Introduce Automated Frequency Coordination (AFC) support for UNII-5 and
UNII-7 6GHz bands.
AFC client will connect to AFCD providing AP related parameter for AFC
coordinator (e.g. geolocation, supported frequencies, ..).
AFC is required for Standard Power Devices (SPDs) to determine a lists
of channels and EIRP/PSD powers that are available in the 6GHz spectrum.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
hostapd/Makefile | 6 +
hostapd/config_file.c | 262 +++++++++++++
hostapd/defconfig | 3 +
hostapd/hostapd.conf | 42 +++
src/ap/afc.c | 850 ++++++++++++++++++++++++++++++++++++++++++
src/ap/ap_config.c | 16 +
src/ap/ap_config.h | 47 +++
src/ap/hostapd.c | 53 +++
src/ap/hostapd.h | 29 ++
src/ap/hw_features.c | 2 +
10 files changed, 1310 insertions(+)
create mode 100644 src/ap/afc.c
diff --git a/hostapd/Makefile b/hostapd/Makefile
index 94421d43b..0514b7bdc 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -103,6 +103,12 @@ CFLAGS += -DCONFIG_TAXONOMY
OBJS += ../src/ap/taxonomy.o
endif
+ifdef CONFIG_AFC
+CFLAGS += -DCONFIG_AFC
+OBJS += ../src/ap/afc.o
+LIBS += -ljson-c
+endif
+
ifdef CONFIG_MODULE_TESTS
CFLAGS += -DCONFIG_MODULE_TESTS
OBJS += hapd_module_tests.o
diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index 1af083917..fbebaa53d 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2436,6 +2436,191 @@ static int get_u16(const char *pos, int line, u16 *ret_val)
#endif /* CONFIG_IEEE80211BE */
+#ifdef CONFIG_AFC
+static int hostapd_afc_parse_cert_ids(struct hostapd_config *conf, char *pos)
+{
+ struct cert_id *c = NULL;
+ int i, count = 0;
+
+ while (pos && pos[0]) {
+ char *p;
+
+ c = os_realloc_array(c, count + 1, sizeof(*c));
+ if (!c)
+ return -ENOMEM;
+
+ i = count;
+ count++;
+
+ p = os_strchr(pos, ':');
+ if (!p)
+ goto error;
+
+ *p++ = '\0';
+ if (!p || !p[0])
+ goto error;
+
+ c[i].rulset = os_malloc(os_strlen(pos) + 1);
+ if (!c[i].rulset)
+ goto error;
+
+ os_strlcpy(c[i].rulset, pos, os_strlen(pos) + 1);
+ pos = p;
+ p = os_strchr(pos, ',');
+ if (p)
+ *p++ = '\0';
+
+ c[i].id = os_malloc(os_strlen(pos) + 1);
+ if (!c[i].id)
+ goto error;
+
+ os_strlcpy(c[i].id, pos, os_strlen(pos) + 1);
+ pos = p;
+ }
+
+ conf->afc.n_cert_ids = count;
+ conf->afc.cert_ids = c;
+
+ return 0;
+
+error:
+ for (i = 0; i < count; i++) {
+ os_free(c[i].rulset);
+ os_free(c[i].id);
+ }
+ os_free(c);
+
+ return -ENOMEM;
+}
+
+
+static int hostapd_afc_parse_position_data(struct afc_linear_polygon **data,
+ unsigned int *n_linear_polygon_data,
+ char *pos)
+{
+ struct afc_linear_polygon *d = NULL;
+ int i, count = 0;
+
+ while (pos && pos[0]) {
+ char *p, *end;
+
+ d = os_realloc_array(d, count + 1, sizeof(*d));
+ if (!d)
+ return -ENOMEM;
+
+ i = count;
+ count++;
+
+ p = os_strchr(pos, ':');
+ if (!p)
+ goto error;
+
+ *p++ = '\0';
+ if (!p || !p[0])
+ goto error;
+
+ d[i].longitude = strtod(pos, &end);
+ if (*end)
+ goto error;
+
+ pos = p;
+ p = os_strchr(pos, ',');
+ if (p)
+ *p++ = '\0';
+
+ d[i].latitude = strtod(pos, &end);
+ if (*end)
+ goto error;
+
+ pos = p;
+ }
+
+ *n_linear_polygon_data = count;
+ *data = d;
+
+ return 0;
+
+error:
+ os_free(d);
+ return -ENOMEM;
+}
+
+
+static int hostapd_afc_parse_freq_range(struct hostapd_config *conf, char *pos)
+{
+ struct afc_freq_range *f = NULL;
+ int i, count = 0;
+
+ while (pos && pos[0]) {
+ char *p;
+
+ f = os_realloc_array(f, count + 1, sizeof(*f));
+ if (!f)
+ return -ENOMEM;
+
+ i = count;
+ count++;
+
+ p = os_strchr(pos, ':');
+ if (!p)
+ goto error;
+
+ *p++ = '\0';
+ if (!p || !p[0])
+ goto error;
+
+ f[i].low_freq = atoi(pos);
+ pos = p;
+ p = os_strchr(pos, ',');
+ if (p)
+ *p++ = '\0';
+
+ f[i].high_freq = atoi(pos);
+ pos = p;
+ }
+
+ conf->afc.n_freq_range = count;
+ conf->afc.freq_range = f;
+
+ return 0;
+
+error:
+ os_free(f);
+ return -ENOMEM;
+}
+
+
+static int hostapd_afc_parse_op_class(struct hostapd_config *conf, char *pos)
+{
+ unsigned int *oc = NULL;
+ int i, count = 0;
+
+ while (pos && pos[0]) {
+ char *p;
+
+ oc = os_realloc_array(oc, count + 1, sizeof(*oc));
+ if (!oc)
+ return -ENOMEM;
+
+ i = count;
+ count++;
+
+ p = os_strchr(pos, ',');
+ if (p)
+ *p++ = '\0';
+
+ oc[i] = atoi(pos);
+ pos = p;
+ }
+
+ conf->afc.n_op_class = count;
+ conf->afc.op_class = oc;
+
+ return 0;
+}
+#endif /* CONFIG_AFC */
+
+
static int hostapd_config_fill(struct hostapd_config *conf,
