#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/slab.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/icmpv6.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <linux/skbuff.h>
#include <linux/compat.h>
#include <linux/uaccess.h>
#include <asm/ioctls.h>
#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/ip6_route.h>
#include <net/ip6_checksum.h>
#include <net/addrconf.h>
#include <net/transp_v6.h>
#include <net/udp.h>
#include <net/inet_common.h>
#include <net/tcp_states.h>
#if IS_ENABLED(CONFIG_IPV6_MIP6)
#include <net/mip6.h>
#endif
#include <linux/mroute6.h>
#include <net/raw.h>
#include <net/rawv6.h>
#include <net/xfrm.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.h>
#define ICMPV6_HDRLEN 4
struct raw_hashinfo raw_v6_hashinfo;
EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
bool raw_v6_match(struct net *net, const struct sock *sk, unsigned short num,
const struct in6_addr *loc_addr,
const struct in6_addr *rmt_addr, int dif, int sdif)
{
if (inet_sk(sk)->inet_num != num ||
!net_eq(sock_net(sk), net) ||
(!ipv6_addr_any(&sk->sk_v6_daddr) &&
!ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) ||
!raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if,
dif, sdif))
return false;
if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) ||
ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr) ||
(ipv6_addr_is_multicast(loc_addr) &&
inet6_mc_check(sk, loc_addr, rmt_addr)))
return true;
return false;
}
EXPORT_SYMBOL_GPL(raw_v6_match);
static int icmpv6_filter(const struct sock *sk, struct sk_buff *skb)
{
const struct icmp6hdr *hdr;
const __u32 *data;
unsigned int type;
if (!pskb_may_pull(skb, ICMPV6_HDRLEN))
return 1;
hdr = (struct icmp6hdr *)skb->data;
type = hdr->icmp6_type;
data = &raw6_sk(sk)->filter.data[0];
return (data[type >> 5] & (1U << (type & 31))) != 0;
}
#if IS_ENABLED(CONFIG_IPV6_MIP6)
typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
static mh_filter_t __rcu *mh_filter __read_mostly;
int rawv6_mh_filter_register(mh_filter_t filter)
{
rcu_assign_pointer(mh_filter, filter);
return 0;
}
EXPORT_SYMBOL(rawv6_mh_filter_register);
int rawv6_mh_filter_unregister(mh_filter_t filter)
{
RCU_INIT_POINTER(mh_filter, NULL);
synchronize_rcu();
return 0;
}
EXPORT_SYMBOL(rawv6_mh_filter_unregister);
#endif
static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
{
struct net *net = dev_net(skb->dev);
const struct ipv6hdr *ip6h;
struct hlist_head *hlist;
bool delivered = false;
struct sock *sk;
__u8 hash;
ip6h = ipv6_hdr(skb);
hash = raw_hashfunc(net, nexthdr);
hlist = &raw_v6_hashinfo.ht[hash];
rcu_read_lock();
sk_for_each_rcu(sk, hlist) {
int filtered;
if (!raw_v6_match(net, sk, nexthdr, &ip6h->daddr, &ip6h->saddr,
inet6_iif(skb), inet6_sdif(skb)))
continue;
if (atomic_read(&sk->sk_rmem_alloc) >=
READ_ONCE(sk->sk_rcvbuf)) {
sk_drops_inc(sk);
continue;
}
delivered = true;
switch (nexthdr) {
case IPPROTO_ICMPV6:
filtered = icmpv6_filter(sk, skb);
ip6h = ipv6_hdr(skb);
break;
#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPPROTO_MH:
{
mh_filter_t *filter;
filter = rcu_dereference(mh_filter);
filtered = filter ? (*filter)(sk, skb) : 0;
break;
}
#endif
default:
filtered = 0;
break;
}
if (filtered < 0)
break;
if (filtered == 0) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
if (clone)
rawv6_rcv(sk, clone);
}
}
rcu_read_unlock();
return delivered;
}
bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
{
return ipv6_raw_deliver(skb, nexthdr);
}
static int rawv6_bind(struct sock *sk, struct sockaddr_unsized *uaddr,
int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
__be32 v4addr = 0;
int addr_type;
int err;
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
if (addr->sin6_family != AF_INET6)
return -EINVAL;
addr_type = ipv6_addr_type(&addr->sin6_addr);
if (addr_type == IPV6_ADDR_MAPPED)
return -EADDRNOTAVAIL;
