![David Engel](/assets/img/avatar_default.png)
Fix setting of the broadcast address when the netmask is set via SIOCSIFNETMASK in Linux 2.6. The code wanted the old value of ifa->ifa_mask but used it after it had already been overwritten with the new value. Signed-off-by: David Engel <gigem@comcast.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
1533 lines
36 KiB
C
1533 lines
36 KiB
C
/*
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* NET3 IP device support routines.
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*
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* Version: $Id: devinet.c,v 1.44 2001/10/31 21:55:54 davem Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Derived from the IP parts of dev.c 1.0.19
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* Authors: Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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*
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* Additional Authors:
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* Changes:
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* Alexey Kuznetsov: pa_* fields are replaced with ifaddr
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* lists.
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* Cyrus Durgin: updated for kmod
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* Matthias Andree: in devinet_ioctl, compare label and
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* address (4.4BSD alias style support),
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* fall back to comparing just the label
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* if no match found.
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*/
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#include <linux/config.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <linux/bitops.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/in.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/if_ether.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <linux/init.h>
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#include <linux/notifier.h>
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#include <linux/inetdevice.h>
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#include <linux/igmp.h>
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#ifdef CONFIG_SYSCTL
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#include <linux/sysctl.h>
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#endif
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#include <linux/kmod.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/ip_fib.h>
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struct ipv4_devconf ipv4_devconf = {
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.accept_redirects = 1,
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.send_redirects = 1,
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.secure_redirects = 1,
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.shared_media = 1,
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};
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static struct ipv4_devconf ipv4_devconf_dflt = {
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.accept_redirects = 1,
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.send_redirects = 1,
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.secure_redirects = 1,
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.shared_media = 1,
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.accept_source_route = 1,
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};
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static void rtmsg_ifa(int event, struct in_ifaddr *);
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static struct notifier_block *inetaddr_chain;
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static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
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int destroy);
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#ifdef CONFIG_SYSCTL
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static void devinet_sysctl_register(struct in_device *in_dev,
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struct ipv4_devconf *p);
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static void devinet_sysctl_unregister(struct ipv4_devconf *p);
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#endif
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/* Locks all the inet devices. */
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static struct in_ifaddr *inet_alloc_ifa(void)
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{
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struct in_ifaddr *ifa = kmalloc(sizeof(*ifa), GFP_KERNEL);
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if (ifa) {
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memset(ifa, 0, sizeof(*ifa));
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INIT_RCU_HEAD(&ifa->rcu_head);
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}
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return ifa;
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}
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static void inet_rcu_free_ifa(struct rcu_head *head)
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{
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struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head);
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if (ifa->ifa_dev)
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in_dev_put(ifa->ifa_dev);
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kfree(ifa);
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}
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static inline void inet_free_ifa(struct in_ifaddr *ifa)
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{
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call_rcu(&ifa->rcu_head, inet_rcu_free_ifa);
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}
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void in_dev_finish_destroy(struct in_device *idev)
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{
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struct net_device *dev = idev->dev;
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BUG_TRAP(!idev->ifa_list);
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BUG_TRAP(!idev->mc_list);
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#ifdef NET_REFCNT_DEBUG
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printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n",
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idev, dev ? dev->name : "NIL");
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#endif
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dev_put(dev);
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if (!idev->dead)
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printk("Freeing alive in_device %p\n", idev);
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else {
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kfree(idev);
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}
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}
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struct in_device *inetdev_init(struct net_device *dev)
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{
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struct in_device *in_dev;
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ASSERT_RTNL();
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in_dev = kmalloc(sizeof(*in_dev), GFP_KERNEL);
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if (!in_dev)
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goto out;
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memset(in_dev, 0, sizeof(*in_dev));
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INIT_RCU_HEAD(&in_dev->rcu_head);
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memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf));
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in_dev->cnf.sysctl = NULL;
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in_dev->dev = dev;
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if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL)
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goto out_kfree;
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/* Reference in_dev->dev */
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dev_hold(dev);
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#ifdef CONFIG_SYSCTL
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neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
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NET_IPV4_NEIGH, "ipv4", NULL, NULL);
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#endif
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/* Account for reference dev->ip_ptr */
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in_dev_hold(in_dev);
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rcu_assign_pointer(dev->ip_ptr, in_dev);
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#ifdef CONFIG_SYSCTL
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devinet_sysctl_register(in_dev, &in_dev->cnf);
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#endif
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ip_mc_init_dev(in_dev);
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if (dev->flags & IFF_UP)
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ip_mc_up(in_dev);
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out:
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return in_dev;
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out_kfree:
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kfree(in_dev);
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in_dev = NULL;
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goto out;
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}
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static void in_dev_rcu_put(struct rcu_head *head)
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{
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struct in_device *idev = container_of(head, struct in_device, rcu_head);
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in_dev_put(idev);
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}
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static void inetdev_destroy(struct in_device *in_dev)
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{
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struct in_ifaddr *ifa;
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struct net_device *dev;
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ASSERT_RTNL();
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dev = in_dev->dev;
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if (dev == &loopback_dev)
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return;
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in_dev->dead = 1;
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ip_mc_destroy_dev(in_dev);
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while ((ifa = in_dev->ifa_list) != NULL) {
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inet_del_ifa(in_dev, &in_dev->ifa_list, 0);
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inet_free_ifa(ifa);
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}
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#ifdef CONFIG_SYSCTL
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devinet_sysctl_unregister(&in_dev->cnf);
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#endif
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dev->ip_ptr = NULL;
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#ifdef CONFIG_SYSCTL
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neigh_sysctl_unregister(in_dev->arp_parms);
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#endif
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neigh_parms_release(&arp_tbl, in_dev->arp_parms);
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arp_ifdown(dev);
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call_rcu(&in_dev->rcu_head, in_dev_rcu_put);
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}
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int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b)
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{
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rcu_read_lock();
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for_primary_ifa(in_dev) {
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if (inet_ifa_match(a, ifa)) {
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if (!b || inet_ifa_match(b, ifa)) {
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rcu_read_unlock();
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return 1;
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}
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}
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} endfor_ifa(in_dev);
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rcu_read_unlock();
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return 0;
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}
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static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
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int destroy)
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{
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struct in_ifaddr *promote = NULL;
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struct in_ifaddr *ifa1 = *ifap;
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ASSERT_RTNL();
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/* 1. Deleting primary ifaddr forces deletion all secondaries
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* unless alias promotion is set
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**/
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if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) {
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struct in_ifaddr *ifa;
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struct in_ifaddr **ifap1 = &ifa1->ifa_next;
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while ((ifa = *ifap1) != NULL) {
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if (!(ifa->ifa_flags & IFA_F_SECONDARY) ||
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ifa1->ifa_mask != ifa->ifa_mask ||
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!inet_ifa_match(ifa1->ifa_address, ifa)) {
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ifap1 = &ifa->ifa_next;
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continue;
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}
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if (!IN_DEV_PROMOTE_SECONDARIES(in_dev)) {
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*ifap1 = ifa->ifa_next;
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rtmsg_ifa(RTM_DELADDR, ifa);
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notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa);
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inet_free_ifa(ifa);
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} else {
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promote = ifa;
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break;
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}
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}
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}
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/* 2. Unlink it */
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*ifap = ifa1->ifa_next;
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/* 3. Announce address deletion */
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/* Send message first, then call notifier.
