nuttx/net
zhekunren 078782846e
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net/tcp: add configurable delayed ACK threshold
The delayed ACK logic previously sent an ACK for at least every second
received segment (hard-coded threshold of 2 per RFC 1122).  Add the
NET_TCP_ACK_FREQUENCY Kconfig option (range 1-255, default 2) to make
this threshold configurable at build time.

The delayed ACK timer still forces an ACK after at most 0.5 seconds, so
RFC 1122 timing compliance is preserved regardless of the configured
threshold.  The default value of 2 keeps the exact current behavior:
the new condition rx_unackseg >= FREQ - 1 is equivalent to the previous
rx_unackseg > 0, and the counter increment degenerates to the previous
rx_unackseg = 1 assignment.

Signed-off-by: zhekunren <zhekunren@qq.com>
Assisted-by: GLM-5.2 <noreply@z.ai>
2026-09-08 09:00:19 +08:00
..
arp net/arp: do not resolve an address to another interface's MAC 2026-08-17 11:28:45 +08:00
bluetooth net/bluetooth: fix BTPROTO_HCI socket device lookup 2026-05-06 14:45:46 +08:00
can net, arch: Fix nxstyle errors in files the CAN ioctl merge touches. 2026-09-01 17:40:47 +08:00
devif net/ipfilter: Reassemble IPv6 fragments before filtering 2026-08-01 17:40:07 -03:00
icmp !sys/types.h: change time_t and clock_t to int64_t to align with other OSes 2026-05-19 16:21:28 +08:00
icmpv6 !sys/types.h: change time_t and clock_t to int64_t to align with other OSes 2026-05-19 16:21:28 +08:00
ieee802154 include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
igmp net/igmp: fix checksum validation that always dropped valid IGMP packets 2026-08-07 16:36:42 +08:00
inet include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
ipfilter include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
ipforward net/ipv4: Forward fragments before local reassembly 2026-08-01 17:40:07 -03:00
ipfrag net/ipv4: Forward fragments before local reassembly 2026-08-01 17:40:07 -03:00
local net/local: fix SCM_RIGHTS pointer and memory corruption 2026-08-21 02:19:10 +08:00
mld !sys/types.h: change time_t and clock_t to int64_t to align with other OSes 2026-05-19 16:21:28 +08:00
nat net/nat: Reassemble IPv6 fragments before NAT66 2026-08-01 17:40:07 -03:00
neighbor include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
netdev net, arch: Fix nxstyle errors in files the CAN ioctl merge touches. 2026-09-01 17:40:47 +08:00
netfilter net/netfilter: fix match name for UDP in ipt_filter 2026-04-13 08:46:57 -03:00
netlink net/netlink: fix memory leak in netlink_get_neighbor 2026-04-13 08:46:57 -03:00
pkt include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
procfs !include/fcntl.h: align open flags with Linux values 2026-06-30 13:43:44 +08:00
route net/route: fix return value of net_writeroute_ipv6 2026-04-13 08:46:57 -03:00
rpmsg include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
sixlowpan net/sixlowpan: Fix protosize to 16-bit 2026-07-28 10:19:05 +08:00
socket include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
tcp net/tcp: add configurable delayed ACK threshold 2026-09-08 09:00:19 +08:00
udp net/udp: fix d_len corruption for 2nd+ SO_REUSEADDR listener 2026-08-12 09:41:52 -03:00
usrsock arch/sim: Add AF_LOCAL support to host usrsock 2026-07-23 15:34:02 +08:00
utils net: preserve checksum state for empty fragments 2026-09-05 10:36:43 +08:00
CMakeLists.txt net: Support no-lto option for the network build. 2026-01-20 10:12:45 +08:00
Kconfig net: Support no-lto option for the network build. 2026-01-20 10:12:45 +08:00
Makefile tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
net_initialize.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00