Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jouni Malinen | 2160 | 97.43% | 3 | 16.67% |
Al Viro | 11 | 0.50% | 2 | 11.11% |
David Howells | 10 | 0.45% | 1 | 5.56% |
Adrian Bunk | 9 | 0.41% | 1 | 5.56% |
Wei Yongjun | 5 | 0.23% | 1 | 5.56% |
Dan J Williams | 3 | 0.14% | 1 | 5.56% |
Alexey Dobriyan | 3 | 0.14% | 1 | 5.56% |
Tejun Heo | 3 | 0.14% | 1 | 5.56% |
Johannes Berg | 3 | 0.14% | 1 | 5.56% |
Paul Gortmaker | 3 | 0.14% | 1 | 5.56% |
Yan Burman | 2 | 0.09% | 1 | 5.56% |
Joe Perches | 2 | 0.09% | 2 | 11.11% |
Kees Cook | 2 | 0.09% | 1 | 5.56% |
Greg Kroah-Hartman | 1 | 0.05% | 1 | 5.56% |
Total | 2217 | 18 |
// SPDX-License-Identifier: GPL-2.0 /* Host AP driver Info Frame processing (part of hostap.o module) */ #include <linux/if_arp.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/export.h> #include <linux/etherdevice.h> #include "hostap_wlan.h" #include "hostap.h" #include "hostap_ap.h" /* Called only as a tasklet (software IRQ) */ static void prism2_info_commtallies16(local_info_t *local, unsigned char *buf, int left) { struct hfa384x_comm_tallies *tallies; if (left < sizeof(struct hfa384x_comm_tallies)) { printk(KERN_DEBUG "%s: too short (len=%d) commtallies " "info frame\n", local->dev->name, left); return; } tallies = (struct hfa384x_comm_tallies *) buf; #define ADD_COMM_TALLIES(name) \ local->comm_tallies.name += le16_to_cpu(tallies->name) ADD_COMM_TALLIES(tx_unicast_frames); ADD_COMM_TALLIES(tx_multicast_frames); ADD_COMM_TALLIES(tx_fragments); ADD_COMM_TALLIES(tx_unicast_octets); ADD_COMM_TALLIES(tx_multicast_octets); ADD_COMM_TALLIES(tx_deferred_transmissions); ADD_COMM_TALLIES(tx_single_retry_frames); ADD_COMM_TALLIES(tx_multiple_retry_frames); ADD_COMM_TALLIES(tx_retry_limit_exceeded); ADD_COMM_TALLIES(tx_discards); ADD_COMM_TALLIES(rx_unicast_frames); ADD_COMM_TALLIES(rx_multicast_frames); ADD_COMM_TALLIES(rx_fragments); ADD_COMM_TALLIES(rx_unicast_octets); ADD_COMM_TALLIES(rx_multicast_octets); ADD_COMM_TALLIES(rx_fcs_errors); ADD_COMM_TALLIES(rx_discards_no_buffer); ADD_COMM_TALLIES(tx_discards_wrong_sa); ADD_COMM_TALLIES(rx_discards_wep_undecryptable); ADD_COMM_TALLIES(rx_message_in_msg_fragments); ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); #undef ADD_COMM_TALLIES } /* Called only as a tasklet (software IRQ) */ static void prism2_info_commtallies32(local_info_t *local, unsigned char *buf, int left) { struct hfa384x_comm_tallies32 *tallies; if (left < sizeof(struct hfa384x_comm_tallies32)) { printk(KERN_DEBUG "%s: too short (len=%d) commtallies32 " "info frame\n", local->dev->name, left); return; } tallies = (struct hfa384x_comm_tallies32 *) buf; #define ADD_COMM_TALLIES(name) \ local->comm_tallies.name += le32_to_cpu(tallies->name) ADD_COMM_TALLIES(tx_unicast_frames); ADD_COMM_TALLIES(tx_multicast_frames); ADD_COMM_TALLIES(tx_fragments); ADD_COMM_TALLIES(tx_unicast_octets); ADD_COMM_TALLIES(tx_multicast_octets); ADD_COMM_TALLIES(tx_deferred_transmissions); ADD_COMM_TALLIES(tx_single_retry_frames); ADD_COMM_TALLIES(tx_multiple_retry_frames); ADD_COMM_TALLIES(tx_retry_limit_exceeded); ADD_COMM_TALLIES(tx_discards); ADD_COMM_TALLIES(rx_unicast_frames); ADD_COMM_TALLIES(rx_multicast_frames); ADD_COMM_TALLIES(rx_fragments); ADD_COMM_TALLIES(rx_unicast_octets); ADD_COMM_TALLIES(rx_multicast_octets); ADD_COMM_TALLIES(rx_fcs_errors); ADD_COMM_TALLIES(rx_discards_no_buffer); ADD_COMM_TALLIES(tx_discards_wrong_sa); ADD_COMM_TALLIES(rx_discards_wep_undecryptable); ADD_COMM_TALLIES(rx_message_in_msg_fragments); ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); #undef ADD_COMM_TALLIES } /* Called only as a tasklet (software