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At first sight, FIB update triggered by notifier
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will refer to already deleted ifaddr, that could confuse
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netlink listeners. It is not true: look, gated sees
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that route deleted and if it still thinks that ifaddr
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is valid, it will try to restore deleted routes... Grr.
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So that, this order is correct.
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*/
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rtmsg_ifa(RTM_DELADDR, ifa1);
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notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1);
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if (destroy) {
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inet_free_ifa(ifa1);
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if (!in_dev->ifa_list)
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inetdev_destroy(in_dev);
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}
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if (promote && IN_DEV_PROMOTE_SECONDARIES(in_dev)) {
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/* not sure if we should send a delete notify first? */
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promote->ifa_flags &= ~IFA_F_SECONDARY;
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rtmsg_ifa(RTM_NEWADDR, promote);
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notifier_call_chain(&inetaddr_chain, NETDEV_UP, promote);
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}
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}
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static int inet_insert_ifa(struct in_ifaddr *ifa)
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{
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struct in_device *in_dev = ifa->ifa_dev;
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struct in_ifaddr *ifa1, **ifap, **last_primary;
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ASSERT_RTNL();
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if (!ifa->ifa_local) {
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inet_free_ifa(ifa);
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return 0;
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}
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ifa->ifa_flags &= ~IFA_F_SECONDARY;
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last_primary = &in_dev->ifa_list;
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for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL;
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ifap = &ifa1->ifa_next) {
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if (!(ifa1->ifa_flags & IFA_F_SECONDARY) &&
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ifa->ifa_scope <= ifa1->ifa_scope)
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last_primary = &ifa1->ifa_next;
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if (ifa1->ifa_mask == ifa->ifa_mask &&
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inet_ifa_match(ifa1->ifa_address, ifa)) {
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if (ifa1->ifa_local == ifa->ifa_local) {
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inet_free_ifa(ifa);
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return -EEXIST;
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}
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if (ifa1->ifa_scope != ifa->ifa_scope) {
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inet_free_ifa(ifa);
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return -EINVAL;
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}
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ifa->ifa_flags |= IFA_F_SECONDARY;
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}
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}
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if (!(ifa->ifa_flags & IFA_F_SECONDARY)) {
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net_srandom(ifa->ifa_local);
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ifap = last_primary;
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}
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ifa->ifa_next = *ifap;
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*ifap = ifa;
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/* Send message first, then call notifier.
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Notifier will trigger FIB update, so that
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listeners of netlink will know about new ifaddr */
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rtmsg_ifa(RTM_NEWADDR, ifa);
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notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa);
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return 0;
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}
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static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa)
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{
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struct in_device *in_dev = __in_dev_get_rtnl(dev);
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ASSERT_RTNL();
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if (!in_dev) {
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in_dev = inetdev_init(dev);
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if (!in_dev) {
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inet_free_ifa(ifa);
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return -ENOBUFS;
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}
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}
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if (ifa->ifa_dev != in_dev) {
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BUG_TRAP(!ifa->ifa_dev);
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in_dev_hold(in_dev);
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ifa->ifa_dev = in_dev;
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}
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if (LOOPBACK(ifa->ifa_local))
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ifa->ifa_scope = RT_SCOPE_HOST;
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return inet_insert_ifa(ifa);
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}
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struct in_device *inetdev_by_index(int ifindex)
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{
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struct net_device *dev;
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struct in_device *in_dev = NULL;
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read_lock(&dev_base_lock);
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dev = __dev_get_by_index(ifindex);
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if (dev)
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in_dev = in_dev_get(dev);
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read_unlock(&dev_base_lock);
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return in_dev;
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}
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/* Called only from RTNL semaphored context. No locks. */
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struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix,
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u32 mask)
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{
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ASSERT_RTNL();
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for_primary_ifa(in_dev) {
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if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa))
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return ifa;
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} endfor_ifa(in_dev);
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return NULL;
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}
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static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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{
