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/types.h> 31 #include <sys/socket.h> 32 #include "libc_private.h" 33 34 ssize_t 35 sendmmsg(int s, struct mmsghdr *__restrict msgvec, size_t vlen, int flags) 36 { 37 size_t i, sent; 38 ssize_t ret; 39 40 sent = 0; 41 for (i = 0; i < vlen; i++, sent++) { 42 ret = __sys_sendmsg(s, &msgvec[i].msg_hdr, flags); 43 if (ret == -1) { 44 if (sent != 0) { 45 /* 46 * We have sent messages. Let caller 47 * know about the data sent, socket 48 * error is returned on next 49 * invocation. 50 */ 51 return (sent); 52 } 53 return (ret); 54 } 55 56 /* Save sent bytes. */ 57 msgvec[i].msg_len = ret; 58 } 59 60 return (sent); 61 } 62