discovery, but the control part of interest
132 * is WPS carried via UPnP messages. There is quite a bit of basic UPnP
133 * discovery to do before we can get to WPS, however.
135 * UPnP discovery begins with "devices" send out multicast UDP packets to a
136 * certain fixed multicast IP address and port, and "control points" sending
137 * out other such UDP packets.
139 * The packets sent by devices are NOTIFY packets (not to be confused with TCP
140 * NOTIFY packets that are used later) and those sent by control points are
141 * M-SEARCH packets. These packets contain a simple HTTP style header. The
142 * packets are sent redundantly to get around packet loss. Devices respond to
143 * M-SEARCH packets with HTTP-like UDP packets containing HTTP/1.1 200 OK
144 * messages, which give similar information as the UDP NOTIFY packets.
146 * The above UDP packets advertise the (arbitrary) TCP ports that the
147 * respective parties will listen to. The control point can then do a HTTP
148 * SUBSCRIBE (something like an HTTP PUT) after which the device can do a
149 * separate HTTP NOTIFY (also like an HTTP PUT) to do event messaging.
151 * The control point will also do HTTP GET of the "device file" listed in the
152 * original UDP information from the device (see UPNP_WPS_DEVICE_XML_FILE
153 * data), and based on this will do additional GETs... HTTP POSTs are done to
156 * Beyond some basic information in HTTP headers, additional information is in
157 * the HTTP bodies, in a format set by the SOAP and XML standards, a markup
158 * language related to HTML used for web pages. This language is intended to
159 * provide the ultimate in self-documentation by providing a universal
160 * namespace based on pseudo-URLs called URIs. Note that although a URI looks
161 * like a URL (a web address), they are never accessed as such but are used
162 * only as identifiers.
164 * The POST of a GetDeviceInfo gets information similar to what might be
165 * obtained from a probe request or response on Wi-Fi. WPS messages M1-M8
166 * are passed via a POST of a PutMessage; the M1-M8 WPS messages are converted
167 * to a bin64 ascii representation for encapsulation. When proxying messages,
168 * WLANEvent and PutWLANResponse are used.
170 * This of course glosses over a lot of details.
173 #include "includes.h"
178 #include <sys/ioctl.h>
185 #include "wps_upnp.h"
186 #include "wps_upnp_i.h"
190 * UPnP allows a client ("control point") to send a server like us ("device")
191 * a domain name for registration, and we are supposed to resolve it. This is
192 * bad because, using the standard Linux library, we will stall the entire
193 * hostapd waiting for resolution.
195 * The "correct" solution would be to use an event driven library for domain
196 * name resolution such as "ares". However, this would increase code size
197 * further. Since it is unlikely that we'll actually see such domain names, we
198 * can just refuse to accept them.
200 #define NO_DOMAIN_NAME_RESOLUTION 1 /* 1 to allow only dotted ip addresses */
204 * UPnP does not scale well. If we were in a room with thousands of control
205 * points then potentially we could be expected to handle subscriptions for
206 * each of them, which would exhaust our memory. So we must set a limit. In
207 * practice we are unlikely to see more than one or two.
209 #define MAX_SUBSCRIPTIONS 4 /* how many subscribing clients we handle */
210 #define MAX_ADDR_PER_SUBSCRIPTION 8
213 /* Write the current date/time per RFC */
214 void format_date(struct wpabuf *buf)
216 const char *weekday_str = "Sun\0Mon\0Tue\0Wed\0Thu\0Fri\0Sat";
217 const char *month_str = "Jan\0Feb\0Mar\0Apr\0May\0Jun\0"
218 "Jul\0Aug\0Sep\0Oct\0Nov\0Dec";
224 wpabuf_printf(buf, "%s, %02d %s %d %02d:%02d:%02d GMT",
225 &weekday_str[date->tm_wday * 4], date->tm_mday,
226 &month_str[date->tm_mon * 4], date->tm_year + 1900,
227 date->tm_hour, date->tm_min, date->tm_sec);
231 /***************************************************************************
232 * UUIDs (unique identifiers)
234 * These are supposed to be unique in all the world.
235 * Sometimes permanent ones are used, sometimes temporary ones
236 * based on random numbers... there are different rules for valid content
237 * of different types.
238 * Each uuid is 16 bytes long.
239 **************************************************************************/
241 /* uuid_make -- construct a random UUID
242 * The UPnP documents don't seem to offer any guidelines as to which method to
243 * use for constructing UUIDs for subscriptions. Presumably any method from
244 * rfc4122 is good enough; I've chosen random number method.
246 static void uuid_make(u8 uuid[UUID_LEN])
248 os_get_random(uuid, UUID_LEN);
250 /* Replace certain bits as specified in rfc4122 or X.667 */
251 uuid[6] &= 0x0f; uuid[6] |= (4 << 4); /* version 4 == random gen */
252 uuid[8] &= 0x3f; uuid[8] |= 0x80;
257 * Subscriber address handling.
258 * Since a subscriber may have an arbitrary number of addresses, we have to
259 * add a bunch of code to handle them.
261 * Addresses are passed in text, and MAY be domain names instead of the (usual
262 * and expected) dotted IP addresses. Resolving domain names consumes a lot of
263 * resources. Worse, we are currently using the standard Linux getaddrinfo()
264 * which will block the entire program until complete or timeout! The proper
265 * solution would be to use the "ares" library or similar with more state
266 * machine steps etc. or just disable domain name resolution by setting
267 * NO_DOMAIN_NAME_RESOLUTION to 1 at top of this file.
270 /* subscr_addr_delete -- delete single unlinked subscriber address
271 * (be sure to unlink first if need be)
273 static void subscr_addr_delete(struct subscr_addr *a)
276 * Note: do NOT free domain_and_port or path because they point to
277 * memory within the allocation of "a".
283 /* subscr_addr_unlink -- unlink subscriber address from linked list */
284 static void subscr_addr_unlink(struct subscription *s, struct subscr_addr *a)
286 struct subscr_addr **listp = &s->addr_list;
288 a->next->prev = a->prev;
289 a->prev->next = a->next;
294 assert(s->n_addr == 0);
302 /* subscr_addr_free_all -- unlink and delete list of subscriber addresses. */
303 static void subscr_addr_free_all(struct subscription *s)
305 struct subscr_addr **listp = &s->addr_list;
306 struct subscr_addr *a;
307 while ((a = *listp) != NULL) {
308 subscr_addr_unlink(s, a);
309 subscr_addr_delete(a);
314 /* subscr_addr_link -- add subscriber address to list of addresses */
315 static void subscr_addr_link(struct subscription *s, struct subscr_addr *a)
317 struct subscr_addr **listp = &s->addr_list;
319 if (*listp == NULL) {
320 *listp = a->next = a->prev = a;
323 a->prev = (*listp)->prev;
330 /* subscr_addr_add_url -- add address(es) for one url to subscription */
331 static void subscr_addr_add_url(struct subscription *s, const char *url)
334 char *scratch_mem = NULL;
336 char *domain_and_port;
340 int port = 80; /* port to send to (default is port 80) */
341 struct addrinfo hints;
342 struct addrinfo *result = NULL;
345 struct subscr_addr *a = NULL;
347 /* url MUST begin with http: */
348 if (os_strncasecmp(url, "http://", 7))
352 /* allocate memory for the extra stuff we need */
353 alloc_len = (2 * (os_strlen(url) + 1));
354 scratch_mem = os_zalloc(alloc_len);
355 if (scratch_mem == NULL)
359 domain_and_port = mem;
360 mem += 1 + os_strlen(mem);
361 delim = os_strchr(domain_and_port, '/');
363 *delim++ = 0; /* null terminate domain and port */
366 path = domain_and_port + os_strlen(domain_and_port);
369 strcpy(domain, domain_and_port);
370 delim = strchr(domain, ':');
372 *delim++ = 0; /* null terminate domain */
378 * getaddrinfo does the right thing with dotted decimal notations, or
379 * will resolve domain names. Resolving domain names will unfortunately
380 * hang the entire program until it is resolved or it times out
381 * internal to getaddrinfo; fortunately we think that the use of actual
382 * domain names (vs. dotted decimal notations) should be uncommon.
