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tcp_recvfrom.c:malloc a new iob to handle psock_send_eventhandler when tcp_recvhandler calls tcp_newdata to clear dev->d_iob

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Signed-off-by: wangchen <wangchen41@xiaomi.com>
This commit is contained in:
wangchen 2024-08-19 16:16:59 +08:00 committed by Xiang Xiao
parent 97eef351dc
commit 8ea31668ca
1 changed files with 26 additions and 0 deletions
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26
net/tcp/tcp_recvfrom.c
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@ -393,6 +393,7 @@ static uint16_t tcp_recvhandler(FAR struct net_driver_s *dev,
FAR void *pvpriv, uint16_t flags)
{
FAR struct tcp_recvfrom_s *pstate = pvpriv;
FAR struct iob_s *iob = NULL;
ninfo("flags: %04x\n", flags);
@ -408,12 +409,37 @@ static uint16_t tcp_recvhandler(FAR struct net_driver_s *dev,
tcp_sender(dev, pstate);
if ((flags & TCP_ACKDATA) != 0)
{
iob = iob_tryalloc(false);
if (iob == NULL)
{
nerr("ERROR: IOB alloc failed !\n");
return flags;
}
iob_reserve(iob, CONFIG_NET_LL_GUARDSIZE);
int ret = iob_clone_partial(dev->d_iob, dev->d_iob->io_pktlen,
0, iob, 0, false, false);
if (ret < 0)
{
iob_free_chain(iob);
nerr("ERROR: IOB clone failed ret=%d!\n", ret);
return flags;
}
}
/* Copy the data from the packet (saving any unused bytes from the
* packet in the read-ahead buffer).
*/
flags = tcp_newdata(dev, pstate, flags);
if (iob != NULL)
{
netdev_iob_replace(dev, iob);
}
/* Indicate that the data has been consumed and that an ACK
* should be sent.
*/