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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/bio/bss_dgram.c	Lines:	0	200	0.0 %
Date:	2017-11-07	Branches:	0	140	0.0 %


/* $OpenBSD: bss_dgram.c,v 1.41 2015/07/20 23:15:28 doug Exp $ */
/*
 * 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).
 *
 */

#include <sys/socket.h>
#include <sys/time.h>

#include <netinet/in.h>

#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <openssl/opensslconf.h>

#include <openssl/bio.h>

#ifndef OPENSSL_NO_DGRAM


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 long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int dgram_new(BIO *h);
static int dgram_free(BIO *data);
static int dgram_clear(BIO *bio);


static int BIO_dgram_should_retry(int s);

static BIO_METHOD methods_dgramp = {
	.type = BIO_TYPE_DGRAM,
	.name = "datagram socket",
	.bwrite = dgram_write,
	.bread = dgram_read,
	.bputs = dgram_puts,
	.ctrl = dgram_ctrl,
	.create = dgram_new,
	.destroy = dgram_free
};


typedef struct bio_dgram_data_st {
	union {
		struct sockaddr sa;
		struct sockaddr_in sa_in;
		struct sockaddr_in6 sa_in6;
	} peer;
	unsigned int connected;
	unsigned int _errno;
	unsigned int mtu;
	struct timeval next_timeout;
	struct timeval socket_timeout;
} bio_dgram_data;


BIO_METHOD *
BIO_s_datagram(void)
{
	return (&methods_dgramp);
}

BIO *
BIO_new_dgram(int fd, int close_flag)
{
	BIO *ret;

	ret = BIO_new(BIO_s_datagram());
	if (ret == NULL)
		return (NULL);
	BIO_set_fd(ret, fd, close_flag);
	return (ret);
}

static int
dgram_new(BIO *bi)
{
	bio_dgram_data *data = NULL;

	bi->init = 0;
	bi->num = 0;
	data = calloc(1, sizeof(bio_dgram_data));
	if (data == NULL)
		return 0;
	bi->ptr = data;

	bi->flags = 0;
	return (1);
}

static int
dgram_free(BIO *a)
{
	bio_dgram_data *data;

	if (a == NULL)
		return (0);
	if (!dgram_clear(a))
		return 0;

	data = (bio_dgram_data *)a->ptr;
	free(data);

	return (1);
}

static int
dgram_clear(BIO *a)
{
	if (a == NULL)
		return (0);
	if (a->shutdown) {
		if (a->init) {
			shutdown(a->num, SHUT_RDWR);
			close(a->num);
		}
		a->init = 0;
		a->flags = 0;
	}
	return (1);
}

static void
dgram_adjust_rcv_timeout(BIO *b)
{
#if defined(SO_RCVTIMEO)
	bio_dgram_data *data = (bio_dgram_data *)b->ptr;

	/* Is a timer active? */
	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
		struct timeval timenow, timeleft;

		/* Read current socket timeout */
		socklen_t sz = sizeof(data->socket_timeout);
		if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
		    &(data->socket_timeout), &sz) < 0) {
			perror("getsockopt");
		}

		/* Get current time */
		gettimeofday(&timenow, NULL);

		/* Calculate time left until timer expires */
		memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
		timeleft.tv_sec -= timenow.tv_sec;
		timeleft.tv_usec -= timenow.tv_usec;
		if (timeleft.tv_usec < 0) {
			timeleft.tv_sec--;
			timeleft.tv_usec += 1000000;
		}

		if (timeleft.tv_sec < 0) {
			timeleft.tv_sec = 0;
			timeleft.tv_usec = 1;
		}

		/* Adjust socket timeout if next handhake message timer
		 * will expire earlier.
		 */
		if ((data->socket_timeout.tv_sec == 0 &&
		    data->socket_timeout.tv_usec == 0) ||
		    (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
		    (data->socket_timeout.tv_sec == timeleft.tv_sec &&
		    data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
			    &timeleft, sizeof(struct timeval)) < 0) {
				perror("setsockopt");
			}
		}
	}
#endif
}

static void
dgram_reset_rcv_timeout(BIO *b)
{
#if defined(SO_RCVTIMEO)
	bio_dgram_data *data = (bio_dgram_data *)b->ptr;

