--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Sat, 17 Feb 2024 11:24:44 +0100
+Subject: [PATCH] hostapd: afcd: add AFC daemon support
+
+Introduce Automated Frequency Coordination Daemon (AFCD) support
+for UNII-5 and UNII-7 6GHz bands.
+AFCD will be used by hostapd AFC client in order to forward the AFC
+request to the AFC coordinator and decouple AFC connection management
+from hostapd.
+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.
+AFCD is tested with AFC DUT Test Harness [0].
+Add afc-reply.json as reference for replies from the AFC coordinator.
+
+[0] https://github.com/Wi-FiTestSuite/AFC-DUT/tree/main
+
+Tested-by: Allen Ye <allen.ye@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+---
+ create mode 100644 afc/.gitignore
+ create mode 100644 afc/Makefile
+ create mode 100644 afc/afc-reply.json
+ create mode 100644 afc/afcd.c
+
+--- /dev/null
++++ b/afc/.gitignore
+@@ -0,0 +1 @@
++afcd
+--- /dev/null
++++ b/afc/Makefile
+@@ -0,0 +1,31 @@
++ALL=afcd
++
++include ../src/build.rules
++
++CFLAGS += -I../src/utils
++CFLAGS += -I../src
++
++OBJS=afcd.o
++OBJS += ../src/utils/common.o
++OBJS += ../src/utils/wpa_debug.o
++OBJS += ../src/utils/wpabuf.o
++
++ifndef CONFIG_OS
++ifdef CONFIG_NATIVE_WINDOWS
++CONFIG_OS=win32
++else
++CONFIG_OS=unix
++endif
++endif
++OBJS += ../src/utils/os_$(CONFIG_OS).o
++
++LIBS += -lcurl
++
++_OBJS_VAR := OBJS
++include ../src/objs.mk
++afcd: $(OBJS)
++ $(Q)$(LDO) $(LDFLAGS) -o afcd $(OBJS) $(LIBS)
++ @$(E) " LD " $@
++
++clean: common-clean
++ rm -f core *~
+--- /dev/null
++++ b/afc/afc-reply.json
+@@ -0,0 +1,215 @@
++{
++ "availableSpectrumInquiryResponses":[
++ {
++ "availabilityExpireTime":"2023-02-23T12:53:18Z",
++ "availableChannelInfo":[
++ {
++ "channelCfi":[
++ 1,
++ 5,
++ 9,
++ 13,
++ 17,
++ 21,
++ 25,
++ 29,
++ 33,
++ 37,
++ 41,
++ 45,
++ 49,
++ 53,
++ 57,
++ 61,
++ 65,
++ 69,
++ 73,
++ 77,
++ 81,
++ 85,
++ 89,
++ 93,
++ 117,
++ 121,
++ 125,
++ 129,
++ 133,
++ 137,
++ 141,
++ 145,
++ 149,
++ 153,
++ 157,
++ 161,
++ 165,
++ 169,
++ 173,
++ 177,
++ 181
++ ],
++ "globalOperatingClass":131,
++ "maxEirp":[
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5
++ ]
++ },
++ {
++ "channelCfi":[
++ 3,
++ 11,
++ 19,
++ 27,
++ 35,
++ 43,
++ 51,
++ 59,
++ 67,
++ 75,
++ 83,
++ 91,
++ 123,
++ 131,
++ 139,
++ 147,
++ 155,
++ 163,
++ 171,
++ 179
++ ],
++ "globalOperatingClass":132,
++ "maxEirp":[
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5
++ ]
++ },
++ {
++ "channelCfi":[
++ 7,
++ 23,
++ 39,
++ 55,
++ 71,
++ 87,
++ 135,
++ 151,
++ 167
++ ],
++ "globalOperatingClass":133,
++ "maxEirp":[
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5,
++ 5
++ ]
++ },
++ {
++ "channelCfi":[
++ 15,
++ 47,
++ 79,
++ 143
++ ],
++ "globalOperatingClass":134,
++ "maxEirp":[
++ 5,
++ 5,
++ 5,
++ 5
++ ]
++ },
++ {
++ "channelCfi":[
++ ],
++ "globalOperatingClass":135,
++ "maxEirp":[
++ ]
++ }
++ ],
++ "availableFrequencyInfo":[
++ {
++ "frequencyRange":{
++ "highFrequency":6425,
++ "lowFrequency":5925
++ },
++ "maxPSD":3.98970004336019
++ },
++ {
++ "frequencyRange":{
++ "highFrequency":6865,
++ "lowFrequency":6525
++ },
++ "maxPSD":3.98970004336019
++ }
++ ],
++ "requestId":"11235814",
++ "response":{
++ "responseCode":0,
++ "shortDescription":"Success"
++ },
++ "rulesetId":"US_47_CFR_PART_15_SUBPART_E"
++ }
++ ],
++ "version":"1.1"
++}
+--- /dev/null
++++ b/afc/afcd.c
+@@ -0,0 +1,292 @@
++/*
++ * Automated Frequency Coordination Daemon
++ * Copyright (c) 2024, Lorenzo Bianconi <lorenzo@kernel.org>
++ *
++ * This software may be distributed under the terms of the BSD license.
++ * See README for more details.
++ */
++
++#include <curl/curl.h>
++#include <sys/un.h>
++#include <sys/stat.h>
++
++#include "utils/includes.h"
++#include "utils/common.h"
++
++#define CURL_TIMEOUT 60
++#define AFCD_SOCK "afcd.sock"
++
++struct curl_ctx {
++ char *buf;
++ size_t buf_len;
++};
++
++static volatile bool exiting;
++
++static char *path = "/var/run";
++static char *bearer_token;
++static char *url;
++static int port = 443;
++
++
++static size_t afcd_curl_cb_write(void *ptr, size_t size, size_t nmemb,
++ void *userdata)
++{
++ struct curl_ctx *ctx = userdata;
++ char *buf;
++
++ buf = os_realloc(ctx->buf, ctx->buf_len + size * nmemb + 1);
++ if (!buf)
++ return 0;
++
++ ctx->buf = buf;
++ os_memcpy(buf + ctx->buf_len, ptr, size * nmemb);
++ buf[ctx->buf_len + size * nmemb] = '\0';
++ ctx->buf_len += size * nmemb;
++
++ return size * nmemb;
++}
++
++
++static int afcd_send_request(struct curl_ctx *ctx, unsigned char *request)
++{
++ struct curl_slist *headers = NULL;
++ CURL *curl;
++ int ret;
++
++ wpa_printf(MSG_DEBUG, "Sending AFC request to %s", url);
++
++ curl_global_init(CURL_GLOBAL_ALL);
++ curl = curl_easy_init();
++ if (!curl)
++ return -ENOMEM;
++
++ headers = curl_slist_append(headers, "Accept: application/json");
++ headers = curl_slist_append(headers,
++ "Content-Type: application/json");
++ headers = curl_slist_append(headers, "charset: utf-8");
++
++ curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
++ curl_easy_setopt(curl, CURLOPT_URL, url);
++ curl_easy_setopt(curl, CURLOPT_PORT, port);
++ curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
++ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
++ afcd_curl_cb_write);
++ curl_easy_setopt(curl, CURLOPT_WRITEDATA, ctx);
++ curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcrp/0.1");
++ curl_easy_setopt(curl, CURLOPT_TIMEOUT, CURL_TIMEOUT);
++ curl_easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
++ if (bearer_token)
++ curl_easy_setopt(curl, CURLOPT_XOAUTH2_BEARER, bearer_token);
++ curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BEARER);
++ curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
++ curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 1L);
++ curl_easy_setopt(curl, CURLOPT_POSTFIELDS, request);
++ curl_easy_setopt(curl, CURLOPT_SSL_VERIFYSTATUS, 1L);
++
++ ret = curl_easy_perform(curl);
++ if (ret != CURLE_OK)
++ wpa_printf(MSG_ERROR, "curl_easy_perform failed: %s",
++ curl_easy_strerror(ret));
++
++ curl_easy_cleanup(curl);
++ curl_global_cleanup();
++
++ return ret == CURLE_OK ? 0 : -EINVAL;
++}
++
++
++static void handle_term(int sig)
++{
++ wpa_printf(MSG_ERROR, "Received signal %d", sig);
++ exiting = true;
++}
++
++
++static void usage(void)
++{
++ wpa_printf(MSG_ERROR,
++ "%s:\n"
++ "afcd -u<url> [-p<port>][-t<token>][-D<unix-sock dir>][-P<PID file>][-dB]",
++ __func__);
++}
++
++
++#define BUFSIZE 8192
++static int afcd_server_run(void)
++{
++ size_t len = os_strlen(path) + 1 + os_strlen(AFCD_SOCK);
++ struct sockaddr_un addr = {
++ .sun_family = AF_UNIX,
++#ifdef __FreeBSD__
++ .sun_len = sizeof(addr),
++#endif /* __FreeBSD__ */
++ };
++ int sockfd, ret = 0;
++ char *fname = NULL;
++ unsigned char *buf;
++ fd_set read_set;
++
++ if (len >= sizeof(addr.sun_path))
