git.ozlabs.org Git - petitboot/blob - ui/ncurses/nc-config.c

   1 /*
   2  *  Copyright (C) 2013 IBM Corporation
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; version 2 of the License.
   7  *
   8  *  This program is distributed in the hope that it will be useful,
   9  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *  GNU General Public License for more details.
  12  *
  13  *  You should have received a copy of the GNU General Public License
  14  *  along with this program; if not, write to the Free Software
  15  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #if defined(HAVE_CONFIG_H)
  19 #include "config.h"
  20 #endif
  21
  22 #include <errno.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include <pb-config/pb-config.h>
  27 #include <talloc/talloc.h>
  28 #include <types/types.h>
  29 #include <log/log.h>
  30
  31 #include "nc-cui.h"
  32 #include "nc-config.h"
  33 #include "nc-widgets.h"
  34
  35 #define N_FIELDS        25
  36
  37 extern const char *config_help_text;
  38
  39 enum autoboot_type {
  40         AUTOBOOT_ANY,
  41         AUTOBOOT_ONE,
  42         AUTOBOOT_DISABLED,
  43 };
  44
  45 enum net_conf_type {
  46         NET_CONF_TYPE_DHCP_ALL,
  47         NET_CONF_TYPE_DHCP_ONE,
  48         NET_CONF_TYPE_STATIC,
  49 };
  50
  51 struct config_screen {
  52         struct nc_scr           scr;
  53         struct cui              *cui;
  54         struct nc_widgetset     *widgetset;
  55         WINDOW                  *pad;
  56
  57         bool                    exit;
  58         bool                    show_help;
  59         void                    (*on_exit)(struct cui *);
  60
  61         int                     scroll_y;
  62
  63         int                     label_x;
  64         int                     field_x;
  65         int                     network_config_y;
  66
  67         enum net_conf_type      net_conf_type;
  68         enum autoboot_type      autoboot_type;
  69
  70         struct {
  71                 struct nc_widget_select         *autoboot_f;
  72                 struct nc_widget_label          *autoboot_l;
  73                 struct nc_widget_select         *boot_device_f;
  74                 struct nc_widget_textbox        *timeout_f;
  75                 struct nc_widget_label          *timeout_l;
  76                 struct nc_widget_label          *timeout_help_l;
  77
  78                 struct nc_widget_label          *network_l;
  79                 struct nc_widget_select         *network_f;
  80
  81                 struct nc_widget_label          *iface_l;
  82                 struct nc_widget_select         *iface_f;
  83                 struct nc_widget_label          *ip_addr_l;
  84                 struct nc_widget_textbox        *ip_addr_f;
  85                 struct nc_widget_label          *ip_mask_l;
  86                 struct nc_widget_textbox        *ip_mask_f;
  87                 struct nc_widget_label          *ip_addr_mask_help_l;
  88                 struct nc_widget_label          *gateway_l;
  89                 struct nc_widget_textbox        *gateway_f;
  90                 struct nc_widget_label          *gateway_help_l;
  91                 struct nc_widget_label          *dns_l;
  92                 struct nc_widget_textbox        *dns_f;
  93                 struct nc_widget_label          *dns_dhcp_help_l;
  94                 struct nc_widget_label          *dns_help_l;
  95
  96                 struct nc_widget_button         *ok_b;
  97                 struct nc_widget_button         *help_b;
  98                 struct nc_widget_button         *cancel_b;