	/* Is a timer active? */
	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
		    &(data->socket_timeout), sizeof(struct timeval)) < 0) {
			perror("setsockopt");
		}
	}
#endif
}

static int
dgram_read(BIO *b, char *out, int outl)
{
	int ret = 0;
	bio_dgram_data *data = (bio_dgram_data *)b->ptr;

	struct	{
		socklen_t len;
		union	{
			struct sockaddr sa;
			struct sockaddr_in sa_in;
			struct sockaddr_in6 sa_in6;
		} peer;
	} sa;

	sa.len = sizeof(sa.peer);

	if (out != NULL) {
		errno = 0;
		memset(&sa.peer, 0, sizeof(sa.peer));
		dgram_adjust_rcv_timeout(b);
		ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, &sa.len);

		if (! data->connected  && ret >= 0)
			BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);

		BIO_clear_retry_flags(b);
		if (ret < 0) {
			if (BIO_dgram_should_retry(ret)) {
				BIO_set_retry_read(b);
				data->_errno = errno;
			}
		}

		dgram_reset_rcv_timeout(b);
	}
	return (ret);
}

static int
dgram_write(BIO *b, const char *in, int inl)
{
	int ret;
	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
	errno = 0;

	if (data->connected)
		ret = write(b->num, in, inl);
	else {
		int peerlen = sizeof(data->peer);

		if (data->peer.sa.sa_family == AF_INET)
			peerlen = sizeof(data->peer.sa_in);
		else if (data->peer.sa.sa_family == AF_INET6)
			peerlen = sizeof(data->peer.sa_in6);
		ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
	}

	BIO_clear_retry_flags(b);
	if (ret <= 0) {
		if (BIO_dgram_should_retry(ret)) {
			BIO_set_retry_write(b);

			data->_errno = errno;
			/*
			 * higher layers are responsible for querying MTU,
			 * if necessary
			 */
		}
	}
	return (ret);
}

static long
dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
{
	long ret = 1;
	int *ip;
	struct sockaddr *to = NULL;
	bio_dgram_data *data = NULL;
#if (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
	int sockopt_val = 0;
	socklen_t sockopt_len;	/* assume that system supporting IP_MTU is
				 * modern enough to define socklen_t */
	socklen_t addr_len;
	union	{
		struct sockaddr	sa;
		struct sockaddr_in s4;
		struct sockaddr_in6 s6;
	} addr;
#endif

	data = (bio_dgram_data *)b->ptr;

