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/*
* Portions created by Alan Antonuk are Copyright (c) 2017 Alan Antonuk.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "amqp_openssl_bio.h"
#include "amqp_socket.h"
#include "threads.h"
#include <errno.h>
#if ((defined(_WIN32)) || (defined(__MINGW32__)) || (defined(__MINGW64__)))
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# endif
# include <winsock2.h>
#else
# include <sys/types.h>
# include <sys/socket.h>
#endif
#ifdef MSG_NOSIGNAL
# define AMQP_USE_AMQP_BIO
#endif
#ifdef AMQP_USE_AMQP_BIO
#ifdef ENABLE_THREAD_SAFETY
static pthread_once_t bio_init_once = PTHREAD_ONCE_INIT;
#endif
static int bio_initialized = 0;
static BIO_METHOD amqp_bio_method;
static int amqp_openssl_bio_should_retry(int res) {
if (res == -1) {
int err = amqp_os_socket_error();
if (
#ifdef EWOULDBLOCK
err == EWOULDBLOCK ||
#endif
#ifdef WSAEWOULDBLOCK
err == WSAEWOULDBLOCK ||
#endif
#ifdef ENOTCONN
err == ENOTCONN ||
#endif
#ifdef EINTR
err == EINTR ||
#endif
#ifdef EAGAIN
err == EAGAIN ||
#endif
#ifdef EPROTO
err == EPROTO ||
#endif
#ifdef EINPROGRESS
err == EINPROGRESS ||
#endif
#ifdef EALREADY
err == EALREADY ||
#endif
0) {
return 1;
}
}
return 0;
}
static int amqp_openssl_bio_write(BIO* b, const char *in, int inl) {
int flags = 0;
int fd;
int res;
#ifdef MSG_NOSIGNAL
flags |= MSG_NOSIGNAL;
#endif
BIO_get_fd(b, &fd);
res = send(fd, in, inl, flags);
BIO_clear_retry_flags(b);
if (res <= 0 && amqp_openssl_bio_should_retry(res)) {
BIO_set_retry_write(b);
}
return res;
}
static int amqp_openssl_bio_read(BIO* b, char* out, int outl) {
int flags = 0;
int fd;
int res;
#ifdef MSG_NOSIGNAL
flags |= MSG_NOSIGNAL;
#endif
BIO_get_fd(b, &fd);
res = recv(fd, out, outl, flags);
BIO_clear_retry_flags(b);
if (res <= 0 && amqp_openssl_bio_should_retry(res)) {
BIO_set_retry_read(b);
}
return res;
}
#if (OPENSSL_VERSION_NUMBER < 0x10100000L)
static int BIO_meth_set_write(BIO_METHOD *biom,
int (*wfn)(BIO *, const char *, int)) {
biom->bwrite = wfn;
return 0;
}
static int BIO_meth_set_read(BIO_METHOD *biom,
int (*rfn)(BIO *, char *, int)) {
biom->bread = rfn;
return 0;
}
#endif
static void amqp_openssl_bio_init(void) {
memcpy(&amqp_bio_method, BIO_s_socket(), sizeof(amqp_bio_method));
BIO_meth_set_write(&amqp_bio_method, amqp_openssl_bio_write);
BIO_meth_set_read(&amqp_bio_method, amqp_openssl_bio_read);
bio_initialized = 1;
}
#endif /* AMQP_USE_AMQP_BIO */
BIO_METHOD* amqp_openssl_bio(void) {
#ifdef AMQP_USE_AMQP_BIO
if (!bio_initialized) {
#ifdef ENABLE_THREAD_SAFETY
pthread_once(&bio_init_once, amqp_openssl_bio_init);
#else
amqp_openssl_bio_init();
#endif /* ifndef ENABLE_THREAD_SAFETY */
}
return &amqp_bio_method;
#else
return BIO_s_socket();
#endif
}
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