struct hostapd_bss_config *bss,
const char *buf, char *pos, int line)
@@ -3800,6 +3985,83 @@ static int hostapd_config_fill(struct hostapd_config *conf,
return 1;
}
bss->unsol_bcast_probe_resp_interval = val;
+#ifdef CONFIG_AFC
+ } else if (os_strcmp(buf, "afcd_sock") == 0) {
+ conf->afc.socket = os_malloc(os_strlen(pos) + 1);
+ if (!conf->afc.socket)
+ return 1;
+
+ os_strlcpy(conf->afc.socket, pos, os_strlen(pos) + 1);
+ } else if (os_strcmp(buf, "afc_request_version") == 0) {
+ conf->afc.request.version = os_malloc(os_strlen(pos) + 1);
+ if (!conf->afc.request.version)
+ return 1;
+
+ os_strlcpy(conf->afc.request.version, pos, os_strlen(pos) + 1);
+ } else if (os_strcmp(buf, "afc_request_id") == 0) {
+ conf->afc.request.id = os_malloc(os_strlen(pos) + 1);
+ if (!conf->afc.request.id)
+ return 1;
+
+ os_strlcpy(conf->afc.request.id, pos, os_strlen(pos) + 1);
+ } else if (os_strcmp(buf, "afc_serial_number") == 0) {
+ conf->afc.request.sn = os_malloc(os_strlen(pos) + 1);
+ if (!conf->afc.request.sn)
+ return 1;
+
+ os_strlcpy(conf->afc.request.sn, pos, os_strlen(pos) + 1);
+ } else if (os_strcmp(buf, "afc_cert_ids") == 0) {
+ if (hostapd_afc_parse_cert_ids(conf, pos))
+ return 1;
+ } else if (os_strcmp(buf, "afc_location_type") == 0) {
+ conf->afc.location.type = atoi(pos);
+ if (conf->afc.location.type != ELLIPSE &&
+ conf->afc.location.type != LINEAR_POLYGON &&
+ conf->afc.location.type != RADIAL_POLYGON)
+ return 1;
+ } else if (os_strcmp(buf, "afc_linear_polygon") == 0) {
+ if (hostapd_afc_parse_position_data(
+ &conf->afc.location.linear_polygon_data,
+ &conf->afc.location.n_linear_polygon_data,
+ pos))
+ return 1;
+ } else if (os_strcmp(buf, "afc_radial_polygon") == 0) {
+ if (hostapd_afc_parse_position_data(
+ (struct afc_linear_polygon **)
+ &conf->afc.location.radial_polygon_data,
+ &conf->afc.location.n_radial_polygon_data,
+ pos))
+ return 1;
+ } else if (os_strcmp(buf, "afc_major_axis") == 0) {
+ conf->afc.location.major_axis = atoi(pos);
+ } else if (os_strcmp(buf, "afc_minor_axis") == 0) {
+ conf->afc.location.minor_axis = atoi(pos);
+ } else if (os_strcmp(buf, "afc_orientation") == 0) {
+ conf->afc.location.orientation = atoi(pos);
+ } else if (os_strcmp(buf, "afc_height") == 0) {
+ char *end;
+
+ conf->afc.location.height = strtod(pos, &end);
+ if (*end)
+ return 1;
+ } else if (os_strcmp(buf, "afc_height_type") == 0) {
+ conf->afc.location.height_type = os_malloc(os_strlen(pos) + 1);
+ if (!conf->afc.location.height_type)
+ return 1;
+
+ os_strlcpy(conf->afc.location.height_type, pos,
+ os_strlen(pos) + 1);
+ } else if (os_strcmp(buf, "afc_vertical_tolerance") == 0) {
+ conf->afc.location.vertical_tolerance = atoi(pos);
+ } else if (os_strcmp(buf, "afc_min_power") == 0) {
+ conf->afc.min_power = atoi(pos);
+ } else if (os_strcmp(buf, "afc_freq_range") == 0) {
+ if (hostapd_afc_parse_freq_range(conf, pos))
+ return 1;
+ } else if (os_strcmp(buf, "afc_op_class") == 0) {
+ if (hostapd_afc_parse_op_class(conf, pos))
+ return 1;
+#endif /* CONFIG_AFC */
} else if (os_strcmp(buf, "mbssid") == 0) {
int mbssid = atoi(pos);
if (mbssid < 0 || mbssid > ENHANCED_MBSSID_ENABLED) {
diff --git a/hostapd/defconfig b/hostapd/defconfig
index 2f5f3f6d0..ce2cdc977 100644
--- a/hostapd/defconfig
+++ b/hostapd/defconfig
@@ -422,3 +422,6 @@ CONFIG_DPP2=y
# Wi-Fi Aware unsynchronized service discovery (NAN USD)
#CONFIG_NAN_USD=y
+
+# Enable Automated Frequency Coordination for 6GHz outdoor
+#CONFIG_AFC=y
diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf
index 13576499a..48ae3b033 100644
--- a/hostapd/hostapd.conf
+++ b/hostapd/hostapd.conf
@@ -1005,6 +1005,48 @@ wmm_ac_vo_acm=0
# Valid range: 0..20 TUs; default is 0 (disabled)
#unsol_bcast_probe_resp_interval=0
+##### Automated Frequency Coordination for 6GHz UNII-5 and UNII-7 bands #######
+
+# AFC daemon connection socket
+#afcd_sock=/var/run/afcd.sock
+
+# AFC request identification parameters
+#afc_request_version=1.1
+#afc_request_id=11235813
+#afc_serial_number=abcdefg
+#afc_cert_ids=US_47_CFR_PART_15_SUBPART_E:CID000
+#
+# AFC location type:
+# 0 = ellipse
+# 1 = linear polygon
+# 2 = radial polygon
+#afc_location_type=0
+#
+# AFC ellipse or linear polygon coordinations
+#afc_linear_polygon=-122.984157:37.425056
+#
+# AFC radial polygon coordinations
+#afc_radial_polygon=118.8:92.76,76.44:87.456,98.56:123.33
+#