	switch (cmd) {
	case BIO_CTRL_RESET:
		num = 0;
	case BIO_C_FILE_SEEK:
		ret = 0;
		break;
	case BIO_C_FILE_TELL:
	case BIO_CTRL_INFO:
		ret = 0;
		break;
	case BIO_C_SET_FD:
		dgram_clear(b);
		b->num= *((int *)ptr);
		b->shutdown = (int)num;
		b->init = 1;
		break;
	case BIO_C_GET_FD:
		if (b->init) {
			ip = (int *)ptr;
			if (ip != NULL)
				*ip = b->num;
			ret = b->num;
		} else
			ret = -1;
		break;
	case BIO_CTRL_GET_CLOSE:
		ret = b->shutdown;
		break;
	case BIO_CTRL_SET_CLOSE:
		b->shutdown = (int)num;
		break;
	case BIO_CTRL_PENDING:
	case BIO_CTRL_WPENDING:
		ret = 0;
		break;
	case BIO_CTRL_DUP:
	case BIO_CTRL_FLUSH:
		ret = 1;
		break;
	case BIO_CTRL_DGRAM_CONNECT:
		to = (struct sockaddr *)ptr;
		switch (to->sa_family) {
		case AF_INET:
			memcpy(&data->peer, to, sizeof(data->peer.sa_in));
			break;
		case AF_INET6:
			memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
			break;
		default:
			memcpy(&data->peer, to, sizeof(data->peer.sa));
			break;
		}
		break;
		/* (Linux)kernel sets DF bit on outgoing IP packets */
	case BIO_CTRL_DGRAM_MTU_DISCOVER:
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
		addr_len = (socklen_t)sizeof(addr);
		memset((void *)&addr, 0, sizeof(addr));
		if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
			ret = 0;
			break;
		}
		switch (addr.sa.sa_family) {
		case AF_INET:
			sockopt_val = IP_PMTUDISC_DO;
			ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
			    &sockopt_val, sizeof(sockopt_val));
			if (ret < 0)
				perror("setsockopt");
			break;
#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
		case AF_INET6:
			sockopt_val = IPV6_PMTUDISC_DO;
			ret = setsockopt(b->num, IPPROTO_IPV6,
			    IPV6_MTU_DISCOVER, &sockopt_val,
			    sizeof(sockopt_val));
			if (ret < 0)
				perror("setsockopt");
			break;
#endif
		default:
			ret = -1;
			break;
		}
#else
		ret = -1;
#endif
		break;
	case BIO_CTRL_DGRAM_QUERY_MTU:
#if defined(IP_MTU)
		addr_len = (socklen_t)sizeof(addr);
		memset((void *)&addr, 0, sizeof(addr));
		if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
			ret = 0;
			break;
		}
		sockopt_len = sizeof(sockopt_val);
		switch (addr.sa.sa_family) {
		case AF_INET:
			ret = getsockopt(b->num, IPPROTO_IP, IP_MTU,
			    &sockopt_val, &sockopt_len);
			if (ret < 0 || sockopt_val < 0) {
				ret = 0;
			} else {
				/* we assume that the transport protocol is UDP and no
				 * IP options are used.
				 */
				data->mtu = sockopt_val - 8 - 20;
				ret = data->mtu;
			}
			break;
#if defined(IPV6_MTU)
		case AF_INET6:
			ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
			    &sockopt_val, &sockopt_len);
			if (ret < 0 || sockopt_val < 0) {
				ret = 0;
			} else {
				/* we assume that the transport protocol is UDP and no
				 * IPV6 options are used.
				 */
				data->mtu = sockopt_val - 8 - 40;
				ret = data->mtu;
			}
			break;
#endif
default:
			ret = 0;
			break;
		}
#else
		ret = 0;
#endif
		break;
	case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
		switch (data->peer.sa.sa_family) {
		case AF_INET:
			ret = 576 - 20 - 8;
			break;
		case AF_INET6:
#ifdef IN6_IS_ADDR_V4MAPPED
			if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
				ret = 576 - 20 - 8;
			else
#endif
				ret = 1280 - 40 - 8;
			break;
		default:
			ret = 576 - 20 - 8;
			break;
		}
		break;
	case BIO_CTRL_DGRAM_GET_MTU:
		return data->mtu;
		break;
	case BIO_CTRL_DGRAM_SET_MTU:
		data->mtu = num;
		ret = num;
		break;
	case BIO_CTRL_DGRAM_SET_CONNECTED:
		to = (struct sockaddr *)ptr;

