2 * Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 FILE_LICENCE ( GPL2_OR_LATER );
30 #include <ipxe/console.h>
31 #include <ipxe/dhcp.h>
32 #include <ipxe/keys.h>
33 #include <ipxe/timer.h>
35 #include <ipxe/ansicol.h>
36 #include <usr/dhcpmgmt.h>
37 #include <usr/autoboot.h>
45 /** A PXE boot menu item */
46 struct pxe_menu_item {
47 /** Boot Server type */
56 * This structure encapsulates the menu information provided via DHCP
60 /** Prompt string (optional) */
62 /** Timeout (in seconds)
64 * Negative indicates no timeout (i.e. wait indefinitely)
67 /** Number of menu items */
68 unsigned int num_items;
69 /** Selected menu item */
70 unsigned int selection;
72 struct pxe_menu_item items[0];
76 * Parse and allocate PXE boot menu
78 * @v menu PXE boot menu to fill in
79 * @ret rc Return status code
81 * It is the callers responsibility to eventually free the allocated
84 static int pxe_menu_parse ( struct pxe_menu **menu ) {
85 struct setting pxe_boot_menu_prompt_setting =
86 { .tag = DHCP_PXE_BOOT_MENU_PROMPT };
87 struct setting pxe_boot_menu_setting =
88 { .tag = DHCP_PXE_BOOT_MENU };
89 uint8_t raw_menu[256];
92 struct dhcp_pxe_boot_menu *raw_menu_item;
93 struct dhcp_pxe_boot_menu_prompt *raw_menu_prompt;
95 unsigned int num_menu_items;
100 memset ( raw_menu, 0, sizeof ( raw_menu ) );
101 if ( ( raw_menu_len = fetch_raw_setting ( NULL, &pxe_boot_menu_setting,
103 sizeof ( raw_menu ) ) ) < 0 ){
105 DBG ( "Could not retrieve raw PXE boot menu: %s\n",
109 if ( raw_menu_len >= ( int ) sizeof ( raw_menu ) ) {
110 DBG ( "Raw PXE boot menu too large for buffer\n" );
113 raw_menu_end = ( raw_menu + raw_menu_len );
115 /* Fetch raw prompt length */
117 fetch_raw_setting ( NULL, &pxe_boot_menu_prompt_setting,
119 if ( raw_prompt_len < 0 )
122 /* Count menu items */
124 raw_menu_item = ( ( void * ) raw_menu );
126 if ( ( ( ( void * ) raw_menu_item ) +
127 sizeof ( *raw_menu_item ) ) > raw_menu_end )
129 if ( ( ( ( void * ) raw_menu_item ) +
130 sizeof ( *raw_menu_item ) +
131 raw_menu_item->desc_len ) > raw_menu_end )
134 raw_menu_item = ( ( ( void * ) raw_menu_item ) +
135 sizeof ( *raw_menu_item ) +
136 raw_menu_item->desc_len );
139 /* Allocate space for parsed menu */
140 *menu = zalloc ( sizeof ( **menu ) +
141 ( num_menu_items * sizeof ( (*menu)->items[0] ) ) +
142 raw_menu_len + 1 /* NUL */ +
143 raw_prompt_len + 1 /* NUL */ );
145 DBG ( "Could not allocate PXE boot menu\n" );
149 /* Fill in parsed menu */
150 (*menu)->num_items = num_menu_items;
151 raw_menu_item = ( ( ( void * ) (*menu) ) + sizeof ( **menu ) +
152 ( num_menu_items * sizeof ( (*menu)->items[0] ) ) );
153 memcpy ( raw_menu_item, raw_menu, raw_menu_len );
154 for ( i = 0 ; i < num_menu_items ; i++ ) {
155 (*menu)->items[i].type = le16_to_cpu ( raw_menu_item->type );
156 (*menu)->items[i].desc = raw_menu_item->desc;
157 /* Set type to 0; this ensures that the description
158 * for the previous menu item is NUL-terminated.
159 * (Final item is NUL-terminated anyway.)
161 raw_menu_item->type = 0;
162 raw_menu_item = ( ( ( void * ) raw_menu_item ) +
163 sizeof ( *raw_menu_item ) +
164 raw_menu_item->desc_len );
166 if ( raw_prompt_len ) {
167 raw_menu_prompt = ( ( ( void * ) raw_menu_item ) +
169 fetch_raw_setting ( NULL, &pxe_boot_menu_prompt_setting,
170 raw_menu_prompt, raw_prompt_len );
172 ( ( raw_menu_prompt->timeout == 0xff ) ?
173 -1 : raw_menu_prompt->timeout );
174 (*menu)->prompt = raw_menu_prompt->prompt;
176 (*menu)->timeout = -1;
183 * Draw PXE boot menu item
185 * @v menu PXE boot menu
186 * @v index Index of item to draw
187 * @v selected Item is selected
189 static void pxe_menu_draw_item ( struct pxe_menu *menu,
190 unsigned int index, int selected ) {
195 /* Prepare space-padded row content */
196 len = snprintf ( buf, sizeof ( buf ), " %c. %s",
197 ( 'A' + index ), menu->items[index].desc );
198 while ( len < ( sizeof ( buf ) - 1 ) )
200 buf[ sizeof ( buf ) - 1 ] = '\0';
203 row = ( LINES - menu->num_items + index );
204 color_set ( ( selected ? CPAIR_PXE : CPAIR_DEFAULT ), NULL );
205 mvprintw ( row, 0, "%s", buf );
210 * Make selection from PXE boot menu
212 * @v menu PXE boot menu
213 * @ret rc Return status code
215 static int pxe_menu_select ( struct pxe_menu *menu ) {
217 unsigned int key_selection;
224 color_set ( CPAIR_DEFAULT, NULL );
226 /* Draw initial menu */
227 for ( i = 0 ; i < menu->num_items ; i++ )
229 for ( i = 0 ; i < menu->num_items ; i++ )
230 pxe_menu_draw_item ( menu, ( menu->num_items - i - 1 ), 0 );
234 /* Highlight currently selected item */
235 pxe_menu_draw_item ( menu, menu->selection, 1 );
237 /* Wait for keyboard input */
240 /* Unhighlight currently selected item */
241 pxe_menu_draw_item ( menu, menu->selection, 0 );
244 if ( ( key == CR ) || ( key == LF ) ) {
245 pxe_menu_draw_item ( menu, menu->selection, 1 );
247 } else if ( ( key == CTRL_C ) || ( key == ESC ) ) {
250 } else if ( key == KEY_UP ) {
251 if ( menu->selection > 0 )
253 } else if ( key == KEY_DOWN ) {
254 if ( menu->selection < ( menu->num_items - 1 ) )
256 } else if ( ( key < KEY_MIN ) &&
257 ( ( key_selection = ( toupper ( key ) - 'A' ) )
258 < menu->num_items ) ) {
259 menu->selection = key_selection;
260 pxe_menu_draw_item ( menu, menu->selection, 1 );
272 * Prompt for (and make selection from) PXE boot menu
274 * @v menu PXE boot menu
275 * @ret rc Return status code
277 static int pxe_menu_prompt_and_select ( struct pxe_menu *menu ) {
278 unsigned long start = currticks();
280 unsigned long elapsed;
285 /* Display menu immediately, if specified to do so */
286 if ( menu->timeout < 0 ) {
288 printf ( "%s\n", menu->prompt );
289 return pxe_menu_select ( menu );
292 /* Display prompt, if specified */
294 printf ( "%s", menu->prompt );
296 /* Wait for timeout, if specified */
297 while ( menu->timeout > 0 ) {
299 len = printf ( " (%d)", menu->timeout );
302 if ( key == KEY_F8 ) {
305 return pxe_menu_select ( menu );
306 } else if ( ( key == CTRL_C ) || ( key == ESC ) ) {
316 elapsed = ( now - start );
317 if ( elapsed >= TICKS_PER_SEC ) {
326 /* Return with default option selected */
332 * Boot using PXE boot menu
334 * @ret rc Return status code
336 * Note that a success return status indicates that a PXE boot menu
337 * item has been selected, and that the DHCP session should perform a
338 * boot server request/ack.
340 int pxe_menu_boot ( struct net_device *netdev ) {
341 struct pxe_menu *menu;
342 unsigned int pxe_type;
343 struct settings *pxebs_settings;
347 /* Parse and allocate boot menu */
348 if ( ( rc = pxe_menu_parse ( &menu ) ) != 0 )
351 /* Make selection from boot menu */
352 if ( ( rc = pxe_menu_prompt_and_select ( menu ) ) != 0 ) {
356 pxe_type = menu->items[menu->selection].type;
361 /* Return immediately if local boot selected */
365 /* Attempt PXE Boot Server Discovery */
366 if ( ( rc = pxebs ( netdev, pxe_type ) ) != 0 )
369 /* Fetch next server and filename */
370 pxebs_settings = find_settings ( PXEBS_SETTINGS_NAME );
371 assert ( pxebs_settings );
372 uri = fetch_next_server_and_filename ( pxebs_settings );
377 rc = uriboot ( uri, NULL, 0, URIBOOT_NO_SAN );