++ return -EINVAL;
++
++ if (mkdir(path, S_IRWXU | S_IRWXG) < 0 && errno != EEXIST)
++ return -EINVAL;
++
++ buf = os_malloc(BUFSIZE);
++ if (!buf)
++ return -ENOMEM;
++
++ fname = os_malloc(len + 1);
++ if (!fname) {
++ ret = -ENOMEM;
++ goto free_buf;
++ }
++
++ os_snprintf(fname, len + 1, "%s/%s", path, AFCD_SOCK);
++ fname[len] = '\0';
++ os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
++
++ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
++ if (sockfd < 0) {
++ wpa_printf(MSG_ERROR, "Failed creating socket");
++ ret = -errno;
++ goto unlink;
++ }
++
++ if (bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
++ wpa_printf(MSG_ERROR, "Failed to bind socket");
++ ret = -errno;
++ goto close;
++ }
++
++ if (listen(sockfd, 10) < 0) {
++ wpa_printf(MSG_ERROR, "Failed to listen on socket");
++ ret = -errno;
++ goto close;
++ }
++
++ FD_ZERO(&read_set);
++ while (!exiting) {
++ socklen_t addr_len = sizeof(addr);
++ struct sockaddr_in6 c_addr;
++ struct timeval timeout = {
++ .tv_sec = 1,
++ };
++ struct curl_ctx ctx = {};
++ int fd;
++
++ FD_SET(sockfd, &read_set);
++ if (select(sockfd + 1, &read_set, NULL, NULL, &timeout) < 0) {
++ if (errno != EINTR) {
++ wpa_printf(MSG_ERROR,
++ "Select failed on socket");
++ ret = -errno;
++ break;
++ }
++ continue;
++ }
++
++ if (!FD_ISSET(sockfd, &read_set))
++ continue;
++
++ fd = accept(sockfd, (struct sockaddr *)&c_addr,
++ &addr_len);
++ if (fd < 0) {
++ if (errno != EINTR) {
++ wpa_printf(MSG_ERROR,
++ "Failed accepting connections");
++ ret = -errno;
++ break;
++ }
++ continue;
++ }
++
++ os_memset(buf, 0, BUFSIZE);
++ if (recv(fd, buf, BUFSIZE - 1, 0) <= 0) {
++ close(fd);
++ continue;
++ }
++
++ wpa_printf(MSG_DEBUG, "Received request: %s", buf);
++ if (!afcd_send_request(&ctx, buf)) {
++ wpa_printf(MSG_DEBUG, "Received reply: %s", ctx.buf);
++ send(fd, ctx.buf, ctx.buf_len, MSG_NOSIGNAL);
++ free(ctx.buf);
++ }
++ close(fd);
++ }
++close:
++ close(sockfd);
++unlink:
++ unlink(fname);
++ os_free(fname);
++free_buf:
++ os_free(buf);
++
++ return ret;
++}
++
++
++int main(int argc, char **argv)
++{
++ bool daemonize = false;
++ char *pid_file = NULL;
++
++ if (os_program_init())
++ return -1;
++
++ for (;;) {
++ int c = getopt(argc, argv, "u:p:t:D:P:hdB");
++
++ if (c < 0)
++ break;
++
++ switch (c) {
++ case 'h':
++ usage();
++ return 0;
++ case 'B':
++ daemonize = true;
++ break;
++ case 'D':
++ path = optarg;
++ break;
++ case 'P':
++ os_free(pid_file);
++ pid_file = os_rel2abs_path(optarg);
++ break;
++ case 'u':
++ url = optarg;
++ break;
++ case 'p':
++ port = atoi(optarg);
++ break;
++ case 'd':
++ if (wpa_debug_level > 0)
++ wpa_debug_level--;
++ break;
++ case 't':
++ bearer_token = optarg;
++ break;
++ default:
++ usage();
++ return -EINVAL;
++ }
++ }
++
++ if (!url) {
++ usage();
++ return -EINVAL;
++ }
++
++ if (daemonize && os_daemonize(pid_file)) {
++ wpa_printf(MSG_ERROR, "daemon: %s", strerror(errno));
++ return -EINVAL;
++ }
++
++ signal(SIGTERM, handle_term);
++ signal(SIGINT, handle_term);
++
++ return afcd_server_run();
++}
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Wed, 17 Jan 2024 15:25:08 +0100
+Subject: [PATCH] hostapd: ap: add AFC client support
+
+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.
