configd.tproj/_configopen.c

   1 /*
   2  * Copyright (c) 2000-2009, 2011 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         return CFStringCreateWithFormat(NULL, NULL, CFSTR("<SCDynamicStore MP>"));
  86 }
  87
  88
  89 __private_extern__
  90 kern_return_t
  91 _configopen(mach_port_t                 server,
  92             xmlData_t                   nameRef,                /* raw XML bytes */
  93             mach_msg_type_number_t      nameLen,
  94             xmlData_t                   optionsRef,             /* raw XML bytes */
  95             mach_msg_type_number_t      optionsLen,
  96             mach_port_t                 *newServer,
  97             int                         *sc_status,
  98             audit_token_t               audit_token)
  99 {
 100         CFDictionaryRef                 info;
 101         serverSessionRef                mySession;
 102         CFStringRef                     name            = NULL; /* name (un-serialized) */
 103         CFMutableDictionaryRef          newInfo;
 104         mach_port_t                     oldNotify;
 105         CFDictionaryRef                 options         = NULL; /* options (un-serialized) */
 106         CFStringRef                     sessionKey;
 107         kern_return_t                   status;
 108         SCDynamicStorePrivateRef        storePrivate;
 109         CFBooleanRef                    useSessionKeys  = NULL;
 110
 111         *sc_status = kSCStatusOK;
 112
 113         /* un-serialize the name */
 114         if (!_SCUnserializeString(&name, NULL, (void *)nameRef, nameLen)) {
 115                 *sc_status = kSCStatusFailed;
 116         }
 117
 118         if ((optionsRef != NULL) && (optionsLen > 0)) {
 119                 /* un-serialize the [session] options */
 120                 if (!_SCUnserialize((CFPropertyListRef *)&options, NULL, (void *)optionsRef, optionsLen)) {
 121                         *sc_status = kSCStatusFailed;
 122                 }
 123         }
 124
 125         if (*sc_status != kSCStatusOK) {
 126                 goto done;
 127         }
 128
 129         if (!isA_CFString(name)) {
 130                 *sc_status = kSCStatusInvalidArgument;
 131                 goto done;
 132         }
 133
 134         if (options != NULL) {
 135                 if (!isA_CFDictionary(options)) {
 136                         *sc_status = kSCStatusInvalidArgument;
 137                         goto done;
 138                 }
 139
 140                 /*
 141                  * [pre-]process any provided options
 142                  */
 143                 useSessionKeys = CFDictionaryGetValue(options, kSCDynamicStoreUseSessionKeys);
 144                 if (useSessionKeys != NULL) {
 145                         if (!isA_CFBoolean(useSessionKeys)) {
 146                                 *sc_status = kSCStatusInvalidArgument;
 147                                 goto done;
 148                         }
 149                 }
 150         }
 151
 152         /*
 153          * establish the new session
 154          */
 155         mySession = addSession(server, openMPCopyDescription);
 156         if (mySession == NULL) {
 157 #ifdef  DEBUG
 158                 SCLog(TRUE, LOG_DEBUG, CFSTR("_configopen(): session is already open."));
 159 #endif  /* DEBUG */
 160                 *sc_status = kSCStatusFailed;   /* you can't re-open an "open" session */
 161                 goto done;
 162         }
 163
 164         *newServer = mySession->key;
 165         __MACH_PORT_DEBUG(TRUE, "*** _configopen (after addSession)", *newServer);
 166
 167         /* save the audit_token in case we need to check the callers credentials */
 168         mySession->auditToken = audit_token;
 169
 170         /* Create and add a run loop source for the port */
 171         mySession->serverRunLoopSource = CFMachPortCreateRunLoopSource(NULL, mySession->serverPort, 0);
 172         CFRunLoopAddSource(CFRunLoopGetCurrent(),
 173                            mySession->serverRunLoopSource,
 174                            kCFRunLoopDefaultMode);
 175
 176         if (_configd_trace) {
 177                 SCTrace(TRUE, _configd_trace,
 178                         CFSTR("open    : %5d : %@\n"),
 179                         *newServer,
 180                         name);
 181         }
 182
 183         *sc_status = __SCDynamicStoreOpen(&mySession->store, name);
 184         storePrivate = (SCDynamicStorePrivateRef)mySession->store;
 185
 186         /*
 187          * Make the server port accessible to the framework routines.
 188          * ... and be sure to clear before calling CFRelease(store)
 189          */
 190         storePrivate->server = *newServer;
 191
 192         /*
 193          * Process any provided [session] options
 194          */
 195         if (useSessionKeys != NULL) {
 196                 storePrivate->useSessionKeys = CFBooleanGetValue(useSessionKeys);
 197         }
 198
 199         /* Request a notification when/if the client dies */
 200         status = mach_port_request_notification(mach_task_self(),
 201                                                 *newServer,
 202                                                 MACH_NOTIFY_NO_SENDERS,
 203                                                 1,
 204                                                 *newServer,
 205                                                 MACH_MSG_TYPE_MAKE_SEND_ONCE,
 206                                                 &oldNotify);
 207         if (status != KERN_SUCCESS) {
 208                 SCLog(TRUE, LOG_ERR, CFSTR("_configopen() mach_port_request_notification() failed: %s"), mach_error_string(status));
 209                 cleanupSession(*newServer);
 210                 *newServer = MACH_PORT_NULL;
 211                 *sc_status = kSCStatusFailed;
 212                 goto done;
 213         }
 214         __MACH_PORT_DEBUG(TRUE, "*** _configopen (after mach_port_request_notification)", *newServer);
 215
 216         if (oldNotify != MACH_PORT_NULL) {
 217                 SCLog(TRUE, LOG_ERR, CFSTR("_configopen(): oldNotify != MACH_PORT_NULL"));
 218         }
 219
 220         /*
 221          * Save the name of the calling application / plug-in with the session data.
 222          */
 223         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), *newServer);
 224         info = CFDictionaryGetValue(sessionData, sessionKey);
 225         if (info != NULL) {
 226                 newInfo = CFDictionaryCreateMutableCopy(NULL, 0, info);
 227         } else {
 228                 newInfo = CFDictionaryCreateMutable(NULL,
 229                                                     0,
 230                                                     &kCFTypeDictionaryKeyCallBacks,
 231                                                     &kCFTypeDictionaryValueCallBacks);
 232         }
 233         CFDictionarySetValue(newInfo, kSCDName, name);
 234         CFDictionarySetValue(sessionData, sessionKey, newInfo);
 235         CFRelease(newInfo);
 236         CFRelease(sessionKey);
 237
 238         /*
 239          * Note: at this time we should be holding ONE send right and
 240          *       ONE receive right to the server.  The send right is
 241          *       moved to the caller.
 242          */
 243
 244     done :
 245
 246         if (name != NULL)       CFRelease(name);
 247         if (options != NULL)    CFRelease(options);
 248         return KERN_SUCCESS;
 249 }