549 lines
16 KiB
C
549 lines
16 KiB
C
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2008 - 2009, Digium, Inc.
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*
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* Terry Wilson <twilson@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief Resource for handling iCalendar calendars
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*/
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/*** MODULEINFO
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<depend>res_calendar</depend>
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<depend>neon</depend>
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<depend>ical</depend>
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<support_level>extended</support_level>
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***/
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#include "asterisk.h"
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#include <libical/ical.h>
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#include <ne_session.h>
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#include <ne_uri.h>
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#include <ne_request.h>
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#include <ne_auth.h>
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#include <ne_redirect.h>
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/calendar.h"
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#include "asterisk/lock.h"
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#include "asterisk/config.h"
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#include "asterisk/astobj2.h"
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static void *ical_load_calendar(void *data);
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static void *unref_icalendar(void *obj);
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static struct ast_calendar_tech ical_tech = {
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.type = "ical",
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.module = AST_MODULE,
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.description = "iCalendar .ics calendars",
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.load_calendar = ical_load_calendar,
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.unref_calendar = unref_icalendar,
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};
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struct icalendar_pvt {
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AST_DECLARE_STRING_FIELDS(
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AST_STRING_FIELD(url);
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AST_STRING_FIELD(user);
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AST_STRING_FIELD(secret);
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);
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struct ast_calendar *owner;
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ne_uri uri;
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ne_session *session;
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icalcomponent *data;
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struct ao2_container *events;
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};
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static void icalendar_destructor(void *obj)
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{
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struct icalendar_pvt *pvt = obj;
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ast_debug(1, "Destroying pvt for iCalendar %s\n", pvt->owner->name);
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if (pvt->session) {
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ne_session_destroy(pvt->session);
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}
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if (pvt->data) {
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icalcomponent_free(pvt->data);
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}
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ne_uri_free(&pvt->uri);
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ast_string_field_free_memory(pvt);
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ao2_callback(pvt->events, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL, NULL);
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ao2_ref(pvt->events, -1);
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}
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static void *unref_icalendar(void *obj)
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{
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struct icalendar_pvt *pvt = obj;
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ao2_ref(pvt, -1);
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return NULL;
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}
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static int fetch_response_reader(void *data, const char *block, size_t len)
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{
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struct ast_str **response = data;
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unsigned char *tmp;
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if (!(tmp = ast_malloc(len + 1))) {
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return -1;
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}
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memcpy(tmp, block, len);
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tmp[len] = '\0';
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ast_str_append(response, 0, "%s", tmp);
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ast_free(tmp);
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return 0;
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}
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static int auth_credentials(void *userdata, const char *realm, int attempts, char *username, char *secret)
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{
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struct icalendar_pvt *pvt = userdata;
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if (attempts > 1) {
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ast_log(LOG_WARNING, "Invalid username or password for iCalendar '%s'\n", pvt->owner->name);
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return -1;
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}
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ne_strnzcpy(username, pvt->user, NE_ABUFSIZ);
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ne_strnzcpy(secret, pvt->secret, NE_ABUFSIZ);
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return 0;
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}
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static icalcomponent *fetch_icalendar(struct icalendar_pvt *pvt)
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{
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int ret;
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struct ast_str *response;
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ne_request *req;
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icalcomponent *comp = NULL;
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if (!pvt) {
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ast_log(LOG_ERROR, "There is no private!\n");
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return NULL;
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}
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if (!(response = ast_str_create(512))) {
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ast_log(LOG_ERROR, "Could not allocate memory for response.\n");
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return NULL;
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}
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req = ne_request_create(pvt->session, "GET", pvt->uri.path);
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ne_add_response_body_reader(req, ne_accept_2xx, fetch_response_reader, &response);
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ret = ne_request_dispatch(req);
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ne_request_destroy(req);
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if (ret != NE_OK || !ast_str_strlen(response)) {
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ast_log(LOG_WARNING, "Unable to retrieve iCalendar '%s' from '%s': %s\n", pvt->owner->name, pvt->url, ne_get_error(pvt->session));
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ast_free(response);
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return NULL;
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}
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if (!ast_strlen_zero(ast_str_buffer(response))) {
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comp = icalparser_parse_string(ast_str_buffer(response));
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}
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ast_free(response);
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return comp;
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}
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static time_t icalfloat_to_timet(icaltimetype time)
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{
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struct ast_tm tm = {0,};
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struct timeval tv;
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tm.tm_mday = time.day;
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tm.tm_mon = time.month - 1;
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tm.tm_year = time.year - 1900;
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tm.tm_hour = time.hour;
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tm.tm_min = time.minute;
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tm.tm_sec = time.second;
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tm.tm_isdst = -1;
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tv = ast_mktime(&tm, NULL);
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return tv.tv_sec;
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}
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/* span->start & span->end may be dates or floating times which have no timezone,
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* which would mean that they should apply to the local timezone for all recipients.
