src/bus-proxyd/bus-xml-policy.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2013 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <inttypes.h>
  25 #include <pthread.h>
  26
  27 #include "list.h"
  28 #include "hashmap.h"
  29
  30 typedef enum PolicyItemType {
  31         _POLICY_ITEM_TYPE_UNSET = 0,
  32         POLICY_ITEM_ALLOW,
  33         POLICY_ITEM_DENY,
  34         _POLICY_ITEM_TYPE_MAX,
  35         _POLICY_ITEM_TYPE_INVALID = -1,
  36 } PolicyItemType;
  37
  38 typedef enum PolicyItemClass {
  39         _POLICY_ITEM_CLASS_UNSET = 0,
  40         POLICY_ITEM_SEND,
  41         POLICY_ITEM_RECV,
  42         POLICY_ITEM_OWN,
  43         POLICY_ITEM_OWN_PREFIX,
  44         POLICY_ITEM_USER,
  45         POLICY_ITEM_GROUP,
  46         POLICY_ITEM_IGNORE,
  47         _POLICY_ITEM_CLASS_MAX,
  48         _POLICY_ITEM_CLASS_INVALID = -1,
  49 } PolicyItemClass;
  50
  51 typedef struct PolicyItem PolicyItem;
  52
  53 struct PolicyItem {
  54         PolicyItemType type;
  55         PolicyItemClass class;
  56         char *interface;
  57         char *member;
  58         char *error;
  59         char *path;
  60         char *name;
  61         uint8_t message_type;
  62         uid_t uid;
  63         gid_t gid;
  64
  65         bool uid_valid, gid_valid;
  66
  67         LIST_FIELDS(PolicyItem, items);
  68 };
  69
  70 typedef struct Policy {
  71         LIST_HEAD(PolicyItem, default_items);
  72         LIST_HEAD(PolicyItem, mandatory_items);
  73         LIST_HEAD(PolicyItem, on_console_items);
  74         LIST_HEAD(PolicyItem, no_console_items);
  75         Hashmap *user_items;
  76         Hashmap *group_items;
  77 } Policy;
  78
  79 typedef struct SharedPolicy {
  80         char **configuration;
  81         pthread_mutex_t lock;
  82         pthread_rwlock_t rwlock;
  83         Policy buffer;
  84         Policy *policy;
  85 } SharedPolicy;
  86
  87 /* policy */
  88
  89 int policy_load(Policy *p, char **files);
  90 void policy_free(Policy *p);
  91
  92 bool policy_check_own(Policy *p, uid_t uid, gid_t gid, const char *name);
  93 bool policy_check_hello(Policy *p, uid_t uid, gid_t gid);
  94 bool policy_check_recv(Policy *p,
  95                        uid_t uid,
  96                        gid_t gid,
  97                        int message_type,
  98                        const char *name,
  99                        const char *path,
 100                        const char *interface,
 101                        const char *member,
 102                        bool dbus_to_kernel);
 103 bool policy_check_send(Policy *p,
 104                        uid_t uid,
 105                        gid_t gid,
 106                        int message_type,
 107                        const char *name,
 108                        const char *path,
 109                        const char *interface,
 110                        const char *member,
 111                        bool dbus_to_kernel);
 112
 113 void policy_dump(Policy *p);
 114
 115 const char* policy_item_type_to_string(PolicyItemType t) _const_;
 116 PolicyItemType policy_item_type_from_string(const char *s) _pure_;
 117
 118 const char* policy_item_class_to_string(PolicyItemClass t) _const_;
 119 PolicyItemClass policy_item_class_from_string(const char *s) _pure_;
 120
 121 /* shared policy */
 122
 123 int shared_policy_new(SharedPolicy **out);
 124 SharedPolicy *shared_policy_free(SharedPolicy *sp);
 125
 126 int shared_policy_reload(SharedPolicy *sp);
 127 int shared_policy_preload(SharedPolicy *sp, char **configuration);
 128 Policy *shared_policy_acquire(SharedPolicy *sp);
 129 void shared_policy_release(SharedPolicy *sp, Policy *p);
 130
 131 DEFINE_TRIVIAL_CLEANUP_FUNC(SharedPolicy*, shared_policy_free);