Ashley Mills / tinydtls_0_4_0

mbed port of tinydtls

peer.c@1:bc8a649bad13, 2013-10-11 (annotated)

Committer:
ashleymills
Date:
Fri Oct 11 08:46:21 2013 +0000
Revision:
1:bc8a649bad13
Parent:
0:04990d454f45 
Cleaned up all the debug stuff I added finding the hash table bug.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ashleymills 0:04990d454f45 1 /* dtls -- a very basic DTLS implementation
ashleymills 0:04990d454f45 2 *
ashleymills 0:04990d454f45 3 * Copyright (C) 2011--2013 Olaf Bergmann <bergmann@tzi.org>
ashleymills 0:04990d454f45 4 *
ashleymills 0:04990d454f45 5 * Permission is hereby granted, free of charge, to any person
ashleymills 0:04990d454f45 6 * obtaining a copy of this software and associated documentation
ashleymills 0:04990d454f45 7 * files (the "Software"), to deal in the Software without
ashleymills 0:04990d454f45 8 * restriction, including without limitation the rights to use, copy,
ashleymills 0:04990d454f45 9 * modify, merge, publish, distribute, sublicense, and/or sell copies
ashleymills 0:04990d454f45 10 * of the Software, and to permit persons to whom the Software is
ashleymills 0:04990d454f45 11 * furnished to do so, subject to the following conditions:
ashleymills 0:04990d454f45 12 *
ashleymills 0:04990d454f45 13 * The above copyright notice and this permission notice shall be
ashleymills 0:04990d454f45 14 * included in all copies or substantial portions of the Software.
ashleymills 0:04990d454f45 15 *
ashleymills 0:04990d454f45 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
ashleymills 0:04990d454f45 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
ashleymills 0:04990d454f45 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
ashleymills 0:04990d454f45 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
ashleymills 0:04990d454f45 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ashleymills 0:04990d454f45 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
ashleymills 0:04990d454f45 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
ashleymills 0:04990d454f45 23 * SOFTWARE.
ashleymills 0:04990d454f45 24 */
ashleymills 0:04990d454f45 25
ashleymills 0:04990d454f45 26 #define __DEBUG__ 4
ashleymills 0:04990d454f45 27
ashleymills 0:04990d454f45 28 #ifndef __MODULE__
ashleymills 0:04990d454f45 29 #define __MODULE__ "peer.c"
ashleymills 0:04990d454f45 30 #endif
ashleymills 0:04990d454f45 31
ashleymills 0:04990d454f45 32 #include "peer.h"
ashleymills 0:04990d454f45 33 #include "debug.h"
ashleymills 0:04990d454f45 34 #include "dbg.h"
ashleymills 0:04990d454f45 35
ashleymills 0:04990d454f45 36 #ifndef NDEBUG
ashleymills 0:04990d454f45 37 #include <stdio.h>
ashleymills 0:04990d454f45 38
ashleymills 0:04990d454f45 39 extern size_t dsrv_print_addr(const session_t *addr, unsigned char *buf,
ashleymills 0:04990d454f45 40 size_t len);
ashleymills 0:04990d454f45 41 #endif /* NDEBUG */
ashleymills 0:04990d454f45 42
ashleymills 0:04990d454f45 43 #ifndef WITH_CONTIKI
ashleymills 0:04990d454f45 44 void peer_init()
ashleymills 0:04990d454f45 45 {
ashleymills 0:04990d454f45 46 }
ashleymills 0:04990d454f45 47
ashleymills 0:04990d454f45 48 static inline dtls_peer_t *
ashleymills 0:04990d454f45 49 dtls_malloc_peer() {
ashleymills 0:04990d454f45 50 return (dtls_peer_t *)malloc(sizeof(dtls_peer_t));
ashleymills 0:04990d454f45 51 }
ashleymills 0:04990d454f45 52
ashleymills 0:04990d454f45 53 void
ashleymills 0:04990d454f45 54 dtls_free_peer(dtls_peer_t *peer) {
ashleymills 0:04990d454f45 55 free(peer);
ashleymills 0:04990d454f45 56 }
ashleymills 0:04990d454f45 57 #else /* WITH_CONTIKI */
ashleymills 0:04990d454f45 58 PROCESS(dtls_retransmit_process, "DTLS retransmit process");
ashleymills 0:04990d454f45 59
ashleymills 0:04990d454f45 60 #include "memb.h"
ashleymills 0:04990d454f45 61 MEMB(peer_storage, dtls_peer_t, DTLS_PEER_MAX);
ashleymills 0:04990d454f45 62
ashleymills 0:04990d454f45 63 void
ashleymills 0:04990d454f45 64 peer_init() {
ashleymills 0:04990d454f45 65 memb_init(&peer_storage);
ashleymills 0:04990d454f45 66 }
ashleymills 0:04990d454f45 67
ashleymills 0:04990d454f45 68 static inline dtls_peer_t *
ashleymills 0:04990d454f45 69 dtls_malloc_peer() {
ashleymills 0:04990d454f45 70 return memb_alloc(&peer_storage);
ashleymills 0:04990d454f45 71 }
ashleymills 0:04990d454f45 72
ashleymills 0:04990d454f45 73 void
ashleymills 0:04990d454f45 74 dtls_free_peer(dtls_peer_t *peer) {
ashleymills 0:04990d454f45 75 memb_free(&peer_storage, peer);
ashleymills 0:04990d454f45 76 }
ashleymills 0:04990d454f45 77 #endif /* WITH_CONTIKI */
ashleymills 0:04990d454f45 78
ashleymills 0:04990d454f45 79 dtls_peer_t *
ashleymills 0:04990d454f45 80 dtls_new_peer(const session_t *session) {
ashleymills 0:04990d454f45 81 DBG("Entered dtls_new_peer");
ashleymills 0:04990d454f45 82 dtls_peer_t *peer;
ashleymills 0:04990d454f45 83
ashleymills 0:04990d454f45 84 peer = dtls_malloc_peer();
ashleymills 0:04990d454f45 85 if (peer) {
ashleymills 0:04990d454f45 86 memset(peer, 0, sizeof(dtls_peer_t));
ashleymills 0:04990d454f45 87 memcpy(&peer->session, session, sizeof(session_t));
ashleymills 0:04990d454f45 88
ashleymills 0:04990d454f45 89 #ifndef NDEBUG
ashleymills 0:04990d454f45 90 if (dtls_get_log_level() >= LOG_DEBUG) {
ashleymills 0:04990d454f45 91 unsigned char addrbuf[72];
ashleymills 0:04990d454f45 92 dsrv_print_addr(session, addrbuf, sizeof(addrbuf));
ashleymills 0:04990d454f45 93 DBG("Created peer for: \"%s\"", addrbuf);
ashleymills 0:04990d454f45 94 }
ashleymills 0:04990d454f45 95 #endif
ashleymills 0:04990d454f45 96 /* initially allow the NULL cipher */
ashleymills 0:04990d454f45 97 CURRENT_CONFIG(peer)->cipher = TLS_NULL_WITH_NULL_NULL;
ashleymills 0:04990d454f45 98
ashleymills 0:04990d454f45 99 /* initialize the handshake hash wrt. the hard-coded DTLS version */
ashleymills 0:04990d454f45 100 DBG("DTLSv12: initialize HASH_SHA256");
ashleymills 0:04990d454f45 101 /* TLS 1.2: PRF(secret, label, seed) = P_<hash>(secret, label + seed) */
ashleymills 0:04990d454f45 102 /* FIXME: we use the default SHA256 here, might need to support other
ashleymills 0:04990d454f45 103 hash functions as well */
ashleymills 0:04990d454f45 104 dtls_hash_init(&peer->hs_state.hs_hash);
ashleymills 0:04990d454f45 105 }
ashleymills 0:04990d454f45 106 DBG("New peer created @ %u",peer);
ashleymills 0:04990d454f45 107
ashleymills 0:04990d454f45 108 return peer;
ashleymills 0:04990d454f45 109 }
ashleymills 0:04990d454f45 110