+# AFC ellipse major/minor axis and orientation
+#afc_major_axis=100
+#afc_minor_axis=50
+#afc_orientation=70
+#
+# AFC device elevation parameters
+#afc_height=3.0
+#afc_height_type=AGL
+#afc_vertical_tolerance=7
+#
+# AFC minimum desired TX power (dbm)
+#afc_min_power=24
+#
+# AFC request frequency ranges
+#afc_freq_range=5925:6425,6525:6875
+#
+# AFC request operation classes
+#afc_op_class=131,132,133,134,136
+
##### IEEE 802.11be related configuration #####################################
#ieee80211be: Whether IEEE 802.11be (EHT) is enabled
diff --git a/src/ap/afc.c b/src/ap/afc.c
new file mode 100644
index 000000000..34398c28a
--- /dev/null
+++ b/src/ap/afc.c
@@ -0,0 +1,850 @@
+/*
+ * Automated Frequency Coordination
+ * Copyright (c) 2024, Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include <json-c/json.h>
+#include <sys/un.h>
+#include <time.h>
+
+#include "utils/includes.h"
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "hostapd.h"
+#include "acs.h"
+
+#define HOSTAPD_AFC_RETRY_TIMEOUT 180
+#define HOSTAPD_AFC_TIMEOUT 86400 /* 24h */
+#define HOSTAPD_AFC_BUFSIZE 4096
+
+struct afc_curl_ctx {
+ int timeout;
+ char *buf;
+ size_t buf_len;
+};
+
+static void hostapd_afc_timeout_handler(void *eloop_ctx, void *timeout_ctx);
+
+
+static struct json_object *
+hostapd_afc_build_location_request(struct hostapd_iface *iface)
+{
+ struct json_object *location_obj, *center_obj, *ellipse_obj;
+ struct json_object *elevation_obj, *str_obj;
+ struct hostapd_config *iconf = iface->conf;
+ bool is_ap_indoor = he_reg_is_indoor(iconf->he_6ghz_reg_pwr_type);
+
+ location_obj = json_object_new_object();
+ if (!location_obj)
+ return NULL;
+
+ if (iconf->afc.location.type != LINEAR_POLYGON) {
+ struct afc_linear_polygon *lp =
+ &iconf->afc.location.linear_polygon_data[0];
+
+ ellipse_obj = json_object_new_object();
+ if (!ellipse_obj)
+ goto error;
+
+ center_obj = json_object_new_object();
+ if (!center_obj)
+ goto error;
+
+ json_object_object_add(ellipse_obj, "center", center_obj);
+
+ str_obj = json_object_new_double(lp->longitude);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(center_obj, "longitude", str_obj);
+ str_obj = json_object_new_double(lp->latitude);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(center_obj, "latitude", str_obj);
+
+ }
+
+ switch (iconf->afc.location.type) {
+ case LINEAR_POLYGON: {
+ struct json_object *outer_boundary_obj;
+ int i;
+
+ outer_boundary_obj = json_object_new_object();
+ if (!outer_boundary_obj)
+ goto error;
+
+ json_object_object_add(location_obj, "linearPolygon",
+ outer_boundary_obj);
+ ellipse_obj = json_object_new_array();
+ if (!ellipse_obj)
+ goto error;
+
+ json_object_object_add(outer_boundary_obj, "outerBoundary",
+ ellipse_obj);
+ for (i = 0;
+ i < iconf->afc.location.n_linear_polygon_data; i++) {
+ struct afc_linear_polygon *lp =
+ &iconf->afc.location.linear_polygon_data[i];
+
+ center_obj = json_object_new_object();
+ if (!center_obj)
+ goto error;
+
+ json_object_array_add(ellipse_obj, center_obj);
+ str_obj = json_object_new_double(lp->longitude);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(center_obj, "longitude",
+ str_obj);
+ str_obj = json_object_new_double(lp->latitude);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(center_obj, "latitude",
+ str_obj);
+ }
+ break;
+ }
+ case RADIAL_POLYGON: {
+ struct json_object *outer_boundary_obj;
+ int i;
+
+ json_object_object_add(location_obj, "radialPolygon",
+ ellipse_obj);
+
+ outer_boundary_obj = json_object_new_array();
+ if (!outer_boundary_obj)
+ goto error;
+
+ json_object_object_add(ellipse_obj, "outerBoundary",
+ outer_boundary_obj);
+ for (i = 0;
+ i < iconf->afc.location.n_radial_polygon_data; i++) {
+ struct afc_radial_polygon *rp =
+ &iconf->afc.location.radial_polygon_data[i];
+ struct json_object *angle_obj;
+
+ angle_obj = json_object_new_object();
+ if (!angle_obj)
+ goto error;
+
+ json_object_array_add(outer_boundary_obj, angle_obj);
+
+ str_obj = json_object_new_double(rp->angle);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(angle_obj, "angle", str_obj);
+ str_obj = json_object_new_double(rp->length);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(angle_obj, "length", str_obj);
+ }
+ break;
+ }
+ case ELLIPSE:
+ default:
+ json_object_object_add(location_obj, "ellipse", ellipse_obj);
+
