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98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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* Copyright (c) 2016 Boris Astardzhiev, Smartcom-Bulgaria AD
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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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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <poll.h>
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#include <stddef.h>
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#include "libc_private.h"
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ssize_t
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recvmmsg(int s, struct mmsghdr *__restrict msgvec, size_t vlen, int flags,
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const struct timespec *__restrict timeout)
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{
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struct pollfd pfd[1];
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size_t i, rcvd;
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ssize_t ret;
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int res;
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short ev;
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if (timeout != NULL) {
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pfd[0].fd = s;
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pfd[0].revents = 0;
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pfd[0].events = ev = POLLIN | POLLRDNORM | POLLRDBAND |
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POLLPRI;
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res = ppoll(&pfd[0], 1, timeout, NULL);
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if (res == -1 || res == 0)
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return (res);
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if (pfd[0].revents & POLLNVAL) {
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errno = EBADF;
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return (-1);
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}
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if ((pfd[0].revents & ev) == 0) {
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errno = ETIMEDOUT;
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return (-1);
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}
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}
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ret = __sys_recvmsg(s, &msgvec[0].msg_hdr, flags);
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if (ret == -1)
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return (ret);
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msgvec[0].msg_len = ret;
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/*
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* Do non-blocking receive for second and later messages if
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* WAITFORONE is set.
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*/
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if (flags & MSG_WAITFORONE)
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flags |= MSG_DONTWAIT;
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rcvd = 1;
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for (i = rcvd; i < vlen; i++, rcvd++) {
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ret = __sys_recvmsg(s, &msgvec[i].msg_hdr, flags);
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if (ret == -1) {
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/* We have received messages. Let caller know
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* about the data received, socket error is
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* returned on next invocation.
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*/
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return (rcvd);
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}
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/* Save received bytes. */
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msgvec[i].msg_len = ret;
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}
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return (rcvd);
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}
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