security/selinux/nlmsgtab.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Netlink message type permission tables, for user generated messages.
  *
  * Author: James Morris <jmorris@redhat.com>
  *
  * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
  */
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #include <linux/if.h>
 #include <linux/inet_diag.h>
 #include <linux/xfrm.h>
 #include <linux/audit.h>
 #include <linux/sock_diag.h>

 #include "flask.h"
 #include "av_permissions.h"
 #include "security.h"

 struct nlmsg_perm {
 	u16	nlmsg_type;
 	u32	perm;
 };

 static const struct nlmsg_perm nlmsg_route_perms[] =
 {
 	{ RTM_NEWLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETLINK,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_SETLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_NEWADDR,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELADDR,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETADDR,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWRULE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELRULE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETRULE,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWACTION,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELACTION,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETACTION,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWPREFIX,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETMULTICAST,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_GETANYCAST,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_GETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_SETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_NEWADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_GETDCB,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_SETDCB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_NEWNETCONF,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELNETCONF,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETNETCONF,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWMDB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELMDB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE  },
 	{ RTM_GETMDB,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWNSID,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELNSID,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_GETNSID,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWSTATS,		NETLINK_ROUTE_SOCKET__NLMSG_READ },
 	{ RTM_GETSTATS,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWCACHEREPORT,	NETLINK_ROUTE_SOCKET__NLMSG_READ },
 	{ RTM_NEWCHAIN,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELCHAIN,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETCHAIN,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWNEXTHOP,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELNEXTHOP,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETNEXTHOP,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWLINKPROP,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELLINKPROP,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_NEWVLAN,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELVLAN,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETVLAN,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_NEWNEXTHOPBUCKET,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_DELNEXTHOPBUCKET,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
 	{ RTM_GETNEXTHOPBUCKET,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 };

 static const struct nlmsg_perm nlmsg_tcpdiag_perms[] =
 {
 	{ TCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 	{ DCCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 	{ SOCK_DIAG_BY_FAMILY,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 	{ SOCK_DESTROY,		NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE },
 };

 static const struct nlmsg_perm nlmsg_xfrm_perms[] =
 {
 	{ XFRM_MSG_NEWSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_DELSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_GETSA,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_NEWPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_DELPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_GETPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_ALLOCSPI,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_ACQUIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_EXPIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_UPDPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_UPDSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_POLEXPIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_FLUSHSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_FLUSHPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_NEWAE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_GETAE,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_REPORT,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_MIGRATE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_NEWSADINFO,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_GETSADINFO,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_NEWSPDINFO,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_GETSPDINFO,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_MAPPING,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 	{ XFRM_MSG_SETDEFAULT,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
 	{ XFRM_MSG_GETDEFAULT,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
 };

 static const struct nlmsg_perm nlmsg_audit_perms[] =
 {
 	{ AUDIT_GET,		NETLINK_AUDIT_SOCKET__NLMSG_READ     },
 	{ AUDIT_SET,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_LIST,		NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
 	{ AUDIT_ADD,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_DEL,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_LIST_RULES,	NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
 	{ AUDIT_ADD_RULE,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_DEL_RULE,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_USER,		NETLINK_AUDIT_SOCKET__NLMSG_RELAY    },
 	{ AUDIT_SIGNAL_INFO,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
 	{ AUDIT_TRIM,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_MAKE_EQUIV,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_TTY_GET,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
 	{ AUDIT_TTY_SET,	NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT	},
 	{ AUDIT_GET_FEATURE,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
 	{ AUDIT_SET_FEATURE,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 };


 static int nlmsg_perm(u16 nlmsg_type, u32 *perm, const struct nlmsg_perm *tab, size_t tabsize)
 {
 	int i, err = -EINVAL;

 	for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
 		if (nlmsg_type == tab[i].nlmsg_type) {
 			*perm = tab[i].perm;
 			err = 0;
 			break;
 		}

 	return err;
 }

 int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
 {
 	int err = 0;

 	switch (sclass) {
 	case SECCLASS_NETLINK_ROUTE_SOCKET:
 		/* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3.
 		 * If the BUILD_BUG_ON() below fails you must update the
 		 * structures at the top of this file with the new mappings
 		 * before updating the BUILD_BUG_ON() macro!
 		 */
 		BUILD_BUG_ON(RTM_MAX != (RTM_NEWNEXTHOPBUCKET + 3));
 		err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
 				 sizeof(nlmsg_route_perms));
 		break;

