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/*
*
* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
* Licensed 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.
*/
#include "stackx_spl_share.h"
#include "common_pal_bitwide_adjust.h"
#include "stackx_event.h"
#define FREE_FD_SET(readfd, writefd, exceptfd) {\
if(readfd)\
free(readfd);\
if(writefd)\
free(writefd);\
if(exceptfd)\
free(exceptfd);\
}
int
lwip_try_select (int fdsize, fd_set * fdread, fd_set * fdwrite,
fd_set * fderr, struct timeval *timeout)
{
int i;
int nready = 0;
nstack_fd_set *read_out;
nstack_fd_set *write_out;
nstack_fd_set *err_out;
nstack_fd_set *readfd = (nstack_fd_set *) fdread;
nstack_fd_set *writefd = (nstack_fd_set *) fdwrite;
nstack_fd_set *exceptfd = (nstack_fd_set *) fderr;
sbr_socket_t *sock;
spl_netconn_t *conn;
if ((fdsize >= NSTACK_SETSIZE) || (fdsize < 0))
{
return 0;
}
read_out = malloc (sizeof (nstack_fd_set));
write_out = malloc (sizeof (nstack_fd_set));
err_out = malloc (sizeof (nstack_fd_set));
if ((!read_out) || (!write_out) || (!err_out))
{
NSPOL_LOGERR ("malloc nstack_fd_set fail");
FREE_FD_SET (read_out, write_out, err_out);
return -1;
}
int ret = NSTACK_FD_ZERO (read_out);
int ret1 = NSTACK_FD_ZERO (write_out);
int ret2 = NSTACK_FD_ZERO (err_out);
if ((EOK != ret) || (EOK != ret1) || (EOK != ret2))
{
NSPOL_LOGERR ("NSTACK_FD_ZERO fail");
FREE_FD_SET (read_out, write_out, err_out);
return -1;
}
for (i = 0; i < fdsize; i++)
{
if (!((readfd && NSTACK_FD_ISSET (i, readfd))
|| (writefd && NSTACK_FD_ISSET (i, writefd))
|| (exceptfd && NSTACK_FD_ISSET (i, exceptfd))))
{
continue;
}
sock = sbr_lookup_sk (i);
if (sock == NULL)
{
errno = EBADF;
FREE_FD_SET (read_out, write_out, err_out);
return -1;
}
conn = sbr_get_conn (sock);
if (!conn)
{
errno = EBADF;
FREE_FD_SET (read_out, write_out, err_out);
return -1;
}
if (readfd && NSTACK_FD_ISSET (i, readfd) &&
((sbr_get_fd_share (sock)->lastdata != NULL)
|| (conn->rcvevent > 0)))
{
NSTACK_FD_SET (i, read_out);
nready++;
}
if (writefd && NSTACK_FD_ISSET (i, writefd) && (conn->sendevent != 0))
{
NSTACK_FD_SET (i, write_out);
nready++;
}
if (exceptfd && NSTACK_FD_ISSET (i, exceptfd) && (conn->errevent != 0))
{
NSTACK_FD_SET (i, write_out);
nready++;
}
}
//TODO: need to handle fd_set and nstack_fd_set memory issue
if (readfd)
{
*readfd = *read_out;
}
if (writefd)
{
*writefd = *write_out;
}
if (exceptfd)
{
*exceptfd = *err_out;
}
FREE_FD_SET (read_out, write_out, err_out);
return nready;
}
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