mDNSShared/dnssd_ipc.c

   1 /*
   2  * Copyright (c) 2003-2004, Apple Computer, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1.  Redistributions of source code must retain the above copyright notice,
   8  *     this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright notice,
  10  *     this list of conditions and the following disclaimer in the documentation
  11  *     and/or other materials provided with the distribution.
  12  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of its
  13  *     contributors may be used to endorse or promote products derived from this
  14  *     software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27         Change History (most recent first):
  28
  29 $Log: dnssd_ipc.c,v $
  30 Revision 1.15  2005/01/27 22:57:56  cheshire
  31 Fix compile errors on gcc4
  32
  33 Revision 1.14  2004/10/06 02:22:20  cheshire
  34 Changed MacRoman copyright symbol (should have been UTF-8 in any case :-) to ASCII-compatible "(c)"
  35
  36 Revision 1.13  2004/10/01 22:15:55  rpantos
  37 rdar://problem/3824265: Replace APSL in client lib with BSD license.
  38
  39 Revision 1.12  2004/09/16 23:14:24  cheshire
  40 Changes for Windows compatibility
  41
  42 Revision 1.11  2004/06/18 04:56:09  rpantos
  43 casting goodness
  44
  45 Revision 1.10  2004/06/12 01:08:14  cheshire
  46 Changes for Windows compatibility
  47
  48 Revision 1.9  2004/05/18 23:51:27  cheshire
  49 Tidy up all checkin comments to use consistent "<rdar://problem/xxxxxxx>" format for bug numbers
  50
  51 Revision 1.8  2003/11/05 22:44:57  ksekar
  52 <rdar://problem/3335230>: No bounds checking when reading data from client
  53 Reviewed by: Stuart Cheshire
  54
  55 Revision 1.7  2003/08/12 19:56:25  cheshire
  56 Update to APSL 2.0
  57
  58  */
  59
  60 #include "dnssd_ipc.h"
  61
  62 void put_long(const uint32_t l, char **ptr)
  63         {
  64         (*ptr)[0] = (char)((l >> 24) &  0xFF);
  65         (*ptr)[1] = (char)((l >> 16) &  0xFF);
  66         (*ptr)[2] = (char)((l >>  8) &  0xFF);
  67         (*ptr)[3] = (char)((l      ) &  0xFF);
  68         *ptr += sizeof(uint32_t);
  69         }
  70
  71 uint32_t get_long(char **ptr)
  72         {
  73         uint8_t *p = (uint8_t*) *ptr;
  74         *ptr += sizeof(uint32_t);
  75         return((uint32_t) ((uint32_t)p[0] << 24 | (uint32_t)p[1] << 16 | (uint32_t)p[2] << 8 | p[3]));
  76         }
  77
  78 void put_short(uint16_t s, char **ptr)
  79         {
  80         (*ptr)[0] = (char)((s >>  8) &  0xFF);
  81         (*ptr)[1] = (char)((s      ) &  0xFF);
  82         *ptr += sizeof(uint16_t);
  83         }
  84
  85 uint16_t get_short(char **ptr)
  86         {
  87         uint8_t *p = (uint8_t*) *ptr;
  88         *ptr += sizeof(uint16_t);
  89         return((uint16_t) ((uint16_t)p[0] << 8 | p[1]));
  90         }
  91
  92 int put_string(const char *str, char **ptr)
  93         {
  94         if (!str) str = "";
  95         strcpy(*ptr, str);
  96         *ptr += strlen(str) + 1;
  97         return 0;
  98         }
  99
 100 int get_string(char **ptr, char *buffer, int buflen)
 101         {
 102         int overrun = (int)strlen(*ptr) <  buflen ? 0 : -1;
 103         strncpy(buffer, *ptr,  buflen - 1);
 104         buffer[buflen - 1] = '\0';
 105         *ptr += strlen(buffer) + 1;
 106         return overrun;
 107         }
 108
 109 void put_rdata(const int rdlen, const unsigned char *rdata, char **ptr)
 110         {
 111         memcpy(*ptr, rdata, rdlen);
 112         *ptr += rdlen;
 113         }
 114
 115 char *get_rdata(char **ptr, int rdlen)
 116         {
 117         char *rd = *ptr;
 118         *ptr += rdlen;
 119         return rd;
 120         }
 121
 122 void ConvertHeaderBytes(ipc_msg_hdr *hdr)
 123         {
 124         hdr->version   = htonl(hdr->version);
 125         hdr->datalen   = htonl(hdr->datalen);
 126         hdr->flags     = htonl(hdr->flags);
 127         hdr->op        = htonl(hdr->op );
 128         hdr->reg_index = htonl(hdr->reg_index);
 129         }