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send-email: enable SSL level 1 debug output

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If a server's certificate isn't accepted by send-email, the output is:

	Unable to initialize SMTP properly. Check config and use --smtp-debug.

but adding --smtp-debug=1 just produces the same output since we don't
get as far as talking SMTP.

Turning on SSL debug at level 1 gives:

	DEBUG: .../IO/Socket/SSL.pm:1796: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
	DEBUG: .../IO/Socket/SSL.pm:673: fatal SSL error: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
	DEBUG: .../IO/Socket/SSL.pm:1780: IO::Socket::IP configuration failed

IO::Socket::SSL defines level 1 debug as "print out errors from
IO::Socket::SSL and ciphers from Net::SSLeay".  In fact, it aliases
Net::SSLeay::trace which is defined to guarantee silence at level 0 and
only emit error messages at level 1, so let's enable it by default.

The modification of warnings is needed to avoid a warning about:

	Name "IO::Socket::SSL::DEBUG" used only once: possible typo

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
John Keeping 2015-12-03 21:47:18 +00:00 committed by Junio C Hamano
parent 5cb2e162d2
commit 9d605249e5
1 changed files with 7 additions and 0 deletions
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7
git-send-email.perl
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@ -1318,6 +1318,13 @@ Message-Id: $message_id
require Net::SMTP::SSL;
$smtp_domain ||= maildomain();
require IO::Socket::SSL;
# Suppress "variable accessed once" warning.
{
no warnings 'once';
$IO::Socket::SSL::DEBUG = 1;
}
# Net::SMTP::SSL->new() does not forward any SSL options
IO::Socket::SSL::set_client_defaults(
ssl_verify_params());