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struct rtattr **rta = arg;
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struct in_device *in_dev;
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struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
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struct in_ifaddr *ifa, **ifap;
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ASSERT_RTNL();
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if ((in_dev = inetdev_by_index(ifm->ifa_index)) == NULL)
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goto out;
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__in_dev_put(in_dev);
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for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
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ifap = &ifa->ifa_next) {
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if ((rta[IFA_LOCAL - 1] &&
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memcmp(RTA_DATA(rta[IFA_LOCAL - 1]),
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&ifa->ifa_local, 4)) ||
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(rta[IFA_LABEL - 1] &&
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rtattr_strcmp(rta[IFA_LABEL - 1], ifa->ifa_label)) ||
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(rta[IFA_ADDRESS - 1] &&
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(ifm->ifa_prefixlen != ifa->ifa_prefixlen ||
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!inet_ifa_match(*(u32*)RTA_DATA(rta[IFA_ADDRESS - 1]),
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ifa))))
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continue;
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inet_del_ifa(in_dev, ifap, 1);
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return 0;
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}
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out:
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return -EADDRNOTAVAIL;
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}
|
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|
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static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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{
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struct rtattr **rta = arg;
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struct net_device *dev;
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struct in_device *in_dev;
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struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
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struct in_ifaddr *ifa;
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int rc = -EINVAL;
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|
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ASSERT_RTNL();
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|
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if (ifm->ifa_prefixlen > 32 || !rta[IFA_LOCAL - 1])
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goto out;
|
|
|
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rc = -ENODEV;
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if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
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goto out;
|
|
|
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rc = -ENOBUFS;
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if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) {
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in_dev = inetdev_init(dev);
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if (!in_dev)
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goto out;
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}
|
|
|
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if ((ifa = inet_alloc_ifa()) == NULL)
|
|
goto out;
|
|
|
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if (!rta[IFA_ADDRESS - 1])
|
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rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
|
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memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL - 1]), 4);
|
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memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS - 1]), 4);
|
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ifa->ifa_prefixlen = ifm->ifa_prefixlen;
|
|
ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen);
|
|
if (rta[IFA_BROADCAST - 1])
|
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memcpy(&ifa->ifa_broadcast,
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RTA_DATA(rta[IFA_BROADCAST - 1]), 4);
|
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if (rta[IFA_ANYCAST - 1])
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memcpy(&ifa->ifa_anycast, RTA_DATA(rta[IFA_ANYCAST - 1]), 4);
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ifa->ifa_flags = ifm->ifa_flags;
|
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ifa->ifa_scope = ifm->ifa_scope;
|
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in_dev_hold(in_dev);
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ifa->ifa_dev = in_dev;
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if (rta[IFA_LABEL - 1])
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rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL - 1], IFNAMSIZ);
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else
|
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memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
|
|
|
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rc = inet_insert_ifa(ifa);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Determine a default network mask, based on the IP address.
|
|
*/
|
|
|
|
static __inline__ int inet_abc_len(u32 addr)
|
|
{
|
|
int rc = -1; /* Something else, probably a multicast. */
|
|
|
|
if (ZERONET(addr))
|
|
rc = 0;
|
|
else {
|
|
addr = ntohl(addr);
|
|
|
|
if (IN_CLASSA(addr))
|
|
rc = 8;
|
|
else if (IN_CLASSB(addr))
|
|
rc = 16;
|
|
else if (IN_CLASSC(addr))
|
|
rc = 24;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
int devinet_ioctl(unsigned int cmd, void __user *arg)
|
|
{
|
|
struct ifreq ifr;
|
|
struct sockaddr_in sin_orig;
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
|
|
struct in_device *in_dev;
|
|
struct in_ifaddr **ifap = NULL;
|
|
struct in_ifaddr *ifa = NULL;
|
|
struct net_device *dev;
|
|
char *colon;
|
|
int ret = -EFAULT;
|
|
int tryaddrmatch = 0;
|
|
|
|
/*
|
|
* Fetch the caller's info block into kernel space
|
|
*/
|
|
|
|
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
|
|
goto out;
|
|
ifr.ifr_name[IFNAMSIZ - 1] = 0;
|
|
|
|
/* save original address for comparison */
|
|
memcpy(&sin_orig, sin, sizeof(*sin));
|
|
|
|
colon = strchr(ifr.ifr_name, ':');
|
|
if (colon)
|
|
*colon = 0;
|
|
|
|
#ifdef CONFIG_KMOD
|
|
dev_load(ifr.ifr_name);
|
|
#endif
|
|
|
|
switch(cmd) {
|
|
case SIOCGIFADDR: /* Get interface address */
|
|
case SIOCGIFBRDADDR: /* Get the broadcast address */
|
|
case SIOCGIFDSTADDR: /* Get the destination address */
|
|
case SIOCGIFNETMASK: /* Get the netmask for the interface */
|
|
/* Note that these ioctls will not sleep,
|
|
so that we do not impose a lock.
|
|
One day we will be forced to put shlock here (I mean SMP)
|
|
*/
|
|
tryaddrmatch = (sin_orig.sin_family == AF_INET);
|
|
memset(sin, 0, sizeof(*sin));
|
|
sin->sin_family = AF_INET;
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
ret = -EACCES;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
goto out;
|
|
break;
|
|
case SIOCSIFADDR: /* Set interface address (and family) */
|
|
case SIOCSIFBRDADDR: /* Set the broadcast address */
|
|
case SIOCSIFDSTADDR: /* Set the destination address */
|
|
case SIOCSIFNETMASK: /* Set the netmask for the interface */
|
|
ret = -EACCES;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
goto out;
|
|
ret = -EINVAL;
|
|
if (sin->sin_family != AF_INET)
|
|
goto out;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
rtnl_lock();
|
|
|
|
ret = -ENODEV;
|
|
if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL)
|
|
goto done;
|
|
|
|
if (colon)
|
|
*colon = ':';
|
|
|
|
if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) {
|
|
if (tryaddrmatch) {
|
|
/* Matthias Andree */
|
|
/* compare label and address (4.4BSD style) */
|
|
/* note: we only do this for a limited set of ioctls
|
|
and only if the original address family was AF_INET.
