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Improve SSL doc about I/O and timeouts

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Manuel Pégourié-Gonnard 2015-05-13 10:21:19 +02:00
parent 5a8d56d3a3
commit bbd28f7bcc
1 changed files with 17 additions and 5 deletions
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22
include/mbedtls/ssl.h
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@ -1195,7 +1195,8 @@ void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint );
*
* \note For DTLS, you must either provide a recv callback that
* doesn't block, or one that handles timeouts, see
* mbedtls_ssl_conf_bio()
* \c mbedtls_ssl_set_bio(). You also need to provide timer
* callbacks with \c mbedtls_ssl_set_timer_cb().
*
* \param conf SSL configuration
* \param transport transport type:
@ -1279,12 +1280,18 @@ void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
* \param f_send write callback
* \param f_recv read callback
* \param f_recv_timeout blocking read callback with timeout.
* The last argument of the callback is the timeout in seconds
* The last argument is the timeout in milliseconds
*
* \note f_recv_timeout is required for DTLS, unless f_recv performs
* non-blocking reads.
* \note One of f_recv or f_recv_timeout can be NULL, in which case
* the other is used. If both are non-NULL, f_recv_timeout is
* used and f_recv is ignored (as if it were NULL).
*
* \note TODO: timeout not supported with TLS yet
* \note The two most common use cases are:
* - non-blocking I/O, f_recv != NULL, f_recv_timeout == NULL
* - blocking I/O, f_recv == NULL, f_recv_timout != NULL
*
* \note For DTLS, you need to provide either a non-NULL
* f_recv_timeout callback, or a f_recv that doesn't block.
*/
void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
void *p_bio,
@ -1302,6 +1309,11 @@ void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
*
* \note With blocking I/O, this will only work if a non-NULL
* \c f_recv_timeout was set with \c mbedtls_ssl_set_bio().
* With non-blocking I/O, this will only work if timer
* callbacks were set with \c mbedtls_ssl_set_timer_cb().
*
* \note With non-blocking I/O, you may also skip this function
* altogether and handle timeouts at the application layer.
*/
void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout );