Release 4.8 net/ipv6/addrconf.c

/*
 *      IPv6 Address [auto]configuration
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *      Alexey Kuznetsov        <kuznet@ms2.inr.ac.ru>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

/*
 *      Changes:
 *
 *      Janos Farkas                    :       delete timer on ifdown
 *      <chexum@bankinf.banki.hu>
 *      Andi Kleen                      :       kill double kfree on module
 *                                              unload.
 *      Maciej W. Rozycki               :       FDDI support
 *      sekiya@USAGI                    :       Don't send too many RS
 *                                              packets.
 *      yoshfuji@USAGI                  :       Fixed interval between DAD
 *                                              packets.
 *      YOSHIFUJI Hideaki @USAGI        :       improved accuracy of
 *                                              address validation timer.
 *      YOSHIFUJI Hideaki @USAGI        :       Privacy Extensions (RFC3041)
 *                                              support.
 *      Yuji SEKIYA @USAGI              :       Don't assign a same IPv6
 *                                              address on a same interface.
 *      YOSHIFUJI Hideaki @USAGI        :       ARCnet support
 *      YOSHIFUJI Hideaki @USAGI        :       convert /proc/net/if_inet6 to
 *                                              seq_file.
 *      YOSHIFUJI Hideaki @USAGI        :       improved source address
 *                                              selection; consider scope,
 *                                              status etc.
 */


#define pr_fmt(fmt) "IPv6: " fmt

#include <linux/errno.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/inet.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_addr.h>
#include <linux/if_arp.h>
#include <linux/if_arcnet.h>
#include <linux/if_infiniband.h>
#include <linux/route.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
#include <linux/slab.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
#include <linux/capability.h>
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/string.h>
#include <linux/hash.h>

#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/snmp.h>

#include <net/6lowpan.h>
#include <net/firewire.h>
#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/tcp.h>
#include <net/ip.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/l3mdev.h>
#include <linux/if_tunnel.h>
#include <linux/rtnetlink.h>
#include <linux/netconf.h>
#include <linux/random.h>
#include <linux/uaccess.h>
#include <asm/unaligned.h>

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.h>

/* Set to 3 to get tracing... */

#define ACONF_DEBUG 2

#if ACONF_DEBUG >= 3

#define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
#else

#define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
#endif


#define	INFINITY_LIFE_TIME	0xFFFFFFFF


#define IPV6_MAX_STRLEN \
	sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")



static inline u32 cstamp_delta(unsigned long cstamp)
{
	return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
}

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#ifdef CONFIG_SYSCTL
static int addrconf_sysctl_register(struct inet6_dev *idev);
static void addrconf_sysctl_unregister(struct inet6_dev *idev);
#else


static inline int addrconf_sysctl_register(struct inet6_dev *idev)
{
	return 0;
}

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static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
{
}
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#endif

static void __ipv6_regen_rndid(struct inet6_dev *idev);
static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
static void ipv6_regen_rndid(unsigned long data);

static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
static int ipv6_count_addresses(struct inet6_dev *idev);
static int ipv6_generate_stable_address(struct in6_addr *addr,
					u8 dad_count,
					const struct inet6_dev *idev);

/*
 *      Configured unicast address hash table
 */

static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
static DEFINE_SPINLOCK(addrconf_hash_lock);

static void addrconf_verify(void);
static void addrconf_verify_rtnl(void);
static void addrconf_verify_work(struct work_struct *);


static struct workqueue_struct *addrconf_wq;
static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work);

static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);

static void addrconf_type_change(struct net_device *dev,
				 unsigned long event);
static int addrconf_ifdown(struct net_device *dev, int how);

static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
						  int plen,
						  const struct net_device *dev,
						  u32 flags, u32 noflags);

static void addrconf_dad_start(struct inet6_ifaddr *ifp);
static void addrconf_dad_work(struct work_struct *w);
static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
static void addrconf_dad_run(struct inet6_dev *idev);
static void addrconf_rs_timer(unsigned long data);
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);

static void inet6_prefix_notify(int event, struct inet6_dev *idev,
				struct prefix_info *pinfo);
static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
			       struct net_device *dev);


static struct ipv6_devconf ipv6_devconf __read_mostly = {
	.forwarding		= 0,
	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
	.mtu6			= IPV6_MIN_MTU,
	.accept_ra		= 1,
	.accept_redirects	= 1,
	.autoconf		= 1,
	.force_mld_version	= 0,
	.mldv1_unsolicited_report_interval = 10 * HZ,
	.mldv2_unsolicited_report_interval = HZ,
	.dad_transmits		= 1,
	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
	.use_tempaddr		= 0,
	.temp_valid_lft		= TEMP_VALID_LIFETIME,
	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
	.regen_max_retry	= REGEN_MAX_RETRY,
	.max_desync_factor	= MAX_DESYNC_FACTOR,
	.max_addresses		= IPV6_MAX_ADDRESSES,
	.accept_ra_defrtr	= 1,
	.accept_ra_from_local	= 0,
	.accept_ra_min_hop_limit= 1,
	.accept_ra_pinfo	= 1,
#ifdef CONFIG_IPV6_ROUTER_PREF
	.accept_ra_rtr_pref	= 1,
	.rtr_probe_interval	= 60 * HZ,
#ifdef CONFIG_IPV6_ROUTE_INFO
	.accept_ra_rt_info_max_plen = 0,
#endif
#endif
	.proxy_ndp		= 0,
	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
	.disable_ipv6		= 0,
	.accept_dad		= 1,
	.suppress_frag_ndisc	= 1,
	.accept_ra_mtu		= 1,
	.stable_secret		= {
		.initialized = false,
        },
	.use_oif_addrs_only	= 0,
	.ignore_routes_with_linkdown = 0,
	.keep_addr_on_down	= 0,
};


static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
	.forwarding		= 0,
	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
	.mtu6			= IPV6_MIN_MTU,
	.accept_ra		= 1,
	.accept_redirects	= 1,
	.autoconf		= 1,
	.force_mld_version	= 0,
	.mldv1_unsolicited_report_interval = 10 * HZ,
	.mldv2_unsolicited_report_interval = HZ,
	.dad_transmits		= 1,
	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
	.use_tempaddr		= 0,
	.temp_valid_lft		= TEMP_VALID_LIFETIME,
	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
	.regen_max_retry	= REGEN_MAX_RETRY,
	.max_desync_factor	= MAX_DESYNC_FACTOR,
	.max_addresses		= IPV6_MAX_ADDRESSES,
	.accept_ra_defrtr	= 1,
	.accept_ra_from_local	= 0,
	.accept_ra_min_hop_limit= 1,
	.accept_ra_pinfo	= 1,
#ifdef CONFIG_IPV6_ROUTER_PREF
	.accept_ra_rtr_pref	= 1,
	.rtr_probe_interval	= 60 * HZ,
#ifdef CONFIG_IPV6_ROUTE_INFO
	.accept_ra_rt_info_max_plen = 0,
#endif
#endif
	.proxy_ndp		= 0,
	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
	.disable_ipv6		= 0,
	.accept_dad		= 1,
	.suppress_frag_ndisc	= 1,
	.accept_ra_mtu		= 1,
	.stable_secret		= {
		.initialized = false,
        },
	.use_oif_addrs_only	= 0,
	.ignore_routes_with_linkdown = 0,
	.keep_addr_on_down	= 0,
};

/* Check if a valid qdisc is available */


static inline bool addrconf_qdisc_ok(const struct net_device *dev)
{
	return !qdisc_tx_is_noop(dev);
}

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static void addrconf_del_rs_timer(struct inet6_dev *idev)
{
	if (del_timer(&idev->rs_timer))
		__in6_dev_put(idev);
}

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hannes frederic sowa
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static void addrconf_del_dad_work(struct inet6_ifaddr *ifp)
{
	if (cancel_delayed_work(&ifp->dad_work))
		__in6_ifa_put(ifp);
}

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19.23%
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66.67%
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26
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static void addrconf_mod_rs_timer(struct inet6_dev *idev,
				  unsigned long when)
{
	if (!timer_pending(&idev->rs_timer))
		in6_dev_hold(idev);
	mod_timer(&idev->rs_timer, jiffies + when);
}

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hannes frederic sowa
42
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2.33%
1
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43
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static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp,
				   unsigned long delay)
{
	if (!delayed_work_pending(&ifp->dad_work))
		in6_ifa_hold(ifp);
	mod_delayed_work(addrconf_wq, &ifp->dad_work, delay);
}

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33.33%
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12
27.91%
2
66.67%
Total
43
100.00%
3
100.00%



static int snmp6_alloc_dev(struct inet6_dev *idev)
{
	int i;

	idev->stats.ipv6 = alloc_percpu(struct ipstats_mib);
	if (!idev->stats.ipv6)
		goto err_ip;

	for_each_possible_cpu(i) {
		struct ipstats_mib *addrconf_stats;
		addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i);
		u64_stats_init(&addrconf_stats->syncp);
	}


	idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
					GFP_KERNEL);
	if (!idev->stats.icmpv6dev)
		goto err_icmp;
	idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
					   GFP_KERNEL);
	if (!idev->stats.icmpv6msgdev)
		goto err_icmpmsg;

	return 0;

err_icmpmsg:
	kfree(idev->stats.icmpv6dev);
err_icmp:
	free_percpu(idev->stats.ipv6);
err_ip:
	return -ENOMEM;
}

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eric dumazet
38
23.90%
2
28.57%
john stultz
john stultz
35
22.01%
1
14.29%
david l stevens
david l stevens
22
13.84%
1
14.29%
americo wang
americo wang
12
7.55%
1
14.29%
pavel emelianov
pavel emelianov
2
1.26%
1
14.29%
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159
100.00%
7
100.00%



static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
{
	struct inet6_dev *ndev;
	int err = -ENOMEM;

	ASSERT_RTNL();

	if (dev->mtu < IPV6_MIN_MTU)
		return ERR_PTR(-EINVAL);

	ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
	if (!ndev)
		return ERR_PTR(err);

	rwlock_init(&ndev->lock);
	ndev->dev = dev;
	INIT_LIST_HEAD(&ndev->addr_list);
	setup_timer(&ndev->rs_timer, addrconf_rs_timer,
		    (unsigned long)ndev);
	memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));

	if (ndev->cnf.stable_secret.initialized)
		ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
	else
		ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64;

	ndev->cnf.mtu6 = dev->mtu;
	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
	if (!ndev->nd_parms) {
		kfree(ndev);
		return ERR_PTR(err);
	}
	if (ndev->cnf.forwarding)
		dev_disable_lro(dev);
	/* We refer to the device */
	dev_hold(dev);

	if (snmp6_alloc_dev(ndev) < 0) {
		ADBG(KERN_WARNING
			"%s: cannot allocate memory for statistics; dev=%s.\n",
			__func__, dev->name);
		neigh_parms_release(&nd_tbl, ndev->nd_parms);
		dev_put(dev);
		kfree(ndev);
		return ERR_PTR(err);
	}

	if (snmp6_register_dev(ndev) < 0) {
		ADBG(KERN_WARNING
			"%s: cannot create /proc/net/dev_snmp6/%s\n",
			__func__, dev->name);
		goto err_release;
	}

	/* One reference from device.  We must do this before
         * we invoke __ipv6_regen_rndid().
         */
	in6_dev_hold(ndev);

	if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
		ndev->cnf.accept_dad = -1;

#if IS_ENABLED(CONFIG_IPV6_SIT)
	if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
		pr_info("%s: Disabled Multicast RS\n", dev->name);
		ndev->cnf.rtr_solicits = 0;
	}
#endif

	INIT_LIST_HEAD(&ndev->tempaddr_list);
	setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
	if ((dev->flags&IFF_LOOPBACK) ||
	    dev->type == ARPHRD_TUNNEL ||
	    dev->type == ARPHRD_TUNNEL6 ||
	    dev->type == ARPHRD_SIT ||
	    dev->type == ARPHRD_NONE) {
		ndev->cnf.use_tempaddr = -1;
	} else {
		in6_dev_hold(ndev);
		ipv6_regen_rndid((unsigned long) ndev);
	}

	ndev->token = in6addr_any;

	if (netif_running(dev) && addrconf_qdisc_ok(dev))
		ndev->if_flags |= IF_READY;

	ipv6_mc_init_dev(ndev);
	ndev->tstamp = jiffies;
	err = addrconf_sysctl_register(ndev);
	if (err) {
		ipv6_mc_destroy_dev(ndev);
		del_timer(&ndev->regen_timer);
		snmp6_unregister_dev(ndev);
		goto err_release;
	}
	/* protected by rtnl_lock */
	rcu_assign_pointer(dev->ip6_ptr, ndev);

	/* Join interface-local all-node multicast group */
	ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);

	/* Join all-node multicast group */
	ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);

	/* Join all-router multicast group if forwarding is set */
	if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
		ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);

	return ndev;

err_release:
	neigh_parms_release(&nd_tbl, ndev->nd_parms);
	ndev->dead = 1;
	in6_dev_finish_destroy(ndev);
	return ERR_PTR(err);
}

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hideaki yoshifuji
185
30.99%
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18.75%
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pre-git
124
20.77%
8
16.67%
americo wang
americo wang
80
13.40%
2
4.17%
hannes frederic sowa
hannes frederic sowa
48
8.04%
3
6.25%
herbert xu
herbert xu
27
4.52%
2
4.17%
li wei
li wei
25
4.19%
1
2.08%
stephen hemminger
stephen hemminger
16
2.68%
2
4.17%
ben hutchings
ben hutchings
13
2.18%
1
2.08%
pavel emelianov
pavel emelianov
9
1.51%
2
4.17%
david l stevens
david l stevens
9
1.51%
1
2.08%
shirley ma
shirley ma
6
1.01%
1
2.08%
daniel borkmann
daniel borkmann
6
1.01%
2
4.17%
david s. miller
david s. miller
5
0.84%
1
2.08%
sabrina dubroca
sabrina dubroca
5
0.84%
1
2.08%
roy li
roy li
5
0.84%
1
2.08%
linus torvalds
linus torvalds
5
0.84%
1
2.08%
remi denis-courmont
remi denis-courmont
5
0.84%
1
2.08%
andrew morton
andrew morton
4
0.67%
1
2.08%
ding tianhong
ding tianhong
4
0.67%
1
2.08%
ingo oeser
ingo oeser
4
0.67%
1
2.08%
joerg roedel
joerg roedel
3
0.50%
1
2.08%
joe perches
joe perches
3
0.50%
1
2.08%
harvey harrison
harvey harrison
2
0.34%
1
2.08%
ian morris
ian morris
2
0.34%
1
2.08%
mitsuru chinen
mitsuru chinen
1
0.17%
1
2.08%
eric dumazet
eric dumazet
1
0.17%
1
2.08%
Total
597
100.00%
48
100.00%



static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	idev = __in6_dev_get(dev);
	if (!idev) {
		idev = ipv6_add_dev(dev);
		if (IS_ERR(idev))
			return NULL;
	}

	if (dev->flags&IFF_UP)
		ipv6_mc_up(idev);
	return idev;
}

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david l stevens
36
52.94%
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14.29%
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19
27.94%
3
42.86%
stephen hemminger
stephen hemminger
9
13.24%
1
14.29%
americo wang
americo wang
3
4.41%
1
14.29%
hideaki yoshifuji
hideaki yoshifuji
1
1.47%
1
14.29%
Total
68
100.00%
7
100.00%



static int inet6_netconf_msgsize_devconf(int type)
{
	int size =  NLMSG_ALIGN(sizeof(struct netconfmsg))
		    + nla_total_size(4);	/* NETCONFA_IFINDEX */
	bool all = false;

	if (type == NETCONFA_ALL)
		all = true;

	if (all || type == NETCONFA_FORWARDING)
		size += nla_total_size(4);
#ifdef CONFIG_IPV6_MROUTE
	if (all || type == NETCONFA_MC_FORWARDING)
		size += nla_total_size(4);
#endif
	if (all || type == NETCONFA_PROXY_NEIGH)
		size += nla_total_size(4);

	if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN)
		size += nla_total_size(4);

	return size;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
60
54.55%
3
42.86%
zhang shengju
zhang shengju
17
15.45%
1
14.29%
andy gospodarek
andy gospodarek
14
12.73%
1
14.29%
stephen hemminger
stephen hemminger
14
12.73%
1
14.29%
david s. miller
david s. miller
5
4.55%
1
14.29%
Total
110
100.00%
7
100.00%



static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
				      struct ipv6_devconf *devconf, u32 portid,
				      u32 seq, int event, unsigned int flags,
				      int type)
{
	struct nlmsghdr  *nlh;
	struct netconfmsg *ncm;
	bool all = false;

	nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
			flags);
	if (!nlh)
		return -EMSGSIZE;

	if (type == NETCONFA_ALL)
		all = true;

	ncm = nlmsg_data(nlh);
	ncm->ncm_family = AF_INET6;

	if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
		goto nla_put_failure;

	if ((all || type == NETCONFA_FORWARDING) &&
	    nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
		goto nla_put_failure;
#ifdef CONFIG_IPV6_MROUTE
	if ((all || type == NETCONFA_MC_FORWARDING) &&
	    nla_put_s32(skb, NETCONFA_MC_FORWARDING,
			devconf->mc_forwarding) < 0)
		goto nla_put_failure;
#endif
	if ((all || type == NETCONFA_PROXY_NEIGH) &&
	    nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0)
		goto nla_put_failure;

	if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
	    nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
			devconf->ignore_routes_with_linkdown) < 0)
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
173
68.92%
3
33.33%
andy gospodarek
andy gospodarek
25
9.96%
1
11.11%
stephen hemminger
stephen hemminger
25
9.96%
1
11.11%
zhang shengju
zhang shengju
19
7.57%
1
11.11%
david s. miller
david s. miller
5
1.99%
1
11.11%
johannes berg
johannes berg
3
1.20%
1
11.11%
ian morris
ian morris
1
0.40%
1
11.11%
Total
251
100.00%
9
100.00%



void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
				  struct ipv6_devconf *devconf)
{
	struct sk_buff *skb;
	int err = -ENOBUFS;

	skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL);
	if (!skb)
		goto errout;

	err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
					 RTM_NEWNETCONF, 0, type);
	if (err < 0) {
		/* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
		WARN_ON(err == -EMSGSIZE);
		kfree_skb(skb);
		goto errout;
	}
	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL);
	return;
errout:
	rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
122
97.60%
1
33.33%
eric dumazet
eric dumazet
2
1.60%
1
33.33%
ian morris
ian morris
1
0.80%
1
33.33%
Total
125
100.00%
3
100.00%


static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
	[NETCONFA_IFINDEX]	= { .len = sizeof(int) },
	[NETCONFA_FORWARDING]	= { .len = sizeof(int) },
	[NETCONFA_PROXY_NEIGH]	= { .len = sizeof(int) },
	[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN]	= { .len = sizeof(int) },
};



static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
				     struct nlmsghdr *nlh)
{
	struct net *net = sock_net(in_skb->sk);
	struct nlattr *tb[NETCONFA_MAX+1];
	struct netconfmsg *ncm;
	struct sk_buff *skb;
	struct ipv6_devconf *devconf;
	struct inet6_dev *in6_dev;
	struct net_device *dev;
	int ifindex;
	int err;

	err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
			  devconf_ipv6_policy);
	if (err < 0)
		goto errout;

	err = -EINVAL;
	if (!tb[NETCONFA_IFINDEX])
		goto errout;

	ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
	switch (ifindex) {
	case NETCONFA_IFINDEX_ALL:
		devconf = net->ipv6.devconf_all;
		break;
	case NETCONFA_IFINDEX_DEFAULT:
		devconf = net->ipv6.devconf_dflt;
		break;
	default:
		dev = __dev_get_by_index(net, ifindex);
		if (!dev)
			goto errout;
		in6_dev = __in6_dev_get(dev);
		if (!in6_dev)
			goto errout;
		devconf = &in6_dev->cnf;
		break;
	}

	err = -ENOBUFS;
	skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC);
	if (!skb)
		goto errout;

	err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
					 NETLINK_CB(in_skb).portid,
					 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
					 NETCONFA_ALL);
	if (err < 0) {
		/* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
		WARN_ON(err == -EMSGSIZE);
		kfree_skb(skb);
		goto errout;
	}
	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
errout:
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
287
97.95%
1
25.00%
ian morris
ian morris
3
1.02%
1
25.00%
zhang shengju
zhang shengju
2
0.68%
1
25.00%
anton protopopov
anton protopopov
1
0.34%
1
25.00%
Total
293
100.00%
4
100.00%



static int inet6_netconf_dump_devconf(struct sk_buff *skb,
				      struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	int h, s_h;
	int idx, s_idx;
	struct net_device *dev;
	struct inet6_dev *idev;
	struct hlist_head *head;

	s_h = cb->args[0];
	s_idx = idx = cb->args[1];

	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
		idx = 0;
		head = &net->dev_index_head[h];
		rcu_read_lock();
		cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
			  net->dev_base_seq;
		hlist_for_each_entry_rcu(dev, head, index_hlist) {
			if (idx < s_idx)
				goto cont;
			idev = __in6_dev_get(dev);
			if (!idev)
				goto cont;

			if (inet6_netconf_fill_devconf(skb, dev->ifindex,
						       &idev->cnf,
						       NETLINK_CB(cb->skb).portid,
						       cb->nlh->nlmsg_seq,
						       RTM_NEWNETCONF,
						       NLM_F_MULTI,
						       NETCONFA_ALL) < 0) {
				rcu_read_unlock();
				goto done;
			}
			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
			idx++;
		}
		rcu_read_unlock();
	}
	if (h == NETDEV_HASHENTRIES) {
		if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
					       net->ipv6.devconf_all,
					       NETLINK_CB(cb->skb).portid,
					       cb->nlh->nlmsg_seq,
					       RTM_NEWNETCONF, NLM_F_MULTI,
					       NETCONFA_ALL) < 0)
			goto done;
		else
			h++;
	}
	if (h == NETDEV_HASHENTRIES + 1) {
		if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
					       net->ipv6.devconf_dflt,
					       NETLINK_CB(cb->skb).portid,
					       cb->nlh->nlmsg_seq,
					       RTM_NEWNETCONF, NLM_F_MULTI,
					       NETCONFA_ALL) < 0)
			goto done;
		else
			h++;
	}
done:
	cb->args[0] = h;
	cb->args[1] = idx;

	return skb->len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
353
98.33%
2
50.00%
johannes berg
johannes berg
3
0.84%
1
25.00%
zhang shengju
zhang shengju
3
0.84%
1
25.00%
Total
359
100.00%
4
100.00%

#ifdef CONFIG_SYSCTL


static void dev_forward_change(struct inet6_dev *idev)
{
	struct net_device *dev;
	struct inet6_ifaddr *ifa;

	if (!idev)
		return;
	dev = idev->dev;
	if (idev->cnf.forwarding)
		dev_disable_lro(dev);
	if (dev->flags & IFF_MULTICAST) {
		if (idev->cnf.forwarding) {
			ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
			ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
			ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
		} else {
			ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
			ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
			ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
		}
	}

	list_for_each_entry(ifa, &idev->addr_list, if_list) {
		if (ifa->flags&IFA_F_TENTATIVE)
			continue;
		if (idev->cnf.forwarding)
			addrconf_join_anycast(ifa);
		else
			addrconf_leave_anycast(ifa);
	}
	inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
				     dev->ifindex, &idev->cnf);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
david l stevens
david l stevens
72
41.38%
1
11.11%
hannes frederic sowa
hannes frederic sowa
36
20.69%
1
11.11%
nicolas dichtel
nicolas dichtel
19
10.92%
1
11.11%
ben hutchings
ben hutchings
13
7.47%
1
11.11%
pre-git
pre-git
11
6.32%
1
11.11%
michal wrobel
michal wrobel
9
5.17%
1
11.11%
stephen hemminger
stephen hemminger
8
4.60%
1
11.11%
hideaki yoshifuji
hideaki yoshifuji
6
3.45%
2
22.22%
Total
174
100.00%
9
100.00%



static void addrconf_forward_change(struct net *net, __s32 newf)
{
	struct net_device *dev;
	struct inet6_dev *idev;

	for_each_netdev(net, dev) {
		idev = __in6_dev_get(dev);
		if (idev) {
			int changed = (!idev->cnf.forwarding) ^ (!newf);
			idev->cnf.forwarding = newf;
			if (changed)
				dev_forward_change(idev);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
31
39.24%
4
33.33%
hideaki yoshifuji
hideaki yoshifuji
24
30.38%
1
8.33%
pavel emelianov
pavel emelianov
13
16.46%
3
25.00%
david l stevens
david l stevens
8
10.13%
1
8.33%
ben hutchings
ben hutchings
1
1.27%
1
8.33%
eric dumazet
eric dumazet
1
1.27%
1
8.33%
eric w. biederman
eric w. biederman
1
1.27%
1
8.33%
Total
79
100.00%
12
100.00%



static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
{
	struct net *net;
	int old;

	if (!rtnl_trylock())
		return restart_syscall();

	net = (struct net *)table->extra2;
	old = *p;
	*p = newf;

	if (p == &net->ipv6.devconf_dflt->forwarding) {
		if ((!newf) ^ (!old))
			inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
						     NETCONFA_IFINDEX_DEFAULT,
						     net->ipv6.devconf_dflt);
		rtnl_unlock();
		return 0;
	}

	if (p == &net->ipv6.devconf_all->forwarding) {
		int old_dflt = net->ipv6.devconf_dflt->forwarding;

		net->ipv6.devconf_dflt->forwarding = newf;
		if ((!newf) ^ (!old_dflt))
			inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
						     NETCONFA_IFINDEX_DEFAULT,
						     net->ipv6.devconf_dflt);

		addrconf_forward_change(net, newf);
		if ((!newf) ^ (!old))
			inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
						     NETCONFA_IFINDEX_ALL,
						     net->ipv6.devconf_all);
	} else if ((!newf) ^ (!old))
		dev_forward_change((struct inet6_dev *)table->extra1);
	rtnl_unlock();

	if (newf)
		rt6_purge_dflt_routers(net);
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pavel emelianov
pavel emelianov
106
43.80%
4
36.36%
nicolas dichtel
nicolas dichtel
92
38.02%
2
18.18%
francesco ruggeri
francesco ruggeri
29
11.98%
1
9.09%
stephen hemminger
stephen hemminger
6
2.48%
1
9.09%
daniel lezcano
daniel lezcano
3
1.24%
1
9.09%
ben hutchings
ben hutchings
3
1.24%
1
9.09%
eric w. biederman
eric w. biederman
3
1.24%
1
9.09%
Total
242
100.00%
11
100.00%



static void addrconf_linkdown_change(struct net *net, __s32 newf)
{
	struct net_device *dev;
	struct inet6_dev *idev;

	for_each_netdev(net, dev) {
		idev = __in6_dev_get(dev);
		if (idev) {
			int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);

			idev->cnf.ignore_routes_with_linkdown = newf;
			if (changed)
				inet6_netconf_notify_devconf(dev_net(dev),
							     NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
							     dev->ifindex,
							     &idev->cnf);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andy gospodarek
andy gospodarek
93
100.00%
1
100.00%
Total
93
100.00%
1
100.00%



static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
{
	struct net *net;
	int old;

	if (!rtnl_trylock())
		return restart_syscall();

	net = (struct net *)table->extra2;
	old = *p;
	*p = newf;

	if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) {
		if ((!newf) ^ (!old))
			inet6_netconf_notify_devconf(net,
						     NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
						     NETCONFA_IFINDEX_DEFAULT,
						     net->ipv6.devconf_dflt);
		rtnl_unlock();
		return 0;
	}

	if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) {
		net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf;
		addrconf_linkdown_change(net, newf);
		if ((!newf) ^ (!old))
			inet6_netconf_notify_devconf(net,
						     NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
						     NETCONFA_IFINDEX_ALL,
						     net->ipv6.devconf_all);
	}
	rtnl_unlock();

	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andy gospodarek
andy gospodarek
170
100.00%
1
100.00%
Total
170
100.00%
1
100.00%

#endif

/* Nobody refers to this ifaddr, destroy it */


void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
{
	WARN_ON(!hlist_unhashed(&ifp->addr_lst));

#ifdef NET_REFCNT_DEBUG
	pr_debug("%s\n", __func__);
#endif

	in6_dev_put(ifp->idev);

	if (cancel_delayed_work(&ifp->dad_work))
		pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
			  ifp);

	if (ifp->state != INET6_IFADDR_STATE_DEAD) {
		pr_warn("Freeing alive inet6 address %p\n", ifp);
		return;
	}
	ip6_rt_put(ifp->rt);

	kfree_rcu(ifp, rcu);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
56
62.22%
3
20.00%
stephen hemminger
stephen hemminger
8
8.89%
3
20.00%
hideaki yoshifuji
hideaki yoshifuji
6
6.67%
1
6.67%
linus torvalds
linus torvalds
5
5.56%
1
6.67%
joe perches
joe perches
5
5.56%
2
13.33%
hannes frederic sowa
hannes frederic sowa
3
3.33%
1
6.67%
herbert xu
herbert xu
3
3.33%
1
6.67%
lai jiangshan
lai jiangshan
2
2.22%
1
6.67%
americo wang
americo wang
1
1.11%
1
6.67%
ilpo jarvinen
ilpo jarvinen
1
1.11%
1
6.67%
Total
90
100.00%
15
100.00%


static void

ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
{
	struct list_head *p;
	int ifp_scope = ipv6_addr_src_scope(&ifp->addr);

	/*
         * Each device address list is sorted in order of scope -
         * global before linklocal.
         */
	list_for_each(p, &idev->addr_list) {
		struct inet6_ifaddr *ifa
			= list_entry(p, struct inet6_ifaddr, if_list);
		if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
			break;
	}

	list_add_tail(&ifp->if_list, p);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
brian haley
brian haley
31
39.24%
1
25.00%
stephen hemminger
stephen hemminger
29
36.71%
1
25.00%
hideaki yoshifuji
hideaki yoshifuji
18
22.78%
1
25.00%
david s. miller
david s. miller
1
1.27%
1
25.00%
Total
79
100.00%
4
100.00%



static u32 inet6_addr_hash(const struct in6_addr *addr)
{
	return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
14
60.87%
1
33.33%
eric dumazet
eric dumazet
6
26.09%
1
33.33%
stephen hemminger
stephen hemminger
3
13.04%
1
33.33%
Total
23
100.00%
3
100.00%

/* On success it returns ifp with increased reference count */


static struct inet6_ifaddr *

ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
	      const struct in6_addr *peer_addr, int pfxlen,
	      int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
{
	struct inet6_ifaddr *ifa = NULL;
	struct rt6_info *rt;
	unsigned int hash;
	int err = 0;
	int addr_type = ipv6_addr_type(addr);

	if (addr_type == IPV6_ADDR_ANY ||
	    addr_type & IPV6_ADDR_MULTICAST ||
	    (!(idev->dev->flags & IFF_LOOPBACK) &&
	     addr_type & IPV6_ADDR_LOOPBACK))
		return ERR_PTR(-EADDRNOTAVAIL);

	rcu_read_lock_bh();
	if (idev->dead) {
		err = -ENODEV;			/*XXX*/
		goto out2;
	}

	if (idev->cnf.disable_ipv6) {
		err = -EACCES;
		goto out2;
	}

	spin_lock(&addrconf_hash_lock);

	/* Ignore adding duplicate addresses on an interface */
	if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
		ADBG("ipv6_add_addr: already assigned\n");
		err = -EEXIST;
		goto out;
	}

	ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);

	if (!ifa) {
		ADBG("ipv6_add_addr: malloc failed\n");
		err = -ENOBUFS;
		goto out;
	}

	rt = addrconf_dst_alloc(idev, addr, false);
	if (IS_ERR(rt)) {
		err = PTR_ERR(rt);
		goto out;
	}

	neigh_parms_data_state_setall(idev->nd_parms);

	ifa->addr = *addr;
	if (peer_addr)
		ifa->peer_addr = *peer_addr;

	spin_lock_init(&ifa->lock);
	INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work);
	INIT_HLIST_NODE(&ifa->addr_lst);
	ifa->scope = scope;
	ifa->prefix_len = pfxlen;
	ifa->flags = flags | IFA_F_TENTATIVE;
	ifa->valid_lft = valid_lft;
	ifa->prefered_lft = prefered_lft;
	ifa->cstamp = ifa->tstamp = jiffies;
	ifa->tokenized = false;

	ifa->rt = rt;

	ifa->idev = idev;
	in6_dev_hold(idev);
	/* For caller */
	in6_ifa_hold(ifa);

	/* Add to big hash table */
	hash = inet6_addr_hash(addr);

	hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
	spin_unlock(&addrconf_hash_lock);

	write_lock(&idev->lock);
	/* Add to inet6_dev unicast addr list. */
	ipv6_link_dev_addr(idev, ifa);

	if (ifa->flags&IFA_F_TEMPORARY) {
		list_add(&ifa->tmp_list, &idev->tempaddr_list);
		in6_ifa_hold(ifa);
	}

	in6_ifa_hold(ifa);
	write_unlock(&idev->lock);
out2:
	rcu_read_unlock_bh();

	if (likely(err == 0))
		inet6addr_notifier_call_chain(NETDEV_UP, ifa);
	else {
		kfree(ifa);
		ifa = ERR_PTR(err);
	}

	return ifa;
out:
	spin_unlock(&addrconf_hash_lock);
	goto out2;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
218
43.51%
9
24.32%
pre-git
pre-git
150
29.94%
4
10.81%
stephen hemminger
stephen hemminger
26
5.19%
4
10.81%
jiri pirko
jiri pirko
24
4.79%
2
5.41%
brian haley
brian haley
22
4.39%
2
5.41%
jiri benc
jiri benc
18
3.59%
1
2.70%
shirley ma
shirley ma
10
2.00%
1
2.70%
keir fraser
keir fraser
6
1.20%
1
2.70%
daniel borkmann
daniel borkmann
6
1.20%
1
2.70%
linus torvalds
linus torvalds
5
1.00%
1
2.70%
hannes frederic sowa
hannes frederic sowa
4
0.80%
2
5.41%
benjamin thery
benjamin thery
3
0.60%
1
2.70%
alexey dobriyan
alexey dobriyan
2
0.40%
1
2.70%
jamal hadi salim
jamal hadi salim
1
0.20%
1
2.70%
americo wang
americo wang
1
0.20%
1
2.70%
eric dumazet
eric dumazet
1
0.20%
1
2.70%
daniel lezcano
daniel lezcano
1
0.20%
1
2.70%
ian morris
ian morris
1
0.20%
1
2.70%
david s. miller
david s. miller
1
0.20%
1
2.70%
ingo oeser
ingo oeser
1
0.20%
1
2.70%
Total
501
100.00%
37
100.00%


enum cleanup_prefix_rt_t {
	
CLEANUP_PREFIX_RT_NOP,    /* no cleanup action for prefix route */
	
CLEANUP_PREFIX_RT_DEL,    /* delete the prefix route */
	
CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */
};

/*
 * Check, whether the prefix for ifp would still need a prefix route
 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
 * constants.
 *
 * 1) we don't purge prefix if address was not permanent.
 *    prefix is managed by its own lifetime.
 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
 * 3) if there are no addresses, delete prefix.
 * 4) if there are still other permanent address(es),
 *    corresponding prefix is still permanent.
 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
 *    don't purge the prefix, assume user space is managing it.
 * 6) otherwise, update prefix lifetime to the
 *    longest valid lifetime among the corresponding
 *    addresses on the device.
 *    Note: subsequent RA will update lifetime.
 **/

static enum cleanup_prefix_rt_t

check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
{
	struct inet6_ifaddr *ifa;
	struct inet6_dev *idev = ifp->idev;
	unsigned long lifetime;
	enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL;

	*expires = jiffies;

	list_for_each_entry(ifa, &idev->addr_list, if_list) {
		if (ifa == ifp)
			continue;
		if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
				       ifp->prefix_len))
			continue;
		if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))
			return CLEANUP_PREFIX_RT_NOP;

		action = CLEANUP_PREFIX_RT_EXPIRE;

		spin_lock(&ifa->lock);

		lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
		/*
                 * Note: Because this address is
                 * not permanent, lifetime <
                 * LONG_MAX / HZ here.
                 */
		if (time_before(*expires, ifa->tstamp + lifetime * HZ))
			*expires = ifa->tstamp + lifetime * HZ;
		spin_unlock(&ifa->lock);
	}

	return action;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas haller
thomas haller
105
65.22%
1
14.29%
pre-git
pre-git
39
24.22%
3
42.86%
herbert xu
herbert xu
11
6.83%
1
14.29%
hideaki yoshifuji
hideaki yoshifuji
4
2.48%
1
14.29%
stephen hemminger
stephen hemminger
2
1.24%
1
14.29%
Total
161
100.00%
7
100.00%


static void

cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt)
{
	struct rt6_info *rt;

	rt = addrconf_get_prefix_route(&ifp->addr,
				       ifp->prefix_len,
				       ifp->idev->dev,
				       0, RTF_GATEWAY | RTF_DEFAULT);
	if (rt) {
		if (del_rt)
			ip6_del_rt(rt);
		else {
			if (!(rt->rt6i_flags & RTF_EXPIRES))
				rt6_set_expires(rt, expires);
			ip6_rt_put(rt);
		}
	}
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas haller
thomas haller
59
65.56%
1
14.29%
hideaki yoshifuji
hideaki yoshifuji
20
22.22%
2
28.57%
pre-git
pre-git
7
7.78%
2
28.57%
stephen hemminger
stephen hemminger
4
4.44%
2
28.57%
Total
90
100.00%
7
100.00%

/* This function wants to get referenced ifp and releases it before return */



static void ipv6_del_addr(struct inet6_ifaddr *ifp)
{
	int state;
	enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP;
	unsigned long expires;

	ASSERT_RTNL();

	spin_lock_bh(&ifp->lock);
	state = ifp->state;
	ifp->state = INET6_IFADDR_STATE_DEAD;
	spin_unlock_bh(&ifp->lock);

	if (state == INET6_IFADDR_STATE_DEAD)
		goto out;

	spin_lock_bh(&addrconf_hash_lock);
	hlist_del_init_rcu(&ifp->addr_lst);
	spin_unlock_bh(&addrconf_hash_lock);

	write_lock_bh(&ifp->idev->lock);

	if (ifp->flags&IFA_F_TEMPORARY) {
		list_del(&ifp->tmp_list);
		if (ifp->ifpub) {
			in6_ifa_put(ifp->ifpub);
			ifp->ifpub = NULL;
		}
		__in6_ifa_put(ifp);
	}

	if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE))
		action = check_cleanup_prefix_route(ifp, &expires);

	list_del_init(&ifp->if_list);
	__in6_ifa_put(ifp);

	write_unlock_bh(&ifp->idev->lock);

	addrconf_del_dad_work(ifp);

	ipv6_ifa_notify(RTM_DELADDR, ifp);

	inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);

	if (action != CLEANUP_PREFIX_RT_NOP) {
		cleanup_prefix_route(ifp, expires,
			action == CLEANUP_PREFIX_RT_DEL);
	}

	/* clean up prefsrc entries */
	rt6_remove_prefsrc(ifp);
out:
	in6_ifa_put(ifp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas haller
thomas haller
138
57.74%
1
7.14%
hideaki yoshifuji
hideaki yoshifuji
55
23.01%
1
7.14%
pre-git
pre-git
17
7.11%
3
21.43%
hannes frederic sowa
hannes frederic sowa
6
2.51%
2
14.29%
daniel walter
daniel walter
6
2.51%
1
7.14%
linus torvalds
linus torvalds
4
1.67%
1
7.14%
romain kuntz
romain kuntz
4
1.67%
1
7.14%
andrey vagin
andrey vagin
4
1.67%
1
7.14%
gao feng
gao feng
2
0.84%
1
7.14%
herbert xu
herbert xu
2
0.84%
1
7.14%
li rongqing
li rongqing
1
0.42%
1
7.14%
Total
239
100.00%
14
100.00%



static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
{
	struct inet6_dev *idev = ifp->idev;
	struct in6_addr addr, *tmpaddr;
	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
	unsigned long regen_advance;
	int tmp_plen;
	int ret = 0;
	u32 addr_flags;
	unsigned long now = jiffies;

	write_lock_bh(&idev->lock);
	if (ift) {
		spin_lock_bh(&ift->lock);
		memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
		spin_unlock_bh(&ift->lock);
		tmpaddr = &addr;
	} else {
		tmpaddr = NULL;
	}
retry:
	in6_dev_hold(idev);
	if (idev->cnf.use_tempaddr <= 0) {
		write_unlock_bh(&idev->lock);
		pr_info("%s: use_tempaddr is disabled\n", __func__);
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}
	spin_lock_bh(&ifp->lock);
	if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
		idev->cnf.use_tempaddr = -1;	/*XXX*/
		spin_unlock_bh(&ifp->lock);
		write_unlock_bh(&idev->lock);
		pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
			__func__);
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}
	in6_ifa_hold(ifp);
	memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
	__ipv6_try_regen_rndid(idev, tmpaddr);
	memcpy(&addr.s6_addr[8], idev->rndid, 8);
	age = (now - ifp->tstamp) / HZ;
	tmp_valid_lft = min_t(__u32,
			      ifp->valid_lft,
			      idev->cnf.temp_valid_lft + age);
	tmp_prefered_lft = min_t(__u32,
				 ifp->prefered_lft,
				 idev->cnf.temp_prefered_lft + age -
				 idev->cnf.max_desync_factor);
	tmp_plen = ifp->prefix_len;
	tmp_tstamp = ifp->tstamp;
	spin_unlock_bh(&ifp->lock);

	regen_advance = idev->cnf.regen_max_retry *
			idev->cnf.dad_transmits *
			NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ;
	write_unlock_bh(&idev->lock);

	/* A temporary address is created only if this calculated Preferred
         * Lifetime is greater than REGEN_ADVANCE time units.  In particular,
         * an implementation must not create a temporary address with a zero
         * Preferred Lifetime.
         * Use age calculation as in addrconf_verify to avoid unnecessary
         * temporary addresses being generated.
         */
	age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
	if (tmp_prefered_lft <= regen_advance + age) {
		in6_ifa_put(ifp);
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}

	addr_flags = IFA_F_TEMPORARY;
	/* set in addrconf_prefix_rcv() */
	if (ifp->flags & IFA_F_OPTIMISTIC)
		addr_flags |= IFA_F_OPTIMISTIC;

	ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
			    ipv6_addr_scope(&addr), addr_flags,
			    tmp_valid_lft, tmp_prefered_lft);
	if (IS_ERR(ift)) {
		in6_ifa_put(ifp);
		in6_dev_put(idev);
		pr_info("%s: retry temporary address regeneration\n", __func__);
		tmpaddr = &addr;
		write_lock_bh(&idev->lock);
		goto retry;
	}

	spin_lock_bh(&ift->lock);
	ift->ifpub = ifp;
	ift->cstamp = now;
	ift->tstamp = tmp_tstamp;
	spin_unlock_bh(&ift->lock);

	addrconf_dad_start(ift);
	in6_ifa_put(ift);
	in6_dev_put(idev);
out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
302
52.34%
3
14.29%
pre-git
pre-git
124
21.49%
4
19.05%
benoit boissinot
benoit boissinot
50
8.67%
1
4.76%
neil horman
neil horman
21
3.64%
1
4.76%
glenn wurster
glenn wurster
17
2.95%
1
4.76%
heiner kallweit
heiner kallweit
15
2.60%
1
4.76%
joe perches
joe perches
12
2.08%
1
4.76%
jiri pirko
jiri pirko
12
2.08%
3
14.29%
lorenzo colitti
lorenzo colitti
8
1.39%
1
4.76%
ben hutchings
ben hutchings
5
0.87%
1
4.76%
shirley ma
shirley ma
5
0.87%
1
4.76%
jiri benc
jiri benc
4
0.69%
1
4.76%
hannes frederic sowa
hannes frederic sowa
1
0.17%
1
4.76%
americo wang
americo wang
1
0.17%
1
4.76%
Total
577
100.00%
21
100.00%

/*
 *      Choose an appropriate source address (RFC3484)
 */
enum {
	
IPV6_SADDR_RULE_INIT = 0,
	
IPV6_SADDR_RULE_LOCAL,
	
IPV6_SADDR_RULE_SCOPE,
	
IPV6_SADDR_RULE_PREFERRED,
#ifdef CONFIG_IPV6_MIP6
	
IPV6_SADDR_RULE_HOA,
#endif
	
IPV6_SADDR_RULE_OIF,
	
IPV6_SADDR_RULE_LABEL,
	
IPV6_SADDR_RULE_PRIVACY,
	
IPV6_SADDR_RULE_ORCHID,
	
IPV6_SADDR_RULE_PREFIX,
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	
IPV6_SADDR_RULE_NOT_OPTIMISTIC,
#endif
	
IPV6_SADDR_RULE_MAX
};


struct ipv6_saddr_score {
	
int			rule;
	
int			addr_type;
	
struct inet6_ifaddr	*ifa;
	DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
	
int			scopedist;
	
int			matchlen;
};


struct ipv6_saddr_dst {
	
const struct in6_addr *addr;
	
int ifindex;
	
int scope;
	
int label;
	
unsigned int prefs;
};



static inline int ipv6_saddr_preferred(int type)
{
	if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
		return 1;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
27
96.43%
1
50.00%
dave jones
dave jones
1
3.57%
1
50.00%
Total
28
100.00%
2
100.00%



static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev)
{
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic;
#else
	return false;
#endif
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
erik kline
erik kline
37
100.00%
1
100.00%
Total
37
100.00%
1
100.00%



static int ipv6_get_saddr_eval(struct net *net,
			       struct ipv6_saddr_score *score,
			       struct ipv6_saddr_dst *dst,
			       int i)
{
	int ret;

	if (i <= score->rule) {
		switch (i) {
		case IPV6_SADDR_RULE_SCOPE:
			ret = score->scopedist;
			break;
		case IPV6_SADDR_RULE_PREFIX:
			ret = score->matchlen;
			break;
		default:
			ret = !!test_bit(i, score->scorebits);
		}
		goto out;
	}

	switch (i) {
	case IPV6_SADDR_RULE_INIT:
		/* Rule 0: remember if hiscore is not ready yet */
		ret = !!score->ifa;
		break;
	case IPV6_SADDR_RULE_LOCAL:
		/* Rule 1: Prefer same address */
		ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
		break;
	case IPV6_SADDR_RULE_SCOPE:
		/* Rule 2: Prefer appropriate scope
                 *
                 *      ret
                 *       ^
                 *    -1 |  d 15
                 *    ---+--+-+---> scope
                 *       |
                 *       |             d is scope of the destination.
                 *  B-d  |  \
                 *       |   \      <- smaller scope is better if
                 *  B-15 |    \        if scope is enough for destination.
                 *       |             ret = B - scope (-1 <= scope >= d <= 15).
                 * d-C-1 | /
                 *       |/         <- greater is better
                 *   -C  /             if scope is not enough for destination.
                 *      /|             ret = scope - C (-1 <= d < scope <= 15).
                 *
                 * d - C - 1 < B -15 (for all -1 <= d <= 15).
                 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
                 * Assume B = 0 and we get C > 29.
                 */
		ret = __ipv6_addr_src_scope(score->addr_type);
		if (ret >= dst->scope)
			ret = -ret;
		else
			ret -= 128;	/* 30 is enough */
		score->scopedist = ret;
		break;
	case IPV6_SADDR_RULE_PREFERRED:
	    {
		/* Rule 3: Avoid deprecated and optimistic addresses */
		u8 avoid = IFA_F_DEPRECATED;

		if (!ipv6_use_optimistic_addr(score->ifa->idev))
			avoid |= IFA_F_OPTIMISTIC;
		ret = ipv6_saddr_preferred(score->addr_type) ||
		      !(score->ifa->flags & avoid);
		break;
	    }
#ifdef CONFIG_IPV6_MIP6
	case IPV6_SADDR_RULE_HOA:
	    {
		/* Rule 4: Prefer home address */
		int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
		ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
		break;
	    }
#endif
	case IPV6_SADDR_RULE_OIF:
		/* Rule 5: Prefer outgoing interface */
		ret = (!dst->ifindex ||
		       dst->ifindex == score->ifa->idev->dev->ifindex);
		break;
	case IPV6_SADDR_RULE_LABEL:
		/* Rule 6: Prefer matching label */
		ret = ipv6_addr_label(net,
				      &score->ifa->addr, score->addr_type,
				      score->ifa->idev->dev->ifindex) == dst->label;
		break;
	case IPV6_SADDR_RULE_PRIVACY:
	    {
		/* Rule 7: Prefer public address
                 * Note: prefer temporary address if use_tempaddr >= 2
                 */
		int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
				!!(dst->prefs & IPV6_PREFER_SRC_TMP) :
				score->ifa->idev->cnf.use_tempaddr >= 2;
		ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
		break;
	    }
	case IPV6_SADDR_RULE_ORCHID:
		/* Rule 8-: Prefer ORCHID vs ORCHID or
                 *          non-ORCHID vs non-ORCHID
                 */
		ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
			ipv6_addr_orchid(dst->addr));
		break;
	case IPV6_SADDR_RULE_PREFIX:
		/* Rule 8: Use longest matching prefix */
		ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
		if (ret > score->ifa->prefix_len)
			ret = score->ifa->prefix_len;
		score->matchlen = ret;
		break;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	case IPV6_SADDR_RULE_NOT_OPTIMISTIC:
		/* Optimistic addresses still have lower precedence than other
                 * preferred addresses.
                 */
		ret = !(score->ifa->flags & IFA_F_OPTIMISTIC);
		break;
#endif
	default:
		ret = 0;
	}

	if (ret)
		__set_bit(i, score->scorebits);
	score->rule = i;
out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
411
83.20%
7
43.75%
erik kline
erik kline
47
9.51%
1
6.25%
pre-git
pre-git
18
3.64%
3
18.75%
benjamin thery
benjamin thery
7
1.42%
1
6.25%
neil horman
neil horman
6
1.21%
1
6.25%
alexey kuznetsov
alexey kuznetsov
3
0.61%
1
6.25%
lucas de marchi
lucas de marchi
1
0.20%
1
6.25%
stephen hemminger
stephen hemminger
1
0.20%
1
6.25%
Total
494
100.00%
16
100.00%



static int __ipv6_dev_get_saddr(struct net *net,
				struct ipv6_saddr_dst *dst,
				struct inet6_dev *idev,
				struct ipv6_saddr_score *scores,
				int hiscore_idx)
{
	struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx];

	read_lock_bh(&idev->lock);
	list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
		int i;

		/*
                 * - Tentative Address (RFC2462 section 5.4)
                 *  - A tentative address is not considered
                 *    "assigned to an interface" in the traditional
                 *    sense, unless it is also flagged as optimistic.
                 * - Candidate Source Address (section 4)
                 *  - In any case, anycast addresses, multicast
                 *    addresses, and the unspecified address MUST
                 *    NOT be included in a candidate set.
                 */
		if ((score->ifa->flags & IFA_F_TENTATIVE) &&
		    (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
			continue;

		score->addr_type = __ipv6_addr_type(&score->ifa->addr);

		if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
			     score->addr_type & IPV6_ADDR_MULTICAST)) {
			net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
					    idev->dev->name);
			continue;
		}

		score->rule = -1;
		bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);

		for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
			int minihiscore, miniscore;

			minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i);
			miniscore = ipv6_get_saddr_eval(net, score, dst, i);

			if (minihiscore > miniscore) {
				if (i == IPV6_SADDR_RULE_SCOPE &&
				    score->scopedist > 0) {
					/*
                                         * special case:
                                         * each remaining entry
                                         * has too small (not enough)
                                         * scope, because ifa entries
                                         * are sorted by their scope
                                         * values.
                                         */
					goto out;
				}
				break;
			} else if (minihiscore < miniscore) {
				if (hiscore->ifa)
					in6_ifa_put(hiscore->ifa);

				in6_ifa_hold(score->ifa);

				swap(hiscore, score);
				hiscore_idx = 1 - hiscore_idx;

				/* restore our iterator */
				score->ifa = hiscore->ifa;

				break;
			}
		}
	}
out:
	read_unlock_bh(&idev->lock);
	return hiscore_idx;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
209
70.13%
4
20.00%
yoshifuji hideaki
yoshifuji hideaki
36
12.08%
2
10.00%
pre-git
pre-git
18
6.04%
3
15.00%
stephen hemminger
stephen hemminger
8
2.68%
1
5.00%
brian haley
brian haley
5
1.68%
1
5.00%
benjamin thery
benjamin thery
4
1.34%
1
5.00%
ilpo jarvinen
ilpo jarvinen
4
1.34%
1
5.00%
juha-matti tapio
juha-matti tapio
3
1.01%
1
5.00%
noriaki takamiya
noriaki takamiya
3
1.01%
1
5.00%
linus torvalds
linus torvalds
3
1.01%
1
5.00%
joe perches
joe perches
2
0.67%
1
5.00%
masahide nakamura
masahide nakamura
1
0.34%
1
5.00%
alexey kuznetsov
alexey kuznetsov
1
0.34%
1
5.00%
yan zheng
yan zheng
1
0.34%
1
5.00%
Total
298
100.00%
20
100.00%



static int ipv6_get_saddr_master(struct net *net,
				 const struct net_device *dst_dev,
				 const struct net_device *master,
				 struct ipv6_saddr_dst *dst,
				 struct ipv6_saddr_score *scores,
				 int hiscore_idx)
{
	struct inet6_dev *idev;

	idev = __in6_dev_get(dst_dev);
	if (idev)
		hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev,
						   scores, hiscore_idx);

	idev = __in6_dev_get(master);
	if (idev)
		hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev,
						   scores, hiscore_idx);

	return hiscore_idx;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
david ahern
david ahern
96
100.00%
1
100.00%
Total
96
100.00%
1
100.00%



int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
		       const struct in6_addr *daddr, unsigned int prefs,
		       struct in6_addr *saddr)
{
	struct ipv6_saddr_score scores[2], *hiscore;
	struct ipv6_saddr_dst dst;
	struct inet6_dev *idev;
	struct net_device *dev;
	int dst_type;
	bool use_oif_addr = false;
	int hiscore_idx = 0;

	dst_type = __ipv6_addr_type(daddr);
	dst.addr = daddr;
	dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
	dst.scope = __ipv6_addr_src_scope(dst_type);
	dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
	dst.prefs = prefs;

	scores[hiscore_idx].rule = -1;
	scores[hiscore_idx].ifa = NULL;

	rcu_read_lock();

	/* Candidate Source Address (section 4)
         *  - multicast and link-local destination address,
         *    the set of candidate source address MUST only
         *    include addresses assigned to interfaces
         *    belonging to the same link as the outgoing
         *    interface.
         * (- For site-local destination addresses, the
         *    set of candidate source addresses MUST only
         *    include addresses assigned to interfaces
         *    belonging to the same site as the outgoing
         *    interface.)
         *  - "It is RECOMMENDED that the candidate source addresses
         *    be the set of unicast addresses assigned to the
         *    interface that will be used to send to the destination
         *    (the 'outgoing' interface)." (RFC 6724)
         */
	if (dst_dev) {
		idev = __in6_dev_get(dst_dev);
		if ((dst_type & IPV6_ADDR_MULTICAST) ||
		    dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL ||
		    (idev && idev->cnf.use_oif_addrs_only)) {
			use_oif_addr = true;
		}
	}

	if (use_oif_addr) {
		if (idev)
			hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
	} else {
		const struct net_device *master;
		int master_idx = 0;

		/* if dst_dev exists and is enslaved to an L3 device, then
                 * prefer addresses from dst_dev and then the master over
                 * any other enslaved devices in the L3 domain.
                 */
		master = l3mdev_master_dev_rcu(dst_dev);
		if (master) {
			master_idx = master->ifindex;

			hiscore_idx = ipv6_get_saddr_master(net, dst_dev,
							    master, &dst,
							    scores, hiscore_idx);

			if (scores[hiscore_idx].ifa)
				goto out;
		}

		for_each_netdev_rcu(net, dev) {
			/* only consider addresses on devices in the
                         * same L3 domain
                         */
			if (l3mdev_master_ifindex_rcu(dev) != master_idx)
				continue;
			idev = __in6_dev_get(dev);
			if (!idev)
				continue;
			hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
		}
	}

out:
	rcu_read_unlock();

	hiscore = &scores[hiscore_idx];
	if (!hiscore->ifa)
		return -EADDRNOTAVAIL;

