From 9e8571affd1c54b9638b4ff9844e47aae07310f6 Mon Sep 17 00:00:00 2001 From: James Ketrenos Date: Wed, 21 Sep 2005 11:56:33 -0500 Subject: [PATCH] ieee80211: Add QoS (WME) support to the ieee80211 subsystem tree a3ad796273e98036eb0e9fc063225070fa24508a parent 1b9c0aeb377abf8e4a43a86cff42382f74ca0259 author Mohamed Abbas 1124447069 -0500 committer James Ketrenos 1127313435 -0500 Add QoS (WME) support to the ieee80211 subsystem. NOTE: This requires drivers that use the ieee80211 hard_start_xmit (ipw2100 and ipw2200) to add the priority parameter to their callback. Signed-off-by: James Ketrenos Signed-off-by: Jeff Garzik --- net/ieee80211/ieee80211_rx.c | 334 ++++++++++++++++++++++++++++++++++++++++--- net/ieee80211/ieee80211_tx.c | 5 +- 2 files changed, 318 insertions(+), 21 deletions(-) (limited to 'net/ieee80211') diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c index d1ae28280d7e..2c4613527dfd 100644 --- a/net/ieee80211/ieee80211_rx.c +++ b/net/ieee80211/ieee80211_rx.c @@ -534,6 +534,9 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, /* Nullfunc frames may have PS-bit set, so they must be passed to * hostap_handle_sta_rx() before being dropped here. */ + + stype &= ~IEEE80211_STYPE_QOS_DATA; + if (stype != IEEE80211_STYPE_DATA && stype != IEEE80211_STYPE_DATA_CFACK && stype != IEEE80211_STYPE_DATA_CFPOLL && @@ -758,6 +761,264 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 +static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; + +/* +* Make ther structure we read from the beacon packet has +* the right values +*/ +static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element + *info_element, int sub_type) +{ + + if (info_element->qui_subtype != sub_type) + return -1; + if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) + return -1; + if (info_element->qui_type != QOS_OUI_TYPE) + return -1; + if (info_element->version != QOS_VERSION_1) + return -1; + + return 0; +} + +/* + * Parse a QoS parameter element + */ +static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info + *element_param, struct ieee80211_info_element + *info_element) +{ + int ret = 0; + u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2; + + if ((info_element == NULL) || (element_param == NULL)) + return -1; + + if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { + memcpy(element_param->info_element.qui, info_element->data, + info_element->len); + element_param->info_element.elementID = info_element->id; + element_param->info_element.length = info_element->len; + } else + ret = -1; + if (ret == 0) + ret = ieee80211_verify_qos_info(&element_param->info_element, + QOS_OUI_PARAM_SUB_TYPE); + return ret; +} + +/* + * Parse a QoS information element + */ +static int ieee80211_read_qos_info_element(struct + ieee80211_qos_information_element + *element_info, struct ieee80211_info_element + *info_element) +{ + int ret = 0; + u16 size = sizeof(struct ieee80211_qos_information_element) - 2; + + if (element_info == NULL) + return -1; + if (info_element == NULL) + return -1; + + if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { + memcpy(element_info->qui, info_element->data, + info_element->len); + element_info->elementID = info_element->id; + element_info->length = info_element->len; + } else + ret = -1; + + if (ret == 0) + ret = ieee80211_verify_qos_info(element_info, + QOS_OUI_INFO_SUB_TYPE); + return ret; +} + +/* + * Write QoS parameters from the ac parameters. + */ +static int ieee80211_qos_convert_ac_to_parameters(struct + ieee80211_qos_parameter_info + *param_elm, struct + ieee80211_qos_parameters + *qos_param) +{ + int rc = 0; + int i; + struct ieee80211_qos_ac_parameter *ac_params; + u32 txop; + u8 cw_min; + u8 cw_max; + + for (i = 0; i < QOS_QUEUE_NUM; i++) { + ac_params = &(param_elm->ac_params_record[i]); + + qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F; + qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2; + + cw_min = ac_params->ecw_min_max & 0x0F; + qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1); + + cw_max = (ac_params->ecw_min_max & 0xF0) >> 4; + qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1); + + qos_param->flag[i] = + (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; + + txop = le16_to_cpu(ac_params->tx_op_limit) * 32; + qos_param->tx_op_limit[i] = (u16) txop; + } + return rc; +} + +/* + * we have a generic data element which it may contain QoS information or + * parameters element. check the information element length to decide + * which type to read + */ +static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element + *info_element, + struct ieee80211_network *network) +{ + int