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/*
This file is part of GNUnet.
Copyright (C) 2009 GNUnet e.V.
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 of the License,
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
Affero General Public License for more details.
*/
/**
* @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"
/**
* Check if an address has a local option set
*
* @param address the address to check
* @param option the respective option to check for
* @return #GNUNET_YES or #GNUNET_NO
*/
int
GNUNET_HELLO_address_check_option (const struct GNUNET_HELLO_Address * address,
enum GNUNET_HELLO_AddressInfo option)
{
if (option == (address->local_info & option))
return GNUNET_YES;
return GNUNET_NO;
}
/**
* 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;
}
/**
* 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'
* @param local_info additional local information for the 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,
enum GNUNET_HELLO_AddressInfo local_info)
{
struct GNUNET_HELLO_Address *addr;
size_t slen;
char *end;
slen = strlen (transport_name) + 1;
addr = GNUNET_malloc (sizeof (struct GNUNET_HELLO_Address) +
address_length + slen);
addr->peer = *peer;
addr->address = &addr[1];
addr->address_length = address_length;
addr->local_info = local_info;
end = (char *) &addr[1];
addr->transport_name = &end[address_length];
GNUNET_memcpy (end,
address,
address_length);
GNUNET_memcpy (&end[address_length],
transport_name,
slen);
return addr;
}
/**
* 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)
{
if (NULL == address)
return NULL;
return GNUNET_HELLO_address_allocate (&address->peer,
address->transport_name,
address->address,
address->address_length,
address->local_info);
}
/**
* 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;
if ( (NULL == a1) &&
(NULL == a2) )
return 0;
if (NULL == a1)
return 1;
if (NULL == a2)
return -1;
ret = strcmp (a1->transport_name, a2->transport_name);
if (0 != ret)
return ret;
if (a1->local_info != a2->local_info)
return (((int) a1->local_info) < ((int) a2->local_info)) ? -1 : 1;
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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