nuttx/net/local/local_sendpacket.c
zhanghongyu cd86499e83 local_socket: add SO_SNDBUF & SO_RCVBUF support for accept socket
SO_SNDBUF takes effect only after the connection in STREAM mode
is successful
support full life cycle modification of SO_RCVBUF

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
2024-09-10 11:35:15 +08:00

208 lines
5.8 KiB
C

/****************************************************************************
* net/local/local_sendpacket.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>
#include <sys/types.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/fs/fs.h>
#include "devif/devif.h"
#include "local/local.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: local_fifo_write
*
* Description:
* Write a data on the write-only FIFO.
*
* Input Parameters:
* filep File structure of write-only FIFO.
* buf Data to send
* len Length of data to send
*
* Returned Value:
* On success, the number of bytes written are returned (zero indicates
* nothing was written). On any failure, a negated errno value is returned
*
****************************************************************************/
static int local_fifo_write(FAR struct file *filep, FAR const uint8_t *buf,
size_t len)
{
ssize_t nwritten = 0;
ssize_t ret = 0;
while (len != nwritten)
{
ret = file_write(filep, buf + nwritten, len - nwritten);
if (ret < 0)
{
if (ret == -EINTR)
{
continue;
}
else if (ret == -EAGAIN)
{
break;
}
else
{
nerr("ERROR: file_write failed: %zd\n", ret);
break;
}
}
nwritten += ret;
}
return nwritten > 0 ? nwritten : ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: local_send_preamble
*
* Description:
* Send a packet on the write-only FIFO.
*
* Input Parameters:
* conn A reference to local connection structure
* filep File structure of write-only FIFO.
* buf Data to send
* len Length of data to send
*
* Returned Value:
* Packet length is returned on success; a negated errno value is returned
* on any failure.
*
****************************************************************************/
int local_send_preamble(FAR struct local_conn_s *conn,
FAR struct file *filep,
FAR const struct iovec *buf,
size_t len, size_t rcvsize)
{
FAR const struct iovec *end = buf + len;
FAR const struct iovec *iov;
int ret;
lc_size_t pathlen;
lc_size_t pktlen;
/* Send the packet length */
for (pktlen = 0, iov = buf; iov != end; iov++)
{
pktlen += iov->iov_len;
}
if (pktlen > rcvsize - sizeof(lc_size_t))
{
nerr("ERROR: Packet is too big: %d\n", pktlen);
return -EMSGSIZE;
}
pathlen = strlen(conn->lc_path);
ret = local_fifo_write(&conn->lc_outfile, (FAR const uint8_t *)&pathlen,
sizeof(lc_size_t));
if (ret != sizeof(lc_size_t))
{
nerr("ERROR: local send path length failed ret: %d\n", ret);
return ret;
}
ret = local_fifo_write(filep, (FAR const uint8_t *)&pktlen,
sizeof(lc_size_t));
if (ret != sizeof(lc_size_t))
{
return ret;
}
return local_fifo_write(&conn->lc_outfile, (uint8_t *)conn->lc_path,
pathlen);
}
/****************************************************************************
* Name: local_send_packet
*
* Description:
* Send a packet on the write-only FIFO.
*
* Input Parameters:
* filep File structure of write-only FIFO.
* buf Data to send
* len Length of data to send
*
* Returned Value:
* Packet length is returned on success; a negated errno value is returned
* on any failure.
*
****************************************************************************/
int local_send_packet(FAR struct file *filep, FAR const struct iovec *buf,
size_t len)
{
FAR const struct iovec *end = buf + len;
FAR const struct iovec *iov;
int ret = -EINVAL;
lc_size_t sendlen;
for (sendlen = 0, iov = buf; iov != end; iov++)
{
ret = local_fifo_write(filep, iov->iov_base, iov->iov_len);
if (ret < 0)
{
if (ret != -EAGAIN)
{
nerr("ERROR: local send packet failed ret: %d\n", ret);
}
break;
}
if (ret > 0)
{
sendlen += ret;
if (ret != iov->iov_len)
{
break;
}
}
}
return sendlen > 0 ? sendlen : ret;
}