net/bootme.c

   1 /*
   2  * Copyright (C) 2012 Lothar Waßmann <LW@KARO-electronics.de>
   3  * based on: code from RedBoot (C) Uwe Steinkohl <US@KARO-electronics.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <net.h>
  27 #include <wince.h>
  28 #include <asm/errno.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 #define WINCE_VRAM_BASE         0x80000000
  33 #define CE_FIX_ADDRESS(a)       ((void *)((a) - WINCE_VRAM_BASE + CONFIG_SYS_SDRAM_BASE))
  34
  35 #ifndef INT_MAX
  36 #define INT_MAX                 ((int)(~0 >> 1))
  37 #endif
  38
  39 /* Bin image parse states */
  40 #define CE_PS_RTI_ADDR          0
  41 #define CE_PS_RTI_LEN           1
  42 #define CE_PS_E_ADDR            2
  43 #define CE_PS_E_LEN             3
  44 #define CE_PS_E_CHKSUM          4
  45 #define CE_PS_E_DATA            5
  46
  47 #define CE_MIN(a, b)            (((a) < (b)) ? (a) : (b))
  48 #define CE_MAX(a, b)            (((a) > (b)) ? (a) : (b))
  49
  50 #define _STRMAC(s)              #s
  51 #define STRMAC(s)               _STRMAC(s)
  52
  53 static enum bootme_state bootme_state;
  54 static int bootme_src_port = 0xdeadface;
  55 static int bootme_dst_port = 0xdeadbeef;
  56 static uchar bootme_ether[ETH_ALEN];
  57 static IPaddr_t bootme_ip;
  58 static int bootme_timed_out;
  59 //static size_t input_len, input_size;
  60 //static void *input_packet;
  61 static const char *output_packet; /* used by first send udp */
  62 static int output_packet_len;
  63 static unsigned long bootme_timeout;
  64 static bootme_hand_f *bootme_packet_handler;
  65
  66 #ifdef DEBUG
  67 static void __attribute__((unused)) ce_dump_block(const void *ptr, int length)
  68 {
  69         const char *p = ptr;
  70         int i;
  71         int j;
  72
  73         for (i = 0; i < length; i++) {
  74                 if (!(i % 16)) {
  75                         printf("\n%p: ", ptr + i);
  76                 }
  77
  78                 printf("%02x ", p[i]);
  79                 if (!((i + 1) % 16)){
  80                         printf("      ");
  81                         for (j = i - 15; j <= i; j++){
  82                                 if((p[j] > 0x1f) && (p[j] < 0x7f)) {
  83                                         printf("%c", p[j]);
  84                                 } else {
  85                                         printf(".");
  86                                 }
  87                         }
  88                 }
  89         }
  90         printf("\n");
  91 }
  92 #else
  93 static inline void ce_dump_block(void *ptr, int length)
  94 {
  95 }
  96 #endif
  97
  98 static void bootme_timeout_handler(void)
  99 {
 100         net_set_state(NETLOOP_SUCCESS);
 101         bootme_timed_out++;
 102 }
 103
 104 static inline int env_changed(int *id)
 105 {
 106         int env_id = get_env_id();
 107
 108         if (*id != env_id) {
 109                 debug("env_id: %d -> %d\n", *id, env_id);
 110                 *id = env_id;
 111                 return 1;
 112         }
 113         return 0;
 114 }
 115
 116 static int env_id;
 117
 118 static int is_broadcast(IPaddr_t ip)
 119 {
 120         static IPaddr_t netmask;
 121         static IPaddr_t our_ip;
 122
 123         return (ip == ~0 ||                             /* 255.255.255.255 */
 124             ((netmask & our_ip) == (netmask & ip) &&    /* on the same net */
 125             (netmask | ip) == ~0));             /* broadcast to our net */
 126 }
 127
 128 static int check_net_config(void)
 129 {
 130         if (env_changed(&env_id)) {
 131                 char *p;
 132                 char *bip;
 133
 134                 bootme_dst_port = EDBG_DOWNLOAD_PORT;
 135                 if (bootme_ip == 0) {
 136                         bip = getenv("bootmeip");
 137                         if (bip) {
 138                                 bootme_ip = getenv_IPaddr("bootmeip");
 139                                 if (!bootme_ip)
 140                                         return -EINVAL;
 141                                 p = strchr(bip, ':');
 142                                 if (p) {
 143                                         bootme_dst_port = simple_strtoul(p + 1, NULL, 10);
 144                                 }
 145                         } else {
 146                                 memset(&bootme_ip, 0xff, sizeof(bootme_ip));
 147                         }
 148                 }
 149
 150                 p = getenv("bootme_dst_port");
