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00030 #include "asterisk.h"
00031
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 366880 $")
00033
00034 #include <libical/ical.h>
00035 #include <ne_session.h>
00036 #include <ne_uri.h>
00037 #include <ne_request.h>
00038 #include <ne_auth.h>
00039 #include <ne_redirect.h>
00040 #include <iksemel.h>
00041
00042 #include "asterisk/module.h"
00043 #include "asterisk/calendar.h"
00044 #include "asterisk/lock.h"
00045 #include "asterisk/config.h"
00046 #include "asterisk/astobj2.h"
00047
00048 static void *exchangecal_load_calendar(void *data);
00049 static void *unref_exchangecal(void *obj);
00050 static int exchangecal_write_event(struct ast_calendar_event *event);
00051
00052 static struct ast_calendar_tech exchangecal_tech = {
00053 .type = "exchange",
00054 .description = "MS Exchange calendars",
00055 .module = AST_MODULE,
00056 .load_calendar = exchangecal_load_calendar,
00057 .unref_calendar = unref_exchangecal,
00058 .write_event = exchangecal_write_event,
00059 };
00060
00061 struct exchangecal_pvt {
00062 AST_DECLARE_STRING_FIELDS(
00063 AST_STRING_FIELD(url);
00064 AST_STRING_FIELD(user);
00065 AST_STRING_FIELD(secret);
00066 );
00067 struct ast_calendar *owner;
00068 ne_uri uri;
00069 ne_session *session;
00070 struct ao2_container *events;
00071 };
00072
00073 struct xmlstate {
00074 char tag[80];
00075 int in_response;
00076 int in_propstat;
00077 int in_prop;
00078 void *ptr;
00079 struct exchangecal_pvt *pvt;
00080 };
00081
00082 static int parse_tag(void *data, char *name, char **atts, int type)
00083 {
00084 struct xmlstate *state = data;
00085 char *tmp;
00086
00087 if ((tmp = strchr(name, ':'))) {
00088 tmp++;
00089 } else {
00090 return IKS_HOOK;
00091 }
00092
00093 ast_copy_string(state->tag, tmp, sizeof(state->tag));
00094
00095 switch (type) {
00096 case IKS_OPEN:
00097 if (!strcasecmp(state->tag, "response")) {
00098 struct ast_calendar_event *event;
00099
00100 state->in_response = 1;
00101 if (!(event = ast_calendar_event_alloc(state->pvt->owner))) {
00102 return IKS_NOMEM;
00103 }
00104 state->ptr = event;
00105 } else if (!strcasecmp(state->tag, "propstat")) {
00106 state->in_propstat = 1;
00107 } else if (!strcasecmp(state->tag, "prop")) {
00108 state->in_prop = 1;
00109 }
00110 break;
00111
00112 case IKS_CLOSE:
00113 if (!strcasecmp(state->tag, "response")) {
00114 struct ao2_container *events = state->pvt->events;
00115 struct ast_calendar_event *event = state->ptr;
00116
00117 state->in_response = 0;
00118 if (ast_strlen_zero(event->uid)) {
00119 ast_log(LOG_ERROR, "This event has no UID, something has gone wrong\n");
00120 event = ast_calendar_unref_event(event);
00121 return IKS_HOOK;
00122 }
00123 ao2_link(events, event);
00124 event = ast_calendar_unref_event(event);
00125 } else if (!strcasecmp(state->tag, "propstat")) {
00126 state->in_propstat = 0;
00127 } else if (!strcasecmp(state->tag, "prop")) {
00128 state->in_prop = 0;
00129 }
00130 break;
00131
00132 default:
00133 return IKS_OK;
00134 }
00135
00136 return IKS_OK;
00137 }
00138
00139 static time_t mstime_to_time_t(char *mstime)
00140 {
00141 char *read, *write;
00142 icaltimetype tt;
00143 for (read = write = mstime; *read; read++) {
