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/*
This file is part of GNUnet.
(C) 2009 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/address.c
* @brief helper functions for handling addresses
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_hello_lib.h"
#include "gnunet_util_lib.h"
/**
* Allocate an address struct.
*
* @param peer the peer
* @param transport_name plugin name
* @param address binary address
* @param address_length number of bytes in 'address'
* @return the address struct
*/
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_allocate (const struct GNUNET_PeerIdentity *peer,
const char *transport_name, const void *address,
size_t address_length)
{
struct GNUNET_HELLO_Address *addr;
size_t slen;
char *end;
GNUNET_assert (transport_name != NULL);
slen = strlen (transport_name) + 1;
addr =
GNUNET_malloc (sizeof (struct GNUNET_HELLO_Address) + address_length +
slen);
addr->peer = *peer;
addr->address = &addr[1];
end = (char *) &addr[1];
memcpy (end, address, address_length);
addr->address_length = address_length;
addr->transport_name = &end[address_length];
memcpy (&end[address_length], transport_name, slen);
return addr;
}
/**
* Get the size of an address struct.
*
* @param address address
* @return the size
*/
size_t
GNUNET_HELLO_address_get_size (const struct GNUNET_HELLO_Address * address)
{
return sizeof (struct GNUNET_HELLO_Address) + address->address_length +
strlen (address->transport_name) + 1;
}
/**
* Copy an address struct.
*
* @param address address to copy
* @return a copy of the address struct
*/
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_copy (const struct GNUNET_HELLO_Address *address)
{
return GNUNET_HELLO_address_allocate (&address->peer, address->transport_name,
address->address,
address->address_length);
}
/**
* Compare two addresses. Does NOT compare the peer identity,
* that is assumed already to match!
*
* @param a1 first address
* @param a2 second address
* @return 0 if the addresses are equal, -1 if a1<a2, 1 if a1>a2.
*/
int
GNUNET_HELLO_address_cmp (const struct GNUNET_HELLO_Address *a1,
const struct GNUNET_HELLO_Address *a2)
{
int ret;
ret = strcmp (a1->transport_name, a2->transport_name);
if (0 != ret)
return ret;
if (a1->address_length < a2->address_length)
return -1;
if (a1->address_length > a2->address_length)
return 1;
return memcmp (a1->address, a2->address, a1->address_length);
}
/* end of address.c */
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