+++ /dev/null
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-Date: Tue, 31 Oct 2006 12:37:08 -0500
-From: Daniel Jacobowitz <drow at false dot org>
-To: Mike Frysinger <vapier at gentoo dot org>
-Cc: libc-ports at sourceware dot org, Philip Balister <philip dot balister at gmail dot com>
-Subject: Re: Problem with glibc-2.5 on ARM
-Message-ID: <20061031173708.GJ20468@nevyn.them.org>
-References: <499146270610241149ibe030e0nd9d6b177a95b346e@mail.gmail.com> <499146270610241254u7cadf63ej2edf05cedbc5266f@mail.gmail.com> <20061024195837.GA20181@nevyn.them.org> <200610291954.27022.vapier@gentoo.org>
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-
-On Sun, Oct 29, 2006 at 07:54:25PM -0500, Mike Frysinger wrote:
-> On Tuesday 24 October 2006 15:58, Daniel Jacobowitz wrote:
-> > ARM is going to need a slightly different version of that file, I
-> > guess.
->
-> would declaring req with attribute packed not help ?
-> -mike
-
-Nope. "struct rtgenmsg" would still have size 4.
-
-Philip, are you still at all interested in this for the old ABI?
-I don't have time to test this patch right now, but I think it
-will work.
-
---
-Daniel Jacobowitz
-CodeSourcery
-
-2006-10-31 Daniel Jacobowitz <dan@codesourcery.com>
-
- * sysdeps/unix/sysv/linux/arm/check_pf.c: New file.
- * sysdeps/unix/sysv/linux/arm/eabi/check_pf.c: New file.
-
-Index: sysdeps/unix/sysv/linux/arm/check_pf.c
-===================================================================
-RCS file: sysdeps/unix/sysv/linux/arm/check_pf.c
-diff -N sysdeps/unix/sysv/linux/arm/check_pf.c
---- /dev/null 1 Jan 1970 00:00:00 -0000
-+++ sysdeps/unix/sysv/linux/arm/check_pf.c 31 Oct 2006 17:29:58 -0000
-@@ -0,0 +1,274 @@
-+/* Determine protocol families for which interfaces exist. ARM Linux version.
-+ Copyright (C) 2003, 2006 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 <assert.h>
-+#include <errno.h>
-+#include <ifaddrs.h>
-+#include <netdb.h>
-+#include <stddef.h>
-+#include <string.h>
-+#include <time.h>
-+#include <unistd.h>
-+#include <sys/socket.h>
-+
-+#include <asm/types.h>
-+#include <linux/netlink.h>
-+#include <linux/rtnetlink.h>
-+
-+#include <not-cancel.h>
-+#include <kernel-features.h>
-+
-+
-+#ifndef IFA_F_TEMPORARY
-+# define IFA_F_TEMPORARY IFA_F_SECONDARY
-+#endif
-+#ifndef IFA_F_HOMEADDRESS
-+# define IFA_F_HOMEADDRESS 0
-+#endif
-+
-+
-+static int
-+make_request (int fd, pid_t pid, bool *seen_ipv4, bool *seen_ipv6,
-+ struct in6addrinfo **in6ai, size_t *in6ailen)
-+{
-+ struct req
-+ {
-+ struct nlmsghdr nlh;
-+ struct rtgenmsg g;
-+ } req;
-+ struct sockaddr_nl nladdr;
-+
-+ /* struct rtgenmsg consists of a single byte but the ARM ABI rounds