  99         } widgets;
 100 };
 101
 102 static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
 103 {
 104         struct config_screen *config_screen;
 105
 106         assert(scr->sig == pb_config_screen_sig);
 107         config_screen = (struct config_screen *)
 108                 ((char *)scr - (size_t)&((struct config_screen *)0)->scr);
 109         assert(config_screen->scr.sig == pb_config_screen_sig);
 110         return config_screen;
 111 }
 112
 113 static void pad_refresh(struct config_screen *screen)
 114 {
 115         int y, x, rows, cols;
 116
 117         getmaxyx(screen->scr.sub_ncw, rows, cols);
 118         getbegyx(screen->scr.sub_ncw, y, x);
 119
 120         prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
 121 }
 122
 123 static void config_screen_process_key(struct nc_scr *scr, int key)
 124 {
 125         struct config_screen *screen = config_screen_from_scr(scr);
 126         bool handled;
 127
 128         handled = widgetset_process_key(screen->widgetset, key);
 129
 130         if (!handled) {
 131                 switch (key) {
 132                 case 'x':
 133                 case 27: /* esc */
 134                         screen->exit = true;
 135                         break;
 136                 case 'h':
 137                         screen->show_help = true;
 138                         break;
 139                 }
 140         }
 141
 142         if (screen->exit) {
 143                 screen->on_exit(screen->cui);
 144
 145         } else if (screen->show_help) {
 146                 screen->show_help = false;
 147                 cui_show_help(screen->cui, "System Configuration",
 148                                 config_help_text);
 149
 150         } else if (handled) {
 151                 pad_refresh(screen);
 152         }
 153 }
 154
 155 static void config_screen_resize(struct nc_scr *scr)
 156 {
 157         struct config_screen *screen = config_screen_from_scr(scr);
 158         (void)screen;
 159 }
 160
 161 static int config_screen_post(struct nc_scr *scr)
 162 {
 163         struct config_screen *screen = config_screen_from_scr(scr);
 164         widgetset_post(screen->widgetset);
 165         nc_scr_frame_draw(scr);
 166         redrawwin(scr->main_ncw);
 167         wrefresh(screen->scr.main_ncw);
 168         pad_refresh(screen);
 169         return 0;
 170 }
 171
 172 static int config_screen_unpost(struct nc_scr *scr)
 173 {
 174         struct config_screen *screen = config_screen_from_scr(scr);
 175         widgetset_unpost(screen->widgetset);
 176         return 0;
 177 }
 178
 179 struct nc_scr *config_screen_scr(struct config_screen *screen)
 180 {
 181         return &screen->scr;
 182 }
 183
 184 static int screen_process_form(struct config_screen *screen)
 185 {
 186         const struct system_info *sysinfo = screen->cui->sysinfo;
 187         enum net_conf_type net_conf_type;
 188         struct interface_config *iface;
 189         struct config *config;
 190         char *str, *end;
 191         int rc, idx;
 192
 193         config = config_copy(screen, screen->cui->config);
 194
 195         screen->autoboot_type =
 196                 widget_select_get_value(screen->widgets.autoboot_f);
 197
 198         config->autoboot_enabled = screen->autoboot_type != AUTOBOOT_DISABLED;
 199
 200         if (screen->autoboot_type == AUTOBOOT_ONE) {
 201                 char mac[20], *uuid = NULL;
 202
 203                 /* if idx is -1 here, we have an unknown UUID selected.
 204                  * Otherwise, it's a blockdev index (idx <= n_blockdevs) or an
 205                  * interface index.
 206                  */
 207                 idx = widget_select_get_value(screen->widgets.boot_device_f);
 208                 if (idx >= (int)sysinfo->n_blockdevs) {
 209                         struct interface_info *info = sysinfo->
 210                                 interfaces[idx - sysinfo->n_blockdevs];
 211                         mac_str(info->hwaddr, info->hwaddr_size,
 212                                         mac, sizeof(mac));
 213                         uuid = mac;
 214                 } else if (idx != -1) {
 215                         uuid = sysinfo->blockdevs[idx]->uuid;
 216                 }
 217
 218                 if (uuid) {
 219                         talloc_free(config->boot_device);
 220                         config->boot_device = talloc_strdup(config, uuid);
 221                 }
 222         }
 223
 224         str = widget_textbox_get_value(screen->widgets.timeout_f);
 225         if (str) {
 226                 unsigned long x;
 227                 errno = 0;
 228                 x = strtoul(str, &end, 10);
 229                 if (!errno && end != str)
 230                         config->autoboot_timeout_sec = x;
 231         }
 232
 233         net_conf_type = widget_select_get_value(screen->widgets.network_f);
 234
 235         /* if we don't have any network interfaces, prevent per-interface
 236          * configuration */
 237         if (sysinfo->n_interfaces == 0)
 238                 net_conf_type = NET_CONF_TYPE_DHCP_ALL;
 239
 240         if (net_conf_type == NET_CONF_TYPE_DHCP_ALL) {
 241                 config->network.n_interfaces = 0;
 242
 243         } else {
 244                 iface = talloc_zero(config, struct interface_config);
 245                 config->network.n_interfaces = 1;
 246                 config->network.interfaces = talloc_array(config,
 247                                 struct interface_config *, 1);
 248                 config->network.interfaces[0] = iface;
 249
 250                 /* copy hwaddr (from the sysinfo interface data) to
 251                  * the configuration */
 252                 idx = widget_select_get_value(screen->widgets.iface_f);
 253                 memcpy(iface->hwaddr, sysinfo->interfaces[idx]->hwaddr,
 254                                 sizeof(iface->hwaddr));
 255         }
 256
 257         if (net_conf_type == NET_CONF_TYPE_DHCP_ONE) {
 258                 iface->method = CONFIG_METHOD_DHCP;
 259         }
 260
 261         if (net_conf_type == NET_CONF_TYPE_STATIC) {
 262                 char *ip, *mask, *gateway;
 263
 264                 ip = widget_textbox_get_value(screen->widgets.ip_addr_f);
 265                 mask = widget_textbox_get_value(screen->widgets.ip_mask_f);
 266                 gateway = widget_textbox_get_value(screen->widgets.gateway_f);
 267
 268                 if (!ip || !*ip || !mask || !*mask) {
 269                         screen->scr.frame.status =
 270                                 "No IP / mask values are set";
 271                         nc_scr_frame_draw(&screen->scr);
 272                         talloc_free(config);
 273                         return -1;
 274                 }
 275
 276                 iface->method = CONFIG_METHOD_STATIC;
 277                 iface->static_config.address = talloc_asprintf(iface, "%s/%s",
 278                                 ip, mask);
 279                 iface->static_config.gateway = talloc_strdup(iface, gateway);
 280         }
 281
 282         str = widget_textbox_get_value(screen->widgets.dns_f);
 283         talloc_free(config->network.dns_servers);
 284         config->network.dns_servers = NULL;
 285         config->network.n_dns_servers = 0;
 286
 287         if (str && strlen(str)) {
 288                 char *dns, *tmp;
 289                 int i;
 290
 291                 for (;;) {
 292                         dns = strtok_r(str, " \t", &tmp);
 293
 294                         if (!dns)
 295                                 break;
 296
 297                         i = config->network.n_dns_servers++;
 298                         config->network.dns_servers = talloc_realloc(config,
 299                                         config->network.dns_servers,
 300                                         const char *,
 301                                         config->network.n_dns_servers);
 302                         config->network.dns_servers[i] =
 303                                 talloc_strdup(config, dns);
 304
 305                         str = NULL;
 306                 }
 307         }
 308
 309         rc = cui_send_config(screen->cui, config);
 310         talloc_free(config);
 311
 312         if (rc)
 313                 pb_log("cui_send_config failed!\n");
 314         else
 315                 pb_debug("config sent!\n");
 316
 317         return 0;
 318 }
 319
 320 static void ok_click(void *arg)
 321 {
 322         struct config_screen *screen = arg;
 323         if (screen_process_form(screen))
 324                 /* errors are written to the status line, so we'll need
 325                  * to refresh */
 326                 wrefresh(screen->scr.main_ncw);
 327         else
 328                 screen->exit = true;
 329 }
 330
 331 static void help_click(void *arg)
 332 {
 333         struct config_screen *screen = arg;
 334         screen->show_help = true;
 335 }
 336
 337 static void cancel_click(void *arg)
 338 {
 339         struct config_screen *screen = arg;
 340         screen->exit = true;
 341 }
 342
 343 static int layout_pair(struct config_screen *screen, int y,
 344                 struct nc_widget_label *label,
 345                 struct nc_widget *field)
 346 {
 347         struct nc_widget *label_w = widget_label_base(label);
 348         widget_move(label_w, y, screen->label_x);
 349         widget_move(field, y, screen->field_x);
 350         return max(widget_height(label_w), widget_height(field));
 351 }
 352
 353 static void config_screen_layout_widgets(struct config_screen *screen)
 354 {
 355         struct nc_widget *wl, *wf, *wh;
 356         int y, x, help_x;
 357         bool show;
 358
 359         y = 1;
 360         help_x = screen->field_x + 2 +
 361                 widget_width(widget_textbox_base(screen->widgets.dns_f));
 362
 363         y += layout_pair(screen, y, screen->widgets.autoboot_l,
 364                         widget_select_base(screen->widgets.autoboot_f));
 365
 366         wf = widget_select_base(screen->widgets.boot_device_f);
 367         if (screen->autoboot_type == AUTOBOOT_ONE) {
 368                 widget_set_visible(wf, true);
 369                 widget_move(wf, y, screen->field_x + 3);
 370                 y += widget_height(wf);
 371         } else {
 372                 widget_set_visible(wf, false);
 373         }
 374
 375         y += 1;
 376
 377         wf = widget_textbox_base(screen->widgets.timeout_f);
 378         wl = widget_label_base(screen->widgets.timeout_l);
 379         wh = widget_label_base(screen->widgets.timeout_help_l);
 380         if (screen->autoboot_type != AUTOBOOT_DISABLED) {
 381                 widget_set_visible(wl, true);
 382                 widget_set_visible(wf, true);
 383                 widget_set_visible(wh, true);
 384                 widget_move(wl, y, screen->label_x);
 385                 widget_move(wf, y, screen->field_x);
 386                 widget_move(wh, y, screen->field_x + widget_width(wf) + 1);
 387                 y += 2;
 388         } else {
 389                 widget_set_visible(wl, false);
 390                 widget_set_visible(wf, false);
 391                 widget_set_visible(wh, false);
 392         }
 393
 394         y += layout_pair(screen, y, screen->widgets.network_l,
 395                         widget_select_base(screen->widgets.network_f));
 396
 397         y += 1;
 398
 399         /* conditionally show iface select */
 400         wl = widget_label_base(screen->widgets.iface_l);
 401         wf = widget_select_base(screen->widgets.iface_f);
 402
 403         show = screen->net_conf_type == NET_CONF_TYPE_DHCP_ONE ||
 404                 screen->net_conf_type == NET_CONF_TYPE_STATIC;
 405
 406         widget_set_visible(wl, show);
 407         widget_set_visible(wf, show);
 408
 409         if (show)
 410                 y += layout_pair(screen, y, screen->widgets.iface_l, wf) + 1;
 411
 412         /* conditionally show static IP params */
 413         show = screen->net_conf_type == NET_CONF_TYPE_STATIC;
 414
 415         wl = widget_label_base(screen->widgets.ip_addr_l);
 416         wf = widget_textbox_base(screen->widgets.ip_addr_f);
 417         widget_set_visible(wl, show);
 418         widget_set_visible(wf, show);
 419         x = screen->field_x + widget_width(wf) + 1;
 420
 421         if (show)
 422                 layout_pair(screen, y, screen->widgets.ip_addr_l, wf);
 423
 424         wl = widget_label_base(screen->widgets.ip_mask_l);
 425         wf = widget_textbox_base(screen->widgets.ip_mask_f);
 426         widget_set_visible(wl, show);
 427         widget_set_visible(wf, show);
 428
 429         if (show) {
 430                 widget_move(wl, y, x);
 431                 widget_move(wf, y, x + 2);
 432         }
 433
 434         /* help for IP/mask */
 435         wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
 436         widget_set_visible(wh, show);
 437         if (show) {
 438                 widget_move(wh, y, help_x);
