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tcp_get_recvwindow: use tcp_rx_mss

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Just to reduce code duplication.
No functional changes are intended.
This commit is contained in:
YAMAMOTO Takashi 2021-06-08 10:52:09 +09:00 committed by Xiang Xiao
parent 64676641cb
commit af64912833
1 changed files with 1 additions and 29 deletions
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30
net/tcp/tcp_recvwindow.c
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@ -97,38 +97,10 @@ static uint16_t tcp_maxrcvwin(FAR struct tcp_conn_s *conn)
uint16_t tcp_get_recvwindow(FAR struct net_driver_s *dev, uint16_t tcp_get_recvwindow(FAR struct net_driver_s *dev,
FAR struct tcp_conn_s *conn) FAR struct tcp_conn_s *conn)
{ {
uint16_t iplen;
uint16_t mss;
uint16_t recvwndo; uint16_t recvwndo;
int niob_avail; int niob_avail;
int nqentry_avail; int nqentry_avail;
#ifdef CONFIG_NET_IPv6
#ifdef CONFIG_NET_IPv4
if (IFF_IS_IPv6(dev->d_flags))
#endif
{
iplen = IPv6_HDRLEN;
}
#endif /* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_IPv4
#ifdef CONFIG_NET_IPv6
else
#endif
{
iplen = IPv4_HDRLEN;
}
#endif /* CONFIG_NET_IPv4 */
/* Calculate the packet MSS.
*
* REVISIT: The actual TCP header length is variable. TCP_HDRLEN
* is the minimum size.
*/
mss = dev->d_pktsize - (NET_LL_HDRLEN(dev) + iplen + TCP_HDRLEN);
/* Update the TCP received window based on read-ahead I/O buffer /* Update the TCP received window based on read-ahead I/O buffer
* and IOB chain availability. At least one queue entry is required. * and IOB chain availability. At least one queue entry is required.
* If one queue entry is available, then the amount of read-ahead * If one queue entry is available, then the amount of read-ahead
@ -186,7 +158,7 @@ uint16_t tcp_get_recvwindow(FAR struct net_driver_s *dev,
* than when eg. a single IOB is available. * than when eg. a single IOB is available.
*/ */
recvwndo = mss; recvwndo = tcp_rx_mss(dev);
} }
else /* nqentry_avail == 0 || niob_avail == 0 */ else /* nqentry_avail == 0 || niob_avail == 0 */
{ {