+++ /dev/null
-/*
- * UPnP WPS Device
- * Copyright (c) 2000-2003 Intel Corporation
- * Copyright (c) 2006-2007 Sony Corporation
- * Copyright (c) 2008-2009 Atheros Communications
- * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
- *
- * See below for more details on licensing and code history.
- */
-
-/*
- * This has been greatly stripped down from the original file
- * (upnp_wps_device.c) by Ted Merrill, Atheros Communications
- * in order to eliminate use of the bulky libupnp library etc.
- *
- * History:
- * upnp_wps_device.c is/was a shim layer between wps_opt_upnp.c and
- * the libupnp library.
- * The layering (by Sony) was well done; only a very minor modification
- * to API of upnp_wps_device.c was required.
- * libupnp was found to be undesirable because:
- * -- It consumed too much code and data space
- * -- It uses multiple threads, making debugging more difficult
- * and possibly reducing reliability.
- * -- It uses static variables and only supports one instance.
- * The shim and libupnp are here replaced by special code written
- * specifically for the needs of hostapd.
- * Various shortcuts can and are taken to keep the code size small.
- * Generally, execution time is not as crucial.
- *
- * BUGS:
- * -- UPnP requires that we be able to resolve domain names.
- * While uncommon, if we have to do it then it will stall the entire
- * hostapd program, which is bad.
- * This is because we use the standard linux getaddrinfo() function
- * which is syncronous.
- * An asyncronous solution would be to use the free "ares" library.
- * -- Does not have a robust output buffering scheme. Uses a single
- * fixed size output buffer per TCP/HTTP connection, with possible (although
- * unlikely) possibility of overflow and likely excessive use of RAM.
- * A better solution would be to write the HTTP output as a buffered stream,
- * using chunking: (handle header specially, then) generate data with
- * a printf-like function into a buffer, catching buffer full condition,
- * then send it out surrounded by http chunking.
- * -- There is some code that could be separated out into the common
- * library to be shared with wpa_supplicant.
- * -- Needs renaming with module prefix to avoid polluting the debugger
- * namespace and causing possible collisions with other static fncs
- * and structure declarations when using the debugger.
- * -- The http error code generation is pretty bogus, hopefully no one cares.
- *
- * Author: Ted Merrill, Atheros Communications, based upon earlier work
- * as explained above and below.
- *
- * Copyright:
- * Copyright 2008 Atheros Communications.
- *
- * The original header (of upnp_wps_device.c) reads:
- *
- * Copyright (c) 2006-2007 Sony Corporation. All Rights Reserved.
- *
- * File Name: upnp_wps_device.c
- * Description: EAP-WPS UPnP device source
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Sony Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Portions from Intel libupnp files, e.g. genlib/net/http/httpreadwrite.c
- * typical header:
- *
- * Copyright (c) 2000-2003 Intel Corporation
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * * Neither name of Intel Corporation nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/*
- * Overview of WPS over UPnP:
- *
- * UPnP is a protocol that allows devices to discover each other and control
- * each other. In UPnP terminology, a device is either a "device" (a server
- * that provides information about itself and allows itself to be controlled)
- * or a "control point" (a client that controls "devices") or possibly both.
- * This file implements a UPnP "device".
- *
- * For us, we use mostly basic UPnP discovery, but the control part of interest
- * is WPS carried via UPnP messages. There is quite a bit of basic UPnP
- * discovery to do before we can get to WPS, however.
- *
- * UPnP discovery begins with "devices" send out multicast UDP packets to a
- * certain fixed multicast IP address and port, and "control points" sending
- * out other such UDP packets.
- *
- * The packets sent by devices are NOTIFY packets (not to be confused with TCP
- * NOTIFY packets that are used later) and those sent by control points are
- * M-SEARCH packets. These packets contain a simple HTTP style header. The
- * packets are sent redundantly to get around packet loss. Devices respond to
- * M-SEARCH packets with HTTP-like UDP packets containing HTTP/1.1 200 OK
- * messages, which give similar information as the UDP NOTIFY packets.
- *
- * The above UDP packets advertise the (arbitrary) TCP ports that the
- * respective parties will listen to. The control point can then do a HTTP
- * SUBSCRIBE (something like an HTTP PUT) after which the device can do a
- * separate HTTP NOTIFY (also like an HTTP PUT) to do event messaging.
- *
- * The control point will also do HTTP GET of the "device file" listed in the
- * original UDP information from the device (see UPNP_WPS_DEVICE_XML_FILE
- * data), and based on this will do additional GETs... HTTP POSTs are done to
- * cause an action.
- *
- * Beyond some basic information in HTTP headers, additional information is in
- * the HTTP bodies, in a format set by the SOAP and XML standards, a markup
- * language related to HTML used for web pages. This language is intended to
- * provide the ultimate in self-documentation by providing a universal
- * namespace based on pseudo-URLs called URIs. Note that although a URI looks
- * like a URL (a web address), they are never accessed as such but are used
- * only as identifiers.
