18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * UPnP WPS Device - Event processing 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2000-2003 Intel Corporation 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2006-2007 Sony Corporation 58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2008-2009 Atheros Communications 68d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi> 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * See wps_upnp.c for more details on licensing and code history. 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <assert.h> 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eloop.h" 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "uuid.h" 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "http_client.h" 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wps_defs.h" 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wps_upnp.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wps_upnp_i.h" 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Event message generation (to subscribers) 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * We make a separate copy for each message for each subscriber. This memory 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * wasted could be limited (adding code complexity) by sharing copies, keeping 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * a usage count and freeing when zero. 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Sending a message requires using a HTTP over TCP NOTIFY 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * (like a PUT) which requires a number of states.. 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define MAX_EVENTS_QUEUED 20 /* How far behind queued events */ 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define MAX_FAILURES 10 /* Drop subscription after this many failures */ 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* How long to wait before sending event */ 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EVENT_DELAY_SECONDS 0 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EVENT_DELAY_MSEC 0 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Event information that we send to each subscriber is remembered in this 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * struct. The event cannot be sent by simple UDP; it has to be sent by a HTTP 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * over TCP transaction which requires various states.. It may also need to be 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * retried at a different address (if more than one is available). 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * TODO: As an optimization we could share data between subscribers. 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct wps_event_ { 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct dl_list list; 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscription *s; /* parent */ 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned subscriber_sequence; /* which event for this subscription*/ 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int retry; /* which retry */ 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscr_addr *addr; /* address to connect to */ 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *data; /* event data to send */ 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct http_client *http_event; 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_clean -- clean sockets etc. of event 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Leaves data, retry count etc. alone. 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_clean(struct wps_event_ *e) 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e->s->current_event == e) 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->s->current_event = NULL; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt http_client_free(e->http_event); 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->http_event = NULL; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_delete -- delete single unqueued event 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * (be sure to dequeue first if need be) 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_delete(struct wps_event_ *e) 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Delete event %p", e); 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_clean(e); 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_free(e->data); 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(e); 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_dequeue -- get next event from the queue 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns NULL if empty. 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wps_event_ *event_dequeue(struct subscription *s) 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wps_event_ *e; 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e = dl_list_first(&s->event_queue, struct wps_event_, list); 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e) { 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Dequeue event %p for " 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "subscription %p", e, s); 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_del(&e->list); 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return e; 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_delete_all -- delete entire event queue and current event */ 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid event_delete_all(struct subscription *s) 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wps_event_ *e; 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt while ((e = event_dequeue(s)) != NULL) 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_delete(e); 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (s->current_event) { 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_delete(s->current_event); 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* will set: s->current_event = NULL; */ 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * event_retry - Called when we had a failure delivering event msg 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @e: Event 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @do_next_address: skip address e.g. on connect fail 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_retry(struct wps_event_ *e, int do_next_address) 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscription *s = e->s; 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct upnp_wps_device_sm *sm = s->sm; 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Retry event %p for subscription %p", 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e, s); 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_clean(e); 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* will set: s->current_event = NULL; */ 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (do_next_address) { 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->retry++; 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Try address %d", e->retry); 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e->retry >= dl_list_len(&s->addr_list)) { 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Giving up on sending event " 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "for %s", e->addr->domain_and_port); 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_delete(e); 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt s->last_event_failed = 1; 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!dl_list_empty(&s->event_queue)) 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later(s->sm); 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_add(&s->event_queue, &e->list); 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later(sm); 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * event_build_message(struct wps_event_ *e) 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *buf; 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char *b; 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = wpabuf_alloc(1000 + wpabuf_len(e->data)); 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (buf == NULL) 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_printf(buf, "NOTIFY %s HTTP/1.1\r\n", e->addr->path); 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_str(buf, "SERVER: Unspecified, UPnP/1.0, Unspecified\r\n"); 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_printf(buf, "HOST: %s\r\n", e->addr->domain_and_port); 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_str(buf, "CONTENT-TYPE: text/xml; charset=\"utf-8\"\r\n" 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "NT: upnp:event\r\n" 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "NTS: upnp:propchange\r\n"); 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_str(buf, "SID: uuid:"); 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt b = wpabuf_put(buf, 0); 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt uuid_bin2str(e->s->uuid, b, 80); 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put(buf, os_strlen(b)); 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_str(buf, "\r\n"); 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_printf(buf, "SEQ: %u\r\n", e->subscriber_sequence); 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_printf(buf, "CONTENT-LENGTH: %d\r\n", 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (int) wpabuf_len(e->data)); 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_str(buf, "\r\n"); /* terminating empty line */ 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_buf(buf, e->data); 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return buf; 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_addr_failure(struct wps_event_ *e) 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscription *s = e->s; 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->addr->num_failures++; 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Failed to send event %p to %s " 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(num_failures=%u)", 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e, e->addr->domain_and_port, e->addr->num_failures); 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e->addr->num_failures < MAX_FAILURES) { 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Try other addresses, if available */ 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_retry(e, 1); 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * If other side doesn't like what we say, forget about them. 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * (There is no way to tell other side that we are dropping them...). 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Deleting subscription %p " 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "address %s due to errors", s, e->addr->domain_and_port); 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_del(&e->addr->list); 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subscr_addr_delete(e->addr); 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->addr = NULL; 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (dl_list_empty(&s->addr_list)) { 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* if we've given up on all addresses */ 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Removing subscription %p " 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "with no addresses", s); 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_del(&s->list); 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subscription_destroy(s); 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Try other addresses, if available */ 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_retry(e, 0); 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_http_cb(void *ctx, struct http_client *c, 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum http_client_event event) 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wps_event_ *e = ctx; 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscription *s = e->s; 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: HTTP client callback: e=%p c=%p " 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "event=%d", e, c, event); 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (event) { 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case HTTP_CLIENT_OK: 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "WPS UPnP: Got event %p reply OK from %s", 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e, e->addr->domain_and_port); 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->addr->num_failures = 0; 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt s->last_event_failed = 0; 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_delete(e); 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Schedule sending more if there is more to send */ 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!dl_list_empty(&s->event_queue)) 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later(s->sm); 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case HTTP_CLIENT_FAILED: 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Event send failure"); 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_addr_failure(e); 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case HTTP_CLIENT_INVALID_REPLY: 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Invalid reply"); 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_addr_failure(e); 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case HTTP_CLIENT_TIMEOUT: 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Event send timeout"); 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_addr_failure(e); 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_send_start -- prepare to send a event message to subscriber 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This gets complicated because: 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- The message is sent via TCP and we have to keep the stream open 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * for 30 seconds to get a response... then close it. 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- But we might have other event happen in the meantime... 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * we have to queue them, if we lose them then the subscriber will 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * be forced to unsubscribe and subscribe again. 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- If multiple URLs are provided then we are supposed to try successive 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * ones after 30 second timeout. 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- The URLs might use domain names instead of dotted decimal addresses, 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * and resolution of those may cause unwanted sleeping. 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- Doing the initial TCP connect can take a while, so we have to come 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * back after connection and then send the data. 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns nonzero on error; 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Prerequisite: No current event send (s->current_event == NULL) 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * and non-empty queue. 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int event_send_start(struct subscription *s) 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wps_event_ *e; 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int itry; 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *buf; 2748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 2768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Assume we are called ONLY with no current event and ONLY with 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * nonempty event queue and ONLY with at least one address to send to. 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (dl_list_empty(&s->addr_list)) 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (s->current_event) 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (dl_list_empty(&s->event_queue)) 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt s->current_event = e = event_dequeue(s); 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Use address according to number of retries */ 2898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt itry = 0; 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_for_each(e->addr, &s->addr_list, struct subscr_addr, list) 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (itry++ == e->retry) 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (itry < e->retry) 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = event_build_message(e); 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (buf == NULL) { 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_retry(e, 0); 2998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->http_event = http_client_addr(&e->addr->saddr, buf, 0, 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_http_cb, e); 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e->http_event == NULL) { 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_free(buf); 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_retry(e, 0); 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_send_all_later_handler -- actually send events as needed */ 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void event_send_all_later_handler(void *eloop_data, void *user_ctx) 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct upnp_wps_device_sm *sm = user_ctx; 3188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct subscription *s, *tmp; 3198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int nerrors = 0; 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->event_send_all_queued = 0; 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_for_each_safe(s, tmp, &sm->subscriptions, struct subscription, 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt list) { 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (s->current_event == NULL /* not busy */ && 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt !dl_list_empty(&s->event_queue) /* more to do */) { 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (event_send_start(s)) 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt nerrors++; 3288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (nerrors) { 3328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Try again later */ 3338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later(sm); 3348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_send_all_later -- schedule sending events to all subscribers 3398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * that need it. 3408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This avoids two problems: 3418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- After getting a subscription, we should not send the first event 3428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * until after our reply is fully queued to be sent back, 3438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * -- Possible stack depth or infinite recursion issues. 3448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid event_send_all_later(struct upnp_wps_device_sm *sm) 3468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * The exact time in the future isn't too important. Waiting a bit 3498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * might let us do several together. 3508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sm->event_send_all_queued) 3528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->event_send_all_queued = 1; 3548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_timeout(EVENT_DELAY_SECONDS, EVENT_DELAY_MSEC, 3558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later_handler, NULL, sm); 3568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* event_send_stop_all -- cleanup */ 3608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid event_send_stop_all(struct upnp_wps_device_sm *sm) 3618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sm->event_send_all_queued) 3638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_cancel_timeout(event_send_all_later_handler, NULL, sm); 3648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->event_send_all_queued = 0; 3658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 3698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * event_add - Add a new event to a queue 3708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @s: Subscription 3718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @data: Event data (is copied; caller retains ownership) 3728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @probereq: Whether this is a Probe Request event 3738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns: 0 on success, -1 on error, 1 on max event queue limit reached 3748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint event_add(struct subscription *s, const struct wpabuf *data, int probereq) 3768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wps_event_ *e; 3788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int len; 3798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = dl_list_len(&s->event_queue); 3818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (len >= MAX_EVENTS_QUEUED) { 3828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Too many events queued for " 3838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "subscriber %p", s); 3848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (probereq) 3858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 1; 3868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Drop oldest entry to allow EAP event to be stored. */ 3888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e = event_dequeue(s); 3898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!e) 3908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 1; 3918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_delete(e); 3928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (s->last_event_failed && probereq && len > 0) { 3958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Avoid queuing frames for subscribers that may have left 3978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * without unsubscribing. 3988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Do not queue more Probe " 4008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "Request frames for subscription %p since last " 4018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "delivery failed", s); 4028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 4038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e = os_zalloc(sizeof(*e)); 4068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e == NULL) 4078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 4088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_init(&e->list); 4098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->s = s; 4108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->data = wpabuf_dup(data); 4118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (e->data == NULL) { 4128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(e); 4138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 4148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e->subscriber_sequence = s->next_subscriber_sequence++; 4168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (s->next_subscriber_sequence == 0) 4178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt s->next_subscriber_sequence++; 4188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WPS UPnP: Queue event %p for subscriber %p " 4198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(queue len %u)", e, s, len + 1); 4208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dl_list_add_tail(&s->event_queue, &e->list); 4218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt event_send_all_later(s->sm); 4228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 4238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 424