+ str_obj = json_object_new_int(iconf->afc.location.major_axis);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(ellipse_obj, "majorAxis", str_obj);
+ str_obj = json_object_new_int(iconf->afc.location.minor_axis);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(ellipse_obj, "minorAxis", str_obj);
+ str_obj = json_object_new_int(iconf->afc.location.orientation);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(ellipse_obj, "orientation", str_obj);
+ break;
+ }
+
+ elevation_obj = json_object_new_object();
+ if (!elevation_obj)
+ goto error;
+
+ json_object_object_add(location_obj, "elevation",
+ elevation_obj);
+ str_obj = json_object_new_double(iconf->afc.location.height);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(elevation_obj, "height", str_obj);
+ str_obj = json_object_new_string(iconf->afc.location.height_type);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(elevation_obj, "heightType", str_obj);
+ str_obj = json_object_new_int(iconf->afc.location.vertical_tolerance);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(elevation_obj, "verticalUncertainty",
+ str_obj);
+ str_obj = json_object_new_int(is_ap_indoor);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(location_obj, "indoorDeployment", str_obj);
+
+ return location_obj;
+
+error:
+ json_object_put(location_obj);
+ return NULL;
+}
+
+
+static void
+hostapd_afc_get_opclass_chan_list(struct hostapd_iface *iface, u8 op_class,
+ u8 *chan_list, u16 *n_chan_list)
+{
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ int i, count = 0;
+
+ memset(chan_list, 0, mode->num_channels * sizeof(*chan_list));
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+
+ if (!is_6ghz_freq(chan->freq))
+ continue;
+
+ if (ieee80211_chan_to_freq(iface->conf->country, op_class,
+ chan->chan) < 0)
+ continue;
+
+ chan_list[count++] = chan->chan;
+ }
+ *n_chan_list = count;
+}
+
+
+static struct json_object *
+hostapd_afc_build_request(struct hostapd_iface *iface)
+{
+ struct json_object *l1_obj, *l2_obj, *la1_obj, *la2_obj;
+ struct json_object *s2_obj, *str_obj, *location_obj;
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ struct hostapd_config *iconf = iface->conf;
+ u8 *chan_list = NULL;
+ int i;
+
+ l1_obj = json_object_new_object();
+ if (!l1_obj)
+ return NULL;
+
+ if (iconf->afc.request.version) {
+ str_obj = json_object_new_string(iconf->afc.request.version);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(l1_obj, "version", str_obj);
+ }
+
+ la1_obj = json_object_new_array();
+ if (!la1_obj)
+ goto error;
+
+ json_object_object_add(l1_obj, "availableSpectrumInquiryRequests",
+ la1_obj);
+ l2_obj = json_object_new_object();
+ if (!l2_obj)
+ goto error;
+
+ json_object_array_add(la1_obj, l2_obj);
+ if (iconf->afc.request.id) {
+ str_obj = json_object_new_string(iconf->afc.request.id);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "requestId", str_obj);
+ }
+
+ s2_obj = json_object_new_object();
+ if (!s2_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "deviceDescriptor", s2_obj);
+ if (iconf->afc.request.sn) {
+ str_obj = json_object_new_string(iconf->afc.request.sn);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(s2_obj, "serialNumber", str_obj);
+ }
+
+ la2_obj = json_object_new_array();
+ if (!la2_obj)
+ goto error;
+
+ json_object_object_add(s2_obj, "certificationId", la2_obj);
+ for (i = 0; i < iconf->afc.n_cert_ids; i++) {
+ struct json_object *obj;
+
+ obj = json_object_new_object();
+ if (!obj)
+ goto error;
+
+ json_object_array_add(la2_obj, obj);
+ str_obj =
+ json_object_new_string(iconf->afc.cert_ids[i].rulset);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(obj, "rulesetId", str_obj);
+ str_obj = json_object_new_string(iconf->afc.cert_ids[i].id);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(obj, "id", str_obj);
+ }
+
+ location_obj = hostapd_afc_build_location_request(iface);
+ if (!location_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "location", location_obj);
+ str_obj = json_object_new_int(iconf->afc.min_power);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "minDesiredPower", str_obj);
+
+ if (iconf->afc.n_freq_range) {
+ struct json_object *freq_obj;
+
+ freq_obj = json_object_new_array();
+ if (!freq_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "inquiredFrequencyRange",
+ freq_obj);
+ for (i = 0; i < iconf->afc.n_freq_range; i++) {
