DSCP: Add support to send DSCP Policy Query frame
Add support to send DSCP Policy Query frame using a new control interface command DSCP_QUERY. This includes support for a wildcard DSCP query and a DSCP query with a single Domain Name attribute. Signed-off-by: Veerendranath Jakkam <vjakkam@codeaurora.org>
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4 changed files with 117 additions and 0 deletions
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@ -1154,3 +1154,10 @@ associated AP. wpa_supplicant sends DSCP policy response based on the
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control interface command received from the user is as below:
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DSCP_RESP <[reset]>/<[solicited] [policy_id=1 status=0...]> [more]
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DSCP Query:
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DSCP Policy Query enables a STA to query its associated AP for DSCP
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policies applicable to the STA. Currently, this includes support to send
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a wildcard DSCP query or a DSCP query with a single domain name
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attribute. The command format for the DSCP query command is as follows:
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DSCP_QUERY <wildcard>/<domain_name=<string>>
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@ -11455,6 +11455,35 @@ fail:
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}
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static int wpas_ctrl_iface_send_dscp_query(struct wpa_supplicant *wpa_s,
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const char *cmd)
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{
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char *pos;
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/*
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* format:
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* Wildcard DSCP query
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* <wildcard>
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*
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* DSCP query with a domain name attribute:
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* [domain_name=<string>]
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*/
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if (os_strstr(cmd, "wildcard")) {
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wpa_printf(MSG_DEBUG, "QM: Send wildcard DSCP policy query");
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return wpas_send_dscp_query(wpa_s, NULL, 0);
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}
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pos = os_strstr(cmd, "domain_name=");
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if (!pos || !os_strlen(pos + 12)) {
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wpa_printf(MSG_ERROR, "QM: Domain name not preset");
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return -1;
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}
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return wpas_send_dscp_query(wpa_s, pos + 12, os_strlen(pos + 12));
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}
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char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
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char *buf, size_t *resp_len)
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{
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@ -12386,6 +12415,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
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} else if (os_strncmp(buf, "DSCP_RESP ", 10) == 0) {
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if (wpas_ctrl_iface_send_dscp_resp(wpa_s, buf + 10))
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reply_len = -1;
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} else if (os_strncmp(buf, "DSCP_QUERY ", 11) == 0) {
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if (wpas_ctrl_iface_send_dscp_query(wpa_s, buf + 11))
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reply_len = -1;
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} else {
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os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
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reply_len = 16;
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@ -1159,6 +1159,7 @@ void wpas_dscp_deinit(struct wpa_supplicant *wpa_s)
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wpa_printf(MSG_DEBUG, "QM: Clear all active DSCP policies");
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wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DSCP_POLICY "clear_all");
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wpa_s->dscp_req_dialog_token = 0;
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wpa_s->dscp_query_dialog_token = 0;
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wpa_s->connection_dscp = 0;
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if (wpa_s->wait_for_dscp_req) {
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wpa_s->wait_for_dscp_req = 0;
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@ -1410,3 +1411,77 @@ fail:
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wpabuf_free(buf);
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return ret;
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}
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int wpas_send_dscp_query(struct wpa_supplicant *wpa_s, const char *domain_name,
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size_t domain_name_length)
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{
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struct wpabuf *buf = NULL;
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int ret, dscp_query_size;
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if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_ssid)
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return -1;
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if (!wpa_s->connection_dscp) {
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wpa_printf(MSG_ERROR,
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"QM: Failed to send DSCP query - DSCP capability not enabled for the current association");
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return -1;
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}
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if (wpa_s->wait_for_dscp_req) {
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wpa_printf(MSG_INFO, "QM: Wait until AP sends a DSCP request");
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return -1;
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}
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#define DOMAIN_NAME_OFFSET (4 /* OUI */ + 1 /* Attr Id */ + 1 /* Attr len */)
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if (domain_name_length > 255 - DOMAIN_NAME_OFFSET) {
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wpa_printf(MSG_ERROR, "QM: Too long domain name");
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return -1;
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}
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dscp_query_size = 1 + /* Category */
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4 + /* OUI Type */
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1 + /* OUI subtype */
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1; /* Dialog Token */
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if (domain_name && domain_name_length)
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dscp_query_size += 1 + /* Element ID */
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1 + /* IE Length */
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DOMAIN_NAME_OFFSET + domain_name_length;
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buf = wpabuf_alloc(dscp_query_size);
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if (!buf) {
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wpa_printf(MSG_ERROR, "QM: Failed to allocate DSCP query");
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return -1;
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}
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wpabuf_put_u8(buf, WLAN_ACTION_VENDOR_SPECIFIC_PROTECTED);
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wpabuf_put_be32(buf, QM_ACTION_VENDOR_TYPE);
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wpabuf_put_u8(buf, QM_DSCP_POLICY_QUERY);
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wpa_s->dscp_query_dialog_token++;
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if (wpa_s->dscp_query_dialog_token == 0)
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wpa_s->dscp_query_dialog_token++;
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wpabuf_put_u8(buf, wpa_s->dscp_query_dialog_token);
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if (domain_name && domain_name_length) {
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/* Domain Name attribute */
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wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
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wpabuf_put_u8(buf, DOMAIN_NAME_OFFSET + domain_name_length);
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wpabuf_put_be32(buf, QM_IE_VENDOR_TYPE);
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wpabuf_put_u8(buf, QM_ATTR_DOMAIN_NAME);
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wpabuf_put_u8(buf, domain_name_length);
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wpabuf_put_data(buf, domain_name, domain_name_length);
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}
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#undef DOMAIN_NAME_OFFSET
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ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0);
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if (ret < 0) {
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wpa_dbg(wpa_s, MSG_ERROR, "QM: Failed to send DSCP query");
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wpa_s->dscp_query_dialog_token--;
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}
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wpabuf_free(buf);
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return ret;
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}
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@ -1514,6 +1514,7 @@ struct wpa_supplicant {
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struct dl_list active_scs_ids;
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bool ongoing_scs_req;
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u8 dscp_req_dialog_token;
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u8 dscp_query_dialog_token;
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unsigned int enable_dscp_policy_capa:1;
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unsigned int connection_dscp:1;
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unsigned int wait_for_dscp_req:1;
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@ -1865,6 +1866,8 @@ int wpas_send_dscp_response(struct wpa_supplicant *wpa_s,
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struct dscp_resp_data *resp_data);
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void wpas_handle_assoc_resp_qos_mgmt(struct wpa_supplicant *wpa_s,
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const u8 *ies, size_t ies_len);
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int wpas_send_dscp_query(struct wpa_supplicant *wpa_s, const char *domain_name,
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size_t domain_name_length);
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int wpas_pasn_auth_start(struct wpa_supplicant *wpa_s,
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const u8 *bssid, int akmp, int cipher,
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