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options.c: update usage description of --cipher

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GCC with -O3 complains:
warning: ‘%s’ directive argument is null [-Wformat-overflow=]

And indeed:
--cipher alg    : Encrypt packets with cipher algorithm alg
                  (default=(null)).

Since there is no real default anymore, remove it.
While here also indicate the somewhat-deprecated status
of the option.

Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20221228171314.133115-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg25851.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This commit is contained in:
Frank Lichtenheld 2022-12-28 18:13:14 +01:00 committed by Gert Doering
parent 24fc4ce254
commit 4410daac5a
1 changed files with 3 additions and 3 deletions
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6
src/openvpn/options.c
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@ -543,8 +543,8 @@ static const char usage_message[] =
" digest algorithm alg (default=%s).\n"
" (usually adds 16 or 20 bytes per packet)\n"
" Set alg=none to disable authentication.\n"
"--cipher alg : Encrypt packets with cipher algorithm alg\n"
" (default=%s).\n"
"--cipher alg : Encrypt packets with cipher algorithm alg.\n"
" You should usually use --data-ciphers instead.\n"
" Set alg=none to disable encryption.\n"
"--data-ciphers list : List of ciphers that are allowed to be negotiated.\n"
#ifndef ENABLE_CRYPTO_MBEDTLS
@ -4779,7 +4779,7 @@ usage(void)
o.ce.local_port, o.ce.remote_port,
TUN_MTU_DEFAULT, TAP_MTU_EXTRA_DEFAULT,
o.verbosity,
o.authname, o.ciphername,
o.authname,
o.replay_window, o.replay_time,
o.tls_timeout, o.renegotiate_seconds,
o.handshake_window, o.transition_window);