- *
- * The POST of a GetDeviceInfo gets information similar to what might be
- * obtained from a probe request or response on Wi-Fi. WPS messages M1-M8
- * are passed via a POST of a PutMessage; the M1-M8 WPS messages are converted
- * to a bin64 ascii representation for encapsulation. When proxying messages,
- * WLANEvent and PutWLANResponse are used.
- *
- * This of course glosses over a lot of details.
- */
-
-#include "includes.h"
-
-#include <time.h>
-#include <net/if.h>
-#include <netdb.h>
-#include <sys/ioctl.h>
-
-#include "common.h"
-#include "uuid.h"
-#include "base64.h"
-#include "wps.h"
-#include "wps_i.h"
-#include "wps_upnp.h"
-#include "wps_upnp_i.h"
-
-
-/*
- * UPnP allows a client ("control point") to send a server like us ("device")
- * a domain name for registration, and we are supposed to resolve it. This is
- * bad because, using the standard Linux library, we will stall the entire
- * hostapd waiting for resolution.
- *
- * The "correct" solution would be to use an event driven library for domain
- * name resolution such as "ares". However, this would increase code size
- * further. Since it is unlikely that we'll actually see such domain names, we
- * can just refuse to accept them.
- */
-#define NO_DOMAIN_NAME_RESOLUTION 1 /* 1 to allow only dotted ip addresses */
-
-
-/*
- * UPnP does not scale well. If we were in a room with thousands of control
- * points then potentially we could be expected to handle subscriptions for
- * each of them, which would exhaust our memory. So we must set a limit. In
- * practice we are unlikely to see more than one or two.
- */
-#define MAX_SUBSCRIPTIONS 4 /* how many subscribing clients we handle */
-#define MAX_ADDR_PER_SUBSCRIPTION 8
-
-/* Maximum number of Probe Request events per second */
-#define MAX_EVENTS_PER_SEC 5
-
-
-static struct upnp_wps_device_sm *shared_upnp_device = NULL;
-
-
-/* Write the current date/time per RFC */
-void format_date(struct wpabuf *buf)
-{
- const char *weekday_str = "Sun\0Mon\0Tue\0Wed\0Thu\0Fri\0Sat";
- const char *month_str = "Jan\0Feb\0Mar\0Apr\0May\0Jun\0"
- "Jul\0Aug\0Sep\0Oct\0Nov\0Dec";
- struct tm *date;
- time_t t;
-
- t = time(NULL);
- date = gmtime(&t);
- if (date == NULL)
- return;
- wpabuf_printf(buf, "%s, %02d %s %d %02d:%02d:%02d GMT",
- &weekday_str[date->tm_wday * 4], date->tm_mday,
- &month_str[date->tm_mon * 4], date->tm_year + 1900,
- date->tm_hour, date->tm_min, date->tm_sec);
-}
-
-
-/***************************************************************************
- * UUIDs (unique identifiers)
- *
- * These are supposed to be unique in all the world.
- * Sometimes permanent ones are used, sometimes temporary ones
- * based on random numbers... there are different rules for valid content
- * of different types.
- * Each uuid is 16 bytes long.
- **************************************************************************/
-
-/* uuid_make -- construct a random UUID
- * The UPnP documents don't seem to offer any guidelines as to which method to
- * use for constructing UUIDs for subscriptions. Presumably any method from
- * rfc4122 is good enough; I've chosen random number method.
- */
-static int uuid_make(u8 uuid[UUID_LEN])
-{
- if (os_get_random(uuid, UUID_LEN) < 0)
- return -1;
-
- /* Replace certain bits as specified in rfc4122 or X.667 */
- uuid[6] &= 0x0f; uuid[6] |= (4 << 4); /* version 4 == random gen */
- uuid[8] &= 0x3f; uuid[8] |= 0x80;
-
- return 0;
-}
-
-
-/*
- * Subscriber address handling.
- * Since a subscriber may have an arbitrary number of addresses, we have to
- * add a bunch of code to handle them.
- *
- * Addresses are passed in text, and MAY be domain names instead of the (usual
- * and expected) dotted IP addresses. Resolving domain names consumes a lot of
- * resources. Worse, we are currently using the standard Linux getaddrinfo()
- * which will block the entire program until complete or timeout! The proper
- * solution would be to use the "ares" library or similar with more state
- * machine steps etc. or just disable domain name resolution by setting
- * NO_DOMAIN_NAME_RESOLUTION to 1 at top of this file.
- */
-
-/* subscr_addr_delete -- delete single unlinked subscriber address
- * (be sure to unlink first if need be)
- */
-void subscr_addr_delete(struct subscr_addr *a)
-{
- /*
- * Note: do NOT free domain_and_port or path because they point to
- * memory within the allocation of "a".
