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213 lines
8.3 KiB
213 lines
8.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Netlink message type permission tables, for user generated messages. |
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* |
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* Author: James Morris <[email protected]> |
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* |
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* Copyright (C) 2004 Red Hat, Inc., James Morris <[email protected]> |
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*/ |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/netlink.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/if.h> |
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#include <linux/inet_diag.h> |
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#include <linux/xfrm.h> |
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#include <linux/audit.h> |
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#include <linux/sock_diag.h> |
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#include "flask.h" |
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#include "av_permissions.h" |
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#include "security.h" |
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struct nlmsg_perm { |
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u16 nlmsg_type; |
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u32 perm; |
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}; |
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static const struct nlmsg_perm nlmsg_route_perms[] = |
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{ |
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{ RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWCACHEREPORT, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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{ RTM_NEWLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_NEWVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_DELVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
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{ RTM_GETVLAN, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
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}; |
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static const struct nlmsg_perm nlmsg_tcpdiag_perms[] = |
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{ |
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{ TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
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{ DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
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{ SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
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{ SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE }, |
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}; |
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static const struct nlmsg_perm nlmsg_xfrm_perms[] = |
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{ |
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{ XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
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{ XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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{ XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
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}; |
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static const struct nlmsg_perm nlmsg_audit_perms[] = |
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{ |
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{ AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
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{ AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
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{ AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
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{ AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
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{ AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
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{ AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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{ AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
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{ AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT }, |
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{ AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
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{ AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
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}; |
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static int nlmsg_perm(u16 nlmsg_type, u32 *perm, const struct nlmsg_perm *tab, size_t tabsize) |
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{ |
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int i, err = -EINVAL; |
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for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) |
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if (nlmsg_type == tab[i].nlmsg_type) { |
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*perm = tab[i].perm; |
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err = 0; |
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break; |
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} |
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return err; |
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} |
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int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) |
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{ |
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int err = 0; |
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switch (sclass) { |
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case SECCLASS_NETLINK_ROUTE_SOCKET: |
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/* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3. |
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* If the BUILD_BUG_ON() below fails you must update the |
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* structures at the top of this file with the new mappings |
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* before updating the BUILD_BUG_ON() macro! |
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*/ |
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BUILD_BUG_ON(RTM_MAX != (RTM_NEWVLAN + 3)); |
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err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, |
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sizeof(nlmsg_route_perms)); |
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break; |
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case SECCLASS_NETLINK_TCPDIAG_SOCKET: |
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err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, |
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sizeof(nlmsg_tcpdiag_perms)); |
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break; |
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case SECCLASS_NETLINK_XFRM_SOCKET: |
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/* If the BUILD_BUG_ON() below fails you must update the |
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* structures at the top of this file with the new mappings |
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* before updating the BUILD_BUG_ON() macro! |
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*/ |
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BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_MAPPING); |
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err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, |
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sizeof(nlmsg_xfrm_perms)); |
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break; |
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case SECCLASS_NETLINK_AUDIT_SOCKET: |
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if ((nlmsg_type >= AUDIT_FIRST_USER_MSG && |
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nlmsg_type <= AUDIT_LAST_USER_MSG) || |
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(nlmsg_type >= AUDIT_FIRST_USER_MSG2 && |
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nlmsg_type <= AUDIT_LAST_USER_MSG2)) { |
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*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; |
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} else { |
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err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, |
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sizeof(nlmsg_audit_perms)); |
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} |
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break; |
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/* No messaging from userspace, or class unknown/unhandled */ |
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default: |
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err = -ENOENT; |
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break; |
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} |
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return err; |
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}
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