| /* 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); |
| } |