SSL_CTX_set_mode(3) OpenSSL 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);
DESCRIPTIONSSL_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, 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 VALUESSSL_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 ALSOssl(3), SSL_read(3), SSL_write(3)HISTORY
SSL_MODE_AUTO_RETRY as been added in OpenSSL 0.9.6.
11/Jul/2001 0.9.6j SSL_CTX_set_mode(3)
