X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=ui%2Fncurses%2Fnc-config.c;h=7a709ab1a3e3cf69914e65a717775fdb2f6354cc;hp=b7985aa60e40e13327bc5eb62ccc7e7770f834b5;hb=b793eb6e80e002208ef0c5d149f786c44e3c86a0;hpb=2a6f3ebc8263e94441c2c865a6b28dae40e35990

diff --git a/ui/ncurses/nc-config.c b/ui/ncurses/nc-config.c
index b7985aa..7a709ab 100644
--- a/ui/ncurses/nc-config.c
+++ b/ui/ncurses/nc-config.c
@@ -15,43 +15,88 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#define _GNU_SOURCE
-
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
 
+#include <errno.h>
+#include <stdlib.h>
 #include <string.h>
 
+#include <pb-config/pb-config.h>
 #include <talloc/talloc.h>
 #include <types/types.h>
 #include <log/log.h>
+#include <i18n/i18n.h>
 
-#include "config.h"
 #include "nc-cui.h"
 #include "nc-config.h"
 #include "nc-widgets.h"
 
-#define N_FIELDS	9
+#define N_FIELDS	26
+
+extern struct help_text config_help_text;
+
+enum autoboot_type {
+	AUTOBOOT_ANY,
+	AUTOBOOT_ONE,
+	AUTOBOOT_DISABLED,
+};
+
+enum net_conf_type {
+	NET_CONF_TYPE_DHCP_ALL,
+	NET_CONF_TYPE_DHCP_ONE,
+	NET_CONF_TYPE_STATIC,
+};
 
 struct config_screen {
 	struct nc_scr		scr;
 	struct cui		*cui;
 	struct nc_widgetset	*widgetset;
+	WINDOW			*pad;
+
 	bool			exit;
+	bool			show_help;
 	void			(*on_exit)(struct cui *);
 
+	int			scroll_y;
+
 	int			label_x;
 	int			field_x;
+	int			network_config_y;
+
+	enum net_conf_type	net_conf_type;
+	enum autoboot_type	autoboot_type;
 
 	struct {
-		struct nc_widget_checkbox	*autoboot_f;
+		struct nc_widget_select		*autoboot_f;
 		struct nc_widget_label		*autoboot_l;
+		struct nc_widget_select		*boot_device_f;
 		struct nc_widget_textbox	*timeout_f;
 		struct nc_widget_label		*timeout_l;
+		struct nc_widget_label		*timeout_help_l;
 
 		struct nc_widget_label		*network_l;
+		struct nc_widget_select		*network_f;
+
 		struct nc_widget_label		*iface_l;
 		struct nc_widget_select		*iface_f;
-
+		struct nc_widget_label		*ip_addr_l;
+		struct nc_widget_textbox	*ip_addr_f;
+		struct nc_widget_label		*ip_mask_l;
+		struct nc_widget_textbox	*ip_mask_f;
+		struct nc_widget_label		*ip_addr_mask_help_l;
+		struct nc_widget_label		*gateway_l;
+		struct nc_widget_textbox	*gateway_f;
+		struct nc_widget_label		*gateway_help_l;
+		struct nc_widget_label		*dns_l;
+		struct nc_widget_textbox	*dns_f;
+		struct nc_widget_label		*dns_dhcp_help_l;
+		struct nc_widget_label		*dns_help_l;
+
+		struct nc_widget_label		*safe_mode;
 		struct nc_widget_button		*ok_b;
+		struct nc_widget_button		*help_b;
 		struct nc_widget_button		*cancel_b;
 	} widgets;
 };
@@ -67,16 +112,46 @@ static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
 	return config_screen;
 }
 
+static void pad_refresh(struct config_screen *screen)
+{
+	int y, x, rows, cols;
+
+	getmaxyx(screen->scr.sub_ncw, rows, cols);
+	getbegyx(screen->scr.sub_ncw, y, x);
+
+	prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
+}
+
 static void config_screen_process_key(struct nc_scr *scr, int key)
 {
 	struct config_screen *screen = config_screen_from_scr(scr);
 	bool handled;
 
