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freebsd-skq/sys/net80211/ieee80211_scan.c
adrian ab03e99258 Refactor and split out the net80211 software scan engine from the rest 
of the scan API.

The eventual aim is to have 'ieee80211_scan.c' have the net80211 and
driver facing scan API to start, finish and continue doing scanning
while 'ieee80211_swscan.c' implements the software scanner that
runs the scan task, handles probe request/reply bits, configures
the VAP off-channel, changes channel and does the scanning bits.

For NICs that do no scanning at all, the existing code is needed.
ath(4) and most of the other NICs (dumb USB ones in particular)
do little to no scan offload - it's all done in software.

Some NICs may do single channel at a time scanning; I haven't really
checked them out in detail.

iwn(4), the upcoming 7260 driver stuff, the new Qualcomm Atheros
11ac chipsets and the Atheros mobile/USB full-offload chips all
have complete scan engines in firmware.  We don't have to drive
any of it at all - the firmware just needs to be told what to scan,
when to scan, how long to scan.  It'll take care of going off
channel, pausing TX/RX appropriately, sending sleep notification
to the AP, sending probe requests and handling probe responses.
It'll do passive/active scan itself.  It's almost completely
transparent to the network stack - all we see are scan notifications
when it finishes scanning each channel and beacons/probe responses
when it does its thing.  Once it's done we get a final notification
that the scan is complete, with some scan results in the message.
The iwn(4) NICs handle doing active scanning too as an option
and will handle waiting appropriately on 5GHz passive channels
before active scanning.

There's some more refactoring, tidying up and lock assertions to
sprinkle around to tidy this whole thing up before I turn swscan.c
into another set of ic methods to override by the driver or
alternate scan module.  So in theory this is all one big no-op
commit.  In theory.

Tested:

* iwn(4) 5200, STA mode
* ath(4) 6205, STA mode
* ath(4) - various NICs, AP mode
2015-01-06 02:08:45 +00:00

764 lines
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/*-
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* IEEE 802.11 scanning support.
*/
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/condvar.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
/* XXX until it's implemented as attach ops */
#include <net80211/ieee80211_scan_sw.h>
#include <net/bpf.h>
/*
* Roaming-related defaults. RSSI thresholds are as returned by the
* driver (.5dBm). Transmit rate thresholds are IEEE rate codes (i.e
* .5M units) or MCS.
*/
/* rssi thresholds */
#define ROAM_RSSI_11A_DEFAULT 14 /* 11a bss */
#define ROAM_RSSI_11B_DEFAULT 14 /* 11b bss */
#define ROAM_RSSI_11BONLY_DEFAULT 14 /* 11b-only bss */
/* transmit rate thresholds */
#define ROAM_RATE_11A_DEFAULT 2*12 /* 11a bss */
#define ROAM_RATE_11B_DEFAULT 2*5 /* 11b bss */
#define ROAM_RATE_11BONLY_DEFAULT 2*1 /* 11b-only bss */
#define ROAM_RATE_HALF_DEFAULT 2*6 /* half-width 11a/g bss */
#define ROAM_RATE_QUARTER_DEFAULT 2*3 /* quarter-width 11a/g bss */
#define ROAM_MCS_11N_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11n bss */
void
ieee80211_scan_attach(struct ieee80211com *ic)
{
/*
* For now, the swscan module does both the
* allocation (so it can pad it) and sets up the net80211
* bits.
*
* I'll split this stuff later.
*/
ieee80211_swscan_attach(ic);
}
void
ieee80211_scan_detach(struct ieee80211com *ic)
{
/*
* Ideally we'd do the ss_ops detach call here;
* but then ieee80211_swscan_detach would need
* to be split in two.
*
* I'll do that later.
*/
ieee80211_swscan_detach(ic);
}
static const struct ieee80211_roamparam defroam[IEEE80211_MODE_MAX] = {
[IEEE80211_MODE_11A] = { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_11A_DEFAULT },
[IEEE80211_MODE_11G] = { .rssi = ROAM_RSSI_11B_DEFAULT,
.rate = ROAM_RATE_11B_DEFAULT },
[IEEE80211_MODE_11B] = { .rssi = ROAM_RSSI_11BONLY_DEFAULT,
.rate = ROAM_RATE_11BONLY_DEFAULT },
[IEEE80211_MODE_TURBO_A]= { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_11A_DEFAULT },
[IEEE80211_MODE_TURBO_G]= { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_11A_DEFAULT },
[IEEE80211_MODE_STURBO_A]={ .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_11A_DEFAULT },
[IEEE80211_MODE_HALF] = { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_HALF_DEFAULT },
[IEEE80211_MODE_QUARTER]= { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_RATE_QUARTER_DEFAULT },
[IEEE80211_MODE_11NA] = { .rssi = ROAM_RSSI_11A_DEFAULT,
.rate = ROAM_MCS_11N_DEFAULT },
[IEEE80211_MODE_11NG] = { .rssi = ROAM_RSSI_11B_DEFAULT,
.rate = ROAM_MCS_11N_DEFAULT },
};
void
ieee80211_scan_vattach(struct ieee80211vap *vap)
{
vap->iv_bgscanidle = (IEEE80211_BGSCAN_IDLE_DEFAULT*1000)/hz;
vap->iv_bgscanintvl = IEEE80211_BGSCAN_INTVAL_DEFAULT*hz;
vap->iv_scanvalid = IEEE80211_SCAN_VALID_DEFAULT*hz;
vap->iv_roaming = IEEE80211_ROAMING_AUTO;
memcpy(vap->iv_roamparms, defroam, sizeof(defroam));
ieee80211_swscan_vattach(vap);
}
void
ieee80211_scan_vdetach(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss;
IEEE80211_LOCK(ic);
ss = ic->ic_scan;
ieee80211_swscan_vdetach(vap);
if (ss != NULL && ss->ss_vap == vap) {
if (ss->ss_ops != NULL) {
ss->ss_ops->scan_detach(ss);
ss->ss_ops = NULL;
}
ss->ss_vap = NULL;
}
IEEE80211_UNLOCK(ic);
}
/*
* Simple-minded scanner module support.
*/
static const char *scan_modnames[IEEE80211_OPMODE_MAX] = {
"wlan_scan_sta", /* IEEE80211_M_IBSS */
"wlan_scan_sta", /* IEEE80211_M_STA */
"wlan_scan_wds", /* IEEE80211_M_WDS */
"wlan_scan_sta", /* IEEE80211_M_AHDEMO */
"wlan_scan_ap", /* IEEE80211_M_HOSTAP */
"wlan_scan_monitor", /* IEEE80211_M_MONITOR */
"wlan_scan_sta", /* IEEE80211_M_MBSS */
};
static const struct ieee80211_scanner *scanners[IEEE80211_OPMODE_MAX];
const struct ieee80211_scanner *
ieee80211_scanner_get(enum ieee80211_opmode mode)
{
if (mode >= IEEE80211_OPMODE_MAX)
return NULL;
if (scanners[mode] == NULL)
ieee80211_load_module(scan_modnames[mode]);
return scanners[mode];
}
void
ieee80211_scanner_register(enum ieee80211_opmode mode,
const struct ieee80211_scanner *scan)
{
if (mode >= IEEE80211_OPMODE_MAX)
return;
scanners[mode] = scan;
}
void
ieee80211_scanner_unregister(enum ieee80211_opmode mode,
const struct ieee80211_scanner *scan)
{
if (mode >= IEEE80211_OPMODE_MAX)
return;
if (scanners[mode] == scan)
scanners[mode] = NULL;
}
void
ieee80211_scanner_unregister_all(const struct ieee80211_scanner *scan)
{
int m;
for (m = 0; m < IEEE80211_OPMODE_MAX; m++)
if (scanners[m] == scan)
scanners[m] = NULL;
}
/*
* Update common scanner state to reflect the current
* operating mode. This is called when the state machine
* is transitioned to RUN state w/o scanning--e.g. when
* operating in monitor mode. The purpose of this is to
* ensure later callbacks find ss_ops set to properly
* reflect current operating mode.
