/*
* Neighbour Discovery for IPv6
- * Linux INET6 implementation
+ * Linux INET6 implementation
*
* Authors:
- * Pedro Roque <roque@di.fc.ul.pt>
+ * Pedro Roque <roque@di.fc.ul.pt>
* Mike Shaver <shaver@ingenia.com>
*
* This program is free software; you can redistribute it and/or
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)
+ int router, int solicited, int override, int inc_opt)
{
struct in6_addr tmpaddr;
struct inet6_ifaddr *ifp;
struct inet6_dev *idev;
struct flowi fl;
struct dst_entry* dst;
- struct sock *sk = ndisc_socket->sk;
+ struct sock *sk = ndisc_socket->sk;
struct in6_addr *src_addr;
- struct nd_msg *msg;
- int len;
- struct sk_buff *skb;
+ struct nd_msg *msg;
+ int len;
+ struct sk_buff *skb;
int err;
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
/* for anycast or proxy, solicited_addr != src_addr */
ifp = ipv6_get_ifaddr(solicited_addr, dev, 1);
- if (ifp) {
+ if (ifp) {
src_addr = solicited_addr;
in6_ifa_put(ifp);
} else {
if (skb == NULL) {
ND_PRINTK0(KERN_ERR
- "ICMPv6 NA: %s() failed to allocate an skb.\n",
+ "ICMPv6 NA: %s() failed to allocate an skb.\n",
__FUNCTION__);
dst_release(dst);
return;
msg = (struct nd_msg *)skb_put(skb, len);
skb->h.raw = (unsigned char*)msg;
- msg->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
- msg->icmph.icmp6_code = 0;
- msg->icmph.icmp6_cksum = 0;
+ msg->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
+ msg->icmph.icmp6_code = 0;
+ msg->icmph.icmp6_cksum = 0;
- msg->icmph.icmp6_unused = 0;
- msg->icmph.icmp6_router = router;
- msg->icmph.icmp6_solicited = solicited;
- msg->icmph.icmp6_override = override;
+ msg->icmph.icmp6_unused = 0;
+ msg->icmph.icmp6_router = router;
+ msg->icmph.icmp6_solicited = solicited;
+ msg->icmph.icmp6_override = override;
- /* Set the target address. */
+ /* Set the target address. */
ipv6_addr_copy(&msg->target, solicited_addr);
if (inc_opt)
dev->addr_len, dev->type);
/* checksum */
- msg->icmph.icmp6_cksum = csum_ipv6_magic(src_addr, daddr, len,
+ msg->icmph.icmp6_cksum = csum_ipv6_magic(src_addr, daddr, len,
IPPROTO_ICMPV6,
- csum_partial((__u8 *) msg,
+ csum_partial((__u8 *) msg,
len, 0));
skb->dst = dst;
if (likely(idev != NULL))
in6_dev_put(idev);
-}
+}
void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
struct in6_addr *solicit,
- struct in6_addr *daddr, struct in6_addr *saddr)
+ struct in6_addr *daddr, struct in6_addr *saddr)
{
struct flowi fl;
struct dst_entry* dst;
struct inet6_dev *idev;
- struct sock *sk = ndisc_socket->sk;
- struct sk_buff *skb;
- struct nd_msg *msg;
+ struct sock *sk = ndisc_socket->sk;
+ struct sk_buff *skb;
+ struct nd_msg *msg;
struct in6_addr addr_buf;
- int len;
+ int len;
int err;
int send_llinfo;
1, &err);
if (skb == NULL) {
ND_PRINTK0(KERN_ERR
- "ICMPv6 NA: %s() failed to allocate an skb.\n",
+ "ICMPv6 NA: %s() failed to allocate an skb.\n",
__FUNCTION__);
dst_release(dst);
return;
/* checksum */
msg->icmph.icmp6_cksum = csum_ipv6_magic(&skb->nh.ipv6h->saddr,
- daddr, len,
+ daddr, len,
IPPROTO_ICMPV6,
- csum_partial((__u8 *) msg,
+ csum_partial((__u8 *) msg,
len, 0));
/* send it! */
skb->dst = dst;
struct dst_entry* dst;
struct inet6_dev *idev;
struct sock *sk = ndisc_socket->sk;
- struct sk_buff *skb;
- struct icmp6hdr *hdr;
+ struct sk_buff *skb;
+ struct icmp6hdr *hdr;
__u8 * opt;
- int len;
+ int len;
int err;
ndisc_flow_init(&fl, NDISC_ROUTER_SOLICITATION, saddr, daddr,
if (dev->addr_len)
len += ndisc_opt_addr_space(dev);
- skb = sock_alloc_send_skb(sk,
+ skb = sock_alloc_send_skb(sk,
(MAX_HEADER + sizeof(struct ipv6hdr) +
len + LL_RESERVED_SPACE(dev)),
1, &err);
if (skb == NULL) {
ND_PRINTK0(KERN_ERR
- "ICMPv6 RS: %s() failed to allocate an skb.\n",
+ "ICMPv6 RS: %s() failed to allocate an skb.\n",
__FUNCTION__);
dst_release(dst);
return;
skb_reserve(skb, LL_RESERVED_SPACE(dev));
ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len);
- hdr = (struct icmp6hdr *)skb_put(skb, len);
- skb->h.raw = (unsigned char*)hdr;
- hdr->icmp6_type = NDISC_ROUTER_SOLICITATION;
- hdr->icmp6_code = 0;
- hdr->icmp6_cksum = 0;
- hdr->icmp6_unused = 0;
+ hdr = (struct icmp6hdr *)skb_put(skb, len);
+ skb->h.raw = (unsigned char*)hdr;
+ hdr->icmp6_type = NDISC_ROUTER_SOLICITATION;
+ hdr->icmp6_code = 0;
+ hdr->icmp6_cksum = 0;
+ hdr->icmp6_unused = 0;
opt = (u8*) (hdr + 1);
if (likely(idev != NULL))
in6_dev_put(idev);
}
-
+
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb)
{
int is_router;
if (ipv6_addr_is_multicast(&msg->target)) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 NS: multicast target address");
return;
}
}
if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 NS: invalid ND options\n");
return;
}
}
/* RFC2461 7.1.1:
- * If the IP source address is the unspecified address,
- * there MUST NOT be source link-layer address option
+ * If the IP source address is the unspecified address,
+ * there MUST NOT be source link-layer address option
* in the message.