 439                 y++;
 440         }
 441
 442         wl = widget_label_base(screen->widgets.gateway_l);
 443         wf = widget_textbox_base(screen->widgets.gateway_f);
 444         wh = widget_label_base(screen->widgets.gateway_help_l);
 445         widget_set_visible(wl, show);
 446         widget_set_visible(wf, show);
 447         widget_set_visible(wh, show);
 448
 449         if (show) {
 450                 layout_pair(screen, y, screen->widgets.gateway_l, wf);
 451                 widget_move(wh, y, help_x);
 452                 y++;
 453         }
 454
 455         wh = widget_label_base(screen->widgets.dns_help_l);
 456         layout_pair(screen, y, screen->widgets.dns_l,
 457                         widget_textbox_base(screen->widgets.dns_f));
 458         widget_move(wh, y, help_x);
 459         y++;
 460
 461         /* we show the DNS/DHCP help if we're configuring DHCP */
 462         show = screen->net_conf_type != NET_CONF_TYPE_STATIC;
 463         wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
 464         widget_set_visible(wl, show);
 465         if (show) {
 466                 widget_move(wl, y, screen->field_x);
 467                 y += 1;
 468         }
 469
 470         y += 1;
 471
 472         widget_move(widget_button_base(screen->widgets.ok_b),
 473                         y, screen->field_x);
 474         widget_move(widget_button_base(screen->widgets.help_b),
 475                         y, screen->field_x + 10);
 476         widget_move(widget_button_base(screen->widgets.cancel_b),
 477                         y, screen->field_x + 20);
 478 }
 479
 480 static void config_screen_network_change(void *arg, int value)
 481 {
 482         struct config_screen *screen = arg;
 483         screen->net_conf_type = value;
 484         widgetset_unpost(screen->widgetset);
 485         config_screen_layout_widgets(screen);
 486         widgetset_post(screen->widgetset);
 487 }
 488
 489 static void config_screen_autoboot_change(void *arg, int value)
 490 {
 491         struct config_screen *screen = arg;
 492         screen->autoboot_type = value;
 493         widgetset_unpost(screen->widgetset);
 494         config_screen_layout_widgets(screen);
 495         widgetset_post(screen->widgetset);
 496 }
 497
 498 static struct interface_config *first_active_interface(
 499                 const struct config *config)
 500 {
 501         unsigned int i;
 502
 503         for (i = 0; i < config->network.n_interfaces; i++) {
 504                 if (config->network.interfaces[i]->ignore)
 505                         continue;
 506                 return config->network.interfaces[i];
 507         }
 508         return NULL;
 509 }
 510
 511 static enum net_conf_type find_net_conf_type(const struct config *config)
 512 {
 513         struct interface_config *ifcfg;
 514
 515         ifcfg = first_active_interface(config);
 516
 517         if (!ifcfg)
 518                 return NET_CONF_TYPE_DHCP_ALL;
 519
 520         else if (ifcfg->method == CONFIG_METHOD_DHCP)
 521                 return NET_CONF_TYPE_DHCP_ONE;
 522
 523         else if (ifcfg->method == CONFIG_METHOD_STATIC)
 524                 return NET_CONF_TYPE_STATIC;
 525
 526         assert(0);
 527         return NET_CONF_TYPE_DHCP_ALL;
 528 }
 529
 530 static void config_screen_setup_empty(struct config_screen *screen)
 531 {
 532         widget_new_label(screen->widgetset, 2, screen->field_x,
 533                         "Waiting for configuration data...");
 534         screen->widgets.cancel_b = widget_new_button(screen->widgetset,
 535                         4, screen->field_x, 6, "Cancel", cancel_click, screen);
 536 }
 537
 538
 539 static void config_screen_setup_widgets(struct config_screen *screen,
 540                 const struct config *config,
 541                 const struct system_info *sysinfo)
 542 {
 543         struct nc_widgetset *set = screen->widgetset;
 544         struct interface_config *ifcfg;
 545         char *str, *ip, *mask, *gw;
 546         enum net_conf_type type;
 547         unsigned int i;
 548         bool found;
 549
 550         build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
 551                         == N_FIELDS);
 552
 553         type = screen->net_conf_type;
 554         ifcfg = first_active_interface(config);
 555
 556         screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
 557         screen->widgets.autoboot_f = widget_new_select(set, 0, 0, 55);
 558
 559         widget_select_on_change(screen->widgets.autoboot_f,
 560                         config_screen_autoboot_change, screen);
 561
 562         screen->widgets.boot_device_f = widget_new_select(set, 0, 0, 55);
 563
