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 writ-
ten). 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 success-
fully 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 misconcep-
tion that non-blocking SSL_write() behaves like non-
blocking write().
SSL_MODE_AUTO_RETRY
Never bother the application with retries if the tran-
sport 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,
MirOS BSD #10-current 2005-02-05 1
SSL_CTX_SET_MODE(3) OpenSSL 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 suc-
cessful 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.
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