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Edit File : SSL_SESSION_set1_alpn_selected.3 \| Size : 6.80 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \(-- will .\" give an unbreakable dash, \(PI will give pi, \(L" will give a left .\" double quote, and \(R" will give a right double quote. \(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_SESSION_get0_hostname, SSL_SESSION_set1_hostname, SSL_SESSION_get0_alpn_selected, SSL_SESSION_set1_alpn_selected \&\- get and set SNI and ALPN data associated with a session .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& const char SSL_SESSION_get0_hostname(const SSL_SESSION s); \& int SSL_SESSION_set1_hostname(SSL_SESSION s, const char hostname); \& \& void SSL_SESSION_get0_alpn_selected(const SSL_SESSION s, \& const unsigned char *alpn, \& size_t len); \& int SSL_SESSION_set1_alpn_selected(SSL_SESSION s, const unsigned char alpn, \& size_t len); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_SESSION_get0_hostname()\fR retrieves the \s-1SNI\s0 value that was sent by the client when the session was created if it was accepted by the server and TLSv1.2 or below was negotiated. Otherwise \s-1NULL\s0 is returned. Note that in TLSv1.3 the \&\s-1SNI\s0 hostname is negotiated with each handshake including resumption handshakes and is therefore never associated with the session. .PP The value returned is a pointer to memory maintained within \fBs\fR and should not be free'd. .PP \&\fBSSL_SESSION_set1_hostname()\fR sets the \s-1SNI\s0 value for the hostname to a copy of the string provided in hostname. .PP \&\fBSSL_SESSION_get0_alpn_selected()\fR retrieves the selected \s-1ALPN\s0 protocol for this session and its associated length in bytes. The returned value of \fBalpn\fR is a pointer to memory maintained within \fBs\fR and should not be free'd. .PP \&\fBSSL_SESSION_set1_alpn_selected()\fR sets the \s-1ALPN\s0 protocol for this session to the value in \fBalpn\fR which should be of length \fBlen\fR bytes. A copy of the input value is made, and the caller retains ownership of the memory pointed to by \&\fBalpn\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSSL_SESSION_get0_hostname()\fR returns either a string or \s-1NULL\s0 based on if there is the \s-1SNI\s0 value sent by client. .PP \&\fBSSL_SESSION_set1_hostname()\fR returns 1 on success or 0 on error. .PP \&\fBSSL_SESSION_set1_alpn_selected()\fR returns 1 on success or 0 on error. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\\|(7), \&\fBd2i_SSL_SESSION\fR\\|(3), \&\fBSSL_SESSION_get_time\fR\\|(3), \&\fBSSL_SESSION_free\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" The \fBSSL_SESSION_set1_hostname()\fR, \fBSSL_SESSION_get0_alpn_selected()\fR and \&\fBSSL_SESSION_set1_alpn_selected()\fR functions were added in OpenSSL 1.1.1. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016\-2020 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>. Back

Edit File : SSL_SESSION_set1_alpn_selected.3 | Size : 6.80 KB

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.\" ========================================================================
.\"
.IX Title "SSL_SESSION_GET0_HOSTNAME 3"
.TH SSL_SESSION_GET0_HOSTNAME 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SSL_SESSION_get0_hostname, SSL_SESSION_set1_hostname, SSL_SESSION_get0_alpn_selected, SSL_SESSION_set1_alpn_selected \&\- get and set SNI and ALPN data associated with a session
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s);
\& int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname);
\&
\& void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s,
\&                                     const unsigned char **alpn,
\&                                     size_t *len);
\& int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn,
\&                                    size_t len);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_SESSION_get0_hostname()\fR retrieves the \s-1SNI\s0 value that was sent by the
client when the session was created if it was accepted by the server and TLSv1.2
or below was negotiated. Otherwise \s-1NULL\s0 is returned. Note that in TLSv1.3 the
\&\s-1SNI\s0 hostname is negotiated with each handshake including resumption handshakes
and is therefore never associated with the session.
.PP
The value returned is a pointer to memory maintained within \fBs\fR and
should not be free'd.
.PP
\&\fBSSL_SESSION_set1_hostname()\fR sets the \s-1SNI\s0 value for the hostname to a copy of
the string provided in hostname.
.PP
\&\fBSSL_SESSION_get0_alpn_selected()\fR retrieves the selected \s-1ALPN\s0 protocol for this
session and its associated length in bytes. The returned value of \fB*alpn\fR is a
pointer to memory maintained within \fBs\fR and should not be free'd.
.PP
\&\fBSSL_SESSION_set1_alpn_selected()\fR sets the \s-1ALPN\s0 protocol for this session to the
value in \fBalpn\fR which should be of length \fBlen\fR bytes. A copy of the input
value is made, and the caller retains ownership of the memory pointed to by
\&\fBalpn\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSSL_SESSION_get0_hostname()\fR returns either a string or \s-1NULL\s0 based on if there
is the \s-1SNI\s0 value sent by client.
.PP
\&\fBSSL_SESSION_set1_hostname()\fR returns 1 on success or 0 on error.
.PP
\&\fBSSL_SESSION_set1_alpn_selected()\fR returns 1 on success or 0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7),
\&\fBd2i_SSL_SESSION\fR\|(3),
\&\fBSSL_SESSION_get_time\fR\|(3),
\&\fBSSL_SESSION_free\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBSSL_SESSION_set1_hostname()\fR, \fBSSL_SESSION_get0_alpn_selected()\fR and
\&\fBSSL_SESSION_set1_alpn_selected()\fR functions were added in OpenSSL 1.1.1.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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