bss_dgram.c
/* crypto/bio/bio_dgram.c */
/*
* 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 <stdio.h>
#include <errno.h>
#define USE_SOCKETS
#include "cryptlib.h"
#include <openssl/bio.h>
#ifndef OPENSSL_NO_DGRAM
# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
# include <sys/timeb.h>
# endif
# ifdef OPENSSL_SYS_LINUX
# define IP_MTU 14 /* linux is lame */
# 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 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 void get_current_time(struct timeval *t);
static BIO_METHOD methods_dgramp = {
BIO_TYPE_DGRAM,
"datagram socket",
dgram_write,
dgram_read,
dgram_puts,
NULL, /* dgram_gets, */
dgram_ctrl,
dgram_new,
dgram_free,
NULL,
};
typedef struct bio_dgram_data_st {
union {
struct sockaddr sa;
struct sockaddr_in sa_in;
# if OPENSSL_USE_IPV6
struct sockaddr_in6 sa_in6;
# endif
} 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 = OPENSSL_malloc(sizeof(bio_dgram_data));
if (data == NULL)
return 0;
memset(data, 0x00, sizeof(bio_dgram_data));
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;
if (data != NULL)
OPENSSL_free(data);
return (1);
}
static int dgram_clear(BIO *a)
{
if (a == NULL)
return (0);
if (a->shutdown) {
if (a->init) {
SHUTDOWN2(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;
union {
size_t s;
int i;
} sz = {
0
};
/* 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 */
# ifdef OPENSSL_SYS_WINDOWS
int timeout;
sz.i = sizeof(timeout);
if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
(void *)&timeout, &sz.i) < 0) {
perror("getsockopt");
} else {
data->socket_timeout.tv_sec = timeout / 1000;
data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
}
# else
sz.i = sizeof(data->socket_timeout);
if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
&(data->socket_timeout), (void *)&sz) < 0) {
perror("getsockopt");
} else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
# endif
/* Get current time */
get_current_time(&timenow);
/* 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)) {
# ifdef OPENSSL_SYS_WINDOWS
timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
(void *)&timeout, sizeof(timeout)) < 0) {
perror("setsockopt");
}
# else
if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
sizeof(struct timeval)) < 0) {
perror("setsockopt");
}
# endif
}
}
# 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) {
# ifdef OPENSSL_SYS_WINDOWS
int timeout = data->socket_timeout.tv_sec * 1000 +
data->socket_timeout.tv_usec / 1000;
if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
(void *)&timeout, sizeof(timeout)) < 0) {
perror("setsockopt");
}
# else
if (setsockopt
(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
sizeof(struct timeval)) < 0) {
perror("setsockopt");
}
# endif
}
# endif
}
static int dgram_read(BIO *b, char *out, int outl)
{
int ret = 0;
bio_dgram_data *data = (bio_dgram_data *)b->ptr;
struct {
/*
* See commentary in b_sock.c. <appro>
*/
union {
size_t s;
int i;
} len;
union {
struct sockaddr sa;
struct sockaddr_in sa_in;
# if OPENSSL_USE_IPV6
struct sockaddr_in6 sa_in6;
# endif
} peer;
} sa;
sa.len.s = 0;
sa.len.i = sizeof(sa.peer);
if (out != NULL) {
clear_socket_error();
memset(&sa.peer, 0x00, sizeof(sa.peer));
dgram_adjust_rcv_timeout(b);
ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
sa.len.i = (int)sa.len.s;
}
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 = get_last_socket_error();
}
}
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;
clear_socket_error();
if (data->connected)
ret = writesocket(b->num, in, inl);
else {
int peerlen = sizeof(data->peer);
if (data->peer.sa.sa_family == AF_INET)
peerlen = sizeof(data->peer.sa_in);
# if OPENSSL_USE_IPV6
else if (data->peer.sa.sa_family == AF_INET6)
peerlen = sizeof(data->peer.sa_in6);
# endif
# if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
# else
ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
