---
 src/stk.c |  136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 135 insertions(+), 1 deletions(-)

diff --git a/src/stk.c b/src/stk.c
index 3fda2af..76ffdf5 100644
--- a/src/stk.c
+++ b/src/stk.c
@@ -1590,6 +1590,137 @@ static gboolean handle_command_set_up_call(const struct 
stk_command *cmd,
        return FALSE;
 }
 
+static void send_ussd_callback(int error, int dcs, const unsigned char *msg,
+                               int msg_len, void *userdata)
+{
+       struct ofono_stk *stk = userdata;
+       struct ofono_error failure = { .type = OFONO_ERROR_TYPE_FAILURE };
+       struct stk_response rsp;
+       enum sms_charset charset;
+       
+       if (stk->pending_cmd->send_ussd.alpha_id &&
+                       stk->pending_cmd->send_ussd.alpha_id[0])
+               stk_alpha_id_unset(stk);
+
+       switch (error) {
+       case OFONO_USSD_FAILURE_NONE:
+               if (cbs_dcs_decode(dcs, NULL, NULL, &charset,
+                                       NULL, NULL, NULL)) {
+                       if (charset == SMS_CHARSET_7BIT)
+                               rsp.send_ussd.text.dcs = 0x00;
+                       else if (charset == SMS_CHARSET_8BIT)
+                               rsp.send_ussd.text.dcs = 0x04;
+                       else if (charset == SMS_CHARSET_UCS2)
+                               rsp.send_ussd.text.dcs = 0x08;
+               } else {
+                       send_simple_response(stk,
+                                       STK_RESULT_TYPE_USSD_RETURN_ERROR);
+                       return;
+               }
+
+               memset(&rsp, 0, sizeof(rsp));
+
+               rsp.result.type = STK_RESULT_TYPE_SUCCESS;
+               rsp.send_ussd.text.text = msg;
+               rsp.send_ussd.text.len = msg_len;
+
+               if (stk_respond(stk, &rsp, stk_command_cb))
+                       stk_command_cb(&failure, stk);
+
+               break;
+       case OFONO_USSD_FAILURE_USER_TERMINATED:
+               send_simple_response(stk, 
+                               STK_RESULT_TYPE_USSD_OR_SS_USER_TERMINATION);
+               break;
+       case OFONO_USSD_FAILURE_TIMED_OUT:
+               send_simple_response(stk, STK_RESULT_TYPE_NETWORK_UNAVAILABLE);
+               break;
+       case OFONO_USSD_FAILURE_RETURN_ERROR:
+               send_simple_response(stk, STK_RESULT_TYPE_USSD_RETURN_ERROR);
+               break;
+       }
+}
+
+static gboolean handle_command_send_ussd(const struct stk_command *cmd,
+                                       struct stk_response *rsp,
+                                       struct ofono_stk *stk)
+{
+       struct ofono_modem *modem = __ofono_atom_get_modem(stk->atom);
+       static unsigned char busy_on_ss_result[] = { 0x03 };
+       static unsigned char busy_on_ussd_result[] = { 0x08 };
+       struct ofono_atom *atom;
+       struct ofono_ussd *ussd;
+       int err;
+
+       atom = __ofono_modem_find_atom(modem, OFONO_ATOM_TYPE_CALL_FORWARDING);
+       if (atom && __ofono_atom_get_registered(atom)) {
+               struct ofono_call_forwarding *cf = __ofono_atom_get_data(atom);
+               
+               if (__ofono_call_forwarding_is_busy(cf)) {
+                       rsp->result.type = STK_RESULT_TYPE_TERMINAL_BUSY;
+                       rsp->result.additional_len = sizeof(busy_on_ss_result);
+                       rsp->result.additional = busy_on_ss_result;
+                       return TRUE;
+               }
+       }
+
+       atom = __ofono_modem_find_atom(modem, OFONO_ATOM_TYPE_CALL_BARRING);
+       if (atom && __ofono_atom_get_registered(atom)) {
+               struct ofono_call_barring *cb = __ofono_atom_get_data(atom);
+
+               if (__ofono_call_barring_is_busy(cb)) {
+                       rsp->result.type = STK_RESULT_TYPE_TERMINAL_BUSY;
+                       rsp->result.additional_len = sizeof(busy_on_ss_result);
+                       rsp->result.additional = busy_on_ss_result;
+                       return TRUE;
+               }
+       }
+
+       atom = __ofono_modem_find_atom(modem, OFONO_ATOM_TYPE_CALL_SETTINGS);
+       if (atom && __ofono_atom_get_registered(atom)) {
+               struct ofono_call_settings *cs = __ofono_atom_get_data(atom);
+               
+               if (__ofono_call_settings_is_busy(cs)) {
+                       rsp->result.type = STK_RESULT_TYPE_TERMINAL_BUSY;
+                       rsp->result.additional_len = sizeof(busy_on_ss_result);
+                       rsp->result.additional = busy_on_ss_result;
+                       return TRUE;
+               }
+       }
+
+       atom = __ofono_modem_find_atom(modem, OFONO_ATOM_TYPE_USSD);
+       if (!atom || !__ofono_atom_get_registered(atom)) {
+               rsp->result.type = STK_RESULT_TYPE_NOT_CAPABLE;
+               return TRUE;
+       }
+
+       ussd = __ofono_atom_get_data(atom);
+       if (__ofono_ussd_is_busy(ussd)) {
+               rsp->result.type = STK_RESULT_TYPE_TERMINAL_BUSY;
+               rsp->result.additional_len = sizeof(busy_on_ussd_result);
+               rsp->result.additional = busy_on_ussd_result;
+               return TRUE;
+       }
+
+       err = __ofono_ussd_initiate(ussd, cmd->send_ussd.ussd_string.dcs,
+                                       cmd->send_ussd.ussd_string.string,
+                                       cmd->send_ussd.ussd_string.len,
+                                       send_ussd_callback, stk);
+
+       if (err >= 0) 
+               return FALSE;
+
+       if (err == -ENOSYS) {
+               rsp->result.type = STK_RESULT_TYPE_NOT_CAPABLE;
+               return TRUE;
+       }
+
+       if (cmd->send_ussd.alpha_id && cmd->send_ussd.alpha_id[0])
+               stk_alpha_id_set(stk, cmd->send_ussd.alpha_id);
+
+       return FALSE;
+}
+
 static void stk_proactive_command_cancel(struct ofono_stk *stk)
 {
        if (stk->immediate_response)
@@ -1740,7 +1871,10 @@ void ofono_stk_proactive_command_notify(struct ofono_stk 
*stk,
                respond = handle_command_set_up_call(stk->pending_cmd,
                                                        &rsp, stk);
                break;
-
+       case STK_COMMAND_TYPE_SEND_USSD:
+               respond = handle_command_send_ussd(stk->pending_cmd,
+                                                       &rsp, stk);
+               break;
        default:
                rsp.result.type = STK_RESULT_TYPE_COMMAND_NOT_UNDERSTOOD;
                break;
-- 
1.7.0.4

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