Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 949 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/net/tftp.c b/qemu/roms/u-boot/net/tftp.c
new file mode 100644
index 000000000..966d1cfba
--- /dev/null
+++ b/qemu/roms/u-boot/net/tftp.c
@@ -0,0 +1,949 @@
+/*
+ * Copyright 1994, 1995, 2000 Neil Russell.
+ * (See License)
+ * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
+ * Copyright 2011 Comelit Group SpA,
+ *                Luca Ceresoli <luca.ceresoli@comelit.it>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include "tftp.h"
+#include "bootp.h"
+#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
+#include <flash.h>
+#endif
+
+/* Well known TFTP port # */
+#define WELL_KNOWN_PORT	69
+/* Millisecs to timeout for lost pkt */
+#define TIMEOUT		5000UL
+#ifndef	CONFIG_NET_RETRY_COUNT
+/* # of timeouts before giving up */
+# define TIMEOUT_COUNT	10
+#else
+# define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
+#endif
+/* Number of "loading" hashes per line (for checking the image size) */
+#define HASHES_PER_LINE	65
+
+/*
+ *	TFTP operations.
+ */
+#define TFTP_RRQ	1
+#define TFTP_WRQ	2
+#define TFTP_DATA	3
+#define TFTP_ACK	4
+#define TFTP_ERROR	5
+#define TFTP_OACK	6
+
+static ulong TftpTimeoutMSecs = TIMEOUT;
+static int TftpTimeoutCountMax = 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
+ * 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
+ * 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;
+
+enum {
+	TFTP_ERR_UNDEFINED           = 0,
+	TFTP_ERR_FILE_NOT_FOUND      = 1,
+	TFTP_ERR_ACCESS_DENIED       = 2,
+	TFTP_ERR_DISK_FULL           = 3,
+	TFTP_ERR_UNEXPECTED_OPCODE   = 4,
+	TFTP_ERR_UNKNOWN_TRANSFER_ID  = 5,
+	TFTP_ERR_FILE_ALREADY_EXISTS = 6,
+};
+
+static IPaddr_t TftpRemoteIP;
+/* The UDP port at their end */
+static int	TftpRemotePort;
+/* The UDP port at our end */
+static int	TftpOurPort;
+static int	TftpTimeoutCount;
+/* packet sequence number */
+static ulong	TftpBlock;
+/* last packet sequence number received */
+static ulong	TftpLastBlock;
+/* count of sequence number wraparounds */
+static ulong	TftpBlockWrap;
+/* memory offset due to wrapping */
+static ulong	TftpBlockWrapOffset;
+static int	TftpState;
+#ifdef CONFIG_TFTP_TSIZE
+/* The file size reported by the server */
+static int	TftpTsize;
+/* The number of hashes we printed */
+static short	TftpNumchars;
+#endif
+#ifdef CONFIG_CMD_TFTPPUT
+static int	TftpWriting;	/* 1 if writing, else 0 */
+static int	TftpFinalBlock;	/* 1 if we have sent the last block */
+#else
+#define TftpWriting	0
+#endif
+
+#define STATE_SEND_RRQ	1
+#define STATE_DATA	2
+#define STATE_TOO_LARGE	3
+#define STATE_BAD_MAGIC	4
+#define STATE_OACK	5
+#define STATE_RECV_WRQ	6
+#define STATE_SEND_WRQ	7
+
+/* default TFTP block size */
+#define TFTP_BLOCK_SIZE		512
+/* sequence number is 16 bit */
+#define TFTP_SEQUENCE_SIZE	((ulong)(1<<16))
+
+#define DEFAULT_NAME_LEN	(8 + 4 + 1)
+static char default_filename[DEFAULT_NAME_LEN];
+
+#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
+#define MAX_LEN 128
+#else
+#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
+#endif
+
+static char tftp_filename[MAX_LEN];
+
+/* 512 is poor choice for ethernet, MTU is typically 1500.
+ * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
+ * almost-MTU block sizes.  At least try... fall back to 512 if need be.
+ * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
+ */
+#ifdef CONFIG_TFTP_BLOCKSIZE
+#define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
+#else
+#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 inline void
+store_block(int block, uchar *src, unsigned len)
+{
+	ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
+	ulong newsize = offset + len;
+#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
+	int i, rc = 0;
+
+	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+		/* start address in flash? */
+		if (flash_info[i].flash_id == FLASH_UNKNOWN)
+			continue;
+		if (load_addr + offset >= 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);
+		if (rc) {
+			flash_perror(rc);
+			net_set_state(NETLOOP_FAIL);
+			return;
+		}
+	} 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);
+#endif
+
+	if (NetBootFileXferSize < newsize)
+		NetBootFileXferSize = newsize;
+}
+
+/* Clear our state ready for a new transfer */
+static void new_transfer(void)
+{
+	TftpLastBlock = 0;
+	TftpBlockWrap = 0;
+	TftpBlockWrapOffset = 0;
+#ifdef CONFIG_CMD_TFTPPUT
+	TftpFinalBlock = 0;
+#endif
+}
+
+#ifdef CONFIG_CMD_TFTPPUT
+/**
+ * Load the next block from memory to be sent over tftp.
+ *
+ * @param block	Block number to send
+ * @param dst	Destination buffer for data
+ * @param len	Number of bytes in block (this one and every other)
+ * @return number of bytes loaded
+ */
+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 tosend = len;
+
+	tosend = min(NetBootFileXferSize - 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);
+	return tosend;
+}
+#endif
+
+static void TftpSend(void);
+static void TftpTimeout(void);
+
+/**********************************************************************/
+
+static void show_block_marker(void)
+{
+#ifdef CONFIG_TFTP_TSIZE
+	if (TftpTsize) {
+		ulong pos = TftpBlock * TftpBlkSize + TftpBlockWrapOffset;
+
+		while (TftpNumchars < pos * 50 / TftpTsize) {
+			putc('#');
+			TftpNumchars++;
+		}
+	} else
+#endif
+	{
+		if (((TftpBlock - 1) % 10) == 0)
+			putc('#');
+		else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0)
+			puts("\n\t ");
+	}
+}
+
+/**
+ * restart the current transfer due to an error
+ *
+ * @param msg	Message to print for user
+ */
+static void restart(const char *msg)
+{
+	printf("\n%s; starting again\n", msg);
+#ifdef CONFIG_MCAST_TFTP
+	mcast_cleanup();
+#endif
+	NetStartAgain();
+}
+
+/*
+ * Check if the block number has wrapped, and update progress
+ *
+ * TODO: The egregious use of global variables in this file should be tidied.
+ */
+static void update_block_number(void)
+{
+	/*
+	 * RFC1350 specifies that the first data packet will
+	 * have sequence number 1. If we receive a sequence
+	 * 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 */
+	} else {
+		show_block_marker();
+	}
+}
+
+/* The TFTP get or put is complete */
+static void tftp_complete(void)
+{
+#ifdef CONFIG_TFTP_TSIZE
+	/* Print hash marks for the last packet received */
+	while (TftpTsize && TftpNumchars < 49) {
+		putc('#');
+		TftpNumchars++;
+	}
+#endif
+	time_start = get_timer(time_start);
+	if (time_start > 0) {
+		puts("\n\t ");	/* Line up with "Loading: " */
+		print_size(NetBootFileXferSize /
+			time_start * 1000, "/s");
+	}
+	puts("\ndone\n");
+	net_set_state(NETLOOP_SUCCESS);
+}
+
+static void
+TftpSend(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;
+
+	switch (TftpState) {
+	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 :
+			TFTP_WRQ);
+#else
+		*s++ = htons(TFTP_RRQ);
+#endif
+		pkt = (uchar *)s;
+		strcpy((char *)pkt, tftp_filename);
+		pkt += strlen(tftp_filename) + 1;
+		strcpy((char *)pkt, "octet");
+		pkt += 5 /*strlen("octet")*/ + 1;
+		strcpy((char *)pkt, "timeout");
+		pkt += 7 /*strlen("timeout")*/ + 1;
+		sprintf((char *)pkt, "%lu", TftpTimeoutMSecs / 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);
+#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 */
+		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);
+		pkt = (uchar *)(s + 2);
+#ifdef CONFIG_CMD_TFTPPUT
+		if (TftpWriting) {
+			int toload = TftpBlkSize;
+			int loaded = load_block(TftpBlock, pkt, toload);
+
+			s[0] = htons(TFTP_DATA);
+			pkt += loaded;
+			TftpFinalBlock = (loaded < toload);
+		}
+#endif
+		len = pkt - xp;
+		break;
+
+	case STATE_TOO_LARGE:
+		xp = pkt;
+		s = (ushort *)pkt;
+		*s++ = htons(TFTP_ERROR);
+			*s++ = htons(3);
+
+		pkt = (uchar *)s;
+		strcpy((char *)pkt, "File too large");
+		pkt += 14 /*strlen("File too large")*/ + 1;
+		len = pkt - xp;
+		break;
+
+	case STATE_BAD_MAGIC:
+		xp = pkt;
+		s = (ushort *)pkt;
+		*s++ = htons(TFTP_ERROR);
+		*s++ = htons(2);
+		pkt = (uchar *)s;
+		strcpy((char *)pkt, "File has bad magic");
+		pkt += 18 /*strlen("File has bad magic")*/ + 1;
+		len = pkt - xp;
+		break;
+	}
+
+	NetSendUDPPacket(NetServerEther, TftpRemoteIP, TftpRemotePort,
+			 TftpOurPort, len);
+}
+
+#ifdef CONFIG_CMD_TFTPPUT
+static void icmp_handler(unsigned type, unsigned code, unsigned dest,
+			 IPaddr_t 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 */
+		restart("TFTP server died");
+	}
+}
+#endif
+
+static void
+TftpHandler(uchar *pkt, unsigned dest, IPaddr_t 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
+			return;
+	}
+	if (TftpState != STATE_SEND_RRQ && src != TftpRemotePort &&
+	    TftpState != STATE_RECV_WRQ && TftpState != STATE_SEND_WRQ)
+		return;
+
+	if (len < 2)
+		return;
+	len -= 2;
+	/* warning: don't use increment (++) in ntohs() macros!! */
+	s = (__be16 *)pkt;
+	proto = *s++;
+	pkt = (uchar *)s;
+	switch (ntohs(proto)) {
+
+	case TFTP_RRQ:
+		break;
+
+	case TFTP_ACK:
+#ifdef CONFIG_CMD_TFTPPUT
+		if (TftpWriting) {
+			if (TftpFinalBlock) {
+				tftp_complete();
+			} else {
+				/*
+				 * Move to the next block. We want our block
+				 * count to wrap just like the other end!
+				 */
+				int block = ntohs(*s);
+				int ack_ok = (TftpBlock == block);
+
+				TftpBlock = (unsigned short)(block + 1);
+				update_block_number();
+				if (ack_ok)
+					TftpSend(); /* Send next data block */
+			}
+		}
+#endif
+		break;
+
+	default:
+		break;
+
+#ifdef CONFIG_CMD_TFTPSRV
+	case TFTP_WRQ:
+		debug("Got WRQ\n");
+		TftpRemoteIP = sip;
+		TftpRemotePort = src;
+		TftpOurPort = 1024 + (get_timer(0) % 3072);
+		new_transfer();
+		TftpSend(); /* 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;
+		/*
+		 * 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);
+				debug("Blocksize ack: %s, %d\n",
+					(char *)pkt+i+8, TftpBlkSize);
+			}
+#ifdef CONFIG_TFTP_TSIZE
+			if (strcmp((char *)pkt+i, "tsize") == 0) {
+				TftpTsize = simple_strtoul((char *)pkt+i+6,
+							   NULL, 10);
+				debug("size = %s, %d\n",
+					 (char *)pkt+i+6, TftpTsize);
+			}
+#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) {
+			/* Get ready to send the first block */
+			TftpState = STATE_DATA;
+			TftpBlock++;
+		}
+#endif
+		TftpSend(); /* Send ACK or first data block */
+		break;
+	case TFTP_DATA:
+		if (len < 2)
+			return;
+		len -= 2;
+		TftpBlock = ntohs(*(__be16 *)pkt);
+
+		update_block_number();
+
+		if (TftpState == STATE_SEND_RRQ)
+			debug("Server did not acknowledge timeout option!\n");
+
+		if (TftpState == STATE_SEND_RRQ || TftpState == STATE_OACK ||
+		    TftpState == STATE_RECV_WRQ) {
+			/* first block received */
+			TftpState = STATE_DATA;
+			TftpRemotePort = 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();
+				break;
+			}
+		}
+
+		if (TftpBlock == TftpLastBlock) {
+			/*
+			 *	Same block again; ignore it.
+			 */
+			break;
+		}
+
+		TftpLastBlock = TftpBlock;
+		TftpTimeoutCountMax = TIMEOUT_COUNT;
+		NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+
+		store_block(TftpBlock - 1, pkt + 2, len);
+
+		/*
+		 *	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_complete();
+		break;
+
+	case TFTP_ERROR:
+		printf("\nTFTP error: '%s' (%d)\n",
+		       pkt + 2, ntohs(*(__be16 *)pkt));
+
+		switch (ntohs(*(__be16 *)pkt)) {
+		case TFTP_ERR_FILE_NOT_FOUND:
+		case TFTP_ERR_ACCESS_DENIED:
+			puts("Not retrying...\n");
+			eth_halt();
+			net_set_state(NETLOOP_FAIL);
+			break;
+		case TFTP_ERR_UNDEFINED:
+		case TFTP_ERR_DISK_FULL:
+		case TFTP_ERR_UNEXPECTED_OPCODE:
+		case TFTP_ERR_UNKNOWN_TRANSFER_ID:
+		case TFTP_ERR_FILE_ALREADY_EXISTS:
+		default:
+			puts("Starting again\n\n");
+#ifdef CONFIG_MCAST_TFTP
+			mcast_cleanup();
+#endif
+			NetStartAgain();
+			break;
+		}
+		break;
+	}
+}
+
+
+static void
+TftpTimeout(void)
+{
+	if (++TftpTimeoutCount > TftpTimeoutCountMax) {
+		restart("Retry count exceeded");
+	} else {
+		puts("T ");
+		NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+		if (TftpState != STATE_RECV_WRQ)
+			TftpSend();
+	}
+}
+
+
+void TftpStart(enum proto_t protocol)
+{
+	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");
+	if (ep != NULL)
+		TftpBlkSizeOption = simple_strtol(ep, NULL, 10);
+
+	ep = getenv("tftptimeout");
+	if (ep != NULL)
+		TftpTimeoutMSecs = simple_strtol(ep, NULL, 10);
+
+	if (TftpTimeoutMSecs < 1000) {
+		printf("TFTP timeout (%ld ms) too low, "
+			"set minimum = 1000 ms\n",
+			TftpTimeoutMSecs);
+		TftpTimeoutMSecs = 1000;
+	}
+
+	debug("TFTP blocksize = %i, timeout = %ld ms\n",
+		TftpBlkSizeOption, TftpTimeoutMSecs);
+
+	TftpRemoteIP = NetServerIP;
+	if (BootFile[0] == '\0') {
+		sprintf(default_filename, "%02X%02X%02X%02X.img",
+			NetOurIP & 0xFF,
+			(NetOurIP >>  8) & 0xFF,
+			(NetOurIP >> 16) & 0xFF,
+			(NetOurIP >> 24) & 0xFF);
+
+		strncpy(tftp_filename, default_filename, MAX_LEN);
+		tftp_filename[MAX_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;
+		}
+	}
+
+	printf("Using %s device\n", eth_get_name());
+	printf("TFTP %s server %pI4; our IP address is %pI4",
+#ifdef CONFIG_CMD_TFTPPUT
+	       protocol == TFTPPUT ? "to" : "from",
+#else
+		"from",
+#endif
+		&TftpRemoteIP, &NetOurIP);
+
+	/* 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);
+	}
+	putc('\n');
+
+	printf("Filename '%s'.", tftp_filename);
+
+	if (NetBootFileSize) {
+		printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
+		print_size(NetBootFileSize<<9, "");
+	}
+
+	putc('\n');
+#ifdef CONFIG_CMD_TFTPPUT
+	TftpWriting = (protocol == TFTPPUT);
+	if (TftpWriting) {
+		printf("Save address: 0x%lx\n", save_addr);
+		printf("Save size:    0x%lx\n", save_size);
+		NetBootFileXferSize = save_size;
+		puts("Saving: *\b");
+		TftpState = STATE_SEND_WRQ;
+		new_transfer();
+	} else
+#endif
+	{
+		printf("Load address: 0x%lx\n", load_addr);
+		puts("Loading: *\b");
+		TftpState = STATE_SEND_RRQ;
+	}
+
+	time_start = get_timer(0);
+	TftpTimeoutCountMax = TftpRRQTimeoutCountMax;
+
+	NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+	net_set_udp_handler(TftpHandler);
+#ifdef CONFIG_CMD_TFTPPUT
+	net_set_icmp_handler(icmp_handler);
+#endif
+	TftpRemotePort = WELL_KNOWN_PORT;
+	TftpTimeoutCount = 0;
+	/* Use a pseudo-random port unless a specific port is set */
+	TftpOurPort = 1024 + (get_timer(0) % 3072);
+
+#ifdef CONFIG_TFTP_PORT
+	ep = getenv("tftpdstp");
+	if (ep != NULL)
+		TftpRemotePort = simple_strtol(ep, NULL, 10);
+	ep = getenv("tftpsrcp");
+	if (ep != NULL)
+		TftpOurPort = simple_strtol(ep, NULL, 10);
+#endif
+	TftpBlock = 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
+#ifdef CONFIG_TFTP_TSIZE
+	TftpTsize = 0;
+	TftpNumchars = 0;
+#endif
+
+	TftpSend();
+}
+
+#ifdef CONFIG_CMD_TFTPSRV
+void
+TftpStartServer(void)
+{
+	tftp_filename[0] = 0;
+
+	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);
+
+	puts("Loading: *\b");
+
+	TftpTimeoutCountMax = TIMEOUT_COUNT;
+	TftpTimeoutCount = 0;
+	TftpTimeoutMSecs = TIMEOUT;
+	NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
+
+	/* Revert TftpBlkSize to dflt */
+	TftpBlkSize = TFTP_BLOCK_SIZE;
+	TftpBlock = 0;
+	TftpOurPort = WELL_KNOWN_PORT;
+
+#ifdef CONFIG_TFTP_TSIZE
+	TftpTsize = 0;
+	TftpNumchars = 0;
+#endif
+
+	TftpState = STATE_RECV_WRQ;
+	net_set_udp_handler(TftpHandler);
+
+	/* zero out server ether in case the server ip has changed */
+	memset(NetServerEther, 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 */