# endif
}
BIO_clear_retry_flags(b);
if (ret <= 0) {
if (BIO_dgram_should_retry(ret)) {
BIO_set_retry_write(b);
data->_errno = get_last_socket_error();
# if 0 /* higher layers are responsible for querying
* MTU, if necessary */
if (data->_errno == EMSGSIZE)
/* retrieve the new MTU */
BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
# endif
}
}
return (ret);
}
static long dgram_get_mtu_overhead(bio_dgram_data *data)
{
long ret;
switch (data->peer.sa.sa_family) {
case AF_INET:
/*
* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
*/
ret = 28;
break;
# if OPENSSL_USE_IPV6
case AF_INET6:
# ifdef IN6_IS_ADDR_V4MAPPED
if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
/*
* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
*/
ret = 28;
else
# endif
/*
* Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
*/
ret = 48;
break;
# endif
default:
/* We don't know. Go with the historical default */
ret = 28;
break;
}
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(OPENSSL_SYS_LINUX) && (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;
# if OPENSSL_USE_IPV6
struct sockaddr_in6 s6;
# endif
} 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;
# if 0
if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
perror("connect");
ret = 0;
} else {
# endif
switch (to->sa_family) {
case AF_INET:
memcpy(&data->peer, to, sizeof(data->peer.sa_in));
break;
# if OPENSSL_USE_IPV6
case AF_INET6:
memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
break;
# endif
default:
memcpy(&data->peer, to, sizeof(data->peer.sa));
break;
}
# if 0
}
# endif
break;
/* (Linux)kernel sets DF bit on outgoing IP packets */
case BIO_CTRL_DGRAM_MTU_DISCOVER:
# if defined(OPENSSL_SYS_LINUX) && 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;
if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
&sockopt_val, sizeof(sockopt_val))) < 0)
perror("setsockopt");
break;
# if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
case AF_INET6:
sockopt_val = IPV6_PMTUDISC_DO;
if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
&sockopt_val, sizeof(sockopt_val))) < 0)
perror("setsockopt");
break;
# endif
default:
ret = -1;
break;
}
ret = -1;
# else
break;
# endif
case BIO_CTRL_DGRAM_QUERY_MTU:
# if defined(OPENSSL_SYS_LINUX) && 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:
if ((ret =
getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
&sockopt_len)) < 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 OPENSSL_USE_IPV6 && defined(IPV6_MTU)
case AF_INET6:
if ((ret =
getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
(void *)&sockopt_val, &sockopt_len)) < 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:
ret = -dgram_get_mtu_overhead(data);
switch (data->peer.sa.sa_family) {
case AF_INET:
ret += 576;
break;
# if OPENSSL_USE_IPV6
case AF_INET6:
# ifdef IN6_IS_ADDR_V4MAPPED
if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
ret += 576;
else
# endif
ret += 1280;
break;
# endif
default:
ret += 576;
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;
# if OPENSSL_USE_IPV6
case AF_INET6:
memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
break;
# endif
default:
memcpy(&data->peer, to, sizeof(data->peer.sa));
break;
}
} else {
data->connected = 0;
memset(&(data->peer), 0x00, 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;
# if OPENSSL_USE_IPV6
case AF_INET6:
ret = sizeof(data->peer.sa_in6);
break;
# endif
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;
# if OPENSSL_USE_IPV6
case AF_INET6:
memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
break;
# endif
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:
# ifdef OPENSSL_SYS_WINDOWS
{
struct timeval *tv = (struct timeval *)ptr;
int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