+AFC hostapd client is tested with AFC DUT Test Harness [0].
+
+[0] https://github.com/Wi-FiTestSuite/AFC-DUT/tree/main
+
+Tested-by: Allen Ye <allen.ye@mediatek.com>
+---
+ create mode 100644 src/ap/afc.c
+
+--- a/hostapd/Makefile
++++ b/hostapd/Makefile
+@@ -108,6 +108,14 @@ CFLAGS += -DCONFIG_TAXONOMY
+ OBJS += ../src/ap/taxonomy.o
+ endif
+
++ifdef CONFIG_IEEE80211AX
++ifdef CONFIG_AFC
++CFLAGS += -DCONFIG_AFC
++OBJS += ../src/ap/afc.o
++LIBS += -ljson-c
++endif
++endif
++
+ ifdef CONFIG_MODULE_TESTS
+ CFLAGS += -DCONFIG_MODULE_TESTS
+ OBJS += hapd_module_tests.o
+--- a/hostapd/config_file.c
++++ b/hostapd/config_file.c
+@@ -1283,6 +1283,190 @@ static int hostapd_parse_he_srg_bitmap(u
+ return 0;
+ }
+
++
++#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 */
+ #endif /* CONFIG_IEEE80211AX */
+
+
+@@ -3888,6 +4072,83 @@ static int hostapd_config_fill(struct ho
+ 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) {
+--- a/hostapd/defconfig
++++ b/hostapd/defconfig
+@@ -438,3 +438,6 @@ 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
+--- 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
+--- /dev/null
++++ b/src/ap/afc.c
+@@ -0,0 +1,979 @@
++/*
++ * Automated Frequency Coordination
++ * Copyright (c) 2024, Lorenzo Bianconi <lorenzo@kernel.org>
++ *
++ * 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"
++#include "hw_features.h"
++
++#define HOSTAPD_AFC_RETRY_TIMEOUT 180
++#define HOSTAPD_AFC_TIMEOUT 86400 /* 24h */
++#define HOSTAPD_AFC_BUFSIZE 4096
++
++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 struct json_object * hostapd_afc_get_opclass_chan_list(u8 op_class)
++{
++ struct json_object *chan_list_obj, *str_obj;
++ const struct oper_class_map *oper_class;
++ int chan_offset, chan;
++
++ oper_class = get_oper_class(NULL, op_class);
++ if (!oper_class)
++ return NULL;
++
++ chan_list_obj = json_object_new_array();
++ if (!chan_list_obj)
++ return NULL;
++
++ switch (op_class) {
++ case 132: /* 40MHz */
++ chan_offset = 2;
++ break;
++ case 133: /* 80MHz */
++ chan_offset = 6;
++ break;
++ case 134: /* 160MHz */
++ chan_offset = 14;
++ break;
++ default:
++ chan_offset = 0;
++ break;
++ }
++
++ for (chan = oper_class->min_chan; chan <= oper_class->max_chan;
++ chan += oper_class->inc) {
++ str_obj = json_object_new_int(chan + chan_offset);
++ if (!str_obj) {
++ json_object_put(chan_list_obj);
++ return NULL;
++ }
++ json_object_array_add(chan_list_obj, str_obj);
++ }
++
++ return chan_list_obj;
++}
++
++
++static struct json_object *
++hostapd_afc_build_req_chan_list(struct hostapd_iface *iface)
++{
++ struct json_object *op_class_list_obj, *str_obj;
++ struct hostapd_config *iconf = iface->conf;
++ int i;
++
++ op_class_list_obj = json_object_new_array();
++ if (!op_class_list_obj)
++ return NULL;
++
++ for (i = 0; i < iconf->afc.n_op_class; i++) {
++ struct json_object *op_class_obj, *chan_list_obj;
++ u8 op_class = iconf->afc.op_class[i];
++
++ if (!is_6ghz_op_class(op_class))
++ 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(op_class);
++ if (!str_obj)
++ goto error;
++
++ json_object_object_add(op_class_obj, "globalOperatingClass",
++ str_obj);
++
++ chan_list_obj = hostapd_afc_get_opclass_chan_list(op_class);
++ if (!chan_list_obj)
++ goto error;
++
++ json_object_object_add(op_class_obj, "channelCfi",
++ chan_list_obj);
++ }
++
++ return op_class_list_obj;
++
++error:
++ json_object_put(op_class_list_obj);
++ return NULL;
++}
++
++
