configd.tproj/_notifyviafd.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <unistd.h>
  24 #include <sys/ioctl.h>
  25 #include <sys/types.h>
  26 #include <sys/socket.h>
  27 #include <sys/un.h>
  28
  29 #include "configd.h"
  30 #include "session.h"
  31
  32
  33 SCDStatus
  34 _SCDNotifierInformViaFD(SCDSessionRef   session,
  35                        int32_t          identifier,
  36                        int              *fd)
  37 {
  38         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)session;
  39         int                     sock;
  40         CFStringRef             sessionKey;
  41         CFDictionaryRef         info;
  42
  43         SCDLog(LOG_DEBUG, CFSTR("_SCDNotifierInformViaFD:"));
  44
  45         if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
  46                 return SCD_NOSESSION;   /* you must have an open session to play */
  47         }
  48
  49         if (sessionPrivate->notifyStatus != NotifierNotRegistered) {
  50                 /* sorry, you can only have one notification registered at once */
  51                 return SCD_NOTIFIERACTIVE;
  52         }
  53
  54         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  55                 SCDLog(LOG_NOTICE, CFSTR("socket: %s"), strerror(errno));
  56                 return SCD_FAILED;
  57         }
  58
  59         *fd = sock;
  60
  61         /* push out a notification if any changes are pending */
  62         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), sessionPrivate->server);
  63         info = CFDictionaryGetValue(sessionData, sessionKey);
  64         CFRelease(sessionKey);
  65         if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) {
  66                 CFNumberRef     sessionNum;
  67
  68                 if (needsNotification == NULL)
  69                         needsNotification = CFSetCreateMutable(NULL,
  70                                                                0,
  71                                                                &kCFTypeSetCallBacks);
  72
  73                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &sessionPrivate->server);
  74                 CFSetAddValue(needsNotification, sessionNum);
  75                 CFRelease(sessionNum);
  76         }
  77
  78         return SCD_OK;
  79 }
  80
  81
  82 kern_return_t
  83 _notifyviafd(mach_port_t                server,
  84              xmlData_t                  pathRef,
  85              mach_msg_type_number_t     pathLen,
  86              int                        identifier,
  87              int                        *scd_status
  88 )
  89 {
  90         kern_return_t           status;
  91         serverSessionRef        mySession = getSession(server);
  92         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)mySession->session;
  93         struct sockaddr_un      un;
  94         int                     sock;
  95         int                     bufSiz  = sizeof(sessionPrivate->notifyFileIdentifier);
  96         int                     nbioYes = 1;
  97
  98         SCDLog(LOG_DEBUG, CFSTR("Send message via UNIX domain socket when a notification key changes."));
  99         SCDLog(LOG_DEBUG, CFSTR("  server = %d"), server);
 100         SCDLog(LOG_DEBUG, CFSTR("  path   = %s"), pathRef);
 101
 102         /*
 103          * if socket currently open, close it!
 104          */
 105         /* validate the UNIX domain socket path */
 106         if (pathLen > (sizeof(un.sun_path) - 1)) {
 107                 SCDLog(LOG_NOTICE, CFSTR("domain socket path length too long!"));
 108                 status = vm_deallocate(mach_task_self(), (vm_address_t)pathRef, pathLen);
 109                 if (status != KERN_SUCCESS) {
 110                         SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
 111                         /* non-fatal???, proceed */
 112                 }
 113                 *scd_status = SCD_FAILED;
 114                 return KERN_SUCCESS;
 115         }
 116
 117         /* un-serialize the UNIX domain socket path */
 118         un.sun_family = AF_UNIX;
 119         bcopy(pathRef, un.sun_path, pathLen);
 120         un.sun_path[pathLen] = '\0';
 121         status = vm_deallocate(mach_task_self(), (vm_address_t)pathRef, pathLen);
 122         if (status != KERN_SUCCESS) {
 123                 SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
 124                 /* non-fatal???, proceed */
 125         }
 126
 127         /* do common sanity checks, get socket */
 128         *scd_status = _SCDNotifierInformViaFD(mySession->session, identifier, &sock);
 129
 130         /* check status of _SCDNotifierInformViaFD() */
 131         if (*scd_status != SCD_OK) {
 132                 return KERN_SUCCESS;
 133         }
 134
 135         /* establish the connection, get ready for a read() */
 136         if (connect(sock, (struct sockaddr *)&un, sizeof(un)) == -1) {
 137                 SCDLog(LOG_DEBUG, CFSTR("connect: %s"), strerror(errno));
 138                 (void) close(sock);
 139                 sessionPrivate->notifyStatus = NotifierNotRegistered;
 140                 sessionPrivate->notifyFile   = -1;
 141                 *scd_status = SCD_FAILED;
 142                 return KERN_SUCCESS;
 143         }
 144
 145         SCDLog(LOG_NOTICE, CFSTR("  fd     = %d"), sock);
 146         (void) unlink(un.sun_path);
 147
 148         if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &bufSiz, sizeof(bufSiz)) < 0) {
 149                 SCDLog(LOG_DEBUG, CFSTR("setsockopt: %s"), strerror(errno));
 150                 (void) close(sock);
 151                 *scd_status = SCD_FAILED;
 152                 return KERN_SUCCESS;
 153         }
 154
 155         if (ioctl(sock, FIONBIO, &nbioYes) == -1) {
 156                 SCDLog(LOG_DEBUG, CFSTR("ioctl(,FIONBIO,): %s"), strerror(errno));
 157                 (void) close(sock);
 158                 *scd_status = SCD_FAILED;
 159                 return KERN_SUCCESS;
 160         }
 161
 162         /* set notifier active */
 163         sessionPrivate->notifyStatus         = Using_NotifierInformViaFD;
 164         sessionPrivate->notifyFile           = sock;
 165         sessionPrivate->notifyFileIdentifier = identifier;
 166
 167         return KERN_SUCCESS;
 168 }