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authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/unix/sysv/linux/if_index.c
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
downloadglibc-zack/build-layout-experiment.tar
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Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/unix/sysv/linux/if_index.c')
-rw-r--r--sysdeps/unix/sysv/linux/if_index.c241
1 files changed, 0 insertions, 241 deletions
diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c
deleted file mode 100644
index 8ba5eae781..0000000000
--- a/sysdeps/unix/sysv/linux/if_index.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* Copyright (C) 1997-2017 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
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <alloca.h>
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <net/if.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <libc-lock.h>
-#include <not-cancel.h>
-
-#include "netlinkaccess.h"
-
-
-unsigned int
-__if_nametoindex (const char *ifname)
-{
-#ifndef SIOCGIFINDEX
- __set_errno (ENOSYS);
- return 0;
-#else
- struct ifreq ifr;
- int fd = __opensock ();
-
- if (fd < 0)
- return 0;
-
- strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
- {
- int saved_errno = errno;
- close_not_cancel_no_status (fd);
- if (saved_errno == EINVAL)
- __set_errno (ENOSYS);
- return 0;
- }
- close_not_cancel_no_status (fd);
- return ifr.ifr_ifindex;
-#endif
-}
-libc_hidden_def (__if_nametoindex)
-weak_alias (__if_nametoindex, if_nametoindex)
-libc_hidden_weak (if_nametoindex)
-
-
-void
-__if_freenameindex (struct if_nameindex *ifn)
-{
- struct if_nameindex *ptr = ifn;
- while (ptr->if_name || ptr->if_index)
- {
- free (ptr->if_name);
- ++ptr;
- }
- free (ifn);
-}
-libc_hidden_def (__if_freenameindex)
-weak_alias (__if_freenameindex, if_freenameindex)
-libc_hidden_weak (if_freenameindex)
-
-
-static struct if_nameindex *
-if_nameindex_netlink (void)
-{
- struct netlink_handle nh = { 0, 0, 0, NULL, NULL };
- struct if_nameindex *idx = NULL;
-
- if (__netlink_open (&nh) < 0)
- return NULL;
-
-
- /* Tell the kernel that we wish to get a list of all
- active interfaces. Collect all data for every interface. */
- if (__netlink_request (&nh, RTM_GETLINK) < 0)
- goto exit_free;
-
- /* Count the interfaces. */
- unsigned int nifs = 0;
- for (struct netlink_res *nlp = nh.nlm_list; nlp; nlp = nlp->next)
- {
- struct nlmsghdr *nlh;
- size_t size = nlp->size;
-
- if (nlp->nlh == NULL)
- continue;
-
- /* Walk through all entries we got from the kernel and look, which
- message type they contain. */
- for (nlh = nlp->nlh; NLMSG_OK (nlh, size); nlh = NLMSG_NEXT (nlh, size))
- {
- /* Check if the message is what we want. */
- if ((pid_t) nlh->nlmsg_pid != nh.pid || nlh->nlmsg_seq != nlp->seq)
- continue;
-
- if (nlh->nlmsg_type == NLMSG_DONE)
- break; /* ok */
-
- if (nlh->nlmsg_type == RTM_NEWLINK)
- ++nifs;
- }
- }
-
- idx = malloc ((nifs + 1) * sizeof (struct if_nameindex));
- if (idx == NULL)
- {
- nomem:
- __set_errno (ENOBUFS);
- goto exit_free;
- }
-
- /* Add the interfaces. */
- nifs = 0;
- for (struct netlink_res *nlp = nh.nlm_list; nlp; nlp = nlp->next)
- {
- struct nlmsghdr *nlh;
- size_t size = nlp->size;
-
- if (nlp->nlh == NULL)
- continue;
-
- /* Walk through all entries we got from the kernel and look, which
- message type they contain. */
- for (nlh = nlp->nlh; NLMSG_OK (nlh, size); nlh = NLMSG_NEXT (nlh, size))
- {
- /* Check if the message is what we want. */
- if ((pid_t) nlh->nlmsg_pid != nh.pid || nlh->nlmsg_seq != nlp->seq)
- continue;
-
- if (nlh->nlmsg_type == NLMSG_DONE)
- break; /* ok */
-
- if (nlh->nlmsg_type == RTM_NEWLINK)
- {
- struct ifinfomsg *ifim = (struct ifinfomsg *) NLMSG_DATA (nlh);
- struct rtattr *rta = IFLA_RTA (ifim);
- size_t rtasize = IFLA_PAYLOAD (nlh);
-
- idx[nifs].if_index = ifim->ifi_index;
-
- while (RTA_OK (rta, rtasize))
- {
- char *rta_data = RTA_DATA (rta);
- size_t rta_payload = RTA_PAYLOAD (rta);
-
- if (rta->rta_type == IFLA_IFNAME)
- {
- idx[nifs].if_name = __strndup (rta_data, rta_payload);
- if (idx[nifs].if_name == NULL)
- {
- idx[nifs].if_index = 0;
- __if_freenameindex (idx);
- idx = NULL;
- goto nomem;
- }
- break;
- }
-
- rta = RTA_NEXT (rta, rtasize);
- }
-
- ++nifs;
- }
- }
- }
-
- idx[nifs].if_index = 0;
- idx[nifs].if_name = NULL;
-
- exit_free:
- __netlink_free_handle (&nh);
- __netlink_close (&nh);
-
- return idx;
-}
-
-
-struct if_nameindex *
-__if_nameindex (void)
-{
-#ifndef SIOCGIFINDEX
- __set_errno (ENOSYS);
- return NULL;
-#else
- struct if_nameindex *result = if_nameindex_netlink ();
- return result;
-#endif
-}
-weak_alias (__if_nameindex, if_nameindex)
-libc_hidden_weak (if_nameindex)
-
-
-char *
-__if_indextoname (unsigned int ifindex, char *ifname)
-{
- /* We may be able to do the conversion directly, rather than searching a
- list. This ioctl is not present in kernels before version 2.1.50. */
- struct ifreq ifr;
- int fd;
- int status;
-
- fd = __opensock ();
-
- if (fd < 0)
- return NULL;
-
- ifr.ifr_ifindex = ifindex;
- status = __ioctl (fd, SIOCGIFNAME, &ifr);
-
- close_not_cancel_no_status (fd);
-
- if (status < 0)
- {
- if (errno == ENODEV)
- /* POSIX requires ENXIO. */
- __set_errno (ENXIO);
-
- return NULL;
- }
- else
- return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
-}
-weak_alias (__if_indextoname, if_indextoname)
-libc_hidden_weak (if_indextoname)