384 os_memset(&hints, 0, sizeof(struct addrinfo));
385 hints.ai_family = AF_INET; /* IPv4 */
386 hints.ai_socktype = SOCK_STREAM;
387 #if NO_DOMAIN_NAME_RESOLUTION
388 /* Suppress domain name resolutions that would halt
389 * the program for periods of time
391 hints.ai_flags = AI_NUMERICHOST;
393 /* Allow domain name resolution. */
396 hints.ai_protocol = 0; /* Any protocol? */
397 rerr = getaddrinfo(domain, NULL /* fill in port ourselves */,
400 wpa_printf(MSG_INFO, "WPS UPnP: Resolve error %d (%s) on: %s",
401 rerr, gai_strerror(rerr), domain);
404 for (rp = result; rp; rp = rp->ai_next) {
405 /* Limit no. of address to avoid denial of service attack */
406 if (s->n_addr >= MAX_ADDR_PER_SUBSCRIPTION) {
407 wpa_printf(MSG_INFO, "WPS UPnP: subscr_addr_add_url: "
408 "Ignoring excessive addresses");
412 a = os_zalloc(sizeof(*a) + alloc_len);
416 mem = (void *) (a + 1);
417 a->domain_and_port = mem;
418 strcpy(mem, domain_and_port);
419 mem += 1 + strlen(mem);
424 mem += 1 + strlen(mem);
425 os_memcpy(&a->saddr, rp->ai_addr, sizeof(a->saddr));
426 a->saddr.sin_port = htons(port);
428 subscr_addr_link(s, a);
429 a = NULL; /* don't free it below */
434 freeaddrinfo(result);
435 os_free(scratch_mem);
440 /* subscr_addr_list_create -- create list from urls in string.
441 * Each url is enclosed by angle brackets.
443 static void subscr_addr_list_create(struct subscription *s,
444 const char *url_list)
448 while (*url_list == ' ' || *url_list == '\t')
450 if (*url_list != '<')
453 end = os_strchr(url_list, '>');
457 subscr_addr_add_url(s, url_list);
463 int send_wpabuf(int fd, struct wpabuf *buf)
465 wpa_printf(MSG_DEBUG, "WPS UPnP: Send %lu byte message",
466 (unsigned long) wpabuf_len(buf));
468 if (write(fd, wpabuf_head(buf), wpabuf_len(buf)) !=
469 (int) wpabuf_len(buf)) {
470 wpa_printf(MSG_ERROR, "WPS UPnP: Failed to send buffer: "
472 errno, strerror(errno));
480 static void wpabuf_put_property(struct wpabuf *buf, const char *name,
483 wpabuf_put_str(buf, "<e:property>");
484 wpabuf_printf(buf, "<%s>", name);
486 wpabuf_put_str(buf, value);
487 wpabuf_printf(buf, "</%s>", name);
488 wpabuf_put_str(buf, "</e:property>\n");
493 * upnp_wps_device_send_event - Queue event messages for subscribers
494 * @sm: WPS UPnP state machine from upnp_wps_device_init()
496 * This function queues the last WLANEvent to be sent for all currently
497 * subscribed UPnP control points. sm->wlanevent must have been set with the
498 * encoded data before calling this function.
500 static void upnp_wps_device_send_event(struct upnp_wps_device_sm *sm)
502 /* Enqueue event message for all subscribers */
503 struct wpabuf *buf; /* holds event message */
505 struct subscription *s;
506 /* Actually, utf-8 is the default, but it doesn't hurt to specify it */
507 const char *format_head =
508 "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
509 "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
510 const char *format_tail = "</e:propertyset>\n";
512 if (sm->subscriptions == NULL) {
517 /* Determine buffer size needed first */
518 buf_size += os_strlen(format_head);
519 buf_size += 50 + 2 * os_strlen("WLANEvent");
521 buf_size += os_strlen(sm->wlanevent);
522 buf_size += os_strlen(format_tail);
524 buf = wpabuf_alloc(buf_size);
527 wpabuf_put_str(buf, format_head);
528 wpabuf_put_property(buf, "WLANEvent", sm->wlanevent);
529 wpabuf_put_str(buf, format_tail);
531 wpa_printf(MSG_MSGDUMP, "WPS UPnP: WLANEvent message:\n%s",
532 (char *) wpabuf_head(buf));
534 s = sm->subscriptions;
536 if (event_add(s, buf)) {
537 struct subscription *s_old = s;
538 wpa_printf(MSG_INFO, "WPS UPnP: Dropping "
539 "subscriber due to event backlog");
541 subscription_unlink(s_old);
542 subscription_destroy(s_old);
546 } while (s != sm->subscriptions);
553 * Event subscription (subscriber machines register with us to receive event
555 * This is the result of an incoming HTTP over TCP SUBSCRIBE request.
558 /* subscription_unlink -- remove from the active list */
559 void subscription_unlink(struct subscription *s)
561 struct upnp_wps_device_sm *sm = s->sm;
565 sm->subscriptions = NULL;
567 if (sm->subscriptions == s)
568 sm->subscriptions = s->next;
569 s->next->prev = s->prev;
570 s->prev->next = s->next;
572 sm->n_subscriptions--;
576 /* subscription_link_to_end -- link to end of active list
577 * (should have high expiry time!)
579 static void subscription_link_to_end(struct subscription *s)
581 struct upnp_wps_device_sm *sm = s->sm;
583 if (sm->subscriptions) {
584 s->next = sm->subscriptions;
585 s->prev = s->next->prev;
589 sm->subscriptions = s->next = s->prev = s;
591 sm->n_subscriptions++;
595 /* subscription_destroy -- destroy an unlinked subscription
596 * Be sure to unlink first if necessary.
598 void subscription_destroy(struct subscription *s)
600 wpa_printf(MSG_DEBUG, "WPS UPnP: Destroy subscription %p", s);
602 subscr_addr_free_all(s);
604 upnp_er_remove_notification(s);
609 /* subscription_list_age -- remove expired subscriptions */
610 static void subscription_list_age(struct upnp_wps_device_sm *sm, time_t now)
612 struct subscription *s;
613 while ((s = sm->subscriptions) != NULL && s->timeout_time < now) {
614 wpa_printf(MSG_DEBUG, "WPS UPnP: Removing aged subscription");
615 subscription_unlink(s);
616 subscription_destroy(s);
621 /* subscription_find -- return existing subscription matching uuid, if any
622 * returns NULL if not found
624 struct subscription * subscription_find(struct upnp_wps_device_sm *sm,
625 const u8 uuid[UUID_LEN])
627 struct subscription *s0 = sm->subscriptions;
628 struct subscription *s = s0;
633 if (os_memcmp(s->uuid, uuid, UUID_LEN) == 0)
634 return s; /* Found match */
642 static struct wpabuf * build_fake_wsc_ack(void)
644 struct wpabuf *msg = wpabuf_alloc(100);
647 wpabuf_put_u8(msg, UPNP_WPS_WLANEVENT_TYPE_EAP);
648 wpabuf_put_str(msg, "00:00:00:00:00:00");
649 wps_build_version(msg);
650 wps_build_msg_type(msg, WPS_WSC_ACK);
652 wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
653 wpabuf_put_be16(msg, WPS_NONCE_LEN);
654 wpabuf_put(msg, WPS_NONCE_LEN);
655 /* Registrar Nonce */
656 wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
657 wpabuf_put_be16(msg, WPS_NONCE_LEN);
658 wpabuf_put(msg, WPS_NONCE_LEN);
663 /* subscription_first_event -- send format/queue event that is automatically
664 * sent on a new subscription.
666 static int subscription_first_event(struct subscription *s)
669 * Actually, utf-8 is the default, but it doesn't hurt to specify it.
671 * APStatus is apparently a bit set,
672 * 0x1 = configuration change (but is always set?)
673 * 0x10 = ap is locked
675 * Per UPnP spec, we send out the last value of each variable, even
676 * for WLANEvent, whatever it was.
680 int ap_status = 1; /* TODO: add 0x10 if access point is locked */
682 "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
683 "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
684 const char *tail = "</e:propertyset>\n";
687 if (s->sm->wlanevent == NULL) {
689 * There has been no events before the subscription. However,
690 * UPnP device architecture specification requires all the
691 * evented variables to be included, so generate a dummy event
692 * for this particular case using a WSC_ACK and all-zeros
693 * nonces. The ER (UPnP control point) will ignore this, but at
694 * least it will learn that WLANEvent variable will be used in
695 * event notifications in the future.
698 wpa_printf(MSG_DEBUG, "WPS UPnP: Use a fake WSC_ACK as the "
699 "initial WLANEvent");
700 msg = build_fake_wsc_ack();
702 s->sm->wlanevent = (char *)
703 base64_encode(wpabuf_head(msg),
704 wpabuf_len(msg), NULL);
709 wlan_event = s->sm->wlanevent;
710 if (wlan_event == NULL || *wlan_event == '\0') {
711 wpa_printf(MSG_DEBUG, "WPS UPnP: WLANEvent not known for "
712 "initial event message");
715 buf = wpabuf_alloc(500 + os_strlen(wlan_event));
719 wpabuf_put_str(buf, head);
720 wpabuf_put_property(buf, "STAStatus", "1");
721 os_snprintf(txt, sizeof(txt), "%d", ap_status);
722 wpabuf_put_property(buf, "APStatus", txt);
724 wpabuf_put_property(buf, "WLANEvent", wlan_event);
725 wpabuf_put_str(buf, tail);
727 if (event_add(s, buf)) {
738 * subscription_start - Remember a UPnP control point to send events to.
739 * @sm: WPS UPnP state machine from upnp_wps_device_init()
740 * @callback_urls: Callback URLs
741 * Returns: %NULL on error, or pointer to new subscription structure.
743 struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
744 const char *callback_urls)
746 struct subscription *s;
747 time_t now = time(NULL);
748 time_t expire = now + UPNP_SUBSCRIBE_SEC;
750 /* Get rid of expired subscriptions so we have room */
751 subscription_list_age(sm, now);
753 /* If too many subscriptions, remove oldest */
754 if (sm->n_subscriptions >= MAX_SUBSCRIPTIONS) {
755 s = sm->subscriptions;
756 wpa_printf(MSG_INFO, "WPS UPnP: Too many subscriptions, "
758 subscription_unlink(s);
759 subscription_destroy(s);
762 s = os_zalloc(sizeof(*s));
767 s->timeout_time = expire;
769 subscr_addr_list_create(s, callback_urls);
770 /* Add to end of list, since it has the highest expiration time */
771 subscription_link_to_end(s);
772 /* Queue up immediate event message (our last event)
773 * as required by UPnP spec.
775 if (subscription_first_event(s)) {
776 wpa_printf(MSG_INFO, "WPS UPnP: Dropping subscriber due to "
778 subscription_unlink(s);
779 subscription_destroy(s);
782 wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription %p started with %s",
784 /* Schedule sending this */
785 event_send_all_later(sm);
790 /* subscription_renew -- find subscription and reset timeout */
791 struct subscription * subscription_renew(struct upnp_wps_device_sm *sm,
792 const u8 uuid[UUID_LEN])
794 time_t now = time(NULL);
795 time_t expire = now + UPNP_SUBSCRIBE_SEC;
796 struct subscription *s = subscription_find(sm, uuid);
799 wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription renewed");
800 subscription_unlink(s);
801 s->timeout_time = expire;
802 /* add back to end of list, since it now has highest expiry */
803 subscription_link_to_end(s);
809 * upnp_wps_device_send_wlan_event - Event notification
810 * @sm: WPS UPnP state machine from upnp_wps_device_init()
811 * @from_mac_addr: Source (Enrollee) MAC address for the event
812 * @ev_type: Event type
814 * Returns: 0 on success, -1 on failure
816 * Tell external Registrars (UPnP control points) that something happened. In
817 * particular, events include WPS messages from clients that are proxied to
818 * external Registrars.
