05781f22ab
12826c9586
("Handle partial writes on non-blocking sockets") introduced
unconditional use of 'use_write' which is only declared if
defined(SOCKET_IS_NOT_AN_FD).
Change-Id: I0c43ed44a86b4f245acba849afabeb9ce739d0e5
135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "roken.h"
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/*
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* Like write but blocking sockets never return partial data, i.e. we retry on
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* EINTR. With non-blocking sockets (EWOULDBLOCK or EAGAIN) we return the
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* number of bytes written.
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*/
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#ifndef _WIN32
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ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
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net_write (rk_socket_t fd, const void *buf, size_t nbytes)
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{
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const char *cbuf = (const char *)buf;
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ssize_t count;
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size_t rem = nbytes;
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while (rem > 0) {
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count = write (fd, cbuf, rem);
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if (count < 0) {
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switch (errno) {
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case EINTR:
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continue;
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#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
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case EAGAIN:
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#endif
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case EWOULDBLOCK:
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return nbytes - rem;
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default:
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return count;
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}
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}
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cbuf += count;
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rem -= count;
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}
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return nbytes;
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}
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#else /* defined(_WIN32) */
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ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
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net_write(rk_socket_t sock, const void *buf, size_t nbytes)
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{
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const char *cbuf = (const char *)buf;
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ssize_t count;
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size_t rem = nbytes;
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#ifdef SOCKET_IS_NOT_AN_FD
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int use_write = 0;
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#endif
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while (rem > 0) {
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#ifdef SOCKET_IS_NOT_AN_FD
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if (use_write)
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count = _write (sock, cbuf, rem);
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else
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count = send (sock, cbuf, rem, 0);
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if (use_write == 0 &&
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rk_IS_SOCKET_ERROR(count) &&
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(rk_SOCK_ERRNO == WSANOTINITIALISED ||
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rk_SOCK_ERRNO == WSAENOTSOCK)) {
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use_write = 1;
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count = _write (sock, cbuf, rem);
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}
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#else
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count = send (sock, cbuf, rem, 0);
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#endif
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if (count < 0) {
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#ifdef SOCKET_IS_NOT_AN_FD
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if (!use_write) {
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switch (rk_SOCK_ERRNO) {
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case WSAEINTR:
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continue;
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case WSAEWOULDBLOCK:
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return nbytes - rem;
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default:
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return count;
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}
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} else
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#endif
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{
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switch (errno) {
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case EINTR:
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continue;
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case EWOULDBLOCK:
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return nbytes - rem;
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default:
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return count;
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}
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}
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}
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cbuf += count;
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rem -= count;
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}
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return nbytes;
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}
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#endif
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