man7.org > Linux > man-pages

Linux/UNIX system programming training

gnutls_x509_crt_check_ip(3) — Linux manual page

NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON 

gnutls_x509_crt_check_ip(3)       gnutls      gnutls_x509_crt_check_ip(3)

NAME         top

       gnutls_x509_crt_check_ip - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       unsigned gnutls_x509_crt_check_ip(gnutls_x509_crt_t cert, const
       unsigned char * ip, unsigned int ip_size, unsigned int flags);

ARGUMENTS         top

       gnutls_x509_crt_t cert
                   should contain an gnutls_x509_crt_t type

       const unsigned char * ip
                   A pointer to the raw IP address

       unsigned int ip_size
                   the number of bytes in ip (4 or 16)

       unsigned int flags
                   should be zero

DESCRIPTION         top

       This function will check if the IP allowed IP addresses in the
       certificate's subject alternative name match the provided IP
       address.

RETURNS         top

       non-zero for a successful match, and zero on failure.

REPORTING BUGS         top

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT         top

       Copyright © 2001-2023 Free Software Foundation, Inc., and others.
       Copying and distribution of this file, with or without
       modification, are permitted in any medium without royalty provided
       the copyright notice and this notice are preserved.

SEE ALSO         top

       The full documentation for gnutls is maintained as a Texinfo
       manual.  If the /usr/share/doc/gnutls/ directory does not contain
       the HTML form visit

       https://www.gnutls.org/manual/

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at
       ⟨http://www.gnutls.org/⟩.  If you have a bug report for this
       manual page, send it to bugs@gnutls.org.  This page was obtained
       from the tarball fetched from
       ⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for the
       page, or you have corrections or improvements to the information
       in this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

gnutls                            3.8.10      gnutls_x509_crt_check_ip(3)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI