/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1999-2005 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 2005-2017 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "bio_lcl.h"
#ifndef OPENSSL_NO_DGRAM
-# if !(defined(_WIN32) || defined(OPENSSL_SYS_VMS))
-# include <sys/time.h>
-# endif
-# if defined(OPENSSL_SYS_VMS)
-# include <sys/timeb.h>
-# endif
-
# ifndef OPENSSL_NO_SCTP
# include <netinet/sctp.h>
# include <fcntl.h>
((a)->s6_addr32[2] == htonl(0x0000ffff)))
# endif
-# ifdef WATT32
-# define sock_write SockWrite /* Watt-32 uses same names */
-# define sock_read SockRead
-# define sock_puts SockPuts
-# endif
-
static int dgram_write(BIO *h, const char *buf, int num);
static int dgram_read(BIO *h, char *buf, int size);
static int dgram_puts(BIO *h, const char *str);
static void get_current_time(struct timeval *t);
-static BIO_METHOD methods_dgramp = {
+static const BIO_METHOD methods_dgramp = {
BIO_TYPE_DGRAM,
"datagram socket",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
dgram_write,
+ /* TODO: Convert to new style read function */
+ bread_conv,
dgram_read,
dgram_puts,
- NULL, /* dgram_gets, */
+ NULL, /* dgram_gets, */
dgram_ctrl,
dgram_new,
dgram_free,
- NULL,
+ NULL, /* dgram_callback_ctrl */
};
# ifndef OPENSSL_NO_SCTP
-static BIO_METHOD methods_dgramp_sctp = {
+static const BIO_METHOD methods_dgramp_sctp = {
BIO_TYPE_DGRAM_SCTP,
"datagram sctp socket",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
dgram_sctp_write,
+ /* TODO: Convert to new style write function */
+ bread_conv,
dgram_sctp_read,
dgram_sctp_puts,
- NULL, /* dgram_gets, */
+ NULL, /* dgram_gets, */
dgram_sctp_ctrl,
dgram_sctp_new,
dgram_sctp_free,
- NULL,
+ NULL, /* dgram_callback_ctrl */
};
# endif
int ccs_sent;
int save_shutdown;
int peer_auth_tested;
- bio_dgram_sctp_save_message saved_message;
} bio_dgram_sctp_data;
# endif
-BIO_METHOD *BIO_s_datagram(void)
+const BIO_METHOD *BIO_s_datagram(void)
{
- return (&methods_dgramp);
+ return &methods_dgramp;
}
BIO *BIO_new_dgram(int fd, int close_flag)
ret = BIO_new(BIO_s_datagram());
if (ret == NULL)
- return (NULL);
+ return NULL;
BIO_set_fd(ret, fd, close_flag);
- return (ret);
+ return ret;
}
static int dgram_new(BIO *bi)
if (data == NULL)
return 0;
bi->ptr = data;
- return (1);
+ return 1;
}
static int dgram_free(BIO *a)
bio_dgram_data *data;
if (a == NULL)
- return (0);
+ return 0;
if (!dgram_clear(a))
return 0;
data = (bio_dgram_data *)a->ptr;
OPENSSL_free(data);
- return (1);
+ return 1;
}
static int dgram_clear(BIO *a)
{
if (a == NULL)
- return (0);
+ return 0;
if (a->shutdown) {
if (a->init) {
- SHUTDOWN2(a->num);
+ BIO_closesocket(a->num);
}
a->init = 0;
a->flags = 0;
}
- return (1);
+ return 1;
}
static void dgram_adjust_rcv_timeout(BIO *b)
dgram_reset_rcv_timeout(b);
}
- return (ret);
+ return ret;
}
static int dgram_write(BIO *b, const char *in, int inl)
else {
int peerlen = BIO_ADDR_sockaddr_size(&data->peer);
-# if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
- ret = sendto(b->num, (char *)in, inl, 0,
- BIO_ADDR_sockaddr(&data->peer), peerlen);
-# else
ret = sendto(b->num, in, inl, 0,
BIO_ADDR_sockaddr(&data->peer), peerlen);
-# endif
}
BIO_clear_retry_flags(b);
data->_errno = get_last_socket_error();
}
}
- return (ret);
+ return ret;
}
static long dgram_get_mtu_overhead(bio_dgram_data *data)
int *ip;
bio_dgram_data *data = NULL;
int sockopt_val = 0;
+ int d_errno;
# if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
socklen_t sockopt_len; /* assume that system supporting IP_MTU is
* modern enough to define socklen_t */
/* fall-through */
case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
# ifdef OPENSSL_SYS_WINDOWS
- if (data->_errno == WSAETIMEDOUT)
+ d_errno = (data->_errno == WSAETIMEDOUT);
# else
- if (data->_errno == EAGAIN)
+ d_errno = (data->_errno == EAGAIN);
# endif
- {
+ if (d_errno) {
ret = 1;
data->_errno = 0;
} else
case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
ret = dgram_get_mtu_overhead(data);
break;
+
+ /*
+ * BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE is used here for compatibility
+ * reasons. When BIO_CTRL_DGRAM_SET_PEEK_MODE was first defined its value
+ * was incorrectly clashing with BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE. The
+ * value has been updated to a non-clashing value. However to preserve
+ * binary compatiblity we now respond to both the old value and the new one
+ */
+ case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
case BIO_CTRL_DGRAM_SET_PEEK_MODE:
data->peekmode = (unsigned int)num;
break;
ret = 0;
break;
}
- return (ret);
+ return ret;
}
static int dgram_puts(BIO *bp, const char *str)
n = strlen(str);
ret = dgram_write(bp, str, n);
- return (ret);
+ return ret;
}
# ifndef OPENSSL_NO_SCTP
-BIO_METHOD *BIO_s_datagram_sctp(void)
+const BIO_METHOD *BIO_s_datagram_sctp(void)
{
- return (&methods_dgramp_sctp);
+ return &methods_dgramp_sctp;
}
BIO *BIO_new_dgram_sctp(int fd, int close_flag)
bio = BIO_new(BIO_s_datagram_sctp());
if (bio == NULL)
- return (NULL);
+ return NULL;
BIO_set_fd(bio, fd, close_flag);
/* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
sizeof(struct sctp_authchunk));
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
+ return NULL;
}
auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
ret =
sizeof(struct sctp_authchunk));
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
+ return NULL;
}
/*
* Test if activation was successful. When using accept(), SCTP-AUTH has
* to be activated for the listening socket already, otherwise the
- * connected socket won't use it.
