This implementation supports only IPv4.
* inet/ifaddrs.h: New file.
* sysdeps/generic/ifaddrs.c: New file.
* sysdeps/gnu/ifaddrs.c: New file.
* inet/test-ifaddrs.c: New file.
* inet/Makefile (routines): Add ifaddrs.
(headers): Add ifaddrs.h here.
(tests): Add test-ifaddrs.
* inet/Versions (GLIBC_2.3): New set, add getifaddrs and freeifaddrs.
* resolv/res_hconf.c (_res_hconf_reorder_addrs): Use an explicit
socket call to get an AF_INET socket, instead of using __opensock.
The SIOCGIFNETMASK ioctl will work only with a PF_INET socket.
* sysdeps/generic/ifreq.h (__ifreq): Take third argument SOCKFD,
if not -1 use it instead of calling __opensock.
* sysdeps/unix/sysv/linux/ifreq.h (__ifreq): Likewise.
* sysdeps/mach/hurd/ifreq.h (__ifreq): Take new argument and ignore it.
* resolv/res_hconf.c (_res_hconf_reorder_addrs): Pass new argument.
* sysdeps/mach/hurd/ifreq.h: New file.
* sysdeps/generic/ifreq.h (__if_freereq): Take second argument NUM_IFS.
* sysdeps/unix/sysv/linux/ifreq.h (__if_freereq): Likewise.
* resolv/res_hconf.c (_res_hconf_reorder_addrs): Update caller.
2002-07-24 Roland McGrath <roland@frob.com>
+ Added <ifaddrs.h> interface with functions `getifaddrs', `freeifaddrs'.
+ This implementation supports only IPv4.
+ * inet/ifaddrs.h: New file.
+ * sysdeps/generic/ifaddrs.c: New file.
+ * sysdeps/gnu/ifaddrs.c: New file.
+ * inet/test-ifaddrs.c: New file.
+ * inet/Makefile (routines): Add ifaddrs.
+ (headers): Add ifaddrs.h here.
+ (tests): Add test-ifaddrs.
+ * inet/Versions (GLIBC_2.3): New set, add getifaddrs and freeifaddrs.
+
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Use an explicit
+ socket call to get an AF_INET socket, instead of using __opensock.
+ The SIOCGIFNETMASK ioctl will work only with a PF_INET socket.
+
+ * sysdeps/generic/ifreq.h (__ifreq): Take third argument SOCKFD,
+ if not -1 use it instead of calling __opensock.
+ * sysdeps/unix/sysv/linux/ifreq.h (__ifreq): Likewise.
+ * sysdeps/mach/hurd/ifreq.h (__ifreq): Take new argument and ignore it.
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Pass new argument.
+
+ * sysdeps/mach/hurd/ifreq.h: New file.
+ * sysdeps/generic/ifreq.h (__if_freereq): Take second argument NUM_IFS.
+ * sysdeps/unix/sysv/linux/ifreq.h (__if_freereq): Likewise.
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Update caller.
+
* libio/fileops.c (_IO_file_seekoff_mmap): Don't rely on FP->_offset,
which gets moved around. Calculate size of mmap'd buffer instead.
-# Copyright (C) 1991-1999, 2000, 2001 Free Software Foundation, Inc.
+# Copyright (C) 1991-1999,2000,01,02 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
headers := netinet/ether.h netinet/in.h netinet/in_systm.h \
netinet/if_ether.h \
netinet/tcp.h netinet/ip.h $(wildcard arpa/*.h protocols/*.h) \
- aliases.h netinet/ip6.h netinet/icmp6.h bits/in.h
+ aliases.h ifaddrs.h netinet/ip6.h netinet/icmp6.h bits/in.h
distribute := netgroup.h
rcmd rexec ruserpass \
getnetgrent_r getnetgrent \
getaliasent_r getaliasent getaliasname getaliasname_r \
- in6_addr getnameinfo if_index
+ in6_addr getnameinfo if_index ifaddrs
tests := htontest test_ifindex tst-ntoa tst-ether_aton tst-network \
- tst-gethnm
+ tst-gethnm test-ifaddrs
include ../Rules
# r*
rcmd_af; rexec_af; rresvport_af; ruserok_af;
}
+ GLIBC_2.3 {
+ # f*
+ freeifaddrs;
+ # g*
+ getifaddrs;
+ }
GLIBC_PRIVATE {
# functions used in other libraries
__internal_endnetgrent; __internal_getnetgrent_r;
--- /dev/null
+/* ifaddrs.h -- declarations for getting network interface addresses
+ Copyright (C) 2002 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _IFADDRS_H
+#define _IFADDRS_H 1
+
+#include <features.h>
+#include <sys/socket.h>
+
+__BEGIN_DECLS
+
+/* The `getifaddrs' function generates a linked list of these structures.
+ Each element of the list describes one network interface. */
+struct ifaddrs
+{
+ struct ifaddrs *ifa_next; /* Pointer to the next structure. */
+
+ char *ifa_name; /* Name of this network interface. */
+ unsigned int ifa_flags; /* Flags as from SIOCGIFFLAGS ioctl. */
+
+ struct sockaddr *ifa_addr; /* Network address of this interface. */
+ struct sockaddr *ifa_netmask; /* Netmask of this interface. */
+ union
+ {
+ /* At most one of the following two is valid. If the IFF_BROADCAST
+ bit is set in `ifa_flags', then `ifa_broadaddr' is valid. If the
+ IFF_POINTOPOINT bit is set, then `ifa_dstaddr' is valid.
+ It is never the case that both these bits are set at once. */
+ struct sockaddr *ifu_broadaddr; /* Broadcast address of this interface. */
+ struct sockaddr *ifu_dstaddr; /* Point-to-point destination address. */
+ } ifa_ifu;
+ /* These very same macros are defined by <net/if.h> for `struct ifaddr'.
+ So if they are defined already, the existing definitions will be fine. */
+# ifndef ifa_broadaddr
+# define ifa_broadaddr ifa_ifu.ifu_broadaddr
+# endif
+# ifndef ifa_dstaddr
+# define ifa_dstaddr ifa_ifu.ifu_dstaddr
+# endif
+
+ void *ifa_data; /* Address-specific data (may be unused). */
+};
+
+
+/* Create a linked list of `struct ifaddrs' structures, one for each
+ network interface on the host machine. If successful, store the
+ list in *IFAP and return 0. On errors, return -1 and set `errno'.
+
+ The storage returned in *IFAP is allocated dynamically and can
+ only be properly freed by passing it to `freeifaddrs'. */
+extern int getifaddrs (struct ifaddrs **__ifap) __THROW;
+
+/* Reclaim the storage allocated by a previous `getifaddrs' call. */
+extern void freeifaddrs (struct ifaddrs *__ifa) __THROW;
+
+__END_DECLS
+
+#endif /* ifaddrs.h */
--- /dev/null
+/* Test listing of network interface addresses.
+ Copyright (C) 2002 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ifaddrs.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+int
+main (void)
+{
+ int failures = 0;
+ struct ifaddrs *ifaces, *ifa;
+
+ if (getifaddrs (&ifaces) < 0)
+ {
+ if (errno != ENOSYS)
+ {
+ printf ("Couldn't get any interfaces: %s.\n", strerror (errno));
+ exit (1);
+ }
+ /* The function is simply not implemented. */
+ exit (0);
+ }
+
+ puts ("\
+Name Flags Address Netmask Broadcast/Destination");
+
+ for (ifa = ifaces; ifa != NULL; ifa = ifa->ifa_next)
+ {
+ char abuf[64], mbuf[64], dbuf[64];
+ inline const char *addr_string (struct sockaddr *sa, char *buf)
+ {
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ return inet_ntop (AF_INET,
+ &((struct sockaddr_in *) sa)->sin_addr,
+ buf, sizeof abuf);
+ case AF_INET6:
+ return inet_ntop (AF_INET6,
+ &((struct sockaddr_in6 *) sa)->sin6_addr,
+ buf, sizeof abuf);
+ case AF_UNSPEC:
+ return "---";
+ default:
+ ++failures;
+ printf ("sa_family=%d %08x\n", sa->sa_family,
+ *(int*)&((struct sockaddr_in *) sa)->sin_addr.s_addr);
+ return "<unexpected sockaddr family>";
+ }
+ }
+ printf ("%-15s%#.4x %-15s %-15s %-15s\n",
+ ifa->ifa_name, ifa->ifa_flags,
+ addr_string (ifa->ifa_addr, abuf),
+ addr_string (ifa->ifa_netmask, mbuf),
+ addr_string (ifa->ifa_broadaddr, dbuf));
+ }
+
+ freeifaddrs (ifaces);
+
+ return failures ? 1 : 0;
+}
num_ifs = 0;
- sd = __opensock ();
+ /* The SIOCGIFNETMASK ioctl will only work on an AF_INET socket. */
+ sd = __socket (AF_INET, SOCK_DGRAM, 0);
if (sd < 0)
return;
__libc_lock_lock (lock);
/* Get a list of interfaces. */
- __ifreq (&ifr, &num);
+ __ifreq (&ifr, &num, sd);
if (!ifr)
goto cleanup;
ifaddrs = realloc (ifaddrs, num_ifs * sizeof (ifaddrs[0]));
cleanup1:
- __if_freereq (ifr);
+ __if_freereq (ifr, num);
cleanup:
/* Release lock, preserve error value, and close socket. */
--- /dev/null
+/* getifaddrs -- get names and addresses of all network interfaces
+ Copyright (C) 2002 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <ifaddrs.h>
+#include <errno.h>
+#include <stdlib.h>
+
+/* Create a linked list of `struct ifaddrs' structures, one for each
+ network interface on the host machine. If successful, store the
+ list in *IFAP and return 0. On errors, return -1 and set `errno'. */
+int
+getifaddrs (struct ifaddrs **ifap)
+{
+ __set_errno (ENOSYS);
+ return -1;
+}
+stub_warning (getifaddrs)
+
+void
+freeifaddrs (struct ifaddrs *ifa)
+{
+ if (ifa == NULL)
+ return; /* a la free, why not? */
+
+ /* Can't be called properly if getifaddrs never succeeded. */
+ abort ();
+}
+stub_warning (freeifaddrs)
-/* Copyright (C) 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1999,2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>.