 	handled = widgetset_process_key(screen->widgetset, key);
-	if (screen->exit)
+
+	if (!handled) {
+		switch (key) {
+		case 'x':
+		case 27: /* esc */
+			screen->exit = true;
+			break;
+		case 'h':
+			screen->show_help = true;
+			break;
+		}
+	}
+
+	if (screen->exit) {
 		screen->on_exit(screen->cui);
-	else if (handled)
-		wrefresh(screen->scr.main_ncw);
+
+	} else if (screen->show_help) {
+		screen->show_help = false;
+		cui_show_help(screen->cui, _("System Configuration"),
+				&config_help_text);
+
+	} else if (handled) {
+		pad_refresh(screen);
+	}
 }
 
 static void config_screen_resize(struct nc_scr *scr)
@@ -90,7 +165,9 @@ static int config_screen_post(struct nc_scr *scr)
 	struct config_screen *screen = config_screen_from_scr(scr);
 	widgetset_post(screen->widgetset);
 	nc_scr_frame_draw(scr);
-	wrefresh(scr->main_ncw);
+	redrawwin(scr->main_ncw);
+	wrefresh(screen->scr.main_ncw);
+	pad_refresh(screen);
 	return 0;
 }
 
@@ -106,11 +183,158 @@ struct nc_scr *config_screen_scr(struct config_screen *screen)
 	return &screen->scr;
 }
 
+static int screen_process_form(struct config_screen *screen)
+{
+	const struct system_info *sysinfo = screen->cui->sysinfo;
+	enum net_conf_type net_conf_type;
+	struct interface_config *iface;
+	struct config *config;
+	char *str, *end;
+	int rc, idx;
+
+	config = config_copy(screen, screen->cui->config);
+
+	screen->autoboot_type =
+		widget_select_get_value(screen->widgets.autoboot_f);
+
+	config->autoboot_enabled = screen->autoboot_type != AUTOBOOT_DISABLED;
+
+	if (screen->autoboot_type == AUTOBOOT_ONE) {
+		char mac[20], *uuid = NULL;
+
+		/* if idx is -1 here, we have an unknown UUID selected.
+		 * Otherwise, it's a blockdev index (idx <= n_blockdevs) or an
+		 * interface index.
+		 */
+		idx = widget_select_get_value(screen->widgets.boot_device_f);
+		if (idx >= (int)sysinfo->n_blockdevs) {
+			struct interface_info *info = sysinfo->
+				interfaces[idx - sysinfo->n_blockdevs];
+			mac_str(info->hwaddr, info->hwaddr_size,
+					mac, sizeof(mac));
+			uuid = mac;
+		} else if (idx != -1) {
+			uuid = sysinfo->blockdevs[idx]->uuid;
+		}
+
+		if (uuid) {
+			talloc_free(config->boot_device);
+			config->boot_device = talloc_strdup(config, uuid);
+		}
+	}
+
+	str = widget_textbox_get_value(screen->widgets.timeout_f);
+	if (str) {
+		unsigned long x;
+		errno = 0;
+		x = strtoul(str, &end, 10);
+		if (!errno && end != str)
+			config->autoboot_timeout_sec = x;
+	}
+
+	net_conf_type = widget_select_get_value(screen->widgets.network_f);
+
+	/* if we don't have any network interfaces, prevent per-interface
+	 * configuration */
+	if (sysinfo->n_interfaces == 0)
+		net_conf_type = NET_CONF_TYPE_DHCP_ALL;
+
+	if (net_conf_type == NET_CONF_TYPE_DHCP_ALL) {
+		config->network.n_interfaces = 0;
+
+	} else {
+		iface = talloc_zero(config, struct interface_config);
+		config->network.n_interfaces = 1;
+		config->network.interfaces = talloc_array(config,
+				struct interface_config *, 1);
+		config->network.interfaces[0] = iface;
+
+		/* copy hwaddr (from the sysinfo interface data) to
+		 * the configuration */
+		idx = widget_select_get_value(screen->widgets.iface_f);
+		memcpy(iface->hwaddr, sysinfo->interfaces[idx]->hwaddr,
+				sizeof(iface->hwaddr));
+	}
+
+	if (net_conf_type == NET_CONF_TYPE_DHCP_ONE) {
+		iface->method = CONFIG_METHOD_DHCP;
+	}
+
+	if (net_conf_type == NET_CONF_TYPE_STATIC) {
+		char *ip, *mask, *gateway;
+
+		ip = widget_textbox_get_value(screen->widgets.ip_addr_f);
+		mask = widget_textbox_get_value(screen->widgets.ip_mask_f);
+		gateway = widget_textbox_get_value(screen->widgets.gateway_f);
+
+		if (!ip || !*ip || !mask || !*mask) {
+			screen->scr.frame.status =
+				_("No IP / mask values are set");
+			nc_scr_frame_draw(&screen->scr);
+			talloc_free(config);
+			return -1;
+		}
+
+		iface->method = CONFIG_METHOD_STATIC;
+		iface->static_config.address = talloc_asprintf(iface, "%s/%s",
+				ip, mask);
+		iface->static_config.gateway = talloc_strdup(iface, gateway);
+	}
+
+	str = widget_textbox_get_value(screen->widgets.dns_f);
+	talloc_free(config->network.dns_servers);
+	config->network.dns_servers = NULL;
+	config->network.n_dns_servers = 0;
+
+	if (str && strlen(str)) {
+		char *dns, *tmp;
+		int i;
+
+		for (;;) {
+			dns = strtok_r(str, " \t", &tmp);
+
+			if (!dns)
+				break;
+
+			i = config->network.n_dns_servers++;
+			config->network.dns_servers = talloc_realloc(config,
+					config->network.dns_servers,
+					const char *,
+					config->network.n_dns_servers);
+			config->network.dns_servers[i] =
+				talloc_strdup(config, dns);
+
+			str = NULL;
+		}
+	}
+
+	config->safe_mode = false;
+	rc = cui_send_config(screen->cui, config);
+	talloc_free(config);
+
+	if (rc)
+		pb_log("cui_send_config failed!\n");
+	else
+		pb_debug("config sent!\n");
+
+	return 0;
+}
+
 static void ok_click(void *arg)
 {
 	struct config_screen *screen = arg;
-	/* todo: save config */
-	screen->on_exit(screen->cui);
+	if (screen_process_form(screen))
+		/* errors are written to the status line, so we'll need
+		 * to refresh */
+		wrefresh(screen->scr.main_ncw);
+	else
+		screen->exit = true;
+}
+
+static void help_click(void *arg)
+{
+	struct config_screen *screen = arg;
+	screen->show_help = true;
 }
 
