[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>

1 files changed, 11 insertions, 3 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index e527a1652d7c..2ad37893334a 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -655,6 +655,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
         struct flowi fl;
         int addr_len = msg->msg_namelen;
         int hlimit = -1;
+        int tclass = -1;
         u16 proto;
         int err;
 
@@ -740,7 +741,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
                 memset(opt, 0, sizeof(struct ipv6_txoptions));
                 opt->tot_len = sizeof(struct ipv6_txoptions);
 
-                err = datagram_send_ctl(msg, &fl, opt, &hlimit);
+                err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
                 if (err < 0) {
                         fl6_sock_release(flowlabel);
                         return err;
@@ -797,6 +798,12 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
                         hlimit = ipv6_get_hoplimit(dst->dev);
         }
 
+        if (tclass < 0) {
+                tclass = np->cork.tclass;
+                if (tclass < 0)
+                        tclass = 0;
+        }
+
         if (msg->msg_flags&MSG_CONFIRM)
                 goto do_confirm;
 
@@ -805,8 +812,9 @@ back_from_confirm:
                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
         } else {
                 lock_sock(sk);
-                err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
-                                        hlimit, opt, &fl, (struct rt6_info*)dst, msg->msg_flags);
+                err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
+                        len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
+                        msg->msg_flags);
 
                 if (err)
                         ip6_flush_pending_frames(sk);