From: Matt Caswell Date: Tue, 3 Feb 2015 15:39:06 +0000 (+0000) Subject: Move bitmap and next_bitmap from s->d1 to s->rlayer.d. X-Git-Tag: OpenSSL_1_1_0-pre1~1402 X-Git-Url: https://git.openssl.org/gitweb/?a=commitdiff_plain;h=91f93f69ef59bbe9ad8d191eed5a88b2125fba26;p=openssl.git Move bitmap and next_bitmap from s->d1 to s->rlayer.d. Create dtls_bitmap.h and dtls_bitmap.c Reviewed-by: Richard Levitte --- diff --git a/ssl/Makefile b/ssl/Makefile index a2fb87dbfd..ae644bc6c4 100644 --- a/ssl/Makefile +++ b/ssl/Makefile @@ -31,7 +31,7 @@ LIBSRC= \ ssl_ciph.c ssl_stat.c ssl_rsa.c \ ssl_asn1.c ssl_txt.c ssl_algs.c ssl_conf.c \ bio_ssl.c ssl_err.c kssl.c t1_reneg.c tls_srp.c t1_trce.c ssl_utst.c \ - record/ssl3_buffer.c record/ssl3_record.c + record/ssl3_buffer.c record/ssl3_record.c record/dtls1_bitmap.c LIBOBJ= \ s3_meth.o s3_srvr.o s3_clnt.o s3_lib.o s3_enc.o record/s3_pkt.o s3_both.o s3_cbc.o \ s3_msg.o \ @@ -43,7 +43,7 @@ LIBOBJ= \ ssl_ciph.o ssl_stat.o ssl_rsa.o \ ssl_asn1.o ssl_txt.o ssl_algs.o ssl_conf.o \ bio_ssl.o ssl_err.o kssl.o t1_reneg.o tls_srp.o t1_trce.o ssl_utst.o \ - record/ssl3_buffer.o record/ssl3_record.o + record/ssl3_buffer.o record/ssl3_record.o record/dtls1_bitmap.o SRC= $(LIBSRC) diff --git a/ssl/record/d1_pkt.c b/ssl/record/d1_pkt.c index 2550b1dc7d..a9947ffbf5 100644 --- a/ssl/record/d1_pkt.c +++ b/ssl/record/d1_pkt.c @@ -151,65 +151,6 @@ void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl) memset(d, 0, sizeof *d); } -/* mod 128 saturating subtract of two 64-bit values in big-endian order */ -static int satsub64be(const unsigned char *v1, const unsigned char *v2) -{ - int ret, sat, brw, i; - - if (sizeof(long) == 8) - do { - const union { - long one; - char little; - } is_endian = { - 1 - }; - long l; - - if (is_endian.little) - break; - /* not reached on little-endians */ - /* - * following test is redundant, because input is always aligned, - * but I take no chances... - */ - if (((size_t)v1 | (size_t)v2) & 0x7) - break; - - l = *((long *)v1); - l -= *((long *)v2); - if (l > 128) - return 128; - else if (l < -128) - return -128; - else - return (int)l; - } while (0); - - ret = (int)v1[7] - (int)v2[7]; - sat = 0; - brw = ret >> 8; /* brw is either 0 or -1 */ - if (ret & 0x80) { - for (i = 6; i >= 0; i--) { - brw += (int)v1[i] - (int)v2[i]; - sat |= ~brw; - brw >>= 8; - } - } else { - for (i = 6; i >= 0; i--) { - brw += (int)v1[i] - (int)v2[i]; - sat |= brw; - brw >>= 8; - } - } - brw <<= 8; /* brw is either 0 or -256 */ - - if (sat & 0xff) - return brw | 0x80; - else - return brw + (ret & 0xFF); -} - static int have_handshake_fragment(SSL *s, int type, unsigned char *buf, int len, int peek); @@ -1252,48 +1193,6 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf, return -1; } -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; - } -} - DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch) { @@ -1302,13 +1201,13 @@ DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, /* In current epoch, accept HM, CCS, DATA, & ALERT */ if (rr->epoch == s->rlayer.d->r_epoch) - return &s->d1->bitmap; + return &s->rlayer.d->bitmap; /* Only HM and ALERT messages can be from the next epoch */ else if (rr->epoch == (unsigned long)(s->rlayer.d->r_epoch + 1) && (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) { *is_next_epoch = 1; - return &s->d1->next_bitmap; + return &s->rlayer.d->next_bitmap; } return NULL; @@ -1322,8 +1221,8 @@ void dtls1_reset_seq_numbers(SSL *s, int rw) if (rw & SSL3_CC_READ) { seq = s->rlayer.read_sequence; s->rlayer.d->r_epoch++; - memcpy(&(s->d1->bitmap), &(s->d1->next_bitmap), sizeof(DTLS1_BITMAP)); - memset(&(s->d1->next_bitmap), 0x00, sizeof(DTLS1_BITMAP)); + memcpy(&(s->rlayer.d->bitmap), &(s->rlayer.d->next_bitmap), sizeof(DTLS1_BITMAP)); + memset(&(s->rlayer.d->next_bitmap), 0x00, sizeof(DTLS1_BITMAP)); } else { seq = s->rlayer.write_sequence; memcpy(s->d1->last_write_sequence, seq, diff --git a/ssl/record/dtls1_bitmap.c b/ssl/record/dtls1_bitmap.c new file mode 100644 index 0000000000..174ba4990c --- /dev/null +++ b/ssl/record/dtls1_bitmap.c @@ -0,0 +1,217 @@ +/* ssl/record/dtls1_bitmap.c */ +/* + * DTLS implementation written by Nagendra Modadugu + * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. + */ +/* ==================================================================== + * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include "../ssl_locl.h" + +/* mod 128 saturating subtract of two 64-bit values in big-endian order */ +static int satsub64be(const unsigned char *v1, const unsigned char *v2) +{ + int ret, sat, brw, i; + + if (sizeof(long) == 8) + do { + const union { + long one; + char little; + } is_endian = { + 1 + }; + long l; + + if (is_endian.little) + break; + /* not reached on little-endians */ + /* + * following test is redundant, because input is always aligned, + * but I take no chances... + */ + if (((size_t)v1 | (size_t)v2) & 0x7) + break; + + l = *((long *)v1); + l -= *((long *)v2); + if (l > 128) + return 128; + else if (l < -128) + return -128; + else + return (int)l; + } while (0); + + ret = (int)v1[7] - (int)v2[7]; + sat = 0; + brw = ret >> 8; /* brw is either 0 or -1 */ + if (ret & 0x80) { + for (i = 6; i >= 0; i--) { + brw += (int)v1[i] - (int)v2[i]; + sat |= ~brw; + brw >>= 8; + } + } else { + for (i = 6; i >= 0; i--) { + brw += (int)v1[i] - (int)v2[i]; + sat |= brw; + brw >>= 8; + } + } + brw <<= 8; /* brw is either 0 or -256 */ + + if (sat & 0xff) + return brw | 0x80; + else + return brw + (ret & 0xFF); +} + +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(RECORD_LAYER_get_rrec(&s->rlayer), 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(RECORD_LAYER_get_rrec(&s->rlayer), seq); + return 1; +} + +void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap) +{ + int cmp; + unsigned int shift; + const unsigned char *seq = RECORD_LAYER_get_read_sequence(&s->rlayer); + + 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; + } +} diff --git a/ssl/record/dtls1_bitmap.h b/ssl/record/dtls1_bitmap.h new file mode 100644 index 0000000000..f90970928a --- /dev/null +++ b/ssl/record/dtls1_bitmap.h @@ -0,0 +1,122 @@ +/* ssl/record/dtls1_bitmap.h */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ +/* ==================================================================== + * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + + +typedef struct dtls1_bitmap_st { + unsigned long map; /* track 32 packets on 32-bit systems and 64 + * - on 64-bit systems */ + + unsigned char max_seq_num[8]; /* max record number seen so far, 64-bit + * value in big-endian encoding */ +} DTLS1_BITMAP; + +int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap); +void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap); diff --git a/ssl/record/rec_layer.h b/ssl/record/rec_layer.h index 00abf24f8f..4830318c65 100644 --- a/ssl/record/rec_layer.h +++ b/ssl/record/rec_layer.h @@ -119,14 +119,6 @@ * * *****************************************************************************/ -typedef struct dtls1_bitmap_st { - unsigned long map; /* track 32 packets on 32-bit systems and 64 - * - on 64-bit systems */ - unsigned char max_seq_num[8]; /* max record number seen so far, 64-bit - * value in big-endian encoding */ -} DTLS1_BITMAP; - - typedef struct record_pqueue_st { unsigned short epoch; pqueue q; @@ -150,6 +142,11 @@ typedef struct dtls_record_layer_st { */ unsigned short r_epoch; unsigned short w_epoch; + + /* records being received in the current epoch */ + DTLS1_BITMAP bitmap; + /* renegotiation starts a new set of sequence numbers */ + DTLS1_BITMAP next_bitmap; } DTLS_RECORD_LAYER; typedef struct record_layer_st { @@ -267,8 +264,6 @@ void dtls1_reset_seq_numbers(SSL *s, int rw); __owur int ssl3_read_n(SSL *s, int n, int max, int extend); __owur int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, unsigned int len); -int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap); -void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap); DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch); int dtls1_process_buffered_records(SSL *s); diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h index 2368a09fe4..0b267faf96 100644 --- a/ssl/ssl_locl.h +++ b/ssl/ssl_locl.h @@ -165,6 +165,7 @@ # include # include +#include "record/dtls1_bitmap.h" #include "record/ssl3_buffer.h" #include "record/ssl3_record.h" #include "record/rec_layer.h" @@ -1404,10 +1405,6 @@ typedef struct dtls1_state_st { unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH]; unsigned int cookie_len; - /* records being received in the current epoch */ - DTLS1_BITMAP bitmap; - /* renegotiation starts a new set of sequence numbers */ - DTLS1_BITMAP next_bitmap; /* handshake message numbers */ unsigned short handshake_write_seq; unsigned short next_handshake_write_seq;