[IPV6]: Support IPV6_{RECV,}TCLASS socket options / ancillary data.
Based on patch from David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 01ef94f..2f589f2 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -166,7 +166,7 @@
struct ipv6hdr *hdr;
u8 proto = fl->proto;
int seg_len = skb->len;
- int hlimit;
+ int hlimit, tclass;
u32 mtu;
if (opt) {
@@ -202,7 +202,6 @@
* Fill in the IPv6 header
*/
- *(u32*)hdr = htonl(0x60000000) | fl->fl6_flowlabel;
hlimit = -1;
if (np)
hlimit = np->hop_limit;
@@ -211,6 +210,14 @@
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
+ tclass = -1;
+ if (np)
+ tclass = np->tclass;
+ if (tclass < 0)
+ tclass = 0;
+
+ *(u32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl->fl6_flowlabel;
+
hdr->payload_len = htons(seg_len);
hdr->nexthdr = proto;
hdr->hop_limit = hlimit;
@@ -762,10 +769,11 @@
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)
+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_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
@@ -803,6 +811,7 @@
np->cork.rt = rt;
inet->cork.fl = *fl;
np->cork.hop_limit = hlimit;
+ np->cork.tclass = tclass;
inet->cork.fragsize = mtu = dst_mtu(rt->u.dst.path);
if (dst_allfrag(rt->u.dst.path))
inet->cork.flags |= IPCORK_ALLFRAG;
@@ -1084,7 +1093,8 @@
skb->nh.ipv6h = hdr = (struct ipv6hdr*) skb_push(skb, sizeof(struct ipv6hdr));
- *(u32*)hdr = fl->fl6_flowlabel | htonl(0x60000000);
+ *(u32*)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));
