* for datagram xmit
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/string.h>
static __inline__ void ipv6_select_ident(struct sk_buff *skb, struct frag_hdr *fhdr)
{
static u32 ipv6_fragmentation_id = 1;
- static spinlock_t ip6_id_lock = SPIN_LOCK_UNLOCKED;
+ static DEFINE_SPINLOCK(ip6_id_lock);
spin_lock_bh(&ip6_id_lock);
fhdr->identification = htonl(ipv6_fragmentation_id);
static inline int ip6_output_finish(struct sk_buff *skb)
{
-
struct dst_entry *dst = skb->dst;
- struct hh_cache *hh = dst->hh;
-
- if (hh) {
- int hh_alen;
-
- read_lock_bh(&hh->hh_lock);
- hh_alen = HH_DATA_ALIGN(hh->hh_len);
- memcpy(skb->data - hh_alen, hh->hh_data, hh_alen);
- read_unlock_bh(&hh->hh_lock);
- skb_push(skb, hh->hh_len);
- return hh->hh_output(skb);
- } else if (dst->neighbour)
+
+ if (dst->hh)
+ return neigh_hh_output(dst->hh, skb);
+ else if (dst->neighbour)
return dst->neighbour->output(skb);
- IP6_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);
kfree_skb(skb);
return -EINVAL;
if (ipv6_addr_is_multicast(&skb->nh.ipv6h->daddr)) {
struct ipv6_pinfo* np = skb->sk ? inet6_sk(skb->sk) : NULL;
+ struct inet6_dev *idev = ip6_dst_idev(skb->dst);
if (!(dev->flags & IFF_LOOPBACK) && (!np || np->mc_loop) &&
ipv6_chk_mcast_addr(dev, &skb->nh.ipv6h->daddr,
ip6_dev_loopback_xmit);
if (skb->nh.ipv6h->hop_limit == 0) {
- IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
kfree_skb(skb);
return 0;
}
}
- IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
+ IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS);
}
return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb,NULL, skb->dev,ip6_output_finish);
int ip6_output(struct sk_buff *skb)
{
- if (skb->len > dst_pmtu(skb->dst))
+ if ((skb->len > dst_mtu(skb->dst) && !skb_is_gso(skb)) ||
+ dst_allfrag(skb->dst))
return ip6_fragment(skb, ip6_output2);
else
return ip6_output2(skb);
}
-#ifdef CONFIG_NETFILTER
-int ip6_route_me_harder(struct sk_buff *skb)
-{
- struct ipv6hdr *iph = skb->nh.ipv6h;
- struct dst_entry *dst;
- struct flowi fl = {
- .oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
- .nl_u =
- { .ip6_u =
- { .daddr = iph->daddr,
- .saddr = iph->saddr, } },
- .proto = iph->nexthdr,
- };
-
- dst = ip6_route_output(skb->sk, &fl);
-
- if (dst->error) {
- IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ip6_route_me_harder: No more route.\n"));
- dst_release(dst);
- return -EINVAL;
- }
-
- /* Drop old route. */
- dst_release(skb->dst);
-
- skb->dst = dst;
- return 0;
-}
-#endif
-
-static inline int ip6_maybe_reroute(struct sk_buff *skb)
-{
-#ifdef CONFIG_NETFILTER
- if (skb->nfcache & NFC_ALTERED){
- if (ip6_route_me_harder(skb) != 0){
- kfree_skb(skb);
- return -EINVAL;
- }
- }
-#endif /* CONFIG_NETFILTER */
- return dst_output(skb);
-}
-
/*
* xmit an sk_buff (used by TCP)
*/
int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
struct ipv6_txoptions *opt, int ipfragok)
{
- struct ipv6_pinfo *np = sk ? inet6_sk(sk) : NULL;
+ struct ipv6_pinfo *np = inet6_sk(sk);
struct in6_addr *first_hop = &fl->fl6_dst;
struct dst_entry *dst = skb->dst;
struct ipv6hdr *hdr;
u8 proto = fl->proto;
int seg_len = skb->len;
- int hlimit;
+ int hlimit, tclass;
u32 mtu;
if (opt) {
if (skb_headroom(skb) < head_room) {
struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
- kfree_skb(skb);
- skb = skb2;
