/src/gnutls/lib/dtls.h

Source (jump to first uncovered line)
/*
 * Copyright (C) 2009-2012 Free Software Foundation, Inc.
 *
 * Author: Jonathan Bastien-Filiatrault
 *
 * This file is part of GNUTLS.
 *
 * The GNUTLS library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>
 *
 */

#ifndef GNUTLS_LIB_DTLS_H
#define GNUTLS_LIB_DTLS_H

#include "config.h"
#include "gnutls_int.h"
#include "buffers.h"
#include "mbuffers.h"
#include "constate.h"

int _dtls_transmit(gnutls_session_t session);
int _dtls_record_check(struct record_parameters_st *rp, uint64_t seq_num);
void _dtls_reset_hsk_state(gnutls_session_t session);
void _dtls_reset_window(struct record_parameters_st *rp);

#define MAX_DTLS_TIMEOUT 60000

#define RETURN_DTLS_EAGAIN_OR_TIMEOUT(session, r)                            \
  {                                                                    \
    struct timespec _now;                                        \
    unsigned int _diff;                                          \
    gnutls_gettime(&_now);                                       \
                                                                             \
    _diff = timespec_sub_ms(                                     \
      &_now, &session->internals.handshake_start_time);    \
    if (_diff > session->internals.handshake_timeout_ms) {       \
      _gnutls_dtls_log("Session timeout: %u ms\n", _diff); \
      return gnutls_assert_val(GNUTLS_E_TIMEDOUT);         \
    } else {                                                     \
      int _rr;                                             \
      if (r != GNUTLS_E_INTERRUPTED)                       \
        _rr = GNUTLS_E_AGAIN;                        \
      else                                                 \
        _rr = r;                                     \
      if (!(session->internals.flags & GNUTLS_NONBLOCK))   \
        millisleep(50);                              \
      return gnutls_assert_val(_rr);                       \
    }                                                            \
  }

int _dtls_wait_and_retransmit(gnutls_session_t session);

/* returns true or false depending on whether we need to
 * handle asynchronously handshake data.
 */
inline static int _dtls_is_async(gnutls_session_t session)
{
  if ((session->security_parameters.entity == GNUTLS_SERVER &&
       !session->internals.resumed) ||
      (session->security_parameters.entity == GNUTLS_CLIENT &&
       session->internals.resumed))
    return 1;
  else
    return 0;
}

inline static void _dtls_async_timer_init(gnutls_session_t session)
{
  if (_dtls_is_async(session)) {
    _gnutls_dtls_log(
      "DTLS[%p]: Initializing timer for handshake state.\n",
      session);
    session->internals.dtls.async_term =
      gnutls_time(0) + MAX_DTLS_TIMEOUT / 1000;
  } else {
    _dtls_reset_hsk_state(session);
    _gnutls_handshake_io_buffer_clear(session);
    _gnutls_epoch_gc(session);
    session->internals.dtls.async_term = 0;
  }
}

void _dtls_async_timer_delete(gnutls_session_t session);

/* Checks whether it is time to terminate the timer
 */
inline static void _dtls_async_timer_check(gnutls_session_t session)
{
  if (!IS_DTLS(session))
    return;

  if (session->internals.dtls.async_term != 0) {
    time_t _now = time(0);

    /* check if we need to expire the queued handshake data */
    if (_now > session->internals.dtls.async_term) {
      _dtls_async_timer_delete(session);
    }
  }
}

unsigned _gnutls_record_overhead(const version_entry_st *ver,
         const cipher_entry_st *cipher,
         const mac_entry_st *mac, unsigned max);

/* Returns non-zero if the async timer is active */
inline static int _dtls_async_timer_active(gnutls_session_t session)
{
  if (!IS_DTLS(session))
    return 0;

  return session->internals.dtls.async_term;
}

/* This function is to be called from record layer once
 * a handshake replay is detected. It will make sure
 * it transmits only once per few seconds. Otherwise
 * it is the same as _dtls_transmit().
 */
inline static int _dtls_retransmit(gnutls_session_t session)
{
  return _dtls_transmit(session);
}

