diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/gtls.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/gtls.c b/lib/gtls.c index ee7612028..bbd87161d 100644 --- a/lib/gtls.c +++ b/lib/gtls.c @@ -67,6 +67,23 @@ static void tls_log_func(int level, const char *str) } #endif +/* + * Custom push and pull callback functions used by GNU TLS to read and write + * to the socket. These functions are simple wrappers to send() and recv() + * (although here using the sread/swrite macros as defined by setup_once.h). + * We use custom functions rather than the GNU TLS defaults because it allows + * us to get specific about the fourth "flags" argument, and to use arbitrary + * private data with gnutls_transport_set_ptr if we wish. + */ +static ssize_t Curl_gtls_push(void *s, const void *buf, size_t len) +{ + return swrite(s, buf, len); +} + +static ssize_t Curl_gtls_pull(void *s, void *buf, size_t len) +{ + return sread(s, buf, len); +} /* Global GnuTLS init, called from Curl_ssl_init() */ int Curl_gtls_init(void) @@ -285,6 +302,13 @@ Curl_gtls_connect(struct connectdata *conn, gnutls_transport_set_ptr(session, (gnutls_transport_ptr)conn->sock[sockindex]); + /* register callback functions to send and receive data. */ + gnutls_transport_set_push_function(session, Curl_gtls_push); + gnutls_transport_set_pull_function(session, Curl_gtls_pull); + + /* lowat must be set to zero when using custom push and pull functions. */ + gnutls_transport_set_lowat(session, 0); + /* This might be a reconnect, so we check for a session ID in the cache to speed up things */ |