/* Find network interface names and index numbers. Hurd version.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#include <error.h>
#include <net/if.h>
-#include <hurd.h>
-#include <hurd/fsys.h>
#include <string.h>
-#include <sys/mman.h>
-
-static int
-map_interfaces (int domain,
- unsigned int *idxp,
- int (*counted_initializer) (unsigned int count,
- size_t nameslen),
- int (*iterator) (const char *))
-{
- static const char ifopt[] = "--interface=";
- file_t server;
- char optsbuf[512], *opts = optsbuf, *p;
- size_t optslen = sizeof optsbuf;
- error_t err;
+#include <sys/ioctl.h>
+#include <unistd.h>
- /* Find the socket server for DOMAIN. */
- server = _hurd_socket_server (domain, 0);
- if (server == MACH_PORT_NULL)
- return 0;
-
- err = __file_get_fs_options (server, &opts, &optslen);
- if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
- {
- /* On the first use of the socket server during the operation,
- allow for the old server port dying. */
- server = _hurd_socket_server (domain, 1);
- if (server == MACH_PORT_NULL)
- return -1;
- err = __file_get_fs_options (server, &opts, &optslen);
- }
- if (err)
- return __hurd_fail (err), 0;
+#include <hurd.h>
+#include <hurd/ioctl.h>
+#include <hurd/pfinet.h>
- if (counted_initializer)
- {
- unsigned int count = 0;
- size_t nameslen = 0;
- p = memchr (opts, '\0', optslen);
- while (p != 0)
- {
- char *end = memchr (p + 1, '\0', optslen - (p - opts));
- if (end == 0)
- break;
- if (optslen - (p - opts) >= sizeof ifopt
- && !memcmp (p + 1, ifopt, sizeof ifopt - 1))
- {
- size_t len = end + 1 - (p + sizeof ifopt);
- nameslen += len > IFNAMSIZ+1 ? IFNAMSIZ+1 : len;
- ++count;
- }
- p = end;
- }
+/* Return the interface index corresponding to interface IFNAME.
+ On error, return 0. */
+unsigned int
+if_nametoindex (const char *ifname)
+{
+ struct ifreq ifr;
+ int fd = __opensock ();
- if ((*counted_initializer) (count, nameslen))
- return 0;
- }
+ if (fd < 0)
+ return 0;
- *idxp = 0;
- for (p = memchr (opts, '\0', optslen); p != 0;
- p = memchr (p + 1, '\0', optslen - (p - opts)))
+ strncpy (ifr.ifr_name, ifname, IFNAMSIZ);
+ if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
{
- ++*idxp;
- if (optslen - (p - opts) >= sizeof ifopt
- && !memcmp (p + 1, ifopt, sizeof ifopt - 1)
- && (*iterator) (p + sizeof ifopt))
- break;
+ int saved_errno = errno;
+ __close (fd);
+ if (saved_errno == EINVAL || saved_errno == ENOTTY)
+ __set_errno (ENOSYS);
+ return 0;
}
-
- if (opts != optsbuf)
- __munmap (opts, optslen);
-
- return 1;
+ __close (fd);
+ return ifr.ifr_ifindex;
}
-unsigned int
-if_nametoindex (const char *ifname)
+/* Free the structure IFN returned by if_nameindex. */
+void
+if_freenameindex (struct if_nameindex *ifn)
{
- unsigned int idx;
- int find_name (const char *name)
+ struct if_nameindex *ptr = ifn;
+ while (ptr->if_name || ptr->if_index)
{
- return !strcmp (name, ifname);
+ if (ptr->if_name)
+ free (ptr->if_name);
+ ++ptr;
}
- return map_interfaces (PF_INET, &idx, 0, &find_name) ? idx : 0;
+ free (ifn);
}
-char *
-if_indextoname (unsigned int ifindex, char *ifname)
+/* Return an array of if_nameindex structures, one for each network
+ interface present, plus one indicating the end of the array. On
+ error, return NULL. */
+struct if_nameindex *
+if_nameindex (void)
{
- unsigned int idx;
- int find_idx (const char *name)
+ error_t err = 0;
+ char data[2048];
+ file_t server;
+ int fd = __opensock ();
+ struct ifconf ifc;
+ unsigned int nifs, i;
+ struct if_nameindex *idx = NULL;
+
+ ifc.ifc_buf = data;
+ ifc.ifc_len = sizeof (data);
+
+ if (fd < 0)
+ return NULL;
+
+ server = _hurd_socket_server (PF_INET, 0);
+ if (server == MACH_PORT_NULL)
+ nifs = 0;
+ else
{
- if (idx == ifindex)
+ err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf,
+ &ifc.ifc_len);
+ if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
{
- strncpy (ifname, name, IFNAMSIZ);
- return 1;
+ /* On the first use of the socket server during the operation,
+ allow for the old server port dying. */
+ server = _hurd_socket_server (PF_INET, 1);
+ if (server == MACH_PORT_NULL)
+ goto out;
+ err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf,
+ &ifc.ifc_len);
}
- return 0;
- }
- return map_interfaces (PF_INET, &idx, 0, &find_idx) ? ifname : NULL;
-}
+ if (err)
+ goto out;
+ nifs = ifc.ifc_len / sizeof (struct ifreq);
+ }
-struct if_nameindex *
-if_nameindex (void)
-{
- unsigned int idx;
- struct if_nameindex *buf;
- char *namep;
- int alloc (unsigned int count, size_t nameslen)
+ idx = malloc ((nifs + 1) * sizeof (struct if_nameindex));
+ if (idx == NULL)
{
- buf = malloc ((sizeof buf[0] * (count + 1)) + nameslen);
- if (buf == 0)
- return 1;
- buf[count].if_index = 0;
- buf[count].if_name = NULL;
- namep = (char *) &buf[count + 1];
- return 0;
+ err = ENOBUFS;
+ goto out;
}
- int fill (const char *name)
+
+ for (i = 0; i < nifs; ++i)
{
- buf[idx - 1].if_index = idx;
- buf[idx - 1].if_name = namep;
- namep = __memccpy (namep, name, '\0', IFNAMSIZ+1) ?: &namep[IFNAMSIZ+1];
- return 0;
+ struct ifreq *ifr = &ifc.ifc_req[i];
+ idx[i].if_name = __strdup (ifr->ifr_name);
+ if (idx[i].if_name == NULL
+ || __ioctl (fd, SIOCGIFINDEX, ifr) < 0)
+ {
+ unsigned int j;
+ err = errno;
+
+ for (j = 0; j < i; ++j)
+ free (idx[j].if_name);
+ free (idx);
+ idx = NULL;
+
+ if (err == EINVAL)
+ err = ENOSYS;
+ else if (err == ENOMEM)
+ err = ENOBUFS;
+ goto out;
+ }
+ idx[i].if_index = ifr->ifr_ifindex;
}
- return map_interfaces (PF_INET, &idx, &alloc, &fill) ? buf : NULL;
+ idx[i].if_index = 0;
+ idx[i].if_name = NULL;
+
+ out:
+ __close (fd);
+ if (data != ifc.ifc_buf)
+ __vm_deallocate (__mach_task_self (), (vm_address_t) ifc.ifc_buf,
+ ifc.ifc_len);
+ __set_errno (err);
+ return idx;
}
-void
-if_freenameindex (struct if_nameindex *ifn)
+/* Store the name of the interface corresponding to index IFINDEX in
+ IFNAME (which has space for at least IFNAMSIZ characters). Return
+ IFNAME, or NULL on error. */
+char *
+if_indextoname (unsigned int ifindex, char *ifname)
{
- free (ifn);
+ struct ifreq ifr;
+ int fd = __opensock ();
+
+ if (fd < 0)
+ return NULL;
+
+ ifr.ifr_ifindex = ifindex;
+ if (__ioctl (fd, SIOCGIFNAME, &ifr) < 0)
+ {
+ int saved_errno = errno;
+ __close (fd);
+ if (saved_errno == EINVAL || saved_errno == ENOTTY)
+ __set_errno (ENOSYS);
+ else if (saved_errno == ENODEV)
+ __set_errno (ENXIO);
+ return NULL;
+ }
+ __close (fd);
+ return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
}
#if 0
projects / thirdparty / glibc.git / commitdiff
