Merge tag 'u-boot-imx-20200108' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx
[oweals/u-boot.git] / net / tftp.c
index 966d1cfba360ce7e7505dd5f806ce13543b0654c..1e3c18ae69c0f975e22383fcdcba18bcee0eec38 100644 (file)
@@ -8,13 +8,18 @@
 
 #include <common.h>
 #include <command.h>
+#include <efi_loader.h>
+#include <env.h>
+#include <mapmem.h>
 #include <net.h>
-#include "tftp.h"
+#include <net/tftp.h>
 #include "bootp.h"
 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
 #include <flash.h>
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
 /* Well known TFTP port # */
 #define WELL_KNOWN_PORT        69
 /* Millisecs to timeout for lost pkt */
 #define TFTP_ERROR     5
 #define TFTP_OACK      6
 
-static ulong TftpTimeoutMSecs = TIMEOUT;
-static int TftpTimeoutCountMax = TIMEOUT_COUNT;
+static ulong timeout_ms = TIMEOUT;
+static int timeout_count_max = TIMEOUT_COUNT;
 static ulong time_start;   /* Record time we started tftp */
 
 /*
  * These globals govern the timeout behavior when attempting a connection to a
- * TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to
+ * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  * wait for the server to respond to initial connection. Second global,
- * TftpRRQTimeoutCountMax, gives the number of such connection retries.
- * TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be
+ * tftp_timeout_count_max, gives the number of such connection retries.
+ * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  * positive. The globals are meant to be set (and restored) by code needing
  * non-standard timeout behavior when initiating a TFTP transfer.
  */
-ulong TftpRRQTimeoutMSecs = TIMEOUT;
-int TftpRRQTimeoutCountMax = TIMEOUT_COUNT;
+ulong tftp_timeout_ms = TIMEOUT;
+int tftp_timeout_count_max = TIMEOUT_COUNT;
 
 enum {
        TFTP_ERR_UNDEFINED           = 0,
@@ -64,32 +69,38 @@ enum {
        TFTP_ERR_FILE_ALREADY_EXISTS = 6,
 };
 
-static IPaddr_t TftpRemoteIP;
+static struct in_addr tftp_remote_ip;
 /* The UDP port at their end */
-static int     TftpRemotePort;
+static int     tftp_remote_port;
 /* The UDP port at our end */
-static int     TftpOurPort;
-static int     TftpTimeoutCount;
+static int     tftp_our_port;
+static int     timeout_count;
 /* packet sequence number */
-static ulong   TftpBlock;
+static ulong   tftp_cur_block;
 /* last packet sequence number received */
-static ulong   TftpLastBlock;
+static ulong   tftp_prev_block;
 /* count of sequence number wraparounds */
-static ulong   TftpBlockWrap;
+static ulong   tftp_block_wrap;
 /* memory offset due to wrapping */
-static ulong   TftpBlockWrapOffset;
-static int     TftpState;
+static ulong   tftp_block_wrap_offset;
+static int     tftp_state;
+static ulong   tftp_load_addr;
+#ifdef CONFIG_LMB
+static ulong   tftp_load_size;
+#endif
 #ifdef CONFIG_TFTP_TSIZE
 /* The file size reported by the server */
-static int     TftpTsize;
+static int     tftp_tsize;
 /* The number of hashes we printed */
-static short   TftpNumchars;
+static short   tftp_tsize_num_hash;
 #endif
 #ifdef CONFIG_CMD_TFTPPUT
-static int     TftpWriting;    /* 1 if writing, else 0 */
-static int     TftpFinalBlock; /* 1 if we have sent the last block */
+/* 1 if writing, else 0 */
+static int     tftp_put_active;
+/* 1 if we have sent the last block */
+static int     tftp_put_final_block_sent;
 #else
-#define TftpWriting    0
+#define tftp_put_active        0
 #endif
 
 #define STATE_SEND_RRQ 1
@@ -127,40 +138,14 @@ static char tftp_filename[MAX_LEN];
 #define TFTP_MTU_BLOCKSIZE 1468
 #endif
 
-static unsigned short TftpBlkSize = TFTP_BLOCK_SIZE;
-static unsigned short TftpBlkSizeOption = TFTP_MTU_BLOCKSIZE;
-
-#ifdef CONFIG_MCAST_TFTP
-#include <malloc.h>
-#define MTFTP_BITMAPSIZE       0x1000
-static unsigned *Bitmap;
-static int PrevBitmapHole, Mapsize = MTFTP_BITMAPSIZE;
-static uchar ProhibitMcast, MasterClient;
-static uchar Multicast;
-static int Mcast_port;
-static ulong TftpEndingBlock; /* can get 'last' block before done..*/
-
-static void parse_multicast_oack(char *pkt, int len);
-
-static void
-mcast_cleanup(void)
-{
-       if (Mcast_addr)
-               eth_mcast_join(Mcast_addr, 0);
-       if (Bitmap)
-               free(Bitmap);
-       Bitmap = NULL;
-       Mcast_addr = Multicast = Mcast_port = 0;
-       TftpEndingBlock = -1;
-}
-
-#endif /* CONFIG_MCAST_TFTP */
+static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
+static unsigned short tftp_block_size_option = TFTP_MTU_BLOCKSIZE;
 
-static inline void
-store_block(int block, uchar *src, unsigned len)
+static inline int store_block(int block, uchar *src, unsigned int len)
 {
-       ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
+       ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
        ulong newsize = offset + len;
+       ulong store_addr = tftp_load_addr + offset;
 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
        int i, rc = 0;
 
@@ -168,41 +153,55 @@ store_block(int block, uchar *src, unsigned len)
                /* start address in flash? */
                if (flash_info[i].flash_id == FLASH_UNKNOWN)
                        continue;
-               if (load_addr + offset >= flash_info[i].start[0]) {
+               if (store_addr >= flash_info[i].start[0]) {
                        rc = 1;
                        break;
                }
        }
 
        if (rc) { /* Flash is destination for this packet */
-               rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
+               rc = flash_write((char *)src, store_addr, len);
                if (rc) {
                        flash_perror(rc);
-                       net_set_state(NETLOOP_FAIL);
-                       return;
+                       return rc;
                }
        } else
 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
        {
-               (void)memcpy((void *)(load_addr + offset), src, len);
-       }
-#ifdef CONFIG_MCAST_TFTP
-       if (Multicast)
-               ext2_set_bit(block, Bitmap);
+               void *ptr;
+
+#ifdef CONFIG_LMB
+               ulong end_addr = tftp_load_addr + tftp_load_size;
+
+               if (!end_addr)
+                       end_addr = ULONG_MAX;
+
+               if (store_addr < tftp_load_addr ||
+                   store_addr + len > end_addr) {
+                       puts("\nTFTP error: ");
+                       puts("trying to overwrite reserved memory...\n");
+                       return -1;
+               }
 #endif
+               ptr = map_sysmem(store_addr, len);
+               memcpy(ptr, src, len);
+               unmap_sysmem(ptr);
+       }
+
+       if (net_boot_file_size < newsize)
+               net_boot_file_size = newsize;
 
-       if (NetBootFileXferSize < newsize)
-               NetBootFileXferSize = newsize;
+       return 0;
 }
 
 /* Clear our state ready for a new transfer */
 static void new_transfer(void)
 {
-       TftpLastBlock = 0;
-       TftpBlockWrap = 0;
-       TftpBlockWrapOffset = 0;
+       tftp_prev_block = 0;
+       tftp_block_wrap = 0;
+       tftp_block_wrap_offset = 0;
 #ifdef CONFIG_CMD_TFTPPUT
-       TftpFinalBlock = 0;
+       tftp_put_final_block_sent = 0;
 #endif
 }
 
@@ -218,38 +217,41 @@ static void new_transfer(void)
 static int load_block(unsigned block, uchar *dst, unsigned len)
 {
        /* We may want to get the final block from the previous set */
-       ulong offset = ((int)block - 1) * len + TftpBlockWrapOffset;
+       ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
        ulong tosend = len;
 
-       tosend = min(NetBootFileXferSize - offset, tosend);
+       tosend = min(net_boot_file_size - offset, tosend);
        (void)memcpy(dst, (void *)(save_addr + offset), tosend);
        debug("%s: block=%d, offset=%ld, len=%d, tosend=%ld\n", __func__,
-               block, offset, len, tosend);
+             block, offset, len, tosend);
        return tosend;
 }
 #endif
 
-static void TftpSend(void);
-static void TftpTimeout(void);
+static void tftp_send(void);
+static void tftp_timeout_handler(void);
 
 /**********************************************************************/
 
 static void show_block_marker(void)
 {
 #ifdef CONFIG_TFTP_TSIZE
-       if (TftpTsize) {
-               ulong pos = TftpBlock * TftpBlkSize + TftpBlockWrapOffset;
+       if (tftp_tsize) {
+               ulong pos = tftp_cur_block * tftp_block_size +
+                       tftp_block_wrap_offset;
+               if (pos > tftp_tsize)
+                       pos = tftp_tsize;
 
-               while (TftpNumchars < pos * 50 / TftpTsize) {
+               while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
                        putc('#');
-                       TftpNumchars++;
+                       tftp_tsize_num_hash++;
                }
        } else
 #endif
        {
-               if (((TftpBlock - 1) % 10) == 0)
+               if (((tftp_cur_block - 1) % 10) == 0)
                        putc('#');
-               else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0)
+               else if ((tftp_cur_block % (10 * HASHES_PER_LINE)) == 0)
                        puts("\n\t ");
        }
 }
@@ -262,10 +264,7 @@ static void show_block_marker(void)
 static void restart(const char *msg)
 {
        printf("\n%s; starting again\n", msg);
-#ifdef CONFIG_MCAST_TFTP
-       mcast_cleanup();
-#endif
-       NetStartAgain();
+       net_start_again();
 }
 
