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net/tcp: add support for send timeout on buffer mode 

Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2022-02-17 14:10:03 +08:00 committed by Xiang Xiao
parent 848d1ef0b7
commit f073ed3a44
1 changed files with 60 additions and 7 deletions
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65
net/tcp/tcp_send_buffered.c
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@ -984,6 +984,34 @@ static uint32_t tcp_max_wrb_size(FAR struct tcp_conn_s *conn)
return size;
}
/****************************************************************************
* Name: tcp_send_gettimeout
*
* Description:
* Calculate the send timeout
*
****************************************************************************/
static unsigned int tcp_send_gettimeout(clock_t start, unsigned int timeout)
{
unsigned int elapse;
if (timeout != UINT_MAX)
{
elapse = TICK2MSEC(clock_systime_ticks() - start);
if (elapse >= timeout)
{
timeout = 0;
}
else
{
timeout -= elapse;
}
}
return timeout;
}
/****************************************************************************
* Public Functions
****************************************************************************/
@ -1050,9 +1078,11 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
FAR struct tcp_conn_s *conn;
FAR struct tcp_wrbuffer_s *wrb;
FAR const uint8_t *cp;
unsigned int timeout;
ssize_t result = 0;
bool nonblock;
int ret = OK;
clock_t start;
if (psock == NULL || psock->s_type != SOCK_STREAM ||
psock->s_conn == NULL)
@ -1108,6 +1138,8 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
nonblock = _SS_ISNONBLOCK(conn->sconn.s_flags) ||
(flags & MSG_DONTWAIT) != 0;
start = clock_systime_ticks();
timeout = _SO_TIMEOUT(conn->sconn.s_sndtimeo);
/* Dump the incoming buffer */
@ -1172,7 +1204,12 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
goto errout_with_lock;
}
net_lockedwait_uninterruptible(&conn->snd_sem);
ret = net_timedwait_uninterruptible(&conn->snd_sem,
tcp_send_gettimeout(start, timeout));
if (ret < 0)
{
goto errout_with_lock;
}
}
#endif /* CONFIG_NET_SEND_BUFSIZE */
@ -1210,13 +1247,12 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
{
wrb = tcp_wrbuffer_tryalloc();
ninfo("new wrb %p (non blocking)\n", wrb);
DEBUGASSERT(wrb == NULL || TCP_WBPKTLEN(wrb) == 0);
}
else
{
wrb = tcp_wrbuffer_alloc();
wrb = tcp_wrbuffer_timedalloc(tcp_send_gettimeout(start,
timeout));
ninfo("new wrb %p\n", wrb);
DEBUGASSERT(TCP_WBPKTLEN(wrb) == 0);
}
if (wrb == NULL)
@ -1224,7 +1260,20 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
/* A buffer allocation error occurred */
nerr("ERROR: Failed to allocate write buffer\n");
ret = nonblock ? -EAGAIN : -ENOMEM;
if (nonblock)
{
ret = -EAGAIN;
}
else if (timeout != UINT_MAX)
{
ret = -ETIMEDOUT;
}
else
{
ret = -ENOMEM;
}
goto errout_with_lock;
}
@ -1311,9 +1360,13 @@ ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
* we risk a deadlock with other threads competing on IOBs.
*/
iob = net_ioballoc(true, IOBUSER_NET_TCP_WRITEBUFFER);
iob = net_iobtimedalloc(true, tcp_send_gettimeout(start, timeout),
IOBUSER_NET_TCP_WRITEBUFFER);
if (iob != NULL)
{
iob_free_chain(iob, IOBUSER_NET_TCP_WRITEBUFFER);
}
}
/* Dump I/O buffer chain */