++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_config *iconf = iface->conf;
++ struct json_object *op_class_list_obj;
++ 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);
++ }
++ }
++
++ op_class_list_obj = hostapd_afc_build_req_chan_list(iface);
++ if (!op_class_list_obj)
++ goto error;
++
++ json_object_object_add(l2_obj, "inquiredChannels", op_class_list_obj);
++
++ wpa_printf(MSG_DEBUG, "Pending AFC request: %s",
++ json_object_get_string(l1_obj));
++
++ return l1_obj;
++
++error:
++ 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 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 (!range_elem_obj)
++ continue;
++
++ 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);
++ }
++ iface->afc.freq_range = f;
++ iface->afc.num_freq_range = count;
++
++ return 0;
++}
++
++
++static int hostad_afc_update_chan_info(struct afc_chan_info_elem **chan_list,
++ int *chan_list_size, u8 op_class,
++ int center_chan, int power)
++{
++ int num_low_subchan, ch, count = *chan_list_size;
++ struct afc_chan_info_elem *c = *chan_list;
++
++ switch (op_class) {
++ case 132: /* 40MHz */
++ num_low_subchan = 2;
++ break;
++ case 133: /* 80MHz */
++ num_low_subchan = 6;
++ break;
++ case 134: /* 160MHz */
++ num_low_subchan = 14;
++ break;
++ default:
++ num_low_subchan = 0;
++ break;
++ }
++
++ for (ch = center_chan - num_low_subchan;
++ ch <= center_chan + num_low_subchan; ch += 4) {
++ int i;
++
++ for (i = 0; i < count; i++) {
++ if (c[i].chan == ch)
++ break;
++ }
++
++ if (i == count) {
++ c = os_realloc_array(c, count + 1, sizeof(*c));
++ if (!c)
++ return -ENOMEM;
++
++ c[count].chan = ch;
++ c[count++].power = power;
++ }
++ }
++
++ *chan_list_size = count;
++ *chan_list = c;
++
++ return 0;
++}
++
++
++static int
++hostad_afc_parse_available_chan_info(struct hostapd_iface *iface,
++ struct json_object *reply_elem_obj)
++{
++ struct afc_chan_info_elem *c = NULL;
++ struct json_object *obj;
++ int i, count = 0;
++
++ if (!json_object_object_get_ex(reply_elem_obj,
++ "availableChannelInfo", &obj))
++ return 0;
++
++ for (i = 0; i < json_object_array_length(obj); i++) {
++ struct json_object *range_elem_obj, *op_class_obj;
++ struct json_object *chan_cfi_obj, *max_eirp_obj;
++ int ch, op_class;
++
++ range_elem_obj = json_object_array_get_idx(obj, i);
++ if (!range_elem_obj)
++ continue;
++
++ if (!json_object_object_get_ex(range_elem_obj,
++ "globalOperatingClass",
++ &op_class_obj))
++ 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;
++
++ op_class = json_object_get_int(op_class_obj);
++ 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);
++
++ hostad_afc_update_chan_info(&c, &count, op_class,
++ channel, power);
++ }
++ iface->afc.chan_info_list = c;
++ iface->afc.num_chan_info = count;
++ }
++
++ 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)
++{
++ struct json_object *payload_obj, *reply_obj, *version_obj;
++ struct hostapd_config *iconf = iface->conf;
++ int i, request_timeout = -1, ret = -EINVAL;
++
++ 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 (request_timeout < 0 || timeout < request_timeout)
++ request_timeout = timeout;
++ }
++
++ ret = status;
++ }
++
++ iface->afc.data_valid = true;
++ iface->afc.timeout = request_timeout;
++ if (iface->afc.timeout < 0)
++ iface->afc.timeout = HOSTAPD_AFC_RETRY_TIMEOUT;
++
++ return ret;
++}
++
++
++static int hostapd_afc_send_receive(struct hostapd_iface *iface)
++{
++ struct hostapd_config *iconf = iface->conf;
++ json_object *request_obj = NULL;
++ struct timeval sock_timeout = {
