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disable caching in BIO_gethostbyname

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This commit is contained in:
Bodo Möller 2001-10-26 13:03:28 +00:00
parent b60806a097
commit e20788700c
2 changed files with 28 additions and 14 deletions
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6
CHANGES
View File

@ -4,6 +4,12 @@
Changes between 0.9.6b and 0.9.6c [XX xxx XXXX]
*) Disable caching in BIO_gethostbyname(), directly use gethostbyname()
instead. BIO_gethostbyname() does not know what timeouts are
appropriate, so entries would stay in cache even when they hade
become invalid.
[Bodo Moeller; problem pointed out by Rich Salz <rsalz@zolera.com>
*) Change ssl23_get_client_hello (ssl/s23_srvr.c) behaviour when
faced with a pathologically small ClientHello fragment that does
not contain client_version: Instead of aborting with an error,

26
crypto/bio/b_sock.c
View File

@ -345,18 +345,23 @@ static void ghbn_free(struct hostent *a)
struct hostent *BIO_gethostbyname(const char *name)
{
#if 1
/* Caching gethostbyname() results forever is wrong,
* so we have to let the true gethostbyname() worry about this */
return gethostbyname(name);
#else
struct hostent *ret;
int i,lowi=0,j;
unsigned long low= (unsigned long)-1;
/* return(gethostbyname(name)); */
#if 0 /* It doesn't make sense to use locking here: The function interface
# if 0
/* It doesn't make sense to use locking here: The function interface
* is not thread-safe, because threads can never be sure when
* some other thread destroys the data they were given a pointer to.
*/
CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
#endif
# endif
j=strlen(name);
if (j < 128)
{
@ -384,20 +389,21 @@ struct hostent *BIO_gethostbyname(const char *name)
* parameter is 'char *', instead of 'const char *'
*/
ret=gethostbyname(
#ifndef CONST_STRICT
# ifndef CONST_STRICT
(char *)
#endif
# endif
name);
if (ret == NULL)
goto end;
if (j > 128) /* too big to cache */
{
#if 0 /* If we were trying to make this function thread-safe (which
# if 0
/* If we were trying to make this function thread-safe (which
* is bound to fail), we'd have to give up in this case
* (or allocate more memory). */
ret = NULL;
#endif
# endif
goto end;
}
@ -421,12 +427,14 @@ struct hostent *BIO_gethostbyname(const char *name)
ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
}
end:
#if 0
# if 0
CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
#endif
# endif
return(ret);
#endif
}
int BIO_sock_init(void)
{
#ifdef WINDOWS