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* net.cc (cygwin_gethostbyname): Be more picky about what's a numeric address

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string, and use tls in that case too.
This commit is contained in:
Christopher Faylor
2005-02-07 15:27:40 +00:00
parent bec2abd71e
commit a694f07970
2 changed files with 18 additions and 9 deletions
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5
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,8 @@
2005-02-06 Yitzchak Scott-Thoennes <sthoenna@efn.org>
* net.cc (cygwin_gethostbyname): Be more picky about what's a numeric
address string, and use tls in that case too.
2005-02-07 Christopher Faylor <cgf@timesys.com>
* exceptions.cc: Make windows_system_directory non-static.

22
winsup/cygwin/net.cc
View File

@@ -936,17 +936,19 @@ cygwin_gethostname (char *name, size_t len)
extern "C" struct hostent *
cygwin_gethostbyname (const char *name)
{
static unsigned char tmp_addr[4];
static struct hostent tmp;
static char *tmp_aliases[1];
static char *tmp_addr_list[2];
static int a, b, c, d;
unsigned char tmp_addr[4];
struct hostent tmp, *h;
char *tmp_aliases[1] = {0};
char *tmp_addr_list[2] = {0,0};
unsigned int a, b, c, d;
char dummy;
sig_dispatch_pending ();
if (check_null_str_errno (name))
return NULL;
if (sscanf (name, "%d.%d.%d.%d", &a, &b, &c, &d) == 4)
if (sscanf (name, "%u.%u.%u.%u%c", &a, &b, &c, &d, &dummy) == 4
&& a < 256 && b < 256 && c < 256 && d < 256)
{
/* In case you don't have DNS, at least x.x.x.x still works */
memset (&tmp, 0, sizeof (tmp));
@@ -960,11 +962,13 @@ cygwin_gethostbyname (const char *name)
tmp.h_addrtype = 2;
tmp.h_length = 4;
tmp.h_addr_list = tmp_addr_list;
return &tmp;
h = &tmp;
}
else
h = gethostbyname (name);
_my_tls.locals.hostent_buf = (hostent *) dup_ent (_my_tls.locals.hostent_buf, h, is_hostent);
_my_tls.locals.hostent_buf = (hostent *) dup_ent (_my_tls.locals.hostent_buf, gethostbyname (name),
is_hostent);
if (!_my_tls.locals.hostent_buf)
{
debug_printf ("name %s", name);