2 * UPnP for WPS / internal definitions
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 wps_upnp.c for more details on licensing and code history.
16 #define UPNP_MULTICAST_ADDRESS "239.255.255.250" /* for UPnP multicasting */
17 #define UPNP_MULTICAST_PORT 1900 /* UDP port to monitor for UPnP */
19 /* min subscribe time per UPnP standard */
20 #define UPNP_SUBSCRIBE_SEC_MIN 1800
21 /* subscribe time we use */
22 #define UPNP_SUBSCRIBE_SEC (UPNP_SUBSCRIBE_SEC_MIN + 1)
24 /* "filenames" used in URLs that we service via our "web server": */
25 #define UPNP_WPS_DEVICE_XML_FILE "wps_device.xml"
26 #define UPNP_WPS_SCPD_XML_FILE "wps_scpd.xml"
27 #define UPNP_WPS_DEVICE_CONTROL_FILE "wps_control"
28 #define UPNP_WPS_DEVICE_EVENT_FILE "wps_event"
30 #define MULTICAST_MAX_READ 1600 /* max bytes we'll read for UPD request */
34 struct upnp_wps_device_sm;
37 enum advertisement_type_enum {
44 * Advertisements are broadcast via UDP NOTIFYs, and are also the essence of
45 * the reply to UDP M-SEARCH requests. This struct handles both cases.
47 * A state machine is needed because a number of variant forms must be sent in
48 * separate packets and spread out in time to avoid congestion.
50 struct advertisement_state_machine {
51 /* double-linked list */
52 struct advertisement_state_machine *next;
53 struct advertisement_state_machine *prev;
54 struct upnp_wps_device_sm *sm; /* parent */
55 enum advertisement_type_enum type;
58 struct sockaddr_in client; /* for M-SEARCH replies */
63 * An address of a subscriber (who may have multiple addresses). We are
64 * supposed to send (via TCP) updates to each subscriber, trying each address
65 * for a subscriber until we find one that seems to work.
68 /* double linked list */
69 struct subscr_addr *next;
70 struct subscr_addr *prev;
71 struct subscription *s; /* parent */
72 char *domain_and_port; /* domain and port part of url */
73 char *path; /* "filepath" part of url (from "mem") */
74 struct sockaddr_in saddr; /* address for doing connect */
79 * Subscribers to our events are recorded in this struct. This includes a max
80 * of one outgoing connection (sending an "event message") per subscriber. We
81 * also have to age out subscribers unless they renew.
84 /* double linked list */
85 struct subscription *next;
86 struct subscription *prev;
87 struct upnp_wps_device_sm *sm; /* parent */
88 time_t timeout_time; /* when to age out the subscription */
89 unsigned next_subscriber_sequence; /* number our messages */
91 * This uuid identifies the subscription and is randomly generated by
92 * us and given to the subscriber when the subscription is accepted;
93 * and is then included with each event sent to the subscriber.
96 /* Linked list of address alternatives (rotate through on failure) */
97 struct subscr_addr *addr_list;
98 int n_addr; /* Number of addresses in list */
99 struct wps_event_ *event_queue; /* Queued event messages. */
100 int n_queue; /* How many events are queued */
101 struct wps_event_ *current_event; /* non-NULL if being sent (not in q)
107 * Our instance data corresponding to one WiFi network interface
108 * (multiple might share the same wired network interface!).
110 * This is known as an opaque struct declaration to users of the WPS UPnP code.
112 struct upnp_wps_device_sm {
113 struct upnp_wps_device_ctx *ctx; /* callback table */
114 struct wps_context *wps;
118 int started; /* nonzero if we are active */
119 char *net_if; /* network interface we use */
120 char *mac_addr_text; /* mac addr of network i.f. we use */
121 u8 mac_addr[ETH_ALEN]; /* mac addr of network i.f. we use */
122 char *ip_addr_text; /* IP address of network i.f. we use */
123 unsigned ip_addr; /* IP address of network i.f. we use (host order) */
124 int multicast_sd; /* send multicast messages over this socket */
125 int ssdp_sd; /* receive discovery UPD packets on socket */
126 int ssdp_sd_registered; /* nonzero if we must unregister */
127 unsigned advertise_count; /* how many advertisements done */
128 struct advertisement_state_machine advertisement;
129 struct advertisement_state_machine *msearch_replies;
130 int n_msearch_replies; /* no. of pending M-SEARCH replies */
131 int web_port; /* our port that others get xml files from */
132 struct http_server *web_srv;
133 /* Note: subscriptions are kept in expiry order */
134 struct subscription *subscriptions; /* linked list */
135 int n_subscriptions; /* no of current subscriptions */
136 int event_send_all_queued; /* if we are scheduled to send events soon
139 char *wlanevent; /* the last WLANEvent data */
141 /* FIX: maintain separate structures for each UPnP peer */
142 struct upnp_wps_peer peer;
146 void format_date(struct wpabuf *buf);
147 struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
148 char *callback_urls);
149 struct subscription * subscription_renew(struct upnp_wps_device_sm *sm,
150 const u8 uuid[UUID_LEN]);
151 void subscription_unlink(struct subscription *s);
152 void subscription_destroy(struct subscription *s);
153 struct subscription * subscription_find(struct upnp_wps_device_sm *sm,
154 const u8 uuid[UUID_LEN]);
155 int send_wpabuf(int fd, struct wpabuf *buf);
156 int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text,
157 u8 mac[ETH_ALEN], char **mac_addr_text);
159 /* wps_upnp_ssdp.c */
160 void msearchreply_state_machine_stop(struct advertisement_state_machine *a);
161 int advertisement_state_machine_start(struct upnp_wps_device_sm *sm);
162 void advertisement_state_machine_stop(struct upnp_wps_device_sm *sm,
164 void ssdp_listener_stop(struct upnp_wps_device_sm *sm);
165 int ssdp_listener_start(struct upnp_wps_device_sm *sm);
166 int ssdp_listener_open(void);
167 int add_ssdp_network(const char *net_if);
168 int ssdp_open_multicast_sock(u32 ip_addr);
169 int ssdp_open_multicast(struct upnp_wps_device_sm *sm);
172 int web_listener_start(struct upnp_wps_device_sm *sm);
173 void web_listener_stop(struct upnp_wps_device_sm *sm);
175 /* wps_upnp_event.c */
176 int event_add(struct subscription *s, const struct wpabuf *data);
177 void event_delete_all(struct subscription *s);
178 void event_send_all_later(struct upnp_wps_device_sm *sm);
179 void event_send_stop_all(struct upnp_wps_device_sm *sm);
181 #endif /* WPS_UPNP_I_H */