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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/ssl/SSL_accept.pod | |
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xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
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Diffstat (limited to 'openssl/doc/ssl/SSL_accept.pod')
-rw-r--r-- | openssl/doc/ssl/SSL_accept.pod | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/openssl/doc/ssl/SSL_accept.pod b/openssl/doc/ssl/SSL_accept.pod new file mode 100644 index 000000000..cc724c0d5 --- /dev/null +++ b/openssl/doc/ssl/SSL_accept.pod @@ -0,0 +1,76 @@ +=pod + +=head1 NAME + +SSL_accept - wait for a TLS/SSL client to initiate a TLS/SSL handshake + +=head1 SYNOPSIS + + #include <openssl/ssl.h> + + int SSL_accept(SSL *ssl); + +=head1 DESCRIPTION + +SSL_accept() waits for a TLS/SSL client to initiate the TLS/SSL handshake. +The communication channel must already have been set and assigned to the +B<ssl> by setting an underlying B<BIO>. + +=head1 NOTES + +The behaviour of SSL_accept() depends on the underlying BIO. + +If the underlying BIO is B<blocking>, SSL_accept() will only return once the +handshake has been finished or an error occurred, except for SGC (Server +Gated Cryptography). For SGC, SSL_accept() may return with -1, but +SSL_get_error() will yield B<SSL_ERROR_WANT_READ/WRITE> and SSL_accept() +should be called again. + +If the underlying BIO is B<non-blocking>, SSL_accept() will also return +when the underlying BIO could not satisfy the needs of SSL_accept() +to continue the handshake, indicating the problem by the return value -1. +In this case a call to SSL_get_error() with the +return value of SSL_accept() will yield B<SSL_ERROR_WANT_READ> or +B<SSL_ERROR_WANT_WRITE>. The calling process then must repeat the call after +taking appropriate action to satisfy the needs of SSL_accept(). +The action depends on the underlying BIO. When using a non-blocking socket, +nothing is to be done, but select() can be used to check for the required +condition. When using a buffering BIO, like a BIO pair, data must be written +into or retrieved out of the BIO before being able to continue. + +=head1 RETURN VALUES + +The following return values can occur: + +=over 4 + +=item 1 + +The TLS/SSL handshake was successfully completed, a TLS/SSL connection has been +established. + +=item 0 + +The TLS/SSL handshake was not successful but was shut down controlled and +by the specifications of the TLS/SSL protocol. Call SSL_get_error() with the +return value B<ret> to find out the reason. + +=item E<lt>0 + +The TLS/SSL handshake was not successful because a fatal error occurred either +at the protocol level or a connection failure occurred. The shutdown was +not clean. It can also occur of action is need to continue the operation +for non-blocking BIOs. Call SSL_get_error() with the return value B<ret> +to find out the reason. + +=back + +=head1 SEE ALSO + +L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_connect(3)|SSL_connect(3)>, +L<SSL_shutdown(3)|SSL_shutdown(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>, +L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>, +L<SSL_do_handshake(3)|SSL_do_handshake(3)>, +L<SSL_CTX_new(3)|SSL_CTX_new(3)> + +=cut |