IRQ) */ static void prism2_info_commtallies(local_info_t *local, unsigned char *buf, int left) { if (local->tallies32) prism2_info_commtallies32(local, buf, left); else prism2_info_commtallies16(local, buf, left); } #ifndef PRISM2_NO_STATION_MODES #ifndef PRISM2_NO_DEBUG static const char* hfa384x_linkstatus_str(u16 linkstatus) { switch (linkstatus) { case HFA384X_LINKSTATUS_CONNECTED: return "Connected"; case HFA384X_LINKSTATUS_DISCONNECTED: return "Disconnected"; case HFA384X_LINKSTATUS_AP_CHANGE: return "Access point change"; case HFA384X_LINKSTATUS_AP_OUT_OF_RANGE: return "Access point out of range"; case HFA384X_LINKSTATUS_AP_IN_RANGE: return "Access point in range"; case HFA384X_LINKSTATUS_ASSOC_FAILED: return "Association failed"; default: return "Unknown"; } } #endif /* PRISM2_NO_DEBUG */ /* Called only as a tasklet (software IRQ) */ static void prism2_info_linkstatus(local_info_t *local, unsigned char *buf, int left) { u16 val; int non_sta_mode; /* Alloc new JoinRequests to occur since LinkStatus for the previous * has been received */ local->last_join_time = 0; if (left != 2) { printk(KERN_DEBUG "%s: invalid linkstatus info frame " "length %d\n", local->dev->name, left); return; } non_sta_mode = local->iw_mode == IW_MODE_MASTER || local->iw_mode == IW_MODE_REPEAT || local->iw_mode == IW_MODE_MONITOR; val = buf[0] | (buf[1] << 8); if (!non_sta_mode || val != HFA384X_LINKSTATUS_DISCONNECTED) { PDEBUG(DEBUG_EXTRA, "%s: LinkStatus=%d (%s)\n", local->dev->name, val, hfa384x_linkstatus_str(val)); } if (non_sta_mode) { netif_carrier_on(local->dev); netif_carrier_on(local->ddev); return; } /* Get current BSSID later in scheduled task */ set_bit(PRISM2_INFO_PENDING_LINKSTATUS, &local->pending_info); local->prev_link_status = val; schedule_work(&local->info_queue); } static void prism2_host_roaming(local_info_t *local) { struct hfa384x_join_request req; struct net_device *dev = local->dev; struct hfa384x_hostscan_result *selected, *entry; int i; unsigned long flags; if (local->last_join_time && time_before(jiffies, local->last_join_time + 10 * HZ)) { PDEBUG(DEBUG_EXTRA, "%s: last join request has not yet been " "completed - waiting for it before issuing new one\n", dev->name); return; } /* ScanResults are sorted: first ESS results in decreasing signal * quality then IBSS results in similar order. * Trivial roaming policy: just select the first entry. * This could probably be improved by adding hysteresis to limit * number of handoffs, etc. * * Could do periodic RID_SCANREQUEST or Inquire F101 to get new * ScanResults */ spin_lock_irqsave(&local->lock, flags); if (local->last_scan_results == NULL || local->last_scan_results_count == 0) { spin_unlock_irqrestore(&local->lock, flags); PDEBUG(DEBUG_EXTRA, "%s: no scan results for host roaming\n", dev->name); return; } selected = &local->last_scan_results[0]; if (local->preferred_ap[0] || local->preferred_ap[1] || local->preferred_ap[2] || local->preferred_ap[3] || local->preferred_ap[4] || local->preferred_ap[5]) { /* Try to find preferred AP */ PDEBUG(DEBUG_EXTRA, "%s: Preferred AP BSSID %pM\n", dev->name, local->preferred_ap); for (i = 0; i < local->last_scan_results_count; i++) { entry = &local->last_scan_results[i]; if (memcmp(local->preferred_ap, entry->bssid, 6) == 0) { PDEBUG(DEBUG_EXTRA, "%s: using preferred AP " "selection\n", dev->name); selected = entry; break; } } } memcpy(req.bssid, selected->bssid, ETH_ALEN); req.channel = selected->chid; spin_unlock_irqrestore(&local->lock, flags); PDEBUG(DEBUG_EXTRA, "%s: JoinRequest: BSSID=%pM" " channel=%d\n", dev->name, req.bssid, le16_to_cpu(req.channel)); if (local->func->set_rid(dev, HFA384X_RID_JOINREQUEST, &req, sizeof(req))) { printk(KERN_DEBUG "%s: JoinRequest failed\n", dev->name); } local->last_join_time = jiffies; } static void hostap_report_scan_complete(local_info_t *local) { union iwreq_data wrqu; /* Inform user space about new scan results (just empty event, * SIOCGIWSCAN can be used to fetch data */ wrqu.data.length = 0; wrqu.data.flags = 0; wireless_send_event(local->dev, SIOCGIWSCAN, &wrqu, NULL); /* Allow SIOCGIWSCAN handling to occur since we have received * scanning result */ local->scan_timestamp = 0; } /* Called only as a tasklet (software IRQ) */ static void prism2_info_scanresults(local_info_t *local, unsigned char *buf, int left) { u16 *pos; int new_count, i; unsigned long flags; struct hfa384x_scan_result *res; struct hfa384x_hostscan_result *results, *prev; if (left < 4) { printk(KERN_DEBUG "%s: invalid scanresult info frame " "length %d\n", local->dev->name, left); return; } pos = (u16 *) buf; pos++; pos++; left -= 4; new_count = left / sizeof(struct hfa384x_scan_result); results = kmalloc_array(new_count, sizeof(struct hfa384x_hostscan_result), GFP_ATOMIC); if (results == NULL) return; /* Convert to hostscan result format. */ res = (struct hfa384x_scan_result *) pos; for (i = 0; i < new_count; i++) { memcpy(&results[i], &res[i], sizeof(struct hfa384x_scan_result)); results[i].atim = 0; } spin_lock_irqsave(&local->lock, flags); local->last_scan_type = PRISM2_SCAN; prev = local->last_scan_results; local->last_scan_results = results; local->last_scan_results_count = new_count; spin_unlock_irqrestore(&local->lock, flags); kfree(prev); hostap_report_scan_complete(local); /* Perform rest of ScanResults handling later in scheduled task */ set_bit(PRISM2_INFO_PENDING_SCANRESULTS, &local->pending_info); schedule_work(&local->info_queue); } /* Called only as a tasklet (software IRQ) */ static void prism2_info_hostscanresults(local_info_t *local, unsigned char *buf, int left) { int i, result_size, copy_len, new_count; struct hfa384x_hostscan_result *results, *prev; unsigned long flags; __le16 *pos; u8 *ptr; wake_up_interruptible(&local->hostscan_wq); if (left < 4) { printk(KERN_DEBUG "%s: invalid hostscanresult info frame " "length %d\n", local->dev->name, left); return; } pos = (__le16 *) buf; copy_len = result_size = le16_to_cpu(*pos); if (result_size == 0) { printk(KERN_DEBUG "%s: invalid result_size (0) in " "hostscanresults\n", local->dev->name); return; } if (copy_len > sizeof(struct hfa384x_hostscan_result)) copy_len = sizeof(struct hfa384x_hostscan_result); pos++; pos++; left -= 4; ptr = (u8 *) pos; new_count = left / result_size; results = kcalloc(new_count, sizeof(struct hfa384x_hostscan_result), GFP_ATOMIC); if (results == NULL) return; for (i = 0; i < new_count; i++) { memcpy(&results[i], ptr, copy_len); ptr += result_size; left -= result_size; } if (left) { printk(KERN_DEBUG "%s: short HostScan result entry (%d/%d)\n", local->dev->name, left, result_size); } spin_lock_irqsave(&local->lock, flags); local->last_scan_type = PRISM2_HOSTSCAN; prev = local->last_scan_results; local->last_scan_results = results; local->last_scan_results_count = new_count; spin_unlock_irqrestore(&local->lock, flags); kfree(prev); hostap_report_scan_complete(local); } #endif /* PRISM2_NO_STATION_MODES */ /* Called only as a tasklet (software IRQ) */ void hostap_info_process(local_info_t *local, struct sk_buff *skb) { struct hfa384x_info_frame *info; unsigned char *buf; int left; #ifndef PRISM2_NO_DEBUG int i; #endif /* PRISM2_NO_DEBUG */ info = (struct hfa384x_info_frame *) skb->data; buf = skb->data + sizeof(*info); left = skb->len - sizeof(*info); switch (le16_to_cpu(info->type)) { case HFA384X_INFO_COMMTALLIES: prism2_info_commtallies(local, buf, left); break; #ifndef PRISM2_NO_STATION_MODES case HFA384X_INFO_LINKSTATUS: prism2_info_linkstatus(local, buf, left); break; case HFA384X_INFO_SCANRESULTS: prism2_info_scanresults(local, buf, left); break; case HFA384X_INFO_HOSTSCANRESULTS: prism2_info_hostscanresults(local, buf, left); break; #endif /* PRISM2_NO_STATION_MODES */ #ifndef PRISM2_NO_DEBUG default: PDEBUG(DEBUG_EXTRA, "%s: INFO - len=%d type=0x%04x\n", local->dev->name, le16_to_cpu(info->len), le16_to_cpu(info->type)); PDEBUG(DEBUG_EXTRA, "Unknown info frame:"); for (i = 0; i < (left < 100 ? left : 100); i++) PDEBUG2(DEBUG_EXTRA, " %02x", buf[i]); PDEBUG2(DEBUG_EXTRA, "\n"); break; #endif /* PRISM2_NO_DEBUG */ } } #ifndef PRISM2_NO_STATION_MODES static void handle_info_queue_linkstatus(local_info_t *local) { int val = local->prev_link_status; int connected; union iwreq_data wrqu; connected = val == HFA384X_LINKSTATUS_CONNECTED || val == HFA384X_LINKSTATUS_AP_CHANGE || val == HFA384X_LINKSTATUS_AP_IN_RANGE; if (local->func->get_rid(local->dev, HFA384X_RID_CURRENTBSSID, local->bssid, ETH_ALEN, 1) < 0) { printk(KERN_DEBUG "%s: could not read CURRENTBSSID after " "LinkStatus event\n", local->dev->name); } else { PDEBUG(DEBUG_EXTRA, "%s: LinkStatus: BSSID=%pM\n", local->dev->name, (unsigned char *) local->bssid); if (local->wds_type & HOSTAP_WDS_AP_CLIENT) hostap_add_sta(local->ap, local->bssid); } /* Get BSSID if we have a valid AP address */ if (connected) { netif_carrier_on(local->dev); netif_carrier_on(local->ddev); memcpy(wrqu.ap_addr.sa_data, local->bssid, ETH_ALEN); } else { netif_carrier_off(local->dev); netif_carrier_off(local->ddev); eth_zero_addr(wrqu.ap_addr.sa_data); } wrqu.ap_addr.sa_family = ARPHRD_ETHER; /* * Filter out sequential disconnect events in order not to cause a * flood of SIOCGIWAP events that have a race condition with EAPOL * frames and can confuse wpa_supplicant about the current association * status. */ if (connected || local->prev_linkstatus_connected) wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL); local->prev_linkstatus_connected = connected; } static void handle_info_queue_scanresults(local_info_t *local) { if (local->host_roaming == 1 && local->iw_mode == IW_MODE_INFRA) prism2_host_roaming(local); if (local->host_roaming == 2 && local->iw_mode == IW_MODE_INFRA && !is_zero_ether_addr(local->preferred_ap)) { /* * Firmware seems to be getting into odd state in host_roaming * mode 2 when hostscan is used without join command, so try * to fix this by re-joining the current AP. This does not * actually trigger a new association if the current AP is * still in the scan results. */ prism2_host_roaming(local); } } /* Called only as scheduled task after receiving info frames (used to avoid * pending too much time in HW IRQ handler). */ static void handle_info_queue(struct work_struct *work) { local_info_t *local = container_of(work, local_info_t, info_queue); if (test_and_clear_bit(PRISM2_INFO_PENDING_LINKSTATUS, &local->pending_info)) handle_info_queue_linkstatus(local); if (test_and_clear_bit(PRISM2_INFO_PENDING_SCANRESULTS, &local->pending_info)) handle_info_queue_scanresults(local); } #endif /* PRISM2_NO_STATION_MODES */ void hostap_info_init(local_info_t *local) { skb_queue_head_init(&local->info_list); #ifndef PRISM2_NO_STATION_MODES INIT_WORK(&local->info_queue, handle_info_queue); #endif /* PRISM2_NO_STATION_MODES */ } EXPORT_SYMBOL(hostap_info_init); EXPORT_SYMBOL(hostap_info_process);
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