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group.c
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group.c
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/* dtls -- basic DTLS implementation with adaptation for group communication
*
* Copyright (C) 2015 Kirill Nikitin <kirilln@kth.se>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "group.h"
#include "debug.h"
/**
* Initialization related to group communication.
* First part is to work with memory for group structure,
* the second is for group sender structure,
* the third is for group listener structure.
*/
/**
* GROUP Functions
*/
#ifndef WITH_CONTIKI
void group_init()
{
}
static inline dtls_group_t *
dtls_malloc_group() {
return (dtls_group_t *)malloc(sizeof(dtls_group_t));
}
void
dtls_free_group(dtls_group_t *group) {
dtls_cipher_free(group->security_params.read_cipher);
dtls_cipher_free(group->security_params.write_cipher);
free(group);
}
#else /* WITH_CONTIKI */
MEMB(group_storage, dtls_group_t, DTLS_GROUP_MAX);
void
group_init() {
memb_init(&group_storage);
}
static dtls_group_t *
dtls_malloc_group() {
return memb_alloc(&group_storage);
}
void
dtls_free_group(dtls_group_t *group) {
dtls_cipher_free(group->security_params.read_cipher);
dtls_cipher_free(group->security_params.write_cipher);
memb_free(&group_storage, group);
}
#endif /* WITH_CONTIKI */
dtls_group_t *
dtls_new_group(const session_t *session) {
dtls_group_t *group;
group = dtls_malloc_group();
if (group) {
memset(group, 0, sizeof(dtls_group_t));
memcpy(&group->session, session, sizeof(session_t));
#ifdef WITH_CONTIKI
LIST_STRUCT_INIT(group, senders);
#ifdef WITH_GROUP_RESPONSE
LIST_STRUCT_INIT(group, listeners);
#endif // WITH_GROUP_RESPONSE
#endif // WITH_CONTIKI
dtls_dsrv_log_addr(LOG_DEBUG, "dtls_new_group", session);
/* initially allow the NULL cipher */
group->security_params.cipher = TLS_NULL_WITH_NULL_NULL;
group->security_params.compression = TLS_COMPRESSION_NULL;
}
else
{
debug("ERROR: Insufficient memory to create new group\r\n");
}
return group;
}
/**
* GROUP SENDER Functions
*/
#ifndef WITH_CONTIKI
void group_sender_init()
{
}
static inline dtls_group_sender_t *
dtls_malloc_group_sender() {
return (dtls_group_sender_t *)malloc(sizeof(dtls_group_sender_t));
}
void
dtls_free_group_sender(dtls_group_sender_t *sender) {
free(sender);
}
#else /* WITH_CONTIKI */
MEMB(group_sender_storage, dtls_group_sender_t, DTLS_SENDER_MAX);
void
group_sender_init() {
memb_init(&group_sender_storage);
}
static dtls_group_sender_t *
dtls_malloc_group_sender() {
return memb_alloc(&group_sender_storage);
}
void
dtls_free_group_sender(dtls_group_sender_t *sender) {
memb_free(&group_sender_storage, sender);
}
#endif /* WITH_CONTIKI */
dtls_group_sender_t *
dtls_new_group_sender(const session_t *session, const uint8 id) {
dtls_group_sender_t *sender;
sender = dtls_malloc_group_sender();
if (sender) {
memset(sender, 0, sizeof(dtls_group_sender_t));
memcpy(&sender->sess, session, sizeof(session_t));
sender->epoch[1] = 0;
sender->id = id;
sender->mul_rseq[4] = 0;
}
else
{
debug("ERROR: Insufficient memory to create new group sender\r\n");
}
return sender;
}
#ifdef WITH_GROUP_RESPONSE
/**
* GROUP LISTENER Functions
*/
#ifndef WITH_CONTIKI
void group_listener_init()
{
}
static dtls_group_listener_t *
dtls_malloc_group_listener() {
return (dtls_group_listener_t *)malloc(sizeof(dtls_group_listener_t));
}
void
dtls_free_group_listener(dtls_group_listener_t *listener) {
free(listener);
}
#else /* WITH_CONTIKI */
MEMB(group_listener_storage, dtls_group_listener_t, DTLS_LISTENER_MAX);
void
group_listener_init() {
memb_init(&group_listener_storage);
}
static dtls_group_listener_t *
dtls_malloc_group_listener() {
return memb_alloc(&group_listener_storage);
}
void
dtls_free_group_listener(dtls_group_listener_t *listener) {
memb_free(&group_listener_storage, listener);
}
#endif /* WITH_CONTIKI */
dtls_group_listener_t *
dtls_new_group_listener(const session_t *session) {
dtls_group_listener_t *listener;
listener = dtls_malloc_group_listener();
if (listener) {
memset(listener, 0, sizeof(dtls_group_listener_t));
memcpy(&listener->sess, session, sizeof(session_t));
listener->epoch[1] = 0;
listener->mul_rseq[4] = 0;
}
else
{
debug("ERROR: Insufficient memory to create new group listener\r\n");
}
return listener;
}
#endif // WITH_GROUP_RESPONSE