/*
* 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 <display_options.h>
#include <efi_loader.h>
#include <env.h>
#include <image.h>
#include <lmb.h>
#include <log.h>
#include <mapmem.h>
#include <net.h>
#include <net6.h>
#include <asm/global_data.h>
#include <net/tftp.h>
#include "bootp.h"
DECLARE_GLOBAL_DATA_PTR;
/* Well known TFTP port # */
#define WELL_KNOWN_PORT 69
/* Millisecs to timeout for lost pkt */
#define TIMEOUT 5000UL
/* 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 timeout_ms = TIMEOUT;
static int timeout_count_max = (CONFIG_NET_RETRY_COUNT * 2);
static ulong time_start; /* Record time we started tftp */
static struct in6_addr tftp_remote_ip6;
/*
* These globals govern the timeout behavior when attempting a connection to a
* TFTP server. tftp_timeout_ms specifies the number of milliseconds to
* wait for the server to respond to initial connection. Second global,
* 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 tftp_timeout_ms = TIMEOUT;
int tftp_timeout_count_max = (CONFIG_NET_RETRY_COUNT * 2);
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,
TFTP_ERR_OPTION_NEGOTIATION = 8,
};
static struct in_addr tftp_remote_ip;
/* The UDP port at their end */
static int tftp_remote_port;
/* The UDP port at our end */
static int tftp_our_port;
static int timeout_count;
/* packet sequence number */
static ulong tftp_cur_block;
/* last packet sequence number received */
static ulong tftp_prev_block;
/* count of sequence number wraparounds */
static ulong tftp_block_wrap;
/* memory offset due to wrapping */
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 tftp_tsize;
/* The number of hashes we printed */
static short tftp_tsize_num_hash;
#endif
/* The window size negotiated */
static ushort tftp_windowsize;
/* Next block to send ack to */
static ushort tftp_next_ack;
/* Last nack block we send */
static ushort tftp_last_nack;
#ifdef CONFIG_CMD_TFTPPUT
/* 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 tftp_put_active 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
#define STATE_INVALID_OPTION 8
/* default TFTP block size */
#define TFTP_BLOCK_SIZE 512
#define TFTP_MTU_BLOCKSIZE6 (CONFIG_TFTP_BLOCKSIZE - 20)
/* 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)
*/
/* When windowsize is defined to 1,
* tftp behaves the same way as it was
* never declared
*/
#ifdef CONFIG_TFTP_WINDOWSIZE
#define TFTP_WINDOWSIZE CONFIG_TFTP_WINDOWSIZE
#else
#define TFTP_WINDOWSIZE 1
#endif
static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
static unsigned short tftp_block_size_option = CONFIG_TFTP_BLOCKSIZE;
static unsigned short tftp_window_size_option = TFTP_WINDOWSIZE;
static inline int store_block(int block, uchar *src, unsigned int len)
{
ulong offset = block * tftp_block_size + tftp_block_wrap_offset -
tftp_block_size;
ulong newsize = offset + len;
ulong store_addr = tftp_load_addr + offset;
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;
return 0;
}
/* Clear our state ready for a new transfer */
static void new_transfer(void)
{
tftp_prev_block = 0;
tftp_block_wrap = 0;
tftp_block_wrap_offset = 0;
#ifdef CONFIG_CMD_TFTPPUT
tftp_put_final_block_sent = 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 = block * tftp_block_size + tftp_block_wrap_offset -
tftp_block_size;
ulong tosend = len;
tosend = min(net_boot_file_size - offset, tosend);
(void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
block, offset, len, tosend);
return tosend;
}
#endif
static void tftp_send(void);
static void tftp_timeout_handler(void);
/**********************************************************************/
static void show_block_marker(void)
{
ulong pos;
#ifdef CONFIG_TFTP_TSIZE
if (tftp_tsize) {
pos = tftp_cur_block * tftp_block_size +
tftp_block_wrap_offset;
if (pos > tftp_tsize)
pos = tftp_tsize;
while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
putc('#');
tftp_tsize_num_hash++;
}
} else
#endif
{
pos = (tftp_cur_block - 1) +
(tftp_block_wrap * TFTP_SEQUENCE_SIZE);
if ((pos % 10) == 0)
putc('#');
else if (((pos + 1) % (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);
net_start_again();
}
/*
* 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 (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 */
}
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 (tftp_tsize && tftp_tsize_num_hash < 49) {
putc('#');
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(net_boot_file_size /
time_start * 1000, "/s");
}
puts("\ndone\n");
if (IS_ENABLED(CONFIG_CMD_BOOTEFI)) {
if (!tftp_put_active)
efi_set_bootdev("Net", "", tftp_filename,
map_sysmem(tftp_load_addr, 0),
net_boot_file_size);
}
net_set_state(NETLOOP_SUCCESS);
}
static void tftp_send(void)
{
uchar *pkt;
uchar *xp;
int len = 0;
ushort *s;
bool err_pkt = false;
/*
* We will always be sending some sort of packet, so
* cobble together the packet headers now.