 151                 if (p)
 152                         bootme_dst_port = simple_strtoul(p, NULL, 10);
 153
 154                 p = getenv("bootme_src_port");
 155                 if (p)
 156                         bootme_src_port = simple_strtoul(p, NULL, 10);
 157                 else
 158                         bootme_src_port = bootme_dst_port;
 159
 160                 if (is_broadcast(bootme_ip))
 161                         memset(bootme_ether, 0xff, sizeof(bootme_ether));
 162                 else
 163                         memset(bootme_ether, 0, sizeof(bootme_ether));
 164
 165                 net_init();
 166                 NetServerIP = bootme_ip;
 167         }
 168         return 0;
 169 }
 170
 171 static void bootme_wait_arp_handler(uchar *pkt, unsigned dest,
 172                                 IPaddr_t sip, unsigned src,
 173                                 unsigned len)
 174 {
 175         net_set_state(NETLOOP_SUCCESS); /* got arp reply - quit net loop */
 176 }
 177
 178 static inline char next_cursor(char c)
 179 {
 180         switch(c) {
 181         case '-':
 182                 return '\\';
 183         case '\\':
 184                 return '|';
 185         case '|':
 186                 return '/';
 187         case '/':
 188                 return '-';
 189         }
 190         return 0;
 191 }
 192
 193 static void bootme_handler(uchar *pkt, unsigned dest_port, IPaddr_t src_ip,
 194                         unsigned src_port, unsigned len)
 195 {
 196         uchar *eth_pkt = pkt;
 197         unsigned eth_len = len;
 198         static char cursor = '|';
 199         enum bootme_state last_state = BOOTME_INIT;
 200 #if 1
 201         debug("received packet of len %d from %pI4:%d to port %d\n",
 202                 len, &src_ip, src_port, dest_port);
 203         ce_dump_block(pkt, len);
 204 #endif
 205         if (!bootme_packet_handler) {
 206                 printf("No packet handler set for BOOTME protocol; dropping packet\n");
 207                 return;
 208         }
 209         if (dest_port != bootme_src_port || !len)
 210                 return; /* not for us */
 211
 212         printf("%c\x08", cursor);
 213         cursor = next_cursor(cursor);
 214
 215         if (is_broadcast(bootme_ip)) {
 216                 bootme_ip = src_ip;
 217         } else if (src_ip != bootme_ip) {
 218                 debug("src_ip %pI4 does not match destination IP %pI4\n",
 219                         &src_ip, &bootme_ip);
 220                 return; /* not from our server */
 221         }
 222
 223         last_state = bootme_state;
 224         bootme_dst_port = src_port;
 225         debug("bootme_dst_port set to %d\n", bootme_dst_port);
 226         if (bootme_state == BOOTME_INIT) {
 227                 bootme_src_port = EDBG_SVC_PORT;
 228                 debug("%s: bootme_src_port set to %d\n", __func__, bootme_src_port);
 229         }
 230         bootme_state = bootme_packet_handler(eth_pkt, eth_len);
 231         debug("bootme_packet_handler() returned %d\n", bootme_state);
 232         if (bootme_state != last_state)
 233                 debug("bootme_state: %d -> %d\n", last_state, bootme_state);
 234         switch (bootme_state) {
 235         case BOOTME_INIT:
 236                 break;
 237
 238         case BOOTME_DOWNLOAD:
 239                 if (last_state != BOOTME_INIT)
 240                         NetBootFileXferSize += len - 4;
 241                 /* fallthru */
 242         case BOOTME_DEBUG:
 243                 if (last_state == BOOTME_INIT) {
 244                         bootme_timeout = 3 * 1000;
 245                 }
 246                 NetSetTimeout(bootme_timeout, bootme_timeout_handler);
 247                 break;
 248
 249         case BOOTME_DONE:
 250                 net_set_state(NETLOOP_SUCCESS);
 251                 bootme_packet_handler = NULL;
 252                 break;
 253
 254         case BOOTME_ERROR:
 255                 net_set_state(NETLOOP_FAIL);
 256                 bootme_packet_handler = NULL;
 257         }
 258 }
 259
 260 void BootmeStart(void)
 261 {
 262         if (bootme_state != BOOTME_DOWNLOAD)
 263                 check_net_config();
 264
 265         if (output_packet_len == 0 ||
 266                 memcmp(bootme_ether, NetEtherNullAddr, ETH_ALEN) != 0) {
 267                 /* wait for incoming packet */
 268                 net_set_udp_handler(bootme_handler);
 269                 bootme_timed_out = 0;
