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688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
196 lines
5.0 KiB
C
196 lines
5.0 KiB
C
/* Find network interface names and index numbers. Hurd version.
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Copyright (C) 2000-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <error.h>
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#include <net/if.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/ioctl.h>
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#include <hurd/pfinet.h>
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/* Return the interface index corresponding to interface IFNAME.
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On error, return 0. */
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unsigned int
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__if_nametoindex (const char *ifname)
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{
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struct ifreq ifr;
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int fd = __opensock ();
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if (fd < 0)
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return 0;
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strncpy (ifr.ifr_name, ifname, IFNAMSIZ);
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if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
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{
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int saved_errno = errno;
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__close (fd);
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if (saved_errno == EINVAL || saved_errno == ENOTTY)
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__set_errno (ENOSYS);
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return 0;
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}
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__close (fd);
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return ifr.ifr_ifindex;
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}
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libc_hidden_def (__if_nametoindex)
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weak_alias (__if_nametoindex, if_nametoindex)
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libc_hidden_weak (if_nametoindex)
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/* Free the structure IFN returned by if_nameindex. */
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void
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__if_freenameindex (struct if_nameindex *ifn)
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{
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struct if_nameindex *ptr = ifn;
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while (ptr->if_name || ptr->if_index)
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{
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free (ptr->if_name);
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++ptr;
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}
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free (ifn);
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}
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libc_hidden_def (__if_freenameindex)
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weak_alias (__if_freenameindex, if_freenameindex)
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libc_hidden_weak (if_freenameindex)
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/* Return an array of if_nameindex structures, one for each network
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interface present, plus one indicating the end of the array. On
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error, return NULL. */
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struct if_nameindex *
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__if_nameindex (void)
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{
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error_t err = 0;
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char data[2048];
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file_t server;
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int fd = __opensock ();
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struct ifconf ifc;
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unsigned int nifs, i;
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struct if_nameindex *idx = NULL;
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ifc.ifc_buf = data;
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if (fd < 0)
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return NULL;
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server = _hurd_socket_server (PF_INET, 0);
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if (server == MACH_PORT_NULL)
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nifs = 0;
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else
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{
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size_t len = sizeof data;
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err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf, &len);
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if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
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{
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/* On the first use of the socket server during the operation,
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allow for the old server port dying. */
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server = _hurd_socket_server (PF_INET, 1);
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if (server == MACH_PORT_NULL)
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goto out;
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err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf, &len);
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}
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if (err)
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goto out;
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ifc.ifc_len = len;
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nifs = len / sizeof (struct ifreq);
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}
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idx = malloc ((nifs + 1) * sizeof (struct if_nameindex));
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if (idx == NULL)
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{
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err = ENOBUFS;
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goto out;
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}
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for (i = 0; i < nifs; ++i)
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{
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struct ifreq *ifr = &ifc.ifc_req[i];
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idx[i].if_name = __strdup (ifr->ifr_name);
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if (idx[i].if_name == NULL
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|| __ioctl (fd, SIOCGIFINDEX, ifr) < 0)
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{
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unsigned int j;
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err = errno;
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for (j = 0; j < i; ++j)
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free (idx[j].if_name);
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free (idx);
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idx = NULL;
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if (err == EINVAL)
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err = ENOSYS;
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else if (err == ENOMEM)
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err = ENOBUFS;
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goto out;
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}
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idx[i].if_index = ifr->ifr_ifindex;
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}
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idx[i].if_index = 0;
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idx[i].if_name = NULL;
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out:
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__close (fd);
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if (data != ifc.ifc_buf)
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__vm_deallocate (__mach_task_self (), (vm_address_t) ifc.ifc_buf,
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ifc.ifc_len);
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__set_errno (err);
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return idx;
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}
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weak_alias (__if_nameindex, if_nameindex)
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libc_hidden_weak (if_nameindex)
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/* Store the name of the interface corresponding to index IFINDEX in
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IFNAME (which has space for at least IFNAMSIZ characters). Return
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IFNAME, or NULL on error. */
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char *
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__if_indextoname (unsigned int ifindex, char *ifname)
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{
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struct ifreq ifr;
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int fd = __opensock ();
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if (fd < 0)
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return NULL;
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ifr.ifr_ifindex = ifindex;
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if (__ioctl (fd, SIOCGIFNAME, &ifr) < 0)
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{
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int saved_errno = errno;
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__close (fd);
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if (saved_errno == EINVAL || saved_errno == ENOTTY)
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__set_errno (ENOSYS);
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else if (saved_errno == ENODEV)
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__set_errno (ENXIO);
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return NULL;
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}
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__close (fd);
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return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
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}
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weak_alias (__if_indextoname, if_indextoname)
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libc_hidden_weak (if_indextoname)
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#if 0
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void
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__protocol_available (int *have_inet, int *have_inet6)
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{
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*have_inet = _hurd_socket_server (PF_INET, 0) != MACH_PORT_NULL;
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*have_inet6 = _hurd_socket_server (PF_INET6, 0) != MACH_PORT_NULL;
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}
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#endif
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