5e4dfe0d21
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@889 42af7a65-404d-4744-a932-0658087f49c3
319 lines
9.8 KiB
C
319 lines
9.8 KiB
C
/****************************************************************************
|
|
* netuils/tftp/tftpc_get.c
|
|
*
|
|
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, TFTP_DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <net/uip/uipopt.h>
|
|
#include <net/uip/uip.h>
|
|
#include <net/uip/tftp.h>
|
|
|
|
#include "tftpc_internal.h"
|
|
|
|
#if defined(CONFIG_NET) && defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
|
|
|
|
/****************************************************************************
|
|
* Definitions
|
|
****************************************************************************/
|
|
|
|
#define TFTP_RETRIES 3
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: tftp_write
|
|
****************************************************************************/
|
|
|
|
static inline ssize_t tftp_write(int fd, const ubyte *buf, size_t len)
|
|
{
|
|
size_t left = len;
|
|
ssize_t nbyteswritten;
|
|
|
|
while (left > 0)
|
|
{
|
|
/* Write the data... repeating the write in the event that it was
|
|
* interrupted by a signal.
|
|
*/
|
|
|
|
do
|
|
{
|
|
nbyteswritten = write(fd, buf, left);
|
|
}
|
|
while (nbyteswritten < 0 && errno == EINTR);
|
|
|
|
/* Check for non-EINTR errors */
|
|
|
|
if (nbyteswritten < 0)
|
|
{
|
|
ndbg("write failed: %d\n", errno);
|
|
return ERROR;
|
|
}
|
|
|
|
/* Handle partial writes */
|
|
|
|
left -= nbyteswritten;
|
|
buf += nbyteswritten;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: tftp_parsedatapacket
|
|
****************************************************************************/
|
|
|
|
static inline int tftp_parsedatapacket(const ubyte *packet,
|
|
uint16 *opcode, uint16 *blockno)
|
|
{
|
|
*opcode = (uint16)packet[0] << 8 | (uint16)packet[1];
|
|
if (*opcode == TFTP_DATA)
|
|
{
|
|
*blockno = (uint16)packet[2] << 8 | (uint16)packet[3];
|
|
return OK;
|
|
}
|
|
#if defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_NET)
|
|
else if (*opcode == TFTP_ERR)
|
|
{
|
|
(void)tftp_parseerrpacket(packet);
|
|
}
|
|
#endif
|
|
return ERROR;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: tftpget
|
|
*
|
|
* Input Parameters:
|
|
* remote - The name of the file on the TFTP server.
|
|
* local - Path to the location on a mounted filesystem where the file
|
|
* will be stored.
|
|
* addr - The IP address of the server in network order
|
|
* binary - TRUE: Perform binary ('octect') transfer
|
|
* FALSE: Perform text ('netascii') transfer
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tftpget(const char *remote, const char *local, in_addr_t addr, boolean binary)
|
|
{
|
|
struct sockaddr_in server; /* The address of the TFTP server */
|
|
struct sockaddr_in from; /* The address the last UDP message recv'd from */
|
|
ubyte *packet; /* Allocated memory to hold one packet */
|
|
uint16 blockno = 0; /* The current transfer block number */
|
|
uint16 opcode; /* Received opcode */
|
|
uint16 rblockno; /* Received block number */
|
|
int len; /* Generic length */
|
|
int sd; /* Socket descriptor for socket I/O */
|
|
int fd; /* File descriptor for file I/O */
|
|
int retry; /* Retry counter */
|
|
int nbytesrecvd; /* The number of bytes received in the packet */
|
|
int ndatabytes; /* The number of data bytes received */
|
|
int result = ERROR; /* Assume failure */
|
|
int ret; /* Generic return status */
|
|
|
|
/* Allocate the buffer to used for socket/disk I/O */
|
|
|
|
packet = (ubyte*)zalloc(TFTP_IOBUFSIZE);
|
|
if (!packet)
|
|
{
|
|
ndbg("packet memory allocation failure\n");
|
|
errno = ENOMEM;
|
|
goto errout;
|
|
}
|
|
|
|
/* Open the file for writing */
|
|
|
|
fd = open(local, O_WRONLY|O_CREAT|O_TRUNC, 0666);
|
|
if (fd < 0)
|
|
{
|
|
ndbg("open failed: %d\n", errno);
|
|
goto errout_with_packet;
|
|
}
|
|
|
|
/* Initialize a UDP socket and setup the server addresss */
|
|
|
|
sd = tftp_sockinit(&server, addr);
|
|
if (sd < 0)
|
|
{
|
|
goto errout_with_fd;
|
|
}
|
|
|
|
/* Send the read request using the well-known port number */
|
|
|
|
len = tftp_mkreqpacket(packet, TFTP_RRQ, remote, binary);
|
|
ret = tftp_sendto(sd, packet, len, &server);
|
|
if (ret != len)
|
|
{
|
|
goto errout_with_sd;
|
|
}
|
|
|
|
/* Subsequent sendto will use the port number selected by the TFTP
|
|
* server. Setting the server port to zero indicates that we have
|
|
* not yet received the server port number.
