/*
* IPv6 output functions
- * Linux INET6 implementation
+ * Linux INET6 implementation
*
* Authors:
- * Pedro Roque <roque@di.fc.ul.pt>
+ * Pedro Roque <roque@di.fc.ul.pt>
*
* $Id: ip6_output.c,v 1.34 2002/02/01 22:01:04 davem Exp $
*
/* dev_loopback_xmit for use with netfilter. */
static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
{
- newskb->mac.raw = newskb->data;
- __skb_pull(newskb, newskb->nh.raw - newskb->data);
+ skb_reset_mac_header(newskb);
+ __skb_pull(newskb, skb_network_offset(newskb));
newskb->pkt_type = PACKET_LOOPBACK;
newskb->ip_summed = CHECKSUM_UNNECESSARY;
BUG_TRAP(newskb->dst);
ipv6_push_nfrag_opts(skb, opt, &proto, &first_hop);
}
- hdr = skb->nh.ipv6h = (struct ipv6hdr*)skb_push(skb, sizeof(struct ipv6hdr));
+ skb_push(skb, sizeof(struct ipv6hdr));
+ skb_reset_network_header(skb);
+ hdr = skb->nh.ipv6h;
/*
* Fill in the IPv6 header
return -EMSGSIZE;
}
+EXPORT_SYMBOL(ip6_xmit);
+
/*
* To avoid extra problems ND packets are send through this
* routine. It's code duplication but I really want to avoid
struct dst_entry *dst = skb->dst;
struct ipv6hdr *hdr = skb->nh.ipv6h;
struct inet6_skb_parm *opt = IP6CB(skb);
-
+
if (ipv6_devconf.forwarding == 0)
goto error;
hdr = skb->nh.ipv6h;
/* Mangling hops number delayed to point after skb COW */
-
+
hdr->hop_limit--;
IP6_INC_STATS_BH(ip6_dst_idev(dst), IPSTATS_MIB_OUTFORWDATAGRAMS);
__skb_pull(skb, hlen);
fh = (struct frag_hdr*)__skb_push(skb, sizeof(struct frag_hdr));
- skb->nh.raw = __skb_push(skb, hlen);
+ __skb_push(skb, hlen);
+ skb_reset_network_header(skb);
memcpy(skb->nh.raw, tmp_hdr, hlen);
ipv6_select_ident(skb, fh);
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);
+ __skb_push(frag, hlen);
+ skb_reset_network_header(frag);
memcpy(frag->nh.raw, tmp_hdr, hlen);
offset += skb->len - hlen - sizeof(struct frag_hdr);
fh->nexthdr = nexthdr;
frag->nh.ipv6h->payload_len = htons(frag->len - sizeof(struct ipv6hdr));
ip6_copy_metadata(frag, skb);
}
-
+
err = output(skb);
if(!err)
IP6_INC_STATS(ip6_dst_idev(&rt->u.dst), IPSTATS_MIB_FRAGCREATES);
ip6_copy_metadata(frag, skb);
skb_reserve(frag, LL_RESERVED_SPACE(rt->u.dst.dev));
skb_put(frag, len + hlen + sizeof(struct frag_hdr));
- frag->nh.raw = frag->data;
+ skb_reset_network_header(frag);
fh = (struct frag_hdr*)(frag->data + hlen);
frag->h.raw = frag->data + hlen + sizeof(struct frag_hdr);
fail:
IP6_INC_STATS(ip6_dst_idev(skb->dst),
IPSTATS_MIB_FRAGFAILS);
- kfree_skb(skb);
+ kfree_skb(skb);
return err;
}
goto out_err_release;
}
+#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
+ /*
+ * Here if the dst entry we've looked up
+ * has a neighbour entry that is in the INCOMPLETE
+ * state and the src address from the flow is
+ * marked as OPTIMISTIC, we release the found
+ * dst entry and replace it instead with the
+ * dst entry of the nexthop router
+ */
+ if (!((*dst)->neighbour->nud_state & NUD_VALID)) {
+ struct inet6_ifaddr *ifp;
+ struct flowi fl_gw;
+ int redirect;
+
+ ifp = ipv6_get_ifaddr(&fl->fl6_src, (*dst)->dev, 1);
+
+ redirect = (ifp && ifp->flags & IFA_F_OPTIMISTIC);
+ if (ifp)
+ in6_ifa_put(ifp);
+
+ if (redirect) {
+ /*
+ * We need to get the dst entry for the
+ * default router instead
+ */
+ dst_release(*dst);
+ memcpy(&fl_gw, fl, sizeof(struct flowi));
+ memset(&fl_gw.fl6_dst, 0, sizeof(struct in6_addr));
+ *dst = ip6_route_output(sk, &fl_gw);
+ if ((err = (*dst)->error))
+ goto out_err_release;
+ }
+ }
+#endif
+
return 0;
out_err_release:
skb_put(skb,fragheaderlen + transhdrlen);
/* initialize network header pointer */
- skb->nh.raw = skb->data;
+ skb_reset_network_header(skb);
/* initialize protocol header pointer */
skb->h.raw = skb->data + fragheaderlen;
struct frag_hdr fhdr;
/* specify the length of each IP datagram fragment*/
- skb_shinfo(skb)->gso_size = mtu - fragheaderlen -
+ skb_shinfo(skb)->gso_size = mtu - fragheaderlen -
sizeof(struct frag_hdr);
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
ipv6_select_ident(skb, &fhdr);
* fragment alignment (= 8-15 octects, in total).
*
* Note that we may need to "move" the data from the tail of
- * of the buffer to the new fragment when we split
+ * of the buffer to the new fragment when we split
* the message.
*
- * FIXME: It may be fragmented into multiple chunks
+ * FIXME: It may be fragmented into multiple chunks
* at once if non-fragmentable extension headers
* are too large.
- * --yoshfuji
+ * --yoshfuji
*/
inet->cork.length += length;
/*
* We just reserve space for fragment header.
- * Note: this may be overallocation if the message
+ * Note: this may be overallocation if the message
* (without MSG_MORE) fits into the MTU.
*/
alloclen += sizeof(struct frag_hdr);
/* move skb->data to ip header from ext header */
if (skb->data < skb->nh.raw)
- __skb_pull(skb, skb->nh.raw - skb->data);
+ __skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) {
__skb_pull(tmp_skb, skb->h.raw - skb->nh.raw);
*tail_skb = tmp_skb;
if (opt && opt->opt_nflen)
ipv6_push_nfrag_opts(skb, opt, &proto, &final_dst);
- skb->nh.ipv6h = hdr = (struct ipv6hdr*) skb_push(skb, sizeof(struct ipv6hdr));
-
+ skb_push(skb, sizeof(struct ipv6hdr));
+ skb_reset_network_header(skb);
+ hdr = skb->nh.ipv6h;
+
*(__be32*)hdr = fl->fl6_flowlabel |
htonl(0x60000000 | ((int)np->cork.tclass << 20));
projects / powerpc.git / blobdiff