nuttx/net/usrsock/usrsock_getsockname.c
liangchaozhong 644c4afeed usrsock:refine usrsock's architecture
Seperate usrsock device driver with usrsock core function layer
to make it more flexiable to adopt other kind of usrsock interface driver

Signed-off-by: liangchaozhong <liangchaozhong@xiaomi.com>
2022-09-09 20:56:12 +09:00

230 lines
6.6 KiB
C

/****************************************************************************
* net/usrsock/usrsock_getsockname.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK)
#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/net/net.h>
#include <nuttx/net/usrsock.h>
#include "usrsock/usrsock.h"
/****************************************************************************
* Private Functions
****************************************************************************/
static uint16_t getsockname_event(FAR struct net_driver_s *dev,
FAR void *pvpriv, uint16_t flags)
{
FAR struct usrsock_data_reqstate_s *pstate = pvpriv;
FAR struct usrsock_conn_s *conn = pstate->reqstate.conn;
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;
pstate->valuelen_nontrunc = 0;
}
else
{
pstate->valuelen = conn->resp.valuelen;
pstate->valuelen_nontrunc = conn->resp.valuelen_nontrunc;
}
/* 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_getsockname_request(FAR struct usrsock_conn_s *conn,
socklen_t addrlen)
{
struct usrsock_request_getsockname_s req =
{
};
struct iovec bufs[1];
if (addrlen > UINT16_MAX)
{
addrlen = UINT16_MAX;
}
/* Prepare request for daemon to read. */
req.head.reqid = USRSOCK_REQUEST_GETSOCKNAME;
req.usockid = conn->usockid;
req.max_addrlen = addrlen;
bufs[0].iov_base = (FAR void *)&req;
bufs[0].iov_len = sizeof(req);
return usrsock_do_request(conn, bufs, ARRAY_SIZE(bufs));
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usrsock_getsockname
*
* Description:
* The getsockname() function retrieves the locally-bound name of the
* specified socket, stores this address in the sockaddr structure pointed
* to by the 'addr' argument, and stores the length of this address in the
* object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Input Parameters:
* psock A reference to the socket structure of the socket
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
****************************************************************************/
int usrsock_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen)
{
FAR struct usrsock_conn_s *conn = psock->s_conn;
struct usrsock_data_reqstate_s state =
{
};
struct iovec inbufs[1];
socklen_t outaddrlen = 0;
int 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; getsockname() 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, getsockname_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 *)addr;
inbufs[0].iov_len = *addrlen;
usrsock_setup_datain(conn, inbufs, ARRAY_SIZE(inbufs));
/* Request user-space daemon to handle request. */
ret = do_getsockname_request(conn, *addrlen);
if (ret >= 0)
{
/* Wait for completion of request. */
net_lockedwait_uninterruptible(&state.reqstate.recvsem);
ret = state.reqstate.result;
DEBUGASSERT(state.valuelen <= *addrlen);
DEBUGASSERT(state.valuelen <= state.valuelen_nontrunc);
if (ret >= 0)
{
/* Store length of data that was written to 'value' buffer. */
outaddrlen = state.valuelen_nontrunc;
}
}
usrsock_teardown_datain(conn);
usrsock_teardown_data_request_callback(&state);
errout_unlock:
net_unlock();
*addrlen = outaddrlen;
return ret;
}
#endif /* CONFIG_NET && CONFIG_NET_USRSOCK */