- if (skb == NULL) {
- IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ if (skb2 == NULL) {
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_OUTDISCARDS);
+ kfree_skb(skb);
return -ENOBUFS;
}
+ kfree_skb(skb);
+ skb = skb2;
if (sk)
skb_set_owner_w(skb, sk);
}
* Fill in the IPv6 header
*/
- *(u32*)hdr = htonl(0x60000000) | fl->fl6_flowlabel;
hlimit = -1;
if (np)
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
+ if (hlimit < 0)
+ hlimit = ipv6_get_hoplimit(dst->dev);
+
+ tclass = -1;
+ if (np)
+ tclass = np->tclass;
+ if (tclass < 0)
+ tclass = 0;
+
+ *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl->fl6_flowlabel;
hdr->payload_len = htons(seg_len);
hdr->nexthdr = proto;
ipv6_addr_copy(&hdr->saddr, &fl->fl6_src);
ipv6_addr_copy(&hdr->daddr, first_hop);
- mtu = dst_pmtu(dst);
- if ((skb->len <= mtu) || ipfragok) {
- IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
- return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ skb->priority = sk->sk_priority;
+
+ mtu = dst_mtu(dst);
+ if ((skb->len <= mtu) || ipfragok || skb_is_gso(skb)) {
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_OUTREQUESTS);
+ return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev,
+ dst_output);
}
if (net_ratelimit())
printk(KERN_DEBUG "IPv6: sending pkt_too_big to self\n");
skb->dev = dst->dev;
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
- IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
+ IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
kfree_skb(skb);
return -EMSGSIZE;
}
hdr = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
skb->nh.ipv6h = hdr;
- *(u32*)hdr = htonl(0x60000000);
+ *(__be32*)hdr = htonl(0x60000000);
hdr->payload_len = htons(len);
hdr->nexthdr = proto;
return 0;
}
-int ip6_call_ra_chain(struct sk_buff *skb, int sel)
+static int ip6_call_ra_chain(struct sk_buff *skb, int sel)
{
struct ip6_ra_chain *ra;
struct sock *last = NULL;
read_lock(&ip6_ra_lock);
for (ra = ip6_ra_chain; ra; ra = ra->next) {
struct sock *sk = ra->sk;
- if (sk && ra->sel == sel) {
+ if (sk && ra->sel == sel &&
+ (!sk->sk_bound_dev_if ||
+ sk->sk_bound_dev_if == skb->dev->ifindex)) {
if (last) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2)
return 0;
}
+static int ip6_forward_proxy_check(struct sk_buff *skb)
+{
+ struct ipv6hdr *hdr = skb->nh.ipv6h;
+ u8 nexthdr = hdr->nexthdr;
+ int offset;
+
+ if (ipv6_ext_hdr(nexthdr)) {
+ offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr);
+ if (offset < 0)
+ return 0;
+ } else
+ offset = sizeof(struct ipv6hdr);
+
+ if (nexthdr == IPPROTO_ICMPV6) {
+ struct icmp6hdr *icmp6;
+
+ if (!pskb_may_pull(skb, skb->nh.raw + offset + 1 - skb->data))
+ return 0;
+
+ icmp6 = (struct icmp6hdr *)(skb->nh.raw + offset);
+
+ switch (icmp6->icmp6_type) {
+ case NDISC_ROUTER_SOLICITATION:
+ case NDISC_ROUTER_ADVERTISEMENT:
+ case NDISC_NEIGHBOUR_SOLICITATION:
+ case NDISC_NEIGHBOUR_ADVERTISEMENT:
+ case NDISC_REDIRECT:
+ /* For reaction involving unicast neighbor discovery
+ * message destined to the proxied address, pass it to
+ * input function.
+ */
+ return 1;
+ default:
+ break;
+ }
+ }
+
+ /*
+ * The proxying router can't forward traffic sent to a link-local
+ * address, so signal the sender and discard the packet. This
+ * behavior is clarified by the MIPv6 specification.