-+ it up to a word. Clear the padding explicitly here. */
-+ assert (sizeof (req.g) == 4);
-+ memset (&req.g, '\0', sizeof (req.g));
-+
-+ req.nlh.nlmsg_len = sizeof (req);
-+ req.nlh.nlmsg_type = RTM_GETADDR;
-+ req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST;
-+ req.nlh.nlmsg_pid = 0;
-+ req.nlh.nlmsg_seq = time (NULL);
-+ req.g.rtgen_family = AF_UNSPEC;
-+
-+ memset (&nladdr, '\0', sizeof (nladdr));
-+ nladdr.nl_family = AF_NETLINK;
-+
-+ if (TEMP_FAILURE_RETRY (__sendto (fd, (void *) &req, sizeof (req), 0,
-+ (struct sockaddr *) &nladdr,
-+ sizeof (nladdr))) < 0)
-+ return -1;
-+
-+ *seen_ipv4 = false;
-+ *seen_ipv6 = false;
-+
-+ bool done = false;
-+ char buf[4096];
-+ struct iovec iov = { buf, sizeof (buf) };
-+ struct in6ailist
-+ {
-+ struct in6addrinfo info;
-+ struct in6ailist *next;
-+ } *in6ailist = NULL;
-+ size_t in6ailistlen = 0;
-+
-+ do
-+ {
-+ struct msghdr msg =
-+ {
-+ (void *) &nladdr, sizeof (nladdr),
-+ &iov, 1,
-+ NULL, 0,
-+ 0
-+ };
-+
-+ ssize_t read_len = TEMP_FAILURE_RETRY (__recvmsg (fd, &msg, 0));
-+ if (read_len < 0)
-+ return -1;
-+
-+ if (msg.msg_flags & MSG_TRUNC)
-+ return -1;
-+
-+ struct nlmsghdr *nlmh;
-+ for (nlmh = (struct nlmsghdr *) buf;
-+ NLMSG_OK (nlmh, (size_t) read_len);
-+ nlmh = (struct nlmsghdr *) NLMSG_NEXT (nlmh, read_len))
-+ {
-+ if (nladdr.nl_pid != 0 || (pid_t) nlmh->nlmsg_pid != pid
-+ || nlmh->nlmsg_seq != req.nlh.nlmsg_seq)
-+ continue;
-+
-+ if (nlmh->nlmsg_type == RTM_NEWADDR)
-+ {
-+ struct ifaddrmsg *ifam = (struct ifaddrmsg *) NLMSG_DATA (nlmh);
-+
-+ switch (ifam->ifa_family)
-+ {
-+ case AF_INET:
-+ *seen_ipv4 = true;
-+ break;
-+ case AF_INET6:
-+ *seen_ipv6 = true;
-+
-+ if (ifam->ifa_flags & (IFA_F_DEPRECATED
-+ | IFA_F_TEMPORARY
-+ | IFA_F_HOMEADDRESS))
-+ {
-+ struct rtattr *rta = IFA_RTA (ifam);
-+ size_t len = (nlmh->nlmsg_len
-+ - NLMSG_LENGTH (sizeof (*ifam)));
-+ void *local = NULL;
-+ void *address = NULL;
-+ while (RTA_OK (rta, len))
-+ {
-+ switch (rta->rta_type)
-+ {
-+ case IFA_LOCAL:
-+ local = RTA_DATA (rta);
-+ break;
-+
-+ case IFA_ADDRESS:
-+ address = RTA_DATA (rta);
-+ break;
-+ }
-+
-+ rta = RTA_NEXT (rta, len);
-+ }
-+
-+ struct in6ailist *newp = alloca (sizeof (*newp));
-+ newp->info.flags = (((ifam->ifa_flags & IFA_F_DEPRECATED)
-+ ? in6ai_deprecated : 0)
-+ | ((ifam->ifa_flags
-+ & IFA_F_TEMPORARY)
-+ ? in6ai_temporary : 0)
-+ | ((ifam->ifa_flags
-+ & IFA_F_HOMEADDRESS)
-+ ? in6ai_homeaddress : 0));
-+ memcpy (newp->info.addr, address ?: local,
-+ sizeof (newp->info.addr));
-+ newp->next = in6ailist;
-+ in6ailist = newp;
-+ ++in6ailistlen;
-+ }
-+ break;
-+ default:
-+ /* Ignore. */
-+ break;
-+ }
-+ }
-+ else if (nlmh->nlmsg_type == NLMSG_DONE)
