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/*
This file is part of GNUnet
(C) 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file hello/gnunet-hello.c
* @brief change HELLO files to never expire
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_hello_lib.h"
/**
* Closure for 'add_to_buf'.
*/
struct AddContext
{
/**
* Where to add.
*/
char *buf;
/**
* Maximum number of bytes left
*/
size_t max;
/**
* Number of bytes added so far.
*/
size_t ret;
};
/**
* Add the given address with infinit expiration to the buffer.
*
* @param cls closure
* @param address address to add
* @param expiration old expiration
* @return GNUNET_OK keep iterating
*/
static int
add_to_buf (void *cls, const struct GNUNET_HELLO_Address *address,
struct GNUNET_TIME_Absolute expiration)
{
struct AddContext *ac = cls;
size_t ret;
ret = GNUNET_HELLO_add_address (address,
GNUNET_TIME_UNIT_FOREVER_ABS,
ac->buf,
ac->max);
ac->buf += ret;
ac->max -= ret;
ac->ret += ret;
return GNUNET_OK;
}
/**
* Add addresses from the address list to the HELLO.
*
* @param cls the HELLO with the addresses to add
* @param max maximum space available
* @param buf where to add the addresses
* @return number of bytes added, 0 to terminate
*/
static size_t
add_from_hello (void *cls, size_t max, void *buf)
{
struct GNUNET_HELLO_Message **orig = cls;
struct AddContext ac;
if (NULL == *orig)
return 0; /* already done */
ac.buf = buf;
ac.max = max;
ac.ret = 0;
GNUNET_assert (NULL ==
GNUNET_HELLO_iterate_addresses (*orig,
GNUNET_NO, &add_to_buf,
&ac));
*orig = NULL;
return ac.ret;
}
int
main (int argc, char *argv[])
{
struct GNUNET_DISK_FileHandle *fh;
struct GNUNET_HELLO_Message *orig;
struct GNUNET_HELLO_Message *result;
struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
uint64_t fsize;
GNUNET_log_setup ("gnunet-hello", "INFO", NULL);
if (argc != 2)
{
FPRINTF (stderr,
"%s",
_("Call with name of HELLO file to modify.\n"));
return 1;
}
if (GNUNET_OK != GNUNET_DISK_file_size (argv[1], &fsize, GNUNET_YES, GNUNET_YES))
{
FPRINTF (stderr,
_("Error accessing file `%s': %s\n"),
argv[1],
STRERROR (errno));
return 1;
}
if (fsize > 65536)
{
FPRINTF (stderr,
_("File `%s' is too big to be a HELLO\n"),
argv[1]);
return 1;
}
if (fsize < sizeof (struct GNUNET_MessageHeader))
{
FPRINTF (stderr,
_("File `%s' is too small to be a HELLO\n"),
argv[1]);
return 1;
}
fh = GNUNET_DISK_file_open (argv[1],
GNUNET_DISK_OPEN_READ,
GNUNET_DISK_PERM_USER_READ);
if (NULL == fh)
{
FPRINTF (stderr,
_("Error opening file `%s': %s\n"),
argv[1],
STRERROR (errno));
return 1;
}
{
char buf[fsize] GNUNET_ALIGN;
GNUNET_assert (fsize ==
GNUNET_DISK_file_read (fh, buf, fsize));
GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
orig = (struct GNUNET_HELLO_Message *) buf;
if ( (fsize != GNUNET_HELLO_size (orig)) ||
(GNUNET_OK != GNUNET_HELLO_get_key (orig, &pk)) )
{
FPRINTF (stderr,
_("Did not find well-formed HELLO in file `%s'\n"),
argv[1]);
return 1;
}
result = GNUNET_HELLO_create (&pk, &add_from_hello, &orig);
GNUNET_assert (NULL != result);
fh = GNUNET_DISK_file_open (argv[1],
GNUNET_DISK_OPEN_WRITE,
GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
if (NULL == fh)
{
FPRINTF (stderr,
_("Error opening file `%s': %s\n"),
argv[1],
STRERROR (errno));
GNUNET_free (result);
return 1;
}
fsize = GNUNET_HELLO_size (result);
if (fsize != GNUNET_DISK_file_write (fh,
result,
fsize))
{
FPRINTF (stderr,
_("Error writing HELLO to file `%s': %s\n"),
argv[1],
STRERROR (errno));
(void) GNUNET_DISK_file_close (fh);
return 1;
}
GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
}
return 0;
}
/* end of gnunet-hello.c */
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