1 /* $NetBSD: sendmsg.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Hgskolan 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 #ifndef _WIN32 41 42 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL 43 sendmsg(rk_socket_t s, const struct msghdr *msg, int flags) 44 { 45 ssize_t ret; 46 size_t tot = 0; 47 int i; 48 char *buf, *p; 49 struct iovec *iov = msg->msg_iov; 50 51 for(i = 0; i < msg->msg_iovlen; ++i) 52 tot += iov[i].iov_len; 53 buf = malloc(tot); 54 if (tot != 0 && buf == NULL) { 55 errno = ENOMEM; 56 return -1; 57 } 58 p = buf; 59 for (i = 0; i < msg->msg_iovlen; ++i) { 60 memcpy (p, iov[i].iov_base, iov[i].iov_len); 61 p += iov[i].iov_len; 62 } 63 ret = sendto (s, buf, tot, flags, msg->msg_name, msg->msg_namelen); 64 free (buf); 65 return ret; 66 } 67 68 #else /* _WIN32 */ 69 70 /*********************************************************************** 71 * Copyright (c) 2009, Secure Endpoints Inc. 72 * All rights reserved. 73 * 74 * Redistribution and use in source and binary forms, with or without 75 * modification, are permitted provided that the following conditions 76 * are met: 77 * 78 * - Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 81 * - Redistributions in binary form must reproduce the above copyright 82 * notice, this list of conditions and the following disclaimer in 83 * the documentation and/or other materials provided with the 84 * distribution. 85 * 86 * - Neither the name of Secure Endpoints Inc. nor the names of its 87 * contributors may be used to endorse or promote products derived 88 * from this software without specific prior written permission. 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 91 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 92 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 93 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 94 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 95 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 96 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 97 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 99 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 100 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 101 * OF THE POSSIBILITY OF SUCH DAMAGE. 102 * 103 **********************************************************************/ 104 105 /** 106 * Implementation of sendmsg() for WIN32 107 * 108 * We are using a contrived definition of msghdr which actually uses 109 * an array of ::_WSABUF structures instead of ::iovec . This allows 110 * us to call WSASend directly using the given ::msghdr instead of 111 * having to allocate another array of ::_WSABUF and copying data for 112 * each call. 113 * 114 * Limitations: 115 * 116 * - msg->msg_name is ignored. So is msg->control. 117 * - WSASend() only supports ::MSG_DONTROUTE, ::MSG_OOB and 118 * ::MSG_PARTIAL. 119 * 120 * @param[in] s The socket to use. 121 * @param[in] msg The message 122 * @param[in] flags Flags. A combination of ::MSG_DONTROUTE, 123 * ::MSG_OOB and ::MSG_PARTIAL 124 * 125 * @return The number of bytes sent, on success. Or -1 on error. 126 */ 127 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL 128 sendmsg_w32(rk_socket_t s, const struct msghdr * msg, int flags) 129 { 130 int srv; 131 DWORD num_bytes_sent = 0; 132 133 /* TODO: For _WIN32_WINNT >= 0x0600 we can use WSASendMsg using 134 WSAMSG which is a much more direct analogue to sendmsg(). */ 135 136 srv = WSASend(s, msg->msg_iov, msg->msg_iovlen, 137 &num_bytes_sent, flags, NULL, NULL); 138 139 if (srv == 0) 140 return (int) num_bytes_sent; 141 142 /* srv == SOCKET_ERROR and WSAGetLastError() == WSA_IO_PENDING 143 indicates that a non-blocking transfer has been scheduled. 144 We'll have to check for that if we ever support non-blocking 145 I/O. */ 146 147 return -1; 148 } 149 150 #endif /* !_WIN32 */ 151
Indexes created Sat Feb 28 05:31:39 UTC 2026