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 u8 mac_addr[ETH_ALEN]; /* mac addr of network i.f. we use */ 117 char *ip_addr_text; /* IP address of network i.f. we use */ 118 unsigned ip_addr; /* IP address of network i.f. we use (host order) */ 119 int multicast_sd; /* send multicast messages over this socket */ 120 int ssdp_sd; /* receive discovery UPD packets on socket */ 121 int ssdp_sd_registered; /* nonzero if we must unregister */ 122 unsigned advertise_count; /* how many advertisements done */ 123 struct advertisement_state_machine advertisement; 124 struct dl_list msearch_replies; 125 int web_port; /* our port that others get xml files from */ 126 struct http_server *web_srv; 127 /* Note: subscriptions are kept in expiry order */ 128 struct dl_list subscriptions; 129 int event_send_all_queued; /* if we are scheduled to send events soon 130 */ 131 132 char *wlanevent; /* the last WLANEvent data */ 133 134 /* FIX: maintain separate structures for each UPnP peer */ 135 struct upnp_wps_peer peer; 136 }; 137 138 /* wps_upnp.c */ 139 void format_date(struct wpabuf *buf); 140 struct subscription * subscription_start(struct upnp_wps_device_sm *sm, 141 const char *callback_urls); 142 struct subscription * subscription_renew(struct upnp_wps_device_sm *sm, 143 const u8 uuid[UUID_LEN]); 144 void subscription_destroy(struct subscription *s); 145 struct subscription * subscription_find(struct upnp_wps_device_sm *sm, 146 const u8 uuid[UUID_LEN]); 147 int send_wpabuf(int fd, struct wpabuf *buf); 148 int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text, 149 u8 mac[ETH_ALEN]); 150 151 /* wps_upnp_ssdp.c */ 152 void msearchreply_state_machine_stop(struct advertisement_state_machine *a); 153 int advertisement_state_machine_start(struct upnp_wps_device_sm *sm); 154 void advertisement_state_machine_stop(struct upnp_wps_device_sm *sm, 155 int send_byebye); 156 void ssdp_listener_stop(struct upnp_wps_device_sm *sm); 157 int ssdp_listener_start(struct upnp_wps_device_sm *sm); 158 int ssdp_listener_open(void); 159 int add_ssdp_network(const char *net_if); 160 int ssdp_open_multicast_sock(u32 ip_addr); 161 int ssdp_open_multicast(struct upnp_wps_device_sm *sm); 162 163 /* wps_upnp_web.c */ 164 int web_listener_start(struct upnp_wps_device_sm *sm); 165 void web_listener_stop(struct upnp_wps_device_sm *sm); 166 167 /* wps_upnp_event.c */ 168 int event_add(struct subscription *s, const struct wpabuf *data); 169 void event_delete_all(struct subscription *s); 170 void event_send_all_later(struct upnp_wps_device_sm *sm); 171 void event_send_stop_all(struct upnp_wps_device_sm *sm); 172 173 /* wps_upnp_ap.c */ 174 int upnp_er_set_selected_registrar(struct wps_registrar *reg, 175 struct subscription *s, 176 const struct wpabuf *msg); 177 void upnp_er_remove_notification(struct subscription *s); 178 179 #endif /* WPS_UPNP_I_H */ 180