sendrecv.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2001 The Apache Software Foundation.  All rights
 * reserved.
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 * 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.
 *
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 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#include "apr_private.h"
#if BEOS_BONE /* BONE uses the unix code - woohoo */
#include "../unix/sendrecv.c"
#else
#include "networkio.h"

static apr_status_t wait_for_io_or_timeout(apr_socket_t *sock, int for_read)
{
    struct timeval tv, *tvptr;
    fd_set fdset;
    int srv;

    do {
        FD_ZERO(&fdset);
        FD_SET(sock->socketdes, &fdset);
        if (sock->timeout < 0) {
            tvptr = NULL;
        }
        else {
            tv.tv_sec = sock->timeout / APR_USEC_PER_SEC;
            tv.tv_usec = sock->timeout % APR_USEC_PER_SEC;
            tvptr = &tv;
        }
        srv = select(sock->socketdes + 1,
            for_read ? &fdset : NULL,
            for_read ? NULL : &fdset, 
            NULL,
            tvptr);
            /* TODO - timeout should be smaller on repeats of this loop */
    } while (srv == -1 && errno == EINTR);

    if (srv == 0) {
        return APR_TIMEUP;
    }
    else if (srv < 0) {
        return errno;
    }
    return APR_SUCCESS;
}

apr_status_t apr_send(apr_socket_t *sock, const char *buf, apr_size_t *len)
{
    ssize_t rv;
	
    do {
        rv = send(sock->socketdes, buf, (*len), 0);
    } while (rv == -1 && errno == EINTR);

    if (rv == -1 && errno == EWOULDBLOCK && sock->timeout > 0) {
        apr_status_t arv = wait_for_io_or_timeout(sock, 0);
        if (arv != APR_SUCCESS) {
            *len = 0;
            return arv;
        }
        else {
            do {
                rv = send(sock->socketdes, buf, (*len), 0);
            } while (rv == -1 && errno == EINTR);
        }
    }
    if (rv == -1) {
        *len = 0;
        return errno;
    }
    (*len) = rv;

    return APR_SUCCESS;
}

apr_status_t apr_recv(apr_socket_t *sock, char *buf, apr_size_t *len)
{
    apr_ssize_t rv;
   
    do {
        rv = recv(sock->socketdes, buf, (*len), 0);
    } while (rv == -1 && errno == EINTR);

    if (rv == -1 && errno == EWOULDBLOCK && sock->timeout > 0) {
        apr_status_t arv = wait_for_io_or_timeout(sock, 1);
        if (arv != APR_SUCCESS) {
            *len = 0;
            return arv;
        }
        else {
            do {
                rv = recv(sock->socketdes, buf, (*len), 0);
            } while (rv == -1 && errno == EINTR);
        }
    }
    if (rv == -1) {
        (*len) = 0;
        return errno;
    }
    (*len) = rv;
    if (rv == 0)
        return APR_EOF;
    return APR_SUCCESS;
}

/* BeOS doesn't have writev for sockets so we use the following instead...
 */
apr_status_t apr_sendv(apr_socket_t * sock, const struct iovec *vec,
                     apr_int32_t nvec, apr_size_t *len)
{
    *len = vec[0].iov_len;
    return apr_send(sock, vec[0].iov_base, len);
}

apr_status_t apr_sendto(apr_socket_t *sock, apr_sockaddr_t *where,
                        apr_int32_t flags, const char *buf, apr_size_t *len)
{
    ssize_t rv;

    do {
        rv = sendto(sock->socketdes, buf, (*len), flags,
                    (const struct sockaddr*)&where->sa,
                    where->salen);
    } while (rv == -1 && errno == EINTR);

    if (rv == -1 && (errno == EAGAIN || errno == EWOULDBLOCK)
        && sock->timeout != 0) {
        apr_status_t arv = wait_for_io_or_timeout(sock, 0);
        if (arv != APR_SUCCESS) {
            *len = 0;
            return arv;
        } else {
            do {
                rv = sendto(sock->socketdes, buf, (*len), flags,
                            (const struct sockaddr*)&where->sa,
                            where->salen);
            } while (rv == -1 && errno == EINTR);
        }
    }
    if (rv == -1) {
        *len = 0;
        return errno;
    }
    *len = rv;
    return APR_SUCCESS;
}

apr_status_t apr_recvfrom(apr_sockaddr_t *from, apr_socket_t *sock,
                          apr_int32_t flags, char *buf,
                          apr_size_t *len)
{
    ssize_t rv;

    if (from == NULL){
        return APR_ENOMEM;
        /* Not sure if this is correct.  Maybe we should just allocate
           the memory??
         */
    }

    do {
        rv = recvfrom(sock->socketdes, buf, (*len), flags,
                      (struct sockaddr*)&from->sa, &from->salen);
    } while (rv == -1 && errno == EINTR);

    if (rv == -1 && (errno == EAGAIN || errno == EWOULDBLOCK) &&
        sock->timeout != 0) {
        apr_status_t arv = wait_for_io_or_timeout(sock, 1);
        if (arv != APR_SUCCESS) {
            *len = 0;
            return arv;
        } else {
            do {
                rv = recvfrom(sock->socketdes, buf, (*len), flags,
                              (struct sockaddr*)&from->sa, &from->salen);
                } while (rv == -1 && errno == EINTR);
        }
    }
    if (rv == -1) {
        (*len) = 0;
        return errno;
    }

    (*len) = rv;
    if (rv == 0)
        return APR_EOF;

    return APR_SUCCESS;
}

#endif