static inline void
-__ifreq (struct ifreq **ifreqs, int *num_ifs)
+__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
{
- int fd = __opensock ();
+ int fd = sockfd;
struct ifconf ifc;
int rq_len;
int nifs;
# define RQ_IFS 4
if (fd < 0)
+ fd = __opensock ();
+ if (fd < 0)
{
*num_ifs = 0;
*ifreqs = NULL;
{
if (ifc.ifc_buf)
free (ifc.ifc_buf);
-
- __close (fd);
+
+ if (fd != sockfd)
+ __close (fd);
*num_ifs = 0;
*ifreqs = NULL;
return;
nifs = ifc.ifc_len / sizeof (struct ifreq);
- __close (fd);
+ if (fd != sockfd)
+ __close (fd);
*num_ifs = nifs;
*ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
static inline void
-__if_freereq (struct ifreq *ifreqs)
+__if_freereq (struct ifreq *ifreqs, int num_ifs)
{
free (ifreqs);
}
--- /dev/null
+/* getifaddrs -- get names and addresses of all network interfaces
+ Copyright (C) 2002 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <ifaddrs.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <netinet/in.h>
+
+#include "ifreq.h"
+
+/* Create a linked list of `struct ifaddrs' structures, one for each
+ network interface on the host machine. If successful, store the
+ list in *IFAP and return 0. On errors, return -1 and set `errno'. */
+int
+getifaddrs (struct ifaddrs **ifap)
+{
+ /* This implementation handles only IPv4 interfaces.
+ The various ioctls below will only work on an AF_INET socket.
+ Some different mechanism entirely must be used for IPv6. */
+ int fd = __socket (AF_INET, SOCK_DGRAM, 0);
+ struct ifreq *ifreqs;
+ int nifs, i;
+
+ if (fd < 0)
+ return -1;
+
+ __ifreq (&ifreqs, &nifs, fd);
+ if (ifreqs == NULL) /* XXX doesn't distinguish error vs none */
+ {
+ __close (fd);
+ return -1;
+ }
+
+ /* Now we have the list of interfaces and each one's address.
+ Put it into the expected format and fill in the remaining details. */
+ if (nifs == 0)
+ *ifap = NULL;
+ else
+ {
+ struct
+ {
+ struct ifaddrs ia;
+ struct sockaddr addr, netmask, broadaddr;
+ char name[IF_NAMESIZE];
+ } *storage;
+
+ storage = malloc (nifs * sizeof storage[0]);
+ if (storage == NULL)
+ {
+ __close (fd);
+ __if_freereq (ifreqs, nifs);
+ return -1;
+ }
+
+ i = 0;
+ do
+ {
+ struct ifreq *const ifr = &ifreqs[i];
+
+ /* Fill in all pointers to the storage we've already allocated. */
+ storage[i].ia.ifa_next = &storage[i + 1].ia;
+ storage[i].ia.ifa_addr = &storage[i].addr;
+ storage[i].ia.ifa_netmask = &storage[i].netmask;
+ storage[i].ia.ifa_broadaddr = &storage[i].broadaddr; /* & dstaddr */
+
+ /* Now copy the information we already have from SIOCGIFCONF. */
+ storage[i].ia.ifa_name = strncpy (storage[i].name, ifr->ifr_name,
+ sizeof storage[i].name);
+ storage[i].addr = ifr->ifr_addr;
+
+ /* The SIOCGIFCONF call filled in only the name and address.