	*saddr = hiscore->ifa->addr;
	in6_ifa_put(hiscore->ifa);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
yoshifuji hideaki
yoshifuji hideaki
246
66.13%
2
20.00%
david ahern
david ahern
74
19.89%
1
10.00%
erik kline
erik kline
18
4.84%
1
10.00%
hideaki yoshifuji
hideaki yoshifuji
17
4.57%
3
30.00%
david l stevens
david l stevens
14
3.76%
1
10.00%
alexey dobriyan
alexey dobriyan
2
0.54%
1
10.00%
pre-git
pre-git
1
0.27%
1
10.00%
Total
372
100.00%
10
100.00%


EXPORT_SYMBOL(ipv6_dev_get_saddr);



int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
		      u32 banned_flags)
{
	struct inet6_ifaddr *ifp;
	int err = -EADDRNOTAVAIL;

	list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
		if (ifp->scope > IFA_LINK)
			break;
		if (ifp->scope == IFA_LINK &&
		    !(ifp->flags & banned_flags)) {
			*addr = ifp->addr;
			err = 0;
			break;
		}
	}
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
36
43.90%
1
12.50%
hannes frederic sowa
hannes frederic sowa
19
23.17%
2
25.00%
pre-git
pre-git
14
17.07%
1
12.50%
stephen hemminger
stephen hemminger
7
8.54%
1
12.50%
neil horman
neil horman
3
3.66%
1
12.50%
alexey dobriyan
alexey dobriyan
2
2.44%
1
12.50%
jiri pirko
jiri pirko
1
1.22%
1
12.50%
Total
82
100.00%
8
100.00%



int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    u32 banned_flags)
{
	struct inet6_dev *idev;
	int err = -EADDRNOTAVAIL;

	rcu_read_lock();
	idev = __in6_dev_get(dev);
	if (idev) {
		read_lock_bh(&idev->lock);
		err = __ipv6_get_lladdr(idev, addr, banned_flags);
		read_unlock_bh(&idev->lock);
	}
	rcu_read_unlock();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hannes frederic sowa
hannes frederic sowa
61
78.21%
1
16.67%
hideaki yoshifuji
hideaki yoshifuji
12
15.38%
2
33.33%
pre-git
pre-git
4
5.13%
2
33.33%
jiri pirko
jiri pirko
1
1.28%
1
16.67%
Total
78
100.00%
6
100.00%



static int ipv6_count_addresses(struct inet6_dev *idev)
{
	int cnt = 0;
	struct inet6_ifaddr *ifp;

	read_lock_bh(&idev->lock);
	list_for_each_entry(ifp, &idev->addr_list, if_list)
		cnt++;
	read_unlock_bh(&idev->lock);
	return cnt;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
39
76.47%
1
33.33%
stephen hemminger
stephen hemminger
8
15.69%
1
33.33%
pre-git
pre-git
4
7.84%
1
33.33%
Total
51
100.00%
3
100.00%



int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
		  const struct net_device *dev, int strict)
{
	return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
erik kline
erik kline
15
38.46%
1
12.50%
pre-git
pre-git
7
17.95%
2
25.00%
hideaki yoshifuji
hideaki yoshifuji
7
17.95%
1
12.50%
daniel lezcano
daniel lezcano
5
12.82%
1
12.50%
ville nuorvala
ville nuorvala
3
7.69%
1
12.50%
eric dumazet
eric dumazet
1
2.56%
1
12.50%
florian westphal
florian westphal
1
2.56%
1
12.50%
Total
39
100.00%
8
100.00%


EXPORT_SYMBOL(ipv6_chk_addr);



int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
			    const struct net_device *dev, int strict,
			    u32 banned_flags)
{
	struct inet6_ifaddr *ifp;
	unsigned int hash = inet6_addr_hash(addr);
	u32 ifp_flags;

	rcu_read_lock_bh();
	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
		if (!net_eq(dev_net(ifp->idev->dev), net))
			continue;
		/* Decouple optimistic from tentative for evaluation here.
                 * Ban optimistic addresses explicitly, when required.
                 */
		ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC)
			    ? (ifp->flags&~IFA_F_TENTATIVE)
			    : ifp->flags;
		if (ipv6_addr_equal(&ifp->addr, addr) &&
		    !(ifp_flags&banned_flags) &&
		    (!dev || ifp->idev->dev == dev ||
		     !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
			rcu_read_unlock_bh();
			return 1;
		}
	}

	rcu_read_unlock_bh();
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
erik kline
erik kline
56
34.78%
1
6.25%
hideaki yoshifuji
hideaki yoshifuji
56
34.78%
4
25.00%
stephen hemminger
stephen hemminger
26
16.15%
4
25.00%
daniel lezcano
daniel lezcano
10
6.21%
1
6.25%
pre-git
pre-git
9
5.59%
3
18.75%
ville nuorvala
ville nuorvala
2
1.24%
1
6.25%
ian morris
ian morris
1
0.62%
1
6.25%
eric dumazet
eric dumazet
1
0.62%
1
6.25%
Total
161
100.00%
16
100.00%


EXPORT_SYMBOL(ipv6_chk_addr_and_flags);



static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
			       struct net_device *dev)
{
	unsigned int hash = inet6_addr_hash(addr);
	struct inet6_ifaddr *ifp;

	hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
		if (!net_eq(dev_net(ifp->idev->dev), net))
			continue;
		if (ipv6_addr_equal(&ifp->addr, addr)) {
			if (!dev || ifp->idev->dev == dev)
				return true;
		}
	}
	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
58
59.79%
4
44.44%
daniel lezcano
daniel lezcano
15
15.46%
1
11.11%
david s. miller
david s. miller
14
14.43%
1
11.11%
stephen hemminger
stephen hemminger
8
8.25%
1
11.11%
eric dumazet
eric dumazet
1
1.03%
1
11.11%
ian morris
ian morris
1
1.03%
1
11.11%
Total
97
100.00%
9
100.00%

/* Compares an address/prefix_len with addresses on device @dev.
 * If one is found it returns true.
 */


bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	const unsigned int prefix_len, struct net_device *dev)
{
	struct inet6_dev *idev;
	struct inet6_ifaddr *ifa;
	bool ret = false;

	rcu_read_lock();
	idev = __in6_dev_get(dev);
	if (idev) {
		read_lock_bh(&idev->lock);
		list_for_each_entry(ifa, &idev->addr_list, if_list) {
			ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
			if (ret)
				break;
		}
		read_unlock_bh(&idev->lock);
	}
	rcu_read_unlock();

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
catalin boie
catalin boie
103
100.00%
1
100.00%
Total
103
100.00%
1
100.00%


EXPORT_SYMBOL(ipv6_chk_custom_prefix);



int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
{
	struct inet6_dev *idev;
	struct inet6_ifaddr *ifa;
	int	onlink;

	onlink = 0;
	rcu_read_lock();
	idev = __in6_dev_get(dev);
	if (idev) {
		read_lock_bh(&idev->lock);
		list_for_each_entry(ifa, &idev->addr_list, if_list) {
			onlink = ipv6_prefix_equal(addr, &ifa->addr,
						   ifa->prefix_len);
			if (onlink)
				break;
		}
		read_unlock_bh(&idev->lock);
	}
	rcu_read_unlock();
	return onlink;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
93
91.18%
1
33.33%
stephen hemminger
stephen hemminger
8
7.84%
1
33.33%
eric dumazet
eric dumazet
1
0.98%
1
33.33%
Total
102
100.00%
3
100.00%


EXPORT_SYMBOL(ipv6_chk_prefix);



struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
				     struct net_device *dev, int strict)
{
	struct inet6_ifaddr *ifp, *result = NULL;
	unsigned int hash = inet6_addr_hash(addr);

	rcu_read_lock_bh();
	hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
		if (!net_eq(dev_net(ifp->idev->dev), net))
			continue;
		if (ipv6_addr_equal(&ifp->addr, addr)) {
			if (!dev || ifp->idev->dev == dev ||
			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
				result = ifp;
				in6_ifa_hold(ifp);
				break;
			}
		}
	}
	rcu_read_unlock_bh();

	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
89
65.44%
5
35.71%
stephen hemminger
stephen hemminger
16
11.76%
3
21.43%
daniel lezcano
daniel lezcano
15
11.03%
1
7.14%
david s. miller
david s. miller
8
5.88%
1
7.14%
ville nuorvala
ville nuorvala
5
3.68%
1
7.14%
eric dumazet
eric dumazet
2
1.47%
2
14.29%
ian morris
ian morris
1
0.74%
1
7.14%
Total
136
100.00%
14
100.00%

/* Gets referenced address, destroys ifaddr */



static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
{
	if (dad_failed)
		ifp->flags |= IFA_F_DADFAILED;

	if (ifp->flags&IFA_F_PERMANENT) {
		spin_lock_bh(&ifp->lock);
		addrconf_del_dad_work(ifp);
		ifp->flags |= IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		if (dad_failed)
			ipv6_ifa_notify(0, ifp);
		in6_ifa_put(ifp);
	} else if (ifp->flags&IFA_F_TEMPORARY) {
		struct inet6_ifaddr *ifpub;
		spin_lock_bh(&ifp->lock);
		ifpub = ifp->ifpub;
		if (ifpub) {
			in6_ifa_hold(ifpub);
			spin_unlock_bh(&ifp->lock);
			ipv6_create_tempaddr(ifpub, ifp);
			in6_ifa_put(ifpub);
		} else {
			spin_unlock_bh(&ifp->lock);
		}
		ipv6_del_addr(ifp);
	} else {
		ipv6_del_addr(ifp);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
134
82.72%
2
28.57%
herbert xu
herbert xu
11
6.79%
1
14.29%
lubomir rintel
lubomir rintel
10
6.17%
1
14.29%
brian haley
brian haley
3
1.85%
1
14.29%
hannes frederic sowa
hannes frederic sowa
3
1.85%
1
14.29%
adrian bunk
adrian bunk
1
0.62%
1
14.29%
Total
162
100.00%
7
100.00%



static int addrconf_dad_end(struct inet6_ifaddr *ifp)
{
	int err = -ENOENT;

	spin_lock_bh(&ifp->lock);
	if (ifp->state == INET6_IFADDR_STATE_DAD) {
		ifp->state = INET6_IFADDR_STATE_POSTDAD;
		err = 0;
	}
	spin_unlock_bh(&ifp->lock);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
herbert xu
herbert xu
52
92.86%
1
33.33%
hannes frederic sowa
hannes frederic sowa
4
7.14%
2
66.67%
Total
56
100.00%
3
100.00%



void addrconf_dad_failure(struct inet6_ifaddr *ifp)
{
	struct inet6_dev *idev = ifp->idev;
	struct net *net = dev_net(ifp->idev->dev);

	if (addrconf_dad_end(ifp)) {
		in6_ifa_put(ifp);
		return;
	}

	net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
			     ifp->idev->dev->name, &ifp->addr);

	spin_lock_bh(&ifp->lock);

	if (ifp->flags & IFA_F_STABLE_PRIVACY) {
		int scope = ifp->scope;
		u32 flags = ifp->flags;
		struct in6_addr new_addr;
		struct inet6_ifaddr *ifp2;
		u32 valid_lft, preferred_lft;
		int pfxlen = ifp->prefix_len;
		int retries = ifp->stable_privacy_retry + 1;

		if (retries > net->ipv6.sysctl.idgen_retries) {
			net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
					     ifp->idev->dev->name);
			goto errdad;
		}

		new_addr = ifp->addr;
		if (ipv6_generate_stable_address(&new_addr, retries,
						 idev))
			goto errdad;

		valid_lft = ifp->valid_lft;
		preferred_lft = ifp->prefered_lft;

		spin_unlock_bh(&ifp->lock);

		if (idev->cnf.max_addresses &&
		    ipv6_count_addresses(idev) >=
		    idev->cnf.max_addresses)
			goto lock_errdad;

		net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
				     ifp->idev->dev->name);

		ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen,
				     scope, flags, valid_lft,
				     preferred_lft);
		if (IS_ERR(ifp2))
			goto lock_errdad;

		spin_lock_bh(&ifp2->lock);
		ifp2->stable_privacy_retry = retries;
		ifp2->state = INET6_IFADDR_STATE_PREDAD;
		spin_unlock_bh(&ifp2->lock);

		addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay);
		in6_ifa_put(ifp2);
lock_errdad:
		spin_lock_bh(&ifp->lock);
	}

errdad:
	/* transition from _POSTDAD to _ERRDAD */
	ifp->state = INET6_IFADDR_STATE_ERRDAD;
	spin_unlock_bh(&ifp->lock);

	addrconf_mod_dad_work(ifp, 0);
	in6_ifa_put(ifp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hannes frederic sowa
hannes frederic sowa
289
82.34%
4
30.77%
hideaki yoshifuji
hideaki yoshifuji
25
7.12%
2
15.38%
brian haley
brian haley
12
3.42%
2
15.38%
ursula braun
ursula braun
7
1.99%
1
7.69%
jens rosenboom
jens rosenboom
6
1.71%
1
7.69%
herbert xu
herbert xu
6
1.71%
1
7.69%
wei yongjun
wei yongjun
5
1.42%
1
7.69%
joe perches
joe perches
1
0.28%
1
7.69%
Total
351
100.00%
13
100.00%

/* Join to solicited addr multicast group.
 * caller must hold RTNL */


void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
{
	struct in6_addr maddr;

	if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
		return;

	addrconf_addr_solict_mult(addr, &maddr);
	ipv6_dev_mc_inc(dev, &maddr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
48
97.96%
1
50.00%
eric dumazet
eric dumazet
1
2.04%
1
50.00%
Total
49
100.00%
2
100.00%

/* caller must hold RTNL */


void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
{
	struct in6_addr maddr;

	if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
		return;

	addrconf_addr_solict_mult(addr, &maddr);
	__ipv6_dev_mc_dec(idev, &maddr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
50
98.04%
2
66.67%
eric dumazet
eric dumazet
1
1.96%
1
33.33%
Total
51
100.00%
3
100.00%