*/
if (dad) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 NS: bad DAD packet (link-layer address option)\n");
return;
}
goto out;
}
}
- addrconf_dad_failure(ifp);
+ addrconf_dad_failure(ifp);
return;
}
}
if (ipv6_chk_acast_addr(dev, &msg->target) ||
- (idev->cnf.forwarding &&
+ (idev->cnf.forwarding &&
(ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
(pneigh = pneigh_lookup(&nd_tbl,
&msg->target, dev, 0)) != NULL)) {
idev->nd_parms->proxy_delay != 0) {
/*
* for anycast or proxy,
- * sender should delay its response
- * by a random time between 0 and
+ * sender should delay its response
+ * by a random time between 0 and
* MAX_ANYCAST_DELAY_TIME seconds.
* (RFC2461) -- yoshfuji
*/
else
NEIGH_CACHE_STAT_INC(&nd_tbl, rcv_probes_ucast);
- /*
+ /*
* update / create cache entry
* for the source address
*/
neigh = __neigh_lookup(&nd_tbl, saddr, dev,
!inc || lladdr || !dev->addr_len);
if (neigh)
- neigh_update(neigh, lladdr, NUD_STALE,
+ neigh_update(neigh, lladdr, NUD_STALE,
NEIGH_UPDATE_F_WEAK_OVERRIDE|
NEIGH_UPDATE_F_OVERRIDE);
if (neigh || !dev->hard_header) {
"ICMPv6 NA: solicited NA is multicasted.\n");
return;
}
-
+
if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 NS: invalid ND option\n");
static void ndisc_router_discovery(struct sk_buff *skb)
{
- struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
+ struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
struct neighbour *neigh = NULL;
struct inet6_dev *in6_dev;
struct rt6_info *rt = NULL;
return;
}
if (optlen < 0) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 RA: packet too short\n");
return;
}
rt6_mtu_change(skb->dev, mtu);
}
}
-
+
if (ndopts.nd_opts_tgt_lladdr || ndopts.nd_opts_rh) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 RA: invalid RA options");
if (ipv6_addr_equal(dest, target)) {
on_link = 1;
} else if (!(ipv6_addr_type(target) & IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: target address is not link-local.\n");
return;
}
return;
}
- /* RFC2461 8.1:
+ /* 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_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: invalid ND options\n");
ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: no link-local address on %s\n",
dev->name);
- return;
- }
+ return;
+ }
+
+ if (!ipv6_addr_equal(&skb->nh.ipv6h->daddr, target) &&
+ !(ipv6_addr_type(target) & IPV6_ADDR_LINKLOCAL)) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: target address is not link-local.\n");
+ return;
+ }
ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &skb->nh.ipv6h->saddr,
dev->ifindex);
* build redirect option and copy skb over to the new packet.
*/
- memset(opt, 0, 8);
+ memset(opt, 0, 8);
*(opt++) = ND_OPT_REDIRECT_HDR;
*(opt++) = (rd_len >> 3);
opt += 6;
}
if (msg->icmph.icmp6_code != 0) {
- ND_PRINTK2(KERN_WARNING
+ ND_PRINTK2(KERN_WARNING
"ICMPv6 NDISC: invalid ICMPv6 code: %d\n",
msg->icmph.icmp6_code);
return 0;
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,
- void **context)
+ void __user *newval, size_t newlen)
{
struct net_device *dev = ctl->extra1;
struct inet6_dev *idev;
switch (ctl->ctl_name) {
case NET_NEIGH_REACHABLE_TIME:
ret = sysctl_jiffies(ctl, name, nlen,
- oldval, oldlenp, newval, newlen,
- context);
+ oldval, oldlenp, newval, newlen);
break;
case NET_NEIGH_RETRANS_TIME_MS:
case NET_NEIGH_REACHABLE_TIME_MS:
ret = sysctl_ms_jiffies(ctl, name, nlen,
- oldval, oldlenp, newval, newlen,
- context);
+ oldval, oldlenp, newval, newlen);
break;
default:
ret = 0;
{
struct ipv6_pinfo *np;
struct sock *sk;
- int err;
+ int err;
err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &ndisc_socket);
if (err < 0) {
ND_PRINTK0(KERN_ERR
- "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n",
+ "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n",
err);
ndisc_socket = NULL; /* For safety. */
return err;
np->mc_loop = 0;
sk->sk_prot->unhash(sk);
- /*
- * Initialize the neighbour table
- */
-
+ /*
+ * Initialize the neighbour table
+ */
+
neigh_table_init(&nd_tbl);
#ifdef CONFIG_SYSCTL
- neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH,
+ neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH,
"ipv6",
&ndisc_ifinfo_sysctl_change,
&ndisc_ifinfo_sysctl_strategy);
projects / linux-drm-fsl-dcu.git / blobdiff