wmm.c revision cce06667447b5aec83452adb0c15100ada531095
18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * hostapd / WMM (Wi-Fi Multimedia) 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright 2002-2003, Instant802 Networks, Inc. 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright 2005-2006, Devicescape Software, Inc. 58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2009, Jouni Malinen <j@w1.fi> 68d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This program is free software; you can redistribute it and/or modify 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * it under the terms of the GNU General Public License version 2 as 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * published by the Free Software Foundation. 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Alternatively, this software may be distributed under the terms of BSD 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * license. 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * See README and COPYING for more details. 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "utils/includes.h" 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "utils/common.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common/ieee802_11_defs.h" 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common/ieee802_11_common.h" 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "hostapd.h" 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "ieee802_11.h" 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "sta_info.h" 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "ap_config.h" 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "ap_drv_ops.h" 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wmm.h" 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* TODO: maintain separate sequence and fragment numbers for each AC 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * TODO: IGMP snooping to track which multicasts to forward - and use QOS-DATA 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * if only WMM stations are receiving a certain group */ 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic inline u8 wmm_aci_aifsn(int aifsn, int acm, int aci) 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 ret; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = (aifsn << WMM_AC_AIFNS_SHIFT) & WMM_AC_AIFSN_MASK; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (acm) 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret |= WMM_AC_ACM; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret |= (aci << WMM_AC_ACI_SHIFT) & WMM_AC_ACI_MASK; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic inline u8 wmm_ecw(int ecwmin, int ecwmax) 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ((ecwmin << WMM_AC_ECWMIN_SHIFT) & WMM_AC_ECWMIN_MASK) | 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((ecwmax << WMM_AC_ECWMAX_SHIFT) & WMM_AC_ECWMAX_MASK); 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Add WMM Parameter Element to Beacon, Probe Response, and (Re)Association 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Response frames. 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtu8 * hostapd_eid_wmm(struct hostapd_data *hapd, u8 *eid) 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *pos = eid; 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wmm_parameter_element *wmm = 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (struct wmm_parameter_element *) (pos + 2); 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int e; 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!hapd->conf->wmm_enabled) 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eid; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eid[0] = WLAN_EID_VENDOR_SPECIFIC; 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui[0] = 0x00; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui[1] = 0x50; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui[2] = 0xf2; 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui_type = WMM_OUI_TYPE; 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui_subtype = WMM_OUI_SUBTYPE_PARAMETER_ELEMENT; 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->version = WMM_VERSION; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->qos_info = hapd->parameter_set_count & 0xf; 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 751f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt if (hapd->conf->wmm_uapsd && 761f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_UAPSD)) 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->qos_info |= 0x80; 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->reserved = 0; 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* fill in a parameter set record for each AC */ 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (e = 0; e < 4; e++) { 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wmm_ac_parameter *ac = &wmm->ac[e]; 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct hostapd_wmm_ac_params *acp = 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &hapd->iconf->wmm_ac_params[e]; 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ac->aci_aifsn = wmm_aci_aifsn(acp->aifs, 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt acp->admission_control_mandatory, 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt e); 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ac->cw = wmm_ecw(acp->cwmin, acp->cwmax); 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ac->txop_limit = host_to_le16(acp->txop_limit); 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = (u8 *) (wmm + 1); 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eid[1] = pos - eid - 2; /* element length */ 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return pos; 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1011f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt/* 1021f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * This function is called when a station sends an association request with 1031f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * WMM info element. The function returns 1 on success or 0 on any error in WMM 1041f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * element. eid does not include Element ID and Length octets. 1051f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt */ 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint hostapd_eid_wmm_valid(struct hostapd_data *hapd, const u8 *eid, size_t len) 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wmm_information_element *wmm; 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump(MSG_MSGDUMP, "WMM IE", eid, len); 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (len < sizeof(struct wmm_information_element)) { 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Too short WMM IE (len=%lu)", 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (unsigned long) len); 1151f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt return 0; 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm = (struct wmm_information_element *) eid; 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Validating WMM IE: OUI %02x:%02x:%02x " 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "OUI type %d OUI sub-type %d version %d QoS info 0x%x", 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui[0], wmm->oui[1], wmm->oui[2], wmm->oui_type, 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->oui_subtype, wmm->version, wmm->qos_info); 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wmm->oui_subtype != WMM_OUI_SUBTYPE_INFORMATION_ELEMENT || 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm->version != WMM_VERSION) { 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Unsupported WMM IE Subtype/Version"); 1261f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt return 0; 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1291f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt return 1; 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void wmm_send_action(struct hostapd_data *hapd, const u8 *addr, 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wmm_tspec_element *tspec, 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 action_code, u8 dialogue_token, u8 status_code) 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 buf[256]; 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee80211_mgmt *m = (struct ieee80211_mgmt *) buf; 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wmm_tspec_element *t = (struct wmm_tspec_element *) 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->u.action.u.wmm_action.variable; 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int len; 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211, 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HOSTAPD_LEVEL_DEBUG, 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "action response - reason %d", status_code); 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(buf, 0, sizeof(buf)); 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt WLAN_FC_STYPE_ACTION); 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(m->da, addr, ETH_ALEN); 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->u.action.category = WLAN_ACTION_WMM; 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->u.action.u.wmm_action.action_code = action_code; 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->u.action.u.wmm_action.dialog_token = dialogue_token; 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt m->u.action.u.wmm_action.status_code = status_code; 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(t, tspec, sizeof(struct wmm_tspec_element)); 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = ((u8 *) (t + 1)) - buf; 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1591f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt if (hostapd_drv_send_mlme(hapd, m, len, 0) < 0) 160cce06667447b5aec83452adb0c15100ada531095Dmitry Shmidt wpa_printf(MSG_INFO, "wmm_send_action: send failed"); 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint wmm_process_tspec(struct wmm_tspec_element *tspec) 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int medium_time, pps, duration; 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int up, psb, dir, tid; 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 val, surplus; 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt up = (tspec->ts_info[1] >> 3) & 0x07; 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt psb = (tspec->ts_info[1] >> 2) & 0x01; 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dir = (tspec->ts_info[0] >> 5) & 0x03; 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt tid = (tspec->ts_info[0] >> 1) & 0x0f; 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: TS Info: UP=%d PSB=%d Direction=%d TID=%d", 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt up, psb, dir, tid); 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val = le_to_host16(tspec->nominal_msdu_size); 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Nominal MSDU Size: %d%s", 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val & 0x7fff, val & 0x8000 ? " (fixed)" : ""); 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Mean Data Rate: %u bps", 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt le_to_host32(tspec->mean_data_rate)); 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Minimum PHY Rate: %u bps", 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt le_to_host32(tspec->minimum_phy_rate)); 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val = le_to_host16(tspec->surplus_bandwidth_allowance); 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Surplus Bandwidth Allowance: %u.%04u", 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val >> 13, 10000 * (val & 0x1fff) / 0x2000); 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val = le_to_host16(tspec->nominal_msdu_size); 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (val == 0) { 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Invalid Nominal MSDU Size (0)"); 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WMM_ADDTS_STATUS_INVALID_PARAMETERS; 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* pps = Ceiling((Mean Data Rate / 8) / Nominal MSDU Size) */ 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pps = ((le_to_host32(tspec->mean_data_rate) / 8) + val - 1) / val; 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Packets-per-second estimate for TSPEC: %d", 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pps); 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (le_to_host32(tspec->minimum_phy_rate) < 1000000) { 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Too small Minimum PHY Rate"); 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WMM_ADDTS_STATUS_INVALID_PARAMETERS; 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt duration = (le_to_host16(tspec->nominal_msdu_size) & 0x7fff) * 8 / 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (le_to_host32(tspec->minimum_phy_rate) / 1000000) + 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 50 /* FIX: proper SIFS + ACK duration */; 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* unsigned binary number with an implicit binary point after the 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * leftmost 3 bits, i.e., 0x2000 = 1.0 */ 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt surplus = le_to_host16(tspec->surplus_bandwidth_allowance); 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (surplus <= 0x2000) { 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Surplus Bandwidth Allowance not " 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "greater than unity"); 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WMM_ADDTS_STATUS_INVALID_PARAMETERS; 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt medium_time = surplus * pps * duration / 0x2000; 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Estimated medium time: %u", medium_time); 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * TODO: store list of granted (and still active) TSPECs and check 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * whether there is available medium time for this request. For now, 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * just refuse requests that would by themselves take very large 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * portion of the available bandwidth. 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (medium_time > 750000) { 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: Refuse TSPEC request for over " 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "75%% of available bandwidth"); 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WMM_ADDTS_STATUS_REFUSED; 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Convert to 32 microseconds per second unit */ 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt tspec->medium_time = host_to_le16(medium_time / 32); 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WMM_ADDTS_STATUS_ADMISSION_ACCEPTED; 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void wmm_addts_req(struct hostapd_data *hapd, 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct ieee80211_mgmt *mgmt, 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wmm_tspec_element *tspec, size_t len) 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *end = ((const u8 *) mgmt) + len; 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int res; 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((const u8 *) (tspec + 1) > end) { 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: TSPEC overflow in ADDTS Request"); 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: ADDTS Request (Dialog Token %d) for TSPEC " 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "from " MACSTR, 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt mgmt->u.action.u.wmm_action.dialog_token, 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt MAC2STR(mgmt->sa)); 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = wmm_process_tspec(tspec); 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "WMM: ADDTS processing result: %d", res); 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm_send_action(hapd, mgmt->sa, tspec, WMM_ACTION_CODE_ADDTS_RESP, 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt mgmt->u.action.u.wmm_action.dialog_token, res); 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid hostapd_wmm_action(struct hostapd_data *hapd, 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct ieee80211_mgmt *mgmt, size_t len) 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int action_code; 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int left = len - IEEE80211_HDRLEN - 4; 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 4; 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee802_11_elems elems; 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct sta_info *sta = ap_get_sta(hapd, mgmt->sa); 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* check that the request comes from a valid station */ 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!sta || 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (sta->flags & (WLAN_STA_ASSOC | WLAN_STA_WMM)) != 2748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (WLAN_STA_ASSOC | WLAN_STA_WMM)) { 2758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HOSTAPD_LEVEL_DEBUG, 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "wmm action received is not from associated wmm" 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt " station"); 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: respond with action frame refused status code */ 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* extract the tspec info element */ 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed) { 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HOSTAPD_LEVEL_DEBUG, 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "hostapd_wmm_action - could not parse wmm " 2888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "action"); 2898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: respond with action frame invalid parameters status 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * code */ 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!elems.wmm_tspec || 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt elems.wmm_tspec_len != (sizeof(struct wmm_tspec_element) - 2)) { 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HOSTAPD_LEVEL_DEBUG, 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "hostapd_wmm_action - missing or wrong length " 2998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "tspec"); 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: respond with action frame invalid parameters status 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * code */ 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: check the request is for an AC with ACM set, if not, refuse 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * request */ 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt action_code = mgmt->u.action.u.wmm_action.action_code; 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (action_code) { 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case WMM_ACTION_CODE_ADDTS_REQ: 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm_addts_req(hapd, mgmt, (struct wmm_tspec_element *) 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (elems.wmm_tspec - 2), len); 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#if 0 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: needed for client implementation */ 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case WMM_ACTION_CODE_ADDTS_RESP: 3178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm_setup_request(hapd, mgmt, len); 3188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: handle station teardown requests */ 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case WMM_ACTION_CODE_DELTS: 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wmm_teardown(hapd, mgmt, len); 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HOSTAPD_LEVEL_DEBUG, 3288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "hostapd_wmm_action - unknown action code %d", 3298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt action_code); 3308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 331