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/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
*
* transport session ID helper functions.
*
* Copyright (c) 2006-2009 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <impl/framework.h>
//#define TSI_DEBUG
/* locals */
/* re-entrant form of pgm_tsi_print()
*
* returns number of bytes written to buffer on success, returns -1 on
* invalid parameters.
*/
int
pgm_tsi_print_r (
const pgm_tsi_t* restrict tsi,
char* restrict buf,
size_t bufsize
)
{
pgm_return_val_if_fail (NULL != tsi, -1);
pgm_return_val_if_fail (NULL != buf, -1);
pgm_return_val_if_fail (bufsize > 0, -1);
const uint8_t* gsi = (const uint8_t*)tsi;
const uint16_t source_port = tsi->sport;
return snprintf (buf, bufsize, "%i.%i.%i.%i.%i.%i.%i",
gsi[0], gsi[1], gsi[2], gsi[3], gsi[4], gsi[5], ntohs (source_port));
}
/* transform TSI to ASCII string form.
*
* on success, returns pointer to ASCII string. on error, returns NULL.
*/
char*
pgm_tsi_print (
const pgm_tsi_t* tsi
)
{
pgm_return_val_if_fail (tsi != NULL, NULL);
static char buf[PGM_TSISTRLEN];
pgm_tsi_print_r (tsi, buf, sizeof(buf));
return buf;
}
/* create hash value of TSI for use with GLib hash tables.
*
* on success, returns a hash value corresponding to the TSI. on error, fails
* on assert.
*/
pgm_hash_t
pgm_tsi_hash (
const void* p
)
{
const union {
pgm_tsi_t tsi;
uint32_t l[2];
} *u = p;
/* pre-conditions */
pgm_assert (NULL != p);
return u->l[0] ^ u->l[1];
}
/* compare two transport session identifier TSI values.
*
* returns TRUE if they are equal, FALSE if they are not.
*/
bool
pgm_tsi_equal (
const void* restrict p1,
const void* restrict p2
)
{
const union {
pgm_tsi_t tsi;
uint32_t l[2];
uint64_t ll;
} *restrict u1 = p1, *restrict u2 = p2;
/* pre-conditions */
pgm_assert (NULL != p1);
pgm_assert (NULL != p2);
return (u1->l[0] == u2->l[0] && u1->l[1] == u2->l[1]);
}
/* eof */
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