xref: /freebsd-src/lib/libsys/sendmmsg.c (revision 29d079c9649174a36a87a26d1f99e3c0b3e78e0c)
1*29d079c9SBrooks Davis /*
2*29d079c9SBrooks Davis  * Copyright (c) 2016 Boris Astardzhiev, Smartcom-Bulgaria AD
3*29d079c9SBrooks Davis  * All rights reserved.
4*29d079c9SBrooks Davis  *
5*29d079c9SBrooks Davis  * Redistribution and use in source and binary forms, with or without
6*29d079c9SBrooks Davis  * modification, are permitted provided that the following conditions
7*29d079c9SBrooks Davis  * are met:
8*29d079c9SBrooks Davis  * 1. Redistributions of source code must retain the above copyright
9*29d079c9SBrooks Davis  *    notice(s), this list of conditions and the following disclaimer as
10*29d079c9SBrooks Davis  *    the first lines of this file unmodified other than the possible
11*29d079c9SBrooks Davis  *    addition of one or more copyright notices.
12*29d079c9SBrooks Davis  * 2. Redistributions in binary form must reproduce the above copyright
13*29d079c9SBrooks Davis  *    notice(s), this list of conditions and the following disclaimer in
14*29d079c9SBrooks Davis  *    the documentation and/or other materials provided with the
15*29d079c9SBrooks Davis  *    distribution.
16*29d079c9SBrooks Davis  *
17*29d079c9SBrooks Davis  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
18*29d079c9SBrooks Davis  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*29d079c9SBrooks Davis  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20*29d079c9SBrooks Davis  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
21*29d079c9SBrooks Davis  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22*29d079c9SBrooks Davis  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23*29d079c9SBrooks Davis  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24*29d079c9SBrooks Davis  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25*29d079c9SBrooks Davis  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26*29d079c9SBrooks Davis  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27*29d079c9SBrooks Davis  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*29d079c9SBrooks Davis  */
29*29d079c9SBrooks Davis 
30*29d079c9SBrooks Davis #include <sys/types.h>
31*29d079c9SBrooks Davis #include <sys/socket.h>
32*29d079c9SBrooks Davis #include "libc_private.h"
33*29d079c9SBrooks Davis 
34*29d079c9SBrooks Davis ssize_t
sendmmsg(int s,struct mmsghdr * __restrict msgvec,size_t vlen,int flags)35*29d079c9SBrooks Davis sendmmsg(int s, struct mmsghdr *__restrict msgvec, size_t vlen, int flags)
36*29d079c9SBrooks Davis {
37*29d079c9SBrooks Davis 	size_t i, sent;
38*29d079c9SBrooks Davis 	ssize_t ret;
39*29d079c9SBrooks Davis 
40*29d079c9SBrooks Davis 	sent = 0;
41*29d079c9SBrooks Davis 	for (i = 0; i < vlen; i++, sent++) {
42*29d079c9SBrooks Davis 		ret = __sys_sendmsg(s, &msgvec[i].msg_hdr, flags);
43*29d079c9SBrooks Davis 		if (ret == -1) {
44*29d079c9SBrooks Davis 			if (sent != 0) {
45*29d079c9SBrooks Davis 				/*
46*29d079c9SBrooks Davis 				 * We have sent messages. Let caller
47*29d079c9SBrooks Davis 				 * know about the data sent, socket
48*29d079c9SBrooks Davis 				 * error is returned on next
49*29d079c9SBrooks Davis 				 * invocation.
50*29d079c9SBrooks Davis 				 */
51*29d079c9SBrooks Davis 				return (sent);
52*29d079c9SBrooks Davis 			}
53*29d079c9SBrooks Davis 			return (ret);
54*29d079c9SBrooks Davis 		}
55*29d079c9SBrooks Davis 
56*29d079c9SBrooks Davis 		/* Save sent bytes. */
57*29d079c9SBrooks Davis 		msgvec[i].msg_len = ret;
58*29d079c9SBrooks Davis 	}
59*29d079c9SBrooks Davis 
60*29d079c9SBrooks Davis 	return (sent);
61*29d079c9SBrooks Davis }
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