[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>

4 files changed, 6 insertions, 4 deletions

diff --git a/include/linux/in6.h b/include/linux/in6.h
index c11022f2f2ac..bd32b79d6295 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -219,9 +219,7 @@ struct in6_flowlabel_req
 #define IPV6_DSTOPTS            63
 #define IPV6_RECVHOPLIMIT       64
 #define IPV6_HOPLIMIT           65
-#if 0
 #define IPV6_RECVTCLASS         66
 #define IPV6_TCLASS             67
-#endif
 
 #endif
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 2581f1c94df5..6c5f7b39a4b0 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -245,7 +245,8 @@ struct ipv6_pinfo {
                                 ohopopts:1,
                                 dstopts:1,
                                 odstopts:1,
-                                rxflow:1;
+                                rxflow:1,
+                                rxtclass:1;
                 } bits;
                 __u16           all;
         } rxopt;
@@ -256,6 +257,7 @@ struct ipv6_pinfo {
                                 sndflow:1,
                                 pmtudisc:2,
                                 ipv6only:1;
+        __u8                    tclass;
 
         __u32                   dst_cookie;
 
@@ -269,6 +271,7 @@ struct ipv6_pinfo {
                 struct ipv6_txoptions *opt;
                 struct rt6_info *rt;
                 int hop_limit;
+                int tclass;
         } cork;
 };
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 8a9fe9434e94..65ec86678a08 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -377,6 +377,7 @@ extern int			ip6_append_data(struct sock *sk,
                                                 int length,
                                                 int transhdrlen,
                                                 int hlimit,
+                                                int tclass,
                                                 struct ipv6_txoptions *opt,
                                                 struct flowi *fl,
                                                 struct rt6_info *rt,
diff --git a/include/net/transp_v6.h b/include/net/transp_v6.h
index 8b075ab7a26c..4e86f2de6638 100644
--- a/include/net/transp_v6.h
+++ b/include/net/transp_v6.h
@@ -37,7 +37,7 @@ extern int			datagram_recv_ctl(struct sock *sk,
 extern int                      datagram_send_ctl(struct msghdr *msg,
                                                   struct flowi *fl,
                                                   struct ipv6_txoptions *opt,
-                                                  int *hlimit);
+                                                  int *hlimit, int *tclass);
 
 #define         LOOPBACK4_IPV6          __constant_htonl(0x7f000006)