+ */
+ if (ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL) {
+ dst_link_failure(skb);
+ return -1;
+ }
+
+ return 0;
+}
+
static inline int ip6_forward_finish(struct sk_buff *skb)
{
return dst_output(skb);
goto error;
if (!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
- IP6_INC_STATS(IPSTATS_MIB_INDISCARDS);
+ IP6_INC_STATS(ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
goto drop;
}
skb->dev = dst->dev;
icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
0, skb->dev);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_INHDRERRORS);
kfree_skb(skb);
return -ETIMEDOUT;
}
+ /* XXX: idev->cnf.proxy_ndp? */
+ if (ipv6_devconf.proxy_ndp &&
+ pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
+ int proxied = ip6_forward_proxy_check(skb);
+ if (proxied > 0)
+ return ip6_input(skb);
+ else if (proxied < 0) {
+ IP6_INC_STATS(ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
+ goto drop;
+ }
+ }
+
if (!xfrm6_route_forward(skb)) {
- IP6_INC_STATS(IPSTATS_MIB_INDISCARDS);
+ IP6_INC_STATS(ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
goto drop;
}
+ dst = skb->dst;
/* IPv6 specs say nothing about it, but it is clear that we cannot
send redirects to source routed frames.
goto error;
}
- if (skb->len > dst_pmtu(dst)) {
+ if (skb->len > dst_mtu(dst)) {
/* Again, force OUTPUT device used as source address */
skb->dev = dst->dev;
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, dst_pmtu(dst), skb->dev);
- IP6_INC_STATS_BH(IPSTATS_MIB_INTOOBIGERRORS);
- IP6_INC_STATS_BH(IPSTATS_MIB_FRAGFAILS);
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, dst_mtu(dst), skb->dev);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_INTOOBIGERRORS);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_FRAGFAILS);
kfree_skb(skb);
return -EMSGSIZE;
}
if (skb_cow(skb, dst->dev->hard_header_len)) {
- IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ IP6_INC_STATS(ip6_dst_idev(dst), IPSTATS_MIB_OUTDISCARDS);
goto drop;
}
hdr->hop_limit--;
- IP6_INC_STATS_BH(IPSTATS_MIB_OUTFORWDATAGRAMS);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_OUTFORWDATAGRAMS);
return NF_HOOK(PF_INET6,NF_IP6_FORWARD, skb, skb->dev, dst->dev, ip6_forward_finish);
error:
- IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+ IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_INADDRERRORS);
drop:
kfree_skb(skb);
return -EINVAL;
to->pkt_type = from->pkt_type;
to->priority = from->priority;
to->protocol = from->protocol;
- to->security = from->security;
+ dst_release(to->dst);
to->dst = dst_clone(from->dst);
to->dev = from->dev;
+ to->mark = from->mark;
#ifdef CONFIG_NET_SCHED
to->tc_index = from->tc_index;
#endif
#ifdef CONFIG_NETFILTER
- to->nfmark = from->nfmark;
/* Connection association is same as pre-frag packet */
+ nf_conntrack_put(to->nfct);
to->nfct = from->nfct;
nf_conntrack_get(to->nfct);
to->nfctinfo = from->nfctinfo;
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ nf_conntrack_put_reasm(to->nfct_reasm);
+ to->nfct_reasm = from->nfct_reasm;
+ nf_conntrack_get_reasm(to->nfct_reasm);
+#endif
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(to->nf_bridge);
to->nf_bridge = from->nf_bridge;
nf_bridge_get(to->nf_bridge);
#endif
-#ifdef CONFIG_NETFILTER_DEBUG
- to->nf_debug = from->nf_debug;
-#endif
#endif
+ skb_copy_secmark(to, from);
}
int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr)
switch (**nexthdr) {
case NEXTHDR_HOP:
+ break;
case NEXTHDR_ROUTING:
+ found_rhdr = 1;
+ break;
case NEXTHDR_DEST:
- if (**nexthdr == NEXTHDR_ROUTING) found_rhdr = 1;
- if (**nexthdr == NEXTHDR_DEST && found_rhdr) return offset;
