diff options
Diffstat (limited to 'wpa_supplicant/offchannel.c')
-rw-r--r-- | wpa_supplicant/offchannel.c | 488 |
1 files changed, 0 insertions, 488 deletions
diff --git a/wpa_supplicant/offchannel.c b/wpa_supplicant/offchannel.c deleted file mode 100644 index e40cf5bbebcd..000000000000 --- a/wpa_supplicant/offchannel.c +++ /dev/null @@ -1,488 +0,0 @@ -/* - * wpa_supplicant - Off-channel Action frame TX/RX - * Copyright (c) 2009-2010, Atheros Communications - * Copyright (c) 2011, Qualcomm Atheros - * - * This software may be distributed under the terms of the BSD license. - * See README for more details. - */ - -#include "includes.h" - -#include "common.h" -#include "utils/eloop.h" -#include "wpa_supplicant_i.h" -#include "p2p_supplicant.h" -#include "driver_i.h" -#include "offchannel.h" - - - -static struct wpa_supplicant * -wpas_get_tx_interface(struct wpa_supplicant *wpa_s, const u8 *src) -{ - struct wpa_supplicant *iface; - - if (os_memcmp(src, wpa_s->own_addr, ETH_ALEN) == 0) { -#ifdef CONFIG_P2P - if (wpa_s->p2p_mgmt && wpa_s != wpa_s->parent && - wpa_s->parent->ap_iface && - os_memcmp(wpa_s->parent->own_addr, - wpa_s->own_addr, ETH_ALEN) == 0 && - wpabuf_len(wpa_s->pending_action_tx) >= 2 && - *wpabuf_head_u8(wpa_s->pending_action_tx) != - WLAN_ACTION_PUBLIC) { - /* - * When P2P Device interface has same MAC address as - * the GO interface, make sure non-Public Action frames - * are sent through the GO interface. The P2P Device - * interface can only send Public Action frames. - */ - wpa_printf(MSG_DEBUG, - "P2P: Use GO interface %s instead of interface %s for Action TX", - wpa_s->parent->ifname, wpa_s->ifname); - return wpa_s->parent; - } -#endif /* CONFIG_P2P */ - return wpa_s; - } - - /* - * Try to find a group interface that matches with the source address. - */ - iface = wpa_s->global->ifaces; - while (iface) { - if (os_memcmp(src, iface->own_addr, ETH_ALEN) == 0) - break; - iface = iface->next; - } - if (iface) { - wpa_printf(MSG_DEBUG, "P2P: Use group interface %s " - "instead of interface %s for Action TX", - iface->ifname, wpa_s->ifname); - return iface; - } - - return wpa_s; -} - - -static void wpas_send_action_cb(void *eloop_ctx, void *timeout_ctx) -{ - struct wpa_supplicant *wpa_s = eloop_ctx; - struct wpa_supplicant *iface; - int res; - int without_roc; - - without_roc = wpa_s->pending_action_without_roc; - wpa_s->pending_action_without_roc = 0; - wpa_printf(MSG_DEBUG, - "Off-channel: Send Action callback (without_roc=%d pending_action_tx=%p pending_action_tx_done=%d)", - without_roc, wpa_s->pending_action_tx, - !!wpa_s->pending_action_tx_done); - - if (wpa_s->pending_action_tx == NULL || wpa_s->pending_action_tx_done) - return; - - /* - * This call is likely going to be on the P2P device instance if the - * driver uses a separate interface for that purpose. However, some - * Action frames are actually sent within a P2P Group and when that is - * the case, we need to follow power saving (e.g., GO buffering the - * frame for a client in PS mode or a client following the advertised - * NoA from its GO). To make that easier for the driver, select the - * correct group interface here. - */ - iface = wpas_get_tx_interface(wpa_s, wpa_s->pending_action_src); - - if (wpa_s->off_channel_freq != wpa_s->pending_action_freq && - wpa_s->pending_action_freq != 0 && - wpa_s->pending_action_freq != iface->assoc_freq) { - wpa_printf(MSG_DEBUG, "Off-channel: Pending Action frame TX " - "waiting for another freq=%u (off_channel_freq=%u " - "assoc_freq=%u)", - wpa_s->pending_action_freq, - wpa_s->off_channel_freq, - iface->assoc_freq); - if (without_roc && wpa_s->off_channel_freq == 0) { - unsigned int duration = 200; - /* - * We may get here if wpas_send_action() found us to be - * on the correct channel, but remain-on-channel cancel - * event was received before getting here. - */ - wpa_printf(MSG_DEBUG, "Off-channel: Schedule " - "remain-on-channel to send Action frame"); -#ifdef CONFIG_TESTING_OPTIONS - if (wpa_s->extra_roc_dur) { - wpa_printf(MSG_DEBUG, - "TESTING: Increase ROC duration %u -> %u", - duration, - duration + wpa_s->extra_roc_dur); - duration += wpa_s->extra_roc_dur; - } -#endif /* CONFIG_TESTING_OPTIONS */ - if (wpa_drv_remain_on_channel( - wpa_s, wpa_s->pending_action_freq, - duration) < 0) { - wpa_printf(MSG_DEBUG, "Off-channel: Failed to " - "request driver to remain on " - "channel (%u MHz) for Action Frame " - "TX", wpa_s->pending_action_freq); - } else { - wpa_s->off_channel_freq = 0; - wpa_s->roc_waiting_drv_freq = - wpa_s->pending_action_freq; - } - } - return; - } - - wpa_printf(MSG_DEBUG, "Off-channel: Sending pending Action frame to " - MACSTR " using interface %s (pending_action_tx=%p)", - MAC2STR(wpa_s->pending_action_dst), iface->ifname, - wpa_s->pending_action_tx); - res = wpa_drv_send_action(iface, wpa_s->pending_action_freq, 0, - wpa_s->pending_action_dst, - wpa_s->pending_action_src, - wpa_s->pending_action_bssid, - wpabuf_head(wpa_s->pending_action_tx), - wpabuf_len(wpa_s->pending_action_tx), - wpa_s->pending_action_no_cck); - if (res) { - wpa_printf(MSG_DEBUG, "Off-channel: Failed to send the " - "pending Action frame"); - /* - * Use fake TX status event to allow state machines to - * continue. - */ - offchannel_send_action_tx_status( - wpa_s, wpa_s->pending_action_dst, - wpabuf_head(wpa_s->pending_action_tx), - wpabuf_len(wpa_s->pending_action_tx), - OFFCHANNEL_SEND_ACTION_FAILED); - } -} - - -/** - * offchannel_send_action_tx_status - TX status callback - * @wpa_s: Pointer to wpa_supplicant data - * @dst: Destination MAC address of the transmitted Action frame - * @data: Transmitted frame payload - * @data_len: Length of @data in bytes - * @result: TX status - * - * This function is called whenever the driver indicates a TX status event for - * a frame sent by offchannel_send_action() using wpa_drv_send_action(). - */ -void offchannel_send_action_tx_status( - struct wpa_supplicant *wpa_s, const u8 *dst, const u8 *data, - size_t data_len, enum offchannel_send_action_result result) -{ - if (wpa_s->pending_action_tx == NULL) { - wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " - "no pending operation"); - return; - } - - if (os_memcmp(dst, wpa_s->pending_action_dst, ETH_ALEN) != 0) { - wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " - "unknown destination address"); - return; - } - - /* Accept report only if the contents of the frame matches */ - if (data_len - wpabuf_len(wpa_s->pending_action_tx) != 24 || - os_memcmp(data + 24, wpabuf_head(wpa_s->pending_action_tx), - wpabuf_len(wpa_s->pending_action_tx)) != 0) { - wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " - "mismatching contents with pending frame"); - wpa_hexdump(MSG_MSGDUMP, "TX status frame data", - data, data_len); - wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", - wpa_s->pending_action_tx); - return; - } - - wpa_printf(MSG_DEBUG, - "Off-channel: Delete matching pending action frame (dst=" - MACSTR " pending_action_tx=%p)", MAC2STR(dst), - wpa_s->pending_action_tx); - wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", - wpa_s->pending_action_tx); - wpabuf_free(wpa_s->pending_action_tx); - wpa_s->pending_action_tx = NULL; - - wpa_printf(MSG_DEBUG, "Off-channel: TX status result=%d cb=%p", - result, wpa_s->pending_action_tx_status_cb); - - if (wpa_s->pending_action_tx_status_cb) { - wpa_s->pending_action_tx_status_cb( - wpa_s, wpa_s->pending_action_freq, - wpa_s->pending_action_dst, wpa_s->pending_action_src, - wpa_s->pending_action_bssid, - data, data_len, result); - } - -#ifdef CONFIG_P2P - if (wpa_s->global->p2p_long_listen > 0) { - /* Continue the listen */ - wpa_printf(MSG_DEBUG, "P2P: Continuing long Listen state"); - wpas_p2p_listen_start(wpa_s, wpa_s->global->p2p_long_listen); - } -#endif /* CONFIG_P2P */ -} - - -/** - * offchannel_send_action - Request off-channel Action frame TX - * @wpa_s: Pointer to wpa_supplicant data - * @freq: The frequency in MHz indicating the channel on which the frame is to - * transmitted or 0 for the current channel (only if associated) - * @dst: Action frame destination MAC address - * @src: Action frame source MAC address - * @bssid: Action frame BSSID - * @buf: Frame to transmit starting from the Category field - * @len: Length of @buf in bytes - * @wait_time: Wait time for response in milliseconds - * @tx_cb: Callback function for indicating TX status or %NULL for no callback - * @no_cck: Whether CCK rates are to be disallowed for TX rate selection - * Returns: 0 on success or -1 on failure - * - * This function is used to request an Action frame to be transmitted on the - * current operating channel or on another channel (off-channel). The actual - * frame transmission will be delayed until the driver is ready on the specified - * channel. The @wait_time parameter can be used to request the driver to remain - * awake on the channel to wait for a response. - */ -int offchannel_send_action(struct wpa_supplicant *wpa_s, unsigned int freq, - const u8 *dst, const u8 *src, const u8 *bssid, - const u8 *buf, size_t len, unsigned int wait_time, - void (*tx_cb)(struct wpa_supplicant *wpa_s, - unsigned int freq, const u8 *dst, - const u8 *src, const u8 *bssid, - const u8 *data, size_t data_len, - enum offchannel_send_action_result - result), - int no_cck) -{ - wpa_printf(MSG_DEBUG, "Off-channel: Send action frame: freq=%d dst=" - MACSTR " src=" MACSTR " bssid=" MACSTR " len=%d", - freq, MAC2STR(dst), MAC2STR(src), MAC2STR(bssid), - (int) len); - - wpa_s->pending_action_tx_status_cb = tx_cb; - - if (wpa_s->pending_action_tx) { - wpa_printf(MSG_DEBUG, "Off-channel: Dropped pending Action " - "frame TX to " MACSTR " (pending_action_tx=%p)", - MAC2STR(wpa_s->pending_action_dst), - wpa_s->pending_action_tx); - wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", - wpa_s->pending_action_tx); - wpabuf_free(wpa_s->pending_action_tx); - } - wpa_s->pending_action_tx_done = 0; - wpa_s->pending_action_tx = wpabuf_alloc(len); - if (wpa_s->pending_action_tx == NULL) { - wpa_printf(MSG_DEBUG, "Off-channel: Failed to allocate Action " - "frame TX buffer (len=%llu)", - (unsigned long long) len); - return -1; - } - wpabuf_put_data(wpa_s->pending_action_tx, buf, len); - os_memcpy(wpa_s->pending_action_src, src, ETH_ALEN); - os_memcpy(wpa_s->pending_action_dst, dst, ETH_ALEN); - os_memcpy(wpa_s->pending_action_bssid, bssid, ETH_ALEN); - wpa_s->pending_action_freq = freq; - wpa_s->pending_action_no_cck = no_cck; - wpa_printf(MSG_DEBUG, - "Off-channel: Stored pending action frame (dst=" MACSTR - " pending_action_tx=%p)", - MAC2STR(dst), wpa_s->pending_action_tx); - wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", - wpa_s->pending_action_tx); - - if (freq != 0 && wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) { - struct wpa_supplicant *iface; - int ret; - - iface = wpas_get_tx_interface(wpa_s, src); - wpa_s->action_tx_wait_time = wait_time; - if (wait_time) - wpa_s->action_tx_wait_time_used = 1; - - ret = wpa_drv_send_action( - iface, wpa_s->pending_action_freq, - wait_time, wpa_s->pending_action_dst, - wpa_s->pending_action_src, wpa_s->pending_action_bssid, - wpabuf_head(wpa_s->pending_action_tx), - wpabuf_len(wpa_s->pending_action_tx), - wpa_s->pending_action_no_cck); - if (ret == 0) - wpa_s->pending_action_tx_done = 1; - return ret; - } - - if (freq) { - struct wpa_supplicant *tx_iface; - tx_iface = wpas_get_tx_interface(wpa_s, src); - if (tx_iface->assoc_freq == freq) { - wpa_printf(MSG_DEBUG, "Off-channel: Already on " - "requested channel (TX interface operating " - "channel)"); - freq = 0; - } - } - - if (wpa_s->off_channel_freq == freq || freq == 0) { - wpa_printf(MSG_DEBUG, "Off-channel: Already on requested " - "channel; send Action frame immediately"); - /* TODO: Would there ever be need to extend the current - * duration on the channel? */ - wpa_s->pending_action_without_roc = 1; - eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL); - eloop_register_timeout(0, 0, wpas_send_action_cb, wpa_s, NULL); - return 0; - } - wpa_s->pending_action_without_roc = 0; - - if (wpa_s->roc_waiting_drv_freq == freq) { - wpa_printf(MSG_DEBUG, "Off-channel: Already waiting for " - "driver to get to frequency %u MHz; continue " - "waiting to send the Action frame", freq); - return 0; - } - - wpa_printf(MSG_DEBUG, "Off-channel: Schedule Action frame to be " - "transmitted once the driver gets to the requested " - "channel"); - if (wait_time > wpa_s->max_remain_on_chan) - wait_time = wpa_s->max_remain_on_chan; - else if (wait_time == 0) - wait_time = 20; -#ifdef CONFIG_TESTING_OPTIONS - if (wpa_s->extra_roc_dur) { - wpa_printf(MSG_DEBUG, "TESTING: Increase ROC duration %u -> %u", - wait_time, wait_time + wpa_s->extra_roc_dur); - wait_time += wpa_s->extra_roc_dur; - } -#endif /* CONFIG_TESTING_OPTIONS */ - if (wpa_drv_remain_on_channel(wpa_s, freq, wait_time) < 0) { - wpa_printf(MSG_DEBUG, "Off-channel: Failed to request driver " - "to remain on channel (%u MHz) for Action " - "Frame TX", freq); - return -1; - } - wpa_s->off_channel_freq = 0; - wpa_s->roc_waiting_drv_freq = freq; - - return 0; -} - - -/** - * offchannel_send_send_action_done - Notify completion of Action frame sequence - * @wpa_s: Pointer to wpa_supplicant data - * - * This function can be used to cancel a wait for additional response frames on - * the channel that was used with offchannel_send_action(). - */ -void offchannel_send_action_done(struct wpa_supplicant *wpa_s) -{ - wpa_printf(MSG_DEBUG, - "Off-channel: Action frame sequence done notification: pending_action_tx=%p drv_offchan_tx=%d action_tx_wait_time=%d off_channel_freq=%d roc_waiting_drv_freq=%d", - wpa_s->pending_action_tx, - !!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX), - wpa_s->action_tx_wait_time, wpa_s->off_channel_freq, - wpa_s->roc_waiting_drv_freq); - wpabuf_free(wpa_s->pending_action_tx); - wpa_s->pending_action_tx = NULL; - if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX && - (wpa_s->action_tx_wait_time || wpa_s->action_tx_wait_time_used)) - wpa_drv_send_action_cancel_wait(wpa_s); - else if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) { - wpa_drv_cancel_remain_on_channel(wpa_s); - wpa_s->off_channel_freq = 0; - wpa_s->roc_waiting_drv_freq = 0; - } - wpa_s->action_tx_wait_time_used = 0; -} - - -/** - * offchannel_remain_on_channel_cb - Remain-on-channel callback function - * @wpa_s: Pointer to wpa_supplicant data - * @freq: Frequency (in MHz) of the selected channel - * @duration: Duration of the remain-on-channel operation in milliseconds - * - * This function is called whenever the driver notifies beginning of a - * remain-on-channel operation. - */ -void offchannel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, - unsigned int freq, unsigned int duration) -{ - wpa_s->roc_waiting_drv_freq = 0; - wpa_s->off_channel_freq = freq; - wpas_send_action_cb(wpa_s, NULL); -} - - -/** - * offchannel_cancel_remain_on_channel_cb - Remain-on-channel stopped callback - * @wpa_s: Pointer to wpa_supplicant data - * @freq: Frequency (in MHz) of the selected channel - * - * This function is called whenever the driver notifies termination of a - * remain-on-channel operation. - */ -void offchannel_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, - unsigned int freq) -{ - wpa_s->off_channel_freq = 0; -} - - -/** - * offchannel_pending_action_tx - Check whether there is a pending Action TX - * @wpa_s: Pointer to wpa_supplicant data - * Returns: Pointer to pending frame or %NULL if no pending operation - * - * This function can be used to check whether there is a pending Action frame TX - * operation. The returned pointer should be used only for checking whether it - * is %NULL (no pending frame) or to print the pointer value in debug - * information (i.e., the pointer should not be dereferenced). - */ -const void * offchannel_pending_action_tx(struct wpa_supplicant *wpa_s) -{ - return wpa_s->pending_action_tx; -} - - -/** - * offchannel_clear_pending_action_tx - Clear pending Action frame TX - * @wpa_s: Pointer to wpa_supplicant data - */ -void offchannel_clear_pending_action_tx(struct wpa_supplicant *wpa_s) -{ - wpa_printf(MSG_DEBUG, - "Off-channel: Clear pending Action frame TX (pending_action_tx=%p", - wpa_s->pending_action_tx); - wpabuf_free(wpa_s->pending_action_tx); - wpa_s->pending_action_tx = NULL; -} - - -/** - * offchannel_deinit - Deinit off-channel operations - * @wpa_s: Pointer to wpa_supplicant data - * - * This function is used to free up any allocated resources for off-channel - * operations. - */ -void offchannel_deinit(struct wpa_supplicant *wpa_s) -{ - offchannel_clear_pending_action_tx(wpa_s); - eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL); -} |