00144 if (*read == '.') {
00145 *write++ = 'Z';
00146 *write = '\0';
00147 break;
00148 }
00149 if (*read == '-' || *read == ':')
00150 continue;
00151 *write = *read;
00152 write++;
00153 }
00154
00155 tt = icaltime_from_string(mstime);
00156 return icaltime_as_timet(tt);
00157 }
00158
00159 static enum ast_calendar_busy_state msbusy_to_bs(const char *msbusy)
00160 {
00161 if (!strcasecmp(msbusy, "FREE")) {
00162 return AST_CALENDAR_BS_FREE;
00163 } else if (!strcasecmp(msbusy, "TENTATIVE")) {
00164 return AST_CALENDAR_BS_BUSY_TENTATIVE;
00165 } else {
00166 return AST_CALENDAR_BS_BUSY;
00167 }
00168 }
00169
00170 static int parse_cdata(void *data, char *value, size_t len)
00171 {
00172 char *str;
00173 struct xmlstate *state = data;
00174 struct ast_calendar_event *event = state->ptr;
00175
00176
00177 str = ast_skip_blanks(value);
00178
00179 if (str == value + len)
00180 return IKS_OK;
00181
00182 if (!(str = ast_calloc(1, len + 1))) {
00183 return IKS_NOMEM;
00184 }
00185 memcpy(str, value, len);
00186 if (!(state->in_response && state->in_propstat && state->in_prop)) {
00187 ast_free(str);
00188 return IKS_OK;
00189 }
00190
00191
00192 if (!strcasecmp(state->tag, "subject")) {
00193 ast_string_field_build(event, summary, "%s%s", event->summary, str);
00194 } else if (!strcasecmp(state->tag, "location")) {
00195 ast_string_field_build(event, location, "%s%s", event->location, str);
00196 } else if (!strcasecmp(state->tag, "uid")) {
00197 ast_string_field_build(event, uid, "%s%s", event->location, str);
00198 } else if (!strcasecmp(state->tag, "organizer")) {
00199 ast_string_field_build(event, organizer, "%s%s", event->organizer, str);
00200 } else if (!strcasecmp(state->tag, "textdescription")) {
00201 ast_string_field_build(event, description, "%s%s", event->description, str);
00202 } else if (!strcasecmp(state->tag, "dtstart")) {
00203 event->start = mstime_to_time_t(str);
00204 } else if (!strcasecmp(state->tag, "dtend")) {
00205 event->end = mstime_to_time_t(str);
00206 } else if (!strcasecmp(state->tag, "busystatus")) {
00207 event->busy_state = msbusy_to_bs(str);
00208 } else if (!strcasecmp(state->tag, "reminderoffset")) {
00209
00210
00211 event->alarm = event->start - atoi(str);
00212 }
00213
00214 ast_free(str);
00215 return IKS_OK;
00216 }
00217
00218 static void exchangecal_destructor(void *obj)
00219 {
00220 struct exchangecal_pvt *pvt = obj;
00221
00222 ast_debug(1, "Destroying pvt for Exchange calendar %s\n", pvt->owner->name);
00223 if (pvt->session) {
00224 ne_session_destroy(pvt->session);
00225 }
00226 ast_string_field_free_memory(pvt);
00227
00228 ao2_callback(pvt->events, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL, NULL);
00229
00230 ao2_ref(pvt->events, -1);
00231 }
00232
00233 static void *unref_exchangecal(void *obj)
00234 {
00235 struct exchangecal_pvt *pvt = obj;
00236
00237 ao2_ref(pvt, -1);
00238 return NULL;
00239 }
00240
00241
00242 static struct ast_str *generate_exchange_uuid(struct ast_str *uid)
00243 {
00244 unsigned short val[8];
00245 int x;
00246
00247 for (x = 0; x < 8; x++) {
00248 val[x] = ast_random();
00249 }
00250 ast_str_set(&uid, 0, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x", val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
