OpenHarmony轻量系统开发【9】WiFi之STA模式连接热点 原创 精华

static_library("demo_wifi_sta") {
    sources = [
        "demo_wifi_sta.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/components/cmsis/2.0",
        "//base/iot_hardware/peripheral/interfaces/kits",
        "//device/soc/hisilicon/hi3861v100/hi3861_adapter/hals/communication/wifi_lite/wifiservice",
        "//device/soc/hisilicon/hi3861v100/hi3861_adapter/kal",
        "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/lwip_sack/include",
    ]
}

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int hi_wifi_start_sta(void)
{
    int ret;
    char ifname[WIFI_IFNAME_MAX_SIZE + 1] = {0};
    int len = sizeof(ifname);
    const unsigned char wifi_vap_res_num = APP_INIT_VAP_NUM;
    const unsigned char wifi_user_res_num = APP_INIT_USR_NUM;
    unsigned int  num = WIFI_SCAN_AP_LIMIT;

    //这里不需要重复进行WiFi init，因为系统启动后就自己会做WiFi init
#if 0
    printf("_______>>>>>>>>>> %s %d \r\n", __FILE__, __LINE__);
    ret = hi_wifi_init(wifi_vap_res_num, wifi_user_res_num);
    if (ret != HISI_OK) {
        return -1;
    }
#endif
    ret = hi_wifi_sta_start(ifname, &len);
    if (ret != HISI_OK) {
        return -1;
    }

    /* register call back function to receive wifi event, etc scan results event,
     * connected event, disconnected event.
     */
    ret = hi_wifi_register_event_callback(wifi_wpa_event_cb);
    if (ret != HISI_OK) {
        printf("register wifi event callback failed\n");
    }

    /* acquire netif for IP operation */
    g_lwip_netif = netifapi_netif_find(ifname);
    if (g_lwip_netif == NULL) {
        printf("%s: get netif failed\n", __FUNCTION__);
        return -1;
    }

    /* 开始扫描附件的WiFi热点 */
    ret = hi_wifi_sta_scan();
    if (ret != HISI_OK) {
        return -1;
    }

    sleep(5);   /* sleep 5s, waiting for scan result. */

    hi_wifi_ap_info *pst_results = malloc(sizeof(hi_wifi_ap_info) * WIFI_SCAN_AP_LIMIT);
    if (pst_results == NULL) {
        return -1;
    }

    //把扫描到的热点结果存储起来
    ret = hi_wifi_sta_scan_results(pst_results, &num);
    if (ret != HISI_OK) {
        free(pst_results);
        return -1;
    }

    //打印扫描到的所有热点
    for (unsigned int loop = 0; (loop < num) && (loop < WIFI_SCAN_AP_LIMIT); loop++) {
        printf("SSID: %s\n", pst_results[loop].ssid);
    }
    free(pst_results);

    /* 开始接入热点 */
    ret = hi_wifi_start_connect();
    if (ret != 0) {
        return -1;
    }
    return 0;
}
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int hi_wifi_start_connect(void)
{
    int ret;
    errno_t rc;
    hi_wifi_assoc_request assoc_req = {0};

    /* copy SSID to assoc_req */
    rc = memcpy_s(assoc_req.ssid, HI_WIFI_MAX_SSID_LEN + 1, "RedmiK40", 8); /* 9:ssid length */
    if (rc != EOK) {
        return -1;
    }

    //热点加密方式
    assoc_req.auth = HI_WIFI_SECURITY_WPA2PSK;

    /* 热点密码 */
    memcpy(assoc_req.key, "07686582488", 11);

    ret = hi_wifi_sta_connect(&assoc_req);
    if (ret != HISI_OK) {
        return -1;
    }

    return 0;
}
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void wifi_wpa_event_cb(const hi_wifi_event *hisi_event)
{
    if (hisi_event == NULL)
        return;

    switch (hisi_event->event) {
        case HI_WIFI_EVT_SCAN_DONE:
            printf("WiFi: Scan results available\n");
            break;
        case HI_WIFI_EVT_CONNECTED:
            printf("WiFi: Connected\n");
            netifapi_dhcp_start(g_lwip_netif);
            break;
        case HI_WIFI_EVT_DISCONNECTED:
            printf("WiFi: Disconnected\n");
            netifapi_dhcp_stop(g_lwip_netif);
            hi_sta_reset_addr(g_lwip_netif);
            break;
        case HI_WIFI_EVT_WPS_TIMEOUT:
            printf("WiFi: wps is timeout\n");
            break;
        default:
            break;
    }
}
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/* clear netif's ip, gateway and netmask */
void hi_sta_reset_addr(struct netif *pst_lwip_netif)
{
    ip4_addr_t st_gw;
    ip4_addr_t st_ipaddr;
    ip4_addr_t st_netmask;

    if (pst_lwip_netif == NULL) {
        printf("hisi_reset_addr::Null param of netdev\r\n");
        return;
    }

    IP4_ADDR(&st_gw, 0, 0, 0, 0);
    IP4_ADDR(&st_ipaddr, 0, 0, 0, 0);
    IP4_ADDR(&st_netmask, 0, 0, 0, 0);

    netifapi_netif_set_addr(pst_lwip_netif, &st_ipaddr, &st_netmask, &st_gw);
}
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typedef struct {
    char ssid[HI_WIFI_MAX_SSID_LEN + 1];    /**< SSID. CNcomment: SSID 只支持ASCII字符.CNend */
    hi_wifi_auth_mode auth;                 /**< Authentication mode. CNcomment: 认证类型.CNend */
    char key[HI_WIFI_MAX_KEY_LEN + 1];      /**< Secret key. CNcomment: 秘钥.CNend */
    unsigned char bssid[HI_WIFI_MAC_LEN];   /**< BSSID. CNcomment: BSSID.CNend */
    hi_wifi_pairwise pairwise;              /**< Encryption type. CNcomment: 加密方式,不需指定时置0.CNend */
} hi_wifi_assoc_request;
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int hi_wifi_start_connect(void)
{
    int ret;
    errno_t rc;
    hi_wifi_assoc_request assoc_req = {0};

    /* copy SSID to assoc_req */
    rc = memcpy_s(assoc_req.ssid, HI_WIFI_MAX_SSID_LEN + 1, "RedmiK40", 8); /* 9:ssid length */
    if (rc != EOK) {
        return -1;
    }

    //热点加密方式
    assoc_req.auth = HI_WIFI_SECURITY_WPA2PSK;

    /* 热点密码 */
    memcpy(assoc_req.key, "07686582488", 11);

    ret = hi_wifi_sta_connect(&assoc_req);
    if (ret != HISI_OK) {
        return -1;
    }

    return 0;
}
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