security/selinux/include/xfrm.h

   1 /*
   2  * SELinux support for the XFRM LSM hooks
   3  *
   4  * Author : Trent Jaeger, <jaegert@us.ibm.com>
   5  */
   6 #ifndef _SELINUX_XFRM_H_
   7 #define _SELINUX_XFRM_H_
   8
   9 int selinux_xfrm_policy_alloc(struct xfrm_policy *xp, struct xfrm_user_sec_ctx *sec_ctx);
  10 int selinux_xfrm_policy_clone(struct xfrm_policy *old, struct xfrm_policy *new);
  11 void selinux_xfrm_policy_free(struct xfrm_policy *xp);
  12 int selinux_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx);
  13 void selinux_xfrm_state_free(struct xfrm_state *x);
  14 int selinux_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir);
  15
  16 /*
  17  * Extract the security blob from the sock (it's actually on the socket)
  18  */
  19 static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
  20 {
  21         if (!sk->sk_socket)
  22                 return NULL;
  23
  24         return SOCK_INODE(sk->sk_socket)->i_security;
  25 }
  26
  27
  28 static inline u32 selinux_no_sk_sid(struct flowi *fl)
  29 {
  30         /* NOTE: no sock occurs on ICMP reply, forwards, ... */
  31         /* icmp_reply: authorize as kernel packet */
  32         if (fl && fl->proto == IPPROTO_ICMP) {
  33                 return SECINITSID_KERNEL;
  34         }
  35
  36         return SECINITSID_ANY_SOCKET;
  37 }
  38
  39 #ifdef CONFIG_SECURITY_NETWORK_XFRM
  40 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb);
  41 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb);
  42 u32 selinux_socket_getpeer_stream(struct sock *sk);
  43 u32 selinux_socket_getpeer_dgram(struct sk_buff *skb);
  44 #else
  45 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb)
  46 {
  47         return 0;
  48 }
  49
  50 static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb)
  51 {
  52         return NF_ACCEPT;
  53 }
  54
  55 static inline int selinux_socket_getpeer_stream(struct sock *sk)
  56 {
  57         return SECSID_NULL;
  58 }
  59
  60 static inline int selinux_socket_getpeer_dgram(struct sk_buff *skb)
  61 {
  62         return SECSID_NULL;
  63 }
  64 #endif
  65
  66 #endif /* _SELINUX_XFRM_H_ */