test-modem-helpers-qmi: new unit tests to check the 'current-capabilities' logic

Based on Dan's tests with QMI modems.

1 files changed, 71 insertions, 0 deletions

diff --git a/src/mm-modem-helpers-qmi.c b/src/mm-modem-helpers-qmi.c
index 7de04347..3331de6a 100644
--- a/src/mm-modem-helpers-qmi.c
+++ b/src/mm-modem-helpers-qmi.c
@@ -1145,3 +1145,74 @@ mm_bearer_allowed_auth_to_qmi_authentication (MMBearerAllowedAuth auth)
 
     return out;
 }
+
+/*****************************************************************************/
+
+MMModemCapability
+mm_modem_capability_from_qmi_capabilities_context (MMQmiCapabilitiesContext *ctx)
+{
+    MMModemCapability tmp = MM_MODEM_CAPABILITY_NONE;
+    gchar *nas_ssp_mode_preference_str;
+    gchar *nas_ssp_band_preference_str;
+    gchar *nas_ssp_lte_band_preference_str;
+    gchar *nas_tp_str;
+    gchar *dms_capabilities_str;
+    gchar *tmp_str;
+
+    /* SSP logic to gather capabilities uses the Mode Preference TLV if available,
+     * and if not available it falls back to using Band Preference TLVs */
+    if (ctx->nas_ssp_mode_preference_mask)
+        tmp = mm_modem_capability_from_qmi_rat_mode_preference (ctx->nas_ssp_mode_preference_mask);
+    else if (ctx->nas_ssp_band_preference_mask) {
+        tmp = mm_modem_capability_from_qmi_band_preference (ctx->nas_ssp_band_preference_mask);
+        /* Just the presence of the LTE band preference tells us it's LTE */
+        if (ctx->nas_ssp_lte_band_preference_mask)
+            tmp |= MM_MODEM_CAPABILITY_LTE;
+    }
+
+    /* If no value retrieved from SSP, check TP. We only process TP
+     * values if not 'auto'. */
+    if (   tmp == MM_MODEM_CAPABILITY_NONE
+        && ctx->nas_tp_mask
+        && ctx->nas_tp_mask != QMI_NAS_RADIO_TECHNOLOGY_PREFERENCE_AUTO)
+        tmp = mm_modem_capability_from_qmi_radio_technology_preference (ctx->nas_tp_mask);
+
+    /* Final capabilities are the intersection between the Technology
+     * Preference or SSP and the device's capabilities.
+     * If the Technology Preference was "auto" or unknown we just fall back
+     * to the Get Capabilities response.
+     */
+    if (tmp == MM_MODEM_CAPABILITY_NONE)
+        tmp = ctx->dms_capabilities;
+    else
+        tmp &= ctx->dms_capabilities;
+
+
+    /* Log about the logic applied */
+    nas_ssp_mode_preference_str = qmi_nas_rat_mode_preference_build_string_from_mask (ctx->nas_ssp_mode_preference_mask);
+    nas_ssp_band_preference_str = qmi_nas_band_preference_build_string_from_mask (ctx->nas_ssp_band_preference_mask);
+    nas_ssp_lte_band_preference_str = qmi_nas_lte_band_preference_build_string_from_mask (ctx->nas_ssp_band_preference_mask);
+    nas_tp_str = qmi_nas_radio_technology_preference_build_string_from_mask (ctx->nas_tp_mask);
+    dms_capabilities_str = mm_modem_capability_build_string_from_mask (ctx->dms_capabilities);
+    tmp_str = mm_modem_capability_build_string_from_mask (tmp);
+    mm_dbg ("Current capabilities built: '%s'\n"
+            "  SSP mode preference: '%s'\n"
+            "  SSP band preference: '%s'\n"
+            "  SSP LTE band preference: '%s'\n"
+            "  TP: '%s'\n"
+            "  DMS Capabilities: '%s'",
+            tmp_str,
+            nas_ssp_mode_preference_str ? nas_ssp_mode_preference_str : "unknown",
+            nas_ssp_band_preference_str ? nas_ssp_band_preference_str : "unknown",
+            nas_ssp_lte_band_preference_str ? nas_ssp_lte_band_preference_str : "unknown",
+            nas_tp_str ? nas_tp_str : "unknown",
+            dms_capabilities_str);
+    g_free (nas_ssp_mode_preference_str);
+    g_free (nas_ssp_band_preference_str);
+    g_free (nas_ssp_lte_band_preference_str);
+    g_free (nas_tp_str);
+    g_free (dms_capabilities_str);
+    g_free (tmp_str);
+
+    return tmp;
+}