wifi 移植过程

int wifi_connect_on_socket_path(const char *path)
{
    char supp_status[PROPERTY_VALUE_MAX] = {''};

    /* Make sure supplicant is running */
    if (!property_get(supplicant_prop_name, supp_status, NULL)
            || strcmp(supp_status, "running") != 0) {
        ALOGE("Supplicant not running, cannot connect");
        return -1;
    }

    ctrl_conn = wpa_ctrl_open(path);
    if (ctrl_conn == NULL) {
        ALOGE("Unable to open connection to supplicant on "%s": %s",
             path, strerror(errno));
        return -1;
    }
    monitor_conn = wpa_ctrl_open(path);
    if (monitor_conn == NULL) {
        wpa_ctrl_close(ctrl_conn);
        ctrl_conn = NULL;
        return -1;
    }
    if (wpa_ctrl_attach(monitor_conn) != 0) {
        wpa_ctrl_close(monitor_conn);
        wpa_ctrl_close(ctrl_conn);
        ctrl_conn = monitor_conn = NULL;
        return -1;
    }

    if (socketpair(AF_UNIX, SOCK_STREAM, 0, exit_sockets) == -1) {
        wpa_ctrl_close(monitor_conn);
        wpa_ctrl_close(ctrl_conn);
        ctrl_conn = monitor_conn = NULL;
        return -1;
    }

    return 0;
}

/* Establishes the control and monitor socket connections on the interface */
int wifi_connect_to_supplicant()
{
    static char path[PATH_MAX];

    if (access(IFACE_DIR, F_OK) == 0) {
        snprintf(path, sizeof(path), "%s/%s", IFACE_DIR, primary_iface);//primary_iface = wlan0
    } else {
        snprintf(path, sizeof(path), "@android:wpa_%s", primary_iface);
    }
    return wifi_connect_on_socket_path(path);
}

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