lock_sock(sk);
err = -EINVAL;
if (sk->sk_state != TCP_CLOSE)
goto out;
rcu_read_lock();
if (addr_type != IPV6_ADDR_ANY) {
struct net_device *dev = NULL;
if (__ipv6_addr_needs_scope_id(addr_type)) {
if (addr_len >= sizeof(struct sockaddr_in6) &&
addr->sin6_scope_id) {
sk->sk_bound_dev_if = addr->sin6_scope_id;
}
if (!sk->sk_bound_dev_if)
goto out_unlock;
}
if (sk->sk_bound_dev_if) {
err = -ENODEV;
dev = dev_get_by_index_rcu(sock_net(sk),
sk->sk_bound_dev_if);
if (!dev)
goto out_unlock;
}
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST) &&
!ipv6_can_nonlocal_bind(sock_net(sk), inet)) {
err = -EADDRNOTAVAIL;
if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
dev, 0)) {
goto out_unlock;
}
}
}
inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
sk->sk_v6_rcv_saddr = addr->sin6_addr;
if (!(addr_type & IPV6_ADDR_MULTICAST))
np->saddr = addr->sin6_addr;
err = 0;
out_unlock:
rcu_read_unlock();
out:
release_sock(sk);
return err;
}
static void rawv6_err(struct sock *sk, struct sk_buff *skb,
u8 type, u8 code, int offset, __be32 info)
{
bool recverr = inet6_test_bit(RECVERR6, sk);
struct ipv6_pinfo *np = inet6_sk(sk);
int err;
int harderr;
if (!recverr && sk->sk_state != TCP_ESTABLISHED)
return;
harderr = icmpv6_err_convert(type, code, &err);
if (type == ICMPV6_PKT_TOOBIG) {
ip6_sk_update_pmtu(skb, sk, info);
harderr = (READ_ONCE(np->pmtudisc) == IPV6_PMTUDISC_DO);
}
if (type == NDISC_REDIRECT) {
ip6_sk_redirect(skb, sk);
return;
}
if (recverr) {
u8 *payload = skb->data;
if (!inet_test_bit(HDRINCL, sk))
payload += offset;
ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
}
if (recverr || harderr) {
sk->sk_err = err;
sk_error_report(sk);
}
}
void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
u8 type, u8 code, int inner_offset, __be32 info)
{
struct net *net = dev_net(skb->dev);
struct hlist_head *hlist;
struct sock *sk;
int hash;
hash = raw_hashfunc(net, nexthdr);
hlist = &raw_v6_hashinfo.ht[hash];
rcu_read_lock();
sk_for_each_rcu(sk, hlist) {
const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
if (!raw_v6_match(net, sk, nexthdr, &ip6h->saddr, &ip6h->daddr,
inet6_iif(skb), inet6_iif(skb)))
continue;
rawv6_err(sk, skb, type, code, inner_offset, info);
}
rcu_read_unlock();
}
static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
enum skb_drop_reason reason;
if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
skb_checksum_complete(skb)) {
sk_drops_inc(sk);
sk_skb_reason_drop(sk, skb, SKB_DROP_REASON_SKB_CSUM);
return NET_RX_DROP;
}
skb_dst_drop(skb);
if (sock_queue_rcv_skb_reason(sk, skb, &reason) < 0) {
sk_skb_reason_drop(sk, skb, reason);
return NET_RX_DROP;
}
return 0;
}
int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
{
struct inet_sock *inet = inet_sk(sk);
struct raw6_sock *rp = raw6_sk(sk);
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
sk_drops_inc(sk);
sk_skb_reason_drop(sk, skb, SKB_DROP_REASON_XFRM_POLICY);
return NET_RX_DROP;
}
nf_reset_ct(skb);
if (!rp->checksum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (skb->ip_summed == CHECKSUM_COMPLETE) {
skb_postpull_rcsum(skb, skb_network_header(skb),
skb_network_header_len(skb));
if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len, inet->inet_num, skb->csum))
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
if (!skb_csum_unnecessary(skb))
skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len,
inet->inet_num, 0));
if (inet_test_bit(HDRINCL, sk)) {
if (skb_checksum_complete(skb)) {
sk_drops_inc(sk);
sk_skb_reason_drop(sk, skb, SKB_DROP_REASON_SKB_CSUM);
return NET_RX_DROP;
}
}
rawv6_rcv_skb(sk, skb);
return 0;
}
static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int flags, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
struct sk_buff *skb;
size_t copied;
int err;
if (flags & MSG_OOB)
return -EOPNOTSUPP;
if (flags & MSG_ERRQUEUE)
