#include <net/flow.h>
#include <net/ip6_checksum.h>
+#include <net/inet_common.h>
#include <linux/proc_fs.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
-static struct socket *ndisc_socket;
-
static u32 ndisc_hash(const void *pkey, const struct net_device *dev);
static int ndisc_constructor(struct neighbour *neigh);
static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb);
if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
ND_PRINTK2(KERN_WARNING
"%s(): duplicated ND6 option found: type=%d\n",
- __FUNCTION__,
+ __func__,
nd_opt->nd_opt_type);
} else {
ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt;
*/
ND_PRINTK2(KERN_NOTICE
"%s(): ignored unsupported option; type=%d, len=%d\n",
- __FUNCTION__,
+ __func__,
nd_opt->nd_opt_type, nd_opt->nd_opt_len);
}
}
*/
static void __ndisc_send(struct net_device *dev,
struct neighbour *neigh,
- struct in6_addr *daddr, struct in6_addr *saddr,
- struct icmp6hdr *icmp6h, struct in6_addr *target,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h, const struct in6_addr *target,
int llinfo)
{
struct flowi fl;
struct dst_entry *dst;
- struct sock *sk = ndisc_socket->sk;
+ struct net *net = dev_net(dev);
+ struct sock *sk = net->ipv6.ndisc_sk;
struct sk_buff *skb;
struct icmp6hdr *hdr;
struct inet6_dev *idev;
type = icmp6h->icmp6_type;
- icmpv6_flow_init(ndisc_socket->sk, &fl, type,
- saddr, daddr, dev->ifindex);
+ icmpv6_flow_init(sk, &fl, type, saddr, daddr, dev->ifindex);
dst = icmp6_dst_alloc(dev, neigh, daddr);
if (!dst)
skb = sock_alloc_send_skb(sk,
(MAX_HEADER + sizeof(struct ipv6hdr) +
- len + LL_RESERVED_SPACE(dev)),
+ len + LL_ALLOCATED_SPACE(dev)),
1, &err);
if (!skb) {
ND_PRINTK0(KERN_ERR
"ICMPv6 ND: %s() failed to allocate an skb.\n",
- __FUNCTION__);
+ __func__);
dst_release(dst);
return;
}
}
static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
- struct in6_addr *daddr, struct in6_addr *solicited_addr,
- int router, int solicited, int override, int inc_opt)
+ const struct in6_addr *daddr,
+ const struct in6_addr *solicited_addr,
+ int router, int solicited, int override, int inc_opt)
{
struct in6_addr tmpaddr;
struct inet6_ifaddr *ifp;
- struct in6_addr *src_addr;
+ const struct in6_addr *src_addr;
struct icmp6hdr icmp6h = {
.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT,
};
/* for anycast or proxy, solicited_addr != src_addr */
- ifp = ipv6_get_ifaddr(&init_net, solicited_addr, dev, 1);
+ ifp = ipv6_get_ifaddr(dev_net(dev), solicited_addr, dev, 1);
if (ifp) {
src_addr = solicited_addr;
if (ifp->flags & IFA_F_OPTIMISTIC)
override = 0;
in6_ifa_put(ifp);
} else {
- if (ipv6_dev_get_saddr(dev, daddr, &tmpaddr))
+ if (ipv6_dev_get_saddr(dev, daddr,
+ inet6_sk(dev_net(dev)->ipv6.ndisc_sk)->srcprefs,
+ &tmpaddr))
return;
src_addr = &tmpaddr;
}
}
void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
- struct in6_addr *solicit,
- struct in6_addr *daddr, struct in6_addr *saddr)
+ const struct in6_addr *solicit,
+ const struct in6_addr *daddr, const struct in6_addr *saddr)
{
struct in6_addr addr_buf;
struct icmp6hdr icmp6h = {
!ipv6_addr_any(saddr) ? ND_OPT_SOURCE_LL_ADDR : 0);
}
-void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr,
- struct in6_addr *daddr)
+void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
+ const struct in6_addr *daddr)
{
struct icmp6hdr icmp6h = {
.icmp6_type = NDISC_ROUTER_SOLICITATION,
* suppress the inclusion of the sllao.