rc = 0; + struct ieee80211_qos_parameters *qos_param = NULL; + struct ieee80211_qos_information_element qos_info_element; + + rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); + + if (rc == 0) { + network->qos_data.param_count = qos_info_element.ac_info & 0x0F; + network->flags |= NETWORK_HAS_QOS_INFORMATION; + } else { + struct ieee80211_qos_parameter_info param_element; + + rc = ieee80211_read_qos_param_element(¶m_element, + info_element); + if (rc == 0) { + qos_param = &(network->qos_data.parameters); + ieee80211_qos_convert_ac_to_parameters(¶m_element, + qos_param); + network->flags |= NETWORK_HAS_QOS_PARAMETERS; + network->qos_data.param_count = + param_element.info_element.ac_info & 0x0F; + } + } + + if (rc == 0) { + IEEE80211_DEBUG_QOS("QoS is supported\n"); + network->qos_data.supported = 1; + } + return rc; +} + +static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response + *frame, struct ieee80211_rx_stats *stats) +{ + struct ieee80211_network network_resp; + struct ieee80211_network *network = &network_resp; + struct ieee80211_info_element *info_element; + struct net_device *dev = ieee->dev; + u16 left; + + network->flags = 0; + network->qos_data.active = 0; + network->qos_data.supported = 0; + network->qos_data.param_count = 0; + network->qos_data.old_param_count = 0; + + //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF); + network->atim_window = le16_to_cpu(frame->aid); + network->listen_interval = le16_to_cpu(frame->status); + + info_element = frame->info_element; + left = stats->len - sizeof(*frame); + + while (left >= sizeof(struct ieee80211_info_element)) { + if (sizeof(struct ieee80211_info_element) + + info_element->len > left) { + IEEE80211_DEBUG_QOS("ASSOC RESP: parse failed: " + "info_element->len + 2 > left : " + "info_element->len+2=%zd left=%d, id=%d.\n", + info_element->len + + sizeof(struct + ieee80211_info_element), + left, info_element->id); + return 1; + } + + switch (info_element->id) { + case MFIE_TYPE_SSID: + if (ieee80211_is_empty_essid(info_element->data, + info_element->len)) { + network->flags |= NETWORK_EMPTY_ESSID; + break; + } + + network->ssid_len = min(info_element->len, + (u8) IW_ESSID_MAX_SIZE); + memcpy(network->ssid, info_element->data, + network->ssid_len); + if (network->ssid_len < IW_ESSID_MAX_SIZE) + memset(network->ssid + network->ssid_len, 0, + IW_ESSID_MAX_SIZE - network->ssid_len); + + IEEE80211_DEBUG_QOS("MFIE_TYPE_SSID: '%s' len=%d.\n", + network->ssid, network->ssid_len); + break; + + case MFIE_TYPE_TIM: + IEEE80211_DEBUG_QOS("MFIE_TYPE_TIM: ignored\n"); + break; + + case MFIE_TYPE_IBSS_SET: + IEEE80211_DEBUG_QOS("MFIE_TYPE_IBSS_SET: ignored\n"); + break; + + case MFIE_TYPE_CHALLENGE: + IEEE80211_DEBUG_QOS("MFIE_TYPE_CHALLENGE: ignored\n"); + break; + + case MFIE_TYPE_GENERIC: + IEEE80211_DEBUG_QOS("MFIE_TYPE_GENERIC: %d bytes\n", + info_element->len); + ieee80211_parse_qos_info_param_IE(info_element, + network); + break; + + case MFIE_TYPE_RSN: + IEEE80211_DEBUG_QOS("MFIE_TYPE_RSN: %d bytes\n", + info_element->len); + break; + + case MFIE_TYPE_QOS_PARAMETER: + printk("QoS Error need to parse QOS_PARAMETER IE\n"); + break; + + default: + IEEE80211_DEBUG_QOS("unsupported IE %d\n", + info_element->id); + break; + } + + left -= sizeof(struct ieee80211_info_element) + + info_element->len; + info_element = (struct ieee80211_info_element *) + &info_element->data[info_element->len]; + } + + if (ieee->handle_assoc_response != NULL) + ieee->handle_assoc_response(dev, frame, network); + + return 0; +} + +/***************************************************/ + static inline int ieee80211_is_ofdm_rate(u8 rate) { switch (rate & ~IEEE80211_BASIC_RATE_MASK) { @@ -786,6 +1047,9 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i struct ieee80211_info_element *info_element; u16 left; u8 i; + network->qos_data.active = 0; + network->qos_data.supported = 0; + network->qos_data.param_count = 0; /* Pull out fixed field data */ memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); @@ -813,13 +1077,11 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i info_element = beacon->info_element; left = stats->len - sizeof(*beacon); - while (left >= sizeof(struct ieee80211_info_element)) { - if (sizeof(struct ieee80211_info_element) + info_element->len > - left) { + while (left >= sizeof(*info_element)) { + if (sizeof(*info_element) + info_element->len > left) { IEEE80211_DEBUG_SCAN ("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%Zd left=%d.