[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>

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ecca8aae3c4b28aaf4bb2bc60e89c23c781fe3ad..d09329ca32670bdb76639826bfdfa53be41f1ae0 100644 (file)
--- 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;