-+ /* We found the end, leave the loop. */
-+ done = true;
-+ }
-+ }
-+ while (! done);
-+
-+ close_not_cancel_no_status (fd);
-+
-+ if (in6ailist != NULL)
-+ {
-+ *in6ai = malloc (in6ailistlen * sizeof (**in6ai));
-+ if (*in6ai == NULL)
-+ return -1;
-+
-+ *in6ailen = in6ailistlen;
-+
-+ do
-+ {
-+ (*in6ai)[--in6ailistlen] = in6ailist->info;
-+ in6ailist = in6ailist->next;
-+ }
-+ while (in6ailist != NULL);
-+ }
-+
-+ return 0;
-+}
-+
-+
-+/* We don't know if we have NETLINK support compiled in in our
-+ Kernel. */
-+#if __ASSUME_NETLINK_SUPPORT == 0
-+/* Define in ifaddrs.h. */
-+extern int __no_netlink_support attribute_hidden;
-+#else
-+# define __no_netlink_support 0
-+#endif
-+
-+
-+void
-+attribute_hidden
-+__check_pf (bool *seen_ipv4, bool *seen_ipv6,
-+ struct in6addrinfo **in6ai, size_t *in6ailen)
-+{
-+ *in6ai = NULL;
-+ *in6ailen = 0;
-+
-+ if (! __no_netlink_support)
-+ {
-+ int fd = __socket (PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
-+
-+ struct sockaddr_nl nladdr;
-+ memset (&nladdr, '\0', sizeof (nladdr));
-+ nladdr.nl_family = AF_NETLINK;
-+
-+ socklen_t addr_len = sizeof (nladdr);
-+
-+ if (fd >= 0
-+ && __bind (fd, (struct sockaddr *) &nladdr, sizeof (nladdr)) == 0
-+ && __getsockname (fd, (struct sockaddr *) &nladdr, &addr_len) == 0
-+ && make_request (fd, nladdr.nl_pid, seen_ipv4, seen_ipv6,
-+ in6ai, in6ailen) == 0)
-+ /* It worked. */
-+ return;
-+
-+ if (fd >= 0)
-+ __close (fd);
-+
-+#if __ASSUME_NETLINK_SUPPORT == 0
-+ /* Remember that there is no netlink support. */
-+ __no_netlink_support = 1;
-+#else
-+ /* We cannot determine what interfaces are available. Be
-+ pessimistic. */
-+ *seen_ipv4 = true;
-+ *seen_ipv6 = true;
-+#endif
-+ }
-+
-+#if __ASSUME_NETLINK_SUPPORT == 0
-+ /* No netlink. Get the interface list via getifaddrs. */
-+ struct ifaddrs *ifa = NULL;
-+ if (getifaddrs (&ifa) != 0)
-+ {
-+ /* We cannot determine what interfaces are available. Be
-+ pessimistic. */
-+ *seen_ipv4 = true;
-+ *seen_ipv6 = true;
-+ return;
-+ }
-+
-+ struct ifaddrs *runp;
-+ for (runp = ifa; runp != NULL; runp = runp->ifa_next)
-+ if (runp->ifa_addr->sa_family == PF_INET)
-+ *seen_ipv4 = true;
-+ else if (runp->ifa_addr->sa_family == PF_INET6)
-+ *seen_ipv6 = true;
-+
-+ (void) freeifaddrs (ifa);
-+#endif
-+}
-Index: sysdeps/unix/sysv/linux/arm/eabi/check_pf.c
-===================================================================
-RCS file: sysdeps/unix/sysv/linux/arm/eabi/check_pf.c
-diff -N sysdeps/unix/sysv/linux/arm/eabi/check_pf.c
---- /dev/null 1 Jan 1970 00:00:00 -0000
-+++ sysdeps/unix/sysv/linux/arm/eabi/check_pf.c 31 Oct 2006 17:29:58 -0000
-@@ -0,0 +1 @@
-+#include <sysdeps/unix/sysv/linux/check_pf.c>
-
