| 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | * SPDX-License-Identifier: curl
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| 22 | *
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| 23 | ***************************************************************************/
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| 24 |
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| 25 | #include "curl_setup.h"
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| 26 |
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| 27 | #ifdef HAVE_SYS_IOCTL_H
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| 28 | #include <sys/ioctl.h>
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| 29 | #endif
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| 30 | #ifdef HAVE_FCNTL_H
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| 31 | #include <fcntl.h>
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| 32 | #endif
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| 33 |
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| 34 | #ifdef __VMS
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| 35 | #include <in.h>
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| 36 | #include <inet.h>
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| 37 | #endif
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| 38 |
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| 39 | #include "nonblock.h"
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| 40 |
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| 41 | /*
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| 42 | * curlx_nonblock() set the given socket to either blocking or non-blocking
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| 43 | * mode based on the 'nonblock' boolean argument. This function is highly
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| 44 | * portable.
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| 45 | */
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| 46 | int curlx_nonblock(curl_socket_t sockfd, /* operate on this */
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| 47 | int nonblock /* TRUE or FALSE */)
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| 48 | {
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| 49 | #if defined(HAVE_FCNTL_O_NONBLOCK)
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| 50 | /* most recent Unix versions */
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| 51 | int flags;
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| 52 | flags = sfcntl(sockfd, F_GETFL, 0);
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| 53 | if(flags < 0)
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| 54 | return -1;
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| 55 | /* Check if the current file status flags have already satisfied
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| 56 | * the request, if so, it is no need to call fcntl() to replicate it.
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| 57 | */
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| 58 | if(!!(flags & O_NONBLOCK) == !!nonblock)
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| 59 | return 0;
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| 60 | if(nonblock)
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| 61 | flags |= O_NONBLOCK;
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| 62 | else
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| 63 | flags &= ~O_NONBLOCK;
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| 64 | return sfcntl(sockfd, F_SETFL, flags);
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| 65 |
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| 66 | #elif defined(HAVE_IOCTL_FIONBIO)
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| 67 |
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| 68 | /* older Unix versions */
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| 69 | int flags = nonblock ? 1 : 0;
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| 70 | return ioctl(sockfd, FIONBIO, &flags);
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| 71 |
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| 72 | #elif defined(HAVE_IOCTLSOCKET_FIONBIO)
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| 73 |
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| 74 | /* Windows */
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| 75 | unsigned long flags = nonblock ? 1UL : 0UL;
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| 76 | return ioctlsocket(sockfd, (long)FIONBIO, &flags);
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| 77 |
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| 78 | #elif defined(HAVE_IOCTLSOCKET_CAMEL_FIONBIO)
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| 79 |
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| 80 | /* Amiga */
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| 81 | long flags = nonblock ? 1L : 0L;
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| 82 | return IoctlSocket(sockfd, FIONBIO, (char *)&flags);
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| 83 |
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| 84 | #elif defined(HAVE_SETSOCKOPT_SO_NONBLOCK)
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| 85 |
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| 86 | /* Orbis OS */
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| 87 | long b = nonblock ? 1L : 0L;
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| 88 | return setsockopt(sockfd, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
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| 89 |
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| 90 | #else
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| 91 | # error "no non-blocking method was found/used/set"
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| 92 | #endif
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| 93 | }
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