 /*
@@ -281,10 +280,10 @@ static void update_block_number(void)
         * number of 0 this means that there was a wrap
         * around of the (16 bit) counter.
         */
-       if (TftpBlock == 0 && TftpLastBlock != 0) {
-               TftpBlockWrap++;
-               TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
-               TftpTimeoutCount = 0; /* we've done well, reset thhe timeout */
+       if (tftp_cur_block == 0 && tftp_prev_block != 0) {
+               tftp_block_wrap++;
+               tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
+               timeout_count = 0; /* we've done well, reset the timeout */
        } else {
                show_block_marker();
        }
@@ -295,49 +294,43 @@ static void tftp_complete(void)
 {
 #ifdef CONFIG_TFTP_TSIZE
        /* Print hash marks for the last packet received */
-       while (TftpTsize && TftpNumchars < 49) {
+       while (tftp_tsize && tftp_tsize_num_hash < 49) {
                putc('#');
-               TftpNumchars++;
+               tftp_tsize_num_hash++;
        }
+       puts("  ");
+       print_size(tftp_tsize, "");
 #endif
        time_start = get_timer(time_start);
        if (time_start > 0) {
                puts("\n\t ");  /* Line up with "Loading: " */
-               print_size(NetBootFileXferSize /
+               print_size(net_boot_file_size /
                        time_start * 1000, "/s");
        }
        puts("\ndone\n");
        net_set_state(NETLOOP_SUCCESS);
 }
 
-static void
-TftpSend(void)
+static void tftp_send(void)
 {
        uchar *pkt;
        uchar *xp;
        int len = 0;
        ushort *s;
 
-#ifdef CONFIG_MCAST_TFTP
-       /* Multicast TFTP.. non-MasterClients do not ACK data. */
-       if (Multicast
-        && (TftpState == STATE_DATA)
-        && (MasterClient == 0))
-               return;
-#endif
        /*
         *      We will always be sending some sort of packet, so
         *      cobble together the packet headers now.
         */
-       pkt = NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
+       pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
 
-       switch (TftpState) {
+       switch (tftp_state) {
        case STATE_SEND_RRQ:
        case STATE_SEND_WRQ:
                xp = pkt;
                s = (ushort *)pkt;
 #ifdef CONFIG_CMD_TFTPPUT
-               *s++ = htons(TftpState == STATE_SEND_RRQ ? TFTP_RRQ :
+               *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
                        TFTP_WRQ);
 #else
                *s++ = htons(TFTP_RRQ);
@@ -349,55 +342,36 @@ TftpSend(void)
                pkt += 5 /*strlen("octet")*/ + 1;
                strcpy((char *)pkt, "timeout");
                pkt += 7 /*strlen("timeout")*/ + 1;
-               sprintf((char *)pkt, "%lu", TftpTimeoutMSecs / 1000);
+               sprintf((char *)pkt, "%lu", timeout_ms / 1000);
                debug("send option \"timeout %s\"\n", (char *)pkt);
                pkt += strlen((char *)pkt) + 1;
 #ifdef CONFIG_TFTP_TSIZE
-               pkt += sprintf((char *)pkt, "tsize%c%lu%c",
-                               0, NetBootFileXferSize, 0);
+               pkt += sprintf((char *)pkt, "tsize%c%u%c",
+                               0, net_boot_file_size, 0);
 #endif
                /* try for more effic. blk size */
                pkt += sprintf((char *)pkt, "blksize%c%d%c",
-                               0, TftpBlkSizeOption, 0);
-#ifdef CONFIG_MCAST_TFTP
-               /* Check all preconditions before even trying the option */
-               if (!ProhibitMcast) {
-                       Bitmap = malloc(Mapsize);
-                       if (Bitmap && eth_get_dev()->mcast) {
-                               free(Bitmap);
-                               Bitmap = NULL;
-                               pkt += sprintf((char *)pkt, "multicast%c%c",
-                                       0, 0);
-                       }
-               }
-#endif /* CONFIG_MCAST_TFTP */
+                               0, tftp_block_size_option, 0);
                len = pkt - xp;
                break;
 
        case STATE_OACK:
-#ifdef CONFIG_MCAST_TFTP
-               /* My turn!  Start at where I need blocks I missed.*/
-               if (Multicast)
-                       TftpBlock = ext2_find_next_zero_bit(Bitmap,
-                                                           (Mapsize*8), 0);
-               /*..falling..*/
-#endif
 
        case STATE_RECV_WRQ:
        case STATE_DATA:
                xp = pkt;
                s = (ushort *)pkt;
                s[0] = htons(TFTP_ACK);
-               s[1] = htons(TftpBlock);
+               s[1] = htons(tftp_cur_block);
                pkt = (uchar *)(s + 2);
 #ifdef CONFIG_CMD_TFTPPUT
-               if (TftpWriting) {
-                       int toload = TftpBlkSize;
-                       int loaded = load_block(TftpBlock, pkt, toload);
+               if (tftp_put_active) {
+                       int toload = tftp_block_size;
+                       int loaded = load_block(tftp_cur_block, pkt, toload);
 
