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multi: fix polling with pending input

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When multi creates the pollset of a transfer, it checks now if
a connection (FIRST/SECONDARY) socket waits on POLLIN and has input data
pending in filters (relevant to OpenSSL's new read ahead). If so, it
triggers a timeout on the transfer via EXPIRE_RUN_NOW.

This fixes sporadic stalls in test 988 when running event based.

Closes #17636
This commit is contained in:
Stefan Eissing 2025-06-16 12:19:52 +02:00 • committed by Viktor Szakats
parent 739c09c8a4
commit 62349e45a8
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3 changed files with 32 additions and 0 deletions
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13
lib/cfilters.c
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@ -1069,3 +1069,16 @@ void Curl_pollset_check(struct Curl_easy *data,
}
*pwant_read = *pwant_write = FALSE;
}
bool Curl_pollset_want_read(struct Curl_easy *data,
struct easy_pollset *ps,
curl_socket_t sock)
{
unsigned int i;
(void)data;
for(i = 0; i < ps->num; ++i) {
if((ps->sockets[i] == sock) && (ps->actions[i] & CURL_POLL_IN))
return TRUE;
}
return FALSE;
}