Hello,

As mobile applications based on kamailio are growing exponentially on Play Store and App Store, i would suggest if you could add by default the code for ios/android push notifications.

I have problems mainly for incoming call (phone wakeup) on linphone iphone app, as kamailio is missing the push solution. On Android i am using Baresip and works perfect without push.

Navigating on the web, i found some uncomplete or minimum tutorials to implement this.
Like: https://denys-pozniak.medium.com/apple-push-notification-with-kamailio-eeca2f8e08d

And also some code snippets of a modification of "kamailio.cfg" to add support for ios push notifications. (see below).
Could someone have this already working? Or kamailio official developers could add this by default inside source code?

`# keep a record of an IPhone for 4 hours
modparam("htable", "htable", "iphone_remote=>size=10;autoexpire=14400;")
modparam("htable", "htable", "iphone_voip=>size=10;autoexpire=14400;")
modparam("htable", "htable", "iphone_check=>size=10;autoexpire=14400;")
modparam("htable", "htable", "vtp=>size=10;autoexpire=120;")

route[REGISTRAR] {

...

...

    if (save("location")) {

        # user registered, now look at the useragent header for iPhone string
        if ($hdr(User-Agent)=~"LinphoneiOS.*") {


            $var(uri) = @contact.uri;                               # select the uri from contact header
            $var(pn-prid) = $(var(uri){uri.param,pn-prid});         # get the uri param pn-prid from the uri, i.e. 1DF26BC10F597676B
            xlog("!!!! - $var(pn-prid)");
            $var(i) = 0;
            $var(n) = $(var(pn-prid){s.count,&});

            while( $var(i) <= $var(n)) {
                $var(pn-prid_item) = $(var(pn-prid){s.select,$var(i),&});
                $var(pn-prid_type) = $(var(pn-prid_item){s.select,1,:});
                $var(pn-prid_token) = $(var(pn-prid_item){s.select,0,:});

                if ( $var(pn-prid_type) == "remote" ) {
                    $var(pn-prid_remote) = $(var(pn-prid_item){s.select,0,:}) ;
                }
                if ( $var(pn-prid_type) == "voip" ) {
                    $var(pn-prid_voip) = $(var(pn-prid_item){s.select,0,:}) ;
                }
                $var(i) = $var(i) + 1;
            }

            xlog("L_INFO","iPhone PUSH tokens for user $fU - remote: $var(pn-prid_remote), voip: $var(pn-prid_voip)");

            # store the values of tokens to htable with fromUser as key
            $sht(iphone_remote=>$fU) = $var(pn-prid_remote);
            $sht(iphone_voip=>$fU) = $var(pn-prid_voip);
            $sht(iphone_check=>$fU) = 1;

            if ( $sht(vtp=>id_index::$tU) != $null ) {
                xlog("L_INFO", "New $rm ru=$ru tu=$tu \n");
                route(JOIN);
            }

        } else {
            # no iphone
            $sht(iphone_check=>$fU) = 0;
        }

...

...

}

route[LOCATION] {

...

...

    if (!lookup("location")) {
        $var(rc) = $rc;

        # handle PUSH notifications for iPhone
        # iphones should not be registered and contacts stored in database
        # hence lookup should fail and we need to try to push iphone first
        if ($sht(iphone_check=>$tU) == 1) {
            xlog("L_ERR", "[PUSH] The to user has already used iPhone, trying push notifications");
            xlog("L_ERR", "[PUSH] No registration to try, suspending.");
            sl_send_reply("100", "Suspending");
            route(SUSPEND);
            route(RELAY);
            exit;
        }

...

...

    if (is_method("INVITE")) {
        setflag(FLT_ACCMISSED);

        # handle PUSH notifications for iPhone
        # in some cases, iphone does not send de-register when going to background
        # for these circumstances, push iphone even if it has an active registration
        if ($sht(iphone_check=>$tU) == 1) {
            xlog("L_ERR", "[PUSH] The to user has already used iPhone, trying push notifications");
            xlog("L_ERR", "[PUSH] No registration to try, suspending.");
            sl_send_reply("100", "Suspending");
            route(SUSPEND);
        }

    }
    route(RELAY);
    exit;

}

route[SUSPEND] {
if ( !t_suspend() ) {
xlog("L_ERROR","[SUSPEND] failed suspending trasaction [$T(id_index):$T(id_label)]\n");
send_reply("501", "Suspending error");
exit;
} else {
xlog("L_INFO","[SUSPEND] suspended transaction [$T(id_index):$T(id_label)] $fU=> $rU\n");
$sht(vtp=>id_index::$rU) = $T(id_index);
$sht(vtp=>id_label::$rU) = $T(id_label);
xlog("L_INFO","[SUSPEND] htable key value [$sht(vtp=>id_index::$rU) -- $sht(vtp=>id_label::$rU)]\n");
route(SENDPUSH);
exit;
}
}

route[SENDPUSH] {
#http_client_query("http://url/push.php"http://url/push.php, "user=$rU\r\npn-tok=$sht(tokens=>$rU)\r\n","Content-Type: text/plain", "$var(result)");
xlog("!!!!!!!!!!!!!!!!!!!!!! PUSH !!!!!!!!!!!!!!!!!!!");
xlog("/opt/push/push.sh $ci $sht(iphone_voip=>$tU)");
exec_avp("/opt/push/push.sh $ci $sht(iphone_voip=>$tU)");
xlog("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
sl_send_reply("100", "Pushing");
}

route[JOIN] {
xlog("L_WARN","[JOIN] htable key value [$sht(vtp=>id_index::$tU) -- $sht(vtp=>id_label::$tU)]\n");
t_continue("$sht(vtp=>id_index::$tU)", "$sht(vtp=>id_label::$tU)", "RESUME");
$sht(vtp=>joined::$tU) = 1;
}

route[RESUME] {
lookup("location");
xlog("L_INFO","[RESUME] rm=$rm ru=$ru du=$du \n");
t_relay();
$sht(vtp=>id_index::$tU) = $null;
$sht(vtp=>id_label::$tU) = $null;
exit; }
`

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