WifiHAl: Add error alert support

Bug: 152366765

Test log for beacon lost alert:
01-01 00:11:36.705     8     8 W [08:18:30.889195][dhd][wlan] MACEVENT: WLC_E_LINK DOWN flags:0x0 status:0 reason:1
01-01 00:11:36.736     8     8 W [08:18:30.920297][cfg80211][wlan] wl_notify_connect_status: [wlan0] Mode BSS. event:16 status:0 reason:1
01-01 00:11:36.920     8     8 W         : [08:18:31.103883][dhd][wlan] dhd_os_send_alert_message enter
01-01 00:11:36.943     8     8 W [08:18:31.127500][cfg80211][wlan] wl_cfg80211_alert: In : error alert eventing, reason=0x0
05-22 08:18:31.144  2589  3481 I WifiHAL : Got event: 11
05-22 08:18:31.144  2589  3481 I WifiHAL : Initiating alert callback
05-22 08:18:31.145  2808  3434 W WifiVendorHal: onDebugErrorAlert 0
05-22 08:18:31.333  2808  2888 W WifiDiags: captureAlertData: error  0

Change-Id: I4d2fe39941b791035298bc984d1906b01510d2b6

1 files changed, 26 insertions, 4 deletions

diff --git a/bcmdhd/wifi_hal/wifi_logger.cpp b/bcmdhd/wifi_hal/wifi_logger.cpp
index e4181e4..a47060c 100755
--- a/bcmdhd/wifi_hal/wifi_logger.cpp
+++ b/bcmdhd/wifi_hal/wifi_logger.cpp
@@ -83,7 +83,7 @@ typedef enum {
     LOGGER_ATTRIBUTE_LOG_MIN_DATA_SIZE,
     LOGGER_ATTRIBUTE_FW_DUMP_LEN,
     LOGGER_ATTRIBUTE_FW_DUMP_DATA,
-    // LOGGER_ATTRIBUTE_FW_ERR_CODE,
+    LOGGER_ATTRIBUTE_FW_ERR_CODE,
     LOGGER_ATTRIBUTE_RING_DATA,
     LOGGER_ATTRIBUTE_RING_STATUS,
     LOGGER_ATTRIBUTE_RING_NUM,
@@ -775,7 +775,7 @@ public:
         wifi_ring_buffer_id ring_id;
         char *buffer = NULL;
         int buffer_size = 0;
-
+        bool is_err_alert = false;
 
         nlattr *vendor_data = event.get_attribute(NL80211_ATTR_VENDOR_DATA);
         int len = event.get_vendor_data_len();
@@ -794,15 +794,37 @@ public:
                 } else if (it.get_type() == LOGGER_ATTRIBUTE_RING_DATA) {
                     buffer_size = it.get_len();
                     buffer = (char *)it.get_data();
-            /*
                 } else if (it.get_type() == LOGGER_ATTRIBUTE_FW_ERR_CODE) {
+                    /* Error code is for error alert event only */
                     mErrCode = it.get_u32();
-            */
+                    is_err_alert = true;
                 } else {
                     ALOGW("Ignoring invalid attribute type = %d, size = %d",
                             it.get_type(), it.get_len());
                 }
             }
+
+            if(is_err_alert) {
+                mBuffSize = sizeof(mErrCode);
+                if (mBuff) free(mBuff);
+                mBuff = (char *)malloc(mBuffSize);
+                if (!mBuff) {
+                  ALOGE("Buffer allocation failed");
+                  return NL_SKIP;
+                }
+                memcpy(mBuff, (char *)&mErrCode, mBuffSize);
+                ALOGI("Initiating alert callback");
+                if (mHandler.on_alert) {
+                  (*mHandler.on_alert)(id(), mBuff, mBuffSize, mErrCode);
+                }
+                if (mBuff) {
+                  free(mBuff);
+                  mBuff = NULL;
+                }
+                mBuffSize = 0;
+                return NL_OK;
+            }
+
             if (mBuffSize) {
                 ALOGD("dump size: %d meta data size: %d", mBuffSize, buffer_size);
                 if (mBuff) free(mBuff);