 270                 NetSetTimeout(bootme_timeout, bootme_timeout_handler);
 271         } else {
 272                 /* send ARP request */
 273                 uchar *pkt;
 274
 275                 net_set_arp_handler(bootme_wait_arp_handler);
 276                 assert(NetTxPacket != NULL);
 277                 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
 278                 memcpy(pkt, output_packet, output_packet_len);
 279                 NetSendUDPPacket(bootme_ether, bootme_ip, bootme_dst_port,
 280                                 bootme_src_port, output_packet_len);
 281         }
 282 }
 283
 284 int bootme_send_frame(const void *buf, size_t len)
 285 {
 286         int ret;
 287         struct eth_device *eth;
 288         int inited = 0;
 289         uchar *pkt;
 290
 291         eth = eth_get_dev();
 292         if (eth == NULL)
 293                 return -EINVAL;
 294
 295         if (bootme_state == BOOTME_INIT)
 296                 check_net_config();
 297
 298         debug("%s: buf: %p len: %u from %pI4:%d to %pI4:%d\n",
 299                 __func__, buf, len, &NetOurIP, bootme_src_port, &bootme_ip, bootme_dst_port);
 300
 301         if (memcmp(bootme_ether, NetEtherNullAddr, ETH_ALEN) == 0) {
 302                 if (eth->state == ETH_STATE_ACTIVE)
 303                         return 0;       /* inside net loop */
 304
 305                 output_packet = buf;
 306                 output_packet_len = len;
 307                 /* wait for arp reply and send packet */
 308                 ret = NetLoop(BOOTME);
 309                 if (ret < 0) {
 310                         /* drop packet */
 311                         output_packet_len = 0;
 312                         return ret;
 313                 }
 314                 if (bootme_timed_out)
 315                         return -ETIMEDOUT;
 316                 return 0;
 317         }
 318
 319         if (eth->state != ETH_STATE_ACTIVE) {
 320                 if (eth_is_on_demand_init()) {
 321                         ret = eth_init(gd->bd);
 322                         if (ret < 0)
 323                                 return ret;
 324                         eth_set_last_protocol(BOOTME);
 325                 } else {
 326                         eth_init_state_only(gd->bd);
 327                 }
 328                 inited = 1;
 329         }
 330
 331         assert(NetTxPacket != NULL);
 332         pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
 333         memcpy(pkt, buf, len);
 334
 335         ret = NetSendUDPPacket(bootme_ether, bootme_ip, bootme_dst_port,
 336                         bootme_src_port, len);
 337         if (inited) {
 338                 debug("Stopping network\n");
 339                 if (eth_is_on_demand_init())
 340                         eth_halt();
 341                 else
 342                         eth_halt_state_only();
 343         }
 344         return ret;
 345 }
 346
 347 static void bootme_init(IPaddr_t server_ip)
 348 {
 349         bootme_state = BOOTME_INIT;
 350         bootme_ip = server_ip;
 351         /* force reconfiguration in check_net_config() */
 352         env_id = 0;
 353 }
 354
 355 int BootMeDownload(bootme_hand_f *handler)
 356 {
 357         int ret;
 358
 359         bootme_packet_handler = handler;
 360
 361         ret = NetLoop(BOOTME);
 362         if (ret < 0)
 363                 return BOOTME_ERROR;
 364         if (bootme_timed_out && bootme_state != BOOTME_INIT)
 365                 return BOOTME_ERROR;
 366
 367         return bootme_state;
 368 }
 369
 370 int BootMeDebugStart(bootme_hand_f *handler)
 371 {
 372         int ret;
 373
 374         bootme_packet_handler = handler;
 375
 376         bootme_init(bootme_ip);
 377         bootme_state = BOOTME_DEBUG;
 378         bootme_timeout = 3 * 1000;
 379         NetSetTimeout(bootme_timeout, bootme_timeout_handler);
 380
 381         ret = NetLoop(BOOTME);
 382         if (ret < 0)
 383                 return BOOTME_ERROR;
 384         if (bootme_timed_out)
 385                 return BOOTME_DONE;
 386         return bootme_state;
 387 }
 388
 389 int BootMeRequest(IPaddr_t server_ip, const void *buf, size_t len, int timeout)
 390 {
 391         bootme_init(server_ip);
 392         bootme_timeout = timeout * 1000;
 393         bootme_timed_out = 0;
 394         NetSetTimeout(bootme_timeout, bootme_timeout_handler);
 395         return bootme_send_frame(buf, len);
 396 }