*/
void
ieee80211_scan_update_locked(struct ieee80211vap *vap,
const struct ieee80211_scanner *scan)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic);
#ifdef IEEE80211_DEBUG
if (ss->ss_vap != vap || ss->ss_ops != scan) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: current scanner is <%s:%s>, switch to <%s:%s>\n",
__func__,
ss->ss_vap != NULL ?
ss->ss_vap->iv_ifp->if_xname : "none",
ss->ss_vap != NULL ?
ieee80211_opmode_name[ss->ss_vap->iv_opmode] : "none",
vap->iv_ifp->if_xname,
ieee80211_opmode_name[vap->iv_opmode]);
}
#endif
ss->ss_vap = vap;
if (ss->ss_ops != scan) {
/*
* Switch scanners; detach old, attach new. Special
* case where a single scan module implements multiple
* policies by using different scan ops but a common
* core. We assume if the old and new attach methods
* are identical then it's ok to just change ss_ops
* and not flush the internal state of the module.
*/
if (scan == NULL || ss->ss_ops == NULL ||
ss->ss_ops->scan_attach != scan->scan_attach) {
if (ss->ss_ops != NULL)
ss->ss_ops->scan_detach(ss);
if (scan != NULL && !scan->scan_attach(ss)) {
/* XXX attach failure */
/* XXX stat+msg */
scan = NULL;
}
}
ss->ss_ops = scan;
}
}
/*
* XXX TODO: should be a global method!
*/
static char
channel_type(const struct ieee80211_channel *c)
{
if (IEEE80211_IS_CHAN_ST(c))
return 'S';
if (IEEE80211_IS_CHAN_108A(c))
return 'T';
if (IEEE80211_IS_CHAN_108G(c))
return 'G';
if (IEEE80211_IS_CHAN_HT(c))
return 'n';
if (IEEE80211_IS_CHAN_A(c))
return 'a';
if (IEEE80211_IS_CHAN_ANYG(c))
return 'g';
if (IEEE80211_IS_CHAN_B(c))
return 'b';
return 'f';
}
void
ieee80211_scan_dump_channels(const struct ieee80211_scan_state *ss)
{
struct ieee80211com *ic = ss->ss_ic;
const char *sep;
int i;
sep = "";
for (i = ss->ss_next; i < ss->ss_last; i++) {
const struct ieee80211_channel *c = ss->ss_chans[i];
printf("%s%u%c", sep, ieee80211_chan2ieee(ic, c),
channel_type(c));
sep = ", ";
}
}
#ifdef IEEE80211_DEBUG
void
ieee80211_scan_dump(struct ieee80211_scan_state *ss)
{
struct ieee80211vap *vap = ss->ss_vap;
if_printf(vap->iv_ifp, "scan set ");
ieee80211_scan_dump_channels(ss);
printf(" dwell min %lums max %lums\n",
ticks_to_msecs(ss->ss_mindwell), ticks_to_msecs(ss->ss_maxdwell));
}
#endif /* IEEE80211_DEBUG */
void
ieee80211_scan_copy_ssid(struct ieee80211vap *vap, struct ieee80211_scan_state *ss,
int nssid, const struct ieee80211_scan_ssid ssids[])
{
if (nssid > IEEE80211_SCAN_MAX_SSID) {
/* XXX printf */
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: too many ssid %d, ignoring all of them\n",
__func__, nssid);
return;
}
memcpy(ss->ss_ssid, ssids, nssid * sizeof(ssids[0]));
ss->ss_nssid = nssid;
}
/*
* Start a scan unless one is already going.
