1.\" $OpenBSD: SSL_set_max_send_fragment.3,v 1.5 2019/06/12 09:36:30 schwarze Exp $ 2.\" OpenSSL doc/man3/SSL_CTX_set_split_send_fragment.pod 3.\" OpenSSL 6782e5fd Oct 21 16:16:20 2016 +0100 4.\" 5.\" This file was written by Matt Caswell <matt@openssl.org>. 6.\" Copyright (c) 2016 The OpenSSL Project. 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 17.\" the documentation and/or other materials provided with the 18.\" distribution. 19.\" 20.\" 3. All advertising materials mentioning features or use of this 21.\" software must display the following acknowledgment: 22.\" "This product includes software developed by the OpenSSL Project 23.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 24.\" 25.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26.\" endorse or promote products derived from this software without 27.\" prior written permission. For written permission, please contact 28.\" openssl-core@openssl.org. 29.\" 30.\" 5. Products derived from this software may not be called "OpenSSL" 31.\" nor may "OpenSSL" appear in their names without prior written 32.\" permission of the OpenSSL Project. 33.\" 34.\" 6. Redistributions of any form whatsoever must retain the following 35.\" acknowledgment: 36.\" "This product includes software developed by the OpenSSL Project 37.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" 38.\" 39.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50.\" OF THE POSSIBILITY OF SUCH DAMAGE. 51.\" 52.Dd $Mdocdate: June 12 2019 $ 53.Dt SSL_SET_MAX_SEND_FRAGMENT 3 54.Os 55.Sh NAME 56.Nm SSL_CTX_set_max_send_fragment , 57.Nm SSL_set_max_send_fragment 58.Nd control fragment sizes 59.Sh SYNOPSIS 60.In openssl/ssl.h 61.Ft long 62.Fo SSL_CTX_set_max_send_fragment 63.Fa "SSL_CTX *ctx" 64.Fa "long m" 65.Fc 66.Ft long 67.Fo SSL_set_max_send_fragment 68.Fa "SSL *ssl" 69.Fa "long m" 70.Fc 71.Sh DESCRIPTION 72.Fn SSL_CTX_set_max_send_fragment 73and 74.Fn SSL_set_max_send_fragment 75set the 76.Sy max_send_fragment 77parameter for SSL_CTX and SSL objects respectively. 78This value restricts the amount of plaintext bytes that will be sent in 79any one SSL/TLS record. 80By default its value is SSL3_RT_MAX_PLAIN_LENGTH (16384). 81These functions will only accept a value in the range 512 - 82SSL3_RT_MAX_PLAIN_LENGTH. 83.Pp 84These functions are implemented using macros. 85.Sh RETURN VALUES 86These functions return 1 on success or 0 on failure. 87.Sh SEE ALSO 88.Xr ssl 3 , 89.Xr SSL_ctrl 3 , 90.Xr SSL_CTX_set_read_ahead 3 , 91.Xr SSL_pending 3 92.Sh HISTORY 93.Fn SSL_CTX_set_max_send_fragment 94and 95.Fn SSL_set_max_send_fragment 96first appeared in OpenSSL 1.0.0 and have been available since 97.Ox 4.9 . 98