00251
00252 return uid;
00253 }
00254
00255 static int is_valid_uuid(struct ast_str *uid)
00256 {
00257 int i;
00258
00259 if (ast_str_strlen(uid) != 36) {
00260 return 0;
00261 }
00262
00263 for (i = 0; i < ast_str_strlen(uid); i++) {
00264 if (i == 8 || i == 13 || i == 18 || i == 23) {
00265 if (ast_str_buffer(uid)[i] != '-') {
00266 return 0;
00267 }
00268 } else if (!((ast_str_buffer(uid)[i] > 47 && ast_str_buffer(uid)[i] < 58) || (ast_str_buffer(uid)[i] > 96 && ast_str_buffer(uid)[i] < 103))) {
00269 return 0;
00270 }
00271 }
00272
00273 return 1;
00274 }
00275
00276 static struct ast_str *xml_encode_str(struct ast_str *dst, const char *src)
00277 {
00278 const char *tmp;
00279 char buf[7];
00280
00281 for (tmp = src; *tmp; tmp++) {
00282 switch (*tmp) {
00283 case '\"':
00284 strcpy(buf, """);
00285 break;
00286
00287 case '\'':
00288 strcpy(buf, "'");
00289 break;
00290
00291 case '&':
00292 strcpy(buf, "&");
00293 break;
00294
00295 case '<':
00296 strcpy(buf, "<");
00297 break;
00298
00299 case '>':
00300 strcpy(buf, ">");
00301 break;
00302
00303 default:
00304 sprintf(buf, "%c", *tmp);
00305 }
00306
00307 ast_str_append(&dst, 0, "%s", buf);
00308 }
00309
00310 return dst;
00311 }
00312
00313 static struct ast_str *epoch_to_exchange_time(struct ast_str *dst, time_t epoch)
00314 {
00315 icaltimezone *utc = icaltimezone_get_utc_timezone();
00316 icaltimetype tt = icaltime_from_timet_with_zone(epoch, 0, utc);
00317 char tmp[30];
00318 int i;
00319
00320 ast_copy_string(tmp, icaltime_as_ical_string(tt), sizeof(tmp));
00321 for (i = 0; tmp[i]; i++) {
00322 ast_str_append(&dst, 0, "%c", tmp[i]);
00323 if (i == 3 || i == 5)
00324 ast_str_append(&dst, 0, "%c", '-');
00325 if (i == 10 || i == 12)
00326 ast_str_append(&dst, 0, "%c", ':');
00327 if (i == 14)
00328 ast_str_append(&dst, 0, "%s", ".000");
00329 }
00330
00331 return dst;
00332 }
00333
00334 static struct ast_str *bs_to_exchange_bs(struct ast_str *dst, enum ast_calendar_busy_state bs)
00335 {
00336 switch (bs) {
00337 case AST_CALENDAR_BS_BUSY:
00338 ast_str_set(&dst, 0, "%s", "BUSY");
00339 break;
00340
00341 case AST_CALENDAR_BS_BUSY_TENTATIVE:
00342 ast_str_set(&dst, 0, "%s", "TENTATIVE");
00343 break;
00344
00345 default:
00346 ast_str_set(&dst, 0, "%s", "FREE");
00347 }
00348
00349 return dst;
00350 }
00351
00352 static int fetch_response_reader(void *data, const char *block, size_t len)
00353 {
00354 struct ast_str **response = data;
00355 unsigned char *tmp;
00356
00357 if (!(tmp = ast_malloc(len + 1))) {
00358 return -1;
00359 }
00360 memcpy(tmp, block, len);
00361 tmp[len] = '\0';
00362 ast_str_append(response, 0, "%s", tmp);
00363 ast_free(tmp);
00364
00365 return 0;
00366 }
00367
00368 static int auth_credentials(void *userdata, const char *realm, int attempts, char *username, char *secret)
00369 {
00370 struct exchangecal_pvt *pvt = userdata;
00371
00372 if (attempts > 1) {
00373 ast_log(LOG_WARNING, "Invalid username or password for Exchange calendar '%s'\n", pvt->owner->name);
00374 return -1;
00375 }
00376
00377 ne_strnzcpy(username, pvt->user, NE_ABUFSIZ);
00378 ne_strnzcpy(secret, pvt->secret, NE_ABUFSIZ);
00379
00380 return 0;
00381 }
00382
00383 static struct ast_str *exchangecal_request(struct exchangecal_pvt *pvt, const char *method, struct ast_str *req_body, struct ast_str *subdir)
00384 {
00385 struct ast_str *response;
00386 ne_request *req;
00387 int ret;
00388 char buf[1000];
00389
00390 if (!pvt) {
00391 ast_log(LOG_ERROR, "There is no private!\n");
00392 return NULL;
00393 }
00394
00395 if (!(response = ast_str_create(512))) {
00396 ast_log(LOG_ERROR, "Could not allocate memory for response.\n");
00397 return NULL;
00398 }
00399
00400 snprintf(buf, sizeof(buf), "%s%s", pvt->uri.path, subdir ? ast_str_buffer(subdir) : "");
00401
00402 req = ne_request_create(pvt->session, method, buf);
00403 ne_add_response_body_reader(req, ne_accept_2xx, fetch_response_reader, &response);
00404 ne_set_request_body_buffer(req, ast_str_buffer(req_body), ast_str_strlen(req_body));
00405 ne_add_request_header(req, "Content-type", "text/xml");
00406
00407 ret = ne_request_dispatch(req);
00408 ne_request_destroy(req);
00409
00410 if (ret != NE_OK || !ast_str_strlen(response)) {
00411 ast_log(LOG_WARNING, "Unknown response to CalDAV calendar %s, request %s to %s: %s\n", pvt->owner->name, method, pvt->url, ne_get_error(pvt->session));
00412 ast_free(response);
00413 return NULL;
00414 }
00415
00416 return response;
00417 }
00418
00419 static int exchangecal_write_event(struct ast_calendar_event *event)
00420 {
00421 struct ast_str *body = NULL, *response = NULL, *subdir = NULL;
00422 struct ast_str *uid = NULL, *summary = NULL, *description = NULL, *organizer = NULL,
00423 *location = NULL, *start = NULL, *end = NULL, *busystate = NULL;
00424 int ret = -1;
00425
00426 if (!event) {
00427 ast_log(LOG_WARNING, "No event passed!\n");
00428 return -1;
00429 }
00430
00431 if (!(event->start && event->end)) {
00432 ast_log(LOG_WARNING, "The event must contain a start and an end\n");
00433 return -1;
00434 }
00435 if (!(body = ast_str_create(512)) ||
00436 !(subdir = ast_str_create(32))) {
00437 ast_log(LOG_ERROR, "Could not allocate memory for request!\n");
00438 goto write_cleanup;
00439 }
00440
00441 if (!(uid = ast_str_create(32)) ||
00442 !(summary = ast_str_create(32)) ||
00443 !(description = ast_str_create(32)) ||
00444 !(organizer = ast_str_create(32)) ||
00445 !(location = ast_str_create(32)) ||
00446 !(start = ast_str_create(32)) ||
00447 !(end = ast_str_create(32)) ||
00448 !(busystate = ast_str_create(32))) {
00449 ast_log(LOG_ERROR, "Unable to allocate memory for request values\n");
00450 goto write_cleanup;
00451 }
00452
00453 if (ast_strlen_zero(event->uid)) {
00454 uid = generate_exchange_uuid(uid);
00455 } else {
00456 ast_str_set(&uid, 36, "%s", event->uid);
00457 }
00458
00459 if (!is_valid_uuid(uid)) {
00460 ast_log(LOG_WARNING, "An invalid uid was provided, you may leave this field blank to have one generated for you\n");
00461 goto write_cleanup;
00462 }
00463
00464 summary = xml_encode_str(summary, event->summary);
00465 description = xml_encode_str(description, event->description);
00466 organizer = xml_encode_str(organizer, event->organizer);
00467 location = xml_encode_str(location, event->location);
00468 start = epoch_to_exchange_time(start, event->start);
00469 end = epoch_to_exchange_time(end, event->end);
