Update libsrtp to version 2.0

srtp/crypto/replay/rdb.c

Index: srtp/crypto/replay/rdb.c
diff --git a/srtp/crypto/replay/rdb.c b/srtp/crypto/replay/rdb.c
deleted file mode 100644
index c84222fd0600bce5153ae71340029315efea3fd5..0000000000000000000000000000000000000000
--- a/srtp/crypto/replay/rdb.c
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * rdb.c
- *
- * Implements a replay database for packet security
- *
- * David A. McGrew
- * Cisco Systems, Inc.
- */
-
-/*
- *	
- * Copyright (c) 2001-2006, Cisco Systems, Inc.
- * All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 
- *   Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- *   Redistributions in binary form must reproduce the above
- *   copyright notice, this list of conditions and the following
- *   disclaimer in the documentation and/or other materials provided
- *   with the distribution.
- * 
- *   Neither the name of the Cisco Systems, Inc. nor the names of its
- *   contributors may be used to endorse or promote products derived
- *   from this software without specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#include "rdb.h"
-
-
-/*
- * this implementation of a replay database works as follows:
- * 
- * window_start is the index of the first packet in the window
- * bitmask      a bit-buffer, containing the most recently entered
- *              index as the leftmost bit 
- *
- */
-
-/* rdb_init initalizes rdb */
-
-err_status_t
-rdb_init(rdb_t *rdb) {
-  v128_set_to_zero(&rdb->bitmask);
-  rdb->window_start = 0;
-  return err_status_ok;
-}
-
-/*
- * rdb_check checks to see if index appears in rdb
- */
-
-err_status_t
-rdb_check(const rdb_t *rdb, uint32_t p_index) {
-  
-  /* if the index appears after (or at very end of) the window, its good */
-  if (p_index >= rdb->window_start + rdb_bits_in_bitmask)
-    return err_status_ok;
-  
-  /* if the index appears before the window, its bad */
-  if (p_index < rdb->window_start)
-    return err_status_replay_old;
-
-  /* otherwise, the index appears within the window, so check the bitmask */
-  if (v128_get_bit(&rdb->bitmask, (p_index - rdb->window_start)) == 1)
-    return err_status_replay_fail;    
-      
-  /* otherwise, the index is okay */
-  return err_status_ok;
-}
-
-/*
- * rdb_add_index adds index to rdb_t (and does *not* check if
- * index appears in db)
- *
- * this function should be called only after rdb_check has
- * indicated that the index does not appear in the rdb, e.g., a mutex
- * should protect the rdb between these calls
- */
-
-err_status_t
-rdb_add_index(rdb_t *rdb, uint32_t p_index) {
-  int delta;  
-
-  /* here we *assume* that p_index > rdb->window_start */
-
-  delta = (p_index - rdb->window_start);    
-  if (delta < rdb_bits_in_bitmask) {
-
-    /* if the p_index is within the window, set the appropriate bit */
-    v128_set_bit(&rdb->bitmask, delta);
-
-  } else { 
-    
-    delta -= rdb_bits_in_bitmask - 1;
-
-    /* shift the window forward by delta bits*/
-    v128_left_shift(&rdb->bitmask, delta);
-    v128_set_bit(&rdb->bitmask, rdb_bits_in_bitmask-1);
-    rdb->window_start += delta;
-
-  }    
-
-  return err_status_ok;
-}
-
-err_status_t
-rdb_increment(rdb_t *rdb) {
-
-  if (rdb->window_start++ > 0x7fffffff)
-    return err_status_key_expired;
-  return err_status_ok;
-}
-
-uint32_t
-rdb_get_value(const rdb_t *rdb) {
-  return rdb->window_start;
-}