src/wps/wps_upnp_i.h

   1 /*
   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>
   7  *
   8  * See wps_upnp.c for more details on licensing and code history.
   9  */
  10
  11 #ifndef WPS_UPNP_I_H
  12 #define WPS_UPNP_I_H
  13
  14 #include "utils/list.h"
  15 #include "http.h"
  16
  17 #define UPNP_MULTICAST_ADDRESS  "239.255.255.250" /* for UPnP multicasting */
  18 #define UPNP_MULTICAST_PORT 1900 /* UDP port to monitor for UPnP */
  19
  20 /* min subscribe time per UPnP standard */
  21 #define UPNP_SUBSCRIBE_SEC_MIN 1800
  22 /* subscribe time we use */
  23 #define UPNP_SUBSCRIBE_SEC (UPNP_SUBSCRIBE_SEC_MIN + 1)
  24
  25 /* "filenames" used in URLs that we service via our "web server": */
  26 #define UPNP_WPS_DEVICE_XML_FILE "wps_device.xml"
  27 #define UPNP_WPS_SCPD_XML_FILE   "wps_scpd.xml"
  28 #define UPNP_WPS_DEVICE_CONTROL_FILE "wps_control"
  29 #define UPNP_WPS_DEVICE_EVENT_FILE "wps_event"
  30
  31 #define MULTICAST_MAX_READ 1600 /* max bytes we'll read for UPD request */
  32
  33
  34 struct upnp_wps_device_sm;
  35 struct wps_registrar;
  36
  37
  38 enum advertisement_type_enum {
  39         ADVERTISE_UP = 0,
  40         ADVERTISE_DOWN = 1,
  41         MSEARCH_REPLY = 2
  42 };
  43
  44 /*
  45  * Advertisements are broadcast via UDP NOTIFYs, and are also the essence of
  46  * the reply to UDP M-SEARCH requests. This struct handles both cases.
  47  *
  48  * A state machine is needed because a number of variant forms must be sent in
  49  * separate packets and spread out in time to avoid congestion.
  50  */
  51 struct advertisement_state_machine {
  52         struct dl_list list;
  53         enum advertisement_type_enum type;
  54         int state;
  55         int nerrors;
  56         struct sockaddr_in client; /* for M-SEARCH replies */
  57 };
  58
  59
  60 /*
  61  * An address of a subscriber (who may have multiple addresses). We are
  62  * supposed to send (via TCP) updates to each subscriber, trying each address
  63  * for a subscriber until we find one that seems to work.
  64  */
  65 struct subscr_addr {
  66         struct dl_list list;
  67         char *domain_and_port; /* domain and port part of url */
  68         char *path; /* "filepath" part of url (from "mem") */
  69         struct sockaddr_in saddr; /* address for doing connect */
  70 };
  71
  72
  73 /*
  74  * Subscribers to our events are recorded in this struct. This includes a max
  75  * of one outgoing connection (sending an "event message") per subscriber. We
  76  * also have to age out subscribers unless they renew.
  77  */
  78 struct subscription {
  79         struct dl_list list;
  80         struct upnp_wps_device_sm *sm; /* parent */
  81         time_t timeout_time; /* when to age out the subscription */
  82         unsigned next_subscriber_sequence; /* number our messages */
  83         /*
  84          * This uuid identifies the subscription and is randomly generated by
  85          * us and given to the subscriber when the subscription is accepted;
  86          * and is then included with each event sent to the subscriber.
  87          */
  88         u8 uuid[UUID_LEN];
  89         /* Linked list of address alternatives (rotate through on failure) */
  90         struct dl_list addr_list;
  91         struct dl_list event_queue; /* Queued event messages. */
  92         struct wps_event_ *current_event; /* non-NULL if being sent (not in q)
  93                                            */
  94
  95         /* Information from SetSelectedRegistrar action */
  96         u8 selected_registrar;
  97         u16 dev_password_id;
  98         u16 config_methods;
  99         struct wps_registrar *reg;
 100 };
 101
 102
 103 /*
 104  * Our instance data corresponding to one WiFi network interface
 105  * (multiple might share the same wired network interface!).
