config.c

	rv = uci_load(ctx, UCI_AGENT, &pkg);
	if (rv)
		return -1;

	s = config_add_section(ctx, pkg, UCI_AGENT, UCI_BK_AGENT, "device",
			device);
	if (!s)
		return -1;

	if (band == BAND_2)
		set_value(ctx, pkg, s, "band", "2", UCI_TYPE_STRING);
	else if (band == BAND_5)
		set_value(ctx, pkg, s, "band", "5", UCI_TYPE_STRING);

	set_value(ctx, pkg, s, "ifname", ifname, UCI_TYPE_STRING);
	uci_commit(ctx, &pkg, false);
	uci_unload(ctx, pkg);
	return 0;
}

int config_find_radio(struct agent_config *cfg, struct uci_context *ctx,
		char *radio)
{
	struct uci_package *pkg;
	struct uci_section *s;
	struct uci_element *e;
	bool found = false;
	int rv;

	rv = uci_load(ctx, UCI_AGENT, &pkg);
	if (rv)
		return found;

	s = config_get_section(ctx, pkg, "wifi-radio", "device", radio);
	if (s)
		found = true;

	uci_unload(ctx, pkg);
	return found;
}

static void wifi_radio_status_cb(struct ubus_request *req, int type,
		struct blob_attr *msg)
{
	struct blob_attr *tb[1];
	static const struct blobmsg_policy ap_attr[1] = {
		[0] = { .name = "band", .type = BLOBMSG_TYPE_STRING },
	};
	char band_str[8] = {0};
	uint8_t *band = req->priv;

	blobmsg_parse(ap_attr, 1, tb, blob_data(msg), blob_len(msg));

	if (!tb[0])
		return;

	strncpy(band_str, blobmsg_data(tb[0]), sizeof(band_str));

	if (!strncmp(band_str, "5GHz", sizeof(band_str)))
		*band = BAND_5;
	else if (!strncmp(band_str, "2.4GHz", sizeof(band_str)))
		*band = BAND_2;
	else
		*band = BAND_UNKNOWN;
}

void config_disable_bstas(struct agent_config *cfg)
{
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_section *section;
	struct netif_bkcfg *bk;
	bool reload = false;


	list_for_each_entry(bk, &cfg->bklist, list) {
		/* only disable onboarded bsta */
//		if (!bk->cfg->onboarded)
//			continue;

		/* disable from wireless config */
		pkg = uci_load_pkg(&ctx, UCI_WIRELESS);
		if (!pkg)
			continue;

		section = config_get_section(ctx, pkg, UCI_WLAN_IFACE, "ifname", bk->name);
		if (!section) {
			uci_unload(ctx, pkg);
			continue;
		}

		set_value(ctx, pkg, section, "disabled", "1", UCI_TYPE_STRING);
		uci_save(ctx, pkg);
		reload = true;
	}

	if (reload) {
		uci_commit(ctx, &pkg, false);
		uci_unload(ctx, pkg);
	}


	list_for_each_entry(bk, &cfg->bklist, list) {
		pkg = uci_load_pkg(&ctx, UCI_AGENT);
		if (!pkg)
			continue;

		section = config_get_section(ctx, pkg, UCI_BK_AGENT, "ifname", bk->name);
		if (!section) {
			uci_unload(ctx, pkg);
			continue;
		}

		set_value(ctx, pkg, section, "enabled", "0", UCI_TYPE_STRING);
		uci_save(ctx, pkg);
		bk->enabled = 0;
	}

	if (reload) {
		uci_commit(ctx, &pkg, false);
		uci_reload_services("wireless");
	}

	uci_free_context(ctx);
}

int config_disable_bsta(struct netif_bkcfg *bk)
{
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_section *section;
	int ret = -1;

	/* disable mapagent bk-iface section */
	pkg = uci_load_pkg(&ctx, UCI_AGENT);
	if (!pkg)
		return -1;

	section = config_get_section(ctx, pkg, UCI_BK_AGENT, "ifname", bk->name);
	if (!section)
		goto out_pkg;

	set_value(ctx, pkg, section, "enabled", "0", UCI_TYPE_STRING);
	uci_save(ctx, pkg);
	bk->enabled = 0;
	uci_commit(ctx, &pkg, false);
	uci_unload(ctx, pkg);