00470 busystate = bs_to_exchange_bs(busystate, event->busy_state);
00471
00472 ast_str_append(&body, 0,
00473 "<?xml version=\"1.0\"?>\n"
00474 "<a:propertyupdate\n"
00475 " xmlns:a=\"DAV:\"\n"
00476 " xmlns:e=\"http://schemas.microsoft.com/exchange/\"\n"
00477 " xmlns:mapi=\"http://schemas.microsoft.com/mapi/\"\n"
00478 " xmlns:mapit=\"http://schemas.microsoft.com/mapi/proptag/\"\n"
00479 " xmlns:x=\"xml:\" xmlns:cal=\"urn:schemas:calendar:\"\n"
00480 " xmlns:dt=\"uuid:%s/\"\n"
00481 " xmlns:header=\"urn:schemas:mailheader:\"\n"
00482 " xmlns:mail=\"urn:schemas:httpmail:\"\n"
00483 ">\n"
00484 " <a:set>\n"
00485 " <a:prop>\n"
00486 " <a:contentclass>urn:content-classes:appointment</a:contentclass>\n"
00487 " <e:outlookmessageclass>IPM.Appointment</e:outlookmessageclass>\n"
00488 " <mail:subject>%s</mail:subject>\n"
00489 " <mail:description>%s</mail:description>\n"
00490 " <header:to>%s</header:to>\n"
00491 " <cal:location>%s</cal:location>\n"
00492 " <cal:dtstart dt:dt=\"dateTime.tz\">%s</cal:dtstart>\n"
00493 " <cal:dtend dt:dt=\"dateTime.tz\">%s</cal:dtend>\n"
00494 " <cal:instancetype dt:dt=\"int\">0</cal:instancetype>\n"
00495 " <cal:busystatus>%s</cal:busystatus>\n"
00496 " <cal:meetingstatus>CONFIRMED</cal:meetingstatus>\n"
00497 " <cal:alldayevent dt:dt=\"boolean\">0</cal:alldayevent>\n"
00498 " <cal:responserequested dt:dt=\"boolean\">0</cal:responserequested>\n"
00499 " <mapi:finvited dt:dt=\"boolean\">1</mapi:finvited>\n"
00500 " </a:prop>\n"
00501 " </a:set>\n"
00502 "</a:propertyupdate>\n",
00503 ast_str_buffer(uid), ast_str_buffer(summary), ast_str_buffer(description), ast_str_buffer(organizer), ast_str_buffer(location), ast_str_buffer(start), ast_str_buffer(end), ast_str_buffer(busystate));
00504 ast_verb(0, "\n\n%s\n\n", ast_str_buffer(body));
00505 ast_str_set(&subdir, 0, "/Calendar/%s.eml", ast_str_buffer(uid));
00506
00507 response = exchangecal_request(event->owner->tech_pvt, "PROPPATCH", body, subdir);
00508
00509 ret = 0;
00510 write_cleanup:
00511 if (uid) {
00512 ast_free(uid);
00513 }
00514 if (summary) {
00515 ast_free(summary);
00516 }
00517 if (description) {
00518 ast_free(description);
00519 }
00520 if (organizer) {
00521 ast_free(organizer);
00522 }
00523 if (location) {
00524 ast_free(location);
00525 }
00526 if (start) {
00527 ast_free(start);
00528 }
00529 if (end) {
00530 ast_free(end);
00531 }
00532 if (busystate) {
00533 ast_free(busystate);
00534 }
00535 if (body) {
00536 ast_free(body);
00537 }
00538 if (response) {
00539 ast_free(response);
00540 }
00541 if (subdir) {
00542 ast_free(subdir);
00543 }
00544
00545 return ret;
00546 }
00547
00548
00549 static struct ast_str *exchangecal_get_events_between(struct exchangecal_pvt *pvt, time_t start_time, time_t end_time)
00550 {
00551 struct ast_str *body, *response;
00552 char start[80], end[80];
00553 struct timeval tv = {0,};
00554 struct ast_tm tm;
00555
00556 tv.tv_sec = start_time;
00557 ast_localtime(&tv, &tm, "UTC");
00558 ast_strftime(start, sizeof(start), "%Y/%m/%d %T", &tm);
00559
00560 tv.tv_sec = end_time;
00561 ast_localtime(&tv, &tm, "UTC");
00562 ast_strftime(end, sizeof(end), "%Y/%m/%d %T", &tm);
00563
00564 if (!(body = ast_str_create(512))) {
00565 ast_log(LOG_ERROR, "Could not allocate memory for body of request!\n");