 	case SECCLASS_NETLINK_TCPDIAG_SOCKET:
 		err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
 				 sizeof(nlmsg_tcpdiag_perms));
 		break;

 	case SECCLASS_NETLINK_XFRM_SOCKET:
 		/* If the BUILD_BUG_ON() below fails you must update the
 		 * structures at the top of this file with the new mappings
 		 * before updating the BUILD_BUG_ON() macro!
 		 */
 		BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_GETDEFAULT);
 		err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
 				 sizeof(nlmsg_xfrm_perms));
 		break;

 	case SECCLASS_NETLINK_AUDIT_SOCKET:
 		if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
 		     nlmsg_type <= AUDIT_LAST_USER_MSG) ||
 		    (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
 		     nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
 			*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
 		} else {
 			err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
 					 sizeof(nlmsg_audit_perms));
 		}
 		break;

 	/* No messaging from userspace, or class unknown/unhandled */
 	default:
 		err = -ENOENT;
 		break;
 	}

 	return err;
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Netlink message type permission tables, for user generated messages.
	*
	* Author: James Morris <jmorris@redhat.com>
	*
	* Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
	*/
	#include <linux/types.h>
	#include <linux/kernel.h>
	#include <linux/netlink.h>
	#include <linux/rtnetlink.h>
	#include <linux/if.h>
	#include <linux/inet_diag.h>
	#include <linux/xfrm.h>
	#include <linux/audit.h>
	#include <linux/sock_diag.h>

	#include "flask.h"
	#include "av_permissions.h"
	#include "security.h"

	struct nlmsg_perm {
	u16 nlmsg_type;
	u32 perm;
	};

	static const struct nlmsg_perm nlmsg_route_perms[] =
	{
	{ RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWCACHEREPORT, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETVLAN, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	{ RTM_NEWNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	};

	static const struct nlmsg_perm nlmsg_tcpdiag_perms[] =
	{
	{ TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
	{ DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
	{ SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
	{ SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE },
	};

	static const struct nlmsg_perm nlmsg_xfrm_perms[] =
	{
	{ XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ },
	{ XFRM_MSG_SETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_READ },
	};

	static const struct nlmsg_perm nlmsg_audit_perms[] =
	{
	{ AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
	{ AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	{ AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	{ AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
	{ AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
	{ AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	{ AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
	{ AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
	{ AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
	{ AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	};


	static int nlmsg_perm(u16 nlmsg_type, u32 perm, const struct nlmsg_perm tab, size_t tabsize)
	{
	int i, err = -EINVAL;

	for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
	if (nlmsg_type == tab[i].nlmsg_type) {
	*perm = tab[i].perm;
	err = 0;
	break;
	}

	return err;
	}

	int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
	{
	int err = 0;

	switch (sclass) {
	case SECCLASS_NETLINK_ROUTE_SOCKET:
	/* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3.
	* If the BUILD_BUG_ON() below fails you must update the
	* structures at the top of this file with the new mappings
	* before updating the BUILD_BUG_ON() macro!
	*/
	BUILD_BUG_ON(RTM_MAX != (RTM_NEWNEXTHOPBUCKET + 3));
	err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
	sizeof(nlmsg_route_perms));
	break;

	case SECCLASS_NETLINK_TCPDIAG_SOCKET:
	err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
	sizeof(nlmsg_tcpdiag_perms));
	break;

	case SECCLASS_NETLINK_XFRM_SOCKET:
	/* If the BUILD_BUG_ON() below fails you must update the
	* structures at the top of this file with the new mappings
	* before updating the BUILD_BUG_ON() macro!
	*/
	BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_GETDEFAULT);
	err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
	sizeof(nlmsg_xfrm_perms));
	break;

	case SECCLASS_NETLINK_AUDIT_SOCKET:
	if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
	nlmsg_type <= AUDIT_LAST_USER_MSG) \|\|
	(nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
	nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
	*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
	} else {
	err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
	sizeof(nlmsg_audit_perms));
	}
	break;

	/* No messaging from userspace, or class unknown/unhandled */
	default:
	err = -ENOENT;
	break;
	}

	return err;
	}