1/*
2 * Copyright (c) 2016 Boris Astardzhiev, Smartcom-Bulgaria AD
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice(s), this list of conditions and the following disclaimer as
10 *    the first lines of this file unmodified other than the possible
11 *    addition of one or more copyright notices.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice(s), this list of conditions and the following disclaimer in
14 *    the documentation and/or other materials provided with the
15 *    distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: releng/11.0/lib/libc/gen/sendmmsg.c 295039 2016-01-29 14:12:12Z kib $");
32
33#include <sys/types.h>
34#include <sys/socket.h>
35#include "libc_private.h"
36
37ssize_t
38sendmmsg(int s, struct mmsghdr *__restrict msgvec, size_t vlen, int flags)
39{
40	size_t i, sent;
41	ssize_t ret;
42
43	sent = 0;
44	for (i = 0; i < vlen; i++, sent++) {
45		ret = __sys_sendmsg(s, &msgvec[i].msg_hdr, flags);
46		if (ret == -1) {
47			if (sent != 0) {
48				/*
49				 * We have sent messages. Let caller
50				 * know about the data sent, socket
51				 * error is returned on next
52				 * invocation.
53				 */
54				return (sent);
55			}
56			return (ret);
57		}
58
59		/* Save sent bytes. */
60		msgvec[i].msg_len = ret;
61	}
62
63	return (sent);
64}
65