/*
* IPv6 BSD socket options interface
- * Linux INET6 implementation
+ * Linux INET6 implementation
*
* Authors:
- * Pedro Roque <roque@di.fc.ul.pt>
+ * Pedro Roque <roque@di.fc.ul.pt>
*
* Based on linux/net/ipv4/ip_sockglue.c
*
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
-#include <linux/sched.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <net/inet_common.h>
#include <net/tcp.h>
#include <net/udp.h>
+#include <net/udplite.h>
#include <net/xfrm.h>
#include <asm/uaccess.h>
DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
-static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
+static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
+ int proto)
{
- struct sk_buff *segs = ERR_PTR(-EINVAL);
- struct ipv6hdr *ipv6h;
- struct inet6_protocol *ops;
- int proto;
-
- if (unlikely(skb_shinfo(skb)->gso_type &
- ~(SKB_GSO_UDP |
- SKB_GSO_DODGY |
- SKB_GSO_TCP_ECN |
- SKB_GSO_TCPV6 |
- 0)))
- goto out;
-
- if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
- goto out;
+ struct inet6_protocol *ops = NULL;
- ipv6h = skb->nh.ipv6h;
- proto = ipv6h->nexthdr;
- __skb_pull(skb, sizeof(*ipv6h));
-
- rcu_read_lock();
for (;;) {
struct ipv6_opt_hdr *opth;
int len;
ops = rcu_dereference(inet6_protos[proto]);
if (unlikely(!ops))
- goto unlock;
+ break;
if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
break;
}
if (unlikely(!pskb_may_pull(skb, 8)))
- goto unlock;
+ break;
opth = (void *)skb->data;
len = opth->hdrlen * 8 + 8;
if (unlikely(!pskb_may_pull(skb, len)))
- goto unlock;
+ break;
proto = opth->nexthdr;
__skb_pull(skb, len);
}
- skb->h.raw = skb->data;
- if (likely(ops->gso_segment))
- segs = ops->gso_segment(skb, features);
+ return ops;
+}
+
+static int ipv6_gso_send_check(struct sk_buff *skb)
+{
+ struct ipv6hdr *ipv6h;
+ struct inet6_protocol *ops;
+ int err = -EINVAL;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+ goto out;
+
+ ipv6h = skb->nh.ipv6h;
+ __skb_pull(skb, sizeof(*ipv6h));
+ err = -EPROTONOSUPPORT;
-unlock:
+ rcu_read_lock();
+ ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
+ if (likely(ops && ops->gso_send_check)) {
+ skb->h.raw = skb->data;
+ err = ops->gso_send_check(skb);
+ }
+ rcu_read_unlock();
+
+out:
+ return err;
+}
+
+static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
+{
+ struct sk_buff *segs = ERR_PTR(-EINVAL);
+ struct ipv6hdr *ipv6h;
+ struct inet6_protocol *ops;
+
+ if (!(features & NETIF_F_HW_CSUM))
+ features &= ~NETIF_F_SG;
+
+ if (unlikely(skb_shinfo(skb)->gso_type &
+ ~(SKB_GSO_UDP |
+ SKB_GSO_DODGY |
+ SKB_GSO_TCP_ECN |
+ SKB_GSO_TCPV6 |
+ 0)))
+ goto out;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+ goto out;
+
+ ipv6h = skb->nh.ipv6h;
+ __skb_pull(skb, sizeof(*ipv6h));
+ segs = ERR_PTR(-EPROTONOSUPPORT);
+
+ rcu_read_lock();
+ ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
+ if (likely(ops && ops->gso_segment)) {
+ skb->h.raw = skb->data;
+ segs = ops->gso_segment(skb, features);
+ }
rcu_read_unlock();
if (unlikely(IS_ERR(segs)))
}
static struct packet_type ipv6_packet_type = {
- .type = __constant_htons(ETH_P_IPV6),
+ .type = __constant_htons(ETH_P_IPV6),
