SSL_CTX_set_mode(3)

     SSL_CTX_set_mode(3)    0.9.6h (2001-07-11)    SSL_CTX_set_mode(3)

     NAME
          SSL_CTX_set_mode, SSL_set_mode, SSL_CTX_get_mode,
          SSL_get_mode - manipulate SSL engine mode

     SYNOPSIS
           #include <openssl/ssl.h>

           long SSL_CTX_set_mode(SSL_CTX *ctx, long mode);
           long SSL_set_mode(SSL *ssl, long mode);

           long SSL_CTX_get_mode(SSL_CTX *ctx);
           long SSL_get_mode(SSL *ssl);

     DESCRIPTION
          SSL_CTX_set_mode() adds the mode set via bitmask in mode to
          ctx.  Options already set before are not cleared.

          SSL_set_mode() adds the mode set via bitmask in mode to ssl.
          Options already set before are not cleared.

          SSL_CTX_get_mode() returns the mode set for ctx.

          SSL_get_mode() returns the mode set for ssl.

     NOTES
          The following mode changes are available:

          SSL_MODE_ENABLE_PARTIAL_WRITE
              Allow SSL_write(..., n) to return r with 0 < r < n (i.e.
              report success when just a single record has been
              written). When not set (the default), SSL_write() will
              only report success once the complete chunk was written.
              Once SSL_write() returns with r, r bytes have been
              successfully written and the next call to SSL_write()
              must only send the n-r bytes left, imitating the
              behaviour of write().

          SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
              Make it possible to retry SSL_write() with changed
              buffer location (the buffer contents must stay the
              same). This is not the default to avoid the
              misconception that non-blocking SSL_write() behaves like
              non-blocking write().

          SSL_MODE_AUTO_RETRY
              Never bother the application with retries if the
              transport is blocking.  If a renegotiation take place
              during normal operation, a SSL_read(3) or SSL_write(3)
              would return with -1 and indicate the need to retry with
              SSL_ERROR_WANT_READ.  In a non-blocking environment
              applications must be prepared to handle incomplete
              read/write operations.  In a blocking environment,

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     SSL_CTX_set_mode(3)    0.9.6h (2001-07-11)    SSL_CTX_set_mode(3)

              applications are not always prepared to deal with
              read/write operations returning without success report.
              The flag SSL_MODE_AUTO_RETRY will cause read/write
              operations to only return after the handshake and
              successful completion.

     RETURN VALUES
          SSL_CTX_set_mode() and SSL_set_mode() return the new mode
          bitmask after adding mode.

          SSL_CTX_get_mode() and SSL_get_mode() return the current
          bitmask.

     SEE ALSO
          ssl(3), SSL_read(3), SSL_write(3)

     HISTORY
          SSL_MODE_AUTO_RETRY as been added in OpenSSL 0.9.6.

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