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[/] [test_project/] [trunk/] [linux_sd_driver/] [security/] [selinux/] [nlmsgtab.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl 
/*
2 
 * Netlink message type permission tables, for user generated messages.
3 
 *
4 
 * Author: James Morris <jmorris@redhat.com>
5 
 *
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 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License version 2,
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 * as published by the Free Software Foundation.
11 
 */
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/skbuff.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/netfilter_ipv4/ip_queue.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>
22 
 
23 
#include "flask.h"
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#include "av_permissions.h"
25 
 
26 
struct nlmsg_perm
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{
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        u16     nlmsg_type;
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        u32     perm;
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};
31 
 
32 
static 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 },
67 
};
68 
 
69 
static struct nlmsg_perm nlmsg_firewall_perms[] =
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{
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        { IPQM_MODE,            NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
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        { IPQM_VERDICT,         NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
73 
};
74 
 
75 
static 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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};
80 
 
81 
static struct nlmsg_perm nlmsg_xfrm_perms[] =
82 
{
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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 },
92 
        { XFRM_MSG_UPDPOLICY,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
93 
        { XFRM_MSG_UPDSA,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
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        { XFRM_MSG_POLEXPIRE,   NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 
        { XFRM_MSG_FLUSHSA,     NETLINK_XFRM_SOCKET__NLMSG_WRITE },
96 
        { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
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        { XFRM_MSG_NEWAE,       NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98 
        { XFRM_MSG_GETAE,       NETLINK_XFRM_SOCKET__NLMSG_READ  },
99 
};
100 
 
101 
static struct nlmsg_perm nlmsg_audit_perms[] =
102 
{
103 
        { AUDIT_GET,            NETLINK_AUDIT_SOCKET__NLMSG_READ     },
104 
        { AUDIT_SET,            NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
105 
        { AUDIT_LIST,           NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
106 
        { 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 },
109 
        { AUDIT_ADD_RULE,       NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
110 
        { AUDIT_DEL_RULE,       NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
111 
        { AUDIT_USER,           NETLINK_AUDIT_SOCKET__NLMSG_RELAY    },
112 
        { AUDIT_SIGNAL_INFO,    NETLINK_AUDIT_SOCKET__NLMSG_READ     },
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        { AUDIT_TTY_GET,        NETLINK_AUDIT_SOCKET__NLMSG_READ     },
114 
        { AUDIT_TTY_SET,        NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
115 
};
116 
 
117 
 
118 
static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
119 
{
120 
        int i, err = -EINVAL;
121 
 
122 
        for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
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                if (nlmsg_type == tab[i].nlmsg_type) {
124 
                        *perm = tab[i].perm;
125 
                        err = 0;
126 
                        break;
127 
                }
128 
 
129 
        return err;
130 
}
131 
 
132 
int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
133 
{
134 
        int err = 0;
135 
 
136 
        switch (sclass) {
137 
        case SECCLASS_NETLINK_ROUTE_SOCKET:
138 
                err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
139 
                                 sizeof(nlmsg_route_perms));
140 
                break;
141 
 
142 
        case SECCLASS_NETLINK_FIREWALL_SOCKET:
143 
        case SECCLASS_NETLINK_IP6FW_SOCKET:
144 
                err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
145 
                                 sizeof(nlmsg_firewall_perms));
146 
                break;
147 
 
148 
        case SECCLASS_NETLINK_TCPDIAG_SOCKET:
149 
                err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
150 
                                 sizeof(nlmsg_tcpdiag_perms));
151 
                break;
152 
 
153 
        case SECCLASS_NETLINK_XFRM_SOCKET:
154 
                err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
155 
                                 sizeof(nlmsg_xfrm_perms));
156 
                break;
157 
 
158 
        case SECCLASS_NETLINK_AUDIT_SOCKET:
159 
                if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
160 
                     nlmsg_type <= AUDIT_LAST_USER_MSG) ||
161 
                    (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
162 
                     nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
163 
                        *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
164 
                } else {
165 
                        err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
166 
                                         sizeof(nlmsg_audit_perms));
167 
                }
168 
                break;
169 
 
170 
        /* No messaging from userspace, or class unknown/unhandled */
171 
        default:
172 
                err = -ENOENT;
173 
                break;
174 
        }
175 
 
176 
        return err;
177 
}

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