		if (to != NULL) {
			data->connected = 1;
			switch (to->sa_family) {
			case AF_INET:
				memcpy(&data->peer, to, sizeof(data->peer.sa_in));
				break;
			case AF_INET6:
				memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
				break;
			default:
				memcpy(&data->peer, to, sizeof(data->peer.sa));
				break;
			}
		} else {
			data->connected = 0;
			memset(&(data->peer), 0, sizeof(data->peer));
		}
		break;
	case BIO_CTRL_DGRAM_GET_PEER:
		switch (data->peer.sa.sa_family) {
		case AF_INET:
			ret = sizeof(data->peer.sa_in);
			break;
		case AF_INET6:
			ret = sizeof(data->peer.sa_in6);
			break;
		default:
			ret = sizeof(data->peer.sa);
			break;
		}
		if (num == 0 || num > ret)
			num = ret;
		memcpy(ptr, &data->peer, (ret = num));
		break;
	case BIO_CTRL_DGRAM_SET_PEER:
		to = (struct sockaddr *) ptr;
		switch (to->sa_family) {
		case AF_INET:
			memcpy(&data->peer, to, sizeof(data->peer.sa_in));
			break;
		case AF_INET6:
			memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
			break;
		default:
			memcpy(&data->peer, to, sizeof(data->peer.sa));
			break;
		}
		break;
	case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
		memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
		break;
#if defined(SO_RCVTIMEO)
	case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
		    sizeof(struct timeval)) < 0) {
			perror("setsockopt");
			ret = -1;
		}
		break;
	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
		{
			socklen_t sz = sizeof(struct timeval);
			if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
			    ptr, &sz) < 0) {
				perror("getsockopt");
				ret = -1;
			} else
				ret = sz;
		}
		break;
#endif
#if defined(SO_SNDTIMEO)
	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
		if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
		    sizeof(struct timeval)) < 0) {
			perror("setsockopt");
			ret = -1;
		}
		break;
	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
		{
			socklen_t sz = sizeof(struct timeval);
			if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
			    ptr, &sz) < 0) {
				perror("getsockopt");
				ret = -1;
			} else
				ret = sz;
		}
		break;
#endif
	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
		/* fall-through */
	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
		if (data->_errno == EAGAIN) {
			ret = 1;
			data->_errno = 0;
		} else
			ret = 0;
		break;
#ifdef EMSGSIZE
	case BIO_CTRL_DGRAM_MTU_EXCEEDED:
		if (data->_errno == EMSGSIZE) {
			ret = 1;
			data->_errno = 0;
		} else
			ret = 0;
		break;
#endif
	default:
		ret = 0;
		break;
	}
	return (ret);
}

static int
dgram_puts(BIO *bp, const char *str)
{
	int n, ret;

	n = strlen(str);
	ret = dgram_write(bp, str, n);
	return (ret);
}


static int
BIO_dgram_should_retry(int i)
{
	int err;

	if ((i == 0) || (i == -1)) {
		err = errno;
		return (BIO_dgram_non_fatal_error(err));
	}
	return (0);
}

int
BIO_dgram_non_fatal_error(int err)
{
	switch (err) {
	case EINTR:
	case EAGAIN:
	case EINPROGRESS:
	case EALREADY:
		return (1);
	default:
		break;
	}
	return (0);
}