+ struct afc_freq_range *fr = &iconf->afc.freq_range[i];
+ struct json_object *obj;
+
+ obj = json_object_new_object();
+ if (!obj)
+ goto error;
+
+ json_object_array_add(freq_obj, obj);
+ str_obj = json_object_new_int(fr->low_freq);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(obj, "lowFrequency", str_obj);
+ str_obj = json_object_new_int(fr->high_freq);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(obj, "highFrequency", str_obj);
+ }
+ }
+
+ if (iconf->afc.n_op_class) {
+ struct json_object *op_class_list_obj;
+
+ chan_list = os_malloc(mode->num_channels * sizeof(*chan_list));
+ if (!chan_list)
+ goto error;
+
+ op_class_list_obj = json_object_new_array();
+ if (!op_class_list_obj)
+ goto error;
+
+ json_object_object_add(l2_obj, "inquiredChannels",
+ op_class_list_obj);
+ for (i = 0; i < iconf->afc.n_op_class; i++) {
+ struct json_object *op_class_obj, *chan_list_obj;
+ u16 n_chan_list = 0;
+ int j;
+
+ hostapd_afc_get_opclass_chan_list(
+ iface, iconf->afc.op_class[i],
+ chan_list, &n_chan_list);
+ if (!n_chan_list)
+ continue;
+
+ op_class_obj = json_object_new_object();
+ if (!op_class_obj)
+ goto error;
+
+ json_object_array_add(op_class_list_obj, op_class_obj);
+ str_obj = json_object_new_int(iconf->afc.op_class[i]);
+ if (!str_obj)
+ goto error;
+
+ json_object_object_add(op_class_obj,
+ "globalOperatingClass",
+ str_obj);
+ chan_list_obj = json_object_new_array();
+ if (!chan_list_obj)
+ goto error;
+
+ json_object_object_add(op_class_obj, "channelCfi",
+ chan_list_obj);
+ for (j = 0; j < n_chan_list; j++) {
+ str_obj = json_object_new_int(chan_list[j]);
+ if (!str_obj)
+ goto error;
+
+ json_object_array_add(chan_list_obj, str_obj);
+ }
+ }
+ free(chan_list);
+ }
+
+ wpa_printf(MSG_DEBUG, "Pending AFC request: %s",
+ json_object_get_string(l1_obj));
+
+ return l1_obj;
+
+error:
+ free(chan_list);
+ json_object_put(l1_obj);
+
+ return NULL;
+}
+
+
+static int
+hostad_afc_parse_available_freq_info(struct hostapd_iface *iface,
+ struct json_object *reply_elem_obj)
+{
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ struct afc_freq_range_elem *f = NULL;
+ struct json_object *obj;
+ int i, count = 0;
+
+ if (!json_object_object_get_ex(reply_elem_obj,
+ "availableFrequencyInfo", &obj))
+ return 0;
+
+ for (i = 0; i < json_object_array_length(obj); i++) {
+ struct json_object *range_elem_obj, *freq_range_obj;
+ struct json_object *high_freq_obj, *low_freq_obj;
+ struct json_object *max_psd_obj;
+
+ range_elem_obj = json_object_array_get_idx(obj, i);
+ if (!json_object_object_get_ex(range_elem_obj,
+ "frequencyRange",
+ &freq_range_obj))
+ continue;
+
+ if (!json_object_object_get_ex(freq_range_obj,
+ "lowFrequency",
+ &low_freq_obj))
+ continue;
+
+ if (!json_object_object_get_ex(freq_range_obj,
+ "highFrequency",
+ &high_freq_obj))
+ continue;
+
+ if (!json_object_object_get_ex(range_elem_obj, "maxPsd",
+ &max_psd_obj) &&
+ !json_object_object_get_ex(range_elem_obj, "maxPSD",
+ &max_psd_obj))
+ continue;
+
+ f = os_realloc_array(f, count + 1, sizeof(*f));
+ if (!f)
+ return -ENOMEM;
+
+ f[count].low_freq = json_object_get_int(low_freq_obj);
+ f[count].high_freq = json_object_get_int(high_freq_obj);
+ f[count++].max_psd = json_object_get_int(max_psd_obj);
+ }
+ os_free(iface->afc.freq_range);
+ iface->afc.freq_range = f;
+ iface->afc.num_freq_range = count;
+
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+ int j;
+
+ if (!is_6ghz_freq(chan->freq))
+ continue;
+
+ for (j = 0; j < count; j++) {
+ if (chan->freq >= f[j].low_freq &&
+ chan->freq <= f[j].high_freq)
+ break;
+ }
+
+ if (j == count)
+ chan->flag |= HOSTAPD_CHAN_DISABLED;
+ }
+
+ return 0;
+}
+
+
+static int
+hostad_afc_parse_available_chan_info(struct hostapd_iface *iface,
+ struct json_object *reply_elem_obj)
+{
+ struct json_object *obj;
+ int i;
+
+ if (!json_object_object_get_ex(reply_elem_obj,
+ "availableChannelInfo", &obj))
+ return 0;
+
+ for (i = 0; i < json_object_array_length(obj); i++) {
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ struct json_object *range_elem_obj, *op_class_obj;
+ struct json_object *chan_cfi_obj, *max_eirp_obj;
+ struct afc_chan_info_elem *c = NULL;
+ int j, ch, op_class, count = 0;
+
+ range_elem_obj = json_object_array_get_idx(obj, i);
+ if (!json_object_object_get_ex(range_elem_obj,
+ "globalOperatingClass",
+ &op_class_obj))
+ continue;
+
