Robert Greenwalt | 47e4ceb | 2012-03-26 15:36:57 -0700 | [diff] [blame^] | 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 | } |