bool
channel_init(void) {
/* get available channels */
ifctrl_iwget_freqlist(conf.if_phy, &channels);
conf.channel_initialized = 1;
printf("Got %d Bands, %d Channels:\n", channels.num_bands, channels.num_channels);
for (int i = 0; i < channels.num_channels && i < MAX_CHANNELS; i++)
printf("%s\n", channel_get_string(i));
if (conf.channel_set_num > 0) {
/* configured values */
int ini_idx = channel_find_index_from_chan(conf.channel_set_num);
if (!channel_change(ini_idx, conf.channel_set_width, conf.channel_set_ht40plus))
return false;
} else {
conf.channel_idx = channel_find_index_from_freq(conf.if_freq);
conf.channel_set_num = channel_get_chan(conf.channel_idx);
if (conf.channel_idx < 0)
return true; // not failure
/* try to set max width */
struct band_info b = channel_get_band_from_idx(conf.channel_idx);
if (conf.channel_width != b.max_chan_width) {
printlog("Try to set max channel width %s",
channel_width_string(b.max_chan_width, -1));
// try both HT40+ and HT40- if necessary
if (!channel_change(conf.channel_idx, b.max_chan_width, true) &&
!channel_change(conf.channel_idx, b.max_chan_width, false))
return false;
}
}
return true;
}
bool
channel_auto_change(void)
{
int new_idx;
bool ret = true;
int start_idx;
if (conf.channel_idx == -1)
return false; /* The current channel is still unknown for some
* reason (mac80211 bug, busy physical interface,
* etc.), it will be fixed when the first packet
* arrives, see fixup_packet_channel().
*
* Without this return, horst would busy-loop forever
* (making the ui totally unresponsive) in the channel
* changing code below because start_idx would be -1
* as well. Short-circuit exiting here is quite
* logical though: it does not make any sense to scan
* channels as long as the channel module is not
* initialized properly. */
if (channel_get_remaining_dwell_time() > 0)
return false; /* too early */
if (conf.do_change_channel) {
start_idx = new_idx = conf.channel_idx;
do {
enum chan_width max_width = channel_get_band_from_idx(new_idx).max_chan_width;
/*
* For HT40 we visit the same channel twice, once with HT40+
* and once with HT40-. This is necessary to see the HT40+/-
* data packets
*/
if (max_width == CHAN_WIDTH_40) {
if (conf.channel_ht40plus)
new_idx++;
conf.channel_ht40plus = !conf.channel_ht40plus; // toggle
} else {
new_idx++;
}
if (new_idx >= channels.num_channels ||
new_idx >= MAX_CHANNELS ||
(conf.channel_max &&
channel_get_chan(new_idx) > conf.channel_max))
new_idx = 0;
ret = channel_change(new_idx, max_width, conf.channel_ht40plus);
/* try setting different channels in case we get errors only
* on some channels (e.g. ipw2200 reports channel 14 but cannot
* be set to use it). stop if we tried all channels */
} while (ret != 1 && new_idx != start_idx);
}
return ret;
}
int
channel_input(WINDOW *win, int c)
{
char buf[6];
int x;
switch (c) {
case 'a': case 'A':
conf.do_change_channel = conf.do_change_channel ? 0 : 1;
break;
case 'd': case 'D':
echo();
curs_set(1);
mvwgetnstr(win, 3, 25, buf, 6);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
conf.channel_time = x*1000;
break;
case 'u': case 'U':
echo();
curs_set(1);
mvwgetnstr(win, 4, 26, buf, 6);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
conf.channel_max = x;
break;
case 'm': case 'M':
conf.do_change_channel = 0;
echo();
curs_set(1);
mvwgetnstr(win, 6, 30, buf, 2);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
x = channel_find_index_from_chan(x);
if (x >= 0) {
if (!conf.serveraddr)
channel_change(x);
else
conf.channel_idx = x;
}
break;
default:
return 0; /* didn't handle input */
}
net_send_channel_config();
update_channel_win(win);
return 1;
}
bool
channel_init(void) {
/* get available channels */
ifctrl_iwget_freqlist(conf.if_phy, channels);
conf.channel_idx = channel_find_index_from_freq(conf.if_freq);
if (conf.channel_num_initial > 0) {
if (!channel_change(channel_find_index_from_chan(conf.channel_num_initial)))
return false;
} else {
conf.channel_num_initial = channel_get_chan_from_idx(conf.channel_idx);
}
conf.channel_initialized = 1;
return true;
}
bool
channel_auto_change(void)
{
int new_idx;
bool ret = true;
int start_idx;
if (conf.channel_idx == -1)
return false; /* The current channel is still unknown for some
* reason (mac80211 bug, busy physical interface,
* etc.), it will be fixed when the first packet
* arrives, see fixup_packet_channel().
*
* Without this return, horst would busy-loop forever
* (making the ui totally unresponsive) in the channel
* changing code below because start_idx would be -1
* as well. Short-circuit exiting here is quite
* logical though: it does not make any sense to scan
* channels as long as the channel module is not
* initialized properly. */
if (channel_get_remaining_dwell_time() > 0)
return false; /* too early */
if (conf.do_change_channel) {
start_idx = new_idx = conf.channel_idx;
do {
new_idx = new_idx + 1;
if (new_idx >= conf.num_channels ||
new_idx >= MAX_CHANNELS ||
(conf.channel_max &&
channel_get_chan_from_idx(new_idx) > conf.channel_max))
new_idx = 0;
ret = channel_change(new_idx);
/* try setting different channels in case we get errors only
* on some channels (e.g. ipw2200 reports channel 14 but cannot
* be set to use it). stop if we tried all channels */
} while (ret != 1 && new_idx != start_idx);
}
return ret;
}
static int net_receive_conf_chan(unsigned char *buffer, size_t len)
{
struct net_conf_chan *nc;
if (len < sizeof(struct net_conf_chan))
return 0;
nc = (struct net_conf_chan *)buffer;
conf.do_change_channel = nc->do_change;
conf.channel_max = nc->upper;
conf.channel_time = le32toh(nc->dwell_time);
enum chan_width width = nc->width_ht40p & ~NET_WIDTH_HT40PLUS;
bool ht40p = !!(nc->width_ht40p & NET_WIDTH_HT40PLUS);
if (nc->channel != conf.channel_idx ||
width != conf.channel_width ||
ht40p != conf.channel_ht40plus) { /* something changed */
if (cli_fd > -1) { /* server */
if (!channel_change(nc->channel, width, ht40p)) {
printlog("Net Channel %d %s is not available/allowed",
channel_get_chan(nc->channel),
channel_width_string(width, ht40p));
net_send_channel_config();
} else {
/* success: update UI */
conf.channel_set_num = channel_get_chan(nc->channel);
conf.channel_set_width = width;
conf.channel_set_ht40plus = ht40p;
update_display(NULL);
}
} else { /* client */
conf.channel_idx = nc->channel;
conf.channel_width = conf.channel_set_width = width;
conf.channel_ht40plus = conf.channel_set_ht40plus = ht40p;
conf.channel_set_num = channel_get_chan(nc->channel);
update_spectrum_durations();
update_display(NULL);
}
}
return sizeof(struct net_conf_chan);
}
static int
net_receive_conf_chan(unsigned char *buffer, size_t len)
{
struct net_conf_chan *nc;
if (len < sizeof(struct net_conf_chan))
return 0;
nc = (struct net_conf_chan *)buffer;
conf.do_change_channel = nc->do_change;
conf.channel_max = nc->upper;
conf.channel_time = le32toh(nc->dwell_time);
if (cli_fd > -1 && nc->channel != conf.channel_idx) /* server */
channel_change(nc->channel);
else { /* client */
conf.channel_idx = nc->channel;
update_spectrum_durations();
}
return sizeof(struct net_conf_chan);
}
bool
channel_input(WINDOW *win, int c)
{
char buf[6];
int x;
switch (c) {
case 's': case 'S':
conf.do_change_channel = conf.do_change_channel ? 0 : 1;
break;
case 'd': case 'D':
echo();
curs_set(1);
mvwgetnstr(win, 18, 12, buf, 6);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
conf.channel_time = x*1000;
break;
case 'u': case 'U':
echo();
curs_set(1);
mvwgetnstr(win, 19, 18, buf, 6);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
conf.channel_max = x;
break;
case 'm': case 'M':
echo();
curs_set(1);
mvwgetnstr(win, 21, 18, buf, 3);
curs_set(0);
noecho();
sscanf(buf, "%d", &x);
int i = channel_find_index_from_chan(x);
if (i >= 0) {
if (!conf.serveraddr[0] != '\0') {
if (!channel_change(i, conf.channel_set_width, conf.channel_set_ht40plus))
printlog("Channel %d %s is not available/allowed", x,
channel_width_string(conf.channel_set_width,
conf.channel_set_ht40plus));
} else
conf.channel_idx = i;
}
break;
case '1':
conf.channel_set_width = CHAN_WIDTH_20_NOHT;
break;
case '2':
conf.channel_set_width = CHAN_WIDTH_20;
break;
case '4':
conf.channel_set_width = CHAN_WIDTH_40;
conf.channel_set_ht40plus = false;
break;
case '5':
conf.channel_set_width = CHAN_WIDTH_40;
conf.channel_set_ht40plus = true;
break;
case '8':
conf.channel_set_width = CHAN_WIDTH_80;
break;
case '6':
conf.channel_set_width = CHAN_WIDTH_160;
break;
default:
return false; /* didn't handle input */
}
// TODO: net client has not set channel_width and ht40p yet:
net_send_channel_config();
update_channel_win(win);
return true;
}