 564         widget_select_add_option(screen->widgets.autoboot_f,
 565                                         AUTOBOOT_DISABLED,
 566                                         "Don't autoboot",
 567                                         screen->autoboot_type ==
 568                                                 AUTOBOOT_DISABLED);
 569         widget_select_add_option(screen->widgets.autoboot_f,
 570                                         AUTOBOOT_ANY,
 571                                         "Autoboot from any disk/network device",
 572                                         screen->autoboot_type ==
 573                                                 AUTOBOOT_ANY);
 574         widget_select_add_option(screen->widgets.autoboot_f,
 575                                         AUTOBOOT_ONE,
 576                                         "Only autoboot from a specific "
 577                                         "disk/network device",
 578                                         screen->autoboot_type ==
 579                                                 AUTOBOOT_ONE);
 580
 581         found = false;
 582
 583         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 584                 struct blockdev_info *bd = sysinfo->blockdevs[i];
 585                 bool selected;
 586                 char *label;
 587
 588                 selected = config->boot_device &&
 589                                 !strcmp(config->boot_device, bd->uuid);
 590                 if (selected)
 591                         found = true;
 592
 593                 label = talloc_asprintf(screen, "disk: %s [uuid: %s]",
 594                                 bd->name, bd->uuid);
 595
 596                 widget_select_add_option(screen->widgets.boot_device_f, i,
 597                                         label, selected);
 598         }
 599
 600         for (i = 0; i < sysinfo->n_interfaces; i++) {
 601                 struct interface_info *info = sysinfo->interfaces[i];
 602                 char *label, mac[20];
 603                 bool selected;
 604
 605                 mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
 606                 selected = config->boot_device &&
 607                                 !strcmp(config->boot_device, mac);
 608                 if (selected)
 609                         found = true;
 610
 611                 label = talloc_asprintf(screen, "net:  %s [mac: %s]",
 612                                 info->name, mac);
 613
 614                 widget_select_add_option(screen->widgets.boot_device_f,
 615                                                 i + sysinfo->n_blockdevs,
 616                                                 label, selected);
 617         }
 618
 619         if (screen->autoboot_type == AUTOBOOT_ONE && !found) {
 620                 char *label;
 621
 622                 label = talloc_asprintf(screen, "Unknown UUID: %s",
 623                                 config->boot_device);
 624
 625                 widget_select_add_option(screen->widgets.boot_device_f, -1,
 626                                                 label, true);
 627         }
 628
 629         str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
 630         screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
 631         screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
 632         screen->widgets.timeout_help_l = widget_new_label(set, 0, 0, "seconds");
 633
 634         widget_textbox_set_fixed_size(screen->widgets.timeout_f);
 635         widget_textbox_set_validator_integer(screen->widgets.timeout_f, 0, 999);
 636
 637         screen->widgets.network_l = widget_new_label(set, 0, 0, "Network");
 638         screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
 639
 640         widget_select_add_option(screen->widgets.network_f,
 641                                         NET_CONF_TYPE_DHCP_ALL,
 642                                         "DHCP on all active interfaces",
 643                                         type == NET_CONF_TYPE_DHCP_ALL);
 644         widget_select_add_option(screen->widgets.network_f,
 645                                         NET_CONF_TYPE_DHCP_ONE,
 646                                         "DHCP on a specific interface",
 647                                         type == NET_CONF_TYPE_DHCP_ONE);
 648         widget_select_add_option(screen->widgets.network_f,
 649                                         NET_CONF_TYPE_STATIC,
 650                                         "Static IP configuration",
 651                                         type == NET_CONF_TYPE_STATIC);
 652
 653         widget_select_on_change(screen->widgets.network_f,
 654                         config_screen_network_change, screen);
