/*
* Set the current phy mode and recalculate the active channel
* set based on the available channels for this mode. Also
* select a new default/current channel if the current one is
* inappropriate for this mode.
*/
int
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const u_int chanflags[] = {
0, /* IEEE80211_MODE_AUTO */
IEEE80211_CHAN_A, /* IEEE80211_MODE_11A */
IEEE80211_CHAN_B, /* IEEE80211_MODE_11B */
IEEE80211_CHAN_PUREG, /* IEEE80211_MODE_11G */
IEEE80211_CHAN_FHSS, /* IEEE80211_MODE_FH */
IEEE80211_CHAN_T, /* IEEE80211_MODE_TURBO */
};
struct ieee80211_channel *c;
u_int modeflags;
int i;
/* validate new mode */
if ((ic->ic_modecaps & (1<<mode)) == 0) {
IEEE80211_DPRINTF(("%s: mode %u not supported (caps 0x%x)\n",
__func__, mode, ic->ic_modecaps));
return EINVAL;
}
/*
* Verify at least one channel is present in the available
* channel list before committing to the new mode.
*/
IASSERT(mode < N(chanflags), ("Unexpected mode %u", mode));
modeflags = chanflags[mode];
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (mode == IEEE80211_MODE_AUTO) {
/* ignore turbo channels for autoselect */
if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
break;
} else {
if ((c->ic_flags & modeflags) == modeflags)
break;
}
}
if (i > IEEE80211_CHAN_MAX) {
IEEE80211_DPRINTF(("%s: no channels found for mode %u\n",
__func__, mode));
return EINVAL;
}
/*
* Calculate the active channel set.
*/
memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active));
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (mode == IEEE80211_MODE_AUTO) {
/* take anything but pure turbo channels */
if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
setbit(ic->ic_chan_active, i);
} else {
if ((c->ic_flags & modeflags) == modeflags)
setbit(ic->ic_chan_active, i);
}
}
/*
* If no current/default channel is setup or the current
* channel is wrong for the mode then pick the first
* available channel from the active list. This is likely
* not the right one.
*/
if (ic->ic_ibss_chan == NULL ||
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
if (isset(ic->ic_chan_active, i)) {
ic->ic_ibss_chan = &ic->ic_channels[i];
break;
}
IASSERT(ic->ic_ibss_chan != NULL &&
isset(ic->ic_chan_active,
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)),
("Bad IBSS channel %u\n",
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)));
}
/*
* Set/reset state flags that influence beacon contents, etc.
*
* XXX what if we have stations already associated???
* XXX probably not right for autoselect?
*/
if (ic->ic_caps & IEEE80211_C_SHPREAMBLE)
ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
if (mode == IEEE80211_MODE_11G) {
if (ic->ic_caps & IEEE80211_C_SHSLOT)
ic->ic_flags |= IEEE80211_F_SHSLOT;
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
IEEE80211_MODE_11G);
} else {
ic->ic_flags &= ~IEEE80211_F_SHSLOT;
}
ic->ic_curmode = mode;
return 0;
#undef N
}
/*
* Set the current phy mode and recalculate the active channel
* set based on the available channels for this mode. Also
* select a new default/current channel if the current one is
* inappropriate for this mode.
*/
int
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const u_int chanflags[] = {
0, /* IEEE80211_MODE_AUTO */
IEEE80211_CHAN_A, /* IEEE80211_MODE_11A */
IEEE80211_CHAN_B, /* IEEE80211_MODE_11B */
IEEE80211_CHAN_PUREG, /* IEEE80211_MODE_11G */
IEEE80211_CHAN_FHSS, /* IEEE80211_MODE_FH */
IEEE80211_CHAN_T, /* IEEE80211_MODE_TURBO_A */
IEEE80211_CHAN_108G, /* IEEE80211_MODE_TURBO_G */
};
struct ieee80211_channel *c;
u_int modeflags;
int i;
/* validate new mode */
if ((ic->ic_modecaps & (1<<mode)) == 0) {
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
"%s: mode %u not supported (caps 0x%x)\n",
__func__, mode, ic->ic_modecaps);
return EINVAL;
}
/*
* Verify at least one channel is present in the available
* channel list before committing to the new mode.
*/
IASSERT(mode < N(chanflags), ("Unexpected mode %u", mode));
modeflags = chanflags[mode];
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (c->ic_flags == 0)
continue;
if (mode == IEEE80211_MODE_AUTO) {
/* ignore turbo channels for autoselect */
if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0)
break;
} else {
if ((c->ic_flags & modeflags) == modeflags)
break;
}
}
if (i > IEEE80211_CHAN_MAX) {
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
"%s: no channels found for mode %u\n", __func__, mode);
return EINVAL;
}
/*
* Calculate the active channel set.
*/
memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active));
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (c->ic_flags == 0)
continue;
if (mode == IEEE80211_MODE_AUTO) {
/* take anything but pure turbo channels */
if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0)
setbit(ic->ic_chan_active, i);
} else {
if ((c->ic_flags & modeflags) == modeflags)
setbit(ic->ic_chan_active, i);
}
}
/*
* If no current/default channel is setup or the current
* channel is wrong for the mode then pick the first
* available channel from the active list. This is likely
* not the right one.
*/
if (ic->ic_ibss_chan == NULL ||
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
if (isset(ic->ic_chan_active, i)) {
ic->ic_ibss_chan = &ic->ic_channels[i];
break;
}
IASSERT(ic->ic_ibss_chan != NULL &&
isset(ic->ic_chan_active,
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)),
("Bad IBSS channel %u",
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)));
}
/*
* If the desired channel is set but no longer valid then reset it.
*/
if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_des_chan)))
ic->ic_des_chan = IEEE80211_CHAN_ANYC;
/*
* Do mode-specific rate setup.
*/
if (mode == IEEE80211_MODE_11G) {
/*
* Use a mixed 11b/11g rate set.
*/
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
IEEE80211_MODE_11G);
} else if (mode == IEEE80211_MODE_11B) {
/*
* Force pure 11b rate set.
*/
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
IEEE80211_MODE_11B);
}
/*
* Setup an initial rate set according to the
* current/default channel selected above. This
* will be changed when scanning but must exist
* now so driver have a consistent state of ic_ibss_chan.
*/
if (ic->ic_bss) /* NB: can be called before lateattach */
ic->ic_bss->ni_rates = ic->ic_sup_rates[mode];
ic->ic_curmode = mode;
ieee80211_reset_erp(ic); /* reset ERP state */
ieee80211_wme_initparams(ic); /* reset WME stat */
return 0;
#undef N
}
/*
* Handle a media change request.
*/
int
ieee80211_media_change(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ifmedia_entry *ime;
enum ieee80211_opmode newopmode;
enum ieee80211_phymode newphymode;
int i, j, newrate, error = 0;
ime = ic->ic_media.ifm_cur;
/*
* First, identify the phy mode.
*/
switch (IFM_MODE(ime->ifm_media)) {
case IFM_IEEE80211_11A:
newphymode = IEEE80211_MODE_11A;
break;
case IFM_IEEE80211_11B:
newphymode = IEEE80211_MODE_11B;
break;
case IFM_IEEE80211_11G:
newphymode = IEEE80211_MODE_11G;
break;
case IFM_IEEE80211_FH:
newphymode = IEEE80211_MODE_FH;
break;
case IFM_AUTO:
newphymode = IEEE80211_MODE_AUTO;
break;
default:
return EINVAL;
}
/*
* Turbo mode is an ``option''. Eventually it
* needs to be applied to 11g too.
*/
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
if (newphymode != IEEE80211_MODE_11A)
return EINVAL;
newphymode = IEEE80211_MODE_TURBO;
}
/*
* Validate requested mode is available.
*/
if ((ic->ic_modecaps & (1<<newphymode)) == 0)
return EINVAL;
/*
* Next, the fixed/variable rate.
*/
i = -1;
if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
/*
* Convert media subtype to rate.
*/
newrate = ieee80211_media2rate(ime->ifm_media);
if (newrate == 0)
return EINVAL;
/*
* Check the rate table for the specified/current phy.
*/
if (newphymode == IEEE80211_MODE_AUTO) {
/*
* In autoselect mode search for the rate.
*/
for (j = IEEE80211_MODE_11A;
j < IEEE80211_MODE_MAX; j++) {
if ((ic->ic_modecaps & (1<<j)) == 0)
continue;
i = findrate(ic, j, newrate);
if (i != -1) {
/* lock mode too */
newphymode = j;
break;
}
}
} else {
i = findrate(ic, newphymode, newrate);
}
if (i == -1) /* mode/rate mismatch */
return EINVAL;
}
/* NB: defer rate setting to later */
/*
* Deduce new operating mode but don't install it just yet.
*/
if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
(IFM_IEEE80211_ADHOC|IFM_FLAG0))
newopmode = IEEE80211_M_AHDEMO;
else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
newopmode = IEEE80211_M_HOSTAP;
else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
newopmode = IEEE80211_M_IBSS;
else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
newopmode = IEEE80211_M_MONITOR;
else
newopmode = IEEE80211_M_STA;
/*
* Autoselect doesn't make sense when operating as an AP.
* If no phy mode has been selected, pick one and lock it
* down so rate tables can be used in forming beacon frames
* and the like.
*/
if (newopmode == IEEE80211_M_HOSTAP &&
newphymode == IEEE80211_MODE_AUTO) {
for (j = IEEE80211_MODE_11A; j < IEEE80211_MODE_MAX; j++)
if (ic->ic_modecaps & (1<<j)) {
newphymode = j;
break;
}
}
/*
* Handle phy mode change.
*/
if (ic->ic_curmode != newphymode) { /* change phy mode */
error = ieee80211_setmode(ic, newphymode);
if (error != 0)
return error;
error = ENETRESET;
}
/*
* Committed to changes, install the rate setting.
*/
if (ic->ic_fixed_rate != i) {
ic->ic_fixed_rate = i; /* set fixed tx rate */
error = ENETRESET;
}
/*
* Handle operating mode change.
*/
if (ic->ic_opmode != newopmode) {
ic->ic_opmode = newopmode;
switch (newopmode) {
case IEEE80211_M_AHDEMO:
case IEEE80211_M_HOSTAP:
case IEEE80211_M_STA:
case IEEE80211_M_MONITOR:
ic->ic_flags &= ~IEEE80211_F_IBSSON;
break;
case IEEE80211_M_IBSS:
ic->ic_flags |= IEEE80211_F_IBSSON;
#ifdef notdef
if (ic->ic_curmode == IEEE80211_MODE_11G)
ieee80211_set11gbasicrates(
&ic->ic_sup_rates[newphymode],
IEEE80211_MODE_11B);
#endif
break;
}
error = ENETRESET;
}
#ifdef notdef
if (error == 0)
ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
#endif
return error;
}
