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117 lines
2.3 KiB
117 lines
2.3 KiB
/**
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* \file
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*
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* \author Georg Hopp
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*
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* \copyright
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* Copyright © 2014 Georg Hopp
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "tr/stream.h"
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#include "tr/logger.h"
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ssize_t
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TR_streamRead(TR_Stream this, void * buf, size_t count)
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{
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ssize_t done;
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switch(this->type) {
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ssize_t _read;
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case TR_STREAM_FD:
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_read = read((this->handle).fd, buf, count);
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if (_read < 0) {
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switch (errno) {
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case EINTR:
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case ENOMEM:
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done = 0;
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break;
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case (EAGAIN|EWOULDBLOCK):
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done = -1;
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break;
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default:
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done = -2;
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break;
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}
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} else if (_read == 0) {
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done = -2;
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} else {
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done = _read;
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}
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break;
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case TR_STREAM_SSL:
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done = SSL_read((this->handle).ssl, buf, count);
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if (0 == done) {
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done = -2;
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} else if (0 > done) {
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switch (SSL_get_error((this->handle).ssl, done)) {
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case SSL_ERROR_SYSCALL:
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{
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switch (errno) {
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case EINTR:
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case ENOBUFS:
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case ENOMEM:
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done = 0;
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break;
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case (EAGAIN|EWOULDBLOCK):
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done = -1;
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break;
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default:
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done = -1;
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break;
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}
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}
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break;
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case SSL_ERROR_SSL:
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{
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unsigned long err;
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while (0 != (err = ERR_get_error())) {
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TR_loggerLog(
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TR_logger,
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TR_LOGGER_DEBUG,
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ERR_error_string(err, NULL));
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}
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}
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// DROP THROUGH
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case SSL_ERROR_ZERO_RETURN:
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done = -2;
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break;
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}
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}
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break;
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default:
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done = -2;
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break;
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}
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return done;
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}
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// vim: set ts=4 sw=4:
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