srtp/crypto/replay/rdbx.c - Issue 889083003: Update libsrtp to upstream 1.5.0

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Side by Side Diff: srtp/crypto/replay/rdbx.c

Issue 889083003: Update libsrtp to upstream 1.5.0 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libsrtp@master

Patch Set: Updated to libsrtp 1.5.1 Created 5 years, 10 months ago

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1 /*	1 /*

2 * rdbx.c	2 * rdbx.c

3 *	3 *

4 * a replay database with extended range, using a rollover counter	4 * a replay database with extended range, using a rollover counter

5 *	5 *

6 * David A. McGrew	6 * David A. McGrew

7 * Cisco Systems, Inc.	7 * Cisco Systems, Inc.

8 */	8 */

9	9

10 /*	10 /*

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36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES	36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR	37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)	38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,	39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)	40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

42 * OF THE POSSIBILITY OF SUCH DAMAGE.	42 * OF THE POSSIBILITY OF SUCH DAMAGE.

43 *	43 *

44 */	44 */

45	45

	46 #ifdef HAVE_CONFIG_H

	47 #include <config.h>

	48 #endif

	49

46 #include "rdbx.h"	50 #include "rdbx.h"

47	51

48	52

49 /*	53 /*

50 * from RFC 3711:	54 * from RFC 3711:

51 *	55 *

52 * A receiver reconstructs the index i of a packet with sequence	56 * A receiver reconstructs the index i of a packet with sequence

53 * number SEQ using the estimate	57 * number SEQ using the estimate

54 *	58 *

55 * i = 2^16 * v + SEQ,	59 * i = 2^16 * v + SEQ,

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343 #else	347 #else

344 *guess = s;	348 *guess = s;

345 #endif	349 #endif

346	350

347 #ifdef NO_64BIT_MATH	351 #ifdef NO_64BIT_MATH

348 return s - (uint16_t) low32(rdbx->index);	352 return s - (uint16_t) low32(rdbx->index);

349 #else	353 #else

350 return s - (uint16_t) rdbx->index;	354 return s - (uint16_t) rdbx->index;

351 #endif	355 #endif

352 }	356 }

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