.gc_thresh3 = 1024,
};
-/* ND options */
-struct ndisc_options {
- struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX];
-#ifdef CONFIG_IPV6_ROUTE_INFO
- struct nd_opt_hdr *nd_opts_ri;
- struct nd_opt_hdr *nd_opts_ri_end;
-#endif
- struct nd_opt_hdr *nd_useropts;
- struct nd_opt_hdr *nd_useropts_end;
-};
-
-#define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
-#define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR]
-#define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO]
-#define nd_opts_pi_end nd_opt_array[__ND_OPT_PREFIX_INFO_END]
-#define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR]
-#define nd_opts_mtu nd_opt_array[ND_OPT_MTU]
-
-#define NDISC_OPT_SPACE(len) (((len)+2+7)&~7)
-
-/*
- * Return the padding between the option length and the start of the
- * link addr. Currently only IP-over-InfiniBand needs this, although
- * if RFC 3831 IPv6-over-Fibre Channel is ever implemented it may
- * also need a pad of 2.
- */
-static int ndisc_addr_option_pad(unsigned short type)
-{
- switch (type) {
- case ARPHRD_INFINIBAND: return 2;
- default: return 0;
- }
-}
-
static inline int ndisc_opt_addr_space(struct net_device *dev)
{
return NDISC_OPT_SPACE(dev->addr_len + ndisc_addr_option_pad(dev->type));
return cur <= end && ndisc_is_useropt(cur) ? cur : NULL;
}
-static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
- struct ndisc_options *ndopts)
+struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
+ struct ndisc_options *ndopts)
{
struct nd_opt_hdr *nd_opt = (struct nd_opt_hdr *)opt;
return ndopts;
}
-static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
- struct net_device *dev)
-{
- u8 *lladdr = (u8 *)(p + 1);
- int lladdrlen = p->nd_opt_len << 3;
- int prepad = ndisc_addr_option_pad(dev->type);
- if (lladdrlen != NDISC_OPT_SPACE(dev->addr_len + prepad))
- return NULL;
- return lladdr + prepad;
-}
-
int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
{
switch (dev->type) {
static void ndisc_redirect_rcv(struct sk_buff *skb)
{
- struct inet6_dev *in6_dev;
- struct icmp6hdr *icmph;
- const struct in6_addr *dest;
- const struct in6_addr *target; /* new first hop to destination */
- struct neighbour *neigh;
- int on_link = 0;
- struct ndisc_options ndopts;
- int optlen;
- u8 *lladdr = NULL;
-
#ifdef CONFIG_IPV6_NDISC_NODETYPE
switch (skb->ndisc_nodetype) {
case NDISC_NODETYPE_HOST:
return;
}
- optlen = skb->tail - skb->transport_header;
- optlen -= sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr);
-
- if (optlen < 0) {
- ND_PRINTK(2, warn, "Redirect: packet too short\n");
- return;
- }
-
- icmph = icmp6_hdr(skb);
- target = (const struct in6_addr *) (icmph + 1);
- dest = target + 1;
-
- if (ipv6_addr_is_multicast(dest)) {
- ND_PRINTK(2, warn,
- "Redirect: destination address is multicast\n");
- return;
- }
-
- if (ipv6_addr_equal(dest, target)) {
- on_link = 1;
- } else if (ipv6_addr_type(target) !=
- (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn,
- "Redirect: target address is not link-local unicast\n");
- return;
- }
-
- in6_dev = __in6_dev_get(skb->dev);
- if (!in6_dev)
- return;
- if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects)
- return;
-
- /* RFC2461 8.1:
- * The IP source address of the Redirect MUST be the same as the current
- * first-hop router for the specified ICMP Destination Address.
- */
-
- if (!ndisc_parse_options((u8*)(dest + 1), optlen, &ndopts)) {
- ND_PRINTK(2, warn, "Redirect: invalid ND options\n");
- return;
- }
- if (ndopts.nd_opts_tgt_lladdr) {
- lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr,
- skb->dev);
- if (!lladdr) {
- ND_PRINTK(2, warn,
- "Redirect: invalid link-layer address length\n");
- return;
- }
- }
-
- neigh = __neigh_lookup(&nd_tbl, target, skb->dev, 1);
- if (neigh) {
- rt6_redirect(dest, &ipv6_hdr(skb)->daddr,
- &ipv6_hdr(skb)->saddr, neigh, lladdr,
- on_link);
- neigh_release(neigh);
- }
+ icmpv6_notify(skb, NDISC_REDIRECT, 0, 0);
}
void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
struct net *net = dev_net(dev);
struct sock *sk = net->ipv6.ndisc_sk;
int len = sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr);
+ struct inet_peer *peer;
struct sk_buff *buff;
struct icmp6hdr *icmph;
struct in6_addr saddr_buf;
int rd_len;
int err;
u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
+ bool ret;
if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n",
"Redirect: destination is not a neighbour\n");
goto release;
}
- if (!rt->rt6i_peer)
- rt6_bind_peer(rt, 1);
- if (!inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
+ peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1);
+ ret = inet_peer_xrlim_allow(peer, 1*HZ);
+ if (peer)
+ inet_putpeer(peer);
+ if (!ret)
goto release;
if (dev->addr_len) {
projects / cascardo / linux.git / blobdiff