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Re: Above and beyond 32 protocols

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From: Daniel Stenberg via curl-library <curl-library_at_lists.haxx.se>
Date: Wed, 29 Sep 2021 00:35:57 +0200 (CEST)

On Tue, 28 Sep 2021, Ray Satiro via curl-library wrote:

> and in CURLOPT_PROTOCOLS setopt:
>
> long allowed_protocols = va_arg(param, long);
>
> if((allowed_protocols&CURLPROTO_EXTENDED_FLAG) && allowed_protocols !=
> CURLPROTO_ALL)
> � /* problem */

Since we would also get the problem if we set CURLPROTO_FOO *only*, the check
would probably have to be:

#if SIZEOF_LONG < SIZEOF_CURL_OFF_T
if(allowed_protocols&CURLPROTO_EXTENDED_FLAG)
return ERROR;
#endif

... but, this also then assumes that it will actually read the *correct* 4
bytes from the 8 that were pushed on the stack and I don't think it is
guaranteed in the C language so there's a risk that the check won't work.

-- 
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Received on 2021-09-29

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