*/
if (send_sllao) {
- struct inet6_ifaddr *ifp = ipv6_get_ifaddr(&init_net, saddr,
+ struct inet6_ifaddr *ifp = ipv6_get_ifaddr(dev_net(dev), saddr,
dev, 1);
if (ifp) {
if (ifp->flags & IFA_F_OPTIMISTIC) {
struct in6_addr *target = (struct in6_addr *)&neigh->primary_key;
int probes = atomic_read(&neigh->probes);
- if (skb && ipv6_chk_addr(&init_net, &ipv6_hdr(skb)->saddr, dev, 1))
+ if (skb && ipv6_chk_addr(dev_net(dev), &ipv6_hdr(skb)->saddr, dev, 1))
saddr = &ipv6_hdr(skb)->saddr;
if ((probes -= neigh->parms->ucast_probes) < 0) {
ND_PRINTK1(KERN_DEBUG
"%s(): trying to ucast probe in NUD_INVALID: "
NIP6_FMT "\n",
- __FUNCTION__,
+ __func__,
NIP6(*target));
}
ndisc_send_ns(dev, neigh, target, target, saddr);
}
}
+static int pndisc_is_router(const void *pkey,
+ struct net_device *dev)
+{
+ struct pneigh_entry *n;
+ int ret = -1;
+
+ read_lock_bh(&nd_tbl.lock);
+ n = __pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev);
+ if (n)
+ ret = !!(n->flags & NTF_ROUTER);
+ read_unlock_bh(&nd_tbl.lock);
+
+ return ret;
+}
+
static void ndisc_recv_ns(struct sk_buff *skb)
{
struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
struct inet6_ifaddr *ifp;
struct inet6_dev *idev = NULL;
struct neighbour *neigh;
- struct pneigh_entry *pneigh = NULL;
int dad = ipv6_addr_any(saddr);
int inc;
- int is_router;
+ int is_router = -1;
if (ipv6_addr_is_multicast(&msg->target)) {
ND_PRINTK2(KERN_WARNING
inc = ipv6_addr_is_multicast(daddr);
- if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1)) != NULL) {
+ ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
+ if (ifp) {
if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) {
if (dad) {
return;
}
- if (ipv6_chk_acast_addr(dev, &msg->target) ||
+ if (ipv6_chk_acast_addr(dev_net(dev), dev, &msg->target) ||
(idev->cnf.forwarding &&
(ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
- (pneigh = pneigh_lookup(&nd_tbl, &init_net,
- &msg->target, dev, 0)) != NULL)) {
+ (is_router = pndisc_is_router(&msg->target, dev)) >= 0)) {
if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
skb->pkt_type != PACKET_HOST &&
inc != 0 &&
goto out;
}
- is_router = !!(pneigh ? pneigh->flags & NTF_ROUTER : idev->cnf.forwarding);
+ if (is_router < 0)
+ is_router = !!idev->cnf.forwarding;
if (dad) {
- struct in6_addr maddr;
-
- ipv6_addr_all_nodes(&maddr);
- ndisc_send_na(dev, NULL, &maddr, &msg->target,
+ ndisc_send_na(dev, NULL, &in6addr_linklocal_allnodes, &msg->target,
is_router, 0, (ifp != NULL), 1);
goto out;
}
return;
}
}
- if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1))) {
+ ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
+ if (ifp) {
if (ifp->flags & IFA_F_TENTATIVE) {
addrconf_dad_failure(ifp);
return;
*/
if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) &&
ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp &&
- pneigh_lookup(&nd_tbl, &init_net, &msg->target, dev, 0)) {
+ pneigh_lookup(&nd_tbl, dev_net(dev), &msg->target, dev, 0)) {
/* XXX: idev->cnf.prixy_ndp */
goto out;
}
struct sk_buff *skb;
struct nlmsghdr *nlh;
struct nduseroptmsg *ndmsg;
+ struct net *net = dev_net(ra->dev);
int err;
int base_size = NLMSG_ALIGN(sizeof(struct nduseroptmsg)
+ (opt->nd_opt_len << 3));
&ipv6_hdr(ra)->saddr);