*/
int
ieee80211_start_scan_locked(const struct ieee80211_scanner *scan,
struct ieee80211vap *vap, int flags, u_int duration,
u_int mindwell, u_int maxdwell,
u_int nssid, const struct ieee80211_scan_ssid ssids[])
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic);
if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: scan inhibited by pending channel change\n", __func__);
} else if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan, duration %u mindwell %u maxdwell %u, desired mode %s, %s%s%s%s%s%s\n"
, __func__
, flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive"
, duration, mindwell, maxdwell
, ieee80211_phymode_name[vap->iv_des_mode]
, flags & IEEE80211_SCAN_FLUSH ? "flush" : "append"
, flags & IEEE80211_SCAN_NOPICK ? ", nopick" : ""
, flags & IEEE80211_SCAN_NOJOIN ? ", nojoin" : ""
, flags & IEEE80211_SCAN_NOBCAST ? ", nobcast" : ""
, flags & IEEE80211_SCAN_PICK1ST ? ", pick1st" : ""
, flags & IEEE80211_SCAN_ONCE ? ", once" : ""
);
ieee80211_scan_update_locked(vap, scan);
if (ss->ss_ops != NULL) {
if ((flags & IEEE80211_SCAN_NOSSID) == 0)
ieee80211_scan_copy_ssid(vap, ss, nssid, ssids);
/* NB: top 4 bits for internal use */
ss->ss_flags = flags & 0xfff;
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
vap->iv_stats.is_scan_active++;
else
vap->iv_stats.is_scan_passive++;
if (flags & IEEE80211_SCAN_FLUSH)
ss->ss_ops->scan_flush(ss);
if (flags & IEEE80211_SCAN_BGSCAN)
ic->ic_flags_ext |= IEEE80211_FEXT_BGSCAN;
/* Set duration for this particular scan */
ieee80211_swscan_set_scan_duration(vap, duration);
ss->ss_next = 0;
ss->ss_mindwell = mindwell;
ss->ss_maxdwell = maxdwell;
/* NB: scan_start must be before the scan runtask */
ss->ss_ops->scan_start(ss, vap);
#ifdef IEEE80211_DEBUG
if (ieee80211_msg_scan(vap))
ieee80211_scan_dump(ss);
#endif /* IEEE80211_DEBUG */
ic->ic_flags |= IEEE80211_F_SCAN;
/* Start scan task */
ieee80211_swscan_run_scan_task(vap);
}
return 1;
} else {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan already in progress\n", __func__,
ss->ss_flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive");
}
return 0;
}
/*
* Start a scan unless one is already going.
*/
int
ieee80211_start_scan(struct ieee80211vap *vap, int flags,
u_int duration, u_int mindwell, u_int maxdwell,
u_int nssid, const struct ieee80211_scan_ssid ssids[])
{
const struct ieee80211_scanner *scan;
scan = ieee80211_scanner_get(vap->iv_opmode);
if (scan == NULL) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: no scanner support for %s mode\n",
__func__, ieee80211_opmode_name[vap->iv_opmode]);
/* XXX stat */
return 0;
}
/* XXX ops */
return ieee80211_swscan_start_scan(scan, vap, flags, duration,
mindwell, maxdwell, nssid, ssids);
}
/*
* Check the scan cache for an ap/channel to use; if that
* fails then kick off a new scan.
*/
int
ieee80211_check_scan(struct ieee80211vap *vap, int flags,
u_int duration, u_int mindwell, u_int maxdwell,
u_int nssid, const struct ieee80211_scan_ssid ssids[])
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
const struct ieee80211_scanner *scan;
int result;
scan = ieee80211_scanner_get(vap->iv_opmode);
if (scan == NULL) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: no scanner support for %s mode\n",
__func__, vap->iv_opmode);
/* XXX stat */
return 0;
}
/*
* Check if there's a list of scan candidates already.