++ .tv_sec = 5,
++ };
++ 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;
++
++ if (iface->afc.data_valid) {
++ /* AFC data already downloaded from the server */
++ return 0;
++ }
++
++ if (!iconf->afc.socket) {
++ wpa_printf(MSG_ERROR, "Missing AFC socket string");
++ return -EINVAL;
++ }
++
++ iface->afc.timeout = HOSTAPD_AFC_RETRY_TIMEOUT;
++ 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) - 1, 0);
++ if (ret <= 0)
++ goto close_sock;
++
++ ret = hostapd_afc_parse_reply(iface, buf);
++close_sock:
++ json_object_put(request_obj);
++ close(sockfd);
++
++ return ret;
++}
++
++
++static bool hostapd_afc_has_usable_chans(struct hostapd_iface *iface)
++{
++ const struct oper_class_map *oper_class;
++ int ch;
++
++ oper_class = get_oper_class(NULL, iface->conf->op_class);
++ if (!oper_class)
++ return false;
++
++ for (ch = oper_class->min_chan; ch <= oper_class->max_chan;
++ ch += oper_class->inc) {
++ 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->chan == ch &&
++ !(chan->flag & HOSTAPD_CHAN_DISABLED))
++ return true;
++ }
++ }
++
++ return false;
++}
++
++
++int hostapd_afc_handle_request(struct hostapd_iface *iface)
++{
++ struct hostapd_config *iconf = iface->conf;
++ int ret;
++
++ /* 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;
++
++ if (iface->state == HAPD_IFACE_ACS)
++ return 1;
++
++ ret = hostapd_afc_send_receive(iface);
++ if (ret < 0) {
++ /*
++ * If the connection to the AFCD failed, resched for a
++ * future attempt.
++ */
++ wpa_printf(MSG_ERROR, "AFC connection failed: %d", ret);
++ if (ret == -EIO)
++ ret = 0;
++ goto resched;
++ }
++
++ hostap_afc_disable_channels(iface);
++ if (!hostapd_afc_has_usable_chans(iface))
++ goto resched;
++
++ /* Trigger an ACS freq scan */
++ iconf->channel = 0;
++ iface->freq = 0;
++
++ if (acs_init(iface) != HOSTAPD_CHAN_ACS) {
++ wpa_printf(MSG_ERROR, "Could not start ACS");
++ ret = -EINVAL;
++ }
++
++resched:
++ eloop_cancel_timeout(hostapd_afc_timeout_handler, iface, NULL);
++ eloop_register_timeout(iface->afc.timeout, 0,
++ hostapd_afc_timeout_handler, iface, NULL);
++
++ return ret;
++}
++
++
++static void hostapd_afc_delete_data_from_server(struct hostapd_iface *iface)
++{
++ os_free(iface->afc.chan_info_list);
++ os_free(iface->afc.freq_range);
++
++ iface->afc.num_freq_range = 0;
++ iface->afc.num_chan_info = 0;
++
++ iface->afc.chan_info_list = NULL;
++ iface->afc.freq_range = NULL;
++
++ iface->afc.data_valid = false;
++}
++
++
++static void hostapd_afc_timeout_handler(void *eloop_ctx, void *timeout_ctx)
++{
++ struct hostapd_iface *iface = eloop_ctx;
++ bool restart_iface = true;
++
++ hostapd_afc_delete_data_from_server(iface);
++ if (iface->state != HAPD_IFACE_ENABLED) {
++ /* Hostapd is not fully enabled yet, toogle the interface */
++ goto restart_interface;
++ }
++
++ if (hostapd_afc_send_receive(iface) < 0 ||
++ hostapd_get_hw_features(iface)) {
++ restart_iface = false;
++ goto restart_interface;
++ }
++
++ if (hostapd_is_usable_chans(iface))
++ goto resched;
++
++ restart_iface = hostapd_afc_has_usable_chans(iface);
++ if (restart_iface) {
++ /* Trigger an ACS freq scan */
++ iface->conf->channel = 0;
++ iface->freq = 0;
++ }
++
++restart_interface:
++ hostapd_disable_iface(iface);
++ if (restart_iface)
++ hostapd_enable_iface(iface);
++resched:
++ eloop_register_timeout(iface->afc.timeout, 0,
++ hostapd_afc_timeout_handler, iface, NULL);
++}
++
++
++void hostapd_afc_stop(struct hostapd_iface *iface)
