1 /* $NetBSD: recvmsg.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <krb5/roken.h> 39 40 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL 41 recvmsg(int s, struct msghdr *msg, int flags) 42 { 43 ssize_t ret, nb; 44 size_t tot = 0; 45 int i; 46 char *buf, *p; 47 struct iovec *iov = msg->msg_iov; 48 49 for(i = 0; i < msg->msg_iovlen; ++i) 50 tot += iov[i].iov_len; 51 buf = malloc(tot); 52 if (tot != 0 && buf == NULL) { 53 errno = ENOMEM; 54 return -1; 55 } 56 nb = ret = recvfrom (s, buf, tot, flags, msg->msg_name, &msg->msg_namelen); 57 p = buf; 58 while (nb > 0) { 59 ssize_t cnt = min(nb, iov->iov_len); 60 61 memcpy (iov->iov_base, p, cnt); 62 p += cnt; 63 nb -= cnt; 64 ++iov; 65 } 66 free(buf); 67 return ret; 68 } 69