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-rw-r--r--sysdeps/generic/ifreq.h76
-rw-r--r--sysdeps/generic/opensock.c70
-rw-r--r--sysdeps/unix/sysv/linux/if_index.c49
3 files changed, 150 insertions, 45 deletions
diff --git a/sysdeps/generic/ifreq.h b/sysdeps/generic/ifreq.h
new file mode 100644
index 0000000000..6443c0925b
--- /dev/null
+++ b/sysdeps/generic/ifreq.h
@@ -0,0 +1,76 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ Contributed by Andreas Jaeger <aj@suse.de>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+
+static inline void
+__ifreq (struct ifreq **ifreqs, int *num_ifs)
+{
+ int fd = __opensock ();
+ struct ifconf ifc;
+ int rq_len;
+ int nifs;
+# define RQ_IFS 4
+
+ if (fd < 0)
+ {
+ *num_ifs = 0;
+ *ifreqs = NULL;
+ return;
+ }
+
+ ifc.ifc_buf = NULL;
+ rq_len = RQ_IFS * sizeof (struct ifreq);
+ do
+ {
+ ifc.ifc_len = rq_len;
+ ifc.ifc_buf = realloc (ifc.ifc_buf, ifc.ifc_len);
+ if (ifc.ifc_buf == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
+ {
+ if (ifc.ifc_buf)
+ free (ifc.ifc_buf);
+
+ __close (fd);
+ *num_ifs = 0;
+ *ifreqs = NULL;
+ return;
+ }
+ rq_len *= 2;
+ }
+ while (rq_len < sizeof (struct ifreq) + ifc.ifc_len);
+
+ nifs = ifc.ifc_len / sizeof (struct ifreq);
+
+ __close (fd);
+
+ *num_ifs = nifs;
+ *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
+}
+
+
+static inline void
+__if_freereq (struct ifreq *ifreqs)
+{
+ free (ifreqs);
+}
diff --git a/sysdeps/generic/opensock.c b/sysdeps/generic/opensock.c
new file mode 100644
index 0000000000..b3e29b5794
--- /dev/null
+++ b/sysdeps/generic/opensock.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <bits/libc-lock.h>
+
+/* Return a socket of any type. The socket can be used in subsequent
+ ioctl calls to talk to the kernel. */
+int internal_function
+__opensock (void)
+{
+ /* Cache the last AF that worked, to avoid many redundant calls to
+ socket(). */
+ static int sock_af = -1;
+ int fd = -1;
+ __libc_lock_define_initialized (static, lock);
+
+ if (sock_af != -1)
+ {
+ fd = __socket (sock_af, SOCK_DGRAM, 0);
+ if (fd != -1)
+ return fd;
+ }
+
+ __libc_lock_lock (lock);
+
+ if (sock_af != -1)
+ fd = __socket (sock_af, SOCK_DGRAM, 0);
+
+ if (fd == -1)
+ {
+#ifdef AF_INET
+ fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_INET6
+ if (fd < 0)
+ fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_IPX
+ if (fd < 0)
+ fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_AX25
+ if (fd < 0)
+ fd = __socket (sock_af = AF_AX25, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_APPLETALK
+ if (fd < 0)
+ fd = __socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0);
+#endif
+ }
+
+ __libc_lock_unlock (lock);
+ return fd;
+}
diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c
index 58fb1648f2..44d310befe 100644
--- a/sysdeps/unix/sysv/linux/if_index.c
+++ b/sysdeps/unix/sysv/linux/if_index.c
@@ -35,47 +35,6 @@ static int old_siocgifconf;
# define old_siocgifconf 0
#endif
-/* Try to get a socket to talk to the kernel. */
-#if defined SIOCGIFINDEX || defined SIOCGIFNAME
-static int
-internal_function
-opensock (void)
-{
- /* Cache the last AF that worked, to avoid many redundant calls to
- socket(). */
- static int sock_af = -1;
- int fd = -1;
- __libc_lock_define_initialized (static, lock);
-
- if (sock_af != -1)
- {
- fd = __socket (sock_af, SOCK_DGRAM, 0);
- if (fd != -1)
- return fd;
- }
-
- __libc_lock_lock (lock);
-
- if (sock_af != -1)
- fd = __socket (sock_af, SOCK_DGRAM, 0);
-
- if (fd == -1)
- {
- fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
- if (fd < 0)
- fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
- if (fd < 0)
- fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
- if (fd < 0)
- fd = __socket (sock_af = AF_AX25, SOCK_DGRAM, 0);
- if (fd < 0)
- fd = __socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0);
- }
-
- __libc_lock_unlock (lock);
- return fd;
-}
-#endif
unsigned int
if_nametoindex (const char *ifname)
@@ -85,7 +44,7 @@ if_nametoindex (const char *ifname)
return 0;
#else
struct ifreq ifr;
- int fd = opensock ();
+ int fd = __opensock ();
if (fd < 0)
return 0;
@@ -124,7 +83,7 @@ if_nameindex (void)
__set_errno (ENOSYS);
return NULL;
#else
- int fd = opensock ();
+ int fd = __opensock ();
struct ifconf ifc;
unsigned int nifs, i;
int rq_len;
@@ -235,7 +194,7 @@ if_indextoname (unsigned int ifindex, char *ifname)
# endif
int status;
- fd = opensock ();
+ fd = __opensock ();
if (fd < 0)
return NULL;
@@ -285,7 +244,7 @@ void
internal_function
__protocol_available (int *have_inet, int *have_inet6)
{
- int fd = opensock ();
+ int fd = __opensock ();
unsigned int nifs;
int rq_len;
struct ifconf ifc;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 20:47:26 +0000