+ op_class = json_object_get_int(op_class_obj);
+ if (op_class != iface->conf->op_class)
+ continue;
+
+ if (!json_object_object_get_ex(range_elem_obj, "maxEirp",
+ &max_eirp_obj))
+ continue;
+
+ if (!json_object_object_get_ex(range_elem_obj, "channelCfi",
+ &chan_cfi_obj))
+ continue;
+
+ for (ch = 0;
+ ch < json_object_array_length(chan_cfi_obj); ch++) {
+ struct json_object *pwr_obj;
+ struct json_object *ch_obj;
+ int channel, power;
+
+ ch_obj = json_object_array_get_idx(chan_cfi_obj, ch);
+ if (!ch_obj)
+ continue;
+
+ pwr_obj = json_object_array_get_idx(max_eirp_obj, ch);
+ if (!pwr_obj)
+ continue;
+
+ channel = json_object_get_int(ch_obj);
+ power = json_object_get_int(pwr_obj);
+
+ c = os_realloc_array(c, count + 1, sizeof(*c));
+ if (!c)
+ return -ENOMEM;
+
+ c[count].chan = channel;
+ c[count++].power = power;
+ }
+ os_free(iface->afc.chan_info_list);
+ iface->afc.chan_info_list = c;
+ iface->afc.num_chan_info = count;
+
+ for (j = 0; j < mode->num_channels; j++) {
+ struct hostapd_channel_data *chan = &mode->channels[j];
+ int n;
+
+ if (!is_6ghz_freq(chan->freq))
+ continue;
+
+ for (n = 0; n < count; n++) {
+ if (chan->chan == c[n].chan)
+ break;
+ }
+
+ if (n == count)
+ chan->flag |= HOSTAPD_CHAN_DISABLED;
+ }
+ }
+
+ return 0;
+}
+
+
+static int hostad_afc_get_timeout(struct json_object *obj)
+{
+ time_t t, now;
+ struct tm tm;
+
+ if (sscanf(json_object_get_string(obj), "%d-%d-%dT%d:%d:%dZ",
+ &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
+ &tm.tm_min, &tm.tm_sec) <= 0)
+ return HOSTAPD_AFC_TIMEOUT;
+
+ tm.tm_year -= 1900;
+ tm.tm_mon -= 1;
+ tm.tm_isdst = -1;
+ t = mktime(&tm);
+ time(&now);
+
+ return now > t ? HOSTAPD_AFC_RETRY_TIMEOUT : (t - now) * 80 / 100;
+}
+
+
+static int hostapd_afc_parse_reply(struct hostapd_iface *iface, char *reply)
+{
+ int i, request_timeout = HOSTAPD_AFC_RETRY_TIMEOUT, ret = -EINVAL;
+ struct json_object *payload_obj, *reply_obj, *version_obj;
+ struct hostapd_config *iconf = iface->conf;
+
+ wpa_printf(MSG_DEBUG, "Received AFC reply: %s", reply);
+ payload_obj = json_tokener_parse(reply);
+ if (!payload_obj)
+ return -EINVAL;
+
+ if (!json_object_object_get_ex(payload_obj, "version", &version_obj))
+ return -EINVAL;
+
+ if (iconf->afc.request.version &&
+ os_strcmp(iconf->afc.request.version,
+ json_object_get_string(version_obj)))
+ return -EINVAL;
+
+ if (!json_object_object_get_ex(payload_obj,
+ "availableSpectrumInquiryResponses",
+ &reply_obj))
+ return -EINVAL;
+
+ for (i = 0; i < json_object_array_length(reply_obj); i++) {
+ struct json_object *reply_elem_obj, *obj, *status_obj;
+ int j, status = -EINVAL;
+
+ reply_elem_obj = json_object_array_get_idx(reply_obj, i);
+ if (!reply_elem_obj)
+ continue;
+
+ if (!json_object_object_get_ex(reply_elem_obj, "requestId",
+ &obj))
+ continue;
+
+ if (iconf->afc.request.id &&
+ os_strcmp(iconf->afc.request.id,
+ json_object_get_string(obj)))
+ continue;
+
+ if (!json_object_object_get_ex(reply_elem_obj, "rulesetId",
+ &obj))
+ continue;
+
+ for (j = 0; j < iconf->afc.n_cert_ids; j++) {
+ if (!os_strcmp(iconf->afc.cert_ids[j].rulset,
+ json_object_get_string(obj)))
+ break;
+ }
+
+ if (j == iconf->afc.n_cert_ids)
+ continue;
+
+ if (!json_object_object_get_ex(reply_elem_obj, "response",
+ &obj))
+ continue;
+
+ if (json_object_object_get_ex(obj, "shortDescription",
+ &status_obj))
+ wpa_printf(MSG_DEBUG, "AFC reply element %d: %s",
+ i, json_object_get_string(status_obj));
+
+ if (json_object_object_get_ex(obj, "responseCode",
+ &status_obj))
+ status = json_object_get_int(status_obj);
+
+ if (status < 0)
+ continue;
+
+ if (hostad_afc_parse_available_freq_info(iface,
+ reply_elem_obj) ||
+ hostad_afc_parse_available_chan_info(iface,
+ reply_elem_obj))
+ continue;
+
+ if (json_object_object_get_ex(reply_elem_obj,
+ "availabilityExpireTime",
+ &obj)) {
+ int timeout = hostad_afc_get_timeout(obj);
+
+ if (timeout < request_timeout)
+ request_timeout = timeout;
+ }
+
+ ret = status;
+ }
+
+ return ret < 0 ? ret : request_timeout;
+}
+
+
+static int hostapd_afc_send_receive(struct hostapd_iface *iface,
+ int *request_timeout)
+{
+ struct hostapd_config *iconf = iface->conf;
+ json_object *request_obj = NULL;
+ struct timeval sock_timeout = {
+ .tv_sec = 2,
+ };
+ struct sockaddr_un addr = {
+ .sun_family = AF_UNIX,
+#ifdef __FreeBSD__
+ .sun_len = sizeof(addr),