- */
- os_free(a);
-}
-
-
-/* subscr_addr_free_all -- unlink and delete list of subscriber addresses. */
-static void subscr_addr_free_all(struct subscription *s)
-{
- struct subscr_addr *a, *tmp;
- dl_list_for_each_safe(a, tmp, &s->addr_list, struct subscr_addr, list)
- {
- dl_list_del(&a->list);
- subscr_addr_delete(a);
- }
-}
-
-
-/* subscr_addr_add_url -- add address(es) for one url to subscription */
-static void subscr_addr_add_url(struct subscription *s, const char *url,
- size_t url_len)
-{
- int alloc_len;
- char *scratch_mem = NULL;
- char *mem;
- char *host;
- char *delim;
- char *path;
- int port = 80; /* port to send to (default is port 80) */
- struct addrinfo hints;
- struct addrinfo *result = NULL;
- struct addrinfo *rp;
- int rerr;
- size_t host_len, path_len;
-
- /* url MUST begin with http: */
- if (url_len < 7 || os_strncasecmp(url, "http://", 7))
- goto fail;
- url += 7;
- url_len -= 7;
-
- /* Make a copy of the string to allow modification during parsing */
- scratch_mem = dup_binstr(url, url_len);
- if (scratch_mem == NULL)
- goto fail;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Adding URL '%s'", scratch_mem);
- host = scratch_mem;
- path = os_strchr(host, '/');
- if (path)
- *path++ = '\0'; /* null terminate host */
-
- /* Process and remove optional port component */
- delim = os_strchr(host, ':');
- if (delim) {
- *delim = '\0'; /* null terminate host name for now */
- if (isdigit(delim[1]))
- port = atol(delim + 1);
- }
-
- /*
- * getaddrinfo does the right thing with dotted decimal notations, or
- * will resolve domain names. Resolving domain names will unfortunately
- * hang the entire program until it is resolved or it times out
- * internal to getaddrinfo; fortunately we think that the use of actual
- * domain names (vs. dotted decimal notations) should be uncommon.
- */
- os_memset(&hints, 0, sizeof(struct addrinfo));
- hints.ai_family = AF_INET; /* IPv4 */
- hints.ai_socktype = SOCK_STREAM;
-#if NO_DOMAIN_NAME_RESOLUTION
- /* Suppress domain name resolutions that would halt
- * the program for periods of time
- */
- hints.ai_flags = AI_NUMERICHOST;
-#else
- /* Allow domain name resolution. */
- hints.ai_flags = 0;
-#endif
- hints.ai_protocol = 0; /* Any protocol? */
- rerr = getaddrinfo(host, NULL /* fill in port ourselves */,
- &hints, &result);
- if (rerr) {
- wpa_printf(MSG_INFO, "WPS UPnP: Resolve error %d (%s) on: %s",
- rerr, gai_strerror(rerr), host);
- goto fail;
- }
-
- if (delim)
- *delim = ':'; /* Restore port */
-
- host_len = os_strlen(host);
- path_len = path ? os_strlen(path) : 0;
- alloc_len = host_len + 1 + 1 + path_len + 1;
-
- for (rp = result; rp; rp = rp->ai_next) {
- struct subscr_addr *a;
-
- /* Limit no. of address to avoid denial of service attack */
- if (dl_list_len(&s->addr_list) >= MAX_ADDR_PER_SUBSCRIPTION) {
- wpa_printf(MSG_INFO, "WPS UPnP: subscr_addr_add_url: "
- "Ignoring excessive addresses");
- break;
- }
-
- a = os_zalloc(sizeof(*a) + alloc_len);
- if (a == NULL)
- break;
- mem = (char *) (a + 1);
- a->domain_and_port = mem;
- os_memcpy(mem, host, host_len);
- mem += host_len + 1;
- a->path = mem;
- if (path == NULL || path[0] != '/')
- *mem++ = '/';
- if (path)
- os_memcpy(mem, path, path_len);
- os_memcpy(&a->saddr, rp->ai_addr, sizeof(a->saddr));
- a->saddr.sin_port = htons(port);
-
- dl_list_add(&s->addr_list, &a->list);
- }
-
-fail:
- if (result)
- freeaddrinfo(result);
- os_free(scratch_mem);
-}
-
-
-/* subscr_addr_list_create -- create list from urls in string.
- * Each url is enclosed by angle brackets.
- */
-static void subscr_addr_list_create(struct subscription *s,
- const char *url_list)
-{
- const char *end;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Parsing URL list '%s'", url_list);
- for (;;) {
- while (*url_list == ' ' || *url_list == '\t')
- url_list++;
- if (*url_list != '<')
- break;
- url_list++;
- end = os_strchr(url_list, '>');
- if (end == NULL)
- break;
- subscr_addr_add_url(s, url_list, end - url_list);
- url_list = end + 1;
- }
-}
-
-
-static void wpabuf_put_property(struct wpabuf *buf, const char *name,
- const char *value)
-{
- wpabuf_put_str(buf, "<e:property>");
- wpabuf_printf(buf, "<%s>", name);
- if (value)
- wpabuf_put_str(buf, value);
- wpabuf_printf(buf, "</%s>", name);
- wpabuf_put_str(buf, "</e:property>\n");
-}
-
-
-/**
- * upnp_wps_device_send_event - Queue event messages for subscribers
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- *
- * This function queues the last WLANEvent to be sent for all currently
- * subscribed UPnP control points. sm->wlanevent must have been set with the
- * encoded data before calling this function.
- */
-static void upnp_wps_device_send_event(struct upnp_wps_device_sm *sm)
-{
- /* Enqueue event message for all subscribers */
- struct wpabuf *buf; /* holds event message */
- int buf_size = 0;
- struct subscription *s, *tmp;
- /* Actually, utf-8 is the default, but it doesn't hurt to specify it */
- const char *format_head =
- "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
- "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
- const char *format_tail = "</e:propertyset>\n";
- struct os_reltime now;
-
- if (dl_list_empty(&sm->subscriptions)) {
- /* optimize */
- return;
- }
-
- if (os_get_reltime(&now) == 0) {
- if (now.sec != sm->last_event_sec) {
- sm->last_event_sec = now.sec;
- sm->num_events_in_sec = 1;
- } else {
- sm->num_events_in_sec++;
- /*
- * In theory, this should apply to all WLANEvent
- * notifications, but EAP messages are of much higher
- * priority and Probe Request notifications should not
- * be allowed to drop EAP messages, so only throttle
- * Probe Request notifications.
- */
- if (sm->num_events_in_sec > MAX_EVENTS_PER_SEC &&
- sm->wlanevent_type ==
- UPNP_WPS_WLANEVENT_TYPE_PROBE) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Throttle "
- "event notifications (%u seen "
- "during one second)",
- sm->num_events_in_sec);
- return;
- }
- }
- }
-
- /* Determine buffer size needed first */
- buf_size += os_strlen(format_head);
- buf_size += 50 + 2 * os_strlen("WLANEvent");
- if (sm->wlanevent)
- buf_size += os_strlen(sm->wlanevent);
- buf_size += os_strlen(format_tail);
-
- buf = wpabuf_alloc(buf_size);
- if (buf == NULL)
- return;
- wpabuf_put_str(buf, format_head);
- wpabuf_put_property(buf, "WLANEvent", sm->wlanevent);
- wpabuf_put_str(buf, format_tail);
-
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: WLANEvent message:\n%s",
- (char *) wpabuf_head(buf));
-
- dl_list_for_each_safe(s, tmp, &sm->subscriptions, struct subscription,
- list) {
- event_add(s, buf,
- sm->wlanevent_type == UPNP_WPS_WLANEVENT_TYPE_PROBE);
- }
-
- wpabuf_free(buf);
-}
-
-
-/*
- * Event subscription (subscriber machines register with us to receive event
- * messages).
- * This is the result of an incoming HTTP over TCP SUBSCRIBE request.
- */
-
-/* subscription_destroy -- destroy an unlinked subscription
- * Be sure to unlink first if necessary.
- */
-void subscription_destroy(struct subscription *s)
-{
- struct upnp_wps_device_interface *iface;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Destroy subscription %p", s);
- subscr_addr_free_all(s);
- event_delete_all(s);
- dl_list_for_each(iface, &s->sm->interfaces,
- struct upnp_wps_device_interface, list)
- upnp_er_remove_notification(iface->wps->registrar, s);
- os_free(s);
-}
-
-
-/* subscription_list_age -- remove expired subscriptions */
-static void subscription_list_age(struct upnp_wps_device_sm *sm, time_t now)
-{
- struct subscription *s, *tmp;
- dl_list_for_each_safe(s, tmp, &sm->subscriptions,
- struct subscription, list) {
- if (s->timeout_time > now)
- break;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Removing aged subscription");
- dl_list_del(&s->list);
- subscription_destroy(s);
- }
-}
-
-
-/* subscription_find -- return existing subscription matching uuid, if any
- * returns NULL if not found
- */
-struct subscription * subscription_find(struct upnp_wps_device_sm *sm,
- const u8 uuid[UUID_LEN])
-{
- struct subscription *s;
- dl_list_for_each(s, &sm->subscriptions, struct subscription, list) {
- if (os_memcmp(s->uuid, uuid, UUID_LEN) == 0)
- return s; /* Found match */
- }
- return NULL;
-}
-
-
-static struct wpabuf * build_fake_wsc_ack(void)
-{
- struct wpabuf *msg = wpabuf_alloc(100);
- if (msg == NULL)
- return NULL;
- wpabuf_put_u8(msg, UPNP_WPS_WLANEVENT_TYPE_EAP);
- wpabuf_put_str(msg, "00:00:00:00:00:00");
- if (wps_build_version(msg) ||
- wps_build_msg_type(msg, WPS_WSC_ACK)) {
- wpabuf_free(msg);
- return NULL;
- }
- /* Enrollee Nonce */
- wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
- wpabuf_put_be16(msg, WPS_NONCE_LEN);
- wpabuf_put(msg, WPS_NONCE_LEN);
- /* Registrar Nonce */
- wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
- wpabuf_put_be16(msg, WPS_NONCE_LEN);
- wpabuf_put(msg, WPS_NONCE_LEN);
- if (wps_build_wfa_ext(msg, 0, NULL, 0)) {
- wpabuf_free(msg);
- return NULL;
- }
- return msg;
-}
-
-
-/* subscription_first_event -- send format/queue event that is automatically
- * sent on a new subscription.
