[SELinux]: Add support for DCCP

This patch implements SELinux kernel support for DCCP
(http://linux-net.osdl.org/index.php/DCCP), which is similar in
operation to TCP in terms of connected state between peers.

The SELinux support for DCCP is thus modeled on existing handling of
TCP.

A new DCCP socket class is introduced, to allow protocol
differentation.  The permissions for this class inherit all of the
socket permissions, as well as the current TCP permissions (node_bind,
name_bind etc). IPv4 and IPv6 are supported, although labeled
networking is not, at this stage.

Patches for SELinux userspace are at:
http://people.redhat.com/jmorris/selinux/dccp/user/

I've performed some basic testing, and it seems to be working as
expected.  Adding policy support is similar to TCP, the only real
difference being that it's a different protocol.

Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 45 insertions, 0 deletions

diff --git a/security/selinux/include/av_inherit.h b/security/selinux/include/av_inherit.h
index a68fdd5..8377a4b 100644
--- a/security/selinux/include/av_inherit.h
+++ b/security/selinux/include/av_inherit.h
@@ -30,3 +30,4 @@
    S_(SECCLASS_NETLINK_DNRT_SOCKET, socket, 0x00400000UL)
    S_(SECCLASS_NETLINK_KOBJECT_UEVENT_SOCKET, socket, 0x00400000UL)
    S_(SECCLASS_APPLETALK_SOCKET, socket, 0x00400000UL)
+   S_(SECCLASS_DCCP_SOCKET, socket, 0x00400000UL)
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index 09fc8a2..ad9fb2d 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -35,12 +35,16 @@
    S_(SECCLASS_NODE, NODE__RAWIP_RECV, "rawip_recv")
    S_(SECCLASS_NODE, NODE__RAWIP_SEND, "rawip_send")
    S_(SECCLASS_NODE, NODE__ENFORCE_DEST, "enforce_dest")
+   S_(SECCLASS_NODE, NODE__DCCP_RECV, "dccp_recv")
+   S_(SECCLASS_NODE, NODE__DCCP_SEND, "dccp_send")
    S_(SECCLASS_NETIF, NETIF__TCP_RECV, "tcp_recv")
    S_(SECCLASS_NETIF, NETIF__TCP_SEND, "tcp_send")
    S_(SECCLASS_NETIF, NETIF__UDP_RECV, "udp_recv")
    S_(SECCLASS_NETIF, NETIF__UDP_SEND, "udp_send")
    S_(SECCLASS_NETIF, NETIF__RAWIP_RECV, "rawip_recv")
    S_(SECCLASS_NETIF, NETIF__RAWIP_SEND, "rawip_send")
+   S_(SECCLASS_NETIF, NETIF__DCCP_RECV, "dccp_recv")
+   S_(SECCLASS_NETIF, NETIF__DCCP_SEND, "dccp_send")
    S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__CONNECTTO, "connectto")
    S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__NEWCONN, "newconn")
    S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__ACCEPTFROM, "acceptfrom")
@@ -252,3 +256,7 @@
    S_(SECCLASS_KEY, KEY__LINK, "link")
    S_(SECCLASS_KEY, KEY__SETATTR, "setattr")
    S_(SECCLASS_KEY, KEY__CREATE, "create")
+   S_(SECCLASS_CONTEXT, CONTEXT__TRANSLATE, "translate")
+   S_(SECCLASS_CONTEXT, CONTEXT__CONTAINS, "contains")
+   S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NODE_BIND, "node_bind")
+   S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NAME_CONNECT, "name_connect")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index 81f4f52..2de4b5f 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -312,6 +312,8 @@
 #define NODE__RAWIP_RECV                          0x00000010UL
 #define NODE__RAWIP_SEND                          0x00000020UL
 #define NODE__ENFORCE_DEST                        0x00000040UL
+#define NODE__DCCP_RECV                           0x00000080UL
+#define NODE__DCCP_SEND                           0x00000100UL
 
 #define NETIF__TCP_RECV                           0x00000001UL
 #define NETIF__TCP_SEND                           0x00000002UL
@@ -319,6 +321,8 @@
 #define NETIF__UDP_SEND                           0x00000008UL
 #define NETIF__RAWIP_RECV                         0x00000010UL
 #define NETIF__RAWIP_SEND                         0x00000020UL
+#define NETIF__DCCP_RECV                          0x00000040UL
+#define NETIF__DCCP_SEND                          0x00000080UL
 
 #define NETLINK_SOCKET__IOCTL                     0x00000001UL
 #define NETLINK_SOCKET__READ                      0x00000002UL
@@ -970,3 +974,31 @@
 #define KEY__LINK                                 0x00000010UL
 #define KEY__SETATTR                              0x00000020UL
 #define KEY__CREATE                               0x00000040UL
+
+#define CONTEXT__TRANSLATE                        0x00000001UL
+#define CONTEXT__CONTAINS                         0x00000002UL
+
+#define DCCP_SOCKET__IOCTL                        0x00000001UL
+#define DCCP_SOCKET__READ                         0x00000002UL
+#define DCCP_SOCKET__WRITE                        0x00000004UL
+#define DCCP_SOCKET__CREATE                       0x00000008UL
+#define DCCP_SOCKET__GETATTR                      0x00000010UL
+#define DCCP_SOCKET__SETATTR                      0x00000020UL
+#define DCCP_SOCKET__LOCK                         0x00000040UL
+#define DCCP_SOCKET__RELABELFROM                  0x00000080UL
+#define DCCP_SOCKET__RELABELTO                    0x00000100UL
+#define DCCP_SOCKET__APPEND                       0x00000200UL
+#define DCCP_SOCKET__BIND                         0x00000400UL
+#define DCCP_SOCKET__CONNECT                      0x00000800UL
+#define DCCP_SOCKET__LISTEN                       0x00001000UL
+#define DCCP_SOCKET__ACCEPT                       0x00002000UL
+#define DCCP_SOCKET__GETOPT                       0x00004000UL
+#define DCCP_SOCKET__SETOPT                       0x00008000UL
+#define DCCP_SOCKET__SHUTDOWN                     0x00010000UL
+#define DCCP_SOCKET__RECVFROM                     0x00020000UL
+#define DCCP_SOCKET__SENDTO                       0x00040000UL
+#define DCCP_SOCKET__RECV_MSG                     0x00080000UL
+#define DCCP_SOCKET__SEND_MSG                     0x00100000UL
+#define DCCP_SOCKET__NAME_BIND                    0x00200000UL
+#define DCCP_SOCKET__NODE_BIND                    0x00400000UL
+#define DCCP_SOCKET__NAME_CONNECT                 0x00800000UL
diff --git a/security/selinux/include/class_to_string.h b/security/selinux/include/class_to_string.h
index 24303b6..9f3ebb1 100644
--- a/security/selinux/include/class_to_string.h
+++ b/security/selinux/include/class_to_string.h
@@ -61,3 +61,5 @@
     S_("appletalk_socket")
     S_("packet")
     S_("key")
+    S_("context")
+    S_("dccp_socket")
diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h
index 95887ae..67cef37 100644
--- a/security/selinux/include/flask.h
+++ b/security/selinux/include/flask.h
@@ -63,6 +63,8 @@
 #define SECCLASS_APPLETALK_SOCKET                        56
 #define SECCLASS_PACKET                                  57
 #define SECCLASS_KEY                                     58
+#define SECCLASS_CONTEXT                                 59
+#define SECCLASS_DCCP_SOCKET                             60
 
 /*
  * Security identifier indices for initial entities