+#endif /* __FreeBSD__ */
+ };
+ char buf[HOSTAPD_AFC_BUFSIZE] = {};
+ const char *request;
+ int sockfd, ret;
+ fd_set read_set;
+
+ *request_timeout = HOSTAPD_AFC_RETRY_TIMEOUT;
+ if (iface->afc.data_valid)
+ return 0;
+
+ if (os_strlen(iconf->afc.socket) >= sizeof(addr.sun_path)) {
+ wpa_printf(MSG_ERROR, "Malformed AFC socket string %s",
+ iconf->afc.socket);
+ return -EINVAL;
+ }
+
+ os_strlcpy(addr.sun_path, iconf->afc.socket, sizeof(addr.sun_path));
+ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sockfd < 0) {
+ wpa_printf(MSG_ERROR, "Failed creating AFC socket");
+ return sockfd;
+ }
+
+ if (connect(sockfd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+ wpa_printf(MSG_ERROR, "Failed connecting AFC socket");
+ ret = -EIO;
+ goto close_sock;
+ }
+
+ request_obj = hostapd_afc_build_request(iface);
+ if (!request_obj) {
+ ret = -ENOMEM;
+ goto close_sock;
+ }
+
+ request = json_object_to_json_string(request_obj);
+ if (send(sockfd, request, strlen(request), 0) < 0) {
+ wpa_printf(MSG_ERROR, "Failed sending AFC request");
+ ret = -EIO;
+ goto close_sock;
+ }
+
+ FD_ZERO(&read_set);
+ FD_SET(sockfd, &read_set);
+ if (select(sockfd + 1, &read_set, NULL, NULL, &sock_timeout) < 0) {
+ wpa_printf(MSG_ERROR, "Select failed on AFC socket");
+ ret = -errno;
+ goto close_sock;
+ }
+
+ if (!FD_ISSET(sockfd, &read_set)) {
+ ret = -EIO;
+ goto close_sock;
+ }
+
+ ret = recv(sockfd, buf, sizeof(buf), 0);
+ if (ret <= 0)
+ goto close_sock;
+
+ ret = hostapd_afc_parse_reply(iface, buf);
+ if (ret > 0) {
+ iface->afc.data_valid = true;
+ *request_timeout = ret;
+ ret = 0;
+ }
+
+close_sock:
+ json_object_put(request_obj);
+ close(sockfd);
+
+ return ret;
+}
+
+
+int hostapd_afc_handle_request(struct hostapd_iface *iface)
+{
+ struct hostapd_config *iconf = iface->conf;
+ int ret, request_timeout;
+
+ if (iface->afc.completed)
+ return 1;
+
+ /* AFC is required just for standard power AP */
+ if (!he_reg_is_sp(iconf->he_6ghz_reg_pwr_type))
+ return 1;
+
+ if (!is_6ghz_op_class(iconf->op_class) || !is_6ghz_freq(iface->freq))
+ return 1;
+
+ ret = hostapd_afc_send_receive(iface, &request_timeout);
+ if (ret < 0) {
+ /*
+ * If the connection to the AFCD failed, resched for a
+ * future attempt.
+ */
+ if (ret == -EIO)
+ ret = 0;
+ goto resched;
+ }
+
+ /* Trigger a ACS freq scan */
+ iface->freq = 0;
+ iconf->channel = 0;
+ iface->afc.completed = true;
+
+ if (acs_init(iface) != HOSTAPD_CHAN_ACS) {
+ wpa_printf(MSG_ERROR, "Could not start ACS");
+ ret = -EINVAL;
+ }
+
+resched:
+ eloop_register_timeout(request_timeout, 0, hostapd_afc_timeout_handler,
+ iface, NULL);
+
+ return ret;
+}
+
+
+static void hostapd_afc_timeout_handler(void *eloop_ctx, void *timeout_ctx)
+{
+ struct hostapd_iface *iface = eloop_ctx;
+ int request_timeout;
+
+ iface->afc.data_valid = false;
+ if (!hostapd_afc_send_receive(iface, &request_timeout)) {
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ int i;
+
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+
+ if (chan->freq != iface->freq ||
+ (chan->flag & HOSTAPD_CHAN_DISABLED))
+ continue;
+
+ eloop_register_timeout(request_timeout, 0,
+ hostapd_afc_timeout_handler,
+ iface, NULL);
+ return;
+ }
+ }
+
+ /* Toggle interface to trigger new AFC connection */
+ iface->afc.completed = false;
+ hostapd_disable_iface(iface);
+ hostapd_enable_iface(iface);
+}
diff --git a/src/ap/ap_config.c b/src/ap/ap_config.c
index f760e340b..abefb83f0 100644
--- a/src/ap/ap_config.c
+++ b/src/ap/ap_config.c
@@ -1029,6 +1029,22 @@ void hostapd_config_free(struct hostapd_config *conf)
#endif /* CONFIG_ACS */
wpabuf_free(conf->lci);
wpabuf_free(conf->civic);
+#ifdef CONFIG_AFC
+ os_free(conf->afc.socket);
+ os_free(conf->afc.request.version);
+ os_free(conf->afc.request.id);
+ os_free(conf->afc.request.sn);
+ for (i = 0; i < conf->afc.n_cert_ids; i++) {
+ os_free(conf->afc.cert_ids[i].rulset);
+ os_free(conf->afc.cert_ids[i].id);
+ }
+ os_free(conf->afc.cert_ids);
+ os_free(conf->afc.location.height_type);
+ os_free(conf->afc.location.linear_polygon_data);
+ os_free(conf->afc.location.radial_polygon_data);
+ os_free(conf->afc.freq_range);
+ os_free(conf->afc.op_class);
+#endif /* CONFIG_AFC */
os_free(conf);
}
diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index de02ddafd..fb04cbb73 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -1217,6 +1217,53 @@ struct hostapd_config {
