EXPORT_SYMBOL(udp_table);
int sysctl_udp_mem[3] __read_mostly;
-int sysctl_udp_rmem_min __read_mostly;
-int sysctl_udp_wmem_min __read_mostly;
-
EXPORT_SYMBOL(sysctl_udp_mem);
+
+int sysctl_udp_rmem_min __read_mostly;
EXPORT_SYMBOL(sysctl_udp_rmem_min);
+
+int sysctl_udp_wmem_min __read_mostly;
EXPORT_SYMBOL(sysctl_udp_wmem_min);
atomic_t udp_memory_allocated;
*/
int udp_lib_get_port(struct sock *sk, unsigned short snum,
int (*saddr_comp)(const struct sock *sk1,
- const struct sock *sk2 ) )
+ const struct sock *sk2))
{
struct udp_hslot *hslot;
struct udp_table *udptable = sk->sk_prot->h.udp_table;
fail:
return error;
}
+EXPORT_SYMBOL(udp_lib_get_port);
static int ipv4_rcv_saddr_equal(const struct sock *sk1, const struct sock *sk2)
{
struct inet_sock *inet1 = inet_sk(sk1), *inet2 = inet_sk(sk2);
- return ( !ipv6_only_sock(sk2) &&
- (!inet1->rcv_saddr || !inet2->rcv_saddr ||
- inet1->rcv_saddr == inet2->rcv_saddr ));
+ return (!ipv6_only_sock(sk2) &&
+ (!inet1->rcv_saddr || !inet2->rcv_saddr ||
+ inet1->rcv_saddr == inet2->rcv_saddr));
}
int udp_v4_get_port(struct sock *sk, unsigned short snum)
if (unlikely(sk = skb_steal_sock(skb)))
return sk;
else
- return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
+ return __udp4_lib_lookup(dev_net(skb_dst(skb)->dev), iph->saddr, sport,
iph->daddr, dport, inet_iif(skb),
udptable);
}
void __udp4_lib_err(struct sk_buff *skb, u32 info, struct udp_table *udptable)
{
struct inet_sock *inet;
- struct iphdr *iph = (struct iphdr*)skb->data;
- struct udphdr *uh = (struct udphdr*)(skb->data+(iph->ihl<<2));
+ struct iphdr *iph = (struct iphdr *)skb->data;
+ struct udphdr *uh = (struct udphdr *)(skb->data+(iph->ihl<<2));
const int type = icmp_hdr(skb)->type;
const int code = icmp_hdr(skb)->code;
struct sock *sk;
if (!harderr || sk->sk_state != TCP_ESTABLISHED)
goto out;
} else {
- ip_icmp_error(sk, skb, err, uh->dest, info, (u8*)(uh+1));
+ ip_icmp_error(sk, skb, err, uh->dest, info, (u8 *)(uh+1));
}
sk->sk_err = err;
sk->sk_error_report(sk);
* (checksum field must be zeroed out)
*/
static void udp4_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
- __be32 src, __be32 dst, int len )
+ __be32 src, __be32 dst, int len)
{
unsigned int offset;
struct udphdr *uh = udp_hdr(skb);
} else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
- udp4_hwcsum_outgoing(sk, skb, fl->fl4_src,fl->fl4_dst, up->len);
+ udp4_hwcsum_outgoing(sk, skb, fl->fl4_src, fl->fl4_dst, up->len);
goto send;
} else /* `normal' UDP */
/* add protocol-dependent pseudo-header */
uh->check = csum_tcpudp_magic(fl->fl4_src, fl->fl4_dst, up->len,
- sk->sk_protocol, csum );
+ sk->sk_protocol, csum);
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
send:
err = ip_push_pending_frames(sk);
+ if (err) {
+ if (err == -ENOBUFS && !inet->recverr) {
+ UDP_INC_STATS_USER(sock_net(sk),
+ UDP_MIB_SNDBUFERRORS, is_udplite);
+ err = 0;
+ }
+ } else
+ UDP_INC_STATS_USER(sock_net(sk),
+ UDP_MIB_OUTDATAGRAMS, is_udplite);
out:
up->len = 0;
up->pending = 0;
- if (!err)
- UDP_INC_STATS_USER(sock_net(sk),
- UDP_MIB_OUTDATAGRAMS, is_udplite);
return err;
}
* Check the flags.
*/
- if (msg->msg_flags&MSG_OOB) /* Mirror BSD error message compatibility */
+ if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message compatibility */
return -EOPNOTSUPP;
ipc.opt = NULL;
+ ipc.shtx.flags = 0;
if (up->pending) {
/*
* Get and verify the address.
*/
if (msg->msg_name) {
- struct sockaddr_in * usin = (struct sockaddr_in*)msg->msg_name;
+ struct sockaddr_in * usin = (struct sockaddr_in *)msg->msg_name;
if (msg->msg_namelen < sizeof(*usin))
return -EINVAL;
if (usin->sin_family != AF_INET) {
ipc.addr = inet->saddr;
ipc.oif = sk->sk_bound_dev_if;
+ err = sock_tx_timestamp(msg, sk, &ipc.shtx);
+ if (err)
+ return err;
if (msg->msg_controllen) {
err = ip_cmsg_send(sock_net(sk), msg, &ipc);
if (err)
}
if (connected)
- rt = (struct rtable*)sk_dst_check(sk, 0);
+ rt = (struct rtable *)sk_dst_check(sk, 0);
if (rt == NULL) {
struct flowi fl = { .oif = ipc.oif,
+ .mark = sk->sk_mark,
.nl_u = { .ip4_u =
{ .daddr = faddr,
.saddr = saddr,
err = 0;
goto out;
}
+EXPORT_SYMBOL(udp_sendmsg);
int udp_sendpage(struct sock *sk, struct page *page, int offset,
size_t size, int flags)
return ret;
}
+
+/**
+ * first_packet_length - return length of first packet in receive queue
+ * @sk: socket
+ *
+ * Drops all bad checksum frames, until a valid one is found.
+ * Returns the length of found skb, or 0 if none is found.
+ */
+static unsigned int first_packet_length(struct sock *sk)
+{
+ struct sk_buff_head list_kill, *rcvq = &sk->sk_receive_queue;
+ struct sk_buff *skb;
+ unsigned int res;
+
+ __skb_queue_head_init(&list_kill);
+
+ spin_lock_bh(&rcvq->lock);
+ while ((skb = skb_peek(rcvq)) != NULL &&
+ udp_lib_checksum_complete(skb)) {
+ UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS,
+ IS_UDPLITE(sk));
+ __skb_unlink(skb, rcvq);
+ __skb_queue_tail(&list_kill, skb);
+ }
+ res = skb ? skb->len : 0;
+ spin_unlock_bh(&rcvq->lock);
+
+ if (!skb_queue_empty(&list_kill)) {
+ lock_sock(sk);
+ __skb_queue_purge(&list_kill);
+ sk_mem_reclaim_partial(sk);
+ release_sock(sk);
+ }
+ return res;
+}
+
/*
* IOCTL requests applicable to the UDP protocol
*/
switch (cmd) {
case SIOCOUTQ:
{
- int amount = atomic_read(&sk->sk_wmem_alloc);
+ int amount = sk_wmem_alloc_get(sk);
+
return put_user(amount, (int __user *)arg);
}
case SIOCINQ:
{
- struct sk_buff *skb;
- unsigned long amount;
+ unsigned int amount = first_packet_length(sk);
- amount = 0;
- spin_lock_bh(&sk->sk_receive_queue.lock);
- skb = skb_peek(&sk->sk_receive_queue);
- if (skb != NULL) {
+ if (amount)
/*
* We will only return the amount
* of this packet since that is all
* that will be read.
*/
- amount = skb->len - sizeof(struct udphdr);
- }
- spin_unlock_bh(&sk->sk_receive_queue.lock);
+ amount -= sizeof(struct udphdr);
+
return put_user(amount, (int __user *)arg);
}
return 0;
}
+EXPORT_SYMBOL(udp_ioctl);
/*
* This should be easy, if there is something there we
* Check any passed addresses
*/
if (addr_len)
- *addr_len=sizeof(*sin);
+ *addr_len = sizeof(*sin);
if (flags & MSG_ERRQUEUE)
return ip_recv_error(sk, msg, len);
if (skb_csum_unnecessary(skb))
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
- msg->msg_iov, copied );
+ msg->msg_iov, copied);
else {
- err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
+ err = skb_copy_and_csum_datagram_iovec(skb,
+ sizeof(struct udphdr),
+ msg->msg_iov);
if (err == -EINVAL)
goto csum_copy_err;
sock_recv_timestamp(msg, sk, skb);
/* Copy the address. */
- if (sin)
- {
+ if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = udp_hdr(skb)->source;
sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
sk_dst_reset(sk);
return 0;
}
+EXPORT_SYMBOL(udp_disconnect);
void udp_lib_unhash(struct sock *sk)
{
* Note that in the success and error cases, the skb is assumed to
* have either been requeued or freed.
*/
-int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
+int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
struct udp_sock *up = udp_sk(sk);
int rc;
sk = sknext;
} while (sknext);
} else
- kfree_skb(skb);
+ consume_skb(skb);
spin_unlock(&hslot->lock);
return 0;
}
if (uh->check == 0) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else if (skb->ip_summed == CHECKSUM_COMPLETE) {
- if (!csum_tcpudp_magic(iph->saddr, iph->daddr, skb->len,
+ if (!csum_tcpudp_magic(iph->saddr, iph->daddr, skb->len,
proto, skb->csum))
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
struct sock *sk;
struct udphdr *uh;
unsigned short ulen;
- struct rtable *rt = (struct rtable*)skb->dst;
+ struct rtable *rt = skb_rtable(skb);
__be32 saddr, daddr;
struct net *net = dev_net(skb->dev);
* Socket option code for UDP
*/
int udp_lib_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen,
+ char __user *optval, unsigned int optlen,
int (*push_pending_frames)(struct sock *))
{
struct udp_sock *up = udp_sk(sk);
int err = 0;
int is_udplite = IS_UDPLITE(sk);
- if (optlen<sizeof(int))
+ if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return err;
}
+EXPORT_SYMBOL(udp_lib_setsockopt);
int udp_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
if (level == SOL_UDP || level == SOL_UDPLITE)
return udp_lib_setsockopt(sk, level, optname, optval, optlen,
#ifdef CONFIG_COMPAT
int compat_udp_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
if (level == SOL_UDP || level == SOL_UDPLITE)
return udp_lib_setsockopt(sk, level, optname, optval, optlen,
struct udp_sock *up = udp_sk(sk);
int val, len;
- if (get_user(len,optlen))
+ if (get_user(len, optlen))
return -EFAULT;
len = min_t(unsigned int, len, sizeof(int));
if (put_user(len, optlen))
return -EFAULT;
- if (copy_to_user(optval, &val,len))
+ if (copy_to_user(optval, &val, len))
return -EFAULT;
return 0;
}
+EXPORT_SYMBOL(udp_lib_getsockopt);
int udp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
unsigned int mask = datagram_poll(file, sock, wait);
struct sock *sk = sock->sk;
- int is_lite = IS_UDPLITE(sk);
/* Check for false positives due to checksum errors */
- if ( (mask & POLLRDNORM) &&
- !(file->f_flags & O_NONBLOCK) &&
- !(sk->sk_shutdown & RCV_SHUTDOWN)){
- struct sk_buff_head *rcvq = &sk->sk_receive_queue;
- struct sk_buff *skb;
-
- spin_lock_bh(&rcvq->lock);
- while ((skb = skb_peek(rcvq)) != NULL &&
- udp_lib_checksum_complete(skb)) {
- UDP_INC_STATS_BH(sock_net(sk),
- UDP_MIB_INERRORS, is_lite);
- __skb_unlink(skb, rcvq);
- kfree_skb(skb);
- }
- spin_unlock_bh(&rcvq->lock);
-
- /* nothing to see, move along */
- if (skb == NULL)
- mask &= ~(POLLIN | POLLRDNORM);
- }
+ if ((mask & POLLRDNORM) && !(file->f_flags & O_NONBLOCK) &&
+ !(sk->sk_shutdown & RCV_SHUTDOWN) && !first_packet_length(sk))
+ mask &= ~(POLLIN | POLLRDNORM);
return mask;
}
+EXPORT_SYMBOL(udp_poll);
struct proto udp_prot = {
.name = "UDP",
.compat_getsockopt = compat_udp_getsockopt,
#endif
};
+EXPORT_SYMBOL(udp_prot);
/* ------------------------------------------------------------------------ */
#ifdef CONFIG_PROC_FS
rc = -ENOMEM;
return rc;
}
+EXPORT_SYMBOL(udp_proc_register);
void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo)
{
proc_net_remove(net, afinfo->name);
}
+EXPORT_SYMBOL(udp_proc_unregister);
/* ------------------------------------------------------------------------ */
static void udp4_format_sock(struct sock *sp, struct seq_file *f,
seq_printf(f, "%4d: %08X:%04X %08X:%04X"
" %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d%n",
bucket, src, srcp, dest, destp, sp->sk_state,
- atomic_read(&sp->sk_wmem_alloc),
- atomic_read(&sp->sk_rmem_alloc),
+ sk_wmem_alloc_get(sp),
+ sk_rmem_alloc_get(sp),
0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
atomic_read(&sp->sk_refcnt), sp,
atomic_read(&sp->sk_drops), len);
int len;
udp4_format_sock(v, seq, state->bucket, &len);
- seq_printf(seq, "%*s\n", 127 - len ,"");
+ seq_printf(seq, "%*s\n", 127 - len, "");
}
return 0;
}
sysctl_udp_wmem_min = SK_MEM_QUANTUM;
}
-EXPORT_SYMBOL(udp_disconnect);
-EXPORT_SYMBOL(udp_ioctl);
-EXPORT_SYMBOL(udp_prot);
-EXPORT_SYMBOL(udp_sendmsg);
-EXPORT_SYMBOL(udp_lib_getsockopt);
-EXPORT_SYMBOL(udp_lib_setsockopt);
-EXPORT_SYMBOL(udp_poll);
-EXPORT_SYMBOL(udp_lib_get_port);
+int udp4_ufo_send_check(struct sk_buff *skb)
+{
+ const struct iphdr *iph;
+ struct udphdr *uh;
+
+ if (!pskb_may_pull(skb, sizeof(*uh)))
+ return -EINVAL;
+
+ iph = ip_hdr(skb);
+ uh = udp_hdr(skb);
+
+ uh->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, skb->len,
+ IPPROTO_UDP, 0);
+ skb->csum_start = skb_transport_header(skb) - skb->head;
+ skb->csum_offset = offsetof(struct udphdr, check);
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ return 0;
+}
+
+struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb, int features)
+{
+ struct sk_buff *segs = ERR_PTR(-EINVAL);
+ unsigned int mss;
+ int offset;
+ __wsum csum;
+
+ mss = skb_shinfo(skb)->gso_size;
+ if (unlikely(skb->len <= mss))
+ goto out;
+
+ if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
+ /* Packet is from an untrusted source, reset gso_segs. */
+ int type = skb_shinfo(skb)->gso_type;
+
+ if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) ||
+ !(type & (SKB_GSO_UDP))))
+ goto out;
+
+ skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss);
+
+ segs = NULL;
+ goto out;
+ }
+
+ /* Do software UFO. Complete and fill in the UDP checksum as HW cannot
+ * do checksum of UDP packets sent as multiple IP fragments.
+ */
+ offset = skb->csum_start - skb_headroom(skb);
+ csum = skb_checksum(skb, offset, skb->len - offset, 0);
+ offset += skb->csum_offset;
+ *(__sum16 *)(skb->data + offset) = csum_fold(csum);
+ skb->ip_summed = CHECKSUM_NONE;
+
+ /* Fragment the skb. IP headers of the fragments are updated in
+ * inet_gso_segment()
+ */
+ segs = skb_segment(skb, features);
+out:
+ return segs;
+}
-#ifdef CONFIG_PROC_FS
-EXPORT_SYMBOL(udp_proc_register);
-EXPORT_SYMBOL(udp_proc_unregister);
-#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff