stream/write.c File Reference

#include <openssl/err.h>
#include <openssl/ssl.h>
#include <unistd.h>
#include <errno.h>
#include "stream.h"
#include "logger.h"

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Functions
ssize_t	streamWrite (Stream this, void *buf, size_t count)

Variables
Logger	logger

Detailed Description

Author

Georg Hopp

Copyright

Copyright © 2012 Georg Hopp

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file stream/write.c.

Function Documentation

ssize_t streamWrite	(	Stream	this,
		void *	buf,
		size_t	count
	)

Todo:

I got a segfault in this call under unclear circumstances. Most likely it has to do with a write on a closed connection.

Definition at line 35 of file stream/write.c.

References logger, LOGGER_DEBUG, loggerLog(), STREAM_FD, and STREAM_SSL.

Referenced by httpWriterWrite().

{
    ssize_t done;

    switch(this->type) {
        ssize_t written;

        case STREAM_FD:
            written = write((this->handle).fd, buf, count);

            if (written < 0) {
                switch (errno) {
                    case EINTR:
                    case ENOBUFS:
                    case ENOMEM:
                        done = 0;
                        break;
                    case (EAGAIN|EWOULDBLOCK):
                        done = -1;
                        break;
                    default:
                        done = -2;
                        break;
                }
            } else {
                done = written;
            }

            break;

        case STREAM_SSL:
            /**
             * \todo I got a segfault in this call under unclear 
             * circumstances. Most likely it has to do with a
             * write on a closed connection.
             */
            done = SSL_write((this->handle).ssl, buf, count);

            if (0 == done) {
                done = -2;
            } else if (0 > done) {
                switch (SSL_get_error((this->handle).ssl, done)) {
                    case SSL_ERROR_SYSCALL:
                        {
                            switch (errno) {
                                case EINTR:
                                case ENOBUFS:
                                case ENOMEM:
                                    done = 0;
                                    break;
                                case (EAGAIN|EWOULDBLOCK):
                                    done = -1;
                                    break;
                                default:
                                    done = -2;
                                    break;
                            }
                        }
                        break;

                    case SSL_ERROR_SSL:
                        {
                            unsigned long err;

                            while (0 != (err = ERR_get_error())) {
                                loggerLog(
                                        logger,
                                        LOGGER_DEBUG,
                                        ERR_error_string(err, NULL));
                            }
                        }
                        // DROP THROUGH

                    case SSL_ERROR_ZERO_RETURN:
                        done = -2;
                        break;
                }
            }

            break;

        default:
            done = -2;
            break;
    }

    return done;
}

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Variable Documentation

Logger logger

Definition at line 66 of file taskrambler.c.

Referenced by main(), and streamWrite().