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.
* wget test generate bad tcp stream, test should fail but it passes instead
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.
* An example web-server implementation. This code can be used as a base
for web-based firmware uploading used by some vendors.
Modification was verified with
* firmware downloading via u-boot wget command
* fastboot over tcp
* netcat linux client
* Firefox/Chrome/Edge using example web-server implementation
Changes v2:
* cover letter was added
* some patches were removed
Changes v3:
* better cover letter
Changes v4:
* fix bug in debug output
* add more comments
* codestyle fixes
Changes v5:
* old patches were ocasionally sent with v4
* add back web-server patches
* fix bug in debug output
* add more comments
* codestyle fixes
Changes v6:
* fix the wget test
* improve description of "simplify tcp header filling code" patch
Changes v7:
* fix include ordering
* improve option descriptions
* fix a lot of extra brackets and comparisons against NULL / 0
* add empty lines before final returns
* fixed a bug with zero size httpd uploads
Changes v8:
* [tcp] add function to restart rx inactivity timeout. This may help
in the cases where remote peer waits for u-boot data, but u-boot
is busy with long executing action
* [httpd] add function returning underlying tcp stream from request id.
This (with the above change) allows avoid connection break
for the long processing post requests.
Changes v9:
* rebase all changes on top of origin/next
* update test/cmd/wget patch description (bad tcp ack/seq issue was already
fixed in origin/next)
* tcp: add rx/tx packet counters to a tcp_stream structure
* wget: use tcp rx packet counter instead of own one
* netcat: use tcp rx/tx packet counters instead of own one
Changes v10:
* netcat: fix bug appeared after rx/tx packet counter addition
* rebased on top of v2024.10
Mikhail Kshevetskiy (13):
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
test/cmd/wget: fix the test
net/tcp: simplify tcp header filling code
net/tcp: define a fallback value for rcv_wnd size
net/net: fix include ordering
net/netcat: add netcat over tcp support
net/httpd: add httpd common code
net/httpd-upload: an example web-server implementation for file
uploading
arch/sandbox/include/asm/eth.h | 4 +
cmd/Kconfig | 35 +
cmd/net.c | 55 +-
include/net.h | 7 +-
include/net/httpd-upload.h | 12 +
include/net/httpd.h | 71 ++
include/net/netcat.h | 20 +
include/net/tcp.h | 254 ++++++-
include/net/wget.h | 8 -
net/Kconfig | 14 +
net/Makefile | 3 +
net/fastboot_tcp.c | 193 +++--
net/httpd-upload.c | 170 +++++
net/httpd.c | 735 ++++++++++++++++++
net/net.c | 60 +-
net/netcat.c | 191 +++++
net/tcp.c | 1266 ++++++++++++++++++++++----------
net/wget.c | 476 ++++--------
test/cmd/wget.c | 58 +-
19 files changed, 2723 insertions(+), 909 deletions(-)
create mode 100644 include/net/httpd-upload.h
create mode 100644 include/net/httpd.h
create mode 100644 include/net/netcat.h
create mode 100644 net/httpd-upload.c
create mode 100644 net/httpd.c
create mode 100644 net/netcat.c
--
2.45.2
