GSM MNCC: Make sure to set the MNCC_F_KEYPAD when ACKing DTMF

TS 04.08 has a _mandatory_ KEYPAD FACILITY IE, and unless we set
the MNCC_F_KEYPAD, some phones will (legitimately) reject the
04.08 DTMF KEYPAD_ACK without that IE.

diff --git a/gsm_bs.cpp b/gsm_bs.cpp
index 3fc9a88..3ac5bda 100644 (file)
--- a/gsm_bs.cpp
+++ b/gsm_bs.cpp
@@ -93,6 +93,7 @@ void Pgsm_bs::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
        resp = create_mncc(MNCC_START_DTMF_RSP, p_m_g_callref);
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
        resp = create_mncc(MNCC_START_DTMF_RSP, p_m_g_callref);

+       resp->fields |= MNCC_F_KEYPAD;

        resp->keypad = mncc->keypad;
        send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);
 
        resp->keypad = mncc->keypad;
        send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);