820 int upnp_wps_device_send_wlan_event(struct upnp_wps_device_sm *sm,
821 const u8 from_mac_addr[ETH_ALEN],
822 enum upnp_wps_wlanevent_type ev_type,
823 const struct wpabuf *msg)
827 const u8 *mac = from_mac_addr;
838 os_snprintf(type, sizeof(type), "%1u", ev_type);
840 raw_len = 1 + 17 + (msg ? wpabuf_len(msg) : 0);
841 raw = os_zalloc(raw_len);
845 *(raw + pos) = (u8) ev_type;
847 os_snprintf(mac_text, sizeof(mac_text), MACSTR, MAC2STR(mac));
848 wpa_printf(MSG_DEBUG, "WPS UPnP: Proxying WLANEvent from %s",
850 os_memcpy(raw + pos, mac_text, 17);
853 os_memcpy(raw + pos, wpabuf_head(msg), wpabuf_len(msg));
854 pos += wpabuf_len(msg);
858 val = (char *) base64_encode(raw, raw_len, &val_len);
862 os_free(sm->wlanevent);
864 upnp_wps_device_send_event(sm);
876 #include <sys/sysctl.h>
877 #include <net/route.h>
878 #include <net/if_dl.h>
880 static int eth_get(const char *device, u8 ea[ETH_ALEN])
882 struct if_msghdr *ifm;
883 struct sockaddr_dl *sdl;
886 int mib[] = { CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0 };
888 if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
890 if ((buf = os_malloc(len)) == NULL)
892 if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
896 for (p = buf; p < buf + len; p += ifm->ifm_msglen) {
897 ifm = (struct if_msghdr *)p;
898 sdl = (struct sockaddr_dl *)(ifm + 1);
899 if (ifm->ifm_type != RTM_IFINFO ||
900 (ifm->ifm_addrs & RTA_IFP) == 0)
902 if (sdl->sdl_family != AF_LINK || sdl->sdl_nlen == 0 ||
903 os_memcmp(sdl->sdl_data, device, sdl->sdl_nlen) != 0)
905 os_memcpy(ea, LLADDR(sdl), sdl->sdl_alen);
910 if (p >= buf + len) {
916 #endif /* __FreeBSD__ */
920 * get_netif_info - Get hw and IP addresses for network device
921 * @net_if: Selected network interface name
922 * @ip_addr: Buffer for returning IP address in network byte order
923 * @ip_addr_text: Buffer for returning a pointer to allocated IP address text
924 * @mac: Buffer for returning MAC address
925 * @mac_addr_text: Buffer for returning allocated MAC address text
926 * Returns: 0 on success, -1 on failure
928 int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text,
929 u8 mac[ETH_ALEN], char **mac_addr_text)
933 struct sockaddr_in *addr;
934 struct in_addr in_addr;
936 *ip_addr_text = os_zalloc(16);
937 *mac_addr_text = os_zalloc(18);
938 if (*ip_addr_text == NULL || *mac_addr_text == NULL)
941 sock = socket(AF_INET, SOCK_DGRAM, 0);
945 os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
946 if (ioctl(sock, SIOCGIFADDR, &req) < 0) {
947 wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFADDR failed: %d (%s)",
948 errno, strerror(errno));
951 addr = (void *) &req.ifr_addr;
952 *ip_addr = addr->sin_addr.s_addr;
953 in_addr.s_addr = *ip_addr;
954 os_snprintf(*ip_addr_text, 16, "%s", inet_ntoa(in_addr));
957 os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
958 if (ioctl(sock, SIOCGIFHWADDR, &req) < 0) {
959 wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFHWADDR failed: "
960 "%d (%s)", errno, strerror(errno));
963 os_memcpy(mac, req.ifr_addr.sa_data, 6);
964 #elif defined(__FreeBSD__)
965 if (eth_get(net_if, mac) < 0) {
966 wpa_printf(MSG_ERROR, "WPS UPnP: Failed to get MAC address");
970 #error MAC address fetch not implemented
972 os_snprintf(*mac_addr_text, 18, MACSTR, MAC2STR(mac));
980 os_free(*ip_addr_text);
981 *ip_addr_text = NULL;
982 os_free(*mac_addr_text);
983 *mac_addr_text = NULL;