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* For example, if a meeting was set for 1PM-2PM floating time, people in different time
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* zones would not be scheduled at the same local times. Dates are often treated as
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* floating times, so all day events will need to be converted--so we can trust the
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* span here, and instead will grab the start and end from the component, which will
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* allow us to test for floating times or dates.
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*/
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static void icalendar_add_event(icalcomponent *comp, struct icaltime_span *span, void *data)
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{
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struct icalendar_pvt *pvt = data;
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struct ast_calendar_event *event;
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icaltimezone *utc = icaltimezone_get_utc_timezone();
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icaltimetype start, end, tmp;
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icalcomponent *valarm;
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icalproperty *prop;
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struct icaltriggertype trigger;
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if (!(pvt && pvt->owner)) {
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ast_log(LOG_ERROR, "Require a private structure with an owner\n");
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return;
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}
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if (!(event = ast_calendar_event_alloc(pvt->owner))) {
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ast_log(LOG_ERROR, "Could not allocate an event!\n");
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return;
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}
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start = icalcomponent_get_dtstart(comp);
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end = icalcomponent_get_dtend(comp);
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event->start = icaltime_get_tzid(start) ? span->start : icalfloat_to_timet(start);
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event->end = icaltime_get_tzid(end) ? span->end : icalfloat_to_timet(end);
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event->busy_state = span->is_busy ? AST_CALENDAR_BS_BUSY : AST_CALENDAR_BS_FREE;
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if ((prop = icalcomponent_get_first_property(comp, ICAL_SUMMARY_PROPERTY))) {
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ast_string_field_set(event, summary, icalproperty_get_value_as_string(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_DESCRIPTION_PROPERTY))) {
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ast_string_field_set(event, description, icalproperty_get_value_as_string(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_ORGANIZER_PROPERTY))) {
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ast_string_field_set(event, organizer, icalproperty_get_value_as_string(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_LOCATION_PROPERTY))) {
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ast_string_field_set(event, location, icalproperty_get_value_as_string(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_CATEGORIES_PROPERTY))) {
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ast_string_field_set(event, categories, icalproperty_get_value_as_string(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_PRIORITY_PROPERTY))) {
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event->priority = icalvalue_get_integer(icalproperty_get_value(prop));
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}
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if ((prop = icalcomponent_get_first_property(comp, ICAL_UID_PROPERTY))) {
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ast_string_field_set(event, uid, icalproperty_get_value_as_string(prop));
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} else {
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ast_log(LOG_WARNING, "No UID found, but one is required. Generating, but updates may not be accurate\n");
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if (!ast_strlen_zero(event->summary)) {
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ast_string_field_set(event, uid, event->summary);
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} else {
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char tmp[AST_TIME_T_LEN];
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ast_time_t_to_string(event->start, tmp, sizeof(tmp));
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ast_string_field_set(event, uid, tmp);
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}
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}
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/*
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* If comp has an RRULE and/or RDATE property, we need to check whether