 static void cancel_click(void *arg)
@@ -131,49 +355,488 @@ static int layout_pair(struct config_screen *screen, int y,
 
 static void config_screen_layout_widgets(struct config_screen *screen)
 {
-	int y;
+	struct nc_widget *wl, *wf, *wh;
+	int y, x, help_x;
+	bool show;
 
 	y = 1;
+	help_x = screen->field_x + 2 +
+		widget_width(widget_textbox_base(screen->widgets.dns_f));
 
 	y += layout_pair(screen, y, screen->widgets.autoboot_l,
-			widget_checkbox_base(screen->widgets.autoboot_f));
+			widget_select_base(screen->widgets.autoboot_f));
+
+	wf = widget_select_base(screen->widgets.boot_device_f);
+	if (screen->autoboot_type == AUTOBOOT_ONE) {
+		widget_set_visible(wf, true);
+		widget_move(wf, y, screen->field_x + 3);
+		y += widget_height(wf);
+	} else {
+		widget_set_visible(wf, false);
+	}
+
+	y += 1;
+
+	wf = widget_textbox_base(screen->widgets.timeout_f);
+	wl = widget_label_base(screen->widgets.timeout_l);
+	wh = widget_label_base(screen->widgets.timeout_help_l);
+	if (screen->autoboot_type != AUTOBOOT_DISABLED) {
+		widget_set_visible(wl, true);
+		widget_set_visible(wf, true);
+		widget_set_visible(wh, true);
+		widget_move(wl, y, screen->label_x);
+		widget_move(wf, y, screen->field_x);
+		widget_move(wh, y, screen->field_x + widget_width(wf) + 1);
+		y += 2;
+	} else {
+		widget_set_visible(wl, false);
+		widget_set_visible(wf, false);
+		widget_set_visible(wh, false);
+	}
+
+	y += layout_pair(screen, y, screen->widgets.network_l,
+			widget_select_base(screen->widgets.network_f));
+
+	y += 1;
+
+	/* conditionally show iface select */
+	wl = widget_label_base(screen->widgets.iface_l);
+	wf = widget_select_base(screen->widgets.iface_f);
+
+	show = screen->net_conf_type == NET_CONF_TYPE_DHCP_ONE ||
+		screen->net_conf_type == NET_CONF_TYPE_STATIC;
+
+	widget_set_visible(wl, show);
+	widget_set_visible(wf, show);
+
+	if (show)
+		y += layout_pair(screen, y, screen->widgets.iface_l, wf) + 1;
+
+	/* conditionally show static IP params */
+	show = screen->net_conf_type == NET_CONF_TYPE_STATIC;
+
+	wl = widget_label_base(screen->widgets.ip_addr_l);
+	wf = widget_textbox_base(screen->widgets.ip_addr_f);
+	widget_set_visible(wl, show);
+	widget_set_visible(wf, show);
+	x = screen->field_x + widget_width(wf) + 1;
+
+	if (show)
+		layout_pair(screen, y, screen->widgets.ip_addr_l, wf);
+
+	wl = widget_label_base(screen->widgets.ip_mask_l);
+	wf = widget_textbox_base(screen->widgets.ip_mask_f);
+	widget_set_visible(wl, show);
+	widget_set_visible(wf, show);
+
+	if (show) {
+		widget_move(wl, y, x);
+		widget_move(wf, y, x + 2);
+	}
+
+	/* help for IP/mask */
+	wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
+	widget_set_visible(wh, show);
+	if (show) {
+		widget_move(wh, y, help_x);
+		y++;
+	}
+
+	wl = widget_label_base(screen->widgets.gateway_l);
+	wf = widget_textbox_base(screen->widgets.gateway_f);
+	wh = widget_label_base(screen->widgets.gateway_help_l);
+	widget_set_visible(wl, show);
+	widget_set_visible(wf, show);
+	widget_set_visible(wh, show);
+
+	if (show) {
+		layout_pair(screen, y, screen->widgets.gateway_l, wf);
+		widget_move(wh, y, help_x);
+		y++;
+	}
+
+	wh = widget_label_base(screen->widgets.dns_help_l);
+	layout_pair(screen, y, screen->widgets.dns_l,
+			widget_textbox_base(screen->widgets.dns_f));
+	widget_move(wh, y, help_x);
+	y++;
 
-	y += layout_pair(screen, y, screen->widgets.timeout_l,
-			widget_textbox_base(screen->widgets.timeout_f));
+	/* we show the DNS/DHCP help if we're configuring DHCP */
+	show = screen->net_conf_type != NET_CONF_TYPE_STATIC;
+	wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
+	widget_set_visible(wl, show);
+	if (show) {
+		widget_move(wl, y, screen->field_x);
+		y += 1;
+	}
 
-	y++;
+	y += 1;
+
+	show = screen->cui->config->safe_mode;
+	if (show) {
+		widget_move(widget_label_base(screen->widgets.safe_mode),
+			y, screen->field_x);
+		y += 1;
+	}
 
 	widget_move(widget_button_base(screen->widgets.ok_b),
 			y, screen->field_x);
-	widget_move(widget_button_base(screen->widgets.cancel_b),
+	widget_move(widget_button_base(screen->widgets.help_b),
 			y, screen->field_x + 10);
+	widget_move(widget_button_base(screen->widgets.cancel_b),
+			y, screen->field_x + 20);
 }
 
+static void config_screen_network_change(void *arg, int value)
+{
+	struct config_screen *screen = arg;
+	screen->net_conf_type = value;
+	widgetset_unpost(screen->widgetset);
+	config_screen_layout_widgets(screen);
+	widgetset_post(screen->widgetset);
+}
+
+static void config_screen_autoboot_change(void *arg, int value)
+{
+	struct config_screen *screen = arg;
+	screen->autoboot_type = value;
+	widgetset_unpost(screen->widgetset);
+	config_screen_layout_widgets(screen);
+	widgetset_post(screen->widgetset);
+}
+
+static struct interface_config *first_active_interface(
+		const struct config *config)
+{
+	unsigned int i;
+
+	for (i = 0; i < config->network.n_interfaces; i++) {
+		if (config->network.interfaces[i]->ignore)
+			continue;
+		return config->network.interfaces[i];
+	}
+	return NULL;
+}
+
+static enum net_conf_type find_net_conf_type(const struct config *config)
+{
+	struct interface_config *ifcfg;
+
+	ifcfg = first_active_interface(config);
+
+	if (!ifcfg)
+		return NET_CONF_TYPE_DHCP_ALL;
+
+	else if (ifcfg->method == CONFIG_METHOD_DHCP)
+		return NET_CONF_TYPE_DHCP_ONE;
+
+	else if (ifcfg->method == CONFIG_METHOD_STATIC)
+		return NET_CONF_TYPE_STATIC;
+
+	assert(0);
+	return NET_CONF_TYPE_DHCP_ALL;
+}
+
+static void config_screen_setup_empty(struct config_screen *screen)
+{
+	widget_new_label(screen->widgetset, 2, screen->field_x,
+			_("Waiting for configuration data..."));
+	screen->widgets.cancel_b = widget_new_button(screen->widgetset,
+			4, screen->field_x, 6, _("Cancel"),
+			cancel_click, screen);
+}
+
+
 static void config_screen_setup_widgets(struct config_screen *screen,
 		const struct config *config,
 		const struct system_info *sysinfo)
 {
 	struct nc_widgetset *set = screen->widgetset;
-	char *str;
-
-	(void)sysinfo;
+	struct interface_config *ifcfg;
+	char *str, *ip, *mask, *gw;
+	enum net_conf_type type;
+	unsigned int i;
+	bool found;
 