\n", - info_element->len + - sizeof(struct ieee80211_info_element), left); + info_element->len + sizeof(*info_element), left); return 1; } @@ -847,15 +1109,14 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i #ifdef CONFIG_IEEE80211_DEBUG p = rates_str; #endif - network->rates_len = - min(info_element->len, MAX_RATES_LENGTH); + network->rates_len = min(info_element->len, + MAX_RATES_LENGTH); for (i = 0; i < network->rates_len; i++) { network->rates[i] = info_element->data[i]; #ifdef CONFIG_IEEE80211_DEBUG - p += snprintf(p, - sizeof(rates_str) - (p - - rates_str), - "%02X ", network->rates[i]); + p += snprintf(p, sizeof(rates_str) - + (p - rates_str), "%02X ", + network->rates[i]); #endif if (ieee80211_is_ofdm_rate (info_element->data[i])) { @@ -875,15 +1136,14 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i #ifdef CONFIG_IEEE80211_DEBUG p = rates_str; #endif - network->rates_ex_len = - min(info_element->len, MAX_RATES_EX_LENGTH); + network->rates_ex_len = min(info_element->len, + MAX_RATES_EX_LENGTH); for (i = 0; i < network->rates_ex_len; i++) { network->rates_ex[i] = info_element->data[i]; #ifdef CONFIG_IEEE80211_DEBUG - p += snprintf(p, - sizeof(rates_str) - (p - - rates_str), - "%02X ", network->rates[i]); + p += snprintf(p, sizeof(rates_str) - + (p - rates_str), "%02X ", + network->rates[i]); #endif if (ieee80211_is_ofdm_rate (info_element->data[i])) { @@ -929,6 +1189,10 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i case MFIE_TYPE_GENERIC: IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n", info_element->len); + if (!ieee80211_parse_qos_info_param_IE(info_element, + network)) + break; + if (info_element->len >= 4 && info_element->data[0] == 0x00 && info_element->data[1] == 0x50 && @@ -950,14 +1214,18 @@ static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct i network->rsn_ie_len); break; + case MFIE_TYPE_QOS_PARAMETER: + printk(KERN_ERR + "QoS Error need to parse QOS_PARAMETER IE\n"); + break; + default: IEEE80211_DEBUG_SCAN("unsupported IE %d\n", info_element->id); break; } - left -= sizeof(struct ieee80211_info_element) + - info_element->len; + left -= sizeof(*info_element) + info_element->len; info_element = (struct ieee80211_info_element *) &info_element->data[info_element->len]; } @@ -1004,6 +1272,9 @@ static inline int is_same_network(struct ieee80211_network *src, static inline void update_network(struct ieee80211_network *dst, struct ieee80211_network *src) { + int qos_active; + u8 old_param; + memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); dst->capability = src->capability; memcpy(dst->rates, src->rates, src->rates_len); @@ -1026,6 +1297,28 @@ static inline void update_network(struct ieee80211_network *dst, dst->rsn_ie_len = src->rsn_ie_len; dst->last_scanned = jiffies; + qos_active = src->qos_data.active; + old_param = dst->qos_data.old_param_count; + if (dst->flags & NETWORK_HAS_QOS_MASK) + memcpy(&dst->qos_data, &src->qos_data, + sizeof(struct ieee80211_qos_data)); + else { + dst->qos_data.supported = src->qos_data.supported; + dst->qos_data.param_count = src->qos_data.param_count; + } + + if (dst->qos_data.supported == 1) { + if (dst->ssid_len) + IEEE80211_DEBUG_QOS + ("QoS the network %s is QoS supported\n", + dst->ssid); + else + IEEE80211_DEBUG_QOS + ("QoS the network is QoS supported\n"); + } + dst->qos_data.active = qos_active; + dst->qos_data.old_param_count = old_param; + /* dst->last_associate is not overwritten */ } @@ -1167,6 +1460,9 @@ void ieee80211_rx_mgt(struct ieee80211_device *ieee, IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n", WLAN_FC_GET_STYPE(le16_to_cpu (header->frame_ctl))); + ieee80211_handle_assoc_resp(ieee, + (struct ieee80211_assoc_response *) + header, stats); break; case IEEE80211_STYPE_REASSOC_RESP: diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c index e9efdd42ba37..aba72f9880a1 100644 --- a/net/ieee80211/ieee80211_tx.c +++ b/net/ieee80211/ieee80211_tx.c @@ -465,7 +465,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) dev_kfree_skb_any(skb); if (txb) { - int ret = (*ieee->hard_start_xmit) (txb, dev); + int ret = (*ieee->hard_start_xmit) (txb, dev, priority); if (ret == 0) { stats->tx_packets++; stats->tx_bytes += txb->payload_size; @@ -500,6 +500,7 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee, unsigned long flags; struct net_device_stats *stats = &ieee->stats; struct sk_buff *skb_frag; + int priority = -1; spin_lock_irqsave(&ieee->lock, flags); @@ -540,7 +541,7 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee, spin_unlock_irqrestore(&ieee->lock, flags); if (txb) { - if ((*ieee->hard_start_xmit) (txb, ieee->dev) == 0) { + if ((*ieee->hard_start_xmit) (txb, ieee->dev, priority) == 0) { stats->tx_packets++; stats->tx_bytes += txb->payload_size; return 0; -- cgit v1.2.3