+ * connected socket won't use it. Similarly with connect(): the socket
+ * prior to connection must be activated for SCTP-AUTH
*/
sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
authchunks = OPENSSL_zalloc(sockopt_len);
if (authchunks == NULL) {
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
&sockopt_len);
if (ret < 0) {
OPENSSL_free(authchunks);
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
for (p = (unsigned char *)authchunks->gauth_chunks;
OPENSSL_free(authchunks);
- OPENSSL_assert(auth_data);
- OPENSSL_assert(auth_forward);
+ if (!auth_data || !auth_forward) {
+ BIO_vfree(bio);
+ BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1,
+ "Ensure SCTP AUTH chunks are enabled on the "
+ "underlying socket");
+ return NULL;
+ }
# ifdef SCTP_AUTHENTICATION_EVENT
# ifdef SCTP_EVENT
sizeof(struct sctp_event));
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
# else
sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
event.sctp_authentication_event = 1;
sizeof(struct sctp_event_subscribe));
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
# endif
# endif
sizeof(optval));
if (ret < 0) {
BIO_vfree(bio);
- return (NULL);
+ return NULL;
}
- return (bio);
+ return bio;
}
int BIO_dgram_is_sctp(BIO *bio)
bi->ptr = data;
bi->flags = 0;
- return (1);
+ return 1;
}
static int dgram_sctp_free(BIO *a)
bio_dgram_sctp_data *data;
if (a == NULL)
- return (0);
+ return 0;
if (!dgram_clear(a))
return 0;
data = (bio_dgram_sctp_data *) a->ptr;
- if (data != NULL) {
- OPENSSL_free(data->saved_message.data);
+ if (data != NULL)
OPENSSL_free(data);
- }
- return (1);
+ return 1;
}
# ifdef SCTP_AUTHENTICATION_EVENT
struct sctp_event_subscribe event;
socklen_t eventsize;
# endif
- /*
- * If a message has been delayed until the socket is dry,
- * it can be sent now.
- */
- if (data->saved_message.length > 0) {
- i = dgram_sctp_write(data->saved_message.bio,
- data->saved_message.data,
- data->saved_message.length);
- if (i < 0) {
- ret = i;
- break;
- }
- OPENSSL_free(data->saved_message.data);
- data->saved_message.data = NULL;
- data->saved_message.length = 0;
- }
/* disable sender dry event */
# ifdef SCTP_EVENT
data->peer_auth_tested = 1;
}
}
- return (ret);
+ return ret;
}
/*
sinfo = &handshake_sinfo;
}
- /*
- * If we have to send a shutdown alert message and the socket is not dry
- * yet, we have to save it and send it as soon as the socket gets dry.
- */
+ /* We can only send a shutdown alert if the socket is dry */
if (data->save_shutdown) {
ret = BIO_dgram_sctp_wait_for_dry(b);
- if (ret < 0) {
+ if (ret < 0)
return -1;
- }
if (ret == 0) {
- char *tmp;
- data->saved_message.bio = b;
- if ((tmp = OPENSSL_malloc(inl)) == NULL) {
- BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
- return -1;
- }
- OPENSSL_free(data->saved_message.data);
- data->saved_message.data = tmp;
- memcpy(data->saved_message.data, in, inl);
- data->saved_message.length = inl;
- return inl;
+ BIO_clear_retry_flags(b);
+ BIO_set_retry_write(b);
+ return -1;
}
}
data->_errno = get_last_socket_error();
}
}
- return (ret);
+ return ret;
}
static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
* we need to deactivate an old key
*/
data->ccs_sent = 1;
+ /* fall-through */
case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
/* Returns 0 on success, -1 otherwise. */
ret = dgram_ctrl(b, cmd, num, ptr);
break;
}
- return (ret);
+ return ret;
}
int BIO_dgram_sctp_notification_cb(BIO *b,
n = strlen(str);
ret = dgram_sctp_write(bp, str, n);
- return (ret);
+ return ret;
}
# endif
*/
# endif
- return (BIO_dgram_non_fatal_error(err));
+ return BIO_dgram_non_fatal_error(err);
}
- return (0);
+ return 0;
}
int BIO_dgram_non_fatal_error(int err)
case EALREADY:
# endif
- return (1);
- /* break; */
+ return 1;
default:
break;
}
- return (0);
+ return 0;
}
static void get_current_time(struct timeval *t)
# endif
t->tv_sec = (long)(now.ul / 10000000);
t->tv_usec = ((int)(now.ul % 10000000)) / 10;
-# elif defined(OPENSSL_SYS_VMS)
- struct timeb tb;
- ftime(&tb);
- t->tv_sec = (long)tb.time;
- t->tv_usec = (long)tb.millitm * 1000;
# else
gettimeofday(t, NULL);
# endif
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