* XXX want more than the ap we're currently associated with
*/
IEEE80211_LOCK(ic);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s scan, %s%s%s%s%s\n"
, __func__
, flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive"
, flags & IEEE80211_SCAN_FLUSH ? "flush" : "append"
, flags & IEEE80211_SCAN_NOPICK ? ", nopick" : ""
, flags & IEEE80211_SCAN_NOJOIN ? ", nojoin" : ""
, flags & IEEE80211_SCAN_PICK1ST ? ", pick1st" : ""
, flags & IEEE80211_SCAN_ONCE ? ", once" : ""
);
if (ss->ss_ops != scan) {
/* XXX re-use cache contents? e.g. adhoc<->sta */
flags |= IEEE80211_SCAN_FLUSH;
}
/*
* XXX TODO: separate things out a bit better.
* XXX TODO: ops
*/
ieee80211_scan_update_locked(vap, scan);
result = ieee80211_swscan_check_scan(scan, vap, flags, duration,
mindwell, maxdwell, nssid, ssids);
IEEE80211_UNLOCK(ic);
return (result);
}
/*
* Check the scan cache for an ap/channel to use; if that fails
* then kick off a scan using the current settings.
*/
int
ieee80211_check_scan_current(struct ieee80211vap *vap)
{
return ieee80211_check_scan(vap,
IEEE80211_SCAN_ACTIVE,
IEEE80211_SCAN_FOREVER, 0, 0,
vap->iv_des_nssid, vap->iv_des_ssid);
}
/*
* Restart a previous scan. If the previous scan completed
* then we start again using the existing channel list.
*/
int
ieee80211_bg_scan(struct ieee80211vap *vap, int flags)
{
const struct ieee80211_scanner *scan;
// IEEE80211_UNLOCK_ASSERT(sc);
scan = ieee80211_scanner_get(vap->iv_opmode);
if (scan == NULL) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: no scanner support for %s mode\n",
__func__, vap->iv_opmode);
/* XXX stat */
return 0;
}
/*
* XXX TODO: pull apart the bgscan logic into whatever
* belongs here and whatever belongs in the software
* scanner.
*
* XXX TODO: ops
*/
return (ieee80211_swscan_bg_scan(scan, vap, flags));
}
/*
* Cancel any scan currently going on for the specified vap.
*/
void
ieee80211_cancel_scan(struct ieee80211vap *vap)
{
/* XXX TODO: ops */
ieee80211_swscan_cancel_scan(vap);
}
/*
* Cancel any scan currently going on.
*/
void
ieee80211_cancel_anyscan(struct ieee80211vap *vap)
{
/* XXX TODO: ops */
ieee80211_swscan_cancel_anyscan(vap);
}
/*
* Public access to scan_next for drivers that manage
* scanning themselves (e.g. for firmware-based devices).
*/
void
ieee80211_scan_next(struct ieee80211vap *vap)
{
/* XXX TODO: ops */
ieee80211_swscan_scan_next(vap);
}
/*
* Public access to scan_next for drivers that are not able to scan single
* channels (e.g. for firmware-based devices).
*/
void
ieee80211_scan_done(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__);
IEEE80211_LOCK(ic);
ss = ic->ic_scan;
ss->ss_next = ss->ss_last; /* all channels are complete */
/* XXX TODO: ops */
ieee80211_swscan_scan_done(vap);
IEEE80211_UNLOCK(ic);
}
/*
* Probe the curent channel, if allowed, while scanning.
* If the channel is not marked passive-only then send
* a probe request immediately. Otherwise mark state and
* listen for beacons on the channel; if we receive something
* then we'll transmit a probe request.
