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[crypto,tls] fix bad-function-cast

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do silence the compiler warning and add a comment why we do that.
This commit is contained in:
akallabeth 2024-09-04 09:41:53 +02:00
parent c851dfcb7f
commit 3e933203e2
1 changed files with 16 additions and 2 deletions
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18
libfreerdp/crypto/tls.c
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@ -309,8 +309,22 @@ static long bio_rdp_tls_ctrl(BIO* bio, int cmd, long num, void* ptr)
break;
case BIO_CTRL_GET_CALLBACK:
*((ULONG_PTR*)ptr) = (ULONG_PTR)SSL_get_info_callback(tls->ssl);
status = 1;
/* The OpenSSL API is horrible here:
* we get a function pointer returned and have to cast it to ULONG_PTR
* to return the value to the caller.
*
* This, of course, is something compilers warn about. So silence it by casting
* by the means of a union */
{
union
{
void (*fkt)(const SSL*, int, int);
ULONG_PTR uptr;
} cnv;
cnv.fkt = SSL_get_info_callback(tls->ssl);
*((ULONG_PTR*)ptr) = cnv.uptr;
status = 1;
}
break;
case BIO_C_SSL_MODE: