1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2015 Nahanni Systems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/types.h> 35 #include <unistd.h> 36 37 #ifndef __FreeBSD__ 38 #include <sys/socket.h> 39 #endif 40 41 #include <errno.h> 42 43 #include "sockstream.h" 44 45 ssize_t 46 stream_read(int fd, void *buf, ssize_t nbytes) 47 { 48 uint8_t *p; 49 ssize_t len = 0; 50 ssize_t n; 51 52 p = buf; 53 54 while (len < nbytes) { 55 n = read(fd, p + len, nbytes - len); 56 if (n == 0) 57 break; 58 59 if (n < 0) { 60 if (errno == EINTR || errno == EAGAIN) 61 continue; 62 return (n); 63 } 64 len += n; 65 } 66 return (len); 67 } 68 69 ssize_t 70 stream_write(int fd, const void *buf, ssize_t nbytes) 71 { 72 const uint8_t *p; 73 ssize_t len = 0; 74 ssize_t n; 75 76 p = buf; 77 78 while (len < nbytes) { 79 #ifdef __FreeBSD__ 80 n = write(fd, p + len, nbytes - len); 81 #else 82 n = send(fd, p + len, nbytes - len, MSG_NOSIGNAL); 83 #endif 84 if (n == 0) 85 break; 86 if (n < 0) { 87 if (errno == EINTR || errno == EAGAIN) 88 continue; 89 return (n); 90 } 91 len += n; 92 } 93 return (len); 94 } 95