nlmsg_end(skb, nlh);
- err = rtnl_notify(skb, &init_net, 0, RTNLGRP_ND_USEROPT, NULL,
+ err = rtnl_notify(skb, net, 0, RTNLGRP_ND_USEROPT, NULL,
GFP_ATOMIC);
if (err < 0)
goto errout;
nlmsg_free(skb);
err = -EMSGSIZE;
errout:
- rtnl_set_sk_err(&init_net, RTNLGRP_ND_USEROPT, err);
+ rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err);
}
static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 RA: from host or unauthorized router\n");
+ return;
+ }
+#endif
+
/*
* set the RA_RECV flag in the interface
*/
return;
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ /* skip link-specific parameters from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto skip_linkparms;
+#endif
+
if (in6_dev->if_flags & IF_RS_SENT) {
/*
* flag that an RA was received after an RS was sent
if (rt == NULL) {
ND_PRINTK0(KERN_ERR
"ICMPv6 RA: %s() failed to add default route.\n",
- __FUNCTION__);
+ __func__);
in6_dev_put(in6_dev);
return;
}
if (neigh == NULL) {
ND_PRINTK0(KERN_ERR
"ICMPv6 RA: %s() got default router without neighbour.\n",
- __FUNCTION__);
+ __func__);
dst_release(&rt->u.dst);
in6_dev_put(in6_dev);
return;
}
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+skip_linkparms:
+#endif
+
/*
* Process options.
*/
for (p = ndopts.nd_opts_ri;
p;
p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) {
- if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
+ struct route_info *ri = (struct route_info *)p;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT &&
+ ri->prefix_len == 0)
+ continue;
+#endif
+ if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
&ipv6_hdr(skb)->saddr);
}
#endif
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ /* skip link-specific ndopts from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto out;
+#endif
+
if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {
struct nd_opt_hdr *p;
for (p = ndopts.nd_opts_pi;
int optlen;
u8 *lladdr = NULL;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ switch (skb->ndisc_nodetype) {
+ case NDISC_NODETYPE_HOST:
+ case NDISC_NODETYPE_NODEFAULT:
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: from host or unauthorized router\n");
+ return;
+ }
+#endif
+
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: source address is not link-local.\n");
}
void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
- struct in6_addr *target)
+ const struct in6_addr *target)
{
- struct sock *sk = ndisc_socket->sk;
+ struct net_device *dev = skb->dev;
+ struct net *net = dev_net(dev);
+ struct sock *sk = net->ipv6.ndisc_sk;
int len = sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr);
struct sk_buff *buff;
struct icmp6hdr *icmph;
struct in6_addr saddr_buf;
struct in6_addr *addrp;
- struct net_device *dev;
struct rt6_info *rt;
struct dst_entry *dst;
struct inet6_dev *idev;
u8 *opt;
int rd_len;
int err;
- int hlen;
u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
- dev = skb->dev;
-
if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: no link-local address on %s\n",
return;
}
- icmpv6_flow_init(ndisc_socket->sk, &fl, NDISC_REDIRECT,
+ icmpv6_flow_init(sk, &fl, NDISC_REDIRECT,
&saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex);
- dst = ip6_route_output(&init_net, NULL, &fl);
+ dst = ip6_route_output(net, NULL, &fl);
if (dst == NULL)
return;
buff = sock_alloc_send_skb(sk,
(MAX_HEADER + sizeof(struct ipv6hdr) +
- len + LL_RESERVED_SPACE(dev)),
+ len + LL_ALLOCATED_SPACE(dev)),
1, &err);
if (buff == NULL) {
ND_PRINTK0(KERN_ERR
"ICMPv6 Redirect: %s() failed to allocate an skb.\n",
- __FUNCTION__);
+ __func__);
dst_release(dst);
return;
}
- hlen = 0;
-
skb_reserve(buff, LL_RESERVED_SPACE(dev));
ip6_nd_hdr(sk, buff, dev, &saddr_buf, &ipv6_hdr(skb)->saddr,
IPPROTO_ICMPV6, len);
static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
- struct net *net = dev->nd_net;
-
- if (dev->nd_net != &init_net)
- return NOTIFY_DONE;
+ struct net *net = dev_net(dev);
switch (event) {
case NETDEV_CHANGEADDR:
return ret;
}
-static int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
- int nlen, void __user *oldval,
- size_t __user *oldlenp,
- void __user *newval, size_t newlen)
+int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
+ int nlen, void __user *oldval,
+ size_t __user *oldlenp,
+ void __user *newval, size_t newlen)
{
struct net_device *dev = ctl->extra1;
struct inet6_dev *idev;
#endif
-int __init ndisc_init(void)
+static int ndisc_net_init(struct net *net)
{
struct ipv6_pinfo *np;
struct sock *sk;
int err;
- err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &ndisc_socket);
+ err = inet_ctl_sock_create(&sk, PF_INET6,
+ SOCK_RAW, IPPROTO_ICMPV6, net);
if (err < 0) {
ND_PRINTK0(KERN_ERR
"ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n",
err);
- ndisc_socket = NULL; /* For safety. */
return err;
}
- sk = ndisc_socket->sk;
+ net->ipv6.ndisc_sk = sk;
+
np = inet6_sk(sk);
- sk->sk_allocation = GFP_ATOMIC;
np->hop_limit = 255;
/* Do not loopback ndisc messages */
np->mc_loop = 0;
- sk->sk_prot->unhash(sk);
+ return 0;
+}
+
+static void ndisc_net_exit(struct net *net)
+{
+ inet_ctl_sock_destroy(net->ipv6.ndisc_sk);
+}
+
+static struct pernet_operations ndisc_net_ops = {
+ .init = ndisc_net_init,
+ .exit = ndisc_net_exit,
+};
+
+int __init ndisc_init(void)
+{
+ int err;
+
+ err = register_pernet_subsys(&ndisc_net_ops);
+ if (err)
+ return err;
/*
* Initialize the neighbour table
*/
-
neigh_table_init(&nd_tbl);
#ifdef CONFIG_SYSCTL
- neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH,
- "ipv6",
- &ndisc_ifinfo_sysctl_change,
- &ndisc_ifinfo_sysctl_strategy);
+ err = neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6,
+ NET_IPV6_NEIGH, "ipv6",
+ &ndisc_ifinfo_sysctl_change,
+ &ndisc_ifinfo_sysctl_strategy);
+ if (err)
+ goto out_unregister_pernet;
#endif
+ err = register_netdevice_notifier(&ndisc_netdev_notifier);
+ if (err)
+ goto out_unregister_sysctl;
+out:
+ return err;
- register_netdevice_notifier(&ndisc_netdev_notifier);
- return 0;
+out_unregister_sysctl:
+#ifdef CONFIG_SYSCTL
+ neigh_sysctl_unregister(&nd_tbl.parms);
+out_unregister_pernet:
+#endif
+ unregister_pernet_subsys(&ndisc_net_ops);
+ goto out;
}
void ndisc_cleanup(void)
neigh_sysctl_unregister(&nd_tbl.parms);
#endif
neigh_table_clear(&nd_tbl);
- sock_release(ndisc_socket);
- ndisc_socket = NULL; /* For safety. */
+ unregister_pernet_subsys(&ndisc_net_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff