P2P: Allow channels to be removed from P2P use
A list of disallowed frequencies for P2P channel list can now be configured with P2P_SET disallow_freq. The frequencies (or frequency pairs) are comma separated. For example: wpa_cli p2p_set disallow_freq 2462,5000-6000 The allowed P2P channel list is constructed by removing explicitly disallowed channels from the channel list received from the driver. Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
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4 changed files with 140 additions and 21 deletions
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@ -3287,6 +3287,56 @@ static int p2p_ctrl_peer(struct wpa_supplicant *wpa_s, char *cmd,
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}
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}
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static int p2p_ctrl_disallow_freq(struct wpa_supplicant *wpa_s,
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const char *param)
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{
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struct wpa_freq_range *freq = NULL, *n;
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unsigned int count = 0, i;
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const char *pos, *pos2, *pos3;
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if (wpa_s->global->p2p == NULL)
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return -1;
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/*
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* param includes comma separated frequency range.
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* For example: 2412-2432,2462,5000-6000
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*/
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pos = param;
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while (pos && pos[0]) {
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n = os_realloc(freq,
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(count + 1) * sizeof(struct wpa_freq_range));
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if (n == NULL) {
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os_free(freq);
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return -1;
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}
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freq = n;
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freq[count].min = atoi(pos);
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pos2 = os_strchr(pos, '-');
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pos3 = os_strchr(pos, ',');
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if (pos2 && (!pos3 || pos2 < pos3)) {
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pos2++;
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freq[count].max = atoi(pos2);
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} else
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freq[count].max = freq[count].min;
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pos = pos3;
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if (pos)
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pos++;
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count++;
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}
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for (i = 0; i < count; i++) {
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wpa_printf(MSG_DEBUG, "P2P: Disallowed frequency range %u-%u",
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freq[i].min, freq[i].max);
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}
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os_free(wpa_s->global->p2p_disallow_freq);
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wpa_s->global->p2p_disallow_freq = freq;
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wpa_s->global->num_p2p_disallow_freq = count;
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wpas_p2p_update_channel_list(wpa_s);
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return 0;
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}
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static int p2p_ctrl_set(struct wpa_supplicant *wpa_s, char *cmd)
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static int p2p_ctrl_set(struct wpa_supplicant *wpa_s, char *cmd)
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{
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{
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char *param;
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char *param;
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@ -3431,6 +3481,9 @@ static int p2p_ctrl_set(struct wpa_supplicant *wpa_s, char *cmd)
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return 0;
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return 0;
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}
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}
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if (os_strcmp(cmd, "disallow_freq") == 0)
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return p2p_ctrl_disallow_freq(wpa_s, param);
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wpa_printf(MSG_DEBUG, "CTRL_IFACE: Unknown P2P_SET field value '%s'",
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wpa_printf(MSG_DEBUG, "CTRL_IFACE: Unknown P2P_SET field value '%s'",
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cmd);
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cmd);
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@ -2030,6 +2030,31 @@ static void wpas_invitation_result(void *ctx, int status, const u8 *bssid)
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}
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}
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static int wpas_p2p_disallowed_freq(struct wpa_global *global,
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unsigned int freq)
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{
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unsigned int i;
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if (global->p2p_disallow_freq == NULL)
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return 0;
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for (i = 0; i < global->num_p2p_disallow_freq; i++) {
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if (freq >= global->p2p_disallow_freq[i].min &&
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freq <= global->p2p_disallow_freq[i].max)
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return 1;
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}
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return 0;
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}
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static void wpas_p2p_add_chan(struct p2p_reg_class *reg, u8 chan)
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{
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reg->channel[reg->channels] = chan;
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reg->channels++;
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}
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static int wpas_p2p_default_channels(struct wpa_supplicant *wpa_s,
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static int wpas_p2p_default_channels(struct wpa_supplicant *wpa_s,
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struct p2p_channels *chan)
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struct p2p_channels *chan)
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{
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{
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@ -2040,34 +2065,47 @@ static int wpas_p2p_default_channels(struct wpa_supplicant *wpa_s,
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/* Operating class 81 - 2.4 GHz band channels 1..13 */
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/* Operating class 81 - 2.4 GHz band channels 1..13 */
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chan->reg_class[cla].reg_class = 81;
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chan->reg_class[cla].reg_class = 81;
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chan->reg_class[cla].channels = 11;
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chan->reg_class[cla].channels = 0;
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for (i = 0; i < 11; i++)
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for (i = 0; i < 11; i++) {
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chan->reg_class[cla].channel[i] = i + 1;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 2412 + i * 5))
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cla++;
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wpas_p2p_add_chan(&chan->reg_class[cla], i + 1);
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}
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if (chan->reg_class[cla].channels)
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cla++;
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wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for lower 5 GHz "
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wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for lower 5 GHz "
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"band");
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"band");
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/* Operating class 115 - 5 GHz, channels 36-48 */
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/* Operating class 115 - 5 GHz, channels 36-48 */
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chan->reg_class[cla].reg_class = 115;
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chan->reg_class[cla].reg_class = 115;
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chan->reg_class[cla].channels = 4;
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chan->reg_class[cla].channels = 0;
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chan->reg_class[cla].channel[0] = 36;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 36 * 5))
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chan->reg_class[cla].channel[1] = 40;
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wpas_p2p_add_chan(&chan->reg_class[cla], 36);
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chan->reg_class[cla].channel[2] = 44;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 40 * 5))
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chan->reg_class[cla].channel[3] = 48;
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wpas_p2p_add_chan(&chan->reg_class[cla], 40);
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cla++;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 44 * 5))
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wpas_p2p_add_chan(&chan->reg_class[cla], 44);
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 48 * 5))
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wpas_p2p_add_chan(&chan->reg_class[cla], 48);
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if (chan->reg_class[cla].channels)
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cla++;
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wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for higher 5 GHz "
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wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for higher 5 GHz "