*/
if (IS_ENABLED(CONFIG_IPV6) && use_ip6)
pkt = net_tx_packet + net_eth_hdr_size() +
IP6_HDR_SIZE + UDP_HDR_SIZE;
else
pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
switch (tftp_state) {
case STATE_SEND_RRQ:
case STATE_SEND_WRQ:
xp = pkt;
s = (ushort *)pkt;
#ifdef CONFIG_CMD_TFTPPUT
*s++ = htons(tftp_state == 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", 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%u%c",
0, net_boot_file_size, 0);
#endif
/* try for more effic. blk size */
pkt += sprintf((char *)pkt, "blksize%c%d%c",
0, tftp_block_size_option, 0);
/* try for more effic. window size.
* Implemented only for tftp get.
* Don't bother sending if it's 1
*/
if (tftp_state == STATE_SEND_RRQ && tftp_window_size_option > 1)
pkt += sprintf((char *)pkt, "windowsize%c%d%c",
0, tftp_window_size_option, 0);
len = pkt - xp;
break;
case STATE_OACK:
case STATE_RECV_WRQ:
case STATE_DATA:
xp = pkt;
s = (ushort *)pkt;
s[0] = htons(TFTP_ACK);
s[1] = htons(tftp_cur_block);
pkt = (uchar *)(s + 2);
#ifdef CONFIG_CMD_TFTPPUT
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;
tftp_put_final_block_sent = (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;
err_pkt = true;
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;
err_pkt = true;
break;
case STATE_INVALID_OPTION:
xp = pkt;
s = (ushort *)pkt;
*s++ = htons(TFTP_ERROR);
*s++ = htons(TFTP_ERR_OPTION_NEGOTIATION);
pkt = (uchar *)s;
strcpy((char *)pkt, "Option Negotiation Failed");
/* strlen("Option Negotiation Failed") + NULL*/
pkt += 25 + 1;
len = pkt - xp;
err_pkt = true;
break;
}
if (IS_ENABLED(CONFIG_IPV6) && use_ip6)
net_send_udp_packet6(net_server_ethaddr,
&tftp_remote_ip6,
tftp_remote_port,
tftp_our_port, len);
else
net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
tftp_remote_port, tftp_our_port, len);
if (err_pkt)
net_set_state(NETLOOP_FAIL);
}
#ifdef CONFIG_CMD_TFTPPUT
static void icmp_handler(unsigned type, unsigned code, unsigned dest,
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 */
restart("TFTP server died");
}
}
#endif
static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
unsigned src, unsigned len)
{
__be16 proto;
__be16 *s;
int i;
u16 timeout_val_rcvd;
if (dest != tftp_our_port) {
return;
}
if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
tftp_state != STATE_RECV_WRQ && tftp_state != 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 (tftp_put_active) {
if (tftp_put_final_block_sent) {
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 = (tftp_cur_block == block);