 	build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
 			== N_FIELDS);
 
-	screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
-	screen->widgets.autoboot_f = widget_new_checkbox(set, 0, 0,
-					config->autoboot_enabled);
+	type = screen->net_conf_type;
+	ifcfg = first_active_interface(config);
+
+	screen->widgets.autoboot_l = widget_new_label(set, 0, 0,
+					_("Autoboot:"));
+	screen->widgets.autoboot_f = widget_new_select(set, 0, 0, 55);
+
+	widget_select_on_change(screen->widgets.autoboot_f,
+			config_screen_autoboot_change, screen);
+
+	screen->widgets.boot_device_f = widget_new_select(set, 0, 0, 55);
+
+	widget_select_add_option(screen->widgets.autoboot_f,
+					AUTOBOOT_DISABLED,
+					_("Don't autoboot"),
+					screen->autoboot_type ==
+						AUTOBOOT_DISABLED);
+	widget_select_add_option(screen->widgets.autoboot_f,
+					AUTOBOOT_ANY,
+					_("Autoboot from any "
+						"disk/network device"),
+					screen->autoboot_type ==
+						AUTOBOOT_ANY);
+	widget_select_add_option(screen->widgets.autoboot_f,
+					AUTOBOOT_ONE,
+					_("Only autoboot from a specific "
+						"disk/network device"),
+					screen->autoboot_type ==
+						AUTOBOOT_ONE);
+
+	found = false;
+
+	for (i = 0; i < sysinfo->n_blockdevs; i++) {
+		struct blockdev_info *bd = sysinfo->blockdevs[i];
+		bool selected;
+		char *label;
+
+		selected = config->boot_device &&
+				!strcmp(config->boot_device, bd->uuid);
+		if (selected)
+			found = true;
+
+		label = talloc_asprintf(screen, _("disk: %s [uuid: %s]"),
+				bd->name, bd->uuid);
+
+		widget_select_add_option(screen->widgets.boot_device_f, i,
+					label, selected);
+	}
+
+	for (i = 0; i < sysinfo->n_interfaces; i++) {
+		struct interface_info *info = sysinfo->interfaces[i];
+		char *label, mac[20];
+		bool selected;
+
+		mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
+		selected = config->boot_device &&
+				!strcmp(config->boot_device, mac);
+		if (selected)
+			found = true;
+
+		label = talloc_asprintf(screen, _("net:  %s [mac: %s]"),
+				info->name, mac);
+
+		widget_select_add_option(screen->widgets.boot_device_f,
+						i + sysinfo->n_blockdevs,
+						label, selected);
+	}
+
+	if (screen->autoboot_type == AUTOBOOT_ONE && !found) {
+		char *label;
+
+		label = talloc_asprintf(screen, _("Unknown UUID: %s"),
+				config->boot_device);
+
+		widget_select_add_option(screen->widgets.boot_device_f, -1,
+						label, true);
+	}
 
 	str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
-	screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
+	screen->widgets.timeout_l = widget_new_label(set, 0, 0, _("Timeout:"));
 	screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
-
-	screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
+	screen->widgets.timeout_help_l = widget_new_label(set, 0, 0,
+					_("seconds"));
+
+	widget_textbox_set_fixed_size(screen->widgets.timeout_f);
+	widget_textbox_set_validator_integer(screen->widgets.timeout_f, 0, 999);
+
+	screen->widgets.network_l = widget_new_label(set, 0, 0, _("Network:"));
+	screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
+
+	widget_select_add_option(screen->widgets.network_f,
+					NET_CONF_TYPE_DHCP_ALL,
+					_("DHCP on all active interfaces"),
+					type == NET_CONF_TYPE_DHCP_ALL);
+	widget_select_add_option(screen->widgets.network_f,
+					NET_CONF_TYPE_DHCP_ONE,
+					_("DHCP on a specific interface"),
+					type == NET_CONF_TYPE_DHCP_ONE);
+	widget_select_add_option(screen->widgets.network_f,
+					NET_CONF_TYPE_STATIC,
+					_("Static IP configuration"),
+					type == NET_CONF_TYPE_STATIC);
+
+	widget_select_on_change(screen->widgets.network_f,
+			config_screen_network_change, screen);
+
+	screen->widgets.iface_l = widget_new_label(set, 0, 0, _("Device:"));
+	screen->widgets.iface_f = widget_new_select(set, 0, 0, 50);
+
+	for (i = 0; i < sysinfo->n_interfaces; i++) {
+		struct interface_info *info = sysinfo->interfaces[i];
+		char str[50], mac[20];
+		bool is_default;
+
+		is_default = ifcfg && !memcmp(ifcfg->hwaddr, info->hwaddr,
+					sizeof(ifcfg->hwaddr));
+
+		mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
+		snprintf(str, sizeof(str), "%s [%s, %s]", info->name, mac,
+				info->link ? _("link up") : _("link down"));
+
+		widget_select_add_option(screen->widgets.iface_f,
+						i, str, is_default);
+	}
+
+	gw = ip = mask = NULL;
+	if (ifcfg && ifcfg->method == CONFIG_METHOD_STATIC) {
+		char *sep;
+
+		str = talloc_strdup(screen, ifcfg->static_config.address);
+		sep = strchr(str, '/');
+		ip = str;
+
+		if (sep) {
+			*sep = '\0';
+			mask = sep + 1;
+		}
+		gw = ifcfg->static_config.gateway;
+	}
+
+	screen->widgets.ip_addr_l = widget_new_label(set, 0, 0, _("IP/mask:"));
+	screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
+	screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
+	screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 3, mask);
+	screen->widgets.ip_addr_mask_help_l =
+		widget_new_label(set, 0, 0, _("(eg. 192.168.0.10 / 24)"));
+
+	widget_textbox_set_fixed_size(screen->widgets.ip_addr_f);
+	widget_textbox_set_fixed_size(screen->widgets.ip_mask_f);
+	widget_textbox_set_validator_ipv4(screen->widgets.ip_addr_f);
+	widget_textbox_set_validator_integer(screen->widgets.ip_mask_f, 1, 31);
+
+	screen->widgets.gateway_l = widget_new_label(set, 0, 0, _("Gateway:"));
+	screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
+	screen->widgets.gateway_help_l =
+		widget_new_label(set, 0, 0, _("(eg. 192.168.0.1)"));
+
+	widget_textbox_set_fixed_size(screen->widgets.gateway_f);
+	widget_textbox_set_validator_ipv4(screen->widgets.gateway_f);
+
+	str = talloc_strdup(screen, "");
+	for (i = 0; i < config->network.n_dns_servers; i++) {
+		str = talloc_asprintf_append(str, "%s%s",
+				(i == 0) ? "" : " ",
+				config->network.dns_servers[i]);
+	}
+
+	screen->widgets.dns_l = widget_new_label(set, 0, 0,
+					_("DNS Server(s):"));
+	screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
+	screen->widgets.dns_help_l =
+		widget_new_label(set, 0, 0, _("(eg. 192.168.0.2)"));
+
+	widget_textbox_set_validator_ipv4_multi(screen->widgets.dns_f);
+
+	screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
+			_("(if not provided by DHCP server)"));
+
+	if (config->safe_mode)
+		screen->widgets.safe_mode = widget_new_label(set, 0, 0,
+			 _("Selecting 'OK' will exit safe mode"));
+
+	screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, _("OK"),
 			ok_click, screen);
-	screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
+	screen->widgets.help_b = widget_new_button(set, 0, 0, 6, _("Help"),
+			help_click, screen);
+	screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, _("Cancel"),
 			cancel_click, screen);
+}
+
+static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
+{
+	struct config_screen *screen = arg;
+	int w_y, s_max;
+
+	w_y = widget_y(widget) + widget_focus_y(widget);
+	s_max = getmaxy(screen->scr.sub_ncw) - 1;
 
+	if (w_y < screen->scroll_y)
+		screen->scroll_y = w_y;
+
+	else if (w_y + screen->scroll_y + 1 > s_max)
+		screen->scroll_y = 1 + w_y - s_max;
+
+	else
+		return;
+
+	pad_refresh(screen);
+}
+
+static void config_screen_draw(struct config_screen *screen,
+		const struct config *config,
+		const struct system_info *sysinfo)
+{
+	bool repost = false;
+	int height;
+
+	/* The size of the pad we'll need depends on the number of interfaces.
+	 *
+	 * We use N_FIELDS (which is quite conservative, as some fields share
+	 * a line) as a base, then add 3 (as the network select field is
+	 * takes 3 lines), and n_interfaces (as the network interface field
+	 * has n_interfaces lines).
+	 */
+	height = N_FIELDS + 3;
+	if (sysinfo)
+		height += sysinfo->n_interfaces;
+	if (!screen->pad || getmaxy(screen->pad) < height) {
+		if (screen->pad)
+			delwin(screen->pad);
+		screen->pad = newpad(height, COLS);
+	}
+
+	if (screen->widgetset) {
+		widgetset_unpost(screen->widgetset);
+		talloc_free(screen->widgetset);
+		repost = true;
+	}
+
+	screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
+			screen->pad);
+	widgetset_set_widget_focus(screen->widgetset,
+			config_screen_widget_focus, screen);
+
+	if (!config || !sysinfo) {
+		config_screen_setup_empty(screen);
+	} else {
+		screen->net_conf_type = find_net_conf_type(config);
+		if (!config->autoboot_enabled)
+			screen->autoboot_type = AUTOBOOT_DISABLED;
+		else
+			screen->autoboot_type = config->boot_device ?
+					AUTOBOOT_ONE : AUTOBOOT_ANY;
+
+		config_screen_setup_widgets(screen, config, sysinfo);
+		config_screen_layout_widgets(screen);
+	}
+
+	if (repost)
+		widgetset_post(screen->widgetset);
+}
+
+void config_screen_update(struct config_screen *screen,
+		const struct config *config,
+		const struct system_info *sysinfo)
+{
+	config_screen_draw(screen, config, sysinfo);
+	pad_refresh(screen);
+}
+
+static int config_screen_destroy(void *arg)
+{
+	struct config_screen *screen = arg;
+	if (screen->pad)
+		delwin(screen->pad);
+	return 0;
 }
 
 struct config_screen *config_screen_init(struct cui *cui,
@@ -184,6 +847,7 @@ struct config_screen *config_screen_init(struct cui *cui,
 	struct config_screen *screen;
 
 	screen = talloc_zero(cui, struct config_screen);
+	talloc_set_destructor(screen, config_screen_destroy);
 	nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 			cui, config_screen_process_key,
 			config_screen_post, config_screen_unpost,
@@ -192,22 +856,18 @@ struct config_screen *config_screen_init(struct cui *cui,
 	screen->cui = cui;
 	screen->on_exit = on_exit;
 	screen->label_x = 2;
-	screen->field_x = 16;
+	screen->field_x = 17;
 
 	screen->scr.frame.ltitle = talloc_strdup(screen,
-			"Petitboot System Configuration");
+			_("Petitboot System Configuration"));
 	screen->scr.frame.rtitle = NULL;
 	screen->scr.frame.help = talloc_strdup(screen,
-			"tab=next, shift+tab=previous");
+			_("tab=next, shift+tab=previous, x=exit, h=help"));
 	nc_scr_frame_draw(&screen->scr);
 
-	screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
-			screen->scr.sub_ncw);
-	config_screen_setup_widgets(screen, config, sysinfo);
-	config_screen_layout_widgets(screen);
-
-	wrefresh(screen->scr.main_ncw);
 	scrollok(screen->scr.sub_ncw, true);
 
+	config_screen_draw(screen, config, sysinfo);
+
 	return screen;
 }