/* caller must hold RTNL */


static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
{
	struct in6_addr addr;

	if (ifp->prefix_len >= 127) /* RFC 6164 */
		return;
	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
	if (ipv6_addr_any(&addr))
		return;
	__ipv6_dev_ac_inc(ifp->idev, &addr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
47
79.66%
1
20.00%
bjorn mork
bjorn mork
9
15.25%
1
20.00%
americo wang
americo wang
1
1.69%
1
20.00%
hannes frederic sowa
hannes frederic sowa
1
1.69%
1
20.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
1.69%
1
20.00%
Total
59
100.00%
5
100.00%

/* caller must hold RTNL */


static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
{
	struct in6_addr addr;

	if (ifp->prefix_len >= 127) /* RFC 6164 */
		return;
	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
	if (ipv6_addr_any(&addr))
		return;
	__ipv6_dev_ac_dec(ifp->idev, &addr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
57
96.61%
2
50.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
1.69%
1
25.00%
hannes frederic sowa
hannes frederic sowa
1
1.69%
1
25.00%
Total
59
100.00%
4
100.00%



static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != EUI64_ADDR_LEN)
		return -1;
	memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN);
	eui[0] ^= 2;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
alexander smirnov
alexander smirnov
39
81.25%
1
33.33%
hideaki yoshifuji
hideaki yoshifuji
7
14.58%
1
33.33%
alexander aring
alexander aring
2
4.17%
1
33.33%
Total
48
100.00%
3
100.00%



static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
{
	union fwnet_hwaddr *ha;

	if (dev->addr_len != FWNET_ALEN)
		return -1;

	ha = (union fwnet_hwaddr *)dev->dev_addr;

	memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
	eui[0] ^= 2;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
74
100.00%
1
100.00%
Total
74
100.00%
1
100.00%



static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
{
	/* XXX: inherit EUI-64 from other interface -- yoshfuji */
	if (dev->addr_len != ARCNET_ALEN)
		return -1;
	memset(eui, 0, 7);
	eui[7] = *(u8 *)dev->dev_addr;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
54
100.00%
3
100.00%
Total
54
100.00%
3
100.00%



static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != INFINIBAND_ALEN)
		return -1;
	memcpy(eui, dev->dev_addr + 12, 8);
	eui[0] |= 2;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
roland dreier
roland dreier
35
70.00%
1
33.33%
hideaki yoshifuji
hideaki yoshifuji
15
30.00%
2
66.67%
Total
50
100.00%
3
100.00%



static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
{
	if (addr == 0)
		return -1;
	eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
		  ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
		  ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
		  ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
		  ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
		  ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
	eui[1] = 0;
	eui[2] = 0x5E;
	eui[3] = 0xFE;
	memcpy(eui + 4, &addr, 4);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
114
91.20%
1
33.33%
sascha hlusiak
sascha hlusiak
10
8.00%
1
33.33%
stephen hemminger
stephen hemminger
1
0.80%
1
33.33%
Total
125
100.00%
3
100.00%



static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
{
	if (dev->priv_flags & IFF_ISATAP)
		return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
	return -1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%



static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
{
	return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
stephen hemminger
stephen hemminger
30
100.00%
1
100.00%
Total
30
100.00%
1
100.00%



static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
{
	memcpy(eui, dev->perm_addr, 3);
	memcpy(eui + 5, dev->perm_addr + 3, 3);
	eui[3] = 0xFF;
	eui[4] = 0xFE;
	eui[0] ^= 2;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
65
100.00%
1
100.00%
Total
65
100.00%
1
100.00%



static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
{
	switch (dev->type) {
	case ARPHRD_ETHER:
	case ARPHRD_FDDI:
		return addrconf_ifid_eui48(eui, dev);
	case ARPHRD_ARCNET:
		return addrconf_ifid_arcnet(eui, dev);
	case ARPHRD_INFINIBAND:
		return addrconf_ifid_infiniband(eui, dev);
	case ARPHRD_SIT:
		return addrconf_ifid_sit(eui, dev);
	case ARPHRD_IPGRE:
		return addrconf_ifid_gre(eui, dev);
	case ARPHRD_6LOWPAN:
		return addrconf_ifid_eui64(eui, dev);
	case ARPHRD_IEEE1394:
		return addrconf_ifid_ieee1394(eui, dev);
	case ARPHRD_TUNNEL6:
		return addrconf_ifid_ip6tnl(eui, dev);
	}
	return -1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
75
63.56%
4
44.44%
nicolas dichtel
nicolas dichtel
11
9.32%
1
11.11%
stephen hemminger
stephen hemminger
11
9.32%
1
11.11%
fred templin
fred templin
10
8.47%
1
11.11%
alexander smirnov
alexander smirnov
9
7.63%
1
11.11%
jukka rissanen
jukka rissanen
2
1.69%
1
11.11%
Total
118
100.00%
9
100.00%



static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
{
	int err = -1;
	struct inet6_ifaddr *ifp;

	read_lock_bh(&idev->lock);
	list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
		if (ifp->scope > IFA_LINK)
			break;
		if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
			memcpy(eui, ifp->addr.s6_addr+8, 8);
			err = 0;
			break;
		}
	}
	read_unlock_bh(&idev->lock);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
85
82.52%
1
25.00%
hannes frederic sowa
hannes frederic sowa
10
9.71%
1
25.00%
stephen hemminger
stephen hemminger
7
6.80%
1
25.00%
pre-git
pre-git
1
0.97%
1
25.00%
Total
103
100.00%
4
100.00%

/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */


static void __ipv6_regen_rndid(struct inet6_dev *idev)
{
regen:
	get_random_bytes(idev->rndid, sizeof(idev->rndid));
	idev->rndid[0] &= ~0x02;

	/*
         * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
         * check if generated address is not inappropriate
         *
         *  - Reserved subnet anycast (RFC 2526)
         *      11111101 11....11 1xxxxxxx
         *  - ISATAP (RFC4214) 6.1
         *      00-00-5E-FE-xx-xx-xx-xx
         *  - value 0
         *  - XXX: already assigned to an address on the device
         */
	if (idev->rndid[0] == 0xfd &&
	    (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
	    (idev->rndid[7]&0x80))
		goto regen;
	if ((idev->rndid[0]|idev->rndid[1]) == 0) {
		if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
			goto regen;
		if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
			goto regen;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
190
92.68%
3
33.33%
pre-git
pre-git
8
3.90%
2
22.22%
david s. miller
david s. miller
4
1.95%
1
11.11%
fred templin
fred templin
1
0.49%
1
11.11%
sorin dumitru
sorin dumitru
1
0.49%
1
11.11%
herbert xu
herbert xu
1
0.49%
1
11.11%
Total
205
100.00%
9
100.00%



static void ipv6_regen_rndid(unsigned long data)
{
	struct inet6_dev *idev = (struct inet6_dev *) data;
	unsigned long expires;

	rcu_read_lock_bh();
	write_lock_bh(&idev->lock);

	if (idev->dead)
		goto out;

	__ipv6_regen_rndid(idev);

	expires = jiffies +
		idev->cnf.temp_prefered_lft * HZ -
		idev->cnf.regen_max_retry * idev->cnf.dad_transmits *
		NEIGH_VAR(idev->nd_parms, RETRANS_TIME) -
		idev->cnf.max_desync_factor * HZ;
	if (time_before(expires, jiffies)) {
		pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
			__func__, idev->dev->name);
		goto out;
	}

	if (!mod_timer(&idev->regen_timer, expires))
		in6_dev_hold(idev);

out:
	write_unlock_bh(&idev->lock);
	rcu_read_unlock_bh();
	in6_dev_put(idev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
74
47.74%
3
30.00%
herbert xu
herbert xu
62
40.00%
1
10.00%
ben hutchings
ben hutchings
7
4.52%
1
10.00%
jiri pirko
jiri pirko
5
3.23%
1
10.00%
joe perches
joe perches
4
2.58%
1
10.00%
pre-git
pre-git
2
1.29%
2
20.00%
sorin dumitru
sorin dumitru
1
0.65%
1
10.00%
Total
155
100.00%
10
100.00%



static void  __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
{
	if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
		__ipv6_regen_rndid(idev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
25
56.82%
1
33.33%
pre-git
pre-git
18
40.91%
1
33.33%
sorin dumitru
sorin dumitru
1
2.27%
1
33.33%
Total
44
100.00%
3
100.00%

/*
 *      Add prefix route.
 */


static void

addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
		      unsigned long expires, u32 flags)
{
	struct fib6_config cfg = {
		.fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX,
		.fc_metric = IP6_RT_PRIO_ADDRCONF,
		.fc_ifindex = dev->ifindex,
		.fc_expires = expires,
		.fc_dst_len = plen,
		.fc_flags = RTF_UP | flags,
		.fc_nlinfo.nl_net = dev_net(dev),
		.fc_protocol = RTPROT_KERNEL,
        };

	cfg.fc_dst = *pfx;

	/* Prevent useless cloning on PtP SIT.
           This thing is done here expecting that the whole
           class of non-broadcast devices need not cloning.
         */
#if IS_ENABLED(CONFIG_IPV6_SIT)
	if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
		cfg.fc_flags |= RTF_NONEXTHOP;
#endif

	ip6_route_add(&cfg);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
72
54.96%
7
41.18%
thomas graf
thomas graf
27
20.61%
1
5.88%
benjamin thery
benjamin thery
7
5.34%
2
11.76%
joerg roedel
joerg roedel
7
5.34%
1
5.88%
david ahern
david ahern
6
4.58%
1
5.88%
stephen hemminger
stephen hemminger
5
3.82%
1
5.88%
hideaki yoshifuji
hideaki yoshifuji
3
2.29%
1
5.88%
alexey dobriyan
alexey dobriyan
2
1.53%
1
5.88%
americo wang
americo wang
1
0.76%
1
5.88%
jamal hadi salim
jamal hadi salim
1
0.76%
1
5.88%
Total
131
100.00%
17
100.00%



static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
						  int plen,
						  const struct net_device *dev,
						  u32 flags, u32 noflags)
{
	struct fib6_node *fn;
	struct rt6_info *rt = NULL;
	struct fib6_table *table;
	u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX;

	table = fib6_get_table(dev_net(dev), tb_id);
	if (!table)
		return NULL;

	read_lock_bh(&table->tb6_lock);
	fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
	if (!fn)
		goto out;

	noflags |= RTF_CACHE;
	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
		if (rt->dst.dev->ifindex != dev->ifindex)
			continue;
		if ((rt->rt6i_flags & flags) != flags)
			continue;
		if ((rt->rt6i_flags & noflags) != 0)
			continue;
		dst_hold(&rt->dst);
		break;
	}
out:
	read_unlock_bh(&table->tb6_lock);
	return rt;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
andreas hofmeister
andreas hofmeister
175
88.38%
1
14.29%
david ahern
david ahern
12
6.06%
1
14.29%
martin kafai lau
martin kafai lau
4
2.02%
1
14.29%
david s. miller
david s. miller
3
1.52%
1
14.29%
li rongqing
li rongqing
2
1.01%
1
14.29%
romain kuntz
romain kuntz
1
0.51%
1
14.29%
ian morris
ian morris
1
0.51%
1
14.29%
Total
198
100.00%
7
100.00%

/* Create "default" multicast route to the interface */



static void addrconf_add_mroute(struct net_device *dev)
{
	struct fib6_config cfg = {
		.fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL,
		.fc_metric = IP6_RT_PRIO_ADDRCONF,
		.fc_ifindex = dev->ifindex,
		.fc_dst_len = 8,
		.fc_flags = RTF_UP,
		.fc_nlinfo.nl_net = dev_net(dev),
        };

	ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);

	ip6_route_add(&cfg);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
34
40.00%
3
33.33%
thomas graf
thomas graf
34
40.00%
1
11.11%
benjamin thery
benjamin thery
7
8.24%
2
22.22%
david ahern
david ahern
6
7.06%
1
11.11%
hideaki yoshifuji
hideaki yoshifuji
4
4.71%
2
22.22%
Total
85
100.00%
9
100.00%



static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	idev = ipv6_find_idev(dev);
	if (!idev)
		return ERR_PTR(-ENOBUFS);

	if (idev->cnf.disable_ipv6)
		return ERR_PTR(-EACCES);

	/* Add default multicast route */
	if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev))
		addrconf_add_mroute(dev);

	return idev;
}

Contributors
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Tokens
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pre-git
pre-git
39
48.15%
6
60.00%
brian haley
brian haley
20
24.69%
1
10.00%
li wei
li wei
11
13.58%
1
10.00%
david ahern
david ahern
6
7.41%
1
10.00%
stephen hemminger
stephen hemminger
5
6.17%
1
10.00%
Total
81
100.00%
10
100.00%



static void manage_tempaddrs(struct inet6_dev *idev,
			     struct inet6_ifaddr *ifp,
			     __u32 valid_lft, __u32 prefered_lft,
			     bool create, unsigned long now)
{
	u32 flags;
	struct inet6_ifaddr *ift;

	read_lock_bh(&idev->lock);
	/* update all temporary addresses in the list */
	list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) {
		int age, max_valid, max_prefered;

		if (ifp != ift->ifpub)
			continue;

		/* RFC 4941 section 3.3:
                 * If a received option will extend the lifetime of a public
                 * address, the lifetimes of temporary addresses should
                 * be extended, subject to the overall constraint that no
                 * temporary addresses should ever remain "valid" or "preferred"
                 * for a time longer than (TEMP_VALID_LIFETIME) or
                 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
                 */
		age = (now - ift->cstamp) / HZ;
		max_valid = idev->cnf.temp_valid_lft - age;
		if (max_valid < 0)
			max_valid = 0;

		max_prefered = idev->cnf.temp_prefered_lft -
			       idev->cnf.max_desync_factor - age;
		if (max_prefered < 0)
			max_prefered = 0;

		if (valid_lft > max_valid)
			valid_lft = max_valid;

		if (prefered_lft > max_prefered)
			prefered_lft = max_prefered;

		spin_lock(&ift->lock);
		flags = ift->flags;
		ift->valid_lft = valid_lft;
		ift->prefered_lft = prefered_lft;
		ift->tstamp = now;
		if (prefered_lft > 0)
			ift->flags &= ~IFA_F_DEPRECATED;

		spin_unlock(&ift->lock);
		if (!(flags&IFA_F_TENTATIVE))
			ipv6_ifa_notify(0, ift);
	}

	if ((create || list_empty(&idev->tempaddr_list)) &&
	    idev->cnf.use_tempaddr > 0) {
		/* When a new public address is created as described
                 * in [ADDRCONF], also create a new temporary address.
                 * Also create a temporary address if it's enabled but
                 * no temporary address currently exists.
                 */
		read_unlock_bh(&idev->lock);
		ipv6_create_tempaddr(ifp, NULL);
	} else {
		read_unlock_bh(&idev->lock);
	}
}

