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auto-pausing on verify callback retry

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When an application install its own OpenSSL verify callback and
that callback invokes `SSL_set_retry_verify()`, the transfer is
automatically paused and does not progress the connect attempt
any further until unpaused via `curl_easy_pause().

Added test758 to verify.

Original PR by @Natris
Reporting on libcurl mailing list
This commit is contained in:
Stefan Eissing 2025-08-14 14:12:54 +02:00
parent c24d4be057
commit c5afc28952
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7 changed files with 557 additions and 7 deletions
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10
lib/multi.c
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@ -1026,9 +1026,13 @@ CURLMcode Curl_multi_pollset(struct Curl_easy *data,
case MSTATE_CONNECTING:
case MSTATE_TUNNELING:
result = mstate_connecting_pollset(data, ps);
if(!result)
result = Curl_conn_adjust_pollset(data, data->conn, ps);
if(!Curl_xfer_recv_is_paused(data)) {
result = mstate_connecting_pollset(data, ps);
if(!result)
result = Curl_conn_adjust_pollset(data, data->conn, ps);
}
else
expect_sockets = FALSE;
break;
case MSTATE_PROTOCONNECT: