RFC2001: TCP Slow Start, Congestion Avoidance, Fast Retransmit,
and Fast Recovery Algorithms
...
3. Fast Retransmit
Modifications to the congestion avoidance algorithm were proposed in
1990 [3]. Before describing the change, realize that TCP may
generate an immediate acknowledgment (a duplicate ACK) when an out-
of-order segment is received (Section 4.2.2.21 of [1], with a note
that one reason for doing so was for the experimental fast-
retransmit algorithm). This duplicate ACK should not be delayed.
The purpose of this duplicate ACK is to let the other end know that a
segment was received out of order, and to tell it what sequence
number is expected.
Since TCP does not know whether a duplicate ACK is caused by a lost
segment or just a reordering of segments, it waits for a small number
of duplicate ACKs to be received. It is assumed that if there is
just a reordering of the segments, there will be only one or two
duplicate ACKs before the reordered segment is processed, which will
then generate a new ACK. If three or more duplicate ACKs are
received in a row, it is a strong indication that a segment has been
lost. TCP then performs a retransmission of what appears to be the
missing segment, without waiting for a retransmission timer to
expire.
Change-Id: Ie2cbcecab507c3d831f74390a6a85e0c5c8e0652
Signed-off-by: chao.an <anchao@xiaomi.com>
The number of available iobs is already sub in iob_navail(true) on line 114
net/tcp/tcp_recvwindow.c:
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73 uint16_t tcp_get_recvwindow(FAR struct net_driver_s *dev)
...
114 niob_avail = iob_navail(true);
Change-Id: I230927904d8db08ed8d95d7fa18c5c5fce08aa5e
Signed-off-by: chao.an <anchao@xiaomi.com>
N/A
Do not use the special getopt patch and use getopt for nuttx
mainline instead.
Change-Id: I388944cd0a0cfaa64e251ad5565fd8eb8c4e609a
Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>
arch/arm/src/stm32/stm32_oneshot.c:
arch/arm/src/stm32/stm32_oneshot.h:
arch/arm/src/stm32/stm32_oneshot_lowerhalf.c:
arch/arm/src/stm32/stm32_dbgmcu.h:
* Fix nxstyle errors.
arch/arm/src/stm32/stm32_lsi.c:
* Fix nxstyle errors.
* Also a minor grammar fix in a comment: add "in" to "setting the
LSION bit in the RCC CSR register."
N/A
Top dir is the parent directory of nuttx, if called build.sh from top
dir, we should also update the custom build path. And here convert to
absolute path.
Change-Id: Id6d2325b41ee792dbf9d4bb52654d6108c2bc67a
Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>
MIRTOS-267
net device buffer overflow if the icmp packet is too large
Change-Id: If0e6c039b99e064a122672d64eb057347ae3c053
Signed-off-by: chao.an <anchao@xiaomi.com>
stm32f7, stm32h7, stm32l4 and stm32f0l0g0 do it this way and there is no
reason for classic stm32 to differ. Also manipulation of priv->ie was not
atomic with respect to interrupts.
Signed-off-by: Juha Niskanen <juha.niskanen@haltian.com>
The following nxstyle errors are known.
They are a part of the copyright notice.
net/igmp/igmp_poll.c:22:82: error: Long line found
net/igmp/igmp_poll.c:29:82: error: Long line found
The following nxstyle errors are known.
They are a part of the copyright notice.
net/igmp/igmp_mcastmac.c:22:82: error: Long line found
net/igmp/igmp_mcastmac.c:29:82: error: Long line found
The following nxstyle errors are intentionally left
because they are a part of the copyright notice.
net/igmp/igmp_join.c:22:82: error: Long line found
net/igmp/igmp_join.c:29:82: error: Long line found
Right now if usb tracing is enabled but verbose is disabled
a debug assert will be triggered when ever a verbose trace point
is hit. Instead of trying to print the NULL message, just return
early.
Signed-off-by: Brennan Ashton <bashton@brennanashton.com>
Summary:
- This patch change the data type of buflen in qspi_meminfo_s
- from uint16_t to uint32_t to allow data size greater than 64KB.
Impact:
- QSPI & some flash like s25fl1 etc
Testing:
- Tested with rm69330 oled controller on custom board
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
chao.an
liuhaitao
ligd
Nathan Hartman
Masayuki Ishikawa
Matias N
Alin Jerpelea
dongjiuzhu
Juha Niskanen
YAMAMOTO Takashi
Brennan Ashton
Huang Qi