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43 Commits

Author SHA1 Message Date
chao.an
669fb83706 net/tcp(buffered): retransmit only one the earliest not acknowledged segment 
Retransmit only one the earliest not acknowledged segment
(according to RFC 6298 (5.4)). The issue is the same as it was
in tcp_send_unbuffered.c and tcp_sendfile.c.

Signed-off-by: chao.an <anchao@xiaomi.com>
 2022-06-16 18:14:29 +08:00
Alexander Lunev
64dd669749 net/tcp/sendfile: retransmit only one the earliest not acknowledged segment 
(according to RFC 6298 (5.4)). The issue is the same as it was in tcp_send_unbuffered.c.
 2022-01-20 18:37:39 +08:00
Alexander Lunev
0f080cdeaf net/tcp/sendfile: NET_TCP_WRITE_BUFFERS and NET_SENDFILE were inconsistent with each other: 
tcp_sendfile() reads data directly from a file and does not use NET_TCP_WRITE_BUFFERS data flow
even if CONFIG_NET_TCP_WRITE_BUFFERS option is enabled.
Despite this, tcp_sendfile relied on NET_TCP_WRITE_BUFFERS specific flow control variables that
were idle during sendfile operation. Thus it was a total inconsistency.

E.g. because of the issue, TCP socket used by sendfile() operation never issued
FIN packet on close() command, and the TCP connection hung up.

As a result of the fix, simultaneously enabled CONFIG_NET_TCP_WRITE_BUFFERS and
CONFIG_NET_SENDFILE options can coexist.
 2022-01-17 01:42:41 +08:00
Alexander Lunev
1e07b6d528 net/tcp(unbuffered): retransmit only one the earliest not acknowledged segment 
(according to RFC 6298 (5.4)).
 2021-11-10 12:21:07 -06:00
YAMAMOTO Takashi
e53f989997 tcp_rexmit: advance conn->sndseq 
Otherwise, we use an old sequence number when sending
non-data segment. (eg. window update)
The peer might consider such a segment stale and ignore.
 2021-08-06 21:17:25 -07:00
YAMAMOTO Takashi
14ec75e7fc tcp: window update improvements 
* Fixes the case where the window was small but not zero.

* tcp_recvfrom: Remove tcp_ackhandler. Instead, simply schedule TX for
  a possible window update and make tcp_appsend decide.

* Replace rcv_wnd (the last advertized window size value) with
  rcv_adv. (the window edge sequence number advertized to the peer)
  rcv_wnd was complicated to deal with because its base (rcvseq) is
  also moving.

* tcp_appsend: Send a window update even if there are no other reasons
  to send an ack.
  Namely, send an update if it increases the window by
    * 2 * mss
    * or the half of the max possible window size
 2021-06-13 21:20:24 -05:00
YAMAMOTO Takashi
cc9b3a3ec5 net/tcp/tcp_appsend.c: Fix syslog formats 
Note: tx_unacked is either uint16_t or uint32_t depending on the config.
 2020-11-27 05:18:57 -06:00
YAMAMOTO Takashi
af6719965f net/tcp/tcp_appsend.c: Fix syslog formats 2020-11-25 05:11:26 -08:00
YAMAMOTO Takashi
390f766b36 net/tcp/tcp_appsend.c: Appease nxstyle 2020-11-25 05:11:26 -08:00
Gregory Nutt
c2642eef3c net/tcp/tcp_appsend.c: Enhance delayed ACK algorithm with behavior of Windows delayed ACK described at https://support.microsoft.com/en-nz/help/214397/design-issues-sending-small-data-segments-over-tcp-with-winsock: 'If there are data to be sent in the same direction as the ACK before the second data packet is received and the delay timer expires, the ACK is piggybacked with the data segment and sent immediately.' 2019-12-09 08:45:52 -06:00
Gregory Nutt
6a0ab27bd5 net/tcp/tcp_appsend.c: Update some comments. 2019-12-09 06:06:17 -06:00
Gregory Nutt
8cd5e04d53 net/tcp: Minor design improvement to TCP delayed ACKs. 2019-12-08 14:17:55 -06:00
Gregory Nutt
66ef6d143a This commit adds an initial implemented of TCP delayed ACKs as specified in RFC 1122. 
Squashed commit of the following:

    net/tmp:  Rename the unacked field of the tcp connection structure to tx_unacked.  Too confusing with the implementation of delayed RX ACKs.

    net/tcp:  Initial implementation of TCP delayed ACKs.

