mDNSShared/dnssd_ipc.c

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2003-2004, Apple Computer, Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright notice,
   9  *     this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright notice,
  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of its
  14  *     contributors may be used to endorse or promote products derived from this
  15  *     software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27
  28         Change History (most recent first):
  29
  30 $Log: dnssd_ipc.c,v $
  31 Revision 1.16  2006/08/14 23:05:53  cheshire
  32 Added "tab-width" emacs header line
  33
  34 Revision 1.15  2005/01/27 22:57:56  cheshire
  35 Fix compile errors on gcc4
  36
  37 Revision 1.14  2004/10/06 02:22:20  cheshire
  38 Changed MacRoman copyright symbol (should have been UTF-8 in any case :-) to ASCII-compatible "(c)"
  39
  40 Revision 1.13  2004/10/01 22:15:55  rpantos
  41 rdar://problem/3824265: Replace APSL in client lib with BSD license.
  42
  43 Revision 1.12  2004/09/16 23:14:24  cheshire
  44 Changes for Windows compatibility
  45
  46 Revision 1.11  2004/06/18 04:56:09  rpantos
  47 casting goodness
  48
  49 Revision 1.10  2004/06/12 01:08:14  cheshire
  50 Changes for Windows compatibility
  51
  52 Revision 1.9  2004/05/18 23:51:27  cheshire
  53 Tidy up all checkin comments to use consistent "<rdar://problem/xxxxxxx>" format for bug numbers
  54
  55 Revision 1.8  2003/11/05 22:44:57  ksekar
  56 <rdar://problem/3335230>: No bounds checking when reading data from client
  57 Reviewed by: Stuart Cheshire
  58
  59 Revision 1.7  2003/08/12 19:56:25  cheshire
  60 Update to APSL 2.0
  61
  62  */
  63
  64 #include "dnssd_ipc.h"
  65
  66 void put_long(const uint32_t l, char **ptr)
  67         {
  68         (*ptr)[0] = (char)((l >> 24) &  0xFF);
  69         (*ptr)[1] = (char)((l >> 16) &  0xFF);
  70         (*ptr)[2] = (char)((l >>  8) &  0xFF);
  71         (*ptr)[3] = (char)((l      ) &  0xFF);
  72         *ptr += sizeof(uint32_t);
  73         }
  74
  75 uint32_t get_long(char **ptr)
  76         {
  77         uint8_t *p = (uint8_t*) *ptr;
  78         *ptr += sizeof(uint32_t);
  79         return((uint32_t) ((uint32_t)p[0] << 24 | (uint32_t)p[1] << 16 | (uint32_t)p[2] << 8 | p[3]));
  80         }
  81
  82 void put_short(uint16_t s, char **ptr)
  83         {
  84         (*ptr)[0] = (char)((s >>  8) &  0xFF);
  85         (*ptr)[1] = (char)((s      ) &  0xFF);
  86         *ptr += sizeof(uint16_t);
  87         }
  88
  89 uint16_t get_short(char **ptr)
  90         {
  91         uint8_t *p = (uint8_t*) *ptr;
  92         *ptr += sizeof(uint16_t);
  93         return((uint16_t) ((uint16_t)p[0] << 8 | p[1]));
  94         }
  95
  96 int put_string(const char *str, char **ptr)
  97         {
  98         if (!str) str = "";
  99         strcpy(*ptr, str);
 100         *ptr += strlen(str) + 1;
 101         return 0;
 102         }
 103
 104 int get_string(char **ptr, char *buffer, int buflen)
 105         {
 106         int overrun = (int)strlen(*ptr) <  buflen ? 0 : -1;
 107         strncpy(buffer, *ptr,  buflen - 1);
 108         buffer[buflen - 1] = '\0';
 109         *ptr += strlen(buffer) + 1;
 110         return overrun;
 111         }
 112
 113 void put_rdata(const int rdlen, const unsigned char *rdata, char **ptr)
 114         {
 115         memcpy(*ptr, rdata, rdlen);
 116         *ptr += rdlen;
 117         }
 118
 119 char *get_rdata(char **ptr, int rdlen)
 120         {
 121         char *rd = *ptr;
 122         *ptr += rdlen;
 123         return rd;
 124         }
 125
 126 void ConvertHeaderBytes(ipc_msg_hdr *hdr)
 127         {
 128         hdr->version   = htonl(hdr->version);
 129         hdr->datalen   = htonl(hdr->datalen);
 130         hdr->flags     = htonl(hdr->flags);
 131         hdr->op        = htonl(hdr->op );
 132         hdr->reg_index = htonl(hdr->reg_index);
 133         }