#include <linux/init.h>
#include <linux/module.h>
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
#include <net/ndisc.h>
{
const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
- __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
- __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
+ __be32 sk1_rcv_saddr = sk_rcv_saddr(sk);
+ __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2);
int sk_ipv6only = ipv6_only_sock(sk);
int sk2_ipv6only = inet_v6_ipv6only(sk2);
int addr_type = ipv6_addr_type(sk_rcv_saddr6);
/* if both are mapped, treat as IPv4 */
if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED)
return (!sk2_ipv6only &&
- (!sk_rcv_saddr || !sk2_rcv_saddr ||
- sk_rcv_saddr == sk2_rcv_saddr));
+ (!sk1_rcv_saddr || !sk2_rcv_saddr ||
+ sk1_rcv_saddr == sk2_rcv_saddr));
if (addr_type2 == IPV6_ADDR_ANY &&
!(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
return 0;
}
+static unsigned int udp6_portaddr_hash(struct net *net,
+ const struct in6_addr *addr6,
+ unsigned int port)
+{
+ unsigned int hash, mix = net_hash_mix(net);
+
+ if (ipv6_addr_any(addr6))
+ hash = jhash_1word(0, mix);
+ else if (ipv6_addr_v4mapped(addr6))
+ hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix);
+ else
+ hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix);
+
+ return hash ^ port;
+}
+
+
int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
- return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal);
+ unsigned int hash2_nulladdr =
+ udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum);
+ unsigned int hash2_partial =
+ udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0);
+
+ /* precompute partial secondary hash */
+ udp_sk(sk)->udp_portaddr_hash = hash2_partial;
+ return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr);
+}
+
+static void udp_v6_rehash(struct sock *sk)
+{
+ u16 new_hash = udp6_portaddr_hash(sock_net(sk),
+ &inet6_sk(sk)->rcv_saddr,
+ inet_sk(sk)->inet_num);
+
+ udp_lib_rehash(sk, new_hash);
}
static inline int compute_score(struct sock *sk, struct net *net,
unsigned short hnum,
- struct in6_addr *saddr, __be16 sport,
- struct in6_addr *daddr, __be16 dport,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
int dif)
{
int score = -1;
- if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
+ if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum &&
sk->sk_family == PF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
struct inet_sock *inet = inet_sk(sk);
score = 0;
- if (inet->dport) {
- if (inet->dport != sport)
+ if (inet->inet_dport) {
+ if (inet->inet_dport != sport)
return -1;
score++;
}
return score;
}
+#define SCORE2_MAX (1 + 1 + 1)
+static inline int compute_score2(struct sock *sk, struct net *net,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, unsigned short hnum,
+ int dif)
+{
+ int score = -1;
+
+ if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum &&
+ sk->sk_family == PF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
+ return -1;
+ score = 0;
+ if (inet->inet_dport) {
+ if (inet->inet_dport != sport)
+ return -1;
+ score++;
+ }
+ if (!ipv6_addr_any(&np->daddr)) {
+ if (!ipv6_addr_equal(&np->daddr, saddr))
+ return -1;
+ score++;
+ }
+ if (sk->sk_bound_dev_if) {
+ if (sk->sk_bound_dev_if != dif)
+ return -1;
+ score++;
+ }
+ }
+ return score;
+}
+
+
+/* called with read_rcu_lock() */
+static struct sock *udp6_lib_lookup2(struct net *net,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, unsigned int hnum, int dif,
+ struct udp_hslot *hslot2, unsigned int slot2)
+{
+ struct sock *sk, *result;
+ struct hlist_nulls_node *node;
+ int score, badness;
+
+begin:
+ result = NULL;
+ badness = -1;
+ udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) {
+ score = compute_score2(sk, net, saddr, sport,
+ daddr, hnum, dif);
+ if (score > badness) {
+ result = sk;
+ badness = score;
+ if (score == SCORE2_MAX)
+ goto exact_match;
+ }
+ }
+ /*
+ * if the nulls value we got at the end of this lookup is
+ * not the expected one, we must restart lookup.
+ * We probably met an item that was moved to another chain.
+ */
+ if (get_nulls_value(node) != slot2)
+ goto begin;
+
+ if (result) {
+exact_match:
+ if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2)))
+ result = NULL;
+ else if (unlikely(compute_score2(result, net, saddr, sport,
+ daddr, hnum, dif) < badness)) {
+ sock_put(result);
+ goto begin;
+ }
+ }
+ return result;
+}
+
static struct sock *__udp6_lib_lookup(struct net *net,
- struct in6_addr *saddr, __be16 sport,
- struct in6_addr *daddr, __be16 dport,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
int dif, struct udp_table *udptable)
{
struct sock *sk, *result;
struct hlist_nulls_node *node;
unsigned short hnum = ntohs(dport);
- unsigned int hash = udp_hashfn(net, hnum, udptable->mask);
- struct udp_hslot *hslot = &udptable->hash[hash];
+ unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask);
+ struct udp_hslot *hslot2, *hslot = &udptable->hash[slot];
int score, badness;
rcu_read_lock();
+ if (hslot->count > 10) {
+ hash2 = udp6_portaddr_hash(net, daddr, hnum);
+ slot2 = hash2 & udptable->mask;
+ hslot2 = &udptable->hash2[slot2];
+ if (hslot->count < hslot2->count)
+ goto begin;
+
+ result = udp6_lib_lookup2(net, saddr, sport,
+ daddr, hnum, dif,
+ hslot2, slot2);
+ if (!result) {
+ hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum);
+ slot2 = hash2 & udptable->mask;
+ hslot2 = &udptable->hash2[slot2];
+ if (hslot->count < hslot2->count)
+ goto begin;
+
+ result = udp6_lib_lookup2(net, saddr, sport,
+ &in6addr_any, hnum, dif,
+ hslot2, slot2);
+ }
+ rcu_read_unlock();
+ return result;
+ }
begin:
result = NULL;
badness = -1;
* not the expected one, we must restart lookup.
* We probably met an item that was moved to another chain.
*/
- if (get_nulls_value(node) != hash)
+ if (get_nulls_value(node) != slot)
goto begin;
if (result) {
- if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt)))
+ if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2)))
result = NULL;
else if (unlikely(compute_score(result, net, hnum, saddr, sport,
daddr, dport, dif) < badness)) {
udptable);
}
+struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport, int dif)
+{
+ return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table);
+}
+EXPORT_SYMBOL_GPL(udp6_lib_lookup);
+
+
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
struct ipv6_pinfo *np = inet6_sk(sk);
struct inet_sock *inet = inet_sk(sk);
struct sk_buff *skb;
- unsigned int ulen, copied;
+ unsigned int ulen;
int peeked;
int err;
int is_udplite = IS_UDPLITE(sk);
int is_udp4;
+ bool slow;
if (addr_len)
*addr_len=sizeof(struct sockaddr_in6);
if (flags & MSG_ERRQUEUE)
return ipv6_recv_error(sk, msg, len);
+ if (np->rxpmtu && np->rxopt.bits.rxpmtu)
+ return ipv6_recv_rxpmtu(sk, msg, len);
+
try_again:
skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
&peeked, &err);
goto out;
ulen = skb->len - sizeof(struct udphdr);
- copied = len;
- if (copied > ulen)
- copied = ulen;
- else if (copied < ulen)
+ if (len > ulen)
+ len = ulen;
+ else if (len < ulen)
msg->msg_flags |= MSG_TRUNC;
is_udp4 = (skb->protocol == htons(ETH_P_IP));
* coverage checksum (UDP-Lite), do it before the copy.
*/
- if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
+ if (len < ulen || UDP_SKB_CB(skb)->partial_cov) {
if (udp_lib_checksum_complete(skb))
goto csum_copy_err;
}
if (skb_csum_unnecessary(skb))
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
- msg->msg_iov, copied );
+ msg->msg_iov,len);
else {
err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
if (err == -EINVAL)
UDP_MIB_INDATAGRAMS, is_udplite);
}
- sock_recv_timestamp(msg, sk, skb);
+ sock_recv_ts_and_drops(msg, sk, skb);
/* Copy the address. */
if (msg->msg_name) {
datagram_recv_ctl(sk, msg, skb);
}
- err = copied;
+ err = len;
if (flags & MSG_TRUNC)
err = ulen;
out_free:
- lock_sock(sk);
- skb_free_datagram(sk, skb);
- release_sock(sk);
+ skb_free_datagram_locked(sk, skb);
out:
return err;
csum_copy_err:
- lock_sock(sk);
+ slow = lock_sock_fast(sk);
if (!skb_kill_datagram(sk, skb, flags)) {
if (is_udp4)
UDP_INC_STATS_USER(sock_net(sk),
UDP6_INC_STATS_USER(sock_net(sk),
UDP_MIB_INERRORS, is_udplite);
}
- release_sock(sk);
+ unlock_sock_fast(sk, slow);
if (flags & MSG_DONTWAIT)
return -EAGAIN;
}
}
- if (sk->sk_filter) {
+ if (rcu_dereference_raw(sk->sk_filter)) {
if (udp_lib_checksum_complete(skb))
goto drop;
}
- if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
+ if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
- if (rc == -ENOMEM) {
+ if (rc == -ENOMEM)
UDP6_INC_STATS_BH(sock_net(sk),
UDP_MIB_RCVBUFERRORS, is_udplite);
- atomic_inc(&sk->sk_drops);
- }
- goto drop;
+ goto drop_no_sk_drops_inc;
}
return 0;
drop:
+ atomic_inc(&sk->sk_drops);
+drop_no_sk_drops_inc:
UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
kfree_skb(skb);
return -1;
if (!net_eq(sock_net(s), net))
continue;
- if (s->sk_hash == num && s->sk_family == PF_INET6) {
+ if (udp_sk(s)->udp_port_hash == num &&
+ s->sk_family == PF_INET6) {
struct ipv6_pinfo *np = inet6_sk(s);
- if (inet->dport) {
- if (inet->dport != rmt_port)
+ if (inet->inet_dport) {
+ if (inet->inet_dport != rmt_port)
continue;
}
if (!ipv6_addr_any(&np->daddr) &&
return NULL;
}
+static void flush_stack(struct sock **stack, unsigned int count,
+ struct sk_buff *skb, unsigned int final)
+{
+ unsigned int i;
+ struct sock *sk;
+ struct sk_buff *skb1;
+
+ for (i = 0; i < count; i++) {
+ skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC);
+
+ sk = stack[i];
+ if (skb1) {
+ if (sk_rcvqueues_full(sk, skb1)) {
+ kfree_skb(skb1);
+ goto drop;
+ }
+ bh_lock_sock(sk);
+ if (!sock_owned_by_user(sk))
+ udpv6_queue_rcv_skb(sk, skb1);
+ else if (sk_add_backlog(sk, skb1)) {
+ kfree_skb(skb1);
+ bh_unlock_sock(sk);
+ goto drop;
+ }
+ bh_unlock_sock(sk);
+ continue;
+ }
+drop:
+ atomic_inc(&sk->sk_drops);
+ UDP6_INC_STATS_BH(sock_net(sk),
+ UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk));
+ UDP6_INC_STATS_BH(sock_net(sk),
+ UDP_MIB_INERRORS, IS_UDPLITE(sk));
+ }
+}
/*
* Note: called only from the BH handler context,
* so we don't need to lock the hashes.
struct in6_addr *saddr, struct in6_addr *daddr,
struct udp_table *udptable)
{
- struct sock *sk, *sk2;
+ struct sock *sk, *stack[256 / sizeof(struct sock *)];
const struct udphdr *uh = udp_hdr(skb);
struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest));
int dif;
+ unsigned int i, count = 0;
spin_lock(&hslot->lock);
sk = sk_nulls_head(&hslot->head);
dif = inet6_iif(skb);
sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
- if (!sk) {
- kfree_skb(skb);
- goto out;
- }
-
- sk2 = sk;
- while ((sk2 = udp_v6_mcast_next(net, sk_nulls_next(sk2), uh->dest, daddr,
- uh->source, saddr, dif))) {
- struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
- if (buff) {
- bh_lock_sock(sk2);
- if (!sock_owned_by_user(sk2))
- udpv6_queue_rcv_skb(sk2, buff);
- else
- sk_add_backlog(sk2, buff);
- bh_unlock_sock(sk2);
+ while (sk) {
+ stack[count++] = sk;
+ sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr,
+ uh->source, saddr, dif);
+ if (unlikely(count == ARRAY_SIZE(stack))) {
+ if (!sk)
+ break;
+ flush_stack(stack, count, skb, ~0);
+ count = 0;
}
}
- bh_lock_sock(sk);
- if (!sock_owned_by_user(sk))
- udpv6_queue_rcv_skb(sk, skb);
- else
- sk_add_backlog(sk, skb);
- bh_unlock_sock(sk);
-out:
+ /*
+ * before releasing the lock, we must take reference on sockets
+ */
+ for (i = 0; i < count; i++)
+ sock_hold(stack[i]);
+
spin_unlock(&hslot->lock);
+
+ if (count) {
+ flush_stack(stack, count, skb, count - 1);
+
+ for (i = 0; i < count; i++)
+ sock_put(stack[i]);
+ } else {
+ kfree_skb(skb);
+ }
return 0;
}
int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
int proto)
{
+ struct net *net = dev_net(skb->dev);
struct sock *sk;
struct udphdr *uh;
- struct net_device *dev = skb->dev;
struct in6_addr *saddr, *daddr;
u32 ulen = 0;
- struct net *net = dev_net(skb->dev);
if (!pskb_may_pull(skb, sizeof(struct udphdr)))
- goto short_packet;
+ goto discard;
saddr = &ipv6_hdr(skb)->saddr;
daddr = &ipv6_hdr(skb)->daddr;
UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS,
proto == IPPROTO_UDPLITE);
- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
+ icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
kfree_skb(skb);
return 0;
/* deliver */
+ if (sk_rcvqueues_full(sk, skb)) {
+ sock_put(sk);
+ goto discard;
+ }
bh_lock_sock(sk);
if (!sock_owned_by_user(sk))
