configd.tproj/_configopen.c

   1 /*
   2  * Copyright (c) 2000-2009, 2011, 2015-2017, 2019 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         *newServer = MACH_PORT_NULL;
 113         *sc_status = kSCStatusOK;
 114
 115         /* un-serialize the name */
 116         if (!_SCUnserializeString(&name, NULL, (void *)nameRef, nameLen)) {
 117                 *sc_status = kSCStatusFailed;
 118         }
 119
 120         if ((optionsRef != NULL) && (optionsLen > 0)) {
 121                 /* un-serialize the [session] options */
 122                 if (!_SCUnserialize((CFPropertyListRef *)&options, NULL, (void *)optionsRef, optionsLen)) {
 123                         *sc_status = kSCStatusFailed;
 124                 }
 125         }
 126
 127         if (*sc_status != kSCStatusOK) {
 128                 goto done;
 129         }
 130
 131         if (!isA_CFString(name)) {
 132                 *sc_status = kSCStatusInvalidArgument;
 133                 goto done;
 134         }
 135
 136         if (options != NULL) {
 137                 if (!isA_CFDictionary(options)) {
 138                         *sc_status = kSCStatusInvalidArgument;
 139                         goto done;
 140                 }
 141
 142                 /*
 143                  * [pre-]process any provided options
 144                  */
 145                 useSessionKeys = CFDictionaryGetValue(options, kSCDynamicStoreUseSessionKeys);
 146                 if (useSessionKeys != NULL) {
 147                         if (!isA_CFBoolean(useSessionKeys)) {
 148                                 *sc_status = kSCStatusInvalidArgument;
 149                                 goto done;
 150                         }
 151                 }
 152         }
 153
 154         /*
 155          * establish the new session
 156          */
 157         mySession = addSession(server, openMPCopyDescription);
 158         if (mySession == NULL) {
 159                 SC_log(LOG_NOTICE, "session is already open");
 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         SC_trace("open    : %5d : %@",
 177                  *newServer,
 178                  name);
 179
 180         *sc_status = __SCDynamicStoreOpen(&mySession->store, name);
 181         storePrivate = (SCDynamicStorePrivateRef)mySession->store;
 182
 183         /*
 184          * Make the server port accessible to the framework routines.
 185          * ... and be sure to clear before calling CFRelease(store)
 186          */
 187         storePrivate->server = *newServer;
 188
 189         /*
 190          * Process any provided [session] options
 191          */
 192         if (useSessionKeys != NULL) {
 193                 storePrivate->useSessionKeys = CFBooleanGetValue(useSessionKeys);
 194         }
 195
 196         /* Request a notification when/if the client dies */
 197         status = mach_port_request_notification(mach_task_self(),
 198                                                 *newServer,
 199                                                 MACH_NOTIFY_NO_SENDERS,
 200                                                 1,
 201                                                 *newServer,
 202                                                 MACH_MSG_TYPE_MAKE_SEND_ONCE,
 203                                                 &oldNotify);
 204         if (status != KERN_SUCCESS) {
 205                 SC_log(LOG_NOTICE, "mach_port_request_notification() failed: %s", mach_error_string(status));
 206                 cleanupSession(*newServer);
 207                 *newServer = MACH_PORT_NULL;
 208                 *sc_status = kSCStatusFailed;
 209                 goto done;
 210         }
 211         __MACH_PORT_DEBUG(TRUE, "*** _configopen (after mach_port_request_notification)", *newServer);
 212
 213         if (oldNotify != MACH_PORT_NULL) {
 214                 SC_log(LOG_NOTICE, "oldNotify != MACH_PORT_NULL");
 215         }
 216
 217         /*
 218          * Save the name of the calling application / plug-in with the session data.
 219          */
 220         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), *newServer);
 221         info = CFDictionaryGetValue(sessionData, sessionKey);
 222         if (info != NULL) {
 223                 newInfo = CFDictionaryCreateMutableCopy(NULL, 0, info);
 224         } else {
 225                 newInfo = CFDictionaryCreateMutable(NULL,
 226                                                     0,
 227                                                     &kCFTypeDictionaryKeyCallBacks,
 228                                                     &kCFTypeDictionaryValueCallBacks);
 229         }
 230         CFDictionarySetValue(newInfo, kSCDName, name);
 231         CFDictionarySetValue(sessionData, sessionKey, newInfo);
 232         CFRelease(newInfo);
 233         CFRelease(sessionKey);
 234
 235         /*
 236          * Note: at this time we should be holding ONE send right and
 237          *       ONE receive right to the server.  The send right is
 238          *       moved to the caller.
 239          */
 240
 241     done :
 242
 243         if (name != NULL)       CFRelease(name);
 244         if (options != NULL)    CFRelease(options);
 245         return KERN_SUCCESS;
 246 }