MBSSID_ENABLED = 1,
ENHANCED_MBSSID_ENABLED = 2,
} mbssid;
+
+#ifdef CONFIG_AFC
+ struct {
+ char *socket;
+ struct {
+ char *version;
+ char *id;
+ char *sn;
+ } request;
+ unsigned int n_cert_ids;
+ struct cert_id {
+ char *rulset;
+ char *id;
+ } *cert_ids;
+ struct {
+ enum afc_location_type {
+ ELLIPSE,
+ LINEAR_POLYGON,
+ RADIAL_POLYGON,
+ } type;
+ unsigned int n_linear_polygon_data;
+ struct afc_linear_polygon {
+ double longitude;
+ double latitude;
+ } *linear_polygon_data;
+ unsigned int n_radial_polygon_data;
+ struct afc_radial_polygon {
+ double length;
+ double angle;
+ } *radial_polygon_data;
+ int major_axis;
+ int minor_axis;
+ int orientation;
+ double height;
+ char *height_type;
+ int vertical_tolerance;
+ } location;
+ unsigned int n_freq_range;
+ struct afc_freq_range {
+ int low_freq;
+ int high_freq;
+ } *freq_range;
+ unsigned int n_op_class;
+ unsigned int *op_class;
+ int min_power;
+ } afc;
+#endif /* CONFIG_AFC */
};
diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index ddbcabc49..d0ea86811 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -2415,6 +2415,16 @@ static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
}
#endif /* CONFIG_MESH */
+#ifdef CONFIG_AFC
+ /* check AFC for 6GHz channels. */
+ res = hostapd_afc_handle_request(iface);
+ if (res <= 0) {
+ if (res < 0)
+ goto fail;
+ return res;
+ }
+#endif /* CONFIG_AFC */
+
if (!delay_apply_cfg &&
hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
hapd->iconf->channel,
@@ -2847,6 +2857,10 @@ void hostapd_interface_free(struct hostapd_iface *iface)
os_free(iface->bss[j]);
}
hostapd_cleanup_iface(iface);
+#ifdef CONFIG_AFC
+ os_free(iface->afc.chan_info_list);
+ os_free(iface->afc.freq_range);
+#endif
}
@@ -4423,3 +4437,42 @@ struct hostapd_data * hostapd_mld_get_link_bss(struct hostapd_data *hapd,
return NULL;
}
#endif /* CONFIG_IEEE80211BE */
+
+
+void hostap_afc_disable_channels(struct hostapd_iface *iface)
+{
+#ifdef CONFIG_AFC
+ struct hostapd_hw_modes *mode;
+ int i;
+
+ if (iface->num_hw_features < HOSTAPD_MODE_IEEE80211A)
+ return;
+
+ if (!he_reg_is_sp(iface->conf->he_6ghz_reg_pwr_type))
+ return;
+
+ mode = &iface->hw_features[HOSTAPD_MODE_IEEE80211A];
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+ int j;
+
+ if (!is_6ghz_freq(iface->freq))
+ continue;
+
+ for (j = 0; j < iface->afc.num_freq_range; j++) {
+ if (chan->freq >= iface->afc.freq_range[j].low_freq ||
+ chan->freq <= iface->afc.freq_range[j].high_freq)
+ break;
+ }
+ if (j && j == iface->afc.num_freq_range)
+ chan->flag |= HOSTAPD_CHAN_DISABLED;
+
+ for (j = 0; j < iface->afc.num_chan_info; j++) {
+ if (chan->chan == iface->afc.chan_info_list[j].chan)
+ break;
+ }
+ if (j && j == iface->afc.num_chan_info)
+ chan->flag |= HOSTAPD_CHAN_DISABLED;
+ }
+#endif /* CONFIG_AFC */
+}
diff --git a/src/ap/hostapd.h b/src/ap/hostapd.h
index 333955486..4b1feb1a8 100644
--- a/src/ap/hostapd.h
+++ b/src/ap/hostapd.h
@@ -674,9 +674,38 @@ struct hostapd_iface {
/* Configured freq of interface is NO_IR */
bool is_no_ir;
+
+#ifdef CONFIG_AFC
+ struct {
+ bool data_valid;
+ bool completed;
+ unsigned int num_freq_range;
+ struct afc_freq_range_elem {
+ int low_freq;
+ int high_freq;
+ /**
+ * max eirp power spectral density received from
+ * the AFC coordinator for this band
+ */
+ int max_psd;
+ } *freq_range;
+ unsigned int num_chan_info;
+ struct afc_chan_info_elem {
+ int chan;
+ /**
+ * max eirp power received from the AFC coordinator
+ * for this channel
+ */
+ int power;
+ } *chan_info_list;
+ } afc;
+#endif /* CONFIG_AFC */
};
/* hostapd.c */
+void hostap_afc_disable_channels(struct hostapd_iface *iface);
+int hostapd_afc_handle_request(struct hostapd_iface *iface);
+
int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
int (*cb)(struct hostapd_iface *iface,
void *ctx), void *ctx);
diff --git a/src/ap/hw_features.c b/src/ap/hw_features.c
index 596f2f020..62a53c269 100644
--- a/src/ap/hw_features.c
+++ b/src/ap/hw_features.c
@@ -116,6 +116,8 @@ int hostapd_get_hw_features(struct hostapd_iface *iface)
iface->hw_features = modes;
iface->num_hw_features = num_modes;
+ hostap_afc_disable_channels(iface);
+
for (i = 0; i < num_modes; i++) {
struct hostapd_hw_modes *feature = &modes[i];
int dfs_enabled = hapd->iconf->ieee80211h &&
--
2.43.2
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