989 * upnp_wps_device_stop - Stop WPS UPnP operations on an interface
990 * @sm: WPS UPnP state machine from upnp_wps_device_init()
992 void upnp_wps_device_stop(struct upnp_wps_device_sm *sm)
994 if (!sm || !sm->started)
997 wpa_printf(MSG_DEBUG, "WPS UPnP: Stop device");
998 web_listener_stop(sm);
999 while (sm->msearch_replies)
1000 msearchreply_state_machine_stop(sm->msearch_replies);
1001 while (sm->subscriptions) {
1002 struct subscription *s = sm->subscriptions;
1003 subscription_unlink(s);
1004 subscription_destroy(s);
1007 advertisement_state_machine_stop(sm, 1);
1009 event_send_stop_all(sm);
1010 os_free(sm->wlanevent);
1011 sm->wlanevent = NULL;
1012 os_free(sm->net_if);
1014 os_free(sm->mac_addr_text);
1015 sm->mac_addr_text = NULL;
1016 os_free(sm->ip_addr_text);
1017 sm->ip_addr_text = NULL;
1018 if (sm->multicast_sd >= 0)
1019 close(sm->multicast_sd);
1020 sm->multicast_sd = -1;
1021 ssdp_listener_stop(sm);
1028 * upnp_wps_device_start - Start WPS UPnP operations on an interface
1029 * @sm: WPS UPnP state machine from upnp_wps_device_init()
1030 * @net_if: Selected network interface name
1031 * Returns: 0 on success, -1 on failure
1033 int upnp_wps_device_start(struct upnp_wps_device_sm *sm, char *net_if)
1039 upnp_wps_device_stop(sm);
1041 sm->net_if = strdup(net_if);
1042 sm->multicast_sd = -1;
1045 sm->advertise_count = 0;
1047 /* Fix up linux multicast handling */
1048 if (add_ssdp_network(net_if))
1051 /* Determine which IP and mac address we're using */
1052 if (get_netif_info(net_if,
1053 &sm->ip_addr, &sm->ip_addr_text,
1054 sm->mac_addr, &sm->mac_addr_text)) {
1055 wpa_printf(MSG_INFO, "WPS UPnP: Could not get IP/MAC address "
1056 "for %s. Does it have IP address?", net_if);
1060 /* Listen for incoming TCP connections so that others
1061 * can fetch our "xml files" from us.
1063 if (web_listener_start(sm))
1066 /* Set up for receiving discovery (UDP) packets */
1067 if (ssdp_listener_start(sm))
1070 /* Set up for sending multicast */
1071 if (ssdp_open_multicast(sm) < 0)
1075 * Broadcast NOTIFY messages to let the world know we exist.
1076 * This is done via a state machine since the messages should not be
1077 * all sent out at once.
1079 if (advertisement_state_machine_start(sm))
1085 upnp_wps_device_stop(sm);
1091 * upnp_wps_device_deinit - Deinitialize WPS UPnP
1092 * @sm: WPS UPnP state machine from upnp_wps_device_init()
1094 void upnp_wps_device_deinit(struct upnp_wps_device_sm *sm)
1099 upnp_wps_device_stop(sm);
1102 wps_deinit(sm->peer.wps);
1103 os_free(sm->root_dir);
1104 os_free(sm->desc_url);
1105 os_free(sm->ctx->ap_pin);
1112 * upnp_wps_device_init - Initialize WPS UPnP
1113 * @ctx: callback table; we must eventually free it
1114 * @wps: Pointer to longterm WPS context
1115 * @priv: External context data that will be used in callbacks
1116 * Returns: WPS UPnP state or %NULL on failure
1118 struct upnp_wps_device_sm *
1119 upnp_wps_device_init(struct upnp_wps_device_ctx *ctx, struct wps_context *wps,
1122 struct upnp_wps_device_sm *sm;
1124 sm = os_zalloc(sizeof(*sm));
1126 wpa_printf(MSG_ERROR, "WPS UPnP: upnp_wps_device_init failed");
1139 * upnp_wps_subscribers - Check whether there are any event subscribers
1140 * @sm: WPS UPnP state machine from upnp_wps_device_init()
1141 * Returns: 0 if no subscribers, 1 if subscribers
1143 int upnp_wps_subscribers(struct upnp_wps_device_sm *sm)
1145 return sm->subscriptions != NULL;