Question

环境：

的Linux
BlueZ蓝牙堆栈
C API
不使用dbus接口

我必须说HCI BlueZ C API（hci_lib.h）的文档记录很少，有这样的说法，是否有一个C hci_ * API控制主机可发现状态？类似于＆＃34; hci_write_simple_pairing_mode＆＃34;能否控制可发现性？

Answer 1

以下hci命令使适配器可被发现 hciconfig hci0 piscan

以下是来自hciconfig的相应代码

if (!strcmp(opt, "pscan"))
    dr.dev_opt = SCAN_PAGE;
else if (!strcmp(opt, "piscan"))
     dr.dev_opt = SCAN_PAGE | SCAN_INQUIRY;
if (ioctl(ctl, HCISETSCAN, (unsigned long) &dr) < 0) {

这里的ctl来自：

 if ((ctl = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI)) < 0)

Answer 2

解决方案可以在hciconfig.c处找到具体的＆lt; cmd_scan＆＃39;实施（有opt =＆＃34; piscan＆＃34;），推导出

    HRESULT BluZbridge::SetDiscoverable(IN BOOL bVisible) {
        if (0 == m_fdHCI)
            return HRESULT_FROM_WIN32(ERROR_NOT_READY);
        hci_dev_req req = { DEFAULT_HCI_ADAPTER_ID, ((TRUE == bVisible) ? (SCAN_PAGE | SCAN_INQUIRY) : SCAN_DISABLED) };
        if (ioctl(m_fdHCI, HCISETSCAN, (unsigned long)&req) < 0) {
            perror("Can't set scan mode on hci0");
            return HRESULT_GET_ERRNO();
        }
        return S_OK;
    }

BlueZ hci_ * API使主机可被发现

2 个答案: