configd.tproj/_configopen.c

   1 /*
   2  * Copyright (c) 2000-2009, 2011, 2015-2017 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Modification History
  26  *
  27  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "configd.h"
  35 #include "configd_server.h"
  36 #include "session.h"
  37
  38 #include <bsm/libbsm.h>
  39 #include <sys/types.h>
  40 #include <unistd.h>
  41
  42 __private_extern__
  43 int
  44 __SCDynamicStoreOpen(SCDynamicStoreRef *store, CFStringRef name)
  45 {
  46         /*
  47          * allocate and initialize a new session
  48          */
  49         *store = (SCDynamicStoreRef)__SCDynamicStoreCreatePrivate(NULL, name, NULL, NULL);
  50
  51         /*
  52          * If necessary, initialize the store and session data dictionaries
  53          */
  54         if (storeData == NULL) {
  55                 sessionData        = CFDictionaryCreateMutable(NULL,
  56                                                                0,
  57                                                                &kCFTypeDictionaryKeyCallBacks,
  58                                                                &kCFTypeDictionaryValueCallBacks);
  59                 storeData          = CFDictionaryCreateMutable(NULL,
  60                                                                0,
  61                                                                &kCFTypeDictionaryKeyCallBacks,
  62                                                                &kCFTypeDictionaryValueCallBacks);
  63                 patternData        = CFDictionaryCreateMutable(NULL,
  64                                                                0,
  65                                                                &kCFTypeDictionaryKeyCallBacks,
  66                                                                &kCFTypeDictionaryValueCallBacks);
  67                 changedKeys        = CFSetCreateMutable(NULL,
  68                                                         0,
  69                                                         &kCFTypeSetCallBacks);
  70                 deferredRemovals   = CFSetCreateMutable(NULL,
  71                                                         0,
  72                                                         &kCFTypeSetCallBacks);
  73                 removedSessionKeys = CFSetCreateMutable(NULL,
  74                                                         0,
  75                                                         &kCFTypeSetCallBacks);
  76         }
  77
  78         return kSCStatusOK;
  79 }
  80
  81
  82 static CFStringRef
  83 openMPCopyDescription(const void *info)
  84 {
  85 #pragma unused(info)
  86         return CFStringCreateWithFormat(NULL, NULL, CFSTR("<SCDynamicStore MP>"));
  87 }
  88
  89
  90 __private_extern__
  91 kern_return_t
  92 _configopen(mach_port_t                 server,
  93             xmlData_t                   nameRef,                /* raw XML bytes */
  94             mach_msg_type_number_t      nameLen,
  95             xmlData_t                   optionsRef,             /* raw XML bytes */
  96             mach_msg_type_number_t      optionsLen,
  97             mach_port_t                 *newServer,
  98             int                         *sc_status,
  99             audit_token_t               audit_token)
 100 {
 101         CFDictionaryRef                 info;
 102         serverSessionRef                mySession;
 103         CFStringRef                     name            = NULL; /* name (un-serialized) */
 104         CFMutableDictionaryRef          newInfo;
 105         mach_port_t                     oldNotify;
 106         CFDictionaryRef                 options         = NULL; /* options (un-serialized) */
 107         CFStringRef                     sessionKey;
 108         kern_return_t                   status;
 109         SCDynamicStorePrivateRef        storePrivate;
 110         CFBooleanRef                    useSessionKeys  = NULL;
 111
 112         *sc_status = kSCStatusOK;
 113
 114         /* un-serialize the name */
 115         if (!_SCUnserializeString(&name, NULL, (void *)nameRef, nameLen)) {
 116                 *sc_status = kSCStatusFailed;
 117         }
 118
 119         if ((optionsRef != NULL) && (optionsLen > 0)) {
 120                 /* un-serialize the [session] options */
 121                 if (!_SCUnserialize((CFPropertyListRef *)&options, NULL, (void *)optionsRef, optionsLen)) {
 122                         *sc_status = kSCStatusFailed;
 123                 }
 124         }
 125
 126         if (*sc_status != kSCStatusOK) {
 127                 goto done;
 128         }
 129
 130         if (!isA_CFString(name)) {
 131                 *sc_status = kSCStatusInvalidArgument;
 132                 goto done;
 133         }
 134
 135         if (options != NULL) {
 136                 if (!isA_CFDictionary(options)) {
 137                         *sc_status = kSCStatusInvalidArgument;
 138                         goto done;
 139                 }
 140
 141                 /*
 142                  * [pre-]process any provided options
 143                  */
 144                 useSessionKeys = CFDictionaryGetValue(options, kSCDynamicStoreUseSessionKeys);
 145                 if (useSessionKeys != NULL) {
 146                         if (!isA_CFBoolean(useSessionKeys)) {
 147                                 *sc_status = kSCStatusInvalidArgument;
 148                                 goto done;
 149                         }
 150                 }
 151         }
 152
 153         /*
 154          * establish the new session
 155          */
 156         mySession = addSession(server, openMPCopyDescription);
 157         if (mySession == NULL) {
 158                 SC_log(LOG_NOTICE, "session is already open");
 159                 *sc_status = kSCStatusFailed;   /* you can't re-open an "open" session */
 160                 goto done;
 161         }
 162
 163         *newServer = mySession->key;
 164         __MACH_PORT_DEBUG(TRUE, "*** _configopen (after addSession)", *newServer);
 165
 166         /* save the audit_token in case we need to check the callers credentials */
 167         mySession->auditToken = audit_token;
 168
 169         /* Create and add a run loop source for the port */
 170         mySession->serverRunLoopSource = CFMachPortCreateRunLoopSource(NULL, mySession->serverPort, 0);
 171         CFRunLoopAddSource(CFRunLoopGetCurrent(),
 172                            mySession->serverRunLoopSource,
 173                            kCFRunLoopDefaultMode);
 174
 175         SC_trace("open    : %5d : %@",
 176                  *newServer,
 177                  name);
 178
 179         *sc_status = __SCDynamicStoreOpen(&mySession->store, name);
 180         storePrivate = (SCDynamicStorePrivateRef)mySession->store;
 181
 182         /*
 183          * Make the server port accessible to the framework routines.
 184          * ... and be sure to clear before calling CFRelease(store)
 185          */
 186         storePrivate->server = *newServer;
 187
 188         /*
 189          * Process any provided [session] options
 190          */
 191         if (useSessionKeys != NULL) {
 192                 storePrivate->useSessionKeys = CFBooleanGetValue(useSessionKeys);
 193         }
 194
 195         /* Request a notification when/if the client dies */
 196         status = mach_port_request_notification(mach_task_self(),
 197                                                 *newServer,
 198                                                 MACH_NOTIFY_NO_SENDERS,
 199                                                 1,
 200                                                 *newServer,
 201                                                 MACH_MSG_TYPE_MAKE_SEND_ONCE,
 202                                                 &oldNotify);
 203         if (status != KERN_SUCCESS) {
 204                 SC_log(LOG_NOTICE, "mach_port_request_notification() failed: %s", mach_error_string(status));
 205                 cleanupSession(*newServer);
 206                 *newServer = MACH_PORT_NULL;
 207                 *sc_status = kSCStatusFailed;
 208                 goto done;
 209         }
 210         __MACH_PORT_DEBUG(TRUE, "*** _configopen (after mach_port_request_notification)", *newServer);
 211
 212         if (oldNotify != MACH_PORT_NULL) {
 213                 SC_log(LOG_NOTICE, "oldNotify != MACH_PORT_NULL");
 214         }
 215
 216         /*
 217          * Save the name of the calling application / plug-in with the session data.
 218          */
 219         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), *newServer);
 220         info = CFDictionaryGetValue(sessionData, sessionKey);
 221         if (info != NULL) {
 222                 newInfo = CFDictionaryCreateMutableCopy(NULL, 0, info);
 223         } else {
 224                 newInfo = CFDictionaryCreateMutable(NULL,
 225                                                     0,
 226                                                     &kCFTypeDictionaryKeyCallBacks,
 227                                                     &kCFTypeDictionaryValueCallBacks);
 228         }
 229         CFDictionarySetValue(newInfo, kSCDName, name);
 230         CFDictionarySetValue(sessionData, sessionKey, newInfo);
 231         CFRelease(newInfo);
 232         CFRelease(sessionKey);
 233
 234         /*
 235          * Note: at this time we should be holding ONE send right and
 236          *       ONE receive right to the server.  The send right is
 237          *       moved to the caller.
 238          */
 239
 240     done :
 241
 242         if (name != NULL)       CFRelease(name);
 243         if (options != NULL)    CFRelease(options);
 244         return KERN_SUCCESS;
 245 }