    net/tcp:  Add delayed ACK configuration selection.  Rename tcp_ack() to tcp_synack().  It may or may not send a ACK.  It will always send SYN or SYN/ACK.
 2019-12-08 13:13:51 -06:00
zhangyuan7
b33fc302f0 net/inet and net/tcp: Fix tcp close flow; free the connection after all tcp close process finished. 2019-08-30 06:44:43 -06:00
Gregory Nutt
b54ffe858a Standardization of some function headers. 2018-03-13 09:52:27 -06:00
Gregory Nutt
7cf88d7dbd Make sure that labeling is used consistently in all function headers. 2018-02-01 10:00:02 -06:00
Gregory Nutt
0b2a4eb4bd Networking: A little more wording changes related to interrupts vs. events 2017-08-29 15:08:38 -06:00
Gregory Nutt
43eb04bb8f Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info(). 2016-06-20 11:59:15 -06:00
Gregory Nutt
fc3540cffe Replace all occurrences of vdbg with vinfo 2016-06-11 11:59:51 -06:00
Gregory Nutt
2c95fef501 Remove some empty code section comments 2016-02-26 07:35:55 -06:00
Gregory Nutt
0fb035f76b Standardize some naming in code section comments 2016-02-21 18:09:04 -06:00
Gregory Nutt
0b12dbf95d Fix some spacing problems 2015-10-04 15:04:00 -06:00
Gregory Nutt
cb9e27c3b0 Standardize naming used for public data and function groupings 2015-10-02 16:30:35 -06:00
Anton D. Kachalov
b125c36849 Field `d_sndlen' is unsigned. It is always >= 0. 
Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>
 2015-08-26 00:16:52 +03:00
Gregory Nutt
04a661a97c TCP networking: Add support for network driver events 2015-05-30 09:12:27 -06:00
Gregory Nutt
eac4ea7ae5 Networking: Back out a previous change. It is incorrect 2015-01-22 12:10:16 -06:00
Gregory Nutt
46fc574f0f Forgot to remove some debug instrumentation in the last commit 2015-01-22 10:35:11 -06:00
Gregory Nutt
7106469191 Armv7-M: Remove Px4-only setting of stack to 0xff. This is incompatible with standard NuttX stack montitoring logic 2015-01-22 10:09:10 -06:00
Gregory Nutt
ea52bda8f9 Networking: Add IPv6 suppport to TCP application level sending logic 2015-01-17 18:18:19 -06:00
Gregory Nutt
88a0e82934 Networking: Remove field d_sndata from the device structure. It is the same as d_appdata and unnecessary 2015-01-17 05:59:13 -06:00
Gregory Nutt
630366272a Networking: Seperate tcp_input() and udp_input() into seprate functions tcp_ipv4_input(), tcp_ipv6_input(), udp_ipv4_input(), and upd_ipv6_input() than can deal will the data offsets caused by the differing sizes of the IP header. 2015-01-15 15:06:46 -06:00
Gregory Nutt
73f3ecf7e2 NET: Rename network interrupt event flags more appropriately: TCP_, UDP_, ICMP_, or PKT_ vs UIP_ 2014-07-06 17:22:02 -06:00
Gregory Nutt
b77fda2c95 NET: Rename TCP state values: UIP_ -> TCP_ 2014-07-06 16:10:26 -06:00
Gregory Nutt
c5fc24e110 NET: Standardize naming of all protocal header lengths 2014-07-05 13:04:48 -06:00
Gregory Nutt
0bb153b8cb Remove all inclusion of uip.h 2014-07-04 16:58:22 -06:00
Gregory Nutt
5790c94ba3 Rename net/uip to net/devif. Rename uip/uip.h to devif/devif.h 2014-06-28 18:07:02 -06:00
Gregory Nutt
fce2a79abd Rename uip_driver_s net_driver_s 2014-06-27 16:48:12 -06:00
Gregory Nutt
e1091251e6 NET: Move statistcs from uip.h to new netstats.h to remove nasty circular inclusion problem. 2014-06-26 09:32:39 -06:00
Gregory Nutt
04985d6d1e Clean up all TCP-related naming 2014-06-24 18:12:49 -06:00
Gregory Nutt
5d1f8180d4 Move the remaining files from include/nuttx/net/uip to include/nuttx/net; Rename *_internal.h header files in net/ to just *.h 2014-06-24 10:14:15 -06:00
Gregory Nutt
37646044ac Move include/nuttx/net/uip/uip-arch.h to include/nuttx/net/netdev.h 2014-06-24 09:28:44 -06:00
Gregory Nutt
626469e30c Move include/nuttx/net/uipopt.h to include/nuttx/net/netconfig.h 2014-06-24 08:53:28 -06:00
Gregory Nutt
143959c1ed Move TCP files from net/uip to net/tcp 2014-06-18 10:18:53 -06:00