|
|
This is checked above. */
|
|
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
|
|
ifap = &ifa->ifa_next) {
|
|
if (!strcmp(ifr.ifr_name, ifa->ifa_label) &&
|
|
sin_orig.sin_addr.s_addr ==
|
|
ifa->ifa_address) {
|
|
break; /* found */
|
|
}
|
|
}
|
|
}
|
|
/* we didn't get a match, maybe the application is
|
|
4.3BSD-style and passed in junk so we fall back to
|
|
comparing just the label */
|
|
if (!ifa) {
|
|
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
|
|
ifap = &ifa->ifa_next)
|
|
if (!strcmp(ifr.ifr_name, ifa->ifa_label))
|
|
break;
|
|
}
|
|
}
|
|
|
|
ret = -EADDRNOTAVAIL;
|
|
if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS)
|
|
goto done;
|
|
|
|
switch(cmd) {
|
|
case SIOCGIFADDR: /* Get interface address */
|
|
sin->sin_addr.s_addr = ifa->ifa_local;
|
|
goto rarok;
|
|
|
|
case SIOCGIFBRDADDR: /* Get the broadcast address */
|
|
sin->sin_addr.s_addr = ifa->ifa_broadcast;
|
|
goto rarok;
|
|
|
|
case SIOCGIFDSTADDR: /* Get the destination address */
|
|
sin->sin_addr.s_addr = ifa->ifa_address;
|
|
goto rarok;
|
|
|
|
case SIOCGIFNETMASK: /* Get the netmask for the interface */
|
|
sin->sin_addr.s_addr = ifa->ifa_mask;
|
|
goto rarok;
|
|
|
|
case SIOCSIFFLAGS:
|
|
if (colon) {
|
|
ret = -EADDRNOTAVAIL;
|
|
if (!ifa)
|
|
break;
|
|
ret = 0;
|
|
if (!(ifr.ifr_flags & IFF_UP))
|
|
inet_del_ifa(in_dev, ifap, 1);
|
|
break;
|
|
}
|
|
ret = dev_change_flags(dev, ifr.ifr_flags);
|
|
break;
|
|
|
|
case SIOCSIFADDR: /* Set interface address (and family) */
|
|
ret = -EINVAL;
|
|
if (inet_abc_len(sin->sin_addr.s_addr) < 0)
|
|
break;
|
|
|
|
if (!ifa) {
|
|
ret = -ENOBUFS;
|
|
if ((ifa = inet_alloc_ifa()) == NULL)
|
|
break;
|
|
if (colon)
|
|
memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
|
|
else
|
|
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
|
|
} else {
|
|
ret = 0;
|
|
if (ifa->ifa_local == sin->sin_addr.s_addr)
|
|
break;
|
|
inet_del_ifa(in_dev, ifap, 0);
|
|
ifa->ifa_broadcast = 0;
|
|
ifa->ifa_anycast = 0;
|
|
}
|
|
|
|
ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr;
|
|
|
|
if (!(dev->flags & IFF_POINTOPOINT)) {
|
|
ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address);
|
|
ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen);
|
|
if ((dev->flags & IFF_BROADCAST) &&
|
|
ifa->ifa_prefixlen < 31)
|
|
ifa->ifa_broadcast = ifa->ifa_address |
|
|
~ifa->ifa_mask;
|
|
} else {
|
|
ifa->ifa_prefixlen = 32;
|
|
ifa->ifa_mask = inet_make_mask(32);
|
|
}
|
|
ret = inet_set_ifa(dev, ifa);
|
|
break;
|
|
|
|
case SIOCSIFBRDADDR: /* Set the broadcast address */
|
|
ret = 0;
|
|
if (ifa->ifa_broadcast != sin->sin_addr.s_addr) {
|
|
inet_del_ifa(in_dev, ifap, 0);
|
|
ifa->ifa_broadcast = sin->sin_addr.s_addr;
|
|
inet_insert_ifa(ifa);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFDSTADDR: /* Set the destination address */
|
|
ret = 0;
|
|
if (ifa->ifa_address == sin->sin_addr.s_addr)
|
|
break;
|
|
ret = -EINVAL;
|
|
if (inet_abc_len(sin->sin_addr.s_addr) < 0)
|
|
break;
|
|
ret = 0;
|
|
inet_del_ifa(in_dev, ifap, 0);
|
|
ifa->ifa_address = sin->sin_addr.s_addr;
|
|
inet_insert_ifa(ifa);
|
|
break;
|
|
|
|
case SIOCSIFNETMASK: /* Set the netmask for the interface */
|
|
|
|
/*
|
|
* The mask we set must be legal.
|
|
*/
|
|
ret = -EINVAL;
|
|
if (bad_mask(sin->sin_addr.s_addr, 0))
|
|
break;
|
|
ret = 0;
|
|
if (ifa->ifa_mask != sin->sin_addr.s_addr) {
|
|
u32 old_mask = ifa->ifa_mask;
|
|
inet_del_ifa(in_dev, ifap, 0);
|
|
ifa->ifa_mask = sin->sin_addr.s_addr;
|
|
ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask);
|
|
|
|
/* See if current broadcast address matches
|
|
* with current netmask, then recalculate
|
|
* the broadcast address. Otherwise it's a
|
|
* funny address, so don't touch it since
|
|
* the user seems to know what (s)he's doing...
