1 | //nnode.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | * NOTE for everyone want's to change something and send patches: |
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24 | * read README and HACKING! There a addition information on |
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25 | * the license of this document you need to read before you send |
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26 | * any patches. |
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27 | * |
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28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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29 | * or libpulse*: |
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30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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31 | * and are therefore GPL. Because of this it may be illigal to use |
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32 | * them with any software that uses libesd, libartsc or libpulse*. |
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33 | */ |
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34 | |
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35 | #include "libroar.h" |
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36 | |
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37 | #define _CHECK(x) if ( (x) == NULL ) return -1 |
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38 | |
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39 | int roar_nnode_new (struct roar_nnode * nnode, int socktype) { |
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40 | _CHECK(nnode); |
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41 | |
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42 | memset(nnode, 0, sizeof(struct roar_nnode)); |
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43 | |
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44 | nnode->socktype = socktype; |
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45 | |
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46 | return 0; |
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47 | } |
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48 | |
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49 | int roar_nnode_new_from_af(struct roar_nnode * nnode, int af) { |
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50 | int socktype; |
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51 | |
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52 | _CHECK(nnode); |
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53 | |
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54 | switch (af) { |
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55 | #ifdef ROAR_HAVE_IPV4 |
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56 | case AF_INET: socktype = ROAR_SOCKET_TYPE_INET; break; |
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57 | #endif |
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58 | #ifdef ROAR_HAVE_IPV6 |
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59 | case AF_INET6: socktype = ROAR_SOCKET_TYPE_INET6; break; |
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60 | #endif |
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61 | #ifdef ROAR_HAVE_UNIX |
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62 | case AF_UNIX: socktype = ROAR_SOCKET_TYPE_UNIX; break; |
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63 | #endif |
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64 | #ifdef ROAR_HAVE_LIBDNET |
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65 | case AF_DECnet: socktype = ROAR_SOCKET_TYPE_DECNET; break; |
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66 | #endif |
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67 | #ifdef ROAR_HAVE_IPX |
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68 | case AF_IPX: socktype = ROAR_SOCKET_TYPE_IPX; break; |
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69 | #endif |
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70 | default: |
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71 | return -1; |
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72 | break; |
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73 | } |
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74 | |
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75 | if ( roar_nnode_new(nnode, socktype) == -1 ) |
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76 | return -1; |
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77 | |
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78 | return 0; |
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79 | } |
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80 | |
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81 | int roar_nnode_new_from_sockaddr(struct roar_nnode * nnode, struct sockaddr * addr, socklen_t len) { |
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82 | _CHECK(nnode); |
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83 | _CHECK(addr); |
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84 | |
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85 | ROAR_DBG("roar_nnode_new_from_sockaddr(nnode=%p, addr=%p, len=%lu) = ?", nnode, addr, (unsigned long)len); |
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86 | |
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87 | if ( len < sizeof(addr->sa_family) ) |
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88 | return -1; |
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89 | |
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90 | ROAR_DBG("roar_nnode_new_from_sockaddr(nnode=%p, addr=%p, len=%lu) = ?", nnode, addr, (unsigned long)len); |
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91 | |
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92 | if ( roar_nnode_new_from_af(nnode, addr->sa_family) == -1 ) |
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93 | return -1; |
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94 | |
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95 | ROAR_DBG("roar_nnode_new_from_sockaddr(nnode=%p, addr=%p, len=%lu) = ?", nnode, addr, (unsigned long)len); |
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96 | |
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97 | switch (addr->sa_family) { |
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98 | #ifdef ROAR_HAVE_IPV4 |
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99 | case AF_INET: |
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100 | if ( len < sizeof(struct sockaddr_in) ) |
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101 | return -1; |
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102 | |
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103 | memcpy(nnode->addr.inet4, &(((struct sockaddr_in*)addr)->sin_addr), sizeof(nnode->addr.inet4)); |
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104 | break; |
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105 | #endif |
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106 | #ifdef ROAR_HAVE_IPV6 |
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107 | case AF_INET6: |
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108 | if ( len < sizeof(struct sockaddr_in6) ) |
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109 | return -1; |
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110 | |
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111 | memcpy(nnode->addr.inet6, ((struct sockaddr_in6*)addr)->sin6_addr.s6_addr, sizeof(nnode->addr.inet6)); |
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112 | break; |
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113 | #endif |
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114 | #ifdef ROAR_HAVE_UNIX |
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115 | case AF_UNIX: |
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116 | // nothing to do/save here. |
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117 | break; |
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118 | #endif |
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119 | #ifdef ROAR_HAVE_LIBDNET |
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120 | case AF_DECnet: |
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121 | if ( len < sizeof(struct sockaddr_dn) ) |
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122 | return -1; |
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123 | |
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124 | nnode->addr.decnet.node = ((struct sockaddr_dn*)addr)->sdn_add.a_addr[0]; |
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125 | nnode->addr.decnet.node |= (((struct sockaddr_dn*)addr)->sdn_add.a_addr[1] & 0x03) << 8; |
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126 | nnode->addr.decnet.area = ((struct sockaddr_dn*)addr)->sdn_add.a_addr[1] >> 2; |
