forked from pool/glibc
25a49c19bd
Update to current head OBS-URL: https://build.opensuse.org/request/show/142184 OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=228
157 lines
3.4 KiB
Diff
157 lines
3.4 KiB
Diff
Index: glibc-2.16.90/sunrpc/bindrsvprt.c
|
|
===================================================================
|
|
--- glibc-2.16.90.orig/sunrpc/bindrsvprt.c
|
|
+++ glibc-2.16.90/sunrpc/bindrsvprt.c
|
|
@@ -29,6 +29,9 @@
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
+#include <stdio.h>
|
|
+#include <ctype.h>
|
|
+#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
@@ -42,21 +45,102 @@
|
|
*/
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
+#define STARTPORT 600
|
|
+#define LOWPORT 512
|
|
+#define ENDPORT (IPPORT_RESERVED - 1)
|
|
+#define NPORTS (ENDPORT - STARTPORT + 1)
|
|
+
|
|
+/*
|
|
+ * Read the file /etc/rpc.blacklisted, so that we don't bind
|
|
+ * to this ports.
|
|
+ */
|
|
+
|
|
+static int blacklist_read;
|
|
+static int *list;
|
|
+static int list_size = 0;
|
|
+
|
|
+static void
|
|
+load_blacklist (void)
|
|
+{
|
|
+ FILE *fp;
|
|
+ char *buf = NULL;
|
|
+ size_t buflen = 0;
|
|
+ int size = 0, ptr = 0;
|
|
+
|
|
+ __libc_lock_lock (lock);
|
|
+ blacklist_read = 1;
|
|
+
|
|
+ fp = fopen ("/etc/bindresvport.blacklist", "r");
|
|
+ if (NULL == fp)
|
|
+ return;
|
|
+
|
|
+ while (!feof_unlocked (fp))
|
|
+ {
|
|
+ unsigned long port;
|
|
+ char *tmp, *cp;
|
|
+ ssize_t n = __getline (&buf, &buflen, fp);
|
|
+ if (n < 1)
|
|
+ break;
|
|
+
|
|
+ cp = buf;
|
|
+ tmp = strchr (cp, '#'); /* remove comments */
|
|
+ if (tmp)
|
|
+ *tmp = '\0';
|
|
+ while (isspace ((int)*cp)) /* remove spaces and tabs */
|
|
+ ++cp;
|
|
+ if (*cp == '\0') /* ignore empty lines */
|
|
+ continue;
|
|
+ if (cp[strlen (cp) - 1] == '\n')
|
|
+ cp[strlen (cp) - 1] = '\0';
|
|
+
|
|
+ port = strtoul (cp, &tmp, 0);
|
|
+ while (isspace(*tmp))
|
|
+ ++tmp;
|
|
+ if (*tmp != '\0' || (port == ULONG_MAX && errno == ERANGE))
|
|
+ continue;
|
|
+
|
|
+ /* Don't bother with out-of-range ports */
|
|
+ if (port < LOWPORT || port > ENDPORT)
|
|
+ continue;
|
|
+
|
|
+ if (ptr >= size)
|
|
+ {
|
|
+ size += 10;
|
|
+ list = realloc (list, size * sizeof (int));
|
|
+ if (list == NULL)
|
|
+ {
|
|
+ free (buf);
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ list[ptr++] = port;
|
|
+ }
|
|
+
|
|
+ fclose (fp);
|
|
+
|
|
+ if (buf)
|
|
+ free (buf);
|
|
+
|
|
+ list_size = ptr;
|
|
+
|
|
+ __libc_lock_unlock (lock);
|
|
+}
|
|
+
|
|
+
|
|
/*
|
|
* Bind a socket to a privileged IP port
|
|
*/
|
|
int
|
|
bindresvport (int sd, struct sockaddr_in *sin)
|
|
{
|
|
+ static short startport = STARTPORT;
|
|
static short port;
|
|
struct sockaddr_in myaddr;
|
|
int i;
|
|
|
|
-#define STARTPORT 600
|
|
-#define LOWPORT 512
|
|
-#define ENDPORT (IPPORT_RESERVED - 1)
|
|
-#define NPORTS (ENDPORT - STARTPORT + 1)
|
|
- static short startport = STARTPORT;
|
|
+ if (!blacklist_read)
|
|
+ load_blacklist ();
|
|
|
|
if (sin == (struct sockaddr_in *) 0)
|
|
{
|
|
@@ -75,6 +159,7 @@ bindresvport (int sd, struct sockaddr_in
|
|
port = (__getpid () % NPORTS) + STARTPORT;
|
|
}
|
|
|
|
+ __set_errno (EADDRINUSE);
|
|
/* Initialize to make gcc happy. */
|
|
int res = -1;
|
|
|
|
@@ -86,12 +171,22 @@ bindresvport (int sd, struct sockaddr_in
|
|
again:
|
|
for (i = 0; i < nports; ++i)
|
|
{
|
|
- sin->sin_port = htons (port++);
|
|
- if (port > endport)
|
|
- port = startport;
|
|
+ int j;
|
|
+
|
|
+ sin->sin_port = htons (port);
|
|
+
|
|
+ /* Check, if this port is not blacklisted. */
|
|
+ for (j = 0; j < list_size; j++)
|
|
+ if (port == list[j])
|
|
+ goto try_next_port;
|
|
+
|
|
res = __bind (sd, sin, sizeof (struct sockaddr_in));
|
|
if (res >= 0 || errno != EADDRINUSE)
|
|
break;
|
|
+
|
|
+try_next_port:
|
|
+ if (++port > endport)
|
|
+ port = startport;
|
|
}
|
|
|
|
if (i == nports && startport != LOWPORT)
|