- */
-static int subscription_first_event(struct subscription *s)
-{
- /*
- * Actually, utf-8 is the default, but it doesn't hurt to specify it.
- *
- * APStatus is apparently a bit set,
- * 0x1 = configuration change (but is always set?)
- * 0x10 = ap is locked
- *
- * Per UPnP spec, we send out the last value of each variable, even
- * for WLANEvent, whatever it was.
- */
- char *wlan_event;
- struct wpabuf *buf;
- int ap_status = 1; /* TODO: add 0x10 if access point is locked */
- const char *head =
- "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
- "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
- const char *tail = "</e:propertyset>\n";
- char txt[10];
- int ret;
-
- if (s->sm->wlanevent == NULL) {
- /*
- * There has been no events before the subscription. However,
- * UPnP device architecture specification requires all the
- * evented variables to be included, so generate a dummy event
- * for this particular case using a WSC_ACK and all-zeros
- * nonces. The ER (UPnP control point) will ignore this, but at
- * least it will learn that WLANEvent variable will be used in
- * event notifications in the future.
- */
- struct wpabuf *msg;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Use a fake WSC_ACK as the "
- "initial WLANEvent");
- msg = build_fake_wsc_ack();
- if (msg) {
- s->sm->wlanevent = (char *)
- base64_encode(wpabuf_head(msg),
- wpabuf_len(msg), NULL);
- wpabuf_free(msg);
- }
- }
-
- wlan_event = s->sm->wlanevent;
- if (wlan_event == NULL || *wlan_event == '\0') {
- wpa_printf(MSG_DEBUG, "WPS UPnP: WLANEvent not known for "
- "initial event message");
- wlan_event = "";
- }
- buf = wpabuf_alloc(500 + os_strlen(wlan_event));
- if (buf == NULL)
- return -1;
-
- wpabuf_put_str(buf, head);
- wpabuf_put_property(buf, "STAStatus", "1");
- os_snprintf(txt, sizeof(txt), "%d", ap_status);
- wpabuf_put_property(buf, "APStatus", txt);
- if (*wlan_event)
- wpabuf_put_property(buf, "WLANEvent", wlan_event);
- wpabuf_put_str(buf, tail);
-
- ret = event_add(s, buf, 0);
- if (ret) {
- wpabuf_free(buf);
- return ret;
- }
- wpabuf_free(buf);
-
- return 0;
-}
-
-
-/**
- * subscription_start - Remember a UPnP control point to send events to.
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @callback_urls: Callback URLs
- * Returns: %NULL on error, or pointer to new subscription structure.
- */
-struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
- const char *callback_urls)
-{
- struct subscription *s;
- time_t now = time(NULL);
- time_t expire = now + UPNP_SUBSCRIBE_SEC;
- char str[80];
-
- /* Get rid of expired subscriptions so we have room */
- subscription_list_age(sm, now);
-
- /* If too many subscriptions, remove oldest */
- if (dl_list_len(&sm->subscriptions) >= MAX_SUBSCRIPTIONS) {
- s = dl_list_first(&sm->subscriptions, struct subscription,
- list);
- if (s) {
- wpa_printf(MSG_INFO,
- "WPS UPnP: Too many subscriptions, trashing oldest");
- dl_list_del(&s->list);
- subscription_destroy(s);
- }
- }
-
- s = os_zalloc(sizeof(*s));
- if (s == NULL)
- return NULL;
- dl_list_init(&s->addr_list);
- dl_list_init(&s->event_queue);
-
- s->sm = sm;
- s->timeout_time = expire;
- if (uuid_make(s->uuid) < 0) {
- subscription_destroy(s);
- return NULL;
- }
- subscr_addr_list_create(s, callback_urls);
- if (dl_list_empty(&s->addr_list)) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: No valid callback URLs in "
- "'%s' - drop subscription", callback_urls);
- subscription_destroy(s);
- return NULL;
- }
-
- /* Add to end of list, since it has the highest expiration time */
- dl_list_add_tail(&sm->subscriptions, &s->list);
- /* Queue up immediate event message (our last event)
- * as required by UPnP spec.