- offset += ipv6_optlen(exthdr);
- *nexthdr = &exthdr->nexthdr;
- exthdr = (struct ipv6_opt_hdr*)(skb->nh.raw + offset);
+#ifdef CONFIG_IPV6_MIP6
+ if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0)
+ break;
+#endif
+ if (found_rhdr)
+ return offset;
break;
default :
return offset;
}
+
+ offset += ipv6_optlen(exthdr);
+ *nexthdr = &exthdr->nexthdr;
+ exthdr = (struct ipv6_opt_hdr*)(skb->nh.raw + offset);
}
return offset;
}
+EXPORT_SYMBOL_GPL(ip6_find_1stfragopt);
static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
{
struct net_device *dev;
struct sk_buff *frag;
struct rt6_info *rt = (struct rt6_info*)skb->dst;
+ struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
struct ipv6hdr *tmp_hdr;
struct frag_hdr *fh;
unsigned int mtu, hlen, left, len;
- u32 frag_id = 0;
+ __be32 frag_id = 0;
int ptr, offset = 0, err=0;
u8 *prevhdr, nexthdr = 0;
hlen = ip6_find_1stfragopt(skb, &prevhdr);
nexthdr = *prevhdr;
- mtu = dst_pmtu(&rt->u.dst) - hlen - sizeof(struct frag_hdr);
+ mtu = dst_mtu(&rt->u.dst);
+ if (np && np->frag_size < mtu) {
+ if (np->frag_size)
+ mtu = np->frag_size;
+ }
+ mtu -= hlen + sizeof(struct frag_hdr);
if (skb_shinfo(skb)->frag_list) {
int first_len = skb_pagelen(skb);
skb_headroom(frag) < hlen)
goto slow_path;
- /* Correct socket ownership. */
- if (frag->sk == NULL)
- goto slow_path;
-
/* Partially cloned skb? */
if (skb_shared(frag))
goto slow_path;
+
+ BUG_ON(frag->sk);
+ if (skb->sk) {
+ sock_hold(skb->sk);
+ frag->sk = skb->sk;
+ frag->destructor = sock_wfree;
+ skb->truesize -= frag->truesize;
+ }
}
err = 0;
skb_shinfo(skb)->frag_list = NULL;
/* BUILD HEADER */
- tmp_hdr = kmalloc(hlen, GFP_ATOMIC);
+ *prevhdr = NEXTHDR_FRAGMENT;
+ tmp_hdr = kmemdup(skb->nh.raw, hlen, GFP_ATOMIC);
if (!tmp_hdr) {
- IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
+ IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
return -ENOMEM;
}
- *prevhdr = NEXTHDR_FRAGMENT;
- memcpy(tmp_hdr, skb->nh.raw, hlen);
__skb_pull(skb, hlen);
fh = (struct frag_hdr*)__skb_push(skb, sizeof(struct frag_hdr));
skb->nh.raw = __skb_push(skb, hlen);
skb->data_len = first_len - skb_headlen(skb);
skb->len = first_len;
skb->nh.ipv6h->payload_len = htons(first_len - sizeof(struct ipv6hdr));
-
+
+ dst_hold(&rt->u.dst);
for (;;) {
/* Prepare header of the next frame,
* before previous one went down. */
if (frag) {
+ frag->ip_summed = CHECKSUM_NONE;
frag->h.raw = frag->data;
fh = (struct frag_hdr*)__skb_push(frag, sizeof(struct frag_hdr));
frag->nh.raw = __skb_push(frag, hlen);
}
err = output(skb);
+ if(!err)
+ IP6_INC_STATS(ip6_dst_idev(&rt->u.dst), IPSTATS_MIB_FRAGCREATES);
+
if (err || !frag)
break;
skb->next = NULL;
}
- if (tmp_hdr)
- kfree(tmp_hdr);
+ kfree(tmp_hdr);
if (err == 0) {
- IP6_INC_STATS(IPSTATS_MIB_FRAGOKS);
+ IP6_INC_STATS(ip6_dst_idev(&rt->u.dst), IPSTATS_MIB_FRAGOKS);
+ dst_release(&rt->u.dst);
return 0;
}
frag = skb;
}
- IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
+ IP6_INC_STATS(ip6_dst_idev(&rt->u.dst), IPSTATS_MIB_FRAGFAILS);
+ dst_release(&rt->u.dst);
return err;
}
*/
if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_RESERVED_SPACE(rt->u.dst.dev), GFP_ATOMIC)) == NULL) {
- NETDEBUG(printk(KERN_INFO "IPv6: frag: no memory for new fragment!\n"));
- IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
+ NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_FRAGFAILS);
err = -ENOMEM;
goto fail;
}
*/
fh->nexthdr = nexthdr;
fh->reserved = 0;
- if (frag_id) {
+ if (!frag_id) {
ipv6_select_ident(skb, fh);
frag_id = fh->identification;
} else
/*
* Put this fragment into the sending queue.
