diff options
Diffstat (limited to 'third_party/srtp/crypto/include/rdbx.h')
| -rw-r--r-- | third_party/srtp/crypto/include/rdbx.h | 86 |
1 files changed, 81 insertions, 5 deletions
diff --git a/third_party/srtp/crypto/include/rdbx.h b/third_party/srtp/crypto/include/rdbx.h index ce9ecf6f..4b8dd229 100644 --- a/third_party/srtp/crypto/include/rdbx.h +++ b/third_party/srtp/crypto/include/rdbx.h @@ -8,6 +8,42 @@ * */ +/* + * + * 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. + * + */ + #ifndef RDBX_H #define RDBX_H @@ -46,19 +82,29 @@ typedef uint64_t xtd_seq_num_t; typedef struct { xtd_seq_num_t index; - v128_t bitmask; + bitvector_t bitmask; } rdbx_t; /* - * rdbx_init(rdbx_ptr) + * rdbx_init(rdbx_ptr, ws) * - * initializes the rdbx pointed to by its argument, setting the - * rollover counter and sequence number to zero + * initializes the rdbx pointed to by its argument with the window size ws, + * setting the rollover counter and sequence number to zero */ err_status_t -rdbx_init(rdbx_t *rdbx); +rdbx_init(rdbx_t *rdbx, unsigned long ws); + + +/* + * rdbx_dealloc(rdbx_ptr) + * + * frees memory associated with the rdbx + */ + +err_status_t +rdbx_dealloc(rdbx_t *rdbx); /* @@ -100,12 +146,42 @@ rdbx_check(const rdbx_t *rdbx, int difference); err_status_t rdbx_add_index(rdbx_t *rdbx, int delta); + +/* + * rdbx_set_roc(rdbx, roc) initalizes the rdbx_t at the location rdbx + * to have the rollover counter value roc. If that value is less than + * the current rollover counter value, then the function returns + * err_status_replay_old; otherwise, err_status_ok is returned. + * + */ + +err_status_t +rdbx_set_roc(rdbx_t *rdbx, uint32_t roc); + +/* + * rdbx_get_roc(rdbx) returns the value of the rollover counter for + * the rdbx_t pointed to by rdbx + * + */ + +xtd_seq_num_t +rdbx_get_packet_index(const rdbx_t *rdbx); + /* * xtd_seq_num_t functions - these are *internal* functions of rdbx, and * shouldn't be used to manipulate rdbx internal values. use the rdbx * api instead! */ +/* + * rdbx_get_ws(rdbx_ptr) + * + * gets the window size which was used to initialize the rdbx + */ + +unsigned long +rdbx_get_window_size(const rdbx_t *rdbx); + /* index_init(&pi) initializes a packet index pi (sets it to zero) */ |