+ Now we must also ask for the other information we need. */
+
+ if (__ioctl (fd, SIOCGIFFLAGS, ifr) < 0)
+ break;
+ storage[i].ia.ifa_flags = ifr->ifr_flags;
+
+ ifr->ifr_addr = storage[i].addr;
+ if (__ioctl (fd, SIOCGIFNETMASK, ifr) < 0)
+ break;
+ storage[i].netmask = ifr->ifr_netmask;
+
+ if (ifr->ifr_flags & IFF_BROADCAST)
+ {
+ ifr->ifr_addr = storage[i].addr;
+ if (__ioctl (fd, SIOCGIFBRDADDR, ifr) < 0)
+ break;
+ storage[i].broadaddr = ifr->ifr_broadaddr;
+ }
+ else if (ifr->ifr_flags & IFF_POINTOPOINT)
+ {
+ ifr->ifr_addr = storage[i].addr;
+ if (__ioctl (fd, SIOCGIFDSTADDR, ifr) < 0)
+ break;
+ storage[i].broadaddr = ifr->ifr_dstaddr;
+ }
+ else
+ /* Just 'cause. */
+ memset (&storage[i].broadaddr, 0, sizeof storage[i].broadaddr);
+
+ storage[i].ia.ifa_data = NULL; /* Nothing here for now. */
+
+ } while (++i < nifs);
+ if (i < nifs) /* Broke out early on error. */
+ {
+ __close (fd);
+ free (storage);
+ __if_freereq (ifreqs, nifs);
+ return -1;
+ }
+ storage[i - 1].ia.ifa_next = NULL;
+
+ *ifap = &storage[0].ia;
+
+ __close (fd);
+ __if_freereq (ifreqs, nifs);
+ }
+
+ return 0;
+}
+
+void
+freeifaddrs (struct ifaddrs *ifa)
+{
+ free (ifa);
+}
--- /dev/null
+/* Fetch the host's network interface list. Hurd version.
+ Copyright (C) 2002 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <net/if.h>
+#include <hurd.h>
+#include <hurd/pfinet.h>
+#include <sys/socket.h>
+#include <sys/mman.h>
+
+
+static inline void
+__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
+{
+ struct ifconf ifc;
+ file_t server;
+
+ server = _hurd_socket_server (PF_INET, 0);
+ if (server == MACH_PORT_NULL)
+ {
+ out:
+ *num_ifs = 0;
+ *ifreqs = NULL;
+ }
+ else
+ {
+ char *data = NULL;
+ size_t len = 0;
+ error_t err = __pfinet_siocgifconf (server, -1, &data, &len);
+ 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 (PF_INET, 1);
+ if (server == MACH_PORT_NULL)
+ goto out;
+ err = __pfinet_siocgifconf (server, -1, ifreqs, &len);
+ }
+ if (err)
+ goto out;
+
+ if (len % sizeof (struct ifreq) != 0)
+ {
+ munmap (data, len);
+ errno = EGRATUITOUS;
+ goto out;
+ }
+ *num_ifs = len / sizeof (struct ifreq);
+ *ifreqs = (struct ifreq *) data;
+ }
+
+}
+
+
+static inline void
+__if_freereq (struct ifreq *ifreqs, int num_ifs)
+{
+ munmap (ifreqs, num_ifs * sizeof (struct ifreq))
+}
-/* Copyright (C) 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1999,2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>.
static inline void
-__ifreq (struct ifreq **ifreqs, int *num_ifs)
+__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
{
- int fd = __opensock ();
+ int fd = sockfd;
struct ifconf ifc;
int rq_len;
int nifs;
# define RQ_IFS 4
if (fd < 0)
+ fd = __opensock ();
+ if (fd < 0)
{
*num_ifs = 0;
*ifreqs = NULL;
return;
}
-
+
ifc.ifc_buf = NULL;
/* We may be able to get the needed buffer size directly, rather than
{
if (ifc.ifc_buf)
free (ifc.ifc_buf);
-
- __close (fd);
+
+ if (fd != sockfd)
+ __close (fd);
*num_ifs = 0;
*ifreqs = NULL;
while (ifc.ifc_len == rq_len && old_siocgifconf);
nifs = ifc.ifc_len / sizeof (struct ifreq);
- __close (fd);
+
+ if (fd != sockfd)
+ __close (fd);
*num_ifs = nifs;
*ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
}
static inline void
-__if_freereq (struct ifreq *ifreqs)
+__if_freereq (struct ifreq *ifreqs, int num_ifs)
{
free (ifreqs);
}
projects / platform / upstream / glibc.git / commitdiff