#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: bss_dgram.c,v 1.41 2015/07/20 23:15:28 doug Exp $ */
2			/*
3			* DTLS implementation written by Nagendra Modadugu
4			* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5			*/
6			/* ====================================================================
7			* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			*
13			* 1. Redistributions of source code must retain the above copyright
14			* notice, this list of conditions and the following disclaimer.
15			*
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in
18			* the documentation and/or other materials provided with the
19			* distribution.
20			*
21			* 3. All advertising materials mentioning features or use of this
22			* software must display the following acknowledgment:
23			* "This product includes software developed by the OpenSSL Project
24			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25			*
26			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27			* endorse or promote products derived from this software without
28			* prior written permission. For written permission, please contact
29			* openssl-core@OpenSSL.org.
30			*
31			* 5. Products derived from this software may not be called "OpenSSL"
32			* nor may "OpenSSL" appear in their names without prior written
33			* permission of the OpenSSL Project.
34			*
35			* 6. Redistributions of any form whatsoever must retain the following
36			* acknowledgment:
37			* "This product includes software developed by the OpenSSL Project
38			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39			*
40			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51			* OF THE POSSIBILITY OF SUCH DAMAGE.
52			* ====================================================================
53			*
54			* This product includes cryptographic software written by Eric Young
55			* (eay@cryptsoft.com). This product includes software written by Tim
56			* Hudson (tjh@cryptsoft.com).
57			*
58			*/
59
60			#include <sys/socket.h>
61			#include <sys/time.h>
62
63			#include <netinet/in.h>
64
65			#include <errno.h>
66			#include <netdb.h>
67			#include <stdio.h>
68			#include <string.h>
69			#include <unistd.h>
70
71			#include <openssl/opensslconf.h>
72
73			#include <openssl/bio.h>
74
75			#ifndef OPENSSL_NO_DGRAM
76
77
78			static int dgram_write(BIO h, const char buf, int num);
79			static int dgram_read(BIO h, char buf, int size);
80			static int dgram_puts(BIO h, const char str);
81			static long dgram_ctrl(BIO h, int cmd, long arg1, void arg2);
82			static int dgram_new(BIO *h);
83			static int dgram_free(BIO *data);
84			static int dgram_clear(BIO *bio);
85
86
87			static int BIO_dgram_should_retry(int s);
88
89			static BIO_METHOD methods_dgramp = {
90			.type = BIO_TYPE_DGRAM,
91			.name = "datagram socket",
92			.bwrite = dgram_write,
93			.bread = dgram_read,
94			.bputs = dgram_puts,
95			.ctrl = dgram_ctrl,
96			.create = dgram_new,
97			.destroy = dgram_free
98			};
99
100
101			typedef struct bio_dgram_data_st {
102			union {
103			struct sockaddr sa;
104			struct sockaddr_in sa_in;
105			struct sockaddr_in6 sa_in6;
106			} peer;
107			unsigned int connected;
108			unsigned int _errno;
109			unsigned int mtu;
110			struct timeval next_timeout;
111			struct timeval socket_timeout;
112			} bio_dgram_data;
113
114
115			BIO_METHOD *
116			BIO_s_datagram(void)
117			{
118			return (&methods_dgramp);
119			}
120
121			BIO *
122			BIO_new_dgram(int fd, int close_flag)
123			{
124			BIO *ret;
125
126			ret = BIO_new(BIO_s_datagram());
127			if (ret == NULL)
128			return (NULL);
129			BIO_set_fd(ret, fd, close_flag);
130			return (ret);
131			}
132
133			static int
134			dgram_new(BIO *bi)
135			{
136			bio_dgram_data *data = NULL;
137
138			bi->init = 0;
139			bi->num = 0;
140			data = calloc(1, sizeof(bio_dgram_data));
141			if (data == NULL)
142			return 0;
143			bi->ptr = data;
144
145			bi->flags = 0;
146			return (1);
147			}
148
149			static int
150			dgram_free(BIO *a)
151			{
152			bio_dgram_data *data;
153
154			if (a == NULL)
155			return (0);
156			if (!dgram_clear(a))
157			return 0;
158
159			data = (bio_dgram_data *)a->ptr;
160			free(data);
161
162			return (1);
163			}
164
165			static int
166			dgram_clear(BIO *a)
167			{
168			if (a == NULL)
169			return (0);
170			if (a->shutdown) {
171			if (a->init) {
172			shutdown(a->num, SHUT_RDWR);
173			close(a->num);
174			}
175			a->init = 0;
176			a->flags = 0;
177			}
178			return (1);
179			}
180
181			static void
182			dgram_adjust_rcv_timeout(BIO *b)
183			{
184			#if defined(SO_RCVTIMEO)
185			bio_dgram_data data = (bio_dgram_data )b->ptr;
186
187			/* Is a timer active? */
188			if (data->next_timeout.tv_sec > 0 \|\| data->next_timeout.tv_usec > 0) {
189			struct timeval timenow, timeleft;
190
191			/* Read current socket timeout */
192			socklen_t sz = sizeof(data->socket_timeout);
193			if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
194			&(data->socket_timeout), &sz) < 0) {
195			perror("getsockopt");
196			}
197
198			/* Get current time */
199			gettimeofday(&timenow, NULL);
200
201			/* Calculate time left until timer expires */
202			memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
203			timeleft.tv_sec -= timenow.tv_sec;
204			timeleft.tv_usec -= timenow.tv_usec;
205			if (timeleft.tv_usec < 0) {
206			timeleft.tv_sec--;
207			timeleft.tv_usec += 1000000;
208			}
209
210			if (timeleft.tv_sec < 0) {
211			timeleft.tv_sec = 0;
212			timeleft.tv_usec = 1;
213			}
214
215			/* Adjust socket timeout if next handhake message timer
216			* will expire earlier.
217			*/
218			if ((data->socket_timeout.tv_sec == 0 &&
219			data->socket_timeout.tv_usec == 0) \|\|
220			(data->socket_timeout.tv_sec > timeleft.tv_sec) \|\|
221			(data->socket_timeout.tv_sec == timeleft.tv_sec &&
222			data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
223			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
224			&timeleft, sizeof(struct timeval)) < 0) {
225			perror("setsockopt");
226			}
227			}
228			}
229			#endif
230			}
231
232			static void
233			dgram_reset_rcv_timeout(BIO *b)
234			{
235			#if defined(SO_RCVTIMEO)
236			bio_dgram_data data = (bio_dgram_data )b->ptr;
237
238			/* Is a timer active? */
239			if (data->next_timeout.tv_sec > 0 \|\| data->next_timeout.tv_usec > 0) {
240			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
241			&(data->socket_timeout), sizeof(struct timeval)) < 0) {
242			perror("setsockopt");
243			}
244			}
245			#endif
246			}
247
248			static int
249			dgram_read(BIO b, char out, int outl)
250			{
251			int ret = 0;
252			bio_dgram_data data = (bio_dgram_data )b->ptr;
253
254			struct {
255			socklen_t len;
256			union {
257			struct sockaddr sa;
258			struct sockaddr_in sa_in;
259			struct sockaddr_in6 sa_in6;
260			} peer;
261			} sa;
262
263			sa.len = sizeof(sa.peer);
264
265			if (out != NULL) {
266			errno = 0;
267			memset(&sa.peer, 0, sizeof(sa.peer));
268			dgram_adjust_rcv_timeout(b);
269			ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, &sa.len);
270
271			if (! data->connected && ret >= 0)
272			BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
273
274			BIO_clear_retry_flags(b);
275			if (ret < 0) {
276			if (BIO_dgram_should_retry(ret)) {
277			BIO_set_retry_read(b);
278			data->_errno = errno;
279			}
280			}
281
282			dgram_reset_rcv_timeout(b);
283			}
284			return (ret);
285			}
286
287			static int
288			dgram_write(BIO b, const char in, int inl)
289			{
290			int ret;
291			bio_dgram_data data = (bio_dgram_data )b->ptr;
292			errno = 0;
293
294			if (data->connected)
295			ret = write(b->num, in, inl);
296			else {
297			int peerlen = sizeof(data->peer);
298
299			if (data->peer.sa.sa_family == AF_INET)
300			peerlen = sizeof(data->peer.sa_in);
301			else if (data->peer.sa.sa_family == AF_INET6)
302			peerlen = sizeof(data->peer.sa_in6);
303			ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
304			}
305
306			BIO_clear_retry_flags(b);
307			if (ret <= 0) {
308			if (BIO_dgram_should_retry(ret)) {
309			BIO_set_retry_write(b);
310
311			data->_errno = errno;
312			/*
313			* higher layers are responsible for querying MTU,
314			* if necessary
315			*/
316			}
317			}
318			return (ret);
319			}
320
321			static long
322			dgram_ctrl(BIO b, int cmd, long num, void ptr)
323			{
324			long ret = 1;
325			int *ip;
326			struct sockaddr *to = NULL;
327			bio_dgram_data *data = NULL;
328			#if (defined(IP_MTU_DISCOVER) \|\| defined(IP_MTU))
329			int sockopt_val = 0;
330			socklen_t sockopt_len; /* assume that system supporting IP_MTU is
331			* modern enough to define socklen_t */
332			socklen_t addr_len;
333			union {
334			struct sockaddr sa;
335			struct sockaddr_in s4;
336			struct sockaddr_in6 s6;
337			} addr;
338			#endif
339
340			data = (bio_dgram_data *)b->ptr;
341
342			switch (cmd) {
343			case BIO_CTRL_RESET:
344			num = 0;
345			case BIO_C_FILE_SEEK:
346			ret = 0;
347			break;
348			case BIO_C_FILE_TELL:
349			case BIO_CTRL_INFO:
350			ret = 0;
351			break;
352			case BIO_C_SET_FD:
353			dgram_clear(b);
354			b->num= ((int )ptr);
355			b->shutdown = (int)num;
356			b->init = 1;
357			break;
358			case BIO_C_GET_FD:
359			if (b->init) {
360			ip = (int *)ptr;
361			if (ip != NULL)
362			*ip = b->num;
363			ret = b->num;
364			} else
365			ret = -1;
366			break;
367			case BIO_CTRL_GET_CLOSE:
368			ret = b->shutdown;
369			break;
370			case BIO_CTRL_SET_CLOSE:
371			b->shutdown = (int)num;
372			break;
373			case BIO_CTRL_PENDING:
374			case BIO_CTRL_WPENDING:
375			ret = 0;
376			break;
377			case BIO_CTRL_DUP:
378			case BIO_CTRL_FLUSH:
379			ret = 1;
380			break;
381			case BIO_CTRL_DGRAM_CONNECT:
382			to = (struct sockaddr *)ptr;
383			switch (to->sa_family) {
384			case AF_INET:
385			memcpy(&data->peer, to, sizeof(data->peer.sa_in));
386			break;
387			case AF_INET6:
388			memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
389			break;
390			default:
391			memcpy(&data->peer, to, sizeof(data->peer.sa));
392			break;
393			}
394			break;
395			/* (Linux)kernel sets DF bit on outgoing IP packets */
396			case BIO_CTRL_DGRAM_MTU_DISCOVER:
397			#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
398			addr_len = (socklen_t)sizeof(addr);
399			memset((void *)&addr, 0, sizeof(addr));
400			if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
401			ret = 0;
402			break;
403			}
404			switch (addr.sa.sa_family) {
405			case AF_INET:
406			sockopt_val = IP_PMTUDISC_DO;
407			ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
408			&sockopt_val, sizeof(sockopt_val));
409			if (ret < 0)
410			perror("setsockopt");
411			break;
412			#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
413			case AF_INET6:
414			sockopt_val = IPV6_PMTUDISC_DO;
415			ret = setsockopt(b->num, IPPROTO_IPV6,
416			IPV6_MTU_DISCOVER, &sockopt_val,
417			sizeof(sockopt_val));
418			if (ret < 0)
419			perror("setsockopt");
420			break;
421			#endif
422			default:
423			ret = -1;
424			break;
425			}
426			#else
427			ret = -1;
428			#endif
429			break;
430			case BIO_CTRL_DGRAM_QUERY_MTU:
431			#if defined(IP_MTU)
432			addr_len = (socklen_t)sizeof(addr);
433			memset((void *)&addr, 0, sizeof(addr));
434			if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
435			ret = 0;
436			break;
437			}
438			sockopt_len = sizeof(sockopt_val);
439			switch (addr.sa.sa_family) {
440			case AF_INET:
441			ret = getsockopt(b->num, IPPROTO_IP, IP_MTU,
442			&sockopt_val, &sockopt_len);
443			if (ret < 0 \|\| sockopt_val < 0) {
444			ret = 0;
445			} else {
446			/* we assume that the transport protocol is UDP and no
447			* IP options are used.
448			*/
449			data->mtu = sockopt_val - 8 - 20;
450			ret = data->mtu;
451			}
452			break;
453			#if defined(IPV6_MTU)
454			case AF_INET6:
455			ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
456			&sockopt_val, &sockopt_len);
457			if (ret < 0 \|\| sockopt_val < 0) {
458			ret = 0;
459			} else {
460			/* we assume that the transport protocol is UDP and no
461			* IPV6 options are used.
462			*/
463			data->mtu = sockopt_val - 8 - 40;
464			ret = data->mtu;
465			}
466			break;
467			#endif
468			default:
469			ret = 0;
470			break;
471			}
472			#else
473			ret = 0;
474			#endif
475			break;
476			case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
477			switch (data->peer.sa.sa_family) {
478			case AF_INET:
479			ret = 576 - 20 - 8;
480			break;
481			case AF_INET6:
482			#ifdef IN6_IS_ADDR_V4MAPPED
483			if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