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* another vevent component supercedes this span. Such a component would
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* have two characteristics:
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* - its UID is the same as comp
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* - its RECURRENCE-ID property is the same time as span->start
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*/
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if (icalcomponent_get_first_property(comp, ICAL_RRULE_PROPERTY)
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|| icalcomponent_get_first_property(comp, ICAL_RDATE_PROPERTY)) {
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icalcompiter comp_iter;
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icaltimetype span_start = icaltime_from_timet_with_zone(
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event->start, icaltime_is_date(start), icaltime_get_timezone(start));
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icaltime_set_timezone(&span_start, icaltime_get_timezone(start));
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for (comp_iter = icalcomponent_begin_component(pvt->data, ICAL_VEVENT_COMPONENT);
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icalcompiter_deref(&comp_iter);
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icalcompiter_next(&comp_iter)) {
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icalcomponent *vevent = icalcompiter_deref(&comp_iter);
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icalproperty *uid = icalcomponent_get_first_property(vevent, ICAL_UID_PROPERTY);
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if (uid && !strcmp(icalproperty_get_value_as_string(uid), event->uid)) {
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icaltimetype recurrence_id = icalcomponent_get_recurrenceid(vevent);
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/* Set the same timezone that we want to compare against */
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icaltime_set_timezone(&recurrence_id, icaltime_get_timezone(start));
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if (!icaltime_compare(recurrence_id, span_start)
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&& icaltime_is_date(span_start) == icaltime_is_date(recurrence_id)) {
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event = ast_calendar_unref_event(event);
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return;
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}
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}
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}
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}
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/* Get the attendees */
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for (prop = icalcomponent_get_first_property(comp, ICAL_ATTENDEE_PROPERTY);
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prop; prop = icalcomponent_get_next_property(comp, ICAL_ATTENDEE_PROPERTY)) {
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struct ast_calendar_attendee *attendee;
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const char *data;
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if (!(attendee = ast_calloc(1, sizeof(*attendee)))) {
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event = ast_calendar_unref_event(event);
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return;
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}
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data = icalproperty_get_attendee(prop);
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if (ast_strlen_zero(data)) {
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ast_free(attendee);
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continue;
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}
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attendee->data = ast_strdup(data);;
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AST_LIST_INSERT_TAIL(&event->attendees, attendee, next);
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}
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/* Only set values for alarm based on VALARM. Can be overriden in main/calendar.c by autoreminder
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* therefore, go ahead and add events even if their is no VALARM or it is malformed
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* Currently we are only getting the first VALARM and are handling repitition in main/calendar.c from calendar.conf */
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if (!(valarm = icalcomponent_get_first_component(comp, ICAL_VALARM_COMPONENT))) {
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ao2_link(pvt->events, event);
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event = ast_calendar_unref_event(event);
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return;
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}
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if (!(prop = icalcomponent_get_first_property(valarm, ICAL_TRIGGER_PROPERTY))) {
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ast_log(LOG_WARNING, "VALARM has no TRIGGER, skipping!\n");
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ao2_link(pvt->events, event);