tftp_prev_block = tftp_cur_block;
tftp_cur_block = (unsigned short)(block + 1);
update_block_number();
if (ack_ok)
tftp_send(); /* Send next data block */
}
}
#endif
break;
default:
break;
#ifdef CONFIG_CMD_TFTPSRV
case TFTP_WRQ:
debug("Got WRQ\n");
tftp_remote_ip = sip;
tftp_remote_port = src;
tftp_our_port = 1024 + (get_timer(0) % 3072);
new_transfer();
tftp_send(); /* Send ACK(0) */
break;
#endif
case TFTP_OACK:
debug("Got OACK: ");
for (i = 0; i < len; i++) {
if (pkt[i] == '\0')
debug(" ");
else
debug("%c", pkt[i]);
}
debug("\n");
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 (strcasecmp((char *)pkt + i, "blksize") == 0) {
tftp_block_size = (unsigned short)
dectoul((char *)pkt + i + 8, NULL);
debug("Blocksize oack: %s, %d\n",
(char *)pkt + i + 8, tftp_block_size);
if (tftp_block_size > tftp_block_size_option) {
printf("Invalid blk size(=%d)\n",
tftp_block_size);
tftp_state = STATE_INVALID_OPTION;
}
}
if (strcasecmp((char *)pkt + i, "timeout") == 0) {
timeout_val_rcvd = (unsigned short)
dectoul((char *)pkt + i + 8, NULL);
debug("Timeout oack: %s, %d\n",
(char *)pkt + i + 8, timeout_val_rcvd);
if (timeout_val_rcvd != (timeout_ms / 1000)) {
printf("Invalid timeout val(=%d s)\n",
timeout_val_rcvd);
tftp_state = STATE_INVALID_OPTION;
}
}
#ifdef CONFIG_TFTP_TSIZE
if (strcasecmp((char *)pkt + i, "tsize") == 0) {
tftp_tsize = dectoul((char *)pkt + i + 6,
NULL);
debug("size = %s, %d\n",
(char *)pkt + i + 6, tftp_tsize);
}
#endif
if (strcasecmp((char *)pkt + i, "windowsize") == 0) {
tftp_windowsize =
dectoul((char *)pkt + i + 11, NULL);
debug("windowsize = %s, %d\n",
(char *)pkt + i + 11, tftp_windowsize);
}
}
tftp_next_ack = tftp_windowsize;
#ifdef CONFIG_CMD_TFTPPUT
if (tftp_put_active && tftp_state == STATE_OACK) {
/* Get ready to send the first block */
tftp_state = STATE_DATA;
tftp_cur_block++;
}
#endif
tftp_send(); /* Send ACK or first data block */
break;
case TFTP_DATA:
if (len < 2)
return;
len -= 2;
if (ntohs(*(__be16 *)pkt) != (ushort)(tftp_cur_block + 1)) {
debug("Received unexpected block: %d, expected: %d\n",
ntohs(*(__be16 *)pkt),
(ushort)(tftp_cur_block + 1));
/*
* Only ACK if the block count received is greater than
* the expected block count, otherwise skip ACK.
* (required to properly handle the server retransmitting
* the window)
*/
if ((ushort)(tftp_cur_block + 1) - (short)(ntohs(*(__be16 *)pkt)) > 0)
break;
/*
* If one packet is dropped most likely
* all other buffers in the window
* that will arrive will cause a sending NACK.
* This just overwellms the server, let's just send one.