|
|
*/
|
|
if ((dev->flags & IFF_BROADCAST) &&
|
|
(ifa->ifa_prefixlen < 31) &&
|
|
(ifa->ifa_broadcast ==
|
|
(ifa->ifa_local|~old_mask))) {
|
|
ifa->ifa_broadcast = (ifa->ifa_local |
|
|
~sin->sin_addr.s_addr);
|
|
}
|
|
inet_insert_ifa(ifa);
|
|
}
|
|
break;
|
|
}
|
|
done:
|
|
rtnl_unlock();
|
|
out:
|
|
return ret;
|
|
rarok:
|
|
rtnl_unlock();
|
|
ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0;
|
|
goto out;
|
|
}
|
|
|
|
static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
|
|
{
|
|
struct in_device *in_dev = __in_dev_get_rtnl(dev);
|
|
struct in_ifaddr *ifa;
|
|
struct ifreq ifr;
|
|
int done = 0;
|
|
|
|
if (!in_dev || (ifa = in_dev->ifa_list) == NULL)
|
|
goto out;
|
|
|
|
for (; ifa; ifa = ifa->ifa_next) {
|
|
if (!buf) {
|
|
done += sizeof(ifr);
|
|
continue;
|
|
}
|
|
if (len < (int) sizeof(ifr))
|
|
break;
|
|
memset(&ifr, 0, sizeof(struct ifreq));
|
|
if (ifa->ifa_label)
|
|
strcpy(ifr.ifr_name, ifa->ifa_label);
|
|
else
|
|
strcpy(ifr.ifr_name, dev->name);
|
|
|
|
(*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET;
|
|
(*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr =
|
|
ifa->ifa_local;
|
|
|
|
if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) {
|
|
done = -EFAULT;
|
|
break;
|
|
}
|
|
buf += sizeof(struct ifreq);
|
|
len -= sizeof(struct ifreq);
|
|
done += sizeof(struct ifreq);
|
|
}
|
|
out:
|
|
return done;
|
|
}
|
|
|
|
u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope)
|
|
{
|
|
u32 addr = 0;
|
|
struct in_device *in_dev;
|
|
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(dev);
|
|
if (!in_dev)
|
|
goto no_in_dev;
|
|
|
|
for_primary_ifa(in_dev) {
|
|
if (ifa->ifa_scope > scope)
|
|
continue;
|
|
if (!dst || inet_ifa_match(dst, ifa)) {
|
|
addr = ifa->ifa_local;
|
|
break;
|
|
}
|
|
if (!addr)
|
|
addr = ifa->ifa_local;
|
|
} endfor_ifa(in_dev);
|
|
no_in_dev:
|
|
rcu_read_unlock();
|
|
|
|
if (addr)
|
|
goto out;
|
|
|
|
/* Not loopback addresses on loopback should be preferred
|
|
in this case. It is importnat that lo is the first interface
|
|
in dev_base list.
|
|
*/
|
|
read_lock(&dev_base_lock);
|
|
rcu_read_lock();
|
|
for (dev = dev_base; dev; dev = dev->next) {
|
|
if ((in_dev = __in_dev_get_rcu(dev)) == NULL)
|
|
continue;
|
|
|
|
for_primary_ifa(in_dev) {
|
|
if (ifa->ifa_scope != RT_SCOPE_LINK &&
|
|
ifa->ifa_scope <= scope) {
|
|
addr = ifa->ifa_local;
|
|
goto out_unlock_both;
|
|
}
|
|
} endfor_ifa(in_dev);
|
|
}
|
|
out_unlock_both:
|
|
read_unlock(&dev_base_lock);
|
|
rcu_read_unlock();
|
|
out:
|
|
return addr;
|
|
}
|
|
|
|
static u32 confirm_addr_indev(struct in_device *in_dev, u32 dst,
|
|
u32 local, int scope)
|
|
{
|
|
int same = 0;
|
|
u32 addr = 0;
|
|
|
|
for_ifa(in_dev) {
|
|
if (!addr &&
|
|
(local == ifa->ifa_local || !local) &&
|
|
ifa->ifa_scope <= scope) {
|
|
addr = ifa->ifa_local;
|
|
if (same)
|
|
break;
|
|
}
|
|
if (!same) {
|
|
same = (!local || inet_ifa_match(local, ifa)) &&
|
|
(!dst || inet_ifa_match(dst, ifa));
|
|
if (same && addr) {
|
|
if (local || !dst)
|
|
break;
|
|
/* Is the selected addr into dst subnet? */
|
|
if (inet_ifa_match(addr, ifa))
|
|
break;
|
|
/* No, then can we use new local src? */
|
|
if (ifa->ifa_scope <= scope) {
|
|
addr = ifa->ifa_local;
|
|
break;
|
|
}
|
|
/* search for large dst subnet for addr */
|
|
same = 0;
|
|
}
|
|
}
|
|
} endfor_ifa(in_dev);
|
|
|
|
return same? addr : 0;
|
|
}
|
|
|
|
/*
|
|
* Confirm that local IP address exists using wildcards:
|
|
* - dev: only on this interface, 0=any interface
|
|
* - dst: only in the same subnet as dst, 0=any dst
|
|
* - local: address, 0=autoselect the local address
|
|
* - scope: maximum allowed scope value for the local address
|
|
*/
|
|
u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope)
|
|
{
|
|
u32 addr = 0;
|
|
struct in_device *in_dev;
|
|
|
|
if (dev) {
|
|
rcu_read_lock();
|
|
if ((in_dev = __in_dev_get_rcu(dev)))
|
|
addr = confirm_addr_indev(in_dev, dst, local, scope);
|
|
rcu_read_unlock();
|
|
|
|
return addr;
|
|
}
|
|
|
|
read_lock(&dev_base_lock);
|
|
rcu_read_lock();
|
|
for (dev = dev_base; dev; dev = dev->next) {
|
|
if ((in_dev = __in_dev_get_rcu(dev))) {
|
|
addr = confirm_addr_indev(in_dev, dst, local, scope);
|
|
if (addr)
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
read_unlock(&dev_base_lock);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Device notifier
|
|
*/
|
|
|
|
int register_inetaddr_notifier(struct notifier_block *nb)
|
|
{
|
|
return notifier_chain_register(&inetaddr_chain, nb);
|
|
}
|
|
|
|
int unregister_inetaddr_notifier(struct notifier_block *nb)
|
|
{
|
|
return notifier_chain_unregister(&inetaddr_chain, nb);
|
|
}
|
|
|
|
/* Rename ifa_labels for a device name change. Make some effort to preserve existing
|
|
* alias numbering and to create unique labels if possible.
