U-Boot support of LWIP is not ready for a moment, but we already have
some kind of tcp support. Unfrotunately this support is really bad.
Some of the known issues:
* tcp packet from other connection can break a current one
* tcp send sequence always starts from zero
* bad tcp options processing
* strange assumptions on packet size for selectiv acknowledge
* tcp interface assumes one of the two scenarios:
- data downloading from remote host to a board
- request-response exchange with a small packets
so it's not possible to upload large amount of data from the
board to remote host.
This series of patches fixes all of the above issuess.
The benefits:
* A lot of bug was fixed
* Better and more reliable TCP state machine
* Tcp cliens becomes smaller/simpler
* Data uploading was fixed (now it's possible to transmit a huge amount of
data from the board to remote host)
* Netcat over tcp was implemented. Netcat supports data downloading/uploading
from/to remote host in client/server mode.
On the base of this changes a HTTPD/1.1 server for firmware upgrade was
implemented (not included in this patch series).
Modification was verified with
* firmware downloading via u-boot wget command
* fastboot over tcp
* netcat linux client
* Firefox/Chrome/Edge during web-based firmware upgrade
Changes v2:
* cover letter was added
* some patches were removed
Changes v3:
* better cover letter
Mikhail Kshevetskiy (9):
net/tcp: fix TCP options processing
net/tcp: fix selective acknowledge
net/tcp: put connection specific data into a tcp_stream structure
net/tcp: add connection info to tcp_stream structure
net/tcp: rename ack_edge and seq_init to more common rcv_nxt and irs
net/tcp: improve tcp framework, use better state machine
net/tcp: simplify tcp header filling code
net/tcp: define a fallback value for rcv_wnd size
net/netcat: add netcat over tcp support
cmd/Kconfig | 7 +
cmd/net.c | 34 +-
include/net.h | 7 +-
include/net/netcat.h | 20 +
include/net/tcp.h | 227 +++++++-
include/net/wget.h | 8 -
net/Makefile | 1 +
net/fastboot_tcp.c | 190 +++----
net/net.c | 30 +-
net/netcat.c | 159 ++++++
net/tcp.c | 1253 +++++++++++++++++++++++++++++-------------
net/wget.c | 479 +++++-----------
12 files changed, 1538 insertions(+), 877 deletions(-)
create mode 100644 include/net/netcat.h
create mode 100644 net/netcat.c
--
2.39.2
