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- /****************************************************************************
- * net/usrsock/usrsock_getsockopt.c
- *
- * Copyright (C) 2015, 2017 Haltian Ltd. All rights reserved.
- * Author: Jussi Kivilinna <jussi.kivilinna@haltian.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK) && \
- defined(CONFIG_NET_SOCKOPTS)
- #include <stdint.h>
- #include <string.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <arch/irq.h>
- #include <sys/socket.h>
- #include <nuttx/semaphore.h>
- #include <nuttx/net/net.h>
- #include <nuttx/net/usrsock.h>
- #include "usrsock/usrsock.h"
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- static uint16_t getsockopt_event(FAR struct net_driver_s *dev, FAR void *pvconn,
- FAR void *pvpriv, uint16_t flags)
- {
- FAR struct usrsock_data_reqstate_s *pstate = pvpriv;
- FAR struct usrsock_conn_s *conn = pvconn;
- if (flags & USRSOCK_EVENT_ABORT)
- {
- ninfo("socket aborted.\n");
- pstate->reqstate.result = -ECONNABORTED;
- pstate->valuelen = 0;
- /* Stop further callbacks */
- pstate->reqstate.cb->flags = 0;
- pstate->reqstate.cb->priv = NULL;
- pstate->reqstate.cb->event = NULL;
- /* Wake up the waiting thread */
- nxsem_post(&pstate->reqstate.recvsem);
- }
- else if (flags & USRSOCK_EVENT_REQ_COMPLETE)
- {
- ninfo("request completed.\n");
- pstate->reqstate.result = conn->resp.result;
- if (pstate->reqstate.result < 0)
- {
- pstate->valuelen = 0;
- }
- else
- {
- pstate->valuelen = conn->resp.valuelen;
- }
- /* Stop further callbacks */
- pstate->reqstate.cb->flags = 0;
- pstate->reqstate.cb->priv = NULL;
- pstate->reqstate.cb->event = NULL;
- /* Wake up the waiting thread */
- nxsem_post(&pstate->reqstate.recvsem);
- }
- return flags;
- }
- /****************************************************************************
- * Name: do_getsockopt_request
- ****************************************************************************/
- static int do_getsockopt_request(FAR struct usrsock_conn_s *conn, int level,
- int option, socklen_t value_len)
- {
- struct usrsock_request_getsockopt_s req = {};
- struct iovec bufs[1];
- if (level < INT16_MIN || level > INT16_MAX)
- {
- return -EINVAL;
- }
- if (option < INT16_MIN || option > INT16_MAX)
- {
- return -EINVAL;
- }
- if (value_len > UINT16_MAX)
- {
- value_len = UINT16_MAX;
- }
- /* Prepare request for daemon to read. */
- req.head.reqid = USRSOCK_REQUEST_GETSOCKOPT;
- req.usockid = conn->usockid;
- req.level = level;
- req.option = option;
- req.max_valuelen = value_len;
- bufs[0].iov_base = (FAR void *)&req;
- bufs[0].iov_len = sizeof(req);
- return usrsockdev_do_request(conn, bufs, ARRAY_SIZE(bufs));
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: usrsock_getsockopt
- *
- * Description:
- * getsockopt() retrieve thse value for the option specified by the
- * 'option' argument for the socket specified by the 'psock' argument. If
- * the size of the option value is greater than 'value_len', the value
- * stored in the object pointed to by the 'value' argument will be silently
- * truncated. Otherwise, the length pointed to by the 'value_len' argument
- * will be modified to indicate the actual length of the'value'.
- *
- * The 'level' argument specifies the protocol level of the option. To
- * retrieve options at the socket level, specify the level argument as
- * SOL_SOCKET.
- *
- * See <sys/socket.h> a complete list of values for the 'option' argument.
- *
- * Input Parameters:
- * conn usrsock socket connection structure
- * level Protocol level to set the option
- * option identifies the option to get
- * value Points to the argument value
- * value_len The length of the argument value
- *
- ****************************************************************************/
- int usrsock_getsockopt(FAR struct usrsock_conn_s *conn, int level, int option,
- FAR void *value, FAR socklen_t *value_len)
- {
- struct usrsock_data_reqstate_s state = {};
- struct iovec inbufs[1];
- ssize_t ret;
- net_lock();
- if (conn->state == USRSOCK_CONN_STATE_UNINITIALIZED ||
- conn->state == USRSOCK_CONN_STATE_ABORTED)
- {
- /* Invalid state or closed by daemon. */
- ninfo("usockid=%d; connect() with uninitialized usrsock.\n",
- conn->usockid);
- ret = (conn->state == USRSOCK_CONN_STATE_ABORTED) ? -EPIPE : -ECONNRESET;
- goto errout_unlock;
- }
- /* Set up event callback for usrsock. */
- ret = usrsock_setup_data_request_callback(
- conn, &state, getsockopt_event,
- USRSOCK_EVENT_ABORT | USRSOCK_EVENT_REQ_COMPLETE);
- if (ret < 0)
- {
- nwarn("usrsock_setup_request_callback failed: %d\n", ret);
- goto errout_unlock;
- }
- inbufs[0].iov_base = (FAR void *)value;
- inbufs[0].iov_len = *value_len;
- usrsock_setup_datain(conn, inbufs, ARRAY_SIZE(inbufs));
- /* Request user-space daemon to close socket. */
- ret = do_getsockopt_request(conn, level, option, *value_len);
- if (ret >= 0)
- {
- /* Wait for completion of request. */
- while ((ret = net_lockedwait(&state.reqstate.recvsem)) < 0)
- {
- DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
- }
- ret = state.reqstate.result;
- DEBUGASSERT(state.valuelen <= *value_len);
- if (ret >= 0)
- {
- /* Store length of data that was written to 'value' buffer. */
- *value_len = state.valuelen;
- }
- }
- usrsock_teardown_datain(conn);
- usrsock_teardown_data_request_callback(&state);
- errout_unlock:
- net_unlock();
- return ret;
- }
- #endif /* CONFIG_NET && CONFIG_NET_USRSOCK && CONFIG_NET_SOCKOPTS */
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