*/
-
- IP6_INC_STATS(IPSTATS_MIB_FRAGCREATES);
-
err = output(frag);
if (err)
goto fail;
+
+ IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGCREATES);
}
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_FRAGOKS);
kfree_skb(skb);
- IP6_INC_STATS(IPSTATS_MIB_FRAGOKS);
return err;
fail:
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_FRAGFAILS);
kfree_skb(skb);
- IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
return err;
}
-int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl)
+static inline int ip6_rt_check(struct rt6key *rt_key,
+ struct in6_addr *fl_addr,
+ struct in6_addr *addr_cache)
{
- int err = 0;
+ return ((rt_key->plen != 128 || !ipv6_addr_equal(fl_addr, &rt_key->addr)) &&
+ (addr_cache == NULL || !ipv6_addr_equal(fl_addr, addr_cache)));
+}
- *dst = NULL;
- if (sk) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- *dst = sk_dst_check(sk, np->dst_cookie);
- if (*dst) {
- struct rt6_info *rt = (struct rt6_info*)*dst;
-
- /* Yes, checking route validity in not connected
- case is not very simple. Take into account,
- that we do not support routing by source, TOS,
- and MSG_DONTROUTE --ANK (980726)
-
- 1. If route was host route, check that
- cached destination is current.
- If it is network route, we still may
- check its validity using saved pointer
- to the last used address: daddr_cache.
- We do not want to save whole address now,
- (because main consumer of this service
- is tcp, which has not this problem),
- so that the last trick works only on connected
- sockets.
- 2. oif also should be the same.
- */
-
- if (((rt->rt6i_dst.plen != 128 ||
- !ipv6_addr_equal(&fl->fl6_dst, &rt->rt6i_dst.addr))
- && (np->daddr_cache == NULL ||
- !ipv6_addr_equal(&fl->fl6_dst, np->daddr_cache)))
- || (fl->oif && fl->oif != (*dst)->dev->ifindex)) {
- dst_release(*dst);
- *dst = NULL;
- }
- }
+static struct dst_entry *ip6_sk_dst_check(struct sock *sk,
+ struct dst_entry *dst,
+ struct flowi *fl)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct rt6_info *rt = (struct rt6_info *)dst;
+
+ if (!dst)
+ goto out;
+
+ /* Yes, checking route validity in not connected
+ * case is not very simple. Take into account,
+ * that we do not support routing by source, TOS,
+ * and MSG_DONTROUTE --ANK (980726)
+ *
+ * 1. ip6_rt_check(): If route was host route,
+ * check that cached destination is current.
+ * If it is network route, we still may
+ * check its validity using saved pointer
+ * to the last used address: daddr_cache.
+ * We do not want to save whole address now,
+ * (because main consumer of this service
+ * is tcp, which has not this problem),
+ * so that the last trick works only on connected
+ * sockets.
+ * 2. oif also should be the same.
+ */
+ if (ip6_rt_check(&rt->rt6i_dst, &fl->fl6_dst, np->daddr_cache) ||
+#ifdef CONFIG_IPV6_SUBTREES
+ ip6_rt_check(&rt->rt6i_src, &fl->fl6_src, np->saddr_cache) ||
+#endif
+ (fl->oif && fl->oif != dst->dev->ifindex)) {
+ dst_release(dst);
+ dst = NULL;
}
+out:
+ return dst;
+}
+
+static int ip6_dst_lookup_tail(struct sock *sk,
+ struct dst_entry **dst, struct flowi *fl)
+{
+ int err;
+
if (*dst == NULL)
*dst = ip6_route_output(sk, fl);
goto out_err_release;
if (ipv6_addr_any(&fl->fl6_src)) {
- err = ipv6_get_saddr(*dst, &fl->fl6_dst, &fl->fl6_src);
+ err = ipv6_get_saddr(*dst, &fl->fl6_dst, &fl->fl6_src, sk->sk_nx_info);
- if (err) {
-#if IP6_DEBUG >= 2
- printk(KERN_DEBUG "ip6_dst_lookup: "
- "no available source address\n");
-#endif
+ if (err)
goto out_err_release;
- }
}
return 0;
return err;
}
-int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
- void *from, int length, int transhdrlen,
- int hlimit, struct ipv6_txoptions *opt, struct flowi *fl, struct rt6_info *rt,
- unsigned int flags)
+/**
+ * ip6_dst_lookup - perform route lookup on flow
+ * @sk: socket which provides route info
+ * @dst: pointer to dst_entry * for result
+ * @fl: flow to lookup
+ *
+ * This function performs a route lookup on the given flow.
+ *
+ * It returns zero on success, or a standard errno code on error.
+ */
+int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl)
+{
+ *dst = NULL;
+ return ip6_dst_lookup_tail(sk, dst, fl);
+}
+EXPORT_SYMBOL_GPL(ip6_dst_lookup);
+
+/**
+ * ip6_sk_dst_lookup - perform socket cached route lookup on flow
+ * @sk: socket which provides the dst cache and route info
+ * @dst: pointer to dst_entry * for result
+ * @fl: flow to lookup
+ *
+ * This function performs a route lookup on the given flow with the
+ * possibility of using the cached route in the socket if it is valid.
+ * It will take the socket dst lock when operating on the dst cache.
+ * As a result, this function can only be used in process context.
+ *
+ * It returns zero on success, or a standard errno code on error.
+ */
+int ip6_sk_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl)
+{
+ *dst = NULL;
+ if (sk) {
+ *dst = sk_dst_check(sk, inet6_sk(sk)->dst_cookie);
+ *dst = ip6_sk_dst_check(sk, *dst, fl);
+ }
+
+ return ip6_dst_lookup_tail(sk, dst, fl);
+}
+EXPORT_SYMBOL_GPL(ip6_sk_dst_lookup);
+
+static inline int ip6_ufo_append_data(struct sock *sk,
+ int getfrag(void *from, char *to, int offset, int len,
+ int odd, struct sk_buff *skb),
+ void *from, int length, int hh_len, int fragheaderlen,
+ int transhdrlen, int mtu,unsigned int flags)
+
+{
+ struct sk_buff *skb;
+ int err;
+
+ /* There is support for UDP large send offload by network
+ * device, so create one single skb packet containing complete
+ * udp datagram
+ */
+ if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL) {
+ skb = sock_alloc_send_skb(sk,
+ hh_len + fragheaderlen + transhdrlen + 20,
+ (flags & MSG_DONTWAIT), &err);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ /* reserve space for Hardware header */
+ skb_reserve(skb, hh_len);
+
+ /* create space for UDP/IP header */
+ skb_put(skb,fragheaderlen + transhdrlen);
+
+ /* initialize network header pointer */
+ skb->nh.raw = skb->data;
+
+ /* initialize protocol header pointer */
+ skb->h.raw = skb->data + fragheaderlen;
+
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum = 0;
+ sk->sk_sndmsg_off = 0;
+ }
+
+ err = skb_append_datato_frags(sk,skb, getfrag, from,
+ (length - transhdrlen));
+ if (!err) {
+ struct frag_hdr fhdr;
+
+ /* specify the length of each IP datagram fragment*/
+ skb_shinfo(skb)->gso_size = mtu - fragheaderlen -
+ sizeof(struct frag_hdr);
+ skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
+ ipv6_select_ident(skb, &fhdr);
+ skb_shinfo(skb)->ip6_frag_id = fhdr.identification;
+ __skb_queue_tail(&sk->sk_write_queue, skb);
+
+ return 0;
+ }
+ /* There is not enough support do UPD LSO,
+ * so follow normal path
+ */
+ kfree_skb(skb);
+
+ return err;
+}
+
+int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
+ int offset, int len, int odd, struct sk_buff *skb),
+ void *from, int length, int transhdrlen,
+ int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi *fl,
+ struct rt6_info *rt, unsigned int flags)
{
- struct inet_opt *inet = inet_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
unsigned int maxfraglen, fragheaderlen;
np->cork.rt = rt;
inet->cork.fl = *fl;
np->cork.hop_limit = hlimit;
- inet->cork.fragsize = mtu = dst_pmtu(&rt->u.dst);
+ np->cork.tclass = tclass;
+ mtu = dst_mtu(rt->u.dst.path);
+ if (np->frag_size < mtu) {
+ if (np->frag_size)
+ mtu = np->frag_size;
+ }
+ inet->cork.fragsize = mtu;
+ if (dst_allfrag(rt->u.dst.path))
+ inet->cork.flags |= IPCORK_ALLFRAG;
inet->cork.length = 0;
sk->sk_sndmsg_page = NULL;
sk->sk_sndmsg_off = 0;
hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
- fragheaderlen = sizeof(struct ipv6hdr) + (opt ? opt->opt_nflen : 0);
+ fragheaderlen = sizeof(struct ipv6hdr) + rt->u.dst.nfheader_len + (opt ? opt->opt_nflen : 0);
maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen - sizeof(struct frag_hdr);
if (mtu <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {
*/
inet->cork.length += length;
+ if (((length > mtu) && (sk->sk_protocol == IPPROTO_UDP)) &&
+ (rt->u.dst.dev->features & NETIF_F_UFO)) {
+
+ err = ip6_ufo_append_data(sk, getfrag, from, length, hh_len,
+ fragheaderlen, transhdrlen, mtu,
+ flags);
+ if (err)
+ goto error;
+ return 0;
+ }
if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL)
goto alloc_new_skb;
while (length > 0) {
/* Check if the remaining data fits into current packet. */
- copy = mtu - skb->len;
+ copy = (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - skb->len;
if (copy < length)
copy = maxfraglen - skb->len;
* we know we need more fragment(s).