 655
 656         screen->widgets.iface_l = widget_new_label(set, 0, 0, "Device:");
 657         screen->widgets.iface_f = widget_new_select(set, 0, 0, 50);
 658
 659         for (i = 0; i < sysinfo->n_interfaces; i++) {
 660                 struct interface_info *info = sysinfo->interfaces[i];
 661                 char str[50], mac[20];
 662                 bool is_default;
 663
 664                 is_default = ifcfg && !memcmp(ifcfg->hwaddr, info->hwaddr,
 665                                         sizeof(ifcfg->hwaddr));
 666
 667                 mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
 668                 snprintf(str, sizeof(str), "%s [%s, %s]", info->name, mac,
 669                                 info->link ? "link up" : "link down");
 670
 671                 widget_select_add_option(screen->widgets.iface_f,
 672                                                 i, str, is_default);
 673         }
 674
 675         gw = ip = mask = NULL;
 676         if (ifcfg && ifcfg->method == CONFIG_METHOD_STATIC) {
 677                 char *sep;
 678
 679                 str = talloc_strdup(screen, ifcfg->static_config.address);
 680                 sep = strchr(str, '/');
 681                 ip = str;
 682
 683                 if (sep) {
 684                         *sep = '\0';
 685                         mask = sep + 1;
 686                 }
 687                 gw = ifcfg->static_config.gateway;
 688         }
 689
 690         screen->widgets.ip_addr_l = widget_new_label(set, 0, 0, "IP/mask:");
 691         screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
 692         screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
 693         screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 3, mask);
 694         screen->widgets.ip_addr_mask_help_l =
 695                 widget_new_label(set, 0, 0, "(eg. 192.168.0.10 / 24)");
 696
 697         widget_textbox_set_fixed_size(screen->widgets.ip_addr_f);
 698         widget_textbox_set_fixed_size(screen->widgets.ip_mask_f);
 699         widget_textbox_set_validator_ipv4(screen->widgets.ip_addr_f);
 700         widget_textbox_set_validator_integer(screen->widgets.ip_mask_f, 1, 31);
 701
 702         screen->widgets.gateway_l = widget_new_label(set, 0, 0, "Gateway:");
 703         screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
 704         screen->widgets.gateway_help_l =
 705                 widget_new_label(set, 0, 0, "(eg. 192.168.0.1)");
 706
 707         widget_textbox_set_fixed_size(screen->widgets.gateway_f);
 708         widget_textbox_set_validator_ipv4(screen->widgets.gateway_f);
 709
 710         str = talloc_strdup(screen, "");
 711         for (i = 0; i < config->network.n_dns_servers; i++) {
 712                 str = talloc_asprintf_append(str, "%s%s",
 713                                 (i == 0) ? "" : " ",
 714                                 config->network.dns_servers[i]);
 715         }
 716
 717         screen->widgets.dns_l = widget_new_label(set, 0, 0, "DNS Server(s):");
 718         screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
 719         screen->widgets.dns_help_l =
 720                 widget_new_label(set, 0, 0, "(eg. 192.168.0.2)");
 721
 722         widget_textbox_set_validator_ipv4_multi(screen->widgets.dns_f);
 723
 724         screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
 725                         "(if not provided by DHCP server)");
 726
 727         screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
 728                         ok_click, screen);
 729         screen->widgets.help_b = widget_new_button(set, 0, 0, 6, "Help",
 730                         help_click, screen);
 731         screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
 732                         cancel_click, screen);
 733 }
 734
 735 static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
 736 {
 737         struct config_screen *screen = arg;
 738         int w_y, s_max;
 739
 740         w_y = widget_y(widget) + widget_focus_y(widget);
 741         s_max = getmaxy(screen->scr.sub_ncw) - 1;
 742
 743         if (w_y < screen->scroll_y)
 744                 screen->scroll_y = w_y;
 745
 746         else if (w_y + screen->scroll_y + 1 > s_max)
 747                 screen->scroll_y = 1 + w_y - s_max;
 748
 749         else
 750                 return;
 751
 752         pad_refresh(screen);
 753 }
 754
 755 static void config_screen_draw(struct config_screen *screen,
 756                 const struct config *config,
 757                 const struct system_info *sysinfo)
 758 {
 759         bool repost = false;
 760         int height;
 761
 762         /* The size of the pad we'll need depends on the number of interfaces.
