Function tlsHandleEvent

app/redis-6.2.6/src/tls.c:547–672

}

static void tlsHandleEvent(tls_connection *conn, int mask) {
    int ret, conn_error;

    TLSCONN_DEBUG("tlsEventHandler(): fd=%d, state=%d, mask=%d, r=%d, w=%d, flags=%d",
            fd, conn->c.state, mask, conn->c.read_handler != NULL, conn->c.write_handler != NULL,
            conn->flags);

    ERR_clear_error();

    switch (conn->c.state) {
        case CONN_STATE_CONNECTING:
            conn_error = connGetSocketError((connection *) conn);
            if (conn_error) {
                conn->c.last_errno = conn_error;
                conn->c.state = CONN_STATE_ERROR;
            } else {
                if (!(conn->flags & TLS_CONN_FLAG_FD_SET)) {
                    SSL_set_fd(conn->ssl, conn->c.fd);
                    conn->flags |= TLS_CONN_FLAG_FD_SET;
                }
                ret = SSL_connect(conn->ssl);
                if (ret <= 0) {
                    WantIOType want = 0;
                    if (!handleSSLReturnCode(conn, ret, &want)) {
                        registerSSLEvent(conn, want);

                        /* Avoid hitting UpdateSSLEvent, which knows nothing
                         * of what SSL_connect() wants and instead looks at our
                         * R/W handlers.
                         */
                        return;
                    }

                    /* If not handled, it's an error */
                    conn->c.state = CONN_STATE_ERROR;
                } else {
                    conn->c.state = CONN_STATE_CONNECTED;
                }
            }

            if (!callHandler((connection *) conn, conn->c.conn_handler)) return;
            conn->c.conn_handler = NULL;
            break;
        case CONN_STATE_ACCEPTING:
            ret = SSL_accept(conn->ssl);
            if (ret <= 0) {
                WantIOType want = 0;
                if (!handleSSLReturnCode(conn, ret, &want)) {
                    /* Avoid hitting UpdateSSLEvent, which knows nothing
                     * of what SSL_connect() wants and instead looks at our
                     * R/W handlers.
                     */
                    registerSSLEvent(conn, want);
                    return;
                }

                /* If not handled, it's an error */
                conn->c.state = CONN_STATE_ERROR;