1 | /* -*- Mode: C; tab-width: 4 -*- |
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2 | * |
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3 | * Copyright (c) 2003-2011 Apple Inc. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are met: |
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7 | * |
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8 | * 1. Redistributions of source code must retain the above copyright notice, |
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9 | * this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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11 | * this list of conditions and the following disclaimer in the documentation |
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12 | * and/or other materials provided with the distribution. |
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13 | * 3. Neither the name of Apple Inc. ("Apple") nor the names of its |
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14 | * contributors may be used to endorse or promote products derived from this |
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15 | * software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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26 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include "dnssd_ipc.h" |
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30 | |
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31 | #if defined(_WIN32) |
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32 | |
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33 | char *win32_strerror(int inErrorCode) |
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34 | { |
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35 | static char buffer[1024]; |
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36 | DWORD n; |
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37 | memset(buffer, 0, sizeof(buffer)); |
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38 | n = FormatMessageA( |
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39 | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, |
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40 | NULL, |
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41 | (DWORD) inErrorCode, |
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42 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
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43 | buffer, |
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44 | sizeof(buffer), |
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45 | NULL); |
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46 | if (n > 0) |
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47 | { |
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48 | // Remove any trailing CR's or LF's since some messages have them. |
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49 | while ((n > 0) && isspace(((unsigned char *) buffer)[n - 1])) |
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50 | buffer[--n] = '\0'; |
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51 | } |
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52 | return buffer; |
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53 | } |
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54 | |
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55 | #endif |
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56 | |
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57 | void put_uint32(const uint32_t l, char **ptr) |
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58 | { |
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59 | (*ptr)[0] = (char)((l >> 24) & 0xFF); |
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60 | (*ptr)[1] = (char)((l >> 16) & 0xFF); |
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61 | (*ptr)[2] = (char)((l >> 8) & 0xFF); |
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62 | (*ptr)[3] = (char)((l ) & 0xFF); |
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63 | *ptr += sizeof(uint32_t); |
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64 | } |
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65 | |
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66 | uint32_t get_uint32(const char **ptr, const char *end) |
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67 | { |
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68 | if (!*ptr || *ptr + sizeof(uint32_t) > end) |
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69 | { |
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70 | *ptr = NULL; |
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71 | return(0); |
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72 | } |
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73 | else |
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74 | { |
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75 | uint8_t *p = (uint8_t*) *ptr; |
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76 | *ptr += sizeof(uint32_t); |
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77 | return((uint32_t) ((uint32_t)p[0] << 24 | (uint32_t)p[1] << 16 | (uint32_t)p[2] << 8 | p[3])); |
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78 | } |
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79 | } |
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80 | |
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81 | void put_uint16(uint16_t s, char **ptr) |
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82 | { |
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83 | (*ptr)[0] = (char)((s >> 8) & 0xFF); |
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84 | (*ptr)[1] = (char)((s ) & 0xFF); |
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85 | *ptr += sizeof(uint16_t); |
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86 | } |
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87 | |
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88 | uint16_t get_uint16(const char **ptr, const char *end) |
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89 | { |
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90 | if (!*ptr || *ptr + sizeof(uint16_t) > end) |
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91 | { |
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92 | *ptr = NULL; |
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93 | return(0); |
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94 | } |
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95 | else |
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96 | { |
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97 | uint8_t *p = (uint8_t*) *ptr; |
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98 | *ptr += sizeof(uint16_t); |
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99 | return((uint16_t) ((uint16_t)p[0] << 8 | p[1])); |
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100 | } |
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101 | } |
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102 | |
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103 | int put_string(const char *str, char **ptr) |
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104 | { |
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105 | if (!str) str = ""; |
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106 | strcpy(*ptr, str); |
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107 | *ptr += strlen(str) + 1; |
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108 | return 0; |
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109 | } |
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110 | |
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111 | int get_string(const char **ptr, const char *const end, char *buffer, int buflen) |
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112 | { |
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113 | if (!*ptr) |
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114 | { |
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115 | *buffer = 0; |
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116 | return(-1); |
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117 | } |
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118 | else |
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119 | { |
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120 | char *lim = buffer + buflen; // Calculate limit |
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121 | while (*ptr < end && buffer < lim) |
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122 | { |
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123 | char c = *buffer++ = *(*ptr)++; |
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124 | if (c == 0) return(0); // Success |
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125 | } |
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126 | if (buffer == lim) buffer--; |
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127 | *buffer = 0; // Failed, so terminate string, |
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128 | *ptr = NULL; // clear pointer, |
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129 | return(-1); // and return failure indication |
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130 | } |
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131 | } |
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132 | |
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133 | void put_rdata(const int rdlen, const unsigned char *rdata, char **ptr) |
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134 | { |
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135 | memcpy(*ptr, rdata, rdlen); |
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136 | *ptr += rdlen; |
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137 | } |
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138 | |
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139 | const char *get_rdata(const char **ptr, const char *end, int rdlen) |
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140 | { |
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141 | if (!*ptr || *ptr + rdlen > end) |
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142 | { |
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143 | *ptr = NULL; |
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144 | return(0); |
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145 | } |
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146 | else |
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147 | { |
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148 | const char *rd = *ptr; |
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149 | *ptr += rdlen; |
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150 | return rd; |
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151 | } |
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152 | } |
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153 | |
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154 | void ConvertHeaderBytes(ipc_msg_hdr *hdr) |
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155 | { |
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156 | hdr->version = htonl(hdr->version); |
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157 | hdr->datalen = htonl(hdr->datalen); |
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158 | hdr->ipc_flags = htonl(hdr->ipc_flags); |
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159 | hdr->op = htonl(hdr->op ); |
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160 | hdr->reg_index = htonl(hdr->reg_index); |
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161 | } |
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