(void *)&timeout, sizeof(timeout)) < 0) {
perror("setsockopt");
ret = -1;
}
}
# else
if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
sizeof(struct timeval)) < 0) {
perror("setsockopt");
ret = -1;
}
# endif
break;
case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
{
union {
size_t s;
int i;
} sz = {
0
};
# ifdef OPENSSL_SYS_WINDOWS
int timeout;
struct timeval *tv = (struct timeval *)ptr;
sz.i = sizeof(timeout);
if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
(void *)&timeout, &sz.i) < 0) {
perror("getsockopt");
ret = -1;
} else {
tv->tv_sec = timeout / 1000;
tv->tv_usec = (timeout % 1000) * 1000;
ret = sizeof(*tv);
}
# else
sz.i = sizeof(struct timeval);
if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
ptr, (void *)&sz) < 0) {
perror("getsockopt");
ret = -1;
} else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
OPENSSL_assert(sz.s <= sizeof(struct timeval));
ret = (int)sz.s;
} else
ret = sz.i;
# endif
}
break;
# endif
# if defined(SO_SNDTIMEO)
case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
# ifdef OPENSSL_SYS_WINDOWS
{
struct timeval *tv = (struct timeval *)ptr;
int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
(void *)&timeout, sizeof(timeout)) < 0) {
perror("setsockopt");
ret = -1;
}
}
# else
if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
sizeof(struct timeval)) < 0) {
perror("setsockopt");
ret = -1;
}
# endif
break;
case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
{
union {
size_t s;
int i;
} sz = {
0
};
# ifdef OPENSSL_SYS_WINDOWS
int timeout;
struct timeval *tv = (struct timeval *)ptr;
sz.i = sizeof(timeout);
if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
(void *)&timeout, &sz.i) < 0) {
perror("getsockopt");
ret = -1;
} else {
tv->tv_sec = timeout / 1000;
tv->tv_usec = (timeout % 1000) * 1000;
ret = sizeof(*tv);
}
# else
sz.i = sizeof(struct timeval);
if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
ptr, (void *)&sz) < 0) {
perror("getsockopt");
ret = -1;
} else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
OPENSSL_assert(sz.s <= sizeof(struct timeval));
ret = (int)sz.s;
} else
ret = sz.i;
# endif
}
break;
# endif
case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
/* fall-through */
case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
# ifdef OPENSSL_SYS_WINDOWS
if (data->_errno == WSAETIMEDOUT)
# else
if (data->_errno == EAGAIN)
# endif
{
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
case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
ret = dgram_get_mtu_overhead(data);
break;
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 = get_last_socket_error();
# if defined(OPENSSL_SYS_WINDOWS)
/*
* If the socket return value (i) is -1 and err is unexpectedly 0 at
* this point, the error code was overwritten by another system call
* before this error handling is called.
*/
# endif
return (BIO_dgram_non_fatal_error(err));
}
return (0);
}
int BIO_dgram_non_fatal_error(int err)
{
switch (err) {
# if defined(OPENSSL_SYS_WINDOWS)
# if defined(WSAEWOULDBLOCK)
case WSAEWOULDBLOCK:
# endif
# if 0 /* This appears to always be an error */
# if defined(WSAENOTCONN)
case WSAENOTCONN:
# endif
# endif
# endif
# ifdef EWOULDBLOCK
# ifdef WSAEWOULDBLOCK
# if WSAEWOULDBLOCK != EWOULDBLOCK
case EWOULDBLOCK:
# endif
# else
case EWOULDBLOCK:
# endif
# endif
# ifdef EINTR
case EINTR:
# endif
# ifdef EAGAIN
# if EWOULDBLOCK != EAGAIN
case EAGAIN:
# endif
# endif
# ifdef EPROTO
case EPROTO:
# endif
# ifdef EINPROGRESS
case EINPROGRESS:
# endif
# ifdef EALREADY
case EALREADY:
# endif
return (1);
/* break; */
default:
break;
}
return (0);
}
static void get_current_time(struct timeval *t)
{
# ifdef OPENSSL_SYS_WIN32
struct _timeb tb;
_ftime(&tb);
t->tv_sec = (long)tb.time;
t->tv_usec = (long)tb.millitm * 1000;
# 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
}
#endif