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jiri pirko
jiri pirko
271
100.00%
1
100.00%
Total
271
100.00%
1
100.00%



static bool is_addr_mode_generate_stable(struct inet6_dev *idev)
{
	return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY ||
	       idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM;
}

Contributors
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bjorn mork
bjorn mork
24
100.00%
1
100.00%
Total
24
100.00%
1
100.00%



int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
				 const struct prefix_info *pinfo,
				 struct inet6_dev *in6_dev,
				 const struct in6_addr *addr, int addr_type,
				 u32 addr_flags, bool sllao, bool tokenized,
				 __u32 valid_lft, u32 prefered_lft)
{
	struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1);
	int create = 0, update_lft = 0;

	if (!ifp && valid_lft) {
		int max_addresses = in6_dev->cnf.max_addresses;

#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
		if (in6_dev->cnf.optimistic_dad &&
		    !net->ipv6.devconf_all->forwarding && sllao)
			addr_flags |= IFA_F_OPTIMISTIC;
#endif

		/* Do not allow to create too much of autoconfigured
                 * addresses; this would be too easy way to crash kernel.
                 */
		if (!max_addresses ||
		    ipv6_count_addresses(in6_dev) < max_addresses)
			ifp = ipv6_add_addr(in6_dev, addr, NULL,
					    pinfo->prefix_len,
					    addr_type&IPV6_ADDR_SCOPE_MASK,
					    addr_flags, valid_lft,
					    prefered_lft);

		if (IS_ERR_OR_NULL(ifp))
			return -1;

		update_lft = 0;
		create = 1;
		spin_lock_bh(&ifp->lock);
		ifp->flags |= IFA_F_MANAGETEMPADDR;
		ifp->cstamp = jiffies;
		ifp->tokenized = tokenized;
		spin_unlock_bh(&ifp->lock);
		addrconf_dad_start(ifp);
	}

	if (ifp) {
		u32 flags;
		unsigned long now;
		u32 stored_lft;

		/* update lifetime (RFC2462 5.5.3 e) */
		spin_lock_bh(&ifp->lock);
		now = jiffies;
		if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
			stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
		else
			stored_lft = 0;
		if (!update_lft && !create && stored_lft) {
			const u32 minimum_lft = min_t(u32,
				stored_lft, MIN_VALID_LIFETIME);
			valid_lft = max(valid_lft, minimum_lft);

			/* RFC4862 Section 5.5.3e:
                         * "Note that the preferred lifetime of the
                         *  corresponding address is always reset to
                         *  the Preferred Lifetime in the received
                         *  Prefix Information option, regardless of
                         *  whether the valid lifetime is also reset or
                         *  ignored."
                         *
                         * So we should always update prefered_lft here.
                         */
			update_lft = 1;
		}

		if (update_lft) {
			ifp->valid_lft = valid_lft;
			ifp->prefered_lft = prefered_lft;
			ifp->tstamp = now;
			flags = ifp->flags;
			ifp->flags &= ~IFA_F_DEPRECATED;
			spin_unlock_bh(&ifp->lock);

			if (!(flags&IFA_F_TENTATIVE))
				ipv6_ifa_notify(0, ifp);
		} else
			spin_unlock_bh(&ifp->lock);

		manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft,
				 create, now);

		in6_ifa_put(ifp);
		addrconf_verify();
	}

	return 0;
}
Contributors
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Tokens
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alexander aring
alexander aring
303
72.49%
1
5.00%
pre-git
pre-git
83
19.86%
10
50.00%
hideaki yoshifuji
hideaki yoshifuji
22
5.26%
4
20.00%
hannes frederic sowa
hannes frederic sowa
3
0.72%
1
5.00%
neil horman
neil horman
3
0.72%
1
5.00%
gao feng
gao feng
2
0.48%
1
5.00%
brian haley
brian haley
1
0.24%
1
5.00%
andreas hofmeister
andreas hofmeister
1
0.24%
1
5.00%
Total
418
100.00%
20
100.00%


EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr);



void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
{
	struct prefix_info *pinfo;
	__u32 valid_lft;
	__u32 prefered_lft;
	int addr_type, err;
	u32 addr_flags = 0;
	struct inet6_dev *in6_dev;
	struct net *net = dev_net(dev);

	pinfo = (struct prefix_info *) opt;

	if (len < sizeof(struct prefix_info)) {
		ADBG("addrconf: prefix option too short\n");
		return;
	}

	/*
         *      Validation checks ([ADDRCONF], page 19)
         */

	addr_type = ipv6_addr_type(&pinfo->prefix);

	if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
		return;

	valid_lft = ntohl(pinfo->valid);
	prefered_lft = ntohl(pinfo->prefered);

	if (prefered_lft > valid_lft) {
		net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
		return;
	}

	in6_dev = in6_dev_get(dev);

	if (!in6_dev) {
		net_dbg_ratelimited("addrconf: device %s not configured\n",
				    dev->name);
		return;
	}

	/*
         *      Two things going on here:
         *      1) Add routes for on-link prefixes
         *      2) Configure prefixes with the auto flag set
         */

	if (pinfo->onlink) {
		struct rt6_info *rt;
		unsigned long rt_expires;

		/* Avoid arithmetic overflow. Really, we could
                 * save rt_expires in seconds, likely valid_lft,
                 * but it would require division in fib gc, that it
                 * not good.
                 */
		if (HZ > USER_HZ)
			rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
		else
			rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);

		if (addrconf_finite_timeout(rt_expires))
			rt_expires *= HZ;

		rt = addrconf_get_prefix_route(&pinfo->prefix,
					       pinfo->prefix_len,
					       dev,
					       RTF_ADDRCONF | RTF_PREFIX_RT,
					       RTF_GATEWAY | RTF_DEFAULT);

		if (rt) {
			/* Autoconf prefix route */
			if (valid_lft == 0) {
				ip6_del_rt(rt);
				rt = NULL;
			} else if (addrconf_finite_timeout(rt_expires)) {
				/* not infinity */
				rt6_set_expires(rt, jiffies + rt_expires);
			} else {
				rt6_clean_expires(rt);
			}
		} else if (valid_lft) {
			clock_t expires = 0;
			int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
			if (addrconf_finite_timeout(rt_expires)) {
				/* not infinity */
				flags |= RTF_EXPIRES;
				expires = jiffies_to_clock_t(rt_expires);
			}
			addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
					      dev, expires, flags);
		}
		ip6_rt_put(rt);
	}

	/* Try to figure out our local address for this prefix */

	if (pinfo->autoconf && in6_dev->cnf.autoconf) {
		struct in6_addr addr;
		bool tokenized = false, dev_addr_generated = false;

		if (pinfo->prefix_len == 64) {
			memcpy(&addr, &pinfo->prefix, 8);

			if (!ipv6_addr_any(&in6_dev->token)) {
				read_lock_bh(&in6_dev->lock);
				memcpy(addr.s6_addr + 8,
				       in6_dev->token.s6_addr + 8, 8);
				read_unlock_bh(&in6_dev->lock);
				tokenized = true;
			} else if (is_addr_mode_generate_stable(in6_dev) &&
				   !ipv6_generate_stable_address(&addr, 0,
								 in6_dev)) {
				addr_flags |= IFA_F_STABLE_PRIVACY;
				goto ok;
			} else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
				   ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
				goto put;
			} else {
				dev_addr_generated = true;
			}
			goto ok;
		}
		net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
				    pinfo->prefix_len);
		goto put;

ok:
		err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev,
						   &addr, addr_type,
						   addr_flags, sllao,
						   tokenized, valid_lft,
						   prefered_lft);
		if (err)
			goto put;

		/* Ignore error case here because previous prefix add addr was
                 * successful which will be notified.
                 */
		ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr,
					      addr_type, addr_flags, sllao,
					      tokenized, valid_lft,
					      prefered_lft,
					      dev_addr_generated);
	}
	inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
put:
	in6_dev_put(in6_dev);
}

Contributors
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alexander aring
alexander aring
443
71.45%
2
8.33%
pre-git
pre-git
78
12.58%
6
25.00%
hideaki yoshifuji
hideaki yoshifuji
26
4.19%
3
12.50%
jiri pirko
jiri pirko
18
2.90%
2
8.33%
daniel borkmann
daniel borkmann
16
2.58%
2
8.33%
hannes frederic sowa
hannes frederic sowa
11
1.77%
3
12.50%
shirley ma
shirley ma
9
1.45%
1
4.17%
lorenzo colitti
lorenzo colitti
7
1.13%
1
4.17%
alexey kuznetsov
alexey kuznetsov
5
0.81%
1
4.17%
neil horman
neil horman
4
0.65%
1
4.17%
jiri benc
jiri benc
2
0.32%
1
4.17%
joe perches
joe perches
1
0.16%
1
4.17%
Total
620
100.00%
24
100.00%

/*
 *      Set destination address.
 *      Special case for SIT interfaces where we create a new "virtual"
 *      device.
 */


int addrconf_set_dstaddr(struct net *net, void __user *arg)
{
	struct in6_ifreq ireq;
	struct net_device *dev;
	int err = -EINVAL;

	rtnl_lock();

	err = -EFAULT;
	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		goto err_exit;

	dev = __dev_get_by_index(net, ireq.ifr6_ifindex);

	err = -ENODEV;
	if (!dev)
		goto err_exit;

#if IS_ENABLED(CONFIG_IPV6_SIT)
	if (dev->type == ARPHRD_SIT) {
		const struct net_device_ops *ops = dev->netdev_ops;
		struct ifreq ifr;
		struct ip_tunnel_parm p;

		err = -EADDRNOTAVAIL;
		if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
			goto err_exit;

		memset(&p, 0, sizeof(p));
		p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
		p.iph.saddr = 0;
		p.iph.version = 4;
		p.iph.ihl = 5;
		p.iph.protocol = IPPROTO_IPV6;
		p.iph.ttl = 64;
		ifr.ifr_ifru.ifru_data = (__force void __user *)&p;

		if (ops->ndo_do_ioctl) {
			mm_segment_t oldfs = get_fs();

			set_fs(KERNEL_DS);
			err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
			set_fs(oldfs);
		} else
			err = -EOPNOTSUPP;

		if (err == 0) {
			err = -ENOBUFS;
			dev = __dev_get_by_name(net, p.name);
			if (!dev)
				goto err_exit;
			err = dev_open(dev);
		}
	}
#endif

err_exit:
	rtnl_unlock();
	return err;
}

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CommitProp
pre-git
pre-git
258
82.17%
4
28.57%
stephen hemminger
stephen hemminger
31
9.87%
3
21.43%
daniel lezcano
daniel lezcano
12
3.82%
1
7.14%
joerg roedel
joerg roedel
7
2.23%
1
7.14%
eric w. biederman
eric w. biederman
2
0.64%
1
7.14%
david s. miller
david s. miller
1
0.32%
1
7.14%
ian morris
ian morris
1
0.32%
1
7.14%
al viro
al viro
1
0.32%
1
7.14%
americo wang
americo wang
1
0.32%
1
7.14%
Total
314
100.00%
14
100.00%



static int ipv6_mc_config(struct sock *sk, bool join,
			  const struct in6_addr *addr, int ifindex)
{
	int ret;

	ASSERT_RTNL();

	lock_sock(sk);
	if (join)
		ret = ipv6_sock_mc_join(sk, ifindex, addr);
	else
		ret = ipv6_sock_mc_drop(sk, ifindex, addr);
	release_sock(sk);

	return ret;
}

Contributors
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madhu challa
madhu challa
67
97.10%
1
50.00%
marcelo ricardo leitner
marcelo ricardo leitner
2
2.90%
1
50.00%
Total
69
100.00%
2
100.00%

/*
 *      Manual configuration of address on an interface
 */


static int inet6_addr_add(struct net *net, int ifindex,
			  const struct in6_addr *pfx,
			  const struct in6_addr *peer_pfx,
			  unsigned int plen, __u32 ifa_flags,
			  __u32 prefered_lft, __u32 valid_lft)
{
	struct inet6_ifaddr *ifp;
	struct inet6_dev *idev;
	struct net_device *dev;
	unsigned long timeout;
	clock_t expires;
	int scope;
	u32 flags;

	ASSERT_RTNL();

	if (plen > 128)
		return -EINVAL;

	/* check the lifetime */
	if (!valid_lft || prefered_lft > valid_lft)
		return -EINVAL;

	if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64)
		return -EINVAL;

	dev = __dev_get_by_index(net, ifindex);
	if (!dev)
		return -ENODEV;

	idev = addrconf_add_dev(dev);
	if (IS_ERR(idev))
		return PTR_ERR(idev);

	if (ifa_flags & IFA_F_MCAUTOJOIN) {
		int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk,
					 true, pfx, ifindex);

		if (ret < 0)
			return ret;
	}

	scope = ipv6_addr_scope(pfx);

	timeout = addrconf_timeout_fixup(valid_lft, HZ);
	if (addrconf_finite_timeout(timeout)) {
		expires = jiffies_to_clock_t(timeout * HZ);
		valid_lft = timeout;
		flags = RTF_EXPIRES;
	} else {
		expires = 0;
		flags = 0;
		ifa_flags |= IFA_F_PERMANENT;
	}

	timeout = addrconf_timeout_fixup(prefered_lft, HZ);
	if (addrconf_finite_timeout(timeout)) {
		if (timeout == 0)
			ifa_flags |= IFA_F_DEPRECATED;
		prefered_lft = timeout;
	}

	ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
			    valid_lft, prefered_lft);

	if (!IS_ERR(ifp)) {
		if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
			addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
					      expires, flags);
		}

		/*
                 * Note that section 3.1 of RFC 4429 indicates
                 * that the Optimistic flag should not be set for
                 * manually configured addresses
                 */
		addrconf_dad_start(ifp);
		if (ifa_flags & IFA_F_MANAGETEMPADDR)
			manage_tempaddrs(idev, ifp, valid_lft, prefered_lft,
					 true, jiffies);
		in6_ifa_put(ifp);
		addrconf_verify_rtnl();
		return 0;
	} else if (ifa_flags & IFA_F_MCAUTOJOIN) {
		ipv6_mc_config(net->ipv6.mc_autojoin_sk,
			       false, pfx, ifindex);
	}

	return PTR_ERR(ifp);
}

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hideaki yoshifuji
hideaki yoshifuji
97
24.37%
4
16.00%
pre-git
pre-git
96
24.12%
5
20.00%
madhu challa
madhu challa
66
16.58%
1
4.00%
noriaki takamiya
noriaki takamiya
42
10.55%
2
8.00%
jiri pirko
jiri pirko
38
9.55%
3
12.00%
brian haley
brian haley
11
2.76%
1
4.00%
thomas graf
thomas graf
11
2.76%
1
4.00%
daniel lezcano
daniel lezcano
11
2.76%
1
4.00%
thomas haller
thomas haller
11
2.76%
1
4.00%
nicolas dichtel
nicolas dichtel
6
1.51%
1
4.00%
jiri benc
jiri benc
4
1.01%
1
4.00%
hannes frederic sowa
hannes frederic sowa
2
0.50%
1
4.00%
eric dumazet
eric dumazet
1
0.25%
1
4.00%
neil horman
neil horman
1
0.25%
1
4.00%
eric w. biederman
eric w. biederman
1
0.25%
1
4.00%
Total
398
100.00%
25
100.00%



static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags,
			  const struct in6_addr *pfx, unsigned int plen)
{
	struct inet6_ifaddr *ifp;
	struct inet6_dev *idev;
	struct net_device *dev;

	if (plen > 128)
		return -EINVAL;

	dev = __dev_get_by_index(net, ifindex);
	if (!dev)
		return -ENODEV;

	idev = __in6_dev_get(dev);
	if (!idev)
		return -ENXIO;

	read_lock_bh(&idev->lock);
	list_for_each_entry(ifp, &idev->addr_list, if_list) {
		if (ifp->prefix_len == plen &&
		    ipv6_addr_equal(pfx, &ifp->addr)) {
			in6_ifa_hold(ifp);
			read_unlock_bh(&idev->lock);

			if (!(ifp->flags & IFA_F_TEMPORARY) &&
			    (ifa_flags & IFA_F_MANAGETEMPADDR))
				manage_tempaddrs(idev, ifp, 0, 0, false,
						 jiffies);
			ipv6_del_addr(ifp);
			addrconf_verify_rtnl();
			if (ipv6_addr_is_multicast(pfx)) {
				ipv6_mc_config(net->ipv6.mc_autojoin_sk,
					       false, pfx, dev->ifindex);
			}
			return 0;
		}
	}
	read_unlock_bh(&idev->lock);
	return -EADDRNOTAVAIL;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
116
53.21%
7
41.18%
heiner kallweit
heiner kallweit
38
17.43%
1
5.88%
madhu challa
madhu challa
26
11.93%
1
5.88%
daniel lezcano
daniel lezcano
11
5.05%
1
5.88%
thomas graf
thomas graf
11
5.05%
1
5.88%
stephen hemminger
stephen hemminger
8
3.67%
1
5.88%
ian morris
ian morris
5
2.29%
2
11.76%
hideaki yoshifuji
hideaki yoshifuji
1
0.46%
1
5.88%
eric w. biederman
eric w. biederman
1
0.46%
1
5.88%
eric dumazet
eric dumazet
1
0.46%
1
5.88%
Total
218
100.00%
17
100.00%



int addrconf_add_ifaddr(struct net *net, void __user *arg)
{
	struct in6_ifreq ireq;
	int err;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		return -EFAULT;

	rtnl_lock();
	err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
			     ireq.ifr6_prefixlen, IFA_F_PERMANENT,
			     INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
	rtnl_unlock();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
73
76.84%
2
22.22%
daniel lezcano
daniel lezcano
7
7.37%
1
11.11%
noriaki takamiya
noriaki takamiya
6
6.32%
2
22.22%
eric w. biederman
eric w. biederman
5
5.26%
1
11.11%
nicolas dichtel
nicolas dichtel
2
2.11%
1
11.11%
david s. miller
david s. miller
1
1.05%
1
11.11%
al viro
al viro
1
1.05%
1
11.11%
Total
95
100.00%
9
100.00%



int addrconf_del_ifaddr(struct net *net, void __user *arg)
{
	struct in6_ifreq ireq;
	int err;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		return -EFAULT;

	rtnl_lock();
	err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr,
			     ireq.ifr6_prefixlen);
	rtnl_unlock();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
73
82.02%
5
50.00%
daniel lezcano
daniel lezcano
7
7.87%
1
10.00%
eric w. biederman
eric w. biederman
5
5.62%
1
10.00%
heiner kallweit
heiner kallweit
2
2.25%
1
10.00%
david s. miller
david s. miller
1
1.12%
1
10.00%
al viro
al viro
1
1.12%
1
10.00%
Total
89
100.00%
10
100.00%



static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
		     int plen, int scope)
{
	struct inet6_ifaddr *ifp;

	ifp = ipv6_add_addr(idev, addr, NULL, plen,
			    scope, IFA_F_PERMANENT,
			    INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
	if (!IS_ERR(ifp)) {
		spin_lock_bh(&ifp->lock);
		ifp->flags &= ~IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		ipv6_ifa_notify(RTM_NEWADDR, ifp);
		in6_ifa_put(ifp);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ilpo jarvinen
ilpo jarvinen
88
93.62%
1
25.00%
jiri benc
jiri benc
2
2.13%
1
25.00%
hannes frederic sowa
hannes frederic sowa
2
2.13%
1
25.00%
jiri pirko
jiri pirko
2
2.13%
1
25.00%
Total
94
100.00%
4
100.00%

#if IS_ENABLED(CONFIG_IPV6_SIT)


static void sit_add_v4_addrs(struct inet6_dev *idev)
{
	struct in6_addr addr;
	struct net_device *dev;
	struct net *net = dev_net(idev->dev);
	int scope, plen;
	u32 pflags = 0;

	ASSERT_RTNL();

	memset(&addr, 0, sizeof(struct in6_addr));
	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);

	if (idev->dev->flags&IFF_POINTOPOINT) {
		addr.s6_addr32[0] = htonl(0xfe800000);
		scope = IFA_LINK;
		plen = 64;
	} else {
		scope = IPV6_ADDR_COMPATv4;
		plen = 96;
		pflags |= RTF_NONEXTHOP;
	}

	if (addr.s6_addr32[3]) {
		add_addr(idev, &addr, plen, scope);
		addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
		return;
	}

	for_each_netdev(net, dev) {
		struct in_device *in_dev = __in_dev_get_rtnl(dev);
		if (in_dev && (dev->flags & IFF_UP)) {
			struct in_ifaddr *ifa;

			int flag = scope;

			for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {

				addr.s6_addr32[3] = ifa->ifa_local;

				if (ifa->ifa_scope == RT_SCOPE_LINK)
					continue;
				if (ifa->ifa_scope >= RT_SCOPE_HOST) {
					if (idev->dev->flags&IFF_POINTOPOINT)
						continue;
					flag |= IFA_HOST;
				}

				add_addr(idev, &addr, plen, flag);
				addrconf_prefix_route(&addr, plen, idev->dev, 0,
						      pflags);
			}
		}
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
225
75.50%
6
40.00%
nicolas dichtel
nicolas dichtel
51
17.11%
2
13.33%
benjamin thery
benjamin thery
10
3.36%
1
6.67%
hideaki yoshifuji
hideaki yoshifuji
4
1.34%
2
13.33%
pavel emelianov
pavel emelianov
4
1.34%
1
6.67%
ilpo jarvinen
ilpo jarvinen
2
0.67%
1
6.67%
eric w. biederman
eric w. biederman
1
0.34%
1
6.67%
herbert xu
herbert xu
1
0.34%
1
6.67%
Total
298
100.00%
15
100.00%

#endif



static void init_loopback(struct net_device *dev)
{
	struct inet6_dev  *idev;
	struct net_device *sp_dev;
	struct inet6_ifaddr *sp_ifa;
	struct rt6_info *sp_rt;

	/* ::1 */

	ASSERT_RTNL();

	idev = ipv6_find_idev(dev);
	if (!idev) {
		pr_debug("%s: add_dev failed\n", __func__);
		return;
	}

	add_addr(idev, &in6addr_loopback, 128, IFA_HOST);

	/* Add routes to other interface's IPv6 addresses */
	for_each_netdev(dev_net(dev), sp_dev) {
		if (!strcmp(sp_dev->name, dev->name))
			continue;

		idev = __in6_dev_get(sp_dev);
		if (!idev)
			continue;

		read_lock_bh(&idev->lock);
		list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {

			if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
				continue;

			if (sp_ifa->rt) {
				/* This dst has been added to garbage list when
                                 * lo device down, release this obsolete dst and
                                 * reallocate a new router for ifa.
                                 */
				if (sp_ifa->rt->dst.obsolete > 0) {
					ip6_rt_put(sp_ifa->rt);
					sp_ifa->rt = NULL;
				} else {
					continue;
				}
			}

			sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);

			/* Failure cases are ignored */
			if (!IS_ERR(sp_rt)) {
				sp_ifa->rt = sp_rt;
				ip6_ins_rt(sp_rt);
			}
		}
		read_unlock_bh(&idev->lock);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balakumaran kannan
balakumaran kannan
118
53.39%
1
6.25%
gao feng
gao feng
48
21.72%
3
18.75%
pre-git
pre-git
43
19.46%
6
37.50%
ian morris
ian morris
5
2.26%
2
12.50%
joe perches
joe perches
4
1.81%
1
6.25%
ilpo jarvinen
ilpo jarvinen
1
0.45%
1
6.25%
hideaki yoshifuji
hideaki yoshifuji
1
0.45%
1
6.25%
francois-xavier le bail
francois-xavier le bail
1
0.45%
1
6.25%
Total
221
100.00%
16
100.00%



void addrconf_add_linklocal(struct inet6_dev *idev,
			    const struct in6_addr *addr, u32 flags)
{
	struct inet6_ifaddr *ifp;
	u32 addr_flags = flags | IFA_F_PERMANENT;

#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	if (idev->cnf.optimistic_dad &&
	    !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
		addr_flags |= IFA_F_OPTIMISTIC;
#endif

	ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
			    INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
	if (!IS_ERR(ifp)) {
		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
		addrconf_dad_start(ifp);
		in6_ifa_put(ifp);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
49
39.84%
3
21.43%
hideaki yoshifuji
hideaki yoshifuji
29
23.58%
4
28.57%
neil horman
neil horman
27
21.95%
1
7.14%
hannes frederic sowa
hannes frederic sowa
7
5.69%
2
14.29%
david s. miller
david s. miller
6
4.88%
1
7.14%
jiri pirko
jiri pirko
2
1.63%
1
7.14%
jiri benc
jiri benc
2
1.63%
1
7.14%
eric dumazet
eric dumazet
1
0.81%
1
7.14%
Total
123
100.00%
14
100.00%


EXPORT_SYMBOL_GPL(addrconf_add_linklocal);



static bool ipv6_reserved_interfaceid(struct in6_addr address)
{
	if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0)
		return true;

	if (address.s6_addr32[2] == htonl(0x02005eff) &&
	    ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
		return true;

	if (address.s6_addr32[2] == htonl(0xfdffffff) &&
	    ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
		return true;

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hannes frederic sowa
hannes frederic sowa
87
77.68%
1
25.00%
jiri pirko
jiri pirko
20
17.86%
1
25.00%
pre-git
pre-git
5
4.46%
2
50.00%
Total
112
100.00%
4
100.00%



static int ipv6_generate_stable_address(struct in6_addr *address,
					u8 dad_count,
					const struct inet6_dev *idev)
{
	static DEFINE_SPINLOCK(lock);
	static __u32 digest[SHA_DIGEST_WORDS];
	static __u32 workspace[SHA_WORKSPACE_WORDS];

	static union {
		char __data[SHA_MESSAGE_BYTES];
		struct {
			struct in6_addr secret;
			__be32 prefix[2];
			unsigned char hwaddr[MAX_ADDR_LEN];
			u8 dad_count;
		} __packed;
	} data;

	struct in6_addr secret;
	struct in6_addr temp;
	struct net *net = dev_net(idev->dev);

	BUILD_BUG_ON(sizeof(data.__data) != sizeof(data));

	if (idev->cnf.stable_secret.initialized)
		secret = idev->cnf.stable_secret.secret;
	else if (net->ipv6.devconf_dflt->stable_secret.initialized)
		secret = net->ipv6.devconf_dflt->stable_secret.secret;
	else
		return -1;

retry:
	spin_lock_bh(&lock);

	sha_init(digest);
	memset(&data, 0, sizeof(data));
	memset(workspace, 0, sizeof(workspace));
	memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len);
	data.prefix[0] = address->s6_addr32[0];
	data.prefix[1] = address->s6_addr32[1];
	data.secret = secret;
	data.dad_count = dad_count;

	sha_transform(digest, data.__data, workspace);

	temp = *address;
	temp.s6_addr32[2] = (__force __be32)digest[0];
	temp.s6_addr32[3] = (__force __be32)digest[1];

	spin_unlock_bh(&lock);

	if (ipv6_reserved_interfaceid(temp)) {
		dad_count++;
		if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries)
			return -1;
		goto retry;
	}

	*address = temp;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hannes frederic sowa
hannes frederic sowa
348
97.48%
3
42.86%
pre-git
pre-git
5
1.40%
3
42.86%
jiri pirko
jiri pirko
4
1.12%
1
14.29%
Total
357
100.00%
7
100.00%



static void ipv6_gen_mode_random_init(struct inet6_dev *idev)
{
	struct ipv6_stable_secret *s = &idev->cnf.stable_secret;

	if (s->initialized)
		return;
	s = &idev->cnf.stable_secret;
	get_random_bytes(&s->secret, sizeof(s->secret));
	s->initialized = true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
bjorn mork
bjorn mork
60
100.00%
1
100.00%
Total
60
100.00%
1
100.00%



static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
{
	struct in6_addr addr;

	/* no link local addresses on L3 master devices */