u-boot.git/include/net/tcp.h, branch master

net: Add parens to macro PSEUDO_HDR_SIZE

2025-08-01T07:30:47+00:00

Smatch reports a warning about possibly needing parens around the macro
PSEUDO_HDR_SIZE. This will not affect the one place the macro is used
but add the parens anyway as it is good practice to have them and if the
macro is used again in the future it could possibly matter then.

Signed-off-by: Andrew Goodbody 
Reviewed-by: Jerome Forissier

net/tcp: improve tcp framework, use better state machine

2024-12-28T17:59:42+00:00

Changes:
 * Fix initial send sequence always zero issue
 * Use state machine close to RFC 9293. This should make TCP
   transfers more reliable (now we can upload a huge array
   of data from the board to external server)
 * Improve TCP framework a lot. This should make tcp client
   code much more simple.
 * rewrite wget with new tcp stack
 * rewrite fastboot_tcp with new tcp stack

It's quite hard to fix the initial send sequence (ISS) issue
with the separate patch. A naive attempt to fix an issue
inside the tcp_set_tcp_header() function will break tcp packet
retransmit logic in wget and other clients.

Example:
  Wget stores tcp_seq_num value before tcp_set_tcp_header() will
  be called and (on failure) retransmit the packet with the stored
  tcp_seq_num value. Thus:
    * the same ISS must allways be used (current case)
    * or tcp clients needs to generate a proper ISS when
      required.

A proper ISS fix will require a big redesing comparable with
a this one.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net/tcp: rename ack_edge and seq_init to more common rcv_nxt and irs

2024-12-28T17:59:42+00:00

Use the names from RFC 9293

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net/tcp: add connection info to tcp_stream structure

2024-12-28T17:59:42+00:00

Changes:
 * Avoid use net_server_ip in tcp code, use tcp_stream data instead
 * Ignore packets from other connections if connection already created.
   This prevents us from connection break caused by other tcp stream.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net/tcp: put connection specific data into a tcp_stream structure

2024-12-28T17:59:42+00:00

no functional changes

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net: support being a TCP server to unblock TCP fastboot

2023-05-05T21:48:44+00:00

Make following changes to unblock TCP fastboot support:

1. Implement being a TCP server support
2. Introduce dedicated TCP traffic handler (get rid of UDP signature)
3. Ensure seq_num and ack_num are respected in net_send_tcp_packet
function (make sure existing wget_cmd code is reflected with the fix)

Signed-off-by: Dmitrii Merkurev 
Cc: Ying-Chun Liu (PaulLiu) 
Cc: Simon Glass 
Сс: Joe Hershberger 
Сс: Ramon Fried 
Reviewed-by: Ying-Chun Liu (PaulLiu) 
Reviewed-by: Simon Glass 
Reviewed-by: Ramon Fried

net: Add TCP protocol

2022-11-28T18:06:39+00:00

Currently file transfers are done using tftp or NFS both
over udp. This requires a request to be sent from client
(u-boot) to the boot server.

The current standard is TCP with selective acknowledgment.

Signed-off-by: Duncan Hare 
Signed-off-by: Duncan Hare 
Signed-off-by: Ying-Chun Liu (PaulLiu) 
Reviewed-by: Simon Glass 
Cc: Christian Gmeiner 
Cc: Joe Hershberger 
Cc: Michal Simek 
Cc: Ramon Fried 
Reviewed-by: Ramon Fried