return ipv6_recv_error(sk, msg, len, addr_len);
if (np->rxopt.bits.rxpmtu && READ_ONCE(np->rxpmtu))
return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
if (skb_csum_unnecessary(skb)) {
err = skb_copy_datagram_msg(skb, 0, msg, copied);
} else if (msg->msg_flags&MSG_TRUNC) {
if (__skb_checksum_complete(skb))
goto csum_copy_err;
err = skb_copy_datagram_msg(skb, 0, msg, copied);
} else {
err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
if (err == -EINVAL)
goto csum_copy_err;
}
if (err)
goto out_free;
if (sin6) {
sin6->sin6_family = AF_INET6;
sin6->sin6_port = 0;
sin6->sin6_addr = ipv6_hdr(skb)->saddr;
sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
inet6_iif(skb));
*addr_len = sizeof(*sin6);
}
sock_recv_cmsgs(msg, sk, skb);
if (np->rxopt.all)
ip6_datagram_recv_ctl(sk, msg, skb);
err = copied;
if (flags & MSG_TRUNC)
err = skb->len;
out_free:
skb_free_datagram(sk, skb);
out:
return err;
csum_copy_err:
skb_kill_datagram(sk, skb, flags);
err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
goto out;
}
static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
struct raw6_sock *rp)
{
struct ipv6_txoptions *opt;
struct sk_buff *skb;
int err = 0;
int offset;
int len;
int total_len;
__wsum tmp_csum;
__sum16 csum;
if (!rp->checksum)
goto send;
skb = skb_peek(&sk->sk_write_queue);
if (!skb)
goto out;
offset = rp->offset;
total_len = inet_sk(sk)->cork.base.length;
opt = inet_sk(sk)->cork.base6.opt;
total_len -= opt ? opt->opt_flen : 0;
if (offset >= total_len - 1) {
err = -EINVAL;
ip6_flush_pending_frames(sk);
goto out;
}
if (skb_queue_len(&sk->sk_write_queue) == 1) {
tmp_csum = skb->csum;
} else {
struct sk_buff *csum_skb = NULL;
tmp_csum = 0;
skb_queue_walk(&sk->sk_write_queue, skb) {
tmp_csum = csum_add(tmp_csum, skb->csum);
if (csum_skb)
continue;
len = skb->len - skb_transport_offset(skb);
if (offset >= len) {
offset -= len;
continue;
}
csum_skb = skb;
}
skb = csum_skb;
}
offset += skb_transport_offset(skb);
err = skb_copy_bits(skb, offset, &csum, 2);
if (err < 0) {
ip6_flush_pending_frames(sk);
goto out;
}
if (unlikely(csum))
tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
total_len, fl6->flowi6_proto, tmp_csum);
if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
csum = CSUM_MANGLED_0;
BUG_ON(skb_store_bits(skb, offset, &csum, 2));
send:
err = ip6_push_pending_frames(sk);
out:
return err;
}
static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
struct flowi6 *fl6, struct dst_entry **dstp,
unsigned int flags, const struct sockcm_cookie *sockc)
{
struct net *net = sock_net(sk);
struct ipv6hdr *iph;
struct sk_buff *skb;
int err;
struct rt6_info *rt = dst_rt6_info(*dstp);
int hlen = LL_RESERVED_SPACE(rt->dst.dev);
int tlen = rt->dst.dev->needed_tailroom;
if (length > rt->dst.dev->mtu) {
ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
return -EMSGSIZE;
}
if (length < sizeof(struct ipv6hdr))
return -EINVAL;
if (flags&MSG_PROBE)
goto out;
skb = sock_alloc_send_skb(sk,
length + hlen + tlen + 15,
flags & MSG_DONTWAIT, &err);
if (!skb)
goto error;
skb_reserve(skb, hlen);
skb->protocol = htons(ETH_P_IPV6);
skb->priority = sockc->priority;
skb->mark = sockc->mark;
skb_set_delivery_type_by_clockid(skb, sockc->transmit_time, sk->sk_clockid);
skb_put(skb, length);
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
skb->ip_summed = CHECKSUM_NONE;
skb_setup_tx_timestamp(skb, sockc);
if (flags & MSG_CONFIRM)
skb_set_dst_pending_confirm(skb, 1);
skb->transport_header = skb->network_header;
err = memcpy_from_msg(iph, msg, length);
if (err) {
err = -EFAULT;
kfree_skb(skb);
goto error;
}
skb_dst_set(skb, &rt->dst);
*dstp = NULL;
skb = l3mdev_ip6_out(sk, skb);
if (unlikely(!skb))
return 0;
rcu_read_lock();
IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
NULL, rt->dst.dev, dst_output);
if (err > 0)
err = net_xmit_errno(err);
if (err) {
IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
rcu_read_unlock();
goto error_check;
}
rcu_read_unlock();
out:
return 0;
error:
IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
error_check:
if (err == -ENOBUFS && !inet6_test_bit(RECVERR6, sk))
err = 0;
return err;
}
struct raw6_frag_vec {
struct msghdr *msg;
int hlen;
char c[4];
};
static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
{
int err = 0;
switch (fl6->flowi6_proto) {
case IPPROTO_ICMPV6:
rfv->hlen = 2;
err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
if (!err) {
fl6->fl6_icmp_type = rfv->c[0];
fl6->fl6_icmp_code = rfv->c[1];
}
break;
case IPPROTO_MH:
rfv->hlen = 4;
err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
if (!err)
fl6->fl6_mh_type = rfv->c[2];
}
return err;
}
static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
struct sk_buff *skb)
{
struct raw6_frag_vec *rfv = from;
if (offset < rfv->hlen) {
int copy = min(rfv->hlen - offset, len);
if (skb->ip_summed == CHECKSUM_PARTIAL)
memcpy(to, rfv->c + offset, copy);
else
skb->csum = csum_block_add(
skb->csum,
csum_partial_copy_nocheck(rfv->c + offset,
to, copy),
odd);
odd = 0;
offset += copy;
to += copy;
len -= copy;
if (!len)
return 0;
}
offset -= rfv->hlen;
return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
}
static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
{
struct ipv6_txoptions *opt_to_free = NULL;
struct ipv6_txoptions opt_space;
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
struct in6_addr *daddr, *final_p, final;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct raw6_sock *rp = raw6_sk(sk);
struct ipv6_txoptions *opt = NULL;
struct ip6_flowlabel *flowlabel = NULL;
struct dst_entry *dst = NULL;
struct raw6_frag_vec rfv;
struct flowi6 fl6;
struct ipcm6_cookie ipc6;
int addr_len = msg->msg_namelen;
int hdrincl;
u16 proto;
int err;
if (len > INT_MAX)
return -EMSGSIZE;
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
hdrincl = inet_test_bit(HDRINCL, sk);
ipcm6_init_sk(&ipc6, sk);
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_mark = ipc6.sockc.mark;
fl6.flowi6_uid = sk_uid(sk);
if (sin6) {
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
proto = ntohs(sin6->sin6_port);
if (!proto)
proto = inet->inet_num;
else if (proto != inet->inet_num &&
inet->inet_num != IPPROTO_RAW)
return -EINVAL;
if (proto > 255)
return -EINVAL;
daddr = &sin6->sin6_addr;
if (inet6_test_bit(SNDFLOW, sk)) {
fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
if (IS_ERR(flowlabel))
return -EINVAL;
}
}
if (sk->sk_state == TCP_ESTABLISHED &&
ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
daddr = &sk->sk_v6_daddr;
if (addr_len >= sizeof(struct sockaddr_in6) &&
sin6->sin6_scope_id &&
__ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
fl6.flowi6_oif = sin6->sin6_scope_id;
} else {
if (sk->sk_state != TCP_ESTABLISHED)
return -EDESTADDRREQ;
proto = inet->inet_num;
daddr = &sk->sk_v6_daddr;
fl6.flowlabel = np->flow_label;
}
if (fl6.flowi6_oif == 0)
fl6.flowi6_oif = sk->sk_bound_dev_if;
if (msg->msg_controllen) {
opt = &opt_space;
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(struct ipv6_txoptions);
ipc6.opt = opt;
err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
}
if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
if (IS_ERR(flowlabel))
return -EINVAL;
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
}
if (!opt) {
opt = txopt_get(np);
opt_to_free = opt;
}
if (flowlabel)
opt = fl6_merge_options(&opt_space, flowlabel, opt);
opt = ipv6_fixup_options(&opt_space, opt);
fl6.flowi6_proto = proto;
fl6.flowi6_mark = ipc6.sockc.mark;
if (!hdrincl) {
rfv.msg = msg;
rfv.hlen = 0;
err = rawv6_probe_proto_opt(&rfv, &fl6);
if (err)
goto out;
}
if (!ipv6_addr_any(daddr))
fl6.daddr = *daddr;
else
fl6.daddr.s6_addr[15] = 0x1;
if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
fl6.saddr = np->saddr;
final_p = fl6_update_dst(&fl6, opt, &final);
if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
fl6.flowi6_oif = READ_ONCE(np->mcast_oif);
else if (!fl6.flowi6_oif)
fl6.flowi6_oif = READ_ONCE(np->ucast_oif);
security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
if (hdrincl)
fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
if (IS_ERR(dst)) {
err = PTR_ERR(dst);
goto out;
}
if (ipc6.hlimit < 0)
ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
if (hdrincl)
err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst,
msg->msg_flags, &ipc6.sockc);
else {
ipc6.opt = opt;
lock_sock(sk);
err = ip6_append_data(sk, raw6_getfrag, &rfv,
len, 0, &ipc6, &fl6, dst_rt6_info(dst),
msg->msg_flags);
if (err)
ip6_flush_pending_frames(sk);
else if (!(msg->msg_flags & MSG_MORE))
err = rawv6_push_pending_frames(sk, &fl6, rp);
release_sock(sk);
}
done:
dst_release(dst);
out:
fl6_sock_release(flowlabel);
txopt_put(opt_to_free);
return err < 0 ? err : len;
do_confirm:
if (msg->msg_flags & MSG_PROBE)
dst_confirm_neigh(dst, &fl6.daddr);
if (!(msg->msg_flags & MSG_PROBE) || len)
goto back_from_confirm;
err = 0;
goto done;
}
static int rawv6_seticmpfilter(struct sock *sk, int optname,
sockptr_t optval, int optlen)
{
switch (optname) {
case ICMPV6_FILTER:
if (optlen > sizeof(struct icmp6_filter))
optlen = sizeof(struct icmp6_filter);
if (copy_from_sockptr(&raw6_sk(sk)->filter, optval, optlen))
return -EFAULT;
return 0;
default:
return -ENOPROTOOPT;
}
return 0;
}
static int rawv6_geticmpfilter(struct sock *sk, int optname,
char __user *optval, int __user *optlen)
{
int len;
switch (optname) {
case ICMPV6_FILTER:
if (get_user(len, optlen))
return -EFAULT;
if (len < 0)
return -EINVAL;
if (len > sizeof(struct icmp6_filter))
len = sizeof(struct icmp6_filter);
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
return -EFAULT;
return 0;
default:
return -ENOPROTOOPT;
}
return 0;
}
static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen)
{
struct raw6_sock *rp = raw6_sk(sk);
int val;
if (optlen < sizeof(val))
return -EINVAL;
if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
switch (optname) {
case IPV6_HDRINCL:
if (sk->sk_type != SOCK_RAW)
return -EINVAL;
inet_assign_bit(HDRINCL, sk, val);
return 0;
case IPV6_CHECKSUM:
if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
level == IPPROTO_IPV6) {
return -EINVAL;
}
if (val > 0 && (val&1))
return -EINVAL;
if (val < 0) {
rp->checksum = 0;
} else {
rp->checksum = 1;
rp->offset = val;
}
return 0;
default:
return -ENOPROTOOPT;
}
}
static int rawv6_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen)
{
switch (level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_seticmpfilter(sk, optname, optval, optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM ||
optname == IPV6_HDRINCL)
break;
fallthrough;
default:
return ipv6_setsockopt(sk, level, optname, optval, optlen);
}
return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
}
static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
struct raw6_sock *rp = raw6_sk(sk);
int val, len;
if (get_user(len, optlen))
return -EFAULT;
switch (optname) {
case IPV6_HDRINCL:
val = inet_test_bit(HDRINCL, sk);
break;
case IPV6_CHECKSUM:
if (rp->checksum == 0)
val = -1;
else
val = rp->offset;
break;
default:
return -ENOPROTOOPT;
}
len = min_t(unsigned int, sizeof(int), len);
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, &val, len))
return -EFAULT;
return 0;
}
static int rawv6_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
switch (level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_geticmpfilter(sk, optname, optval, optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM ||
optname == IPV6_HDRINCL)
break;
fallthrough;
default:
return ipv6_getsockopt(sk, level, optname, optval, optlen);
}