- */
- if (subscription_first_event(s)) {
- wpa_printf(MSG_INFO, "WPS UPnP: Dropping subscriber due to "
- "event backlog");
- dl_list_del(&s->list);
- subscription_destroy(s);
- return NULL;
- }
- uuid_bin2str(s->uuid, str, sizeof(str));
- wpa_printf(MSG_DEBUG,
- "WPS UPnP: Subscription %p (SID %s) started with %s",
- s, str, callback_urls);
- /* Schedule sending this */
- event_send_all_later(sm);
- return s;
-}
-
-
-/* subscription_renew -- find subscription and reset timeout */
-struct subscription * subscription_renew(struct upnp_wps_device_sm *sm,
- const u8 uuid[UUID_LEN])
-{
- time_t now = time(NULL);
- time_t expire = now + UPNP_SUBSCRIBE_SEC;
- struct subscription *s = subscription_find(sm, uuid);
- if (s == NULL)
- return NULL;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription renewed");
- dl_list_del(&s->list);
- s->timeout_time = expire;
- /* add back to end of list, since it now has highest expiry */
- dl_list_add_tail(&sm->subscriptions, &s->list);
- return s;
-}
-
-
-/**
- * upnp_wps_device_send_wlan_event - Event notification
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @from_mac_addr: Source (Enrollee) MAC address for the event
- * @ev_type: Event type
- * @msg: Event data
- * Returns: 0 on success, -1 on failure
- *
- * Tell external Registrars (UPnP control points) that something happened. In
- * particular, events include WPS messages from clients that are proxied to
- * external Registrars.
- */
-int upnp_wps_device_send_wlan_event(struct upnp_wps_device_sm *sm,
- const u8 from_mac_addr[ETH_ALEN],
- enum upnp_wps_wlanevent_type ev_type,
- const struct wpabuf *msg)
-{
- int ret = -1;
- char type[2];
- const u8 *mac = from_mac_addr;
- char mac_text[18];
- u8 *raw = NULL;
- size_t raw_len;
- char *val;
- size_t val_len;
- int pos = 0;
-
- if (!sm)
- goto fail;
-
- os_snprintf(type, sizeof(type), "%1u", ev_type);
-
- raw_len = 1 + 17 + (msg ? wpabuf_len(msg) : 0);
- raw = os_zalloc(raw_len);
- if (!raw)
- goto fail;
-
- *(raw + pos) = (u8) ev_type;
- pos += 1;
- os_snprintf(mac_text, sizeof(mac_text), MACSTR, MAC2STR(mac));
- wpa_printf(MSG_DEBUG, "WPS UPnP: Proxying WLANEvent from %s",
- mac_text);
- os_memcpy(raw + pos, mac_text, 17);
- pos += 17;
- if (msg) {
- os_memcpy(raw + pos, wpabuf_head(msg), wpabuf_len(msg));
- pos += wpabuf_len(msg);
- }
- raw_len = pos;
-
- val = (char *) base64_encode(raw, raw_len, &val_len);
- if (val == NULL)
- goto fail;
-
- os_free(sm->wlanevent);
- sm->wlanevent = val;
- sm->wlanevent_type = ev_type;
- upnp_wps_device_send_event(sm);
-
- ret = 0;
-
-fail:
- os_free(raw);
-
- return ret;
-}
-
-
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-#include <sys/sysctl.h>
-#include <net/route.h>
-#include <net/if_dl.h>
-
-static int eth_get(const char *device, u8 ea[ETH_ALEN])
-{
- struct if_msghdr *ifm;
- struct sockaddr_dl *sdl;
- u_char *p, *buf;
- size_t len;
- int mib[] = { CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0 };
-
- if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
- return -1;
- if ((buf = os_malloc(len)) == NULL)
- return -1;
- if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
- os_free(buf);
- return -1;
- }
- for (p = buf; p < buf + len; p += ifm->ifm_msglen) {
- ifm = (struct if_msghdr *)p;
- sdl = (struct sockaddr_dl *)(ifm + 1);
- if (ifm->ifm_type != RTM_IFINFO ||
- (ifm->ifm_addrs & RTA_IFP) == 0)
- continue;
- if (sdl->sdl_family != AF_LINK || sdl->sdl_nlen == 0 ||
- os_memcmp(sdl->sdl_data, device, sdl->sdl_nlen) != 0)
- continue;
- os_memcpy(ea, LLADDR(sdl), sdl->sdl_alen);
- break;
- }
- os_free(buf);
-
- if (p >= buf + len) {
- errno = ESRCH;
- return -1;
- }
- return 0;
-}
-#endif /* __FreeBSD__ */
-
-
-/**
- * get_netif_info - Get hw and IP addresses for network device
- * @net_if: Selected network interface name
- * @ip_addr: Buffer for returning IP address in network byte order
- * @ip_addr_text: Buffer for returning a pointer to allocated IP address text
- * @mac: Buffer for returning MAC address