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127 | break; |
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128 | #endif |
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129 | #ifdef ROAR_HAVE_IPX |
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130 | case AF_IPX: |
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131 | return -1; |
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132 | break; |
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133 | #endif |
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134 | default: |
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135 | return -1; |
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136 | break; |
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137 | } |
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138 | |
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139 | ROAR_DBG("roar_nnode_new_from_sockaddr(nnode=%p, addr=%p, len=%lu) = 0", nnode, addr, (unsigned long)len); |
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140 | return 0; |
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141 | } |
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142 | |
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143 | int roar_nnode_free (struct roar_nnode * nnode) { |
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144 | _CHECK(nnode); |
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145 | |
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146 | return 0; |
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147 | } |
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148 | |
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149 | int roar_nnode_get_socktype (struct roar_nnode * nnode) { |
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150 | _CHECK(nnode); |
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151 | |
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152 | return nnode->socktype; |
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153 | } |
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154 | |
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155 | int roar_nnode_to_str (struct roar_nnode * nnode, char * str, size_t len) { |
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156 | // Format: PROTO: nodename[nodeaddr] |
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157 | char proto[7] = "???"; |
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158 | char nodename[4] = ""; |
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159 | char nodeaddr[48 /* IPv6 */] = "???"; |
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160 | |
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161 | _CHECK(nnode); |
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162 | |
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163 | if ( len == 0 ) |
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164 | return 0; |
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165 | |
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166 | _CHECK(str); |
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167 | |
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168 | if ( len == 1 ) { |
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169 | *str = 0; |
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170 | return 0; |
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171 | } |
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172 | |
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173 | switch (nnode->socktype) { |
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174 | case ROAR_SOCKET_TYPE_UNIX: |
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175 | strcpy(proto, "UNIX"); |
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176 | strcpy(nodeaddr, "LOCAL"); |
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177 | break; |
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178 | case ROAR_SOCKET_TYPE_INET: |
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179 | strcpy(proto, "IPv4"); |
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180 | sprintf(nodeaddr, "%i.%i.%i.%i", |
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181 | nnode->addr.inet4[0], nnode->addr.inet4[1], |
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182 | nnode->addr.inet4[2], nnode->addr.inet4[3] |
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183 | ); |
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184 | break; |
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185 | case ROAR_SOCKET_TYPE_DECNET: |
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186 | strcpy(proto, "DECnet"); |
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187 | sprintf(nodeaddr, "%i.%i", nnode->addr.decnet.area, nnode->addr.decnet.node); |
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188 | break; |
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189 | case ROAR_SOCKET_TYPE_INET6: |
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190 | strcpy(proto, "IPv6"); |
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191 | break; |
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192 | case ROAR_SOCKET_TYPE_IPX: |
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193 | strcpy(proto, "IPX"); |
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194 | break; |
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195 | default: |
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196 | sprintf(proto, "P#%i", nnode->socktype); |
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197 | break; |
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198 | } |
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199 | |
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200 | if ( *nodename ) { |
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201 | snprintf(str, len, "%s: %s[%s]", proto, nodename, nodeaddr); |
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202 | } else { |
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203 | snprintf(str, len, "%s: %s", proto, nodeaddr); |
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204 | } |
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205 | |
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206 | str[len-1] = 0; |
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207 | |
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208 | return 0; |
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209 | } |
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210 | |
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211 | int roar_nnode_from_blob (struct roar_nnode * nnode, void * blob, size_t * len) { |
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212 | uint16_t socktype; |
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213 | |
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214 | _CHECK(nnode); |
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215 | _CHECK(blob); |
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216 | _CHECK(len); |
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217 | |
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218 | if ( *len < 2 ) |
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219 | return -1; |
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220 | |
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221 | memcpy(&socktype, blob, 2); |
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222 | |
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223 | socktype = ROAR_NET2HOST16(socktype); |
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224 | |
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225 | if ( roar_nnode_new(nnode, socktype) == -1 ) |
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226 | return -1; |
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227 | |
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228 | switch (socktype) { |
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229 | case ROAR_SOCKET_TYPE_UNIX: |
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230 | *len = 2; |
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231 | break; |
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232 | case ROAR_SOCKET_TYPE_INET: |
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233 | if ( *len < 6 ) |
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234 | return -1; |
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235 | |
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236 | memcpy(nnode->addr.inet4, blob+2, 4); |
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237 | |
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238 | *len = 6; |
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239 | break; |
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240 | case ROAR_SOCKET_TYPE_DECNET: |
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241 | if ( *len < 4 ) |
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242 | return -1; |
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243 | |
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244 | nnode->addr.decnet.node = ((unsigned char*)blob)[2]; |
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245 | nnode->addr.decnet.node = (((unsigned char*)blob)[3] & 0x03) << 8; |
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246 | nnode->addr.decnet.area = ((unsigned char*)blob)[3] >> 2; |
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247 | |
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248 | *len = 4; |
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249 | break; |
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250 | case ROAR_SOCKET_TYPE_INET6: |
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251 | if ( *len < 18 ) |
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252 | return -1; |
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253 | |
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254 | memcpy(nnode->addr.inet4, blob+2, 16); |
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255 | |
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256 | *len = 18; |
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257 | break; |
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258 | case ROAR_SOCKET_TYPE_IPX: |
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259 | default: |
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260 | return -1; |
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261 | break; |
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262 | } |
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263 | |
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264 | return 0; |
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265 | } |
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266 | |
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267 | int roar_nnode_to_blob (struct roar_nnode * nnode, void * blob, size_t * len) { |
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268 | uint16_t socktype_net; |
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269 | |
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270 | _CHECK(nnode); |
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271 | _CHECK(blob); |
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272 | _CHECK(len); |
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273 | |
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274 | if ( *len < 2 ) |
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275 | return -1; |
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276 | |
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277 | socktype_net = ROAR_HOST2NET16(nnode->socktype); |
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278 | |
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279 | memcpy(blob, &socktype_net, 2); |
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280 | |
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281 | switch (nnode->socktype) { |
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282 | case ROAR_SOCKET_TYPE_UNIX: |
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283 | // all UNIX sockets allways match. |
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284 | *len = 2; |
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285 | break; |
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286 | case ROAR_SOCKET_TYPE_INET: |
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287 | if ( *len < 6 ) |
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288 | return -1; |
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289 | |
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290 | memcpy(blob+2, nnode->addr.inet4, 4); |
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291 | *len = 6; |
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292 | |
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293 | break; |
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294 | case ROAR_SOCKET_TYPE_DECNET: |
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295 | if ( *len < 4 ) |
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296 | return -1; |
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297 | |
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298 | ((unsigned char*)blob)[2] = nnode->addr.decnet.node & 0x00FF; |
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299 | ((unsigned char*)blob)[3] = ((nnode->addr.decnet.node & 0x0300) >> 8) | (nnode->addr.decnet.area << 2); |
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300 | *len = 4; |
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301 | |
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302 | return -1; |
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303 | break; |
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304 | case ROAR_SOCKET_TYPE_INET6: |
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305 | if ( *len < 18 ) |
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306 | return -1; |
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307 | |
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308 | memcpy(blob+2, nnode->addr.inet4, 16); |
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309 | *len = 18; |
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310 | |
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311 | break; |
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312 | case ROAR_SOCKET_TYPE_IPX: |
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313 | default: |
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314 | return -1; |
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315 | break; |
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316 | } |
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317 | |
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318 | return 0; |
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319 | } |
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320 | |
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321 | int roar_nnode_cmp (struct roar_nnode * n0, struct roar_nnode * n1) { |
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322 | _CHECK(n0); |
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323 | _CHECK(n1); |
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324 | |
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325 | if ( n0->socktype != n1->socktype ) |
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326 | return 1; |
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327 | |
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328 | switch (n0->socktype) { |
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329 | case ROAR_SOCKET_TYPE_UNIX: |
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330 | // all UNIX sockets allways match. |
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331 | break; |
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332 | case ROAR_SOCKET_TYPE_INET: |
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333 | if ( memcmp(n0->addr.inet4, n1->addr.inet4, sizeof(n0->addr.inet4)) != 0 ) |
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334 | return 1; |
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335 | break; |
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336 | case ROAR_SOCKET_TYPE_DECNET: |
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337 | if ( n0->addr.decnet.area != n1->addr.decnet.area || |
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338 | n0->addr.decnet.node != n1->addr.decnet.node ) |
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339 | return 1; |
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340 | break; |
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341 | case ROAR_SOCKET_TYPE_INET6: |
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342 | if ( memcmp(n0->addr.inet6, n1->addr.inet6, sizeof(n0->addr.inet6)) != 0 ) |
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343 | return 1; |
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344 | break; |
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345 | case ROAR_SOCKET_TYPE_IPX: |
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346 | default: |
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347 | return -1; |
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348 | break; |
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349 | } |
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350 | |
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351 | return 0; |
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352 | } |
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353 | |
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354 | //ll |
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