[kamailio/kamailio] WARNING: <script>: No transaction found for CANCEL - 54-261285 (Issue #4060) - sr-dev

6 Dec 2024

if (is_method("CANCEL")) {
    xlog("L_INFO", "Received CANCEL request for $ci - Method: $rm - R-URI:
$ru\n");
    
    if (!t_check_trans()) {
        xlog("L_INFO", "No transaction found with t_check_trans(), trying
t_lookup_cancel()\n");
        # Try to find the transaction using branch and Call-ID
        $var(branch) = $(hdr(Via){param.value,branch});
        if (!t_lookup_cancel()) {
            xlog("L_WARN", "No transaction found for CANCEL - $ci with
branch $var(branch)\n");
            sl_reply("481", "Call Leg/Transaction Does Not Exist");
            exit;
        }
        xlog("L_INFO", "Found transaction using
t_lookup_cancel()\n");
    }

    # Extract destination from original request
    if ($ru != "") {
        $du = $ru;
        xlog("L_INFO", "Setting destination from R-URI: $du\n");
    } else {
        xlog("L_WARN", "No R-URI found for CANCEL\n");
    }
    
    # Add debugging
    xlog("L_INFO", "Forwarding CANCEL to $du for call $ci\n");
    
    if (ds_is_from_list()) {
        ds_load_unset();
        xlog("L_INFO", "Unset dispatcher load for destination\n");
    }

    # Handle the client ID and call counting
    if (is_present_hf("X-VICIdial-Client-Id")) {
        $var(client_id) = $(hdr(X-VICIdial-Client-Id));
        if ($var(client_id) =~ "^(CID_[0-9]+)-[a-z]$") {
            $var(parent_id) = $(var(client_id){re.subst,/^(CID_[0-9]+)-[a-z]$/\1/});
        } else {
            $var(parent_id) = $var(client_id);
        }

        if($var(parent_id) != $null) {
            lock("calls_$var(parent_id)");
            if($sht(clientCalls=>$var(parent_id)) > 0) {
                $sht(clientCalls=>$var(parent_id)) =
$sht(clientCalls=>$var(parent_id)) - 1;
                xlog("L_INFO", "CANCEL: Decremented call count for
$var(parent_id) to $sht(clientCalls=>$var(parent_id))\n");
            }
            unlock("calls_$var(parent_id)");
        }
    }

    # Send 200 OK response for the CANCEL
    t_reply("200", "OK");
    
    # Force the relay of CANCEL to the destination
    t_relay();
    exit;
}   "This is my cancel route. It either forwards or relays the cancel message to the
destination and also provides an error."


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