[PATCH 05/25] Add functions to convert channel bandwidth to an integer

[Maty Vanhoef <Mathy.Vanhoef@xxxxxxxxxxxxxx>]

This adds two utility functions to convert both operating classes and
and the chan_width enum to an integer representing the channel
bandwidth. This can then be used to compare bandwidth parameters in an
uniform manner.

Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@xxxxxxxxxxxxxx>
---
 src/common/ieee802_11_common.c | 21 +++++++++++++++++++++
 src/common/ieee802_11_common.h |  1 +
 src/drivers/driver.h           |  2 ++
 src/drivers/driver_common.c    | 19 +++++++++++++++++++
 4 files changed, 43 insertions(+)

diff --git a/src/common/ieee802_11_common.c b/src/common/ieee802_11_common.c
index 1c64f9b00..c730ebce0 100644
--- a/src/common/ieee802_11_common.c
+++ b/src/common/ieee802_11_common.c
@@ -1698,6 +1698,27 @@ const struct oper_class_map * get_oper_class(const char *country, u8 op_class)
 }
 
 
+int oper_class_bw_to_int(const struct oper_class_map *map)
+{
+	switch (map->bw) {
+	case BW20:
+		return 20;
+	case BW40PLUS:
+	case BW40MINUS:
+		return 40;
+	case BW80:
+		return 80;
+	case BW80P80:
+	case BW160:
+		return 160;
+	case BW2160:
+		return 2160;
+	default:
+		return 0;
+	}
+}
+
+
 int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
 				    size_t nei_rep_len)
 {
diff --git a/src/common/ieee802_11_common.h b/src/common/ieee802_11_common.h
index 36cb71a5b..26ed66ee3 100644
--- a/src/common/ieee802_11_common.h
+++ b/src/common/ieee802_11_common.h
@@ -201,6 +201,7 @@ struct country_op_class {
 u8 country_to_global_op_class(const char *country, u8 op_class);
 
 const struct oper_class_map * get_oper_class(const char *country, u8 op_class);
+int oper_class_bw_to_int(const struct oper_class_map *map);
 
 int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
 				    size_t nei_rep_len);
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index b111fbecb..d679fbc57 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -5534,6 +5534,8 @@ const char * event_to_string(enum wpa_event_type event);
 /* Convert chan_width to a string for logging and control interfaces */
 const char * channel_width_to_string(enum chan_width width);
 
+int channel_width_to_int(enum chan_width width);
+
 int ht_supported(const struct hostapd_hw_modes *mode);
 int vht_supported(const struct hostapd_hw_modes *mode);
 
diff --git a/src/drivers/driver_common.c b/src/drivers/driver_common.c
index ac0916e40..1b92e8605 100644
--- a/src/drivers/driver_common.c
+++ b/src/drivers/driver_common.c
@@ -115,6 +115,25 @@ const char * channel_width_to_string(enum chan_width width)
 }
 
 
+int channel_width_to_int(enum chan_width width)
+{
+	switch (width) {
+	case CHAN_WIDTH_20_NOHT:
+	case CHAN_WIDTH_20:
+		return 20;
+	case CHAN_WIDTH_40:
+		return 40;
+	case CHAN_WIDTH_80:
+		return 80;
+	case CHAN_WIDTH_80P80:
+	case CHAN_WIDTH_160:
+		return 160;
+	default:
+		return 0;
+	}
+}
+
+
 int ht_supported(const struct hostapd_hw_modes *mode)
 {
 	if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
-- 
2.18.0

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