Diff: peer.c

Revision:

0:ff9ebe0cf0e9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/peer.c	Fri Oct 18 13:18:30 2013 +0000
@@ -0,0 +1,100 @@
+/* dtls -- a very basic DTLS implementation
+ *
+ * Copyright (C) 2011--2013 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 "peer.h"
+#include "debug.h"
+
+#define __DEBUG__ 0
+#ifndef __MODULE__
+#define __MODULE__ "peer.c"
+#endif
+
+#include "dbg.h"
+
+#ifndef WITH_CONTIKI
+void peer_init()
+{
+}
+
+static inline dtls_peer_t *
+dtls_malloc_peer() {
+  return (dtls_peer_t *)malloc(sizeof(dtls_peer_t));
+}
+
+void
+dtls_free_peer(dtls_peer_t *peer) {
+  dtls_cipher_free(peer->security_params.read_cipher);
+  dtls_cipher_free(peer->security_params.write_cipher);
+
+  free(peer);
+}
+#else /* WITH_CONTIKI */
+
+#include "memb.h"
+MEMB(peer_storage, dtls_peer_t, DTLS_PEER_MAX);
+
+void
+peer_init() {
+  memb_init(&peer_storage);
+}
+
+static inline dtls_peer_t *
+dtls_malloc_peer() {
+  return memb_alloc(&peer_storage);
+}
+
+void
+dtls_free_peer(dtls_peer_t *peer) {
+  dtls_cipher_free(peer->security_params.read_cipher);
+  dtls_cipher_free(peer->security_params.write_cipher);
+
+  memb_free(&peer_storage, peer);
+}
+#endif /* WITH_CONTIKI */
+
+dtls_peer_t *
+dtls_new_peer(const session_t *session) {
+  dtls_peer_t *peer;
+
+  peer = dtls_malloc_peer();
+  if (peer) {
+    memset(peer, 0, sizeof(dtls_peer_t));
+    memcpy(&peer->session, session, sizeof(session_t));
+
+    dtls_dsrv_log_addr(LOG_DEBUG, "dtls_new_peer", session);
+    /* initially allow the NULL cipher */
+    peer->security_params.cipher = TLS_NULL_WITH_NULL_NULL;
+    peer->security_params.compression = TLS_COMPRESSION_NULL;
+
+    /* initialize the handshake hash wrt. the hard-coded DTLS version */
+    DBG("DTLSv12: initialize HASH_SHA256");
+    /* TLS 1.2:  PRF(secret, label, seed) = P_<hash>(secret, label + seed) */
+    /* FIXME: we use the default SHA256 here, might need to support other 
+              hash functions as well */
+    dtls_hash_init(&peer->hs_state.hs_hash);
+  }
+  
+  return peer;
+}