|
|
*/
|
|
|
|
server.sin_port = 0;
|
|
|
|
/* Then enter the transfer loop. Loop until the entire file has
|
|
* been received or until an error occurs.
|
|
*/
|
|
|
|
do
|
|
{
|
|
/* Increment the TFTP block number for the next transfer */
|
|
|
|
blockno++;
|
|
|
|
/* Send the next block if the file within a loop. We will
|
|
* retry up to TFTP_RETRIES times before giving up on the
|
|
* transfer.
|
|
*/
|
|
|
|
for (retry = 0; retry < TFTP_RETRIES; retry++)
|
|
{
|
|
/* Get the next packet from the server */
|
|
|
|
nbytesrecvd = tftp_recvfrom(sd, packet, TFTP_IOBUFSIZE, &from);
|
|
|
|
/* Check if anything valid was received */
|
|
|
|
if (nbytesrecvd >= 0)
|
|
{
|
|
/* Verify the sender address and port number */
|
|
|
|
if (server.sin_addr.s_addr != from.sin_addr.s_addr)
|
|
{
|
|
nvdbg("Invalid address in DATA\n");
|
|
retry--;
|
|
continue;
|
|
}
|
|
|
|
if (server.sin_port && server.sin_port != from.sin_port)
|
|
{
|
|
nvdbg("Invalid port in DATA\n");
|
|
len = tftp_mkerrpacket(packet, TFTP_ERR_UNKID, TFTP_ERRST_UNKID);
|
|
ret = tftp_sendto(sd, packet, len, &from);
|
|
retry--;
|
|
continue;
|
|
}
|
|
|
|
/* Parse the incoming DATA packet */
|
|
|
|
if (nbytesrecvd < TFTP_DATAHEADERSIZE ||
|
|
tftp_parsedatapacket(packet, &opcode, &rblockno) != OK ||
|
|
blockno != rblockno)
|
|
{
|
|
nvdbg("Parse failure\n");
|
|
if (opcode > TFTP_MAXRFC1350)
|
|
{
|
|
len = tftp_mkerrpacket(packet, TFTP_ERR_ILLEGALOP, TFTP_ERRST_ILLEGALOP);
|
|
ret = tftp_sendto(sd, packet, len, &from);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Replace the server port to the one in the good data response */
|
|
|
|
if (!server.sin_port)
|
|
{
|
|
server.sin_port = from.sin_port;
|
|
}
|
|
|
|
/* Then break out of the loop */
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Did we exhaust all of the retries? */
|
|
|
|
if (retry == TFTP_RETRIES)
|
|
{
|
|
nvdbg("Retry limit exceeded\n");
|
|
goto errout_with_sd;
|
|
}
|
|
|
|
/* Write the received data chunk to the file */
|
|
|
|
ndatabytes = nbytesrecvd - TFTP_DATAHEADERSIZE;
|
|
if (tftp_write(fd, packet + TFTP_DATAHEADERSIZE, ndatabytes) < 0)
|
|
{
|
|
goto errout_with_sd;
|
|
}
|
|
|
|
/* Send the acknowledgment */
|
|
|
|
len = tftp_mkackpacket(packet, blockno);
|
|
ret = tftp_sendto(sd, packet, len, &server);
|
|
if (ret != len)
|
|
{
|
|
goto errout_with_sd;
|
|
}
|
|
nvdbg("ACK blockno %d\n", blockno);
|
|
}
|
|
while (ndatabytes >= TFTP_DATASIZE);
|
|
|
|
/* Return success */
|
|
|
|
result = OK;
|
|
|
|
errout_with_sd:
|
|
close(sd);
|
|
errout_with_fd:
|
|
close(fd);
|
|
errout_with_packet:
|
|
free(packet);
|
|
errout:
|
|
return result;
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_UDP && CONFIG_NFILE_DESCRIPTORS > 0 */
|