 763          *
 764          * We use N_FIELDS (which is quite conservative, as some fields share
 765          * a line) as a base, then add 3 (as the network select field is
 766          * takes 3 lines), and n_interfaces (as the network interface field
 767          * has n_interfaces lines).
 768          */
 769         height = N_FIELDS + 3;
 770         if (sysinfo)
 771                 height += sysinfo->n_interfaces;
 772         if (!screen->pad || getmaxy(screen->pad) < height) {
 773                 if (screen->pad)
 774                         delwin(screen->pad);
 775                 screen->pad = newpad(height, COLS);
 776         }
 777
 778         if (screen->widgetset) {
 779                 widgetset_unpost(screen->widgetset);
 780                 talloc_free(screen->widgetset);
 781                 repost = true;
 782         }
 783
 784         screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
 785                         screen->pad);
 786         widgetset_set_widget_focus(screen->widgetset,
 787                         config_screen_widget_focus, screen);
 788
 789         if (!config || !sysinfo) {
 790                 config_screen_setup_empty(screen);
 791         } else {
 792                 screen->net_conf_type = find_net_conf_type(config);
 793                 if (!config->autoboot_enabled)
 794                         screen->autoboot_type = AUTOBOOT_DISABLED;
 795                 else
 796                         screen->autoboot_type = config->boot_device ?
 797                                         AUTOBOOT_ONE : AUTOBOOT_ANY;
 798
 799                 config_screen_setup_widgets(screen, config, sysinfo);
 800                 config_screen_layout_widgets(screen);
 801         }
 802
 803         if (repost)
 804                 widgetset_post(screen->widgetset);
 805 }
 806
 807 void config_screen_update(struct config_screen *screen,
 808                 const struct config *config,
 809                 const struct system_info *sysinfo)
 810 {
 811         config_screen_draw(screen, config, sysinfo);
 812         pad_refresh(screen);
 813 }
 814
 815 static int config_screen_destroy(void *arg)
 816 {
 817         struct config_screen *screen = arg;
 818         if (screen->pad)
 819                 delwin(screen->pad);
 820         return 0;
 821 }
 822
 823 struct config_screen *config_screen_init(struct cui *cui,
 824                 const struct config *config,
 825                 const struct system_info *sysinfo,
 826                 void (*on_exit)(struct cui *))
 827 {
 828         struct config_screen *screen;
 829
 830         screen = talloc_zero(cui, struct config_screen);
 831         talloc_set_destructor(screen, config_screen_destroy);
 832         nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 833                         cui, config_screen_process_key,
 834                         config_screen_post, config_screen_unpost,
 835                         config_screen_resize);
 836
 837         screen->cui = cui;
 838         screen->on_exit = on_exit;
 839         screen->label_x = 2;
 840         screen->field_x = 17;
 841
 842         screen->scr.frame.ltitle = talloc_strdup(screen,
 843                         "Petitboot System Configuration");
 844         screen->scr.frame.rtitle = NULL;
 845         screen->scr.frame.help = talloc_strdup(screen,
 846                         "tab=next, shift+tab=previous, x=exit, h=help");
 847         nc_scr_frame_draw(&screen->scr);
 848
 849         scrollok(screen->scr.sub_ncw, true);
 850
 851         config_screen_draw(screen, config, sysinfo);
 852
 853         return screen;
 854 }