*/
void
ieee80211_probe_curchan(struct ieee80211vap *vap, int force)
{
struct ieee80211com *ic = vap->iv_ic;
if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) && !force) {
ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN;
return;
}
/* XXX TODO: ops */
ieee80211_swscan_probe_curchan(vap, force);
}
#ifdef IEEE80211_DEBUG
static void
dump_country(const uint8_t *ie)
{
const struct ieee80211_country_ie *cie =
(const struct ieee80211_country_ie *) ie;
int i, nbands, schan, nchan;
if (cie->len < 3) {
printf(" <bogus country ie, len %d>", cie->len);
return;
}
printf(" country [%c%c%c", cie->cc[0], cie->cc[1], cie->cc[2]);
nbands = (cie->len - 3) / sizeof(cie->band[0]);
for (i = 0; i < nbands; i++) {
schan = cie->band[i].schan;
nchan = cie->band[i].nchan;
if (nchan != 1)
printf(" %u-%u,%u", schan, schan + nchan-1,
cie->band[i].maxtxpwr);
else
printf(" %u,%u", schan, cie->band[i].maxtxpwr);
}
printf("]");
}
void
ieee80211_scan_dump_probe_beacon(uint8_t subtype, int isnew,
const uint8_t mac[IEEE80211_ADDR_LEN],
const struct ieee80211_scanparams *sp, int rssi)
{
printf("[%s] %s%s on chan %u (bss chan %u) ",
ether_sprintf(mac), isnew ? "new " : "",
ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT],
sp->chan, sp->bchan);
ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]);
printf(" rssi %d\n", rssi);
if (isnew) {
printf("[%s] caps 0x%x bintval %u erp 0x%x",
ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp);
if (sp->country != NULL)
dump_country(sp->country);
printf("\n");
}
}
#endif /* IEEE80211_DEBUG */
/*
* Process a beacon or probe response frame.
*/
void
ieee80211_add_scan(struct ieee80211vap *vap,
const struct ieee80211_scanparams *sp,
const struct ieee80211_frame *wh,
int subtype, int rssi, int noise)
{
return (ieee80211_swscan_add_scan(vap, sp, wh, subtype, rssi, noise));
}
/*
* Timeout/age scan cache entries; called from sta timeout
* timer (XXX should be self-contained).
*/
void
ieee80211_scan_timeout(struct ieee80211com *ic)
{
struct ieee80211_scan_state *ss = ic->ic_scan;
if (ss->ss_ops != NULL)
ss->ss_ops->scan_age(ss);
}
/*
* Mark a scan cache entry after a successful associate.
*/
void
ieee80211_scan_assoc_success(struct ieee80211vap *vap, const uint8_t mac[])
{
struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
if (ss->ss_ops != NULL) {
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN,
mac, "%s", __func__);
ss->ss_ops->scan_assoc_success(ss, mac);
}
}
/*
* Demerit a scan cache entry after failing to associate.
*/
void
ieee80211_scan_assoc_fail(struct ieee80211vap *vap,
const uint8_t mac[], int reason)
{
struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
if (ss->ss_ops != NULL) {
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN, mac,
"%s: reason %u", __func__, reason);
ss->ss_ops->scan_assoc_fail(ss, mac, reason);
}
}
/*
* Iterate over the contents of the scan cache.
*/
void
ieee80211_scan_iterate(struct ieee80211vap *vap,
ieee80211_scan_iter_func *f, void *arg)
{
struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
if (ss->ss_ops != NULL)
ss->ss_ops->scan_iterate(ss, f, arg);
}
/*
* Flush the contents of the scan cache.
*/
void
ieee80211_scan_flush(struct ieee80211vap *vap)
{
struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
if (ss->ss_ops != NULL && ss->ss_vap == vap) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", __func__);
ss->ss_ops->scan_flush(ss);
}
}
/*
* Check the scan cache for an ap/channel to use; if that
* fails then kick off a new scan.
*/
struct ieee80211_channel *
ieee80211_scan_pickchannel(struct ieee80211com *ic, int flags)
{
struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic);
if (ss == NULL || ss->ss_ops == NULL || ss->ss_vap == NULL) {
/* XXX printf? */
return NULL;
}
if (ss->ss_ops->scan_pickchan == NULL) {
IEEE80211_DPRINTF(ss->ss_vap, IEEE80211_MSG_SCAN,
"%s: scan module does not support picking a channel, "
"opmode %s\n", __func__, ss->ss_vap->iv_opmode);
return NULL;
}
return ss->ss_ops->scan_pickchan(ss, flags);
}
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