#endif /* GNUTLS_LIB_DTLS_H */

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright (C) 2009-2012 Free Software Foundation, Inc.
3		*
4		* Author: Jonathan Bastien-Filiatrault
5		*
6		* This file is part of GNUTLS.
7		*
8		* The GNUTLS library is free software; you can redistribute it and/or
9		* modify it under the terms of the GNU Lesser General Public License
10		* as published by the Free Software Foundation; either version 2.1 of
11		* the License, or (at your option) any later version.
12		*
13		* This library is distributed in the hope that it will be useful, but
14		* WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16		* Lesser General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program. If not, see <https://www.gnu.org/licenses/>
20		*
21		*/
22
23		#ifndef GNUTLS_LIB_DTLS_H
24		#define GNUTLS_LIB_DTLS_H
25
26		#include "config.h"
27		#include "gnutls_int.h"
28		#include "buffers.h"
29		#include "mbuffers.h"
30		#include "constate.h"
31
32		int _dtls_transmit(gnutls_session_t session);
33		int _dtls_record_check(struct record_parameters_st *rp, uint64_t seq_num);
34		void _dtls_reset_hsk_state(gnutls_session_t session);
35		void _dtls_reset_window(struct record_parameters_st *rp);
36
37	0	#define MAX_DTLS_TIMEOUT 60000
38
39		#define RETURN_DTLS_EAGAIN_OR_TIMEOUT(session, r) \
40	0	{ \
41	0	struct timespec _now; \
42	0	unsigned int _diff; \
43	0	gnutls_gettime(&_now); \
44	0	\
45	0	_diff = timespec_sub_ms( \
46	0	&_now, &session->internals.handshake_start_time); \
47	0	if (_diff > session->internals.handshake_timeout_ms) { \
48	0	_gnutls_dtls_log("Session timeout: %u ms\n", _diff); \
49	0	return gnutls_assert_val(GNUTLS_E_TIMEDOUT); \
50	0	} else { \
51	0	int _rr; \
52	0	if (r != GNUTLS_E_INTERRUPTED) \
53	0	_rr = GNUTLS_E_AGAIN; \
54	0	else \
55	0	_rr = r; \
56	0	if (!(session->internals.flags & GNUTLS_NONBLOCK)) \
57	0	millisleep(50); \
58	0	return gnutls_assert_val(_rr); \
59	0	} \
60	0	}
61
62		int _dtls_wait_and_retransmit(gnutls_session_t session);
63
64		/* returns true or false depending on whether we need to
65		* handle asynchronously handshake data.
66		*/
67		inline static int _dtls_is_async(gnutls_session_t session)
68	0	{
69	0	if ((session->security_parameters.entity == GNUTLS_SERVER &&
70	0	!session->internals.resumed) \|\|
71	0	(session->security_parameters.entity == GNUTLS_CLIENT &&
72	0	session->internals.resumed))
73	0	return 1;
74	0	else
75	0	return 0;
76	0	} Unexecuted instantiation: record.c:_dtls_is_async Unexecuted instantiation: handshake-tls13.c:_dtls_is_async Unexecuted instantiation: buffers.c:_dtls_is_async Unexecuted instantiation: handshake.c:_dtls_is_async Unexecuted instantiation: constate.c:_dtls_is_async Unexecuted instantiation: state.c:_dtls_is_async Unexecuted instantiation: dtls.c:_dtls_is_async Unexecuted instantiation: system_override.c:_dtls_is_async Unexecuted instantiation: dtls-sw.c:_dtls_is_async Unexecuted instantiation: post_handshake.c:_dtls_is_async Unexecuted instantiation: heartbeat.c:_dtls_is_async Unexecuted instantiation: session_ticket.c:_dtls_is_async
77
78		inline static void _dtls_async_timer_init(gnutls_session_t session)
79	0	{
80	0	if (_dtls_is_async(session)) {
81	0	_gnutls_dtls_log(
82	0	"DTLS[%p]: Initializing timer for handshake state.\n",
83	0	session);
84	0	session->internals.dtls.async_term =
85	0	gnutls_time(0) + MAX_DTLS_TIMEOUT / 1000;
86	0	} else {
87	0	_dtls_reset_hsk_state(session);
88	0	_gnutls_handshake_io_buffer_clear(session);
89	0	_gnutls_epoch_gc(session);
90	0	session->internals.dtls.async_term = 0;
91	0	}
92	0	} Unexecuted instantiation: record.c:_dtls_async_timer_init Unexecuted instantiation: handshake-tls13.c:_dtls_async_timer_init Unexecuted instantiation: buffers.c:_dtls_async_timer_init Unexecuted instantiation: handshake.c:_dtls_async_timer_init Unexecuted instantiation: constate.c:_dtls_async_timer_init Unexecuted instantiation: state.c:_dtls_async_timer_init Unexecuted instantiation: dtls.c:_dtls_async_timer_init Unexecuted instantiation: system_override.c:_dtls_async_timer_init Unexecuted instantiation: dtls-sw.c:_dtls_async_timer_init Unexecuted instantiation: post_handshake.c:_dtls_async_timer_init Unexecuted instantiation: heartbeat.c:_dtls_async_timer_init Unexecuted instantiation: session_ticket.c:_dtls_async_timer_init
93
94		void _dtls_async_timer_delete(gnutls_session_t session);
95
96		/* Checks whether it is time to terminate the timer
97		*/
98		inline static void _dtls_async_timer_check(gnutls_session_t session)
99	0	{
100	0	if (!IS_DTLS(session))
101	0	return;
102
103	0	if (session->internals.dtls.async_term != 0) {
104	0	time_t _now = time(0);
105
106		/* check if we need to expire the queued handshake data */
107	0	if (_now > session->internals.dtls.async_term) {
108	0	_dtls_async_timer_delete(session);
109	0	}
110	0	}
111	0	} Unexecuted instantiation: record.c:_dtls_async_timer_check Unexecuted instantiation: handshake-tls13.c:_dtls_async_timer_check Unexecuted instantiation: buffers.c:_dtls_async_timer_check Unexecuted instantiation: handshake.c:_dtls_async_timer_check Unexecuted instantiation: constate.c:_dtls_async_timer_check Unexecuted instantiation: state.c:_dtls_async_timer_check Unexecuted instantiation: dtls.c:_dtls_async_timer_check Unexecuted instantiation: system_override.c:_dtls_async_timer_check Unexecuted instantiation: dtls-sw.c:_dtls_async_timer_check Unexecuted instantiation: post_handshake.c:_dtls_async_timer_check Unexecuted instantiation: heartbeat.c:_dtls_async_timer_check Unexecuted instantiation: session_ticket.c:_dtls_async_timer_check
112
113		unsigned _gnutls_record_overhead(const version_entry_st *ver,
114		const cipher_entry_st *cipher,
115		const mac_entry_st *mac, unsigned max);
116
117		/* Returns non-zero if the async timer is active */
118		inline static int _dtls_async_timer_active(gnutls_session_t session)
119	0	{
120	0	if (!IS_DTLS(session))
121	0	return 0;
122
123	0	return session->internals.dtls.async_term;
124	0	} Unexecuted instantiation: record.c:_dtls_async_timer_active Unexecuted instantiation: handshake-tls13.c:_dtls_async_timer_active Unexecuted instantiation: buffers.c:_dtls_async_timer_active Unexecuted instantiation: handshake.c:_dtls_async_timer_active Unexecuted instantiation: constate.c:_dtls_async_timer_active Unexecuted instantiation: state.c:_dtls_async_timer_active Unexecuted instantiation: dtls.c:_dtls_async_timer_active Unexecuted instantiation: system_override.c:_dtls_async_timer_active Unexecuted instantiation: dtls-sw.c:_dtls_async_timer_active Unexecuted instantiation: post_handshake.c:_dtls_async_timer_active Unexecuted instantiation: heartbeat.c:_dtls_async_timer_active Unexecuted instantiation: session_ticket.c:_dtls_async_timer_active
125
126		/* This function is to be called from record layer once
127		* a handshake replay is detected. It will make sure
128		* it transmits only once per few seconds. Otherwise
129		* it is the same as _dtls_transmit().
130		*/
131		inline static int _dtls_retransmit(gnutls_session_t session)
132	0	{
133	0	return _dtls_transmit(session);
134	0	} Unexecuted instantiation: record.c:_dtls_retransmit Unexecuted instantiation: handshake-tls13.c:_dtls_retransmit Unexecuted instantiation: buffers.c:_dtls_retransmit Unexecuted instantiation: handshake.c:_dtls_retransmit Unexecuted instantiation: constate.c:_dtls_retransmit Unexecuted instantiation: state.c:_dtls_retransmit Unexecuted instantiation: dtls.c:_dtls_retransmit Unexecuted instantiation: system_override.c:_dtls_retransmit Unexecuted instantiation: dtls-sw.c:_dtls_retransmit Unexecuted instantiation: post_handshake.c:_dtls_retransmit Unexecuted instantiation: heartbeat.c:_dtls_retransmit Unexecuted instantiation: session_ticket.c:_dtls_retransmit
135
136		#endif /* GNUTLS_LIB_DTLS_H */

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Created: 2025-03-06 06:58