	/* disable wireless config bsta wifi-iface section */
	pkg = uci_load_pkg(&ctx, UCI_WIRELESS);
	if (!pkg)
		goto out;

	section = config_get_section(ctx, pkg, UCI_WLAN_IFACE, "ifname", bk->name);
	if (!section)
		goto out_pkg;

	set_value(ctx, pkg, section, "disabled", "1", UCI_TYPE_STRING);
	uci_save(ctx, pkg);
	uci_commit(ctx, &pkg, false);
	ret = 0;

out_pkg:
	uci_unload(ctx, pkg);
out:
	uci_free_context(ctx);
	return ret;
}

bool config_find_bsta_agent(struct agent_config *cfg, struct uci_context *ctx,
		char *device)
{
	struct uci_package *pkg;
	struct uci_element *e;
	struct uci_section *section = NULL;
	int rv;
	bool found = false;

	rv = uci_load(ctx, UCI_AGENT, &pkg);
	if (rv)
		return found;

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);
		char *c_device;

		if (strncmp(s->type, UCI_BK_AGENT, strlen(UCI_BK_AGENT)))
			continue;

		c_device = uci_lookup_option_string(ctx, s, "device");
		if (!c_device)
			continue;

		if (strncmp(device, c_device, 16))
			continue;

		found = true;
		break;
	}

	uci_unload(ctx, pkg);
	return found;
}

struct uci_section *config_find_bsta_wireless(struct agent_config *cfg,
		struct uci_context *ctx, struct uci_package *pkg, const char *device)
{
	struct uci_element *e;
	int rv;

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);
		char *c_device, *mode;

		if (strncmp(s->type, UCI_WLAN_IFACE, strlen(UCI_WLAN_IFACE)))
			continue;

		c_device = uci_lookup_option_string(ctx, s, "device");
		if (!c_device || strncmp(device, c_device, 16))
			continue;

		mode = uci_lookup_option_string(ctx, s, "mode");
		if (!mode || strcmp(mode, "sta"))
			continue;

		return s;
	}


	return NULL;
}

int agent_config_prepare(struct agent_config *cfg)
{
	// TODO: iterate through 'wifi-device' sections in wireless config.
	// If corresponding 'wifi-radio <device-name>' section is not available
	// in 'mapagent' config, create one. Check supported bands of the new
	// wifi-device and add option 'band' to the wifi-radio section.
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_element *e;
	struct blob_buf bb = {0};

	pkg = uci_load_pkg(&ctx, UCI_WIRELESS);
	if (!pkg)
		return -1;

	blob_buf_init(&bb, 0);

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);
		struct uci_section *wl_s;
		const char *device, *ifname;
		uint8_t band = 0;
		char obj_name[64] = {0};
		int rv;

		if (strncmp(s->type, UCI_WL_DEVICE, strlen(UCI_WL_DEVICE)))
			continue;

		device = s->e.name;

		snprintf(obj_name, sizeof(obj_name), "wifi.radio.%s",
				device);
		rv = ubus_call(obj_name, "status", &bb,
				wifi_radio_status_cb, &band);
		if (rv)
			continue;

		if (!config_find_radio(cfg, ctx, device))
			config_generate_radio(cfg, ctx, device, band);

		if (config_find_bsta_agent(cfg, ctx, device))
			continue;

		wl_s = config_find_bsta_wireless(cfg, ctx, pkg, device);
		if (!wl_s)
			continue;

		ifname = uci_lookup_option_string(ctx, wl_s, "ifname");
		if (!ifname)
			continue;

		config_generate_bsta_agent(cfg, ctx, device, ifname, band);
	}

	blob_buf_free(&bb);
	uci_unload(ctx, pkg);
	uci_free_context(ctx);
	return 0;
}

int agent_config_init(struct agent_config *cfg)
{
	INIT_LIST_HEAD(&cfg->fhlist);
	INIT_LIST_HEAD(&cfg->bklist);
	INIT_LIST_HEAD(&cfg->radiolist);
	INIT_LIST_HEAD(&cfg->steer_excludelist);
	INIT_LIST_HEAD(&cfg->steer_btm_excludelist);

