/**
* mipv6_mn_send_home_na - send NA when returning home
* @haddr: home address to advertise
*
* After returning home, MN must advertise all its valid addresses in
* home link to all nodes.
**/
void mipv6_mn_send_home_na(struct in6_addr *haddr)
{
struct net_device *dev = NULL;
struct in6_addr mc_allnodes;
struct mn_info *hinfo = NULL;
read_lock_bh(&mn_info_lock);
hinfo = mipv6_mn_get_info(haddr);
hinfo->is_at_home = 1;
if (!hinfo) {
read_unlock_bh(&mn_info_lock);
return;
}
dev = dev_get_by_index(hinfo->ifindex);
read_unlock_bh(&mn_info_lock);
if (dev == NULL) {
DEBUG((DBG_ERROR, "Send home_na: device not found."));
return;
}
ipv6_addr_all_nodes(&mc_allnodes);
if (ipv6_get_lladdr(dev, haddr) == 0)
ndisc_send_na(dev, NULL, &mc_allnodes, haddr, 0, 0, 1, 1);
ndisc_send_na(dev, NULL, &mc_allnodes, haddr, 0, 0, 1, 1);
dev_put(dev);
}
void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
{
struct sock *sk = igmp6_socket->sk;
struct sk_buff *skb;
struct inet6_dev *idev;
struct icmp6hdr *hdr;
struct in6_addr *snd_addr;
struct in6_addr *addrp;
struct in6_addr addr_buf;
struct in6_addr all_routers;
int err, len, payload_len, full_len;
u8 ra[8] = { IPPROTO_ICMPV6, 0,
IPV6_TLV_ROUTERALERT, 2, 0, 0,
IPV6_TLV_PADN, 0 };
#ifdef CONFIG_IPV6_MLD6_DEBUG
char abuf[128];
in6_ntop(addr, abuf);
MDBG3((KERN_DEBUG
"igmp6_send(addr=%s, dev=%p(%s), type=%d)\n",
abuf, dev, dev->name ? dev->name :"<null>", type));
#endif
snd_addr = addr;
if (type == ICMPV6_MGM_REDUCTION) {
snd_addr = &all_routers;
ipv6_addr_all_routers(&all_routers);
}
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
payload_len = len + sizeof(ra);
full_len = sizeof(struct ipv6hdr) + payload_len;
skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 0, &err);
if (skb == NULL)
return;
skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
if (dev->hard_header) {
unsigned char ha[MAX_ADDR_LEN];
ndisc_mc_map(snd_addr, ha, dev, 1);
if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
goto out;
}
if (ipv6_get_lladdr(dev, &addr_buf)) {
MDBG1((KERN_WARNING "igmp6: %s no linklocal address\n",
dev->name));
goto out;
}
ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
memset(hdr, 0, sizeof(struct icmp6hdr));
hdr->icmp6_type = type;
addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
ipv6_addr_copy(addrp, addr);
hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
IPPROTO_ICMPV6,
csum_partial((__u8 *) hdr, len, 0));
dev_queue_xmit(skb);
idev = in6_dev_get(dev);
if (type == ICMPV6_MGM_REDUCTION)
ICMP6_INC_STATS(idev,Icmp6OutGroupMembReductions);
else
ICMP6_INC_STATS(idev,Icmp6OutGroupMembResponses);
ICMP6_INC_STATS(idev,Icmp6OutMsgs);
if (idev)
in6_dev_put(idev);
return;
out:
kfree_skb(skb);
}
void igmp6_send(struct in6_addr *addr, struct device *dev, int type)
{
struct sock *sk = igmp6_socket->sk;
struct sk_buff *skb;
struct icmp6hdr *hdr;
struct inet6_ifaddr *ifp;
struct in6_addr *snd_addr;
struct in6_addr *addrp;
struct in6_addr all_routers;
int err, len, payload_len, full_len;
u8 ra[8] = { IPPROTO_ICMPV6, 0,
IPV6_TLV_ROUTERALERT, 0, 0, 0,
IPV6_TLV_PADN, 0 };
snd_addr = addr;
if (type == ICMPV6_MGM_REDUCTION) {
snd_addr = &all_routers;
ipv6_addr_all_routers(&all_routers);
}
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
payload_len = len + sizeof(ra);
full_len = sizeof(struct ipv6hdr) + payload_len;
skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 0, 0, &err);
if (skb == NULL)
return;
skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
if (dev->hard_header) {
unsigned char ha[MAX_ADDR_LEN];
ndisc_mc_map(snd_addr, ha, dev, 1);
dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len);
}
ifp = ipv6_get_lladdr(dev);
if (ifp == NULL) {
#if MCAST_DEBUG >= 1
printk(KERN_DEBUG "igmp6: %s no linklocal address\n",
dev->name);
#endif
return;
}
ip6_nd_hdr(sk, skb, dev, &ifp->addr, snd_addr, NEXTHDR_HOP, payload_len);
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
memset(hdr, 0, sizeof(struct icmp6hdr));
hdr->icmp6_type = type;
addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
ipv6_addr_copy(addrp, addr);
hdr->icmp6_cksum = csum_ipv6_magic(&ifp->addr, snd_addr, len,
IPPROTO_ICMPV6,
csum_partial((__u8 *) hdr, len, 0));
dev_queue_xmit(skb);
if (type == ICMPV6_MGM_REDUCTION)
icmpv6_statistics.Icmp6OutGroupMembReductions++;
else
icmpv6_statistics.Icmp6OutGroupMembResponses++;
icmpv6_statistics.Icmp6OutMsgs++;
}