blob: 59a8ebb3cf339b3c40ff24846c13406e5dc0b9a4 [file] [log] [blame]
/*
* 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;
/*
* 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) {
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
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)
{
ushort proto;
ushort *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 = (ushort *)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(*(ushort *)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(*(ushort *)pkt));
switch (ntohs(*(ushort *)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;
}
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);
}
#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 */