[IPV6] MIP6: Add sending mobility header functions through raw socket.

Mobility header is built by user-space and sent through raw socket.
Kernel just extracts its type to flow.
Based on MIPL2 kernel patch.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ecca8aae3c4b..d09329ca3267 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -609,6 +609,9 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
         struct iovec *iov;
         u8 __user *type = NULL;
         u8 __user *code = NULL;
+#ifdef CONFIG_IPV6_MIP6
+        u8 len = 0;
+#endif
         int probed = 0;
         int i;
 
@@ -640,6 +643,20 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
                                 probed = 1;
                         }
                         break;
+#ifdef CONFIG_IPV6_MIP6
+                case IPPROTO_MH:
+                        if (iov->iov_base && iov->iov_len < 1)
+                                break;
+                        /* check if type field is readable or not. */
+                        if (iov->iov_len > 2 - len) {
+                                u8 __user *p = iov->iov_base;
+                                get_user(fl->fl_mh_type, &p[2 - len]);
+                                probed = 1;
+                        } else
+                                len += iov->iov_len;
+
+                        break;
+#endif
                 default:
                         probed = 1;
                         break;