*/
if (tftp_last_nack != tftp_cur_block) {
tftp_send();
tftp_last_nack = tftp_cur_block;
tftp_next_ack = (ushort)(tftp_cur_block +
tftp_windowsize);
}
break;
}
tftp_cur_block++;
tftp_cur_block %= TFTP_SEQUENCE_SIZE;
if (tftp_state == STATE_SEND_RRQ) {
debug("Server did not acknowledge any options!\n");
tftp_next_ack = tftp_windowsize;
}
if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
tftp_state == STATE_RECV_WRQ) {
/* first block received */
tftp_state = STATE_DATA;
tftp_remote_port = src;
new_transfer();
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 (tftp_cur_block == tftp_prev_block) {
/* Same block again; ignore it. */
break;
}
update_block_number();
tftp_prev_block = tftp_cur_block;
timeout_count_max = tftp_timeout_count_max;
net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
if (store_block(tftp_cur_block, pkt + 2, len)) {
eth_halt();
net_set_state(NETLOOP_FAIL);
break;
}
if (len < tftp_block_size) {
tftp_send();
tftp_complete();
break;
}
/*
* Acknowledge the block just received, which will prompt
* the remote for the next one.
*/
if (tftp_cur_block == tftp_next_ack) {
tftp_send();
tftp_next_ack += tftp_windowsize;
}
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");
net_start_again();
break;
}
break;
}
}
static void tftp_timeout_handler(void)
{
if (++timeout_count > timeout_count_max) {
restart("Retry count exceeded");
} else {
puts("T ");
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 image_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, image_load_addr);
if (!max_size)
return -1;
tftp_load_size = max_size;
#endif
tftp_load_addr = image_load_addr;
return 0;
}
static int saved_tftp_block_size_option;
static void sanitize_tftp_block_size_option(enum proto_t protocol)
{
int cap, max_defrag;
switch (protocol) {
case TFTPGET:
max_defrag = config_opt_enabled(CONFIG_IP_DEFRAG, CONFIG_NET_MAXDEFRAG, 0);
if (max_defrag) {
/* Account for IP, UDP and TFTP headers. */
cap = max_defrag - (20 + 8 + 4);
/* RFC2348 sets a hard upper limit. */
cap = min(cap, 65464);
break;
}
/*
* If not CONFIG_IP_DEFRAG, cap at the same value as
* for tftp put, namely normal MTU minus protocol
* overhead.
*/
fallthrough;
case TFTPPUT:
default:
/*
* U-Boot does not support IP fragmentation on TX, so
* this must be small enough that it fits normal MTU
* (and small enough that it fits net_tx_packet which
* has room for PKTSIZE_ALIGN bytes).
*/
cap = 1468;
}
if (tftp_block_size_option > cap) {
printf("Capping tftp block size option to %d (was %d)\n",
cap, tftp_block_size_option);
saved_tftp_block_size_option = tftp_block_size_option;
tftp_block_size_option = cap;
}
}
void tftp_start(enum proto_t protocol)
{
__maybe_unused char *ep; /* Environment pointer */
if (saved_tftp_block_size_option) {
tftp_block_size_option = saved_tftp_block_size_option;
saved_tftp_block_size_option = 0;
}
if (IS_ENABLED(CONFIG_NET_TFTP_VARS)) {
/*
* Allow the user to choose TFTP blocksize and timeout.
* TFTP protocol has a minimal timeout of 1 second.
