84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* dtls -- a very basic DTLS implementation
|
|
*
|
|
* Copyright (C) 2011--2014 Olaf Bergmann <bergmann@tzi.org>
|
|
*
|
|
* 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 "dtls_config.h"
|
|
#include "session.h"
|
|
|
|
#ifdef HAVE_ASSERT_H
|
|
#include <assert.h>
|
|
#else
|
|
#ifndef assert
|
|
#warning "assertions are disabled"
|
|
# define assert(x)
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef WITH_CONTIKI
|
|
#define _dtls_address_equals_impl(A,B) \
|
|
((A)->size == (B)->size \
|
|
&& (A)->addr.port == (B)->addr.port \
|
|
&& uip_ipaddr_cmp(&((A)->addr.ipaddr),&((B)->addr.ipaddr)) \
|
|
&& (A)->ifindex == (B)->ifindex)
|
|
|
|
#else /* WITH_CONTIKI */
|
|
|
|
static inline int
|
|
_dtls_address_equals_impl(const session_t *a,
|
|
const session_t *b) {
|
|
if (a->ifindex != b->ifindex ||
|
|
a->size != b->size || a->addr.sa.sa_family != b->addr.sa.sa_family)
|
|
return 0;
|
|
|
|
/* need to compare only relevant parts of sockaddr_in6 */
|
|
switch (a->addr.sa.sa_family) {
|
|
case AF_INET:
|
|
return
|
|
a->addr.sin.sin_port == b->addr.sin.sin_port &&
|
|
memcmp(&a->addr.sin.sin_addr, &b->addr.sin.sin_addr,
|
|
sizeof(struct in_addr)) == 0;
|
|
case AF_INET6:
|
|
return a->addr.sin6.sin6_port == b->addr.sin6.sin6_port &&
|
|
memcmp(&a->addr.sin6.sin6_addr, &b->addr.sin6.sin6_addr,
|
|
sizeof(struct in6_addr)) == 0;
|
|
default: /* fall through and signal error */
|
|
;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* WITH_CONTIKI */
|
|
|
|
void
|
|
dtls_session_init(session_t *sess) {
|
|
assert(sess);
|
|
memset(sess, 0, sizeof(session_t));
|
|
sess->size = sizeof(sess->addr);
|
|
}
|
|
|
|
int
|
|
dtls_session_equals(const session_t *a, const session_t *b) {
|
|
assert(a); assert(b);
|
|
return _dtls_address_equals_impl(a, b);
|
|
}
|