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/**
* @file mwi.c Message Waiting Indication (RFC 3842)
*
* Copyright (C) 2010 - 2015 Creytiv.com
*/
#include <string.h>
#include <re.h>
#include <baresip.h>
/**
* @defgroup mwi mwi
*
* Message Waiting Indication
*
*/
struct mwi {
struct le le;
struct sipsub *sub;
struct ua *ua;
struct tmr tmr;
bool shutdown;
};
static struct tmr tmr;
static struct list mwil;
static void destructor(void *arg)
{
struct mwi *mwi = arg;
tmr_cancel(&mwi->tmr);
list_unlink(&mwi->le);
mem_deref(mwi->sub);
mem_deref(mwi->ua);
}
static void deref_handler(void *arg)
{
struct mwi *mwi = arg;
mem_deref(mwi);
}
static int auth_handler(char **username, char **password,
const char *realm, void *arg)
{
struct account *acc = arg;
return account_auth(acc, username, password, realm);
}
static void notify_handler(struct sip *sip, const struct sip_msg *msg,
void *arg)
{
struct mwi *mwi = arg;
if (mbuf_get_left(msg->mb)) {
struct ui_sub *uis = baresip_uis();
ui_output(uis, "----- MWI for %s -----\n", ua_aor(mwi->ua));
ui_output(uis, "%b\n", mbuf_buf(msg->mb),
mbuf_get_left(msg->mb));
}
(void)sip_treply(NULL, sip, msg, 200, "OK");
if (mwi->shutdown)
mem_deref(mwi);
}
static void close_handler(int err, const struct sip_msg *msg,
const struct sipevent_substate *substate,
void *arg)
{
struct mwi *mwi = arg;
(void)substate;
info("mwi: subscription for %s closed: %s (%u %r)\n",
ua_aor(mwi->ua),
err ? strerror(err) : "",
err ? 0 : msg->scode,
err ? 0 : &msg->reason);
mem_deref(mwi);
}
static int mwi_subscribe(struct ua *ua)
{
const char *routev[1];
struct mwi *mwi;
int err;
mwi = mem_zalloc(sizeof(*mwi), destructor);
if (!mwi)
return ENOMEM;
list_append(&mwil, &mwi->le, mwi);
mwi->ua = mem_ref(ua);
routev[0] = ua_outbound(ua);
info("mwi: subscribing to messages for %s\n", ua_aor(ua));
err = sipevent_subscribe(&mwi->sub, uag_sipevent_sock(), ua_aor(ua),
NULL, ua_aor(ua), "message-summary", NULL,
600, ua_cuser(ua),
routev, routev[0] ? 1 : 0,
auth_handler, ua_account(ua), true, NULL,
notify_handler, close_handler, mwi,
"Accept:"
" application/simple-message-summary\r\n");
if (err) {
warning("mwi: subscribe ERROR: %m\n", err);
}
if (err)
mem_deref(mwi);
return err;
}
static struct mwi *mwi_find(const struct ua *ua)
{
struct le *le;
for (le = mwil.head; le; le = le->next) {
struct mwi *mwi = le->data;
if (mwi->ua == ua)
return mwi;
}
return NULL;
}
static void ua_event_handler(struct ua *ua,
enum ua_event ev,
struct call *call,
const char *prm,
void *arg )
{
(void)call;
(void)prm;
(void)arg;
if (ev == UA_EVENT_REGISTER_OK) {
if (!mwi_find(ua))
mwi_subscribe(ua);
}
else if (ev == UA_EVENT_SHUTDOWN) {
struct le *le;
info("mwi: shutdown\n");
le = list_head(&mwil);
while (le) {
struct mwi *mwi = le->data;
le = le->next;
mwi->shutdown = true;
if (mwi->sub) {
mwi->sub = mem_deref(mwi->sub);
tmr_start(&mwi->tmr, 500, deref_handler, mwi);
}
else
mem_deref(mwi);
}
}
}
static void tmr_handler(void *arg)
{
struct le *le;
(void)arg;
for (le = list_head(uag_list()); le; le = le->next) {
struct ua *ua = le->data;
struct account *acc = ua_account(ua);
if (account_regint(acc) == 0) {
mwi_subscribe(ua);
}
}
}
static int module_init(void)
{
list_init(&mwil);
tmr_start(&tmr, 1, tmr_handler, 0);
return uag_event_register(ua_event_handler, NULL);
}
static int module_close(void)
{
uag_event_unregister(ua_event_handler);
tmr_cancel(&tmr);
list_flush(&mwil);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(mwi) = {
"mwi",
"application",
module_init,
module_close,
};
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