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ratelimit: redesign

Browse source 
Description of how this works in `docs/internal/RATELIMITS.ms`.

Notable implementation changes:
- KEEP_SEND_PAUSE/KEEP_SEND_HOLD and KEEP_RECV_PAUSE/KEEP_RECV_HOLD
  no longer exist. Pausing is down via blocked the new rlimits.
- KEEP_SEND_TIMED no longer exists. Pausing "100-continue" transfers
  is done in the new `Curl_http_perform_pollset()` method.
- HTTP/2 rate limiting implemented via window updates. When
  transfer initiaiting connection has a ratelimit, adjust the
  initial window size
- HTTP/3 ngtcp2 rate limitin implemnented via ack updates
- HTTP/3 quiche does not seem to support this via its API
- the default progress-meter has been improved for accuracy
  in "current speed" results.

pytest speed tests have been improved.

Closes #19384
This commit is contained in:
Stefan Eissing 2025-11-11 14:26:48 +01:00 • committed by Daniel Stenberg
parent bfde781121
commit 24b36fdd15
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
48 changed files with 1146 additions and 675 deletions
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12
lib/vssh/libssh.c
View file

@ -54,7 +54,6 @@
#include "../http.h" /* for HTTP proxy tunnel stuff */
#include "ssh.h"
#include "../url.h"
#include "../speedcheck.h"
#include "../vtls/vtls.h"
#include "../cfilters.h"
#include "../connect.h"
@ -2481,17 +2480,13 @@ static CURLcode myssh_block_statemach(struct Curl_easy *data,
while((sshc->state != SSH_STOP) && !result) {
bool block;
timediff_t left_ms = 1000;
struct curltime now = curlx_now();
result = myssh_statemach_act(data, sshc, sshp, &block);
if(result)
break;
if(!disconnect) {
if(Curl_pgrsUpdate(data))
return CURLE_ABORTED_BY_CALLBACK;
result = Curl_speedcheck(data, now);
result = Curl_pgrsCheck(data);
if(result)
break;
@ -2746,10 +2741,7 @@ static CURLcode myssh_do_it(struct Curl_easy *data, bool *done)
sshc->secondCreateDirs = 0; /* reset the create directory attempt state
variable */
Curl_pgrsSetUploadCounter(data, 0);
Curl_pgrsSetDownloadCounter(data, 0);
Curl_pgrsSetUploadSize(data, -1);
Curl_pgrsSetDownloadSize(data, -1);
Curl_pgrsReset(data);
if(conn->handler->protocol & CURLPROTO_SCP)
result = scp_perform(data, &connected, done);

11
lib/vssh/libssh2.c
View file

@ -53,7 +53,6 @@
#include "../http.h" /* for HTTP proxy tunnel stuff */
#include "ssh.h"
#include "../url.h"
#include "../speedcheck.h"
#include "../vtls/vtls.h"
#include "../cfilters.h"
#include "../connect.h"
@ -3135,10 +3134,7 @@ static CURLcode ssh_block_statemach(struct Curl_easy *data,
break;
if(!disconnect) {
if(Curl_pgrsUpdate(data))
return CURLE_ABORTED_BY_CALLBACK;
result = Curl_speedcheck(data, now);
result = Curl_pgrsCheck(data);
if(result)
break;
@ -3534,10 +3530,7 @@ static CURLcode ssh_do(struct Curl_easy *data, bool *done)
sshc->secondCreateDirs = 0; /* reset the create directory attempt state
variable */
Curl_pgrsSetUploadCounter(data, 0);
Curl_pgrsSetDownloadCounter(data, 0);
Curl_pgrsSetUploadSize(data, -1);
Curl_pgrsSetDownloadSize(data, -1);
Curl_pgrsReset(data);
if(conn->handler->protocol & CURLPROTO_SCP)
result = scp_perform(data, &connected, done);