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 29 #include "dnssd_ipc.h" 30 31 #if defined(_WIN32) 32 33 char *win32_strerror(int inErrorCode) 34 { 35 static char buffer[1024]; 36 DWORD n; 37 memset(buffer, 0, sizeof(buffer)); 38 n = FormatMessageA( 39 FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 40 NULL, 41 (DWORD) inErrorCode, 42 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 43 buffer, 44 sizeof(buffer), 45 NULL); 46 if (n > 0) 47 { 48 // Remove any trailing CR's or LF's since some messages have them. 49 while ((n > 0) && isspace(((unsigned char *) buffer)[n - 1])) 50 buffer[--n] = '\0'; 51 } 52 return buffer; 53 } 54 55 #endif 56 57 void put_uint32(const uint32_t l, char **ptr) 58 { 59 (*ptr)[0] = (char)((l >> 24) & 0xFF); 60 (*ptr)[1] = (char)((l >> 16) & 0xFF); 61 (*ptr)[2] = (char)((l >> 8) & 0xFF); 62 (*ptr)[3] = (char)((l ) & 0xFF); 63 *ptr += sizeof(uint32_t); 64 } 65 66 uint32_t get_uint32(const char **ptr, const char *end) 67 { 68 if (!*ptr || *ptr + sizeof(uint32_t) > end) 69 { 70 *ptr = NULL; 71 return(0); 72 } 73 else 74 { 75 uint8_t *p = (uint8_t*) *ptr; 76 *ptr += sizeof(uint32_t); 77 return((uint32_t) ((uint32_t)p[0] << 24 | (uint32_t)p[1] << 16 | (uint32_t)p[2] << 8 | p[3])); 78 } 79 } 80 81 void put_uint16(uint16_t s, char **ptr) 82 { 83 (*ptr)[0] = (char)((s >> 8) & 0xFF); 84 (*ptr)[1] = (char)((s ) & 0xFF); 85 *ptr += sizeof(uint16_t); 86 } 87 88 uint16_t get_uint16(const char **ptr, const char *end) 89 { 90 if (!*ptr || *ptr + sizeof(uint16_t) > end) 91 { 92 *ptr = NULL; 93 return(0); 94 } 95 else 96 { 97 uint8_t *p = (uint8_t*) *ptr; 98 *ptr += sizeof(uint16_t); 99 return((uint16_t) ((uint16_t)p[0] << 8 | p[1])); 100 } 101 } 102 103 int put_string(const char *str, char **ptr) 104 { 105 if (!str) str = ""; 106 strcpy(*ptr, str); 107 *ptr += strlen(str) + 1; 108 return 0; 109 } 110 111 int get_string(const char **ptr, const char *const end, char *buffer, int buflen) 112 { 113 if (!*ptr) 114 { 115 *buffer = 0; 116 return(-1); 117 } 118 else 119 { 120 char *lim = buffer + buflen; // Calculate limit 121 while (*ptr < end && buffer < lim) 122 { 123 char c = *buffer++ = *(*ptr)++; 124 if (c == 0) return(0); // Success 125 } 126 if (buffer == lim) buffer--; 127 *buffer = 0; // Failed, so terminate string, 128 *ptr = NULL; // clear pointer, 129 return(-1); // and return failure indication 130 } 131 } 132 133 void put_rdata(const int rdlen, const unsigned char *rdata, char **ptr) 134 { 135 memcpy(*ptr, rdata, rdlen); 136 *ptr += rdlen; 137 } 138 139 const char *get_rdata(const char **ptr, const char *end, int rdlen) 140 { 141 if (!*ptr || *ptr + rdlen > end) 142 { 143 *ptr = NULL; 144 return(0); 145 } 146 else 147 { 148 const char *rd = *ptr; 149 *ptr += rdlen; 150 return rd; 151 } 152 } 153 154 void ConvertHeaderBytes(ipc_msg_hdr *hdr) 155 { 156 hdr->version = htonl(hdr->version); 157 hdr->datalen = htonl(hdr->datalen); 158 hdr->ipc_flags = htonl(hdr->ipc_flags); 159 hdr->op = htonl(hdr->op ); 160 hdr->reg_index = htonl(hdr->reg_index); 161 } 162