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quiche: set the max field section size

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quiche 0.29.3 started enforcing a default
`SETTINGS_MAX_FIELD_SECTION_SIZE` of 32 KiB, so larger response headers
now shut down the whole connection with `CURLE_HTTP3`. curl accepts up
to 300 KiB of response headers with every other backend and HTTP
version. Tell quiche to allow what curl itself allows. This keeps
test_01_11 passing with quiche 0.29.3 and it also advertises our real
limit to servers, which the RFC encourages.

Ref: 899e2edec9 #22333
Ref: #22329
Ref: #22325
Ref: 9be0e4fa18
Ref: https://github.com/cloudflare/quiche/releases/tag/0.29.3

Closes #22331
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Graham Campbell 2026-07-15 12:52:21 +01:00 • committed by Viktor Szakats
parent 899e2edec9
commit f369c7ba43
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5
lib/vquic/cf-quiche.c
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@ -40,6 +40,7 @@
#include "connect.h"
#include "progress.h"
#include "select.h"
#include "http.h"
#include "http1.h"
#include "sockaddr.h"
#include "vquic/vquic.h"
@ -1429,6 +1430,10 @@ static CURLcode cf_quiche_connect(struct Curl_cfilter *cf,
result = CURLE_OUT_OF_MEMORY;
goto out;
}
/* quiche 0.29.3+ rejects response headers larger than 32 KiB by
default. Allow as much as curl itself accepts. */
quiche_h3_config_set_max_field_section_size(ctx->h3config,
MAX_HTTP_RESP_HEADER_SIZE);
/* Create a new HTTP/3 connection on the QUIC connection. */
ctx->h3c = quiche_h3_conn_new_with_transport(ctx->qconn, ctx->h3config);