244 lines
7.5 KiB
C
244 lines
7.5 KiB
C
/****************************************************************************
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* net/usrsock/usrsock_getpeername.c
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*
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* Copyright (C) 2017 Pinecone Inc. All rights reserved.
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* Author: Guiding Li<liguiding@pinecone.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK)
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#include <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <arch/irq.h>
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#include <sys/socket.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/usrsock.h>
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#include "usrsock/usrsock.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static uint16_t getpeername_event(FAR struct net_driver_s *dev,
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FAR void *pvconn,
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FAR void *pvpriv, uint16_t flags)
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{
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FAR struct usrsock_data_reqstate_s *pstate = pvpriv;
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FAR struct usrsock_conn_s *conn = pvconn;
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if (flags & USRSOCK_EVENT_ABORT)
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{
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ninfo("socket aborted.\n");
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pstate->reqstate.result = -ECONNABORTED;
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pstate->valuelen = 0;
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/* Stop further callbacks */
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pstate->reqstate.cb->flags = 0;
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pstate->reqstate.cb->priv = NULL;
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pstate->reqstate.cb->event = NULL;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->reqstate.recvsem);
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}
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else if (flags & USRSOCK_EVENT_REQ_COMPLETE)
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{
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ninfo("request completed.\n");
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pstate->reqstate.result = conn->resp.result;
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if (pstate->reqstate.result < 0)
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{
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pstate->valuelen = 0;
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pstate->valuelen_nontrunc = 0;
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}
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else
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{
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pstate->valuelen = conn->resp.valuelen;
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pstate->valuelen_nontrunc = conn->resp.valuelen_nontrunc;
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}
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/* Stop further callbacks */
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pstate->reqstate.cb->flags = 0;
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pstate->reqstate.cb->priv = NULL;
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pstate->reqstate.cb->event = NULL;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->reqstate.recvsem);
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}
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return flags;
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}
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/****************************************************************************
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* Name: do_getsockopt_request
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****************************************************************************/
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static int do_getpeername_request(FAR struct usrsock_conn_s *conn,
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socklen_t addrlen)
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{
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struct usrsock_request_getpeername_s req = {};
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struct iovec bufs[1];
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if (addrlen > UINT16_MAX)
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{
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addrlen = UINT16_MAX;
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}
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/* Prepare request for daemon to read. */
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req.head.reqid = USRSOCK_REQUEST_GETPEERNAME;
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req.usockid = conn->usockid;
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req.max_addrlen = addrlen;
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bufs[0].iov_base = (FAR void *)&req;
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bufs[0].iov_len = sizeof(req);
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return usrsockdev_do_request(conn, bufs, ARRAY_SIZE(bufs));
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usrsock_getpeername
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*
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* Description:
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* The getpeername() function retrieves the remote-connected name of the
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* specified socket, stores this address in the sockaddr structure pointed
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* to by the 'addr' argument, and stores the length of this address in the
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* object pointed to by the 'addrlen' argument.
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*
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* If the actual length of the address is greater than the length of the
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* supplied sockaddr structure, the stored address will be truncated.
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*
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* If the socket has not been bound to a local name, the value stored in
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* the object pointed to by address is unspecified.
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*
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* Parameters:
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* conn usrsock socket connection structure
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* addr sockaddr structure to receive data [out]
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* addrlen Length of sockaddr structure [in/out]
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*
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****************************************************************************/
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int usrsock_getpeername(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen)
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{
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FAR struct usrsock_conn_s *conn = psock->s_conn;
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struct usrsock_data_reqstate_s state = {};
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struct iovec inbufs[1];
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ssize_t ret;
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socklen_t outaddrlen = 0;
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net_lock();
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if (conn->state == USRSOCK_CONN_STATE_UNINITIALIZED ||
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conn->state == USRSOCK_CONN_STATE_ABORTED)
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{
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/* Invalid state or closed by daemon. */
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ninfo("usockid=%d; usrsock_getpeername() with uninitialized usrsock.\n",
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conn->usockid);
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ret = (conn->state == USRSOCK_CONN_STATE_ABORTED) ? -EPIPE : -ECONNRESET;
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goto errout_unlock;
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}
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/* Set up event callback for usrsock. */
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ret = usrsock_setup_data_request_callback(
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conn, &state, getpeername_event,
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USRSOCK_EVENT_ABORT | USRSOCK_EVENT_REQ_COMPLETE);
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if (ret < 0)
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{
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nwarn("usrsock_setup_request_callback failed: %d\n", ret);
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goto errout_unlock;
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}
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inbufs[0].iov_base = (FAR void *)addr;
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inbufs[0].iov_len = *addrlen;
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usrsock_setup_datain(conn, inbufs, ARRAY_SIZE(inbufs));
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/* Request user-space daemon to close socket. */
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ret = do_getpeername_request(conn, *addrlen);
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if (ret >= 0)
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{
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/* Wait for completion of request. */
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while ((ret = net_lockedwait(&state.reqstate.recvsem)) < 0)
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{
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DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
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}
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ret = state.reqstate.result;
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DEBUGASSERT(state.valuelen <= *addrlen);
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DEBUGASSERT(state.valuelen <= state.valuelen_nontrunc);
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if (ret >= 0)
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{
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/* Store length of data that was written to 'value' buffer. */
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outaddrlen = state.valuelen_nontrunc;
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}
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}
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usrsock_teardown_datain(conn);
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usrsock_teardown_data_request_callback(&state);
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errout_unlock:
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net_unlock();
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*addrlen = outaddrlen;
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return ret;
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}
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#endif /* CONFIG_NET && CONFIG_NET_USRSOCK */
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