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event = ast_calendar_unref_event(event);
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return;
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}
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trigger = icalproperty_get_trigger(prop);
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if (icaltriggertype_is_null_trigger(trigger)) {
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ast_log(LOG_WARNING, "Bad TRIGGER for VALARM, skipping!\n");
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ao2_link(pvt->events, event);
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event = ast_calendar_unref_event(event);
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return;
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}
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if (!icaltime_is_null_time(trigger.time)) { /* This is an absolute time */
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tmp = icaltime_convert_to_zone(trigger.time, utc);
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event->alarm = icaltime_as_timet_with_zone(tmp, utc);
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} else { /* Offset from either dtstart or dtend */
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/* XXX Technically you can check RELATED to see if the event fires from the END of the event
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* But, I'm not sure I've ever seen anyone implement it in calendaring software, so I'm ignoring for now */
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tmp = icaltime_add(start, trigger.duration);
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event->alarm = icaltime_as_timet_with_zone(tmp, icaltime_get_timezone(start));
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}
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ao2_link(pvt->events, event);
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event = ast_calendar_unref_event(event);
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return;
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}
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static void icalendar_update_events(struct icalendar_pvt *pvt)
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{
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struct icaltimetype start_time, end_time;
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icalcomponent *iter;
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if (!pvt) {
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ast_log(LOG_ERROR, "iCalendar is NULL\n");
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return;
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}
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if (!pvt->owner) {
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ast_log(LOG_ERROR, "iCalendar is an orphan!\n");
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return;
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}
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if (!pvt->data) {
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ast_log(LOG_ERROR, "The iCalendar has not been parsed!\n");
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return;
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}
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start_time = icaltime_current_time_with_zone(icaltimezone_get_utc_timezone());
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end_time = icaltime_current_time_with_zone(icaltimezone_get_utc_timezone());
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end_time.second += pvt->owner->timeframe * 60;
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end_time = icaltime_normalize(end_time);
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for (iter = icalcomponent_get_first_component(pvt->data, ICAL_VEVENT_COMPONENT);
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iter;
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iter = icalcomponent_get_next_component(pvt->data, ICAL_VEVENT_COMPONENT))
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{
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icalcomponent_foreach_recurrence(iter, start_time, end_time, icalendar_add_event, pvt);
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}
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ast_calendar_merge_events(pvt->owner, pvt->events);
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}
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static void *ical_load_calendar(void *void_data)
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{
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struct icalendar_pvt *pvt;
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const struct ast_config *cfg;
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struct ast_variable *v;
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struct ast_calendar *cal = void_data;
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ast_mutex_t refreshlock;
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if (!(cal && (cfg = ast_calendar_config_acquire()))) {
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ast_log(LOG_ERROR, "You must enable calendar support for res_icalendar to load\n");
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return NULL;
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}
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if (ao2_trylock(cal)) {
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if (cal->unloading) {
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ast_log(LOG_WARNING, "Unloading module, load_calendar cancelled.\n");
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} else {
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ast_log(LOG_WARNING, "Could not lock calendar, aborting!\n");
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}
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ast_calendar_config_release();
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return NULL;
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}
|
||
|
|
||
|
if (!(pvt = ao2_alloc(sizeof(*pvt), icalendar_destructor))) {
|
||
|
ast_log(LOG_ERROR, "Could not allocate icalendar_pvt structure for calendar: %s\n", cal->name);
|
||
|
ast_calendar_config_release();
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
pvt->owner = cal;
|
||
|
|
||
|
if (!(pvt->events = ast_calendar_event_container_alloc())) {
|
||
|
ast_log(LOG_ERROR, "Could not allocate space for fetching events for calendar: %s\n", cal->name);
|
||
|
pvt = unref_icalendar(pvt);
|
||
|
ao2_unlock(cal);
|
||
|
ast_calendar_config_release();
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
if (ast_string_field_init(pvt, 32)) {
|
||
|
ast_log(LOG_ERROR, "Couldn't allocate string field space for calendar: %s\n", cal->name);
|
||
|
pvt = unref_icalendar(pvt);
|
||
|
ao2_unlock(cal);
|
||
|
ast_calendar_config_release();
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
for (v = ast_variable_browse(cfg, cal->name); v; v = v->next) {
|
||
|
if (!strcasecmp(v->name, "url")) {
|
||
|
ast_string_field_set(pvt, url, v->value);
|
||
|
} else if (!strcasecmp(v->name, "user")) {
|
||
|
ast_string_field_set(pvt, user, v->value);
|
||
|
} else if (!strcasecmp(v->name, "secret")) {
|
||
|
ast_string_field_set(pvt, secret, v->value);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
ast_calendar_config_release();
|
||
|
|
||
|
if (ast_strlen_zero(pvt->url)) {
|
||
|
ast_log(LOG_WARNING, "No URL was specified for iCalendar '%s' - skipping.\n", cal->name);
|
||
|
pvt = unref_icalendar(pvt);
|
||
|
ao2_unlock(cal);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
if (ne_uri_parse(pvt->url, &pvt->uri) || pvt->uri.host == NULL || pvt->uri.path == NULL) {
|
||
|
ast_log(LOG_WARNING, "Could not parse url '%s' for iCalendar '%s' - skipping.\n", pvt->url, cal->name);
|
||
|
pvt = unref_icalendar(pvt);
|
||
|
ao2_unlock(cal);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
if (pvt->uri.scheme == NULL) {
|
||
|
pvt->uri.scheme = "http";
|
||
|
}
|
||
|
|
||
|
if (pvt->uri.port == 0) {
|
||
|
pvt->uri.port = ne_uri_defaultport(pvt->uri.scheme);
|
||
|
}
|
||
|
|
||
|
pvt->session = ne_session_create(pvt->uri.scheme, pvt->uri.host, pvt->uri.port);
|
||
|
ne_redirect_register(pvt->session);
|
||
|
ne_set_server_auth(pvt->session, auth_credentials, pvt);
|
||
|
ne_set_useragent(pvt->session, "Asterisk");
|
||
|
if (!strcasecmp(pvt->uri.scheme, "https")) {
|
||
|
ne_ssl_trust_default_ca(pvt->session);
|
||
|
}
|
||
|
|
||
|
cal->tech_pvt = pvt;
|
||
|
|
||
|
ast_mutex_init(&refreshlock);
|
||
|
|
||
|
/* Load it the first time */
|
||
|
if (!(pvt->data = fetch_icalendar(pvt))) {
|
||
|
ast_log(LOG_WARNING, "Unable to parse iCalendar '%s'\n", cal->name);
|
||
|
}
|
||
|
|
||
|
icalendar_update_events(pvt);
|
||
|
|
||
|
ao2_unlock(cal);
|
||
|
|
||
|
/* The only writing from another thread will be if unload is true */
|
||
|
for(;;) {
|
||
|
struct timeval tv = ast_tvnow();
|
||
|
struct timespec ts = {0,};
|
||
|
|
||
|
ts.tv_sec = tv.tv_sec + (60 * pvt->owner->refresh);
|
||
|
|
||
|
ast_mutex_lock(&refreshlock);
|
||
|
while (!pvt->owner->unloading) {
|
||
|
if (ast_cond_timedwait(&pvt->owner->unload, &refreshlock, &ts) == ETIMEDOUT) {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
ast_mutex_unlock(&refreshlock);
|
||
|
|
||
|
if (pvt->owner->unloading) {
|
||
|
ast_debug(10, "Skipping refresh since we got a shutdown signal\n");
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
ast_debug(10, "Refreshing after %d minute timeout\n", pvt->owner->refresh);
|
||
|
|
||
|
/* Free the old calendar data */
|
||
|
if (pvt->data) {
|
||
|
icalcomponent_free(pvt->data);
|
||
|
pvt->data = NULL;
|
||
|
}
|
||
|
if (!(pvt->data = fetch_icalendar(pvt))) {
|
||
|
ast_log(LOG_WARNING, "Unable to parse iCalendar '%s'\n", pvt->owner->name);
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
icalendar_update_events(pvt);
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static int load_module(void)
|
||
|
{
|
||
|
ne_sock_init();
|
||
|
if (ast_calendar_register(&ical_tech)) {
|
||
|
ne_sock_exit();
|
||
|
return AST_MODULE_LOAD_DECLINE;
|
||
|
}
|
||
|
|
||
|
return AST_MODULE_LOAD_SUCCESS;
|
||
|
}
|
||
|
|
||
|
static int unload_module(void)
|
||
|
{
|
||
|
ast_calendar_unregister(&ical_tech);
|
||
|
ne_sock_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Asterisk iCalendar .ics file integration",
|
||
|
.support_level = AST_MODULE_SUPPORT_EXTENDED,
|
||
|
.load = load_module,
|
||
|
.unload = unload_module,
|
||
|
.load_pri = AST_MODPRI_DEVSTATE_PLUGIN,
|
||
|
.requires = "res_calendar",
|
||
|
);
|