- * Returns: 0 on success, -1 on failure
- */
-int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text,
- u8 mac[ETH_ALEN])
-{
- struct ifreq req;
- int sock = -1;
- struct sockaddr_in *addr;
- struct in_addr in_addr;
-
- *ip_addr_text = os_zalloc(16);
- if (*ip_addr_text == NULL)
- goto fail;
-
- sock = socket(AF_INET, SOCK_DGRAM, 0);
- if (sock < 0)
- goto fail;
-
- os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
- if (ioctl(sock, SIOCGIFADDR, &req) < 0) {
- wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFADDR failed: %d (%s)",
- errno, strerror(errno));
- goto fail;
- }
- addr = (void *) &req.ifr_addr;
- *ip_addr = addr->sin_addr.s_addr;
- in_addr.s_addr = *ip_addr;
- os_snprintf(*ip_addr_text, 16, "%s", inet_ntoa(in_addr));
-
-#ifdef __linux__
- os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
- if (ioctl(sock, SIOCGIFHWADDR, &req) < 0) {
- wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFHWADDR failed: "
- "%d (%s)", errno, strerror(errno));
- goto fail;
- }
- os_memcpy(mac, req.ifr_addr.sa_data, 6);
-#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
- if (eth_get(net_if, mac) < 0) {
- wpa_printf(MSG_ERROR, "WPS UPnP: Failed to get MAC address");
- goto fail;
- }
-#else
-#error MAC address fetch not implemented
-#endif
-
- close(sock);
- return 0;
-
-fail:
- if (sock >= 0)
- close(sock);
- os_free(*ip_addr_text);
- *ip_addr_text = NULL;
- return -1;
-}
-
-
-static void upnp_wps_free_msearchreply(struct dl_list *head)
-{
- struct advertisement_state_machine *a, *tmp;
- dl_list_for_each_safe(a, tmp, head, struct advertisement_state_machine,
- list)
- msearchreply_state_machine_stop(a);
-}
-
-
-static void upnp_wps_free_subscriptions(struct dl_list *head,
- struct wps_registrar *reg)
-{
- struct subscription *s, *tmp;
- dl_list_for_each_safe(s, tmp, head, struct subscription, list) {
- if (reg && s->reg != reg)
- continue;
- dl_list_del(&s->list);
- subscription_destroy(s);
- }
-}
-
-
-/**
- * upnp_wps_device_stop - Stop WPS UPnP operations on an interface
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- */
-static void upnp_wps_device_stop(struct upnp_wps_device_sm *sm)
-{
- if (!sm || !sm->started)
- return;
-
- wpa_printf(MSG_DEBUG, "WPS UPnP: Stop device");
- web_listener_stop(sm);
- ssdp_listener_stop(sm);
- upnp_wps_free_msearchreply(&sm->msearch_replies);
- upnp_wps_free_subscriptions(&sm->subscriptions, NULL);
-
- advertisement_state_machine_stop(sm, 1);
-
- event_send_stop_all(sm);
- os_free(sm->wlanevent);
- sm->wlanevent = NULL;
- os_free(sm->ip_addr_text);
- sm->ip_addr_text = NULL;
- if (sm->multicast_sd >= 0)
- close(sm->multicast_sd);
- sm->multicast_sd = -1;
-
- sm->started = 0;
-}
-
-
-/**
- * upnp_wps_device_start - Start WPS UPnP operations on an interface
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @net_if: Selected network interface name
- * Returns: 0 on success, -1 on failure
- */
-static int upnp_wps_device_start(struct upnp_wps_device_sm *sm, char *net_if)
-{
- if (!sm || !net_if)
- return -1;
-
- if (sm->started)
- upnp_wps_device_stop(sm);
-
- sm->multicast_sd = -1;
- sm->ssdp_sd = -1;
- sm->started = 1;
- sm->advertise_count = 0;
-
- /* Fix up linux multicast handling */
- if (add_ssdp_network(net_if))
- goto fail;
-
- /* Determine which IP and mac address we're using */
- if (get_netif_info(net_if, &sm->ip_addr, &sm->ip_addr_text,
- sm->mac_addr)) {
- wpa_printf(MSG_INFO, "WPS UPnP: Could not get IP/MAC address "
- "for %s. Does it have IP address?", net_if);
- goto fail;
- }
-
- /* Listen for incoming TCP connections so that others
- * can fetch our "xml files" from us.
- */
- if (web_listener_start(sm))
- goto fail;
-
- /* Set up for receiving discovery (UDP) packets */
- if (ssdp_listener_start(sm))
- goto fail;
-
- /* Set up for sending multicast */
- if (ssdp_open_multicast(sm) < 0)
- goto fail;
-
- /*
- * Broadcast NOTIFY messages to let the world know we exist.
- * This is done via a state machine since the messages should not be
- * all sent out at once.
- */
- if (advertisement_state_machine_start(sm))
- goto fail;
-
- return 0;
-
-fail:
- upnp_wps_device_stop(sm);
- return -1;
-}
-
-
-static struct upnp_wps_device_interface *
-upnp_wps_get_iface(struct upnp_wps_device_sm *sm, void *priv)
-{
- struct upnp_wps_device_interface *iface;
- dl_list_for_each(iface, &sm->interfaces,
- struct upnp_wps_device_interface, list) {
- if (iface->priv == priv)
- return iface;
- }
- return NULL;
-}
-
-
-/**
- * upnp_wps_device_deinit - Deinitialize WPS UPnP
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @priv: External context data that was used in upnp_wps_device_init() call
- */
-void upnp_wps_device_deinit(struct upnp_wps_device_sm *sm, void *priv)
-{
- struct upnp_wps_device_interface *iface;
- struct upnp_wps_peer *peer;
-
- if (!sm)
- return;
-
- iface = upnp_wps_get_iface(sm, priv);
- if (iface == NULL) {
- wpa_printf(MSG_ERROR, "WPS UPnP: Could not find the interface "
- "instance to deinit");
- return;
- }
- wpa_printf(MSG_DEBUG, "WPS UPnP: Deinit interface instance %p", iface);
- if (dl_list_len(&sm->interfaces) == 1) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Deinitializing last instance "
- "- free global device instance");
- upnp_wps_device_stop(sm);
- } else
- upnp_wps_free_subscriptions(&sm->subscriptions,
- iface->wps->registrar);
- dl_list_del(&iface->list);
-
- while ((peer = dl_list_first(&iface->peers, struct upnp_wps_peer,
- list))) {
- if (peer->wps)
- wps_deinit(peer->wps);
- dl_list_del(&peer->list);
- os_free(peer);
- }
- os_free(iface->ctx->ap_pin);
- os_free(iface->ctx);
- os_free(iface);
-
- if (dl_list_empty(&sm->interfaces)) {
- os_free(sm->root_dir);
- os_free(sm->desc_url);
- os_free(sm);
- shared_upnp_device = NULL;
- }
-}
-
-
-/**
- * upnp_wps_device_init - Initialize WPS UPnP
- * @ctx: callback table; we must eventually free it
- * @wps: Pointer to longterm WPS context
- * @priv: External context data that will be used in callbacks
- * @net_if: Selected network interface name
- * Returns: WPS UPnP state or %NULL on failure
- */
-struct upnp_wps_device_sm *
-upnp_wps_device_init(struct upnp_wps_device_ctx *ctx, struct wps_context *wps,
- void *priv, char *net_if)
-{
- struct upnp_wps_device_sm *sm;
- struct upnp_wps_device_interface *iface;
- int start = 0;
-
- iface = os_zalloc(sizeof(*iface));
- if (iface == NULL) {
- os_free(ctx->ap_pin);
- os_free(ctx);
- return NULL;
- }
- wpa_printf(MSG_DEBUG, "WPS UPnP: Init interface instance %p", iface);
-
- dl_list_init(&iface->peers);
- iface->ctx = ctx;
- iface->wps = wps;
- iface->priv = priv;
-
- if (shared_upnp_device) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Share existing device "
- "context");
- sm = shared_upnp_device;
- } else {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Initialize device context");
- sm = os_zalloc(sizeof(*sm));
- if (!sm) {
- wpa_printf(MSG_ERROR, "WPS UPnP: upnp_wps_device_init "
- "failed");
- os_free(iface);
- os_free(ctx->ap_pin);
- os_free(ctx);
- return NULL;
- }
- shared_upnp_device = sm;
-
- dl_list_init(&sm->msearch_replies);
- dl_list_init(&sm->subscriptions);
- dl_list_init(&sm->interfaces);
- start = 1;
- }
-
- dl_list_add(&sm->interfaces, &iface->list);
-
- if (start && upnp_wps_device_start(sm, net_if)) {
- upnp_wps_device_deinit(sm, priv);
- return NULL;
- }
-
-
- return sm;
-}
-
-
-/**
- * upnp_wps_subscribers - Check whether there are any event subscribers
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * Returns: 0 if no subscribers, 1 if subscribers
- */
-int upnp_wps_subscribers(struct upnp_wps_device_sm *sm)
-{
- return !dl_list_empty(&sm->subscriptions);
-}
-
-
-int upnp_wps_set_ap_pin(struct upnp_wps_device_sm *sm, const char *ap_pin)
-{
- struct upnp_wps_device_interface *iface;
- if (sm == NULL)
- return 0;
-
- dl_list_for_each(iface, &sm->interfaces,
- struct upnp_wps_device_interface, list) {
- os_free(iface->ctx->ap_pin);
- if (ap_pin) {
- iface->ctx->ap_pin = os_strdup(ap_pin);
- if (iface->ctx->ap_pin == NULL)
- return -1;
- } else
- iface->ctx->ap_pin = NULL;
- }
-
- return 0;
-}
projects / mech_eap.git / blobdiff