484			ret = 576 - 20 - 8;
485			else
486			#endif
487			ret = 1280 - 40 - 8;
488			break;
489			default:
490			ret = 576 - 20 - 8;
491			break;
492			}
493			break;
494			case BIO_CTRL_DGRAM_GET_MTU:
495			return data->mtu;
496			break;
497			case BIO_CTRL_DGRAM_SET_MTU:
498			data->mtu = num;
499			ret = num;
500			break;
501			case BIO_CTRL_DGRAM_SET_CONNECTED:
502			to = (struct sockaddr *)ptr;
503
504			if (to != NULL) {
505			data->connected = 1;
506			switch (to->sa_family) {
507			case AF_INET:
508			memcpy(&data->peer, to, sizeof(data->peer.sa_in));
509			break;
510			case AF_INET6:
511			memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
512			break;
513			default:
514			memcpy(&data->peer, to, sizeof(data->peer.sa));
515			break;
516			}
517			} else {
518			data->connected = 0;
519			memset(&(data->peer), 0, sizeof(data->peer));
520			}
521			break;
522			case BIO_CTRL_DGRAM_GET_PEER:
523			switch (data->peer.sa.sa_family) {
524			case AF_INET:
525			ret = sizeof(data->peer.sa_in);
526			break;
527			case AF_INET6:
528			ret = sizeof(data->peer.sa_in6);
529			break;
530			default:
531			ret = sizeof(data->peer.sa);
532			break;
533			}
534			if (num == 0 \|\| num > ret)
535			num = ret;
536			memcpy(ptr, &data->peer, (ret = num));
537			break;
538			case BIO_CTRL_DGRAM_SET_PEER:
539			to = (struct sockaddr *) ptr;
540			switch (to->sa_family) {
541			case AF_INET:
542			memcpy(&data->peer, to, sizeof(data->peer.sa_in));
543			break;
544			case AF_INET6:
545			memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
546			break;
547			default:
548			memcpy(&data->peer, to, sizeof(data->peer.sa));
549			break;
550			}
551			break;
552			case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
553			memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
554			break;
555			#if defined(SO_RCVTIMEO)
556			case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
557			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
558			sizeof(struct timeval)) < 0) {
559			perror("setsockopt");
560			ret = -1;
561			}
562			break;
563			case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
564			{
565			socklen_t sz = sizeof(struct timeval);
566			if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
567			ptr, &sz) < 0) {
568			perror("getsockopt");
569			ret = -1;
570			} else
571			ret = sz;
572			}
573			break;
574			#endif
575			#if defined(SO_SNDTIMEO)
576			case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
577			if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
578			sizeof(struct timeval)) < 0) {
579			perror("setsockopt");
580			ret = -1;
581			}
582			break;
583			case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
584			{
585			socklen_t sz = sizeof(struct timeval);
586			if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
587			ptr, &sz) < 0) {
588			perror("getsockopt");
589			ret = -1;
590			} else
591			ret = sz;
592			}
593			break;
594			#endif
595			case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
596			/* fall-through */
597			case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
598			if (data->_errno == EAGAIN) {
599			ret = 1;
600			data->_errno = 0;
601			} else
602			ret = 0;
603			break;
604			#ifdef EMSGSIZE
605			case BIO_CTRL_DGRAM_MTU_EXCEEDED:
606			if (data->_errno == EMSGSIZE) {
607			ret = 1;
608			data->_errno = 0;
609			} else
610			ret = 0;
611			break;
612			#endif
613			default:
614			ret = 0;
615			break;
616			}
617			return (ret);
618			}
619
620			static int
621			dgram_puts(BIO bp, const char str)
622			{
623			int n, ret;
624
625			n = strlen(str);
626			ret = dgram_write(bp, str, n);
627			return (ret);
628			}
629
630
631			static int
632			BIO_dgram_should_retry(int i)
633			{
634			int err;
635
636			if ((i == 0) \|\| (i == -1)) {
637			err = errno;
638			return (BIO_dgram_non_fatal_error(err));
639			}
640			return (0);
641			}
642
643			int
644			BIO_dgram_non_fatal_error(int err)
645			{
646			switch (err) {
647			case EINTR:
648			case EAGAIN:
649			case EINPROGRESS:
650			case EALREADY:
651			return (1);
652			default:
653			break;
654			}
655			return (0);
656			}
657
658			#endif