[PATCH net-next] ipv6: add IPV6_HDRINCL option for raw sockets

[Hannes Frederic Sowa]

Same as in Windows, we miss IPV6_HDRINCL for SOL_IPV6 and SOL_RAW.
The SOL_IP/IP_HDRINCL is not available for IPv6 sockets.

Signed-off-by: Hannes Frederic Sowa <han...@stressinduktion.org>
---
 include/uapi/linux/in6.h |  1 +
 net/ipv6/raw.c           | 20 ++++++++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
index 79b12b004ade03..318a4828bf98c2 100644
--- a/include/uapi/linux/in6.h
+++ b/include/uapi/linux/in6.h
@@ -196,6 +196,7 @@ struct in6_flowlabel_req {
 
 #define IPV6_IPSEC_POLICY      34
 #define IPV6_XFRM_POLICY       35
+#define IPV6_HDRINCL           36
 #endif
 
 /*
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 99140986e88716..fa59dd7a427e88 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -972,6 +972,11 @@ static int do_rawv6_setsockopt(struct sock *sk, int level, 
int optname,
                return -EFAULT;
 
        switch (optname) {
+       case IPV6_HDRINCL:
+               if (sk->sk_type != SOCK_RAW)
+                       return -EINVAL;
+               inet_sk(sk)->hdrincl = !!val;
+               return 0;
        case IPV6_CHECKSUM:
                if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
                    level == IPPROTO_IPV6) {
@@ -1016,7 +1021,8 @@ static int rawv6_setsockopt(struct sock *sk, int level, 
int optname,
                        return -EOPNOTSUPP;
                return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
        case SOL_IPV6:
-               if (optname == IPV6_CHECKSUM)
+               if (optname == IPV6_CHECKSUM ||
+                   optname == IPV6_HDRINCL)
                        break;
        default:
                return ipv6_setsockopt(sk, level, optname, optval, optlen);
@@ -1037,7 +1043,8 @@ static int compat_rawv6_setsockopt(struct sock *sk, int 
level, int optname,
                        return -EOPNOTSUPP;
                return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
        case SOL_IPV6:
-               if (optname == IPV6_CHECKSUM)
+               if (optname == IPV6_CHECKSUM ||
+                   optname == IPV6_HDRINCL)
                        break;
        default:
                return compat_ipv6_setsockopt(sk, level, optname,
@@ -1057,6 +1064,9 @@ static int do_rawv6_getsockopt(struct sock *sk, int 
level, int optname,
                return -EFAULT;
 
        switch (optname) {
+       case IPV6_HDRINCL:
+               val = inet_sk(sk)->hdrincl;
+               break;
        case IPV6_CHECKSUM:
                /*
                 * We allow getsockopt() for IPPROTO_IPV6-level
@@ -1094,7 +1104,8 @@ static int rawv6_getsockopt(struct sock *sk, int level, 
int optname,
                        return -EOPNOTSUPP;
                return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
        case SOL_IPV6:
-               if (optname == IPV6_CHECKSUM)
+               if (optname == IPV6_CHECKSUM ||
+                   optname == IPV6_HDRINCL)
                        break;
        default:
                return ipv6_getsockopt(sk, level, optname, optval, optlen);
@@ -1115,7 +1126,8 @@ static int compat_rawv6_getsockopt(struct sock *sk, int 
level, int optname,
                        return -EOPNOTSUPP;
                return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
        case SOL_IPV6:
-               if (optname == IPV6_CHECKSUM)
+               if (optname == IPV6_CHECKSUM ||
+                   optname == IPV6_HDRINCL)
                        break;
        default:
                return compat_ipv6_getsockopt(sk, level, optname,
-- 
2.5.0

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