*/
ep = env_get("tftpblocksize");
if (ep != NULL)
tftp_block_size_option = simple_strtol(ep, NULL, 10);
ep = env_get("tftpwindowsize");
if (ep != NULL)
tftp_window_size_option = simple_strtol(ep, NULL, 10);
ep = env_get("tftptimeout");
if (ep != NULL)
timeout_ms = simple_strtol(ep, NULL, 10);
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)
tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
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;
}
}
sanitize_tftp_block_size_option(protocol);
debug("TFTP blocksize = %i, TFTP windowsize = %d timeout = %ld ms\n",
tftp_block_size_option, tftp_window_size_option, timeout_ms);
if (IS_ENABLED(CONFIG_IPV6))
tftp_remote_ip6 = net_server_ip6;
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",
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, DEFAULT_NAME_LEN);
tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
printf("*** Warning: no boot file name; using '%s'\n",
tftp_filename);
}
if (IS_ENABLED(CONFIG_IPV6)) {
if (use_ip6) {
char *s, *e;
size_t len;
s = strchr(net_boot_file_name, '[');
e = strchr(net_boot_file_name, ']');
len = e - s;
if (s && e) {
string_to_ip6(s + 1, len - 1, &tftp_remote_ip6);
strlcpy(tftp_filename, e + 2, MAX_LEN);
} else {
strlcpy(tftp_filename, net_boot_file_name, MAX_LEN);
tftp_filename[MAX_LEN - 1] = 0;
}
}
}
printf("Using %s device\n", eth_get_name());
if (IS_ENABLED(CONFIG_IPV6) && use_ip6) {
printf("TFTP from server %pI6c; our IP address is %pI6c",
&tftp_remote_ip6, &net_ip6);
if (tftp_block_size_option > TFTP_MTU_BLOCKSIZE6)
tftp_block_size_option = TFTP_MTU_BLOCKSIZE6;
} else {
printf("TFTP %s server %pI4; our IP address is %pI4",
#ifdef CONFIG_CMD_TFTPPUT
protocol == TFTPPUT ? "to" : "from",
#else
"from",
#endif
&tftp_remote_ip, &net_ip);
}
/* Check if we need to send across this subnet */
if (IS_ENABLED(CONFIG_IPV6) && use_ip6) {
if (!ip6_addr_in_subnet(&net_ip6, &tftp_remote_ip6,
net_prefix_length))
printf("; sending through gateway %pI6c",
&net_gateway6);
} else 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 (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
tftp_put_active = (protocol == TFTPPUT);
if (tftp_put_active) {
printf("Save address: 0x%lx\n", image_save_addr);
printf("Save size: 0x%lx\n", image_save_size);
net_boot_file_size = image_save_size;
puts("Saving: *\b");
tftp_state = STATE_SEND_WRQ;
new_transfer();
} else
#endif
{
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");
tftp_state = STATE_SEND_RRQ;
}
time_start = get_timer(0);
timeout_count_max = tftp_timeout_count_max;
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
tftp_remote_port = WELL_KNOWN_PORT;
timeout_count = 0;
/* Use a pseudo-random port unless a specific port is set */
tftp_our_port = 1024 + (get_timer(0) % 3072);
#ifdef CONFIG_TFTP_PORT
ep = env_get("tftpdstp");
if (ep != NULL)
tftp_remote_port = simple_strtol(ep, NULL, 10);
ep = env_get("tftpsrcp");
if (ep != NULL)
tftp_our_port = simple_strtol(ep, NULL, 10);
#endif
tftp_cur_block = 0;
tftp_windowsize = 1;
tftp_last_nack = 0;
/* zero out server ether in case the server ip has changed */
memset(net_server_ethaddr, 0, 6);
/* Revert tftp_block_size to dflt */
tftp_block_size = TFTP_BLOCK_SIZE;
#ifdef CONFIG_TFTP_TSIZE
tftp_tsize = 0;
tftp_tsize_num_hash = 0;
#endif
tftp_send();
}
#ifdef CONFIG_CMD_TFTPSRV
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", &net_ip);
printf("Load address: 0x%lx\n", tftp_load_addr);
puts("Loading: *\b");
timeout_count_max = tftp_timeout_count_max;
timeout_count = 0;
timeout_ms = TIMEOUT;
net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
/* Revert tftp_block_size to dflt */
tftp_block_size = TFTP_BLOCK_SIZE;
tftp_cur_block = 0;
tftp_our_port = WELL_KNOWN_PORT;
tftp_windowsize = 1;
tftp_next_ack = tftp_windowsize;
#ifdef CONFIG_TFTP_TSIZE
tftp_tsize = 0;
tftp_tsize_num_hash = 0;
#endif
tftp_state = STATE_RECV_WRQ;
net_set_udp_handler(tftp_handler);
/* zero out server ether in case the server ip has changed */
memset(net_server_ethaddr, 0, 6);
}
#endif /* CONFIG_CMD_TFTPSRV */