|
|
*/
|
|
static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
|
|
{
|
|
struct in_ifaddr *ifa;
|
|
int named = 0;
|
|
|
|
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
|
|
char old[IFNAMSIZ], *dot;
|
|
|
|
memcpy(old, ifa->ifa_label, IFNAMSIZ);
|
|
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
|
|
if (named++ == 0)
|
|
continue;
|
|
dot = strchr(ifa->ifa_label, ':');
|
|
if (dot == NULL) {
|
|
sprintf(old, ":%d", named);
|
|
dot = old;
|
|
}
|
|
if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) {
|
|
strcat(ifa->ifa_label, dot);
|
|
} else {
|
|
strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Called only under RTNL semaphore */
|
|
|
|
static int inetdev_event(struct notifier_block *this, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct net_device *dev = ptr;
|
|
struct in_device *in_dev = __in_dev_get_rtnl(dev);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (!in_dev) {
|
|
if (event == NETDEV_REGISTER && dev == &loopback_dev) {
|
|
in_dev = inetdev_init(dev);
|
|
if (!in_dev)
|
|
panic("devinet: Failed to create loopback\n");
|
|
in_dev->cnf.no_xfrm = 1;
|
|
in_dev->cnf.no_policy = 1;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
switch (event) {
|
|
case NETDEV_REGISTER:
|
|
printk(KERN_DEBUG "inetdev_event: bug\n");
|
|
dev->ip_ptr = NULL;
|
|
break;
|
|
case NETDEV_UP:
|
|
if (dev->mtu < 68)
|
|
break;
|
|
if (dev == &loopback_dev) {
|
|
struct in_ifaddr *ifa;
|
|
if ((ifa = inet_alloc_ifa()) != NULL) {
|
|
ifa->ifa_local =
|
|
ifa->ifa_address = htonl(INADDR_LOOPBACK);
|
|
ifa->ifa_prefixlen = 8;
|
|
ifa->ifa_mask = inet_make_mask(8);
|
|
in_dev_hold(in_dev);
|
|
ifa->ifa_dev = in_dev;
|
|
ifa->ifa_scope = RT_SCOPE_HOST;
|
|
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
|
|
inet_insert_ifa(ifa);
|
|
}
|
|
}
|
|
ip_mc_up(in_dev);
|
|
break;
|
|
case NETDEV_DOWN:
|
|
ip_mc_down(in_dev);
|
|
break;
|
|
case NETDEV_CHANGEMTU:
|
|
if (dev->mtu >= 68)
|
|
break;
|
|
/* MTU falled under 68, disable IP */
|
|
case NETDEV_UNREGISTER:
|
|
inetdev_destroy(in_dev);
|
|
break;
|
|
case NETDEV_CHANGENAME:
|
|
/* Do not notify about label change, this event is
|
|
* not interesting to applications using netlink.
|
|
*/
|
|
inetdev_changename(dev, in_dev);
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
devinet_sysctl_unregister(&in_dev->cnf);
|
|
neigh_sysctl_unregister(in_dev->arp_parms);
|
|
neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
|
|
NET_IPV4_NEIGH, "ipv4", NULL, NULL);
|
|
devinet_sysctl_register(in_dev, &in_dev->cnf);
|
|
#endif
|
|
break;
|
|
}
|
|
out:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block ip_netdev_notifier = {
|
|
.notifier_call =inetdev_event,
|
|
};
|
|
|
|
static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa,
|
|
u32 pid, u32 seq, int event, unsigned int flags)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
struct nlmsghdr *nlh;
|
|
unsigned char *b = skb->tail;
|
|
|
|
nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
|
|
ifm = NLMSG_DATA(nlh);
|
|
ifm->ifa_family = AF_INET;
|
|
ifm->ifa_prefixlen = ifa->ifa_prefixlen;
|
|
ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT;
|
|
ifm->ifa_scope = ifa->ifa_scope;
|
|
ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
|
|
if (ifa->ifa_address)
|
|
RTA_PUT(skb, IFA_ADDRESS, 4, &ifa->ifa_address);
|
|
if (ifa->ifa_local)
|
|
RTA_PUT(skb, IFA_LOCAL, 4, &ifa->ifa_local);
|
|
if (ifa->ifa_broadcast)
|
|
RTA_PUT(skb, IFA_BROADCAST, 4, &ifa->ifa_broadcast);
|
|
if (ifa->ifa_anycast)
|
|
RTA_PUT(skb, IFA_ANYCAST, 4, &ifa->ifa_anycast);
|
|
if (ifa->ifa_label[0])
|
|
RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
|
|
nlh->nlmsg_len = skb->tail - b;
|
|
return skb->len;
|
|
|
|
nlmsg_failure:
|
|
rtattr_failure:
|
|
skb_trim(skb, b - skb->data);
|
|
return -1;
|
|
}
|
|
|
|
static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int idx, ip_idx;
|
|
struct net_device *dev;
|
|
struct in_device *in_dev;
|
|
struct in_ifaddr *ifa;
|
|
int s_ip_idx, s_idx = cb->args[0];
|
|
|
|
s_ip_idx = ip_idx = cb->args[1];
|
|
read_lock(&dev_base_lock);
|
|
for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
|
|
if (idx < s_idx)
|
|
continue;
|
|
if (idx > s_idx)
|
|
s_ip_idx = 0;
|
|
rcu_read_lock();
|
|
if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
|
|
rcu_read_unlock();
|
|
continue;
|
|
}
|
|
|
|
for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
|
|
ifa = ifa->ifa_next, ip_idx++) {
|
|
if (ip_idx < s_ip_idx)
|
|
continue;
|
|
if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq,
|
|
RTM_NEWADDR, NLM_F_MULTI) <= 0) {
|
|
rcu_read_unlock();
|
|
goto done;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
done:
|
|
read_unlock(&dev_base_lock);
|
|
cb->args[0] = idx;
|
|
cb->args[1] = ip_idx;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static void rtmsg_ifa(int event, struct in_ifaddr* ifa)
|
|
{
|
|
int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + 128);
|
|
struct sk_buff *skb = alloc_skb(size, GFP_KERNEL);
|
|
|
|
if (!skb)
|
|
netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, ENOBUFS);
|
|
else if (inet_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
|
|
kfree_skb(skb);
|
|
netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, EINVAL);
|
|
} else {
|
|
netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV4_IFADDR, GFP_KERNEL);
|
|
}
|
|
}
|
|
|
|
static struct rtnetlink_link inet_rtnetlink_table[RTM_NR_MSGTYPES] = {
|
|
[RTM_NEWADDR - RTM_BASE] = { .doit = inet_rtm_newaddr, },
|
|
[RTM_DELADDR - RTM_BASE] = { .doit = inet_rtm_deladdr, },
|
|
[RTM_GETADDR - RTM_BASE] = { .dumpit = inet_dump_ifaddr, },
|
|
[RTM_NEWROUTE - RTM_BASE] = { .doit = inet_rtm_newroute, },
|
|
[RTM_DELROUTE - RTM_BASE] = { .doit = inet_rtm_delroute, },
|
|
[RTM_GETROUTE - RTM_BASE] = { .doit = inet_rtm_getroute,
|
|
.dumpit = inet_dump_fib, },
|
|
#ifdef CONFIG_IP_MULTIPLE_TABLES
|
|
[RTM_NEWRULE - RTM_BASE] = { .doit = inet_rtm_newrule, },
|
|
[RTM_DELRULE - RTM_BASE] = { .doit = inet_rtm_delrule, },
|
|
[RTM_GETRULE - RTM_BASE] = { .dumpit = inet_dump_rules, },
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
void inet_forward_change(void)
|
|
{
|
|
struct net_device *dev;
|
|
int on = ipv4_devconf.forwarding;
|
|
|
|
ipv4_devconf.accept_redirects = !on;
|
|
ipv4_devconf_dflt.forwarding = on;
|
|
|
|
read_lock(&dev_base_lock);
|
|
for (dev = dev_base; dev; dev = dev->next) {
|
|
struct in_device *in_dev;
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(dev);
|
|
if (in_dev)
|
|
in_dev->cnf.forwarding = on;
|
|
rcu_read_unlock();
|
|
}
|
|
read_unlock(&dev_base_lock);
|
|
|
|
rt_cache_flush(0);
|
|
}
|
|
|
|
static int devinet_sysctl_forward(ctl_table *ctl, int write,
|
|
struct file* filp, void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
int *valp = ctl->data;
|
|
int val = *valp;
|
|
int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
|
|
|
|
if (write && *valp != val) {
|
|
if (valp == &ipv4_devconf.forwarding)
|
|
inet_forward_change();
|
|
else if (valp != &ipv4_devconf_dflt.forwarding)
|
|
rt_cache_flush(0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ipv4_doint_and_flush(ctl_table *ctl, int write,
|
|
struct file* filp, void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
int *valp = ctl->data;
|
|
int val = *valp;
|
|
int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
|
|
|
|
if (write && *valp != val)
|
|
rt_cache_flush(0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
|
|
void __user *oldval, size_t __user *oldlenp,
|
|
void __user *newval, size_t newlen,
|
|
void **context)
|
|
{
|
|
int *valp = table->data;
|
|
int new;
|
|
|
|
if (!newval || !newlen)
|
|
return 0;
|
|
|
|
if (newlen != sizeof(int))
|
|
return -EINVAL;
|
|
|
|
if (get_user(new, (int __user *)newval))
|
|
return -EFAULT;
|
|
|
|
if (new == *valp)
|
|
return 0;
|
|
|
|
if (oldval && oldlenp) {
|
|
size_t len;
|
|
|
|
if (get_user(len, oldlenp))
|
|
return -EFAULT;
|
|
|
|
if (len) {
|
|
if (len > table->maxlen)
|
|
len = table->maxlen;
|
|
if (copy_to_user(oldval, valp, len))
|
|
return -EFAULT;
|
|
if (put_user(len, oldlenp))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
*valp = new;
|
|
rt_cache_flush(0);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static struct devinet_sysctl_table {
|
|
struct ctl_table_header *sysctl_header;
|
|
ctl_table devinet_vars[__NET_IPV4_CONF_MAX];
|
|
ctl_table devinet_dev[2];
|
|
ctl_table devinet_conf_dir[2];
|
|
ctl_table devinet_proto_dir[2];
|
|
ctl_table devinet_root_dir[2];
|
|
} devinet_sysctl = {
|
|
.devinet_vars = {
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_FORWARDING,
|
|
.procname = "forwarding",
|
|
.data = &ipv4_devconf.forwarding,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &devinet_sysctl_forward,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_MC_FORWARDING,
|
|
.procname = "mc_forwarding",
|
|
.data = &ipv4_devconf.mc_forwarding,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_ACCEPT_REDIRECTS,
|
|
.procname = "accept_redirects",
|
|
.data = &ipv4_devconf.accept_redirects,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_SECURE_REDIRECTS,
|
|
.procname = "secure_redirects",
|
|
.data = &ipv4_devconf.secure_redirects,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_SHARED_MEDIA,
|
|
.procname = "shared_media",
|
|
.data = &ipv4_devconf.shared_media,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_RP_FILTER,
|
|
.procname = "rp_filter",
|
|
.data = &ipv4_devconf.rp_filter,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_SEND_REDIRECTS,
|
|
.procname = "send_redirects",
|
|
.data = &ipv4_devconf.send_redirects,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE,
|
|
.procname = "accept_source_route",
|
|
.data = &ipv4_devconf.accept_source_route,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_PROXY_ARP,
|
|
.procname = "proxy_arp",
|
|
.data = &ipv4_devconf.proxy_arp,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_MEDIUM_ID,
|
|
.procname = "medium_id",
|
|
.data = &ipv4_devconf.medium_id,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_BOOTP_RELAY,
|
|
.procname = "bootp_relay",
|
|
.data = &ipv4_devconf.bootp_relay,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_LOG_MARTIANS,
|
|
.procname = "log_martians",
|
|
.data = &ipv4_devconf.log_martians,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_TAG,
|
|
.procname = "tag",
|
|
.data = &ipv4_devconf.tag,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_ARPFILTER,
|
|
.procname = "arp_filter",
|
|
.data = &ipv4_devconf.arp_filter,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_ARP_ANNOUNCE,
|
|
.procname = "arp_announce",
|
|
.data = &ipv4_devconf.arp_announce,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_ARP_IGNORE,
|
|
.procname = "arp_ignore",
|
|
.data = &ipv4_devconf.arp_ignore,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_NOXFRM,
|
|
.procname = "disable_xfrm",
|
|
.data = &ipv4_devconf.no_xfrm,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &ipv4_doint_and_flush,
|
|
.strategy = &ipv4_doint_and_flush_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_NOPOLICY,
|
|
.procname = "disable_policy",
|
|
.data = &ipv4_devconf.no_policy,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &ipv4_doint_and_flush,
|
|
.strategy = &ipv4_doint_and_flush_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_FORCE_IGMP_VERSION,
|
|
.procname = "force_igmp_version",
|
|
.data = &ipv4_devconf.force_igmp_version,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &ipv4_doint_and_flush,
|
|
.strategy = &ipv4_doint_and_flush_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_CONF_PROMOTE_SECONDARIES,
|
|
.procname = "promote_secondaries",
|
|
.data = &ipv4_devconf.promote_secondaries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &ipv4_doint_and_flush,
|
|
.strategy = &ipv4_doint_and_flush_strategy,
|
|
},
|
|
},
|
|
.devinet_dev = {
|
|
{
|
|
.ctl_name = NET_PROTO_CONF_ALL,
|
|
.procname = "all",
|
|
.mode = 0555,
|
|
.child = devinet_sysctl.devinet_vars,
|
|
},
|
|
},
|
|
.devinet_conf_dir = {
|
|
{
|
|
.ctl_name = NET_IPV4_CONF,
|
|
.procname = "conf",
|
|
.mode = 0555,
|
|
.child = devinet_sysctl.devinet_dev,
|
|
},
|
|
},
|
|
.devinet_proto_dir = {
|
|
{
|
|
.ctl_name = NET_IPV4,
|
|
.procname = "ipv4",
|
|
.mode = 0555,
|
|
.child = devinet_sysctl.devinet_conf_dir,
|
|
},
|
|
},
|
|
.devinet_root_dir = {
|
|
{
|
|
.ctl_name = CTL_NET,
|
|
.procname = "net",
|
|
.mode = 0555,
|
|
.child = devinet_sysctl.devinet_proto_dir,
|
|
},
|
|
},
|
|
};
|
|
|
|
static void devinet_sysctl_register(struct in_device *in_dev,
|
|
struct ipv4_devconf *p)
|
|
{
|
|
int i;
|
|
struct net_device *dev = in_dev ? in_dev->dev : NULL;
|
|
struct devinet_sysctl_table *t = kmalloc(sizeof(*t), GFP_KERNEL);
|
|
char *dev_name = NULL;
|
|
|
|
if (!t)
|
|
return;
|
|
memcpy(t, &devinet_sysctl, sizeof(*t));
|
|
for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) {
|
|
t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf;
|
|
t->devinet_vars[i].de = NULL;
|
|
}
|
|
|
|
if (dev) {
|
|
dev_name = dev->name;
|
|
t->devinet_dev[0].ctl_name = dev->ifindex;
|
|
} else {
|
|
dev_name = "default";
|
|
t->devinet_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
|
|
}
|
|
|
|
/*
|
|
* Make a copy of dev_name, because '.procname' is regarded as const
|
|
* by sysctl and we wouldn't want anyone to change it under our feet
|
|
* (see SIOCSIFNAME).
|
|
*/
|
|
dev_name = kstrdup(dev_name, GFP_KERNEL);
|
|
if (!dev_name)
|
|
goto free;
|
|
|
|
t->devinet_dev[0].procname = dev_name;
|
|
t->devinet_dev[0].child = t->devinet_vars;
|
|
t->devinet_dev[0].de = NULL;
|
|
t->devinet_conf_dir[0].child = t->devinet_dev;
|
|
t->devinet_conf_dir[0].de = NULL;
|
|
t->devinet_proto_dir[0].child = t->devinet_conf_dir;
|
|
t->devinet_proto_dir[0].de = NULL;
|
|
t->devinet_root_dir[0].child = t->devinet_proto_dir;
|
|
t->devinet_root_dir[0].de = NULL;
|
|
|
|
t->sysctl_header = register_sysctl_table(t->devinet_root_dir, 0);
|
|
if (!t->sysctl_header)
|
|
goto free_procname;
|
|
|
|
p->sysctl = t;
|
|
return;
|
|
|
|
/* error path */
|
|
free_procname:
|
|
kfree(dev_name);
|
|
free:
|
|
kfree(t);
|
|
return;
|
|
}
|
|
|
|
static void devinet_sysctl_unregister(struct ipv4_devconf *p)
|
|
{
|
|
if (p->sysctl) {
|
|
struct devinet_sysctl_table *t = p->sysctl;
|
|
p->sysctl = NULL;
|
|
unregister_sysctl_table(t->sysctl_header);
|
|
kfree(t->devinet_dev[0].procname);
|
|
kfree(t);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void __init devinet_init(void)
|
|
{
|
|
register_gifconf(PF_INET, inet_gifconf);
|
|
register_netdevice_notifier(&ip_netdev_notifier);
|
|
rtnetlink_links[PF_INET] = inet_rtnetlink_table;
|
|
#ifdef CONFIG_SYSCTL
|
|
devinet_sysctl.sysctl_header =
|
|
register_sysctl_table(devinet_sysctl.devinet_root_dir, 0);
|
|
devinet_sysctl_register(NULL, &ipv4_devconf_dflt);
|
|
#endif
|
|
}
|
|
|
|
EXPORT_SYMBOL(devinet_ioctl);
|
|
EXPORT_SYMBOL(in_dev_finish_destroy);
|
|
EXPORT_SYMBOL(inet_select_addr);
|
|
EXPORT_SYMBOL(inetdev_by_index);
|
|
EXPORT_SYMBOL(register_inetaddr_notifier);
|
|
EXPORT_SYMBOL(unregister_inetaddr_notifier);
|