return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
}
static int rawv6_ioctl(struct sock *sk, int cmd, int *karg)
{
switch (cmd) {
case SIOCOUTQ: {
*karg = sk_wmem_alloc_get(sk);
return 0;
}
case SIOCINQ: {
struct sk_buff *skb;
spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
*karg = skb->len;
else
*karg = 0;
spin_unlock_bh(&sk->sk_receive_queue.lock);
return 0;
}
default:
#ifdef CONFIG_IPV6_MROUTE
return ip6mr_ioctl(sk, cmd, karg);
#else
return -ENOIOCTLCMD;
#endif
}
}
#ifdef CONFIG_COMPAT
static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case SIOCOUTQ:
case SIOCINQ:
return -ENOIOCTLCMD;
default:
#ifdef CONFIG_IPV6_MROUTE
return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
#else
return -ENOIOCTLCMD;
#endif
}
}
#endif
static void rawv6_close(struct sock *sk, long timeout)
{
if (inet_sk(sk)->inet_num == IPPROTO_RAW)
ip6_ra_control(sk, -1);
ip6mr_sk_done(sk);
sk_common_release(sk);
}
static void raw6_destroy(struct sock *sk)
{
lock_sock(sk);
ip6_flush_pending_frames(sk);
release_sock(sk);
}
static int rawv6_init_sk(struct sock *sk)
{
struct raw6_sock *rp = raw6_sk(sk);
sk->sk_drop_counters = &rp->drop_counters;
switch (inet_sk(sk)->inet_num) {
case IPPROTO_ICMPV6:
rp->checksum = 1;
rp->offset = 2;
break;
case IPPROTO_MH:
rp->checksum = 1;
rp->offset = 4;
break;
default:
break;
}
return 0;
}
struct proto rawv6_prot = {
.name = "RAWv6",
.owner = THIS_MODULE,
.close = rawv6_close,
.destroy = raw6_destroy,
.connect = ip6_datagram_connect_v6_only,
.disconnect = __udp_disconnect,
.ioctl = rawv6_ioctl,
.init = rawv6_init_sk,
.setsockopt = rawv6_setsockopt,
.getsockopt = rawv6_getsockopt,
.sendmsg = rawv6_sendmsg,
.recvmsg = rawv6_recvmsg,
.bind = rawv6_bind,
.backlog_rcv = rawv6_rcv_skb,
.hash = raw_hash_sk,
.unhash = raw_unhash_sk,
.obj_size = sizeof(struct raw6_sock),
.ipv6_pinfo_offset = offsetof(struct raw6_sock, inet6),
.useroffset = offsetof(struct raw6_sock, filter),
.usersize = sizeof_field(struct raw6_sock, filter),
.h.raw_hash = &raw_v6_hashinfo,
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_rawv6_ioctl,
#endif
.diag_destroy = raw_abort,
};
#ifdef CONFIG_PROC_FS
static int raw6_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN) {
seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
} else {
struct sock *sp = v;
__u16 srcp = inet_sk(sp)->inet_num;
ip6_dgram_sock_seq_show(seq, v, srcp, 0,
raw_seq_private(seq)->bucket);
}
return 0;
}
static const struct seq_operations raw6_seq_ops = {
.start = raw_seq_start,
.next = raw_seq_next,
.stop = raw_seq_stop,
.show = raw6_seq_show,
};
static int __net_init raw6_init_net(struct net *net)
{
if (!proc_create_net_data("raw6", 0444, net->proc_net, &raw6_seq_ops,
sizeof(struct raw_iter_state), &raw_v6_hashinfo))
return -ENOMEM;
return 0;
}
static void __net_exit raw6_exit_net(struct net *net)
{
remove_proc_entry("raw6", net->proc_net);
}
static struct pernet_operations raw6_net_ops = {
.init = raw6_init_net,
.exit = raw6_exit_net,
};
int __init raw6_proc_init(void)
{
return register_pernet_subsys(&raw6_net_ops);
}
void raw6_proc_exit(void)
{
unregister_pernet_subsys(&raw6_net_ops);
}
#endif
const struct proto_ops inet6_sockraw_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect,
.socketpair = sock_no_socketpair,
.accept = sock_no_accept,
.getname = inet6_getname,
.poll = datagram_poll,
.ioctl = inet6_ioctl,
.gettstamp = sock_gettstamp,
.listen = sock_no_listen,
.shutdown = inet_shutdown,
.setsockopt = sock_common_setsockopt,
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
};
static struct inet_protosw rawv6_protosw = {
.type = SOCK_RAW,
.protocol = IPPROTO_IP,
.prot = &rawv6_prot,
.ops = &inet6_sockraw_ops,
.flags = INET_PROTOSW_REUSE,
};
int __init rawv6_init(void)
{
return inet6_register_protosw(&rawv6_protosw);
}
void rawv6_exit(void)
{
inet6_unregister_protosw(&rawv6_protosw);
}
