-int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap)
-{
- int cmp;
- unsigned int shift;
- const unsigned char *seq = s->rlayer.read_sequence;
-
- cmp = satsub64be(seq, bitmap->max_seq_num);
- if (cmp > 0) {
- SSL3_RECORD_set_seq_num(&s->rlayer.rrec, seq);
- return 1; /* this record in new */
- }
- shift = -cmp;
- if (shift >= sizeof(bitmap->map) * 8)
- return 0; /* stale, outside the window */
- else if (bitmap->map & (1UL << shift))
- return 0; /* record previously received */
-
- SSL3_RECORD_set_seq_num(&s->rlayer.rrec, seq);
- return 1;
-}
-
-void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap)
-{
- int cmp;
- unsigned int shift;
- const unsigned char *seq = s->rlayer.read_sequence;
-
- cmp = satsub64be(seq, bitmap->max_seq_num);
- if (cmp > 0) {
- shift = cmp;
- if (shift < sizeof(bitmap->map) * 8)
- bitmap->map <<= shift, bitmap->map |= 1UL;
- else
- bitmap->map = 1UL;
- memcpy(bitmap->max_seq_num, seq, 8);
- } else {
- shift = -cmp;
- if (shift < sizeof(bitmap->map) * 8)
- bitmap->map |= 1UL << shift;
- }
-}
-