                        s[0] = htons(TFTP_DATA);
                        pkt += loaded;
-                       TftpFinalBlock = (loaded < toload);
+                       tftp_put_final_block_sent = (loaded < toload);
                }
 #endif
                len = pkt - xp;
@@ -427,13 +401,14 @@ TftpSend(void)
                break;
        }
 
-       NetSendUDPPacket(NetServerEther, TftpRemoteIP, TftpRemotePort,
-                        TftpOurPort, len);
+       net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
+                           tftp_remote_port, tftp_our_port, len);
 }
 
 #ifdef CONFIG_CMD_TFTPPUT
 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
-                        IPaddr_t sip, unsigned src, uchar *pkt, unsigned len)
+                        struct in_addr sip, unsigned src, uchar *pkt,
+                        unsigned len)
 {
        if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
                /* Oh dear the other end has gone away */
@@ -442,23 +417,18 @@ static void icmp_handler(unsigned type, unsigned code, unsigned dest,
 }
 #endif
 
-static void
-TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
-           unsigned len)
+static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
+                        unsigned src, unsigned len)
 {
        __be16 proto;
        __be16 *s;
        int i;
 
-       if (dest != TftpOurPort) {
-#ifdef CONFIG_MCAST_TFTP
-               if (Multicast
-                && (!Mcast_port || (dest != Mcast_port)))
-#endif
+       if (dest != tftp_our_port) {
                        return;
        }
-       if (TftpState != STATE_SEND_RRQ && src != TftpRemotePort &&
-           TftpState != STATE_RECV_WRQ && TftpState != STATE_SEND_WRQ)
+       if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
+           tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
                return;
 
        if (len < 2)
@@ -469,14 +439,13 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
        proto = *s++;
        pkt = (uchar *)s;
        switch (ntohs(proto)) {
-
        case TFTP_RRQ:
                break;
 
        case TFTP_ACK:
 #ifdef CONFIG_CMD_TFTPPUT
-               if (TftpWriting) {
-                       if (TftpFinalBlock) {
+               if (tftp_put_active) {
+                       if (tftp_put_final_block_sent) {
                                tftp_complete();
                        } else {
                                /*
@@ -484,12 +453,12 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
                                 * count to wrap just like the other end!
                                 */
                                int block = ntohs(*s);
-                               int ack_ok = (TftpBlock == block);
+                               int ack_ok = (tftp_cur_block == block);
 
-                               TftpBlock = (unsigned short)(block + 1);
+                               tftp_cur_block = (unsigned short)(block + 1);
                                update_block_number();
                                if (ack_ok)
-                                       TftpSend(); /* Send next data block */
+                                       tftp_send(); /* Send next data block */
                        }
                }
 #endif
@@ -501,144 +470,100 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 #ifdef CONFIG_CMD_TFTPSRV
        case TFTP_WRQ:
                debug("Got WRQ\n");
-               TftpRemoteIP = sip;
-               TftpRemotePort = src;
-               TftpOurPort = 1024 + (get_timer(0) % 3072);
+               tftp_remote_ip = sip;
+               tftp_remote_port = src;
+               tftp_our_port = 1024 + (get_timer(0) % 3072);
                new_transfer();
-               TftpSend(); /* Send ACK(0) */
+               tftp_send(); /* Send ACK(0) */
                break;
 #endif
 
        case TFTP_OACK:
                debug("Got OACK: %s %s\n",
-                       pkt,
-                       pkt + strlen((char *)pkt) + 1);
-               TftpState = STATE_OACK;
-               TftpRemotePort = src;
+                     pkt, pkt + strlen((char *)pkt) + 1);
+               tftp_state = STATE_OACK;
+               tftp_remote_port = src;
                /*
                 * Check for 'blksize' option.
                 * Careful: "i" is signed, "len" is unsigned, thus
                 * something like "len-8" may give a *huge* number
                 */
                for (i = 0; i+8 < len; i++) {
-                       if (strcmp((char *)pkt+i, "blksize") == 0) {
-                               TftpBlkSize = (unsigned short)
-                                       simple_strtoul((char *)pkt+i+8, NULL,
-                                                      10);
+                       if (strcmp((char *)pkt + i, "blksize") == 0) {
+                               tftp_block_size = (unsigned short)
+                                       simple_strtoul((char *)pkt + i + 8,
+                                                      NULL, 10);
                                debug("Blocksize ack: %s, %d\n",
-                                       (char *)pkt+i+8, TftpBlkSize);
+                                     (char *)pkt + i + 8, tftp_block_size);
                        }
 #ifdef CONFIG_TFTP_TSIZE
                        if (strcmp((char *)pkt+i, "tsize") == 0) {
-                               TftpTsize = simple_strtoul((char *)pkt+i+6,
+                               tftp_tsize = simple_strtoul((char *)pkt + i + 6,
                                                           NULL, 10);
                                debug("size = %s, %d\n",
-                                        (char *)pkt+i+6, TftpTsize);
+                                     (char *)pkt + i + 6, tftp_tsize);
                        }
 #endif
                }
-#ifdef CONFIG_MCAST_TFTP
-               parse_multicast_oack((char *)pkt, len-1);
-               if ((Multicast) && (!MasterClient))
-                       TftpState = STATE_DATA; /* passive.. */
-               else
-#endif
 #ifdef CONFIG_CMD_TFTPPUT
-               if (TftpWriting) {
+               if (tftp_put_active) {
                        /* Get ready to send the first block */
-                       TftpState = STATE_DATA;
-                       TftpBlock++;
+                       tftp_state = STATE_DATA;
+                       tftp_cur_block++;
                }
 #endif
-               TftpSend(); /* Send ACK or first data block */
+               tftp_send(); /* Send ACK or first data block */
                break;
        case TFTP_DATA:
                if (len < 2)
                        return;
                len -= 2;
-               TftpBlock = ntohs(*(__be16 *)pkt);
+               tftp_cur_block = ntohs(*(__be16 *)pkt);
 
                update_block_number();
 
-               if (TftpState == STATE_SEND_RRQ)
+               if (tftp_state == STATE_SEND_RRQ)
                        debug("Server did not acknowledge timeout option!\n");
 
-               if (TftpState == STATE_SEND_RRQ || TftpState == STATE_OACK ||
-                   TftpState == STATE_RECV_WRQ) {
+               if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
+                   tftp_state == STATE_RECV_WRQ) {
                        /* first block received */
-                       TftpState = STATE_DATA;
-                       TftpRemotePort = src;
+                       tftp_state = STATE_DATA;
+                       tftp_remote_port = src;
                        new_transfer();
 
-#ifdef CONFIG_MCAST_TFTP
-                       if (Multicast) { /* start!=1 common if mcast */
-                               TftpLastBlock = TftpBlock - 1;
-                       } else
-#endif
-                       if (TftpBlock != 1) {   /* Assertion */
-                               printf("\nTFTP error: "
-                                      "First block is not block 1 (%ld)\n"
-                                      "Starting again\n\n",
-                                       TftpBlock);
-                               NetStartAgain();
+                       if (tftp_cur_block != 1) {      /* Assertion */
+                               puts("\nTFTP error: ");
+                               printf("First block is not block 1 (%ld)\n",
+                                      tftp_cur_block);
+                               puts("Starting again\n\n");
+                               net_start_again();
                                break;
                        }
                }
 
-               if (TftpBlock == TftpLastBlock) {
-                       /*
-                        *      Same block again; ignore it.
-                        */
+               if (tftp_cur_block == tftp_prev_block) {
+                       /* Same block again; ignore it. */
                        break;
                }
 
-               TftpLastBlock = TftpBlock;
-               TftpTimeoutCountMax = TIMEOUT_COUNT;
-               NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+               tftp_prev_block = tftp_cur_block;
+               timeout_count_max = tftp_timeout_count_max;
+               net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 
-               store_block(TftpBlock - 1, pkt + 2, len);
+               if (store_block(tftp_cur_block - 1, pkt + 2, len)) {
+                       eth_halt();
+                       net_set_state(NETLOOP_FAIL);
+                       break;
+               }
 
                /*
                 *      Acknowledge the block just received, which will prompt
                 *      the remote for the next one.
                 */
-#ifdef CONFIG_MCAST_TFTP
-               /* if I am the MasterClient, actively calculate what my next
-                * needed block is; else I'm passive; not ACKING
-                */
-               if (Multicast) {
-                       if (len < TftpBlkSize)  {
-                               TftpEndingBlock = TftpBlock;
-                       } else if (MasterClient) {
-                               TftpBlock = PrevBitmapHole =
-                                       ext2_find_next_zero_bit(
-                                               Bitmap,
-                                               (Mapsize*8),
-                                               PrevBitmapHole);
-                               if (TftpBlock > ((Mapsize*8) - 1)) {
-                                       printf("tftpfile too big\n");
-                                       /* try to double it and retry */
-                                       Mapsize <<= 1;
-                                       mcast_cleanup();
-                                       NetStartAgain();
-                                       return;
-                               }
-                               TftpLastBlock = TftpBlock;
-                       }
-               }
-#endif
-               TftpSend();
-
-#ifdef CONFIG_MCAST_TFTP
-               if (Multicast) {
-                       if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
-                               puts("\nMulticast tftp done\n");
-                               mcast_cleanup();
-                               net_set_state(NETLOOP_SUCCESS);
-                       }
-               } else
-#endif
-               if (len < TftpBlkSize)
+               tftp_send();
+
+               if (len < tftp_block_size)
                        tftp_complete();
                break;
 
@@ -660,10 +585,7 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
                case TFTP_ERR_FILE_ALREADY_EXISTS:
                default:
                        puts("Starting again\n\n");
-#ifdef CONFIG_MCAST_TFTP
-                       mcast_cleanup();
-#endif
-                       NetStartAgain();
+                       net_start_again();
                        break;
                }
                break;
@@ -671,70 +593,88 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 }
 
 
-static void
-TftpTimeout(void)
+static void tftp_timeout_handler(void)
 {
-       if (++TftpTimeoutCount > TftpTimeoutCountMax) {
+       if (++timeout_count > timeout_count_max) {
                restart("Retry count exceeded");
        } else {
                puts("T ");
-               NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
-               if (TftpState != STATE_RECV_WRQ)
-                       TftpSend();
+               net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
+               if (tftp_state != STATE_RECV_WRQ)
+                       tftp_send();
        }
 }
 
+/* Initialize tftp_load_addr and tftp_load_size from load_addr and lmb */
+static int tftp_init_load_addr(void)
+{
+#ifdef CONFIG_LMB
+       struct lmb lmb;
+       phys_size_t max_size;
+
+       lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
+
+       max_size = lmb_get_free_size(&lmb, load_addr);
+       if (!max_size)
+               return -1;
+
+       tftp_load_size = max_size;
+#endif
+       tftp_load_addr = load_addr;
+       return 0;
+}
 
-void TftpStart(enum proto_t protocol)
+void tftp_start(enum proto_t protocol)
 {
+#if CONFIG_NET_TFTP_VARS
        char *ep;             /* Environment pointer */
 
        /*
         * Allow the user to choose TFTP blocksize and timeout.
         * TFTP protocol has a minimal timeout of 1 second.
         */
-       ep = getenv("tftpblocksize");
+
+       ep = env_get("tftpblocksize");
+       if (ep != NULL)
+               tftp_block_size_option = simple_strtol(ep, NULL, 10);
+
+       ep = env_get("tftptimeout");
        if (ep != NULL)
-               TftpBlkSizeOption = simple_strtol(ep, NULL, 10);
+               timeout_ms = simple_strtol(ep, NULL, 10);
 
-       ep = getenv("tftptimeout");
+       if (timeout_ms < 1000) {
+               printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
+                      timeout_ms);
+               timeout_ms = 1000;
+       }
+
+       ep = env_get("tftptimeoutcountmax");
        if (ep != NULL)
-               TftpTimeoutMSecs = simple_strtol(ep, NULL, 10);
+               tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
 
-       if (TftpTimeoutMSecs < 1000) {
-               printf("TFTP timeout (%ld ms) too low, "
-                       "set minimum = 1000 ms\n",
-                       TftpTimeoutMSecs);
-               TftpTimeoutMSecs = 1000;
+       if (tftp_timeout_count_max < 0) {
+               printf("TFTP timeout count max (%d ms) negative, set to 0\n",
+                      tftp_timeout_count_max);
+               tftp_timeout_count_max = 0;
        }
+#endif
 
        debug("TFTP blocksize = %i, timeout = %ld ms\n",
-               TftpBlkSizeOption, TftpTimeoutMSecs);
+             tftp_block_size_option, timeout_ms);
 
-       TftpRemoteIP = NetServerIP;
-       if (BootFile[0] == '\0') {
+       tftp_remote_ip = net_server_ip;
+       if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
                sprintf(default_filename, "%02X%02X%02X%02X.img",
-                       NetOurIP & 0xFF,
-                       (NetOurIP >>  8) & 0xFF,
-                       (NetOurIP >> 16) & 0xFF,
-                       (NetOurIP >> 24) & 0xFF);
+                       net_ip.s_addr & 0xFF,
+                       (net_ip.s_addr >>  8) & 0xFF,
+                       (net_ip.s_addr >> 16) & 0xFF,
+                       (net_ip.s_addr >> 24) & 0xFF);
 
-               strncpy(tftp_filename, default_filename, MAX_LEN);
-               tftp_filename[MAX_LEN-1] = 0;
+               strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
+               tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
 
                printf("*** Warning: no boot file name; using '%s'\n",
-                       tftp_filename);
-       } else {
-               char *p = strchr(BootFile, ':');
-
-               if (p == NULL) {
-                       strncpy(tftp_filename, BootFile, MAX_LEN);
-                       tftp_filename[MAX_LEN-1] = 0;
-               } else {
-                       TftpRemoteIP = string_to_ip(BootFile);
-                       strncpy(tftp_filename, p + 1, MAX_LEN);
-                       tftp_filename[MAX_LEN-1] = 0;
-               }
+                      tftp_filename);
        }
 
        printf("Using %s device\n", eth_get_name());
@@ -742,208 +682,130 @@ void TftpStart(enum proto_t protocol)
 #ifdef CONFIG_CMD_TFTPPUT
               protocol == TFTPPUT ? "to" : "from",
 #else
-               "from",
+              "from",
 #endif
-               &TftpRemoteIP, &NetOurIP);
+              &tftp_remote_ip, &net_ip);
 