*/
datalen = length + fraggap;
- if (datalen > mtu - fragheaderlen)
+ if (datalen > (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - fragheaderlen)
datalen = maxfraglen - fragheaderlen;
fraglen = datalen + fragheaderlen;
skb_prev->csum = csum_sub(skb_prev->csum,
skb->csum);
data += fraggap;
- skb_trim(skb_prev, maxfraglen);
+ pskb_trim_unique(skb_prev, maxfraglen);
}
copy = datalen - transhdrlen - fraggap;
if (copy < 0) {
return 0;
error:
inet->cork.length -= length;
- IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
return err;
}
struct sk_buff *skb, *tmp_skb;
struct sk_buff **tail_skb;
struct in6_addr final_dst_buf, *final_dst = &final_dst_buf;
- struct inet_opt *inet = inet_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct ipv6hdr *hdr;
struct ipv6_txoptions *opt = np->cork.opt;
tail_skb = &(tmp_skb->next);
skb->len += tmp_skb->len;
skb->data_len += tmp_skb->len;
-#if 0 /* Logically correct, but useless work, ip_fragment() will have to undo */
skb->truesize += tmp_skb->truesize;
__sock_put(tmp_skb->sk);
tmp_skb->destructor = NULL;
tmp_skb->sk = NULL;
-#endif
}
ipv6_addr_copy(final_dst, &fl->fl6_dst);
skb->nh.ipv6h = hdr = (struct ipv6hdr*) skb_push(skb, sizeof(struct ipv6hdr));
- *(u32*)hdr = fl->fl6_flowlabel | htonl(0x60000000);
+ *(__be32*)hdr = fl->fl6_flowlabel |
+ htonl(0x60000000 | ((int)np->cork.tclass << 20));
if (skb->len <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN)
hdr->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
ipv6_addr_copy(&hdr->saddr, &fl->fl6_src);
ipv6_addr_copy(&hdr->daddr, final_dst);
+ skb->priority = sk->sk_priority;
+
skb->dst = dst_clone(&rt->u.dst);
- IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
+ IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dst->dev, dst_output);
if (err) {
if (err > 0)
- err = inet->recverr ? net_xmit_errno(err) : 0;
+ err = np->recverr ? net_xmit_errno(err) : 0;
if (err)
goto error;
}
out:
inet->cork.flags &= ~IPCORK_OPT;
- if (np->cork.opt) {
- kfree(np->cork.opt);
- np->cork.opt = NULL;
- }
+ kfree(np->cork.opt);
+ np->cork.opt = NULL;
if (np->cork.rt) {
dst_release(&np->cork.rt->u.dst);
np->cork.rt = NULL;
+ inet->cork.flags &= ~IPCORK_ALLFRAG;
}
memset(&inet->cork.fl, 0, sizeof(inet->cork.fl));
return err;
void ip6_flush_pending_frames(struct sock *sk)
{
- struct inet_opt *inet = inet_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
while ((skb = __skb_dequeue_tail(&sk->sk_write_queue)) != NULL) {
- IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ IP6_INC_STATS(ip6_dst_idev(skb->dst),
+ IPSTATS_MIB_OUTDISCARDS);
kfree_skb(skb);
}
inet->cork.flags &= ~IPCORK_OPT;
- if (np->cork.opt) {
- kfree(np->cork.opt);
- np->cork.opt = NULL;
- }
+ kfree(np->cork.opt);
+ np->cork.opt = NULL;
if (np->cork.rt) {
dst_release(&np->cork.rt->u.dst);
np->cork.rt = NULL;
+ inet->cork.flags &= ~IPCORK_ALLFRAG;
}
memset(&inet->cork.fl, 0, sizeof(inet->cork.fl));
}