udpv6_queue_rcv_skb(sk, skb);
- else
- sk_add_backlog(sk, skb);
+ else if (sk_add_backlog(sk, skb)) {
+ atomic_inc(&sk->sk_drops);
+ bh_unlock_sock(sk);
+ sock_put(sk);
+ goto discard;
+ }
bh_unlock_sock(sk);
sock_put(sk);
return 0;
short_packet:
- LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
+ LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n",
proto == IPPROTO_UDPLITE ? "-Lite" : "",
- ulen, skb->len);
+ saddr,
+ ntohs(uh->source),
+ ulen,
+ skb->len,
+ daddr,
+ ntohs(uh->dest));
discard:
UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
- struct in6_addr *daddr, *final_p = NULL, final;
+ struct in6_addr *daddr, *final_p, final;
struct ipv6_txoptions *opt = NULL;
struct ip6_flowlabel *flowlabel = NULL;
struct flowi fl;
int ulen = len;
int hlimit = -1;
int tclass = -1;
+ int dontfrag = -1;
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
int err;
int connected = 0;
if (ipv6_addr_v4mapped(daddr)) {
struct sockaddr_in sin;
sin.sin_family = AF_INET;
- sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
+ sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport;
sin.sin_addr.s_addr = daddr->s6_addr32[3];
msg->msg_name = &sin;
msg->msg_namelen = sizeof(sin);
if (sk->sk_state != TCP_ESTABLISHED)
return -EDESTADDRREQ;
- fl.fl_ip_dport = inet->dport;
+ fl.fl_ip_dport = inet->inet_dport;
daddr = &np->daddr;
fl.fl6_flowlabel = np->flow_label;
connected = 1;
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(*opt);
- err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
+ err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit,
+ &tclass, &dontfrag);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
- fl.fl_ip_sport = inet->sport;
-
- /* merge ip6_build_xmit from ip6_output */
- if (opt && opt->srcrt) {
- struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
- ipv6_addr_copy(&final, &fl.fl6_dst);
- ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
- final_p = &final;
+ fl.fl_ip_sport = inet->inet_sport;
+
+ final_p = fl6_update_dst(&fl, opt, &final);
+ if (final_p)
connected = 0;
- }
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
fl.oif = np->mcast_oif;
if (tclass < 0)
tclass = np->tclass;
+ if (dontfrag < 0)
+ dontfrag = np->dontfrag;
+
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
sizeof(struct udphdr), hlimit, tclass, opt, &fl,
(struct rt6_info*)dst,
- corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
+ corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag);
if (err)
udp_v6_flush_pending_frames(sk);
else if (!corkreq)
skb->ip_summed = CHECKSUM_NONE;
/* Check if there is enough headroom to insert fragment header. */
- if ((skb_headroom(skb) < frag_hdr_sz) &&
+ if ((skb_mac_header(skb) < skb->head + frag_hdr_sz) &&
pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC))
goto out;
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- ipv6_select_ident(fptr);
+ ipv6_select_ident(fptr, (struct rt6_info *)skb_dst(skb));
/* Fragment the skb. ipv6 header and the remaining fields of the
* fragment header are updated in ipv6_gso_segment()
dest = &np->daddr;
src = &np->rcv_saddr;
- destp = ntohs(inet->dport);
- srcp = ntohs(inet->sport);
+ destp = ntohs(inet->inet_dport);
+ srcp = ntohs(inet->inet_sport);
seq_printf(seq,
"%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
- "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
+ "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
bucket,
src->s6_addr32[0], src->s6_addr32[1],
src->s6_addr32[2], src->s6_addr32[3], srcp,
},
};
-int udp6_proc_init(struct net *net)
+int __net_init udp6_proc_init(struct net *net)
{
return udp_proc_register(net, &udp6_seq_afinfo);
}
.backlog_rcv = udpv6_queue_rcv_skb,
.hash = udp_lib_hash,
.unhash = udp_lib_unhash,
+ .rehash = udp_v6_rehash,
.get_port = udp_v6_get_port,
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.compat_setsockopt = compat_udpv6_setsockopt,
.compat_getsockopt = compat_udpv6_getsockopt,
#endif
+ .clear_sk = sk_prot_clear_portaddr_nulls,
};
static struct inet_protosw udpv6_protosw = {
.protocol = IPPROTO_UDP,
.prot = &udpv6_prot,
.ops = &inet6_dgram_ops,
- .capability =-1,
.no_check = UDP_CSUM_DEFAULT,
.flags = INET_PROTOSW_PERMANENT,
};