        /* Check if we need to send across this subnet */
-       if (NetOurGatewayIP && NetOurSubnetMask) {
-               IPaddr_t OurNet = NetOurIP    & NetOurSubnetMask;
-               IPaddr_t RemoteNet      = TftpRemoteIP & NetOurSubnetMask;
-
-               if (OurNet != RemoteNet)
-                       printf("; sending through gateway %pI4",
-                              &NetOurGatewayIP);
+       if (net_gateway.s_addr && net_netmask.s_addr) {
+               struct in_addr our_net;
+               struct in_addr remote_net;
+
+               our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
+               remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
+               if (our_net.s_addr != remote_net.s_addr)
+                       printf("; sending through gateway %pI4", &net_gateway);
        }
        putc('\n');
 
        printf("Filename '%s'.", tftp_filename);
 
-       if (NetBootFileSize) {
-               printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
-               print_size(NetBootFileSize<<9, "");
+       if (net_boot_file_expected_size_in_blocks) {
+               printf(" Size is 0x%x Bytes = ",
+                      net_boot_file_expected_size_in_blocks << 9);
+               print_size(net_boot_file_expected_size_in_blocks << 9, "");
        }
 
        putc('\n');
 #ifdef CONFIG_CMD_TFTPPUT
-       TftpWriting = (protocol == TFTPPUT);
-       if (TftpWriting) {
+       tftp_put_active = (protocol == TFTPPUT);
+       if (tftp_put_active) {
                printf("Save address: 0x%lx\n", save_addr);
                printf("Save size:    0x%lx\n", save_size);
-               NetBootFileXferSize = save_size;
+               net_boot_file_size = save_size;
                puts("Saving: *\b");
-               TftpState = STATE_SEND_WRQ;
+               tftp_state = STATE_SEND_WRQ;
                new_transfer();
        } else
 #endif
        {
-               printf("Load address: 0x%lx\n", load_addr);
+               if (tftp_init_load_addr()) {
+                       eth_halt();
+                       net_set_state(NETLOOP_FAIL);
+                       puts("\nTFTP error: ");
+                       puts("trying to overwrite reserved memory...\n");
+                       return;
+               }
+               printf("Load address: 0x%lx\n", tftp_load_addr);
                puts("Loading: *\b");
-               TftpState = STATE_SEND_RRQ;
+               tftp_state = STATE_SEND_RRQ;
+#ifdef CONFIG_CMD_BOOTEFI
+               efi_set_bootdev("Net", "", tftp_filename);
+#endif
        }
 
        time_start = get_timer(0);
-       TftpTimeoutCountMax = TftpRRQTimeoutCountMax;
+       timeout_count_max = tftp_timeout_count_max;
 
-       NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
-       net_set_udp_handler(TftpHandler);
+       net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
+       net_set_udp_handler(tftp_handler);
 #ifdef CONFIG_CMD_TFTPPUT
        net_set_icmp_handler(icmp_handler);
 #endif
-       TftpRemotePort = WELL_KNOWN_PORT;
-       TftpTimeoutCount = 0;
+       tftp_remote_port = WELL_KNOWN_PORT;
+       timeout_count = 0;
        /* Use a pseudo-random port unless a specific port is set */
-       TftpOurPort = 1024 + (get_timer(0) % 3072);
+       tftp_our_port = 1024 + (get_timer(0) % 3072);
 
 #ifdef CONFIG_TFTP_PORT
-       ep = getenv("tftpdstp");
+       ep = env_get("tftpdstp");
        if (ep != NULL)
-               TftpRemotePort = simple_strtol(ep, NULL, 10);
-       ep = getenv("tftpsrcp");
+               tftp_remote_port = simple_strtol(ep, NULL, 10);
+       ep = env_get("tftpsrcp");
        if (ep != NULL)
-               TftpOurPort = simple_strtol(ep, NULL, 10);
+               tftp_our_port = simple_strtol(ep, NULL, 10);
 #endif
-       TftpBlock = 0;
+       tftp_cur_block = 0;
 
        /* zero out server ether in case the server ip has changed */
-       memset(NetServerEther, 0, 6);
-       /* Revert TftpBlkSize to dflt */
-       TftpBlkSize = TFTP_BLOCK_SIZE;
-#ifdef CONFIG_MCAST_TFTP
-       mcast_cleanup();
-#endif
+       memset(net_server_ethaddr, 0, 6);
+       /* Revert tftp_block_size to dflt */
+       tftp_block_size = TFTP_BLOCK_SIZE;
 #ifdef CONFIG_TFTP_TSIZE
-       TftpTsize = 0;
-       TftpNumchars = 0;
+       tftp_tsize = 0;
+       tftp_tsize_num_hash = 0;
 #endif
 
-       TftpSend();
+       tftp_send();
 }
 
 #ifdef CONFIG_CMD_TFTPSRV
-void
-TftpStartServer(void)
+void tftp_start_server(void)
 {
        tftp_filename[0] = 0;
 
+       if (tftp_init_load_addr()) {
+               eth_halt();
+               net_set_state(NETLOOP_FAIL);
+               puts("\nTFTP error: trying to overwrite reserved memory...\n");
+               return;
+       }
        printf("Using %s device\n", eth_get_name());
-       printf("Listening for TFTP transfer on %pI4\n", &NetOurIP);
-       printf("Load address: 0x%lx\n", load_addr);
+       printf("Listening for TFTP transfer on %pI4\n", &net_ip);
+       printf("Load address: 0x%lx\n", tftp_load_addr);
 
        puts("Loading: *\b");
 
-       TftpTimeoutCountMax = TIMEOUT_COUNT;
-       TftpTimeoutCount = 0;
-       TftpTimeoutMSecs = TIMEOUT;
-       NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+       timeout_count_max = tftp_timeout_count_max;
+       timeout_count = 0;
+       timeout_ms = TIMEOUT;
+       net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 
-       /* Revert TftpBlkSize to dflt */
-       TftpBlkSize = TFTP_BLOCK_SIZE;
-       TftpBlock = 0;
-       TftpOurPort = WELL_KNOWN_PORT;
+       /* Revert tftp_block_size to dflt */
+       tftp_block_size = TFTP_BLOCK_SIZE;
+       tftp_cur_block = 0;
+       tftp_our_port = WELL_KNOWN_PORT;
 
 #ifdef CONFIG_TFTP_TSIZE
-       TftpTsize = 0;
-       TftpNumchars = 0;
+       tftp_tsize = 0;
+       tftp_tsize_num_hash = 0;
 #endif
 
-       TftpState = STATE_RECV_WRQ;
-       net_set_udp_handler(TftpHandler);
+       tftp_state = STATE_RECV_WRQ;
+       net_set_udp_handler(tftp_handler);
 
        /* zero out server ether in case the server ip has changed */
-       memset(NetServerEther, 0, 6);
+       memset(net_server_ethaddr, 0, 6);
 }
 #endif /* CONFIG_CMD_TFTPSRV */
 
-#ifdef CONFIG_MCAST_TFTP
-/* Credits: atftp project.
- */
-
-/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
- * Frame:
- *    +-------+-----------+---+-------~~-------+---+
- *    |  opc  | multicast | 0 | addr, port, mc | 0 |
- *    +-------+-----------+---+-------~~-------+---+
- * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
- * I am the new master-client so must send ACKs to DataBlocks.  If I am not
- * master-client, I'm a passive client, gathering what DataBlocks I may and
- * making note of which ones I got in my bitmask.
- * In theory, I never go from master->passive..
- * .. this comes in with pkt already pointing just past opc
- */
-static void parse_multicast_oack(char *pkt, int len)
-{
-       int i;
-       IPaddr_t addr;
-       char *mc_adr, *port,  *mc;
-
-       mc_adr = port = mc = NULL;
-       /* march along looking for 'multicast\0', which has to start at least
-        * 14 bytes back from the end.
-        */
-       for (i = 0; i < len-14; i++)
-               if (strcmp(pkt+i, "multicast") == 0)
-                       break;
-       if (i >= (len-14)) /* non-Multicast OACK, ign. */
-               return;
-
-       i += 10; /* strlen multicast */
-       mc_adr = pkt+i;
-       for (; i < len; i++) {
-               if (*(pkt+i) == ',') {
-                       *(pkt+i) = '\0';
-                       if (port) {
-                               mc = pkt+i+1;
-                               break;
-                       } else {
-                               port = pkt+i+1;
-                       }
-               }
-       }
-       if (!port || !mc_adr || !mc)
-               return;
-       if (Multicast && MasterClient) {
-               printf("I got a OACK as master Client, WRONG!\n");
-               return;
-       }
-       /* ..I now accept packets destined for this MCAST addr, port */
-       if (!Multicast) {
-               if (Bitmap) {
-                       printf("Internal failure! no mcast.\n");
-                       free(Bitmap);
-                       Bitmap = NULL;
-                       ProhibitMcast = 1;
-                       return ;
-               }
-               /* I malloc instead of pre-declare; so that if the file ends
-                * up being too big for this bitmap I can retry
-                */
-               Bitmap = malloc(Mapsize);
-               if (!Bitmap) {
-                       printf("No Bitmap, no multicast. Sorry.\n");
-                       ProhibitMcast = 1;
-                       return;
-               }
-               memset(Bitmap, 0, Mapsize);
-               PrevBitmapHole = 0;
-               Multicast = 1;
-       }
-       addr = string_to_ip(mc_adr);
-       if (Mcast_addr != addr) {
-               if (Mcast_addr)
-                       eth_mcast_join(Mcast_addr, 0);
-               Mcast_addr = addr;
-               if (eth_mcast_join(Mcast_addr, 1)) {
-                       printf("Fail to set mcast, revert to TFTP\n");
-                       ProhibitMcast = 1;
-                       mcast_cleanup();
-                       NetStartAgain();
-               }
-       }
-       MasterClient = (unsigned char)simple_strtoul((char *)mc, NULL, 10);
-       Mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
-       printf("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
-       return;
-}
-
-#endif /* Multicast TFTP */