 106  *
 107  * This is known as an opaque struct declaration to users of the WPS UPnP code.
 108  */
 109 struct upnp_wps_device_sm {
 110         struct upnp_wps_device_ctx *ctx; /* callback table */
 111         struct wps_context *wps;
 112         void *priv;
 113         char *root_dir;
 114         char *desc_url;
 115         int started; /* nonzero if we are active */
 116         char *mac_addr_text; /* mac addr of network i.f. we use */
 117         u8 mac_addr[ETH_ALEN]; /* mac addr of network i.f. we use */
 118         char *ip_addr_text; /* IP address of network i.f. we use */
 119         unsigned ip_addr; /* IP address of network i.f. we use (host order) */
 120         int multicast_sd; /* send multicast messages over this socket */
 121         int ssdp_sd; /* receive discovery UPD packets on socket */
 122         int ssdp_sd_registered; /* nonzero if we must unregister */
 123         unsigned advertise_count; /* how many advertisements done */
 124         struct advertisement_state_machine advertisement;
 125         struct dl_list msearch_replies;
 126         int web_port; /* our port that others get xml files from */
 127         struct http_server *web_srv;
 128         /* Note: subscriptions are kept in expiry order */
 129         struct dl_list subscriptions;
 130         int event_send_all_queued; /* if we are scheduled to send events soon
 131                                     */
 132
 133         char *wlanevent; /* the last WLANEvent data */
 134
 135         /* FIX: maintain separate structures for each UPnP peer */
 136         struct upnp_wps_peer peer;
 137 };
 138
 139 /* wps_upnp.c */
 140 void format_date(struct wpabuf *buf);
 141 struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
 142                                          const char *callback_urls);
 143 struct subscription * subscription_renew(struct upnp_wps_device_sm *sm,
 144                                          const u8 uuid[UUID_LEN]);
 145 void subscription_destroy(struct subscription *s);
 146 struct subscription * subscription_find(struct upnp_wps_device_sm *sm,
 147                                         const u8 uuid[UUID_LEN]);
 148 int send_wpabuf(int fd, struct wpabuf *buf);
 149 int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text,
 150                    u8 mac[ETH_ALEN], char **mac_addr_text);
 151
 152 /* wps_upnp_ssdp.c */
 153 void msearchreply_state_machine_stop(struct advertisement_state_machine *a);
 154 int advertisement_state_machine_start(struct upnp_wps_device_sm *sm);
 155 void advertisement_state_machine_stop(struct upnp_wps_device_sm *sm,
 156                                       int send_byebye);
 157 void ssdp_listener_stop(struct upnp_wps_device_sm *sm);
 158 int ssdp_listener_start(struct upnp_wps_device_sm *sm);
 159 int ssdp_listener_open(void);
 160 int add_ssdp_network(const char *net_if);
 161 int ssdp_open_multicast_sock(u32 ip_addr);
 162 int ssdp_open_multicast(struct upnp_wps_device_sm *sm);
 163
 164 /* wps_upnp_web.c */
 165 int web_listener_start(struct upnp_wps_device_sm *sm);
 166 void web_listener_stop(struct upnp_wps_device_sm *sm);
 167
 168 /* wps_upnp_event.c */
 169 int event_add(struct subscription *s, const struct wpabuf *data);
 170 void event_delete_all(struct subscription *s);
 171 void event_send_all_later(struct upnp_wps_device_sm *sm);
 172 void event_send_stop_all(struct upnp_wps_device_sm *sm);
 173
 174 /* wps_upnp_ap.c */
 175 int upnp_er_set_selected_registrar(struct wps_registrar *reg,
 176                                    struct subscription *s,
 177                                    const struct wpabuf *msg);
 178 void upnp_er_remove_notification(struct subscription *s);
 179
 180 #endif /* WPS_UPNP_I_H */