.func = ipv6_rcv,
+ .gso_send_check = ipv6_gso_send_check,
.gso_segment = ipv6_gso_segment,
};
struct sk_buff *pktopt;
if (sk->sk_protocol != IPPROTO_UDP &&
+ sk->sk_protocol != IPPROTO_UDPLITE &&
sk->sk_protocol != IPPROTO_TCP)
break;
sk->sk_family = PF_INET;
tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
} else {
+ struct proto *prot = &udp_prot;
+
+ if (sk->sk_protocol == IPPROTO_UDPLITE)
+ prot = &udplite_prot;
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
- sock_prot_inc_use(&udp_prot);
+ sock_prot_inc_use(prot);
local_bh_enable();
- sk->sk_prot = &udp_prot;
+ sk->sk_prot = prot;
sk->sk_socket->ops = &inet_dgram_ops;
sk->sk_family = PF_INET;
}
np->rxopt.bits.rxinfo = valbool;
retv = 0;
break;
-
+
case IPV6_2292PKTINFO:
np->rxopt.bits.rxoinfo = valbool;
retv = 0;
break;
case IPV6_TCLASS:
- if (val < 0 || val > 0xff)
+ if (val < -1 || val > 0xff)
goto e_inval;
np->tclass = val;
retv = 0;
break;
-
+
case IPV6_RECVTCLASS:
np->rxopt.bits.rxtclass = valbool;
retv = 0;
}
/* routing header option needs extra check */
- if (optname == IPV6_RTHDR && opt->srcrt) {
+ if (optname == IPV6_RTHDR && opt && opt->srcrt) {
struct ipv6_rt_hdr *rthdr = opt->srcrt;
- if (rthdr->type)
+ switch (rthdr->type) {
+ case IPV6_SRCRT_TYPE_0:
+#ifdef CONFIG_IPV6_MIP6
+ case IPV6_SRCRT_TYPE_2:
+#endif
+ break;
+ default:
goto sticky_done;
+ }
+
if ((rthdr->hdrlen & 1) ||
(rthdr->hdrlen >> 1) != rthdr->segments_left)
goto sticky_done;
EXPORT_SYMBOL(compat_ipv6_setsockopt);
#endif
-static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
+static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
char __user *optval, int len)
{
- if (!hdr)
+ struct ipv6_opt_hdr *hdr;
+
+ if (!opt || !opt->hopopt)
return 0;
- len = min_t(int, len, ipv6_optlen(hdr));
+ hdr = opt->hopopt;
+
+ len = min_t(unsigned int, len, ipv6_optlen(hdr));
if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
return -EFAULT;
return len;
switch (optname) {
case IPV6_ADDRFORM:
if (sk->sk_protocol != IPPROTO_UDP &&
+ sk->sk_protocol != IPPROTO_UDPLITE &&
sk->sk_protocol != IPPROTO_TCP)
return -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
case IPV6_MTU:
{
struct dst_entry *dst;
- val = 0;
+ val = 0;
lock_sock(sk);
dst = sk_dst_get(sk);
if (dst) {
{
lock_sock(sk);
- len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
+ len = ipv6_getsockopt_sticky(sk, np->opt,
optval, len);
release_sock(sk);
return put_user(len, optlen);
case IPV6_TCLASS:
val = np->tclass;
+ if (val < 0)
+ val = 0;
break;
case IPV6_RECVTCLASS:
break;
case IPV6_UNICAST_HOPS:
- val = np->hop_limit;
- break;
-
case IPV6_MULTICAST_HOPS:
- val = np->mcast_hops;
+ {
+ struct dst_entry *dst;
+
+ if (optname == IPV6_UNICAST_HOPS)
+ val = np->hop_limit;
+ else
+ val = np->mcast_hops;
+
+ dst = sk_dst_get(sk);
+ if (dst) {
+ if (val < 0)
+ val = dst_metric(dst, RTAX_HOPLIMIT);
+ if (val < 0)
+ val = ipv6_get_hoplimit(dst->dev);
+ dst_release(dst);
+ }
+ if (val < 0)
+ val = ipv6_devconf.hop_limit;
break;
+ }
case IPV6_MULTICAST_LOOP:
val = np->mc_loop;
projects / linux-2.6-omap-h63xx.git / blobdiff