	agent_config_prepare(cfg);
	agent_config_reload(cfg);
	return 0;
}

void clean_bk(struct netif_bkcfg *p)
{
	list_del(&p->list);
	free(p);
}

int clean_all_bk(struct agent_config *cfg)
{
	struct netif_bkcfg *p, *tmp;

	list_for_each_entry_safe(p, tmp, &cfg->bklist, list)
		clean_bk(p);

	return 0;
}

void clean_fh(struct netif_fhcfg *p)
{
	list_del(&p->list);
	free(p);
}

int clean_all_fh(struct agent_config *cfg)
{
	struct netif_fhcfg *p, *tmp;

	list_for_each_entry_safe(p, tmp, &cfg->fhlist, list)
		clean_fh(p);

	return 0;
}

void clean_radio_cfg(struct agent_config_radio *p)
{
	list_del(&p->list);
	free(p);
}

int clean_all_radios(struct agent_config *cfg)
{
	struct agent_config_radio *p, *tmp;

	list_for_each_entry_safe(p, tmp, &cfg->radiolist, list)
		clean_radio_cfg(p);

	return 0;
}

int agent_config_clean(struct agent_config *cfg)
{
	clean_all_fh(cfg);
	clean_all_bk(cfg);
	clean_steer_btm_excl(cfg);
	clean_steer_excl(cfg);
	clean_all_radios(cfg);
	if (cfg->pcfg)
		free(cfg->pcfg);

	return 0;
}

int wifi_reorder_interfaces_by_device(struct agent_config *ac,
		struct uci_context *ctx, struct uci_package *pkg, char *device)
{
	int i, j = 0;
	int devnum = 0;
	char ifname[IFNAMSIZ] = {0};
	enum {
		W_IFNAME,
		NUM_POLICIES
	};
	const struct uci_parse_option opts[] = {
		{ .name = "ifname", .type = UCI_TYPE_STRING }
	};
	struct uci_option *tb[NUM_POLICIES];
	struct uci_element *e;

	trace("reordering interfaces for device %s\n", device);

	devnum = get_device_num_from_name(device);
	snprintf(ifname, IFNAMSIZ, "%s%d",
			ac->netdev,
			devnum);

	for (i = 1; i < 16; i++) {
		trace("iterating in search of %s\n", ifname);
		uci_foreach_element(&pkg->sections, e) {
			struct uci_section *s = uci_to_section(e);

			if (strncmp(s->type, UCI_WLAN_IFACE,
					strlen(UCI_WLAN_IFACE)))
				continue;

			uci_parse_section(s, opts, NUM_POLICIES, tb);

			if (!tb[W_IFNAME])
				continue;

			if (strncmp(tb[W_IFNAME]->v.string, ifname, sizeof(ifname)))
				continue;
			trace("found interface %s, reordering to %d\n", ifname, j);
			uci_reorder_section(ctx, s, j);
			j++;
			break;
		}

		snprintf(ifname, IFNAMSIZ, "%s%d%s%d",
				ac->netdev,
				devnum,
				(ac->brcm_setup ? "." : "_"),
				i);
	}

	return 0;
}

int wifi_reorder_interfaces(struct agent_config *ac)
{

	struct uci_context *ctx;
	struct uci_package *pkg;
	struct uci_element *e;

	ctx = uci_alloc_context();
	if (!ctx)
		return -1;

	if (uci_load(ctx, UCI_WIRELESS, &pkg)) {
		uci_free_context(ctx);
		return -1;
	}

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);

		if (strncmp(s->type, UCI_WL_DEVICE, strlen(UCI_WL_DEVICE)))
			continue;

		wifi_reorder_interfaces_by_device(ac, ctx, pkg, s->e.name);
	}

	uci_commit(ctx, &pkg, false);
	uci_free_context(ctx);
	return 0;
}

int uci_set_bridge(char *config, char *bridge, char *proto, char *ipaddress)
{
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_element *e;
	struct uci_section *section = NULL;

	/** if bridge starts with br prefix, step past */
	if (!strncmp(bridge, "br-", 3))
		bridge += 3;

	pkg = uci_load_pkg(&ctx, "network");
	if (!pkg)
		return -1;

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);

		if (strncmp(s->e.name, bridge, 16))
			continue;

		section = s;
		break;
	}

	if (!section) {
		struct uci_ptr ptr = {0};

		ptr.p = pkg;
		ptr.section = bridge;
		ptr.value = "interface";
		ptr.option = NULL;
		uci_set(ctx, &ptr);
		section = ptr.s;
	}

	set_value(ctx, pkg, section, "type", "bridge", UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "is_lan", "1", UCI_TYPE_STRING);
	if (strlen(proto))
		set_value(ctx, pkg, section, "proto", proto, UCI_TYPE_STRING);
	if (!strcmp(proto, "static")) {
		set_value(ctx, pkg, section, "ipaddr", ipaddress,
				UCI_TYPE_STRING);
		set_value(ctx, pkg, section, "netmask", "255.255.255.0",
				UCI_TYPE_STRING);
	}

	uci_commit(ctx, &pkg, false);
	uci_unload(ctx, pkg);
	uci_free_context(ctx);
	return false;
}

int uci_add_dhcp(char *iface)
{
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_element *e;
	struct uci_section *section = NULL;
	struct uci_ptr ptr = {0};

	/** if bridge starts with br prefix, step past */
	if (!strncmp(iface, "br-", 3))
		iface += 3;

	pkg = uci_load_pkg(&ctx, "dhcp");
	if (!pkg)
		return -1;

	uci_foreach_element(&pkg->sections, e) {
		struct uci_section *s = uci_to_section(e);

		if (strncmp(s->e.name, iface, 16))
			continue;

		trace("Existing section found for ifname %s\n", iface);
		goto out;
	}

	trace("Adding DHCP section for ifname %s\n", iface);

	ptr.p = pkg;
	ptr.section = iface;
	ptr.value = "dhcp";
	ptr.option = NULL;
	uci_set(ctx, &ptr);
	section = ptr.s;

	set_value(ctx, pkg, section, "interface", iface, UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "start", "100", UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "limit", "150", UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "leasetime", "1h", UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "dhcpv6", "server", UCI_TYPE_STRING);
	set_value(ctx, pkg, section, "ra", "server", UCI_TYPE_STRING);

	uci_commit(ctx, &pkg, false);
out:
	uci_unload(ctx, pkg);
	uci_free_context(ctx);
	return false;
}

int uci_add_fw(struct agent_config *cfg, char *iface)
{
	struct uci_context *ctx = NULL;
	struct uci_package *pkg;
	struct uci_element *e;
	struct uci_section *section = NULL;
	int rv;

	/** if bridge starts with br prefix, step past */
	if (!strncmp(iface, "br-", 3))
		iface += 3;

	pkg = uci_load_pkg(&ctx, "firewall");
	if (!pkg)
		return -1;

	section = config_get_section(ctx, pkg, "zone", "name", iface);
	if (!section) {
		trace("No fw section found for %s\n", iface);
		rv = uci_add_section(ctx, pkg, "zone", &section);
		if (rv)
			goto out_pkg;

		set_value(ctx, pkg, section, "name", iface, UCI_TYPE_STRING);
		set_value(ctx, pkg, section, "network", iface, UCI_TYPE_LIST);
		set_value(ctx, pkg, section, "input", "ACCEPT", UCI_TYPE_STRING);
		set_value(ctx, pkg, section, "output", "ACCEPT", UCI_TYPE_STRING);
		set_value(ctx, pkg, section, "forward", "ACCEPT", UCI_TYPE_STRING);
		rv = uci_save(ctx, pkg);
		if (rv)
			goto out_pkg;
		uci_commit(ctx, &pkg, false);
	}

	section = config_get_section(ctx, pkg, "forwarding", "src", iface);
	if (!section) {
		//section = config_add_section(ctx, pkg, "firewall", "forwarding", "src", iface);
		//if (!section)
		//	goto out;
		rv = uci_add_section(ctx, pkg, "forwarding", &section);
		if (rv)
			goto out_pkg;

		set_value(ctx, pkg, section, "src", iface, UCI_TYPE_STRING);
		set_value(ctx, pkg, section, "dest", cfg->al_bridge, UCI_TYPE_STRING);
		uci_commit(ctx, &pkg, false);
	}

out_pkg:
	uci_unload(ctx, pkg);
	uci_free_context(ctx);
	return false;
}