++{
++ eloop_cancel_timeout(hostapd_afc_timeout_handler, iface, NULL);
++}
++
++
++void hostap_afc_disable_channels(struct hostapd_iface *iface)
++{
++ 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;
++
++ if (!iface->afc.data_valid)
++ 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(chan->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 != iface->afc.num_freq_range)
++ continue;
++
++ for (j = 0; j < iface->afc.num_chan_info; j++) {
++ if (chan->chan == iface->afc.chan_info_list[j].chan)
++ break;
++ }
++
++ if (j != iface->afc.num_chan_info)
++ continue;
++
++ chan->flag |= HOSTAPD_CHAN_DISABLED;
++ }
++}
+--- a/src/ap/ap_config.c
++++ b/src/ap/ap_config.c
+@@ -1033,6 +1033,22 @@ void hostapd_config_free(struct hostapd_
+ #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);
+ }
+--- a/src/ap/ap_config.h
++++ b/src/ap/ap_config.h
+@@ -1225,6 +1225,53 @@ 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 */
+ };
+
+
+--- a/src/ap/hostapd.c
++++ b/src/ap/hostapd.c
+@@ -683,6 +683,7 @@ static void sta_track_deinit(struct host
+ void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
+ {
+ wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
++ hostapd_afc_stop(iface);
+ eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
+ #ifdef NEED_AP_MLME
+ hostapd_stop_setup_timers(iface);
+@@ -2449,6 +2450,16 @@ static int hostapd_setup_interface_compl
+ }
+ #endif /* CONFIG_MESH */
+
++#ifdef CONFIG_IEEE80211AX
++ /* check AFC for 6GHz channels. */
++ res = hostapd_afc_handle_request(iface);
++ if (res <= 0) {
++ if (res < 0)
++ goto fail;
++ return res;
++ }
++#endif /* CONFIG_IEEE80211AX */
++
+ if (!delay_apply_cfg &&
+ hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
+ hapd->iconf->channel,
+@@ -2846,6 +2857,7 @@ void hostapd_interface_deinit(struct hos
+
+ hostapd_set_state(iface, HAPD_IFACE_DISABLED);
+
++ hostapd_afc_stop(iface);
+ eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
+ iface->wait_channel_update = 0;
+ iface->is_no_ir = false;
+@@ -2881,6 +2893,10 @@ void hostapd_interface_free(struct hosta
+ __func__, iface->bss[j]);
+ os_free(iface->bss[j]);
+ }
++#ifdef CONFIG_AFC
++ os_free(iface->afc.chan_info_list);
++ os_free(iface->afc.freq_range);
++#endif
+ hostapd_cleanup_iface(iface);
+ }
+
+--- a/src/ap/hostapd.h
++++ b/src/ap/hostapd.h
+@@ -702,9 +702,54 @@ struct hostapd_iface {
+
+ /* Configured freq of interface is NO_IR */
+ bool is_no_ir;
++
++#ifdef CONFIG_AFC
++ struct {
++ int timeout;
++ 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;
++ bool data_valid;
++ } afc;
++#endif /* CONFIG_AFC */
+ };
+
+ /* hostapd.c */
++#ifdef CONFIG_AFC
++int hostapd_afc_handle_request(struct hostapd_iface *iface);
++void hostapd_afc_stop(struct hostapd_iface *iface);
++void hostap_afc_disable_channels(struct hostapd_iface *iface);
++#else
++static inline int hostapd_afc_handle_request(struct hostapd_iface *iface)
++{
++ return 1;
++}
++
++static inline void hostapd_afc_stop(struct hostapd_iface *iface)
++{
++}
++
++static inline void hostap_afc_disable_channels(struct hostapd_iface *iface)
++{
++}
++#endif /* CONFIG_AFC */
++
+ int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
+ int (*cb)(struct hostapd_iface *iface,
+ void *ctx), void *ctx);
+--- a/src/ap/hw_features.c
++++ b/src/ap/hw_features.c
+@@ -114,6 +114,8 @@ int hostapd_get_hw_features(struct hosta
+ 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 &&
projects / openwrt / staging / nbd.git / commitdiff