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"band");
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"band");
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/* Operating class 124 - 5 GHz, channels 149,153,157,161 */
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/* Operating class 124 - 5 GHz, channels 149,153,157,161 */
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chan->reg_class[cla].reg_class = 124;
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chan->reg_class[cla].reg_class = 124;
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chan->reg_class[cla].channels = 4;
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chan->reg_class[cla].channels = 0;
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chan->reg_class[cla].channel[0] = 149;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 149 * 5))
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chan->reg_class[cla].channel[1] = 153;
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wpas_p2p_add_chan(&chan->reg_class[cla], 149);
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chan->reg_class[cla].channel[2] = 157;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 153 * 5))
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chan->reg_class[cla].channel[3] = 161;
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wpas_p2p_add_chan(&chan->reg_class[cla], 153);
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cla++;
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 156 * 5))
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wpas_p2p_add_chan(&chan->reg_class[cla], 157);
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if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 161 * 5))
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wpas_p2p_add_chan(&chan->reg_class[cla], 161);
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if (chan->reg_class[cla].channels)
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cla++;
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chan->reg_classes = cla;
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chan->reg_classes = cla;
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return 0;
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return 0;
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@ -2089,9 +2127,16 @@ static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
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}
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}
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static int has_channel(struct hostapd_hw_modes *mode, u8 chan, int *flags)
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static int has_channel(struct wpa_global *global,
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struct hostapd_hw_modes *mode, u8 chan, int *flags)
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{
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{
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int i;
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int i;
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unsigned int freq;
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freq = (mode->mode == HOSTAPD_MODE_IEEE80211A ? 5000 : 2407) +
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chan * 5;
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if (wpas_p2p_disallowed_freq(global, freq))
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return 0;
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for (i = 0; i < mode->num_channels; i++) {
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for (i = 0; i < mode->num_channels; i++) {
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if (mode->channels[i].chan == chan) {
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if (mode->channels[i].chan == chan) {
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@ -2158,15 +2203,15 @@ static int wpas_p2p_setup_channels(struct wpa_supplicant *wpa_s,
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continue;
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continue;
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for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) {
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for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) {
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int flag;
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int flag;
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if (!has_channel(mode, ch, &flag))
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if (!has_channel(wpa_s->global, mode, ch, &flag))
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continue;
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continue;
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if (o->bw == BW40MINUS &&
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if (o->bw == BW40MINUS &&
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(!(flag & HOSTAPD_CHAN_HT40MINUS) ||
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(!(flag & HOSTAPD_CHAN_HT40MINUS) ||
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!has_channel(mode, ch - 4, NULL)))
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!has_channel(wpa_s->global, mode, ch - 4, NULL)))
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continue;
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continue;
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if (o->bw == BW40PLUS &&
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if (o->bw == BW40PLUS &&
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(!(flag & HOSTAPD_CHAN_HT40PLUS) ||
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(!(flag & HOSTAPD_CHAN_HT40PLUS) ||
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!has_channel(mode, ch + 4, NULL)))
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!has_channel(wpa_s->global, mode, ch + 4, NULL)))
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continue;
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continue;
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if (reg == NULL) {
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if (reg == NULL) {
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wpa_printf(MSG_DEBUG, "P2P: Add operating "
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wpa_printf(MSG_DEBUG, "P2P: Add operating "
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wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 5 GHz "
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wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 5 GHz "
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"channel %d MHz", params->freq);
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"channel %d MHz", params->freq);
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} else {
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} else {
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params->freq = 2412;
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int chan;
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for (chan = 0; chan < 11; chan++) {
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params->freq = 2412 + chan * 5;
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if (!wpas_p2p_disallowed_freq(wpa_s->global,
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params->freq))
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break;
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}
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if (chan == 11) {
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wpa_printf(MSG_DEBUG, "P2P: No 2.4 GHz channel "
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"allowed");
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return -1;
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}
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wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz (no preference "
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wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz (no preference "
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"known)", params->freq);
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"known)", params->freq);
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}
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}
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@ -2951,6 +2951,8 @@ void wpa_supplicant_deinit(struct wpa_global *global)
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os_free(global->params.override_driver);
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os_free(global->params.override_driver);
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os_free(global->params.override_ctrl_interface);
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os_free(global->params.override_ctrl_interface);
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os_free(global->p2p_disallow_freq);
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os_free(global);
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os_free(global);
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wpa_debug_close_syslog();
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wpa_debug_close_syslog();
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wpa_debug_close_file();
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wpa_debug_close_file();
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@ -199,6 +199,12 @@ struct p2p_srv_upnp {
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char *service;
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char *service;
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};
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};
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struct wpa_freq_range {
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unsigned int min;
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unsigned int max;
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};
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/**
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/**
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* struct wpa_global - Internal, global data for all %wpa_supplicant interfaces
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* struct wpa_global - Internal, global data for all %wpa_supplicant interfaces
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*
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*
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@ -220,6 +226,8 @@ struct wpa_global {
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struct dl_list p2p_srv_upnp; /* struct p2p_srv_upnp */
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struct dl_list p2p_srv_upnp; /* struct p2p_srv_upnp */
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int p2p_disabled;
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int p2p_disabled;
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int cross_connection;
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int cross_connection;
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struct wpa_freq_range *p2p_disallow_freq;
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unsigned int num_p2p_disallow_freq;
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};
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};
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