00566 return NULL;
00567 }
00568
00569 ast_str_append(&body, 0,
00570 "<?xml version=\"1.0\"?>\n"
00571 "<g:searchrequest xmlns:g=\"DAV:\">\n"
00572 " <g:sql> SELECT \"urn:schemas:calendar:location\", \"urn:schemas:httpmail:subject\",\n"
00573 " \"urn:schemas:calendar:dtstart\", \"urn:schemas:calendar:dtend\",\n"
00574 " \"urn:schemas:calendar:busystatus\", \"urn:schemas:calendar:instancetype\",\n"
00575 " \"urn:schemas:calendar:uid\", \"urn:schemas:httpmail:textdescription\",\n"
00576 " \"urn:schemas:calendar:organizer\", \"urn:schemas:calendar:reminderoffset\"\n"
00577 " FROM Scope('SHALLOW TRAVERSAL OF \"%s/Calendar\"')\n"
00578 " WHERE NOT \"urn:schemas:calendar:instancetype\" = 1\n"
00579 " AND \"DAV:contentclass\" = 'urn:content-classes:appointment'\n"
00580 " AND NOT (\"urn:schemas:calendar:dtend\" < '%s'\n"
00581 " OR \"urn:schemas:calendar:dtstart\" > '%s')\n"
00582 " ORDER BY \"urn:schemas:calendar:dtstart\" ASC\n"
00583 " </g:sql>\n"
00584 "</g:searchrequest>\n", pvt->url, start, end);
00585
00586 ast_debug(5, "Request:\n%s\n", ast_str_buffer(body));
00587 response = exchangecal_request(pvt, "SEARCH", body, NULL);
00588 ast_debug(5, "Response:\n%s\n", ast_str_buffer(response));
00589 ast_free(body);
00590
00591 return response;
00592 }
00593
00594 static int update_exchangecal(struct exchangecal_pvt *pvt)
00595 {
00596 struct xmlstate state;
00597 struct timeval now = ast_tvnow();
00598 time_t start, end;
00599 struct ast_str *response;
00600 iksparser *p;
00601
00602 state.pvt = pvt;
00603 start = now.tv_sec;
00604 end = now.tv_sec + 60 * pvt->owner->timeframe;
00605 if (!(response = exchangecal_get_events_between(pvt, start, end))) {
00606 return -1;
00607 }
00608
00609 p = iks_sax_new(&state, parse_tag, parse_cdata);
00610 iks_parse(p, ast_str_buffer(response), ast_str_strlen(response), 1);
00611 ast_calendar_merge_events(pvt->owner, pvt->events);
00612 ast_free(response);
00613
00614 return 0;
00615 }
00616
00617 static void *exchangecal_load_calendar(void *void_data)
00618 {
00619 struct exchangecal_pvt *pvt;
00620 const struct ast_config *cfg;
00621 struct ast_variable *v;
00622 struct ast_calendar *cal = void_data;
00623 ast_mutex_t refreshlock;
00624
00625 if (!(cal && (cfg = ast_calendar_config_acquire()))) {
00626 ast_log(LOG_ERROR, "You must enable calendar support for res_exchangecal to load\n");
00627 return NULL;
00628 }
00629
00630 if (ao2_trylock(cal)) {
00631 if (cal->unloading) {
00632 ast_log(LOG_WARNING, "Unloading module, load_calendar cancelled.\n");
00633 } else {
00634 ast_log(LOG_WARNING, "Could not lock calendar, aborting!\n");
00635 }
00636 ast_calendar_config_release();
00637 return NULL;
00638 }
00639
00640 if (!(pvt = ao2_alloc(sizeof(*pvt), exchangecal_destructor))) {
00641 ast_log(LOG_ERROR, "Could not allocate exchangecal_pvt structure for calendar: %s\n", cal->name);
00642 ast_calendar_config_release();
00643 return NULL;
00644 }
00645
00646 pvt->owner = cal;
00647
00648 if (!(pvt->events = ast_calendar_event_container_alloc())) {
00649 ast_log(LOG_ERROR, "Could not allocate space for fetching events for calendar: %s\n", cal->name);
00650 pvt = unref_exchangecal(pvt);
00651 ao2_unlock(cal);
00652 ast_calendar_config_release();
00653 return NULL;
00654 }
00655
00656 if (ast_string_field_init(pvt, 32)) {
00657 ast_log(LOG_ERROR, "Couldn't allocate string field space for calendar: %s\n", cal->name);
00658 pvt = unref_exchangecal(pvt);
00659 ao2_unlock(cal);
00660 ast_calendar_config_release();
00661 return NULL;
00662 }
00663
00664 for (v = ast_variable_browse(cfg, cal->name); v; v = v->next) {
00665 if (!strcasecmp(v->name, "url")) {
00666 ast_string_field_set(pvt, url, v->value);
00667 } else if (!strcasecmp(v->name, "user")) {
00668 ast_string_field_set(pvt, user, v->value);
00669 } else if (!strcasecmp(v->name, "secret")) {
00670 ast_string_field_set(pvt, secret, v->value);
00671 }
00672 }
00673
00674 ast_calendar_config_release();
00675
00676 if (ast_strlen_zero(pvt->url)) {
00677 ast_log(LOG_WARNING, "No URL was specified for Exchange calendar '%s' - skipping.\n", cal->name);
00678 pvt = unref_exchangecal(pvt);
00679 ao2_unlock(cal);
00680 return NULL;
00681 }
00682
00683 if (ne_uri_parse(pvt->url, &pvt->uri) || pvt->uri.host == NULL || pvt->uri.path == NULL) {
00684 ast_log(LOG_WARNING, "Could not parse url '%s' for Exchange calendar '%s' - skipping.\n", pvt->url, cal->name);
00685 pvt = unref_exchangecal(pvt);
00686 ao2_unlock(cal);
00687 return NULL;
00688 }
00689
00690 if (pvt->uri.scheme == NULL) {
00691 pvt->uri.scheme = "http";
00692 }
00693
00694 if (pvt->uri.port == 0) {
00695 pvt->uri.port = ne_uri_defaultport(pvt->uri.scheme);
00696 }
00697
00698 pvt->session = ne_session_create(pvt->uri.scheme, pvt->uri.host, pvt->uri.port);
00699 ne_redirect_register(pvt->session);
00700 ne_set_server_auth(pvt->session, auth_credentials, pvt);
00701 if (!strcasecmp(pvt->uri.scheme, "https")) {
00702 ne_ssl_trust_default_ca(pvt->session);
00703 }
00704
00705 cal->tech_pvt = pvt;
00706
00707 ast_mutex_init(&refreshlock);
00708
00709
00710 update_exchangecal(pvt);
00711
00712 ao2_unlock(cal);
00713
00714
00715 for (;;) {
00716 struct timeval tv = ast_tvnow();
00717 struct timespec ts = {0,};
00718
00719 ts.tv_sec = tv.tv_sec + (60 * pvt->owner->refresh);
00720
00721 ast_mutex_lock(&refreshlock);
00722 while (!pvt->owner->unloading) {
00723 if (ast_cond_timedwait(&pvt->owner->unload, &refreshlock, &ts) == ETIMEDOUT) {
00724 break;
00725 }
00726 }
00727 ast_mutex_unlock(&refreshlock);
00728
00729 if (pvt->owner->unloading) {
00730 ast_debug(10, "Skipping refresh since we got a shutdown signal\n");
00731 return NULL;
00732 }
00733
00734 ast_debug(10, "Refreshing after %d minute timeout\n", pvt->owner->refresh);
00735
00736 update_exchangecal(pvt);
00737 }
00738
00739 return NULL;
00740 }
00741
00742 static int load_module(void)
00743 {
00744 ne_sock_init();
00745 if (ast_calendar_register(&exchangecal_tech)) {
00746 ne_sock_exit();
00747 return AST_MODULE_LOAD_DECLINE;
00748 }
00749
00750 return AST_MODULE_LOAD_SUCCESS;
00751 }
00752
00753 static int unload_module(void)
00754 {
00755 ast_calendar_unregister(&exchangecal_tech);
00756 ne_sock_exit();
00757 return 0;
00758 }
00759
00760 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Asterisk MS Exchange Calendar Integration",
00761 .load = load_module,
00762 .unload = unload_module,
00763 .load_pri = AST_MODPRI_DEVSTATE_PLUGIN,
00764 );